mirror of https://github.com/g012/l65.git
Moved from metalua to a derivative of LuaMinify.
This commit is contained in:
parent
3db5fd64c3
commit
411e46f6f7
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@ -1,43 +1,2 @@
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/build
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# Compiled Lua sources
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luac.out
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# luarocks build files
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*.src.rock
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*.zip
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*.tar.gz
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# Object files
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*.o
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*.os
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*.ko
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*.obj
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*.elf
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# Precompiled Headers
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*.gch
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*.pch
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# Libraries
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*.lib
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*.a
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*.la
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*.lo
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*.def
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*.exp
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# Shared objects (inc. Windows DLLs)
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*.dll
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*.so
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*.so.*
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*.dylib
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# Executables
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*.exe
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*.out
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*.app
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*.i*86
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*.x86_64
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*.hex
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/build
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/tmp
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@ -0,0 +1,7 @@
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local macro = require "macro"
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function addressing(get)
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local t,v = get:next()
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end
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macro.define('lda', addressing)
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@ -0,0 +1,82 @@
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adressing = {
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imm=0x09, zp=0x05, zpx=0x15, ab=0x0d, abx=0x1d, aby=0x19, inx=0x01, iny=0x11,
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acc=0x09,
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}
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encode = {
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adc=0x60,
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['and']=0x20,
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asl=0x01,
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lda=0xa0,
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sta=0x80,
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--lda = { imm=0xa9, zp=0xa5, zpx=0xb5, ab=0xad, abx=0xbd, aby=0xb9, inx=0xa1, iny=0xb1 },
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}
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--[=[
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adressages:
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lda #10 lda(10) lda"#10"
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lda 10 lda{10} lda"10"
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lda 10,x lda{10,"x"} ldax{10} lda{x=10} lda"10,x"
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lda $1000 lda{0x1000}
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lda $1000,x lda{0x1000,"x"} ldax{0x1000}
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lda $1000,y lda{0x1000,"y"} lday{0x1000}
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lda (10,x) lda{10,"(x)"} lda_x{10} a=(10,x) a=mem[zp[10+x]] lda"(10,x)"
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lda (10),y lda{10,"(y)"} lda_y{10} a=(10),y a=mem[zp[10]+y] lda"(10),y"
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sta 10 sta{10}
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sta 10,x sta{10,"x"}
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sta $1000 sta{0x1000}
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sta $1000,x sta{0x1000,"x"}
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sta $1000,y sta{0x1000,"y"}
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sta (10,x) sta{10,"(x)"}
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sta (10),y sta{10,"(y)"}
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]=]
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local function setfenv(fn, env)
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local i = 1
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while true do
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local name = debug.getupvalue(fn, i)
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if name == "_ENV" then
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debug.upvaluejoin(fn, i, (function() return env end), 1)
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break
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elseif not name then break end
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i = i + 1
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end
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return fn
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end
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local function getfenv(fn)
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local i = 1
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while true do
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local name, val = debug.getupvalue(fn, i)
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if name == "_ENV" then return val
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elseif not name then break end
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i = i + 1
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end
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end
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asm6502_env = {
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lda = function(v)
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emit(0xa9, v)
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end,
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}
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function asm(f, ...)
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setfenv(f, asm6502_env)
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f(...)
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end
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a,x,y = 0,0,0
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do
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local regs = { a="a", x="x", y="y" }
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setmetatable(_G, {
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__index = function(t,k,v)
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if regs[k] then assert(loadstring("ld" .. k .. "(" .. v .. ")"))() end
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return t[k]
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end,
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__newindex = function(t,k,v)
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if regs[k] then assert(loadstring("st" .. k .. "(" .. v .. ")"))() end
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t[k] = v
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end,
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})
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end
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@ -0,0 +1,79 @@
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dofile "vcs.lua"
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TIM_OVERSCAN = 50 -- TIM64T, 3200 cycles = ~ 42 scanlines
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TIM_VBLANK = 61 -- TIM64T, 3904 cycles = ~ 51 scanlines
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TIM_KERNEL = 17 -- T1024T, 17408 cycles = ~229 scanlines
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location(0xf000, 0xffff)
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section "waitForIntim"
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-- n_{ a=INTIM } ?
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--lda(INTIM) -- or a=INTIM
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--bne "waitForIntim"
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ldx #0xf0
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lda #0xac
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lda #INTIM
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lda 0xbeef
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lda INTIM
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lda INTIM,x
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lda INTIM,y
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lda (INTIM,x)
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lda (INTIM),y
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asl
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asl INTIM
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asl
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bne "test"
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bne waitForIntim
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bne f()
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bne _toto
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rts
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--[[
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section "doOverscan"
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sta{WSYNC} -- WSYNC=a
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lda(2) sta{VBLANK} -- a=2 VBLANK=a
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lda(TIM_OVERSCAN) sta{TIM64T} -- a=TIM_OVERSCAN TIM64T=a
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jsr "waitForIntim"
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section "doVBlank"
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lda(0x0e)
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label ".vsyncLoop"
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sta{WSYNC}
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sta{VSYNC}
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lsr()
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bne ".vsyncLoop"
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lda(2)
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sta{VBLANK}
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lda(TIM_VBLANK)
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sta{TIM64T}
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jsr "waitForIntim"
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section "doKernel"
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lda(TIM_KERNEL)
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sta{T1024T}
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jsr "waitForIntim"
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section "start"
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-- clear zeropage
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cld()
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ldx(0)
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txa()
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label ".clearLoop"
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dex()
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tsx()
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pha()
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bne ".clearLoop"
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-- main
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label "mainLoop"
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jsr "doOverscan"
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jsr "doVBlank"
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jsr "doKernel"
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jmp "mainLoop"
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section{ name="vectors", org=0xfffc }
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word{ "start", "start" }
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]]
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@ -0,0 +1,24 @@
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dofile "vcs.lua"
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TIM_OVERSCAN = 50
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TIM_VBLANK = 61
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TIM_KERNEL = 17
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location(0xf000, 0xffff)
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section "waitForIntim"
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ldx_immediate(0xf0)
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lda_immediate(0xac)
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lda_immediate(INTIM)
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lda_absolute(0xbeef)
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lda_absolute(INTIM)
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lda_absolute_x(INTIM)
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lda_absolute_x(INTIM)
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lda_indirect_x(INTIM)
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lda_indirect_y(INTIM)
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asl_implied()
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asl_absolute(INTIM)
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asl_implied()
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bne_relative("test")
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bne_relative("waitForIntim")
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bne_relative(f())
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bne_relative("_toto")
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rts_implied()
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@ -0,0 +1,990 @@
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/*
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* lfs.c and lfs.h mixed together
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*/
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/*
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** LuaFileSystem
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** Copyright Kepler Project 2003 - 2016 (http://keplerproject.github.io/luafilesystem)
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*/
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/* Define 'chdir' for systems that do not implement it */
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#ifdef NO_CHDIR
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#define chdir(p) (-1)
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#define chdir_error "Function 'chdir' not provided by system"
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#else
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#define chdir_error strerror(errno)
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#endif
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#ifdef _WIN32
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#define chdir(p) (_chdir(p))
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#define getcwd(d, s) (_getcwd(d, s))
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#define rmdir(p) (_rmdir(p))
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#define LFS_EXPORT __declspec (dllexport)
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#ifndef fileno
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#define fileno(f) (_fileno(f))
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#endif
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#else
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#define LFS_EXPORT
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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LFS_EXPORT int luaopen_lfs (lua_State *L);
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#ifdef __cplusplus
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}
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#endif
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/*
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** LuaFileSystem
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** Copyright Kepler Project 2003 - 2016 (http://keplerproject.github.io/luafilesystem)
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**
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** File system manipulation library.
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** This library offers these functions:
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** lfs.attributes (filepath [, attributename | attributetable])
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** lfs.chdir (path)
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** lfs.currentdir ()
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** lfs.dir (path)
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** lfs.link (old, new[, symlink])
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** lfs.lock (fh, mode)
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** lfs.lock_dir (path)
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** lfs.mkdir (path)
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** lfs.rmdir (path)
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** lfs.setmode (filepath, mode)
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** lfs.symlinkattributes (filepath [, attributename])
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** lfs.touch (filepath [, atime [, mtime]])
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||||
** lfs.unlock (fh)
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||||
*/
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||||
#ifndef LFS_DO_NOT_USE_LARGE_FILE
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#ifndef _WIN32
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||||
#ifndef _AIX
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||||
#define _FILE_OFFSET_BITS 64 /* Linux, Solaris and HP-UX */
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||||
#else
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||||
#define _LARGE_FILES 1 /* AIX */
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||||
#endif
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||||
#endif
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||||
#endif
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||||
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||||
#ifndef LFS_DO_NOT_USE_LARGE_FILE
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#define _LARGEFILE64_SOURCE
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||||
#endif
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||||
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||||
#include <errno.h>
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||||
#include <stdio.h>
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||||
#include <string.h>
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||||
#include <stdlib.h>
|
||||
#include <time.h>
|
||||
#include <sys/stat.h>
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||||
|
||||
#ifdef _WIN32
|
||||
#include <direct.h>
|
||||
#include <windows.h>
|
||||
#include <io.h>
|
||||
#include <sys/locking.h>
|
||||
#ifdef __BORLANDC__
|
||||
#include <utime.h>
|
||||
#else
|
||||
#include <sys/utime.h>
|
||||
#endif
|
||||
#include <fcntl.h>
|
||||
/* MAX_PATH seems to be 260. Seems kind of small. Is there a better one? */
|
||||
#define LFS_MAXPATHLEN MAX_PATH
|
||||
#else
|
||||
#include <unistd.h>
|
||||
#include <dirent.h>
|
||||
#include <fcntl.h>
|
||||
#include <sys/types.h>
|
||||
#include <utime.h>
|
||||
#include <sys/param.h> /* for MAXPATHLEN */
|
||||
#define LFS_MAXPATHLEN MAXPATHLEN
|
||||
#endif
|
||||
|
||||
//#include <lua.h>
|
||||
//#include <lauxlib.h>
|
||||
//#include <lualib.h>
|
||||
|
||||
//#include "lfs.h"
|
||||
|
||||
#define LFS_VERSION "1.6.3"
|
||||
#define LFS_LIBNAME "lfs"
|
||||
|
||||
#if LUA_VERSION_NUM >= 503 /* Lua 5.3 */
|
||||
|
||||
#ifndef luaL_optlong
|
||||
#define luaL_optlong luaL_optinteger
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
#if LUA_VERSION_NUM < 502
|
||||
# define luaL_newlib(L,l) (lua_newtable(L), luaL_register(L,NULL,l))
|
||||
#endif
|
||||
|
||||
/* Define 'strerror' for systems that do not implement it */
|
||||
#ifdef NO_STRERROR
|
||||
#define strerror(_) "System unable to describe the error"
|
||||
#endif
|
||||
|
||||
#define DIR_METATABLE "directory metatable"
|
||||
typedef struct dir_data {
|
||||
int closed;
|
||||
#ifdef _WIN32
|
||||
intptr_t hFile;
|
||||
char pattern[MAX_PATH+1];
|
||||
#else
|
||||
DIR *dir;
|
||||
#endif
|
||||
} dir_data;
|
||||
|
||||
#define LOCK_METATABLE "lock metatable"
|
||||
|
||||
#ifdef _WIN32
|
||||
#ifdef __BORLANDC__
|
||||
#define lfs_setmode(file, m) (setmode(_fileno(file), m))
|
||||
#define STAT_STRUCT struct stati64
|
||||
#else
|
||||
#define lfs_setmode(file, m) (_setmode(_fileno(file), m))
|
||||
#define STAT_STRUCT struct _stati64
|
||||
#endif
|
||||
#define STAT_FUNC _stati64
|
||||
#define LSTAT_FUNC STAT_FUNC
|
||||
#else
|
||||
#define _O_TEXT 0
|
||||
#define _O_BINARY 0
|
||||
#define lfs_setmode(file, m) ((void)file, (void)m, 0)
|
||||
#define STAT_STRUCT struct stat
|
||||
#define STAT_FUNC stat
|
||||
#define LSTAT_FUNC lstat
|
||||
#endif
|
||||
|
||||
/*
|
||||
** Utility functions
|
||||
*/
|
||||
static int pusherror(lua_State *L, const char *info)
|
||||
{
|
||||
lua_pushnil(L);
|
||||
if (info==NULL)
|
||||
lua_pushstring(L, strerror(errno));
|
||||
else
|
||||
lua_pushfstring(L, "%s: %s", info, strerror(errno));
|
||||
lua_pushinteger(L, errno);
|
||||
return 3;
|
||||
}
|
||||
|
||||
static int pushresult(lua_State *L, int i, const char *info)
|
||||
{
|
||||
if (i==-1)
|
||||
return pusherror(L, info);
|
||||
lua_pushinteger(L, i);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** This function changes the working (current) directory
|
||||
*/
|
||||
static int change_dir (lua_State *L) {
|
||||
const char *path = luaL_checkstring(L, 1);
|
||||
if (chdir(path)) {
|
||||
lua_pushnil (L);
|
||||
lua_pushfstring (L,"Unable to change working directory to '%s'\n%s\n",
|
||||
path, chdir_error);
|
||||
return 2;
|
||||
} else {
|
||||
lua_pushboolean (L, 1);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
** This function returns the current directory
|
||||
** If unable to get the current directory, it returns nil
|
||||
** and a string describing the error
|
||||
*/
|
||||
static int get_dir (lua_State *L) {
|
||||
#ifdef NO_GETCWD
|
||||
lua_pushnil(L);
|
||||
lua_pushstring(L, "Function 'getcwd' not provided by system");
|
||||
return 2;
|
||||
#else
|
||||
char *path = NULL;
|
||||
/* Passing (NULL, 0) is not guaranteed to work. Use a temp buffer and size instead. */
|
||||
size_t size = LFS_MAXPATHLEN; /* initial buffer size */
|
||||
int result;
|
||||
while (1) {
|
||||
path = realloc(path, size);
|
||||
if (!path) /* failed to allocate */
|
||||
return pusherror(L, "get_dir realloc() failed");
|
||||
if (getcwd(path, size) != NULL) {
|
||||
/* success, push the path to the Lua stack */
|
||||
lua_pushstring(L, path);
|
||||
result = 1;
|
||||
break;
|
||||
}
|
||||
if (errno != ERANGE) { /* unexpected error */
|
||||
result = pusherror(L, "get_dir getcwd() failed");
|
||||
break;
|
||||
}
|
||||
/* ERANGE = insufficient buffer capacity, double size and retry */
|
||||
size *= 2;
|
||||
}
|
||||
free(path);
|
||||
return result;
|
||||
#endif
|
||||
}
|
||||
|
||||
/*
|
||||
** Check if the given element on the stack is a file and returns it.
|
||||
*/
|
||||
static FILE *check_file (lua_State *L, int idx, const char *funcname) {
|
||||
#if LUA_VERSION_NUM == 501
|
||||
FILE **fh = (FILE **)luaL_checkudata (L, idx, "FILE*");
|
||||
if (*fh == NULL) {
|
||||
luaL_error (L, "%s: closed file", funcname);
|
||||
return 0;
|
||||
} else
|
||||
return *fh;
|
||||
#elif LUA_VERSION_NUM >= 502 && LUA_VERSION_NUM <= 503
|
||||
luaL_Stream *fh = (luaL_Stream *)luaL_checkudata (L, idx, "FILE*");
|
||||
if (fh->closef == 0 || fh->f == NULL) {
|
||||
luaL_error (L, "%s: closed file", funcname);
|
||||
return 0;
|
||||
} else
|
||||
return fh->f;
|
||||
#else
|
||||
#error unsupported Lua version
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
**
|
||||
*/
|
||||
static int _file_lock (lua_State *L, FILE *fh, const char *mode, const long start, long len, const char *funcname) {
|
||||
int code;
|
||||
#ifdef _WIN32
|
||||
/* lkmode valid values are:
|
||||
LK_LOCK Locks the specified bytes. If the bytes cannot be locked, the program immediately tries again after 1 second. If, after 10 attempts, the bytes cannot be locked, the constant returns an error.
|
||||
LK_NBLCK Locks the specified bytes. If the bytes cannot be locked, the constant returns an error.
|
||||
LK_NBRLCK Same as _LK_NBLCK.
|
||||
LK_RLCK Same as _LK_LOCK.
|
||||
LK_UNLCK Unlocks the specified bytes, which must have been previously locked.
|
||||
|
||||
Regions should be locked only briefly and should be unlocked before closing a file or exiting the program.
|
||||
|
||||
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt__locking.asp
|
||||
*/
|
||||
int lkmode;
|
||||
switch (*mode) {
|
||||
case 'r': lkmode = LK_NBLCK; break;
|
||||
case 'w': lkmode = LK_NBLCK; break;
|
||||
case 'u': lkmode = LK_UNLCK; break;
|
||||
default : return luaL_error (L, "%s: invalid mode", funcname);
|
||||
}
|
||||
if (!len) {
|
||||
fseek (fh, 0L, SEEK_END);
|
||||
len = ftell (fh);
|
||||
}
|
||||
fseek (fh, start, SEEK_SET);
|
||||
#ifdef __BORLANDC__
|
||||
code = locking (fileno(fh), lkmode, len);
|
||||
#else
|
||||
code = _locking (fileno(fh), lkmode, len);
|
||||
#endif
|
||||
#else
|
||||
struct flock f;
|
||||
switch (*mode) {
|
||||
case 'w': f.l_type = F_WRLCK; break;
|
||||
case 'r': f.l_type = F_RDLCK; break;
|
||||
case 'u': f.l_type = F_UNLCK; break;
|
||||
default : return luaL_error (L, "%s: invalid mode", funcname);
|
||||
}
|
||||
f.l_whence = SEEK_SET;
|
||||
f.l_start = (off_t)start;
|
||||
f.l_len = (off_t)len;
|
||||
code = fcntl (fileno(fh), F_SETLK, &f);
|
||||
#endif
|
||||
return (code != -1);
|
||||
}
|
||||
|
||||
#ifdef _WIN32
|
||||
typedef struct lfs_Lock {
|
||||
HANDLE fd;
|
||||
} lfs_Lock;
|
||||
static int lfs_lock_dir(lua_State *L) {
|
||||
size_t pathl; HANDLE fd;
|
||||
lfs_Lock *lock;
|
||||
char *ln;
|
||||
const char *lockfile = "/lockfile.lfs";
|
||||
const char *path = luaL_checklstring(L, 1, &pathl);
|
||||
ln = (char*)malloc(pathl + strlen(lockfile) + 1);
|
||||
if(!ln) {
|
||||
lua_pushnil(L); lua_pushstring(L, strerror(errno)); return 2;
|
||||
}
|
||||
strcpy(ln, path); strcat(ln, lockfile);
|
||||
if((fd = CreateFile(ln, GENERIC_WRITE, 0, NULL, CREATE_NEW,
|
||||
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_DELETE_ON_CLOSE, NULL)) == INVALID_HANDLE_VALUE) {
|
||||
int en = GetLastError();
|
||||
free(ln); lua_pushnil(L);
|
||||
if(en == ERROR_FILE_EXISTS || en == ERROR_SHARING_VIOLATION)
|
||||
lua_pushstring(L, "File exists");
|
||||
else
|
||||
lua_pushstring(L, strerror(en));
|
||||
return 2;
|
||||
}
|
||||
free(ln);
|
||||
lock = (lfs_Lock*)lua_newuserdata(L, sizeof(lfs_Lock));
|
||||
lock->fd = fd;
|
||||
luaL_getmetatable (L, LOCK_METATABLE);
|
||||
lua_setmetatable (L, -2);
|
||||
return 1;
|
||||
}
|
||||
static int lfs_unlock_dir(lua_State *L) {
|
||||
lfs_Lock *lock = (lfs_Lock *)luaL_checkudata(L, 1, LOCK_METATABLE);
|
||||
if(lock->fd != INVALID_HANDLE_VALUE) {
|
||||
CloseHandle(lock->fd);
|
||||
lock->fd=INVALID_HANDLE_VALUE;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
typedef struct lfs_Lock {
|
||||
char *ln;
|
||||
} lfs_Lock;
|
||||
static int lfs_lock_dir(lua_State *L) {
|
||||
lfs_Lock *lock;
|
||||
size_t pathl;
|
||||
char *ln;
|
||||
const char *lockfile = "/lockfile.lfs";
|
||||
const char *path = luaL_checklstring(L, 1, &pathl);
|
||||
lock = (lfs_Lock*)lua_newuserdata(L, sizeof(lfs_Lock));
|
||||
ln = (char*)malloc(pathl + strlen(lockfile) + 1);
|
||||
if(!ln) {
|
||||
lua_pushnil(L); lua_pushstring(L, strerror(errno)); return 2;
|
||||
}
|
||||
strcpy(ln, path); strcat(ln, lockfile);
|
||||
if(symlink("lock", ln) == -1) {
|
||||
free(ln); lua_pushnil(L);
|
||||
lua_pushstring(L, strerror(errno)); return 2;
|
||||
}
|
||||
lock->ln = ln;
|
||||
luaL_getmetatable (L, LOCK_METATABLE);
|
||||
lua_setmetatable (L, -2);
|
||||
return 1;
|
||||
}
|
||||
static int lfs_unlock_dir(lua_State *L) {
|
||||
lfs_Lock *lock = (lfs_Lock *)luaL_checkudata(L, 1, LOCK_METATABLE);
|
||||
if(lock->ln) {
|
||||
unlink(lock->ln);
|
||||
free(lock->ln);
|
||||
lock->ln = NULL;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int lfs_g_setmode (lua_State *L, FILE *f, int arg) {
|
||||
static const int mode[] = {_O_BINARY, _O_TEXT};
|
||||
static const char *const modenames[] = {"binary", "text", NULL};
|
||||
int op = luaL_checkoption(L, arg, NULL, modenames);
|
||||
int res = lfs_setmode(f, mode[op]);
|
||||
if (res != -1) {
|
||||
int i;
|
||||
lua_pushboolean(L, 1);
|
||||
for (i = 0; modenames[i] != NULL; i++) {
|
||||
if (mode[i] == res) {
|
||||
lua_pushstring(L, modenames[i]);
|
||||
return 2;
|
||||
}
|
||||
}
|
||||
lua_pushnil(L);
|
||||
return 2;
|
||||
} else {
|
||||
return pusherror(L, NULL);
|
||||
}
|
||||
}
|
||||
|
||||
static int lfs_f_setmode(lua_State *L) {
|
||||
return lfs_g_setmode(L, check_file(L, 1, "setmode"), 2);
|
||||
}
|
||||
|
||||
/*
|
||||
** Locks a file.
|
||||
** @param #1 File handle.
|
||||
** @param #2 String with lock mode ('w'rite, 'r'ead).
|
||||
** @param #3 Number with start position (optional).
|
||||
** @param #4 Number with length (optional).
|
||||
*/
|
||||
static int file_lock (lua_State *L) {
|
||||
FILE *fh = check_file (L, 1, "lock");
|
||||
const char *mode = luaL_checkstring (L, 2);
|
||||
const long start = (long) luaL_optinteger (L, 3, 0);
|
||||
long len = (long) luaL_optinteger (L, 4, 0);
|
||||
if (_file_lock (L, fh, mode, start, len, "lock")) {
|
||||
lua_pushboolean (L, 1);
|
||||
return 1;
|
||||
} else {
|
||||
lua_pushnil (L);
|
||||
lua_pushfstring (L, "%s", strerror(errno));
|
||||
return 2;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Unlocks a file.
|
||||
** @param #1 File handle.
|
||||
** @param #2 Number with start position (optional).
|
||||
** @param #3 Number with length (optional).
|
||||
*/
|
||||
static int file_unlock (lua_State *L) {
|
||||
FILE *fh = check_file (L, 1, "unlock");
|
||||
const long start = (long) luaL_optinteger (L, 2, 0);
|
||||
long len = (long) luaL_optinteger (L, 3, 0);
|
||||
if (_file_lock (L, fh, "u", start, len, "unlock")) {
|
||||
lua_pushboolean (L, 1);
|
||||
return 1;
|
||||
} else {
|
||||
lua_pushnil (L);
|
||||
lua_pushfstring (L, "%s", strerror(errno));
|
||||
return 2;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Creates a link.
|
||||
** @param #1 Object to link to.
|
||||
** @param #2 Name of link.
|
||||
** @param #3 True if link is symbolic (optional).
|
||||
*/
|
||||
static int make_link(lua_State *L)
|
||||
{
|
||||
#ifndef _WIN32
|
||||
const char *oldpath = luaL_checkstring(L, 1);
|
||||
const char *newpath = luaL_checkstring(L, 2);
|
||||
return pushresult(L,
|
||||
(lua_toboolean(L,3) ? symlink : link)(oldpath, newpath), NULL);
|
||||
#else
|
||||
errno = ENOSYS; /* = "Function not implemented" */
|
||||
return pushresult(L, -1, "make_link is not supported on Windows");
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Creates a directory.
|
||||
** @param #1 Directory path.
|
||||
*/
|
||||
static int make_dir (lua_State *L) {
|
||||
const char *path = luaL_checkstring (L, 1);
|
||||
int fail;
|
||||
#ifdef _WIN32
|
||||
fail = _mkdir (path);
|
||||
#else
|
||||
fail = mkdir (path, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP |
|
||||
S_IWGRP | S_IXGRP | S_IROTH | S_IXOTH );
|
||||
#endif
|
||||
if (fail) {
|
||||
lua_pushnil (L);
|
||||
lua_pushfstring (L, "%s", strerror(errno));
|
||||
return 2;
|
||||
}
|
||||
lua_pushboolean (L, 1);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Removes a directory.
|
||||
** @param #1 Directory path.
|
||||
*/
|
||||
static int remove_dir (lua_State *L) {
|
||||
const char *path = luaL_checkstring (L, 1);
|
||||
int fail;
|
||||
|
||||
fail = rmdir (path);
|
||||
|
||||
if (fail) {
|
||||
lua_pushnil (L);
|
||||
lua_pushfstring (L, "%s", strerror(errno));
|
||||
return 2;
|
||||
}
|
||||
lua_pushboolean (L, 1);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Directory iterator
|
||||
*/
|
||||
static int dir_iter (lua_State *L) {
|
||||
#ifdef _WIN32
|
||||
struct _finddata_t c_file;
|
||||
#else
|
||||
struct dirent *entry;
|
||||
#endif
|
||||
dir_data *d = (dir_data *)luaL_checkudata (L, 1, DIR_METATABLE);
|
||||
luaL_argcheck (L, d->closed == 0, 1, "closed directory");
|
||||
#ifdef _WIN32
|
||||
if (d->hFile == 0L) { /* first entry */
|
||||
if ((d->hFile = _findfirst (d->pattern, &c_file)) == -1L) {
|
||||
lua_pushnil (L);
|
||||
lua_pushstring (L, strerror (errno));
|
||||
d->closed = 1;
|
||||
return 2;
|
||||
} else {
|
||||
lua_pushstring (L, c_file.name);
|
||||
return 1;
|
||||
}
|
||||
} else { /* next entry */
|
||||
if (_findnext (d->hFile, &c_file) == -1L) {
|
||||
/* no more entries => close directory */
|
||||
_findclose (d->hFile);
|
||||
d->closed = 1;
|
||||
return 0;
|
||||
} else {
|
||||
lua_pushstring (L, c_file.name);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
#else
|
||||
if ((entry = readdir (d->dir)) != NULL) {
|
||||
lua_pushstring (L, entry->d_name);
|
||||
return 1;
|
||||
} else {
|
||||
/* no more entries => close directory */
|
||||
closedir (d->dir);
|
||||
d->closed = 1;
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Closes directory iterators
|
||||
*/
|
||||
static int dir_close (lua_State *L) {
|
||||
dir_data *d = (dir_data *)lua_touserdata (L, 1);
|
||||
#ifdef _WIN32
|
||||
if (!d->closed && d->hFile) {
|
||||
_findclose (d->hFile);
|
||||
}
|
||||
#else
|
||||
if (!d->closed && d->dir) {
|
||||
closedir (d->dir);
|
||||
}
|
||||
#endif
|
||||
d->closed = 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Factory of directory iterators
|
||||
*/
|
||||
static int dir_iter_factory (lua_State *L) {
|
||||
const char *path = luaL_checkstring (L, 1);
|
||||
dir_data *d;
|
||||
lua_pushcfunction (L, dir_iter);
|
||||
d = (dir_data *) lua_newuserdata (L, sizeof(dir_data));
|
||||
luaL_getmetatable (L, DIR_METATABLE);
|
||||
lua_setmetatable (L, -2);
|
||||
d->closed = 0;
|
||||
#ifdef _WIN32
|
||||
d->hFile = 0L;
|
||||
if (strlen(path) > MAX_PATH-2)
|
||||
luaL_error (L, "path too long: %s", path);
|
||||
else
|
||||
sprintf (d->pattern, "%s/*", path);
|
||||
#else
|
||||
d->dir = opendir (path);
|
||||
if (d->dir == NULL)
|
||||
luaL_error (L, "cannot open %s: %s", path, strerror (errno));
|
||||
#endif
|
||||
return 2;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Creates directory metatable.
|
||||
*/
|
||||
static int dir_create_meta (lua_State *L) {
|
||||
luaL_newmetatable (L, DIR_METATABLE);
|
||||
|
||||
/* Method table */
|
||||
lua_newtable(L);
|
||||
lua_pushcfunction (L, dir_iter);
|
||||
lua_setfield(L, -2, "next");
|
||||
lua_pushcfunction (L, dir_close);
|
||||
lua_setfield(L, -2, "close");
|
||||
|
||||
/* Metamethods */
|
||||
lua_setfield(L, -2, "__index");
|
||||
lua_pushcfunction (L, dir_close);
|
||||
lua_setfield (L, -2, "__gc");
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Creates lock metatable.
|
||||
*/
|
||||
static int lock_create_meta (lua_State *L) {
|
||||
luaL_newmetatable (L, LOCK_METATABLE);
|
||||
|
||||
/* Method table */
|
||||
lua_newtable(L);
|
||||
lua_pushcfunction(L, lfs_unlock_dir);
|
||||
lua_setfield(L, -2, "free");
|
||||
|
||||
/* Metamethods */
|
||||
lua_setfield(L, -2, "__index");
|
||||
lua_pushcfunction(L, lfs_unlock_dir);
|
||||
lua_setfield(L, -2, "__gc");
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
#ifdef _WIN32
|
||||
#ifndef S_ISDIR
|
||||
#define S_ISDIR(mode) (mode&_S_IFDIR)
|
||||
#endif
|
||||
#ifndef S_ISREG
|
||||
#define S_ISREG(mode) (mode&_S_IFREG)
|
||||
#endif
|
||||
#ifndef S_ISLNK
|
||||
#define S_ISLNK(mode) (0)
|
||||
#endif
|
||||
#ifndef S_ISSOCK
|
||||
#define S_ISSOCK(mode) (0)
|
||||
#endif
|
||||
#ifndef S_ISFIFO
|
||||
#define S_ISFIFO(mode) (0)
|
||||
#endif
|
||||
#ifndef S_ISCHR
|
||||
#define S_ISCHR(mode) (mode&_S_IFCHR)
|
||||
#endif
|
||||
#ifndef S_ISBLK
|
||||
#define S_ISBLK(mode) (0)
|
||||
#endif
|
||||
#endif
|
||||
/*
|
||||
** Convert the inode protection mode to a string.
|
||||
*/
|
||||
#ifdef _WIN32
|
||||
static const char *mode2string (unsigned short mode) {
|
||||
#else
|
||||
static const char *mode2string (mode_t mode) {
|
||||
#endif
|
||||
if ( S_ISREG(mode) )
|
||||
return "file";
|
||||
else if ( S_ISDIR(mode) )
|
||||
return "directory";
|
||||
else if ( S_ISLNK(mode) )
|
||||
return "link";
|
||||
else if ( S_ISSOCK(mode) )
|
||||
return "socket";
|
||||
else if ( S_ISFIFO(mode) )
|
||||
return "named pipe";
|
||||
else if ( S_ISCHR(mode) )
|
||||
return "char device";
|
||||
else if ( S_ISBLK(mode) )
|
||||
return "block device";
|
||||
else
|
||||
return "other";
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Set access time and modification values for file
|
||||
*/
|
||||
static int file_utime (lua_State *L) {
|
||||
const char *file = luaL_checkstring (L, 1);
|
||||
struct utimbuf utb, *buf;
|
||||
|
||||
if (lua_gettop (L) == 1) /* set to current date/time */
|
||||
buf = NULL;
|
||||
else {
|
||||
utb.actime = (time_t)luaL_optnumber (L, 2, 0);
|
||||
utb.modtime = (time_t) luaL_optinteger (L, 3, utb.actime);
|
||||
buf = &utb;
|
||||
}
|
||||
if (utime (file, buf)) {
|
||||
lua_pushnil (L);
|
||||
lua_pushfstring (L, "%s", strerror (errno));
|
||||
return 2;
|
||||
}
|
||||
lua_pushboolean (L, 1);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/* inode protection mode */
|
||||
static void push_st_mode (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushstring (L, mode2string (info->st_mode));
|
||||
}
|
||||
/* device inode resides on */
|
||||
static void push_st_dev (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushinteger (L, (lua_Integer) info->st_dev);
|
||||
}
|
||||
/* inode's number */
|
||||
static void push_st_ino (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushinteger (L, (lua_Integer) info->st_ino);
|
||||
}
|
||||
/* number of hard links to the file */
|
||||
static void push_st_nlink (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushinteger (L, (lua_Integer)info->st_nlink);
|
||||
}
|
||||
/* user-id of owner */
|
||||
static void push_st_uid (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushinteger (L, (lua_Integer)info->st_uid);
|
||||
}
|
||||
/* group-id of owner */
|
||||
static void push_st_gid (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushinteger (L, (lua_Integer)info->st_gid);
|
||||
}
|
||||
/* device type, for special file inode */
|
||||
static void push_st_rdev (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushinteger (L, (lua_Integer) info->st_rdev);
|
||||
}
|
||||
/* time of last access */
|
||||
static void push_st_atime (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushinteger (L, (lua_Integer) info->st_atime);
|
||||
}
|
||||
/* time of last data modification */
|
||||
static void push_st_mtime (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushinteger (L, (lua_Integer) info->st_mtime);
|
||||
}
|
||||
/* time of last file status change */
|
||||
static void push_st_ctime (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushinteger (L, (lua_Integer) info->st_ctime);
|
||||
}
|
||||
/* file size, in bytes */
|
||||
static void push_st_size (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushinteger (L, (lua_Integer)info->st_size);
|
||||
}
|
||||
#ifndef _WIN32
|
||||
/* blocks allocated for file */
|
||||
static void push_st_blocks (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushinteger (L, (lua_Integer)info->st_blocks);
|
||||
}
|
||||
/* optimal file system I/O blocksize */
|
||||
static void push_st_blksize (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushinteger (L, (lua_Integer)info->st_blksize);
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
** Convert the inode protection mode to a permission list.
|
||||
*/
|
||||
|
||||
#ifdef _WIN32
|
||||
static const char *perm2string (unsigned short mode) {
|
||||
static char perms[10] = "---------";
|
||||
int i;
|
||||
for (i=0;i<9;i++) perms[i]='-';
|
||||
if (mode & _S_IREAD)
|
||||
{ perms[0] = 'r'; perms[3] = 'r'; perms[6] = 'r'; }
|
||||
if (mode & _S_IWRITE)
|
||||
{ perms[1] = 'w'; perms[4] = 'w'; perms[7] = 'w'; }
|
||||
if (mode & _S_IEXEC)
|
||||
{ perms[2] = 'x'; perms[5] = 'x'; perms[8] = 'x'; }
|
||||
return perms;
|
||||
}
|
||||
#else
|
||||
static const char *perm2string (mode_t mode) {
|
||||
static char perms[10] = "---------";
|
||||
int i;
|
||||
for (i=0;i<9;i++) perms[i]='-';
|
||||
if (mode & S_IRUSR) perms[0] = 'r';
|
||||
if (mode & S_IWUSR) perms[1] = 'w';
|
||||
if (mode & S_IXUSR) perms[2] = 'x';
|
||||
if (mode & S_IRGRP) perms[3] = 'r';
|
||||
if (mode & S_IWGRP) perms[4] = 'w';
|
||||
if (mode & S_IXGRP) perms[5] = 'x';
|
||||
if (mode & S_IROTH) perms[6] = 'r';
|
||||
if (mode & S_IWOTH) perms[7] = 'w';
|
||||
if (mode & S_IXOTH) perms[8] = 'x';
|
||||
return perms;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* permssions string */
|
||||
static void push_st_perm (lua_State *L, STAT_STRUCT *info) {
|
||||
lua_pushstring (L, perm2string (info->st_mode));
|
||||
}
|
||||
|
||||
typedef void (*_push_function) (lua_State *L, STAT_STRUCT *info);
|
||||
|
||||
struct _stat_members {
|
||||
const char *name;
|
||||
_push_function push;
|
||||
};
|
||||
|
||||
struct _stat_members members[] = {
|
||||
{ "mode", push_st_mode },
|
||||
{ "dev", push_st_dev },
|
||||
{ "ino", push_st_ino },
|
||||
{ "nlink", push_st_nlink },
|
||||
{ "uid", push_st_uid },
|
||||
{ "gid", push_st_gid },
|
||||
{ "rdev", push_st_rdev },
|
||||
{ "access", push_st_atime },
|
||||
{ "modification", push_st_mtime },
|
||||
{ "change", push_st_ctime },
|
||||
{ "size", push_st_size },
|
||||
{ "permissions", push_st_perm },
|
||||
#ifndef _WIN32
|
||||
{ "blocks", push_st_blocks },
|
||||
{ "blksize", push_st_blksize },
|
||||
#endif
|
||||
{ NULL, NULL }
|
||||
};
|
||||
|
||||
/*
|
||||
** Get file or symbolic link information
|
||||
*/
|
||||
static int _file_info_ (lua_State *L, int (*st)(const char*, STAT_STRUCT*)) {
|
||||
STAT_STRUCT info;
|
||||
const char *file = luaL_checkstring (L, 1);
|
||||
int i;
|
||||
|
||||
if (st(file, &info)) {
|
||||
lua_pushnil(L);
|
||||
lua_pushfstring(L, "cannot obtain information from file '%s': %s", file, strerror(errno));
|
||||
return 2;
|
||||
}
|
||||
if (lua_isstring (L, 2)) {
|
||||
const char *member = lua_tostring (L, 2);
|
||||
for (i = 0; members[i].name; i++) {
|
||||
if (strcmp(members[i].name, member) == 0) {
|
||||
/* push member value and return */
|
||||
members[i].push (L, &info);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
/* member not found */
|
||||
return luaL_error(L, "invalid attribute name '%s'", member);
|
||||
}
|
||||
/* creates a table if none is given, removes extra arguments */
|
||||
lua_settop(L, 2);
|
||||
if (!lua_istable (L, 2)) {
|
||||
lua_newtable (L);
|
||||
}
|
||||
/* stores all members in table on top of the stack */
|
||||
for (i = 0; members[i].name; i++) {
|
||||
lua_pushstring (L, members[i].name);
|
||||
members[i].push (L, &info);
|
||||
lua_rawset (L, -3);
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Get file information using stat.
|
||||
*/
|
||||
static int file_info (lua_State *L) {
|
||||
return _file_info_ (L, STAT_FUNC);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Push the symlink target to the top of the stack.
|
||||
** Assumes the file name is at position 1 of the stack.
|
||||
** Returns 1 if successful (with the target on top of the stack),
|
||||
** 0 on failure (with stack unchanged, and errno set).
|
||||
*/
|
||||
static int push_link_target(lua_State *L) {
|
||||
#ifdef _WIN32
|
||||
errno = ENOSYS;
|
||||
return 0;
|
||||
#else
|
||||
const char *file = luaL_checkstring(L, 1);
|
||||
char *target = NULL;
|
||||
int tsize, size = 256; /* size = initial buffer capacity */
|
||||
while (1) {
|
||||
target = realloc(target, size);
|
||||
if (!target) /* failed to allocate */
|
||||
return 0;
|
||||
tsize = readlink(file, target, size);
|
||||
if (tsize < 0) { /* a readlink() error occurred */
|
||||
free(target);
|
||||
return 0;
|
||||
}
|
||||
if (tsize < size)
|
||||
break;
|
||||
/* possibly truncated readlink() result, double size and retry */
|
||||
size *= 2;
|
||||
}
|
||||
target[tsize] = '\0';
|
||||
lua_pushlstring(L, target, tsize);
|
||||
free(target);
|
||||
return 1;
|
||||
#endif
|
||||
}
|
||||
|
||||
/*
|
||||
** Get symbolic link information using lstat.
|
||||
*/
|
||||
static int link_info (lua_State *L) {
|
||||
int ret;
|
||||
if (lua_isstring (L, 2) && (strcmp(lua_tostring(L, 2), "target") == 0)) {
|
||||
int ok = push_link_target(L);
|
||||
return ok ? 1 : pusherror(L, "could not obtain link target");
|
||||
}
|
||||
ret = _file_info_ (L, LSTAT_FUNC);
|
||||
if (ret == 1 && lua_type(L, -1) == LUA_TTABLE) {
|
||||
int ok = push_link_target(L);
|
||||
if (ok) {
|
||||
lua_setfield(L, -2, "target");
|
||||
}
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Assumes the table is on top of the stack.
|
||||
*/
|
||||
static void set_info (lua_State *L) {
|
||||
lua_pushliteral(L, "Copyright (C) 2003-2016 Kepler Project");
|
||||
lua_setfield(L, -2, "_COPYRIGHT");
|
||||
lua_pushliteral(L, "LuaFileSystem is a Lua library developed to complement the set of functions related to file systems offered by the standard Lua distribution");
|
||||
lua_setfield(L, -2, "_DESCRIPTION");
|
||||
lua_pushliteral(L, "LuaFileSystem " LFS_VERSION);
|
||||
lua_setfield(L, -2, "_VERSION");
|
||||
}
|
||||
|
||||
|
||||
static const struct luaL_Reg fslib[] = {
|
||||
{"attributes", file_info},
|
||||
{"chdir", change_dir},
|
||||
{"currentdir", get_dir},
|
||||
{"dir", dir_iter_factory},
|
||||
{"link", make_link},
|
||||
{"lock", file_lock},
|
||||
{"mkdir", make_dir},
|
||||
{"rmdir", remove_dir},
|
||||
{"symlinkattributes", link_info},
|
||||
{"setmode", lfs_f_setmode},
|
||||
{"touch", file_utime},
|
||||
{"unlock", file_unlock},
|
||||
{"lock_dir", lfs_lock_dir},
|
||||
{NULL, NULL},
|
||||
};
|
||||
|
||||
LFS_EXPORT int luaopen_lfs (lua_State *L) {
|
||||
dir_create_meta (L);
|
||||
lock_create_meta (L);
|
||||
luaL_newlib (L, fslib);
|
||||
lua_pushvalue(L, -1);
|
||||
lua_setglobal(L, LFS_LIBNAME);
|
||||
set_info (L);
|
||||
return 1;
|
||||
}
|
|
@ -0,0 +1,713 @@
|
|||
----------------------------------------------
|
||||
-- LuaMacro 2, a macro-preprocessor for Lua.
|
||||
-- Unlike LuaMacro 1.x, it does not depend on the token-filter patch and generates
|
||||
-- Lua code which can be printed out or compiled directly. C-style macros are easy, but LM2
|
||||
-- allows for macros that can read their own input and generate output using Lua code.
|
||||
-- New in this release are lexically-scoped macros.
|
||||
-- The Lua Lpeg Lexer is by Peter Odding.
|
||||
--
|
||||
-- Examples:
|
||||
--
|
||||
-- macro.define 'sqr(x) ((x)*(x))'
|
||||
-- macro.define 'assert_(expr) assert(expr,_STR_(expr))'
|
||||
-- macro.define('R(n)',function(n)
|
||||
-- n = n:get_number()
|
||||
-- return ('-'):rep(n)
|
||||
-- end
|
||||
-- macro.define('lazy',function(get)
|
||||
-- get() -- skip space
|
||||
-- local expr,endt = get:upto(function(t,v)
|
||||
-- return t == ',' or t == ')' or t == ';'
|
||||
-- or (t=='space' and v:match '\n')
|
||||
-- end)
|
||||
-- return 'function(_) return '..tostring(expr)..' end'..tostring(endt)
|
||||
-- end)
|
||||
--
|
||||
--
|
||||
-- @author Steve Donovan
|
||||
-- @copyright 2011
|
||||
-- @license MIT/X11
|
||||
-- @module macro
|
||||
-- @alias M
|
||||
|
||||
local macro = {}
|
||||
local M = macro
|
||||
local lexer = require 'macro.lexer'
|
||||
local Getter = require 'macro.Getter'
|
||||
local TokenList = require 'macro.TokenList'
|
||||
local scan_code = lexer.scan_lua
|
||||
local append = table.insert
|
||||
local setmetatable = setmetatable
|
||||
|
||||
--local tdump = require 'pl.pretty'.dump
|
||||
|
||||
local scan_iter, tnext = Getter.scan_iter, Getter.next
|
||||
|
||||
|
||||
M.upto_keywords = Getter.upto_keywords
|
||||
M.Putter = TokenList.new
|
||||
|
||||
-- given a token list, a set of formal arguments and the actual arguments,
|
||||
-- return a new token list where the formal arguments have been replaced
|
||||
-- by the actual arguments
|
||||
local function substitute_tokenlist (tl,parms,args)
|
||||
local append,put_tokens = table.insert,TokenList.tokens
|
||||
local parm_map = {}
|
||||
for i,name in ipairs(parms) do
|
||||
parm_map[name] = args[i]
|
||||
end
|
||||
local res = {}
|
||||
for _,tv in ipairs(tl) do
|
||||
local t,v = tv[1],tv[2]
|
||||
if t == 'iden' then
|
||||
local pval = parm_map[v]
|
||||
if pval then
|
||||
put_tokens(res,pval)
|
||||
else
|
||||
append(res,tv)
|
||||
end
|
||||
else
|
||||
append(res,tv)
|
||||
end
|
||||
end
|
||||
return res
|
||||
end
|
||||
|
||||
----------------
|
||||
-- Defining and Working with Macros.
|
||||
-- @section macros
|
||||
|
||||
--- make a copy of a list of tokens.
|
||||
-- @param tok the list
|
||||
-- @param pred copy up to this condition; if defined, must be a function
|
||||
-- of two arguments, the token type and the token value.
|
||||
-- @return the copy
|
||||
-- @return the token that matched the predicate
|
||||
function M.copy_tokens(tok,pred)
|
||||
local res = {}
|
||||
local t,v = tok()
|
||||
while t and not (pred and pred(t,v)) do
|
||||
append(res,{t,v})
|
||||
t,v = tok()
|
||||
end
|
||||
return res,{t,v}
|
||||
end
|
||||
|
||||
---- define new lexical tokens.
|
||||
-- @param extra a list of strings defining the new tokens
|
||||
-- @usage macro.define_tokens{'{|'}
|
||||
function M.define_tokens(extra)
|
||||
lexer.add_extra_tokens(extra)
|
||||
end
|
||||
|
||||
local imacros,smacros = {},{}
|
||||
|
||||
M.macro_table = imacros
|
||||
|
||||
--- define a macro using a specification string and optional function.
|
||||
-- The specification looks very much like a C preprocessor macro: the name,
|
||||
-- followed by an optional formal argument list (_no_ space after name!) and
|
||||
-- the substitution. e.g `answer 42` or `sqr(x) ((x)*(x))`
|
||||
--
|
||||
-- If there is no substitution, then the second argument must be a function which
|
||||
-- will be evaluated for the actual substitution. If there are explicit parameters, then they will be passed as token lists. Otherwise, the function is passed a `get` and a `put` argument, which are `Getter` and `TokenList` objects.
|
||||
--
|
||||
-- The substitution function may return a `TokenList` object, or a string.
|
||||
-- @param macstr
|
||||
-- @param subst_fn the optional substitution function
|
||||
-- @see macro.Getter, macro.TokenList
|
||||
function M.define(macstr,subst_fn)
|
||||
local tok,t,macname,parms,parm_map
|
||||
local mtbl
|
||||
tok = scan_code(macstr)
|
||||
t,macname = tok()
|
||||
if t == 'iden' then mtbl = imacros
|
||||
elseif t ~= 'string' and t ~= 'number' and t ~= 'keyword' then
|
||||
mtbl = smacros
|
||||
else
|
||||
error("a macro cannot be of type "..t)
|
||||
end
|
||||
t = tok()
|
||||
if t == '(' then
|
||||
parms = Getter.new(tok):idens()
|
||||
end
|
||||
mtbl[macname] = {
|
||||
name = macname,
|
||||
subst = subst_fn or M.copy_tokens(tok),
|
||||
parms = parms
|
||||
}
|
||||
end
|
||||
|
||||
--- define a macro using a function and a parameter list.
|
||||
-- @param name either an identifier or an operator.
|
||||
-- @param subst a function
|
||||
-- @param parms a list of parameter names
|
||||
-- @return the existing value of this macro, if any
|
||||
function M.set_macro(name,subst,parms)
|
||||
local macros
|
||||
if name:match '^[_%a][_%w]*$' then
|
||||
macros = imacros
|
||||
else
|
||||
macros = smacros
|
||||
end
|
||||
if subst == nil then
|
||||
macros[name] = nil
|
||||
return
|
||||
end
|
||||
local last = macros[name]
|
||||
if type(subst) ~= 'table' or not subst.name then
|
||||
subst = {
|
||||
name = name,
|
||||
subst = subst,
|
||||
parms = parms
|
||||
}
|
||||
end
|
||||
macros[name] = subst
|
||||
return last
|
||||
end
|
||||
|
||||
--- defined a scoped macro. Like define except this macro will not
|
||||
-- be visible outside the current scope.
|
||||
-- @param name either an identifier or an operator.
|
||||
-- @param subst a function
|
||||
-- @param parms a list of parameter names
|
||||
-- @see set_macro
|
||||
function M.define_scoped (name,subst,parms)
|
||||
local old_value = M.set_macro(name,subst,parms)
|
||||
M.block_handler(-1,function()
|
||||
M.set_macro(name,old_value)
|
||||
end)
|
||||
end
|
||||
|
||||
--- get the value of a macro. The macro substitution must either be a
|
||||
-- a string or a single token.
|
||||
-- @param name existing macro name
|
||||
-- @return a string value, or nil if the macro does not exist.
|
||||
function M.get_macro_value(name)
|
||||
local mac = imacros[name]
|
||||
if not mac then return nil end
|
||||
if type(mac.subst) == 'table' then
|
||||
return mac.subst[1][2]
|
||||
else
|
||||
return mac.subst
|
||||
end
|
||||
end
|
||||
|
||||
local function get_macro (mac, no_error)
|
||||
local macro = imacros[mac]
|
||||
if not macro and not no_error then
|
||||
M.error("macro "..mac.." is not defined")
|
||||
end
|
||||
return macro
|
||||
end
|
||||
|
||||
local push,pop = table.insert,table.remove
|
||||
|
||||
--- push a value on the stack associated with a macro.
|
||||
-- @param name macro name
|
||||
-- @param value any value
|
||||
function M.push_macro_stack (name,value)
|
||||
local macro = get_macro(name)
|
||||
macro.stack = macro.stack or {}
|
||||
push(macro.stack,value)
|
||||
end
|
||||
|
||||
--- pop a value from a macro stack.
|
||||
-- @param name macro name
|
||||
-- @return any value, if defined
|
||||
function M.pop_macro_stack (name)
|
||||
local macro = get_macro(name)
|
||||
if macro.stack and #macro.stack > 0 then
|
||||
return pop(macro.stack)
|
||||
end
|
||||
end
|
||||
|
||||
--- value of top of macro stack.
|
||||
-- @param name macro name
|
||||
-- @return any value, if defined
|
||||
function M.value_of_macro_stack (name)
|
||||
local macro = get_macro(name,true)
|
||||
if not macro then return nil end
|
||||
if macro.stack and #macro.stack > 0 then
|
||||
return macro.stack[#macro.stack]
|
||||
end
|
||||
end
|
||||
|
||||
local lua_keywords = {
|
||||
['do'] = 'open', ['then'] = 'open', ['else'] = 'open', ['function'] = 'open',
|
||||
['repeat'] = 'open';
|
||||
['end'] = 'close', ['until'] = 'close',['elseif'] = 'close'
|
||||
}
|
||||
|
||||
local c_keywords = {}
|
||||
local keywords = lua_keywords
|
||||
|
||||
local block_handlers,keyword_handlers = {},{}
|
||||
local level = 1
|
||||
|
||||
--- specify a block handler at a given level.
|
||||
-- a block handler may indicate with an extra true return
|
||||
-- that it wants to persist; it is passed the getter and the keyword
|
||||
-- so we can get more specific end-of-block handlers.
|
||||
-- @param lev relative block level
|
||||
-- @param action will be called when the block reaches the level
|
||||
function M.block_handler (lev,action)
|
||||
lev = lev + level
|
||||
if not block_handlers[lev] then
|
||||
block_handlers[lev] = {}
|
||||
end
|
||||
append(block_handlers[lev],action)
|
||||
end
|
||||
|
||||
local function process_block_handlers(level,get,v)
|
||||
local persist,result
|
||||
for _,bh in pairs(block_handlers[level]) do
|
||||
local res,keep = bh(get,v)
|
||||
if not keep then
|
||||
if res then result = res end
|
||||
else
|
||||
persist = persist or {}
|
||||
append(persist,bh)
|
||||
end
|
||||
end
|
||||
block_handlers[level] = persist
|
||||
return result
|
||||
end
|
||||
|
||||
|
||||
--- set a keyword handler. Unlike macros, the keyword itself is always
|
||||
-- passed through, but the handler may add some output afterwards.
|
||||
-- If the action is nil, then the handler for that keyword is removed.
|
||||
-- @param word keyword
|
||||
-- @param action function to be called when keyword is encountered
|
||||
-- @return previous handler associated with this keyword
|
||||
function M.keyword_handler (word,action)
|
||||
if word == 'BEGIN' or word == 'END' then
|
||||
keyword_handlers[word] = action
|
||||
return
|
||||
end
|
||||
if action then
|
||||
local last = keyword_handlers[word]
|
||||
keyword_handlers[word] = action
|
||||
return last
|
||||
else
|
||||
keyword_handlers[word] = nil
|
||||
end
|
||||
end
|
||||
|
||||
--- set a scoped keyword handler. Like keyword_handler, except
|
||||
-- it restores the original keyword handler (if any) at the end
|
||||
-- of the current block.
|
||||
-- @param word keyword
|
||||
-- @param action to be called when keyword is encountered
|
||||
-- @see keyword_handler
|
||||
function M.scoped_keyword_handler (keyword, action)
|
||||
local last = M.keyword_handler(keyword,action)
|
||||
M.block_handler(-1,function()
|
||||
M.keyword_handler(keyword,last)
|
||||
end)
|
||||
end
|
||||
|
||||
-- a convenient way to use keyword handlers. This sets a handler and restores
|
||||
-- the old handler at the end of the current block.
|
||||
-- @param word keyword
|
||||
-- @param action to be called when keyword is encountered
|
||||
-- @return a function that creates a scoped keyword handler
|
||||
function M.make_scoped_handler(keyword,handler)
|
||||
return function() M.scoped_keyword_handler(keyword, action) end
|
||||
end
|
||||
|
||||
M.please_throw = false
|
||||
|
||||
--- macro error messages.
|
||||
-- @param msg the message: will also have file:line.
|
||||
function M.error(msg)
|
||||
msg = M.filename..':'..lexer.line..': '..msg
|
||||
if M.please_throw then
|
||||
error(msg,2)
|
||||
else
|
||||
io.stderr:write(msg,'\n')
|
||||
os.exit(1)
|
||||
end
|
||||
end
|
||||
|
||||
M.define ('debug_',function()
|
||||
M.DEBUG = true
|
||||
end)
|
||||
|
||||
--- macro error assert.
|
||||
-- @param expr an expression.
|
||||
-- @param msg a message
|
||||
function M.assert(expr,msg)
|
||||
if not expr then M.error(msg or 'internal error') end
|
||||
return expr
|
||||
end
|
||||
|
||||
Getter.error = M.error
|
||||
Getter.assert = M.assert
|
||||
TokenList.assert = M.assert
|
||||
|
||||
local line_updater, line_table, last_name, last_lang
|
||||
|
||||
local function lua_line_updater (iline,oline)
|
||||
if not line_table then line_table = {} end
|
||||
append(line_table,{il=iline,ol=oline})
|
||||
end
|
||||
|
||||
local function c_line_updater (iline,oline,last_t,last_v)
|
||||
local endt = last_t == 'space' and last_v or '\n'
|
||||
return '#line '..iline..' "'..M.filename..'"'..endt
|
||||
end
|
||||
|
||||
local make_putter = TokenList.new
|
||||
|
||||
--- do a macro substitution on Lua source.
|
||||
-- @param src Lua source (either string or file-like reader)
|
||||
-- @param out output (a file-like writer)
|
||||
-- @param name input file name
|
||||
-- @param use_c nil for Lua; if 'line', then output #line directives; if true, then don't
|
||||
-- @return the result as table of strings
|
||||
-- @return line number information
|
||||
function M.substitute(src,name, use_c)
|
||||
local out, ii = {}, 1
|
||||
local subparse
|
||||
if name then
|
||||
last_name = name
|
||||
last_lang = use_c
|
||||
else
|
||||
name = last_name
|
||||
use_c = last_lang and true
|
||||
subparse = true
|
||||
end
|
||||
M.filename = name
|
||||
if use_c then
|
||||
lexer = require 'macro.clexer'
|
||||
scan_code = lexer.scan_c
|
||||
keywords = c_keywords
|
||||
if use_c == 'line' then
|
||||
line_updater = c_line_updater
|
||||
else
|
||||
line_updater = function() end
|
||||
end
|
||||
else
|
||||
lexer = require 'macro.lexer'
|
||||
scan_code = lexer.scan_lua
|
||||
keywords = lua_keywords
|
||||
line_updater = lua_line_updater
|
||||
end
|
||||
local tok = scan_code(src,name)
|
||||
local iline,iline_changed = 0
|
||||
local last_t,last_v = 'space','\n'
|
||||
local do_action
|
||||
|
||||
|
||||
local t,v = tok()
|
||||
|
||||
-- this function get() is always used, so that we can handle end-of-stream properly.
|
||||
-- The substitution mechanism pushes a new stream on the tstack, which is popped
|
||||
-- when empty.
|
||||
local tstack = {}
|
||||
local push,pop = table.insert,table.remove
|
||||
|
||||
local function get ()
|
||||
last_t,last_v = t,v
|
||||
local t,v = tok()
|
||||
while not t do
|
||||
tok = pop(tstack)
|
||||
if tok == nil then
|
||||
if not subparse and keyword_handlers.END then
|
||||
do_action(keyword_handlers.END)
|
||||
keyword_handlers.END = nil
|
||||
end
|
||||
if tok == nil then -- END action might have inserted some tokens
|
||||
return nil
|
||||
end
|
||||
end -- finally finished
|
||||
t,v = tok()
|
||||
end
|
||||
if name == lexer.name and iline ~= lexer.line then
|
||||
iline = lexer.line -- input line has changed
|
||||
iline_changed = last_v
|
||||
end
|
||||
return t,v
|
||||
end
|
||||
|
||||
local getter = Getter.new(get)
|
||||
|
||||
--- get a list of consecutive matching tokens.
|
||||
-- @param get token fetching function
|
||||
-- @param accept set of token types (default: `{space=true,comment=true}`)
|
||||
function getter.matching (get, accept)
|
||||
accept = accept or {space=true, comment=true}
|
||||
local tl = TokenList.new()
|
||||
local t,v = get:peek(1, true)
|
||||
while accept[t] do
|
||||
t,v = get ()
|
||||
append(tl, {t, v})
|
||||
t,v = get:peek(1, true)
|
||||
end
|
||||
return tl
|
||||
end
|
||||
|
||||
function getter:peek (offset,dont_skip)
|
||||
local step = offset < 0 and -1 or 1 -- passing offset 0 is undefined
|
||||
local k = 0
|
||||
local token, t, v
|
||||
repeat
|
||||
while true do
|
||||
token = tok (k)
|
||||
if not token then return nil, 'EOS' end
|
||||
t,v = token[1], token[2]
|
||||
if dont_skip or (t ~= 'space' and t ~= 'comment') then break end
|
||||
k = k + 1
|
||||
end
|
||||
offset = offset - step
|
||||
k = k + step
|
||||
until offset == 0
|
||||
return t,v,k+1
|
||||
end
|
||||
|
||||
function getter:peek2 ()
|
||||
local t1,v1,k1 = self:peek(1)
|
||||
local t2,v2 = self:peek(k1+1)
|
||||
return t1,v1,t2,v2
|
||||
end
|
||||
|
||||
function getter:patch (idx,text)
|
||||
out[idx] = text
|
||||
end
|
||||
|
||||
function getter:placeholder (put)
|
||||
put:iden '/MARK?/'
|
||||
return ii
|
||||
end
|
||||
|
||||
function getter:copy_from (pos,clear)
|
||||
local res = {}
|
||||
for i = pos, ii do
|
||||
if out[i] and not out[i]:match '^#line' then
|
||||
append(res,out[i])
|
||||
end
|
||||
end
|
||||
if clear then
|
||||
for i = pos, ii do
|
||||
table.remove(out,pos)
|
||||
ii = ii - 1
|
||||
end
|
||||
end
|
||||
return table.concat(res)
|
||||
end
|
||||
|
||||
-- this feeds the results of a substitution into the token stream.
|
||||
-- substitutions may be token lists, Lua strings or nil, in which case
|
||||
-- the substitution is ignored. The result is to push a new token stream
|
||||
-- onto the tstack, so it can be fetched using get() above
|
||||
local function push_substitution (subst)
|
||||
if subst == nil then return end
|
||||
local st = type(subst)
|
||||
push(tstack,tok)
|
||||
if st == 'table' then
|
||||
subst = scan_iter(subst)
|
||||
elseif st == 'string' then
|
||||
subst = scan_code(subst)
|
||||
end
|
||||
tok = subst
|
||||
end
|
||||
M.push_substitution = push_substitution
|
||||
|
||||
-- a macro object consists of a subst object and (optional) parameters.
|
||||
-- If there are parms, then a macro argument list must follow.
|
||||
-- The subst object is either a token list or a function; if a token list we
|
||||
-- substitute the actual parameters for the formal parameters; if a function
|
||||
-- then we call it with the actual parameters.
|
||||
-- Without parameters, it may be a simple substitution (TL or Lua string) or
|
||||
-- may be a function. In the latter case we call it passing the token getter,
|
||||
-- assuming that it will grab anything it needs from the token stream.
|
||||
local function expand_macro(get,mac)
|
||||
local pass_through
|
||||
local subst = mac.subst
|
||||
local fun = type(subst)=='function'
|
||||
if mac.parms then
|
||||
t = tnext(get);
|
||||
if t ~= '(' then
|
||||
M.error('macro '..mac.name..' expects parameters')
|
||||
end
|
||||
local args,err = Getter.list(get)
|
||||
M.assert(args,'no end of argument list')
|
||||
if fun then
|
||||
subst = subst(unpack(args))
|
||||
else
|
||||
if #mac.parms ~= #args then
|
||||
M.error(mac.name.." takes "..#mac.parms.." arguments")
|
||||
end
|
||||
subst = substitute_tokenlist(subst,mac.parms,args)
|
||||
end
|
||||
elseif fun then
|
||||
subst,pass_through = subst(getter,make_putter())
|
||||
end
|
||||
push_substitution(subst)
|
||||
return pass_through
|
||||
end
|
||||
|
||||
local multiline_tokens,sync = lexer.multiline_tokens,lexer.sync
|
||||
local line,last_diff = 0,0
|
||||
|
||||
function do_action (action)
|
||||
push_substitution(action(getter,make_putter()))
|
||||
end
|
||||
|
||||
if not subparse and keyword_handlers.BEGIN then
|
||||
do_action(keyword_handlers.BEGIN)
|
||||
end
|
||||
|
||||
while t do
|
||||
--print('tv',t,v)
|
||||
local dump = true
|
||||
if t == 'iden' then -- classic name macro
|
||||
local mac = imacros[v]
|
||||
if mac then
|
||||
dump = expand_macro(get,mac)
|
||||
end
|
||||
elseif t == 'keyword' then
|
||||
-- important to track block level for lexical scoping and block handlers
|
||||
local class = keywords[v]
|
||||
if class == 'open' then
|
||||
if v ~= 'else' then level = level + 1 end
|
||||
elseif class == 'close' then
|
||||
level = level - 1
|
||||
if block_handlers[level] then
|
||||
local res = process_block_handlers(level,get,v)
|
||||
if res then push_substitution(res) end
|
||||
end
|
||||
--* elseif class == 'hook' then
|
||||
end
|
||||
local action = keyword_handlers[v]
|
||||
if action then do_action(action) end
|
||||
else -- any unused 'operator' token (like @, \, #) can be used as a macro
|
||||
if use_c then
|
||||
if v == '{' then
|
||||
level = level + 1
|
||||
elseif v == '}' then
|
||||
level = level - 1
|
||||
if block_handlers[level] then
|
||||
local res = process_block_handlers(level,get,v)
|
||||
if res then push_substitution(res) end
|
||||
end
|
||||
end
|
||||
end
|
||||
local mac = smacros[v]
|
||||
if mac then
|
||||
dump = expand_macro(get,mac)
|
||||
end
|
||||
end
|
||||
if dump then
|
||||
if multiline_tokens[t] then -- track output line
|
||||
line = sync(line, v)
|
||||
end
|
||||
if iline_changed then
|
||||
local diff = line - iline
|
||||
if diff ~= last_diff then
|
||||
local ldir = line_updater(iline,line,last_t,last_v)
|
||||
if ldir then out[ii] = ldir; ii=ii+1 end
|
||||
last_diff = diff
|
||||
end
|
||||
iline_changed = nil
|
||||
end
|
||||
out[ii] = v
|
||||
ii = ii + 1
|
||||
end
|
||||
t,v = get()
|
||||
end
|
||||
|
||||
return out,line_table
|
||||
end
|
||||
|
||||
--- take some Lua source and return the result of the substitution.
|
||||
-- Does not raise any errors.
|
||||
-- @param src either a string or a readable file object
|
||||
-- @param name optional name for the chunk
|
||||
-- @return the result or nil
|
||||
-- @return the error, if error
|
||||
function M.substitute_tostring(src,name,use_c,throw)
|
||||
M.please_throw = true
|
||||
local ok,out,li
|
||||
if throw then
|
||||
out,li = M.substitute(src,name,use_c)
|
||||
else
|
||||
ok,out,li = pcall(M.substitute,src,name,use_c)
|
||||
end
|
||||
if type(src) ~= 'string' and src.close then src:close() end
|
||||
if not ok then return nil, out
|
||||
else
|
||||
return table.concat(out), li
|
||||
end
|
||||
end
|
||||
|
||||
local lua52 = _VERSION:match '5.2'
|
||||
local load, searchpath = load, package.searchpath
|
||||
|
||||
if not lua52 then -- Lua 5.1
|
||||
function load (env,src,name)
|
||||
local chunk,err = loadstring(src,name)
|
||||
if chunk and env then
|
||||
setfenv(chunk,env)
|
||||
end
|
||||
return chunk,err
|
||||
end
|
||||
end
|
||||
|
||||
if not searchpath then
|
||||
local sep = package.config:sub(1,1)
|
||||
searchpath = function (mod,path)
|
||||
mod = mod:gsub('%.',sep)
|
||||
for m in path:gmatch('[^;]+') do
|
||||
local nm = m:gsub('?',mod)
|
||||
local f = io.open(nm,'r')
|
||||
if f then f:close(); return nm end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
--- load Lua code in a given envrionment after passing
|
||||
-- through the macro preprocessor.
|
||||
-- @param src either a string or a readable file object
|
||||
-- @param name optional name for the chunk
|
||||
-- @param env the environment (may be nil)
|
||||
-- @return the cnunk, or nil
|
||||
-- @return the error, if no chunk
|
||||
function M.load(src,name,env)
|
||||
local res,err = M.substitute_tostring(src,'tmp')
|
||||
if not res then return nil,err end
|
||||
return loadin(env,res,name)
|
||||
end
|
||||
|
||||
--- evaluate Lua macro code in a given environment.
|
||||
-- @param src either a string or a readable file object
|
||||
-- @param env the environment (can be nil)
|
||||
-- @return true if succeeded
|
||||
-- @return result(s)
|
||||
function M.eval(src,env)
|
||||
local chunk,err = M.loadin(src,'(tmp)',env)
|
||||
if not chunk then return nil,err end
|
||||
return pcall(chunk)
|
||||
end
|
||||
|
||||
package.mpath = './?.m.lua'
|
||||
|
||||
--- Make `require` use macro expansion.
|
||||
-- This is controlled by package.mpath, which is initially './?.m.lua'
|
||||
function M.set_package_loader()
|
||||
-- directly inspired by https://github.com/bartbes/Meta/blob/master/meta.lua#L32,
|
||||
-- after a suggestion by Alexander Gladysh
|
||||
table.insert(package.searchers, function(name)
|
||||
local fname = searchpath(name,package.mpath)
|
||||
if not fname then return nil,"cannot find "..name end
|
||||
local res,err = M.load(io.open(fname),lname)
|
||||
if not res then
|
||||
error (err)
|
||||
end
|
||||
return res
|
||||
end)
|
||||
end
|
||||
|
||||
return macro
|
|
@ -0,0 +1,24 @@
|
|||
--[[
|
||||
6502 assembler macros.
|
||||
]]
|
||||
|
||||
local M = require 'macro'
|
||||
|
||||
local val = function(s)
|
||||
end
|
||||
|
||||
local op_imm = {}
|
||||
|
||||
local op = {
|
||||
lda = function(get,put)
|
||||
get:expecting 'space'
|
||||
local t,v = get:next()
|
||||
if t ~= '#' then return nil,true end
|
||||
t,v = get:block(nil, {['\n']=true,['--']=true})
|
||||
return put 'lda.imm(' :tokenlist t ')' :token v
|
||||
--v = get:upto '\n' --'[;\n(--)]'
|
||||
--return ('lda.imm(%s)\n'):format(v)
|
||||
end,
|
||||
}
|
||||
|
||||
for k,v in pairs(op) do M.define(k,v) end
|
|
@ -0,0 +1,320 @@
|
|||
--- Getter class. Used to get values from the token stream. The first
|
||||
-- argument `get` of a macro substitution function is of this type.
|
||||
--
|
||||
-- M.define ('\\',function(get,put)
|
||||
-- local args, body = get:idens('('), get:list()
|
||||
-- return put:keyword 'function' '(' : idens(args) ')' :
|
||||
-- keyword 'return' : list(body) : space() : keyword 'end'
|
||||
-- end)
|
||||
--
|
||||
-- The second argument `put` is a `TokenList` object.
|
||||
-- @see macro.TokenList
|
||||
-- @module macro.Getter
|
||||
|
||||
local TokenList = require 'macro.TokenList'
|
||||
local append = table.insert
|
||||
local setmetatable = setmetatable
|
||||
|
||||
local Getter = {
|
||||
__call = function(self)
|
||||
return self.fun()
|
||||
end
|
||||
}
|
||||
local M = Getter
|
||||
|
||||
Getter.__index = Getter;
|
||||
|
||||
local scan_iter
|
||||
|
||||
function Getter.new (get)
|
||||
return setmetatable({fun=get},Getter)
|
||||
end
|
||||
|
||||
function Getter.from_tl(tl)
|
||||
return Getter.new(scan_iter(tl))
|
||||
end
|
||||
|
||||
local Tok = {
|
||||
__tostring = function(self)
|
||||
return self[2]
|
||||
end
|
||||
}
|
||||
|
||||
local function tok_new (t)
|
||||
return setmetatable(t,Tok)
|
||||
end
|
||||
|
||||
-- create a token iterator out of a token list
|
||||
function Getter.scan_iter (tlist)
|
||||
local i,n = 1,#tlist
|
||||
return function(k)
|
||||
if k ~= nil then
|
||||
k = i + k
|
||||
if k < 1 or k > n then return nil end
|
||||
return tlist[k]
|
||||
end
|
||||
local tv = tlist[i]
|
||||
if tv == nil then return nil end
|
||||
i = i + 1
|
||||
return tv[1],tv[2]
|
||||
end
|
||||
end
|
||||
|
||||
scan_iter = Getter.scan_iter
|
||||
|
||||
--- get the next non-whitespace token.
|
||||
-- @return token type
|
||||
-- @return token value
|
||||
-- @function Getter.next
|
||||
function Getter.next(get)
|
||||
local t,v = get()
|
||||
while t == 'space' or t == 'comment' do
|
||||
t,v = get()
|
||||
end
|
||||
return t,v
|
||||
end
|
||||
|
||||
local TL,LTL = TokenList.new, TokenList.new_list
|
||||
|
||||
|
||||
local function tappend (tl,t,val)
|
||||
val = val or t
|
||||
append(tl,{t,val})
|
||||
end
|
||||
|
||||
--- get a balanced block.
|
||||
-- Typically for grabbing up to an `end` keyword including any nested
|
||||
-- `if`, `do` or `function` blocks with their own `end` keywords.
|
||||
-- @param tok the token stream
|
||||
-- @param begintokens set of tokens requiring their own nested *endtokens*
|
||||
-- (default: `{['do']=true,['function']=true,['if']=true}`)
|
||||
-- @param endtokens set of tokens ending a block (default:`{['end']=true}`)
|
||||
-- @return list of tokens
|
||||
-- @return block end token in form `{type,value}`
|
||||
-- @usage
|
||||
-- -- copy a balanced table constructor
|
||||
-- get:expecting '{'
|
||||
-- put '{':tokens (get:block ({['{']=true}, {['}']=true}) '}')
|
||||
function Getter.block(tok,begintokens,endtokens)
|
||||
begintokens = begintokens or {['do']=true,['function']=true,['if']=true}
|
||||
endtokens = endtokens or {['end']=true}
|
||||
local level = 1 -- used to count expected matching `endtokens`
|
||||
local tl = TL()
|
||||
local token,value
|
||||
repeat
|
||||
token,value = tok()
|
||||
if not token then return nil,'unexpected end of block' end
|
||||
if begintokens[value] then
|
||||
level = level + 1
|
||||
elseif endtokens[value] then
|
||||
level = level - 1
|
||||
end
|
||||
if level > 0 then -- final end token is returned separately
|
||||
tappend(tl,token,value)
|
||||
end
|
||||
until level == 0
|
||||
return tl,tok_new{token,value}
|
||||
end
|
||||
|
||||
--- get a delimited list of token lists.
|
||||
-- Typically used for grabbing argument lists like ('hello',a+1,fred(c,d)); will count parens
|
||||
-- so that the delimiter (usually a comma) is ignored inside sub-expressions. You must have
|
||||
-- already read the start token of the list, e.g. open parentheses. It will eat the end token
|
||||
-- and return the list of TLs, plus the end token. Based on similar code in Penlight's
|
||||
-- `pl.lexer` module.
|
||||
-- @param tok the token stream
|
||||
-- @param endt the end token (default ')')
|
||||
-- @param delim the delimiter (default ',')
|
||||
-- @return list of token lists
|
||||
-- @return end token in form {type,value}
|
||||
function Getter.list(tok,endtoken,delim)
|
||||
endtoken = endtoken or ')'
|
||||
delim = delim or ','
|
||||
local parm_values = LTL()
|
||||
local level = 1 -- used to count ( and )
|
||||
local tl = TL()
|
||||
local is_end
|
||||
if type(endtoken) == 'function' then
|
||||
is_end = endtoken
|
||||
elseif endtoken == '\n' then
|
||||
is_end = function(t,val)
|
||||
return t == 'space' and val:find '\n'
|
||||
end
|
||||
else
|
||||
is_end = function (t)
|
||||
return t == endtoken
|
||||
end
|
||||
end
|
||||
local token,value = tok()
|
||||
if is_end(token,value) then return parm_values end
|
||||
if token == 'space' then
|
||||
token,value = tok()
|
||||
end
|
||||
while true do
|
||||
if not token then return nil,'unexpected end of list' end -- end of stream is an error!
|
||||
if is_end(token,value) and level == 1 then
|
||||
append(parm_values,tl)
|
||||
break
|
||||
elseif token == '(' then
|
||||
level = level + 1
|
||||
tappend(tl,'(')
|
||||
elseif token == ')' then
|
||||
level = level - 1
|
||||
if level == 0 then -- finished with parm list
|
||||
append(parm_values,tl)
|
||||
break
|
||||
else
|
||||
tappend(tl,')')
|
||||
end
|
||||
elseif token == '{' then
|
||||
level = level + 1
|
||||
tappend(tl,'{')
|
||||
elseif token == '}' then
|
||||
level = level - 1
|
||||
tappend(tl,'}')
|
||||
elseif token == delim and level == 1 then
|
||||
append(parm_values,tl) -- a new parm
|
||||
tl = TL()
|
||||
else
|
||||
tappend(tl,token,value)
|
||||
end
|
||||
token,value=tok()
|
||||
end
|
||||
return parm_values,tok_new{token,value}
|
||||
end
|
||||
|
||||
function Getter.upto_keywords (k1,k2)
|
||||
return function(t,v)
|
||||
return t == 'keyword' and (v == k1 or v == k2)
|
||||
end,''
|
||||
end
|
||||
|
||||
local tnext = Getter.next
|
||||
|
||||
|
||||
function Getter.upto(tok,k1,k2)
|
||||
local endt = k1
|
||||
if type(k1) == 'string' and k1:match '^%a+$' then
|
||||
endt = Getter.upto_keywords(k1,k2)
|
||||
end
|
||||
local ltl,tok = tok:list(endt,'')
|
||||
M.assert(ltl ~= nil and #ltl > 0,'failed to grab tokens')
|
||||
return ltl[1],tok
|
||||
end
|
||||
|
||||
function Getter.line(tok)
|
||||
return tok:upto(function(t,v)
|
||||
return (t=='space' and v:match '\n') or t == 'comment'
|
||||
end)
|
||||
end
|
||||
|
||||
|
||||
local function prettyprint (t, v)
|
||||
v = v:gsub ("\n", "\\n")
|
||||
if t == "string" then
|
||||
if #v > 16 then v = v:sub(1,12).."..."..v:sub(1,1) end
|
||||
return t.." "..v
|
||||
end
|
||||
if #v > 16 then v = v:sub(1,12).."..." end
|
||||
if t == "space" or t == "comment" or t == "keyword" then
|
||||
return t.." '"..v.."'"
|
||||
elseif t == v then
|
||||
return "'"..v.."'"
|
||||
else
|
||||
return t.." "..v
|
||||
end
|
||||
end
|
||||
|
||||
--- get the next identifier token.
|
||||
-- (will be an error if the token has wrong type)
|
||||
-- @return identifier name
|
||||
function Getter.iden(tok)
|
||||
local t,v = tnext(tok)
|
||||
M.assert(t == 'iden','expecting identifier, got '..prettyprint(t,v))
|
||||
return v
|
||||
end
|
||||
|
||||
Getter.name = Getter.iden -- backwards compatibility!
|
||||
|
||||
--- get the next number token.
|
||||
-- (will be an error if the token has wrong type)
|
||||
-- @return converted number
|
||||
function Getter.number(tok)
|
||||
local t,v = tnext(tok)
|
||||
M.assert(t == 'number','expecting number, got '..prettyprint(t,v))
|
||||
return tonumber(v)
|
||||
end
|
||||
|
||||
--- get a delimited list of identifiers.
|
||||
-- works like list.
|
||||
-- @param tok the token stream
|
||||
-- @param endt the end token (default ')')
|
||||
-- @param delim the delimiter (default ',')
|
||||
-- @see list
|
||||
function Getter.idens(tok,endt,delim)
|
||||
local ltl,err = tok:list(endt,delim)
|
||||
if not ltl then error('idens: '..err) end
|
||||
local names = {}
|
||||
-- list() will return {{}} for an empty list of tlists
|
||||
for i = 1,#ltl do
|
||||
local tl = ltl[i]
|
||||
local tv = tl[1]
|
||||
if tv then
|
||||
if tv[1] == 'space' then tv = tl[2] end
|
||||
names[i] = tv[2]
|
||||
end
|
||||
end
|
||||
return names, err
|
||||
end
|
||||
|
||||
Getter.names = Getter.idens -- backwards compatibility!
|
||||
|
||||
--- get the next string token.
|
||||
-- (will be an error if the token has wrong type)
|
||||
-- @return string value (without quotes)
|
||||
function Getter.string(tok)
|
||||
local t,v = tok:expecting("string")
|
||||
return v:sub(2,-2)
|
||||
end
|
||||
|
||||
--- assert that the next token has the given type. This will throw an
|
||||
-- error if the next non-whitespace token does not match.
|
||||
-- @param type a token type ('iden','string',etc)
|
||||
-- @param value a token value (optional)
|
||||
-- @usage get:expecting '('
|
||||
-- @usage get:expecting ('iden','bonzo')
|
||||
function Getter.expecting (tok,type,value)
|
||||
local t,v = tnext(tok)
|
||||
if t ~= type then M.error ("expected "..type.." got "..prettyprint(t,v)) end
|
||||
if value then
|
||||
if v ~= value then M.error("expected "..value.." got "..prettyprint(t,v)) end
|
||||
end
|
||||
return t,v
|
||||
end
|
||||
|
||||
--- peek ahead or before in the token stream.
|
||||
-- @param k positive delta for looking ahead, negative for looking behind.
|
||||
-- @param dont_skip true if you want to check for whitespace
|
||||
-- @return the token type
|
||||
-- @return the token value
|
||||
-- @return the token offset
|
||||
-- @function Getter.peek
|
||||
|
||||
--- peek ahead two tokens.
|
||||
-- @return first token type
|
||||
-- @return first token value
|
||||
-- @return second token type
|
||||
-- @return second token value
|
||||
-- @function Getter.peek2
|
||||
|
||||
--- patch the token stream at the end.
|
||||
-- @param idx index in output table
|
||||
-- @param text to replace value at that index
|
||||
-- @function Getter.patch
|
||||
|
||||
--- put out a placeholder for later patching.
|
||||
-- @param put a putter object
|
||||
-- @return an index into the output table
|
||||
-- @function Getter.placeholder
|
||||
|
||||
return Getter
|
|
@ -0,0 +1,201 @@
|
|||
---------------
|
||||
-- A TokenList class for generating token lists.
|
||||
--
|
||||
-- There are also useful `get_` methods for extracting values from
|
||||
-- the first token.
|
||||
--
|
||||
-- @module macro.TokenList
|
||||
|
||||
local TokenList = {}
|
||||
local M = TokenList
|
||||
TokenList.__index = TokenList
|
||||
|
||||
local append = table.insert
|
||||
|
||||
function TokenList.new (tl)
|
||||
return setmetatable(tl or {},TokenList)
|
||||
end
|
||||
|
||||
local TokenListList = {}
|
||||
|
||||
function TokenList.new_list (ltl)
|
||||
return setmetatable(ltl or {},TokenListList)
|
||||
end
|
||||
|
||||
TokenListList.__index = function(self,key)
|
||||
local m = TokenList[key]
|
||||
return function(self,...)
|
||||
local res = {}
|
||||
for i = 1,#self do res[i] = m(self[i],...) end
|
||||
return TokenList.new_list(res)
|
||||
end
|
||||
end
|
||||
|
||||
-- token-getting helpers
|
||||
|
||||
|
||||
local function extract (tl)
|
||||
local tk = tl[1]
|
||||
if tk[1] == 'space' then
|
||||
tk = tl[2]
|
||||
end
|
||||
return tk
|
||||
end
|
||||
|
||||
--- get an identifier from front of a token list.
|
||||
-- @return identifier name
|
||||
function TokenList.get_iden (tl)
|
||||
local tk = extract(tl)
|
||||
M.assert(tk[1]=='iden','expecting identifier')
|
||||
return tk[2]
|
||||
end
|
||||
|
||||
--- get an number from front of a token list.
|
||||
-- @return number
|
||||
function TokenList.get_number(tl)
|
||||
local tk = extract(tl)
|
||||
M.assert(tk[1]=='number','expecting number')
|
||||
return tonumber(tk[2])
|
||||
end
|
||||
|
||||
--- get a string from front of a token list.
|
||||
-- @return string value (without quotes)
|
||||
function TokenList.get_string(tl)
|
||||
local tk = extract(tl)
|
||||
M.assert(tk[1]=='string')
|
||||
return tk[2]:sub(2,-2) -- watch out! what about long string literals??
|
||||
end
|
||||
|
||||
--- takes a token list and strips spaces and comments.
|
||||
-- @return new tokenlist
|
||||
function TokenList.strip_spaces (tl)
|
||||
local out = TokenList.new()
|
||||
for _,t in ipairs(tl) do
|
||||
if t[1] ~= 'comment' and t[1] ~= 'space' then
|
||||
append(out,t)
|
||||
end
|
||||
end
|
||||
return out
|
||||
end
|
||||
|
||||
--- pick the n-th token from this tokenlist.
|
||||
-- Note that it returns the value and type, not the type and value.
|
||||
-- @param n (1 to #self)
|
||||
-- @return token value
|
||||
-- @return token type
|
||||
function TokenList.pick (tl,n)
|
||||
local t = tl[n]
|
||||
return t[2],t[1]
|
||||
end
|
||||
|
||||
-- token-putting helpers
|
||||
local comma,space = {',',','},{'space',' '}
|
||||
|
||||
--- append an identifier.
|
||||
-- @param name the identifier
|
||||
-- @param no_space true if you don't want a space after the iden
|
||||
-- @return self
|
||||
function TokenList.iden(res,name,no_space)
|
||||
append(res,{'iden',name})
|
||||
if not no_space then
|
||||
append(res,space)
|
||||
end
|
||||
return res
|
||||
end
|
||||
|
||||
TokenList.name = TokenList.iden -- backwards compatibility!
|
||||
|
||||
--- append a string.
|
||||
-- @param s the string
|
||||
-- @return self
|
||||
function TokenList.string(res,s)
|
||||
append(res,{'string','"'..s..'"'})
|
||||
return res
|
||||
end
|
||||
|
||||
--- append a number.
|
||||
-- @param val the number
|
||||
-- @return self
|
||||
function TokenList.number(res,val)
|
||||
append(res,{'number',val})
|
||||
return res
|
||||
end
|
||||
|
||||
--- put out a list of identifiers, separated by commas.
|
||||
-- @param res output token list
|
||||
-- @param names a list of identifiers
|
||||
-- @return self
|
||||
function TokenList.idens(res,names)
|
||||
for i = 1,#names do
|
||||
res:iden(names[i],true)
|
||||
if i ~= #names then append(res,comma) end
|
||||
end
|
||||
return res
|
||||
end
|
||||
|
||||
TokenList.names = TokenList.idens -- backwards compatibility!
|
||||
|
||||
--- put out a token list.
|
||||
-- @param res output token list
|
||||
-- @param tl a token list
|
||||
-- @return self
|
||||
function TokenList.tokens(res,tl)
|
||||
for j = 1,#tl do
|
||||
append(res,tl[j])
|
||||
end
|
||||
return res
|
||||
end
|
||||
|
||||
--- put out a list of token lists, separated by commas.
|
||||
-- @param res output token list
|
||||
-- @param ltl a list of token lists
|
||||
-- @return self
|
||||
function TokenList.list(res,ltl)
|
||||
for i = 1,#ltl do
|
||||
res:tokens(ltl[i])
|
||||
if i ~= #ltl then append(res,comma) end
|
||||
end
|
||||
return res
|
||||
end
|
||||
|
||||
--- put out a space token.
|
||||
-- @param res output token list
|
||||
-- @param space a string containing only whitespace (default ' ')
|
||||
-- @return self
|
||||
function TokenList.space(res,space)
|
||||
append(res,{'space',space or ' '})
|
||||
return res
|
||||
end
|
||||
|
||||
--- put out a keyword token.
|
||||
-- @param res output token list
|
||||
-- @param keyw a Lua keyword
|
||||
-- @param no_space true if you don't want a space after the iden
|
||||
-- @return self
|
||||
function TokenList.keyword(res,keyw,no_space)
|
||||
append(res,{'keyword',keyw})
|
||||
if not no_space then
|
||||
append(res,space)
|
||||
end
|
||||
return res
|
||||
end
|
||||
|
||||
--- convert this tokenlist into a string.
|
||||
function TokenList.__tostring(tl)
|
||||
local res = {}
|
||||
for j = 1,#tl do
|
||||
append(res,tl[j][2])
|
||||
end
|
||||
return table.concat(res)
|
||||
end
|
||||
|
||||
--- put out a operator token. This is the overloaded call operator
|
||||
-- for token lists.
|
||||
-- @param res output token list
|
||||
-- @param keyw an operator string
|
||||
function TokenList.__call(res,t,v)
|
||||
append(res,{t,v or t})
|
||||
return res
|
||||
end
|
||||
|
||||
return TokenList
|
|
@ -0,0 +1,161 @@
|
|||
-------
|
||||
-- LuaMacro built-in macros.
|
||||
-- @module macro.builtin
|
||||
|
||||
local M = require 'macro'
|
||||
|
||||
local function macro_def (scoped)
|
||||
return function (get)
|
||||
local t,name,parms,openp
|
||||
local t,name = get:next()
|
||||
local upto,ret
|
||||
if t == '(' then
|
||||
t,name = get:next()
|
||||
upto = function(t,v) return t == ')' end
|
||||
else
|
||||
upto = function(t,v)
|
||||
return t == 'space' and v:find '\n'
|
||||
end
|
||||
-- return space following (returned by copy_tokens)
|
||||
ret = true
|
||||
end
|
||||
-- might be immediately followed by a parm list
|
||||
t,openp = get()
|
||||
if openp == '(' then
|
||||
parms = get:names()
|
||||
end
|
||||
-- the actual substitution is up to the end of the line
|
||||
local args, space = M.copy_tokens(get,upto)
|
||||
if scoped then
|
||||
M.define_scoped(name,args,parms)
|
||||
else
|
||||
M.set_macro(name,args,parms)
|
||||
end
|
||||
return ret and space[2]
|
||||
end
|
||||
end
|
||||
|
||||
--- a macro for defining lexically scoped simple macros.
|
||||
-- def_ may be followed by an arglist, and the substitution is the
|
||||
-- rest of the line.
|
||||
-- @usage def_ block (function() _END_CLOSE_
|
||||
-- @usage def_ sqr(x) ((x)*(x))
|
||||
-- @macro def_
|
||||
M.define ('def_',macro_def(true))
|
||||
|
||||
--- a global version of `def_`.
|
||||
-- @see def_
|
||||
-- @macro define_
|
||||
M.define ('define_',macro_def(false))
|
||||
|
||||
--- set the value of an existing macro.
|
||||
-- the name and value follows immediately, and the value must be
|
||||
-- a single token
|
||||
-- @usage set_ T 'string'
|
||||
-- @usage set_ F function
|
||||
-- @macro set_
|
||||
M.define('set_',function(get)
|
||||
local name = get:name()
|
||||
local t,v = get:next()
|
||||
M.set_macro(name,{{t,v}})
|
||||
end)
|
||||
|
||||
--- undefining identifier macros.
|
||||
-- @macro undef_
|
||||
M.define('undef_',function(get)
|
||||
M.set_macro(get:name())
|
||||
end)
|
||||
|
||||
--- Insert text after current block end. `_END_` is followed by a quoted string
|
||||
-- and is used to insert that string after the current block closes.
|
||||
-- @macro _END_
|
||||
M.define ('_END_',function(get)
|
||||
local str = get:string()
|
||||
M.block_handler(-1,function(get,word)
|
||||
if word ~= 'end' then return nil,true end
|
||||
return str
|
||||
end)
|
||||
end)
|
||||
|
||||
--- insert an end after the next closing block.
|
||||
-- @macro _END_END_
|
||||
-- @see _END_
|
||||
M.define '_END_END_ _END_ " end"'
|
||||
|
||||
--- insert a closing parens after next closing block.
|
||||
-- @usage def_ begin (function() _END_CLOSE_
|
||||
-- fun begin ... end --> fun (function() ... end)
|
||||
-- @macro _END_CLOSE_
|
||||
-- @see _END_
|
||||
M.define '_END_CLOSE_ _END_ ")"'
|
||||
|
||||
--- 'stringizing' macro.
|
||||
-- Will convert its argument into a string.
|
||||
-- @usage def_ _assert(x) assert(x,_STR_(x))
|
||||
-- @macro _STR_
|
||||
M.define('_STR_(x)',function(x)
|
||||
x = tostring(x)
|
||||
local put = M.Putter()
|
||||
return put '"':name(x) '"'
|
||||
end)
|
||||
|
||||
-- macro stack manipulation
|
||||
|
||||
|
||||
--- push a value onto a given macro' stack.
|
||||
-- @macro _PUSH_
|
||||
-- @param mac existing macro name
|
||||
-- @param V a string
|
||||
M.define('_PUSH_(mac,V)',function(mac,V)
|
||||
M.push_macro_stack(mac:get_string(),V:get_string())
|
||||
end)
|
||||
|
||||
--- pop a value from a macro's stack.
|
||||
-- @macro _POP_
|
||||
-- @param mac existing macro name
|
||||
-- @return a string
|
||||
-- @see _PUSH_
|
||||
M.define('_POP_',function(get,put)
|
||||
local val = M.pop_macro_stack(get:string())
|
||||
if val then
|
||||
return put(val)
|
||||
end
|
||||
end)
|
||||
|
||||
--- drop the top of a macro's stack.
|
||||
-- Like `_POP_`, except that it does not return the value
|
||||
-- @macro _DROP_
|
||||
-- @return existing macro name
|
||||
-- @see _POP_
|
||||
M.define('_DROP_',function(get)
|
||||
M.pop_macro_stack(get:string())
|
||||
end)
|
||||
|
||||
--- Load a Lua module immediately. This allows macro definitions to
|
||||
-- to be loaded before the rest of the file is parsed.
|
||||
-- If the module returns a function, then this is assumed to be a
|
||||
-- substitution function, allowing macro modules to insert code
|
||||
-- at this point.
|
||||
-- @macro require_
|
||||
M.define('require_',function(get,put)
|
||||
local name = get:string()
|
||||
local ok,fn = pcall(require,name)
|
||||
if not ok then
|
||||
fn = require('macro.'..name)
|
||||
end
|
||||
if type(fn) == 'function' then
|
||||
return fn(get,put)
|
||||
end
|
||||
end)
|
||||
|
||||
--- Include the contents of a file. This inserts the file directly
|
||||
-- into the token stream, and is equivalent to cpp's `#include` directive.
|
||||
-- @macro include_
|
||||
M.define('include_',function(get)
|
||||
local str = get:string()
|
||||
local f = M.assert(io.open(str))
|
||||
local txt = f:read '*a'
|
||||
f:close()
|
||||
M.push_substitution(txt)
|
||||
end)
|
||||
|
|
@ -0,0 +1,169 @@
|
|||
--[[--- A C lexical scanner using LPeg.
|
||||
= CREDITS
|
||||
= based on the C lexer in Peter Odding's lua-lxsh
|
||||
@module macro.clexer
|
||||
--]]
|
||||
|
||||
local clexer = {}
|
||||
local lpeg = require 'lpeg'
|
||||
local P, R, S, C, Cc, Ct = lpeg.P, lpeg.R, lpeg.S, lpeg.C, lpeg.Cc, lpeg.Ct
|
||||
|
||||
-- create a pattern which captures the lua value [id] and the input matching
|
||||
-- [patt] in a table
|
||||
local function token(id, patt) return Ct(Cc(id) * C(patt)) end
|
||||
|
||||
-- private interface
|
||||
local table_of_tokens
|
||||
local extra_tokens
|
||||
|
||||
function clexer.add_extra_tokens(extra)
|
||||
extra_tokens = extra_tokens or {}
|
||||
for _,t in ipairs(extra) do
|
||||
table.insert(extra_tokens,t)
|
||||
end
|
||||
table_of_tokens = nil -- re-initialize
|
||||
end
|
||||
|
||||
function clexer.init ()
|
||||
local digit = R('09')
|
||||
|
||||
local upp, low = R'AZ', R'az'
|
||||
local oct, dec = R'07', R'09'
|
||||
local hex = dec + R'AF' + R'af'
|
||||
local letter = upp + low
|
||||
local alnum = letter + dec + '_'
|
||||
local endline = S'\r\n\f'
|
||||
local newline = '\r\n' + endline
|
||||
local escape = '\\' * ( newline
|
||||
+ S'\\"\'?abfnrtv'
|
||||
+ (#oct * oct^-3)
|
||||
+ ('x' * #hex * hex^-2))
|
||||
|
||||
|
||||
-- range of valid characters after first character of identifier
|
||||
local idsafe = R('AZ', 'az', '\127\255') + P '_'
|
||||
|
||||
-- operators
|
||||
local OT = P '=='
|
||||
if extra_tokens then
|
||||
for _,ex in ipairs(extra_tokens) do
|
||||
OT = OT + P(ex)
|
||||
end
|
||||
end
|
||||
local operator = token('operator', OT + P '.' + P'>>=' + '<<=' + '--' + '>>' + '>=' + '/=' + '==' + '<='
|
||||
+ '+=' + '<<' + '*=' + '++' + '&&' + '|=' + '||' + '!=' + '&=' + '-='
|
||||
+ '^=' + '%=' + '->' + S',)*%+&(-~/^]{}|.[>!?:=<;')
|
||||
-- identifiers
|
||||
local ident = token('iden', idsafe * (idsafe + digit) ^ 0)
|
||||
|
||||
-- keywords
|
||||
local keyword = token('keyword', (P 'auto' + P 'break' + P 'case' + P'char' +
|
||||
P 'const' + P 'continue' + P 'default' +
|
||||
P 'do' + P 'double' + P 'else' + P 'enum' + P 'extern' + P 'float' +
|
||||
P 'for' + P 'goto' + P 'if' + P 'int' + P 'long' + P 'register' +
|
||||
P 'return' + P 'short' + P 'signed' + P 'sizeof' + P 'static' +
|
||||
P 'struct' + P 'switch' + P 'typedef' + P 'union' + P 'void' +
|
||||
P 'volatile' + P 'while') * -(idsafe + digit))
|
||||
|
||||
-- numbers
|
||||
local number_sign = S'+-'^-1
|
||||
local number_decimal = digit ^ 1
|
||||
local number_hexadecimal = P '0' * S 'xX' * R('09', 'AF', 'af') ^ 1
|
||||
local number_float = (digit^1 * P'.' * digit^0 + P'.' * digit^1) *
|
||||
(S'eE' * number_sign * digit^1)^-1
|
||||
local number = token('number', number_hexadecimal +
|
||||
number_float +
|
||||
number_decimal)
|
||||
|
||||
|
||||
local string = token('string', '"' * ((1 - S'\\\r\n\f"') + escape)^0 * '"')
|
||||
local char = token('char',"'" * ((1 - S"\\\r\n\f'") + escape) * "'")
|
||||
|
||||
-- comments
|
||||
local singleline_comment = P '//' * (1 - S '\r\n\f') ^ 0
|
||||
local multiline_comment = '/*' * (1 - P'*/')^0 * '*/'
|
||||
local comment = token('comment', multiline_comment + singleline_comment)
|
||||
local prepro = token('prepro',P '#' * (1 - S '\r\n\f') ^ 0)
|
||||
|
||||
-- whitespace
|
||||
local whitespace = token('space', S('\r\n\f\t ')^1)
|
||||
|
||||
-- ordered choice of all tokens and last-resort error which consumes one character
|
||||
local any_token = whitespace + number + keyword + ident +
|
||||
string + char + comment + prepro + operator + token('error', 1)
|
||||
|
||||
|
||||
table_of_tokens = Ct(any_token ^ 0)
|
||||
end
|
||||
|
||||
-- increment [line] by the number of line-ends in [text]
|
||||
local function sync(line, text)
|
||||
local index, limit = 1, #text
|
||||
while index <= limit do
|
||||
local start, stop = text:find('\r\n', index, true)
|
||||
if not start then
|
||||
start, stop = text:find('[\r\n\f]', index)
|
||||
if not start then break end
|
||||
end
|
||||
index = stop + 1
|
||||
line = line + 1
|
||||
end
|
||||
return line
|
||||
end
|
||||
clexer.sync = sync
|
||||
|
||||
clexer.line = 0
|
||||
|
||||
-- we only need to synchronize the line-counter for these token types
|
||||
local multiline_tokens = { comment = true, space = true }
|
||||
clexer.multiline_tokens = multiline_tokens
|
||||
|
||||
function clexer.scan_c_tokenlist(input)
|
||||
if not table_of_tokens then
|
||||
clexer.init()
|
||||
end
|
||||
assert(type(input) == 'string', 'bad argument #1 (expected string)')
|
||||
local line = 1
|
||||
local tokens = lpeg.match(table_of_tokens, input)
|
||||
for i, token in pairs(tokens) do
|
||||
local t = token[1]
|
||||
if t == 'operator' or t == 'error' then
|
||||
token[1] = token[2]
|
||||
end
|
||||
token[3] = line
|
||||
if multiline_tokens[t] then
|
||||
line = sync(line, token[2])
|
||||
end
|
||||
end
|
||||
return tokens
|
||||
end
|
||||
|
||||
--- get a token iterator from a source containing Lua code.
|
||||
-- S is the source - can be a string or a file-like object (i.e. read() returns line)
|
||||
-- Note that this token iterator includes spaces and comments, and does not convert
|
||||
-- string and number tokens - so e.g. a string token is quoted and a number token is
|
||||
-- an unconverted string.
|
||||
function clexer.scan_c(input,name)
|
||||
if type(input) ~= 'string' and input.read then
|
||||
input = input:read('*a')
|
||||
end
|
||||
local tokens = clexer.scan_c_tokenlist(input)
|
||||
local i, n = 1, #tokens
|
||||
return function(k)
|
||||
if k ~= nil then
|
||||
k = i + k
|
||||
if k < 1 or k > n then return nil end
|
||||
return tokens[k]
|
||||
end
|
||||
local tok = tokens[i]
|
||||
i = i + 1
|
||||
if tok then
|
||||
clexer.line = tok[3]
|
||||
clexer.name = name
|
||||
return tok[1],tok[2]
|
||||
end
|
||||
end
|
||||
|
||||
end
|
||||
|
||||
return clexer
|
|
@ -0,0 +1,179 @@
|
|||
--[[--- A Lua lexical scanner using LPeg.
|
||||
= CREDITS
|
||||
Written by Peter Odding, 2007/04/04
|
||||
|
||||
= THANKS TO
|
||||
- the Lua authors for a wonderful language;
|
||||
- Roberto for LPeg;
|
||||
- caffeine for keeping me awake :)
|
||||
|
||||
= LICENSE
|
||||
Shamelessly ripped from the SQLite[3] project:
|
||||
|
||||
The author disclaims copyright to this source code. In place of a legal
|
||||
notice, here is a blessing:
|
||||
|
||||
May you do good and not evil.
|
||||
May you find forgiveness for yourself and forgive others.
|
||||
May you share freely, never taking more than you give.
|
||||
|
||||
@module macro.lexer
|
||||
--]]
|
||||
|
||||
local lexer = {}
|
||||
local lpeg = require 'lpeg'
|
||||
local P, R, S, C, Cb, Cc, Cg, Cmt, Ct =
|
||||
lpeg.P, lpeg.R, lpeg.S, lpeg.C, lpeg.Cb, lpeg.Cc, lpeg.Cg, lpeg.Cmt, lpeg.Ct
|
||||
|
||||
-- create a pattern which captures the lua value [id] and the input matching
|
||||
-- [patt] in a table
|
||||
local function token(id, patt) return Ct(Cc(id) * C(patt)) end
|
||||
|
||||
-- private interface
|
||||
local table_of_tokens
|
||||
local extra_tokens
|
||||
|
||||
function lexer.add_extra_tokens(extra)
|
||||
extra_tokens = extra_tokens or {}
|
||||
for _,t in ipairs(extra) do
|
||||
table.insert(extra_tokens,t)
|
||||
end
|
||||
table_of_tokens = nil -- re-initialize
|
||||
end
|
||||
|
||||
function lexer.init ()
|
||||
local digit = R('09')
|
||||
|
||||
-- range of valid characters after first character of identifier
|
||||
--local idsafe = R('AZ', 'az', '\127\255') + P '_'
|
||||
local idsafe = R('AZ', 'az') + P '_' + R '\206\223' * R '\128\255'
|
||||
-- operators
|
||||
local OT = P '=='
|
||||
if extra_tokens then
|
||||
for _,ex in ipairs(extra_tokens) do
|
||||
OT = OT + P(ex)
|
||||
end
|
||||
end
|
||||
local operator = token('operator', OT + P '.' + P '~=' + P '<=' + P '>=' + P '...'
|
||||
+ P '..' + S '+-*/%^#=<>;:,.{}[]()')
|
||||
-- identifiers
|
||||
local ident = token('iden', idsafe * (idsafe + digit) ^ 0)
|
||||
|
||||
-- keywords
|
||||
local keyword = token('keyword', (P 'and' + P 'break' + P 'do' + P 'elseif' +
|
||||
P 'else' + P 'end' + P 'false' + P 'for' + P 'function' + P 'if' +
|
||||
P 'in' + P 'local' + P 'nil' + P 'not' + P 'or' + P 'repeat' + P 'return' +
|
||||
P 'then' + P 'true' + P 'until' + P 'while') * -(idsafe + digit))
|
||||
|
||||
-- numbers
|
||||
local number_sign = S'+-'^-1
|
||||
local number_decimal = digit ^ 1
|
||||
local number_hexadecimal = P '0' * S 'xX' * R('09', 'AF', 'af') ^ 1
|
||||
local number_float = (digit^1 * P'.' * digit^0 + P'.' * digit^1) *
|
||||
(S'eE' * number_sign * digit^1)^-1
|
||||
local number = token('number', number_hexadecimal +
|
||||
number_float +
|
||||
number_decimal)
|
||||
|
||||
-- callback for [=[ long strings ]=]
|
||||
-- ps. LPeg is for Lua what regex is for Perl, which makes me smile :)
|
||||
local equals = P '=' ^ 0
|
||||
local open = P '[' * Cg(equals, "init") * P '[' * P '\n' ^ -1
|
||||
local close = P ']' * C(equals) * P ']'
|
||||
local closeeq = Cmt(close * Cb "init", function (s, i, a, b) return a == b end)
|
||||
local longstring = open * C((P(1) - closeeq)^0) * close --/ 1
|
||||
|
||||
-- strings
|
||||
local singlequoted_string = P "'" * ((1 - S "'\r\n\f\\") + (P '\\' * 1)) ^ 0 * "'"
|
||||
local doublequoted_string = P '"' * ((1 - S '"\r\n\f\\') + (P '\\' * 1)) ^ 0 * '"'
|
||||
local string = token('string', singlequoted_string +
|
||||
doublequoted_string +
|
||||
longstring)
|
||||
|
||||
-- comments
|
||||
local singleline_comment = P '--' * (1 - S '\r\n\f') ^ 0
|
||||
local multiline_comment = P '--' * longstring
|
||||
local comment = token('comment', multiline_comment + singleline_comment)
|
||||
|
||||
-- whitespace
|
||||
local whitespace = token('space', S('\r\n\f\t ')^1)
|
||||
|
||||
-- ordered choice of all tokens and last-resort error which consumes one character
|
||||
local any_token = whitespace + number + keyword + ident +
|
||||
string + comment + operator + token('error', 1)
|
||||
|
||||
|
||||
table_of_tokens = Ct(any_token ^ 0)
|
||||
end
|
||||
|
||||
-- increment [line] by the number of line-ends in [text]
|
||||
local function sync(line, text)
|
||||
local index, limit = 1, #text
|
||||
while index <= limit do
|
||||
local start, stop = text:find('\r\n', index, true)
|
||||
if not start then
|
||||
start, stop = text:find('[\r\n\f]', index)
|
||||
if not start then break end
|
||||
end
|
||||
index = stop + 1
|
||||
line = line + 1
|
||||
end
|
||||
return line
|
||||
end
|
||||
lexer.sync = sync
|
||||
|
||||
lexer.line = 0
|
||||
|
||||
-- we only need to synchronize the line-counter for these token types
|
||||
local multiline_tokens = { comment = true, string = true, space = true }
|
||||
lexer.multiline_tokens = multiline_tokens
|
||||
|
||||
function lexer.scan_lua_tokenlist(input)
|
||||
if not table_of_tokens then
|
||||
lexer.init()
|
||||
end
|
||||
assert(type(input) == 'string', 'bad argument #1 (expected string)')
|
||||
local line = 1
|
||||
local tokens = lpeg.match(table_of_tokens, input)
|
||||
for i, token in pairs(tokens) do
|
||||
local t = token[1]
|
||||
if t == 'operator' or t == 'error' then
|
||||
token[1] = token[2]
|
||||
end
|
||||
token[3] = line
|
||||
if multiline_tokens[t] then
|
||||
line = sync(line, token[2])
|
||||
end
|
||||
end
|
||||
return tokens
|
||||
end
|
||||
|
||||
--- get a token iterator from a source containing Lua code.
|
||||
-- Note that this token iterator includes spaces and comments, and does not convert
|
||||
-- string and number tokens - so e.g. a string token is quoted and a number token is
|
||||
-- an unconverted string.
|
||||
-- @param input the source - can be a string or a file-like object (i.e. read() returns line)
|
||||
-- @param name for the source
|
||||
function lexer.scan_lua(input,name)
|
||||
if type(input) ~= 'string' and input.read then
|
||||
input = input:read('*a')
|
||||
end
|
||||
local tokens = lexer.scan_lua_tokenlist(input)
|
||||
local i, n = 1, #tokens
|
||||
return function(k)
|
||||
if k ~= nil then
|
||||
k = i + k
|
||||
if k < 1 or k > n then return nil end
|
||||
return tokens[k]
|
||||
end
|
||||
local tok = tokens[i]
|
||||
i = i + 1
|
||||
if tok then
|
||||
lexer.line = tok[3]
|
||||
lexer.name = name
|
||||
return tok[1],tok[2]
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
return lexer
|
|
@ -0,0 +1,15 @@
|
|||
#define LUA_IMPLEMENTATION
|
||||
#include "lua.h"
|
||||
|
||||
extern int luaopen_lpeg(lua_State *L);
|
||||
extern int luaopen_lfs(lua_State *L);
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
lua_State *L = luaL_newstate();
|
||||
luaL_openlibs(L);
|
||||
luaL_require(L, "lpeg", luaopen_lpeg, 1); lua_pop(L, 1);
|
||||
luaL_require(L, "lfs", luaopen_lfs, 1); lua_pop(L, 1);
|
||||
return 0;
|
||||
}
|
||||
|
59
premake5.lua
59
premake5.lua
|
@ -1,59 +0,0 @@
|
|||
workspace "l65" do
|
||||
local workspace_location = "build"
|
||||
|
||||
location(workspace_location)
|
||||
startproject "l65"
|
||||
|
||||
configurations { "debug", "release" }
|
||||
|
||||
flags { "FatalCompileWarnings", "NoPCH", "StaticRuntime" }
|
||||
|
||||
platforms { "x86", "x64" }
|
||||
filter "platforms:x86"
|
||||
architecture "x86"
|
||||
filter "platforms:x64"
|
||||
architecture "x86_64"
|
||||
filter {}
|
||||
|
||||
filter "configurations:debug"
|
||||
defines { "_DEBUG" }
|
||||
flags { "Symbols" }
|
||||
filter "configurations:release"
|
||||
defines { "NDEBUG" }
|
||||
flags { "LinkTimeOptimization", "NoBufferSecurityCheck", "NoFramePointer" }
|
||||
optimize "On"
|
||||
floatingpoint "Fast"
|
||||
vectorextensions "SSE2"
|
||||
filter {}
|
||||
|
||||
filter "action:vs*"
|
||||
defines { "WIN32", "_CRT_SECURE_NO_WARNINGS", "_CRT_SECURE_NO_DEPRECATE" }
|
||||
flags { "MultiProcessorCompile", "NoEditAndContinue", "NoIncrementalLink", "NoManifest", "NoMinimalRebuild" }
|
||||
disablewarnings { "4103", "4554", "6255", "6262", "28278" }
|
||||
buildoptions { "/volatile:iso" }
|
||||
filter {}
|
||||
|
||||
project "lua"
|
||||
location(workspace_location)
|
||||
kind "StaticLib"
|
||||
language "C"
|
||||
|
||||
filter "action:vs*"
|
||||
disablewarnings { "4244", "4702" }
|
||||
filter {}
|
||||
|
||||
src = "src/lua"
|
||||
includedirs { src }
|
||||
files { src .. "/**.h", src .. "/**.c" }
|
||||
|
||||
project "l65"
|
||||
location(workspace_location)
|
||||
kind "ConsoleApp"
|
||||
language "C"
|
||||
targetdir "build/bin"
|
||||
|
||||
includedirs { "src/lua" }
|
||||
files { "src/main.c" }
|
||||
|
||||
links { "lua" }
|
||||
end
|
|
@ -1,166 +0,0 @@
|
|||
-- Copyright (c) 2009 Aleksey Cheusov <vle@gmx.net>
|
||||
--
|
||||
-- Permission is hereby granted, free of charge, to any person obtaining
|
||||
-- a copy of this software and associated documentation files (the
|
||||
-- "Software"), to deal in the Software without restriction, including
|
||||
-- without limitation the rights to use, copy, modify, merge, publish,
|
||||
-- distribute, sublicense, and/or sell copies of the Software, and to
|
||||
-- permit persons to whom the Software is furnished to do so, subject to
|
||||
-- the following conditions:
|
||||
--
|
||||
-- The above copyright notice and this permission notice shall be
|
||||
-- included in all copies or substantial portions of the Software.
|
||||
--
|
||||
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||||
-- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||||
-- NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
||||
-- LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
||||
-- OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
||||
-- WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||||
|
||||
local type, pairs, ipairs, io, os = type, pairs, ipairs, io, os
|
||||
|
||||
module ("alt_getopt")
|
||||
|
||||
local function convert_short2long (opts)
|
||||
local i = 1
|
||||
local len = #opts
|
||||
local ret = {}
|
||||
|
||||
for short_opt, accept_arg in opts:gmatch("(%w)(:?)") do
|
||||
ret[short_opt]=#accept_arg
|
||||
end
|
||||
|
||||
return ret
|
||||
end
|
||||
|
||||
local function exit_with_error (msg, exit_status)
|
||||
io.stderr:write (msg)
|
||||
os.exit (exit_status)
|
||||
end
|
||||
|
||||
local function err_unknown_opt (opt)
|
||||
exit_with_error ("Unknown option `-" ..
|
||||
(#opt > 1 and "-" or "") .. opt .. "'\n", 1)
|
||||
end
|
||||
|
||||
local function canonize (options, opt)
|
||||
if not options [opt] then
|
||||
err_unknown_opt (opt)
|
||||
end
|
||||
|
||||
while type (options [opt]) == "string" do
|
||||
opt = options [opt]
|
||||
|
||||
if not options [opt] then
|
||||
err_unknown_opt (opt)
|
||||
end
|
||||
end
|
||||
|
||||
return opt
|
||||
end
|
||||
|
||||
function get_ordered_opts (arg, sh_opts, long_opts)
|
||||
local i = 1
|
||||
local count = 1
|
||||
local opts = {}
|
||||
local optarg = {}
|
||||
|
||||
local options = convert_short2long (sh_opts)
|
||||
for k,v in pairs (long_opts) do
|
||||
options [k] = v
|
||||
end
|
||||
|
||||
while i <= #arg do
|
||||
local a = arg [i]
|
||||
|
||||
if a == "--" then
|
||||
i = i + 1
|
||||
break
|
||||
|
||||
elseif a == "-" then
|
||||
break
|
||||
|
||||
elseif a:sub (1, 2) == "--" then
|
||||
local pos = a:find ("=", 1, true)
|
||||
|
||||
if pos then
|
||||
local opt = a:sub (3, pos-1)
|
||||
|
||||
opt = canonize (options, opt)
|
||||
|
||||
if options [opt] == 0 then
|
||||
exit_with_error ("Bad usage of option `" .. a .. "'\n", 1)
|
||||
end
|
||||
|
||||
optarg [count] = a:sub (pos+1)
|
||||
opts [count] = opt
|
||||
else
|
||||
local opt = a:sub (3)
|
||||
|
||||
opt = canonize (options, opt)
|
||||
|
||||
if options [opt] == 0 then
|
||||
opts [count] = opt
|
||||
else
|
||||
if i == #arg then
|
||||
exit_with_error ("Missed value for option `" .. a .. "'\n", 1)
|
||||
end
|
||||
|
||||
optarg [count] = arg [i+1]
|
||||
opts [count] = opt
|
||||
i = i + 1
|
||||
end
|
||||
end
|
||||
count = count + 1
|
||||
|
||||
elseif a:sub (1, 1) == "-" then
|
||||
local j
|
||||
for j=2,a:len () do
|
||||
local opt = canonize (options, a:sub (j, j))
|
||||
|
||||
if options [opt] == 0 then
|
||||
opts [count] = opt
|
||||
count = count + 1
|
||||
elseif a:len () == j then
|
||||
if i == #arg then
|
||||
exit_with_error ("Missed value for option `-" .. opt .. "'\n", 1)
|
||||
end
|
||||
|
||||
optarg [count] = arg [i+1]
|
||||
opts [count] = opt
|
||||
i = i + 1
|
||||
count = count + 1
|
||||
break
|
||||
else
|
||||
optarg [count] = a:sub (j+1)
|
||||
opts [count] = opt
|
||||
count = count + 1
|
||||
break
|
||||
end
|
||||
end
|
||||
else
|
||||
break
|
||||
end
|
||||
|
||||
i = i + 1
|
||||
end
|
||||
|
||||
return opts,i,optarg
|
||||
end
|
||||
|
||||
function get_opts (arg, sh_opts, long_opts)
|
||||
local ret = {}
|
||||
|
||||
local opts,optind,optarg = get_ordered_opts (arg, sh_opts, long_opts)
|
||||
for i,v in ipairs (opts) do
|
||||
if optarg [i] then
|
||||
ret [v] = optarg [i]
|
||||
else
|
||||
ret [v] = 1
|
||||
end
|
||||
end
|
||||
|
||||
return ret,optind
|
||||
end
|
|
@ -1,59 +0,0 @@
|
|||
--------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
-- Alternative implementation of checks() in Lua. Slower than
|
||||
-- the C counterpart, but no compilation/porting concerns.
|
||||
|
||||
checkers = { }
|
||||
|
||||
local function check_one(expected, val)
|
||||
if type(val)==expected then return true end
|
||||
local mt = getmetatable(val)
|
||||
if mt and mt.__type==expected then return true end
|
||||
local f = checkers[expected]
|
||||
if f and f(val) then return true end
|
||||
return false
|
||||
end
|
||||
|
||||
local function check_many(name, expected, val)
|
||||
if expected=='?' then return true
|
||||
elseif expected=='!' then return (val~=nil)
|
||||
elseif type(expected) ~= 'string' then
|
||||
error 'strings expected by checks()'
|
||||
elseif val==nil and expected :sub(1,1) == '?' then return true end
|
||||
for one in expected :gmatch "[^|?]+" do
|
||||
if check_one(one, val) then return true end
|
||||
end
|
||||
return false
|
||||
end
|
||||
|
||||
function checks(...)
|
||||
for i, arg in ipairs{...} do
|
||||
local name, val = debug.getlocal(2, i)
|
||||
local success = check_many(name, arg, val)
|
||||
if not success then
|
||||
local fname = debug.getinfo(2, 'n').name
|
||||
local fmt = "bad argument #%d to '%s' (%s expected, got %s)"
|
||||
local msg = string.format(fmt, i, fname or "?", arg, type(val))
|
||||
error(msg, 3)
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
return checks
|
191
src/lua/bit.c
191
src/lua/bit.c
|
@ -1,191 +0,0 @@
|
|||
/*
|
||||
** Lua BitOp -- a bit operations library for Lua 5.1/5.2.
|
||||
** http://bitop.luajit.org/
|
||||
**
|
||||
** Copyright (C) 2008-2012 Mike Pall. All rights reserved.
|
||||
**
|
||||
** Permission is hereby granted, free of charge, to any person obtaining
|
||||
** a copy of this software and associated documentation files (the
|
||||
** "Software"), to deal in the Software without restriction, including
|
||||
** without limitation the rights to use, copy, modify, merge, publish,
|
||||
** distribute, sublicense, and/or sell copies of the Software, and to
|
||||
** permit persons to whom the Software is furnished to do so, subject to
|
||||
** the following conditions:
|
||||
**
|
||||
** The above copyright notice and this permission notice shall be
|
||||
** included in all copies or substantial portions of the Software.
|
||||
**
|
||||
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||||
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
||||
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
||||
** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
||||
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
||||
** SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||||
**
|
||||
** [ MIT license: http://www.opensource.org/licenses/mit-license.php ]
|
||||
*/
|
||||
|
||||
#define LUA_BITOP_VERSION "1.0.2"
|
||||
|
||||
#define LUA_LIB
|
||||
#include "lua.h"
|
||||
#include "lauxlib.h"
|
||||
|
||||
#ifdef _MSC_VER
|
||||
/* MSVC is stuck in the last century and doesn't have C99's stdint.h. */
|
||||
typedef __int32 int32_t;
|
||||
typedef unsigned __int32 uint32_t;
|
||||
typedef unsigned __int64 uint64_t;
|
||||
#else
|
||||
#include <stdint.h>
|
||||
#endif
|
||||
|
||||
typedef int32_t SBits;
|
||||
typedef uint32_t UBits;
|
||||
|
||||
typedef union {
|
||||
lua_Number n;
|
||||
#ifdef LUA_NUMBER_DOUBLE
|
||||
uint64_t b;
|
||||
#else
|
||||
UBits b;
|
||||
#endif
|
||||
} BitNum;
|
||||
|
||||
/* Convert argument to bit type. */
|
||||
static UBits barg(lua_State *L, int idx)
|
||||
{
|
||||
BitNum bn;
|
||||
UBits b;
|
||||
#if LUA_VERSION_NUM < 502
|
||||
bn.n = lua_tonumber(L, idx);
|
||||
#else
|
||||
bn.n = luaL_checknumber(L, idx);
|
||||
#endif
|
||||
#if defined(LUA_NUMBER_DOUBLE)
|
||||
bn.n += 6755399441055744.0; /* 2^52+2^51 */
|
||||
#ifdef SWAPPED_DOUBLE
|
||||
b = (UBits)(bn.b >> 32);
|
||||
#else
|
||||
b = (UBits)bn.b;
|
||||
#endif
|
||||
#elif defined(LUA_NUMBER_INT) || defined(LUA_NUMBER_LONG) || \
|
||||
defined(LUA_NUMBER_LONGLONG) || defined(LUA_NUMBER_LONG_LONG) || \
|
||||
defined(LUA_NUMBER_LLONG)
|
||||
if (sizeof(UBits) == sizeof(lua_Number))
|
||||
b = bn.b;
|
||||
else
|
||||
b = (UBits)(SBits)bn.n;
|
||||
#elif defined(LUA_NUMBER_FLOAT)
|
||||
#error "A 'float' lua_Number type is incompatible with this library"
|
||||
#else
|
||||
#error "Unknown number type, check LUA_NUMBER_* in luaconf.h"
|
||||
#endif
|
||||
#if LUA_VERSION_NUM < 502
|
||||
if (b == 0 && !lua_isnumber(L, idx)) {
|
||||
luaL_typerror(L, idx, "number");
|
||||
}
|
||||
#endif
|
||||
return b;
|
||||
}
|
||||
|
||||
/* Return bit type. */
|
||||
#define BRET(b) lua_pushnumber(L, (lua_Number)(SBits)(b)); return 1;
|
||||
|
||||
static int bit_tobit(lua_State *L) { BRET(barg(L, 1)) }
|
||||
static int bit_bnot(lua_State *L) { BRET(~barg(L, 1)) }
|
||||
|
||||
#define BIT_OP(func, opr) \
|
||||
static int func(lua_State *L) { int i; UBits b = barg(L, 1); \
|
||||
for (i = lua_gettop(L); i > 1; i--) b opr barg(L, i); BRET(b) }
|
||||
BIT_OP(bit_band, &=)
|
||||
BIT_OP(bit_bor, |=)
|
||||
BIT_OP(bit_bxor, ^=)
|
||||
BIT_OP(bit_idiv, /=)
|
||||
|
||||
#define bshl(b, n) (b << n)
|
||||
#define bshr(b, n) (b >> n)
|
||||
#define bsar(b, n) ((SBits)b >> n)
|
||||
#define brol(b, n) ((b << n) | (b >> (32-n)))
|
||||
#define bror(b, n) ((b << (32-n)) | (b >> n))
|
||||
#define BIT_SH(func, fn) \
|
||||
static int func(lua_State *L) { \
|
||||
UBits b = barg(L, 1); UBits n = barg(L, 2) & 31; BRET(fn(b, n)) }
|
||||
BIT_SH(bit_lshift, bshl)
|
||||
BIT_SH(bit_rshift, bshr)
|
||||
BIT_SH(bit_arshift, bsar)
|
||||
BIT_SH(bit_rol, brol)
|
||||
BIT_SH(bit_ror, bror)
|
||||
|
||||
static int bit_bswap(lua_State *L)
|
||||
{
|
||||
UBits b = barg(L, 1);
|
||||
b = (b >> 24) | ((b >> 8) & 0xff00) | ((b & 0xff00) << 8) | (b << 24);
|
||||
BRET(b)
|
||||
}
|
||||
|
||||
static int bit_tohex(lua_State *L)
|
||||
{
|
||||
UBits b = barg(L, 1);
|
||||
SBits n = lua_isnone(L, 2) ? 8 : (SBits)barg(L, 2);
|
||||
const char *hexdigits = "0123456789abcdef";
|
||||
char buf[8];
|
||||
int i;
|
||||
if (n < 0) { n = -n; hexdigits = "0123456789ABCDEF"; }
|
||||
if (n > 8) n = 8;
|
||||
for (i = (int)n; --i >= 0; ) { buf[i] = hexdigits[b & 15]; b >>= 4; }
|
||||
lua_pushlstring(L, buf, (size_t)n);
|
||||
return 1;
|
||||
}
|
||||
|
||||
static const struct luaL_Reg bit_funcs[] = {
|
||||
{ "tobit", bit_tobit },
|
||||
{ "bnot", bit_bnot },
|
||||
{ "band", bit_band },
|
||||
{ "bor", bit_bor },
|
||||
{ "bxor", bit_bxor },
|
||||
{ "lshift", bit_lshift },
|
||||
{ "rshift", bit_rshift },
|
||||
{ "arshift", bit_arshift },
|
||||
{ "rol", bit_rol },
|
||||
{ "ror", bit_ror },
|
||||
{ "bswap", bit_bswap },
|
||||
{ "tohex", bit_tohex },
|
||||
{ "idiv", bit_idiv },
|
||||
{ NULL, NULL }
|
||||
};
|
||||
|
||||
/* Signed right-shifts are implementation-defined per C89/C99.
|
||||
** But the de facto standard are arithmetic right-shifts on two's
|
||||
** complement CPUs. This behaviour is required here, so test for it.
|
||||
*/
|
||||
#define BAD_SAR (bsar(-8, 2) != (SBits)-2)
|
||||
|
||||
LUALIB_API int luaopen_bit(lua_State *L)
|
||||
{
|
||||
UBits b;
|
||||
lua_pushnumber(L, (lua_Number)1437217655L);
|
||||
b = barg(L, -1);
|
||||
if (b != (UBits)1437217655L || BAD_SAR) { /* Perform a simple self-test. */
|
||||
const char *msg = "compiled with incompatible luaconf.h";
|
||||
#ifdef LUA_NUMBER_DOUBLE
|
||||
#ifdef _WIN32
|
||||
if (b == (UBits)1610612736L)
|
||||
msg = "use D3DCREATE_FPU_PRESERVE with DirectX";
|
||||
#endif
|
||||
if (b == (UBits)1127743488L)
|
||||
msg = "not compiled with SWAPPED_DOUBLE";
|
||||
#endif
|
||||
if (BAD_SAR)
|
||||
msg = "arithmetic right-shift broken";
|
||||
luaL_error(L, "bit library self-test failed (%s)", msg);
|
||||
}
|
||||
#if LUA_VERSION_NUM < 502
|
||||
luaL_register(L, "bit", bit_funcs);
|
||||
#else
|
||||
luaL_newlib(L, bit_funcs);
|
||||
#endif
|
||||
return 1;
|
||||
}
|
||||
|
1087
src/lua/lapi.c
1087
src/lua/lapi.c
File diff suppressed because it is too large
Load Diff
|
@ -1,16 +0,0 @@
|
|||
/*
|
||||
** $Id: lapi.h,v 2.2.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Auxiliary functions from Lua API
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef lapi_h
|
||||
#define lapi_h
|
||||
|
||||
|
||||
#include "lobject.h"
|
||||
|
||||
|
||||
LUAI_FUNC void luaA_pushobject (lua_State *L, const TValue *o);
|
||||
|
||||
#endif
|
|
@ -1,652 +0,0 @@
|
|||
/*
|
||||
** $Id: lauxlib.c,v 1.159.1.3 2008/01/21 13:20:51 roberto Exp $
|
||||
** Auxiliary functions for building Lua libraries
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <ctype.h>
|
||||
#include <errno.h>
|
||||
#include <stdarg.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
|
||||
/* This file uses only the official API of Lua.
|
||||
** Any function declared here could be written as an application function.
|
||||
*/
|
||||
|
||||
#define lauxlib_c
|
||||
#define LUA_LIB
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lauxlib.h"
|
||||
|
||||
|
||||
#define FREELIST_REF 0 /* free list of references */
|
||||
|
||||
|
||||
/* convert a stack index to positive */
|
||||
#define abs_index(L, i) ((i) > 0 || (i) <= LUA_REGISTRYINDEX ? (i) : \
|
||||
lua_gettop(L) + (i) + 1)
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** Error-report functions
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
|
||||
LUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) {
|
||||
lua_Debug ar;
|
||||
if (!lua_getstack(L, 0, &ar)) /* no stack frame? */
|
||||
return luaL_error(L, "bad argument #%d (%s)", narg, extramsg);
|
||||
lua_getinfo(L, "n", &ar);
|
||||
if (strcmp(ar.namewhat, "method") == 0) {
|
||||
narg--; /* do not count `self' */
|
||||
if (narg == 0) /* error is in the self argument itself? */
|
||||
return luaL_error(L, "calling " LUA_QS " on bad self (%s)",
|
||||
ar.name, extramsg);
|
||||
}
|
||||
if (ar.name == NULL)
|
||||
ar.name = "?";
|
||||
return luaL_error(L, "bad argument #%d to " LUA_QS " (%s)",
|
||||
narg, ar.name, extramsg);
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API int luaL_typerror (lua_State *L, int narg, const char *tname) {
|
||||
const char *msg = lua_pushfstring(L, "%s expected, got %s",
|
||||
tname, luaL_typename(L, narg));
|
||||
return luaL_argerror(L, narg, msg);
|
||||
}
|
||||
|
||||
|
||||
static void tag_error (lua_State *L, int narg, int tag) {
|
||||
luaL_typerror(L, narg, lua_typename(L, tag));
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void luaL_where (lua_State *L, int level) {
|
||||
lua_Debug ar;
|
||||
if (lua_getstack(L, level, &ar)) { /* check function at level */
|
||||
lua_getinfo(L, "Sl", &ar); /* get info about it */
|
||||
if (ar.currentline > 0) { /* is there info? */
|
||||
lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline);
|
||||
return;
|
||||
}
|
||||
}
|
||||
lua_pushliteral(L, ""); /* else, no information available... */
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) {
|
||||
va_list argp;
|
||||
va_start(argp, fmt);
|
||||
luaL_where(L, 1);
|
||||
lua_pushvfstring(L, fmt, argp);
|
||||
va_end(argp);
|
||||
lua_concat(L, 2);
|
||||
return lua_error(L);
|
||||
}
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
LUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def,
|
||||
const char *const lst[]) {
|
||||
const char *name = (def) ? luaL_optstring(L, narg, def) :
|
||||
luaL_checkstring(L, narg);
|
||||
int i;
|
||||
for (i=0; lst[i]; i++)
|
||||
if (strcmp(lst[i], name) == 0)
|
||||
return i;
|
||||
return luaL_argerror(L, narg,
|
||||
lua_pushfstring(L, "invalid option " LUA_QS, name));
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) {
|
||||
lua_getfield(L, LUA_REGISTRYINDEX, tname); /* get registry.name */
|
||||
if (!lua_isnil(L, -1)) /* name already in use? */
|
||||
return 0; /* leave previous value on top, but return 0 */
|
||||
lua_pop(L, 1);
|
||||
lua_newtable(L); /* create metatable */
|
||||
lua_pushvalue(L, -1);
|
||||
lua_setfield(L, LUA_REGISTRYINDEX, tname); /* registry.name = metatable */
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) {
|
||||
void *p = lua_touserdata(L, ud);
|
||||
if (p != NULL) { /* value is a userdata? */
|
||||
if (lua_getmetatable(L, ud)) { /* does it have a metatable? */
|
||||
lua_getfield(L, LUA_REGISTRYINDEX, tname); /* get correct metatable */
|
||||
if (lua_rawequal(L, -1, -2)) { /* does it have the correct mt? */
|
||||
lua_pop(L, 2); /* remove both metatables */
|
||||
return p;
|
||||
}
|
||||
}
|
||||
}
|
||||
luaL_typerror(L, ud, tname); /* else error */
|
||||
return NULL; /* to avoid warnings */
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *mes) {
|
||||
if (!lua_checkstack(L, space))
|
||||
luaL_error(L, "stack overflow (%s)", mes);
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void luaL_checktype (lua_State *L, int narg, int t) {
|
||||
if (lua_type(L, narg) != t)
|
||||
tag_error(L, narg, t);
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void luaL_checkany (lua_State *L, int narg) {
|
||||
if (lua_type(L, narg) == LUA_TNONE)
|
||||
luaL_argerror(L, narg, "value expected");
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) {
|
||||
const char *s = lua_tolstring(L, narg, len);
|
||||
if (!s) tag_error(L, narg, LUA_TSTRING);
|
||||
return s;
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API const char *luaL_optlstring (lua_State *L, int narg,
|
||||
const char *def, size_t *len) {
|
||||
if (lua_isnoneornil(L, narg)) {
|
||||
if (len)
|
||||
*len = (def ? strlen(def) : 0);
|
||||
return def;
|
||||
}
|
||||
else return luaL_checklstring(L, narg, len);
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) {
|
||||
lua_Number d = lua_tonumber(L, narg);
|
||||
if (d == 0 && !lua_isnumber(L, narg)) /* avoid extra test when d is not 0 */
|
||||
tag_error(L, narg, LUA_TNUMBER);
|
||||
return d;
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) {
|
||||
return luaL_opt(L, luaL_checknumber, narg, def);
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int narg) {
|
||||
lua_Integer d = lua_tointeger(L, narg);
|
||||
if (d == 0 && !lua_isnumber(L, narg)) /* avoid extra test when d is not 0 */
|
||||
tag_error(L, narg, LUA_TNUMBER);
|
||||
return d;
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int narg,
|
||||
lua_Integer def) {
|
||||
return luaL_opt(L, luaL_checkinteger, narg, def);
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) {
|
||||
if (!lua_getmetatable(L, obj)) /* no metatable? */
|
||||
return 0;
|
||||
lua_pushstring(L, event);
|
||||
lua_rawget(L, -2);
|
||||
if (lua_isnil(L, -1)) {
|
||||
lua_pop(L, 2); /* remove metatable and metafield */
|
||||
return 0;
|
||||
}
|
||||
else {
|
||||
lua_remove(L, -2); /* remove only metatable */
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {
|
||||
obj = abs_index(L, obj);
|
||||
if (!luaL_getmetafield(L, obj, event)) /* no metafield? */
|
||||
return 0;
|
||||
lua_pushvalue(L, obj);
|
||||
lua_call(L, 1, 1);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void (luaL_register) (lua_State *L, const char *libname,
|
||||
const luaL_Reg *l) {
|
||||
luaI_openlib(L, libname, l, 0);
|
||||
}
|
||||
|
||||
|
||||
static int libsize (const luaL_Reg *l) {
|
||||
int size = 0;
|
||||
for (; l->name; l++) size++;
|
||||
return size;
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void luaI_openlib (lua_State *L, const char *libname,
|
||||
const luaL_Reg *l, int nup) {
|
||||
if (libname) {
|
||||
int size = libsize(l);
|
||||
/* check whether lib already exists */
|
||||
luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1);
|
||||
lua_getfield(L, -1, libname); /* get _LOADED[libname] */
|
||||
if (!lua_istable(L, -1)) { /* not found? */
|
||||
lua_pop(L, 1); /* remove previous result */
|
||||
/* try global variable (and create one if it does not exist) */
|
||||
if (luaL_findtable(L, LUA_GLOBALSINDEX, libname, size) != NULL)
|
||||
luaL_error(L, "name conflict for module " LUA_QS, libname);
|
||||
lua_pushvalue(L, -1);
|
||||
lua_setfield(L, -3, libname); /* _LOADED[libname] = new table */
|
||||
}
|
||||
lua_remove(L, -2); /* remove _LOADED table */
|
||||
lua_insert(L, -(nup+1)); /* move library table to below upvalues */
|
||||
}
|
||||
for (; l->name; l++) {
|
||||
int i;
|
||||
for (i=0; i<nup; i++) /* copy upvalues to the top */
|
||||
lua_pushvalue(L, -nup);
|
||||
lua_pushcclosure(L, l->func, nup);
|
||||
lua_setfield(L, -(nup+2), l->name);
|
||||
}
|
||||
lua_pop(L, nup); /* remove upvalues */
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** getn-setn: size for arrays
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
#if defined(LUA_COMPAT_GETN)
|
||||
|
||||
static int checkint (lua_State *L, int topop) {
|
||||
int n = (lua_type(L, -1) == LUA_TNUMBER) ? lua_tointeger(L, -1) : -1;
|
||||
lua_pop(L, topop);
|
||||
return n;
|
||||
}
|
||||
|
||||
|
||||
static void getsizes (lua_State *L) {
|
||||
lua_getfield(L, LUA_REGISTRYINDEX, "LUA_SIZES");
|
||||
if (lua_isnil(L, -1)) { /* no `size' table? */
|
||||
lua_pop(L, 1); /* remove nil */
|
||||
lua_newtable(L); /* create it */
|
||||
lua_pushvalue(L, -1); /* `size' will be its own metatable */
|
||||
lua_setmetatable(L, -2);
|
||||
lua_pushliteral(L, "kv");
|
||||
lua_setfield(L, -2, "__mode"); /* metatable(N).__mode = "kv" */
|
||||
lua_pushvalue(L, -1);
|
||||
lua_setfield(L, LUA_REGISTRYINDEX, "LUA_SIZES"); /* store in register */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void luaL_setn (lua_State *L, int t, int n) {
|
||||
t = abs_index(L, t);
|
||||
lua_pushliteral(L, "n");
|
||||
lua_rawget(L, t);
|
||||
if (checkint(L, 1) >= 0) { /* is there a numeric field `n'? */
|
||||
lua_pushliteral(L, "n"); /* use it */
|
||||
lua_pushinteger(L, n);
|
||||
lua_rawset(L, t);
|
||||
}
|
||||
else { /* use `sizes' */
|
||||
getsizes(L);
|
||||
lua_pushvalue(L, t);
|
||||
lua_pushinteger(L, n);
|
||||
lua_rawset(L, -3); /* sizes[t] = n */
|
||||
lua_pop(L, 1); /* remove `sizes' */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API int luaL_getn (lua_State *L, int t) {
|
||||
int n;
|
||||
t = abs_index(L, t);
|
||||
lua_pushliteral(L, "n"); /* try t.n */
|
||||
lua_rawget(L, t);
|
||||
if ((n = checkint(L, 1)) >= 0) return n;
|
||||
getsizes(L); /* else try sizes[t] */
|
||||
lua_pushvalue(L, t);
|
||||
lua_rawget(L, -2);
|
||||
if ((n = checkint(L, 2)) >= 0) return n;
|
||||
return (int)lua_objlen(L, t);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
|
||||
LUALIB_API const char *luaL_gsub (lua_State *L, const char *s, const char *p,
|
||||
const char *r) {
|
||||
const char *wild;
|
||||
size_t l = strlen(p);
|
||||
luaL_Buffer b;
|
||||
luaL_buffinit(L, &b);
|
||||
while ((wild = strstr(s, p)) != NULL) {
|
||||
luaL_addlstring(&b, s, wild - s); /* push prefix */
|
||||
luaL_addstring(&b, r); /* push replacement in place of pattern */
|
||||
s = wild + l; /* continue after `p' */
|
||||
}
|
||||
luaL_addstring(&b, s); /* push last suffix */
|
||||
luaL_pushresult(&b);
|
||||
return lua_tostring(L, -1);
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API const char *luaL_findtable (lua_State *L, int idx,
|
||||
const char *fname, int szhint) {
|
||||
const char *e;
|
||||
lua_pushvalue(L, idx);
|
||||
do {
|
||||
e = strchr(fname, '.');
|
||||
if (e == NULL) e = fname + strlen(fname);
|
||||
lua_pushlstring(L, fname, e - fname);
|
||||
lua_rawget(L, -2);
|
||||
if (lua_isnil(L, -1)) { /* no such field? */
|
||||
lua_pop(L, 1); /* remove this nil */
|
||||
lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */
|
||||
lua_pushlstring(L, fname, e - fname);
|
||||
lua_pushvalue(L, -2);
|
||||
lua_settable(L, -4); /* set new table into field */
|
||||
}
|
||||
else if (!lua_istable(L, -1)) { /* field has a non-table value? */
|
||||
lua_pop(L, 2); /* remove table and value */
|
||||
return fname; /* return problematic part of the name */
|
||||
}
|
||||
lua_remove(L, -2); /* remove previous table */
|
||||
fname = e + 1;
|
||||
} while (*e == '.');
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** Generic Buffer manipulation
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
|
||||
#define bufflen(B) ((B)->p - (B)->buffer)
|
||||
#define bufffree(B) ((size_t)(LUAL_BUFFERSIZE - bufflen(B)))
|
||||
|
||||
#define LIMIT (LUA_MINSTACK/2)
|
||||
|
||||
|
||||
static int emptybuffer (luaL_Buffer *B) {
|
||||
size_t l = bufflen(B);
|
||||
if (l == 0) return 0; /* put nothing on stack */
|
||||
else {
|
||||
lua_pushlstring(B->L, B->buffer, l);
|
||||
B->p = B->buffer;
|
||||
B->lvl++;
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void adjuststack (luaL_Buffer *B) {
|
||||
if (B->lvl > 1) {
|
||||
lua_State *L = B->L;
|
||||
int toget = 1; /* number of levels to concat */
|
||||
size_t toplen = lua_strlen(L, -1);
|
||||
do {
|
||||
size_t l = lua_strlen(L, -(toget+1));
|
||||
if (B->lvl - toget + 1 >= LIMIT || toplen > l) {
|
||||
toplen += l;
|
||||
toget++;
|
||||
}
|
||||
else break;
|
||||
} while (toget < B->lvl);
|
||||
lua_concat(L, toget);
|
||||
B->lvl = B->lvl - toget + 1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API char *luaL_prepbuffer (luaL_Buffer *B) {
|
||||
if (emptybuffer(B))
|
||||
adjuststack(B);
|
||||
return B->buffer;
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) {
|
||||
while (l--)
|
||||
luaL_addchar(B, *s++);
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) {
|
||||
luaL_addlstring(B, s, strlen(s));
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void luaL_pushresult (luaL_Buffer *B) {
|
||||
emptybuffer(B);
|
||||
lua_concat(B->L, B->lvl);
|
||||
B->lvl = 1;
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void luaL_addvalue (luaL_Buffer *B) {
|
||||
lua_State *L = B->L;
|
||||
size_t vl;
|
||||
const char *s = lua_tolstring(L, -1, &vl);
|
||||
if (vl <= bufffree(B)) { /* fit into buffer? */
|
||||
memcpy(B->p, s, vl); /* put it there */
|
||||
B->p += vl;
|
||||
lua_pop(L, 1); /* remove from stack */
|
||||
}
|
||||
else {
|
||||
if (emptybuffer(B))
|
||||
lua_insert(L, -2); /* put buffer before new value */
|
||||
B->lvl++; /* add new value into B stack */
|
||||
adjuststack(B);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) {
|
||||
B->L = L;
|
||||
B->p = B->buffer;
|
||||
B->lvl = 0;
|
||||
}
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
LUALIB_API int luaL_ref (lua_State *L, int t) {
|
||||
int ref;
|
||||
t = abs_index(L, t);
|
||||
if (lua_isnil(L, -1)) {
|
||||
lua_pop(L, 1); /* remove from stack */
|
||||
return LUA_REFNIL; /* `nil' has a unique fixed reference */
|
||||
}
|
||||
lua_rawgeti(L, t, FREELIST_REF); /* get first free element */
|
||||
ref = (int)lua_tointeger(L, -1); /* ref = t[FREELIST_REF] */
|
||||
lua_pop(L, 1); /* remove it from stack */
|
||||
if (ref != 0) { /* any free element? */
|
||||
lua_rawgeti(L, t, ref); /* remove it from list */
|
||||
lua_rawseti(L, t, FREELIST_REF); /* (t[FREELIST_REF] = t[ref]) */
|
||||
}
|
||||
else { /* no free elements */
|
||||
ref = (int)lua_objlen(L, t);
|
||||
ref++; /* create new reference */
|
||||
}
|
||||
lua_rawseti(L, t, ref);
|
||||
return ref;
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API void luaL_unref (lua_State *L, int t, int ref) {
|
||||
if (ref >= 0) {
|
||||
t = abs_index(L, t);
|
||||
lua_rawgeti(L, t, FREELIST_REF);
|
||||
lua_rawseti(L, t, ref); /* t[ref] = t[FREELIST_REF] */
|
||||
lua_pushinteger(L, ref);
|
||||
lua_rawseti(L, t, FREELIST_REF); /* t[FREELIST_REF] = ref */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** Load functions
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
typedef struct LoadF {
|
||||
int extraline;
|
||||
FILE *f;
|
||||
char buff[LUAL_BUFFERSIZE];
|
||||
} LoadF;
|
||||
|
||||
|
||||
static const char *getF (lua_State *L, void *ud, size_t *size) {
|
||||
LoadF *lf = (LoadF *)ud;
|
||||
(void)L;
|
||||
if (lf->extraline) {
|
||||
lf->extraline = 0;
|
||||
*size = 1;
|
||||
return "\n";
|
||||
}
|
||||
if (feof(lf->f)) return NULL;
|
||||
*size = fread(lf->buff, 1, sizeof(lf->buff), lf->f);
|
||||
return (*size > 0) ? lf->buff : NULL;
|
||||
}
|
||||
|
||||
|
||||
static int errfile (lua_State *L, const char *what, int fnameindex) {
|
||||
const char *serr = strerror(errno);
|
||||
const char *filename = lua_tostring(L, fnameindex) + 1;
|
||||
lua_pushfstring(L, "cannot %s %s: %s", what, filename, serr);
|
||||
lua_remove(L, fnameindex);
|
||||
return LUA_ERRFILE;
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API int luaL_loadfile (lua_State *L, const char *filename) {
|
||||
LoadF lf;
|
||||
int status, readstatus;
|
||||
int c;
|
||||
int fnameindex = lua_gettop(L) + 1; /* index of filename on the stack */
|
||||
lf.extraline = 0;
|
||||
if (filename == NULL) {
|
||||
lua_pushliteral(L, "=stdin");
|
||||
lf.f = stdin;
|
||||
}
|
||||
else {
|
||||
lua_pushfstring(L, "@%s", filename);
|
||||
lf.f = fopen(filename, "r");
|
||||
if (lf.f == NULL) return errfile(L, "open", fnameindex);
|
||||
}
|
||||
c = getc(lf.f);
|
||||
if (c == '#') { /* Unix exec. file? */
|
||||
lf.extraline = 1;
|
||||
while ((c = getc(lf.f)) != EOF && c != '\n') ; /* skip first line */
|
||||
if (c == '\n') c = getc(lf.f);
|
||||
}
|
||||
if (c == LUA_SIGNATURE[0] && filename) { /* binary file? */
|
||||
lf.f = freopen(filename, "rb", lf.f); /* reopen in binary mode */
|
||||
if (lf.f == NULL) return errfile(L, "reopen", fnameindex);
|
||||
/* skip eventual `#!...' */
|
||||
while ((c = getc(lf.f)) != EOF && c != LUA_SIGNATURE[0]) ;
|
||||
lf.extraline = 0;
|
||||
}
|
||||
ungetc(c, lf.f);
|
||||
status = lua_load(L, getF, &lf, lua_tostring(L, -1));
|
||||
readstatus = ferror(lf.f);
|
||||
if (filename) fclose(lf.f); /* close file (even in case of errors) */
|
||||
if (readstatus) {
|
||||
lua_settop(L, fnameindex); /* ignore results from `lua_load' */
|
||||
return errfile(L, "read", fnameindex);
|
||||
}
|
||||
lua_remove(L, fnameindex);
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
typedef struct LoadS {
|
||||
const char *s;
|
||||
size_t size;
|
||||
} LoadS;
|
||||
|
||||
|
||||
static const char *getS (lua_State *L, void *ud, size_t *size) {
|
||||
LoadS *ls = (LoadS *)ud;
|
||||
(void)L;
|
||||
if (ls->size == 0) return NULL;
|
||||
*size = ls->size;
|
||||
ls->size = 0;
|
||||
return ls->s;
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API int luaL_loadbuffer (lua_State *L, const char *buff, size_t size,
|
||||
const char *name) {
|
||||
LoadS ls;
|
||||
ls.s = buff;
|
||||
ls.size = size;
|
||||
return lua_load(L, getS, &ls, name);
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s) {
|
||||
return luaL_loadbuffer(L, s, strlen(s), s);
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
static void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) {
|
||||
(void)ud;
|
||||
(void)osize;
|
||||
if (nsize == 0) {
|
||||
free(ptr);
|
||||
return NULL;
|
||||
}
|
||||
else
|
||||
return realloc(ptr, nsize);
|
||||
}
|
||||
|
||||
|
||||
static int panic (lua_State *L) {
|
||||
(void)L; /* to avoid warnings */
|
||||
fprintf(stderr, "PANIC: unprotected error in call to Lua API (%s)\n",
|
||||
lua_tostring(L, -1));
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API lua_State *luaL_newstate (void) {
|
||||
lua_State *L = lua_newstate(l_alloc, NULL);
|
||||
if (L) lua_atpanic(L, &panic);
|
||||
return L;
|
||||
}
|
||||
|
|
@ -1,174 +0,0 @@
|
|||
/*
|
||||
** $Id: lauxlib.h,v 1.88.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Auxiliary functions for building Lua libraries
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#ifndef lauxlib_h
|
||||
#define lauxlib_h
|
||||
|
||||
|
||||
#include <stddef.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
|
||||
#if defined(LUA_COMPAT_GETN)
|
||||
LUALIB_API int (luaL_getn) (lua_State *L, int t);
|
||||
LUALIB_API void (luaL_setn) (lua_State *L, int t, int n);
|
||||
#else
|
||||
#define luaL_getn(L,i) ((int)lua_objlen(L, i))
|
||||
#define luaL_setn(L,i,j) ((void)0) /* no op! */
|
||||
#endif
|
||||
|
||||
#if defined(LUA_COMPAT_OPENLIB)
|
||||
#define luaI_openlib luaL_openlib
|
||||
#endif
|
||||
|
||||
|
||||
/* extra error code for `luaL_load' */
|
||||
#define LUA_ERRFILE (LUA_ERRERR+1)
|
||||
|
||||
|
||||
typedef struct luaL_Reg {
|
||||
const char *name;
|
||||
lua_CFunction func;
|
||||
} luaL_Reg;
|
||||
|
||||
|
||||
|
||||
LUALIB_API void (luaI_openlib) (lua_State *L, const char *libname,
|
||||
const luaL_Reg *l, int nup);
|
||||
LUALIB_API void (luaL_register) (lua_State *L, const char *libname,
|
||||
const luaL_Reg *l);
|
||||
LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
|
||||
LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
|
||||
LUALIB_API int (luaL_typerror) (lua_State *L, int narg, const char *tname);
|
||||
LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg);
|
||||
LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg,
|
||||
size_t *l);
|
||||
LUALIB_API const char *(luaL_optlstring) (lua_State *L, int numArg,
|
||||
const char *def, size_t *l);
|
||||
LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int numArg);
|
||||
LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def);
|
||||
|
||||
LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg);
|
||||
LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg,
|
||||
lua_Integer def);
|
||||
|
||||
LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
|
||||
LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t);
|
||||
LUALIB_API void (luaL_checkany) (lua_State *L, int narg);
|
||||
|
||||
LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname);
|
||||
LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
|
||||
|
||||
LUALIB_API void (luaL_where) (lua_State *L, int lvl);
|
||||
LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
|
||||
|
||||
LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def,
|
||||
const char *const lst[]);
|
||||
|
||||
LUALIB_API int (luaL_ref) (lua_State *L, int t);
|
||||
LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref);
|
||||
|
||||
LUALIB_API int (luaL_loadfile) (lua_State *L, const char *filename);
|
||||
LUALIB_API int (luaL_loadbuffer) (lua_State *L, const char *buff, size_t sz,
|
||||
const char *name);
|
||||
LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
|
||||
|
||||
LUALIB_API lua_State *(luaL_newstate) (void);
|
||||
|
||||
|
||||
LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
|
||||
const char *r);
|
||||
|
||||
LUALIB_API const char *(luaL_findtable) (lua_State *L, int idx,
|
||||
const char *fname, int szhint);
|
||||
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** ===============================================================
|
||||
** some useful macros
|
||||
** ===============================================================
|
||||
*/
|
||||
|
||||
#define luaL_argcheck(L, cond,numarg,extramsg) \
|
||||
((void)((cond) || luaL_argerror(L, (numarg), (extramsg))))
|
||||
#define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL))
|
||||
#define luaL_optstring(L,n,d) (luaL_optlstring(L, (n), (d), NULL))
|
||||
#define luaL_checkint(L,n) ((int)luaL_checkinteger(L, (n)))
|
||||
#define luaL_optint(L,n,d) ((int)luaL_optinteger(L, (n), (d)))
|
||||
#define luaL_checklong(L,n) ((long)luaL_checkinteger(L, (n)))
|
||||
#define luaL_optlong(L,n,d) ((long)luaL_optinteger(L, (n), (d)))
|
||||
|
||||
#define luaL_typename(L,i) lua_typename(L, lua_type(L,(i)))
|
||||
|
||||
#define luaL_dofile(L, fn) \
|
||||
(luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0))
|
||||
|
||||
#define luaL_dostring(L, s) \
|
||||
(luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0))
|
||||
|
||||
#define luaL_getmetatable(L,n) (lua_getfield(L, LUA_REGISTRYINDEX, (n)))
|
||||
|
||||
#define luaL_opt(L,f,n,d) (lua_isnoneornil(L,(n)) ? (d) : f(L,(n)))
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** Generic Buffer manipulation
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
|
||||
|
||||
typedef struct luaL_Buffer {
|
||||
char *p; /* current position in buffer */
|
||||
int lvl; /* number of strings in the stack (level) */
|
||||
lua_State *L;
|
||||
char buffer[LUAL_BUFFERSIZE];
|
||||
} luaL_Buffer;
|
||||
|
||||
#define luaL_addchar(B,c) \
|
||||
((void)((B)->p < ((B)->buffer+LUAL_BUFFERSIZE) || luaL_prepbuffer(B)), \
|
||||
(*(B)->p++ = (char)(c)))
|
||||
|
||||
/* compatibility only */
|
||||
#define luaL_putchar(B,c) luaL_addchar(B,c)
|
||||
|
||||
#define luaL_addsize(B,n) ((B)->p += (n))
|
||||
|
||||
LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B);
|
||||
LUALIB_API char *(luaL_prepbuffer) (luaL_Buffer *B);
|
||||
LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l);
|
||||
LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s);
|
||||
LUALIB_API void (luaL_addvalue) (luaL_Buffer *B);
|
||||
LUALIB_API void (luaL_pushresult) (luaL_Buffer *B);
|
||||
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
/* compatibility with ref system */
|
||||
|
||||
/* pre-defined references */
|
||||
#define LUA_NOREF (-2)
|
||||
#define LUA_REFNIL (-1)
|
||||
|
||||
#define lua_ref(L,lock) ((lock) ? luaL_ref(L, LUA_REGISTRYINDEX) : \
|
||||
(lua_pushstring(L, "unlocked references are obsolete"), lua_error(L), 0))
|
||||
|
||||
#define lua_unref(L,ref) luaL_unref(L, LUA_REGISTRYINDEX, (ref))
|
||||
|
||||
#define lua_getref(L,ref) lua_rawgeti(L, LUA_REGISTRYINDEX, (ref))
|
||||
|
||||
|
||||
#define luaL_reg luaL_Reg
|
||||
|
||||
#endif
|
||||
|
||||
|
|
@ -1,653 +0,0 @@
|
|||
/*
|
||||
** $Id: lbaselib.c,v 1.191.1.6 2008/02/14 16:46:22 roberto Exp $
|
||||
** Basic library
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
|
||||
#include <ctype.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#define lbaselib_c
|
||||
#define LUA_LIB
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lauxlib.h"
|
||||
#include "lualib.h"
|
||||
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** If your system does not support `stdout', you can just remove this function.
|
||||
** If you need, you can define your own `print' function, following this
|
||||
** model but changing `fputs' to put the strings at a proper place
|
||||
** (a console window or a log file, for instance).
|
||||
*/
|
||||
static int luaB_print (lua_State *L) {
|
||||
int n = lua_gettop(L); /* number of arguments */
|
||||
int i;
|
||||
lua_getglobal(L, "tostring");
|
||||
for (i=1; i<=n; i++) {
|
||||
const char *s;
|
||||
lua_pushvalue(L, -1); /* function to be called */
|
||||
lua_pushvalue(L, i); /* value to print */
|
||||
lua_call(L, 1, 1);
|
||||
s = lua_tostring(L, -1); /* get result */
|
||||
if (s == NULL)
|
||||
return luaL_error(L, LUA_QL("tostring") " must return a string to "
|
||||
LUA_QL("print"));
|
||||
if (i>1) fputs("\t", stdout);
|
||||
fputs(s, stdout);
|
||||
lua_pop(L, 1); /* pop result */
|
||||
}
|
||||
fputs("\n", stdout);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_tonumber (lua_State *L) {
|
||||
int base = luaL_optint(L, 2, 10);
|
||||
if (base == 10) { /* standard conversion */
|
||||
luaL_checkany(L, 1);
|
||||
if (lua_isnumber(L, 1)) {
|
||||
lua_pushnumber(L, lua_tonumber(L, 1));
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
else {
|
||||
const char *s1 = luaL_checkstring(L, 1);
|
||||
char *s2;
|
||||
unsigned long n;
|
||||
luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
|
||||
n = strtoul(s1, &s2, base);
|
||||
if (s1 != s2) { /* at least one valid digit? */
|
||||
while (isspace((unsigned char)(*s2))) s2++; /* skip trailing spaces */
|
||||
if (*s2 == '\0') { /* no invalid trailing characters? */
|
||||
lua_pushnumber(L, (lua_Number)n);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
lua_pushnil(L); /* else not a number */
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_error (lua_State *L) {
|
||||
int level = luaL_optint(L, 2, 1);
|
||||
lua_settop(L, 1);
|
||||
if (lua_isstring(L, 1) && level > 0) { /* add extra information? */
|
||||
luaL_where(L, level);
|
||||
lua_pushvalue(L, 1);
|
||||
lua_concat(L, 2);
|
||||
}
|
||||
return lua_error(L);
|
||||
}
|
||||
|
||||
|
||||
static int luaB_getmetatable (lua_State *L) {
|
||||
luaL_checkany(L, 1);
|
||||
if (!lua_getmetatable(L, 1)) {
|
||||
lua_pushnil(L);
|
||||
return 1; /* no metatable */
|
||||
}
|
||||
luaL_getmetafield(L, 1, "__metatable");
|
||||
return 1; /* returns either __metatable field (if present) or metatable */
|
||||
}
|
||||
|
||||
|
||||
static int luaB_setmetatable (lua_State *L) {
|
||||
int t = lua_type(L, 2);
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
|
||||
"nil or table expected");
|
||||
if (luaL_getmetafield(L, 1, "__metatable"))
|
||||
luaL_error(L, "cannot change a protected metatable");
|
||||
lua_settop(L, 2);
|
||||
lua_setmetatable(L, 1);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static void getfunc (lua_State *L, int opt) {
|
||||
if (lua_isfunction(L, 1)) lua_pushvalue(L, 1);
|
||||
else {
|
||||
lua_Debug ar;
|
||||
int level = opt ? luaL_optint(L, 1, 1) : luaL_checkint(L, 1);
|
||||
luaL_argcheck(L, level >= 0, 1, "level must be non-negative");
|
||||
if (lua_getstack(L, level, &ar) == 0)
|
||||
luaL_argerror(L, 1, "invalid level");
|
||||
lua_getinfo(L, "f", &ar);
|
||||
if (lua_isnil(L, -1))
|
||||
luaL_error(L, "no function environment for tail call at level %d",
|
||||
level);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int luaB_getfenv (lua_State *L) {
|
||||
getfunc(L, 1);
|
||||
if (lua_iscfunction(L, -1)) /* is a C function? */
|
||||
lua_pushvalue(L, LUA_GLOBALSINDEX); /* return the thread's global env. */
|
||||
else
|
||||
lua_getfenv(L, -1);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_setfenv (lua_State *L) {
|
||||
luaL_checktype(L, 2, LUA_TTABLE);
|
||||
getfunc(L, 0);
|
||||
lua_pushvalue(L, 2);
|
||||
if (lua_isnumber(L, 1) && lua_tonumber(L, 1) == 0) {
|
||||
/* change environment of current thread */
|
||||
lua_pushthread(L);
|
||||
lua_insert(L, -2);
|
||||
lua_setfenv(L, -2);
|
||||
return 0;
|
||||
}
|
||||
else if (lua_iscfunction(L, -2) || lua_setfenv(L, -2) == 0)
|
||||
luaL_error(L,
|
||||
LUA_QL("setfenv") " cannot change environment of given object");
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_rawequal (lua_State *L) {
|
||||
luaL_checkany(L, 1);
|
||||
luaL_checkany(L, 2);
|
||||
lua_pushboolean(L, lua_rawequal(L, 1, 2));
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_rawget (lua_State *L) {
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
luaL_checkany(L, 2);
|
||||
lua_settop(L, 2);
|
||||
lua_rawget(L, 1);
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int luaB_rawset (lua_State *L) {
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
luaL_checkany(L, 2);
|
||||
luaL_checkany(L, 3);
|
||||
lua_settop(L, 3);
|
||||
lua_rawset(L, 1);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_gcinfo (lua_State *L) {
|
||||
lua_pushinteger(L, lua_getgccount(L));
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_collectgarbage (lua_State *L) {
|
||||
static const char *const opts[] = {"stop", "restart", "collect",
|
||||
"count", "step", "setpause", "setstepmul", NULL};
|
||||
static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
|
||||
LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL};
|
||||
int o = luaL_checkoption(L, 1, "collect", opts);
|
||||
int ex = luaL_optint(L, 2, 0);
|
||||
int res = lua_gc(L, optsnum[o], ex);
|
||||
switch (optsnum[o]) {
|
||||
case LUA_GCCOUNT: {
|
||||
int b = lua_gc(L, LUA_GCCOUNTB, 0);
|
||||
lua_pushnumber(L, res + ((lua_Number)b/1024));
|
||||
return 1;
|
||||
}
|
||||
case LUA_GCSTEP: {
|
||||
lua_pushboolean(L, res);
|
||||
return 1;
|
||||
}
|
||||
default: {
|
||||
lua_pushnumber(L, res);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int luaB_type (lua_State *L) {
|
||||
luaL_checkany(L, 1);
|
||||
lua_pushstring(L, luaL_typename(L, 1));
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_next (lua_State *L) {
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
lua_settop(L, 2); /* create a 2nd argument if there isn't one */
|
||||
if (lua_next(L, 1))
|
||||
return 2;
|
||||
else {
|
||||
lua_pushnil(L);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int luaB_pairs (lua_State *L) {
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
lua_pushvalue(L, lua_upvalueindex(1)); /* return generator, */
|
||||
lua_pushvalue(L, 1); /* state, */
|
||||
lua_pushnil(L); /* and initial value */
|
||||
return 3;
|
||||
}
|
||||
|
||||
|
||||
static int ipairsaux (lua_State *L) {
|
||||
int i = luaL_checkint(L, 2);
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
i++; /* next value */
|
||||
lua_pushinteger(L, i);
|
||||
lua_rawgeti(L, 1, i);
|
||||
return (lua_isnil(L, -1)) ? 0 : 2;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_ipairs (lua_State *L) {
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
lua_pushvalue(L, lua_upvalueindex(1)); /* return generator, */
|
||||
lua_pushvalue(L, 1); /* state, */
|
||||
lua_pushinteger(L, 0); /* and initial value */
|
||||
return 3;
|
||||
}
|
||||
|
||||
|
||||
static int load_aux (lua_State *L, int status) {
|
||||
if (status == 0) /* OK? */
|
||||
return 1;
|
||||
else {
|
||||
lua_pushnil(L);
|
||||
lua_insert(L, -2); /* put before error message */
|
||||
return 2; /* return nil plus error message */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int luaB_loadstring (lua_State *L) {
|
||||
size_t l;
|
||||
const char *s = luaL_checklstring(L, 1, &l);
|
||||
const char *chunkname = luaL_optstring(L, 2, s);
|
||||
return load_aux(L, luaL_loadbuffer(L, s, l, chunkname));
|
||||
}
|
||||
|
||||
|
||||
static int luaB_loadfile (lua_State *L) {
|
||||
const char *fname = luaL_optstring(L, 1, NULL);
|
||||
return load_aux(L, luaL_loadfile(L, fname));
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Reader for generic `load' function: `lua_load' uses the
|
||||
** stack for internal stuff, so the reader cannot change the
|
||||
** stack top. Instead, it keeps its resulting string in a
|
||||
** reserved slot inside the stack.
|
||||
*/
|
||||
static const char *generic_reader (lua_State *L, void *ud, size_t *size) {
|
||||
(void)ud; /* to avoid warnings */
|
||||
luaL_checkstack(L, 2, "too many nested functions");
|
||||
lua_pushvalue(L, 1); /* get function */
|
||||
lua_call(L, 0, 1); /* call it */
|
||||
if (lua_isnil(L, -1)) {
|
||||
*size = 0;
|
||||
return NULL;
|
||||
}
|
||||
else if (lua_isstring(L, -1)) {
|
||||
lua_replace(L, 3); /* save string in a reserved stack slot */
|
||||
return lua_tolstring(L, 3, size);
|
||||
}
|
||||
else luaL_error(L, "reader function must return a string");
|
||||
return NULL; /* to avoid warnings */
|
||||
}
|
||||
|
||||
|
||||
static int luaB_load (lua_State *L) {
|
||||
int status;
|
||||
const char *cname = luaL_optstring(L, 2, "=(load)");
|
||||
luaL_checktype(L, 1, LUA_TFUNCTION);
|
||||
lua_settop(L, 3); /* function, eventual name, plus one reserved slot */
|
||||
status = lua_load(L, generic_reader, NULL, cname);
|
||||
return load_aux(L, status);
|
||||
}
|
||||
|
||||
|
||||
static int luaB_dofile (lua_State *L) {
|
||||
const char *fname = luaL_optstring(L, 1, NULL);
|
||||
int n = lua_gettop(L);
|
||||
if (luaL_loadfile(L, fname) != 0) lua_error(L);
|
||||
lua_call(L, 0, LUA_MULTRET);
|
||||
return lua_gettop(L) - n;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_assert (lua_State *L) {
|
||||
luaL_checkany(L, 1);
|
||||
if (!lua_toboolean(L, 1))
|
||||
return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!"));
|
||||
return lua_gettop(L);
|
||||
}
|
||||
|
||||
|
||||
static int luaB_unpack (lua_State *L) {
|
||||
int i, e, n;
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
i = luaL_optint(L, 2, 1);
|
||||
e = luaL_opt(L, luaL_checkint, 3, luaL_getn(L, 1));
|
||||
if (i > e) return 0; /* empty range */
|
||||
n = e - i + 1; /* number of elements */
|
||||
if (n <= 0 || !lua_checkstack(L, n)) /* n <= 0 means arith. overflow */
|
||||
return luaL_error(L, "too many results to unpack");
|
||||
lua_rawgeti(L, 1, i); /* push arg[i] (avoiding overflow problems) */
|
||||
while (i++ < e) /* push arg[i + 1...e] */
|
||||
lua_rawgeti(L, 1, i);
|
||||
return n;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_select (lua_State *L) {
|
||||
int n = lua_gettop(L);
|
||||
if (lua_type(L, 1) == LUA_TSTRING && *lua_tostring(L, 1) == '#') {
|
||||
lua_pushinteger(L, n-1);
|
||||
return 1;
|
||||
}
|
||||
else {
|
||||
int i = luaL_checkint(L, 1);
|
||||
if (i < 0) i = n + i;
|
||||
else if (i > n) i = n;
|
||||
luaL_argcheck(L, 1 <= i, 1, "index out of range");
|
||||
return n - i;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int luaB_pcall (lua_State *L) {
|
||||
int status;
|
||||
luaL_checkany(L, 1);
|
||||
status = lua_pcall(L, lua_gettop(L) - 1, LUA_MULTRET, 0);
|
||||
lua_pushboolean(L, (status == 0));
|
||||
lua_insert(L, 1);
|
||||
return lua_gettop(L); /* return status + all results */
|
||||
}
|
||||
|
||||
|
||||
static int luaB_xpcall (lua_State *L) {
|
||||
int status;
|
||||
luaL_checkany(L, 2);
|
||||
lua_settop(L, 2);
|
||||
lua_insert(L, 1); /* put error function under function to be called */
|
||||
status = lua_pcall(L, 0, LUA_MULTRET, 1);
|
||||
lua_pushboolean(L, (status == 0));
|
||||
lua_replace(L, 1);
|
||||
return lua_gettop(L); /* return status + all results */
|
||||
}
|
||||
|
||||
|
||||
static int luaB_tostring (lua_State *L) {
|
||||
luaL_checkany(L, 1);
|
||||
if (luaL_callmeta(L, 1, "__tostring")) /* is there a metafield? */
|
||||
return 1; /* use its value */
|
||||
switch (lua_type(L, 1)) {
|
||||
case LUA_TNUMBER:
|
||||
lua_pushstring(L, lua_tostring(L, 1));
|
||||
break;
|
||||
case LUA_TSTRING:
|
||||
lua_pushvalue(L, 1);
|
||||
break;
|
||||
case LUA_TBOOLEAN:
|
||||
lua_pushstring(L, (lua_toboolean(L, 1) ? "true" : "false"));
|
||||
break;
|
||||
case LUA_TNIL:
|
||||
lua_pushliteral(L, "nil");
|
||||
break;
|
||||
default:
|
||||
lua_pushfstring(L, "%s: %p", luaL_typename(L, 1), lua_topointer(L, 1));
|
||||
break;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_newproxy (lua_State *L) {
|
||||
lua_settop(L, 1);
|
||||
lua_newuserdata(L, 0); /* create proxy */
|
||||
if (lua_toboolean(L, 1) == 0)
|
||||
return 1; /* no metatable */
|
||||
else if (lua_isboolean(L, 1)) {
|
||||
lua_newtable(L); /* create a new metatable `m' ... */
|
||||
lua_pushvalue(L, -1); /* ... and mark `m' as a valid metatable */
|
||||
lua_pushboolean(L, 1);
|
||||
lua_rawset(L, lua_upvalueindex(1)); /* weaktable[m] = true */
|
||||
}
|
||||
else {
|
||||
int validproxy = 0; /* to check if weaktable[metatable(u)] == true */
|
||||
if (lua_getmetatable(L, 1)) {
|
||||
lua_rawget(L, lua_upvalueindex(1));
|
||||
validproxy = lua_toboolean(L, -1);
|
||||
lua_pop(L, 1); /* remove value */
|
||||
}
|
||||
luaL_argcheck(L, validproxy, 1, "boolean or proxy expected");
|
||||
lua_getmetatable(L, 1); /* metatable is valid; get it */
|
||||
}
|
||||
lua_setmetatable(L, 2);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static const luaL_Reg base_funcs[] = {
|
||||
{"assert", luaB_assert},
|
||||
{"collectgarbage", luaB_collectgarbage},
|
||||
{"dofile", luaB_dofile},
|
||||
{"error", luaB_error},
|
||||
{"gcinfo", luaB_gcinfo},
|
||||
{"getfenv", luaB_getfenv},
|
||||
{"getmetatable", luaB_getmetatable},
|
||||
{"loadfile", luaB_loadfile},
|
||||
{"load", luaB_load},
|
||||
{"loadstring", luaB_loadstring},
|
||||
{"next", luaB_next},
|
||||
{"pcall", luaB_pcall},
|
||||
{"print", luaB_print},
|
||||
{"rawequal", luaB_rawequal},
|
||||
{"rawget", luaB_rawget},
|
||||
{"rawset", luaB_rawset},
|
||||
{"select", luaB_select},
|
||||
{"setfenv", luaB_setfenv},
|
||||
{"setmetatable", luaB_setmetatable},
|
||||
{"tonumber", luaB_tonumber},
|
||||
{"tostring", luaB_tostring},
|
||||
{"type", luaB_type},
|
||||
{"unpack", luaB_unpack},
|
||||
{"xpcall", luaB_xpcall},
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** Coroutine library
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
#define CO_RUN 0 /* running */
|
||||
#define CO_SUS 1 /* suspended */
|
||||
#define CO_NOR 2 /* 'normal' (it resumed another coroutine) */
|
||||
#define CO_DEAD 3
|
||||
|
||||
static const char *const statnames[] =
|
||||
{"running", "suspended", "normal", "dead"};
|
||||
|
||||
static int costatus (lua_State *L, lua_State *co) {
|
||||
if (L == co) return CO_RUN;
|
||||
switch (lua_status(co)) {
|
||||
case LUA_YIELD:
|
||||
return CO_SUS;
|
||||
case 0: {
|
||||
lua_Debug ar;
|
||||
if (lua_getstack(co, 0, &ar) > 0) /* does it have frames? */
|
||||
return CO_NOR; /* it is running */
|
||||
else if (lua_gettop(co) == 0)
|
||||
return CO_DEAD;
|
||||
else
|
||||
return CO_SUS; /* initial state */
|
||||
}
|
||||
default: /* some error occured */
|
||||
return CO_DEAD;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int luaB_costatus (lua_State *L) {
|
||||
lua_State *co = lua_tothread(L, 1);
|
||||
luaL_argcheck(L, co, 1, "coroutine expected");
|
||||
lua_pushstring(L, statnames[costatus(L, co)]);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int auxresume (lua_State *L, lua_State *co, int narg) {
|
||||
int status = costatus(L, co);
|
||||
if (!lua_checkstack(co, narg))
|
||||
luaL_error(L, "too many arguments to resume");
|
||||
if (status != CO_SUS) {
|
||||
lua_pushfstring(L, "cannot resume %s coroutine", statnames[status]);
|
||||
return -1; /* error flag */
|
||||
}
|
||||
lua_xmove(L, co, narg);
|
||||
lua_setlevel(L, co);
|
||||
status = lua_resume(co, narg);
|
||||
if (status == 0 || status == LUA_YIELD) {
|
||||
int nres = lua_gettop(co);
|
||||
if (!lua_checkstack(L, nres + 1))
|
||||
luaL_error(L, "too many results to resume");
|
||||
lua_xmove(co, L, nres); /* move yielded values */
|
||||
return nres;
|
||||
}
|
||||
else {
|
||||
lua_xmove(co, L, 1); /* move error message */
|
||||
return -1; /* error flag */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int luaB_coresume (lua_State *L) {
|
||||
lua_State *co = lua_tothread(L, 1);
|
||||
int r;
|
||||
luaL_argcheck(L, co, 1, "coroutine expected");
|
||||
r = auxresume(L, co, lua_gettop(L) - 1);
|
||||
if (r < 0) {
|
||||
lua_pushboolean(L, 0);
|
||||
lua_insert(L, -2);
|
||||
return 2; /* return false + error message */
|
||||
}
|
||||
else {
|
||||
lua_pushboolean(L, 1);
|
||||
lua_insert(L, -(r + 1));
|
||||
return r + 1; /* return true + `resume' returns */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int luaB_auxwrap (lua_State *L) {
|
||||
lua_State *co = lua_tothread(L, lua_upvalueindex(1));
|
||||
int r = auxresume(L, co, lua_gettop(L));
|
||||
if (r < 0) {
|
||||
if (lua_isstring(L, -1)) { /* error object is a string? */
|
||||
luaL_where(L, 1); /* add extra info */
|
||||
lua_insert(L, -2);
|
||||
lua_concat(L, 2);
|
||||
}
|
||||
lua_error(L); /* propagate error */
|
||||
}
|
||||
return r;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_cocreate (lua_State *L) {
|
||||
lua_State *NL = lua_newthread(L);
|
||||
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1,
|
||||
"Lua function expected");
|
||||
lua_pushvalue(L, 1); /* move function to top */
|
||||
lua_xmove(L, NL, 1); /* move function from L to NL */
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_cowrap (lua_State *L) {
|
||||
luaB_cocreate(L);
|
||||
lua_pushcclosure(L, luaB_auxwrap, 1);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int luaB_yield (lua_State *L) {
|
||||
return lua_yield(L, lua_gettop(L));
|
||||
}
|
||||
|
||||
|
||||
static int luaB_corunning (lua_State *L) {
|
||||
if (lua_pushthread(L))
|
||||
lua_pushnil(L); /* main thread is not a coroutine */
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static const luaL_Reg co_funcs[] = {
|
||||
{"create", luaB_cocreate},
|
||||
{"resume", luaB_coresume},
|
||||
{"running", luaB_corunning},
|
||||
{"status", luaB_costatus},
|
||||
{"wrap", luaB_cowrap},
|
||||
{"yield", luaB_yield},
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
static void auxopen (lua_State *L, const char *name,
|
||||
lua_CFunction f, lua_CFunction u) {
|
||||
lua_pushcfunction(L, u);
|
||||
lua_pushcclosure(L, f, 1);
|
||||
lua_setfield(L, -2, name);
|
||||
}
|
||||
|
||||
|
||||
static void base_open (lua_State *L) {
|
||||
/* set global _G */
|
||||
lua_pushvalue(L, LUA_GLOBALSINDEX);
|
||||
lua_setglobal(L, "_G");
|
||||
/* open lib into global table */
|
||||
luaL_register(L, "_G", base_funcs);
|
||||
lua_pushliteral(L, LUA_VERSION);
|
||||
lua_setglobal(L, "_VERSION"); /* set global _VERSION */
|
||||
/* `ipairs' and `pairs' need auxiliary functions as upvalues */
|
||||
auxopen(L, "ipairs", luaB_ipairs, ipairsaux);
|
||||
auxopen(L, "pairs", luaB_pairs, luaB_next);
|
||||
/* `newproxy' needs a weaktable as upvalue */
|
||||
lua_createtable(L, 0, 1); /* new table `w' */
|
||||
lua_pushvalue(L, -1); /* `w' will be its own metatable */
|
||||
lua_setmetatable(L, -2);
|
||||
lua_pushliteral(L, "kv");
|
||||
lua_setfield(L, -2, "__mode"); /* metatable(w).__mode = "kv" */
|
||||
lua_pushcclosure(L, luaB_newproxy, 1);
|
||||
lua_setglobal(L, "newproxy"); /* set global `newproxy' */
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API int luaopen_base (lua_State *L) {
|
||||
base_open(L);
|
||||
luaL_register(L, LUA_COLIBNAME, co_funcs);
|
||||
return 2;
|
||||
}
|
||||
|
831
src/lua/lcode.c
831
src/lua/lcode.c
|
@ -1,831 +0,0 @@
|
|||
/*
|
||||
** $Id: lcode.c,v 2.25.1.5 2011/01/31 14:53:16 roberto Exp $
|
||||
** Code generator for Lua
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <stdlib.h>
|
||||
|
||||
#define lcode_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lcode.h"
|
||||
#include "ldebug.h"
|
||||
#include "ldo.h"
|
||||
#include "lgc.h"
|
||||
#include "llex.h"
|
||||
#include "lmem.h"
|
||||
#include "lobject.h"
|
||||
#include "lopcodes.h"
|
||||
#include "lparser.h"
|
||||
#include "ltable.h"
|
||||
|
||||
|
||||
#define hasjumps(e) ((e)->t != (e)->f)
|
||||
|
||||
|
||||
static int isnumeral(expdesc *e) {
|
||||
return (e->k == VKNUM && e->t == NO_JUMP && e->f == NO_JUMP);
|
||||
}
|
||||
|
||||
|
||||
void luaK_nil (FuncState *fs, int from, int n) {
|
||||
Instruction *previous;
|
||||
if (fs->pc > fs->lasttarget) { /* no jumps to current position? */
|
||||
if (fs->pc == 0) { /* function start? */
|
||||
if (from >= fs->nactvar)
|
||||
return; /* positions are already clean */
|
||||
}
|
||||
else {
|
||||
previous = &fs->f->code[fs->pc-1];
|
||||
if (GET_OPCODE(*previous) == OP_LOADNIL) {
|
||||
int pfrom = GETARG_A(*previous);
|
||||
int pto = GETARG_B(*previous);
|
||||
if (pfrom <= from && from <= pto+1) { /* can connect both? */
|
||||
if (from+n-1 > pto)
|
||||
SETARG_B(*previous, from+n-1);
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
luaK_codeABC(fs, OP_LOADNIL, from, from+n-1, 0); /* else no optimization */
|
||||
}
|
||||
|
||||
|
||||
int luaK_jump (FuncState *fs) {
|
||||
int jpc = fs->jpc; /* save list of jumps to here */
|
||||
int j;
|
||||
fs->jpc = NO_JUMP;
|
||||
j = luaK_codeAsBx(fs, OP_JMP, 0, NO_JUMP);
|
||||
luaK_concat(fs, &j, jpc); /* keep them on hold */
|
||||
return j;
|
||||
}
|
||||
|
||||
|
||||
void luaK_ret (FuncState *fs, int first, int nret) {
|
||||
luaK_codeABC(fs, OP_RETURN, first, nret+1, 0);
|
||||
}
|
||||
|
||||
|
||||
static int condjump (FuncState *fs, OpCode op, int A, int B, int C) {
|
||||
luaK_codeABC(fs, op, A, B, C);
|
||||
return luaK_jump(fs);
|
||||
}
|
||||
|
||||
|
||||
static void fixjump (FuncState *fs, int pc, int dest) {
|
||||
Instruction *jmp = &fs->f->code[pc];
|
||||
int offset = dest-(pc+1);
|
||||
lua_assert(dest != NO_JUMP);
|
||||
if (abs(offset) > MAXARG_sBx)
|
||||
luaX_syntaxerror(fs->ls, "control structure too long");
|
||||
SETARG_sBx(*jmp, offset);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** returns current `pc' and marks it as a jump target (to avoid wrong
|
||||
** optimizations with consecutive instructions not in the same basic block).
|
||||
*/
|
||||
int luaK_getlabel (FuncState *fs) {
|
||||
fs->lasttarget = fs->pc;
|
||||
return fs->pc;
|
||||
}
|
||||
|
||||
|
||||
static int getjump (FuncState *fs, int pc) {
|
||||
int offset = GETARG_sBx(fs->f->code[pc]);
|
||||
if (offset == NO_JUMP) /* point to itself represents end of list */
|
||||
return NO_JUMP; /* end of list */
|
||||
else
|
||||
return (pc+1)+offset; /* turn offset into absolute position */
|
||||
}
|
||||
|
||||
|
||||
static Instruction *getjumpcontrol (FuncState *fs, int pc) {
|
||||
Instruction *pi = &fs->f->code[pc];
|
||||
if (pc >= 1 && testTMode(GET_OPCODE(*(pi-1))))
|
||||
return pi-1;
|
||||
else
|
||||
return pi;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** check whether list has any jump that do not produce a value
|
||||
** (or produce an inverted value)
|
||||
*/
|
||||
static int need_value (FuncState *fs, int list) {
|
||||
for (; list != NO_JUMP; list = getjump(fs, list)) {
|
||||
Instruction i = *getjumpcontrol(fs, list);
|
||||
if (GET_OPCODE(i) != OP_TESTSET) return 1;
|
||||
}
|
||||
return 0; /* not found */
|
||||
}
|
||||
|
||||
|
||||
static int patchtestreg (FuncState *fs, int node, int reg) {
|
||||
Instruction *i = getjumpcontrol(fs, node);
|
||||
if (GET_OPCODE(*i) != OP_TESTSET)
|
||||
return 0; /* cannot patch other instructions */
|
||||
if (reg != NO_REG && reg != GETARG_B(*i))
|
||||
SETARG_A(*i, reg);
|
||||
else /* no register to put value or register already has the value */
|
||||
*i = CREATE_ABC(OP_TEST, GETARG_B(*i), 0, GETARG_C(*i));
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static void removevalues (FuncState *fs, int list) {
|
||||
for (; list != NO_JUMP; list = getjump(fs, list))
|
||||
patchtestreg(fs, list, NO_REG);
|
||||
}
|
||||
|
||||
|
||||
static void patchlistaux (FuncState *fs, int list, int vtarget, int reg,
|
||||
int dtarget) {
|
||||
while (list != NO_JUMP) {
|
||||
int next = getjump(fs, list);
|
||||
if (patchtestreg(fs, list, reg))
|
||||
fixjump(fs, list, vtarget);
|
||||
else
|
||||
fixjump(fs, list, dtarget); /* jump to default target */
|
||||
list = next;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void dischargejpc (FuncState *fs) {
|
||||
patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc);
|
||||
fs->jpc = NO_JUMP;
|
||||
}
|
||||
|
||||
|
||||
void luaK_patchlist (FuncState *fs, int list, int target) {
|
||||
if (target == fs->pc)
|
||||
luaK_patchtohere(fs, list);
|
||||
else {
|
||||
lua_assert(target < fs->pc);
|
||||
patchlistaux(fs, list, target, NO_REG, target);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaK_patchtohere (FuncState *fs, int list) {
|
||||
luaK_getlabel(fs);
|
||||
luaK_concat(fs, &fs->jpc, list);
|
||||
}
|
||||
|
||||
|
||||
void luaK_concat (FuncState *fs, int *l1, int l2) {
|
||||
if (l2 == NO_JUMP) return;
|
||||
else if (*l1 == NO_JUMP)
|
||||
*l1 = l2;
|
||||
else {
|
||||
int list = *l1;
|
||||
int next;
|
||||
while ((next = getjump(fs, list)) != NO_JUMP) /* find last element */
|
||||
list = next;
|
||||
fixjump(fs, list, l2);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaK_checkstack (FuncState *fs, int n) {
|
||||
int newstack = fs->freereg + n;
|
||||
if (newstack > fs->f->maxstacksize) {
|
||||
if (newstack >= MAXSTACK)
|
||||
luaX_syntaxerror(fs->ls, "function or expression too complex");
|
||||
fs->f->maxstacksize = cast_byte(newstack);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaK_reserveregs (FuncState *fs, int n) {
|
||||
luaK_checkstack(fs, n);
|
||||
fs->freereg += n;
|
||||
}
|
||||
|
||||
|
||||
static void freereg (FuncState *fs, int reg) {
|
||||
if (!ISK(reg) && reg >= fs->nactvar) {
|
||||
fs->freereg--;
|
||||
lua_assert(reg == fs->freereg);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void freeexp (FuncState *fs, expdesc *e) {
|
||||
if (e->k == VNONRELOC)
|
||||
freereg(fs, e->u.s.info);
|
||||
}
|
||||
|
||||
|
||||
static int addk (FuncState *fs, TValue *k, TValue *v) {
|
||||
lua_State *L = fs->L;
|
||||
TValue *idx = luaH_set(L, fs->h, k);
|
||||
Proto *f = fs->f;
|
||||
int oldsize = f->sizek;
|
||||
if (ttisnumber(idx)) {
|
||||
lua_assert(luaO_rawequalObj(&fs->f->k[cast_int(nvalue(idx))], v));
|
||||
return cast_int(nvalue(idx));
|
||||
}
|
||||
else { /* constant not found; create a new entry */
|
||||
setnvalue(idx, cast_num(fs->nk));
|
||||
luaM_growvector(L, f->k, fs->nk, f->sizek, TValue,
|
||||
MAXARG_Bx, "constant table overflow");
|
||||
while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]);
|
||||
setobj(L, &f->k[fs->nk], v);
|
||||
luaC_barrier(L, f, v);
|
||||
return fs->nk++;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
int luaK_stringK (FuncState *fs, TString *s) {
|
||||
TValue o;
|
||||
setsvalue(fs->L, &o, s);
|
||||
return addk(fs, &o, &o);
|
||||
}
|
||||
|
||||
|
||||
int luaK_numberK (FuncState *fs, lua_Number r) {
|
||||
TValue o;
|
||||
setnvalue(&o, r);
|
||||
return addk(fs, &o, &o);
|
||||
}
|
||||
|
||||
|
||||
static int boolK (FuncState *fs, int b) {
|
||||
TValue o;
|
||||
setbvalue(&o, b);
|
||||
return addk(fs, &o, &o);
|
||||
}
|
||||
|
||||
|
||||
static int nilK (FuncState *fs) {
|
||||
TValue k, v;
|
||||
setnilvalue(&v);
|
||||
/* cannot use nil as key; instead use table itself to represent nil */
|
||||
sethvalue(fs->L, &k, fs->h);
|
||||
return addk(fs, &k, &v);
|
||||
}
|
||||
|
||||
|
||||
void luaK_setreturns (FuncState *fs, expdesc *e, int nresults) {
|
||||
if (e->k == VCALL) { /* expression is an open function call? */
|
||||
SETARG_C(getcode(fs, e), nresults+1);
|
||||
}
|
||||
else if (e->k == VVARARG) {
|
||||
SETARG_B(getcode(fs, e), nresults+1);
|
||||
SETARG_A(getcode(fs, e), fs->freereg);
|
||||
luaK_reserveregs(fs, 1);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaK_setoneret (FuncState *fs, expdesc *e) {
|
||||
if (e->k == VCALL) { /* expression is an open function call? */
|
||||
e->k = VNONRELOC;
|
||||
e->u.s.info = GETARG_A(getcode(fs, e));
|
||||
}
|
||||
else if (e->k == VVARARG) {
|
||||
SETARG_B(getcode(fs, e), 2);
|
||||
e->k = VRELOCABLE; /* can relocate its simple result */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaK_dischargevars (FuncState *fs, expdesc *e) {
|
||||
switch (e->k) {
|
||||
case VLOCAL: {
|
||||
e->k = VNONRELOC;
|
||||
break;
|
||||
}
|
||||
case VUPVAL: {
|
||||
e->u.s.info = luaK_codeABC(fs, OP_GETUPVAL, 0, e->u.s.info, 0);
|
||||
e->k = VRELOCABLE;
|
||||
break;
|
||||
}
|
||||
case VGLOBAL: {
|
||||
e->u.s.info = luaK_codeABx(fs, OP_GETGLOBAL, 0, e->u.s.info);
|
||||
e->k = VRELOCABLE;
|
||||
break;
|
||||
}
|
||||
case VINDEXED: {
|
||||
freereg(fs, e->u.s.aux);
|
||||
freereg(fs, e->u.s.info);
|
||||
e->u.s.info = luaK_codeABC(fs, OP_GETTABLE, 0, e->u.s.info, e->u.s.aux);
|
||||
e->k = VRELOCABLE;
|
||||
break;
|
||||
}
|
||||
case VVARARG:
|
||||
case VCALL: {
|
||||
luaK_setoneret(fs, e);
|
||||
break;
|
||||
}
|
||||
default: break; /* there is one value available (somewhere) */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int code_label (FuncState *fs, int A, int b, int jump) {
|
||||
luaK_getlabel(fs); /* those instructions may be jump targets */
|
||||
return luaK_codeABC(fs, OP_LOADBOOL, A, b, jump);
|
||||
}
|
||||
|
||||
|
||||
static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
|
||||
luaK_dischargevars(fs, e);
|
||||
switch (e->k) {
|
||||
case VNIL: {
|
||||
luaK_nil(fs, reg, 1);
|
||||
break;
|
||||
}
|
||||
case VFALSE: case VTRUE: {
|
||||
luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0);
|
||||
break;
|
||||
}
|
||||
case VK: {
|
||||
luaK_codeABx(fs, OP_LOADK, reg, e->u.s.info);
|
||||
break;
|
||||
}
|
||||
case VKNUM: {
|
||||
luaK_codeABx(fs, OP_LOADK, reg, luaK_numberK(fs, e->u.nval));
|
||||
break;
|
||||
}
|
||||
case VRELOCABLE: {
|
||||
Instruction *pc = &getcode(fs, e);
|
||||
SETARG_A(*pc, reg);
|
||||
break;
|
||||
}
|
||||
case VNONRELOC: {
|
||||
if (reg != e->u.s.info)
|
||||
luaK_codeABC(fs, OP_MOVE, reg, e->u.s.info, 0);
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
lua_assert(e->k == VVOID || e->k == VJMP);
|
||||
return; /* nothing to do... */
|
||||
}
|
||||
}
|
||||
e->u.s.info = reg;
|
||||
e->k = VNONRELOC;
|
||||
}
|
||||
|
||||
|
||||
static void discharge2anyreg (FuncState *fs, expdesc *e) {
|
||||
if (e->k != VNONRELOC) {
|
||||
luaK_reserveregs(fs, 1);
|
||||
discharge2reg(fs, e, fs->freereg-1);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void exp2reg (FuncState *fs, expdesc *e, int reg) {
|
||||
discharge2reg(fs, e, reg);
|
||||
if (e->k == VJMP)
|
||||
luaK_concat(fs, &e->t, e->u.s.info); /* put this jump in `t' list */
|
||||
if (hasjumps(e)) {
|
||||
int final; /* position after whole expression */
|
||||
int p_f = NO_JUMP; /* position of an eventual LOAD false */
|
||||
int p_t = NO_JUMP; /* position of an eventual LOAD true */
|
||||
if (need_value(fs, e->t) || need_value(fs, e->f)) {
|
||||
int fj = (e->k == VJMP) ? NO_JUMP : luaK_jump(fs);
|
||||
p_f = code_label(fs, reg, 0, 1);
|
||||
p_t = code_label(fs, reg, 1, 0);
|
||||
luaK_patchtohere(fs, fj);
|
||||
}
|
||||
final = luaK_getlabel(fs);
|
||||
patchlistaux(fs, e->f, final, reg, p_f);
|
||||
patchlistaux(fs, e->t, final, reg, p_t);
|
||||
}
|
||||
e->f = e->t = NO_JUMP;
|
||||
e->u.s.info = reg;
|
||||
e->k = VNONRELOC;
|
||||
}
|
||||
|
||||
|
||||
void luaK_exp2nextreg (FuncState *fs, expdesc *e) {
|
||||
luaK_dischargevars(fs, e);
|
||||
freeexp(fs, e);
|
||||
luaK_reserveregs(fs, 1);
|
||||
exp2reg(fs, e, fs->freereg - 1);
|
||||
}
|
||||
|
||||
|
||||
int luaK_exp2anyreg (FuncState *fs, expdesc *e) {
|
||||
luaK_dischargevars(fs, e);
|
||||
if (e->k == VNONRELOC) {
|
||||
if (!hasjumps(e)) return e->u.s.info; /* exp is already in a register */
|
||||
if (e->u.s.info >= fs->nactvar) { /* reg. is not a local? */
|
||||
exp2reg(fs, e, e->u.s.info); /* put value on it */
|
||||
return e->u.s.info;
|
||||
}
|
||||
}
|
||||
luaK_exp2nextreg(fs, e); /* default */
|
||||
return e->u.s.info;
|
||||
}
|
||||
|
||||
|
||||
void luaK_exp2val (FuncState *fs, expdesc *e) {
|
||||
if (hasjumps(e))
|
||||
luaK_exp2anyreg(fs, e);
|
||||
else
|
||||
luaK_dischargevars(fs, e);
|
||||
}
|
||||
|
||||
|
||||
int luaK_exp2RK (FuncState *fs, expdesc *e) {
|
||||
luaK_exp2val(fs, e);
|
||||
switch (e->k) {
|
||||
case VKNUM:
|
||||
case VTRUE:
|
||||
case VFALSE:
|
||||
case VNIL: {
|
||||
if (fs->nk <= MAXINDEXRK) { /* constant fit in RK operand? */
|
||||
e->u.s.info = (e->k == VNIL) ? nilK(fs) :
|
||||
(e->k == VKNUM) ? luaK_numberK(fs, e->u.nval) :
|
||||
boolK(fs, (e->k == VTRUE));
|
||||
e->k = VK;
|
||||
return RKASK(e->u.s.info);
|
||||
}
|
||||
else break;
|
||||
}
|
||||
case VK: {
|
||||
if (e->u.s.info <= MAXINDEXRK) /* constant fit in argC? */
|
||||
return RKASK(e->u.s.info);
|
||||
else break;
|
||||
}
|
||||
default: break;
|
||||
}
|
||||
/* not a constant in the right range: put it in a register */
|
||||
return luaK_exp2anyreg(fs, e);
|
||||
}
|
||||
|
||||
|
||||
void luaK_storevar (FuncState *fs, expdesc *var, expdesc *ex) {
|
||||
switch (var->k) {
|
||||
case VLOCAL: {
|
||||
freeexp(fs, ex);
|
||||
exp2reg(fs, ex, var->u.s.info);
|
||||
return;
|
||||
}
|
||||
case VUPVAL: {
|
||||
int e = luaK_exp2anyreg(fs, ex);
|
||||
luaK_codeABC(fs, OP_SETUPVAL, e, var->u.s.info, 0);
|
||||
break;
|
||||
}
|
||||
case VGLOBAL: {
|
||||
int e = luaK_exp2anyreg(fs, ex);
|
||||
luaK_codeABx(fs, OP_SETGLOBAL, e, var->u.s.info);
|
||||
break;
|
||||
}
|
||||
case VINDEXED: {
|
||||
int e = luaK_exp2RK(fs, ex);
|
||||
luaK_codeABC(fs, OP_SETTABLE, var->u.s.info, var->u.s.aux, e);
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
lua_assert(0); /* invalid var kind to store */
|
||||
break;
|
||||
}
|
||||
}
|
||||
freeexp(fs, ex);
|
||||
}
|
||||
|
||||
|
||||
void luaK_self (FuncState *fs, expdesc *e, expdesc *key) {
|
||||
int func;
|
||||
luaK_exp2anyreg(fs, e);
|
||||
freeexp(fs, e);
|
||||
func = fs->freereg;
|
||||
luaK_reserveregs(fs, 2);
|
||||
luaK_codeABC(fs, OP_SELF, func, e->u.s.info, luaK_exp2RK(fs, key));
|
||||
freeexp(fs, key);
|
||||
e->u.s.info = func;
|
||||
e->k = VNONRELOC;
|
||||
}
|
||||
|
||||
|
||||
static void invertjump (FuncState *fs, expdesc *e) {
|
||||
Instruction *pc = getjumpcontrol(fs, e->u.s.info);
|
||||
lua_assert(testTMode(GET_OPCODE(*pc)) && GET_OPCODE(*pc) != OP_TESTSET &&
|
||||
GET_OPCODE(*pc) != OP_TEST);
|
||||
SETARG_A(*pc, !(GETARG_A(*pc)));
|
||||
}
|
||||
|
||||
|
||||
static int jumponcond (FuncState *fs, expdesc *e, int cond) {
|
||||
if (e->k == VRELOCABLE) {
|
||||
Instruction ie = getcode(fs, e);
|
||||
if (GET_OPCODE(ie) == OP_NOT) {
|
||||
fs->pc--; /* remove previous OP_NOT */
|
||||
return condjump(fs, OP_TEST, GETARG_B(ie), 0, !cond);
|
||||
}
|
||||
/* else go through */
|
||||
}
|
||||
discharge2anyreg(fs, e);
|
||||
freeexp(fs, e);
|
||||
return condjump(fs, OP_TESTSET, NO_REG, e->u.s.info, cond);
|
||||
}
|
||||
|
||||
|
||||
void luaK_goiftrue (FuncState *fs, expdesc *e) {
|
||||
int pc; /* pc of last jump */
|
||||
luaK_dischargevars(fs, e);
|
||||
switch (e->k) {
|
||||
case VK: case VKNUM: case VTRUE: {
|
||||
pc = NO_JUMP; /* always true; do nothing */
|
||||
break;
|
||||
}
|
||||
case VJMP: {
|
||||
invertjump(fs, e);
|
||||
pc = e->u.s.info;
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
pc = jumponcond(fs, e, 0);
|
||||
break;
|
||||
}
|
||||
}
|
||||
luaK_concat(fs, &e->f, pc); /* insert last jump in `f' list */
|
||||
luaK_patchtohere(fs, e->t);
|
||||
e->t = NO_JUMP;
|
||||
}
|
||||
|
||||
|
||||
static void luaK_goiffalse (FuncState *fs, expdesc *e) {
|
||||
int pc; /* pc of last jump */
|
||||
luaK_dischargevars(fs, e);
|
||||
switch (e->k) {
|
||||
case VNIL: case VFALSE: {
|
||||
pc = NO_JUMP; /* always false; do nothing */
|
||||
break;
|
||||
}
|
||||
case VJMP: {
|
||||
pc = e->u.s.info;
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
pc = jumponcond(fs, e, 1);
|
||||
break;
|
||||
}
|
||||
}
|
||||
luaK_concat(fs, &e->t, pc); /* insert last jump in `t' list */
|
||||
luaK_patchtohere(fs, e->f);
|
||||
e->f = NO_JUMP;
|
||||
}
|
||||
|
||||
|
||||
static void codenot (FuncState *fs, expdesc *e) {
|
||||
luaK_dischargevars(fs, e);
|
||||
switch (e->k) {
|
||||
case VNIL: case VFALSE: {
|
||||
e->k = VTRUE;
|
||||
break;
|
||||
}
|
||||
case VK: case VKNUM: case VTRUE: {
|
||||
e->k = VFALSE;
|
||||
break;
|
||||
}
|
||||
case VJMP: {
|
||||
invertjump(fs, e);
|
||||
break;
|
||||
}
|
||||
case VRELOCABLE:
|
||||
case VNONRELOC: {
|
||||
discharge2anyreg(fs, e);
|
||||
freeexp(fs, e);
|
||||
e->u.s.info = luaK_codeABC(fs, OP_NOT, 0, e->u.s.info, 0);
|
||||
e->k = VRELOCABLE;
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
lua_assert(0); /* cannot happen */
|
||||
break;
|
||||
}
|
||||
}
|
||||
/* interchange true and false lists */
|
||||
{ int temp = e->f; e->f = e->t; e->t = temp; }
|
||||
removevalues(fs, e->f);
|
||||
removevalues(fs, e->t);
|
||||
}
|
||||
|
||||
|
||||
void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) {
|
||||
t->u.s.aux = luaK_exp2RK(fs, k);
|
||||
t->k = VINDEXED;
|
||||
}
|
||||
|
||||
|
||||
static int constfolding (OpCode op, expdesc *e1, expdesc *e2) {
|
||||
lua_Number v1, v2, r;
|
||||
if (!isnumeral(e1) || !isnumeral(e2)) return 0;
|
||||
v1 = e1->u.nval;
|
||||
v2 = e2->u.nval;
|
||||
switch (op) {
|
||||
case OP_ADD: r = luai_numadd(v1, v2); break;
|
||||
case OP_SUB: r = luai_numsub(v1, v2); break;
|
||||
case OP_MUL: r = luai_nummul(v1, v2); break;
|
||||
case OP_DIV:
|
||||
if (v2 == 0) return 0; /* do not attempt to divide by 0 */
|
||||
r = luai_numdiv(v1, v2); break;
|
||||
case OP_MOD:
|
||||
if (v2 == 0) return 0; /* do not attempt to divide by 0 */
|
||||
r = luai_nummod(v1, v2); break;
|
||||
case OP_POW: r = luai_numpow(v1, v2); break;
|
||||
case OP_UNM: r = luai_numunm(v1); break;
|
||||
case OP_LEN: return 0; /* no constant folding for 'len' */
|
||||
default: lua_assert(0); r = 0; break;
|
||||
}
|
||||
if (luai_numisnan(r)) return 0; /* do not attempt to produce NaN */
|
||||
e1->u.nval = r;
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static void codearith (FuncState *fs, OpCode op, expdesc *e1, expdesc *e2) {
|
||||
if (constfolding(op, e1, e2))
|
||||
return;
|
||||
else {
|
||||
int o2 = (op != OP_UNM && op != OP_LEN) ? luaK_exp2RK(fs, e2) : 0;
|
||||
int o1 = luaK_exp2RK(fs, e1);
|
||||
if (o1 > o2) {
|
||||
freeexp(fs, e1);
|
||||
freeexp(fs, e2);
|
||||
}
|
||||
else {
|
||||
freeexp(fs, e2);
|
||||
freeexp(fs, e1);
|
||||
}
|
||||
e1->u.s.info = luaK_codeABC(fs, op, 0, o1, o2);
|
||||
e1->k = VRELOCABLE;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void codecomp (FuncState *fs, OpCode op, int cond, expdesc *e1,
|
||||
expdesc *e2) {
|
||||
int o1 = luaK_exp2RK(fs, e1);
|
||||
int o2 = luaK_exp2RK(fs, e2);
|
||||
freeexp(fs, e2);
|
||||
freeexp(fs, e1);
|
||||
if (cond == 0 && op != OP_EQ) {
|
||||
int temp; /* exchange args to replace by `<' or `<=' */
|
||||
temp = o1; o1 = o2; o2 = temp; /* o1 <==> o2 */
|
||||
cond = 1;
|
||||
}
|
||||
e1->u.s.info = condjump(fs, op, cond, o1, o2);
|
||||
e1->k = VJMP;
|
||||
}
|
||||
|
||||
|
||||
void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) {
|
||||
expdesc e2;
|
||||
e2.t = e2.f = NO_JUMP; e2.k = VKNUM; e2.u.nval = 0;
|
||||
switch (op) {
|
||||
case OPR_MINUS: {
|
||||
if (!isnumeral(e))
|
||||
luaK_exp2anyreg(fs, e); /* cannot operate on non-numeric constants */
|
||||
codearith(fs, OP_UNM, e, &e2);
|
||||
break;
|
||||
}
|
||||
case OPR_NOT: codenot(fs, e); break;
|
||||
case OPR_LEN: {
|
||||
luaK_exp2anyreg(fs, e); /* cannot operate on constants */
|
||||
codearith(fs, OP_LEN, e, &e2);
|
||||
break;
|
||||
}
|
||||
default: lua_assert(0);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {
|
||||
switch (op) {
|
||||
case OPR_AND: {
|
||||
luaK_goiftrue(fs, v);
|
||||
break;
|
||||
}
|
||||
case OPR_OR: {
|
||||
luaK_goiffalse(fs, v);
|
||||
break;
|
||||
}
|
||||
case OPR_CONCAT: {
|
||||
luaK_exp2nextreg(fs, v); /* operand must be on the `stack' */
|
||||
break;
|
||||
}
|
||||
case OPR_ADD: case OPR_SUB: case OPR_MUL: case OPR_DIV:
|
||||
case OPR_MOD: case OPR_POW: {
|
||||
if (!isnumeral(v)) luaK_exp2RK(fs, v);
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
luaK_exp2RK(fs, v);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaK_posfix (FuncState *fs, BinOpr op, expdesc *e1, expdesc *e2) {
|
||||
switch (op) {
|
||||
case OPR_AND: {
|
||||
lua_assert(e1->t == NO_JUMP); /* list must be closed */
|
||||
luaK_dischargevars(fs, e2);
|
||||
luaK_concat(fs, &e2->f, e1->f);
|
||||
*e1 = *e2;
|
||||
break;
|
||||
}
|
||||
case OPR_OR: {
|
||||
lua_assert(e1->f == NO_JUMP); /* list must be closed */
|
||||
luaK_dischargevars(fs, e2);
|
||||
luaK_concat(fs, &e2->t, e1->t);
|
||||
*e1 = *e2;
|
||||
break;
|
||||
}
|
||||
case OPR_CONCAT: {
|
||||
luaK_exp2val(fs, e2);
|
||||
if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) {
|
||||
lua_assert(e1->u.s.info == GETARG_B(getcode(fs, e2))-1);
|
||||
freeexp(fs, e1);
|
||||
SETARG_B(getcode(fs, e2), e1->u.s.info);
|
||||
e1->k = VRELOCABLE; e1->u.s.info = e2->u.s.info;
|
||||
}
|
||||
else {
|
||||
luaK_exp2nextreg(fs, e2); /* operand must be on the 'stack' */
|
||||
codearith(fs, OP_CONCAT, e1, e2);
|
||||
}
|
||||
break;
|
||||
}
|
||||
case OPR_ADD: codearith(fs, OP_ADD, e1, e2); break;
|
||||
case OPR_SUB: codearith(fs, OP_SUB, e1, e2); break;
|
||||
case OPR_MUL: codearith(fs, OP_MUL, e1, e2); break;
|
||||
case OPR_DIV: codearith(fs, OP_DIV, e1, e2); break;
|
||||
case OPR_MOD: codearith(fs, OP_MOD, e1, e2); break;
|
||||
case OPR_POW: codearith(fs, OP_POW, e1, e2); break;
|
||||
case OPR_EQ: codecomp(fs, OP_EQ, 1, e1, e2); break;
|
||||
case OPR_NE: codecomp(fs, OP_EQ, 0, e1, e2); break;
|
||||
case OPR_LT: codecomp(fs, OP_LT, 1, e1, e2); break;
|
||||
case OPR_LE: codecomp(fs, OP_LE, 1, e1, e2); break;
|
||||
case OPR_GT: codecomp(fs, OP_LT, 0, e1, e2); break;
|
||||
case OPR_GE: codecomp(fs, OP_LE, 0, e1, e2); break;
|
||||
default: lua_assert(0);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaK_fixline (FuncState *fs, int line) {
|
||||
fs->f->lineinfo[fs->pc - 1] = line;
|
||||
}
|
||||
|
||||
|
||||
static int luaK_code (FuncState *fs, Instruction i, int line) {
|
||||
Proto *f = fs->f;
|
||||
dischargejpc(fs); /* `pc' will change */
|
||||
/* put new instruction in code array */
|
||||
luaM_growvector(fs->L, f->code, fs->pc, f->sizecode, Instruction,
|
||||
MAX_INT, "code size overflow");
|
||||
f->code[fs->pc] = i;
|
||||
/* save corresponding line information */
|
||||
luaM_growvector(fs->L, f->lineinfo, fs->pc, f->sizelineinfo, int,
|
||||
MAX_INT, "code size overflow");
|
||||
f->lineinfo[fs->pc] = line;
|
||||
return fs->pc++;
|
||||
}
|
||||
|
||||
|
||||
int luaK_codeABC (FuncState *fs, OpCode o, int a, int b, int c) {
|
||||
lua_assert(getOpMode(o) == iABC);
|
||||
lua_assert(getBMode(o) != OpArgN || b == 0);
|
||||
lua_assert(getCMode(o) != OpArgN || c == 0);
|
||||
return luaK_code(fs, CREATE_ABC(o, a, b, c), fs->ls->lastline);
|
||||
}
|
||||
|
||||
|
||||
int luaK_codeABx (FuncState *fs, OpCode o, int a, unsigned int bc) {
|
||||
lua_assert(getOpMode(o) == iABx || getOpMode(o) == iAsBx);
|
||||
lua_assert(getCMode(o) == OpArgN);
|
||||
return luaK_code(fs, CREATE_ABx(o, a, bc), fs->ls->lastline);
|
||||
}
|
||||
|
||||
|
||||
void luaK_setlist (FuncState *fs, int base, int nelems, int tostore) {
|
||||
int c = (nelems - 1)/LFIELDS_PER_FLUSH + 1;
|
||||
int b = (tostore == LUA_MULTRET) ? 0 : tostore;
|
||||
lua_assert(tostore != 0);
|
||||
if (c <= MAXARG_C)
|
||||
luaK_codeABC(fs, OP_SETLIST, base, b, c);
|
||||
else {
|
||||
luaK_codeABC(fs, OP_SETLIST, base, b, 0);
|
||||
luaK_code(fs, cast(Instruction, c), fs->ls->lastline);
|
||||
}
|
||||
fs->freereg = base + 1; /* free registers with list values */
|
||||
}
|
||||
|
|
@ -1,76 +0,0 @@
|
|||
/*
|
||||
** $Id: lcode.h,v 1.48.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Code generator for Lua
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef lcode_h
|
||||
#define lcode_h
|
||||
|
||||
#include "llex.h"
|
||||
#include "lobject.h"
|
||||
#include "lopcodes.h"
|
||||
#include "lparser.h"
|
||||
|
||||
|
||||
/*
|
||||
** Marks the end of a patch list. It is an invalid value both as an absolute
|
||||
** address, and as a list link (would link an element to itself).
|
||||
*/
|
||||
#define NO_JUMP (-1)
|
||||
|
||||
|
||||
/*
|
||||
** grep "ORDER OPR" if you change these enums
|
||||
*/
|
||||
typedef enum BinOpr {
|
||||
OPR_ADD, OPR_SUB, OPR_MUL, OPR_DIV, OPR_MOD, OPR_POW,
|
||||
OPR_CONCAT,
|
||||
OPR_NE, OPR_EQ,
|
||||
OPR_LT, OPR_LE, OPR_GT, OPR_GE,
|
||||
OPR_AND, OPR_OR,
|
||||
OPR_NOBINOPR
|
||||
} BinOpr;
|
||||
|
||||
|
||||
typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
|
||||
|
||||
|
||||
#define getcode(fs,e) ((fs)->f->code[(e)->u.s.info])
|
||||
|
||||
#define luaK_codeAsBx(fs,o,A,sBx) luaK_codeABx(fs,o,A,(sBx)+MAXARG_sBx)
|
||||
|
||||
#define luaK_setmultret(fs,e) luaK_setreturns(fs, e, LUA_MULTRET)
|
||||
|
||||
LUAI_FUNC int luaK_codeABx (FuncState *fs, OpCode o, int A, unsigned int Bx);
|
||||
LUAI_FUNC int luaK_codeABC (FuncState *fs, OpCode o, int A, int B, int C);
|
||||
LUAI_FUNC void luaK_fixline (FuncState *fs, int line);
|
||||
LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n);
|
||||
LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n);
|
||||
LUAI_FUNC void luaK_checkstack (FuncState *fs, int n);
|
||||
LUAI_FUNC int luaK_stringK (FuncState *fs, TString *s);
|
||||
LUAI_FUNC int luaK_numberK (FuncState *fs, lua_Number r);
|
||||
LUAI_FUNC void luaK_dischargevars (FuncState *fs, expdesc *e);
|
||||
LUAI_FUNC int luaK_exp2anyreg (FuncState *fs, expdesc *e);
|
||||
LUAI_FUNC void luaK_exp2nextreg (FuncState *fs, expdesc *e);
|
||||
LUAI_FUNC void luaK_exp2val (FuncState *fs, expdesc *e);
|
||||
LUAI_FUNC int luaK_exp2RK (FuncState *fs, expdesc *e);
|
||||
LUAI_FUNC void luaK_self (FuncState *fs, expdesc *e, expdesc *key);
|
||||
LUAI_FUNC void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k);
|
||||
LUAI_FUNC void luaK_goiftrue (FuncState *fs, expdesc *e);
|
||||
LUAI_FUNC void luaK_storevar (FuncState *fs, expdesc *var, expdesc *e);
|
||||
LUAI_FUNC void luaK_setreturns (FuncState *fs, expdesc *e, int nresults);
|
||||
LUAI_FUNC void luaK_setoneret (FuncState *fs, expdesc *e);
|
||||
LUAI_FUNC int luaK_jump (FuncState *fs);
|
||||
LUAI_FUNC void luaK_ret (FuncState *fs, int first, int nret);
|
||||
LUAI_FUNC void luaK_patchlist (FuncState *fs, int list, int target);
|
||||
LUAI_FUNC void luaK_patchtohere (FuncState *fs, int list);
|
||||
LUAI_FUNC void luaK_concat (FuncState *fs, int *l1, int l2);
|
||||
LUAI_FUNC int luaK_getlabel (FuncState *fs);
|
||||
LUAI_FUNC void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v);
|
||||
LUAI_FUNC void luaK_infix (FuncState *fs, BinOpr op, expdesc *v);
|
||||
LUAI_FUNC void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1, expdesc *v2);
|
||||
LUAI_FUNC void luaK_setlist (FuncState *fs, int base, int nelems, int tostore);
|
||||
|
||||
|
||||
#endif
|
398
src/lua/ldblib.c
398
src/lua/ldblib.c
|
@ -1,398 +0,0 @@
|
|||
/*
|
||||
** $Id: ldblib.c,v 1.104.1.4 2009/08/04 18:50:18 roberto Exp $
|
||||
** Interface from Lua to its debug API
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#define ldblib_c
|
||||
#define LUA_LIB
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lauxlib.h"
|
||||
#include "lualib.h"
|
||||
|
||||
|
||||
|
||||
static int db_getregistry (lua_State *L) {
|
||||
lua_pushvalue(L, LUA_REGISTRYINDEX);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int db_getmetatable (lua_State *L) {
|
||||
luaL_checkany(L, 1);
|
||||
if (!lua_getmetatable(L, 1)) {
|
||||
lua_pushnil(L); /* no metatable */
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int db_setmetatable (lua_State *L) {
|
||||
int t = lua_type(L, 2);
|
||||
luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
|
||||
"nil or table expected");
|
||||
lua_settop(L, 2);
|
||||
lua_pushboolean(L, lua_setmetatable(L, 1));
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int db_getfenv (lua_State *L) {
|
||||
luaL_checkany(L, 1);
|
||||
lua_getfenv(L, 1);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int db_setfenv (lua_State *L) {
|
||||
luaL_checktype(L, 2, LUA_TTABLE);
|
||||
lua_settop(L, 2);
|
||||
if (lua_setfenv(L, 1) == 0)
|
||||
luaL_error(L, LUA_QL("setfenv")
|
||||
" cannot change environment of given object");
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static void settabss (lua_State *L, const char *i, const char *v) {
|
||||
lua_pushstring(L, v);
|
||||
lua_setfield(L, -2, i);
|
||||
}
|
||||
|
||||
|
||||
static void settabsi (lua_State *L, const char *i, int v) {
|
||||
lua_pushinteger(L, v);
|
||||
lua_setfield(L, -2, i);
|
||||
}
|
||||
|
||||
|
||||
static lua_State *getthread (lua_State *L, int *arg) {
|
||||
if (lua_isthread(L, 1)) {
|
||||
*arg = 1;
|
||||
return lua_tothread(L, 1);
|
||||
}
|
||||
else {
|
||||
*arg = 0;
|
||||
return L;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) {
|
||||
if (L == L1) {
|
||||
lua_pushvalue(L, -2);
|
||||
lua_remove(L, -3);
|
||||
}
|
||||
else
|
||||
lua_xmove(L1, L, 1);
|
||||
lua_setfield(L, -2, fname);
|
||||
}
|
||||
|
||||
|
||||
static int db_getinfo (lua_State *L) {
|
||||
lua_Debug ar;
|
||||
int arg;
|
||||
lua_State *L1 = getthread(L, &arg);
|
||||
const char *options = luaL_optstring(L, arg+2, "flnSu");
|
||||
if (lua_isnumber(L, arg+1)) {
|
||||
if (!lua_getstack(L1, (int)lua_tointeger(L, arg+1), &ar)) {
|
||||
lua_pushnil(L); /* level out of range */
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
else if (lua_isfunction(L, arg+1)) {
|
||||
lua_pushfstring(L, ">%s", options);
|
||||
options = lua_tostring(L, -1);
|
||||
lua_pushvalue(L, arg+1);
|
||||
lua_xmove(L, L1, 1);
|
||||
}
|
||||
else
|
||||
return luaL_argerror(L, arg+1, "function or level expected");
|
||||
if (!lua_getinfo(L1, options, &ar))
|
||||
return luaL_argerror(L, arg+2, "invalid option");
|
||||
lua_createtable(L, 0, 2);
|
||||
if (strchr(options, 'S')) {
|
||||
settabss(L, "source", ar.source);
|
||||
settabss(L, "short_src", ar.short_src);
|
||||
settabsi(L, "linedefined", ar.linedefined);
|
||||
settabsi(L, "lastlinedefined", ar.lastlinedefined);
|
||||
settabss(L, "what", ar.what);
|
||||
}
|
||||
if (strchr(options, 'l'))
|
||||
settabsi(L, "currentline", ar.currentline);
|
||||
if (strchr(options, 'u'))
|
||||
settabsi(L, "nups", ar.nups);
|
||||
if (strchr(options, 'n')) {
|
||||
settabss(L, "name", ar.name);
|
||||
settabss(L, "namewhat", ar.namewhat);
|
||||
}
|
||||
if (strchr(options, 'L'))
|
||||
treatstackoption(L, L1, "activelines");
|
||||
if (strchr(options, 'f'))
|
||||
treatstackoption(L, L1, "func");
|
||||
return 1; /* return table */
|
||||
}
|
||||
|
||||
|
||||
static int db_getlocal (lua_State *L) {
|
||||
int arg;
|
||||
lua_State *L1 = getthread(L, &arg);
|
||||
lua_Debug ar;
|
||||
const char *name;
|
||||
if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar)) /* out of range? */
|
||||
return luaL_argerror(L, arg+1, "level out of range");
|
||||
name = lua_getlocal(L1, &ar, luaL_checkint(L, arg+2));
|
||||
if (name) {
|
||||
lua_xmove(L1, L, 1);
|
||||
lua_pushstring(L, name);
|
||||
lua_pushvalue(L, -2);
|
||||
return 2;
|
||||
}
|
||||
else {
|
||||
lua_pushnil(L);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int db_setlocal (lua_State *L) {
|
||||
int arg;
|
||||
lua_State *L1 = getthread(L, &arg);
|
||||
lua_Debug ar;
|
||||
if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar)) /* out of range? */
|
||||
return luaL_argerror(L, arg+1, "level out of range");
|
||||
luaL_checkany(L, arg+3);
|
||||
lua_settop(L, arg+3);
|
||||
lua_xmove(L, L1, 1);
|
||||
lua_pushstring(L, lua_setlocal(L1, &ar, luaL_checkint(L, arg+2)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int auxupvalue (lua_State *L, int get) {
|
||||
const char *name;
|
||||
int n = luaL_checkint(L, 2);
|
||||
luaL_checktype(L, 1, LUA_TFUNCTION);
|
||||
if (lua_iscfunction(L, 1)) return 0; /* cannot touch C upvalues from Lua */
|
||||
name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n);
|
||||
if (name == NULL) return 0;
|
||||
lua_pushstring(L, name);
|
||||
lua_insert(L, -(get+1));
|
||||
return get + 1;
|
||||
}
|
||||
|
||||
|
||||
static int db_getupvalue (lua_State *L) {
|
||||
return auxupvalue(L, 1);
|
||||
}
|
||||
|
||||
|
||||
static int db_setupvalue (lua_State *L) {
|
||||
luaL_checkany(L, 3);
|
||||
return auxupvalue(L, 0);
|
||||
}
|
||||
|
||||
|
||||
|
||||
static const char KEY_HOOK = 'h';
|
||||
|
||||
|
||||
static void hookf (lua_State *L, lua_Debug *ar) {
|
||||
static const char *const hooknames[] =
|
||||
{"call", "return", "line", "count", "tail return"};
|
||||
lua_pushlightuserdata(L, (void *)&KEY_HOOK);
|
||||
lua_rawget(L, LUA_REGISTRYINDEX);
|
||||
lua_pushlightuserdata(L, L);
|
||||
lua_rawget(L, -2);
|
||||
if (lua_isfunction(L, -1)) {
|
||||
lua_pushstring(L, hooknames[(int)ar->event]);
|
||||
if (ar->currentline >= 0)
|
||||
lua_pushinteger(L, ar->currentline);
|
||||
else lua_pushnil(L);
|
||||
lua_assert(lua_getinfo(L, "lS", ar));
|
||||
lua_call(L, 2, 0);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int makemask (const char *smask, int count) {
|
||||
int mask = 0;
|
||||
if (strchr(smask, 'c')) mask |= LUA_MASKCALL;
|
||||
if (strchr(smask, 'r')) mask |= LUA_MASKRET;
|
||||
if (strchr(smask, 'l')) mask |= LUA_MASKLINE;
|
||||
if (count > 0) mask |= LUA_MASKCOUNT;
|
||||
return mask;
|
||||
}
|
||||
|
||||
|
||||
static char *unmakemask (int mask, char *smask) {
|
||||
int i = 0;
|
||||
if (mask & LUA_MASKCALL) smask[i++] = 'c';
|
||||
if (mask & LUA_MASKRET) smask[i++] = 'r';
|
||||
if (mask & LUA_MASKLINE) smask[i++] = 'l';
|
||||
smask[i] = '\0';
|
||||
return smask;
|
||||
}
|
||||
|
||||
|
||||
static void gethooktable (lua_State *L) {
|
||||
lua_pushlightuserdata(L, (void *)&KEY_HOOK);
|
||||
lua_rawget(L, LUA_REGISTRYINDEX);
|
||||
if (!lua_istable(L, -1)) {
|
||||
lua_pop(L, 1);
|
||||
lua_createtable(L, 0, 1);
|
||||
lua_pushlightuserdata(L, (void *)&KEY_HOOK);
|
||||
lua_pushvalue(L, -2);
|
||||
lua_rawset(L, LUA_REGISTRYINDEX);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int db_sethook (lua_State *L) {
|
||||
int arg, mask, count;
|
||||
lua_Hook func;
|
||||
lua_State *L1 = getthread(L, &arg);
|
||||
if (lua_isnoneornil(L, arg+1)) {
|
||||
lua_settop(L, arg+1);
|
||||
func = NULL; mask = 0; count = 0; /* turn off hooks */
|
||||
}
|
||||
else {
|
||||
const char *smask = luaL_checkstring(L, arg+2);
|
||||
luaL_checktype(L, arg+1, LUA_TFUNCTION);
|
||||
count = luaL_optint(L, arg+3, 0);
|
||||
func = hookf; mask = makemask(smask, count);
|
||||
}
|
||||
gethooktable(L);
|
||||
lua_pushlightuserdata(L, L1);
|
||||
lua_pushvalue(L, arg+1);
|
||||
lua_rawset(L, -3); /* set new hook */
|
||||
lua_pop(L, 1); /* remove hook table */
|
||||
lua_sethook(L1, func, mask, count); /* set hooks */
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int db_gethook (lua_State *L) {
|
||||
int arg;
|
||||
lua_State *L1 = getthread(L, &arg);
|
||||
char buff[5];
|
||||
int mask = lua_gethookmask(L1);
|
||||
lua_Hook hook = lua_gethook(L1);
|
||||
if (hook != NULL && hook != hookf) /* external hook? */
|
||||
lua_pushliteral(L, "external hook");
|
||||
else {
|
||||
gethooktable(L);
|
||||
lua_pushlightuserdata(L, L1);
|
||||
lua_rawget(L, -2); /* get hook */
|
||||
lua_remove(L, -2); /* remove hook table */
|
||||
}
|
||||
lua_pushstring(L, unmakemask(mask, buff));
|
||||
lua_pushinteger(L, lua_gethookcount(L1));
|
||||
return 3;
|
||||
}
|
||||
|
||||
|
||||
static int db_debug (lua_State *L) {
|
||||
for (;;) {
|
||||
char buffer[250];
|
||||
fputs("lua_debug> ", stderr);
|
||||
if (fgets(buffer, sizeof(buffer), stdin) == 0 ||
|
||||
strcmp(buffer, "cont\n") == 0)
|
||||
return 0;
|
||||
if (luaL_loadbuffer(L, buffer, strlen(buffer), "=(debug command)") ||
|
||||
lua_pcall(L, 0, 0, 0)) {
|
||||
fputs(lua_tostring(L, -1), stderr);
|
||||
fputs("\n", stderr);
|
||||
}
|
||||
lua_settop(L, 0); /* remove eventual returns */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#define LEVELS1 12 /* size of the first part of the stack */
|
||||
#define LEVELS2 10 /* size of the second part of the stack */
|
||||
|
||||
static int db_errorfb (lua_State *L) {
|
||||
int level;
|
||||
int firstpart = 1; /* still before eventual `...' */
|
||||
int arg;
|
||||
lua_State *L1 = getthread(L, &arg);
|
||||
lua_Debug ar;
|
||||
if (lua_isnumber(L, arg+2)) {
|
||||
level = (int)lua_tointeger(L, arg+2);
|
||||
lua_pop(L, 1);
|
||||
}
|
||||
else
|
||||
level = (L == L1) ? 1 : 0; /* level 0 may be this own function */
|
||||
if (lua_gettop(L) == arg)
|
||||
lua_pushliteral(L, "");
|
||||
else if (!lua_isstring(L, arg+1)) return 1; /* message is not a string */
|
||||
else lua_pushliteral(L, "\n");
|
||||
lua_pushliteral(L, "stack traceback:");
|
||||
while (lua_getstack(L1, level++, &ar)) {
|
||||
if (level > LEVELS1 && firstpart) {
|
||||
/* no more than `LEVELS2' more levels? */
|
||||
if (!lua_getstack(L1, level+LEVELS2, &ar))
|
||||
level--; /* keep going */
|
||||
else {
|
||||
lua_pushliteral(L, "\n\t..."); /* too many levels */
|
||||
while (lua_getstack(L1, level+LEVELS2, &ar)) /* find last levels */
|
||||
level++;
|
||||
}
|
||||
firstpart = 0;
|
||||
continue;
|
||||
}
|
||||
lua_pushliteral(L, "\n\t");
|
||||
lua_getinfo(L1, "Snl", &ar);
|
||||
lua_pushfstring(L, "%s:", ar.short_src);
|
||||
if (ar.currentline > 0)
|
||||
lua_pushfstring(L, "%d:", ar.currentline);
|
||||
if (*ar.namewhat != '\0') /* is there a name? */
|
||||
lua_pushfstring(L, " in function " LUA_QS, ar.name);
|
||||
else {
|
||||
if (*ar.what == 'm') /* main? */
|
||||
lua_pushfstring(L, " in main chunk");
|
||||
else if (*ar.what == 'C' || *ar.what == 't')
|
||||
lua_pushliteral(L, " ?"); /* C function or tail call */
|
||||
else
|
||||
lua_pushfstring(L, " in function <%s:%d>",
|
||||
ar.short_src, ar.linedefined);
|
||||
}
|
||||
lua_concat(L, lua_gettop(L) - arg);
|
||||
}
|
||||
lua_concat(L, lua_gettop(L) - arg);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static const luaL_Reg dblib[] = {
|
||||
{"debug", db_debug},
|
||||
{"getfenv", db_getfenv},
|
||||
{"gethook", db_gethook},
|
||||
{"getinfo", db_getinfo},
|
||||
{"getlocal", db_getlocal},
|
||||
{"getregistry", db_getregistry},
|
||||
{"getmetatable", db_getmetatable},
|
||||
{"getupvalue", db_getupvalue},
|
||||
{"setfenv", db_setfenv},
|
||||
{"sethook", db_sethook},
|
||||
{"setlocal", db_setlocal},
|
||||
{"setmetatable", db_setmetatable},
|
||||
{"setupvalue", db_setupvalue},
|
||||
{"traceback", db_errorfb},
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
|
||||
LUALIB_API int luaopen_debug (lua_State *L) {
|
||||
luaL_register(L, LUA_DBLIBNAME, dblib);
|
||||
return 1;
|
||||
}
|
||||
|
638
src/lua/ldebug.c
638
src/lua/ldebug.c
|
@ -1,638 +0,0 @@
|
|||
/*
|
||||
** $Id: ldebug.c,v 2.29.1.6 2008/05/08 16:56:26 roberto Exp $
|
||||
** Debug Interface
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <stdarg.h>
|
||||
#include <stddef.h>
|
||||
#include <string.h>
|
||||
|
||||
|
||||
#define ldebug_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lapi.h"
|
||||
#include "lcode.h"
|
||||
#include "ldebug.h"
|
||||
#include "ldo.h"
|
||||
#include "lfunc.h"
|
||||
#include "lobject.h"
|
||||
#include "lopcodes.h"
|
||||
#include "lstate.h"
|
||||
#include "lstring.h"
|
||||
#include "ltable.h"
|
||||
#include "ltm.h"
|
||||
#include "lvm.h"
|
||||
|
||||
|
||||
|
||||
static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name);
|
||||
|
||||
|
||||
static int currentpc (lua_State *L, CallInfo *ci) {
|
||||
if (!isLua(ci)) return -1; /* function is not a Lua function? */
|
||||
if (ci == L->ci)
|
||||
ci->savedpc = L->savedpc;
|
||||
return pcRel(ci->savedpc, ci_func(ci)->l.p);
|
||||
}
|
||||
|
||||
|
||||
static int currentline (lua_State *L, CallInfo *ci) {
|
||||
int pc = currentpc(L, ci);
|
||||
if (pc < 0)
|
||||
return -1; /* only active lua functions have current-line information */
|
||||
else
|
||||
return getline(ci_func(ci)->l.p, pc);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** this function can be called asynchronous (e.g. during a signal)
|
||||
*/
|
||||
LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
|
||||
if (func == NULL || mask == 0) { /* turn off hooks? */
|
||||
mask = 0;
|
||||
func = NULL;
|
||||
}
|
||||
L->hook = func;
|
||||
L->basehookcount = count;
|
||||
resethookcount(L);
|
||||
L->hookmask = cast_byte(mask);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
LUA_API lua_Hook lua_gethook (lua_State *L) {
|
||||
return L->hook;
|
||||
}
|
||||
|
||||
|
||||
LUA_API int lua_gethookmask (lua_State *L) {
|
||||
return L->hookmask;
|
||||
}
|
||||
|
||||
|
||||
LUA_API int lua_gethookcount (lua_State *L) {
|
||||
return L->basehookcount;
|
||||
}
|
||||
|
||||
|
||||
LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
|
||||
int status;
|
||||
CallInfo *ci;
|
||||
lua_lock(L);
|
||||
for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) {
|
||||
level--;
|
||||
if (f_isLua(ci)) /* Lua function? */
|
||||
level -= ci->tailcalls; /* skip lost tail calls */
|
||||
}
|
||||
if (level == 0 && ci > L->base_ci) { /* level found? */
|
||||
status = 1;
|
||||
ar->i_ci = cast_int(ci - L->base_ci);
|
||||
}
|
||||
else if (level < 0) { /* level is of a lost tail call? */
|
||||
status = 1;
|
||||
ar->i_ci = 0;
|
||||
}
|
||||
else status = 0; /* no such level */
|
||||
lua_unlock(L);
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
static Proto *getluaproto (CallInfo *ci) {
|
||||
return (isLua(ci) ? ci_func(ci)->l.p : NULL);
|
||||
}
|
||||
|
||||
|
||||
static const char *findlocal (lua_State *L, CallInfo *ci, int n) {
|
||||
const char *name;
|
||||
Proto *fp = getluaproto(ci);
|
||||
if (fp && (name = luaF_getlocalname(fp, n, currentpc(L, ci))) != NULL)
|
||||
return name; /* is a local variable in a Lua function */
|
||||
else {
|
||||
StkId limit = (ci == L->ci) ? L->top : (ci+1)->func;
|
||||
if (limit - ci->base >= n && n > 0) /* is 'n' inside 'ci' stack? */
|
||||
return "(*temporary)";
|
||||
else
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
|
||||
CallInfo *ci = L->base_ci + ar->i_ci;
|
||||
const char *name = findlocal(L, ci, n);
|
||||
lua_lock(L);
|
||||
if (name)
|
||||
luaA_pushobject(L, ci->base + (n - 1));
|
||||
lua_unlock(L);
|
||||
return name;
|
||||
}
|
||||
|
||||
|
||||
LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
|
||||
CallInfo *ci = L->base_ci + ar->i_ci;
|
||||
const char *name = findlocal(L, ci, n);
|
||||
lua_lock(L);
|
||||
if (name)
|
||||
setobjs2s(L, ci->base + (n - 1), L->top - 1);
|
||||
L->top--; /* pop value */
|
||||
lua_unlock(L);
|
||||
return name;
|
||||
}
|
||||
|
||||
|
||||
static void funcinfo (lua_Debug *ar, Closure *cl) {
|
||||
if (cl->c.isC) {
|
||||
ar->source = "=[C]";
|
||||
ar->linedefined = -1;
|
||||
ar->lastlinedefined = -1;
|
||||
ar->what = "C";
|
||||
}
|
||||
else {
|
||||
ar->source = getstr(cl->l.p->source);
|
||||
ar->linedefined = cl->l.p->linedefined;
|
||||
ar->lastlinedefined = cl->l.p->lastlinedefined;
|
||||
ar->what = (ar->linedefined == 0) ? "main" : "Lua";
|
||||
}
|
||||
luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
|
||||
}
|
||||
|
||||
|
||||
static void info_tailcall (lua_Debug *ar) {
|
||||
ar->name = ar->namewhat = "";
|
||||
ar->what = "tail";
|
||||
ar->lastlinedefined = ar->linedefined = ar->currentline = -1;
|
||||
ar->source = "=(tail call)";
|
||||
luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
|
||||
ar->nups = 0;
|
||||
}
|
||||
|
||||
|
||||
static void collectvalidlines (lua_State *L, Closure *f) {
|
||||
if (f == NULL || f->c.isC) {
|
||||
setnilvalue(L->top);
|
||||
}
|
||||
else {
|
||||
Table *t = luaH_new(L, 0, 0);
|
||||
int *lineinfo = f->l.p->lineinfo;
|
||||
int i;
|
||||
for (i=0; i<f->l.p->sizelineinfo; i++)
|
||||
setbvalue(luaH_setnum(L, t, lineinfo[i]), 1);
|
||||
sethvalue(L, L->top, t);
|
||||
}
|
||||
incr_top(L);
|
||||
}
|
||||
|
||||
|
||||
static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
|
||||
Closure *f, CallInfo *ci) {
|
||||
int status = 1;
|
||||
if (f == NULL) {
|
||||
info_tailcall(ar);
|
||||
return status;
|
||||
}
|
||||
for (; *what; what++) {
|
||||
switch (*what) {
|
||||
case 'S': {
|
||||
funcinfo(ar, f);
|
||||
break;
|
||||
}
|
||||
case 'l': {
|
||||
ar->currentline = (ci) ? currentline(L, ci) : -1;
|
||||
break;
|
||||
}
|
||||
case 'u': {
|
||||
ar->nups = f->c.nupvalues;
|
||||
break;
|
||||
}
|
||||
case 'n': {
|
||||
ar->namewhat = (ci) ? getfuncname(L, ci, &ar->name) : NULL;
|
||||
if (ar->namewhat == NULL) {
|
||||
ar->namewhat = ""; /* not found */
|
||||
ar->name = NULL;
|
||||
}
|
||||
break;
|
||||
}
|
||||
case 'L':
|
||||
case 'f': /* handled by lua_getinfo */
|
||||
break;
|
||||
default: status = 0; /* invalid option */
|
||||
}
|
||||
}
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
|
||||
int status;
|
||||
Closure *f = NULL;
|
||||
CallInfo *ci = NULL;
|
||||
lua_lock(L);
|
||||
if (*what == '>') {
|
||||
StkId func = L->top - 1;
|
||||
luai_apicheck(L, ttisfunction(func));
|
||||
what++; /* skip the '>' */
|
||||
f = clvalue(func);
|
||||
L->top--; /* pop function */
|
||||
}
|
||||
else if (ar->i_ci != 0) { /* no tail call? */
|
||||
ci = L->base_ci + ar->i_ci;
|
||||
lua_assert(ttisfunction(ci->func));
|
||||
f = clvalue(ci->func);
|
||||
}
|
||||
status = auxgetinfo(L, what, ar, f, ci);
|
||||
if (strchr(what, 'f')) {
|
||||
if (f == NULL) setnilvalue(L->top);
|
||||
else setclvalue(L, L->top, f);
|
||||
incr_top(L);
|
||||
}
|
||||
if (strchr(what, 'L'))
|
||||
collectvalidlines(L, f);
|
||||
lua_unlock(L);
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** Symbolic Execution and code checker
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
#define check(x) if (!(x)) return 0;
|
||||
|
||||
#define checkjump(pt,pc) check(0 <= pc && pc < pt->sizecode)
|
||||
|
||||
#define checkreg(pt,reg) check((reg) < (pt)->maxstacksize)
|
||||
|
||||
|
||||
|
||||
static int precheck (const Proto *pt) {
|
||||
check(pt->maxstacksize <= MAXSTACK);
|
||||
check(pt->numparams+(pt->is_vararg & VARARG_HASARG) <= pt->maxstacksize);
|
||||
check(!(pt->is_vararg & VARARG_NEEDSARG) ||
|
||||
(pt->is_vararg & VARARG_HASARG));
|
||||
check(pt->sizeupvalues <= pt->nups);
|
||||
check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0);
|
||||
check(pt->sizecode > 0 && GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
#define checkopenop(pt,pc) luaG_checkopenop((pt)->code[(pc)+1])
|
||||
|
||||
int luaG_checkopenop (Instruction i) {
|
||||
switch (GET_OPCODE(i)) {
|
||||
case OP_CALL:
|
||||
case OP_TAILCALL:
|
||||
case OP_RETURN:
|
||||
case OP_SETLIST: {
|
||||
check(GETARG_B(i) == 0);
|
||||
return 1;
|
||||
}
|
||||
default: return 0; /* invalid instruction after an open call */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int checkArgMode (const Proto *pt, int r, enum OpArgMask mode) {
|
||||
switch (mode) {
|
||||
case OpArgN: check(r == 0); break;
|
||||
case OpArgU: break;
|
||||
case OpArgR: checkreg(pt, r); break;
|
||||
case OpArgK:
|
||||
check(ISK(r) ? INDEXK(r) < pt->sizek : r < pt->maxstacksize);
|
||||
break;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static Instruction symbexec (const Proto *pt, int lastpc, int reg) {
|
||||
int pc;
|
||||
int last; /* stores position of last instruction that changed `reg' */
|
||||
last = pt->sizecode-1; /* points to final return (a `neutral' instruction) */
|
||||
check(precheck(pt));
|
||||
for (pc = 0; pc < lastpc; pc++) {
|
||||
Instruction i = pt->code[pc];
|
||||
OpCode op = GET_OPCODE(i);
|
||||
int a = GETARG_A(i);
|
||||
int b = 0;
|
||||
int c = 0;
|
||||
check(op < NUM_OPCODES);
|
||||
checkreg(pt, a);
|
||||
switch (getOpMode(op)) {
|
||||
case iABC: {
|
||||
b = GETARG_B(i);
|
||||
c = GETARG_C(i);
|
||||
check(checkArgMode(pt, b, getBMode(op)));
|
||||
check(checkArgMode(pt, c, getCMode(op)));
|
||||
break;
|
||||
}
|
||||
case iABx: {
|
||||
b = GETARG_Bx(i);
|
||||
if (getBMode(op) == OpArgK) check(b < pt->sizek);
|
||||
break;
|
||||
}
|
||||
case iAsBx: {
|
||||
b = GETARG_sBx(i);
|
||||
if (getBMode(op) == OpArgR) {
|
||||
int dest = pc+1+b;
|
||||
check(0 <= dest && dest < pt->sizecode);
|
||||
if (dest > 0) {
|
||||
int j;
|
||||
/* check that it does not jump to a setlist count; this
|
||||
is tricky, because the count from a previous setlist may
|
||||
have the same value of an invalid setlist; so, we must
|
||||
go all the way back to the first of them (if any) */
|
||||
for (j = 0; j < dest; j++) {
|
||||
Instruction d = pt->code[dest-1-j];
|
||||
if (!(GET_OPCODE(d) == OP_SETLIST && GETARG_C(d) == 0)) break;
|
||||
}
|
||||
/* if 'j' is even, previous value is not a setlist (even if
|
||||
it looks like one) */
|
||||
check((j&1) == 0);
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (testAMode(op)) {
|
||||
if (a == reg) last = pc; /* change register `a' */
|
||||
}
|
||||
if (testTMode(op)) {
|
||||
check(pc+2 < pt->sizecode); /* check skip */
|
||||
check(GET_OPCODE(pt->code[pc+1]) == OP_JMP);
|
||||
}
|
||||
switch (op) {
|
||||
case OP_LOADBOOL: {
|
||||
if (c == 1) { /* does it jump? */
|
||||
check(pc+2 < pt->sizecode); /* check its jump */
|
||||
check(GET_OPCODE(pt->code[pc+1]) != OP_SETLIST ||
|
||||
GETARG_C(pt->code[pc+1]) != 0);
|
||||
}
|
||||
break;
|
||||
}
|
||||
case OP_LOADNIL: {
|
||||
if (a <= reg && reg <= b)
|
||||
last = pc; /* set registers from `a' to `b' */
|
||||
break;
|
||||
}
|
||||
case OP_GETUPVAL:
|
||||
case OP_SETUPVAL: {
|
||||
check(b < pt->nups);
|
||||
break;
|
||||
}
|
||||
case OP_GETGLOBAL:
|
||||
case OP_SETGLOBAL: {
|
||||
check(ttisstring(&pt->k[b]));
|
||||
break;
|
||||
}
|
||||
case OP_SELF: {
|
||||
checkreg(pt, a+1);
|
||||
if (reg == a+1) last = pc;
|
||||
break;
|
||||
}
|
||||
case OP_CONCAT: {
|
||||
check(b < c); /* at least two operands */
|
||||
break;
|
||||
}
|
||||
case OP_TFORLOOP: {
|
||||
check(c >= 1); /* at least one result (control variable) */
|
||||
checkreg(pt, a+2+c); /* space for results */
|
||||
if (reg >= a+2) last = pc; /* affect all regs above its base */
|
||||
break;
|
||||
}
|
||||
case OP_FORLOOP:
|
||||
case OP_FORPREP:
|
||||
checkreg(pt, a+3);
|
||||
/* go through */
|
||||
case OP_JMP: {
|
||||
int dest = pc+1+b;
|
||||
/* not full check and jump is forward and do not skip `lastpc'? */
|
||||
if (reg != NO_REG && pc < dest && dest <= lastpc)
|
||||
pc += b; /* do the jump */
|
||||
break;
|
||||
}
|
||||
case OP_CALL:
|
||||
case OP_TAILCALL: {
|
||||
if (b != 0) {
|
||||
checkreg(pt, a+b-1);
|
||||
}
|
||||
c--; /* c = num. returns */
|
||||
if (c == LUA_MULTRET) {
|
||||
check(checkopenop(pt, pc));
|
||||
}
|
||||
else if (c != 0)
|
||||
checkreg(pt, a+c-1);
|
||||
if (reg >= a) last = pc; /* affect all registers above base */
|
||||
break;
|
||||
}
|
||||
case OP_RETURN: {
|
||||
b--; /* b = num. returns */
|
||||
if (b > 0) checkreg(pt, a+b-1);
|
||||
break;
|
||||
}
|
||||
case OP_SETLIST: {
|
||||
if (b > 0) checkreg(pt, a + b);
|
||||
if (c == 0) {
|
||||
pc++;
|
||||
check(pc < pt->sizecode - 1);
|
||||
}
|
||||
break;
|
||||
}
|
||||
case OP_CLOSURE: {
|
||||
int nup, j;
|
||||
check(b < pt->sizep);
|
||||
nup = pt->p[b]->nups;
|
||||
check(pc + nup < pt->sizecode);
|
||||
for (j = 1; j <= nup; j++) {
|
||||
OpCode op1 = GET_OPCODE(pt->code[pc + j]);
|
||||
check(op1 == OP_GETUPVAL || op1 == OP_MOVE);
|
||||
}
|
||||
if (reg != NO_REG) /* tracing? */
|
||||
pc += nup; /* do not 'execute' these pseudo-instructions */
|
||||
break;
|
||||
}
|
||||
case OP_VARARG: {
|
||||
check((pt->is_vararg & VARARG_ISVARARG) &&
|
||||
!(pt->is_vararg & VARARG_NEEDSARG));
|
||||
b--;
|
||||
if (b == LUA_MULTRET) check(checkopenop(pt, pc));
|
||||
checkreg(pt, a+b-1);
|
||||
break;
|
||||
}
|
||||
default: break;
|
||||
}
|
||||
}
|
||||
return pt->code[last];
|
||||
}
|
||||
|
||||
#undef check
|
||||
#undef checkjump
|
||||
#undef checkreg
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
int luaG_checkcode (const Proto *pt) {
|
||||
return (symbexec(pt, pt->sizecode, NO_REG) != 0);
|
||||
}
|
||||
|
||||
|
||||
static const char *kname (Proto *p, int c) {
|
||||
if (ISK(c) && ttisstring(&p->k[INDEXK(c)]))
|
||||
return svalue(&p->k[INDEXK(c)]);
|
||||
else
|
||||
return "?";
|
||||
}
|
||||
|
||||
|
||||
static const char *getobjname (lua_State *L, CallInfo *ci, int stackpos,
|
||||
const char **name) {
|
||||
if (isLua(ci)) { /* a Lua function? */
|
||||
Proto *p = ci_func(ci)->l.p;
|
||||
int pc = currentpc(L, ci);
|
||||
Instruction i;
|
||||
*name = luaF_getlocalname(p, stackpos+1, pc);
|
||||
if (*name) /* is a local? */
|
||||
return "local";
|
||||
i = symbexec(p, pc, stackpos); /* try symbolic execution */
|
||||
lua_assert(pc != -1);
|
||||
switch (GET_OPCODE(i)) {
|
||||
case OP_GETGLOBAL: {
|
||||
int g = GETARG_Bx(i); /* global index */
|
||||
lua_assert(ttisstring(&p->k[g]));
|
||||
*name = svalue(&p->k[g]);
|
||||
return "global";
|
||||
}
|
||||
case OP_MOVE: {
|
||||
int a = GETARG_A(i);
|
||||
int b = GETARG_B(i); /* move from `b' to `a' */
|
||||
if (b < a)
|
||||
return getobjname(L, ci, b, name); /* get name for `b' */
|
||||
break;
|
||||
}
|
||||
case OP_GETTABLE: {
|
||||
int k = GETARG_C(i); /* key index */
|
||||
*name = kname(p, k);
|
||||
return "field";
|
||||
}
|
||||
case OP_GETUPVAL: {
|
||||
int u = GETARG_B(i); /* upvalue index */
|
||||
*name = p->upvalues ? getstr(p->upvalues[u]) : "?";
|
||||
return "upvalue";
|
||||
}
|
||||
case OP_SELF: {
|
||||
int k = GETARG_C(i); /* key index */
|
||||
*name = kname(p, k);
|
||||
return "method";
|
||||
}
|
||||
default: break;
|
||||
}
|
||||
}
|
||||
return NULL; /* no useful name found */
|
||||
}
|
||||
|
||||
|
||||
static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
|
||||
Instruction i;
|
||||
if ((isLua(ci) && ci->tailcalls > 0) || !isLua(ci - 1))
|
||||
return NULL; /* calling function is not Lua (or is unknown) */
|
||||
ci--; /* calling function */
|
||||
i = ci_func(ci)->l.p->code[currentpc(L, ci)];
|
||||
if (GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL ||
|
||||
GET_OPCODE(i) == OP_TFORLOOP)
|
||||
return getobjname(L, ci, GETARG_A(i), name);
|
||||
else
|
||||
return NULL; /* no useful name can be found */
|
||||
}
|
||||
|
||||
|
||||
/* only ANSI way to check whether a pointer points to an array */
|
||||
static int isinstack (CallInfo *ci, const TValue *o) {
|
||||
StkId p;
|
||||
for (p = ci->base; p < ci->top; p++)
|
||||
if (o == p) return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
void luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
|
||||
const char *name = NULL;
|
||||
const char *t = luaT_typenames[ttype(o)];
|
||||
const char *kind = (isinstack(L->ci, o)) ?
|
||||
getobjname(L, L->ci, cast_int(o - L->base), &name) :
|
||||
NULL;
|
||||
if (kind)
|
||||
luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)",
|
||||
op, kind, name, t);
|
||||
else
|
||||
luaG_runerror(L, "attempt to %s a %s value", op, t);
|
||||
}
|
||||
|
||||
|
||||
void luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
|
||||
if (ttisstring(p1) || ttisnumber(p1)) p1 = p2;
|
||||
lua_assert(!ttisstring(p1) && !ttisnumber(p1));
|
||||
luaG_typeerror(L, p1, "concatenate");
|
||||
}
|
||||
|
||||
|
||||
void luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) {
|
||||
TValue temp;
|
||||
if (luaV_tonumber(p1, &temp) == NULL)
|
||||
p2 = p1; /* first operand is wrong */
|
||||
luaG_typeerror(L, p2, "perform arithmetic on");
|
||||
}
|
||||
|
||||
|
||||
int luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
|
||||
const char *t1 = luaT_typenames[ttype(p1)];
|
||||
const char *t2 = luaT_typenames[ttype(p2)];
|
||||
if (t1[2] == t2[2])
|
||||
luaG_runerror(L, "attempt to compare two %s values", t1);
|
||||
else
|
||||
luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static void addinfo (lua_State *L, const char *msg) {
|
||||
CallInfo *ci = L->ci;
|
||||
if (isLua(ci)) { /* is Lua code? */
|
||||
char buff[LUA_IDSIZE]; /* add file:line information */
|
||||
int line = currentline(L, ci);
|
||||
luaO_chunkid(buff, getstr(getluaproto(ci)->source), LUA_IDSIZE);
|
||||
luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaG_errormsg (lua_State *L) {
|
||||
if (L->errfunc != 0) { /* is there an error handling function? */
|
||||
StkId errfunc = restorestack(L, L->errfunc);
|
||||
if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);
|
||||
setobjs2s(L, L->top, L->top - 1); /* move argument */
|
||||
setobjs2s(L, L->top - 1, errfunc); /* push function */
|
||||
incr_top(L);
|
||||
luaD_call(L, L->top - 2, 1); /* call it */
|
||||
}
|
||||
luaD_throw(L, LUA_ERRRUN);
|
||||
}
|
||||
|
||||
|
||||
void luaG_runerror (lua_State *L, const char *fmt, ...) {
|
||||
va_list argp;
|
||||
va_start(argp, fmt);
|
||||
addinfo(L, luaO_pushvfstring(L, fmt, argp));
|
||||
va_end(argp);
|
||||
luaG_errormsg(L);
|
||||
}
|
||||
|
|
@ -1,33 +0,0 @@
|
|||
/*
|
||||
** $Id: ldebug.h,v 2.3.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Auxiliary functions from Debug Interface module
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef ldebug_h
|
||||
#define ldebug_h
|
||||
|
||||
|
||||
#include "lstate.h"
|
||||
|
||||
|
||||
#define pcRel(pc, p) (cast(int, (pc) - (p)->code) - 1)
|
||||
|
||||
#define getline(f,pc) (((f)->lineinfo) ? (f)->lineinfo[pc] : 0)
|
||||
|
||||
#define resethookcount(L) (L->hookcount = L->basehookcount)
|
||||
|
||||
|
||||
LUAI_FUNC void luaG_typeerror (lua_State *L, const TValue *o,
|
||||
const char *opname);
|
||||
LUAI_FUNC void luaG_concaterror (lua_State *L, StkId p1, StkId p2);
|
||||
LUAI_FUNC void luaG_aritherror (lua_State *L, const TValue *p1,
|
||||
const TValue *p2);
|
||||
LUAI_FUNC int luaG_ordererror (lua_State *L, const TValue *p1,
|
||||
const TValue *p2);
|
||||
LUAI_FUNC void luaG_runerror (lua_State *L, const char *fmt, ...);
|
||||
LUAI_FUNC void luaG_errormsg (lua_State *L);
|
||||
LUAI_FUNC int luaG_checkcode (const Proto *pt);
|
||||
LUAI_FUNC int luaG_checkopenop (Instruction i);
|
||||
|
||||
#endif
|
519
src/lua/ldo.c
519
src/lua/ldo.c
|
@ -1,519 +0,0 @@
|
|||
/*
|
||||
** $Id: ldo.c,v 2.38.1.4 2012/01/18 02:27:10 roberto Exp $
|
||||
** Stack and Call structure of Lua
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <setjmp.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#define ldo_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "ldebug.h"
|
||||
#include "ldo.h"
|
||||
#include "lfunc.h"
|
||||
#include "lgc.h"
|
||||
#include "lmem.h"
|
||||
#include "lobject.h"
|
||||
#include "lopcodes.h"
|
||||
#include "lparser.h"
|
||||
#include "lstate.h"
|
||||
#include "lstring.h"
|
||||
#include "ltable.h"
|
||||
#include "ltm.h"
|
||||
#include "lundump.h"
|
||||
#include "lvm.h"
|
||||
#include "lzio.h"
|
||||
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** Error-recovery functions
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
|
||||
/* chain list of long jump buffers */
|
||||
struct lua_longjmp {
|
||||
struct lua_longjmp *previous;
|
||||
luai_jmpbuf b;
|
||||
volatile int status; /* error code */
|
||||
};
|
||||
|
||||
|
||||
void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop) {
|
||||
switch (errcode) {
|
||||
case LUA_ERRMEM: {
|
||||
setsvalue2s(L, oldtop, luaS_newliteral(L, MEMERRMSG));
|
||||
break;
|
||||
}
|
||||
case LUA_ERRERR: {
|
||||
setsvalue2s(L, oldtop, luaS_newliteral(L, "error in error handling"));
|
||||
break;
|
||||
}
|
||||
case LUA_ERRSYNTAX:
|
||||
case LUA_ERRRUN: {
|
||||
setobjs2s(L, oldtop, L->top - 1); /* error message on current top */
|
||||
break;
|
||||
}
|
||||
}
|
||||
L->top = oldtop + 1;
|
||||
}
|
||||
|
||||
|
||||
static void restore_stack_limit (lua_State *L) {
|
||||
lua_assert(L->stack_last - L->stack == L->stacksize - EXTRA_STACK - 1);
|
||||
if (L->size_ci > LUAI_MAXCALLS) { /* there was an overflow? */
|
||||
int inuse = cast_int(L->ci - L->base_ci);
|
||||
if (inuse + 1 < LUAI_MAXCALLS) /* can `undo' overflow? */
|
||||
luaD_reallocCI(L, LUAI_MAXCALLS);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void resetstack (lua_State *L, int status) {
|
||||
L->ci = L->base_ci;
|
||||
L->base = L->ci->base;
|
||||
luaF_close(L, L->base); /* close eventual pending closures */
|
||||
luaD_seterrorobj(L, status, L->base);
|
||||
L->nCcalls = L->baseCcalls;
|
||||
L->allowhook = 1;
|
||||
restore_stack_limit(L);
|
||||
L->errfunc = 0;
|
||||
L->errorJmp = NULL;
|
||||
}
|
||||
|
||||
|
||||
void luaD_throw (lua_State *L, int errcode) {
|
||||
if (L->errorJmp) {
|
||||
L->errorJmp->status = errcode;
|
||||
LUAI_THROW(L, L->errorJmp);
|
||||
}
|
||||
else {
|
||||
L->status = cast_byte(errcode);
|
||||
if (G(L)->panic) {
|
||||
resetstack(L, errcode);
|
||||
lua_unlock(L);
|
||||
G(L)->panic(L);
|
||||
}
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
|
||||
struct lua_longjmp lj;
|
||||
lj.status = 0;
|
||||
lj.previous = L->errorJmp; /* chain new error handler */
|
||||
L->errorJmp = &lj;
|
||||
LUAI_TRY(L, &lj,
|
||||
(*f)(L, ud);
|
||||
);
|
||||
L->errorJmp = lj.previous; /* restore old error handler */
|
||||
return lj.status;
|
||||
}
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
static void correctstack (lua_State *L, TValue *oldstack) {
|
||||
CallInfo *ci;
|
||||
GCObject *up;
|
||||
L->top = (L->top - oldstack) + L->stack;
|
||||
for (up = L->openupval; up != NULL; up = up->gch.next)
|
||||
gco2uv(up)->v = (gco2uv(up)->v - oldstack) + L->stack;
|
||||
for (ci = L->base_ci; ci <= L->ci; ci++) {
|
||||
ci->top = (ci->top - oldstack) + L->stack;
|
||||
ci->base = (ci->base - oldstack) + L->stack;
|
||||
ci->func = (ci->func - oldstack) + L->stack;
|
||||
}
|
||||
L->base = (L->base - oldstack) + L->stack;
|
||||
}
|
||||
|
||||
|
||||
void luaD_reallocstack (lua_State *L, int newsize) {
|
||||
TValue *oldstack = L->stack;
|
||||
int realsize = newsize + 1 + EXTRA_STACK;
|
||||
lua_assert(L->stack_last - L->stack == L->stacksize - EXTRA_STACK - 1);
|
||||
luaM_reallocvector(L, L->stack, L->stacksize, realsize, TValue);
|
||||
L->stacksize = realsize;
|
||||
L->stack_last = L->stack+newsize;
|
||||
correctstack(L, oldstack);
|
||||
}
|
||||
|
||||
|
||||
void luaD_reallocCI (lua_State *L, int newsize) {
|
||||
CallInfo *oldci = L->base_ci;
|
||||
luaM_reallocvector(L, L->base_ci, L->size_ci, newsize, CallInfo);
|
||||
L->size_ci = newsize;
|
||||
L->ci = (L->ci - oldci) + L->base_ci;
|
||||
L->end_ci = L->base_ci + L->size_ci - 1;
|
||||
}
|
||||
|
||||
|
||||
void luaD_growstack (lua_State *L, int n) {
|
||||
if (n <= L->stacksize) /* double size is enough? */
|
||||
luaD_reallocstack(L, 2*L->stacksize);
|
||||
else
|
||||
luaD_reallocstack(L, L->stacksize + n);
|
||||
}
|
||||
|
||||
|
||||
static CallInfo *growCI (lua_State *L) {
|
||||
if (L->size_ci > LUAI_MAXCALLS) /* overflow while handling overflow? */
|
||||
luaD_throw(L, LUA_ERRERR);
|
||||
else {
|
||||
luaD_reallocCI(L, 2*L->size_ci);
|
||||
if (L->size_ci > LUAI_MAXCALLS)
|
||||
luaG_runerror(L, "stack overflow");
|
||||
}
|
||||
return ++L->ci;
|
||||
}
|
||||
|
||||
|
||||
void luaD_callhook (lua_State *L, int event, int line) {
|
||||
lua_Hook hook = L->hook;
|
||||
if (hook && L->allowhook) {
|
||||
ptrdiff_t top = savestack(L, L->top);
|
||||
ptrdiff_t ci_top = savestack(L, L->ci->top);
|
||||
lua_Debug ar;
|
||||
ar.event = event;
|
||||
ar.currentline = line;
|
||||
if (event == LUA_HOOKTAILRET)
|
||||
ar.i_ci = 0; /* tail call; no debug information about it */
|
||||
else
|
||||
ar.i_ci = cast_int(L->ci - L->base_ci);
|
||||
luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */
|
||||
L->ci->top = L->top + LUA_MINSTACK;
|
||||
lua_assert(L->ci->top <= L->stack_last);
|
||||
L->allowhook = 0; /* cannot call hooks inside a hook */
|
||||
lua_unlock(L);
|
||||
(*hook)(L, &ar);
|
||||
lua_lock(L);
|
||||
lua_assert(!L->allowhook);
|
||||
L->allowhook = 1;
|
||||
L->ci->top = restorestack(L, ci_top);
|
||||
L->top = restorestack(L, top);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static StkId adjust_varargs (lua_State *L, Proto *p, int actual) {
|
||||
int i;
|
||||
int nfixargs = p->numparams;
|
||||
Table *htab = NULL;
|
||||
StkId base, fixed;
|
||||
for (; actual < nfixargs; ++actual)
|
||||
setnilvalue(L->top++);
|
||||
#if defined(LUA_COMPAT_VARARG)
|
||||
if (p->is_vararg & VARARG_NEEDSARG) { /* compat. with old-style vararg? */
|
||||
int nvar = actual - nfixargs; /* number of extra arguments */
|
||||
lua_assert(p->is_vararg & VARARG_HASARG);
|
||||
luaC_checkGC(L);
|
||||
luaD_checkstack(L, p->maxstacksize);
|
||||
htab = luaH_new(L, nvar, 1); /* create `arg' table */
|
||||
for (i=0; i<nvar; i++) /* put extra arguments into `arg' table */
|
||||
setobj2n(L, luaH_setnum(L, htab, i+1), L->top - nvar + i);
|
||||
/* store counter in field `n' */
|
||||
setnvalue(luaH_setstr(L, htab, luaS_newliteral(L, "n")), cast_num(nvar));
|
||||
}
|
||||
#endif
|
||||
/* move fixed parameters to final position */
|
||||
fixed = L->top - actual; /* first fixed argument */
|
||||
base = L->top; /* final position of first argument */
|
||||
for (i=0; i<nfixargs; i++) {
|
||||
setobjs2s(L, L->top++, fixed+i);
|
||||
setnilvalue(fixed+i);
|
||||
}
|
||||
/* add `arg' parameter */
|
||||
if (htab) {
|
||||
sethvalue(L, L->top++, htab);
|
||||
lua_assert(iswhite(obj2gco(htab)));
|
||||
}
|
||||
return base;
|
||||
}
|
||||
|
||||
|
||||
static StkId tryfuncTM (lua_State *L, StkId func) {
|
||||
const TValue *tm = luaT_gettmbyobj(L, func, TM_CALL);
|
||||
StkId p;
|
||||
ptrdiff_t funcr = savestack(L, func);
|
||||
if (!ttisfunction(tm))
|
||||
luaG_typeerror(L, func, "call");
|
||||
/* Open a hole inside the stack at `func' */
|
||||
for (p = L->top; p > func; p--) setobjs2s(L, p, p-1);
|
||||
incr_top(L);
|
||||
func = restorestack(L, funcr); /* previous call may change stack */
|
||||
setobj2s(L, func, tm); /* tag method is the new function to be called */
|
||||
return func;
|
||||
}
|
||||
|
||||
|
||||
|
||||
#define inc_ci(L) \
|
||||
((L->ci == L->end_ci) ? growCI(L) : \
|
||||
(condhardstacktests(luaD_reallocCI(L, L->size_ci)), ++L->ci))
|
||||
|
||||
|
||||
int luaD_precall (lua_State *L, StkId func, int nresults) {
|
||||
LClosure *cl;
|
||||
ptrdiff_t funcr;
|
||||
if (!ttisfunction(func)) /* `func' is not a function? */
|
||||
func = tryfuncTM(L, func); /* check the `function' tag method */
|
||||
funcr = savestack(L, func);
|
||||
cl = &clvalue(func)->l;
|
||||
L->ci->savedpc = L->savedpc;
|
||||
if (!cl->isC) { /* Lua function? prepare its call */
|
||||
CallInfo *ci;
|
||||
StkId st, base;
|
||||
Proto *p = cl->p;
|
||||
luaD_checkstack(L, p->maxstacksize);
|
||||
func = restorestack(L, funcr);
|
||||
if (!p->is_vararg) { /* no varargs? */
|
||||
base = func + 1;
|
||||
if (L->top > base + p->numparams)
|
||||
L->top = base + p->numparams;
|
||||
}
|
||||
else { /* vararg function */
|
||||
int nargs = cast_int(L->top - func) - 1;
|
||||
base = adjust_varargs(L, p, nargs);
|
||||
func = restorestack(L, funcr); /* previous call may change the stack */
|
||||
}
|
||||
ci = inc_ci(L); /* now `enter' new function */
|
||||
ci->func = func;
|
||||
L->base = ci->base = base;
|
||||
ci->top = L->base + p->maxstacksize;
|
||||
lua_assert(ci->top <= L->stack_last);
|
||||
L->savedpc = p->code; /* starting point */
|
||||
ci->tailcalls = 0;
|
||||
ci->nresults = nresults;
|
||||
for (st = L->top; st < ci->top; st++)
|
||||
setnilvalue(st);
|
||||
L->top = ci->top;
|
||||
if (L->hookmask & LUA_MASKCALL) {
|
||||
L->savedpc++; /* hooks assume 'pc' is already incremented */
|
||||
luaD_callhook(L, LUA_HOOKCALL, -1);
|
||||
L->savedpc--; /* correct 'pc' */
|
||||
}
|
||||
return PCRLUA;
|
||||
}
|
||||
else { /* if is a C function, call it */
|
||||
CallInfo *ci;
|
||||
int n;
|
||||
luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */
|
||||
ci = inc_ci(L); /* now `enter' new function */
|
||||
ci->func = restorestack(L, funcr);
|
||||
L->base = ci->base = ci->func + 1;
|
||||
ci->top = L->top + LUA_MINSTACK;
|
||||
lua_assert(ci->top <= L->stack_last);
|
||||
ci->nresults = nresults;
|
||||
if (L->hookmask & LUA_MASKCALL)
|
||||
luaD_callhook(L, LUA_HOOKCALL, -1);
|
||||
lua_unlock(L);
|
||||
n = (*curr_func(L)->c.f)(L); /* do the actual call */
|
||||
lua_lock(L);
|
||||
if (n < 0) /* yielding? */
|
||||
return PCRYIELD;
|
||||
else {
|
||||
luaD_poscall(L, L->top - n);
|
||||
return PCRC;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static StkId callrethooks (lua_State *L, StkId firstResult) {
|
||||
ptrdiff_t fr = savestack(L, firstResult); /* next call may change stack */
|
||||
luaD_callhook(L, LUA_HOOKRET, -1);
|
||||
if (f_isLua(L->ci)) { /* Lua function? */
|
||||
while ((L->hookmask & LUA_MASKRET) && L->ci->tailcalls--) /* tail calls */
|
||||
luaD_callhook(L, LUA_HOOKTAILRET, -1);
|
||||
}
|
||||
return restorestack(L, fr);
|
||||
}
|
||||
|
||||
|
||||
int luaD_poscall (lua_State *L, StkId firstResult) {
|
||||
StkId res;
|
||||
int wanted, i;
|
||||
CallInfo *ci;
|
||||
if (L->hookmask & LUA_MASKRET)
|
||||
firstResult = callrethooks(L, firstResult);
|
||||
ci = L->ci--;
|
||||
res = ci->func; /* res == final position of 1st result */
|
||||
wanted = ci->nresults;
|
||||
L->base = (ci - 1)->base; /* restore base */
|
||||
L->savedpc = (ci - 1)->savedpc; /* restore savedpc */
|
||||
/* move results to correct place */
|
||||
for (i = wanted; i != 0 && firstResult < L->top; i--)
|
||||
setobjs2s(L, res++, firstResult++);
|
||||
while (i-- > 0)
|
||||
setnilvalue(res++);
|
||||
L->top = res;
|
||||
return (wanted - LUA_MULTRET); /* 0 iff wanted == LUA_MULTRET */
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Call a function (C or Lua). The function to be called is at *func.
|
||||
** The arguments are on the stack, right after the function.
|
||||
** When returns, all the results are on the stack, starting at the original
|
||||
** function position.
|
||||
*/
|
||||
void luaD_call (lua_State *L, StkId func, int nResults) {
|
||||
if (++L->nCcalls >= LUAI_MAXCCALLS) {
|
||||
if (L->nCcalls == LUAI_MAXCCALLS)
|
||||
luaG_runerror(L, "C stack overflow");
|
||||
else if (L->nCcalls >= (LUAI_MAXCCALLS + (LUAI_MAXCCALLS>>3)))
|
||||
luaD_throw(L, LUA_ERRERR); /* error while handing stack error */
|
||||
}
|
||||
if (luaD_precall(L, func, nResults) == PCRLUA) /* is a Lua function? */
|
||||
luaV_execute(L, 1); /* call it */
|
||||
L->nCcalls--;
|
||||
luaC_checkGC(L);
|
||||
}
|
||||
|
||||
|
||||
static void resume (lua_State *L, void *ud) {
|
||||
StkId firstArg = cast(StkId, ud);
|
||||
CallInfo *ci = L->ci;
|
||||
if (L->status == 0) { /* start coroutine? */
|
||||
lua_assert(ci == L->base_ci && firstArg > L->base);
|
||||
if (luaD_precall(L, firstArg - 1, LUA_MULTRET) != PCRLUA)
|
||||
return;
|
||||
}
|
||||
else { /* resuming from previous yield */
|
||||
lua_assert(L->status == LUA_YIELD);
|
||||
L->status = 0;
|
||||
if (!f_isLua(ci)) { /* `common' yield? */
|
||||
/* finish interrupted execution of `OP_CALL' */
|
||||
lua_assert(GET_OPCODE(*((ci-1)->savedpc - 1)) == OP_CALL ||
|
||||
GET_OPCODE(*((ci-1)->savedpc - 1)) == OP_TAILCALL);
|
||||
if (luaD_poscall(L, firstArg)) /* complete it... */
|
||||
L->top = L->ci->top; /* and correct top if not multiple results */
|
||||
}
|
||||
else /* yielded inside a hook: just continue its execution */
|
||||
L->base = L->ci->base;
|
||||
}
|
||||
luaV_execute(L, cast_int(L->ci - L->base_ci));
|
||||
}
|
||||
|
||||
|
||||
static int resume_error (lua_State *L, const char *msg) {
|
||||
L->top = L->ci->base;
|
||||
setsvalue2s(L, L->top, luaS_new(L, msg));
|
||||
incr_top(L);
|
||||
lua_unlock(L);
|
||||
return LUA_ERRRUN;
|
||||
}
|
||||
|
||||
|
||||
LUA_API int lua_resume (lua_State *L, int nargs) {
|
||||
int status;
|
||||
lua_lock(L);
|
||||
if (L->status != LUA_YIELD && (L->status != 0 || L->ci != L->base_ci))
|
||||
return resume_error(L, "cannot resume non-suspended coroutine");
|
||||
if (L->nCcalls >= LUAI_MAXCCALLS)
|
||||
return resume_error(L, "C stack overflow");
|
||||
luai_userstateresume(L, nargs);
|
||||
lua_assert(L->errfunc == 0);
|
||||
L->baseCcalls = ++L->nCcalls;
|
||||
status = luaD_rawrunprotected(L, resume, L->top - nargs);
|
||||
if (status != 0) { /* error? */
|
||||
L->status = cast_byte(status); /* mark thread as `dead' */
|
||||
luaD_seterrorobj(L, status, L->top);
|
||||
L->ci->top = L->top;
|
||||
}
|
||||
else {
|
||||
lua_assert(L->nCcalls == L->baseCcalls);
|
||||
status = L->status;
|
||||
}
|
||||
--L->nCcalls;
|
||||
lua_unlock(L);
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
LUA_API int lua_yield (lua_State *L, int nresults) {
|
||||
luai_userstateyield(L, nresults);
|
||||
lua_lock(L);
|
||||
if (L->nCcalls > L->baseCcalls)
|
||||
luaG_runerror(L, "attempt to yield across metamethod/C-call boundary");
|
||||
L->base = L->top - nresults; /* protect stack slots below */
|
||||
L->status = LUA_YIELD;
|
||||
lua_unlock(L);
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
int luaD_pcall (lua_State *L, Pfunc func, void *u,
|
||||
ptrdiff_t old_top, ptrdiff_t ef) {
|
||||
int status;
|
||||
unsigned short oldnCcalls = L->nCcalls;
|
||||
ptrdiff_t old_ci = saveci(L, L->ci);
|
||||
lu_byte old_allowhooks = L->allowhook;
|
||||
ptrdiff_t old_errfunc = L->errfunc;
|
||||
L->errfunc = ef;
|
||||
status = luaD_rawrunprotected(L, func, u);
|
||||
if (status != 0) { /* an error occurred? */
|
||||
StkId oldtop = restorestack(L, old_top);
|
||||
luaF_close(L, oldtop); /* close eventual pending closures */
|
||||
luaD_seterrorobj(L, status, oldtop);
|
||||
L->nCcalls = oldnCcalls;
|
||||
L->ci = restoreci(L, old_ci);
|
||||
L->base = L->ci->base;
|
||||
L->savedpc = L->ci->savedpc;
|
||||
L->allowhook = old_allowhooks;
|
||||
restore_stack_limit(L);
|
||||
}
|
||||
L->errfunc = old_errfunc;
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** Execute a protected parser.
|
||||
*/
|
||||
struct SParser { /* data to `f_parser' */
|
||||
ZIO *z;
|
||||
Mbuffer buff; /* buffer to be used by the scanner */
|
||||
const char *name;
|
||||
};
|
||||
|
||||
static void f_parser (lua_State *L, void *ud) {
|
||||
int i;
|
||||
Proto *tf;
|
||||
Closure *cl;
|
||||
struct SParser *p = cast(struct SParser *, ud);
|
||||
int c = luaZ_lookahead(p->z);
|
||||
luaC_checkGC(L);
|
||||
tf = ((c == LUA_SIGNATURE[0]) ? luaU_undump : luaY_parser)(L, p->z,
|
||||
&p->buff, p->name);
|
||||
cl = luaF_newLclosure(L, tf->nups, hvalue(gt(L)));
|
||||
cl->l.p = tf;
|
||||
for (i = 0; i < tf->nups; i++) /* initialize eventual upvalues */
|
||||
cl->l.upvals[i] = luaF_newupval(L);
|
||||
setclvalue(L, L->top, cl);
|
||||
incr_top(L);
|
||||
}
|
||||
|
||||
|
||||
int luaD_protectedparser (lua_State *L, ZIO *z, const char *name) {
|
||||
struct SParser p;
|
||||
int status;
|
||||
p.z = z; p.name = name;
|
||||
luaZ_initbuffer(L, &p.buff);
|
||||
status = luaD_pcall(L, f_parser, &p, savestack(L, L->top), L->errfunc);
|
||||
luaZ_freebuffer(L, &p.buff);
|
||||
return status;
|
||||
}
|
||||
|
||||
|
|
@ -1,57 +0,0 @@
|
|||
/*
|
||||
** $Id: ldo.h,v 2.7.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Stack and Call structure of Lua
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef ldo_h
|
||||
#define ldo_h
|
||||
|
||||
|
||||
#include "lobject.h"
|
||||
#include "lstate.h"
|
||||
#include "lzio.h"
|
||||
|
||||
|
||||
#define luaD_checkstack(L,n) \
|
||||
if ((char *)L->stack_last - (char *)L->top <= (n)*(int)sizeof(TValue)) \
|
||||
luaD_growstack(L, n); \
|
||||
else condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1));
|
||||
|
||||
|
||||
#define incr_top(L) {luaD_checkstack(L,1); L->top++;}
|
||||
|
||||
#define savestack(L,p) ((char *)(p) - (char *)L->stack)
|
||||
#define restorestack(L,n) ((TValue *)((char *)L->stack + (n)))
|
||||
|
||||
#define saveci(L,p) ((char *)(p) - (char *)L->base_ci)
|
||||
#define restoreci(L,n) ((CallInfo *)((char *)L->base_ci + (n)))
|
||||
|
||||
|
||||
/* results from luaD_precall */
|
||||
#define PCRLUA 0 /* initiated a call to a Lua function */
|
||||
#define PCRC 1 /* did a call to a C function */
|
||||
#define PCRYIELD 2 /* C funtion yielded */
|
||||
|
||||
|
||||
/* type of protected functions, to be ran by `runprotected' */
|
||||
typedef void (*Pfunc) (lua_State *L, void *ud);
|
||||
|
||||
LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name);
|
||||
LUAI_FUNC void luaD_callhook (lua_State *L, int event, int line);
|
||||
LUAI_FUNC int luaD_precall (lua_State *L, StkId func, int nresults);
|
||||
LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults);
|
||||
LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u,
|
||||
ptrdiff_t oldtop, ptrdiff_t ef);
|
||||
LUAI_FUNC int luaD_poscall (lua_State *L, StkId firstResult);
|
||||
LUAI_FUNC void luaD_reallocCI (lua_State *L, int newsize);
|
||||
LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize);
|
||||
LUAI_FUNC void luaD_growstack (lua_State *L, int n);
|
||||
|
||||
LUAI_FUNC void luaD_throw (lua_State *L, int errcode);
|
||||
LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud);
|
||||
|
||||
LUAI_FUNC void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop);
|
||||
|
||||
#endif
|
||||
|
164
src/lua/ldump.c
164
src/lua/ldump.c
|
@ -1,164 +0,0 @@
|
|||
/*
|
||||
** $Id: ldump.c,v 2.8.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** save precompiled Lua chunks
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#include <stddef.h>
|
||||
|
||||
#define ldump_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lobject.h"
|
||||
#include "lstate.h"
|
||||
#include "lundump.h"
|
||||
|
||||
typedef struct {
|
||||
lua_State* L;
|
||||
lua_Writer writer;
|
||||
void* data;
|
||||
int strip;
|
||||
int status;
|
||||
} DumpState;
|
||||
|
||||
#define DumpMem(b,n,size,D) DumpBlock(b,(n)*(size),D)
|
||||
#define DumpVar(x,D) DumpMem(&x,1,sizeof(x),D)
|
||||
|
||||
static void DumpBlock(const void* b, size_t size, DumpState* D)
|
||||
{
|
||||
if (D->status==0)
|
||||
{
|
||||
lua_unlock(D->L);
|
||||
D->status=(*D->writer)(D->L,b,size,D->data);
|
||||
lua_lock(D->L);
|
||||
}
|
||||
}
|
||||
|
||||
static void DumpChar(int y, DumpState* D)
|
||||
{
|
||||
char x=(char)y;
|
||||
DumpVar(x,D);
|
||||
}
|
||||
|
||||
static void DumpInt(int x, DumpState* D)
|
||||
{
|
||||
DumpVar(x,D);
|
||||
}
|
||||
|
||||
static void DumpNumber(lua_Number x, DumpState* D)
|
||||
{
|
||||
DumpVar(x,D);
|
||||
}
|
||||
|
||||
static void DumpVector(const void* b, int n, size_t size, DumpState* D)
|
||||
{
|
||||
DumpInt(n,D);
|
||||
DumpMem(b,n,size,D);
|
||||
}
|
||||
|
||||
static void DumpString(const TString* s, DumpState* D)
|
||||
{
|
||||
if (s==NULL || getstr(s)==NULL)
|
||||
{
|
||||
size_t size=0;
|
||||
DumpVar(size,D);
|
||||
}
|
||||
else
|
||||
{
|
||||
size_t size=s->tsv.len+1; /* include trailing '\0' */
|
||||
DumpVar(size,D);
|
||||
DumpBlock(getstr(s),size,D);
|
||||
}
|
||||
}
|
||||
|
||||
#define DumpCode(f,D) DumpVector(f->code,f->sizecode,sizeof(Instruction),D)
|
||||
|
||||
static void DumpFunction(const Proto* f, const TString* p, DumpState* D);
|
||||
|
||||
static void DumpConstants(const Proto* f, DumpState* D)
|
||||
{
|
||||
int i,n=f->sizek;
|
||||
DumpInt(n,D);
|
||||
for (i=0; i<n; i++)
|
||||
{
|
||||
const TValue* o=&f->k[i];
|
||||
DumpChar(ttype(o),D);
|
||||
switch (ttype(o))
|
||||
{
|
||||
case LUA_TNIL:
|
||||
break;
|
||||
case LUA_TBOOLEAN:
|
||||
DumpChar(bvalue(o),D);
|
||||
break;
|
||||
case LUA_TNUMBER:
|
||||
DumpNumber(nvalue(o),D);
|
||||
break;
|
||||
case LUA_TSTRING:
|
||||
DumpString(rawtsvalue(o),D);
|
||||
break;
|
||||
default:
|
||||
lua_assert(0); /* cannot happen */
|
||||
break;
|
||||
}
|
||||
}
|
||||
n=f->sizep;
|
||||
DumpInt(n,D);
|
||||
for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D);
|
||||
}
|
||||
|
||||
static void DumpDebug(const Proto* f, DumpState* D)
|
||||
{
|
||||
int i,n;
|
||||
n= (D->strip) ? 0 : f->sizelineinfo;
|
||||
DumpVector(f->lineinfo,n,sizeof(int),D);
|
||||
n= (D->strip) ? 0 : f->sizelocvars;
|
||||
DumpInt(n,D);
|
||||
for (i=0; i<n; i++)
|
||||
{
|
||||
DumpString(f->locvars[i].varname,D);
|
||||
DumpInt(f->locvars[i].startpc,D);
|
||||
DumpInt(f->locvars[i].endpc,D);
|
||||
}
|
||||
n= (D->strip) ? 0 : f->sizeupvalues;
|
||||
DumpInt(n,D);
|
||||
for (i=0; i<n; i++) DumpString(f->upvalues[i],D);
|
||||
}
|
||||
|
||||
static void DumpFunction(const Proto* f, const TString* p, DumpState* D)
|
||||
{
|
||||
DumpString((f->source==p || D->strip) ? NULL : f->source,D);
|
||||
DumpInt(f->linedefined,D);
|
||||
DumpInt(f->lastlinedefined,D);
|
||||
DumpChar(f->nups,D);
|
||||
DumpChar(f->numparams,D);
|
||||
DumpChar(f->is_vararg,D);
|
||||
DumpChar(f->maxstacksize,D);
|
||||
DumpCode(f,D);
|
||||
DumpConstants(f,D);
|
||||
DumpDebug(f,D);
|
||||
}
|
||||
|
||||
static void DumpHeader(DumpState* D)
|
||||
{
|
||||
char h[LUAC_HEADERSIZE];
|
||||
luaU_header(h);
|
||||
DumpBlock(h,LUAC_HEADERSIZE,D);
|
||||
}
|
||||
|
||||
/*
|
||||
** dump Lua function as precompiled chunk
|
||||
*/
|
||||
int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip)
|
||||
{
|
||||
DumpState D;
|
||||
D.L=L;
|
||||
D.writer=w;
|
||||
D.data=data;
|
||||
D.strip=strip;
|
||||
D.status=0;
|
||||
DumpHeader(&D);
|
||||
DumpFunction(f,NULL,&D);
|
||||
return D.status;
|
||||
}
|
174
src/lua/lfunc.c
174
src/lua/lfunc.c
|
@ -1,174 +0,0 @@
|
|||
/*
|
||||
** $Id: lfunc.c,v 2.12.1.2 2007/12/28 14:58:43 roberto Exp $
|
||||
** Auxiliary functions to manipulate prototypes and closures
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <stddef.h>
|
||||
|
||||
#define lfunc_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lfunc.h"
|
||||
#include "lgc.h"
|
||||
#include "lmem.h"
|
||||
#include "lobject.h"
|
||||
#include "lstate.h"
|
||||
|
||||
|
||||
|
||||
Closure *luaF_newCclosure (lua_State *L, int nelems, Table *e) {
|
||||
Closure *c = cast(Closure *, luaM_malloc(L, sizeCclosure(nelems)));
|
||||
luaC_link(L, obj2gco(c), LUA_TFUNCTION);
|
||||
c->c.isC = 1;
|
||||
c->c.env = e;
|
||||
c->c.nupvalues = cast_byte(nelems);
|
||||
return c;
|
||||
}
|
||||
|
||||
|
||||
Closure *luaF_newLclosure (lua_State *L, int nelems, Table *e) {
|
||||
Closure *c = cast(Closure *, luaM_malloc(L, sizeLclosure(nelems)));
|
||||
luaC_link(L, obj2gco(c), LUA_TFUNCTION);
|
||||
c->l.isC = 0;
|
||||
c->l.env = e;
|
||||
c->l.nupvalues = cast_byte(nelems);
|
||||
while (nelems--) c->l.upvals[nelems] = NULL;
|
||||
return c;
|
||||
}
|
||||
|
||||
|
||||
UpVal *luaF_newupval (lua_State *L) {
|
||||
UpVal *uv = luaM_new(L, UpVal);
|
||||
luaC_link(L, obj2gco(uv), LUA_TUPVAL);
|
||||
uv->v = &uv->u.value;
|
||||
setnilvalue(uv->v);
|
||||
return uv;
|
||||
}
|
||||
|
||||
|
||||
UpVal *luaF_findupval (lua_State *L, StkId level) {
|
||||
global_State *g = G(L);
|
||||
GCObject **pp = &L->openupval;
|
||||
UpVal *p;
|
||||
UpVal *uv;
|
||||
while (*pp != NULL && (p = ngcotouv(*pp))->v >= level) {
|
||||
lua_assert(p->v != &p->u.value);
|
||||
if (p->v == level) { /* found a corresponding upvalue? */
|
||||
if (isdead(g, obj2gco(p))) /* is it dead? */
|
||||
changewhite(obj2gco(p)); /* ressurect it */
|
||||
return p;
|
||||
}
|
||||
pp = &p->next;
|
||||
}
|
||||
uv = luaM_new(L, UpVal); /* not found: create a new one */
|
||||
uv->tt = LUA_TUPVAL;
|
||||
uv->marked = luaC_white(g);
|
||||
uv->v = level; /* current value lives in the stack */
|
||||
uv->next = *pp; /* chain it in the proper position */
|
||||
*pp = obj2gco(uv);
|
||||
uv->u.l.prev = &g->uvhead; /* double link it in `uvhead' list */
|
||||
uv->u.l.next = g->uvhead.u.l.next;
|
||||
uv->u.l.next->u.l.prev = uv;
|
||||
g->uvhead.u.l.next = uv;
|
||||
lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
|
||||
return uv;
|
||||
}
|
||||
|
||||
|
||||
static void unlinkupval (UpVal *uv) {
|
||||
lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
|
||||
uv->u.l.next->u.l.prev = uv->u.l.prev; /* remove from `uvhead' list */
|
||||
uv->u.l.prev->u.l.next = uv->u.l.next;
|
||||
}
|
||||
|
||||
|
||||
void luaF_freeupval (lua_State *L, UpVal *uv) {
|
||||
if (uv->v != &uv->u.value) /* is it open? */
|
||||
unlinkupval(uv); /* remove from open list */
|
||||
luaM_free(L, uv); /* free upvalue */
|
||||
}
|
||||
|
||||
|
||||
void luaF_close (lua_State *L, StkId level) {
|
||||
UpVal *uv;
|
||||
global_State *g = G(L);
|
||||
while (L->openupval != NULL && (uv = ngcotouv(L->openupval))->v >= level) {
|
||||
GCObject *o = obj2gco(uv);
|
||||
lua_assert(!isblack(o) && uv->v != &uv->u.value);
|
||||
L->openupval = uv->next; /* remove from `open' list */
|
||||
if (isdead(g, o))
|
||||
luaF_freeupval(L, uv); /* free upvalue */
|
||||
else {
|
||||
unlinkupval(uv);
|
||||
setobj(L, &uv->u.value, uv->v);
|
||||
uv->v = &uv->u.value; /* now current value lives here */
|
||||
luaC_linkupval(L, uv); /* link upvalue into `gcroot' list */
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Proto *luaF_newproto (lua_State *L) {
|
||||
Proto *f = luaM_new(L, Proto);
|
||||
luaC_link(L, obj2gco(f), LUA_TPROTO);
|
||||
f->k = NULL;
|
||||
f->sizek = 0;
|
||||
f->p = NULL;
|
||||
f->sizep = 0;
|
||||
f->code = NULL;
|
||||
f->sizecode = 0;
|
||||
f->sizelineinfo = 0;
|
||||
f->sizeupvalues = 0;
|
||||
f->nups = 0;
|
||||
f->upvalues = NULL;
|
||||
f->numparams = 0;
|
||||
f->is_vararg = 0;
|
||||
f->maxstacksize = 0;
|
||||
f->lineinfo = NULL;
|
||||
f->sizelocvars = 0;
|
||||
f->locvars = NULL;
|
||||
f->linedefined = 0;
|
||||
f->lastlinedefined = 0;
|
||||
f->source = NULL;
|
||||
return f;
|
||||
}
|
||||
|
||||
|
||||
void luaF_freeproto (lua_State *L, Proto *f) {
|
||||
luaM_freearray(L, f->code, f->sizecode, Instruction);
|
||||
luaM_freearray(L, f->p, f->sizep, Proto *);
|
||||
luaM_freearray(L, f->k, f->sizek, TValue);
|
||||
luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);
|
||||
luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);
|
||||
luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *);
|
||||
luaM_free(L, f);
|
||||
}
|
||||
|
||||
|
||||
void luaF_freeclosure (lua_State *L, Closure *c) {
|
||||
int size = (c->c.isC) ? sizeCclosure(c->c.nupvalues) :
|
||||
sizeLclosure(c->l.nupvalues);
|
||||
luaM_freemem(L, c, size);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Look for n-th local variable at line `line' in function `func'.
|
||||
** Returns NULL if not found.
|
||||
*/
|
||||
const char *luaF_getlocalname (const Proto *f, int local_number, int pc) {
|
||||
int i;
|
||||
for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) {
|
||||
if (pc < f->locvars[i].endpc) { /* is variable active? */
|
||||
local_number--;
|
||||
if (local_number == 0)
|
||||
return getstr(f->locvars[i].varname);
|
||||
}
|
||||
}
|
||||
return NULL; /* not found */
|
||||
}
|
||||
|
|
@ -1,34 +0,0 @@
|
|||
/*
|
||||
** $Id: lfunc.h,v 2.4.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Auxiliary functions to manipulate prototypes and closures
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef lfunc_h
|
||||
#define lfunc_h
|
||||
|
||||
|
||||
#include "lobject.h"
|
||||
|
||||
|
||||
#define sizeCclosure(n) (cast(int, sizeof(CClosure)) + \
|
||||
cast(int, sizeof(TValue)*((n)-1)))
|
||||
|
||||
#define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \
|
||||
cast(int, sizeof(TValue *)*((n)-1)))
|
||||
|
||||
|
||||
LUAI_FUNC Proto *luaF_newproto (lua_State *L);
|
||||
LUAI_FUNC Closure *luaF_newCclosure (lua_State *L, int nelems, Table *e);
|
||||
LUAI_FUNC Closure *luaF_newLclosure (lua_State *L, int nelems, Table *e);
|
||||
LUAI_FUNC UpVal *luaF_newupval (lua_State *L);
|
||||
LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
|
||||
LUAI_FUNC void luaF_close (lua_State *L, StkId level);
|
||||
LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
|
||||
LUAI_FUNC void luaF_freeclosure (lua_State *L, Closure *c);
|
||||
LUAI_FUNC void luaF_freeupval (lua_State *L, UpVal *uv);
|
||||
LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
|
||||
int pc);
|
||||
|
||||
|
||||
#endif
|
710
src/lua/lgc.c
710
src/lua/lgc.c
|
@ -1,710 +0,0 @@
|
|||
/*
|
||||
** $Id: lgc.c,v 2.38.1.2 2011/03/18 18:05:38 roberto Exp $
|
||||
** Garbage Collector
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#include <string.h>
|
||||
|
||||
#define lgc_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "ldebug.h"
|
||||
#include "ldo.h"
|
||||
#include "lfunc.h"
|
||||
#include "lgc.h"
|
||||
#include "lmem.h"
|
||||
#include "lobject.h"
|
||||
#include "lstate.h"
|
||||
#include "lstring.h"
|
||||
#include "ltable.h"
|
||||
#include "ltm.h"
|
||||
|
||||
|
||||
#define GCSTEPSIZE 1024u
|
||||
#define GCSWEEPMAX 40
|
||||
#define GCSWEEPCOST 10
|
||||
#define GCFINALIZECOST 100
|
||||
|
||||
|
||||
#define maskmarks cast_byte(~(bitmask(BLACKBIT)|WHITEBITS))
|
||||
|
||||
#define makewhite(g,x) \
|
||||
((x)->gch.marked = cast_byte(((x)->gch.marked & maskmarks) | luaC_white(g)))
|
||||
|
||||
#define white2gray(x) reset2bits((x)->gch.marked, WHITE0BIT, WHITE1BIT)
|
||||
#define black2gray(x) resetbit((x)->gch.marked, BLACKBIT)
|
||||
|
||||
#define stringmark(s) reset2bits((s)->tsv.marked, WHITE0BIT, WHITE1BIT)
|
||||
|
||||
|
||||
#define isfinalized(u) testbit((u)->marked, FINALIZEDBIT)
|
||||
#define markfinalized(u) l_setbit((u)->marked, FINALIZEDBIT)
|
||||
|
||||
|
||||
#define KEYWEAK bitmask(KEYWEAKBIT)
|
||||
#define VALUEWEAK bitmask(VALUEWEAKBIT)
|
||||
|
||||
|
||||
|
||||
#define markvalue(g,o) { checkconsistency(o); \
|
||||
if (iscollectable(o) && iswhite(gcvalue(o))) reallymarkobject(g,gcvalue(o)); }
|
||||
|
||||
#define markobject(g,t) { if (iswhite(obj2gco(t))) \
|
||||
reallymarkobject(g, obj2gco(t)); }
|
||||
|
||||
|
||||
#define setthreshold(g) (g->GCthreshold = (g->estimate/100) * g->gcpause)
|
||||
|
||||
|
||||
static void removeentry (Node *n) {
|
||||
lua_assert(ttisnil(gval(n)));
|
||||
if (iscollectable(gkey(n)))
|
||||
setttype(gkey(n), LUA_TDEADKEY); /* dead key; remove it */
|
||||
}
|
||||
|
||||
|
||||
static void reallymarkobject (global_State *g, GCObject *o) {
|
||||
lua_assert(iswhite(o) && !isdead(g, o));
|
||||
white2gray(o);
|
||||
switch (o->gch.tt) {
|
||||
case LUA_TSTRING: {
|
||||
return;
|
||||
}
|
||||
case LUA_TUSERDATA: {
|
||||
Table *mt = gco2u(o)->metatable;
|
||||
gray2black(o); /* udata are never gray */
|
||||
if (mt) markobject(g, mt);
|
||||
markobject(g, gco2u(o)->env);
|
||||
return;
|
||||
}
|
||||
case LUA_TUPVAL: {
|
||||
UpVal *uv = gco2uv(o);
|
||||
markvalue(g, uv->v);
|
||||
if (uv->v == &uv->u.value) /* closed? */
|
||||
gray2black(o); /* open upvalues are never black */
|
||||
return;
|
||||
}
|
||||
case LUA_TFUNCTION: {
|
||||
gco2cl(o)->c.gclist = g->gray;
|
||||
g->gray = o;
|
||||
break;
|
||||
}
|
||||
case LUA_TTABLE: {
|
||||
gco2h(o)->gclist = g->gray;
|
||||
g->gray = o;
|
||||
break;
|
||||
}
|
||||
case LUA_TTHREAD: {
|
||||
gco2th(o)->gclist = g->gray;
|
||||
g->gray = o;
|
||||
break;
|
||||
}
|
||||
case LUA_TPROTO: {
|
||||
gco2p(o)->gclist = g->gray;
|
||||
g->gray = o;
|
||||
break;
|
||||
}
|
||||
default: lua_assert(0);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void marktmu (global_State *g) {
|
||||
GCObject *u = g->tmudata;
|
||||
if (u) {
|
||||
do {
|
||||
u = u->gch.next;
|
||||
makewhite(g, u); /* may be marked, if left from previous GC */
|
||||
reallymarkobject(g, u);
|
||||
} while (u != g->tmudata);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* move `dead' udata that need finalization to list `tmudata' */
|
||||
size_t luaC_separateudata (lua_State *L, int all) {
|
||||
global_State *g = G(L);
|
||||
size_t deadmem = 0;
|
||||
GCObject **p = &g->mainthread->next;
|
||||
GCObject *curr;
|
||||
while ((curr = *p) != NULL) {
|
||||
if (!(iswhite(curr) || all) || isfinalized(gco2u(curr)))
|
||||
p = &curr->gch.next; /* don't bother with them */
|
||||
else if (fasttm(L, gco2u(curr)->metatable, TM_GC) == NULL) {
|
||||
markfinalized(gco2u(curr)); /* don't need finalization */
|
||||
p = &curr->gch.next;
|
||||
}
|
||||
else { /* must call its gc method */
|
||||
deadmem += sizeudata(gco2u(curr));
|
||||
markfinalized(gco2u(curr));
|
||||
*p = curr->gch.next;
|
||||
/* link `curr' at the end of `tmudata' list */
|
||||
if (g->tmudata == NULL) /* list is empty? */
|
||||
g->tmudata = curr->gch.next = curr; /* creates a circular list */
|
||||
else {
|
||||
curr->gch.next = g->tmudata->gch.next;
|
||||
g->tmudata->gch.next = curr;
|
||||
g->tmudata = curr;
|
||||
}
|
||||
}
|
||||
}
|
||||
return deadmem;
|
||||
}
|
||||
|
||||
|
||||
static int traversetable (global_State *g, Table *h) {
|
||||
int i;
|
||||
int weakkey = 0;
|
||||
int weakvalue = 0;
|
||||
const TValue *mode;
|
||||
if (h->metatable)
|
||||
markobject(g, h->metatable);
|
||||
mode = gfasttm(g, h->metatable, TM_MODE);
|
||||
if (mode && ttisstring(mode)) { /* is there a weak mode? */
|
||||
weakkey = (strchr(svalue(mode), 'k') != NULL);
|
||||
weakvalue = (strchr(svalue(mode), 'v') != NULL);
|
||||
if (weakkey || weakvalue) { /* is really weak? */
|
||||
h->marked &= ~(KEYWEAK | VALUEWEAK); /* clear bits */
|
||||
h->marked |= cast_byte((weakkey << KEYWEAKBIT) |
|
||||
(weakvalue << VALUEWEAKBIT));
|
||||
h->gclist = g->weak; /* must be cleared after GC, ... */
|
||||
g->weak = obj2gco(h); /* ... so put in the appropriate list */
|
||||
}
|
||||
}
|
||||
if (weakkey && weakvalue) return 1;
|
||||
if (!weakvalue) {
|
||||
i = h->sizearray;
|
||||
while (i--)
|
||||
markvalue(g, &h->array[i]);
|
||||
}
|
||||
i = sizenode(h);
|
||||
while (i--) {
|
||||
Node *n = gnode(h, i);
|
||||
lua_assert(ttype(gkey(n)) != LUA_TDEADKEY || ttisnil(gval(n)));
|
||||
if (ttisnil(gval(n)))
|
||||
removeentry(n); /* remove empty entries */
|
||||
else {
|
||||
lua_assert(!ttisnil(gkey(n)));
|
||||
if (!weakkey) markvalue(g, gkey(n));
|
||||
if (!weakvalue) markvalue(g, gval(n));
|
||||
}
|
||||
}
|
||||
return weakkey || weakvalue;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** All marks are conditional because a GC may happen while the
|
||||
** prototype is still being created
|
||||
*/
|
||||
static void traverseproto (global_State *g, Proto *f) {
|
||||
int i;
|
||||
if (f->source) stringmark(f->source);
|
||||
for (i=0; i<f->sizek; i++) /* mark literals */
|
||||
markvalue(g, &f->k[i]);
|
||||
for (i=0; i<f->sizeupvalues; i++) { /* mark upvalue names */
|
||||
if (f->upvalues[i])
|
||||
stringmark(f->upvalues[i]);
|
||||
}
|
||||
for (i=0; i<f->sizep; i++) { /* mark nested protos */
|
||||
if (f->p[i])
|
||||
markobject(g, f->p[i]);
|
||||
}
|
||||
for (i=0; i<f->sizelocvars; i++) { /* mark local-variable names */
|
||||
if (f->locvars[i].varname)
|
||||
stringmark(f->locvars[i].varname);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
static void traverseclosure (global_State *g, Closure *cl) {
|
||||
markobject(g, cl->c.env);
|
||||
if (cl->c.isC) {
|
||||
int i;
|
||||
for (i=0; i<cl->c.nupvalues; i++) /* mark its upvalues */
|
||||
markvalue(g, &cl->c.upvalue[i]);
|
||||
}
|
||||
else {
|
||||
int i;
|
||||
lua_assert(cl->l.nupvalues == cl->l.p->nups);
|
||||
markobject(g, cl->l.p);
|
||||
for (i=0; i<cl->l.nupvalues; i++) /* mark its upvalues */
|
||||
markobject(g, cl->l.upvals[i]);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void checkstacksizes (lua_State *L, StkId max) {
|
||||
int ci_used = cast_int(L->ci - L->base_ci); /* number of `ci' in use */
|
||||
int s_used = cast_int(max - L->stack); /* part of stack in use */
|
||||
if (L->size_ci > LUAI_MAXCALLS) /* handling overflow? */
|
||||
return; /* do not touch the stacks */
|
||||
if (4*ci_used < L->size_ci && 2*BASIC_CI_SIZE < L->size_ci)
|
||||
luaD_reallocCI(L, L->size_ci/2); /* still big enough... */
|
||||
condhardstacktests(luaD_reallocCI(L, ci_used + 1));
|
||||
if (4*s_used < L->stacksize &&
|
||||
2*(BASIC_STACK_SIZE+EXTRA_STACK) < L->stacksize)
|
||||
luaD_reallocstack(L, L->stacksize/2); /* still big enough... */
|
||||
condhardstacktests(luaD_reallocstack(L, s_used));
|
||||
}
|
||||
|
||||
|
||||
static void traversestack (global_State *g, lua_State *l) {
|
||||
StkId o, lim;
|
||||
CallInfo *ci;
|
||||
markvalue(g, gt(l));
|
||||
lim = l->top;
|
||||
for (ci = l->base_ci; ci <= l->ci; ci++) {
|
||||
lua_assert(ci->top <= l->stack_last);
|
||||
if (lim < ci->top) lim = ci->top;
|
||||
}
|
||||
for (o = l->stack; o < l->top; o++)
|
||||
markvalue(g, o);
|
||||
for (; o <= lim; o++)
|
||||
setnilvalue(o);
|
||||
checkstacksizes(l, lim);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** traverse one gray object, turning it to black.
|
||||
** Returns `quantity' traversed.
|
||||
*/
|
||||
static l_mem propagatemark (global_State *g) {
|
||||
GCObject *o = g->gray;
|
||||
lua_assert(isgray(o));
|
||||
gray2black(o);
|
||||
switch (o->gch.tt) {
|
||||
case LUA_TTABLE: {
|
||||
Table *h = gco2h(o);
|
||||
g->gray = h->gclist;
|
||||
if (traversetable(g, h)) /* table is weak? */
|
||||
black2gray(o); /* keep it gray */
|
||||
return sizeof(Table) + sizeof(TValue) * h->sizearray +
|
||||
sizeof(Node) * sizenode(h);
|
||||
}
|
||||
case LUA_TFUNCTION: {
|
||||
Closure *cl = gco2cl(o);
|
||||
g->gray = cl->c.gclist;
|
||||
traverseclosure(g, cl);
|
||||
return (cl->c.isC) ? sizeCclosure(cl->c.nupvalues) :
|
||||
sizeLclosure(cl->l.nupvalues);
|
||||
}
|
||||
case LUA_TTHREAD: {
|
||||
lua_State *th = gco2th(o);
|
||||
g->gray = th->gclist;
|
||||
th->gclist = g->grayagain;
|
||||
g->grayagain = o;
|
||||
black2gray(o);
|
||||
traversestack(g, th);
|
||||
return sizeof(lua_State) + sizeof(TValue) * th->stacksize +
|
||||
sizeof(CallInfo) * th->size_ci;
|
||||
}
|
||||
case LUA_TPROTO: {
|
||||
Proto *p = gco2p(o);
|
||||
g->gray = p->gclist;
|
||||
traverseproto(g, p);
|
||||
return sizeof(Proto) + sizeof(Instruction) * p->sizecode +
|
||||
sizeof(Proto *) * p->sizep +
|
||||
sizeof(TValue) * p->sizek +
|
||||
sizeof(int) * p->sizelineinfo +
|
||||
sizeof(LocVar) * p->sizelocvars +
|
||||
sizeof(TString *) * p->sizeupvalues;
|
||||
}
|
||||
default: lua_assert(0); return 0;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static size_t propagateall (global_State *g) {
|
||||
size_t m = 0;
|
||||
while (g->gray) m += propagatemark(g);
|
||||
return m;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** The next function tells whether a key or value can be cleared from
|
||||
** a weak table. Non-collectable objects are never removed from weak
|
||||
** tables. Strings behave as `values', so are never removed too. for
|
||||
** other objects: if really collected, cannot keep them; for userdata
|
||||
** being finalized, keep them in keys, but not in values
|
||||
*/
|
||||
static int iscleared (const TValue *o, int iskey) {
|
||||
if (!iscollectable(o)) return 0;
|
||||
if (ttisstring(o)) {
|
||||
stringmark(rawtsvalue(o)); /* strings are `values', so are never weak */
|
||||
return 0;
|
||||
}
|
||||
return iswhite(gcvalue(o)) ||
|
||||
(ttisuserdata(o) && (!iskey && isfinalized(uvalue(o))));
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** clear collected entries from weaktables
|
||||
*/
|
||||
static void cleartable (GCObject *l) {
|
||||
while (l) {
|
||||
Table *h = gco2h(l);
|
||||
int i = h->sizearray;
|
||||
lua_assert(testbit(h->marked, VALUEWEAKBIT) ||
|
||||
testbit(h->marked, KEYWEAKBIT));
|
||||
if (testbit(h->marked, VALUEWEAKBIT)) {
|
||||
while (i--) {
|
||||
TValue *o = &h->array[i];
|
||||
if (iscleared(o, 0)) /* value was collected? */
|
||||
setnilvalue(o); /* remove value */
|
||||
}
|
||||
}
|
||||
i = sizenode(h);
|
||||
while (i--) {
|
||||
Node *n = gnode(h, i);
|
||||
if (!ttisnil(gval(n)) && /* non-empty entry? */
|
||||
(iscleared(key2tval(n), 1) || iscleared(gval(n), 0))) {
|
||||
setnilvalue(gval(n)); /* remove value ... */
|
||||
removeentry(n); /* remove entry from table */
|
||||
}
|
||||
}
|
||||
l = h->gclist;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void freeobj (lua_State *L, GCObject *o) {
|
||||
switch (o->gch.tt) {
|
||||
case LUA_TPROTO: luaF_freeproto(L, gco2p(o)); break;
|
||||
case LUA_TFUNCTION: luaF_freeclosure(L, gco2cl(o)); break;
|
||||
case LUA_TUPVAL: luaF_freeupval(L, gco2uv(o)); break;
|
||||
case LUA_TTABLE: luaH_free(L, gco2h(o)); break;
|
||||
case LUA_TTHREAD: {
|
||||
lua_assert(gco2th(o) != L && gco2th(o) != G(L)->mainthread);
|
||||
luaE_freethread(L, gco2th(o));
|
||||
break;
|
||||
}
|
||||
case LUA_TSTRING: {
|
||||
G(L)->strt.nuse--;
|
||||
luaM_freemem(L, o, sizestring(gco2ts(o)));
|
||||
break;
|
||||
}
|
||||
case LUA_TUSERDATA: {
|
||||
luaM_freemem(L, o, sizeudata(gco2u(o)));
|
||||
break;
|
||||
}
|
||||
default: lua_assert(0);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
#define sweepwholelist(L,p) sweeplist(L,p,MAX_LUMEM)
|
||||
|
||||
|
||||
static GCObject **sweeplist (lua_State *L, GCObject **p, lu_mem count) {
|
||||
GCObject *curr;
|
||||
global_State *g = G(L);
|
||||
int deadmask = otherwhite(g);
|
||||
while ((curr = *p) != NULL && count-- > 0) {
|
||||
if (curr->gch.tt == LUA_TTHREAD) /* sweep open upvalues of each thread */
|
||||
sweepwholelist(L, &gco2th(curr)->openupval);
|
||||
if ((curr->gch.marked ^ WHITEBITS) & deadmask) { /* not dead? */
|
||||
lua_assert(!isdead(g, curr) || testbit(curr->gch.marked, FIXEDBIT));
|
||||
makewhite(g, curr); /* make it white (for next cycle) */
|
||||
p = &curr->gch.next;
|
||||
}
|
||||
else { /* must erase `curr' */
|
||||
lua_assert(isdead(g, curr) || deadmask == bitmask(SFIXEDBIT));
|
||||
*p = curr->gch.next;
|
||||
if (curr == g->rootgc) /* is the first element of the list? */
|
||||
g->rootgc = curr->gch.next; /* adjust first */
|
||||
freeobj(L, curr);
|
||||
}
|
||||
}
|
||||
return p;
|
||||
}
|
||||
|
||||
|
||||
static void checkSizes (lua_State *L) {
|
||||
global_State *g = G(L);
|
||||
/* check size of string hash */
|
||||
if (g->strt.nuse < cast(lu_int32, g->strt.size/4) &&
|
||||
g->strt.size > MINSTRTABSIZE*2)
|
||||
luaS_resize(L, g->strt.size/2); /* table is too big */
|
||||
/* check size of buffer */
|
||||
if (luaZ_sizebuffer(&g->buff) > LUA_MINBUFFER*2) { /* buffer too big? */
|
||||
size_t newsize = luaZ_sizebuffer(&g->buff) / 2;
|
||||
luaZ_resizebuffer(L, &g->buff, newsize);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void GCTM (lua_State *L) {
|
||||
global_State *g = G(L);
|
||||
GCObject *o = g->tmudata->gch.next; /* get first element */
|
||||
Udata *udata = rawgco2u(o);
|
||||
const TValue *tm;
|
||||
/* remove udata from `tmudata' */
|
||||
if (o == g->tmudata) /* last element? */
|
||||
g->tmudata = NULL;
|
||||
else
|
||||
g->tmudata->gch.next = udata->uv.next;
|
||||
udata->uv.next = g->mainthread->next; /* return it to `root' list */
|
||||
g->mainthread->next = o;
|
||||
makewhite(g, o);
|
||||
tm = fasttm(L, udata->uv.metatable, TM_GC);
|
||||
if (tm != NULL) {
|
||||
lu_byte oldah = L->allowhook;
|
||||
lu_mem oldt = g->GCthreshold;
|
||||
L->allowhook = 0; /* stop debug hooks during GC tag method */
|
||||
g->GCthreshold = 2*g->totalbytes; /* avoid GC steps */
|
||||
setobj2s(L, L->top, tm);
|
||||
setuvalue(L, L->top+1, udata);
|
||||
L->top += 2;
|
||||
luaD_call(L, L->top - 2, 0);
|
||||
L->allowhook = oldah; /* restore hooks */
|
||||
g->GCthreshold = oldt; /* restore threshold */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Call all GC tag methods
|
||||
*/
|
||||
void luaC_callGCTM (lua_State *L) {
|
||||
while (G(L)->tmudata)
|
||||
GCTM(L);
|
||||
}
|
||||
|
||||
|
||||
void luaC_freeall (lua_State *L) {
|
||||
global_State *g = G(L);
|
||||
int i;
|
||||
g->currentwhite = WHITEBITS | bitmask(SFIXEDBIT); /* mask to collect all elements */
|
||||
sweepwholelist(L, &g->rootgc);
|
||||
for (i = 0; i < g->strt.size; i++) /* free all string lists */
|
||||
sweepwholelist(L, &g->strt.hash[i]);
|
||||
}
|
||||
|
||||
|
||||
static void markmt (global_State *g) {
|
||||
int i;
|
||||
for (i=0; i<NUM_TAGS; i++)
|
||||
if (g->mt[i]) markobject(g, g->mt[i]);
|
||||
}
|
||||
|
||||
|
||||
/* mark root set */
|
||||
static void markroot (lua_State *L) {
|
||||
global_State *g = G(L);
|
||||
g->gray = NULL;
|
||||
g->grayagain = NULL;
|
||||
g->weak = NULL;
|
||||
markobject(g, g->mainthread);
|
||||
/* make global table be traversed before main stack */
|
||||
markvalue(g, gt(g->mainthread));
|
||||
markvalue(g, registry(L));
|
||||
markmt(g);
|
||||
g->gcstate = GCSpropagate;
|
||||
}
|
||||
|
||||
|
||||
static void remarkupvals (global_State *g) {
|
||||
UpVal *uv;
|
||||
for (uv = g->uvhead.u.l.next; uv != &g->uvhead; uv = uv->u.l.next) {
|
||||
lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
|
||||
if (isgray(obj2gco(uv)))
|
||||
markvalue(g, uv->v);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void atomic (lua_State *L) {
|
||||
global_State *g = G(L);
|
||||
size_t udsize; /* total size of userdata to be finalized */
|
||||
/* remark occasional upvalues of (maybe) dead threads */
|
||||
remarkupvals(g);
|
||||
/* traverse objects cautch by write barrier and by 'remarkupvals' */
|
||||
propagateall(g);
|
||||
/* remark weak tables */
|
||||
g->gray = g->weak;
|
||||
g->weak = NULL;
|
||||
lua_assert(!iswhite(obj2gco(g->mainthread)));
|
||||
markobject(g, L); /* mark running thread */
|
||||
markmt(g); /* mark basic metatables (again) */
|
||||
propagateall(g);
|
||||
/* remark gray again */
|
||||
g->gray = g->grayagain;
|
||||
g->grayagain = NULL;
|
||||
propagateall(g);
|
||||
udsize = luaC_separateudata(L, 0); /* separate userdata to be finalized */
|
||||
marktmu(g); /* mark `preserved' userdata */
|
||||
udsize += propagateall(g); /* remark, to propagate `preserveness' */
|
||||
cleartable(g->weak); /* remove collected objects from weak tables */
|
||||
/* flip current white */
|
||||
g->currentwhite = cast_byte(otherwhite(g));
|
||||
g->sweepstrgc = 0;
|
||||
g->sweepgc = &g->rootgc;
|
||||
g->gcstate = GCSsweepstring;
|
||||
g->estimate = g->totalbytes - udsize; /* first estimate */
|
||||
}
|
||||
|
||||
|
||||
static l_mem singlestep (lua_State *L) {
|
||||
global_State *g = G(L);
|
||||
/*lua_checkmemory(L);*/
|
||||
switch (g->gcstate) {
|
||||
case GCSpause: {
|
||||
markroot(L); /* start a new collection */
|
||||
return 0;
|
||||
}
|
||||
case GCSpropagate: {
|
||||
if (g->gray)
|
||||
return propagatemark(g);
|
||||
else { /* no more `gray' objects */
|
||||
atomic(L); /* finish mark phase */
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
case GCSsweepstring: {
|
||||
lu_mem old = g->totalbytes;
|
||||
sweepwholelist(L, &g->strt.hash[g->sweepstrgc++]);
|
||||
if (g->sweepstrgc >= g->strt.size) /* nothing more to sweep? */
|
||||
g->gcstate = GCSsweep; /* end sweep-string phase */
|
||||
lua_assert(old >= g->totalbytes);
|
||||
g->estimate -= old - g->totalbytes;
|
||||
return GCSWEEPCOST;
|
||||
}
|
||||
case GCSsweep: {
|
||||
lu_mem old = g->totalbytes;
|
||||
g->sweepgc = sweeplist(L, g->sweepgc, GCSWEEPMAX);
|
||||
if (*g->sweepgc == NULL) { /* nothing more to sweep? */
|
||||
checkSizes(L);
|
||||
g->gcstate = GCSfinalize; /* end sweep phase */
|
||||
}
|
||||
lua_assert(old >= g->totalbytes);
|
||||
g->estimate -= old - g->totalbytes;
|
||||
return GCSWEEPMAX*GCSWEEPCOST;
|
||||
}
|
||||
case GCSfinalize: {
|
||||
if (g->tmudata) {
|
||||
GCTM(L);
|
||||
if (g->estimate > GCFINALIZECOST)
|
||||
g->estimate -= GCFINALIZECOST;
|
||||
return GCFINALIZECOST;
|
||||
}
|
||||
else {
|
||||
g->gcstate = GCSpause; /* end collection */
|
||||
g->gcdept = 0;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
default: lua_assert(0); return 0;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaC_step (lua_State *L) {
|
||||
global_State *g = G(L);
|
||||
l_mem lim = (GCSTEPSIZE/100) * g->gcstepmul;
|
||||
if (lim == 0)
|
||||
lim = (MAX_LUMEM-1)/2; /* no limit */
|
||||
g->gcdept += g->totalbytes - g->GCthreshold;
|
||||
do {
|
||||
lim -= singlestep(L);
|
||||
if (g->gcstate == GCSpause)
|
||||
break;
|
||||
} while (lim > 0);
|
||||
if (g->gcstate != GCSpause) {
|
||||
if (g->gcdept < GCSTEPSIZE)
|
||||
g->GCthreshold = g->totalbytes + GCSTEPSIZE; /* - lim/g->gcstepmul;*/
|
||||
else {
|
||||
g->gcdept -= GCSTEPSIZE;
|
||||
g->GCthreshold = g->totalbytes;
|
||||
}
|
||||
}
|
||||
else {
|
||||
setthreshold(g);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaC_fullgc (lua_State *L) {
|
||||
global_State *g = G(L);
|
||||
if (g->gcstate <= GCSpropagate) {
|
||||
/* reset sweep marks to sweep all elements (returning them to white) */
|
||||
g->sweepstrgc = 0;
|
||||
g->sweepgc = &g->rootgc;
|
||||
/* reset other collector lists */
|
||||
g->gray = NULL;
|
||||
g->grayagain = NULL;
|
||||
g->weak = NULL;
|
||||
g->gcstate = GCSsweepstring;
|
||||
}
|
||||
lua_assert(g->gcstate != GCSpause && g->gcstate != GCSpropagate);
|
||||
/* finish any pending sweep phase */
|
||||
while (g->gcstate != GCSfinalize) {
|
||||
lua_assert(g->gcstate == GCSsweepstring || g->gcstate == GCSsweep);
|
||||
singlestep(L);
|
||||
}
|
||||
markroot(L);
|
||||
while (g->gcstate != GCSpause) {
|
||||
singlestep(L);
|
||||
}
|
||||
setthreshold(g);
|
||||
}
|
||||
|
||||
|
||||
void luaC_barrierf (lua_State *L, GCObject *o, GCObject *v) {
|
||||
global_State *g = G(L);
|
||||
lua_assert(isblack(o) && iswhite(v) && !isdead(g, v) && !isdead(g, o));
|
||||
lua_assert(g->gcstate != GCSfinalize && g->gcstate != GCSpause);
|
||||
lua_assert(ttype(&o->gch) != LUA_TTABLE);
|
||||
/* must keep invariant? */
|
||||
if (g->gcstate == GCSpropagate)
|
||||
reallymarkobject(g, v); /* restore invariant */
|
||||
else /* don't mind */
|
||||
makewhite(g, o); /* mark as white just to avoid other barriers */
|
||||
}
|
||||
|
||||
|
||||
void luaC_barrierback (lua_State *L, Table *t) {
|
||||
global_State *g = G(L);
|
||||
GCObject *o = obj2gco(t);
|
||||
lua_assert(isblack(o) && !isdead(g, o));
|
||||
lua_assert(g->gcstate != GCSfinalize && g->gcstate != GCSpause);
|
||||
black2gray(o); /* make table gray (again) */
|
||||
t->gclist = g->grayagain;
|
||||
g->grayagain = o;
|
||||
}
|
||||
|
||||
|
||||
void luaC_link (lua_State *L, GCObject *o, lu_byte tt) {
|
||||
global_State *g = G(L);
|
||||
o->gch.next = g->rootgc;
|
||||
g->rootgc = o;
|
||||
o->gch.marked = luaC_white(g);
|
||||
o->gch.tt = tt;
|
||||
}
|
||||
|
||||
|
||||
void luaC_linkupval (lua_State *L, UpVal *uv) {
|
||||
global_State *g = G(L);
|
||||
GCObject *o = obj2gco(uv);
|
||||
o->gch.next = g->rootgc; /* link upvalue into `rootgc' list */
|
||||
g->rootgc = o;
|
||||
if (isgray(o)) {
|
||||
if (g->gcstate == GCSpropagate) {
|
||||
gray2black(o); /* closed upvalues need barrier */
|
||||
luaC_barrier(L, uv, uv->v);
|
||||
}
|
||||
else { /* sweep phase: sweep it (turning it into white) */
|
||||
makewhite(g, o);
|
||||
lua_assert(g->gcstate != GCSfinalize && g->gcstate != GCSpause);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
110
src/lua/lgc.h
110
src/lua/lgc.h
|
@ -1,110 +0,0 @@
|
|||
/*
|
||||
** $Id: lgc.h,v 2.15.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Garbage Collector
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef lgc_h
|
||||
#define lgc_h
|
||||
|
||||
|
||||
#include "lobject.h"
|
||||
|
||||
|
||||
/*
|
||||
** Possible states of the Garbage Collector
|
||||
*/
|
||||
#define GCSpause 0
|
||||
#define GCSpropagate 1
|
||||
#define GCSsweepstring 2
|
||||
#define GCSsweep 3
|
||||
#define GCSfinalize 4
|
||||
|
||||
|
||||
/*
|
||||
** some userful bit tricks
|
||||
*/
|
||||
#define resetbits(x,m) ((x) &= cast(lu_byte, ~(m)))
|
||||
#define setbits(x,m) ((x) |= (m))
|
||||
#define testbits(x,m) ((x) & (m))
|
||||
#define bitmask(b) (1<<(b))
|
||||
#define bit2mask(b1,b2) (bitmask(b1) | bitmask(b2))
|
||||
#define l_setbit(x,b) setbits(x, bitmask(b))
|
||||
#define resetbit(x,b) resetbits(x, bitmask(b))
|
||||
#define testbit(x,b) testbits(x, bitmask(b))
|
||||
#define set2bits(x,b1,b2) setbits(x, (bit2mask(b1, b2)))
|
||||
#define reset2bits(x,b1,b2) resetbits(x, (bit2mask(b1, b2)))
|
||||
#define test2bits(x,b1,b2) testbits(x, (bit2mask(b1, b2)))
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** Layout for bit use in `marked' field:
|
||||
** bit 0 - object is white (type 0)
|
||||
** bit 1 - object is white (type 1)
|
||||
** bit 2 - object is black
|
||||
** bit 3 - for userdata: has been finalized
|
||||
** bit 3 - for tables: has weak keys
|
||||
** bit 4 - for tables: has weak values
|
||||
** bit 5 - object is fixed (should not be collected)
|
||||
** bit 6 - object is "super" fixed (only the main thread)
|
||||
*/
|
||||
|
||||
|
||||
#define WHITE0BIT 0
|
||||
#define WHITE1BIT 1
|
||||
#define BLACKBIT 2
|
||||
#define FINALIZEDBIT 3
|
||||
#define KEYWEAKBIT 3
|
||||
#define VALUEWEAKBIT 4
|
||||
#define FIXEDBIT 5
|
||||
#define SFIXEDBIT 6
|
||||
#define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT)
|
||||
|
||||
|
||||
#define iswhite(x) test2bits((x)->gch.marked, WHITE0BIT, WHITE1BIT)
|
||||
#define isblack(x) testbit((x)->gch.marked, BLACKBIT)
|
||||
#define isgray(x) (!isblack(x) && !iswhite(x))
|
||||
|
||||
#define otherwhite(g) (g->currentwhite ^ WHITEBITS)
|
||||
#define isdead(g,v) ((v)->gch.marked & otherwhite(g) & WHITEBITS)
|
||||
|
||||
#define changewhite(x) ((x)->gch.marked ^= WHITEBITS)
|
||||
#define gray2black(x) l_setbit((x)->gch.marked, BLACKBIT)
|
||||
|
||||
#define valiswhite(x) (iscollectable(x) && iswhite(gcvalue(x)))
|
||||
|
||||
#define luaC_white(g) cast(lu_byte, (g)->currentwhite & WHITEBITS)
|
||||
|
||||
|
||||
#define luaC_checkGC(L) { \
|
||||
condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1)); \
|
||||
if (G(L)->totalbytes >= G(L)->GCthreshold) \
|
||||
luaC_step(L); }
|
||||
|
||||
|
||||
#define luaC_barrier(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p))) \
|
||||
luaC_barrierf(L,obj2gco(p),gcvalue(v)); }
|
||||
|
||||
#define luaC_barriert(L,t,v) { if (valiswhite(v) && isblack(obj2gco(t))) \
|
||||
luaC_barrierback(L,t); }
|
||||
|
||||
#define luaC_objbarrier(L,p,o) \
|
||||
{ if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) \
|
||||
luaC_barrierf(L,obj2gco(p),obj2gco(o)); }
|
||||
|
||||
#define luaC_objbarriert(L,t,o) \
|
||||
{ if (iswhite(obj2gco(o)) && isblack(obj2gco(t))) luaC_barrierback(L,t); }
|
||||
|
||||
LUAI_FUNC size_t luaC_separateudata (lua_State *L, int all);
|
||||
LUAI_FUNC void luaC_callGCTM (lua_State *L);
|
||||
LUAI_FUNC void luaC_freeall (lua_State *L);
|
||||
LUAI_FUNC void luaC_step (lua_State *L);
|
||||
LUAI_FUNC void luaC_fullgc (lua_State *L);
|
||||
LUAI_FUNC void luaC_link (lua_State *L, GCObject *o, lu_byte tt);
|
||||
LUAI_FUNC void luaC_linkupval (lua_State *L, UpVal *uv);
|
||||
LUAI_FUNC void luaC_barrierf (lua_State *L, GCObject *o, GCObject *v);
|
||||
LUAI_FUNC void luaC_barrierback (lua_State *L, Table *t);
|
||||
|
||||
|
||||
#endif
|
|
@ -1,39 +0,0 @@
|
|||
/*
|
||||
** $Id: linit.c,v 1.14.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Initialization of libraries for lua.c
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#define linit_c
|
||||
#define LUA_LIB
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lualib.h"
|
||||
#include "lauxlib.h"
|
||||
|
||||
|
||||
static const luaL_Reg lualibs[] = {
|
||||
{"", luaopen_base},
|
||||
{LUA_LOADLIBNAME, luaopen_package},
|
||||
{LUA_TABLIBNAME, luaopen_table},
|
||||
{LUA_IOLIBNAME, luaopen_io},
|
||||
{LUA_OSLIBNAME, luaopen_os},
|
||||
{LUA_STRLIBNAME, luaopen_string},
|
||||
{LUA_MATHLIBNAME, luaopen_math},
|
||||
{LUA_DBLIBNAME, luaopen_debug},
|
||||
{LUA_BITLIBNAME, luaopen_bit},
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
|
||||
LUALIB_API void luaL_openlibs (lua_State *L) {
|
||||
const luaL_Reg *lib = lualibs;
|
||||
for (; lib->func; lib++) {
|
||||
lua_pushcfunction(L, lib->func);
|
||||
lua_pushstring(L, lib->name);
|
||||
lua_call(L, 1, 0);
|
||||
}
|
||||
}
|
||||
|
556
src/lua/liolib.c
556
src/lua/liolib.c
|
@ -1,556 +0,0 @@
|
|||
/*
|
||||
** $Id: liolib.c,v 2.73.1.4 2010/05/14 15:33:51 roberto Exp $
|
||||
** Standard I/O (and system) library
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <errno.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#define liolib_c
|
||||
#define LUA_LIB
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lauxlib.h"
|
||||
#include "lualib.h"
|
||||
|
||||
|
||||
|
||||
#define IO_INPUT 1
|
||||
#define IO_OUTPUT 2
|
||||
|
||||
|
||||
static const char *const fnames[] = {"input", "output"};
|
||||
|
||||
|
||||
static int pushresult (lua_State *L, int i, const char *filename) {
|
||||
int en = errno; /* calls to Lua API may change this value */
|
||||
if (i) {
|
||||
lua_pushboolean(L, 1);
|
||||
return 1;
|
||||
}
|
||||
else {
|
||||
lua_pushnil(L);
|
||||
if (filename)
|
||||
lua_pushfstring(L, "%s: %s", filename, strerror(en));
|
||||
else
|
||||
lua_pushfstring(L, "%s", strerror(en));
|
||||
lua_pushinteger(L, en);
|
||||
return 3;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void fileerror (lua_State *L, int arg, const char *filename) {
|
||||
lua_pushfstring(L, "%s: %s", filename, strerror(errno));
|
||||
luaL_argerror(L, arg, lua_tostring(L, -1));
|
||||
}
|
||||
|
||||
|
||||
#define tofilep(L) ((FILE **)luaL_checkudata(L, 1, LUA_FILEHANDLE))
|
||||
|
||||
|
||||
static int io_type (lua_State *L) {
|
||||
void *ud;
|
||||
luaL_checkany(L, 1);
|
||||
ud = lua_touserdata(L, 1);
|
||||
lua_getfield(L, LUA_REGISTRYINDEX, LUA_FILEHANDLE);
|
||||
if (ud == NULL || !lua_getmetatable(L, 1) || !lua_rawequal(L, -2, -1))
|
||||
lua_pushnil(L); /* not a file */
|
||||
else if (*((FILE **)ud) == NULL)
|
||||
lua_pushliteral(L, "closed file");
|
||||
else
|
||||
lua_pushliteral(L, "file");
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static FILE *tofile (lua_State *L) {
|
||||
FILE **f = tofilep(L);
|
||||
if (*f == NULL)
|
||||
luaL_error(L, "attempt to use a closed file");
|
||||
return *f;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** When creating file handles, always creates a `closed' file handle
|
||||
** before opening the actual file; so, if there is a memory error, the
|
||||
** file is not left opened.
|
||||
*/
|
||||
static FILE **newfile (lua_State *L) {
|
||||
FILE **pf = (FILE **)lua_newuserdata(L, sizeof(FILE *));
|
||||
*pf = NULL; /* file handle is currently `closed' */
|
||||
luaL_getmetatable(L, LUA_FILEHANDLE);
|
||||
lua_setmetatable(L, -2);
|
||||
return pf;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** function to (not) close the standard files stdin, stdout, and stderr
|
||||
*/
|
||||
static int io_noclose (lua_State *L) {
|
||||
lua_pushnil(L);
|
||||
lua_pushliteral(L, "cannot close standard file");
|
||||
return 2;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** function to close 'popen' files
|
||||
*/
|
||||
static int io_pclose (lua_State *L) {
|
||||
FILE **p = tofilep(L);
|
||||
int ok = lua_pclose(L, *p);
|
||||
*p = NULL;
|
||||
return pushresult(L, ok, NULL);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** function to close regular files
|
||||
*/
|
||||
static int io_fclose (lua_State *L) {
|
||||
FILE **p = tofilep(L);
|
||||
int ok = (fclose(*p) == 0);
|
||||
*p = NULL;
|
||||
return pushresult(L, ok, NULL);
|
||||
}
|
||||
|
||||
|
||||
static int aux_close (lua_State *L) {
|
||||
lua_getfenv(L, 1);
|
||||
lua_getfield(L, -1, "__close");
|
||||
return (lua_tocfunction(L, -1))(L);
|
||||
}
|
||||
|
||||
|
||||
static int io_close (lua_State *L) {
|
||||
if (lua_isnone(L, 1))
|
||||
lua_rawgeti(L, LUA_ENVIRONINDEX, IO_OUTPUT);
|
||||
tofile(L); /* make sure argument is a file */
|
||||
return aux_close(L);
|
||||
}
|
||||
|
||||
|
||||
static int io_gc (lua_State *L) {
|
||||
FILE *f = *tofilep(L);
|
||||
/* ignore closed files */
|
||||
if (f != NULL)
|
||||
aux_close(L);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int io_tostring (lua_State *L) {
|
||||
FILE *f = *tofilep(L);
|
||||
if (f == NULL)
|
||||
lua_pushliteral(L, "file (closed)");
|
||||
else
|
||||
lua_pushfstring(L, "file (%p)", f);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int io_open (lua_State *L) {
|
||||
const char *filename = luaL_checkstring(L, 1);
|
||||
const char *mode = luaL_optstring(L, 2, "r");
|
||||
FILE **pf = newfile(L);
|
||||
*pf = fopen(filename, mode);
|
||||
return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** this function has a separated environment, which defines the
|
||||
** correct __close for 'popen' files
|
||||
*/
|
||||
static int io_popen (lua_State *L) {
|
||||
const char *filename = luaL_checkstring(L, 1);
|
||||
const char *mode = luaL_optstring(L, 2, "r");
|
||||
FILE **pf = newfile(L);
|
||||
*pf = lua_popen(L, filename, mode);
|
||||
return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
|
||||
}
|
||||
|
||||
|
||||
static int io_tmpfile (lua_State *L) {
|
||||
FILE **pf = newfile(L);
|
||||
*pf = tmpfile();
|
||||
return (*pf == NULL) ? pushresult(L, 0, NULL) : 1;
|
||||
}
|
||||
|
||||
|
||||
static FILE *getiofile (lua_State *L, int findex) {
|
||||
FILE *f;
|
||||
lua_rawgeti(L, LUA_ENVIRONINDEX, findex);
|
||||
f = *(FILE **)lua_touserdata(L, -1);
|
||||
if (f == NULL)
|
||||
luaL_error(L, "standard %s file is closed", fnames[findex - 1]);
|
||||
return f;
|
||||
}
|
||||
|
||||
|
||||
static int g_iofile (lua_State *L, int f, const char *mode) {
|
||||
if (!lua_isnoneornil(L, 1)) {
|
||||
const char *filename = lua_tostring(L, 1);
|
||||
if (filename) {
|
||||
FILE **pf = newfile(L);
|
||||
*pf = fopen(filename, mode);
|
||||
if (*pf == NULL)
|
||||
fileerror(L, 1, filename);
|
||||
}
|
||||
else {
|
||||
tofile(L); /* check that it's a valid file handle */
|
||||
lua_pushvalue(L, 1);
|
||||
}
|
||||
lua_rawseti(L, LUA_ENVIRONINDEX, f);
|
||||
}
|
||||
/* return current value */
|
||||
lua_rawgeti(L, LUA_ENVIRONINDEX, f);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int io_input (lua_State *L) {
|
||||
return g_iofile(L, IO_INPUT, "r");
|
||||
}
|
||||
|
||||
|
||||
static int io_output (lua_State *L) {
|
||||
return g_iofile(L, IO_OUTPUT, "w");
|
||||
}
|
||||
|
||||
|
||||
static int io_readline (lua_State *L);
|
||||
|
||||
|
||||
static void aux_lines (lua_State *L, int idx, int toclose) {
|
||||
lua_pushvalue(L, idx);
|
||||
lua_pushboolean(L, toclose); /* close/not close file when finished */
|
||||
lua_pushcclosure(L, io_readline, 2);
|
||||
}
|
||||
|
||||
|
||||
static int f_lines (lua_State *L) {
|
||||
tofile(L); /* check that it's a valid file handle */
|
||||
aux_lines(L, 1, 0);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int io_lines (lua_State *L) {
|
||||
if (lua_isnoneornil(L, 1)) { /* no arguments? */
|
||||
/* will iterate over default input */
|
||||
lua_rawgeti(L, LUA_ENVIRONINDEX, IO_INPUT);
|
||||
return f_lines(L);
|
||||
}
|
||||
else {
|
||||
const char *filename = luaL_checkstring(L, 1);
|
||||
FILE **pf = newfile(L);
|
||||
*pf = fopen(filename, "r");
|
||||
if (*pf == NULL)
|
||||
fileerror(L, 1, filename);
|
||||
aux_lines(L, lua_gettop(L), 1);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** READ
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
|
||||
static int read_number (lua_State *L, FILE *f) {
|
||||
lua_Number d;
|
||||
if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) {
|
||||
lua_pushnumber(L, d);
|
||||
return 1;
|
||||
}
|
||||
else {
|
||||
lua_pushnil(L); /* "result" to be removed */
|
||||
return 0; /* read fails */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int test_eof (lua_State *L, FILE *f) {
|
||||
int c = getc(f);
|
||||
ungetc(c, f);
|
||||
lua_pushlstring(L, NULL, 0);
|
||||
return (c != EOF);
|
||||
}
|
||||
|
||||
|
||||
static int read_line (lua_State *L, FILE *f) {
|
||||
luaL_Buffer b;
|
||||
luaL_buffinit(L, &b);
|
||||
for (;;) {
|
||||
size_t l;
|
||||
char *p = luaL_prepbuffer(&b);
|
||||
if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) { /* eof? */
|
||||
luaL_pushresult(&b); /* close buffer */
|
||||
return (lua_objlen(L, -1) > 0); /* check whether read something */
|
||||
}
|
||||
l = strlen(p);
|
||||
if (l == 0 || p[l-1] != '\n')
|
||||
luaL_addsize(&b, l);
|
||||
else {
|
||||
luaL_addsize(&b, l - 1); /* do not include `eol' */
|
||||
luaL_pushresult(&b); /* close buffer */
|
||||
return 1; /* read at least an `eol' */
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int read_chars (lua_State *L, FILE *f, size_t n) {
|
||||
size_t rlen; /* how much to read */
|
||||
size_t nr; /* number of chars actually read */
|
||||
luaL_Buffer b;
|
||||
luaL_buffinit(L, &b);
|
||||
rlen = LUAL_BUFFERSIZE; /* try to read that much each time */
|
||||
do {
|
||||
char *p = luaL_prepbuffer(&b);
|
||||
if (rlen > n) rlen = n; /* cannot read more than asked */
|
||||
nr = fread(p, sizeof(char), rlen, f);
|
||||
luaL_addsize(&b, nr);
|
||||
n -= nr; /* still have to read `n' chars */
|
||||
} while (n > 0 && nr == rlen); /* until end of count or eof */
|
||||
luaL_pushresult(&b); /* close buffer */
|
||||
return (n == 0 || lua_objlen(L, -1) > 0);
|
||||
}
|
||||
|
||||
|
||||
static int g_read (lua_State *L, FILE *f, int first) {
|
||||
int nargs = lua_gettop(L) - 1;
|
||||
int success;
|
||||
int n;
|
||||
clearerr(f);
|
||||
if (nargs == 0) { /* no arguments? */
|
||||
success = read_line(L, f);
|
||||
n = first+1; /* to return 1 result */
|
||||
}
|
||||
else { /* ensure stack space for all results and for auxlib's buffer */
|
||||
luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");
|
||||
success = 1;
|
||||
for (n = first; nargs-- && success; n++) {
|
||||
if (lua_type(L, n) == LUA_TNUMBER) {
|
||||
size_t l = (size_t)lua_tointeger(L, n);
|
||||
success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);
|
||||
}
|
||||
else {
|
||||
const char *p = lua_tostring(L, n);
|
||||
luaL_argcheck(L, p && p[0] == '*', n, "invalid option");
|
||||
switch (p[1]) {
|
||||
case 'n': /* number */
|
||||
success = read_number(L, f);
|
||||
break;
|
||||
case 'l': /* line */
|
||||
success = read_line(L, f);
|
||||
break;
|
||||
case 'a': /* file */
|
||||
read_chars(L, f, ~((size_t)0)); /* read MAX_SIZE_T chars */
|
||||
success = 1; /* always success */
|
||||
break;
|
||||
default:
|
||||
return luaL_argerror(L, n, "invalid format");
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if (ferror(f))
|
||||
return pushresult(L, 0, NULL);
|
||||
if (!success) {
|
||||
lua_pop(L, 1); /* remove last result */
|
||||
lua_pushnil(L); /* push nil instead */
|
||||
}
|
||||
return n - first;
|
||||
}
|
||||
|
||||
|
||||
static int io_read (lua_State *L) {
|
||||
return g_read(L, getiofile(L, IO_INPUT), 1);
|
||||
}
|
||||
|
||||
|
||||
static int f_read (lua_State *L) {
|
||||
return g_read(L, tofile(L), 2);
|
||||
}
|
||||
|
||||
|
||||
static int io_readline (lua_State *L) {
|
||||
FILE *f = *(FILE **)lua_touserdata(L, lua_upvalueindex(1));
|
||||
int sucess;
|
||||
if (f == NULL) /* file is already closed? */
|
||||
luaL_error(L, "file is already closed");
|
||||
sucess = read_line(L, f);
|
||||
if (ferror(f))
|
||||
return luaL_error(L, "%s", strerror(errno));
|
||||
if (sucess) return 1;
|
||||
else { /* EOF */
|
||||
if (lua_toboolean(L, lua_upvalueindex(2))) { /* generator created file? */
|
||||
lua_settop(L, 0);
|
||||
lua_pushvalue(L, lua_upvalueindex(1));
|
||||
aux_close(L); /* close it */
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
static int g_write (lua_State *L, FILE *f, int arg) {
|
||||
int nargs = lua_gettop(L) - 1;
|
||||
int status = 1;
|
||||
for (; nargs--; arg++) {
|
||||
if (lua_type(L, arg) == LUA_TNUMBER) {
|
||||
/* optimization: could be done exactly as for strings */
|
||||
status = status &&
|
||||
fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;
|
||||
}
|
||||
else {
|
||||
size_t l;
|
||||
const char *s = luaL_checklstring(L, arg, &l);
|
||||
status = status && (fwrite(s, sizeof(char), l, f) == l);
|
||||
}
|
||||
}
|
||||
return pushresult(L, status, NULL);
|
||||
}
|
||||
|
||||
|
||||
static int io_write (lua_State *L) {
|
||||
return g_write(L, getiofile(L, IO_OUTPUT), 1);
|
||||
}
|
||||
|
||||
|
||||
static int f_write (lua_State *L) {
|
||||
return g_write(L, tofile(L), 2);
|
||||
}
|
||||
|
||||
|
||||
static int f_seek (lua_State *L) {
|
||||
static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};
|
||||
static const char *const modenames[] = {"set", "cur", "end", NULL};
|
||||
FILE *f = tofile(L);
|
||||
int op = luaL_checkoption(L, 2, "cur", modenames);
|
||||
long offset = luaL_optlong(L, 3, 0);
|
||||
op = fseek(f, offset, mode[op]);
|
||||
if (op)
|
||||
return pushresult(L, 0, NULL); /* error */
|
||||
else {
|
||||
lua_pushinteger(L, ftell(f));
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int f_setvbuf (lua_State *L) {
|
||||
static const int mode[] = {_IONBF, _IOFBF, _IOLBF};
|
||||
static const char *const modenames[] = {"no", "full", "line", NULL};
|
||||
FILE *f = tofile(L);
|
||||
int op = luaL_checkoption(L, 2, NULL, modenames);
|
||||
lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE);
|
||||
int res = setvbuf(f, NULL, mode[op], sz);
|
||||
return pushresult(L, res == 0, NULL);
|
||||
}
|
||||
|
||||
|
||||
|
||||
static int io_flush (lua_State *L) {
|
||||
return pushresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);
|
||||
}
|
||||
|
||||
|
||||
static int f_flush (lua_State *L) {
|
||||
return pushresult(L, fflush(tofile(L)) == 0, NULL);
|
||||
}
|
||||
|
||||
|
||||
static const luaL_Reg iolib[] = {
|
||||
{"close", io_close},
|
||||
{"flush", io_flush},
|
||||
{"input", io_input},
|
||||
{"lines", io_lines},
|
||||
{"open", io_open},
|
||||
{"output", io_output},
|
||||
{"popen", io_popen},
|
||||
{"read", io_read},
|
||||
{"tmpfile", io_tmpfile},
|
||||
{"type", io_type},
|
||||
{"write", io_write},
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
|
||||
static const luaL_Reg flib[] = {
|
||||
{"close", io_close},
|
||||
{"flush", f_flush},
|
||||
{"lines", f_lines},
|
||||
{"read", f_read},
|
||||
{"seek", f_seek},
|
||||
{"setvbuf", f_setvbuf},
|
||||
{"write", f_write},
|
||||
{"__gc", io_gc},
|
||||
{"__tostring", io_tostring},
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
|
||||
static void createmeta (lua_State *L) {
|
||||
luaL_newmetatable(L, LUA_FILEHANDLE); /* create metatable for file handles */
|
||||
lua_pushvalue(L, -1); /* push metatable */
|
||||
lua_setfield(L, -2, "__index"); /* metatable.__index = metatable */
|
||||
luaL_register(L, NULL, flib); /* file methods */
|
||||
}
|
||||
|
||||
|
||||
static void createstdfile (lua_State *L, FILE *f, int k, const char *fname) {
|
||||
*newfile(L) = f;
|
||||
if (k > 0) {
|
||||
lua_pushvalue(L, -1);
|
||||
lua_rawseti(L, LUA_ENVIRONINDEX, k);
|
||||
}
|
||||
lua_pushvalue(L, -2); /* copy environment */
|
||||
lua_setfenv(L, -2); /* set it */
|
||||
lua_setfield(L, -3, fname);
|
||||
}
|
||||
|
||||
|
||||
static void newfenv (lua_State *L, lua_CFunction cls) {
|
||||
lua_createtable(L, 0, 1);
|
||||
lua_pushcfunction(L, cls);
|
||||
lua_setfield(L, -2, "__close");
|
||||
}
|
||||
|
||||
|
||||
LUALIB_API int luaopen_io (lua_State *L) {
|
||||
createmeta(L);
|
||||
/* create (private) environment (with fields IO_INPUT, IO_OUTPUT, __close) */
|
||||
newfenv(L, io_fclose);
|
||||
lua_replace(L, LUA_ENVIRONINDEX);
|
||||
/* open library */
|
||||
luaL_register(L, LUA_IOLIBNAME, iolib);
|
||||
/* create (and set) default files */
|
||||
newfenv(L, io_noclose); /* close function for default files */
|
||||
createstdfile(L, stdin, IO_INPUT, "stdin");
|
||||
createstdfile(L, stdout, IO_OUTPUT, "stdout");
|
||||
createstdfile(L, stderr, 0, "stderr");
|
||||
lua_pop(L, 1); /* pop environment for default files */
|
||||
lua_getfield(L, -1, "popen");
|
||||
newfenv(L, io_pclose); /* create environment for 'popen' */
|
||||
lua_setfenv(L, -2); /* set fenv for 'popen' */
|
||||
lua_pop(L, 1); /* pop 'popen' */
|
||||
return 1;
|
||||
}
|
||||
|
463
src/lua/llex.c
463
src/lua/llex.c
|
@ -1,463 +0,0 @@
|
|||
/*
|
||||
** $Id: llex.c,v 2.20.1.2 2009/11/23 14:58:22 roberto Exp $
|
||||
** Lexical Analyzer
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <ctype.h>
|
||||
#include <locale.h>
|
||||
#include <string.h>
|
||||
|
||||
#define llex_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "ldo.h"
|
||||
#include "llex.h"
|
||||
#include "lobject.h"
|
||||
#include "lparser.h"
|
||||
#include "lstate.h"
|
||||
#include "lstring.h"
|
||||
#include "ltable.h"
|
||||
#include "lzio.h"
|
||||
|
||||
|
||||
|
||||
#define next(ls) (ls->current = zgetc(ls->z))
|
||||
|
||||
|
||||
|
||||
|
||||
#define currIsNewline(ls) (ls->current == '\n' || ls->current == '\r')
|
||||
|
||||
|
||||
/* ORDER RESERVED */
|
||||
const char *const luaX_tokens [] = {
|
||||
"and", "break", "do", "else", "elseif",
|
||||
"end", "false", "for", "function", "if",
|
||||
"in", "local", "nil", "not", "or", "repeat",
|
||||
"return", "then", "true", "until", "while",
|
||||
"..", "...", "==", ">=", "<=", "~=",
|
||||
"<number>", "<name>", "<string>", "<eof>",
|
||||
NULL
|
||||
};
|
||||
|
||||
|
||||
#define save_and_next(ls) (save(ls, ls->current), next(ls))
|
||||
|
||||
|
||||
static void save (LexState *ls, int c) {
|
||||
Mbuffer *b = ls->buff;
|
||||
if (b->n + 1 > b->buffsize) {
|
||||
size_t newsize;
|
||||
if (b->buffsize >= MAX_SIZET/2)
|
||||
luaX_lexerror(ls, "lexical element too long", 0);
|
||||
newsize = b->buffsize * 2;
|
||||
luaZ_resizebuffer(ls->L, b, newsize);
|
||||
}
|
||||
b->buffer[b->n++] = cast(char, c);
|
||||
}
|
||||
|
||||
|
||||
void luaX_init (lua_State *L) {
|
||||
int i;
|
||||
for (i=0; i<NUM_RESERVED; i++) {
|
||||
TString *ts = luaS_new(L, luaX_tokens[i]);
|
||||
luaS_fix(ts); /* reserved words are never collected */
|
||||
lua_assert(strlen(luaX_tokens[i])+1 <= TOKEN_LEN);
|
||||
ts->tsv.reserved = cast_byte(i+1); /* reserved word */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#define MAXSRC 80
|
||||
|
||||
|
||||
const char *luaX_token2str (LexState *ls, int token) {
|
||||
if (token < FIRST_RESERVED) {
|
||||
lua_assert(token == cast(unsigned char, token));
|
||||
return (iscntrl(token)) ? luaO_pushfstring(ls->L, "char(%d)", token) :
|
||||
luaO_pushfstring(ls->L, "%c", token);
|
||||
}
|
||||
else
|
||||
return luaX_tokens[token-FIRST_RESERVED];
|
||||
}
|
||||
|
||||
|
||||
static const char *txtToken (LexState *ls, int token) {
|
||||
switch (token) {
|
||||
case TK_NAME:
|
||||
case TK_STRING:
|
||||
case TK_NUMBER:
|
||||
save(ls, '\0');
|
||||
return luaZ_buffer(ls->buff);
|
||||
default:
|
||||
return luaX_token2str(ls, token);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaX_lexerror (LexState *ls, const char *msg, int token) {
|
||||
char buff[MAXSRC];
|
||||
luaO_chunkid(buff, getstr(ls->source), MAXSRC);
|
||||
msg = luaO_pushfstring(ls->L, "%s:%d: %s", buff, ls->linenumber, msg);
|
||||
if (token)
|
||||
luaO_pushfstring(ls->L, "%s near " LUA_QS, msg, txtToken(ls, token));
|
||||
luaD_throw(ls->L, LUA_ERRSYNTAX);
|
||||
}
|
||||
|
||||
|
||||
void luaX_syntaxerror (LexState *ls, const char *msg) {
|
||||
luaX_lexerror(ls, msg, ls->t.token);
|
||||
}
|
||||
|
||||
|
||||
TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
|
||||
lua_State *L = ls->L;
|
||||
TString *ts = luaS_newlstr(L, str, l);
|
||||
TValue *o = luaH_setstr(L, ls->fs->h, ts); /* entry for `str' */
|
||||
if (ttisnil(o)) {
|
||||
setbvalue(o, 1); /* make sure `str' will not be collected */
|
||||
luaC_checkGC(L);
|
||||
}
|
||||
return ts;
|
||||
}
|
||||
|
||||
|
||||
static void inclinenumber (LexState *ls) {
|
||||
int old = ls->current;
|
||||
lua_assert(currIsNewline(ls));
|
||||
next(ls); /* skip `\n' or `\r' */
|
||||
if (currIsNewline(ls) && ls->current != old)
|
||||
next(ls); /* skip `\n\r' or `\r\n' */
|
||||
if (++ls->linenumber >= MAX_INT)
|
||||
luaX_syntaxerror(ls, "chunk has too many lines");
|
||||
}
|
||||
|
||||
|
||||
void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source) {
|
||||
ls->decpoint = '.';
|
||||
ls->L = L;
|
||||
ls->lookahead.token = TK_EOS; /* no look-ahead token */
|
||||
ls->z = z;
|
||||
ls->fs = NULL;
|
||||
ls->linenumber = 1;
|
||||
ls->lastline = 1;
|
||||
ls->source = source;
|
||||
luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER); /* initialize buffer */
|
||||
next(ls); /* read first char */
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** =======================================================
|
||||
** LEXICAL ANALYZER
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
|
||||
|
||||
static int check_next (LexState *ls, const char *set) {
|
||||
if (!strchr(set, ls->current))
|
||||
return 0;
|
||||
save_and_next(ls);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static void buffreplace (LexState *ls, char from, char to) {
|
||||
size_t n = luaZ_bufflen(ls->buff);
|
||||
char *p = luaZ_buffer(ls->buff);
|
||||
while (n--)
|
||||
if (p[n] == from) p[n] = to;
|
||||
}
|
||||
|
||||
|
||||
static void trydecpoint (LexState *ls, SemInfo *seminfo) {
|
||||
/* format error: try to update decimal point separator */
|
||||
struct lconv *cv = localeconv();
|
||||
char old = ls->decpoint;
|
||||
ls->decpoint = (cv ? cv->decimal_point[0] : '.');
|
||||
buffreplace(ls, old, ls->decpoint); /* try updated decimal separator */
|
||||
if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r)) {
|
||||
/* format error with correct decimal point: no more options */
|
||||
buffreplace(ls, ls->decpoint, '.'); /* undo change (for error message) */
|
||||
luaX_lexerror(ls, "malformed number", TK_NUMBER);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* LUA_NUMBER */
|
||||
static void read_numeral (LexState *ls, SemInfo *seminfo) {
|
||||
lua_assert(isdigit(ls->current));
|
||||
do {
|
||||
save_and_next(ls);
|
||||
} while (isdigit(ls->current) || ls->current == '.');
|
||||
if (check_next(ls, "Ee")) /* `E'? */
|
||||
check_next(ls, "+-"); /* optional exponent sign */
|
||||
while (isalnum(ls->current) || ls->current == '_')
|
||||
save_and_next(ls);
|
||||
save(ls, '\0');
|
||||
buffreplace(ls, '.', ls->decpoint); /* follow locale for decimal point */
|
||||
if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r)) /* format error? */
|
||||
trydecpoint(ls, seminfo); /* try to update decimal point separator */
|
||||
}
|
||||
|
||||
|
||||
static int skip_sep (LexState *ls) {
|
||||
int count = 0;
|
||||
int s = ls->current;
|
||||
lua_assert(s == '[' || s == ']');
|
||||
save_and_next(ls);
|
||||
while (ls->current == '=') {
|
||||
save_and_next(ls);
|
||||
count++;
|
||||
}
|
||||
return (ls->current == s) ? count : (-count) - 1;
|
||||
}
|
||||
|
||||
|
||||
static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) {
|
||||
int cont = 0;
|
||||
(void)(cont); /* avoid warnings when `cont' is not used */
|
||||
save_and_next(ls); /* skip 2nd `[' */
|
||||
if (currIsNewline(ls)) /* string starts with a newline? */
|
||||
inclinenumber(ls); /* skip it */
|
||||
for (;;) {
|
||||
switch (ls->current) {
|
||||
case EOZ:
|
||||
luaX_lexerror(ls, (seminfo) ? "unfinished long string" :
|
||||
"unfinished long comment", TK_EOS);
|
||||
break; /* to avoid warnings */
|
||||
#if defined(LUA_COMPAT_LSTR)
|
||||
case '[': {
|
||||
if (skip_sep(ls) == sep) {
|
||||
save_and_next(ls); /* skip 2nd `[' */
|
||||
cont++;
|
||||
#if LUA_COMPAT_LSTR == 1
|
||||
if (sep == 0)
|
||||
luaX_lexerror(ls, "nesting of [[...]] is deprecated", '[');
|
||||
#endif
|
||||
}
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
case ']': {
|
||||
if (skip_sep(ls) == sep) {
|
||||
save_and_next(ls); /* skip 2nd `]' */
|
||||
#if defined(LUA_COMPAT_LSTR) && LUA_COMPAT_LSTR == 2
|
||||
cont--;
|
||||
if (sep == 0 && cont >= 0) break;
|
||||
#endif
|
||||
goto endloop;
|
||||
}
|
||||
break;
|
||||
}
|
||||
case '\n':
|
||||
case '\r': {
|
||||
save(ls, '\n');
|
||||
inclinenumber(ls);
|
||||
if (!seminfo) luaZ_resetbuffer(ls->buff); /* avoid wasting space */
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
if (seminfo) save_and_next(ls);
|
||||
else next(ls);
|
||||
}
|
||||
}
|
||||
} endloop:
|
||||
if (seminfo)
|
||||
seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + (2 + sep),
|
||||
luaZ_bufflen(ls->buff) - 2*(2 + sep));
|
||||
}
|
||||
|
||||
|
||||
static void read_string (LexState *ls, int del, SemInfo *seminfo) {
|
||||
save_and_next(ls);
|
||||
while (ls->current != del) {
|
||||
switch (ls->current) {
|
||||
case EOZ:
|
||||
luaX_lexerror(ls, "unfinished string", TK_EOS);
|
||||
continue; /* to avoid warnings */
|
||||
case '\n':
|
||||
case '\r':
|
||||
luaX_lexerror(ls, "unfinished string", TK_STRING);
|
||||
continue; /* to avoid warnings */
|
||||
case '\\': {
|
||||
int c;
|
||||
next(ls); /* do not save the `\' */
|
||||
switch (ls->current) {
|
||||
case 'a': c = '\a'; break;
|
||||
case 'b': c = '\b'; break;
|
||||
case 'f': c = '\f'; break;
|
||||
case 'n': c = '\n'; break;
|
||||
case 'r': c = '\r'; break;
|
||||
case 't': c = '\t'; break;
|
||||
case 'v': c = '\v'; break;
|
||||
case '\n': /* go through */
|
||||
case '\r': save(ls, '\n'); inclinenumber(ls); continue;
|
||||
case EOZ: continue; /* will raise an error next loop */
|
||||
default: {
|
||||
if (!isdigit(ls->current))
|
||||
save_and_next(ls); /* handles \\, \", \', and \? */
|
||||
else { /* \xxx */
|
||||
int i = 0;
|
||||
c = 0;
|
||||
do {
|
||||
c = 10*c + (ls->current-'0');
|
||||
next(ls);
|
||||
} while (++i<3 && isdigit(ls->current));
|
||||
if (c > UCHAR_MAX)
|
||||
luaX_lexerror(ls, "escape sequence too large", TK_STRING);
|
||||
save(ls, c);
|
||||
}
|
||||
continue;
|
||||
}
|
||||
}
|
||||
save(ls, c);
|
||||
next(ls);
|
||||
continue;
|
||||
}
|
||||
default:
|
||||
save_and_next(ls);
|
||||
}
|
||||
}
|
||||
save_and_next(ls); /* skip delimiter */
|
||||
seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + 1,
|
||||
luaZ_bufflen(ls->buff) - 2);
|
||||
}
|
||||
|
||||
|
||||
static int llex (LexState *ls, SemInfo *seminfo) {
|
||||
luaZ_resetbuffer(ls->buff);
|
||||
for (;;) {
|
||||
switch (ls->current) {
|
||||
case '\n':
|
||||
case '\r': {
|
||||
inclinenumber(ls);
|
||||
continue;
|
||||
}
|
||||
case '-': {
|
||||
next(ls);
|
||||
if (ls->current != '-') return '-';
|
||||
/* else is a comment */
|
||||
next(ls);
|
||||
if (ls->current == '[') {
|
||||
int sep = skip_sep(ls);
|
||||
luaZ_resetbuffer(ls->buff); /* `skip_sep' may dirty the buffer */
|
||||
if (sep >= 0) {
|
||||
read_long_string(ls, NULL, sep); /* long comment */
|
||||
luaZ_resetbuffer(ls->buff);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
/* else short comment */
|
||||
while (!currIsNewline(ls) && ls->current != EOZ)
|
||||
next(ls);
|
||||
continue;
|
||||
}
|
||||
case '[': {
|
||||
int sep = skip_sep(ls);
|
||||
if (sep >= 0) {
|
||||
read_long_string(ls, seminfo, sep);
|
||||
return TK_STRING;
|
||||
}
|
||||
else if (sep == -1) return '[';
|
||||
else luaX_lexerror(ls, "invalid long string delimiter", TK_STRING);
|
||||
}
|
||||
case '=': {
|
||||
next(ls);
|
||||
if (ls->current != '=') return '=';
|
||||
else { next(ls); return TK_EQ; }
|
||||
}
|
||||
case '<': {
|
||||
next(ls);
|
||||
if (ls->current != '=') return '<';
|
||||
else { next(ls); return TK_LE; }
|
||||
}
|
||||
case '>': {
|
||||
next(ls);
|
||||
if (ls->current != '=') return '>';
|
||||
else { next(ls); return TK_GE; }
|
||||
}
|
||||
case '~': {
|
||||
next(ls);
|
||||
if (ls->current != '=') return '~';
|
||||
else { next(ls); return TK_NE; }
|
||||
}
|
||||
case '"':
|
||||
case '\'': {
|
||||
read_string(ls, ls->current, seminfo);
|
||||
return TK_STRING;
|
||||
}
|
||||
case '.': {
|
||||
save_and_next(ls);
|
||||
if (check_next(ls, ".")) {
|
||||
if (check_next(ls, "."))
|
||||
return TK_DOTS; /* ... */
|
||||
else return TK_CONCAT; /* .. */
|
||||
}
|
||||
else if (!isdigit(ls->current)) return '.';
|
||||
else {
|
||||
read_numeral(ls, seminfo);
|
||||
return TK_NUMBER;
|
||||
}
|
||||
}
|
||||
case EOZ: {
|
||||
return TK_EOS;
|
||||
}
|
||||
default: {
|
||||
if (isspace(ls->current)) {
|
||||
lua_assert(!currIsNewline(ls));
|
||||
next(ls);
|
||||
continue;
|
||||
}
|
||||
else if (isdigit(ls->current)) {
|
||||
read_numeral(ls, seminfo);
|
||||
return TK_NUMBER;
|
||||
}
|
||||
else if (isalpha(ls->current) || ls->current == '_') {
|
||||
/* identifier or reserved word */
|
||||
TString *ts;
|
||||
do {
|
||||
save_and_next(ls);
|
||||
} while (isalnum(ls->current) || ls->current == '_');
|
||||
ts = luaX_newstring(ls, luaZ_buffer(ls->buff),
|
||||
luaZ_bufflen(ls->buff));
|
||||
if (ts->tsv.reserved > 0) /* reserved word? */
|
||||
return ts->tsv.reserved - 1 + FIRST_RESERVED;
|
||||
else {
|
||||
seminfo->ts = ts;
|
||||
return TK_NAME;
|
||||
}
|
||||
}
|
||||
else {
|
||||
int c = ls->current;
|
||||
next(ls);
|
||||
return c; /* single-char tokens (+ - / ...) */
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void luaX_next (LexState *ls) {
|
||||
ls->lastline = ls->linenumber;
|
||||
if (ls->lookahead.token != TK_EOS) { /* is there a look-ahead token? */
|
||||
ls->t = ls->lookahead; /* use this one */
|
||||
ls->lookahead.token = TK_EOS; /* and discharge it */
|
||||
}
|
||||
else
|
||||
ls->t.token = llex(ls, &ls->t.seminfo); /* read next token */
|
||||
}
|
||||
|
||||
|
||||
void luaX_lookahead (LexState *ls) {
|
||||
lua_assert(ls->lookahead.token == TK_EOS);
|
||||
ls->lookahead.token = llex(ls, &ls->lookahead.seminfo);
|
||||
}
|
||||
|
|
@ -1,81 +0,0 @@
|
|||
/*
|
||||
** $Id: llex.h,v 1.58.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Lexical Analyzer
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef llex_h
|
||||
#define llex_h
|
||||
|
||||
#include "lobject.h"
|
||||
#include "lzio.h"
|
||||
|
||||
|
||||
#define FIRST_RESERVED 257
|
||||
|
||||
/* maximum length of a reserved word */
|
||||
#define TOKEN_LEN (sizeof("function")/sizeof(char))
|
||||
|
||||
|
||||
/*
|
||||
* WARNING: if you change the order of this enumeration,
|
||||
* grep "ORDER RESERVED"
|
||||
*/
|
||||
enum RESERVED {
|
||||
/* terminal symbols denoted by reserved words */
|
||||
TK_AND = FIRST_RESERVED, TK_BREAK,
|
||||
TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
|
||||
TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
|
||||
TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
|
||||
/* other terminal symbols */
|
||||
TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_NUMBER,
|
||||
TK_NAME, TK_STRING, TK_EOS
|
||||
};
|
||||
|
||||
/* number of reserved words */
|
||||
#define NUM_RESERVED (cast(int, TK_WHILE-FIRST_RESERVED+1))
|
||||
|
||||
|
||||
/* array with token `names' */
|
||||
LUAI_DATA const char *const luaX_tokens [];
|
||||
|
||||
|
||||
typedef union {
|
||||
lua_Number r;
|
||||
TString *ts;
|
||||
} SemInfo; /* semantics information */
|
||||
|
||||
|
||||
typedef struct Token {
|
||||
int token;
|
||||
SemInfo seminfo;
|
||||
} Token;
|
||||
|
||||
|
||||
typedef struct LexState {
|
||||
int current; /* current character (charint) */
|
||||
int linenumber; /* input line counter */
|
||||
int lastline; /* line of last token `consumed' */
|
||||
Token t; /* current token */
|
||||
Token lookahead; /* look ahead token */
|
||||
struct FuncState *fs; /* `FuncState' is private to the parser */
|
||||
struct lua_State *L;
|
||||
ZIO *z; /* input stream */
|
||||
Mbuffer *buff; /* buffer for tokens */
|
||||
TString *source; /* current source name */
|
||||
char decpoint; /* locale decimal point */
|
||||
} LexState;
|
||||
|
||||
|
||||
LUAI_FUNC void luaX_init (lua_State *L);
|
||||
LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z,
|
||||
TString *source);
|
||||
LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);
|
||||
LUAI_FUNC void luaX_next (LexState *ls);
|
||||
LUAI_FUNC void luaX_lookahead (LexState *ls);
|
||||
LUAI_FUNC void luaX_lexerror (LexState *ls, const char *msg, int token);
|
||||
LUAI_FUNC void luaX_syntaxerror (LexState *ls, const char *s);
|
||||
LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);
|
||||
|
||||
|
||||
#endif
|
|
@ -1,128 +0,0 @@
|
|||
/*
|
||||
** $Id: llimits.h,v 1.69.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Limits, basic types, and some other `installation-dependent' definitions
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef llimits_h
|
||||
#define llimits_h
|
||||
|
||||
|
||||
#include <limits.h>
|
||||
#include <stddef.h>
|
||||
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
|
||||
typedef LUAI_UINT32 lu_int32;
|
||||
|
||||
typedef LUAI_UMEM lu_mem;
|
||||
|
||||
typedef LUAI_MEM l_mem;
|
||||
|
||||
|
||||
|
||||
/* chars used as small naturals (so that `char' is reserved for characters) */
|
||||
typedef unsigned char lu_byte;
|
||||
|
||||
|
||||
#define MAX_SIZET ((size_t)(~(size_t)0)-2)
|
||||
|
||||
#define MAX_LUMEM ((lu_mem)(~(lu_mem)0)-2)
|
||||
|
||||
|
||||
#define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */
|
||||
|
||||
/*
|
||||
** conversion of pointer to integer
|
||||
** this is for hashing only; there is no problem if the integer
|
||||
** cannot hold the whole pointer value
|
||||
*/
|
||||
#define IntPoint(p) ((unsigned int)(lu_mem)(p))
|
||||
|
||||
|
||||
|
||||
/* type to ensure maximum alignment */
|
||||
typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
|
||||
|
||||
|
||||
/* result of a `usual argument conversion' over lua_Number */
|
||||
typedef LUAI_UACNUMBER l_uacNumber;
|
||||
|
||||
|
||||
/* internal assertions for in-house debugging */
|
||||
#ifdef lua_assert
|
||||
|
||||
#define check_exp(c,e) (lua_assert(c), (e))
|
||||
#define api_check(l,e) lua_assert(e)
|
||||
|
||||
#else
|
||||
|
||||
#define lua_assert(c) ((void)0)
|
||||
#define check_exp(c,e) (e)
|
||||
#define api_check luai_apicheck
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
#ifndef UNUSED
|
||||
#define UNUSED(x) ((void)(x)) /* to avoid warnings */
|
||||
#endif
|
||||
|
||||
|
||||
#ifndef cast
|
||||
#define cast(t, exp) ((t)(exp))
|
||||
#endif
|
||||
|
||||
#define cast_byte(i) cast(lu_byte, (i))
|
||||
#define cast_num(i) cast(lua_Number, (i))
|
||||
#define cast_int(i) cast(int, (i))
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** type for virtual-machine instructions
|
||||
** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
|
||||
*/
|
||||
typedef lu_int32 Instruction;
|
||||
|
||||
|
||||
|
||||
/* maximum stack for a Lua function */
|
||||
#define MAXSTACK 250
|
||||
|
||||
|
||||
|
||||
/* minimum size for the string table (must be power of 2) */
|
||||
#ifndef MINSTRTABSIZE
|
||||
#define MINSTRTABSIZE 32
|
||||
#endif
|
||||
|
||||
|
||||
/* minimum size for string buffer */
|
||||
#ifndef LUA_MINBUFFER
|
||||
#define LUA_MINBUFFER 32
|
||||
#endif
|
||||
|
||||
|
||||
#ifndef lua_lock
|
||||
#define lua_lock(L) ((void) 0)
|
||||
#define lua_unlock(L) ((void) 0)
|
||||
#endif
|
||||
|
||||
#ifndef luai_threadyield
|
||||
#define luai_threadyield(L) {lua_unlock(L); lua_lock(L);}
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
** macro to control inclusion of some hard tests on stack reallocation
|
||||
*/
|
||||
#ifndef HARDSTACKTESTS
|
||||
#define condhardstacktests(x) ((void)0)
|
||||
#else
|
||||
#define condhardstacktests(x) x
|
||||
#endif
|
||||
|
||||
#endif
|
|
@ -1,263 +0,0 @@
|
|||
/*
|
||||
** $Id: lmathlib.c,v 1.67.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Standard mathematical library
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <math.h>
|
||||
|
||||
#define lmathlib_c
|
||||
#define LUA_LIB
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lauxlib.h"
|
||||
#include "lualib.h"
|
||||
|
||||
|
||||
#undef PI
|
||||
#define PI (3.14159265358979323846)
|
||||
#define RADIANS_PER_DEGREE (PI/180.0)
|
||||
|
||||
|
||||
|
||||
static int math_abs (lua_State *L) {
|
||||
lua_pushnumber(L, fabs(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_sin (lua_State *L) {
|
||||
lua_pushnumber(L, sin(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_sinh (lua_State *L) {
|
||||
lua_pushnumber(L, sinh(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_cos (lua_State *L) {
|
||||
lua_pushnumber(L, cos(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_cosh (lua_State *L) {
|
||||
lua_pushnumber(L, cosh(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_tan (lua_State *L) {
|
||||
lua_pushnumber(L, tan(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_tanh (lua_State *L) {
|
||||
lua_pushnumber(L, tanh(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_asin (lua_State *L) {
|
||||
lua_pushnumber(L, asin(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_acos (lua_State *L) {
|
||||
lua_pushnumber(L, acos(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_atan (lua_State *L) {
|
||||
lua_pushnumber(L, atan(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_atan2 (lua_State *L) {
|
||||
lua_pushnumber(L, atan2(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_ceil (lua_State *L) {
|
||||
lua_pushnumber(L, ceil(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_floor (lua_State *L) {
|
||||
lua_pushnumber(L, floor(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_fmod (lua_State *L) {
|
||||
lua_pushnumber(L, fmod(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_modf (lua_State *L) {
|
||||
double ip;
|
||||
double fp = modf(luaL_checknumber(L, 1), &ip);
|
||||
lua_pushnumber(L, ip);
|
||||
lua_pushnumber(L, fp);
|
||||
return 2;
|
||||
}
|
||||
|
||||
static int math_sqrt (lua_State *L) {
|
||||
lua_pushnumber(L, sqrt(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_pow (lua_State *L) {
|
||||
lua_pushnumber(L, pow(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_log (lua_State *L) {
|
||||
lua_pushnumber(L, log(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_log10 (lua_State *L) {
|
||||
lua_pushnumber(L, log10(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_exp (lua_State *L) {
|
||||
lua_pushnumber(L, exp(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_deg (lua_State *L) {
|
||||
lua_pushnumber(L, luaL_checknumber(L, 1)/RADIANS_PER_DEGREE);
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_rad (lua_State *L) {
|
||||
lua_pushnumber(L, luaL_checknumber(L, 1)*RADIANS_PER_DEGREE);
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_frexp (lua_State *L) {
|
||||
int e;
|
||||
lua_pushnumber(L, frexp(luaL_checknumber(L, 1), &e));
|
||||
lua_pushinteger(L, e);
|
||||
return 2;
|
||||
}
|
||||
|
||||
static int math_ldexp (lua_State *L) {
|
||||
lua_pushnumber(L, ldexp(luaL_checknumber(L, 1), luaL_checkint(L, 2)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
|
||||
static int math_min (lua_State *L) {
|
||||
int n = lua_gettop(L); /* number of arguments */
|
||||
lua_Number dmin = luaL_checknumber(L, 1);
|
||||
int i;
|
||||
for (i=2; i<=n; i++) {
|
||||
lua_Number d = luaL_checknumber(L, i);
|
||||
if (d < dmin)
|
||||
dmin = d;
|
||||
}
|
||||
lua_pushnumber(L, dmin);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int math_max (lua_State *L) {
|
||||
int n = lua_gettop(L); /* number of arguments */
|
||||
lua_Number dmax = luaL_checknumber(L, 1);
|
||||
int i;
|
||||
for (i=2; i<=n; i++) {
|
||||
lua_Number d = luaL_checknumber(L, i);
|
||||
if (d > dmax)
|
||||
dmax = d;
|
||||
}
|
||||
lua_pushnumber(L, dmax);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int math_random (lua_State *L) {
|
||||
/* the `%' avoids the (rare) case of r==1, and is needed also because on
|
||||
some systems (SunOS!) `rand()' may return a value larger than RAND_MAX */
|
||||
lua_Number r = (lua_Number)(rand()%RAND_MAX) / (lua_Number)RAND_MAX;
|
||||
switch (lua_gettop(L)) { /* check number of arguments */
|
||||
case 0: { /* no arguments */
|
||||
lua_pushnumber(L, r); /* Number between 0 and 1 */
|
||||
break;
|
||||
}
|
||||
case 1: { /* only upper limit */
|
||||
int u = luaL_checkint(L, 1);
|
||||
luaL_argcheck(L, 1<=u, 1, "interval is empty");
|
||||
lua_pushnumber(L, floor(r*u)+1); /* int between 1 and `u' */
|
||||
break;
|
||||
}
|
||||
case 2: { /* lower and upper limits */
|
||||
int l = luaL_checkint(L, 1);
|
||||
int u = luaL_checkint(L, 2);
|
||||
luaL_argcheck(L, l<=u, 2, "interval is empty");
|
||||
lua_pushnumber(L, floor(r*(u-l+1))+l); /* int between `l' and `u' */
|
||||
break;
|
||||
}
|
||||
default: return luaL_error(L, "wrong number of arguments");
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int math_randomseed (lua_State *L) {
|
||||
srand(luaL_checkint(L, 1));
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static const luaL_Reg mathlib[] = {
|
||||
{"abs", math_abs},
|
||||
{"acos", math_acos},
|
||||
{"asin", math_asin},
|
||||
{"atan2", math_atan2},
|
||||
{"atan", math_atan},
|
||||
{"ceil", math_ceil},
|
||||
{"cosh", math_cosh},
|
||||
{"cos", math_cos},
|
||||
{"deg", math_deg},
|
||||
{"exp", math_exp},
|
||||
{"floor", math_floor},
|
||||
{"fmod", math_fmod},
|
||||
{"frexp", math_frexp},
|
||||
{"ldexp", math_ldexp},
|
||||
{"log10", math_log10},
|
||||
{"log", math_log},
|
||||
{"max", math_max},
|
||||
{"min", math_min},
|
||||
{"modf", math_modf},
|
||||
{"pow", math_pow},
|
||||
{"rad", math_rad},
|
||||
{"random", math_random},
|
||||
{"randomseed", math_randomseed},
|
||||
{"sinh", math_sinh},
|
||||
{"sin", math_sin},
|
||||
{"sqrt", math_sqrt},
|
||||
{"tanh", math_tanh},
|
||||
{"tan", math_tan},
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
** Open math library
|
||||
*/
|
||||
LUALIB_API int luaopen_math (lua_State *L) {
|
||||
luaL_register(L, LUA_MATHLIBNAME, mathlib);
|
||||
lua_pushnumber(L, PI);
|
||||
lua_setfield(L, -2, "pi");
|
||||
lua_pushnumber(L, HUGE_VAL);
|
||||
lua_setfield(L, -2, "huge");
|
||||
#if defined(LUA_COMPAT_MOD)
|
||||
lua_getfield(L, -1, "fmod");
|
||||
lua_setfield(L, -2, "mod");
|
||||
#endif
|
||||
return 1;
|
||||
}
|
||||
|
|
@ -1,86 +0,0 @@
|
|||
/*
|
||||
** $Id: lmem.c,v 1.70.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Interface to Memory Manager
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <stddef.h>
|
||||
|
||||
#define lmem_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "ldebug.h"
|
||||
#include "ldo.h"
|
||||
#include "lmem.h"
|
||||
#include "lobject.h"
|
||||
#include "lstate.h"
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** About the realloc function:
|
||||
** void * frealloc (void *ud, void *ptr, size_t osize, size_t nsize);
|
||||
** (`osize' is the old size, `nsize' is the new size)
|
||||
**
|
||||
** Lua ensures that (ptr == NULL) iff (osize == 0).
|
||||
**
|
||||
** * frealloc(ud, NULL, 0, x) creates a new block of size `x'
|
||||
**
|
||||
** * frealloc(ud, p, x, 0) frees the block `p'
|
||||
** (in this specific case, frealloc must return NULL).
|
||||
** particularly, frealloc(ud, NULL, 0, 0) does nothing
|
||||
** (which is equivalent to free(NULL) in ANSI C)
|
||||
**
|
||||
** frealloc returns NULL if it cannot create or reallocate the area
|
||||
** (any reallocation to an equal or smaller size cannot fail!)
|
||||
*/
|
||||
|
||||
|
||||
|
||||
#define MINSIZEARRAY 4
|
||||
|
||||
|
||||
void *luaM_growaux_ (lua_State *L, void *block, int *size, size_t size_elems,
|
||||
int limit, const char *errormsg) {
|
||||
void *newblock;
|
||||
int newsize;
|
||||
if (*size >= limit/2) { /* cannot double it? */
|
||||
if (*size >= limit) /* cannot grow even a little? */
|
||||
luaG_runerror(L, errormsg);
|
||||
newsize = limit; /* still have at least one free place */
|
||||
}
|
||||
else {
|
||||
newsize = (*size)*2;
|
||||
if (newsize < MINSIZEARRAY)
|
||||
newsize = MINSIZEARRAY; /* minimum size */
|
||||
}
|
||||
newblock = luaM_reallocv(L, block, *size, newsize, size_elems);
|
||||
*size = newsize; /* update only when everything else is OK */
|
||||
return newblock;
|
||||
}
|
||||
|
||||
|
||||
void *luaM_toobig (lua_State *L) {
|
||||
luaG_runerror(L, "memory allocation error: block too big");
|
||||
return NULL; /* to avoid warnings */
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** generic allocation routine.
|
||||
*/
|
||||
void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
|
||||
global_State *g = G(L);
|
||||
lua_assert((osize == 0) == (block == NULL));
|
||||
block = (*g->frealloc)(g->ud, block, osize, nsize);
|
||||
if (block == NULL && nsize > 0)
|
||||
luaD_throw(L, LUA_ERRMEM);
|
||||
lua_assert((nsize == 0) == (block == NULL));
|
||||
g->totalbytes = (g->totalbytes - osize) + nsize;
|
||||
return block;
|
||||
}
|
||||
|
|
@ -1,49 +0,0 @@
|
|||
/*
|
||||
** $Id: lmem.h,v 1.31.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Interface to Memory Manager
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef lmem_h
|
||||
#define lmem_h
|
||||
|
||||
|
||||
#include <stddef.h>
|
||||
|
||||
#include "llimits.h"
|
||||
#include "lua.h"
|
||||
|
||||
#define MEMERRMSG "not enough memory"
|
||||
|
||||
|
||||
#define luaM_reallocv(L,b,on,n,e) \
|
||||
((cast(size_t, (n)+1) <= MAX_SIZET/(e)) ? /* +1 to avoid warnings */ \
|
||||
luaM_realloc_(L, (b), (on)*(e), (n)*(e)) : \
|
||||
luaM_toobig(L))
|
||||
|
||||
#define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0)
|
||||
#define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0)
|
||||
#define luaM_freearray(L, b, n, t) luaM_reallocv(L, (b), n, 0, sizeof(t))
|
||||
|
||||
#define luaM_malloc(L,t) luaM_realloc_(L, NULL, 0, (t))
|
||||
#define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t)))
|
||||
#define luaM_newvector(L,n,t) \
|
||||
cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t)))
|
||||
|
||||
#define luaM_growvector(L,v,nelems,size,t,limit,e) \
|
||||
if ((nelems)+1 > (size)) \
|
||||
((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e)))
|
||||
|
||||
#define luaM_reallocvector(L, v,oldn,n,t) \
|
||||
((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))
|
||||
|
||||
|
||||
LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
|
||||
size_t size);
|
||||
LUAI_FUNC void *luaM_toobig (lua_State *L);
|
||||
LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size,
|
||||
size_t size_elem, int limit,
|
||||
const char *errormsg);
|
||||
|
||||
#endif
|
||||
|
|
@ -1,666 +0,0 @@
|
|||
/*
|
||||
** $Id: loadlib.c,v 1.52.1.4 2009/09/09 13:17:16 roberto Exp $
|
||||
** Dynamic library loader for Lua
|
||||
** See Copyright Notice in lua.h
|
||||
**
|
||||
** This module contains an implementation of loadlib for Unix systems
|
||||
** that have dlfcn, an implementation for Darwin (Mac OS X), an
|
||||
** implementation for Windows, and a stub for other systems.
|
||||
*/
|
||||
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
|
||||
#define loadlib_c
|
||||
#define LUA_LIB
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lauxlib.h"
|
||||
#include "lualib.h"
|
||||
|
||||
|
||||
/* prefix for open functions in C libraries */
|
||||
#define LUA_POF "luaopen_"
|
||||
|
||||
/* separator for open functions in C libraries */
|
||||
#define LUA_OFSEP "_"
|
||||
|
||||
|
||||
#define LIBPREFIX "LOADLIB: "
|
||||
|
||||
#define POF LUA_POF
|
||||
#define LIB_FAIL "open"
|
||||
|
||||
|
||||
/* error codes for ll_loadfunc */
|
||||
#define ERRLIB 1
|
||||
#define ERRFUNC 2
|
||||
|
||||
#define setprogdir(L) ((void)0)
|
||||
|
||||
|
||||
static void ll_unloadlib (void *lib);
|
||||
static void *ll_load (lua_State *L, const char *path);
|
||||
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym);
|
||||
|
||||
|
||||
|
||||
#if defined(LUA_DL_DLOPEN)
|
||||
/*
|
||||
** {========================================================================
|
||||
** This is an implementation of loadlib based on the dlfcn interface.
|
||||
** The dlfcn interface is available in Linux, SunOS, Solaris, IRIX, FreeBSD,
|
||||
** NetBSD, AIX 4.2, HPUX 11, and probably most other Unix flavors, at least
|
||||
** as an emulation layer on top of native functions.
|
||||
** =========================================================================
|
||||
*/
|
||||
|
||||
#include <dlfcn.h>
|
||||
|
||||
static void ll_unloadlib (void *lib) {
|
||||
dlclose(lib);
|
||||
}
|
||||
|
||||
|
||||
static void *ll_load (lua_State *L, const char *path) {
|
||||
void *lib = dlopen(path, RTLD_NOW);
|
||||
if (lib == NULL) lua_pushstring(L, dlerror());
|
||||
return lib;
|
||||
}
|
||||
|
||||
|
||||
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
|
||||
lua_CFunction f = (lua_CFunction)dlsym(lib, sym);
|
||||
if (f == NULL) lua_pushstring(L, dlerror());
|
||||
return f;
|
||||
}
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
|
||||
#elif defined(LUA_DL_DLL)
|
||||
/*
|
||||
** {======================================================================
|
||||
** This is an implementation of loadlib for Windows using native functions.
|
||||
** =======================================================================
|
||||
*/
|
||||
|
||||
#include <windows.h>
|
||||
|
||||
|
||||
#undef setprogdir
|
||||
|
||||
static void setprogdir (lua_State *L) {
|
||||
char buff[MAX_PATH + 1];
|
||||
char *lb;
|
||||
DWORD nsize = sizeof(buff)/sizeof(char);
|
||||
DWORD n = GetModuleFileNameA(NULL, buff, nsize);
|
||||
if (n == 0 || n == nsize || (lb = strrchr(buff, '\\')) == NULL)
|
||||
luaL_error(L, "unable to get ModuleFileName");
|
||||
else {
|
||||
*lb = '\0';
|
||||
luaL_gsub(L, lua_tostring(L, -1), LUA_EXECDIR, buff);
|
||||
lua_remove(L, -2); /* remove original string */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void pusherror (lua_State *L) {
|
||||
int error = GetLastError();
|
||||
char buffer[128];
|
||||
if (FormatMessageA(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,
|
||||
NULL, error, 0, buffer, sizeof(buffer), NULL))
|
||||
lua_pushstring(L, buffer);
|
||||
else
|
||||
lua_pushfstring(L, "system error %d\n", error);
|
||||
}
|
||||
|
||||
static void ll_unloadlib (void *lib) {
|
||||
FreeLibrary((HINSTANCE)lib);
|
||||
}
|
||||
|
||||
|
||||
static void *ll_load (lua_State *L, const char *path) {
|
||||
HINSTANCE lib = LoadLibraryA(path);
|
||||
if (lib == NULL) pusherror(L);
|
||||
return lib;
|
||||
}
|
||||
|
||||
|
||||
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
|
||||
lua_CFunction f = (lua_CFunction)GetProcAddress((HINSTANCE)lib, sym);
|
||||
if (f == NULL) pusherror(L);
|
||||
return f;
|
||||
}
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
|
||||
#elif defined(LUA_DL_DYLD)
|
||||
/*
|
||||
** {======================================================================
|
||||
** Native Mac OS X / Darwin Implementation
|
||||
** =======================================================================
|
||||
*/
|
||||
|
||||
#include <mach-o/dyld.h>
|
||||
|
||||
|
||||
/* Mac appends a `_' before C function names */
|
||||
#undef POF
|
||||
#define POF "_" LUA_POF
|
||||
|
||||
|
||||
static void pusherror (lua_State *L) {
|
||||
const char *err_str;
|
||||
const char *err_file;
|
||||
NSLinkEditErrors err;
|
||||
int err_num;
|
||||
NSLinkEditError(&err, &err_num, &err_file, &err_str);
|
||||
lua_pushstring(L, err_str);
|
||||
}
|
||||
|
||||
|
||||
static const char *errorfromcode (NSObjectFileImageReturnCode ret) {
|
||||
switch (ret) {
|
||||
case NSObjectFileImageInappropriateFile:
|
||||
return "file is not a bundle";
|
||||
case NSObjectFileImageArch:
|
||||
return "library is for wrong CPU type";
|
||||
case NSObjectFileImageFormat:
|
||||
return "bad format";
|
||||
case NSObjectFileImageAccess:
|
||||
return "cannot access file";
|
||||
case NSObjectFileImageFailure:
|
||||
default:
|
||||
return "unable to load library";
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void ll_unloadlib (void *lib) {
|
||||
NSUnLinkModule((NSModule)lib, NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES);
|
||||
}
|
||||
|
||||
|
||||
static void *ll_load (lua_State *L, const char *path) {
|
||||
NSObjectFileImage img;
|
||||
NSObjectFileImageReturnCode ret;
|
||||
/* this would be a rare case, but prevents crashing if it happens */
|
||||
if(!_dyld_present()) {
|
||||
lua_pushliteral(L, "dyld not present");
|
||||
return NULL;
|
||||
}
|
||||
ret = NSCreateObjectFileImageFromFile(path, &img);
|
||||
if (ret == NSObjectFileImageSuccess) {
|
||||
NSModule mod = NSLinkModule(img, path, NSLINKMODULE_OPTION_PRIVATE |
|
||||
NSLINKMODULE_OPTION_RETURN_ON_ERROR);
|
||||
NSDestroyObjectFileImage(img);
|
||||
if (mod == NULL) pusherror(L);
|
||||
return mod;
|
||||
}
|
||||
lua_pushstring(L, errorfromcode(ret));
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
|
||||
NSSymbol nss = NSLookupSymbolInModule((NSModule)lib, sym);
|
||||
if (nss == NULL) {
|
||||
lua_pushfstring(L, "symbol " LUA_QS " not found", sym);
|
||||
return NULL;
|
||||
}
|
||||
return (lua_CFunction)NSAddressOfSymbol(nss);
|
||||
}
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
|
||||
#else
|
||||
/*
|
||||
** {======================================================
|
||||
** Fallback for other systems
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
#undef LIB_FAIL
|
||||
#define LIB_FAIL "absent"
|
||||
|
||||
|
||||
#define DLMSG "dynamic libraries not enabled; check your Lua installation"
|
||||
|
||||
|
||||
static void ll_unloadlib (void *lib) {
|
||||
(void)lib; /* to avoid warnings */
|
||||
}
|
||||
|
||||
|
||||
static void *ll_load (lua_State *L, const char *path) {
|
||||
(void)path; /* to avoid warnings */
|
||||
lua_pushliteral(L, DLMSG);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
|
||||
(void)lib; (void)sym; /* to avoid warnings */
|
||||
lua_pushliteral(L, DLMSG);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* }====================================================== */
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
static void **ll_register (lua_State *L, const char *path) {
|
||||
void **plib;
|
||||
lua_pushfstring(L, "%s%s", LIBPREFIX, path);
|
||||
lua_gettable(L, LUA_REGISTRYINDEX); /* check library in registry? */
|
||||
if (!lua_isnil(L, -1)) /* is there an entry? */
|
||||
plib = (void **)lua_touserdata(L, -1);
|
||||
else { /* no entry yet; create one */
|
||||
lua_pop(L, 1);
|
||||
plib = (void **)lua_newuserdata(L, sizeof(const void *));
|
||||
*plib = NULL;
|
||||
luaL_getmetatable(L, "_LOADLIB");
|
||||
lua_setmetatable(L, -2);
|
||||
lua_pushfstring(L, "%s%s", LIBPREFIX, path);
|
||||
lua_pushvalue(L, -2);
|
||||
lua_settable(L, LUA_REGISTRYINDEX);
|
||||
}
|
||||
return plib;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** __gc tag method: calls library's `ll_unloadlib' function with the lib
|
||||
** handle
|
||||
*/
|
||||
static int gctm (lua_State *L) {
|
||||
void **lib = (void **)luaL_checkudata(L, 1, "_LOADLIB");
|
||||
if (*lib) ll_unloadlib(*lib);
|
||||
*lib = NULL; /* mark library as closed */
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int ll_loadfunc (lua_State *L, const char *path, const char *sym) {
|
||||
void **reg = ll_register(L, path);
|
||||
if (*reg == NULL) *reg = ll_load(L, path);
|
||||
if (*reg == NULL)
|
||||
return ERRLIB; /* unable to load library */
|
||||
else {
|
||||
lua_CFunction f = ll_sym(L, *reg, sym);
|
||||
if (f == NULL)
|
||||
return ERRFUNC; /* unable to find function */
|
||||
lua_pushcfunction(L, f);
|
||||
return 0; /* return function */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int ll_loadlib (lua_State *L) {
|
||||
const char *path = luaL_checkstring(L, 1);
|
||||
const char *init = luaL_checkstring(L, 2);
|
||||
int stat = ll_loadfunc(L, path, init);
|
||||
if (stat == 0) /* no errors? */
|
||||
return 1; /* return the loaded function */
|
||||
else { /* error; error message is on stack top */
|
||||
lua_pushnil(L);
|
||||
lua_insert(L, -2);
|
||||
lua_pushstring(L, (stat == ERRLIB) ? LIB_FAIL : "init");
|
||||
return 3; /* return nil, error message, and where */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** 'require' function
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
|
||||
static int readable (const char *filename) {
|
||||
FILE *f = fopen(filename, "r"); /* try to open file */
|
||||
if (f == NULL) return 0; /* open failed */
|
||||
fclose(f);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static const char *pushnexttemplate (lua_State *L, const char *path) {
|
||||
const char *l;
|
||||
while (*path == *LUA_PATHSEP) path++; /* skip separators */
|
||||
if (*path == '\0') return NULL; /* no more templates */
|
||||
l = strchr(path, *LUA_PATHSEP); /* find next separator */
|
||||
if (l == NULL) l = path + strlen(path);
|
||||
lua_pushlstring(L, path, l - path); /* template */
|
||||
return l;
|
||||
}
|
||||
|
||||
|
||||
static const char *findfile (lua_State *L, const char *name,
|
||||
const char *pname) {
|
||||
const char *path;
|
||||
name = luaL_gsub(L, name, ".", LUA_DIRSEP);
|
||||
lua_getfield(L, LUA_ENVIRONINDEX, pname);
|
||||
path = lua_tostring(L, -1);
|
||||
if (path == NULL)
|
||||
luaL_error(L, LUA_QL("package.%s") " must be a string", pname);
|
||||
lua_pushliteral(L, ""); /* error accumulator */
|
||||
while ((path = pushnexttemplate(L, path)) != NULL) {
|
||||
const char *filename;
|
||||
filename = luaL_gsub(L, lua_tostring(L, -1), LUA_PATH_MARK, name);
|
||||
lua_remove(L, -2); /* remove path template */
|
||||
if (readable(filename)) /* does file exist and is readable? */
|
||||
return filename; /* return that file name */
|
||||
lua_pushfstring(L, "\n\tno file " LUA_QS, filename);
|
||||
lua_remove(L, -2); /* remove file name */
|
||||
lua_concat(L, 2); /* add entry to possible error message */
|
||||
}
|
||||
return NULL; /* not found */
|
||||
}
|
||||
|
||||
|
||||
static void loaderror (lua_State *L, const char *filename) {
|
||||
luaL_error(L, "error loading module " LUA_QS " from file " LUA_QS ":\n\t%s",
|
||||
lua_tostring(L, 1), filename, lua_tostring(L, -1));
|
||||
}
|
||||
|
||||
|
||||
static int loader_Lua (lua_State *L) {
|
||||
const char *filename;
|
||||
const char *name = luaL_checkstring(L, 1);
|
||||
filename = findfile(L, name, "path");
|
||||
if (filename == NULL) return 1; /* library not found in this path */
|
||||
if (luaL_loadfile(L, filename) != 0)
|
||||
loaderror(L, filename);
|
||||
return 1; /* library loaded successfully */
|
||||
}
|
||||
|
||||
|
||||
static const char *mkfuncname (lua_State *L, const char *modname) {
|
||||
const char *funcname;
|
||||
const char *mark = strchr(modname, *LUA_IGMARK);
|
||||
if (mark) modname = mark + 1;
|
||||
funcname = luaL_gsub(L, modname, ".", LUA_OFSEP);
|
||||
funcname = lua_pushfstring(L, POF"%s", funcname);
|
||||
lua_remove(L, -2); /* remove 'gsub' result */
|
||||
return funcname;
|
||||
}
|
||||
|
||||
|
||||
static int loader_C (lua_State *L) {
|
||||
const char *funcname;
|
||||
const char *name = luaL_checkstring(L, 1);
|
||||
const char *filename = findfile(L, name, "cpath");
|
||||
if (filename == NULL) return 1; /* library not found in this path */
|
||||
funcname = mkfuncname(L, name);
|
||||
if (ll_loadfunc(L, filename, funcname) != 0)
|
||||
loaderror(L, filename);
|
||||
return 1; /* library loaded successfully */
|
||||
}
|
||||
|
||||
|
||||
static int loader_Croot (lua_State *L) {
|
||||
const char *funcname;
|
||||
const char *filename;
|
||||
const char *name = luaL_checkstring(L, 1);
|
||||
const char *p = strchr(name, '.');
|
||||
int stat;
|
||||
if (p == NULL) return 0; /* is root */
|
||||
lua_pushlstring(L, name, p - name);
|
||||
filename = findfile(L, lua_tostring(L, -1), "cpath");
|
||||
if (filename == NULL) return 1; /* root not found */
|
||||
funcname = mkfuncname(L, name);
|
||||
if ((stat = ll_loadfunc(L, filename, funcname)) != 0) {
|
||||
if (stat != ERRFUNC) loaderror(L, filename); /* real error */
|
||||
lua_pushfstring(L, "\n\tno module " LUA_QS " in file " LUA_QS,
|
||||
name, filename);
|
||||
return 1; /* function not found */
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int loader_preload (lua_State *L) {
|
||||
const char *name = luaL_checkstring(L, 1);
|
||||
lua_getfield(L, LUA_ENVIRONINDEX, "preload");
|
||||
if (!lua_istable(L, -1))
|
||||
luaL_error(L, LUA_QL("package.preload") " must be a table");
|
||||
lua_getfield(L, -1, name);
|
||||
if (lua_isnil(L, -1)) /* not found? */
|
||||
lua_pushfstring(L, "\n\tno field package.preload['%s']", name);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static const int sentinel_ = 0;
|
||||
#define sentinel ((void *)&sentinel_)
|
||||
|
||||
|
||||
static int ll_require (lua_State *L) {
|
||||
const char *name = luaL_checkstring(L, 1);
|
||||
int i;
|
||||
lua_settop(L, 1); /* _LOADED table will be at index 2 */
|
||||
lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
|
||||
lua_getfield(L, 2, name);
|
||||
if (lua_toboolean(L, -1)) { /* is it there? */
|
||||
if (lua_touserdata(L, -1) == sentinel) /* check loops */
|
||||
luaL_error(L, "loop or previous error loading module " LUA_QS, name);
|
||||
return 1; /* package is already loaded */
|
||||
}
|
||||
/* else must load it; iterate over available loaders */
|
||||
lua_getfield(L, LUA_ENVIRONINDEX, "loaders");
|
||||
if (!lua_istable(L, -1))
|
||||
luaL_error(L, LUA_QL("package.loaders") " must be a table");
|
||||
lua_pushliteral(L, ""); /* error message accumulator */
|
||||
for (i=1; ; i++) {
|
||||
lua_rawgeti(L, -2, i); /* get a loader */
|
||||
if (lua_isnil(L, -1))
|
||||
luaL_error(L, "module " LUA_QS " not found:%s",
|
||||
name, lua_tostring(L, -2));
|
||||
lua_pushstring(L, name);
|
||||
lua_call(L, 1, 1); /* call it */
|
||||
if (lua_isfunction(L, -1)) /* did it find module? */
|
||||
break; /* module loaded successfully */
|
||||
else if (lua_isstring(L, -1)) /* loader returned error message? */
|
||||
lua_concat(L, 2); /* accumulate it */
|
||||
else
|
||||
lua_pop(L, 1);
|
||||
}
|
||||
lua_pushlightuserdata(L, sentinel);
|
||||
lua_setfield(L, 2, name); /* _LOADED[name] = sentinel */
|
||||
lua_pushstring(L, name); /* pass name as argument to module */
|
||||
lua_call(L, 1, 1); /* run loaded module */
|
||||
if (!lua_isnil(L, -1)) /* non-nil return? */
|
||||
lua_setfield(L, 2, name); /* _LOADED[name] = returned value */
|
||||
lua_getfield(L, 2, name);
|
||||
if (lua_touserdata(L, -1) == sentinel) { /* module did not set a value? */
|
||||
lua_pushboolean(L, 1); /* use true as result */
|
||||
lua_pushvalue(L, -1); /* extra copy to be returned */
|
||||
lua_setfield(L, 2, name); /* _LOADED[name] = true */
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** 'module' function
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
|
||||
static void setfenv (lua_State *L) {
|
||||
lua_Debug ar;
|
||||
if (lua_getstack(L, 1, &ar) == 0 ||
|
||||
lua_getinfo(L, "f", &ar) == 0 || /* get calling function */
|
||||
lua_iscfunction(L, -1))
|
||||
luaL_error(L, LUA_QL("module") " not called from a Lua function");
|
||||
lua_pushvalue(L, -2);
|
||||
lua_setfenv(L, -2);
|
||||
lua_pop(L, 1);
|
||||
}
|
||||
|
||||
|
||||
static void dooptions (lua_State *L, int n) {
|
||||
int i;
|
||||
for (i = 2; i <= n; i++) {
|
||||
lua_pushvalue(L, i); /* get option (a function) */
|
||||
lua_pushvalue(L, -2); /* module */
|
||||
lua_call(L, 1, 0);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void modinit (lua_State *L, const char *modname) {
|
||||
const char *dot;
|
||||
lua_pushvalue(L, -1);
|
||||
lua_setfield(L, -2, "_M"); /* module._M = module */
|
||||
lua_pushstring(L, modname);
|
||||
lua_setfield(L, -2, "_NAME");
|
||||
dot = strrchr(modname, '.'); /* look for last dot in module name */
|
||||
if (dot == NULL) dot = modname;
|
||||
else dot++;
|
||||
/* set _PACKAGE as package name (full module name minus last part) */
|
||||
lua_pushlstring(L, modname, dot - modname);
|
||||
lua_setfield(L, -2, "_PACKAGE");
|
||||
}
|
||||
|
||||
|
||||
static int ll_module (lua_State *L) {
|
||||
const char *modname = luaL_checkstring(L, 1);
|
||||
int loaded = lua_gettop(L) + 1; /* index of _LOADED table */
|
||||
lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
|
||||
lua_getfield(L, loaded, modname); /* get _LOADED[modname] */
|
||||
if (!lua_istable(L, -1)) { /* not found? */
|
||||
lua_pop(L, 1); /* remove previous result */
|
||||
/* try global variable (and create one if it does not exist) */
|
||||
if (luaL_findtable(L, LUA_GLOBALSINDEX, modname, 1) != NULL)
|
||||
return luaL_error(L, "name conflict for module " LUA_QS, modname);
|
||||
lua_pushvalue(L, -1);
|
||||
lua_setfield(L, loaded, modname); /* _LOADED[modname] = new table */
|
||||
}
|
||||
/* check whether table already has a _NAME field */
|
||||
lua_getfield(L, -1, "_NAME");
|
||||
if (!lua_isnil(L, -1)) /* is table an initialized module? */
|
||||
lua_pop(L, 1);
|
||||
else { /* no; initialize it */
|
||||
lua_pop(L, 1);
|
||||
modinit(L, modname);
|
||||
}
|
||||
lua_pushvalue(L, -1);
|
||||
setfenv(L);
|
||||
dooptions(L, loaded - 1);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int ll_seeall (lua_State *L) {
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
if (!lua_getmetatable(L, 1)) {
|
||||
lua_createtable(L, 0, 1); /* create new metatable */
|
||||
lua_pushvalue(L, -1);
|
||||
lua_setmetatable(L, 1);
|
||||
}
|
||||
lua_pushvalue(L, LUA_GLOBALSINDEX);
|
||||
lua_setfield(L, -2, "__index"); /* mt.__index = _G */
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
|
||||
/* auxiliary mark (for internal use) */
|
||||
#define AUXMARK "\1"
|
||||
|
||||
static void setpath (lua_State *L, const char *fieldname, const char *envname,
|
||||
const char *def) {
|
||||
const char *path = getenv(envname);
|
||||
if (path == NULL) /* no environment variable? */
|
||||
lua_pushstring(L, def); /* use default */
|
||||
else {
|
||||
/* replace ";;" by ";AUXMARK;" and then AUXMARK by default path */
|
||||
path = luaL_gsub(L, path, LUA_PATHSEP LUA_PATHSEP,
|
||||
LUA_PATHSEP AUXMARK LUA_PATHSEP);
|
||||
luaL_gsub(L, path, AUXMARK, def);
|
||||
lua_remove(L, -2);
|
||||
}
|
||||
setprogdir(L);
|
||||
lua_setfield(L, -2, fieldname);
|
||||
}
|
||||
|
||||
|
||||
static const luaL_Reg pk_funcs[] = {
|
||||
{"loadlib", ll_loadlib},
|
||||
{"seeall", ll_seeall},
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
|
||||
static const luaL_Reg ll_funcs[] = {
|
||||
{"module", ll_module},
|
||||
{"require", ll_require},
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
|
||||
static const lua_CFunction loaders[] =
|
||||
{loader_preload, loader_Lua, loader_C, loader_Croot, NULL};
|
||||
|
||||
|
||||
LUALIB_API int luaopen_package (lua_State *L) {
|
||||
int i;
|
||||
/* create new type _LOADLIB */
|
||||
luaL_newmetatable(L, "_LOADLIB");
|
||||
lua_pushcfunction(L, gctm);
|
||||
lua_setfield(L, -2, "__gc");
|
||||
/* create `package' table */
|
||||
luaL_register(L, LUA_LOADLIBNAME, pk_funcs);
|
||||
#if defined(LUA_COMPAT_LOADLIB)
|
||||
lua_getfield(L, -1, "loadlib");
|
||||
lua_setfield(L, LUA_GLOBALSINDEX, "loadlib");
|
||||
#endif
|
||||
lua_pushvalue(L, -1);
|
||||
lua_replace(L, LUA_ENVIRONINDEX);
|
||||
/* create `loaders' table */
|
||||
lua_createtable(L, sizeof(loaders)/sizeof(loaders[0]) - 1, 0);
|
||||
/* fill it with pre-defined loaders */
|
||||
for (i=0; loaders[i] != NULL; i++) {
|
||||
lua_pushcfunction(L, loaders[i]);
|
||||
lua_rawseti(L, -2, i+1);
|
||||
}
|
||||
lua_setfield(L, -2, "loaders"); /* put it in field `loaders' */
|
||||
setpath(L, "path", LUA_PATH, LUA_PATH_DEFAULT); /* set field `path' */
|
||||
setpath(L, "cpath", LUA_CPATH, LUA_CPATH_DEFAULT); /* set field `cpath' */
|
||||
/* store config information */
|
||||
lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATHSEP "\n" LUA_PATH_MARK "\n"
|
||||
LUA_EXECDIR "\n" LUA_IGMARK);
|
||||
lua_setfield(L, -2, "config");
|
||||
/* set field `loaded' */
|
||||
luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 2);
|
||||
lua_setfield(L, -2, "loaded");
|
||||
/* set field `preload' */
|
||||
lua_newtable(L);
|
||||
lua_setfield(L, -2, "preload");
|
||||
lua_pushvalue(L, LUA_GLOBALSINDEX);
|
||||
luaL_register(L, NULL, ll_funcs); /* open lib into global table */
|
||||
lua_pop(L, 1);
|
||||
return 1; /* return 'package' table */
|
||||
}
|
||||
|
|
@ -1,214 +0,0 @@
|
|||
/*
|
||||
** $Id: lobject.c,v 2.22.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Some generic functions over Lua objects
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#include <ctype.h>
|
||||
#include <stdarg.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#define lobject_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "ldo.h"
|
||||
#include "lmem.h"
|
||||
#include "lobject.h"
|
||||
#include "lstate.h"
|
||||
#include "lstring.h"
|
||||
#include "lvm.h"
|
||||
|
||||
|
||||
|
||||
const TValue luaO_nilobject_ = {{NULL}, LUA_TNIL};
|
||||
|
||||
|
||||
/*
|
||||
** converts an integer to a "floating point byte", represented as
|
||||
** (eeeeexxx), where the real value is (1xxx) * 2^(eeeee - 1) if
|
||||
** eeeee != 0 and (xxx) otherwise.
|
||||
*/
|
||||
int luaO_int2fb (unsigned int x) {
|
||||
int e = 0; /* expoent */
|
||||
while (x >= 16) {
|
||||
x = (x+1) >> 1;
|
||||
e++;
|
||||
}
|
||||
if (x < 8) return x;
|
||||
else return ((e+1) << 3) | (cast_int(x) - 8);
|
||||
}
|
||||
|
||||
|
||||
/* converts back */
|
||||
int luaO_fb2int (int x) {
|
||||
int e = (x >> 3) & 31;
|
||||
if (e == 0) return x;
|
||||
else return ((x & 7)+8) << (e - 1);
|
||||
}
|
||||
|
||||
|
||||
int luaO_log2 (unsigned int x) {
|
||||
static const lu_byte log_2[256] = {
|
||||
0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
|
||||
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
|
||||
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
|
||||
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
|
||||
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
|
||||
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
|
||||
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
|
||||
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
|
||||
};
|
||||
int l = -1;
|
||||
while (x >= 256) { l += 8; x >>= 8; }
|
||||
return l + log_2[x];
|
||||
|
||||
}
|
||||
|
||||
|
||||
int luaO_rawequalObj (const TValue *t1, const TValue *t2) {
|
||||
if (ttype(t1) != ttype(t2)) return 0;
|
||||
else switch (ttype(t1)) {
|
||||
case LUA_TNIL:
|
||||
return 1;
|
||||
case LUA_TNUMBER:
|
||||
return luai_numeq(nvalue(t1), nvalue(t2));
|
||||
case LUA_TBOOLEAN:
|
||||
return bvalue(t1) == bvalue(t2); /* boolean true must be 1 !! */
|
||||
case LUA_TLIGHTUSERDATA:
|
||||
return pvalue(t1) == pvalue(t2);
|
||||
default:
|
||||
lua_assert(iscollectable(t1));
|
||||
return gcvalue(t1) == gcvalue(t2);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
int luaO_str2d (const char *s, lua_Number *result) {
|
||||
char *endptr;
|
||||
*result = lua_str2number(s, &endptr);
|
||||
if (endptr == s) return 0; /* conversion failed */
|
||||
if (*endptr == 'x' || *endptr == 'X') /* maybe an hexadecimal constant? */
|
||||
*result = cast_num(strtoul(s, &endptr, 16));
|
||||
if (*endptr == '\0') return 1; /* most common case */
|
||||
while (isspace(cast(unsigned char, *endptr))) endptr++;
|
||||
if (*endptr != '\0') return 0; /* invalid trailing characters? */
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
|
||||
static void pushstr (lua_State *L, const char *str) {
|
||||
setsvalue2s(L, L->top, luaS_new(L, str));
|
||||
incr_top(L);
|
||||
}
|
||||
|
||||
|
||||
/* this function handles only `%d', `%c', %f, %p, and `%s' formats */
|
||||
const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
|
||||
int n = 1;
|
||||
pushstr(L, "");
|
||||
for (;;) {
|
||||
const char *e = strchr(fmt, '%');
|
||||
if (e == NULL) break;
|
||||
setsvalue2s(L, L->top, luaS_newlstr(L, fmt, e-fmt));
|
||||
incr_top(L);
|
||||
switch (*(e+1)) {
|
||||
case 's': {
|
||||
const char *s = va_arg(argp, char *);
|
||||
if (s == NULL) s = "(null)";
|
||||
pushstr(L, s);
|
||||
break;
|
||||
}
|
||||
case 'c': {
|
||||
char buff[2];
|
||||
buff[0] = cast(char, va_arg(argp, int));
|
||||
buff[1] = '\0';
|
||||
pushstr(L, buff);
|
||||
break;
|
||||
}
|
||||
case 'd': {
|
||||
setnvalue(L->top, cast_num(va_arg(argp, int)));
|
||||
incr_top(L);
|
||||
break;
|
||||
}
|
||||
case 'f': {
|
||||
setnvalue(L->top, cast_num(va_arg(argp, l_uacNumber)));
|
||||
incr_top(L);
|
||||
break;
|
||||
}
|
||||
case 'p': {
|
||||
char buff[4*sizeof(void *) + 8]; /* should be enough space for a `%p' */
|
||||
sprintf(buff, "%p", va_arg(argp, void *));
|
||||
pushstr(L, buff);
|
||||
break;
|
||||
}
|
||||
case '%': {
|
||||
pushstr(L, "%");
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
char buff[3];
|
||||
buff[0] = '%';
|
||||
buff[1] = *(e+1);
|
||||
buff[2] = '\0';
|
||||
pushstr(L, buff);
|
||||
break;
|
||||
}
|
||||
}
|
||||
n += 2;
|
||||
fmt = e+2;
|
||||
}
|
||||
pushstr(L, fmt);
|
||||
luaV_concat(L, n+1, cast_int(L->top - L->base) - 1);
|
||||
L->top -= n;
|
||||
return svalue(L->top - 1);
|
||||
}
|
||||
|
||||
|
||||
const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
|
||||
const char *msg;
|
||||
va_list argp;
|
||||
va_start(argp, fmt);
|
||||
msg = luaO_pushvfstring(L, fmt, argp);
|
||||
va_end(argp);
|
||||
return msg;
|
||||
}
|
||||
|
||||
|
||||
void luaO_chunkid (char *out, const char *source, size_t bufflen) {
|
||||
if (*source == '=') {
|
||||
strncpy(out, source+1, bufflen); /* remove first char */
|
||||
out[bufflen-1] = '\0'; /* ensures null termination */
|
||||
}
|
||||
else { /* out = "source", or "...source" */
|
||||
if (*source == '@') {
|
||||
size_t l;
|
||||
source++; /* skip the `@' */
|
||||
bufflen -= sizeof(" '...' ");
|
||||
l = strlen(source);
|
||||
strcpy(out, "");
|
||||
if (l > bufflen) {
|
||||
source += (l-bufflen); /* get last part of file name */
|
||||
strcat(out, "...");
|
||||
}
|
||||
strcat(out, source);
|
||||
}
|
||||
else { /* out = [string "string"] */
|
||||
size_t len = strcspn(source, "\n\r"); /* stop at first newline */
|
||||
bufflen -= sizeof(" [string \"...\"] ");
|
||||
if (len > bufflen) len = bufflen;
|
||||
strcpy(out, "[string \"");
|
||||
if (source[len] != '\0') { /* must truncate? */
|
||||
strncat(out, source, len);
|
||||
strcat(out, "...");
|
||||
}
|
||||
else
|
||||
strcat(out, source);
|
||||
strcat(out, "\"]");
|
||||
}
|
||||
}
|
||||
}
|
|
@ -1,381 +0,0 @@
|
|||
/*
|
||||
** $Id: lobject.h,v 2.20.1.2 2008/08/06 13:29:48 roberto Exp $
|
||||
** Type definitions for Lua objects
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#ifndef lobject_h
|
||||
#define lobject_h
|
||||
|
||||
|
||||
#include <stdarg.h>
|
||||
|
||||
|
||||
#include "llimits.h"
|
||||
#include "lua.h"
|
||||
|
||||
|
||||
/* tags for values visible from Lua */
|
||||
#define LAST_TAG LUA_TTHREAD
|
||||
|
||||
#define NUM_TAGS (LAST_TAG+1)
|
||||
|
||||
|
||||
/*
|
||||
** Extra tags for non-values
|
||||
*/
|
||||
#define LUA_TPROTO (LAST_TAG+1)
|
||||
#define LUA_TUPVAL (LAST_TAG+2)
|
||||
#define LUA_TDEADKEY (LAST_TAG+3)
|
||||
|
||||
|
||||
/*
|
||||
** Union of all collectable objects
|
||||
*/
|
||||
typedef union GCObject GCObject;
|
||||
|
||||
|
||||
/*
|
||||
** Common Header for all collectable objects (in macro form, to be
|
||||
** included in other objects)
|
||||
*/
|
||||
#define CommonHeader GCObject *next; lu_byte tt; lu_byte marked
|
||||
|
||||
|
||||
/*
|
||||
** Common header in struct form
|
||||
*/
|
||||
typedef struct GCheader {
|
||||
CommonHeader;
|
||||
} GCheader;
|
||||
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** Union of all Lua values
|
||||
*/
|
||||
typedef union {
|
||||
GCObject *gc;
|
||||
void *p;
|
||||
lua_Number n;
|
||||
int b;
|
||||
} Value;
|
||||
|
||||
|
||||
/*
|
||||
** Tagged Values
|
||||
*/
|
||||
|
||||
#define TValuefields Value value; int tt
|
||||
|
||||
typedef struct lua_TValue {
|
||||
TValuefields;
|
||||
} TValue;
|
||||
|
||||
|
||||
/* Macros to test type */
|
||||
#define ttisnil(o) (ttype(o) == LUA_TNIL)
|
||||
#define ttisnumber(o) (ttype(o) == LUA_TNUMBER)
|
||||
#define ttisstring(o) (ttype(o) == LUA_TSTRING)
|
||||
#define ttistable(o) (ttype(o) == LUA_TTABLE)
|
||||
#define ttisfunction(o) (ttype(o) == LUA_TFUNCTION)
|
||||
#define ttisboolean(o) (ttype(o) == LUA_TBOOLEAN)
|
||||
#define ttisuserdata(o) (ttype(o) == LUA_TUSERDATA)
|
||||
#define ttisthread(o) (ttype(o) == LUA_TTHREAD)
|
||||
#define ttislightuserdata(o) (ttype(o) == LUA_TLIGHTUSERDATA)
|
||||
|
||||
/* Macros to access values */
|
||||
#define ttype(o) ((o)->tt)
|
||||
#define gcvalue(o) check_exp(iscollectable(o), (o)->value.gc)
|
||||
#define pvalue(o) check_exp(ttislightuserdata(o), (o)->value.p)
|
||||
#define nvalue(o) check_exp(ttisnumber(o), (o)->value.n)
|
||||
#define rawtsvalue(o) check_exp(ttisstring(o), &(o)->value.gc->ts)
|
||||
#define tsvalue(o) (&rawtsvalue(o)->tsv)
|
||||
#define rawuvalue(o) check_exp(ttisuserdata(o), &(o)->value.gc->u)
|
||||
#define uvalue(o) (&rawuvalue(o)->uv)
|
||||
#define clvalue(o) check_exp(ttisfunction(o), &(o)->value.gc->cl)
|
||||
#define hvalue(o) check_exp(ttistable(o), &(o)->value.gc->h)
|
||||
#define bvalue(o) check_exp(ttisboolean(o), (o)->value.b)
|
||||
#define thvalue(o) check_exp(ttisthread(o), &(o)->value.gc->th)
|
||||
|
||||
#define l_isfalse(o) (ttisnil(o) || (ttisboolean(o) && bvalue(o) == 0))
|
||||
|
||||
/*
|
||||
** for internal debug only
|
||||
*/
|
||||
#define checkconsistency(obj) \
|
||||
lua_assert(!iscollectable(obj) || (ttype(obj) == (obj)->value.gc->gch.tt))
|
||||
|
||||
#define checkliveness(g,obj) \
|
||||
lua_assert(!iscollectable(obj) || \
|
||||
((ttype(obj) == (obj)->value.gc->gch.tt) && !isdead(g, (obj)->value.gc)))
|
||||
|
||||
|
||||
/* Macros to set values */
|
||||
#define setnilvalue(obj) ((obj)->tt=LUA_TNIL)
|
||||
|
||||
#define setnvalue(obj,x) \
|
||||
{ TValue *i_o=(obj); i_o->value.n=(x); i_o->tt=LUA_TNUMBER; }
|
||||
|
||||
#define setpvalue(obj,x) \
|
||||
{ TValue *i_o=(obj); i_o->value.p=(x); i_o->tt=LUA_TLIGHTUSERDATA; }
|
||||
|
||||
#define setbvalue(obj,x) \
|
||||
{ TValue *i_o=(obj); i_o->value.b=(x); i_o->tt=LUA_TBOOLEAN; }
|
||||
|
||||
#define setsvalue(L,obj,x) \
|
||||
{ TValue *i_o=(obj); \
|
||||
i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TSTRING; \
|
||||
checkliveness(G(L),i_o); }
|
||||
|
||||
#define setuvalue(L,obj,x) \
|
||||
{ TValue *i_o=(obj); \
|
||||
i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TUSERDATA; \
|
||||
checkliveness(G(L),i_o); }
|
||||
|
||||
#define setthvalue(L,obj,x) \
|
||||
{ TValue *i_o=(obj); \
|
||||
i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TTHREAD; \
|
||||
checkliveness(G(L),i_o); }
|
||||
|
||||
#define setclvalue(L,obj,x) \
|
||||
{ TValue *i_o=(obj); \
|
||||
i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TFUNCTION; \
|
||||
checkliveness(G(L),i_o); }
|
||||
|
||||
#define sethvalue(L,obj,x) \
|
||||
{ TValue *i_o=(obj); \
|
||||
i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TTABLE; \
|
||||
checkliveness(G(L),i_o); }
|
||||
|
||||
#define setptvalue(L,obj,x) \
|
||||
{ TValue *i_o=(obj); \
|
||||
i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TPROTO; \
|
||||
checkliveness(G(L),i_o); }
|
||||
|
||||
|
||||
|
||||
|
||||
#define setobj(L,obj1,obj2) \
|
||||
{ const TValue *o2=(obj2); TValue *o1=(obj1); \
|
||||
o1->value = o2->value; o1->tt=o2->tt; \
|
||||
checkliveness(G(L),o1); }
|
||||
|
||||
|
||||
/*
|
||||
** different types of sets, according to destination
|
||||
*/
|
||||
|
||||
/* from stack to (same) stack */
|
||||
#define setobjs2s setobj
|
||||
/* to stack (not from same stack) */
|
||||
#define setobj2s setobj
|
||||
#define setsvalue2s setsvalue
|
||||
#define sethvalue2s sethvalue
|
||||
#define setptvalue2s setptvalue
|
||||
/* from table to same table */
|
||||
#define setobjt2t setobj
|
||||
/* to table */
|
||||
#define setobj2t setobj
|
||||
/* to new object */
|
||||
#define setobj2n setobj
|
||||
#define setsvalue2n setsvalue
|
||||
|
||||
#define setttype(obj, tt) (ttype(obj) = (tt))
|
||||
|
||||
|
||||
#define iscollectable(o) (ttype(o) >= LUA_TSTRING)
|
||||
|
||||
|
||||
|
||||
typedef TValue *StkId; /* index to stack elements */
|
||||
|
||||
|
||||
/*
|
||||
** String headers for string table
|
||||
*/
|
||||
typedef union TString {
|
||||
L_Umaxalign dummy; /* ensures maximum alignment for strings */
|
||||
struct {
|
||||
CommonHeader;
|
||||
lu_byte reserved;
|
||||
unsigned int hash;
|
||||
size_t len;
|
||||
} tsv;
|
||||
} TString;
|
||||
|
||||
|
||||
#define getstr(ts) cast(const char *, (ts) + 1)
|
||||
#define svalue(o) getstr(rawtsvalue(o))
|
||||
|
||||
|
||||
|
||||
typedef union Udata {
|
||||
L_Umaxalign dummy; /* ensures maximum alignment for `local' udata */
|
||||
struct {
|
||||
CommonHeader;
|
||||
struct Table *metatable;
|
||||
struct Table *env;
|
||||
size_t len;
|
||||
} uv;
|
||||
} Udata;
|
||||
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** Function Prototypes
|
||||
*/
|
||||
typedef struct Proto {
|
||||
CommonHeader;
|
||||
TValue *k; /* constants used by the function */
|
||||
Instruction *code;
|
||||
struct Proto **p; /* functions defined inside the function */
|
||||
int *lineinfo; /* map from opcodes to source lines */
|
||||
struct LocVar *locvars; /* information about local variables */
|
||||
TString **upvalues; /* upvalue names */
|
||||
TString *source;
|
||||
int sizeupvalues;
|
||||
int sizek; /* size of `k' */
|
||||
int sizecode;
|
||||
int sizelineinfo;
|
||||
int sizep; /* size of `p' */
|
||||
int sizelocvars;
|
||||
int linedefined;
|
||||
int lastlinedefined;
|
||||
GCObject *gclist;
|
||||
lu_byte nups; /* number of upvalues */
|
||||
lu_byte numparams;
|
||||
lu_byte is_vararg;
|
||||
lu_byte maxstacksize;
|
||||
} Proto;
|
||||
|
||||
|
||||
/* masks for new-style vararg */
|
||||
#define VARARG_HASARG 1
|
||||
#define VARARG_ISVARARG 2
|
||||
#define VARARG_NEEDSARG 4
|
||||
|
||||
|
||||
typedef struct LocVar {
|
||||
TString *varname;
|
||||
int startpc; /* first point where variable is active */
|
||||
int endpc; /* first point where variable is dead */
|
||||
} LocVar;
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** Upvalues
|
||||
*/
|
||||
|
||||
typedef struct UpVal {
|
||||
CommonHeader;
|
||||
TValue *v; /* points to stack or to its own value */
|
||||
union {
|
||||
TValue value; /* the value (when closed) */
|
||||
struct { /* double linked list (when open) */
|
||||
struct UpVal *prev;
|
||||
struct UpVal *next;
|
||||
} l;
|
||||
} u;
|
||||
} UpVal;
|
||||
|
||||
|
||||
/*
|
||||
** Closures
|
||||
*/
|
||||
|
||||
#define ClosureHeader \
|
||||
CommonHeader; lu_byte isC; lu_byte nupvalues; GCObject *gclist; \
|
||||
struct Table *env
|
||||
|
||||
typedef struct CClosure {
|
||||
ClosureHeader;
|
||||
lua_CFunction f;
|
||||
TValue upvalue[1];
|
||||
} CClosure;
|
||||
|
||||
|
||||
typedef struct LClosure {
|
||||
ClosureHeader;
|
||||
struct Proto *p;
|
||||
UpVal *upvals[1];
|
||||
} LClosure;
|
||||
|
||||
|
||||
typedef union Closure {
|
||||
CClosure c;
|
||||
LClosure l;
|
||||
} Closure;
|
||||
|
||||
|
||||
#define iscfunction(o) (ttype(o) == LUA_TFUNCTION && clvalue(o)->c.isC)
|
||||
#define isLfunction(o) (ttype(o) == LUA_TFUNCTION && !clvalue(o)->c.isC)
|
||||
|
||||
|
||||
/*
|
||||
** Tables
|
||||
*/
|
||||
|
||||
typedef union TKey {
|
||||
struct {
|
||||
TValuefields;
|
||||
struct Node *next; /* for chaining */
|
||||
} nk;
|
||||
TValue tvk;
|
||||
} TKey;
|
||||
|
||||
|
||||
typedef struct Node {
|
||||
TValue i_val;
|
||||
TKey i_key;
|
||||
} Node;
|
||||
|
||||
|
||||
typedef struct Table {
|
||||
CommonHeader;
|
||||
lu_byte flags; /* 1<<p means tagmethod(p) is not present */
|
||||
lu_byte lsizenode; /* log2 of size of `node' array */
|
||||
struct Table *metatable;
|
||||
TValue *array; /* array part */
|
||||
Node *node;
|
||||
Node *lastfree; /* any free position is before this position */
|
||||
GCObject *gclist;
|
||||
int sizearray; /* size of `array' array */
|
||||
} Table;
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** `module' operation for hashing (size is always a power of 2)
|
||||
*/
|
||||
#define lmod(s,size) \
|
||||
(check_exp((size&(size-1))==0, (cast(int, (s) & ((size)-1)))))
|
||||
|
||||
|
||||
#define twoto(x) (1<<(x))
|
||||
#define sizenode(t) (twoto((t)->lsizenode))
|
||||
|
||||
|
||||
#define luaO_nilobject (&luaO_nilobject_)
|
||||
|
||||
LUAI_DATA const TValue luaO_nilobject_;
|
||||
|
||||
#define ceillog2(x) (luaO_log2((x)-1) + 1)
|
||||
|
||||
LUAI_FUNC int luaO_log2 (unsigned int x);
|
||||
LUAI_FUNC int luaO_int2fb (unsigned int x);
|
||||
LUAI_FUNC int luaO_fb2int (int x);
|
||||
LUAI_FUNC int luaO_rawequalObj (const TValue *t1, const TValue *t2);
|
||||
LUAI_FUNC int luaO_str2d (const char *s, lua_Number *result);
|
||||
LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt,
|
||||
va_list argp);
|
||||
LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...);
|
||||
LUAI_FUNC void luaO_chunkid (char *out, const char *source, size_t len);
|
||||
|
||||
|
||||
#endif
|
||||
|
|
@ -1,102 +0,0 @@
|
|||
/*
|
||||
** $Id: lopcodes.c,v 1.37.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#define lopcodes_c
|
||||
#define LUA_CORE
|
||||
|
||||
|
||||
#include "lopcodes.h"
|
||||
|
||||
|
||||
/* ORDER OP */
|
||||
|
||||
const char *const luaP_opnames[NUM_OPCODES+1] = {
|
||||
"MOVE",
|
||||
"LOADK",
|
||||
"LOADBOOL",
|
||||
"LOADNIL",
|
||||
"GETUPVAL",
|
||||
"GETGLOBAL",
|
||||
"GETTABLE",
|
||||
"SETGLOBAL",
|
||||
"SETUPVAL",
|
||||
"SETTABLE",
|
||||
"NEWTABLE",
|
||||
"SELF",
|
||||
"ADD",
|
||||
"SUB",
|
||||
"MUL",
|
||||
"DIV",
|
||||
"MOD",
|
||||
"POW",
|
||||
"UNM",
|
||||
"NOT",
|
||||
"LEN",
|
||||
"CONCAT",
|
||||
"JMP",
|
||||
"EQ",
|
||||
"LT",
|
||||
"LE",
|
||||
"TEST",
|
||||
"TESTSET",
|
||||
"CALL",
|
||||
"TAILCALL",
|
||||
"RETURN",
|
||||
"FORLOOP",
|
||||
"FORPREP",
|
||||
"TFORLOOP",
|
||||
"SETLIST",
|
||||
"CLOSE",
|
||||
"CLOSURE",
|
||||
"VARARG",
|
||||
NULL
|
||||
};
|
||||
|
||||
|
||||
#define opmode(t,a,b,c,m) (((t)<<7) | ((a)<<6) | ((b)<<4) | ((c)<<2) | (m))
|
||||
|
||||
const lu_byte luaP_opmodes[NUM_OPCODES] = {
|
||||
/* T A B C mode opcode */
|
||||
opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_MOVE */
|
||||
,opmode(0, 1, OpArgK, OpArgN, iABx) /* OP_LOADK */
|
||||
,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_LOADBOOL */
|
||||
,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_LOADNIL */
|
||||
,opmode(0, 1, OpArgU, OpArgN, iABC) /* OP_GETUPVAL */
|
||||
,opmode(0, 1, OpArgK, OpArgN, iABx) /* OP_GETGLOBAL */
|
||||
,opmode(0, 1, OpArgR, OpArgK, iABC) /* OP_GETTABLE */
|
||||
,opmode(0, 0, OpArgK, OpArgN, iABx) /* OP_SETGLOBAL */
|
||||
,opmode(0, 0, OpArgU, OpArgN, iABC) /* OP_SETUPVAL */
|
||||
,opmode(0, 0, OpArgK, OpArgK, iABC) /* OP_SETTABLE */
|
||||
,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_NEWTABLE */
|
||||
,opmode(0, 1, OpArgR, OpArgK, iABC) /* OP_SELF */
|
||||
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_ADD */
|
||||
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_SUB */
|
||||
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_MUL */
|
||||
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_DIV */
|
||||
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_MOD */
|
||||
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_POW */
|
||||
,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_UNM */
|
||||
,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_NOT */
|
||||
,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_LEN */
|
||||
,opmode(0, 1, OpArgR, OpArgR, iABC) /* OP_CONCAT */
|
||||
,opmode(0, 0, OpArgR, OpArgN, iAsBx) /* OP_JMP */
|
||||
,opmode(1, 0, OpArgK, OpArgK, iABC) /* OP_EQ */
|
||||
,opmode(1, 0, OpArgK, OpArgK, iABC) /* OP_LT */
|
||||
,opmode(1, 0, OpArgK, OpArgK, iABC) /* OP_LE */
|
||||
,opmode(1, 1, OpArgR, OpArgU, iABC) /* OP_TEST */
|
||||
,opmode(1, 1, OpArgR, OpArgU, iABC) /* OP_TESTSET */
|
||||
,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_CALL */
|
||||
,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_TAILCALL */
|
||||
,opmode(0, 0, OpArgU, OpArgN, iABC) /* OP_RETURN */
|
||||
,opmode(0, 1, OpArgR, OpArgN, iAsBx) /* OP_FORLOOP */
|
||||
,opmode(0, 1, OpArgR, OpArgN, iAsBx) /* OP_FORPREP */
|
||||
,opmode(1, 0, OpArgN, OpArgU, iABC) /* OP_TFORLOOP */
|
||||
,opmode(0, 0, OpArgU, OpArgU, iABC) /* OP_SETLIST */
|
||||
,opmode(0, 0, OpArgN, OpArgN, iABC) /* OP_CLOSE */
|
||||
,opmode(0, 1, OpArgU, OpArgN, iABx) /* OP_CLOSURE */
|
||||
,opmode(0, 1, OpArgU, OpArgN, iABC) /* OP_VARARG */
|
||||
};
|
||||
|
|
@ -1,268 +0,0 @@
|
|||
/*
|
||||
** $Id: lopcodes.h,v 1.125.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Opcodes for Lua virtual machine
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef lopcodes_h
|
||||
#define lopcodes_h
|
||||
|
||||
#include "llimits.h"
|
||||
|
||||
|
||||
/*===========================================================================
|
||||
We assume that instructions are unsigned numbers.
|
||||
All instructions have an opcode in the first 6 bits.
|
||||
Instructions can have the following fields:
|
||||
`A' : 8 bits
|
||||
`B' : 9 bits
|
||||
`C' : 9 bits
|
||||
`Bx' : 18 bits (`B' and `C' together)
|
||||
`sBx' : signed Bx
|
||||
|
||||
A signed argument is represented in excess K; that is, the number
|
||||
value is the unsigned value minus K. K is exactly the maximum value
|
||||
for that argument (so that -max is represented by 0, and +max is
|
||||
represented by 2*max), which is half the maximum for the corresponding
|
||||
unsigned argument.
|
||||
===========================================================================*/
|
||||
|
||||
|
||||
enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */
|
||||
|
||||
|
||||
/*
|
||||
** size and position of opcode arguments.
|
||||
*/
|
||||
#define SIZE_C 9
|
||||
#define SIZE_B 9
|
||||
#define SIZE_Bx (SIZE_C + SIZE_B)
|
||||
#define SIZE_A 8
|
||||
|
||||
#define SIZE_OP 6
|
||||
|
||||
#define POS_OP 0
|
||||
#define POS_A (POS_OP + SIZE_OP)
|
||||
#define POS_C (POS_A + SIZE_A)
|
||||
#define POS_B (POS_C + SIZE_C)
|
||||
#define POS_Bx POS_C
|
||||
|
||||
|
||||
/*
|
||||
** limits for opcode arguments.
|
||||
** we use (signed) int to manipulate most arguments,
|
||||
** so they must fit in LUAI_BITSINT-1 bits (-1 for sign)
|
||||
*/
|
||||
#if SIZE_Bx < LUAI_BITSINT-1
|
||||
#define MAXARG_Bx ((1<<SIZE_Bx)-1)
|
||||
#define MAXARG_sBx (MAXARG_Bx>>1) /* `sBx' is signed */
|
||||
#else
|
||||
#define MAXARG_Bx MAX_INT
|
||||
#define MAXARG_sBx MAX_INT
|
||||
#endif
|
||||
|
||||
|
||||
#define MAXARG_A ((1<<SIZE_A)-1)
|
||||
#define MAXARG_B ((1<<SIZE_B)-1)
|
||||
#define MAXARG_C ((1<<SIZE_C)-1)
|
||||
|
||||
|
||||
/* creates a mask with `n' 1 bits at position `p' */
|
||||
#define MASK1(n,p) ((~((~(Instruction)0)<<n))<<p)
|
||||
|
||||
/* creates a mask with `n' 0 bits at position `p' */
|
||||
#define MASK0(n,p) (~MASK1(n,p))
|
||||
|
||||
/*
|
||||
** the following macros help to manipulate instructions
|
||||
*/
|
||||
|
||||
#define GET_OPCODE(i) (cast(OpCode, ((i)>>POS_OP) & MASK1(SIZE_OP,0)))
|
||||
#define SET_OPCODE(i,o) ((i) = (((i)&MASK0(SIZE_OP,POS_OP)) | \
|
||||
((cast(Instruction, o)<<POS_OP)&MASK1(SIZE_OP,POS_OP))))
|
||||
|
||||
#define GETARG_A(i) (cast(int, ((i)>>POS_A) & MASK1(SIZE_A,0)))
|
||||
#define SETARG_A(i,u) ((i) = (((i)&MASK0(SIZE_A,POS_A)) | \
|
||||
((cast(Instruction, u)<<POS_A)&MASK1(SIZE_A,POS_A))))
|
||||
|
||||
#define GETARG_B(i) (cast(int, ((i)>>POS_B) & MASK1(SIZE_B,0)))
|
||||
#define SETARG_B(i,b) ((i) = (((i)&MASK0(SIZE_B,POS_B)) | \
|
||||
((cast(Instruction, b)<<POS_B)&MASK1(SIZE_B,POS_B))))
|
||||
|
||||
#define GETARG_C(i) (cast(int, ((i)>>POS_C) & MASK1(SIZE_C,0)))
|
||||
#define SETARG_C(i,b) ((i) = (((i)&MASK0(SIZE_C,POS_C)) | \
|
||||
((cast(Instruction, b)<<POS_C)&MASK1(SIZE_C,POS_C))))
|
||||
|
||||
#define GETARG_Bx(i) (cast(int, ((i)>>POS_Bx) & MASK1(SIZE_Bx,0)))
|
||||
#define SETARG_Bx(i,b) ((i) = (((i)&MASK0(SIZE_Bx,POS_Bx)) | \
|
||||
((cast(Instruction, b)<<POS_Bx)&MASK1(SIZE_Bx,POS_Bx))))
|
||||
|
||||
#define GETARG_sBx(i) (GETARG_Bx(i)-MAXARG_sBx)
|
||||
#define SETARG_sBx(i,b) SETARG_Bx((i),cast(unsigned int, (b)+MAXARG_sBx))
|
||||
|
||||
|
||||
#define CREATE_ABC(o,a,b,c) ((cast(Instruction, o)<<POS_OP) \
|
||||
| (cast(Instruction, a)<<POS_A) \
|
||||
| (cast(Instruction, b)<<POS_B) \
|
||||
| (cast(Instruction, c)<<POS_C))
|
||||
|
||||
#define CREATE_ABx(o,a,bc) ((cast(Instruction, o)<<POS_OP) \
|
||||
| (cast(Instruction, a)<<POS_A) \
|
||||
| (cast(Instruction, bc)<<POS_Bx))
|
||||
|
||||
|
||||
/*
|
||||
** Macros to operate RK indices
|
||||
*/
|
||||
|
||||
/* this bit 1 means constant (0 means register) */
|
||||
#define BITRK (1 << (SIZE_B - 1))
|
||||
|
||||
/* test whether value is a constant */
|
||||
#define ISK(x) ((x) & BITRK)
|
||||
|
||||
/* gets the index of the constant */
|
||||
#define INDEXK(r) ((int)(r) & ~BITRK)
|
||||
|
||||
#define MAXINDEXRK (BITRK - 1)
|
||||
|
||||
/* code a constant index as a RK value */
|
||||
#define RKASK(x) ((x) | BITRK)
|
||||
|
||||
|
||||
/*
|
||||
** invalid register that fits in 8 bits
|
||||
*/
|
||||
#define NO_REG MAXARG_A
|
||||
|
||||
|
||||
/*
|
||||
** R(x) - register
|
||||
** Kst(x) - constant (in constant table)
|
||||
** RK(x) == if ISK(x) then Kst(INDEXK(x)) else R(x)
|
||||
*/
|
||||
|
||||
|
||||
/*
|
||||
** grep "ORDER OP" if you change these enums
|
||||
*/
|
||||
|
||||
typedef enum {
|
||||
/*----------------------------------------------------------------------
|
||||
name args description
|
||||
------------------------------------------------------------------------*/
|
||||
OP_MOVE,/* A B R(A) := R(B) */
|
||||
OP_LOADK,/* A Bx R(A) := Kst(Bx) */
|
||||
OP_LOADBOOL,/* A B C R(A) := (Bool)B; if (C) pc++ */
|
||||
OP_LOADNIL,/* A B R(A) := ... := R(B) := nil */
|
||||
OP_GETUPVAL,/* A B R(A) := UpValue[B] */
|
||||
|
||||
OP_GETGLOBAL,/* A Bx R(A) := Gbl[Kst(Bx)] */
|
||||
OP_GETTABLE,/* A B C R(A) := R(B)[RK(C)] */
|
||||
|
||||
OP_SETGLOBAL,/* A Bx Gbl[Kst(Bx)] := R(A) */
|
||||
OP_SETUPVAL,/* A B UpValue[B] := R(A) */
|
||||
OP_SETTABLE,/* A B C R(A)[RK(B)] := RK(C) */
|
||||
|
||||
OP_NEWTABLE,/* A B C R(A) := {} (size = B,C) */
|
||||
|
||||
OP_SELF,/* A B C R(A+1) := R(B); R(A) := R(B)[RK(C)] */
|
||||
|
||||
OP_ADD,/* A B C R(A) := RK(B) + RK(C) */
|
||||
OP_SUB,/* A B C R(A) := RK(B) - RK(C) */
|
||||
OP_MUL,/* A B C R(A) := RK(B) * RK(C) */
|
||||
OP_DIV,/* A B C R(A) := RK(B) / RK(C) */
|
||||
OP_MOD,/* A B C R(A) := RK(B) % RK(C) */
|
||||
OP_POW,/* A B C R(A) := RK(B) ^ RK(C) */
|
||||
OP_UNM,/* A B R(A) := -R(B) */
|
||||
OP_NOT,/* A B R(A) := not R(B) */
|
||||
OP_LEN,/* A B R(A) := length of R(B) */
|
||||
|
||||
OP_CONCAT,/* A B C R(A) := R(B).. ... ..R(C) */
|
||||
|
||||
OP_JMP,/* sBx pc+=sBx */
|
||||
|
||||
OP_EQ,/* A B C if ((RK(B) == RK(C)) ~= A) then pc++ */
|
||||
OP_LT,/* A B C if ((RK(B) < RK(C)) ~= A) then pc++ */
|
||||
OP_LE,/* A B C if ((RK(B) <= RK(C)) ~= A) then pc++ */
|
||||
|
||||
OP_TEST,/* A C if not (R(A) <=> C) then pc++ */
|
||||
OP_TESTSET,/* A B C if (R(B) <=> C) then R(A) := R(B) else pc++ */
|
||||
|
||||
OP_CALL,/* A B C R(A), ... ,R(A+C-2) := R(A)(R(A+1), ... ,R(A+B-1)) */
|
||||
OP_TAILCALL,/* A B C return R(A)(R(A+1), ... ,R(A+B-1)) */
|
||||
OP_RETURN,/* A B return R(A), ... ,R(A+B-2) (see note) */
|
||||
|
||||
OP_FORLOOP,/* A sBx R(A)+=R(A+2);
|
||||
if R(A) <?= R(A+1) then { pc+=sBx; R(A+3)=R(A) }*/
|
||||
OP_FORPREP,/* A sBx R(A)-=R(A+2); pc+=sBx */
|
||||
|
||||
OP_TFORLOOP,/* A C R(A+3), ... ,R(A+2+C) := R(A)(R(A+1), R(A+2));
|
||||
if R(A+3) ~= nil then R(A+2)=R(A+3) else pc++ */
|
||||
OP_SETLIST,/* A B C R(A)[(C-1)*FPF+i] := R(A+i), 1 <= i <= B */
|
||||
|
||||
OP_CLOSE,/* A close all variables in the stack up to (>=) R(A)*/
|
||||
OP_CLOSURE,/* A Bx R(A) := closure(KPROTO[Bx], R(A), ... ,R(A+n)) */
|
||||
|
||||
OP_VARARG/* A B R(A), R(A+1), ..., R(A+B-1) = vararg */
|
||||
} OpCode;
|
||||
|
||||
|
||||
#define NUM_OPCODES (cast(int, OP_VARARG) + 1)
|
||||
|
||||
|
||||
|
||||
/*===========================================================================
|
||||
Notes:
|
||||
(*) In OP_CALL, if (B == 0) then B = top. C is the number of returns - 1,
|
||||
and can be 0: OP_CALL then sets `top' to last_result+1, so
|
||||
next open instruction (OP_CALL, OP_RETURN, OP_SETLIST) may use `top'.
|
||||
|
||||
(*) In OP_VARARG, if (B == 0) then use actual number of varargs and
|
||||
set top (like in OP_CALL with C == 0).
|
||||
|
||||
(*) In OP_RETURN, if (B == 0) then return up to `top'
|
||||
|
||||
(*) In OP_SETLIST, if (B == 0) then B = `top';
|
||||
if (C == 0) then next `instruction' is real C
|
||||
|
||||
(*) For comparisons, A specifies what condition the test should accept
|
||||
(true or false).
|
||||
|
||||
(*) All `skips' (pc++) assume that next instruction is a jump
|
||||
===========================================================================*/
|
||||
|
||||
|
||||
/*
|
||||
** masks for instruction properties. The format is:
|
||||
** bits 0-1: op mode
|
||||
** bits 2-3: C arg mode
|
||||
** bits 4-5: B arg mode
|
||||
** bit 6: instruction set register A
|
||||
** bit 7: operator is a test
|
||||
*/
|
||||
|
||||
enum OpArgMask {
|
||||
OpArgN, /* argument is not used */
|
||||
OpArgU, /* argument is used */
|
||||
OpArgR, /* argument is a register or a jump offset */
|
||||
OpArgK /* argument is a constant or register/constant */
|
||||
};
|
||||
|
||||
LUAI_DATA const lu_byte luaP_opmodes[NUM_OPCODES];
|
||||
|
||||
#define getOpMode(m) (cast(enum OpMode, luaP_opmodes[m] & 3))
|
||||
#define getBMode(m) (cast(enum OpArgMask, (luaP_opmodes[m] >> 4) & 3))
|
||||
#define getCMode(m) (cast(enum OpArgMask, (luaP_opmodes[m] >> 2) & 3))
|
||||
#define testAMode(m) (luaP_opmodes[m] & (1 << 6))
|
||||
#define testTMode(m) (luaP_opmodes[m] & (1 << 7))
|
||||
|
||||
|
||||
LUAI_DATA const char *const luaP_opnames[NUM_OPCODES+1]; /* opcode names */
|
||||
|
||||
|
||||
/* number of list items to accumulate before a SETLIST instruction */
|
||||
#define LFIELDS_PER_FLUSH 50
|
||||
|
||||
|
||||
#endif
|
243
src/lua/loslib.c
243
src/lua/loslib.c
|
@ -1,243 +0,0 @@
|
|||
/*
|
||||
** $Id: loslib.c,v 1.19.1.3 2008/01/18 16:38:18 roberto Exp $
|
||||
** Standard Operating System library
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <errno.h>
|
||||
#include <locale.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <time.h>
|
||||
|
||||
#define loslib_c
|
||||
#define LUA_LIB
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lauxlib.h"
|
||||
#include "lualib.h"
|
||||
|
||||
|
||||
static int os_pushresult (lua_State *L, int i, const char *filename) {
|
||||
int en = errno; /* calls to Lua API may change this value */
|
||||
if (i) {
|
||||
lua_pushboolean(L, 1);
|
||||
return 1;
|
||||
}
|
||||
else {
|
||||
lua_pushnil(L);
|
||||
lua_pushfstring(L, "%s: %s", filename, strerror(en));
|
||||
lua_pushinteger(L, en);
|
||||
return 3;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int os_execute (lua_State *L) {
|
||||
lua_pushinteger(L, system(luaL_optstring(L, 1, NULL)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int os_remove (lua_State *L) {
|
||||
const char *filename = luaL_checkstring(L, 1);
|
||||
return os_pushresult(L, remove(filename) == 0, filename);
|
||||
}
|
||||
|
||||
|
||||
static int os_rename (lua_State *L) {
|
||||
const char *fromname = luaL_checkstring(L, 1);
|
||||
const char *toname = luaL_checkstring(L, 2);
|
||||
return os_pushresult(L, rename(fromname, toname) == 0, fromname);
|
||||
}
|
||||
|
||||
|
||||
static int os_tmpname (lua_State *L) {
|
||||
char buff[LUA_TMPNAMBUFSIZE];
|
||||
int err;
|
||||
lua_tmpnam(buff, err);
|
||||
if (err)
|
||||
return luaL_error(L, "unable to generate a unique filename");
|
||||
lua_pushstring(L, buff);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int os_getenv (lua_State *L) {
|
||||
lua_pushstring(L, getenv(luaL_checkstring(L, 1))); /* if NULL push nil */
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int os_clock (lua_State *L) {
|
||||
lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** Time/Date operations
|
||||
** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,
|
||||
** wday=%w+1, yday=%j, isdst=? }
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
static void setfield (lua_State *L, const char *key, int value) {
|
||||
lua_pushinteger(L, value);
|
||||
lua_setfield(L, -2, key);
|
||||
}
|
||||
|
||||
static void setboolfield (lua_State *L, const char *key, int value) {
|
||||
if (value < 0) /* undefined? */
|
||||
return; /* does not set field */
|
||||
lua_pushboolean(L, value);
|
||||
lua_setfield(L, -2, key);
|
||||
}
|
||||
|
||||
static int getboolfield (lua_State *L, const char *key) {
|
||||
int res;
|
||||
lua_getfield(L, -1, key);
|
||||
res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);
|
||||
lua_pop(L, 1);
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
static int getfield (lua_State *L, const char *key, int d) {
|
||||
int res;
|
||||
lua_getfield(L, -1, key);
|
||||
if (lua_isnumber(L, -1))
|
||||
res = (int)lua_tointeger(L, -1);
|
||||
else {
|
||||
if (d < 0)
|
||||
return luaL_error(L, "field " LUA_QS " missing in date table", key);
|
||||
res = d;
|
||||
}
|
||||
lua_pop(L, 1);
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
static int os_date (lua_State *L) {
|
||||
const char *s = luaL_optstring(L, 1, "%c");
|
||||
time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));
|
||||
struct tm *stm;
|
||||
if (*s == '!') { /* UTC? */
|
||||
stm = gmtime(&t);
|
||||
s++; /* skip `!' */
|
||||
}
|
||||
else
|
||||
stm = localtime(&t);
|
||||
if (stm == NULL) /* invalid date? */
|
||||
lua_pushnil(L);
|
||||
else if (strcmp(s, "*t") == 0) {
|
||||
lua_createtable(L, 0, 9); /* 9 = number of fields */
|
||||
setfield(L, "sec", stm->tm_sec);
|
||||
setfield(L, "min", stm->tm_min);
|
||||
setfield(L, "hour", stm->tm_hour);
|
||||
setfield(L, "day", stm->tm_mday);
|
||||
setfield(L, "month", stm->tm_mon+1);
|
||||
setfield(L, "year", stm->tm_year+1900);
|
||||
setfield(L, "wday", stm->tm_wday+1);
|
||||
setfield(L, "yday", stm->tm_yday+1);
|
||||
setboolfield(L, "isdst", stm->tm_isdst);
|
||||
}
|
||||
else {
|
||||
char cc[3];
|
||||
luaL_Buffer b;
|
||||
cc[0] = '%'; cc[2] = '\0';
|
||||
luaL_buffinit(L, &b);
|
||||
for (; *s; s++) {
|
||||
if (*s != '%' || *(s + 1) == '\0') /* no conversion specifier? */
|
||||
luaL_addchar(&b, *s);
|
||||
else {
|
||||
size_t reslen;
|
||||
char buff[200]; /* should be big enough for any conversion result */
|
||||
cc[1] = *(++s);
|
||||
reslen = strftime(buff, sizeof(buff), cc, stm);
|
||||
luaL_addlstring(&b, buff, reslen);
|
||||
}
|
||||
}
|
||||
luaL_pushresult(&b);
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int os_time (lua_State *L) {
|
||||
time_t t;
|
||||
if (lua_isnoneornil(L, 1)) /* called without args? */
|
||||
t = time(NULL); /* get current time */
|
||||
else {
|
||||
struct tm ts;
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
lua_settop(L, 1); /* make sure table is at the top */
|
||||
ts.tm_sec = getfield(L, "sec", 0);
|
||||
ts.tm_min = getfield(L, "min", 0);
|
||||
ts.tm_hour = getfield(L, "hour", 12);
|
||||
ts.tm_mday = getfield(L, "day", -1);
|
||||
ts.tm_mon = getfield(L, "month", -1) - 1;
|
||||
ts.tm_year = getfield(L, "year", -1) - 1900;
|
||||
ts.tm_isdst = getboolfield(L, "isdst");
|
||||
t = mktime(&ts);
|
||||
}
|
||||
if (t == (time_t)(-1))
|
||||
lua_pushnil(L);
|
||||
else
|
||||
lua_pushnumber(L, (lua_Number)t);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int os_difftime (lua_State *L) {
|
||||
lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
|
||||
(time_t)(luaL_optnumber(L, 2, 0))));
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
static int os_setlocale (lua_State *L) {
|
||||
static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,
|
||||
LC_NUMERIC, LC_TIME};
|
||||
static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
|
||||
"numeric", "time", NULL};
|
||||
const char *l = luaL_optstring(L, 1, NULL);
|
||||
int op = luaL_checkoption(L, 2, "all", catnames);
|
||||
lua_pushstring(L, setlocale(cat[op], l));
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int os_exit (lua_State *L) {
|
||||
exit(luaL_optint(L, 1, EXIT_SUCCESS));
|
||||
}
|
||||
|
||||
static const luaL_Reg syslib[] = {
|
||||
{"clock", os_clock},
|
||||
{"date", os_date},
|
||||
{"difftime", os_difftime},
|
||||
{"execute", os_execute},
|
||||
{"exit", os_exit},
|
||||
{"getenv", os_getenv},
|
||||
{"remove", os_remove},
|
||||
{"rename", os_rename},
|
||||
{"setlocale", os_setlocale},
|
||||
{"time", os_time},
|
||||
{"tmpname", os_tmpname},
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
|
||||
LUALIB_API int luaopen_os (lua_State *L) {
|
||||
luaL_register(L, LUA_OSLIBNAME, syslib);
|
||||
return 1;
|
||||
}
|
||||
|
1339
src/lua/lparser.c
1339
src/lua/lparser.c
File diff suppressed because it is too large
Load Diff
|
@ -1,82 +0,0 @@
|
|||
/*
|
||||
** $Id: lparser.h,v 1.57.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Lua Parser
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef lparser_h
|
||||
#define lparser_h
|
||||
|
||||
#include "llimits.h"
|
||||
#include "lobject.h"
|
||||
#include "lzio.h"
|
||||
|
||||
|
||||
/*
|
||||
** Expression descriptor
|
||||
*/
|
||||
|
||||
typedef enum {
|
||||
VVOID, /* no value */
|
||||
VNIL,
|
||||
VTRUE,
|
||||
VFALSE,
|
||||
VK, /* info = index of constant in `k' */
|
||||
VKNUM, /* nval = numerical value */
|
||||
VLOCAL, /* info = local register */
|
||||
VUPVAL, /* info = index of upvalue in `upvalues' */
|
||||
VGLOBAL, /* info = index of table; aux = index of global name in `k' */
|
||||
VINDEXED, /* info = table register; aux = index register (or `k') */
|
||||
VJMP, /* info = instruction pc */
|
||||
VRELOCABLE, /* info = instruction pc */
|
||||
VNONRELOC, /* info = result register */
|
||||
VCALL, /* info = instruction pc */
|
||||
VVARARG /* info = instruction pc */
|
||||
} expkind;
|
||||
|
||||
typedef struct expdesc {
|
||||
expkind k;
|
||||
union {
|
||||
struct { int info, aux; } s;
|
||||
lua_Number nval;
|
||||
} u;
|
||||
int t; /* patch list of `exit when true' */
|
||||
int f; /* patch list of `exit when false' */
|
||||
} expdesc;
|
||||
|
||||
|
||||
typedef struct upvaldesc {
|
||||
lu_byte k;
|
||||
lu_byte info;
|
||||
} upvaldesc;
|
||||
|
||||
|
||||
struct BlockCnt; /* defined in lparser.c */
|
||||
|
||||
|
||||
/* state needed to generate code for a given function */
|
||||
typedef struct FuncState {
|
||||
Proto *f; /* current function header */
|
||||
Table *h; /* table to find (and reuse) elements in `k' */
|
||||
struct FuncState *prev; /* enclosing function */
|
||||
struct LexState *ls; /* lexical state */
|
||||
struct lua_State *L; /* copy of the Lua state */
|
||||
struct BlockCnt *bl; /* chain of current blocks */
|
||||
int pc; /* next position to code (equivalent to `ncode') */
|
||||
int lasttarget; /* `pc' of last `jump target' */
|
||||
int jpc; /* list of pending jumps to `pc' */
|
||||
int freereg; /* first free register */
|
||||
int nk; /* number of elements in `k' */
|
||||
int np; /* number of elements in `p' */
|
||||
short nlocvars; /* number of elements in `locvars' */
|
||||
lu_byte nactvar; /* number of active local variables */
|
||||
upvaldesc upvalues[LUAI_MAXUPVALUES]; /* upvalues */
|
||||
unsigned short actvar[LUAI_MAXVARS]; /* declared-variable stack */
|
||||
} FuncState;
|
||||
|
||||
|
||||
LUAI_FUNC Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
|
||||
const char *name);
|
||||
|
||||
|
||||
#endif
|
214
src/lua/lstate.c
214
src/lua/lstate.c
|
@ -1,214 +0,0 @@
|
|||
/*
|
||||
** $Id: lstate.c,v 2.36.1.2 2008/01/03 15:20:39 roberto Exp $
|
||||
** Global State
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <stddef.h>
|
||||
|
||||
#define lstate_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "ldebug.h"
|
||||
#include "ldo.h"
|
||||
#include "lfunc.h"
|
||||
#include "lgc.h"
|
||||
#include "llex.h"
|
||||
#include "lmem.h"
|
||||
#include "lstate.h"
|
||||
#include "lstring.h"
|
||||
#include "ltable.h"
|
||||
#include "ltm.h"
|
||||
|
||||
|
||||
#define state_size(x) (sizeof(x) + LUAI_EXTRASPACE)
|
||||
#define fromstate(l) (cast(lu_byte *, (l)) - LUAI_EXTRASPACE)
|
||||
#define tostate(l) (cast(lua_State *, cast(lu_byte *, l) + LUAI_EXTRASPACE))
|
||||
|
||||
|
||||
/*
|
||||
** Main thread combines a thread state and the global state
|
||||
*/
|
||||
typedef struct LG {
|
||||
lua_State l;
|
||||
global_State g;
|
||||
} LG;
|
||||
|
||||
|
||||
|
||||
static void stack_init (lua_State *L1, lua_State *L) {
|
||||
/* initialize CallInfo array */
|
||||
L1->base_ci = luaM_newvector(L, BASIC_CI_SIZE, CallInfo);
|
||||
L1->ci = L1->base_ci;
|
||||
L1->size_ci = BASIC_CI_SIZE;
|
||||
L1->end_ci = L1->base_ci + L1->size_ci - 1;
|
||||
/* initialize stack array */
|
||||
L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TValue);
|
||||
L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK;
|
||||
L1->top = L1->stack;
|
||||
L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1;
|
||||
/* initialize first ci */
|
||||
L1->ci->func = L1->top;
|
||||
setnilvalue(L1->top++); /* `function' entry for this `ci' */
|
||||
L1->base = L1->ci->base = L1->top;
|
||||
L1->ci->top = L1->top + LUA_MINSTACK;
|
||||
}
|
||||
|
||||
|
||||
static void freestack (lua_State *L, lua_State *L1) {
|
||||
luaM_freearray(L, L1->base_ci, L1->size_ci, CallInfo);
|
||||
luaM_freearray(L, L1->stack, L1->stacksize, TValue);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** open parts that may cause memory-allocation errors
|
||||
*/
|
||||
static void f_luaopen (lua_State *L, void *ud) {
|
||||
global_State *g = G(L);
|
||||
UNUSED(ud);
|
||||
stack_init(L, L); /* init stack */
|
||||
sethvalue(L, gt(L), luaH_new(L, 0, 2)); /* table of globals */
|
||||
sethvalue(L, registry(L), luaH_new(L, 0, 2)); /* registry */
|
||||
luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */
|
||||
luaT_init(L);
|
||||
luaX_init(L);
|
||||
luaS_fix(luaS_newliteral(L, MEMERRMSG));
|
||||
g->GCthreshold = 4*g->totalbytes;
|
||||
}
|
||||
|
||||
|
||||
static void preinit_state (lua_State *L, global_State *g) {
|
||||
G(L) = g;
|
||||
L->stack = NULL;
|
||||
L->stacksize = 0;
|
||||
L->errorJmp = NULL;
|
||||
L->hook = NULL;
|
||||
L->hookmask = 0;
|
||||
L->basehookcount = 0;
|
||||
L->allowhook = 1;
|
||||
resethookcount(L);
|
||||
L->openupval = NULL;
|
||||
L->size_ci = 0;
|
||||
L->nCcalls = L->baseCcalls = 0;
|
||||
L->status = 0;
|
||||
L->base_ci = L->ci = NULL;
|
||||
L->savedpc = NULL;
|
||||
L->errfunc = 0;
|
||||
setnilvalue(gt(L));
|
||||
}
|
||||
|
||||
|
||||
static void close_state (lua_State *L) {
|
||||
global_State *g = G(L);
|
||||
luaF_close(L, L->stack); /* close all upvalues for this thread */
|
||||
luaC_freeall(L); /* collect all objects */
|
||||
lua_assert(g->rootgc == obj2gco(L));
|
||||
lua_assert(g->strt.nuse == 0);
|
||||
luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size, TString *);
|
||||
luaZ_freebuffer(L, &g->buff);
|
||||
freestack(L, L);
|
||||
lua_assert(g->totalbytes == sizeof(LG));
|
||||
(*g->frealloc)(g->ud, fromstate(L), state_size(LG), 0);
|
||||
}
|
||||
|
||||
|
||||
lua_State *luaE_newthread (lua_State *L) {
|
||||
lua_State *L1 = tostate(luaM_malloc(L, state_size(lua_State)));
|
||||
luaC_link(L, obj2gco(L1), LUA_TTHREAD);
|
||||
preinit_state(L1, G(L));
|
||||
stack_init(L1, L); /* init stack */
|
||||
setobj2n(L, gt(L1), gt(L)); /* share table of globals */
|
||||
L1->hookmask = L->hookmask;
|
||||
L1->basehookcount = L->basehookcount;
|
||||
L1->hook = L->hook;
|
||||
resethookcount(L1);
|
||||
lua_assert(iswhite(obj2gco(L1)));
|
||||
return L1;
|
||||
}
|
||||
|
||||
|
||||
void luaE_freethread (lua_State *L, lua_State *L1) {
|
||||
luaF_close(L1, L1->stack); /* close all upvalues for this thread */
|
||||
lua_assert(L1->openupval == NULL);
|
||||
luai_userstatefree(L1);
|
||||
freestack(L, L1);
|
||||
luaM_freemem(L, fromstate(L1), state_size(lua_State));
|
||||
}
|
||||
|
||||
|
||||
LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
|
||||
int i;
|
||||
lua_State *L;
|
||||
global_State *g;
|
||||
void *l = (*f)(ud, NULL, 0, state_size(LG));
|
||||
if (l == NULL) return NULL;
|
||||
L = tostate(l);
|
||||
g = &((LG *)L)->g;
|
||||
L->next = NULL;
|
||||
L->tt = LUA_TTHREAD;
|
||||
g->currentwhite = bit2mask(WHITE0BIT, FIXEDBIT);
|
||||
L->marked = luaC_white(g);
|
||||
set2bits(L->marked, FIXEDBIT, SFIXEDBIT);
|
||||
preinit_state(L, g);
|
||||
g->frealloc = f;
|
||||
g->ud = ud;
|
||||
g->mainthread = L;
|
||||
g->uvhead.u.l.prev = &g->uvhead;
|
||||
g->uvhead.u.l.next = &g->uvhead;
|
||||
g->GCthreshold = 0; /* mark it as unfinished state */
|
||||
g->strt.size = 0;
|
||||
g->strt.nuse = 0;
|
||||
g->strt.hash = NULL;
|
||||
setnilvalue(registry(L));
|
||||
luaZ_initbuffer(L, &g->buff);
|
||||
g->panic = NULL;
|
||||
g->gcstate = GCSpause;
|
||||
g->rootgc = obj2gco(L);
|
||||
g->sweepstrgc = 0;
|
||||
g->sweepgc = &g->rootgc;
|
||||
g->gray = NULL;
|
||||
g->grayagain = NULL;
|
||||
g->weak = NULL;
|
||||
g->tmudata = NULL;
|
||||
g->totalbytes = sizeof(LG);
|
||||
g->gcpause = LUAI_GCPAUSE;
|
||||
g->gcstepmul = LUAI_GCMUL;
|
||||
g->gcdept = 0;
|
||||
for (i=0; i<NUM_TAGS; i++) g->mt[i] = NULL;
|
||||
if (luaD_rawrunprotected(L, f_luaopen, NULL) != 0) {
|
||||
/* memory allocation error: free partial state */
|
||||
close_state(L);
|
||||
L = NULL;
|
||||
}
|
||||
else
|
||||
luai_userstateopen(L);
|
||||
return L;
|
||||
}
|
||||
|
||||
|
||||
static void callallgcTM (lua_State *L, void *ud) {
|
||||
UNUSED(ud);
|
||||
luaC_callGCTM(L); /* call GC metamethods for all udata */
|
||||
}
|
||||
|
||||
|
||||
LUA_API void lua_close (lua_State *L) {
|
||||
L = G(L)->mainthread; /* only the main thread can be closed */
|
||||
lua_lock(L);
|
||||
luaF_close(L, L->stack); /* close all upvalues for this thread */
|
||||
luaC_separateudata(L, 1); /* separate udata that have GC metamethods */
|
||||
L->errfunc = 0; /* no error function during GC metamethods */
|
||||
do { /* repeat until no more errors */
|
||||
L->ci = L->base_ci;
|
||||
L->base = L->top = L->ci->base;
|
||||
L->nCcalls = L->baseCcalls = 0;
|
||||
} while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);
|
||||
lua_assert(G(L)->tmudata == NULL);
|
||||
luai_userstateclose(L);
|
||||
close_state(L);
|
||||
}
|
||||
|
169
src/lua/lstate.h
169
src/lua/lstate.h
|
@ -1,169 +0,0 @@
|
|||
/*
|
||||
** $Id: lstate.h,v 2.24.1.2 2008/01/03 15:20:39 roberto Exp $
|
||||
** Global State
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef lstate_h
|
||||
#define lstate_h
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lobject.h"
|
||||
#include "ltm.h"
|
||||
#include "lzio.h"
|
||||
|
||||
|
||||
|
||||
struct lua_longjmp; /* defined in ldo.c */
|
||||
|
||||
|
||||
/* table of globals */
|
||||
#define gt(L) (&L->l_gt)
|
||||
|
||||
/* registry */
|
||||
#define registry(L) (&G(L)->l_registry)
|
||||
|
||||
|
||||
/* extra stack space to handle TM calls and some other extras */
|
||||
#define EXTRA_STACK 5
|
||||
|
||||
|
||||
#define BASIC_CI_SIZE 8
|
||||
|
||||
#define BASIC_STACK_SIZE (2*LUA_MINSTACK)
|
||||
|
||||
|
||||
|
||||
typedef struct stringtable {
|
||||
GCObject **hash;
|
||||
lu_int32 nuse; /* number of elements */
|
||||
int size;
|
||||
} stringtable;
|
||||
|
||||
|
||||
/*
|
||||
** informations about a call
|
||||
*/
|
||||
typedef struct CallInfo {
|
||||
StkId base; /* base for this function */
|
||||
StkId func; /* function index in the stack */
|
||||
StkId top; /* top for this function */
|
||||
const Instruction *savedpc;
|
||||
int nresults; /* expected number of results from this function */
|
||||
int tailcalls; /* number of tail calls lost under this entry */
|
||||
} CallInfo;
|
||||
|
||||
|
||||
|
||||
#define curr_func(L) (clvalue(L->ci->func))
|
||||
#define ci_func(ci) (clvalue((ci)->func))
|
||||
#define f_isLua(ci) (!ci_func(ci)->c.isC)
|
||||
#define isLua(ci) (ttisfunction((ci)->func) && f_isLua(ci))
|
||||
|
||||
|
||||
/*
|
||||
** `global state', shared by all threads of this state
|
||||
*/
|
||||
typedef struct global_State {
|
||||
stringtable strt; /* hash table for strings */
|
||||
lua_Alloc frealloc; /* function to reallocate memory */
|
||||
void *ud; /* auxiliary data to `frealloc' */
|
||||
lu_byte currentwhite;
|
||||
lu_byte gcstate; /* state of garbage collector */
|
||||
int sweepstrgc; /* position of sweep in `strt' */
|
||||
GCObject *rootgc; /* list of all collectable objects */
|
||||
GCObject **sweepgc; /* position of sweep in `rootgc' */
|
||||
GCObject *gray; /* list of gray objects */
|
||||
GCObject *grayagain; /* list of objects to be traversed atomically */
|
||||
GCObject *weak; /* list of weak tables (to be cleared) */
|
||||
GCObject *tmudata; /* last element of list of userdata to be GC */
|
||||
Mbuffer buff; /* temporary buffer for string concatentation */
|
||||
lu_mem GCthreshold;
|
||||
lu_mem totalbytes; /* number of bytes currently allocated */
|
||||
lu_mem estimate; /* an estimate of number of bytes actually in use */
|
||||
lu_mem gcdept; /* how much GC is `behind schedule' */
|
||||
int gcpause; /* size of pause between successive GCs */
|
||||
int gcstepmul; /* GC `granularity' */
|
||||
lua_CFunction panic; /* to be called in unprotected errors */
|
||||
TValue l_registry;
|
||||
struct lua_State *mainthread;
|
||||
UpVal uvhead; /* head of double-linked list of all open upvalues */
|
||||
struct Table *mt[NUM_TAGS]; /* metatables for basic types */
|
||||
TString *tmname[TM_N]; /* array with tag-method names */
|
||||
} global_State;
|
||||
|
||||
|
||||
/*
|
||||
** `per thread' state
|
||||
*/
|
||||
struct lua_State {
|
||||
CommonHeader;
|
||||
lu_byte status;
|
||||
StkId top; /* first free slot in the stack */
|
||||
StkId base; /* base of current function */
|
||||
global_State *l_G;
|
||||
CallInfo *ci; /* call info for current function */
|
||||
const Instruction *savedpc; /* `savedpc' of current function */
|
||||
StkId stack_last; /* last free slot in the stack */
|
||||
StkId stack; /* stack base */
|
||||
CallInfo *end_ci; /* points after end of ci array*/
|
||||
CallInfo *base_ci; /* array of CallInfo's */
|
||||
int stacksize;
|
||||
int size_ci; /* size of array `base_ci' */
|
||||
unsigned short nCcalls; /* number of nested C calls */
|
||||
unsigned short baseCcalls; /* nested C calls when resuming coroutine */
|
||||
lu_byte hookmask;
|
||||
lu_byte allowhook;
|
||||
int basehookcount;
|
||||
int hookcount;
|
||||
lua_Hook hook;
|
||||
TValue l_gt; /* table of globals */
|
||||
TValue env; /* temporary place for environments */
|
||||
GCObject *openupval; /* list of open upvalues in this stack */
|
||||
GCObject *gclist;
|
||||
struct lua_longjmp *errorJmp; /* current error recover point */
|
||||
ptrdiff_t errfunc; /* current error handling function (stack index) */
|
||||
};
|
||||
|
||||
|
||||
#define G(L) (L->l_G)
|
||||
|
||||
|
||||
/*
|
||||
** Union of all collectable objects
|
||||
*/
|
||||
union GCObject {
|
||||
GCheader gch;
|
||||
union TString ts;
|
||||
union Udata u;
|
||||
union Closure cl;
|
||||
struct Table h;
|
||||
struct Proto p;
|
||||
struct UpVal uv;
|
||||
struct lua_State th; /* thread */
|
||||
};
|
||||
|
||||
|
||||
/* macros to convert a GCObject into a specific value */
|
||||
#define rawgco2ts(o) check_exp((o)->gch.tt == LUA_TSTRING, &((o)->ts))
|
||||
#define gco2ts(o) (&rawgco2ts(o)->tsv)
|
||||
#define rawgco2u(o) check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u))
|
||||
#define gco2u(o) (&rawgco2u(o)->uv)
|
||||
#define gco2cl(o) check_exp((o)->gch.tt == LUA_TFUNCTION, &((o)->cl))
|
||||
#define gco2h(o) check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h))
|
||||
#define gco2p(o) check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p))
|
||||
#define gco2uv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv))
|
||||
#define ngcotouv(o) \
|
||||
check_exp((o) == NULL || (o)->gch.tt == LUA_TUPVAL, &((o)->uv))
|
||||
#define gco2th(o) check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th))
|
||||
|
||||
/* macro to convert any Lua object into a GCObject */
|
||||
#define obj2gco(v) (cast(GCObject *, (v)))
|
||||
|
||||
|
||||
LUAI_FUNC lua_State *luaE_newthread (lua_State *L);
|
||||
LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
|
||||
|
||||
#endif
|
||||
|
|
@ -1,111 +0,0 @@
|
|||
/*
|
||||
** $Id: lstring.c,v 2.8.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** String table (keeps all strings handled by Lua)
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <string.h>
|
||||
|
||||
#define lstring_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lmem.h"
|
||||
#include "lobject.h"
|
||||
#include "lstate.h"
|
||||
#include "lstring.h"
|
||||
|
||||
|
||||
|
||||
void luaS_resize (lua_State *L, int newsize) {
|
||||
GCObject **newhash;
|
||||
stringtable *tb;
|
||||
int i;
|
||||
if (G(L)->gcstate == GCSsweepstring)
|
||||
return; /* cannot resize during GC traverse */
|
||||
newhash = luaM_newvector(L, newsize, GCObject *);
|
||||
tb = &G(L)->strt;
|
||||
for (i=0; i<newsize; i++) newhash[i] = NULL;
|
||||
/* rehash */
|
||||
for (i=0; i<tb->size; i++) {
|
||||
GCObject *p = tb->hash[i];
|
||||
while (p) { /* for each node in the list */
|
||||
GCObject *next = p->gch.next; /* save next */
|
||||
unsigned int h = gco2ts(p)->hash;
|
||||
int h1 = lmod(h, newsize); /* new position */
|
||||
lua_assert(cast_int(h%newsize) == lmod(h, newsize));
|
||||
p->gch.next = newhash[h1]; /* chain it */
|
||||
newhash[h1] = p;
|
||||
p = next;
|
||||
}
|
||||
}
|
||||
luaM_freearray(L, tb->hash, tb->size, TString *);
|
||||
tb->size = newsize;
|
||||
tb->hash = newhash;
|
||||
}
|
||||
|
||||
|
||||
static TString *newlstr (lua_State *L, const char *str, size_t l,
|
||||
unsigned int h) {
|
||||
TString *ts;
|
||||
stringtable *tb;
|
||||
if (l+1 > (MAX_SIZET - sizeof(TString))/sizeof(char))
|
||||
luaM_toobig(L);
|
||||
ts = cast(TString *, luaM_malloc(L, (l+1)*sizeof(char)+sizeof(TString)));
|
||||
ts->tsv.len = l;
|
||||
ts->tsv.hash = h;
|
||||
ts->tsv.marked = luaC_white(G(L));
|
||||
ts->tsv.tt = LUA_TSTRING;
|
||||
ts->tsv.reserved = 0;
|
||||
memcpy(ts+1, str, l*sizeof(char));
|
||||
((char *)(ts+1))[l] = '\0'; /* ending 0 */
|
||||
tb = &G(L)->strt;
|
||||
h = lmod(h, tb->size);
|
||||
ts->tsv.next = tb->hash[h]; /* chain new entry */
|
||||
tb->hash[h] = obj2gco(ts);
|
||||
tb->nuse++;
|
||||
if (tb->nuse > cast(lu_int32, tb->size) && tb->size <= MAX_INT/2)
|
||||
luaS_resize(L, tb->size*2); /* too crowded */
|
||||
return ts;
|
||||
}
|
||||
|
||||
|
||||
TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
|
||||
GCObject *o;
|
||||
unsigned int h = cast(unsigned int, l); /* seed */
|
||||
size_t step = (l>>5)+1; /* if string is too long, don't hash all its chars */
|
||||
size_t l1;
|
||||
for (l1=l; l1>=step; l1-=step) /* compute hash */
|
||||
h = h ^ ((h<<5)+(h>>2)+cast(unsigned char, str[l1-1]));
|
||||
for (o = G(L)->strt.hash[lmod(h, G(L)->strt.size)];
|
||||
o != NULL;
|
||||
o = o->gch.next) {
|
||||
TString *ts = rawgco2ts(o);
|
||||
if (ts->tsv.len == l && (memcmp(str, getstr(ts), l) == 0)) {
|
||||
/* string may be dead */
|
||||
if (isdead(G(L), o)) changewhite(o);
|
||||
return ts;
|
||||
}
|
||||
}
|
||||
return newlstr(L, str, l, h); /* not found */
|
||||
}
|
||||
|
||||
|
||||
Udata *luaS_newudata (lua_State *L, size_t s, Table *e) {
|
||||
Udata *u;
|
||||
if (s > MAX_SIZET - sizeof(Udata))
|
||||
luaM_toobig(L);
|
||||
u = cast(Udata *, luaM_malloc(L, s + sizeof(Udata)));
|
||||
u->uv.marked = luaC_white(G(L)); /* is not finalized */
|
||||
u->uv.tt = LUA_TUSERDATA;
|
||||
u->uv.len = s;
|
||||
u->uv.metatable = NULL;
|
||||
u->uv.env = e;
|
||||
/* chain it on udata list (after main thread) */
|
||||
u->uv.next = G(L)->mainthread->next;
|
||||
G(L)->mainthread->next = obj2gco(u);
|
||||
return u;
|
||||
}
|
||||
|
|
@ -1,31 +0,0 @@
|
|||
/*
|
||||
** $Id: lstring.h,v 1.43.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** String table (keep all strings handled by Lua)
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef lstring_h
|
||||
#define lstring_h
|
||||
|
||||
|
||||
#include "lgc.h"
|
||||
#include "lobject.h"
|
||||
#include "lstate.h"
|
||||
|
||||
|
||||
#define sizestring(s) (sizeof(union TString)+((s)->len+1)*sizeof(char))
|
||||
|
||||
#define sizeudata(u) (sizeof(union Udata)+(u)->len)
|
||||
|
||||
#define luaS_new(L, s) (luaS_newlstr(L, s, strlen(s)))
|
||||
#define luaS_newliteral(L, s) (luaS_newlstr(L, "" s, \
|
||||
(sizeof(s)/sizeof(char))-1))
|
||||
|
||||
#define luaS_fix(s) l_setbit((s)->tsv.marked, FIXEDBIT)
|
||||
|
||||
LUAI_FUNC void luaS_resize (lua_State *L, int newsize);
|
||||
LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, Table *e);
|
||||
LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
|
||||
|
||||
|
||||
#endif
|
|
@ -1,871 +0,0 @@
|
|||
/*
|
||||
** $Id: lstrlib.c,v 1.132.1.5 2010/05/14 15:34:19 roberto Exp $
|
||||
** Standard library for string operations and pattern-matching
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <ctype.h>
|
||||
#include <stddef.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#define lstrlib_c
|
||||
#define LUA_LIB
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lauxlib.h"
|
||||
#include "lualib.h"
|
||||
|
||||
|
||||
/* macro to `unsign' a character */
|
||||
#define uchar(c) ((unsigned char)(c))
|
||||
|
||||
|
||||
|
||||
static int str_len (lua_State *L) {
|
||||
size_t l;
|
||||
luaL_checklstring(L, 1, &l);
|
||||
lua_pushinteger(L, l);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static ptrdiff_t posrelat (ptrdiff_t pos, size_t len) {
|
||||
/* relative string position: negative means back from end */
|
||||
if (pos < 0) pos += (ptrdiff_t)len + 1;
|
||||
return (pos >= 0) ? pos : 0;
|
||||
}
|
||||
|
||||
|
||||
static int str_sub (lua_State *L) {
|
||||
size_t l;
|
||||
const char *s = luaL_checklstring(L, 1, &l);
|
||||
ptrdiff_t start = posrelat(luaL_checkinteger(L, 2), l);
|
||||
ptrdiff_t end = posrelat(luaL_optinteger(L, 3, -1), l);
|
||||
if (start < 1) start = 1;
|
||||
if (end > (ptrdiff_t)l) end = (ptrdiff_t)l;
|
||||
if (start <= end)
|
||||
lua_pushlstring(L, s+start-1, end-start+1);
|
||||
else lua_pushliteral(L, "");
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int str_reverse (lua_State *L) {
|
||||
size_t l;
|
||||
luaL_Buffer b;
|
||||
const char *s = luaL_checklstring(L, 1, &l);
|
||||
luaL_buffinit(L, &b);
|
||||
while (l--) luaL_addchar(&b, s[l]);
|
||||
luaL_pushresult(&b);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int str_lower (lua_State *L) {
|
||||
size_t l;
|
||||
size_t i;
|
||||
luaL_Buffer b;
|
||||
const char *s = luaL_checklstring(L, 1, &l);
|
||||
luaL_buffinit(L, &b);
|
||||
for (i=0; i<l; i++)
|
||||
luaL_addchar(&b, tolower(uchar(s[i])));
|
||||
luaL_pushresult(&b);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int str_upper (lua_State *L) {
|
||||
size_t l;
|
||||
size_t i;
|
||||
luaL_Buffer b;
|
||||
const char *s = luaL_checklstring(L, 1, &l);
|
||||
luaL_buffinit(L, &b);
|
||||
for (i=0; i<l; i++)
|
||||
luaL_addchar(&b, toupper(uchar(s[i])));
|
||||
luaL_pushresult(&b);
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int str_rep (lua_State *L) {
|
||||
size_t l;
|
||||
luaL_Buffer b;
|
||||
const char *s = luaL_checklstring(L, 1, &l);
|
||||
int n = luaL_checkint(L, 2);
|
||||
luaL_buffinit(L, &b);
|
||||
while (n-- > 0)
|
||||
luaL_addlstring(&b, s, l);
|
||||
luaL_pushresult(&b);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int str_byte (lua_State *L) {
|
||||
size_t l;
|
||||
const char *s = luaL_checklstring(L, 1, &l);
|
||||
ptrdiff_t posi = posrelat(luaL_optinteger(L, 2, 1), l);
|
||||
ptrdiff_t pose = posrelat(luaL_optinteger(L, 3, posi), l);
|
||||
int n, i;
|
||||
if (posi <= 0) posi = 1;
|
||||
if ((size_t)pose > l) pose = l;
|
||||
if (posi > pose) return 0; /* empty interval; return no values */
|
||||
n = (int)(pose - posi + 1);
|
||||
if (posi + n <= pose) /* overflow? */
|
||||
luaL_error(L, "string slice too long");
|
||||
luaL_checkstack(L, n, "string slice too long");
|
||||
for (i=0; i<n; i++)
|
||||
lua_pushinteger(L, uchar(s[posi+i-1]));
|
||||
return n;
|
||||
}
|
||||
|
||||
|
||||
static int str_char (lua_State *L) {
|
||||
int n = lua_gettop(L); /* number of arguments */
|
||||
int i;
|
||||
luaL_Buffer b;
|
||||
luaL_buffinit(L, &b);
|
||||
for (i=1; i<=n; i++) {
|
||||
int c = luaL_checkint(L, i);
|
||||
luaL_argcheck(L, uchar(c) == c, i, "invalid value");
|
||||
luaL_addchar(&b, uchar(c));
|
||||
}
|
||||
luaL_pushresult(&b);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int writer (lua_State *L, const void* b, size_t size, void* B) {
|
||||
(void)L;
|
||||
luaL_addlstring((luaL_Buffer*) B, (const char *)b, size);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int str_dump (lua_State *L) {
|
||||
luaL_Buffer b;
|
||||
luaL_checktype(L, 1, LUA_TFUNCTION);
|
||||
lua_settop(L, 1);
|
||||
luaL_buffinit(L,&b);
|
||||
if (lua_dump(L, writer, &b) != 0)
|
||||
luaL_error(L, "unable to dump given function");
|
||||
luaL_pushresult(&b);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** PATTERN MATCHING
|
||||
** =======================================================
|
||||
*/
|
||||
|
||||
|
||||
#define CAP_UNFINISHED (-1)
|
||||
#define CAP_POSITION (-2)
|
||||
|
||||
typedef struct MatchState {
|
||||
const char *src_init; /* init of source string */
|
||||
const char *src_end; /* end (`\0') of source string */
|
||||
lua_State *L;
|
||||
int level; /* total number of captures (finished or unfinished) */
|
||||
struct {
|
||||
const char *init;
|
||||
ptrdiff_t len;
|
||||
} capture[LUA_MAXCAPTURES];
|
||||
} MatchState;
|
||||
|
||||
|
||||
#define L_ESC '%'
|
||||
#define SPECIALS "^$*+?.([%-"
|
||||
|
||||
|
||||
static int check_capture (MatchState *ms, int l) {
|
||||
l -= '1';
|
||||
if (l < 0 || l >= ms->level || ms->capture[l].len == CAP_UNFINISHED)
|
||||
return luaL_error(ms->L, "invalid capture index");
|
||||
return l;
|
||||
}
|
||||
|
||||
|
||||
static int capture_to_close (MatchState *ms) {
|
||||
int level = ms->level;
|
||||
for (level--; level>=0; level--)
|
||||
if (ms->capture[level].len == CAP_UNFINISHED) return level;
|
||||
return luaL_error(ms->L, "invalid pattern capture");
|
||||
}
|
||||
|
||||
|
||||
static const char *classend (MatchState *ms, const char *p) {
|
||||
switch (*p++) {
|
||||
case L_ESC: {
|
||||
if (*p == '\0')
|
||||
luaL_error(ms->L, "malformed pattern (ends with " LUA_QL("%%") ")");
|
||||
return p+1;
|
||||
}
|
||||
case '[': {
|
||||
if (*p == '^') p++;
|
||||
do { /* look for a `]' */
|
||||
if (*p == '\0')
|
||||
luaL_error(ms->L, "malformed pattern (missing " LUA_QL("]") ")");
|
||||
if (*(p++) == L_ESC && *p != '\0')
|
||||
p++; /* skip escapes (e.g. `%]') */
|
||||
} while (*p != ']');
|
||||
return p+1;
|
||||
}
|
||||
default: {
|
||||
return p;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int match_class (int c, int cl) {
|
||||
int res;
|
||||
switch (tolower(cl)) {
|
||||
case 'a' : res = isalpha(c); break;
|
||||
case 'c' : res = iscntrl(c); break;
|
||||
case 'd' : res = isdigit(c); break;
|
||||
case 'l' : res = islower(c); break;
|
||||
case 'p' : res = ispunct(c); break;
|
||||
case 's' : res = isspace(c); break;
|
||||
case 'u' : res = isupper(c); break;
|
||||
case 'w' : res = isalnum(c); break;
|
||||
case 'x' : res = isxdigit(c); break;
|
||||
case 'z' : res = (c == 0); break;
|
||||
default: return (cl == c);
|
||||
}
|
||||
return (islower(cl) ? res : !res);
|
||||
}
|
||||
|
||||
|
||||
static int matchbracketclass (int c, const char *p, const char *ec) {
|
||||
int sig = 1;
|
||||
if (*(p+1) == '^') {
|
||||
sig = 0;
|
||||
p++; /* skip the `^' */
|
||||
}
|
||||
while (++p < ec) {
|
||||
if (*p == L_ESC) {
|
||||
p++;
|
||||
if (match_class(c, uchar(*p)))
|
||||
return sig;
|
||||
}
|
||||
else if ((*(p+1) == '-') && (p+2 < ec)) {
|
||||
p+=2;
|
||||
if (uchar(*(p-2)) <= c && c <= uchar(*p))
|
||||
return sig;
|
||||
}
|
||||
else if (uchar(*p) == c) return sig;
|
||||
}
|
||||
return !sig;
|
||||
}
|
||||
|
||||
|
||||
static int singlematch (int c, const char *p, const char *ep) {
|
||||
switch (*p) {
|
||||
case '.': return 1; /* matches any char */
|
||||
case L_ESC: return match_class(c, uchar(*(p+1)));
|
||||
case '[': return matchbracketclass(c, p, ep-1);
|
||||
default: return (uchar(*p) == c);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static const char *match (MatchState *ms, const char *s, const char *p);
|
||||
|
||||
|
||||
static const char *matchbalance (MatchState *ms, const char *s,
|
||||
const char *p) {
|
||||
if (*p == 0 || *(p+1) == 0)
|
||||
luaL_error(ms->L, "unbalanced pattern");
|
||||
if (*s != *p) return NULL;
|
||||
else {
|
||||
int b = *p;
|
||||
int e = *(p+1);
|
||||
int cont = 1;
|
||||
while (++s < ms->src_end) {
|
||||
if (*s == e) {
|
||||
if (--cont == 0) return s+1;
|
||||
}
|
||||
else if (*s == b) cont++;
|
||||
}
|
||||
}
|
||||
return NULL; /* string ends out of balance */
|
||||
}
|
||||
|
||||
|
||||
static const char *max_expand (MatchState *ms, const char *s,
|
||||
const char *p, const char *ep) {
|
||||
ptrdiff_t i = 0; /* counts maximum expand for item */
|
||||
while ((s+i)<ms->src_end && singlematch(uchar(*(s+i)), p, ep))
|
||||
i++;
|
||||
/* keeps trying to match with the maximum repetitions */
|
||||
while (i>=0) {
|
||||
const char *res = match(ms, (s+i), ep+1);
|
||||
if (res) return res;
|
||||
i--; /* else didn't match; reduce 1 repetition to try again */
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
static const char *min_expand (MatchState *ms, const char *s,
|
||||
const char *p, const char *ep) {
|
||||
for (;;) {
|
||||
const char *res = match(ms, s, ep+1);
|
||||
if (res != NULL)
|
||||
return res;
|
||||
else if (s<ms->src_end && singlematch(uchar(*s), p, ep))
|
||||
s++; /* try with one more repetition */
|
||||
else return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static const char *start_capture (MatchState *ms, const char *s,
|
||||
const char *p, int what) {
|
||||
const char *res;
|
||||
int level = ms->level;
|
||||
if (level >= LUA_MAXCAPTURES) luaL_error(ms->L, "too many captures");
|
||||
ms->capture[level].init = s;
|
||||
ms->capture[level].len = what;
|
||||
ms->level = level+1;
|
||||
if ((res=match(ms, s, p)) == NULL) /* match failed? */
|
||||
ms->level--; /* undo capture */
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
static const char *end_capture (MatchState *ms, const char *s,
|
||||
const char *p) {
|
||||
int l = capture_to_close(ms);
|
||||
const char *res;
|
||||
ms->capture[l].len = s - ms->capture[l].init; /* close capture */
|
||||
if ((res = match(ms, s, p)) == NULL) /* match failed? */
|
||||
ms->capture[l].len = CAP_UNFINISHED; /* undo capture */
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
static const char *match_capture (MatchState *ms, const char *s, int l) {
|
||||
size_t len;
|
||||
l = check_capture(ms, l);
|
||||
len = ms->capture[l].len;
|
||||
if ((size_t)(ms->src_end-s) >= len &&
|
||||
memcmp(ms->capture[l].init, s, len) == 0)
|
||||
return s+len;
|
||||
else return NULL;
|
||||
}
|
||||
|
||||
|
||||
static const char *match (MatchState *ms, const char *s, const char *p) {
|
||||
init: /* using goto's to optimize tail recursion */
|
||||
switch (*p) {
|
||||
case '(': { /* start capture */
|
||||
if (*(p+1) == ')') /* position capture? */
|
||||
return start_capture(ms, s, p+2, CAP_POSITION);
|
||||
else
|
||||
return start_capture(ms, s, p+1, CAP_UNFINISHED);
|
||||
}
|
||||
case ')': { /* end capture */
|
||||
return end_capture(ms, s, p+1);
|
||||
}
|
||||
case L_ESC: {
|
||||
switch (*(p+1)) {
|
||||
case 'b': { /* balanced string? */
|
||||
s = matchbalance(ms, s, p+2);
|
||||
if (s == NULL) return NULL;
|
||||
p+=4; goto init; /* else return match(ms, s, p+4); */
|
||||
}
|
||||
case 'f': { /* frontier? */
|
||||
const char *ep; char previous;
|
||||
p += 2;
|
||||
if (*p != '[')
|
||||
luaL_error(ms->L, "missing " LUA_QL("[") " after "
|
||||
LUA_QL("%%f") " in pattern");
|
||||
ep = classend(ms, p); /* points to what is next */
|
||||
previous = (s == ms->src_init) ? '\0' : *(s-1);
|
||||
if (matchbracketclass(uchar(previous), p, ep-1) ||
|
||||
!matchbracketclass(uchar(*s), p, ep-1)) return NULL;
|
||||
p=ep; goto init; /* else return match(ms, s, ep); */
|
||||
}
|
||||
default: {
|
||||
if (isdigit(uchar(*(p+1)))) { /* capture results (%0-%9)? */
|
||||
s = match_capture(ms, s, uchar(*(p+1)));
|
||||
if (s == NULL) return NULL;
|
||||
p+=2; goto init; /* else return match(ms, s, p+2) */
|
||||
}
|
||||
goto dflt; /* case default */
|
||||
}
|
||||
}
|
||||
}
|
||||
case '\0': { /* end of pattern */
|
||||
return s; /* match succeeded */
|
||||
}
|
||||
case '$': {
|
||||
if (*(p+1) == '\0') /* is the `$' the last char in pattern? */
|
||||
return (s == ms->src_end) ? s : NULL; /* check end of string */
|
||||
else goto dflt;
|
||||
}
|
||||
default: dflt: { /* it is a pattern item */
|
||||
const char *ep = classend(ms, p); /* points to what is next */
|
||||
int m = s<ms->src_end && singlematch(uchar(*s), p, ep);
|
||||
switch (*ep) {
|
||||
case '?': { /* optional */
|
||||
const char *res;
|
||||
if (m && ((res=match(ms, s+1, ep+1)) != NULL))
|
||||
return res;
|
||||
p=ep+1; goto init; /* else return match(ms, s, ep+1); */
|
||||
}
|
||||
case '*': { /* 0 or more repetitions */
|
||||
return max_expand(ms, s, p, ep);
|
||||
}
|
||||
case '+': { /* 1 or more repetitions */
|
||||
return (m ? max_expand(ms, s+1, p, ep) : NULL);
|
||||
}
|
||||
case '-': { /* 0 or more repetitions (minimum) */
|
||||
return min_expand(ms, s, p, ep);
|
||||
}
|
||||
default: {
|
||||
if (!m) return NULL;
|
||||
s++; p=ep; goto init; /* else return match(ms, s+1, ep); */
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
static const char *lmemfind (const char *s1, size_t l1,
|
||||
const char *s2, size_t l2) {
|
||||
if (l2 == 0) return s1; /* empty strings are everywhere */
|
||||
else if (l2 > l1) return NULL; /* avoids a negative `l1' */
|
||||
else {
|
||||
const char *init; /* to search for a `*s2' inside `s1' */
|
||||
l2--; /* 1st char will be checked by `memchr' */
|
||||
l1 = l1-l2; /* `s2' cannot be found after that */
|
||||
while (l1 > 0 && (init = (const char *)memchr(s1, *s2, l1)) != NULL) {
|
||||
init++; /* 1st char is already checked */
|
||||
if (memcmp(init, s2+1, l2) == 0)
|
||||
return init-1;
|
||||
else { /* correct `l1' and `s1' to try again */
|
||||
l1 -= init-s1;
|
||||
s1 = init;
|
||||
}
|
||||
}
|
||||
return NULL; /* not found */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void push_onecapture (MatchState *ms, int i, const char *s,
|
||||
const char *e) {
|
||||
if (i >= ms->level) {
|
||||
if (i == 0) /* ms->level == 0, too */
|
||||
lua_pushlstring(ms->L, s, e - s); /* add whole match */
|
||||
else
|
||||
luaL_error(ms->L, "invalid capture index");
|
||||
}
|
||||
else {
|
||||
ptrdiff_t l = ms->capture[i].len;
|
||||
if (l == CAP_UNFINISHED) luaL_error(ms->L, "unfinished capture");
|
||||
if (l == CAP_POSITION)
|
||||
lua_pushinteger(ms->L, ms->capture[i].init - ms->src_init + 1);
|
||||
else
|
||||
lua_pushlstring(ms->L, ms->capture[i].init, l);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int push_captures (MatchState *ms, const char *s, const char *e) {
|
||||
int i;
|
||||
int nlevels = (ms->level == 0 && s) ? 1 : ms->level;
|
||||
luaL_checkstack(ms->L, nlevels, "too many captures");
|
||||
for (i = 0; i < nlevels; i++)
|
||||
push_onecapture(ms, i, s, e);
|
||||
return nlevels; /* number of strings pushed */
|
||||
}
|
||||
|
||||
|
||||
static int str_find_aux (lua_State *L, int find) {
|
||||
size_t l1, l2;
|
||||
const char *s = luaL_checklstring(L, 1, &l1);
|
||||
const char *p = luaL_checklstring(L, 2, &l2);
|
||||
ptrdiff_t init = posrelat(luaL_optinteger(L, 3, 1), l1) - 1;
|
||||
if (init < 0) init = 0;
|
||||
else if ((size_t)(init) > l1) init = (ptrdiff_t)l1;
|
||||
if (find && (lua_toboolean(L, 4) || /* explicit request? */
|
||||
strpbrk(p, SPECIALS) == NULL)) { /* or no special characters? */
|
||||
/* do a plain search */
|
||||
const char *s2 = lmemfind(s+init, l1-init, p, l2);
|
||||
if (s2) {
|
||||
lua_pushinteger(L, s2-s+1);
|
||||
lua_pushinteger(L, s2-s+l2);
|
||||
return 2;
|
||||
}
|
||||
}
|
||||
else {
|
||||
MatchState ms;
|
||||
int anchor = (*p == '^') ? (p++, 1) : 0;
|
||||
const char *s1=s+init;
|
||||
ms.L = L;
|
||||
ms.src_init = s;
|
||||
ms.src_end = s+l1;
|
||||
do {
|
||||
const char *res;
|
||||
ms.level = 0;
|
||||
if ((res=match(&ms, s1, p)) != NULL) {
|
||||
if (find) {
|
||||
lua_pushinteger(L, s1-s+1); /* start */
|
||||
lua_pushinteger(L, res-s); /* end */
|
||||
return push_captures(&ms, NULL, 0) + 2;
|
||||
}
|
||||
else
|
||||
return push_captures(&ms, s1, res);
|
||||
}
|
||||
} while (s1++ < ms.src_end && !anchor);
|
||||
}
|
||||
lua_pushnil(L); /* not found */
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int str_find (lua_State *L) {
|
||||
return str_find_aux(L, 1);
|
||||
}
|
||||
|
||||
|
||||
static int str_match (lua_State *L) {
|
||||
return str_find_aux(L, 0);
|
||||
}
|
||||
|
||||
|
||||
static int gmatch_aux (lua_State *L) {
|
||||
MatchState ms;
|
||||
size_t ls;
|
||||
const char *s = lua_tolstring(L, lua_upvalueindex(1), &ls);
|
||||
const char *p = lua_tostring(L, lua_upvalueindex(2));
|
||||
const char *src;
|
||||
ms.L = L;
|
||||
ms.src_init = s;
|
||||
ms.src_end = s+ls;
|
||||
for (src = s + (size_t)lua_tointeger(L, lua_upvalueindex(3));
|
||||
src <= ms.src_end;
|
||||
src++) {
|
||||
const char *e;
|
||||
ms.level = 0;
|
||||
if ((e = match(&ms, src, p)) != NULL) {
|
||||
lua_Integer newstart = e-s;
|
||||
if (e == src) newstart++; /* empty match? go at least one position */
|
||||
lua_pushinteger(L, newstart);
|
||||
lua_replace(L, lua_upvalueindex(3));
|
||||
return push_captures(&ms, src, e);
|
||||
}
|
||||
}
|
||||
return 0; /* not found */
|
||||
}
|
||||
|
||||
|
||||
static int gmatch (lua_State *L) {
|
||||
luaL_checkstring(L, 1);
|
||||
luaL_checkstring(L, 2);
|
||||
lua_settop(L, 2);
|
||||
lua_pushinteger(L, 0);
|
||||
lua_pushcclosure(L, gmatch_aux, 3);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int gfind_nodef (lua_State *L) {
|
||||
return luaL_error(L, LUA_QL("string.gfind") " was renamed to "
|
||||
LUA_QL("string.gmatch"));
|
||||
}
|
||||
|
||||
|
||||
static void add_s (MatchState *ms, luaL_Buffer *b, const char *s,
|
||||
const char *e) {
|
||||
size_t l, i;
|
||||
const char *news = lua_tolstring(ms->L, 3, &l);
|
||||
for (i = 0; i < l; i++) {
|
||||
if (news[i] != L_ESC)
|
||||
luaL_addchar(b, news[i]);
|
||||
else {
|
||||
i++; /* skip ESC */
|
||||
if (!isdigit(uchar(news[i])))
|
||||
luaL_addchar(b, news[i]);
|
||||
else if (news[i] == '0')
|
||||
luaL_addlstring(b, s, e - s);
|
||||
else {
|
||||
push_onecapture(ms, news[i] - '1', s, e);
|
||||
luaL_addvalue(b); /* add capture to accumulated result */
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void add_value (MatchState *ms, luaL_Buffer *b, const char *s,
|
||||
const char *e) {
|
||||
lua_State *L = ms->L;
|
||||
switch (lua_type(L, 3)) {
|
||||
case LUA_TNUMBER:
|
||||
case LUA_TSTRING: {
|
||||
add_s(ms, b, s, e);
|
||||
return;
|
||||
}
|
||||
case LUA_TFUNCTION: {
|
||||
int n;
|
||||
lua_pushvalue(L, 3);
|
||||
n = push_captures(ms, s, e);
|
||||
lua_call(L, n, 1);
|
||||
break;
|
||||
}
|
||||
case LUA_TTABLE: {
|
||||
push_onecapture(ms, 0, s, e);
|
||||
lua_gettable(L, 3);
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (!lua_toboolean(L, -1)) { /* nil or false? */
|
||||
lua_pop(L, 1);
|
||||
lua_pushlstring(L, s, e - s); /* keep original text */
|
||||
}
|
||||
else if (!lua_isstring(L, -1))
|
||||
luaL_error(L, "invalid replacement value (a %s)", luaL_typename(L, -1));
|
||||
luaL_addvalue(b); /* add result to accumulator */
|
||||
}
|
||||
|
||||
|
||||
static int str_gsub (lua_State *L) {
|
||||
size_t srcl;
|
||||
const char *src = luaL_checklstring(L, 1, &srcl);
|
||||
const char *p = luaL_checkstring(L, 2);
|
||||
int tr = lua_type(L, 3);
|
||||
int max_s = luaL_optint(L, 4, srcl+1);
|
||||
int anchor = (*p == '^') ? (p++, 1) : 0;
|
||||
int n = 0;
|
||||
MatchState ms;
|
||||
luaL_Buffer b;
|
||||
luaL_argcheck(L, tr == LUA_TNUMBER || tr == LUA_TSTRING ||
|
||||
tr == LUA_TFUNCTION || tr == LUA_TTABLE, 3,
|
||||
"string/function/table expected");
|
||||
luaL_buffinit(L, &b);
|
||||
ms.L = L;
|
||||
ms.src_init = src;
|
||||
ms.src_end = src+srcl;
|
||||
while (n < max_s) {
|
||||
const char *e;
|
||||
ms.level = 0;
|
||||
e = match(&ms, src, p);
|
||||
if (e) {
|
||||
n++;
|
||||
add_value(&ms, &b, src, e);
|
||||
}
|
||||
if (e && e>src) /* non empty match? */
|
||||
src = e; /* skip it */
|
||||
else if (src < ms.src_end)
|
||||
luaL_addchar(&b, *src++);
|
||||
else break;
|
||||
if (anchor) break;
|
||||
}
|
||||
luaL_addlstring(&b, src, ms.src_end-src);
|
||||
luaL_pushresult(&b);
|
||||
lua_pushinteger(L, n); /* number of substitutions */
|
||||
return 2;
|
||||
}
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
/* maximum size of each formatted item (> len(format('%99.99f', -1e308))) */
|
||||
#define MAX_ITEM 512
|
||||
/* valid flags in a format specification */
|
||||
#define FLAGS "-+ #0"
|
||||
/*
|
||||
** maximum size of each format specification (such as '%-099.99d')
|
||||
** (+10 accounts for %99.99x plus margin of error)
|
||||
*/
|
||||
#define MAX_FORMAT (sizeof(FLAGS) + sizeof(LUA_INTFRMLEN) + 10)
|
||||
|
||||
|
||||
static void addquoted (lua_State *L, luaL_Buffer *b, int arg) {
|
||||
size_t l;
|
||||
const char *s = luaL_checklstring(L, arg, &l);
|
||||
luaL_addchar(b, '"');
|
||||
while (l--) {
|
||||
switch (*s) {
|
||||
case '"': case '\\': case '\n': {
|
||||
luaL_addchar(b, '\\');
|
||||
luaL_addchar(b, *s);
|
||||
break;
|
||||
}
|
||||
case '\r': {
|
||||
luaL_addlstring(b, "\\r", 2);
|
||||
break;
|
||||
}
|
||||
case '\0': {
|
||||
luaL_addlstring(b, "\\000", 4);
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
luaL_addchar(b, *s);
|
||||
break;
|
||||
}
|
||||
}
|
||||
s++;
|
||||
}
|
||||
luaL_addchar(b, '"');
|
||||
}
|
||||
|
||||
static const char *scanformat (lua_State *L, const char *strfrmt, char *form) {
|
||||
const char *p = strfrmt;
|
||||
while (*p != '\0' && strchr(FLAGS, *p) != NULL) p++; /* skip flags */
|
||||
if ((size_t)(p - strfrmt) >= sizeof(FLAGS))
|
||||
luaL_error(L, "invalid format (repeated flags)");
|
||||
if (isdigit(uchar(*p))) p++; /* skip width */
|
||||
if (isdigit(uchar(*p))) p++; /* (2 digits at most) */
|
||||
if (*p == '.') {
|
||||
p++;
|
||||
if (isdigit(uchar(*p))) p++; /* skip precision */
|
||||
if (isdigit(uchar(*p))) p++; /* (2 digits at most) */
|
||||
}
|
||||
if (isdigit(uchar(*p)))
|
||||
luaL_error(L, "invalid format (width or precision too long)");
|
||||
*(form++) = '%';
|
||||
strncpy(form, strfrmt, p - strfrmt + 1);
|
||||
form += p - strfrmt + 1;
|
||||
*form = '\0';
|
||||
return p;
|
||||
}
|
||||
|
||||
|
||||
static void addintlen (char *form) {
|
||||
size_t l = strlen(form);
|
||||
char spec = form[l - 1];
|
||||
strcpy(form + l - 1, LUA_INTFRMLEN);
|
||||
form[l + sizeof(LUA_INTFRMLEN) - 2] = spec;
|
||||
form[l + sizeof(LUA_INTFRMLEN) - 1] = '\0';
|
||||
}
|
||||
|
||||
|
||||
static int str_format (lua_State *L) {
|
||||
int top = lua_gettop(L);
|
||||
int arg = 1;
|
||||
size_t sfl;
|
||||
const char *strfrmt = luaL_checklstring(L, arg, &sfl);
|
||||
const char *strfrmt_end = strfrmt+sfl;
|
||||
luaL_Buffer b;
|
||||
luaL_buffinit(L, &b);
|
||||
while (strfrmt < strfrmt_end) {
|
||||
if (*strfrmt != L_ESC)
|
||||
luaL_addchar(&b, *strfrmt++);
|
||||
else if (*++strfrmt == L_ESC)
|
||||
luaL_addchar(&b, *strfrmt++); /* %% */
|
||||
else { /* format item */
|
||||
char form[MAX_FORMAT]; /* to store the format (`%...') */
|
||||
char buff[MAX_ITEM]; /* to store the formatted item */
|
||||
if (++arg > top)
|
||||
luaL_argerror(L, arg, "no value");
|
||||
strfrmt = scanformat(L, strfrmt, form);
|
||||
switch (*strfrmt++) {
|
||||
case 'c': {
|
||||
sprintf(buff, form, (int)luaL_checknumber(L, arg));
|
||||
break;
|
||||
}
|
||||
case 'd': case 'i': {
|
||||
addintlen(form);
|
||||
sprintf(buff, form, (LUA_INTFRM_T)luaL_checknumber(L, arg));
|
||||
break;
|
||||
}
|
||||
case 'o': case 'u': case 'x': case 'X': {
|
||||
addintlen(form);
|
||||
sprintf(buff, form, (unsigned LUA_INTFRM_T)luaL_checknumber(L, arg));
|
||||
break;
|
||||
}
|
||||
case 'e': case 'E': case 'f':
|
||||
case 'g': case 'G': {
|
||||
sprintf(buff, form, (double)luaL_checknumber(L, arg));
|
||||
break;
|
||||
}
|
||||
case 'q': {
|
||||
addquoted(L, &b, arg);
|
||||
continue; /* skip the 'addsize' at the end */
|
||||
}
|
||||
case 's': {
|
||||
size_t l;
|
||||
const char *s = luaL_checklstring(L, arg, &l);
|
||||
if (!strchr(form, '.') && l >= 100) {
|
||||
/* no precision and string is too long to be formatted;
|
||||
keep original string */
|
||||
lua_pushvalue(L, arg);
|
||||
luaL_addvalue(&b);
|
||||
continue; /* skip the `addsize' at the end */
|
||||
}
|
||||
else {
|
||||
sprintf(buff, form, s);
|
||||
break;
|
||||
}
|
||||
}
|
||||
default: { /* also treat cases `pnLlh' */
|
||||
return luaL_error(L, "invalid option " LUA_QL("%%%c") " to "
|
||||
LUA_QL("format"), *(strfrmt - 1));
|
||||
}
|
||||
}
|
||||
luaL_addlstring(&b, buff, strlen(buff));
|
||||
}
|
||||
}
|
||||
luaL_pushresult(&b);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static const luaL_Reg strlib[] = {
|
||||
{"byte", str_byte},
|
||||
{"char", str_char},
|
||||
{"dump", str_dump},
|
||||
{"find", str_find},
|
||||
{"format", str_format},
|
||||
{"gfind", gfind_nodef},
|
||||
{"gmatch", gmatch},
|
||||
{"gsub", str_gsub},
|
||||
{"len", str_len},
|
||||
{"lower", str_lower},
|
||||
{"match", str_match},
|
||||
{"rep", str_rep},
|
||||
{"reverse", str_reverse},
|
||||
{"sub", str_sub},
|
||||
{"upper", str_upper},
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
|
||||
static void createmetatable (lua_State *L) {
|
||||
lua_createtable(L, 0, 1); /* create metatable for strings */
|
||||
lua_pushliteral(L, ""); /* dummy string */
|
||||
lua_pushvalue(L, -2);
|
||||
lua_setmetatable(L, -2); /* set string metatable */
|
||||
lua_pop(L, 1); /* pop dummy string */
|
||||
lua_pushvalue(L, -2); /* string library... */
|
||||
lua_setfield(L, -2, "__index"); /* ...is the __index metamethod */
|
||||
lua_pop(L, 1); /* pop metatable */
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Open string library
|
||||
*/
|
||||
LUALIB_API int luaopen_string (lua_State *L) {
|
||||
luaL_register(L, LUA_STRLIBNAME, strlib);
|
||||
#if defined(LUA_COMPAT_GFIND)
|
||||
lua_getfield(L, -1, "gmatch");
|
||||
lua_setfield(L, -2, "gfind");
|
||||
#endif
|
||||
createmetatable(L);
|
||||
return 1;
|
||||
}
|
||||
|
588
src/lua/ltable.c
588
src/lua/ltable.c
|
@ -1,588 +0,0 @@
|
|||
/*
|
||||
** $Id: ltable.c,v 2.32.1.2 2007/12/28 15:32:23 roberto Exp $
|
||||
** Lua tables (hash)
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
/*
|
||||
** Implementation of tables (aka arrays, objects, or hash tables).
|
||||
** Tables keep its elements in two parts: an array part and a hash part.
|
||||
** Non-negative integer keys are all candidates to be kept in the array
|
||||
** part. The actual size of the array is the largest `n' such that at
|
||||
** least half the slots between 0 and n are in use.
|
||||
** Hash uses a mix of chained scatter table with Brent's variation.
|
||||
** A main invariant of these tables is that, if an element is not
|
||||
** in its main position (i.e. the `original' position that its hash gives
|
||||
** to it), then the colliding element is in its own main position.
|
||||
** Hence even when the load factor reaches 100%, performance remains good.
|
||||
*/
|
||||
|
||||
#include <math.h>
|
||||
#include <string.h>
|
||||
|
||||
#define ltable_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "ldebug.h"
|
||||
#include "ldo.h"
|
||||
#include "lgc.h"
|
||||
#include "lmem.h"
|
||||
#include "lobject.h"
|
||||
#include "lstate.h"
|
||||
#include "ltable.h"
|
||||
|
||||
|
||||
/*
|
||||
** max size of array part is 2^MAXBITS
|
||||
*/
|
||||
#if LUAI_BITSINT > 26
|
||||
#define MAXBITS 26
|
||||
#else
|
||||
#define MAXBITS (LUAI_BITSINT-2)
|
||||
#endif
|
||||
|
||||
#define MAXASIZE (1 << MAXBITS)
|
||||
|
||||
|
||||
#define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t))))
|
||||
|
||||
#define hashstr(t,str) hashpow2(t, (str)->tsv.hash)
|
||||
#define hashboolean(t,p) hashpow2(t, p)
|
||||
|
||||
|
||||
/*
|
||||
** for some types, it is better to avoid modulus by power of 2, as
|
||||
** they tend to have many 2 factors.
|
||||
*/
|
||||
#define hashmod(t,n) (gnode(t, ((n) % ((sizenode(t)-1)|1))))
|
||||
|
||||
|
||||
#define hashpointer(t,p) hashmod(t, IntPoint(p))
|
||||
|
||||
|
||||
/*
|
||||
** number of ints inside a lua_Number
|
||||
*/
|
||||
#define numints cast_int(sizeof(lua_Number)/sizeof(int))
|
||||
|
||||
|
||||
|
||||
#define dummynode (&dummynode_)
|
||||
|
||||
static const Node dummynode_ = {
|
||||
{{NULL}, LUA_TNIL}, /* value */
|
||||
{{{NULL}, LUA_TNIL, NULL}} /* key */
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
** hash for lua_Numbers
|
||||
*/
|
||||
static Node *hashnum (const Table *t, lua_Number n) {
|
||||
unsigned int a[numints];
|
||||
int i;
|
||||
if (luai_numeq(n, 0)) /* avoid problems with -0 */
|
||||
return gnode(t, 0);
|
||||
memcpy(a, &n, sizeof(a));
|
||||
for (i = 1; i < numints; i++) a[0] += a[i];
|
||||
return hashmod(t, a[0]);
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** returns the `main' position of an element in a table (that is, the index
|
||||
** of its hash value)
|
||||
*/
|
||||
static Node *mainposition (const Table *t, const TValue *key) {
|
||||
switch (ttype(key)) {
|
||||
case LUA_TNUMBER:
|
||||
return hashnum(t, nvalue(key));
|
||||
case LUA_TSTRING:
|
||||
return hashstr(t, rawtsvalue(key));
|
||||
case LUA_TBOOLEAN:
|
||||
return hashboolean(t, bvalue(key));
|
||||
case LUA_TLIGHTUSERDATA:
|
||||
return hashpointer(t, pvalue(key));
|
||||
default:
|
||||
return hashpointer(t, gcvalue(key));
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** returns the index for `key' if `key' is an appropriate key to live in
|
||||
** the array part of the table, -1 otherwise.
|
||||
*/
|
||||
static int arrayindex (const TValue *key) {
|
||||
if (ttisnumber(key)) {
|
||||
lua_Number n = nvalue(key);
|
||||
int k;
|
||||
lua_number2int(k, n);
|
||||
if (luai_numeq(cast_num(k), n))
|
||||
return k;
|
||||
}
|
||||
return -1; /* `key' did not match some condition */
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** returns the index of a `key' for table traversals. First goes all
|
||||
** elements in the array part, then elements in the hash part. The
|
||||
** beginning of a traversal is signalled by -1.
|
||||
*/
|
||||
static int findindex (lua_State *L, Table *t, StkId key) {
|
||||
int i;
|
||||
if (ttisnil(key)) return -1; /* first iteration */
|
||||
i = arrayindex(key);
|
||||
if (0 < i && i <= t->sizearray) /* is `key' inside array part? */
|
||||
return i-1; /* yes; that's the index (corrected to C) */
|
||||
else {
|
||||
Node *n = mainposition(t, key);
|
||||
do { /* check whether `key' is somewhere in the chain */
|
||||
/* key may be dead already, but it is ok to use it in `next' */
|
||||
if (luaO_rawequalObj(key2tval(n), key) ||
|
||||
(ttype(gkey(n)) == LUA_TDEADKEY && iscollectable(key) &&
|
||||
gcvalue(gkey(n)) == gcvalue(key))) {
|
||||
i = cast_int(n - gnode(t, 0)); /* key index in hash table */
|
||||
/* hash elements are numbered after array ones */
|
||||
return i + t->sizearray;
|
||||
}
|
||||
else n = gnext(n);
|
||||
} while (n);
|
||||
luaG_runerror(L, "invalid key to " LUA_QL("next")); /* key not found */
|
||||
return 0; /* to avoid warnings */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
int luaH_next (lua_State *L, Table *t, StkId key) {
|
||||
int i = findindex(L, t, key); /* find original element */
|
||||
for (i++; i < t->sizearray; i++) { /* try first array part */
|
||||
if (!ttisnil(&t->array[i])) { /* a non-nil value? */
|
||||
setnvalue(key, cast_num(i+1));
|
||||
setobj2s(L, key+1, &t->array[i]);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
for (i -= t->sizearray; i < sizenode(t); i++) { /* then hash part */
|
||||
if (!ttisnil(gval(gnode(t, i)))) { /* a non-nil value? */
|
||||
setobj2s(L, key, key2tval(gnode(t, i)));
|
||||
setobj2s(L, key+1, gval(gnode(t, i)));
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
return 0; /* no more elements */
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** {=============================================================
|
||||
** Rehash
|
||||
** ==============================================================
|
||||
*/
|
||||
|
||||
|
||||
static int computesizes (int nums[], int *narray) {
|
||||
int i;
|
||||
int twotoi; /* 2^i */
|
||||
int a = 0; /* number of elements smaller than 2^i */
|
||||
int na = 0; /* number of elements to go to array part */
|
||||
int n = 0; /* optimal size for array part */
|
||||
for (i = 0, twotoi = 1; twotoi/2 < *narray; i++, twotoi *= 2) {
|
||||
if (nums[i] > 0) {
|
||||
a += nums[i];
|
||||
if (a > twotoi/2) { /* more than half elements present? */
|
||||
n = twotoi; /* optimal size (till now) */
|
||||
na = a; /* all elements smaller than n will go to array part */
|
||||
}
|
||||
}
|
||||
if (a == *narray) break; /* all elements already counted */
|
||||
}
|
||||
*narray = n;
|
||||
lua_assert(*narray/2 <= na && na <= *narray);
|
||||
return na;
|
||||
}
|
||||
|
||||
|
||||
static int countint (const TValue *key, int *nums) {
|
||||
int k = arrayindex(key);
|
||||
if (0 < k && k <= MAXASIZE) { /* is `key' an appropriate array index? */
|
||||
nums[ceillog2(k)]++; /* count as such */
|
||||
return 1;
|
||||
}
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int numusearray (const Table *t, int *nums) {
|
||||
int lg;
|
||||
int ttlg; /* 2^lg */
|
||||
int ause = 0; /* summation of `nums' */
|
||||
int i = 1; /* count to traverse all array keys */
|
||||
for (lg=0, ttlg=1; lg<=MAXBITS; lg++, ttlg*=2) { /* for each slice */
|
||||
int lc = 0; /* counter */
|
||||
int lim = ttlg;
|
||||
if (lim > t->sizearray) {
|
||||
lim = t->sizearray; /* adjust upper limit */
|
||||
if (i > lim)
|
||||
break; /* no more elements to count */
|
||||
}
|
||||
/* count elements in range (2^(lg-1), 2^lg] */
|
||||
for (; i <= lim; i++) {
|
||||
if (!ttisnil(&t->array[i-1]))
|
||||
lc++;
|
||||
}
|
||||
nums[lg] += lc;
|
||||
ause += lc;
|
||||
}
|
||||
return ause;
|
||||
}
|
||||
|
||||
|
||||
static int numusehash (const Table *t, int *nums, int *pnasize) {
|
||||
int totaluse = 0; /* total number of elements */
|
||||
int ause = 0; /* summation of `nums' */
|
||||
int i = sizenode(t);
|
||||
while (i--) {
|
||||
Node *n = &t->node[i];
|
||||
if (!ttisnil(gval(n))) {
|
||||
ause += countint(key2tval(n), nums);
|
||||
totaluse++;
|
||||
}
|
||||
}
|
||||
*pnasize += ause;
|
||||
return totaluse;
|
||||
}
|
||||
|
||||
|
||||
static void setarrayvector (lua_State *L, Table *t, int size) {
|
||||
int i;
|
||||
luaM_reallocvector(L, t->array, t->sizearray, size, TValue);
|
||||
for (i=t->sizearray; i<size; i++)
|
||||
setnilvalue(&t->array[i]);
|
||||
t->sizearray = size;
|
||||
}
|
||||
|
||||
|
||||
static void setnodevector (lua_State *L, Table *t, int size) {
|
||||
int lsize;
|
||||
if (size == 0) { /* no elements to hash part? */
|
||||
t->node = cast(Node *, dummynode); /* use common `dummynode' */
|
||||
lsize = 0;
|
||||
}
|
||||
else {
|
||||
int i;
|
||||
lsize = ceillog2(size);
|
||||
if (lsize > MAXBITS)
|
||||
luaG_runerror(L, "table overflow");
|
||||
size = twoto(lsize);
|
||||
t->node = luaM_newvector(L, size, Node);
|
||||
for (i=0; i<size; i++) {
|
||||
Node *n = gnode(t, i);
|
||||
gnext(n) = NULL;
|
||||
setnilvalue(gkey(n));
|
||||
setnilvalue(gval(n));
|
||||
}
|
||||
}
|
||||
t->lsizenode = cast_byte(lsize);
|
||||
t->lastfree = gnode(t, size); /* all positions are free */
|
||||
}
|
||||
|
||||
|
||||
static void resize (lua_State *L, Table *t, int nasize, int nhsize) {
|
||||
int i;
|
||||
int oldasize = t->sizearray;
|
||||
int oldhsize = t->lsizenode;
|
||||
Node *nold = t->node; /* save old hash ... */
|
||||
if (nasize > oldasize) /* array part must grow? */
|
||||
setarrayvector(L, t, nasize);
|
||||
/* create new hash part with appropriate size */
|
||||
setnodevector(L, t, nhsize);
|
||||
if (nasize < oldasize) { /* array part must shrink? */
|
||||
t->sizearray = nasize;
|
||||
/* re-insert elements from vanishing slice */
|
||||
for (i=nasize; i<oldasize; i++) {
|
||||
if (!ttisnil(&t->array[i]))
|
||||
setobjt2t(L, luaH_setnum(L, t, i+1), &t->array[i]);
|
||||
}
|
||||
/* shrink array */
|
||||
luaM_reallocvector(L, t->array, oldasize, nasize, TValue);
|
||||
}
|
||||
/* re-insert elements from hash part */
|
||||
for (i = twoto(oldhsize) - 1; i >= 0; i--) {
|
||||
Node *old = nold+i;
|
||||
if (!ttisnil(gval(old)))
|
||||
setobjt2t(L, luaH_set(L, t, key2tval(old)), gval(old));
|
||||
}
|
||||
if (nold != dummynode)
|
||||
luaM_freearray(L, nold, twoto(oldhsize), Node); /* free old array */
|
||||
}
|
||||
|
||||
|
||||
void luaH_resizearray (lua_State *L, Table *t, int nasize) {
|
||||
int nsize = (t->node == dummynode) ? 0 : sizenode(t);
|
||||
resize(L, t, nasize, nsize);
|
||||
}
|
||||
|
||||
|
||||
static void rehash (lua_State *L, Table *t, const TValue *ek) {
|
||||
int nasize, na;
|
||||
int nums[MAXBITS+1]; /* nums[i] = number of keys between 2^(i-1) and 2^i */
|
||||
int i;
|
||||
int totaluse;
|
||||
for (i=0; i<=MAXBITS; i++) nums[i] = 0; /* reset counts */
|
||||
nasize = numusearray(t, nums); /* count keys in array part */
|
||||
totaluse = nasize; /* all those keys are integer keys */
|
||||
totaluse += numusehash(t, nums, &nasize); /* count keys in hash part */
|
||||
/* count extra key */
|
||||
nasize += countint(ek, nums);
|
||||
totaluse++;
|
||||
/* compute new size for array part */
|
||||
na = computesizes(nums, &nasize);
|
||||
/* resize the table to new computed sizes */
|
||||
resize(L, t, nasize, totaluse - na);
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** }=============================================================
|
||||
*/
|
||||
|
||||
|
||||
Table *luaH_new (lua_State *L, int narray, int nhash) {
|
||||
Table *t = luaM_new(L, Table);
|
||||
luaC_link(L, obj2gco(t), LUA_TTABLE);
|
||||
t->metatable = NULL;
|
||||
t->flags = cast_byte(~0);
|
||||
/* temporary values (kept only if some malloc fails) */
|
||||
t->array = NULL;
|
||||
t->sizearray = 0;
|
||||
t->lsizenode = 0;
|
||||
t->node = cast(Node *, dummynode);
|
||||
setarrayvector(L, t, narray);
|
||||
setnodevector(L, t, nhash);
|
||||
return t;
|
||||
}
|
||||
|
||||
|
||||
void luaH_free (lua_State *L, Table *t) {
|
||||
if (t->node != dummynode)
|
||||
luaM_freearray(L, t->node, sizenode(t), Node);
|
||||
luaM_freearray(L, t->array, t->sizearray, TValue);
|
||||
luaM_free(L, t);
|
||||
}
|
||||
|
||||
|
||||
static Node *getfreepos (Table *t) {
|
||||
while (t->lastfree-- > t->node) {
|
||||
if (ttisnil(gkey(t->lastfree)))
|
||||
return t->lastfree;
|
||||
}
|
||||
return NULL; /* could not find a free place */
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** inserts a new key into a hash table; first, check whether key's main
|
||||
** position is free. If not, check whether colliding node is in its main
|
||||
** position or not: if it is not, move colliding node to an empty place and
|
||||
** put new key in its main position; otherwise (colliding node is in its main
|
||||
** position), new key goes to an empty position.
|
||||
*/
|
||||
static TValue *newkey (lua_State *L, Table *t, const TValue *key) {
|
||||
Node *mp = mainposition(t, key);
|
||||
if (!ttisnil(gval(mp)) || mp == dummynode) {
|
||||
Node *othern;
|
||||
Node *n = getfreepos(t); /* get a free place */
|
||||
if (n == NULL) { /* cannot find a free place? */
|
||||
rehash(L, t, key); /* grow table */
|
||||
return luaH_set(L, t, key); /* re-insert key into grown table */
|
||||
}
|
||||
lua_assert(n != dummynode);
|
||||
othern = mainposition(t, key2tval(mp));
|
||||
if (othern != mp) { /* is colliding node out of its main position? */
|
||||
/* yes; move colliding node into free position */
|
||||
while (gnext(othern) != mp) othern = gnext(othern); /* find previous */
|
||||
gnext(othern) = n; /* redo the chain with `n' in place of `mp' */
|
||||
*n = *mp; /* copy colliding node into free pos. (mp->next also goes) */
|
||||
gnext(mp) = NULL; /* now `mp' is free */
|
||||
setnilvalue(gval(mp));
|
||||
}
|
||||
else { /* colliding node is in its own main position */
|
||||
/* new node will go into free position */
|
||||
gnext(n) = gnext(mp); /* chain new position */
|
||||
gnext(mp) = n;
|
||||
mp = n;
|
||||
}
|
||||
}
|
||||
gkey(mp)->value = key->value; gkey(mp)->tt = key->tt;
|
||||
luaC_barriert(L, t, key);
|
||||
lua_assert(ttisnil(gval(mp)));
|
||||
return gval(mp);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** search function for integers
|
||||
*/
|
||||
const TValue *luaH_getnum (Table *t, int key) {
|
||||
/* (1 <= key && key <= t->sizearray) */
|
||||
if (cast(unsigned int, key-1) < cast(unsigned int, t->sizearray))
|
||||
return &t->array[key-1];
|
||||
else {
|
||||
lua_Number nk = cast_num(key);
|
||||
Node *n = hashnum(t, nk);
|
||||
do { /* check whether `key' is somewhere in the chain */
|
||||
if (ttisnumber(gkey(n)) && luai_numeq(nvalue(gkey(n)), nk))
|
||||
return gval(n); /* that's it */
|
||||
else n = gnext(n);
|
||||
} while (n);
|
||||
return luaO_nilobject;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** search function for strings
|
||||
*/
|
||||
const TValue *luaH_getstr (Table *t, TString *key) {
|
||||
Node *n = hashstr(t, key);
|
||||
do { /* check whether `key' is somewhere in the chain */
|
||||
if (ttisstring(gkey(n)) && rawtsvalue(gkey(n)) == key)
|
||||
return gval(n); /* that's it */
|
||||
else n = gnext(n);
|
||||
} while (n);
|
||||
return luaO_nilobject;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** main search function
|
||||
*/
|
||||
const TValue *luaH_get (Table *t, const TValue *key) {
|
||||
switch (ttype(key)) {
|
||||
case LUA_TNIL: return luaO_nilobject;
|
||||
case LUA_TSTRING: return luaH_getstr(t, rawtsvalue(key));
|
||||
case LUA_TNUMBER: {
|
||||
int k;
|
||||
lua_Number n = nvalue(key);
|
||||
lua_number2int(k, n);
|
||||
if (luai_numeq(cast_num(k), nvalue(key))) /* index is int? */
|
||||
return luaH_getnum(t, k); /* use specialized version */
|
||||
/* else go through */
|
||||
}
|
||||
default: {
|
||||
Node *n = mainposition(t, key);
|
||||
do { /* check whether `key' is somewhere in the chain */
|
||||
if (luaO_rawequalObj(key2tval(n), key))
|
||||
return gval(n); /* that's it */
|
||||
else n = gnext(n);
|
||||
} while (n);
|
||||
return luaO_nilobject;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
TValue *luaH_set (lua_State *L, Table *t, const TValue *key) {
|
||||
const TValue *p = luaH_get(t, key);
|
||||
t->flags = 0;
|
||||
if (p != luaO_nilobject)
|
||||
return cast(TValue *, p);
|
||||
else {
|
||||
if (ttisnil(key)) luaG_runerror(L, "table index is nil");
|
||||
else if (ttisnumber(key) && luai_numisnan(nvalue(key)))
|
||||
luaG_runerror(L, "table index is NaN");
|
||||
return newkey(L, t, key);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
TValue *luaH_setnum (lua_State *L, Table *t, int key) {
|
||||
const TValue *p = luaH_getnum(t, key);
|
||||
if (p != luaO_nilobject)
|
||||
return cast(TValue *, p);
|
||||
else {
|
||||
TValue k;
|
||||
setnvalue(&k, cast_num(key));
|
||||
return newkey(L, t, &k);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
TValue *luaH_setstr (lua_State *L, Table *t, TString *key) {
|
||||
const TValue *p = luaH_getstr(t, key);
|
||||
if (p != luaO_nilobject)
|
||||
return cast(TValue *, p);
|
||||
else {
|
||||
TValue k;
|
||||
setsvalue(L, &k, key);
|
||||
return newkey(L, t, &k);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int unbound_search (Table *t, unsigned int j) {
|
||||
unsigned int i = j; /* i is zero or a present index */
|
||||
j++;
|
||||
/* find `i' and `j' such that i is present and j is not */
|
||||
while (!ttisnil(luaH_getnum(t, j))) {
|
||||
i = j;
|
||||
j *= 2;
|
||||
if (j > cast(unsigned int, MAX_INT)) { /* overflow? */
|
||||
/* table was built with bad purposes: resort to linear search */
|
||||
i = 1;
|
||||
while (!ttisnil(luaH_getnum(t, i))) i++;
|
||||
return i - 1;
|
||||
}
|
||||
}
|
||||
/* now do a binary search between them */
|
||||
while (j - i > 1) {
|
||||
unsigned int m = (i+j)/2;
|
||||
if (ttisnil(luaH_getnum(t, m))) j = m;
|
||||
else i = m;
|
||||
}
|
||||
return i;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Try to find a boundary in table `t'. A `boundary' is an integer index
|
||||
** such that t[i] is non-nil and t[i+1] is nil (and 0 if t[1] is nil).
|
||||
*/
|
||||
int luaH_getn (Table *t) {
|
||||
unsigned int j = t->sizearray;
|
||||
if (j > 0 && ttisnil(&t->array[j - 1])) {
|
||||
/* there is a boundary in the array part: (binary) search for it */
|
||||
unsigned int i = 0;
|
||||
while (j - i > 1) {
|
||||
unsigned int m = (i+j)/2;
|
||||
if (ttisnil(&t->array[m - 1])) j = m;
|
||||
else i = m;
|
||||
}
|
||||
return i;
|
||||
}
|
||||
/* else must find a boundary in hash part */
|
||||
else if (t->node == dummynode) /* hash part is empty? */
|
||||
return j; /* that is easy... */
|
||||
else return unbound_search(t, j);
|
||||
}
|
||||
|
||||
|
||||
|
||||
#if defined(LUA_DEBUG)
|
||||
|
||||
Node *luaH_mainposition (const Table *t, const TValue *key) {
|
||||
return mainposition(t, key);
|
||||
}
|
||||
|
||||
int luaH_isdummy (Node *n) { return n == dummynode; }
|
||||
|
||||
#endif
|
|
@ -1,40 +0,0 @@
|
|||
/*
|
||||
** $Id: ltable.h,v 2.10.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Lua tables (hash)
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef ltable_h
|
||||
#define ltable_h
|
||||
|
||||
#include "lobject.h"
|
||||
|
||||
|
||||
#define gnode(t,i) (&(t)->node[i])
|
||||
#define gkey(n) (&(n)->i_key.nk)
|
||||
#define gval(n) (&(n)->i_val)
|
||||
#define gnext(n) ((n)->i_key.nk.next)
|
||||
|
||||
#define key2tval(n) (&(n)->i_key.tvk)
|
||||
|
||||
|
||||
LUAI_FUNC const TValue *luaH_getnum (Table *t, int key);
|
||||
LUAI_FUNC TValue *luaH_setnum (lua_State *L, Table *t, int key);
|
||||
LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
|
||||
LUAI_FUNC TValue *luaH_setstr (lua_State *L, Table *t, TString *key);
|
||||
LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
|
||||
LUAI_FUNC TValue *luaH_set (lua_State *L, Table *t, const TValue *key);
|
||||
LUAI_FUNC Table *luaH_new (lua_State *L, int narray, int lnhash);
|
||||
LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, int nasize);
|
||||
LUAI_FUNC void luaH_free (lua_State *L, Table *t);
|
||||
LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key);
|
||||
LUAI_FUNC int luaH_getn (Table *t);
|
||||
|
||||
|
||||
#if defined(LUA_DEBUG)
|
||||
LUAI_FUNC Node *luaH_mainposition (const Table *t, const TValue *key);
|
||||
LUAI_FUNC int luaH_isdummy (Node *n);
|
||||
#endif
|
||||
|
||||
|
||||
#endif
|
|
@ -1,287 +0,0 @@
|
|||
/*
|
||||
** $Id: ltablib.c,v 1.38.1.3 2008/02/14 16:46:58 roberto Exp $
|
||||
** Library for Table Manipulation
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <stddef.h>
|
||||
|
||||
#define ltablib_c
|
||||
#define LUA_LIB
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lauxlib.h"
|
||||
#include "lualib.h"
|
||||
|
||||
|
||||
#define aux_getn(L,n) (luaL_checktype(L, n, LUA_TTABLE), luaL_getn(L, n))
|
||||
|
||||
|
||||
static int foreachi (lua_State *L) {
|
||||
int i;
|
||||
int n = aux_getn(L, 1);
|
||||
luaL_checktype(L, 2, LUA_TFUNCTION);
|
||||
for (i=1; i <= n; i++) {
|
||||
lua_pushvalue(L, 2); /* function */
|
||||
lua_pushinteger(L, i); /* 1st argument */
|
||||
lua_rawgeti(L, 1, i); /* 2nd argument */
|
||||
lua_call(L, 2, 1);
|
||||
if (!lua_isnil(L, -1))
|
||||
return 1;
|
||||
lua_pop(L, 1); /* remove nil result */
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int foreach (lua_State *L) {
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
luaL_checktype(L, 2, LUA_TFUNCTION);
|
||||
lua_pushnil(L); /* first key */
|
||||
while (lua_next(L, 1)) {
|
||||
lua_pushvalue(L, 2); /* function */
|
||||
lua_pushvalue(L, -3); /* key */
|
||||
lua_pushvalue(L, -3); /* value */
|
||||
lua_call(L, 2, 1);
|
||||
if (!lua_isnil(L, -1))
|
||||
return 1;
|
||||
lua_pop(L, 2); /* remove value and result */
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int maxn (lua_State *L) {
|
||||
lua_Number max = 0;
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
lua_pushnil(L); /* first key */
|
||||
while (lua_next(L, 1)) {
|
||||
lua_pop(L, 1); /* remove value */
|
||||
if (lua_type(L, -1) == LUA_TNUMBER) {
|
||||
lua_Number v = lua_tonumber(L, -1);
|
||||
if (v > max) max = v;
|
||||
}
|
||||
}
|
||||
lua_pushnumber(L, max);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int getn (lua_State *L) {
|
||||
lua_pushinteger(L, aux_getn(L, 1));
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int setn (lua_State *L) {
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
#ifndef luaL_setn
|
||||
luaL_setn(L, 1, luaL_checkint(L, 2));
|
||||
#else
|
||||
luaL_error(L, LUA_QL("setn") " is obsolete");
|
||||
#endif
|
||||
lua_pushvalue(L, 1);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int tinsert (lua_State *L) {
|
||||
int e = aux_getn(L, 1) + 1; /* first empty element */
|
||||
int pos; /* where to insert new element */
|
||||
switch (lua_gettop(L)) {
|
||||
case 2: { /* called with only 2 arguments */
|
||||
pos = e; /* insert new element at the end */
|
||||
break;
|
||||
}
|
||||
case 3: {
|
||||
int i;
|
||||
pos = luaL_checkint(L, 2); /* 2nd argument is the position */
|
||||
if (pos > e) e = pos; /* `grow' array if necessary */
|
||||
for (i = e; i > pos; i--) { /* move up elements */
|
||||
lua_rawgeti(L, 1, i-1);
|
||||
lua_rawseti(L, 1, i); /* t[i] = t[i-1] */
|
||||
}
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
return luaL_error(L, "wrong number of arguments to " LUA_QL("insert"));
|
||||
}
|
||||
}
|
||||
luaL_setn(L, 1, e); /* new size */
|
||||
lua_rawseti(L, 1, pos); /* t[pos] = v */
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int tremove (lua_State *L) {
|
||||
int e = aux_getn(L, 1);
|
||||
int pos = luaL_optint(L, 2, e);
|
||||
if (!(1 <= pos && pos <= e)) /* position is outside bounds? */
|
||||
return 0; /* nothing to remove */
|
||||
luaL_setn(L, 1, e - 1); /* t.n = n-1 */
|
||||
lua_rawgeti(L, 1, pos); /* result = t[pos] */
|
||||
for ( ;pos<e; pos++) {
|
||||
lua_rawgeti(L, 1, pos+1);
|
||||
lua_rawseti(L, 1, pos); /* t[pos] = t[pos+1] */
|
||||
}
|
||||
lua_pushnil(L);
|
||||
lua_rawseti(L, 1, e); /* t[e] = nil */
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static void addfield (lua_State *L, luaL_Buffer *b, int i) {
|
||||
lua_rawgeti(L, 1, i);
|
||||
if (!lua_isstring(L, -1))
|
||||
luaL_error(L, "invalid value (%s) at index %d in table for "
|
||||
LUA_QL("concat"), luaL_typename(L, -1), i);
|
||||
luaL_addvalue(b);
|
||||
}
|
||||
|
||||
|
||||
static int tconcat (lua_State *L) {
|
||||
luaL_Buffer b;
|
||||
size_t lsep;
|
||||
int i, last;
|
||||
const char *sep = luaL_optlstring(L, 2, "", &lsep);
|
||||
luaL_checktype(L, 1, LUA_TTABLE);
|
||||
i = luaL_optint(L, 3, 1);
|
||||
last = luaL_opt(L, luaL_checkint, 4, luaL_getn(L, 1));
|
||||
luaL_buffinit(L, &b);
|
||||
for (; i < last; i++) {
|
||||
addfield(L, &b, i);
|
||||
luaL_addlstring(&b, sep, lsep);
|
||||
}
|
||||
if (i == last) /* add last value (if interval was not empty) */
|
||||
addfield(L, &b, i);
|
||||
luaL_pushresult(&b);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================
|
||||
** Quicksort
|
||||
** (based on `Algorithms in MODULA-3', Robert Sedgewick;
|
||||
** Addison-Wesley, 1993.)
|
||||
*/
|
||||
|
||||
|
||||
static void set2 (lua_State *L, int i, int j) {
|
||||
lua_rawseti(L, 1, i);
|
||||
lua_rawseti(L, 1, j);
|
||||
}
|
||||
|
||||
static int sort_comp (lua_State *L, int a, int b) {
|
||||
if (!lua_isnil(L, 2)) { /* function? */
|
||||
int res;
|
||||
lua_pushvalue(L, 2);
|
||||
lua_pushvalue(L, a-1); /* -1 to compensate function */
|
||||
lua_pushvalue(L, b-2); /* -2 to compensate function and `a' */
|
||||
lua_call(L, 2, 1);
|
||||
res = lua_toboolean(L, -1);
|
||||
lua_pop(L, 1);
|
||||
return res;
|
||||
}
|
||||
else /* a < b? */
|
||||
return lua_lessthan(L, a, b);
|
||||
}
|
||||
|
||||
static void auxsort (lua_State *L, int l, int u) {
|
||||
while (l < u) { /* for tail recursion */
|
||||
int i, j;
|
||||
/* sort elements a[l], a[(l+u)/2] and a[u] */
|
||||
lua_rawgeti(L, 1, l);
|
||||
lua_rawgeti(L, 1, u);
|
||||
if (sort_comp(L, -1, -2)) /* a[u] < a[l]? */
|
||||
set2(L, l, u); /* swap a[l] - a[u] */
|
||||
else
|
||||
lua_pop(L, 2);
|
||||
if (u-l == 1) break; /* only 2 elements */
|
||||
i = (l+u)/2;
|
||||
lua_rawgeti(L, 1, i);
|
||||
lua_rawgeti(L, 1, l);
|
||||
if (sort_comp(L, -2, -1)) /* a[i]<a[l]? */
|
||||
set2(L, i, l);
|
||||
else {
|
||||
lua_pop(L, 1); /* remove a[l] */
|
||||
lua_rawgeti(L, 1, u);
|
||||
if (sort_comp(L, -1, -2)) /* a[u]<a[i]? */
|
||||
set2(L, i, u);
|
||||
else
|
||||
lua_pop(L, 2);
|
||||
}
|
||||
if (u-l == 2) break; /* only 3 elements */
|
||||
lua_rawgeti(L, 1, i); /* Pivot */
|
||||
lua_pushvalue(L, -1);
|
||||
lua_rawgeti(L, 1, u-1);
|
||||
set2(L, i, u-1);
|
||||
/* a[l] <= P == a[u-1] <= a[u], only need to sort from l+1 to u-2 */
|
||||
i = l; j = u-1;
|
||||
for (;;) { /* invariant: a[l..i] <= P <= a[j..u] */
|
||||
/* repeat ++i until a[i] >= P */
|
||||
while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) {
|
||||
if (i>u) luaL_error(L, "invalid order function for sorting");
|
||||
lua_pop(L, 1); /* remove a[i] */
|
||||
}
|
||||
/* repeat --j until a[j] <= P */
|
||||
while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) {
|
||||
if (j<l) luaL_error(L, "invalid order function for sorting");
|
||||
lua_pop(L, 1); /* remove a[j] */
|
||||
}
|
||||
if (j<i) {
|
||||
lua_pop(L, 3); /* pop pivot, a[i], a[j] */
|
||||
break;
|
||||
}
|
||||
set2(L, i, j);
|
||||
}
|
||||
lua_rawgeti(L, 1, u-1);
|
||||
lua_rawgeti(L, 1, i);
|
||||
set2(L, u-1, i); /* swap pivot (a[u-1]) with a[i] */
|
||||
/* a[l..i-1] <= a[i] == P <= a[i+1..u] */
|
||||
/* adjust so that smaller half is in [j..i] and larger one in [l..u] */
|
||||
if (i-l < u-i) {
|
||||
j=l; i=i-1; l=i+2;
|
||||
}
|
||||
else {
|
||||
j=i+1; i=u; u=j-2;
|
||||
}
|
||||
auxsort(L, j, i); /* call recursively the smaller one */
|
||||
} /* repeat the routine for the larger one */
|
||||
}
|
||||
|
||||
static int sort (lua_State *L) {
|
||||
int n = aux_getn(L, 1);
|
||||
luaL_checkstack(L, 40, ""); /* assume array is smaller than 2^40 */
|
||||
if (!lua_isnoneornil(L, 2)) /* is there a 2nd argument? */
|
||||
luaL_checktype(L, 2, LUA_TFUNCTION);
|
||||
lua_settop(L, 2); /* make sure there is two arguments */
|
||||
auxsort(L, 1, n);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* }====================================================== */
|
||||
|
||||
|
||||
static const luaL_Reg tab_funcs[] = {
|
||||
{"concat", tconcat},
|
||||
{"foreach", foreach},
|
||||
{"foreachi", foreachi},
|
||||
{"getn", getn},
|
||||
{"maxn", maxn},
|
||||
{"insert", tinsert},
|
||||
{"remove", tremove},
|
||||
{"setn", setn},
|
||||
{"sort", sort},
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
|
||||
LUALIB_API int luaopen_table (lua_State *L) {
|
||||
luaL_register(L, LUA_TABLIBNAME, tab_funcs);
|
||||
return 1;
|
||||
}
|
||||
|
|
@ -1,75 +0,0 @@
|
|||
/*
|
||||
** $Id: ltm.c,v 2.8.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Tag methods
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <string.h>
|
||||
|
||||
#define ltm_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lobject.h"
|
||||
#include "lstate.h"
|
||||
#include "lstring.h"
|
||||
#include "ltable.h"
|
||||
#include "ltm.h"
|
||||
|
||||
|
||||
|
||||
const char *const luaT_typenames[] = {
|
||||
"nil", "boolean", "userdata", "number",
|
||||
"string", "table", "function", "userdata", "thread",
|
||||
"proto", "upval"
|
||||
};
|
||||
|
||||
|
||||
void luaT_init (lua_State *L) {
|
||||
static const char *const luaT_eventname[] = { /* ORDER TM */
|
||||
"__index", "__newindex",
|
||||
"__gc", "__mode", "__eq",
|
||||
"__add", "__sub", "__mul", "__div", "__mod",
|
||||
"__pow", "__unm", "__len", "__lt", "__le",
|
||||
"__concat", "__call"
|
||||
};
|
||||
int i;
|
||||
for (i=0; i<TM_N; i++) {
|
||||
G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]);
|
||||
luaS_fix(G(L)->tmname[i]); /* never collect these names */
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** function to be used with macro "fasttm": optimized for absence of
|
||||
** tag methods
|
||||
*/
|
||||
const TValue *luaT_gettm (Table *events, TMS event, TString *ename) {
|
||||
const TValue *tm = luaH_getstr(events, ename);
|
||||
lua_assert(event <= TM_EQ);
|
||||
if (ttisnil(tm)) { /* no tag method? */
|
||||
events->flags |= cast_byte(1u<<event); /* cache this fact */
|
||||
return NULL;
|
||||
}
|
||||
else return tm;
|
||||
}
|
||||
|
||||
|
||||
const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
|
||||
Table *mt;
|
||||
switch (ttype(o)) {
|
||||
case LUA_TTABLE:
|
||||
mt = hvalue(o)->metatable;
|
||||
break;
|
||||
case LUA_TUSERDATA:
|
||||
mt = uvalue(o)->metatable;
|
||||
break;
|
||||
default:
|
||||
mt = G(L)->mt[ttype(o)];
|
||||
}
|
||||
return (mt ? luaH_getstr(mt, G(L)->tmname[event]) : luaO_nilobject);
|
||||
}
|
||||
|
|
@ -1,54 +0,0 @@
|
|||
/*
|
||||
** $Id: ltm.h,v 2.6.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Tag methods
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef ltm_h
|
||||
#define ltm_h
|
||||
|
||||
|
||||
#include "lobject.h"
|
||||
|
||||
|
||||
/*
|
||||
* WARNING: if you change the order of this enumeration,
|
||||
* grep "ORDER TM"
|
||||
*/
|
||||
typedef enum {
|
||||
TM_INDEX,
|
||||
TM_NEWINDEX,
|
||||
TM_GC,
|
||||
TM_MODE,
|
||||
TM_EQ, /* last tag method with `fast' access */
|
||||
TM_ADD,
|
||||
TM_SUB,
|
||||
TM_MUL,
|
||||
TM_DIV,
|
||||
TM_MOD,
|
||||
TM_POW,
|
||||
TM_UNM,
|
||||
TM_LEN,
|
||||
TM_LT,
|
||||
TM_LE,
|
||||
TM_CONCAT,
|
||||
TM_CALL,
|
||||
TM_N /* number of elements in the enum */
|
||||
} TMS;
|
||||
|
||||
|
||||
|
||||
#define gfasttm(g,et,e) ((et) == NULL ? NULL : \
|
||||
((et)->flags & (1u<<(e))) ? NULL : luaT_gettm(et, e, (g)->tmname[e]))
|
||||
|
||||
#define fasttm(l,et,e) gfasttm(G(l), et, e)
|
||||
|
||||
LUAI_DATA const char *const luaT_typenames[];
|
||||
|
||||
|
||||
LUAI_FUNC const TValue *luaT_gettm (Table *events, TMS event, TString *ename);
|
||||
LUAI_FUNC const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o,
|
||||
TMS event);
|
||||
LUAI_FUNC void luaT_init (lua_State *L);
|
||||
|
||||
#endif
|
388
src/lua/lua.h
388
src/lua/lua.h
|
@ -1,388 +0,0 @@
|
|||
/*
|
||||
** $Id: lua.h,v 1.218.1.7 2012/01/13 20:36:20 roberto Exp $
|
||||
** Lua - An Extensible Extension Language
|
||||
** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
|
||||
** See Copyright Notice at the end of this file
|
||||
*/
|
||||
|
||||
|
||||
#ifndef lua_h
|
||||
#define lua_h
|
||||
|
||||
#include <stdarg.h>
|
||||
#include <stddef.h>
|
||||
|
||||
|
||||
#include "luaconf.h"
|
||||
|
||||
|
||||
#define LUA_VERSION "Lua 5.1"
|
||||
#define LUA_RELEASE "Lua 5.1.5"
|
||||
#define LUA_VERSION_NUM 501
|
||||
#define LUA_COPYRIGHT "Copyright (C) 1994-2012 Lua.org, PUC-Rio"
|
||||
#define LUA_AUTHORS "R. Ierusalimschy, L. H. de Figueiredo & W. Celes"
|
||||
|
||||
|
||||
/* mark for precompiled code (`<esc>Lua') */
|
||||
#define LUA_SIGNATURE "\033Lua"
|
||||
|
||||
/* option for multiple returns in `lua_pcall' and `lua_call' */
|
||||
#define LUA_MULTRET (-1)
|
||||
|
||||
|
||||
/*
|
||||
** pseudo-indices
|
||||
*/
|
||||
#define LUA_REGISTRYINDEX (-10000)
|
||||
#define LUA_ENVIRONINDEX (-10001)
|
||||
#define LUA_GLOBALSINDEX (-10002)
|
||||
#define lua_upvalueindex(i) (LUA_GLOBALSINDEX-(i))
|
||||
|
||||
|
||||
/* thread status; 0 is OK */
|
||||
#define LUA_YIELD 1
|
||||
#define LUA_ERRRUN 2
|
||||
#define LUA_ERRSYNTAX 3
|
||||
#define LUA_ERRMEM 4
|
||||
#define LUA_ERRERR 5
|
||||
|
||||
|
||||
typedef struct lua_State lua_State;
|
||||
|
||||
typedef int (*lua_CFunction) (lua_State *L);
|
||||
|
||||
|
||||
/*
|
||||
** functions that read/write blocks when loading/dumping Lua chunks
|
||||
*/
|
||||
typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz);
|
||||
|
||||
typedef int (*lua_Writer) (lua_State *L, const void* p, size_t sz, void* ud);
|
||||
|
||||
|
||||
/*
|
||||
** prototype for memory-allocation functions
|
||||
*/
|
||||
typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
|
||||
|
||||
|
||||
/*
|
||||
** basic types
|
||||
*/
|
||||
#define LUA_TNONE (-1)
|
||||
|
||||
#define LUA_TNIL 0
|
||||
#define LUA_TBOOLEAN 1
|
||||
#define LUA_TLIGHTUSERDATA 2
|
||||
#define LUA_TNUMBER 3
|
||||
#define LUA_TSTRING 4
|
||||
#define LUA_TTABLE 5
|
||||
#define LUA_TFUNCTION 6
|
||||
#define LUA_TUSERDATA 7
|
||||
#define LUA_TTHREAD 8
|
||||
|
||||
|
||||
|
||||
/* minimum Lua stack available to a C function */
|
||||
#define LUA_MINSTACK 20
|
||||
|
||||
|
||||
/*
|
||||
** generic extra include file
|
||||
*/
|
||||
#if defined(LUA_USER_H)
|
||||
#include LUA_USER_H
|
||||
#endif
|
||||
|
||||
|
||||
/* type of numbers in Lua */
|
||||
typedef LUA_NUMBER lua_Number;
|
||||
|
||||
|
||||
/* type for integer functions */
|
||||
typedef LUA_INTEGER lua_Integer;
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** state manipulation
|
||||
*/
|
||||
LUA_API lua_State *(lua_newstate) (lua_Alloc f, void *ud);
|
||||
LUA_API void (lua_close) (lua_State *L);
|
||||
LUA_API lua_State *(lua_newthread) (lua_State *L);
|
||||
|
||||
LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf);
|
||||
|
||||
|
||||
/*
|
||||
** basic stack manipulation
|
||||
*/
|
||||
LUA_API int (lua_gettop) (lua_State *L);
|
||||
LUA_API void (lua_settop) (lua_State *L, int idx);
|
||||
LUA_API void (lua_pushvalue) (lua_State *L, int idx);
|
||||
LUA_API void (lua_remove) (lua_State *L, int idx);
|
||||
LUA_API void (lua_insert) (lua_State *L, int idx);
|
||||
LUA_API void (lua_replace) (lua_State *L, int idx);
|
||||
LUA_API int (lua_checkstack) (lua_State *L, int sz);
|
||||
|
||||
LUA_API void (lua_xmove) (lua_State *from, lua_State *to, int n);
|
||||
|
||||
|
||||
/*
|
||||
** access functions (stack -> C)
|
||||
*/
|
||||
|
||||
LUA_API int (lua_isnumber) (lua_State *L, int idx);
|
||||
LUA_API int (lua_isstring) (lua_State *L, int idx);
|
||||
LUA_API int (lua_iscfunction) (lua_State *L, int idx);
|
||||
LUA_API int (lua_isuserdata) (lua_State *L, int idx);
|
||||
LUA_API int (lua_type) (lua_State *L, int idx);
|
||||
LUA_API const char *(lua_typename) (lua_State *L, int tp);
|
||||
|
||||
LUA_API int (lua_equal) (lua_State *L, int idx1, int idx2);
|
||||
LUA_API int (lua_rawequal) (lua_State *L, int idx1, int idx2);
|
||||
LUA_API int (lua_lessthan) (lua_State *L, int idx1, int idx2);
|
||||
|
||||
LUA_API lua_Number (lua_tonumber) (lua_State *L, int idx);
|
||||
LUA_API lua_Integer (lua_tointeger) (lua_State *L, int idx);
|
||||
LUA_API int (lua_toboolean) (lua_State *L, int idx);
|
||||
LUA_API const char *(lua_tolstring) (lua_State *L, int idx, size_t *len);
|
||||
LUA_API size_t (lua_objlen) (lua_State *L, int idx);
|
||||
LUA_API lua_CFunction (lua_tocfunction) (lua_State *L, int idx);
|
||||
LUA_API void *(lua_touserdata) (lua_State *L, int idx);
|
||||
LUA_API lua_State *(lua_tothread) (lua_State *L, int idx);
|
||||
LUA_API const void *(lua_topointer) (lua_State *L, int idx);
|
||||
|
||||
|
||||
/*
|
||||
** push functions (C -> stack)
|
||||
*/
|
||||
LUA_API void (lua_pushnil) (lua_State *L);
|
||||
LUA_API void (lua_pushnumber) (lua_State *L, lua_Number n);
|
||||
LUA_API void (lua_pushinteger) (lua_State *L, lua_Integer n);
|
||||
LUA_API void (lua_pushlstring) (lua_State *L, const char *s, size_t l);
|
||||
LUA_API void (lua_pushstring) (lua_State *L, const char *s);
|
||||
LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt,
|
||||
va_list argp);
|
||||
LUA_API const char *(lua_pushfstring) (lua_State *L, const char *fmt, ...);
|
||||
LUA_API void (lua_pushcclosure) (lua_State *L, lua_CFunction fn, int n);
|
||||
LUA_API void (lua_pushboolean) (lua_State *L, int b);
|
||||
LUA_API void (lua_pushlightuserdata) (lua_State *L, void *p);
|
||||
LUA_API int (lua_pushthread) (lua_State *L);
|
||||
|
||||
|
||||
/*
|
||||
** get functions (Lua -> stack)
|
||||
*/
|
||||
LUA_API void (lua_gettable) (lua_State *L, int idx);
|
||||
LUA_API void (lua_getfield) (lua_State *L, int idx, const char *k);
|
||||
LUA_API void (lua_rawget) (lua_State *L, int idx);
|
||||
LUA_API void (lua_rawgeti) (lua_State *L, int idx, int n);
|
||||
LUA_API void (lua_createtable) (lua_State *L, int narr, int nrec);
|
||||
LUA_API void *(lua_newuserdata) (lua_State *L, size_t sz);
|
||||
LUA_API int (lua_getmetatable) (lua_State *L, int objindex);
|
||||
LUA_API void (lua_getfenv) (lua_State *L, int idx);
|
||||
|
||||
|
||||
/*
|
||||
** set functions (stack -> Lua)
|
||||
*/
|
||||
LUA_API void (lua_settable) (lua_State *L, int idx);
|
||||
LUA_API void (lua_setfield) (lua_State *L, int idx, const char *k);
|
||||
LUA_API void (lua_rawset) (lua_State *L, int idx);
|
||||
LUA_API void (lua_rawseti) (lua_State *L, int idx, int n);
|
||||
LUA_API int (lua_setmetatable) (lua_State *L, int objindex);
|
||||
LUA_API int (lua_setfenv) (lua_State *L, int idx);
|
||||
|
||||
|
||||
/*
|
||||
** `load' and `call' functions (load and run Lua code)
|
||||
*/
|
||||
LUA_API void (lua_call) (lua_State *L, int nargs, int nresults);
|
||||
LUA_API int (lua_pcall) (lua_State *L, int nargs, int nresults, int errfunc);
|
||||
LUA_API int (lua_cpcall) (lua_State *L, lua_CFunction func, void *ud);
|
||||
LUA_API int (lua_load) (lua_State *L, lua_Reader reader, void *dt,
|
||||
const char *chunkname);
|
||||
|
||||
LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data);
|
||||
|
||||
|
||||
/*
|
||||
** coroutine functions
|
||||
*/
|
||||
LUA_API int (lua_yield) (lua_State *L, int nresults);
|
||||
LUA_API int (lua_resume) (lua_State *L, int narg);
|
||||
LUA_API int (lua_status) (lua_State *L);
|
||||
|
||||
/*
|
||||
** garbage-collection function and options
|
||||
*/
|
||||
|
||||
#define LUA_GCSTOP 0
|
||||
#define LUA_GCRESTART 1
|
||||
#define LUA_GCCOLLECT 2
|
||||
#define LUA_GCCOUNT 3
|
||||
#define LUA_GCCOUNTB 4
|
||||
#define LUA_GCSTEP 5
|
||||
#define LUA_GCSETPAUSE 6
|
||||
#define LUA_GCSETSTEPMUL 7
|
||||
|
||||
LUA_API int (lua_gc) (lua_State *L, int what, int data);
|
||||
|
||||
|
||||
/*
|
||||
** miscellaneous functions
|
||||
*/
|
||||
|
||||
LUA_API int (lua_error) (lua_State *L);
|
||||
|
||||
LUA_API int (lua_next) (lua_State *L, int idx);
|
||||
|
||||
LUA_API void (lua_concat) (lua_State *L, int n);
|
||||
|
||||
LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud);
|
||||
LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud);
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** ===============================================================
|
||||
** some useful macros
|
||||
** ===============================================================
|
||||
*/
|
||||
|
||||
#define lua_pop(L,n) lua_settop(L, -(n)-1)
|
||||
|
||||
#define lua_newtable(L) lua_createtable(L, 0, 0)
|
||||
|
||||
#define lua_register(L,n,f) (lua_pushcfunction(L, (f)), lua_setglobal(L, (n)))
|
||||
|
||||
#define lua_pushcfunction(L,f) lua_pushcclosure(L, (f), 0)
|
||||
|
||||
#define lua_strlen(L,i) lua_objlen(L, (i))
|
||||
|
||||
#define lua_isfunction(L,n) (lua_type(L, (n)) == LUA_TFUNCTION)
|
||||
#define lua_istable(L,n) (lua_type(L, (n)) == LUA_TTABLE)
|
||||
#define lua_islightuserdata(L,n) (lua_type(L, (n)) == LUA_TLIGHTUSERDATA)
|
||||
#define lua_isnil(L,n) (lua_type(L, (n)) == LUA_TNIL)
|
||||
#define lua_isboolean(L,n) (lua_type(L, (n)) == LUA_TBOOLEAN)
|
||||
#define lua_isthread(L,n) (lua_type(L, (n)) == LUA_TTHREAD)
|
||||
#define lua_isnone(L,n) (lua_type(L, (n)) == LUA_TNONE)
|
||||
#define lua_isnoneornil(L, n) (lua_type(L, (n)) <= 0)
|
||||
|
||||
#define lua_pushliteral(L, s) \
|
||||
lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1)
|
||||
|
||||
#define lua_setglobal(L,s) lua_setfield(L, LUA_GLOBALSINDEX, (s))
|
||||
#define lua_getglobal(L,s) lua_getfield(L, LUA_GLOBALSINDEX, (s))
|
||||
|
||||
#define lua_tostring(L,i) lua_tolstring(L, (i), NULL)
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** compatibility macros and functions
|
||||
*/
|
||||
|
||||
#define lua_open() luaL_newstate()
|
||||
|
||||
#define lua_getregistry(L) lua_pushvalue(L, LUA_REGISTRYINDEX)
|
||||
|
||||
#define lua_getgccount(L) lua_gc(L, LUA_GCCOUNT, 0)
|
||||
|
||||
#define lua_Chunkreader lua_Reader
|
||||
#define lua_Chunkwriter lua_Writer
|
||||
|
||||
|
||||
/* hack */
|
||||
LUA_API void lua_setlevel (lua_State *from, lua_State *to);
|
||||
|
||||
|
||||
/*
|
||||
** {======================================================================
|
||||
** Debug API
|
||||
** =======================================================================
|
||||
*/
|
||||
|
||||
|
||||
/*
|
||||
** Event codes
|
||||
*/
|
||||
#define LUA_HOOKCALL 0
|
||||
#define LUA_HOOKRET 1
|
||||
#define LUA_HOOKLINE 2
|
||||
#define LUA_HOOKCOUNT 3
|
||||
#define LUA_HOOKTAILRET 4
|
||||
|
||||
|
||||
/*
|
||||
** Event masks
|
||||
*/
|
||||
#define LUA_MASKCALL (1 << LUA_HOOKCALL)
|
||||
#define LUA_MASKRET (1 << LUA_HOOKRET)
|
||||
#define LUA_MASKLINE (1 << LUA_HOOKLINE)
|
||||
#define LUA_MASKCOUNT (1 << LUA_HOOKCOUNT)
|
||||
|
||||
typedef struct lua_Debug lua_Debug; /* activation record */
|
||||
|
||||
|
||||
/* Functions to be called by the debuger in specific events */
|
||||
typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar);
|
||||
|
||||
|
||||
LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar);
|
||||
LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar);
|
||||
LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n);
|
||||
LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n);
|
||||
LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n);
|
||||
LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n);
|
||||
|
||||
LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count);
|
||||
LUA_API lua_Hook lua_gethook (lua_State *L);
|
||||
LUA_API int lua_gethookmask (lua_State *L);
|
||||
LUA_API int lua_gethookcount (lua_State *L);
|
||||
|
||||
|
||||
struct lua_Debug {
|
||||
int event;
|
||||
const char *name; /* (n) */
|
||||
const char *namewhat; /* (n) `global', `local', `field', `method' */
|
||||
const char *what; /* (S) `Lua', `C', `main', `tail' */
|
||||
const char *source; /* (S) */
|
||||
int currentline; /* (l) */
|
||||
int nups; /* (u) number of upvalues */
|
||||
int linedefined; /* (S) */
|
||||
int lastlinedefined; /* (S) */
|
||||
char short_src[LUA_IDSIZE]; /* (S) */
|
||||
/* private part */
|
||||
int i_ci; /* active function */
|
||||
};
|
||||
|
||||
/* }====================================================================== */
|
||||
|
||||
|
||||
/******************************************************************************
|
||||
* Copyright (C) 1994-2012 Lua.org, PUC-Rio. All rights reserved.
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining
|
||||
* a copy of this software and associated documentation files (the
|
||||
* "Software"), to deal in the Software without restriction, including
|
||||
* without limitation the rights to use, copy, modify, merge, publish,
|
||||
* distribute, sublicense, and/or sell copies of the Software, and to
|
||||
* permit persons to whom the Software is furnished to do so, subject to
|
||||
* the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be
|
||||
* included in all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||||
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
||||
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
||||
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
||||
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
||||
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||||
******************************************************************************/
|
||||
|
||||
|
||||
#endif
|
|
@ -1,763 +0,0 @@
|
|||
/*
|
||||
** $Id: luaconf.h,v 1.82.1.7 2008/02/11 16:25:08 roberto Exp $
|
||||
** Configuration file for Lua
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#ifndef lconfig_h
|
||||
#define lconfig_h
|
||||
|
||||
#include <limits.h>
|
||||
#include <stddef.h>
|
||||
|
||||
|
||||
/*
|
||||
** ==================================================================
|
||||
** Search for "@@" to find all configurable definitions.
|
||||
** ===================================================================
|
||||
*/
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_ANSI controls the use of non-ansi features.
|
||||
** CHANGE it (define it) if you want Lua to avoid the use of any
|
||||
** non-ansi feature or library.
|
||||
*/
|
||||
#if defined(__STRICT_ANSI__)
|
||||
#define LUA_ANSI
|
||||
#endif
|
||||
|
||||
|
||||
#if !defined(LUA_ANSI) && defined(_WIN32)
|
||||
#define LUA_WIN
|
||||
#endif
|
||||
|
||||
#if defined(LUA_USE_LINUX)
|
||||
#define LUA_USE_POSIX
|
||||
#define LUA_USE_DLOPEN /* needs an extra library: -ldl */
|
||||
#define LUA_USE_READLINE /* needs some extra libraries */
|
||||
#endif
|
||||
|
||||
#if defined(LUA_USE_MACOSX)
|
||||
#define LUA_USE_POSIX
|
||||
#define LUA_DL_DYLD /* does not need extra library */
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_USE_POSIX includes all functionallity listed as X/Open System
|
||||
@* Interfaces Extension (XSI).
|
||||
** CHANGE it (define it) if your system is XSI compatible.
|
||||
*/
|
||||
#if defined(LUA_USE_POSIX)
|
||||
#define LUA_USE_MKSTEMP
|
||||
#define LUA_USE_ISATTY
|
||||
#define LUA_USE_POPEN
|
||||
#define LUA_USE_ULONGJMP
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_PATH and LUA_CPATH are the names of the environment variables that
|
||||
@* Lua check to set its paths.
|
||||
@@ LUA_INIT is the name of the environment variable that Lua
|
||||
@* checks for initialization code.
|
||||
** CHANGE them if you want different names.
|
||||
*/
|
||||
#define LUA_PATH "LUA_PATH"
|
||||
#define LUA_CPATH "LUA_CPATH"
|
||||
#define LUA_INIT "LUA_INIT"
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
|
||||
@* Lua libraries.
|
||||
@@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
|
||||
@* C libraries.
|
||||
** CHANGE them if your machine has a non-conventional directory
|
||||
** hierarchy or if you want to install your libraries in
|
||||
** non-conventional directories.
|
||||
*/
|
||||
#if defined(_WIN32)
|
||||
/*
|
||||
** In Windows, any exclamation mark ('!') in the path is replaced by the
|
||||
** path of the directory of the executable file of the current process.
|
||||
*/
|
||||
#define LUA_LDIR "!\\lua\\"
|
||||
#define LUA_CDIR "!\\"
|
||||
#define LUA_PATH_DEFAULT \
|
||||
".\\?.lua;" LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \
|
||||
LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua"
|
||||
#define LUA_CPATH_DEFAULT \
|
||||
".\\?.dll;" LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll"
|
||||
|
||||
#else
|
||||
#define LUA_ROOT "/usr/local/"
|
||||
#define LUA_LDIR LUA_ROOT "share/lua/5.1/"
|
||||
#define LUA_CDIR LUA_ROOT "lib/lua/5.1/"
|
||||
#define LUA_PATH_DEFAULT \
|
||||
"./?.lua;" LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \
|
||||
LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua"
|
||||
#define LUA_CPATH_DEFAULT \
|
||||
"./?.so;" LUA_CDIR"?.so;" LUA_CDIR"loadall.so"
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_DIRSEP is the directory separator (for submodules).
|
||||
** CHANGE it if your machine does not use "/" as the directory separator
|
||||
** and is not Windows. (On Windows Lua automatically uses "\".)
|
||||
*/
|
||||
#if defined(_WIN32)
|
||||
#define LUA_DIRSEP "\\"
|
||||
#else
|
||||
#define LUA_DIRSEP "/"
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_PATHSEP is the character that separates templates in a path.
|
||||
@@ LUA_PATH_MARK is the string that marks the substitution points in a
|
||||
@* template.
|
||||
@@ LUA_EXECDIR in a Windows path is replaced by the executable's
|
||||
@* directory.
|
||||
@@ LUA_IGMARK is a mark to ignore all before it when bulding the
|
||||
@* luaopen_ function name.
|
||||
** CHANGE them if for some reason your system cannot use those
|
||||
** characters. (E.g., if one of those characters is a common character
|
||||
** in file/directory names.) Probably you do not need to change them.
|
||||
*/
|
||||
#define LUA_PATHSEP ";"
|
||||
#define LUA_PATH_MARK "?"
|
||||
#define LUA_EXECDIR "!"
|
||||
#define LUA_IGMARK "-"
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
|
||||
** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
|
||||
** machines, ptrdiff_t gives a good choice between int or long.)
|
||||
*/
|
||||
#define LUA_INTEGER ptrdiff_t
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_API is a mark for all core API functions.
|
||||
@@ LUALIB_API is a mark for all standard library functions.
|
||||
** CHANGE them if you need to define those functions in some special way.
|
||||
** For instance, if you want to create one Windows DLL with the core and
|
||||
** the libraries, you may want to use the following definition (define
|
||||
** LUA_BUILD_AS_DLL to get it).
|
||||
*/
|
||||
#if defined(LUA_BUILD_AS_DLL)
|
||||
|
||||
#if defined(LUA_CORE) || defined(LUA_LIB)
|
||||
#define LUA_API __declspec(dllexport)
|
||||
#else
|
||||
#define LUA_API __declspec(dllimport)
|
||||
#endif
|
||||
|
||||
#else
|
||||
|
||||
#define LUA_API extern
|
||||
|
||||
#endif
|
||||
|
||||
/* more often than not the libs go together with the core */
|
||||
#define LUALIB_API LUA_API
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_FUNC is a mark for all extern functions that are not to be
|
||||
@* exported to outside modules.
|
||||
@@ LUAI_DATA is a mark for all extern (const) variables that are not to
|
||||
@* be exported to outside modules.
|
||||
** CHANGE them if you need to mark them in some special way. Elf/gcc
|
||||
** (versions 3.2 and later) mark them as "hidden" to optimize access
|
||||
** when Lua is compiled as a shared library.
|
||||
*/
|
||||
#if defined(luaall_c)
|
||||
#define LUAI_FUNC static
|
||||
#define LUAI_DATA /* empty */
|
||||
|
||||
#elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
|
||||
defined(__ELF__)
|
||||
#define LUAI_FUNC __attribute__((visibility("hidden"))) extern
|
||||
#define LUAI_DATA LUAI_FUNC
|
||||
|
||||
#else
|
||||
#define LUAI_FUNC extern
|
||||
#define LUAI_DATA extern
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_QL describes how error messages quote program elements.
|
||||
** CHANGE it if you want a different appearance.
|
||||
*/
|
||||
#define LUA_QL(x) "'" x "'"
|
||||
#define LUA_QS LUA_QL("%s")
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_IDSIZE gives the maximum size for the description of the source
|
||||
@* of a function in debug information.
|
||||
** CHANGE it if you want a different size.
|
||||
*/
|
||||
#define LUA_IDSIZE 60
|
||||
|
||||
|
||||
/*
|
||||
** {==================================================================
|
||||
** Stand-alone configuration
|
||||
** ===================================================================
|
||||
*/
|
||||
|
||||
#if defined(lua_c) || defined(luaall_c)
|
||||
|
||||
/*
|
||||
@@ lua_stdin_is_tty detects whether the standard input is a 'tty' (that
|
||||
@* is, whether we're running lua interactively).
|
||||
** CHANGE it if you have a better definition for non-POSIX/non-Windows
|
||||
** systems.
|
||||
*/
|
||||
#if defined(LUA_USE_ISATTY)
|
||||
#include <unistd.h>
|
||||
#define lua_stdin_is_tty() isatty(0)
|
||||
#elif defined(LUA_WIN)
|
||||
#include <io.h>
|
||||
#include <stdio.h>
|
||||
#define lua_stdin_is_tty() _isatty(_fileno(stdin))
|
||||
#else
|
||||
#define lua_stdin_is_tty() 1 /* assume stdin is a tty */
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_PROMPT is the default prompt used by stand-alone Lua.
|
||||
@@ LUA_PROMPT2 is the default continuation prompt used by stand-alone Lua.
|
||||
** CHANGE them if you want different prompts. (You can also change the
|
||||
** prompts dynamically, assigning to globals _PROMPT/_PROMPT2.)
|
||||
*/
|
||||
#define LUA_PROMPT "> "
|
||||
#define LUA_PROMPT2 ">> "
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_PROGNAME is the default name for the stand-alone Lua program.
|
||||
** CHANGE it if your stand-alone interpreter has a different name and
|
||||
** your system is not able to detect that name automatically.
|
||||
*/
|
||||
#define LUA_PROGNAME "lua"
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_MAXINPUT is the maximum length for an input line in the
|
||||
@* stand-alone interpreter.
|
||||
** CHANGE it if you need longer lines.
|
||||
*/
|
||||
#define LUA_MAXINPUT 512
|
||||
|
||||
|
||||
/*
|
||||
@@ lua_readline defines how to show a prompt and then read a line from
|
||||
@* the standard input.
|
||||
@@ lua_saveline defines how to "save" a read line in a "history".
|
||||
@@ lua_freeline defines how to free a line read by lua_readline.
|
||||
** CHANGE them if you want to improve this functionality (e.g., by using
|
||||
** GNU readline and history facilities).
|
||||
*/
|
||||
#if defined(LUA_USE_READLINE)
|
||||
#include <stdio.h>
|
||||
#include <readline/readline.h>
|
||||
#include <readline/history.h>
|
||||
#define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL)
|
||||
#define lua_saveline(L,idx) \
|
||||
if (lua_strlen(L,idx) > 0) /* non-empty line? */ \
|
||||
add_history(lua_tostring(L, idx)); /* add it to history */
|
||||
#define lua_freeline(L,b) ((void)L, free(b))
|
||||
#else
|
||||
#define lua_readline(L,b,p) \
|
||||
((void)L, fputs(p, stdout), fflush(stdout), /* show prompt */ \
|
||||
fgets(b, LUA_MAXINPUT, stdin) != NULL) /* get line */
|
||||
#define lua_saveline(L,idx) { (void)L; (void)idx; }
|
||||
#define lua_freeline(L,b) { (void)L; (void)b; }
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
/* }================================================================== */
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_GCPAUSE defines the default pause between garbage-collector cycles
|
||||
@* as a percentage.
|
||||
** CHANGE it if you want the GC to run faster or slower (higher values
|
||||
** mean larger pauses which mean slower collection.) You can also change
|
||||
** this value dynamically.
|
||||
*/
|
||||
#define LUAI_GCPAUSE 200 /* 200% (wait memory to double before next GC) */
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_GCMUL defines the default speed of garbage collection relative to
|
||||
@* memory allocation as a percentage.
|
||||
** CHANGE it if you want to change the granularity of the garbage
|
||||
** collection. (Higher values mean coarser collections. 0 represents
|
||||
** infinity, where each step performs a full collection.) You can also
|
||||
** change this value dynamically.
|
||||
*/
|
||||
#define LUAI_GCMUL 200 /* GC runs 'twice the speed' of memory allocation */
|
||||
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_COMPAT_GETN controls compatibility with old getn behavior.
|
||||
** CHANGE it (define it) if you want exact compatibility with the
|
||||
** behavior of setn/getn in Lua 5.0.
|
||||
*/
|
||||
#undef LUA_COMPAT_GETN
|
||||
|
||||
/*
|
||||
@@ LUA_COMPAT_LOADLIB controls compatibility about global loadlib.
|
||||
** CHANGE it to undefined as soon as you do not need a global 'loadlib'
|
||||
** function (the function is still available as 'package.loadlib').
|
||||
*/
|
||||
#undef LUA_COMPAT_LOADLIB
|
||||
|
||||
/*
|
||||
@@ LUA_COMPAT_VARARG controls compatibility with old vararg feature.
|
||||
** CHANGE it to undefined as soon as your programs use only '...' to
|
||||
** access vararg parameters (instead of the old 'arg' table).
|
||||
*/
|
||||
#define LUA_COMPAT_VARARG
|
||||
|
||||
/*
|
||||
@@ LUA_COMPAT_MOD controls compatibility with old math.mod function.
|
||||
** CHANGE it to undefined as soon as your programs use 'math.fmod' or
|
||||
** the new '%' operator instead of 'math.mod'.
|
||||
*/
|
||||
#define LUA_COMPAT_MOD
|
||||
|
||||
/*
|
||||
@@ LUA_COMPAT_LSTR controls compatibility with old long string nesting
|
||||
@* facility.
|
||||
** CHANGE it to 2 if you want the old behaviour, or undefine it to turn
|
||||
** off the advisory error when nesting [[...]].
|
||||
*/
|
||||
#define LUA_COMPAT_LSTR 1
|
||||
|
||||
/*
|
||||
@@ LUA_COMPAT_GFIND controls compatibility with old 'string.gfind' name.
|
||||
** CHANGE it to undefined as soon as you rename 'string.gfind' to
|
||||
** 'string.gmatch'.
|
||||
*/
|
||||
#define LUA_COMPAT_GFIND
|
||||
|
||||
/*
|
||||
@@ LUA_COMPAT_OPENLIB controls compatibility with old 'luaL_openlib'
|
||||
@* behavior.
|
||||
** CHANGE it to undefined as soon as you replace to 'luaL_register'
|
||||
** your uses of 'luaL_openlib'
|
||||
*/
|
||||
#define LUA_COMPAT_OPENLIB
|
||||
|
||||
|
||||
|
||||
/*
|
||||
@@ luai_apicheck is the assert macro used by the Lua-C API.
|
||||
** CHANGE luai_apicheck if you want Lua to perform some checks in the
|
||||
** parameters it gets from API calls. This may slow down the interpreter
|
||||
** a bit, but may be quite useful when debugging C code that interfaces
|
||||
** with Lua. A useful redefinition is to use assert.h.
|
||||
*/
|
||||
#if defined(LUA_USE_APICHECK)
|
||||
#include <assert.h>
|
||||
#define luai_apicheck(L,o) { (void)L; assert(o); }
|
||||
#else
|
||||
#define luai_apicheck(L,o) { (void)L; }
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_BITSINT defines the number of bits in an int.
|
||||
** CHANGE here if Lua cannot automatically detect the number of bits of
|
||||
** your machine. Probably you do not need to change this.
|
||||
*/
|
||||
/* avoid overflows in comparison */
|
||||
#if INT_MAX-20 < 32760
|
||||
#define LUAI_BITSINT 16
|
||||
#elif INT_MAX > 2147483640L
|
||||
/* int has at least 32 bits */
|
||||
#define LUAI_BITSINT 32
|
||||
#else
|
||||
#error "you must define LUA_BITSINT with number of bits in an integer"
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_UINT32 is an unsigned integer with at least 32 bits.
|
||||
@@ LUAI_INT32 is an signed integer with at least 32 bits.
|
||||
@@ LUAI_UMEM is an unsigned integer big enough to count the total
|
||||
@* memory used by Lua.
|
||||
@@ LUAI_MEM is a signed integer big enough to count the total memory
|
||||
@* used by Lua.
|
||||
** CHANGE here if for some weird reason the default definitions are not
|
||||
** good enough for your machine. (The definitions in the 'else'
|
||||
** part always works, but may waste space on machines with 64-bit
|
||||
** longs.) Probably you do not need to change this.
|
||||
*/
|
||||
#if LUAI_BITSINT >= 32
|
||||
#define LUAI_UINT32 unsigned int
|
||||
#define LUAI_INT32 int
|
||||
#define LUAI_MAXINT32 INT_MAX
|
||||
#define LUAI_UMEM size_t
|
||||
#define LUAI_MEM ptrdiff_t
|
||||
#else
|
||||
/* 16-bit ints */
|
||||
#define LUAI_UINT32 unsigned long
|
||||
#define LUAI_INT32 long
|
||||
#define LUAI_MAXINT32 LONG_MAX
|
||||
#define LUAI_UMEM unsigned long
|
||||
#define LUAI_MEM long
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_MAXCALLS limits the number of nested calls.
|
||||
** CHANGE it if you need really deep recursive calls. This limit is
|
||||
** arbitrary; its only purpose is to stop infinite recursion before
|
||||
** exhausting memory.
|
||||
*/
|
||||
#define LUAI_MAXCALLS 20000
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_MAXCSTACK limits the number of Lua stack slots that a C function
|
||||
@* can use.
|
||||
** CHANGE it if you need lots of (Lua) stack space for your C
|
||||
** functions. This limit is arbitrary; its only purpose is to stop C
|
||||
** functions to consume unlimited stack space. (must be smaller than
|
||||
** -LUA_REGISTRYINDEX)
|
||||
*/
|
||||
#define LUAI_MAXCSTACK 8000
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** {==================================================================
|
||||
** CHANGE (to smaller values) the following definitions if your system
|
||||
** has a small C stack. (Or you may want to change them to larger
|
||||
** values if your system has a large C stack and these limits are
|
||||
** too rigid for you.) Some of these constants control the size of
|
||||
** stack-allocated arrays used by the compiler or the interpreter, while
|
||||
** others limit the maximum number of recursive calls that the compiler
|
||||
** or the interpreter can perform. Values too large may cause a C stack
|
||||
** overflow for some forms of deep constructs.
|
||||
** ===================================================================
|
||||
*/
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_MAXCCALLS is the maximum depth for nested C calls (short) and
|
||||
@* syntactical nested non-terminals in a program.
|
||||
*/
|
||||
#define LUAI_MAXCCALLS 200
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_MAXVARS is the maximum number of local variables per function
|
||||
@* (must be smaller than 250).
|
||||
*/
|
||||
#define LUAI_MAXVARS 200
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_MAXUPVALUES is the maximum number of upvalues per function
|
||||
@* (must be smaller than 250).
|
||||
*/
|
||||
#define LUAI_MAXUPVALUES 60
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
|
||||
*/
|
||||
#define LUAL_BUFFERSIZE BUFSIZ
|
||||
|
||||
/* }================================================================== */
|
||||
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** {==================================================================
|
||||
@@ LUA_NUMBER is the type of numbers in Lua.
|
||||
** CHANGE the following definitions only if you want to build Lua
|
||||
** with a number type different from double. You may also need to
|
||||
** change lua_number2int & lua_number2integer.
|
||||
** ===================================================================
|
||||
*/
|
||||
|
||||
#define LUA_NUMBER_DOUBLE
|
||||
#define LUA_NUMBER double
|
||||
|
||||
/*
|
||||
@@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
|
||||
@* over a number.
|
||||
*/
|
||||
#define LUAI_UACNUMBER double
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_NUMBER_SCAN is the format for reading numbers.
|
||||
@@ LUA_NUMBER_FMT is the format for writing numbers.
|
||||
@@ lua_number2str converts a number to a string.
|
||||
@@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
|
||||
@@ lua_str2number converts a string to a number.
|
||||
*/
|
||||
#define LUA_NUMBER_SCAN "%lf"
|
||||
#define LUA_NUMBER_FMT "%.14g"
|
||||
#define lua_number2str(s,n) sprintf((s), LUA_NUMBER_FMT, (n))
|
||||
#define LUAI_MAXNUMBER2STR 32 /* 16 digits, sign, point, and \0 */
|
||||
#define lua_str2number(s,p) strtod((s), (p))
|
||||
|
||||
|
||||
/*
|
||||
@@ The luai_num* macros define the primitive operations over numbers.
|
||||
*/
|
||||
#if defined(LUA_CORE)
|
||||
#include <math.h>
|
||||
#define luai_numadd(a,b) ((a)+(b))
|
||||
#define luai_numsub(a,b) ((a)-(b))
|
||||
#define luai_nummul(a,b) ((a)*(b))
|
||||
#define luai_numdiv(a,b) ((a)/(b))
|
||||
#define luai_nummod(a,b) ((a) - floor((a)/(b))*(b))
|
||||
#define luai_numpow(a,b) (pow(a,b))
|
||||
#define luai_numunm(a) (-(a))
|
||||
#define luai_numeq(a,b) ((a)==(b))
|
||||
#define luai_numlt(a,b) ((a)<(b))
|
||||
#define luai_numle(a,b) ((a)<=(b))
|
||||
#define luai_numisnan(a) (!luai_numeq((a), (a)))
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
@@ lua_number2int is a macro to convert lua_Number to int.
|
||||
@@ lua_number2integer is a macro to convert lua_Number to lua_Integer.
|
||||
** CHANGE them if you know a faster way to convert a lua_Number to
|
||||
** int (with any rounding method and without throwing errors) in your
|
||||
** system. In Pentium machines, a naive typecast from double to int
|
||||
** in C is extremely slow, so any alternative is worth trying.
|
||||
*/
|
||||
|
||||
/* On a Pentium, resort to a trick */
|
||||
#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \
|
||||
(defined(__i386) || defined (_M_IX86) || defined(__i386__))
|
||||
|
||||
/* On a Microsoft compiler, use assembler */
|
||||
#if defined(_MSC_VER)
|
||||
|
||||
#define lua_number2int(i,d) __asm fld d __asm fistp i
|
||||
#define lua_number2integer(i,n) lua_number2int(i, n)
|
||||
|
||||
/* the next trick should work on any Pentium, but sometimes clashes
|
||||
with a DirectX idiosyncrasy */
|
||||
#else
|
||||
|
||||
union luai_Cast { double l_d; long l_l; };
|
||||
#define lua_number2int(i,d) \
|
||||
{ volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }
|
||||
#define lua_number2integer(i,n) lua_number2int(i, n)
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
/* this option always works, but may be slow */
|
||||
#else
|
||||
#define lua_number2int(i,d) ((i)=(int)(d))
|
||||
#define lua_number2integer(i,d) ((i)=(lua_Integer)(d))
|
||||
|
||||
#endif
|
||||
|
||||
/* }================================================================== */
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment.
|
||||
** CHANGE it if your system requires alignments larger than double. (For
|
||||
** instance, if your system supports long doubles and they must be
|
||||
** aligned in 16-byte boundaries, then you should add long double in the
|
||||
** union.) Probably you do not need to change this.
|
||||
*/
|
||||
#define LUAI_USER_ALIGNMENT_T union { double u; void *s; long l; }
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_THROW/LUAI_TRY define how Lua does exception handling.
|
||||
** CHANGE them if you prefer to use longjmp/setjmp even with C++
|
||||
** or if want/don't to use _longjmp/_setjmp instead of regular
|
||||
** longjmp/setjmp. By default, Lua handles errors with exceptions when
|
||||
** compiling as C++ code, with _longjmp/_setjmp when asked to use them,
|
||||
** and with longjmp/setjmp otherwise.
|
||||
*/
|
||||
#if defined(__cplusplus)
|
||||
/* C++ exceptions */
|
||||
#define LUAI_THROW(L,c) throw(c)
|
||||
#define LUAI_TRY(L,c,a) try { a } catch(...) \
|
||||
{ if ((c)->status == 0) (c)->status = -1; }
|
||||
#define luai_jmpbuf int /* dummy variable */
|
||||
|
||||
#elif defined(LUA_USE_ULONGJMP)
|
||||
/* in Unix, try _longjmp/_setjmp (more efficient) */
|
||||
#define LUAI_THROW(L,c) _longjmp((c)->b, 1)
|
||||
#define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a }
|
||||
#define luai_jmpbuf jmp_buf
|
||||
|
||||
#else
|
||||
/* default handling with long jumps */
|
||||
#define LUAI_THROW(L,c) longjmp((c)->b, 1)
|
||||
#define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a }
|
||||
#define luai_jmpbuf jmp_buf
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_MAXCAPTURES is the maximum number of captures that a pattern
|
||||
@* can do during pattern-matching.
|
||||
** CHANGE it if you need more captures. This limit is arbitrary.
|
||||
*/
|
||||
#define LUA_MAXCAPTURES 32
|
||||
|
||||
|
||||
/*
|
||||
@@ lua_tmpnam is the function that the OS library uses to create a
|
||||
@* temporary name.
|
||||
@@ LUA_TMPNAMBUFSIZE is the maximum size of a name created by lua_tmpnam.
|
||||
** CHANGE them if you have an alternative to tmpnam (which is considered
|
||||
** insecure) or if you want the original tmpnam anyway. By default, Lua
|
||||
** uses tmpnam except when POSIX is available, where it uses mkstemp.
|
||||
*/
|
||||
#if defined(loslib_c) || defined(luaall_c)
|
||||
|
||||
#if defined(LUA_USE_MKSTEMP)
|
||||
#include <unistd.h>
|
||||
#define LUA_TMPNAMBUFSIZE 32
|
||||
#define lua_tmpnam(b,e) { \
|
||||
strcpy(b, "/tmp/lua_XXXXXX"); \
|
||||
e = mkstemp(b); \
|
||||
if (e != -1) close(e); \
|
||||
e = (e == -1); }
|
||||
|
||||
#else
|
||||
#define LUA_TMPNAMBUFSIZE L_tmpnam
|
||||
#define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); }
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
@@ lua_popen spawns a new process connected to the current one through
|
||||
@* the file streams.
|
||||
** CHANGE it if you have a way to implement it in your system.
|
||||
*/
|
||||
#if defined(LUA_USE_POPEN)
|
||||
|
||||
#define lua_popen(L,c,m) ((void)L, fflush(NULL), popen(c,m))
|
||||
#define lua_pclose(L,file) ((void)L, (pclose(file) != -1))
|
||||
|
||||
#elif defined(LUA_WIN)
|
||||
|
||||
#define lua_popen(L,c,m) ((void)L, _popen(c,m))
|
||||
#define lua_pclose(L,file) ((void)L, (_pclose(file) != -1))
|
||||
|
||||
#else
|
||||
|
||||
#define lua_popen(L,c,m) ((void)((void)c, m), \
|
||||
luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
|
||||
#define lua_pclose(L,file) ((void)((void)L, file), 0)
|
||||
|
||||
#endif
|
||||
|
||||
/*
|
||||
@@ LUA_DL_* define which dynamic-library system Lua should use.
|
||||
** CHANGE here if Lua has problems choosing the appropriate
|
||||
** dynamic-library system for your platform (either Windows' DLL, Mac's
|
||||
** dyld, or Unix's dlopen). If your system is some kind of Unix, there
|
||||
** is a good chance that it has dlopen, so LUA_DL_DLOPEN will work for
|
||||
** it. To use dlopen you also need to adapt the src/Makefile (probably
|
||||
** adding -ldl to the linker options), so Lua does not select it
|
||||
** automatically. (When you change the makefile to add -ldl, you must
|
||||
** also add -DLUA_USE_DLOPEN.)
|
||||
** If you do not want any kind of dynamic library, undefine all these
|
||||
** options.
|
||||
** By default, _WIN32 gets LUA_DL_DLL and MAC OS X gets LUA_DL_DYLD.
|
||||
*/
|
||||
#if defined(LUA_USE_DLOPEN)
|
||||
#define LUA_DL_DLOPEN
|
||||
#endif
|
||||
|
||||
#if defined(LUA_WIN)
|
||||
#define LUA_DL_DLL
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State
|
||||
@* (the data goes just *before* the lua_State pointer).
|
||||
** CHANGE (define) this if you really need that. This value must be
|
||||
** a multiple of the maximum alignment required for your machine.
|
||||
*/
|
||||
#define LUAI_EXTRASPACE 0
|
||||
|
||||
|
||||
/*
|
||||
@@ luai_userstate* allow user-specific actions on threads.
|
||||
** CHANGE them if you defined LUAI_EXTRASPACE and need to do something
|
||||
** extra when a thread is created/deleted/resumed/yielded.
|
||||
*/
|
||||
#define luai_userstateopen(L) ((void)L)
|
||||
#define luai_userstateclose(L) ((void)L)
|
||||
#define luai_userstatethread(L,L1) ((void)L)
|
||||
#define luai_userstatefree(L) ((void)L)
|
||||
#define luai_userstateresume(L,n) ((void)L)
|
||||
#define luai_userstateyield(L,n) ((void)L)
|
||||
|
||||
|
||||
/*
|
||||
@@ LUA_INTFRMLEN is the length modifier for integer conversions
|
||||
@* in 'string.format'.
|
||||
@@ LUA_INTFRM_T is the integer type correspoding to the previous length
|
||||
@* modifier.
|
||||
** CHANGE them if your system supports long long or does not support long.
|
||||
*/
|
||||
|
||||
#if defined(LUA_USELONGLONG)
|
||||
|
||||
#define LUA_INTFRMLEN "ll"
|
||||
#define LUA_INTFRM_T long long
|
||||
|
||||
#else
|
||||
|
||||
#define LUA_INTFRMLEN "l"
|
||||
#define LUA_INTFRM_T long
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
/* =================================================================== */
|
||||
|
||||
/*
|
||||
** Local configuration. You can use this space to add your redefinitions
|
||||
** without modifying the main part of the file.
|
||||
*/
|
||||
|
||||
|
||||
|
||||
#endif
|
||||
|
|
@ -1,55 +0,0 @@
|
|||
/*
|
||||
** $Id: lualib.h,v 1.36.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Lua standard libraries
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#ifndef lualib_h
|
||||
#define lualib_h
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
|
||||
/* Key to file-handle type */
|
||||
#define LUA_FILEHANDLE "FILE*"
|
||||
|
||||
|
||||
#define LUA_COLIBNAME "coroutine"
|
||||
LUALIB_API int (luaopen_base) (lua_State *L);
|
||||
|
||||
#define LUA_TABLIBNAME "table"
|
||||
LUALIB_API int (luaopen_table) (lua_State *L);
|
||||
|
||||
#define LUA_IOLIBNAME "io"
|
||||
LUALIB_API int (luaopen_io) (lua_State *L);
|
||||
|
||||
#define LUA_OSLIBNAME "os"
|
||||
LUALIB_API int (luaopen_os) (lua_State *L);
|
||||
|
||||
#define LUA_STRLIBNAME "string"
|
||||
LUALIB_API int (luaopen_string) (lua_State *L);
|
||||
|
||||
#define LUA_MATHLIBNAME "math"
|
||||
LUALIB_API int (luaopen_math) (lua_State *L);
|
||||
|
||||
#define LUA_DBLIBNAME "debug"
|
||||
LUALIB_API int (luaopen_debug) (lua_State *L);
|
||||
|
||||
#define LUA_LOADLIBNAME "package"
|
||||
LUALIB_API int (luaopen_package) (lua_State *L);
|
||||
|
||||
#define LUA_BITLIBNAME "bit"
|
||||
LUALIB_API int (luaopen_bit) (lua_State *L);
|
||||
|
||||
/* open all previous libraries */
|
||||
LUALIB_API void (luaL_openlibs) (lua_State *L);
|
||||
|
||||
|
||||
|
||||
#ifndef lua_assert
|
||||
#define lua_assert(x) ((void)0)
|
||||
#endif
|
||||
|
||||
|
||||
#endif
|
|
@ -1,227 +0,0 @@
|
|||
/*
|
||||
** $Id: lundump.c,v 2.7.1.4 2008/04/04 19:51:41 roberto Exp $
|
||||
** load precompiled Lua chunks
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#include <string.h>
|
||||
|
||||
#define lundump_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "ldebug.h"
|
||||
#include "ldo.h"
|
||||
#include "lfunc.h"
|
||||
#include "lmem.h"
|
||||
#include "lobject.h"
|
||||
#include "lstring.h"
|
||||
#include "lundump.h"
|
||||
#include "lzio.h"
|
||||
|
||||
typedef struct {
|
||||
lua_State* L;
|
||||
ZIO* Z;
|
||||
Mbuffer* b;
|
||||
const char* name;
|
||||
} LoadState;
|
||||
|
||||
#ifdef LUAC_TRUST_BINARIES
|
||||
#define IF(c,s)
|
||||
#define error(S,s)
|
||||
#else
|
||||
#define IF(c,s) if (c) error(S,s)
|
||||
|
||||
static void error(LoadState* S, const char* why)
|
||||
{
|
||||
luaO_pushfstring(S->L,"%s: %s in precompiled chunk",S->name,why);
|
||||
luaD_throw(S->L,LUA_ERRSYNTAX);
|
||||
}
|
||||
#endif
|
||||
|
||||
#define LoadMem(S,b,n,size) LoadBlock(S,b,(n)*(size))
|
||||
#define LoadByte(S) (lu_byte)LoadChar(S)
|
||||
#define LoadVar(S,x) LoadMem(S,&x,1,sizeof(x))
|
||||
#define LoadVector(S,b,n,size) LoadMem(S,b,n,size)
|
||||
|
||||
static void LoadBlock(LoadState* S, void* b, size_t size)
|
||||
{
|
||||
size_t r=luaZ_read(S->Z,b,size);
|
||||
IF (r!=0, "unexpected end");
|
||||
}
|
||||
|
||||
static int LoadChar(LoadState* S)
|
||||
{
|
||||
char x;
|
||||
LoadVar(S,x);
|
||||
return x;
|
||||
}
|
||||
|
||||
static int LoadInt(LoadState* S)
|
||||
{
|
||||
int x;
|
||||
LoadVar(S,x);
|
||||
IF (x<0, "bad integer");
|
||||
return x;
|
||||
}
|
||||
|
||||
static lua_Number LoadNumber(LoadState* S)
|
||||
{
|
||||
lua_Number x;
|
||||
LoadVar(S,x);
|
||||
return x;
|
||||
}
|
||||
|
||||
static TString* LoadString(LoadState* S)
|
||||
{
|
||||
size_t size;
|
||||
LoadVar(S,size);
|
||||
if (size==0)
|
||||
return NULL;
|
||||
else
|
||||
{
|
||||
char* s=luaZ_openspace(S->L,S->b,size);
|
||||
LoadBlock(S,s,size);
|
||||
return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */
|
||||
}
|
||||
}
|
||||
|
||||
static void LoadCode(LoadState* S, Proto* f)
|
||||
{
|
||||
int n=LoadInt(S);
|
||||
f->code=luaM_newvector(S->L,n,Instruction);
|
||||
f->sizecode=n;
|
||||
LoadVector(S,f->code,n,sizeof(Instruction));
|
||||
}
|
||||
|
||||
static Proto* LoadFunction(LoadState* S, TString* p);
|
||||
|
||||
static void LoadConstants(LoadState* S, Proto* f)
|
||||
{
|
||||
int i,n;
|
||||
n=LoadInt(S);
|
||||
f->k=luaM_newvector(S->L,n,TValue);
|
||||
f->sizek=n;
|
||||
for (i=0; i<n; i++) setnilvalue(&f->k[i]);
|
||||
for (i=0; i<n; i++)
|
||||
{
|
||||
TValue* o=&f->k[i];
|
||||
int t=LoadChar(S);
|
||||
switch (t)
|
||||
{
|
||||
case LUA_TNIL:
|
||||
setnilvalue(o);
|
||||
break;
|
||||
case LUA_TBOOLEAN:
|
||||
setbvalue(o,LoadChar(S)!=0);
|
||||
break;
|
||||
case LUA_TNUMBER:
|
||||
setnvalue(o,LoadNumber(S));
|
||||
break;
|
||||
case LUA_TSTRING:
|
||||
setsvalue2n(S->L,o,LoadString(S));
|
||||
break;
|
||||
default:
|
||||
error(S,"bad constant");
|
||||
break;
|
||||
}
|
||||
}
|
||||
n=LoadInt(S);
|
||||
f->p=luaM_newvector(S->L,n,Proto*);
|
||||
f->sizep=n;
|
||||
for (i=0; i<n; i++) f->p[i]=NULL;
|
||||
for (i=0; i<n; i++) f->p[i]=LoadFunction(S,f->source);
|
||||
}
|
||||
|
||||
static void LoadDebug(LoadState* S, Proto* f)
|
||||
{
|
||||
int i,n;
|
||||
n=LoadInt(S);
|
||||
f->lineinfo=luaM_newvector(S->L,n,int);
|
||||
f->sizelineinfo=n;
|
||||
LoadVector(S,f->lineinfo,n,sizeof(int));
|
||||
n=LoadInt(S);
|
||||
f->locvars=luaM_newvector(S->L,n,LocVar);
|
||||
f->sizelocvars=n;
|
||||
for (i=0; i<n; i++) f->locvars[i].varname=NULL;
|
||||
for (i=0; i<n; i++)
|
||||
{
|
||||
f->locvars[i].varname=LoadString(S);
|
||||
f->locvars[i].startpc=LoadInt(S);
|
||||
f->locvars[i].endpc=LoadInt(S);
|
||||
}
|
||||
n=LoadInt(S);
|
||||
f->upvalues=luaM_newvector(S->L,n,TString*);
|
||||
f->sizeupvalues=n;
|
||||
for (i=0; i<n; i++) f->upvalues[i]=NULL;
|
||||
for (i=0; i<n; i++) f->upvalues[i]=LoadString(S);
|
||||
}
|
||||
|
||||
static Proto* LoadFunction(LoadState* S, TString* p)
|
||||
{
|
||||
Proto* f;
|
||||
if (++S->L->nCcalls > LUAI_MAXCCALLS) error(S,"code too deep");
|
||||
f=luaF_newproto(S->L);
|
||||
setptvalue2s(S->L,S->L->top,f); incr_top(S->L);
|
||||
f->source=LoadString(S); if (f->source==NULL) f->source=p;
|
||||
f->linedefined=LoadInt(S);
|
||||
f->lastlinedefined=LoadInt(S);
|
||||
f->nups=LoadByte(S);
|
||||
f->numparams=LoadByte(S);
|
||||
f->is_vararg=LoadByte(S);
|
||||
f->maxstacksize=LoadByte(S);
|
||||
LoadCode(S,f);
|
||||
LoadConstants(S,f);
|
||||
LoadDebug(S,f);
|
||||
IF (!luaG_checkcode(f), "bad code");
|
||||
S->L->top--;
|
||||
S->L->nCcalls--;
|
||||
return f;
|
||||
}
|
||||
|
||||
static void LoadHeader(LoadState* S)
|
||||
{
|
||||
char h[LUAC_HEADERSIZE];
|
||||
char s[LUAC_HEADERSIZE];
|
||||
luaU_header(h);
|
||||
LoadBlock(S,s,LUAC_HEADERSIZE);
|
||||
IF (memcmp(h,s,LUAC_HEADERSIZE)!=0, "bad header");
|
||||
}
|
||||
|
||||
/*
|
||||
** load precompiled chunk
|
||||
*/
|
||||
Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name)
|
||||
{
|
||||
LoadState S;
|
||||
if (*name=='@' || *name=='=')
|
||||
S.name=name+1;
|
||||
else if (*name==LUA_SIGNATURE[0])
|
||||
S.name="binary string";
|
||||
else
|
||||
S.name=name;
|
||||
S.L=L;
|
||||
S.Z=Z;
|
||||
S.b=buff;
|
||||
LoadHeader(&S);
|
||||
return LoadFunction(&S,luaS_newliteral(L,"=?"));
|
||||
}
|
||||
|
||||
/*
|
||||
* make header
|
||||
*/
|
||||
void luaU_header (char* h)
|
||||
{
|
||||
int x=1;
|
||||
memcpy(h,LUA_SIGNATURE,sizeof(LUA_SIGNATURE)-1);
|
||||
h+=sizeof(LUA_SIGNATURE)-1;
|
||||
*h++=(char)LUAC_VERSION;
|
||||
*h++=(char)LUAC_FORMAT;
|
||||
*h++=(char)*(char*)&x; /* endianness */
|
||||
*h++=(char)sizeof(int);
|
||||
*h++=(char)sizeof(size_t);
|
||||
*h++=(char)sizeof(Instruction);
|
||||
*h++=(char)sizeof(lua_Number);
|
||||
*h++=(char)(((lua_Number)0.5)==0); /* is lua_Number integral? */
|
||||
}
|
|
@ -1,36 +0,0 @@
|
|||
/*
|
||||
** $Id: lundump.h,v 1.37.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** load precompiled Lua chunks
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef lundump_h
|
||||
#define lundump_h
|
||||
|
||||
#include "lobject.h"
|
||||
#include "lzio.h"
|
||||
|
||||
/* load one chunk; from lundump.c */
|
||||
LUAI_FUNC Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name);
|
||||
|
||||
/* make header; from lundump.c */
|
||||
LUAI_FUNC void luaU_header (char* h);
|
||||
|
||||
/* dump one chunk; from ldump.c */
|
||||
LUAI_FUNC int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip);
|
||||
|
||||
#ifdef luac_c
|
||||
/* print one chunk; from print.c */
|
||||
LUAI_FUNC void luaU_print (const Proto* f, int full);
|
||||
#endif
|
||||
|
||||
/* for header of binary files -- this is Lua 5.1 */
|
||||
#define LUAC_VERSION 0x51
|
||||
|
||||
/* for header of binary files -- this is the official format */
|
||||
#define LUAC_FORMAT 0
|
||||
|
||||
/* size of header of binary files */
|
||||
#define LUAC_HEADERSIZE 12
|
||||
|
||||
#endif
|
767
src/lua/lvm.c
767
src/lua/lvm.c
|
@ -1,767 +0,0 @@
|
|||
/*
|
||||
** $Id: lvm.c,v 2.63.1.5 2011/08/17 20:43:11 roberto Exp $
|
||||
** Lua virtual machine
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#define lvm_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "ldebug.h"
|
||||
#include "ldo.h"
|
||||
#include "lfunc.h"
|
||||
#include "lgc.h"
|
||||
#include "lobject.h"
|
||||
#include "lopcodes.h"
|
||||
#include "lstate.h"
|
||||
#include "lstring.h"
|
||||
#include "ltable.h"
|
||||
#include "ltm.h"
|
||||
#include "lvm.h"
|
||||
|
||||
|
||||
|
||||
/* limit for table tag-method chains (to avoid loops) */
|
||||
#define MAXTAGLOOP 100
|
||||
|
||||
|
||||
const TValue *luaV_tonumber (const TValue *obj, TValue *n) {
|
||||
lua_Number num;
|
||||
if (ttisnumber(obj)) return obj;
|
||||
if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) {
|
||||
setnvalue(n, num);
|
||||
return n;
|
||||
}
|
||||
else
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
int luaV_tostring (lua_State *L, StkId obj) {
|
||||
if (!ttisnumber(obj))
|
||||
return 0;
|
||||
else {
|
||||
char s[LUAI_MAXNUMBER2STR];
|
||||
lua_Number n = nvalue(obj);
|
||||
lua_number2str(s, n);
|
||||
setsvalue2s(L, obj, luaS_new(L, s));
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void traceexec (lua_State *L, const Instruction *pc) {
|
||||
lu_byte mask = L->hookmask;
|
||||
const Instruction *oldpc = L->savedpc;
|
||||
L->savedpc = pc;
|
||||
if ((mask & LUA_MASKCOUNT) && L->hookcount == 0) {
|
||||
resethookcount(L);
|
||||
luaD_callhook(L, LUA_HOOKCOUNT, -1);
|
||||
}
|
||||
if (mask & LUA_MASKLINE) {
|
||||
Proto *p = ci_func(L->ci)->l.p;
|
||||
int npc = pcRel(pc, p);
|
||||
int newline = getline(p, npc);
|
||||
/* call linehook when enter a new function, when jump back (loop),
|
||||
or when enter a new line */
|
||||
if (npc == 0 || pc <= oldpc || newline != getline(p, pcRel(oldpc, p)))
|
||||
luaD_callhook(L, LUA_HOOKLINE, newline);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void callTMres (lua_State *L, StkId res, const TValue *f,
|
||||
const TValue *p1, const TValue *p2) {
|
||||
ptrdiff_t result = savestack(L, res);
|
||||
setobj2s(L, L->top, f); /* push function */
|
||||
setobj2s(L, L->top+1, p1); /* 1st argument */
|
||||
setobj2s(L, L->top+2, p2); /* 2nd argument */
|
||||
luaD_checkstack(L, 3);
|
||||
L->top += 3;
|
||||
luaD_call(L, L->top - 3, 1);
|
||||
res = restorestack(L, result);
|
||||
L->top--;
|
||||
setobjs2s(L, res, L->top);
|
||||
}
|
||||
|
||||
|
||||
|
||||
static void callTM (lua_State *L, const TValue *f, const TValue *p1,
|
||||
const TValue *p2, const TValue *p3) {
|
||||
setobj2s(L, L->top, f); /* push function */
|
||||
setobj2s(L, L->top+1, p1); /* 1st argument */
|
||||
setobj2s(L, L->top+2, p2); /* 2nd argument */
|
||||
setobj2s(L, L->top+3, p3); /* 3th argument */
|
||||
luaD_checkstack(L, 4);
|
||||
L->top += 4;
|
||||
luaD_call(L, L->top - 4, 0);
|
||||
}
|
||||
|
||||
|
||||
void luaV_gettable (lua_State *L, const TValue *t, TValue *key, StkId val) {
|
||||
int loop;
|
||||
for (loop = 0; loop < MAXTAGLOOP; loop++) {
|
||||
const TValue *tm;
|
||||
if (ttistable(t)) { /* `t' is a table? */
|
||||
Table *h = hvalue(t);
|
||||
const TValue *res = luaH_get(h, key); /* do a primitive get */
|
||||
if (!ttisnil(res) || /* result is no nil? */
|
||||
(tm = fasttm(L, h->metatable, TM_INDEX)) == NULL) { /* or no TM? */
|
||||
setobj2s(L, val, res);
|
||||
return;
|
||||
}
|
||||
/* else will try the tag method */
|
||||
}
|
||||
else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_INDEX)))
|
||||
luaG_typeerror(L, t, "index");
|
||||
if (ttisfunction(tm)) {
|
||||
callTMres(L, val, tm, t, key);
|
||||
return;
|
||||
}
|
||||
t = tm; /* else repeat with `tm' */
|
||||
}
|
||||
luaG_runerror(L, "loop in gettable");
|
||||
}
|
||||
|
||||
|
||||
void luaV_settable (lua_State *L, const TValue *t, TValue *key, StkId val) {
|
||||
int loop;
|
||||
TValue temp;
|
||||
for (loop = 0; loop < MAXTAGLOOP; loop++) {
|
||||
const TValue *tm;
|
||||
if (ttistable(t)) { /* `t' is a table? */
|
||||
Table *h = hvalue(t);
|
||||
TValue *oldval = luaH_set(L, h, key); /* do a primitive set */
|
||||
if (!ttisnil(oldval) || /* result is no nil? */
|
||||
(tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */
|
||||
setobj2t(L, oldval, val);
|
||||
h->flags = 0;
|
||||
luaC_barriert(L, h, val);
|
||||
return;
|
||||
}
|
||||
/* else will try the tag method */
|
||||
}
|
||||
else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX)))
|
||||
luaG_typeerror(L, t, "index");
|
||||
if (ttisfunction(tm)) {
|
||||
callTM(L, tm, t, key, val);
|
||||
return;
|
||||
}
|
||||
/* else repeat with `tm' */
|
||||
setobj(L, &temp, tm); /* avoid pointing inside table (may rehash) */
|
||||
t = &temp;
|
||||
}
|
||||
luaG_runerror(L, "loop in settable");
|
||||
}
|
||||
|
||||
|
||||
static int call_binTM (lua_State *L, const TValue *p1, const TValue *p2,
|
||||
StkId res, TMS event) {
|
||||
const TValue *tm = luaT_gettmbyobj(L, p1, event); /* try first operand */
|
||||
if (ttisnil(tm))
|
||||
tm = luaT_gettmbyobj(L, p2, event); /* try second operand */
|
||||
if (ttisnil(tm)) return 0;
|
||||
callTMres(L, res, tm, p1, p2);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static const TValue *get_compTM (lua_State *L, Table *mt1, Table *mt2,
|
||||
TMS event) {
|
||||
const TValue *tm1 = fasttm(L, mt1, event);
|
||||
const TValue *tm2;
|
||||
if (tm1 == NULL) return NULL; /* no metamethod */
|
||||
if (mt1 == mt2) return tm1; /* same metatables => same metamethods */
|
||||
tm2 = fasttm(L, mt2, event);
|
||||
if (tm2 == NULL) return NULL; /* no metamethod */
|
||||
if (luaO_rawequalObj(tm1, tm2)) /* same metamethods? */
|
||||
return tm1;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
static int call_orderTM (lua_State *L, const TValue *p1, const TValue *p2,
|
||||
TMS event) {
|
||||
const TValue *tm1 = luaT_gettmbyobj(L, p1, event);
|
||||
const TValue *tm2;
|
||||
if (ttisnil(tm1)) return -1; /* no metamethod? */
|
||||
tm2 = luaT_gettmbyobj(L, p2, event);
|
||||
if (!luaO_rawequalObj(tm1, tm2)) /* different metamethods? */
|
||||
return -1;
|
||||
callTMres(L, L->top, tm1, p1, p2);
|
||||
return !l_isfalse(L->top);
|
||||
}
|
||||
|
||||
|
||||
static int l_strcmp (const TString *ls, const TString *rs) {
|
||||
const char *l = getstr(ls);
|
||||
size_t ll = ls->tsv.len;
|
||||
const char *r = getstr(rs);
|
||||
size_t lr = rs->tsv.len;
|
||||
for (;;) {
|
||||
int temp = strcoll(l, r);
|
||||
if (temp != 0) return temp;
|
||||
else { /* strings are equal up to a `\0' */
|
||||
size_t len = strlen(l); /* index of first `\0' in both strings */
|
||||
if (len == lr) /* r is finished? */
|
||||
return (len == ll) ? 0 : 1;
|
||||
else if (len == ll) /* l is finished? */
|
||||
return -1; /* l is smaller than r (because r is not finished) */
|
||||
/* both strings longer than `len'; go on comparing (after the `\0') */
|
||||
len++;
|
||||
l += len; ll -= len; r += len; lr -= len;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r) {
|
||||
int res;
|
||||
if (ttype(l) != ttype(r))
|
||||
return luaG_ordererror(L, l, r);
|
||||
else if (ttisnumber(l))
|
||||
return luai_numlt(nvalue(l), nvalue(r));
|
||||
else if (ttisstring(l))
|
||||
return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0;
|
||||
else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
|
||||
return res;
|
||||
return luaG_ordererror(L, l, r);
|
||||
}
|
||||
|
||||
|
||||
static int lessequal (lua_State *L, const TValue *l, const TValue *r) {
|
||||
int res;
|
||||
if (ttype(l) != ttype(r))
|
||||
return luaG_ordererror(L, l, r);
|
||||
else if (ttisnumber(l))
|
||||
return luai_numle(nvalue(l), nvalue(r));
|
||||
else if (ttisstring(l))
|
||||
return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0;
|
||||
else if ((res = call_orderTM(L, l, r, TM_LE)) != -1) /* first try `le' */
|
||||
return res;
|
||||
else if ((res = call_orderTM(L, r, l, TM_LT)) != -1) /* else try `lt' */
|
||||
return !res;
|
||||
return luaG_ordererror(L, l, r);
|
||||
}
|
||||
|
||||
|
||||
int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2) {
|
||||
const TValue *tm;
|
||||
lua_assert(ttype(t1) == ttype(t2));
|
||||
switch (ttype(t1)) {
|
||||
case LUA_TNIL: return 1;
|
||||
case LUA_TNUMBER: return luai_numeq(nvalue(t1), nvalue(t2));
|
||||
case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2); /* true must be 1 !! */
|
||||
case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);
|
||||
case LUA_TUSERDATA: {
|
||||
if (uvalue(t1) == uvalue(t2)) return 1;
|
||||
tm = get_compTM(L, uvalue(t1)->metatable, uvalue(t2)->metatable,
|
||||
TM_EQ);
|
||||
break; /* will try TM */
|
||||
}
|
||||
case LUA_TTABLE: {
|
||||
if (hvalue(t1) == hvalue(t2)) return 1;
|
||||
tm = get_compTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ);
|
||||
break; /* will try TM */
|
||||
}
|
||||
default: return gcvalue(t1) == gcvalue(t2);
|
||||
}
|
||||
if (tm == NULL) return 0; /* no TM? */
|
||||
callTMres(L, L->top, tm, t1, t2); /* call TM */
|
||||
return !l_isfalse(L->top);
|
||||
}
|
||||
|
||||
|
||||
void luaV_concat (lua_State *L, int total, int last) {
|
||||
do {
|
||||
StkId top = L->base + last + 1;
|
||||
int n = 2; /* number of elements handled in this pass (at least 2) */
|
||||
if (!(ttisstring(top-2) || ttisnumber(top-2)) || !tostring(L, top-1)) {
|
||||
if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
|
||||
luaG_concaterror(L, top-2, top-1);
|
||||
} else if (tsvalue(top-1)->len == 0) /* second op is empty? */
|
||||
(void)tostring(L, top - 2); /* result is first op (as string) */
|
||||
else {
|
||||
/* at least two string values; get as many as possible */
|
||||
size_t tl = tsvalue(top-1)->len;
|
||||
char *buffer;
|
||||
int i;
|
||||
/* collect total length */
|
||||
for (n = 1; n < total && tostring(L, top-n-1); n++) {
|
||||
size_t l = tsvalue(top-n-1)->len;
|
||||
if (l >= MAX_SIZET - tl) luaG_runerror(L, "string length overflow");
|
||||
tl += l;
|
||||
}
|
||||
buffer = luaZ_openspace(L, &G(L)->buff, tl);
|
||||
tl = 0;
|
||||
for (i=n; i>0; i--) { /* concat all strings */
|
||||
size_t l = tsvalue(top-i)->len;
|
||||
memcpy(buffer+tl, svalue(top-i), l);
|
||||
tl += l;
|
||||
}
|
||||
setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl));
|
||||
}
|
||||
total -= n-1; /* got `n' strings to create 1 new */
|
||||
last -= n-1;
|
||||
} while (total > 1); /* repeat until only 1 result left */
|
||||
}
|
||||
|
||||
|
||||
static void Arith (lua_State *L, StkId ra, const TValue *rb,
|
||||
const TValue *rc, TMS op) {
|
||||
TValue tempb, tempc;
|
||||
const TValue *b, *c;
|
||||
if ((b = luaV_tonumber(rb, &tempb)) != NULL &&
|
||||
(c = luaV_tonumber(rc, &tempc)) != NULL) {
|
||||
lua_Number nb = nvalue(b), nc = nvalue(c);
|
||||
switch (op) {
|
||||
case TM_ADD: setnvalue(ra, luai_numadd(nb, nc)); break;
|
||||
case TM_SUB: setnvalue(ra, luai_numsub(nb, nc)); break;
|
||||
case TM_MUL: setnvalue(ra, luai_nummul(nb, nc)); break;
|
||||
case TM_DIV: setnvalue(ra, luai_numdiv(nb, nc)); break;
|
||||
case TM_MOD: setnvalue(ra, luai_nummod(nb, nc)); break;
|
||||
case TM_POW: setnvalue(ra, luai_numpow(nb, nc)); break;
|
||||
case TM_UNM: setnvalue(ra, luai_numunm(nb)); break;
|
||||
default: lua_assert(0); break;
|
||||
}
|
||||
}
|
||||
else if (!call_binTM(L, rb, rc, ra, op))
|
||||
luaG_aritherror(L, rb, rc);
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** some macros for common tasks in `luaV_execute'
|
||||
*/
|
||||
|
||||
#define runtime_check(L, c) { if (!(c)) break; }
|
||||
|
||||
#define RA(i) (base+GETARG_A(i))
|
||||
/* to be used after possible stack reallocation */
|
||||
#define RB(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgR, base+GETARG_B(i))
|
||||
#define RC(i) check_exp(getCMode(GET_OPCODE(i)) == OpArgR, base+GETARG_C(i))
|
||||
#define RKB(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgK, \
|
||||
ISK(GETARG_B(i)) ? k+INDEXK(GETARG_B(i)) : base+GETARG_B(i))
|
||||
#define RKC(i) check_exp(getCMode(GET_OPCODE(i)) == OpArgK, \
|
||||
ISK(GETARG_C(i)) ? k+INDEXK(GETARG_C(i)) : base+GETARG_C(i))
|
||||
#define KBx(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgK, k+GETARG_Bx(i))
|
||||
|
||||
|
||||
#define dojump(L,pc,i) {(pc) += (i); luai_threadyield(L);}
|
||||
|
||||
|
||||
#define Protect(x) { L->savedpc = pc; {x;}; base = L->base; }
|
||||
|
||||
|
||||
#define arith_op(op,tm) { \
|
||||
TValue *rb = RKB(i); \
|
||||
TValue *rc = RKC(i); \
|
||||
if (ttisnumber(rb) && ttisnumber(rc)) { \
|
||||
lua_Number nb = nvalue(rb), nc = nvalue(rc); \
|
||||
setnvalue(ra, op(nb, nc)); \
|
||||
} \
|
||||
else \
|
||||
Protect(Arith(L, ra, rb, rc, tm)); \
|
||||
}
|
||||
|
||||
|
||||
|
||||
void luaV_execute (lua_State *L, int nexeccalls) {
|
||||
LClosure *cl;
|
||||
StkId base;
|
||||
TValue *k;
|
||||
const Instruction *pc;
|
||||
reentry: /* entry point */
|
||||
lua_assert(isLua(L->ci));
|
||||
pc = L->savedpc;
|
||||
cl = &clvalue(L->ci->func)->l;
|
||||
base = L->base;
|
||||
k = cl->p->k;
|
||||
/* main loop of interpreter */
|
||||
for (;;) {
|
||||
const Instruction i = *pc++;
|
||||
StkId ra;
|
||||
if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) &&
|
||||
(--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) {
|
||||
traceexec(L, pc);
|
||||
if (L->status == LUA_YIELD) { /* did hook yield? */
|
||||
L->savedpc = pc - 1;
|
||||
return;
|
||||
}
|
||||
base = L->base;
|
||||
}
|
||||
/* warning!! several calls may realloc the stack and invalidate `ra' */
|
||||
ra = RA(i);
|
||||
lua_assert(base == L->base && L->base == L->ci->base);
|
||||
lua_assert(base <= L->top && L->top <= L->stack + L->stacksize);
|
||||
lua_assert(L->top == L->ci->top || luaG_checkopenop(i));
|
||||
switch (GET_OPCODE(i)) {
|
||||
case OP_MOVE: {
|
||||
setobjs2s(L, ra, RB(i));
|
||||
continue;
|
||||
}
|
||||
case OP_LOADK: {
|
||||
setobj2s(L, ra, KBx(i));
|
||||
continue;
|
||||
}
|
||||
case OP_LOADBOOL: {
|
||||
setbvalue(ra, GETARG_B(i));
|
||||
if (GETARG_C(i)) pc++; /* skip next instruction (if C) */
|
||||
continue;
|
||||
}
|
||||
case OP_LOADNIL: {
|
||||
TValue *rb = RB(i);
|
||||
do {
|
||||
setnilvalue(rb--);
|
||||
} while (rb >= ra);
|
||||
continue;
|
||||
}
|
||||
case OP_GETUPVAL: {
|
||||
int b = GETARG_B(i);
|
||||
setobj2s(L, ra, cl->upvals[b]->v);
|
||||
continue;
|
||||
}
|
||||
case OP_GETGLOBAL: {
|
||||
TValue g;
|
||||
TValue *rb = KBx(i);
|
||||
sethvalue(L, &g, cl->env);
|
||||
lua_assert(ttisstring(rb));
|
||||
Protect(luaV_gettable(L, &g, rb, ra));
|
||||
continue;
|
||||
}
|
||||
case OP_GETTABLE: {
|
||||
Protect(luaV_gettable(L, RB(i), RKC(i), ra));
|
||||
continue;
|
||||
}
|
||||
case OP_SETGLOBAL: {
|
||||
TValue g;
|
||||
sethvalue(L, &g, cl->env);
|
||||
lua_assert(ttisstring(KBx(i)));
|
||||
Protect(luaV_settable(L, &g, KBx(i), ra));
|
||||
continue;
|
||||
}
|
||||
case OP_SETUPVAL: {
|
||||
UpVal *uv = cl->upvals[GETARG_B(i)];
|
||||
setobj(L, uv->v, ra);
|
||||
luaC_barrier(L, uv, ra);
|
||||
continue;
|
||||
}
|
||||
case OP_SETTABLE: {
|
||||
Protect(luaV_settable(L, ra, RKB(i), RKC(i)));
|
||||
continue;
|
||||
}
|
||||
case OP_NEWTABLE: {
|
||||
int b = GETARG_B(i);
|
||||
int c = GETARG_C(i);
|
||||
sethvalue(L, ra, luaH_new(L, luaO_fb2int(b), luaO_fb2int(c)));
|
||||
Protect(luaC_checkGC(L));
|
||||
continue;
|
||||
}
|
||||
case OP_SELF: {
|
||||
StkId rb = RB(i);
|
||||
setobjs2s(L, ra+1, rb);
|
||||
Protect(luaV_gettable(L, rb, RKC(i), ra));
|
||||
continue;
|
||||
}
|
||||
case OP_ADD: {
|
||||
arith_op(luai_numadd, TM_ADD);
|
||||
continue;
|
||||
}
|
||||
case OP_SUB: {
|
||||
arith_op(luai_numsub, TM_SUB);
|
||||
continue;
|
||||
}
|
||||
case OP_MUL: {
|
||||
arith_op(luai_nummul, TM_MUL);
|
||||
continue;
|
||||
}
|
||||
case OP_DIV: {
|
||||
arith_op(luai_numdiv, TM_DIV);
|
||||
continue;
|
||||
}
|
||||
case OP_MOD: {
|
||||
arith_op(luai_nummod, TM_MOD);
|
||||
continue;
|
||||
}
|
||||
case OP_POW: {
|
||||
arith_op(luai_numpow, TM_POW);
|
||||
continue;
|
||||
}
|
||||
case OP_UNM: {
|
||||
TValue *rb = RB(i);
|
||||
if (ttisnumber(rb)) {
|
||||
lua_Number nb = nvalue(rb);
|
||||
setnvalue(ra, luai_numunm(nb));
|
||||
}
|
||||
else {
|
||||
Protect(Arith(L, ra, rb, rb, TM_UNM));
|
||||
}
|
||||
continue;
|
||||
}
|
||||
case OP_NOT: {
|
||||
int res = l_isfalse(RB(i)); /* next assignment may change this value */
|
||||
setbvalue(ra, res);
|
||||
continue;
|
||||
}
|
||||
case OP_LEN: {
|
||||
const TValue *rb = RB(i);
|
||||
switch (ttype(rb)) {
|
||||
case LUA_TTABLE: {
|
||||
setnvalue(ra, cast_num(luaH_getn(hvalue(rb))));
|
||||
break;
|
||||
}
|
||||
case LUA_TSTRING: {
|
||||
setnvalue(ra, cast_num(tsvalue(rb)->len));
|
||||
break;
|
||||
}
|
||||
default: { /* try metamethod */
|
||||
Protect(
|
||||
if (!call_binTM(L, rb, luaO_nilobject, ra, TM_LEN))
|
||||
luaG_typeerror(L, rb, "get length of");
|
||||
)
|
||||
}
|
||||
}
|
||||
continue;
|
||||
}
|
||||
case OP_CONCAT: {
|
||||
int b = GETARG_B(i);
|
||||
int c = GETARG_C(i);
|
||||
Protect(luaV_concat(L, c-b+1, c); luaC_checkGC(L));
|
||||
setobjs2s(L, RA(i), base+b);
|
||||
continue;
|
||||
}
|
||||
case OP_JMP: {
|
||||
dojump(L, pc, GETARG_sBx(i));
|
||||
continue;
|
||||
}
|
||||
case OP_EQ: {
|
||||
TValue *rb = RKB(i);
|
||||
TValue *rc = RKC(i);
|
||||
Protect(
|
||||
if (equalobj(L, rb, rc) == GETARG_A(i))
|
||||
dojump(L, pc, GETARG_sBx(*pc));
|
||||
)
|
||||
pc++;
|
||||
continue;
|
||||
}
|
||||
case OP_LT: {
|
||||
Protect(
|
||||
if (luaV_lessthan(L, RKB(i), RKC(i)) == GETARG_A(i))
|
||||
dojump(L, pc, GETARG_sBx(*pc));
|
||||
)
|
||||
pc++;
|
||||
continue;
|
||||
}
|
||||
case OP_LE: {
|
||||
Protect(
|
||||
if (lessequal(L, RKB(i), RKC(i)) == GETARG_A(i))
|
||||
dojump(L, pc, GETARG_sBx(*pc));
|
||||
)
|
||||
pc++;
|
||||
continue;
|
||||
}
|
||||
case OP_TEST: {
|
||||
if (l_isfalse(ra) != GETARG_C(i))
|
||||
dojump(L, pc, GETARG_sBx(*pc));
|
||||
pc++;
|
||||
continue;
|
||||
}
|
||||
case OP_TESTSET: {
|
||||
TValue *rb = RB(i);
|
||||
if (l_isfalse(rb) != GETARG_C(i)) {
|
||||
setobjs2s(L, ra, rb);
|
||||
dojump(L, pc, GETARG_sBx(*pc));
|
||||
}
|
||||
pc++;
|
||||
continue;
|
||||
}
|
||||
case OP_CALL: {
|
||||
int b = GETARG_B(i);
|
||||
int nresults = GETARG_C(i) - 1;
|
||||
if (b != 0) L->top = ra+b; /* else previous instruction set top */
|
||||
L->savedpc = pc;
|
||||
switch (luaD_precall(L, ra, nresults)) {
|
||||
case PCRLUA: {
|
||||
nexeccalls++;
|
||||
goto reentry; /* restart luaV_execute over new Lua function */
|
||||
}
|
||||
case PCRC: {
|
||||
/* it was a C function (`precall' called it); adjust results */
|
||||
if (nresults >= 0) L->top = L->ci->top;
|
||||
base = L->base;
|
||||
continue;
|
||||
}
|
||||
default: {
|
||||
return; /* yield */
|
||||
}
|
||||
}
|
||||
}
|
||||
case OP_TAILCALL: {
|
||||
int b = GETARG_B(i);
|
||||
if (b != 0) L->top = ra+b; /* else previous instruction set top */
|
||||
L->savedpc = pc;
|
||||
lua_assert(GETARG_C(i) - 1 == LUA_MULTRET);
|
||||
switch (luaD_precall(L, ra, LUA_MULTRET)) {
|
||||
case PCRLUA: {
|
||||
/* tail call: put new frame in place of previous one */
|
||||
CallInfo *ci = L->ci - 1; /* previous frame */
|
||||
int aux;
|
||||
StkId func = ci->func;
|
||||
StkId pfunc = (ci+1)->func; /* previous function index */
|
||||
if (L->openupval) luaF_close(L, ci->base);
|
||||
L->base = ci->base = ci->func + ((ci+1)->base - pfunc);
|
||||
for (aux = 0; pfunc+aux < L->top; aux++) /* move frame down */
|
||||
setobjs2s(L, func+aux, pfunc+aux);
|
||||
ci->top = L->top = func+aux; /* correct top */
|
||||
lua_assert(L->top == L->base + clvalue(func)->l.p->maxstacksize);
|
||||
ci->savedpc = L->savedpc;
|
||||
ci->tailcalls++; /* one more call lost */
|
||||
L->ci--; /* remove new frame */
|
||||
goto reentry;
|
||||
}
|
||||
case PCRC: { /* it was a C function (`precall' called it) */
|
||||
base = L->base;
|
||||
continue;
|
||||
}
|
||||
default: {
|
||||
return; /* yield */
|
||||
}
|
||||
}
|
||||
}
|
||||
case OP_RETURN: {
|
||||
int b = GETARG_B(i);
|
||||
if (b != 0) L->top = ra+b-1;
|
||||
if (L->openupval) luaF_close(L, base);
|
||||
L->savedpc = pc;
|
||||
b = luaD_poscall(L, ra);
|
||||
if (--nexeccalls == 0) /* was previous function running `here'? */
|
||||
return; /* no: return */
|
||||
else { /* yes: continue its execution */
|
||||
if (b) L->top = L->ci->top;
|
||||
lua_assert(isLua(L->ci));
|
||||
lua_assert(GET_OPCODE(*((L->ci)->savedpc - 1)) == OP_CALL);
|
||||
goto reentry;
|
||||
}
|
||||
}
|
||||
case OP_FORLOOP: {
|
||||
lua_Number step = nvalue(ra+2);
|
||||
lua_Number idx = luai_numadd(nvalue(ra), step); /* increment index */
|
||||
lua_Number limit = nvalue(ra+1);
|
||||
if (luai_numlt(0, step) ? luai_numle(idx, limit)
|
||||
: luai_numle(limit, idx)) {
|
||||
dojump(L, pc, GETARG_sBx(i)); /* jump back */
|
||||
setnvalue(ra, idx); /* update internal index... */
|
||||
setnvalue(ra+3, idx); /* ...and external index */
|
||||
}
|
||||
continue;
|
||||
}
|
||||
case OP_FORPREP: {
|
||||
const TValue *init = ra;
|
||||
const TValue *plimit = ra+1;
|
||||
const TValue *pstep = ra+2;
|
||||
L->savedpc = pc; /* next steps may throw errors */
|
||||
if (!tonumber(init, ra))
|
||||
luaG_runerror(L, LUA_QL("for") " initial value must be a number");
|
||||
else if (!tonumber(plimit, ra+1))
|
||||
luaG_runerror(L, LUA_QL("for") " limit must be a number");
|
||||
else if (!tonumber(pstep, ra+2))
|
||||
luaG_runerror(L, LUA_QL("for") " step must be a number");
|
||||
setnvalue(ra, luai_numsub(nvalue(ra), nvalue(pstep)));
|
||||
dojump(L, pc, GETARG_sBx(i));
|
||||
continue;
|
||||
}
|
||||
case OP_TFORLOOP: {
|
||||
StkId cb = ra + 3; /* call base */
|
||||
setobjs2s(L, cb+2, ra+2);
|
||||
setobjs2s(L, cb+1, ra+1);
|
||||
setobjs2s(L, cb, ra);
|
||||
L->top = cb+3; /* func. + 2 args (state and index) */
|
||||
Protect(luaD_call(L, cb, GETARG_C(i)));
|
||||
L->top = L->ci->top;
|
||||
cb = RA(i) + 3; /* previous call may change the stack */
|
||||
if (!ttisnil(cb)) { /* continue loop? */
|
||||
setobjs2s(L, cb-1, cb); /* save control variable */
|
||||
dojump(L, pc, GETARG_sBx(*pc)); /* jump back */
|
||||
}
|
||||
pc++;
|
||||
continue;
|
||||
}
|
||||
case OP_SETLIST: {
|
||||
int n = GETARG_B(i);
|
||||
int c = GETARG_C(i);
|
||||
int last;
|
||||
Table *h;
|
||||
if (n == 0) {
|
||||
n = cast_int(L->top - ra) - 1;
|
||||
L->top = L->ci->top;
|
||||
}
|
||||
if (c == 0) c = cast_int(*pc++);
|
||||
runtime_check(L, ttistable(ra));
|
||||
h = hvalue(ra);
|
||||
last = ((c-1)*LFIELDS_PER_FLUSH) + n;
|
||||
if (last > h->sizearray) /* needs more space? */
|
||||
luaH_resizearray(L, h, last); /* pre-alloc it at once */
|
||||
for (; n > 0; n--) {
|
||||
TValue *val = ra+n;
|
||||
setobj2t(L, luaH_setnum(L, h, last--), val);
|
||||
luaC_barriert(L, h, val);
|
||||
}
|
||||
continue;
|
||||
}
|
||||
case OP_CLOSE: {
|
||||
luaF_close(L, ra);
|
||||
continue;
|
||||
}
|
||||
case OP_CLOSURE: {
|
||||
Proto *p;
|
||||
Closure *ncl;
|
||||
int nup, j;
|
||||
p = cl->p->p[GETARG_Bx(i)];
|
||||
nup = p->nups;
|
||||
ncl = luaF_newLclosure(L, nup, cl->env);
|
||||
ncl->l.p = p;
|
||||
for (j=0; j<nup; j++, pc++) {
|
||||
if (GET_OPCODE(*pc) == OP_GETUPVAL)
|
||||
ncl->l.upvals[j] = cl->upvals[GETARG_B(*pc)];
|
||||
else {
|
||||
lua_assert(GET_OPCODE(*pc) == OP_MOVE);
|
||||
ncl->l.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc));
|
||||
}
|
||||
}
|
||||
setclvalue(L, ra, ncl);
|
||||
Protect(luaC_checkGC(L));
|
||||
continue;
|
||||
}
|
||||
case OP_VARARG: {
|
||||
int b = GETARG_B(i) - 1;
|
||||
int j;
|
||||
CallInfo *ci = L->ci;
|
||||
int n = cast_int(ci->base - ci->func) - cl->p->numparams - 1;
|
||||
if (b == LUA_MULTRET) {
|
||||
Protect(luaD_checkstack(L, n));
|
||||
ra = RA(i); /* previous call may change the stack */
|
||||
b = n;
|
||||
L->top = ra + n;
|
||||
}
|
||||
for (j = 0; j < b; j++) {
|
||||
if (j < n) {
|
||||
setobjs2s(L, ra + j, ci->base - n + j);
|
||||
}
|
||||
else {
|
||||
setnilvalue(ra + j);
|
||||
}
|
||||
}
|
||||
continue;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -1,36 +0,0 @@
|
|||
/*
|
||||
** $Id: lvm.h,v 2.5.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Lua virtual machine
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#ifndef lvm_h
|
||||
#define lvm_h
|
||||
|
||||
|
||||
#include "ldo.h"
|
||||
#include "lobject.h"
|
||||
#include "ltm.h"
|
||||
|
||||
|
||||
#define tostring(L,o) ((ttype(o) == LUA_TSTRING) || (luaV_tostring(L, o)))
|
||||
|
||||
#define tonumber(o,n) (ttype(o) == LUA_TNUMBER || \
|
||||
(((o) = luaV_tonumber(o,n)) != NULL))
|
||||
|
||||
#define equalobj(L,o1,o2) \
|
||||
(ttype(o1) == ttype(o2) && luaV_equalval(L, o1, o2))
|
||||
|
||||
|
||||
LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
|
||||
LUAI_FUNC int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2);
|
||||
LUAI_FUNC const TValue *luaV_tonumber (const TValue *obj, TValue *n);
|
||||
LUAI_FUNC int luaV_tostring (lua_State *L, StkId obj);
|
||||
LUAI_FUNC void luaV_gettable (lua_State *L, const TValue *t, TValue *key,
|
||||
StkId val);
|
||||
LUAI_FUNC void luaV_settable (lua_State *L, const TValue *t, TValue *key,
|
||||
StkId val);
|
||||
LUAI_FUNC void luaV_execute (lua_State *L, int nexeccalls);
|
||||
LUAI_FUNC void luaV_concat (lua_State *L, int total, int last);
|
||||
|
||||
#endif
|
|
@ -1,82 +0,0 @@
|
|||
/*
|
||||
** $Id: lzio.c,v 1.31.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** a generic input stream interface
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <string.h>
|
||||
|
||||
#define lzio_c
|
||||
#define LUA_CORE
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "llimits.h"
|
||||
#include "lmem.h"
|
||||
#include "lstate.h"
|
||||
#include "lzio.h"
|
||||
|
||||
|
||||
int luaZ_fill (ZIO *z) {
|
||||
size_t size;
|
||||
lua_State *L = z->L;
|
||||
const char *buff;
|
||||
lua_unlock(L);
|
||||
buff = z->reader(L, z->data, &size);
|
||||
lua_lock(L);
|
||||
if (buff == NULL || size == 0) return EOZ;
|
||||
z->n = size - 1;
|
||||
z->p = buff;
|
||||
return char2int(*(z->p++));
|
||||
}
|
||||
|
||||
|
||||
int luaZ_lookahead (ZIO *z) {
|
||||
if (z->n == 0) {
|
||||
if (luaZ_fill(z) == EOZ)
|
||||
return EOZ;
|
||||
else {
|
||||
z->n++; /* luaZ_fill removed first byte; put back it */
|
||||
z->p--;
|
||||
}
|
||||
}
|
||||
return char2int(*z->p);
|
||||
}
|
||||
|
||||
|
||||
void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, void *data) {
|
||||
z->L = L;
|
||||
z->reader = reader;
|
||||
z->data = data;
|
||||
z->n = 0;
|
||||
z->p = NULL;
|
||||
}
|
||||
|
||||
|
||||
/* --------------------------------------------------------------- read --- */
|
||||
size_t luaZ_read (ZIO *z, void *b, size_t n) {
|
||||
while (n) {
|
||||
size_t m;
|
||||
if (luaZ_lookahead(z) == EOZ)
|
||||
return n; /* return number of missing bytes */
|
||||
m = (n <= z->n) ? n : z->n; /* min. between n and z->n */
|
||||
memcpy(b, z->p, m);
|
||||
z->n -= m;
|
||||
z->p += m;
|
||||
b = (char *)b + m;
|
||||
n -= m;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* ------------------------------------------------------------------------ */
|
||||
char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) {
|
||||
if (n > buff->buffsize) {
|
||||
if (n < LUA_MINBUFFER) n = LUA_MINBUFFER;
|
||||
luaZ_resizebuffer(L, buff, n);
|
||||
}
|
||||
return buff->buffer;
|
||||
}
|
||||
|
||||
|
|
@ -1,67 +0,0 @@
|
|||
/*
|
||||
** $Id: lzio.h,v 1.21.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Buffered streams
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#ifndef lzio_h
|
||||
#define lzio_h
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lmem.h"
|
||||
|
||||
|
||||
#define EOZ (-1) /* end of stream */
|
||||
|
||||
typedef struct Zio ZIO;
|
||||
|
||||
#define char2int(c) cast(int, cast(unsigned char, (c)))
|
||||
|
||||
#define zgetc(z) (((z)->n--)>0 ? char2int(*(z)->p++) : luaZ_fill(z))
|
||||
|
||||
typedef struct Mbuffer {
|
||||
char *buffer;
|
||||
size_t n;
|
||||
size_t buffsize;
|
||||
} Mbuffer;
|
||||
|
||||
#define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0)
|
||||
|
||||
#define luaZ_buffer(buff) ((buff)->buffer)
|
||||
#define luaZ_sizebuffer(buff) ((buff)->buffsize)
|
||||
#define luaZ_bufflen(buff) ((buff)->n)
|
||||
|
||||
#define luaZ_resetbuffer(buff) ((buff)->n = 0)
|
||||
|
||||
|
||||
#define luaZ_resizebuffer(L, buff, size) \
|
||||
(luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \
|
||||
(buff)->buffsize = size)
|
||||
|
||||
#define luaZ_freebuffer(L, buff) luaZ_resizebuffer(L, buff, 0)
|
||||
|
||||
|
||||
LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);
|
||||
LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,
|
||||
void *data);
|
||||
LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */
|
||||
LUAI_FUNC int luaZ_lookahead (ZIO *z);
|
||||
|
||||
|
||||
|
||||
/* --------- Private Part ------------------ */
|
||||
|
||||
struct Zio {
|
||||
size_t n; /* bytes still unread */
|
||||
const char *p; /* current position in buffer */
|
||||
lua_Reader reader;
|
||||
void* data; /* additional data */
|
||||
lua_State *L; /* Lua state (for reader) */
|
||||
};
|
||||
|
||||
|
||||
LUAI_FUNC int luaZ_fill (ZIO *z);
|
||||
|
||||
#endif
|
386
src/main.c
386
src/main.c
|
@ -1,386 +0,0 @@
|
|||
#include <signal.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#define lua_c
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lauxlib.h"
|
||||
#include "lualib.h"
|
||||
|
||||
|
||||
|
||||
static lua_State *globalL = NULL;
|
||||
|
||||
static const char *progname = LUA_PROGNAME;
|
||||
|
||||
|
||||
|
||||
static void lstop (lua_State *L, lua_Debug *ar) {
|
||||
(void)ar; /* unused arg. */
|
||||
lua_sethook(L, NULL, 0, 0);
|
||||
luaL_error(L, "interrupted!");
|
||||
}
|
||||
|
||||
|
||||
static void laction (int i) {
|
||||
signal(i, SIG_DFL); /* if another SIGINT happens before lstop,
|
||||
terminate process (default action) */
|
||||
lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
|
||||
}
|
||||
|
||||
|
||||
static void print_usage (void) {
|
||||
fprintf(stderr,
|
||||
"usage: %s [options] [script [args]].\n"
|
||||
"Available options are:\n"
|
||||
" -e stat execute string " LUA_QL("stat") "\n"
|
||||
" -l name require library " LUA_QL("name") "\n"
|
||||
" -i enter interactive mode after executing " LUA_QL("script") "\n"
|
||||
" -v show version information\n"
|
||||
" -- stop handling options\n"
|
||||
" - execute stdin and stop handling options\n"
|
||||
,
|
||||
progname);
|
||||
fflush(stderr);
|
||||
}
|
||||
|
||||
|
||||
static void l_message (const char *pname, const char *msg) {
|
||||
if (pname) fprintf(stderr, "%s: ", pname);
|
||||
fprintf(stderr, "%s\n", msg);
|
||||
fflush(stderr);
|
||||
}
|
||||
|
||||
|
||||
static int report (lua_State *L, int status) {
|
||||
if (status && !lua_isnil(L, -1)) {
|
||||
const char *msg = lua_tostring(L, -1);
|
||||
if (msg == NULL) msg = "(error object is not a string)";
|
||||
l_message(progname, msg);
|
||||
lua_pop(L, 1);
|
||||
}
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
static int traceback (lua_State *L) {
|
||||
if (!lua_isstring(L, 1)) /* 'message' not a string? */
|
||||
return 1; /* keep it intact */
|
||||
lua_getfield(L, LUA_GLOBALSINDEX, "debug");
|
||||
if (!lua_istable(L, -1)) {
|
||||
lua_pop(L, 1);
|
||||
return 1;
|
||||
}
|
||||
lua_getfield(L, -1, "traceback");
|
||||
if (!lua_isfunction(L, -1)) {
|
||||
lua_pop(L, 2);
|
||||
return 1;
|
||||
}
|
||||
lua_pushvalue(L, 1); /* pass error message */
|
||||
lua_pushinteger(L, 2); /* skip this function and traceback */
|
||||
lua_call(L, 2, 1); /* call debug.traceback */
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int docall (lua_State *L, int narg, int clear) {
|
||||
int status;
|
||||
int base = lua_gettop(L) - narg; /* function index */
|
||||
lua_pushcfunction(L, traceback); /* push traceback function */
|
||||
lua_insert(L, base); /* put it under chunk and args */
|
||||
signal(SIGINT, laction);
|
||||
status = lua_pcall(L, narg, (clear ? 0 : LUA_MULTRET), base);
|
||||
signal(SIGINT, SIG_DFL);
|
||||
lua_remove(L, base); /* remove traceback function */
|
||||
/* force a complete garbage collection in case of errors */
|
||||
if (status != 0) lua_gc(L, LUA_GCCOLLECT, 0);
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
static void print_version (void) {
|
||||
l_message(NULL, LUA_RELEASE " " LUA_COPYRIGHT);
|
||||
}
|
||||
|
||||
|
||||
static int getargs (lua_State *L, char **argv, int n) {
|
||||
int narg;
|
||||
int i;
|
||||
int argc = 0;
|
||||
while (argv[argc]) argc++; /* count total number of arguments */
|
||||
narg = argc - (n + 1); /* number of arguments to the script */
|
||||
luaL_checkstack(L, narg + 3, "too many arguments to script");
|
||||
for (i=n+1; i < argc; i++)
|
||||
lua_pushstring(L, argv[i]);
|
||||
lua_createtable(L, narg, n + 1);
|
||||
for (i=0; i < argc; i++) {
|
||||
lua_pushstring(L, argv[i]);
|
||||
lua_rawseti(L, -2, i - n);
|
||||
}
|
||||
return narg;
|
||||
}
|
||||
|
||||
|
||||
static int dofile (lua_State *L, const char *name) {
|
||||
int status = luaL_loadfile(L, name) || docall(L, 0, 1);
|
||||
return report(L, status);
|
||||
}
|
||||
|
||||
|
||||
static int dostring (lua_State *L, const char *s, const char *name) {
|
||||
int status = luaL_loadbuffer(L, s, strlen(s), name) || docall(L, 0, 1);
|
||||
return report(L, status);
|
||||
}
|
||||
|
||||
|
||||
static int dolibrary (lua_State *L, const char *name) {
|
||||
lua_getglobal(L, "require");
|
||||
lua_pushstring(L, name);
|
||||
return report(L, docall(L, 1, 1));
|
||||
}
|
||||
|
||||
|
||||
static const char *get_prompt (lua_State *L, int firstline) {
|
||||
const char *p;
|
||||
lua_getfield(L, LUA_GLOBALSINDEX, firstline ? "_PROMPT" : "_PROMPT2");
|
||||
p = lua_tostring(L, -1);
|
||||
if (p == NULL) p = (firstline ? LUA_PROMPT : LUA_PROMPT2);
|
||||
lua_pop(L, 1); /* remove global */
|
||||
return p;
|
||||
}
|
||||
|
||||
|
||||
static int incomplete (lua_State *L, int status) {
|
||||
if (status == LUA_ERRSYNTAX) {
|
||||
size_t lmsg;
|
||||
const char *msg = lua_tolstring(L, -1, &lmsg);
|
||||
const char *tp = msg + lmsg - (sizeof(LUA_QL("<eof>")) - 1);
|
||||
if (strstr(msg, LUA_QL("<eof>")) == tp) {
|
||||
lua_pop(L, 1);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
return 0; /* else... */
|
||||
}
|
||||
|
||||
|
||||
static int pushline (lua_State *L, int firstline) {
|
||||
char buffer[LUA_MAXINPUT];
|
||||
char *b = buffer;
|
||||
size_t l;
|
||||
const char *prmt = get_prompt(L, firstline);
|
||||
if (lua_readline(L, b, prmt) == 0)
|
||||
return 0; /* no input */
|
||||
l = strlen(b);
|
||||
if (l > 0 && b[l-1] == '\n') /* line ends with newline? */
|
||||
b[l-1] = '\0'; /* remove it */
|
||||
if (firstline && b[0] == '=') /* first line starts with `=' ? */
|
||||
lua_pushfstring(L, "return %s", b+1); /* change it to `return' */
|
||||
else
|
||||
lua_pushstring(L, b);
|
||||
lua_freeline(L, b);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int loadline (lua_State *L) {
|
||||
int status;
|
||||
lua_settop(L, 0);
|
||||
if (!pushline(L, 1))
|
||||
return -1; /* no input */
|
||||
for (;;) { /* repeat until gets a complete line */
|
||||
status = luaL_loadbuffer(L, lua_tostring(L, 1), lua_strlen(L, 1), "=stdin");
|
||||
if (!incomplete(L, status)) break; /* cannot try to add lines? */
|
||||
if (!pushline(L, 0)) /* no more input? */
|
||||
return -1;
|
||||
lua_pushliteral(L, "\n"); /* add a new line... */
|
||||
lua_insert(L, -2); /* ...between the two lines */
|
||||
lua_concat(L, 3); /* join them */
|
||||
}
|
||||
lua_saveline(L, 1);
|
||||
lua_remove(L, 1); /* remove line */
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
static void dotty (lua_State *L) {
|
||||
int status;
|
||||
const char *oldprogname = progname;
|
||||
progname = NULL;
|
||||
while ((status = loadline(L)) != -1) {
|
||||
if (status == 0) status = docall(L, 0, 0);
|
||||
report(L, status);
|
||||
if (status == 0 && lua_gettop(L) > 0) { /* any result to print? */
|
||||
lua_getglobal(L, "print");
|
||||
lua_insert(L, 1);
|
||||
if (lua_pcall(L, lua_gettop(L)-1, 0, 0) != 0)
|
||||
l_message(progname, lua_pushfstring(L,
|
||||
"error calling " LUA_QL("print") " (%s)",
|
||||
lua_tostring(L, -1)));
|
||||
}
|
||||
}
|
||||
lua_settop(L, 0); /* clear stack */
|
||||
fputs("\n", stdout);
|
||||
fflush(stdout);
|
||||
progname = oldprogname;
|
||||
}
|
||||
|
||||
|
||||
static int handle_script (lua_State *L, char **argv, int n) {
|
||||
int status;
|
||||
const char *fname;
|
||||
int narg = getargs(L, argv, n); /* collect arguments */
|
||||
lua_setglobal(L, "arg");
|
||||
fname = argv[n];
|
||||
if (strcmp(fname, "-") == 0 && strcmp(argv[n-1], "--") != 0)
|
||||
fname = NULL; /* stdin */
|
||||
status = luaL_loadfile(L, fname);
|
||||
lua_insert(L, -(narg+1));
|
||||
if (status == 0)
|
||||
status = docall(L, narg, 0);
|
||||
else
|
||||
lua_pop(L, narg);
|
||||
return report(L, status);
|
||||
}
|
||||
|
||||
|
||||
/* check that argument has no extra characters at the end */
|
||||
#define notail(x) {if ((x)[2] != '\0') return -1;}
|
||||
|
||||
|
||||
static int collectargs (char **argv, int *pi, int *pv, int *pe) {
|
||||
int i;
|
||||
for (i = 1; argv[i] != NULL; i++) {
|
||||
if (argv[i][0] != '-') /* not an option? */
|
||||
return i;
|
||||
switch (argv[i][1]) { /* option */
|
||||
case '-':
|
||||
notail(argv[i]);
|
||||
return (argv[i+1] != NULL ? i+1 : 0);
|
||||
case '\0':
|
||||
return i;
|
||||
case 'i':
|
||||
notail(argv[i]);
|
||||
*pi = 1; /* go through */
|
||||
case 'v':
|
||||
notail(argv[i]);
|
||||
*pv = 1;
|
||||
break;
|
||||
case 'e':
|
||||
*pe = 1; /* go through */
|
||||
case 'l':
|
||||
if (argv[i][2] == '\0') {
|
||||
i++;
|
||||
if (argv[i] == NULL) return -1;
|
||||
}
|
||||
break;
|
||||
default: return -1; /* invalid option */
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int runargs (lua_State *L, char **argv, int n) {
|
||||
int i;
|
||||
for (i = 1; i < n; i++) {
|
||||
if (argv[i] == NULL) continue;
|
||||
lua_assert(argv[i][0] == '-');
|
||||
switch (argv[i][1]) { /* option */
|
||||
case 'e': {
|
||||
const char *chunk = argv[i] + 2;
|
||||
if (*chunk == '\0') chunk = argv[++i];
|
||||
lua_assert(chunk != NULL);
|
||||
if (dostring(L, chunk, "=(command line)") != 0)
|
||||
return 1;
|
||||
break;
|
||||
}
|
||||
case 'l': {
|
||||
const char *filename = argv[i] + 2;
|
||||
if (*filename == '\0') filename = argv[++i];
|
||||
lua_assert(filename != NULL);
|
||||
if (dolibrary(L, filename))
|
||||
return 1; /* stop if file fails */
|
||||
break;
|
||||
}
|
||||
default: break;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int handle_luainit (lua_State *L) {
|
||||
const char *init = getenv(LUA_INIT);
|
||||
if (init == NULL) return 0; /* status OK */
|
||||
else if (init[0] == '@')
|
||||
return dofile(L, init+1);
|
||||
else
|
||||
return dostring(L, init, "=" LUA_INIT);
|
||||
}
|
||||
|
||||
|
||||
struct Smain {
|
||||
int argc;
|
||||
char **argv;
|
||||
int status;
|
||||
};
|
||||
|
||||
|
||||
static int pmain (lua_State *L) {
|
||||
struct Smain *s = (struct Smain *)lua_touserdata(L, 1);
|
||||
char **argv = s->argv;
|
||||
int script;
|
||||
int has_i = 0, has_v = 0, has_e = 0;
|
||||
globalL = L;
|
||||
if (argv[0] && argv[0][0]) progname = argv[0];
|
||||
lua_gc(L, LUA_GCSTOP, 0); /* stop collector during initialization */
|
||||
luaL_openlibs(L); /* open libraries */
|
||||
lua_gc(L, LUA_GCRESTART, 0);
|
||||
s->status = handle_luainit(L);
|
||||
if (s->status != 0) return 0;
|
||||
script = collectargs(argv, &has_i, &has_v, &has_e);
|
||||
if (script < 0) { /* invalid args? */
|
||||
print_usage();
|
||||
s->status = 1;
|
||||
return 0;
|
||||
}
|
||||
if (has_v) print_version();
|
||||
s->status = runargs(L, argv, (script > 0) ? script : s->argc);
|
||||
if (s->status != 0) return 0;
|
||||
if (script)
|
||||
s->status = handle_script(L, argv, script);
|
||||
if (s->status != 0) return 0;
|
||||
if (has_i)
|
||||
dotty(L);
|
||||
else if (script == 0 && !has_e && !has_v) {
|
||||
if (lua_stdin_is_tty()) {
|
||||
print_version();
|
||||
dotty(L);
|
||||
}
|
||||
else dofile(L, NULL); /* executes stdin as a file */
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int main (int argc, char **argv) {
|
||||
int status;
|
||||
struct Smain s;
|
||||
lua_State *L = lua_open(); /* create state */
|
||||
if (L == NULL) {
|
||||
l_message(argv[0], "cannot create state: not enough memory");
|
||||
return EXIT_FAILURE;
|
||||
}
|
||||
s.argc = argc;
|
||||
s.argv = argv;
|
||||
status = lua_cpcall(L, &pmain, &s);
|
||||
report(L, status);
|
||||
lua_close(L);
|
||||
return (status || s.status) ? EXIT_FAILURE : EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
|
277
src/metalua.lua
277
src/metalua.lua
|
@ -1,277 +0,0 @@
|
|||
#! /usr/bin/env lua51
|
||||
-------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
-- Survive lack of checks
|
||||
if not pcall(require, 'checks') then function package.preload.checks() function checks() end end end
|
||||
|
||||
-- Main file for the metalua executable
|
||||
require 'metalua.loader' -- load *.mlue files
|
||||
require 'metalua.compiler.globals' -- metalua-aware loadstring, dofile etc.
|
||||
|
||||
local alt_getopt = require 'alt_getopt'
|
||||
local pp = require 'metalua.pprint'
|
||||
local mlc = require 'metalua.compiler'
|
||||
|
||||
local M = { }
|
||||
|
||||
local AST_COMPILE_ERROR_NUMBER = -1
|
||||
local RUNTIME_ERROR_NUMBER = -3
|
||||
|
||||
local alt_getopt_options = "f:l:e:o:xivaASbs"
|
||||
|
||||
local long_opts = {
|
||||
file='f',
|
||||
library='l',
|
||||
literal='e',
|
||||
output='o',
|
||||
run='x',
|
||||
interactive='i',
|
||||
verbose='v',
|
||||
['print-ast']='a',
|
||||
['print-ast-lineinfo']='A',
|
||||
['print-src']='S',
|
||||
['meta-bugs']='b',
|
||||
['sharp-bang']='s',
|
||||
}
|
||||
|
||||
local chunk_options = {
|
||||
library=1,
|
||||
file=1,
|
||||
literal=1
|
||||
}
|
||||
|
||||
local usage=[[
|
||||
|
||||
Compile and/or execute metalua programs. Parameters passed to the
|
||||
compiler should be prefixed with an option flag, hinting what must be
|
||||
done with them: take tham as file names to compile, as library names
|
||||
to load, as parameters passed to the running program... When option
|
||||
flags are absent, metalua tries to adopt a "Do What I Mean" approach:
|
||||
|
||||
- if no code (no library, no literal expression and no file) is
|
||||
specified, the first flag-less parameter is taken as a file name to
|
||||
load.
|
||||
|
||||
- if no code and no parameter is passed, an interactive loop is
|
||||
started.
|
||||
|
||||
- if a target file is specified with --output, the program is not
|
||||
executed by default, unless a --run flag forces it to. Conversely,
|
||||
if no --output target is specified, the code is run unless ++run
|
||||
forbids it.
|
||||
]]
|
||||
|
||||
function M.cmdline_parser(...)
|
||||
local argv = {...}
|
||||
local opts, optind, optarg =
|
||||
alt_getopt.get_ordered_opts({...}, alt_getopt_options, long_opts)
|
||||
--pp.printf("argv=%s; opts=%s, ending at %i, with optarg=%s",
|
||||
-- argv, opts, optind, optarg)
|
||||
local s2l = { } -- short to long option names conversion table
|
||||
for long, short in pairs(long_opts) do s2l[short]=long end
|
||||
local cfg = { chunks = { } }
|
||||
for i, short in pairs(opts) do
|
||||
local long = s2l[short]
|
||||
if chunk_options[long] then table.insert(cfg.chunks, { tag=long, optarg[i] })
|
||||
else cfg[long] = optarg[i] or true end
|
||||
end
|
||||
cfg.params = { select(optind, ...) }
|
||||
return cfg
|
||||
end
|
||||
|
||||
function M.main (...)
|
||||
|
||||
local cfg = M.cmdline_parser(...)
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Print messages if in verbose mode
|
||||
-------------------------------------------------------------------
|
||||
local function verb_print (fmt, ...)
|
||||
if cfg.verbose then
|
||||
return pp.printf ("[ "..fmt.." ]", ...)
|
||||
end
|
||||
end
|
||||
|
||||
if cfg.verbose then
|
||||
verb_print("raw options: %s", cfg)
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- If there's no chunk but there are params, interpret the first
|
||||
-- param as a file name.
|
||||
if not next(cfg.chunks) and next(cfg.params) then
|
||||
local the_file = table.remove(cfg.params, 1)
|
||||
verb_print("Param %q considered as a source file", the_file)
|
||||
cfg.file={ the_file }
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- If nothing to do, run REPL loop
|
||||
if not next(cfg.chunks) and not cfg.interactive then
|
||||
verb_print "Nothing to compile nor run, force interactive loop"
|
||||
cfg.interactive=true
|
||||
end
|
||||
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Run if asked to, or if no --output has been given
|
||||
-- if cfg.run==false it's been *forced* to false, don't override.
|
||||
if not cfg.run and not cfg.output then
|
||||
verb_print("No output file specified; I'll run the program")
|
||||
cfg.run = true
|
||||
end
|
||||
|
||||
local code = { }
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Get ASTs from sources
|
||||
|
||||
local last_file_idx
|
||||
for i, x in ipairs(cfg.chunks) do
|
||||
local compiler = mlc.new()
|
||||
local tag, val = x.tag, x[1]
|
||||
verb_print("Compiling %s", x)
|
||||
local st, ast
|
||||
if tag=='library' then
|
||||
ast = { tag='Call',
|
||||
{tag='Id', "require" },
|
||||
{tag='String', val } }
|
||||
elseif tag=='literal' then ast = compiler :src_to_ast(val)
|
||||
elseif tag=='file' then
|
||||
ast = compiler :srcfile_to_ast(val)
|
||||
-- Isolate each file in a separate fenv
|
||||
ast = { tag='Call',
|
||||
{ tag='Function', { { tag='Dots'} }, ast },
|
||||
{ tag='Dots' } }
|
||||
ast.source = '@'..val
|
||||
code.source = '@'..val
|
||||
last_file_idx = i
|
||||
else
|
||||
error ("Bad option "..tag)
|
||||
end
|
||||
local valid = true -- TODO: check AST's correctness
|
||||
if not valid then
|
||||
pp.printf ("Cannot compile %s:\n%s", x, ast or "no msg")
|
||||
os.exit (AST_COMPILE_ERROR_NUMBER)
|
||||
end
|
||||
ast.origin = x
|
||||
table.insert(code, ast)
|
||||
end
|
||||
-- The last file returns the whole chunk's result
|
||||
if last_file_idx then
|
||||
-- transform +{ (function(...) -{ast} end)(...) }
|
||||
-- into +{ return (function(...) -{ast} end)(...) }
|
||||
local prv_ast = code[last_file_idx]
|
||||
local new_ast = { tag='Return', prv_ast }
|
||||
new_ast.source, new_ast.origin, prv_ast.source, prv_ast.origin =
|
||||
prv_ast.source, prv_ast.origin, nil, nil
|
||||
code[last_file_idx] = new_ast
|
||||
end
|
||||
|
||||
-- Further uses of compiler won't involve AST transformations:
|
||||
-- they can share the same instance.
|
||||
-- TODO: reuse last instance if possible.
|
||||
local compiler = mlc.new()
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- AST printing
|
||||
if cfg['print-ast'] or cfg['print-ast-lineinfo'] then
|
||||
verb_print "Resulting AST:"
|
||||
for _, x in ipairs(code) do
|
||||
pp.printf("--- AST From %s: ---", x.source)
|
||||
if x.origin and x.origin.tag=='File' then x=x[1][1][2][1] end
|
||||
local pp_cfg = cfg['print-ast-lineinfo']
|
||||
and { line_max=1, fix_indent=1, metalua_tag=1 }
|
||||
or { line_max=1, metalua_tag=1, hide_hash=1 }
|
||||
pp.print(x, pp_cfg)
|
||||
end
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Source printing
|
||||
if cfg['print-src'] then
|
||||
verb_print "Resulting sources:"
|
||||
for _, x in ipairs(code) do
|
||||
printf("--- Source From %s: ---", table.tostring(x.source, 'nohash'))
|
||||
if x.origin and x.origin.tag=='File' then x=x[1][1][2] end
|
||||
print (compiler :ast2string (x))
|
||||
end
|
||||
end
|
||||
|
||||
-- TODO: canonize/check AST
|
||||
|
||||
local bytecode = compiler :ast_to_bytecode (code)
|
||||
code = nil
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Insert #!... command
|
||||
if cfg.sharpbang then
|
||||
local shbang = cfg.sharpbang
|
||||
verb_print ("Adding sharp-bang directive %q", shbang)
|
||||
if not shbang :match'^#!' then shbang = '#!' .. shbang end
|
||||
if not shbang :match'\n$' then shbang = shbang .. '\n' end
|
||||
bytecode = shbang .. bytecode
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Save to file
|
||||
if cfg.output then
|
||||
-- FIXME: handle '-'
|
||||
verb_print ("Saving to file %q", cfg.output)
|
||||
local file, err_msg = io.open(cfg.output, 'wb')
|
||||
if not file then error("can't open output file: "..err_msg) end
|
||||
file:write(bytecode)
|
||||
file:close()
|
||||
if cfg.sharpbang and os.getenv "OS" ~= "Windows_NT" then
|
||||
pcall(os.execute, 'chmod a+x "'..cfg.output..'"')
|
||||
end
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Run compiled code
|
||||
if cfg.run then
|
||||
verb_print "Running"
|
||||
local f = compiler :bytecode_to_function (bytecode)
|
||||
bytecode = nil
|
||||
-- FIXME: isolate execution in a ring
|
||||
-- FIXME: check for failures
|
||||
local function print_traceback (errmsg)
|
||||
return errmsg .. '\n' .. debug.traceback ('',2) .. '\n'
|
||||
end
|
||||
local function g() return f(unpack (cfg.params)) end
|
||||
local st, msg = xpcall(g, print_traceback)
|
||||
if not st then
|
||||
io.stderr:write(msg)
|
||||
os.exit(RUNTIME_ERROR_NUMBER)
|
||||
end
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Run REPL loop
|
||||
if cfg.interactive then
|
||||
verb_print "Starting REPL loop"
|
||||
require 'metalua.repl' .run()
|
||||
end
|
||||
|
||||
verb_print "Done"
|
||||
|
||||
end
|
||||
|
||||
return M.main(...)
|
|
@ -1,29 +0,0 @@
|
|||
--------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local compile = require 'metalua.compiler.bytecode.compile'
|
||||
local ldump = require 'metalua.compiler.bytecode.ldump'
|
||||
|
||||
local M = { }
|
||||
|
||||
M.ast_to_proto = compile.ast_to_proto
|
||||
M.proto_to_bytecode = ldump.dump_string
|
||||
M.proto_to_file = ldump.dump_file
|
||||
|
||||
return M
|
|
@ -1,181 +0,0 @@
|
|||
---------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
--
|
||||
-- Convert between various code representation formats. Atomic
|
||||
-- converters are written in extenso, others are composed automatically
|
||||
-- by chaining the atomic ones together in a closure.
|
||||
--
|
||||
-- Supported formats are:
|
||||
--
|
||||
-- * srcfile: the name of a file containing sources.
|
||||
-- * src: these sources as a single string.
|
||||
-- * lexstream: a stream of lexemes.
|
||||
-- * ast: an abstract syntax tree.
|
||||
-- * proto: a (Yueliang) struture containing a high level
|
||||
-- representation of bytecode. Largely based on the
|
||||
-- Proto structure in Lua's VM
|
||||
-- * bytecode: a string dump of the function, as taken by
|
||||
-- loadstring() and produced by string.dump().
|
||||
-- * function: an executable lua function in RAM.
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
require 'checks'
|
||||
|
||||
local M = { }
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Order of the transformations. if 'a' is on the left of 'b', then a 'a' can
|
||||
-- be transformed into a 'b' (but not the other way around).
|
||||
-- M.sequence goes for numbers to format names, M.order goes from format
|
||||
-- names to numbers.
|
||||
--------------------------------------------------------------------------------
|
||||
M.sequence = {
|
||||
'srcfile', 'src', 'lexstream', 'ast', 'proto', 'bytecode', 'function' }
|
||||
|
||||
local arg_types = {
|
||||
srcfile = { 'string', '?string' },
|
||||
src = { 'string', '?string' },
|
||||
lexstream = { 'lexer.stream', '?string' },
|
||||
ast = { 'table', '?string' },
|
||||
proto = { 'table', '?string' },
|
||||
bytecode = { 'string', '?string' },
|
||||
}
|
||||
|
||||
if false then
|
||||
-- if defined, runs on every newly-generated AST
|
||||
function M.check_ast(ast)
|
||||
local function rec(x, n, parent)
|
||||
if not x.lineinfo and parent.lineinfo then
|
||||
local pp = require 'metalua.pprint'
|
||||
pp.printf("WARNING: Missing lineinfo in child #%s `%s{...} of node at %s",
|
||||
n, x.tag or '', tostring(parent.lineinfo))
|
||||
end
|
||||
for i, child in ipairs(x) do
|
||||
if type(child)=='table' then rec(child, i, x) end
|
||||
end
|
||||
end
|
||||
rec(ast, -1, { })
|
||||
end
|
||||
end
|
||||
|
||||
|
||||
M.order= { }; for a,b in pairs(M.sequence) do M.order[b]=a end
|
||||
|
||||
local CONV = { } -- conversion metatable __index
|
||||
|
||||
function CONV :srcfile_to_src(x, name)
|
||||
checks('metalua.compiler', 'string', '?string')
|
||||
name = name or '@'..x
|
||||
local f, msg = io.open (x, 'rb')
|
||||
if not f then error(msg) end
|
||||
local r, msg = f :read '*a'
|
||||
if not r then error("Cannot read file '"..x.."': "..msg) end
|
||||
f :close()
|
||||
return r, name
|
||||
end
|
||||
|
||||
function CONV :src_to_lexstream(src, name)
|
||||
checks('metalua.compiler', 'string', '?string')
|
||||
local r = self.parser.lexer :newstream (src, name)
|
||||
return r, name
|
||||
end
|
||||
|
||||
function CONV :lexstream_to_ast(lx, name)
|
||||
checks('metalua.compiler', 'lexer.stream', '?string')
|
||||
local r = self.parser.chunk(lx)
|
||||
r.source = name
|
||||
if M.check_ast then M.check_ast (r) end
|
||||
return r, name
|
||||
end
|
||||
|
||||
local bytecode_compiler = nil -- cache to avoid repeated `pcall(require(...))`
|
||||
local function get_bytecode_compiler()
|
||||
if bytecode_compiler then return bytecode_compiler else
|
||||
local status, result = pcall(require, 'metalua.compiler.bytecode')
|
||||
if status then
|
||||
bytecode_compiler = result
|
||||
return result
|
||||
elseif string.match(result, "not found") then
|
||||
error "Compilation only available with full Metalua"
|
||||
else error (result) end
|
||||
end
|
||||
end
|
||||
|
||||
function CONV :ast_to_proto(ast, name)
|
||||
checks('metalua.compiler', 'table', '?string')
|
||||
return get_bytecode_compiler().ast_to_proto(ast, name), name
|
||||
end
|
||||
|
||||
function CONV :proto_to_bytecode(proto, name)
|
||||
return get_bytecode_compiler().proto_to_bytecode(proto), name
|
||||
end
|
||||
|
||||
function CONV :bytecode_to_function(bc, name)
|
||||
checks('metalua.compiler', 'string', '?string')
|
||||
return loadstring(bc, name)
|
||||
end
|
||||
|
||||
-- Create all sensible combinations
|
||||
for i=1,#M.sequence do
|
||||
local src = M.sequence[i]
|
||||
for j=i+2, #M.sequence do
|
||||
local dst = M.sequence[j]
|
||||
local dst_name = src.."_to_"..dst
|
||||
local my_arg_types = arg_types[src]
|
||||
local functions = { }
|
||||
for k=i, j-1 do
|
||||
local name = M.sequence[k].."_to_"..M.sequence[k+1]
|
||||
local f = assert(CONV[name], name)
|
||||
table.insert (functions, f)
|
||||
end
|
||||
CONV[dst_name] = function(self, a, b)
|
||||
checks('metalua.compiler', unpack(my_arg_types))
|
||||
for _, f in ipairs(functions) do
|
||||
a, b = f(self, a, b)
|
||||
end
|
||||
return a, b
|
||||
end
|
||||
--printf("Created M.%s out of %s", dst_name, table.concat(n, ', '))
|
||||
end
|
||||
end
|
||||
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- This one goes in the "wrong" direction, cannot be composed.
|
||||
--------------------------------------------------------------------------------
|
||||
function CONV :function_to_bytecode(...) return string.dump(...) end
|
||||
|
||||
function CONV :ast_to_src(...)
|
||||
require 'metalua.loader' -- ast_to_string isn't written in plain lua
|
||||
return require 'metalua.compiler.ast_to_src' (...)
|
||||
end
|
||||
|
||||
local MT = { __index=CONV, __type='metalua.compiler' }
|
||||
|
||||
function M.new()
|
||||
local parser = require 'metalua.compiler.parser' .new()
|
||||
local self = { parser = parser }
|
||||
setmetatable(self, MT)
|
||||
return self
|
||||
end
|
||||
|
||||
return M
|
|
@ -1,693 +0,0 @@
|
|||
-------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
-{ extension ('match', ...) }
|
||||
|
||||
local M = { }
|
||||
M.__index = M
|
||||
|
||||
local pp=require 'metalua.pprint'
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Instanciate a new AST->source synthetizer
|
||||
--------------------------------------------------------------------------------
|
||||
function M.new ()
|
||||
local self = {
|
||||
_acc = { }, -- Accumulates pieces of source as strings
|
||||
current_indent = 0, -- Current level of line indentation
|
||||
indent_step = " " -- Indentation symbol, normally spaces or '\t'
|
||||
}
|
||||
return setmetatable (self, M)
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Run a synthetizer on the `ast' arg and return the source as a string.
|
||||
-- Can also be used as a static method `M.run (ast)'; in this case,
|
||||
-- a temporary Metizer is instanciated on the fly.
|
||||
--------------------------------------------------------------------------------
|
||||
function M:run (ast)
|
||||
if not ast then
|
||||
self, ast = M.new(), self
|
||||
end
|
||||
self._acc = { }
|
||||
self:node (ast)
|
||||
return table.concat (self._acc)
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Accumulate a piece of source file in the synthetizer.
|
||||
--------------------------------------------------------------------------------
|
||||
function M:acc (x)
|
||||
if x then table.insert (self._acc, x) end
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Accumulate an indented newline.
|
||||
-- Jumps an extra line if indentation is 0, so that
|
||||
-- toplevel definitions are separated by an extra empty line.
|
||||
--------------------------------------------------------------------------------
|
||||
function M:nl ()
|
||||
if self.current_indent == 0 then self:acc "\n" end
|
||||
self:acc ("\n" .. self.indent_step:rep (self.current_indent))
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Increase indentation and accumulate a new line.
|
||||
--------------------------------------------------------------------------------
|
||||
function M:nlindent ()
|
||||
self.current_indent = self.current_indent + 1
|
||||
self:nl ()
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Decrease indentation and accumulate a new line.
|
||||
--------------------------------------------------------------------------------
|
||||
function M:nldedent ()
|
||||
self.current_indent = self.current_indent - 1
|
||||
self:acc ("\n" .. self.indent_step:rep (self.current_indent))
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Keywords, which are illegal as identifiers.
|
||||
--------------------------------------------------------------------------------
|
||||
local keywords_list = {
|
||||
"and", "break", "do", "else", "elseif",
|
||||
"end", "false", "for", "function", "if",
|
||||
"in", "local", "nil", "not", "or",
|
||||
"repeat", "return", "then", "true", "until",
|
||||
"while" }
|
||||
local keywords = { }
|
||||
for _, kw in pairs(keywords_list) do keywords[kw]=true end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Return true iff string `id' is a legal identifier name.
|
||||
--------------------------------------------------------------------------------
|
||||
local function is_ident (id)
|
||||
return string['match'](id, "^[%a_][%w_]*$") and not keywords[id]
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Return true iff ast represents a legal function name for
|
||||
-- syntax sugar ``function foo.bar.gnat() ... end'':
|
||||
-- a series of nested string indexes, with an identifier as
|
||||
-- the innermost node.
|
||||
--------------------------------------------------------------------------------
|
||||
local function is_idx_stack (ast)
|
||||
match ast with
|
||||
| `Id{ _ } -> return true
|
||||
| `Index{ left, `String{ _ } } -> return is_idx_stack (left)
|
||||
| _ -> return false
|
||||
end
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Operator precedences, in increasing order.
|
||||
-- This is not directly used, it's used to generate op_prec below.
|
||||
--------------------------------------------------------------------------------
|
||||
local op_preprec = {
|
||||
{ "or", "and" },
|
||||
{ "lt", "le", "eq", "ne" },
|
||||
{ "concat" },
|
||||
{ "add", "sub" },
|
||||
{ "mul", "div", "mod" },
|
||||
{ "unary", "not", "len" },
|
||||
{ "pow" },
|
||||
{ "index" } }
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- operator --> precedence table, generated from op_preprec.
|
||||
--------------------------------------------------------------------------------
|
||||
local op_prec = { }
|
||||
|
||||
for prec, ops in ipairs (op_preprec) do
|
||||
for _, op in ipairs (ops) do
|
||||
op_prec[op] = prec
|
||||
end
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- operator --> source representation.
|
||||
--------------------------------------------------------------------------------
|
||||
local op_symbol = {
|
||||
add = " + ", sub = " - ", mul = " * ",
|
||||
div = " / ", mod = " % ", pow = " ^ ",
|
||||
concat = " .. ", eq = " == ", ne = " ~= ",
|
||||
lt = " < ", le = " <= ", ["and"] = " and ",
|
||||
["or"] = " or ", ["not"] = "not ", len = "# " }
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Accumulate the source representation of AST `node' in
|
||||
-- the synthetizer. Most of the work is done by delegating to
|
||||
-- the method having the name of the AST tag.
|
||||
-- If something can't be converted to normal sources, it's
|
||||
-- instead dumped as a `-{ ... }' splice in the source accumulator.
|
||||
--------------------------------------------------------------------------------
|
||||
function M:node (node)
|
||||
assert (self~=M and self._acc)
|
||||
if node==nil then self:acc'<<error>>'; return end
|
||||
if not node.tag then -- tagless block.
|
||||
self:list (node, self.nl)
|
||||
else
|
||||
local f = M[node.tag]
|
||||
if type (f) == "function" then -- Delegate to tag method.
|
||||
f (self, node, unpack (node))
|
||||
elseif type (f) == "string" then -- tag string.
|
||||
self:acc (f)
|
||||
else -- No appropriate method, fall back to splice dumping.
|
||||
-- This cannot happen in a plain Lua AST.
|
||||
self:acc " -{ "
|
||||
self:acc (pp.tostring (node, {metalua_tag=1, hide_hash=1}), 80)
|
||||
self:acc " }"
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Convert every node in the AST list `list' passed as 1st arg.
|
||||
-- `sep' is an optional separator to be accumulated between each list element,
|
||||
-- it can be a string or a synth method.
|
||||
-- `start' is an optional number (default == 1), indicating which is the
|
||||
-- first element of list to be converted, so that we can skip the begining
|
||||
-- of a list.
|
||||
--------------------------------------------------------------------------------
|
||||
function M:list (list, sep, start)
|
||||
for i = start or 1, # list do
|
||||
self:node (list[i])
|
||||
if list[i + 1] then
|
||||
if not sep then
|
||||
elseif type (sep) == "function" then sep (self)
|
||||
elseif type (sep) == "string" then self:acc (sep)
|
||||
else error "Invalid list separator" end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
--
|
||||
-- Tag methods.
|
||||
-- ------------
|
||||
--
|
||||
-- Specific AST node dumping methods, associated to their node kinds
|
||||
-- by their name, which is the corresponding AST tag.
|
||||
-- synth:node() is in charge of delegating a node's treatment to the
|
||||
-- appropriate tag method.
|
||||
--
|
||||
-- Such tag methods are called with the AST node as 1st arg.
|
||||
-- As a convenience, the n node's children are passed as args #2 ... n+1.
|
||||
--
|
||||
-- There are several things that could be refactored into common subroutines
|
||||
-- here: statement blocks dumping, function dumping...
|
||||
-- However, given their small size and linear execution
|
||||
-- (they basically perform series of :acc(), :node(), :list(),
|
||||
-- :nl(), :nlindent() and :nldedent() calls), it seems more readable
|
||||
-- to avoid multiplication of such tiny functions.
|
||||
--
|
||||
-- To make sense out of these, you need to know metalua's AST syntax, as
|
||||
-- found in the reference manual or in metalua/doc/ast.txt.
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
function M:Do (node)
|
||||
self:acc "do"
|
||||
self:nlindent ()
|
||||
self:list (node, self.nl)
|
||||
self:nldedent ()
|
||||
self:acc "end"
|
||||
end
|
||||
|
||||
function M:Set (node)
|
||||
match node with
|
||||
| `Set{ { `Index{ lhs, `String{ method } } },
|
||||
{ `Function{ { `Id "self", ... } == params, body } } }
|
||||
if is_idx_stack (lhs) and is_ident (method) ->
|
||||
-- ``function foo:bar(...) ... end'' --
|
||||
self:acc "function "
|
||||
self:node (lhs)
|
||||
self:acc ":"
|
||||
self:acc (method)
|
||||
self:acc " ("
|
||||
self:list (params, ", ", 2)
|
||||
self:acc ")"
|
||||
self:nlindent ()
|
||||
self:list (body, self.nl)
|
||||
self:nldedent ()
|
||||
self:acc "end"
|
||||
|
||||
| `Set{ { lhs }, { `Function{ params, body } } } if is_idx_stack (lhs) ->
|
||||
-- ``function foo(...) ... end'' --
|
||||
self:acc "function "
|
||||
self:node (lhs)
|
||||
self:acc " ("
|
||||
self:list (params, ", ")
|
||||
self:acc ")"
|
||||
self:nlindent ()
|
||||
self:list (body, self.nl)
|
||||
self:nldedent ()
|
||||
self:acc "end"
|
||||
|
||||
| `Set{ { `Id{ lhs1name } == lhs1, ... } == lhs, rhs }
|
||||
if not is_ident (lhs1name) ->
|
||||
-- ``foo, ... = ...'' when foo is *not* a valid identifier.
|
||||
-- In that case, the spliced 1st variable must get parentheses,
|
||||
-- to be distinguished from a statement splice.
|
||||
-- This cannot happen in a plain Lua AST.
|
||||
self:acc "("
|
||||
self:node (lhs1)
|
||||
self:acc ")"
|
||||
if lhs[2] then -- more than one lhs variable
|
||||
self:acc ", "
|
||||
self:list (lhs, ", ", 2)
|
||||
end
|
||||
self:acc " = "
|
||||
self:list (rhs, ", ")
|
||||
|
||||
| `Set{ lhs, rhs } ->
|
||||
-- ``... = ...'', no syntax sugar --
|
||||
self:list (lhs, ", ")
|
||||
self:acc " = "
|
||||
self:list (rhs, ", ")
|
||||
| `Set{ lhs, rhs, annot } ->
|
||||
-- ``... = ...'', no syntax sugar, annotation --
|
||||
local n = #lhs
|
||||
for i=1,n do
|
||||
local ell, a = lhs[i], annot[i]
|
||||
self:node (ell)
|
||||
if a then
|
||||
self:acc ' #'
|
||||
self:node(a)
|
||||
end
|
||||
if i~=n then self:acc ', ' end
|
||||
end
|
||||
self:acc " = "
|
||||
self:list (rhs, ", ")
|
||||
end
|
||||
end
|
||||
|
||||
function M:While (node, cond, body)
|
||||
self:acc "while "
|
||||
self:node (cond)
|
||||
self:acc " do"
|
||||
self:nlindent ()
|
||||
self:list (body, self.nl)
|
||||
self:nldedent ()
|
||||
self:acc "end"
|
||||
end
|
||||
|
||||
function M:Repeat (node, body, cond)
|
||||
self:acc "repeat"
|
||||
self:nlindent ()
|
||||
self:list (body, self.nl)
|
||||
self:nldedent ()
|
||||
self:acc "until "
|
||||
self:node (cond)
|
||||
end
|
||||
|
||||
function M:If (node)
|
||||
for i = 1, #node-1, 2 do
|
||||
-- for each ``if/then'' and ``elseif/then'' pair --
|
||||
local cond, body = node[i], node[i+1]
|
||||
self:acc (i==1 and "if " or "elseif ")
|
||||
self:node (cond)
|
||||
self:acc " then"
|
||||
self:nlindent ()
|
||||
self:list (body, self.nl)
|
||||
self:nldedent ()
|
||||
end
|
||||
-- odd number of children --> last one is an `else' clause --
|
||||
if #node%2 == 1 then
|
||||
self:acc "else"
|
||||
self:nlindent ()
|
||||
self:list (node[#node], self.nl)
|
||||
self:nldedent ()
|
||||
end
|
||||
self:acc "end"
|
||||
end
|
||||
|
||||
function M:Fornum (node, var, first, last)
|
||||
local body = node[#node]
|
||||
self:acc "for "
|
||||
self:node (var)
|
||||
self:acc " = "
|
||||
self:node (first)
|
||||
self:acc ", "
|
||||
self:node (last)
|
||||
if #node==5 then -- 5 children --> child #4 is a step increment.
|
||||
self:acc ", "
|
||||
self:node (node[4])
|
||||
end
|
||||
self:acc " do"
|
||||
self:nlindent ()
|
||||
self:list (body, self.nl)
|
||||
self:nldedent ()
|
||||
self:acc "end"
|
||||
end
|
||||
|
||||
function M:Forin (node, vars, generators, body)
|
||||
self:acc "for "
|
||||
self:list (vars, ", ")
|
||||
self:acc " in "
|
||||
self:list (generators, ", ")
|
||||
self:acc " do"
|
||||
self:nlindent ()
|
||||
self:list (body, self.nl)
|
||||
self:nldedent ()
|
||||
self:acc "end"
|
||||
end
|
||||
|
||||
function M:Local (node, lhs, rhs, annots)
|
||||
if next (lhs) then
|
||||
self:acc "local "
|
||||
if annots then
|
||||
local n = #lhs
|
||||
for i=1, n do
|
||||
self:node (lhs)
|
||||
local a = annots[i]
|
||||
if a then
|
||||
self:acc ' #'
|
||||
self:node (a)
|
||||
end
|
||||
if i~=n then self:acc ', ' end
|
||||
end
|
||||
else
|
||||
self:list (lhs, ", ")
|
||||
end
|
||||
if rhs[1] then
|
||||
self:acc " = "
|
||||
self:list (rhs, ", ")
|
||||
end
|
||||
else -- Can't create a local statement with 0 variables in plain Lua
|
||||
self:acc (table.tostring (node, 'nohash', 80))
|
||||
end
|
||||
end
|
||||
|
||||
function M:Localrec (node, lhs, rhs)
|
||||
match node with
|
||||
| `Localrec{ { `Id{name} }, { `Function{ params, body } } }
|
||||
if is_ident (name) ->
|
||||
-- ``local function name() ... end'' --
|
||||
self:acc "local function "
|
||||
self:acc (name)
|
||||
self:acc " ("
|
||||
self:list (params, ", ")
|
||||
self:acc ")"
|
||||
self:nlindent ()
|
||||
self:list (body, self.nl)
|
||||
self:nldedent ()
|
||||
self:acc "end"
|
||||
|
||||
| _ ->
|
||||
-- Other localrec are unprintable ==> splice them --
|
||||
-- This cannot happen in a plain Lua AST. --
|
||||
self:acc "-{ "
|
||||
self:acc (table.tostring (node, 'nohash', 80))
|
||||
self:acc " }"
|
||||
end
|
||||
end
|
||||
|
||||
function M:Call (node, f)
|
||||
-- single string or table literal arg ==> no need for parentheses. --
|
||||
local parens
|
||||
match node with
|
||||
| `Call{ _, `String{_} }
|
||||
| `Call{ _, `Table{...}} -> parens = false
|
||||
| _ -> parens = true
|
||||
end
|
||||
self:node (f)
|
||||
self:acc (parens and " (" or " ")
|
||||
self:list (node, ", ", 2) -- skip `f'.
|
||||
self:acc (parens and ")")
|
||||
end
|
||||
|
||||
function M:Invoke (node, f, method)
|
||||
-- single string or table literal arg ==> no need for parentheses. --
|
||||
local parens
|
||||
match node with
|
||||
| `Invoke{ _, _, `String{_} }
|
||||
| `Invoke{ _, _, `Table{...}} -> parens = false
|
||||
| _ -> parens = true
|
||||
end
|
||||
self:node (f)
|
||||
self:acc ":"
|
||||
self:acc (method[1])
|
||||
self:acc (parens and " (" or " ")
|
||||
self:list (node, ", ", 3) -- Skip args #1 and #2, object and method name.
|
||||
self:acc (parens and ")")
|
||||
end
|
||||
|
||||
function M:Return (node)
|
||||
self:acc "return "
|
||||
self:list (node, ", ")
|
||||
end
|
||||
|
||||
M.Break = "break"
|
||||
M.Nil = "nil"
|
||||
M.False = "false"
|
||||
M.True = "true"
|
||||
M.Dots = "..."
|
||||
|
||||
function M:Number (node, n)
|
||||
self:acc (tostring (n))
|
||||
end
|
||||
|
||||
function M:String (node, str)
|
||||
-- format "%q" prints '\n' in an umpractical way IMO,
|
||||
-- so this is fixed with the :gsub( ) call.
|
||||
self:acc (string.format ("%q", str):gsub ("\\\n", "\\n"))
|
||||
end
|
||||
|
||||
function M:Function (node, params, body, annots)
|
||||
self:acc "function ("
|
||||
if annots then
|
||||
local n = #params
|
||||
for i=1,n do
|
||||
local p, a = params[i], annots[i]
|
||||
self:node(p)
|
||||
if annots then
|
||||
self:acc " #"
|
||||
self:node(a)
|
||||
end
|
||||
if i~=n then self:acc ', ' end
|
||||
end
|
||||
else
|
||||
self:list (params, ", ")
|
||||
end
|
||||
self:acc ")"
|
||||
self:nlindent ()
|
||||
self:list (body, self.nl)
|
||||
self:nldedent ()
|
||||
self:acc "end"
|
||||
end
|
||||
|
||||
function M:Table (node)
|
||||
if not node[1] then self:acc "{ }" else
|
||||
self:acc "{"
|
||||
if #node > 1 then self:nlindent () else self:acc " " end
|
||||
for i, elem in ipairs (node) do
|
||||
match elem with
|
||||
| `Pair{ `String{ key }, value } if is_ident (key) ->
|
||||
-- ``key = value''. --
|
||||
self:acc (key)
|
||||
self:acc " = "
|
||||
self:node (value)
|
||||
|
||||
| `Pair{ key, value } ->
|
||||
-- ``[key] = value''. --
|
||||
self:acc "["
|
||||
self:node (key)
|
||||
self:acc "] = "
|
||||
self:node (value)
|
||||
|
||||
| _ ->
|
||||
-- ``value''. --
|
||||
self:node (elem)
|
||||
end
|
||||
if node [i+1] then
|
||||
self:acc ","
|
||||
self:nl ()
|
||||
end
|
||||
end
|
||||
if #node > 1 then self:nldedent () else self:acc " " end
|
||||
self:acc "}"
|
||||
end
|
||||
end
|
||||
|
||||
function M:Op (node, op, a, b)
|
||||
-- Transform ``not (a == b)'' into ``a ~= b''. --
|
||||
match node with
|
||||
| `Op{ "not", `Op{ "eq", _a, _b } }
|
||||
| `Op{ "not", `Paren{ `Op{ "eq", _a, _b } } } ->
|
||||
op, a, b = "ne", _a, _b
|
||||
| _ ->
|
||||
end
|
||||
|
||||
if b then -- binary operator.
|
||||
local left_paren, right_paren
|
||||
match a with
|
||||
| `Op{ op_a, ...} if op_prec[op] >= op_prec[op_a] -> left_paren = true
|
||||
| _ -> left_paren = false
|
||||
end
|
||||
|
||||
match b with -- FIXME: might not work with right assoc operators ^ and ..
|
||||
| `Op{ op_b, ...} if op_prec[op] >= op_prec[op_b] -> right_paren = true
|
||||
| _ -> right_paren = false
|
||||
end
|
||||
|
||||
self:acc (left_paren and "(")
|
||||
self:node (a)
|
||||
self:acc (left_paren and ")")
|
||||
|
||||
self:acc (op_symbol [op])
|
||||
|
||||
self:acc (right_paren and "(")
|
||||
self:node (b)
|
||||
self:acc (right_paren and ")")
|
||||
|
||||
else -- unary operator.
|
||||
local paren
|
||||
match a with
|
||||
| `Op{ op_a, ... } if op_prec[op] >= op_prec[op_a] -> paren = true
|
||||
| _ -> paren = false
|
||||
end
|
||||
self:acc (op_symbol[op])
|
||||
self:acc (paren and "(")
|
||||
self:node (a)
|
||||
self:acc (paren and ")")
|
||||
end
|
||||
end
|
||||
|
||||
function M:Paren (node, content)
|
||||
self:acc "("
|
||||
self:node (content)
|
||||
self:acc ")"
|
||||
end
|
||||
|
||||
function M:Index (node, table, key)
|
||||
local paren_table
|
||||
-- Check precedence, see if parens are needed around the table --
|
||||
match table with
|
||||
| `Op{ op, ... } if op_prec[op] < op_prec.index -> paren_table = true
|
||||
| _ -> paren_table = false
|
||||
end
|
||||
|
||||
self:acc (paren_table and "(")
|
||||
self:node (table)
|
||||
self:acc (paren_table and ")")
|
||||
|
||||
match key with
|
||||
| `String{ field } if is_ident (field) ->
|
||||
-- ``table.key''. --
|
||||
self:acc "."
|
||||
self:acc (field)
|
||||
| _ ->
|
||||
-- ``table [key]''. --
|
||||
self:acc "["
|
||||
self:node (key)
|
||||
self:acc "]"
|
||||
end
|
||||
end
|
||||
|
||||
function M:Id (node, name)
|
||||
if is_ident (name) then
|
||||
self:acc (name)
|
||||
else -- Unprintable identifier, fall back to splice representation.
|
||||
-- This cannot happen in a plain Lua AST.
|
||||
self:acc "-{`Id "
|
||||
self:String (node, name)
|
||||
self:acc "}"
|
||||
end
|
||||
end
|
||||
|
||||
|
||||
M.TDyn = '*'
|
||||
M.TDynbar = '**'
|
||||
M.TPass = 'pass'
|
||||
M.TField = 'field'
|
||||
M.TIdbar = M.TId
|
||||
M.TReturn = M.Return
|
||||
|
||||
|
||||
function M:TId (node, name) self:acc(name) end
|
||||
|
||||
|
||||
function M:TCatbar(node, te, tebar)
|
||||
self:acc'('
|
||||
self:node(te)
|
||||
self:acc'|'
|
||||
self:tebar(tebar)
|
||||
self:acc')'
|
||||
end
|
||||
|
||||
function M:TFunction(node, p, r)
|
||||
self:tebar(p)
|
||||
self:acc '->'
|
||||
self:tebar(r)
|
||||
end
|
||||
|
||||
function M:TTable (node, default, pairs)
|
||||
self:acc '['
|
||||
self:list (pairs, ', ')
|
||||
if default.tag~='TField' then
|
||||
self:acc '|'
|
||||
self:node (default)
|
||||
end
|
||||
self:acc ']'
|
||||
end
|
||||
|
||||
function M:TPair (node, k, v)
|
||||
self:node (k)
|
||||
self:acc '='
|
||||
self:node (v)
|
||||
end
|
||||
|
||||
function M:TIdbar (node, name)
|
||||
self :acc (name)
|
||||
end
|
||||
|
||||
function M:TCatbar (node, a, b)
|
||||
self:node(a)
|
||||
self:acc ' ++ '
|
||||
self:node(b)
|
||||
end
|
||||
|
||||
function M:tebar(node)
|
||||
if node.tag then self:node(node) else
|
||||
self:acc '('
|
||||
self:list(node, ', ')
|
||||
self:acc ')'
|
||||
end
|
||||
end
|
||||
|
||||
function M:TUnkbar(node, name)
|
||||
self:acc '~~'
|
||||
self:acc (name)
|
||||
end
|
||||
|
||||
function M:TUnk(node, name)
|
||||
self:acc '~'
|
||||
self:acc (name)
|
||||
end
|
||||
|
||||
for name, tag in pairs{ const='TConst', var='TVar', currently='TCurrently', just='TJust' } do
|
||||
M[tag] = function(self, node, te)
|
||||
self:acc (name..' ')
|
||||
self:node(te)
|
||||
end
|
||||
end
|
||||
|
||||
return (|x| M.run(x))
|
|
@ -1,29 +0,0 @@
|
|||
--------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local compile = require 'metalua.compiler.bytecode.compile'
|
||||
local ldump = require 'metalua.compiler.bytecode.ldump'
|
||||
|
||||
local M = { }
|
||||
|
||||
M.ast_to_proto = compile.ast_to_proto
|
||||
M.proto_to_bytecode = ldump.dump_string
|
||||
M.proto_to_file = ldump.dump_file
|
||||
|
||||
return M
|
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
|
@ -1,448 +0,0 @@
|
|||
-------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2005-2013 Kein-Hong Man, Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Kein-Hong Man - Initial implementation for Lua 5.0, part of Yueliang
|
||||
-- Fabien Fleutot - Port to Lua 5.1, integration with Metalua
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
--[[--------------------------------------------------------------------
|
||||
|
||||
ldump.lua
|
||||
Save bytecodes in Lua
|
||||
This file is part of Yueliang.
|
||||
|
||||
Copyright (c) 2005 Kein-Hong Man <khman@users.sf.net>
|
||||
The COPYRIGHT file describes the conditions
|
||||
under which this software may be distributed.
|
||||
|
||||
------------------------------------------------------------------------
|
||||
|
||||
[FF] Slightly modified, mainly to produce Lua 5.1 bytecode.
|
||||
|
||||
----------------------------------------------------------------------]]
|
||||
|
||||
--[[--------------------------------------------------------------------
|
||||
-- Notes:
|
||||
-- * LUA_NUMBER (double), byte order (little endian) and some other
|
||||
-- header values hard-coded; see other notes below...
|
||||
-- * One significant difference is that instructions are still in table
|
||||
-- form (with OP/A/B/C/Bx fields) and luaP:Instruction() is needed to
|
||||
-- convert them into 4-char strings
|
||||
-- * Deleted:
|
||||
-- luaU:DumpVector: folded into DumpLines, DumpCode
|
||||
-- * Added:
|
||||
-- luaU:endianness() (from lundump.c)
|
||||
-- luaU:make_setS: create a chunk writer that writes to a string
|
||||
-- luaU:make_setF: create a chunk writer that writes to a file
|
||||
-- (lua.h contains a typedef for a Chunkwriter pointer, and
|
||||
-- a Lua-based implementation exists, writer() in lstrlib.c)
|
||||
-- luaU:from_double(x): encode double value for writing
|
||||
-- luaU:from_int(x): encode integer value for writing
|
||||
-- (error checking is limited for these conversion functions)
|
||||
-- (double conversion does not support denormals or NaNs)
|
||||
-- luaU:ttype(o) (from lobject.h)
|
||||
----------------------------------------------------------------------]]
|
||||
|
||||
local luaP = require 'metalua.compiler.bytecode.lopcodes'
|
||||
|
||||
local M = { }
|
||||
|
||||
local format = { }
|
||||
format.header = string.dump(function()end):sub(1, 12)
|
||||
format.little_endian, format.int_size,
|
||||
format.size_t_size, format.instr_size,
|
||||
format.number_size, format.integral = format.header:byte(7, 12)
|
||||
format.little_endian = format.little_endian~=0
|
||||
format.integral = format.integral ~=0
|
||||
|
||||
assert(format.integral or format.number_size==8, "Number format not supported by dumper")
|
||||
assert(format.little_endian, "Big endian architectures not supported by dumper")
|
||||
|
||||
--requires luaP
|
||||
local luaU = { }
|
||||
M.luaU = luaU
|
||||
|
||||
luaU.format = format
|
||||
|
||||
-- constants used by dumper
|
||||
luaU.LUA_TNIL = 0
|
||||
luaU.LUA_TBOOLEAN = 1
|
||||
luaU.LUA_TNUMBER = 3 -- (all in lua.h)
|
||||
luaU.LUA_TSTRING = 4
|
||||
luaU.LUA_TNONE = -1
|
||||
|
||||
-- definitions for headers of binary files
|
||||
--luaU.LUA_SIGNATURE = "\27Lua" -- binary files start with "<esc>Lua"
|
||||
--luaU.VERSION = 81 -- 0x50; last format change was in 5.0
|
||||
--luaU.FORMAT_VERSION = 0 -- 0 is official version. yeah I know I'm a liar.
|
||||
|
||||
-- a multiple of PI for testing native format
|
||||
-- multiplying by 1E7 gives non-trivial integer values
|
||||
--luaU.TEST_NUMBER = 3.14159265358979323846E7
|
||||
|
||||
--[[--------------------------------------------------------------------
|
||||
-- Additional functions to handle chunk writing
|
||||
-- * to use make_setS and make_setF, see test_ldump.lua elsewhere
|
||||
----------------------------------------------------------------------]]
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- works like the lobject.h version except that TObject used in these
|
||||
-- scripts only has a 'value' field, no 'tt' field (native types used)
|
||||
------------------------------------------------------------------------
|
||||
function luaU:ttype(o)
|
||||
local tt = type(o.value)
|
||||
if tt == "number" then return self.LUA_TNUMBER
|
||||
elseif tt == "string" then return self.LUA_TSTRING
|
||||
elseif tt == "nil" then return self.LUA_TNIL
|
||||
elseif tt == "boolean" then return self.LUA_TBOOLEAN
|
||||
else
|
||||
return self.LUA_TNONE -- the rest should not appear
|
||||
end
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- create a chunk writer that writes to a string
|
||||
-- * returns the writer function and a table containing the string
|
||||
-- * to get the final result, look in buff.data
|
||||
------------------------------------------------------------------------
|
||||
function luaU:make_setS()
|
||||
local buff = {}
|
||||
buff.data = ""
|
||||
local writer =
|
||||
function(s, buff) -- chunk writer
|
||||
if not s then return end
|
||||
buff.data = buff.data..s
|
||||
end
|
||||
return writer, buff
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- create a chunk writer that writes to a file
|
||||
-- * returns the writer function and a table containing the file handle
|
||||
-- * if a nil is passed, then writer should close the open file
|
||||
------------------------------------------------------------------------
|
||||
function luaU:make_setF(filename)
|
||||
local buff = {}
|
||||
buff.h = io.open(filename, "wb")
|
||||
if not buff.h then return nil end
|
||||
local writer =
|
||||
function(s, buff) -- chunk writer
|
||||
if not buff.h then return end
|
||||
if not s then buff.h:close(); return end
|
||||
buff.h:write(s)
|
||||
end
|
||||
return writer, buff
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------
|
||||
-- converts a IEEE754 double number to an 8-byte little-endian string
|
||||
-- * luaU:from_double() and luaU:from_int() are from ChunkBake project
|
||||
-- * supports +/- Infinity, but not denormals or NaNs
|
||||
-----------------------------------------------------------------------
|
||||
function luaU:from_double(x)
|
||||
local function grab_byte(v)
|
||||
return math.floor(v / 256),
|
||||
string.char(math.mod(math.floor(v), 256))
|
||||
end
|
||||
local sign = 0
|
||||
if x < 0 then sign = 1; x = -x end
|
||||
local mantissa, exponent = math.frexp(x)
|
||||
if x == 0 then -- zero
|
||||
mantissa, exponent = 0, 0
|
||||
elseif x == 1/0 then
|
||||
mantissa, exponent = 0, 2047
|
||||
else
|
||||
mantissa = (mantissa * 2 - 1) * math.ldexp(0.5, 53)
|
||||
exponent = exponent + 1022
|
||||
end
|
||||
local v, byte = "" -- convert to bytes
|
||||
x = mantissa
|
||||
for i = 1,6 do
|
||||
x, byte = grab_byte(x); v = v..byte -- 47:0
|
||||
end
|
||||
x, byte = grab_byte(exponent * 16 + x); v = v..byte -- 55:48
|
||||
x, byte = grab_byte(sign * 128 + x); v = v..byte -- 63:56
|
||||
return v
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------
|
||||
-- converts a number to a little-endian 32-bit integer string
|
||||
-- * input value assumed to not overflow, can be signed/unsigned
|
||||
-----------------------------------------------------------------------
|
||||
function luaU:from_int(x, size)
|
||||
local v = ""
|
||||
x = math.floor(x)
|
||||
if x >= 0 then
|
||||
for i = 1, size do
|
||||
v = v..string.char(math.mod(x, 256)); x = math.floor(x / 256)
|
||||
end
|
||||
else -- x < 0
|
||||
x = -x
|
||||
local carry = 1
|
||||
for i = 1, size do
|
||||
local c = 255 - math.mod(x, 256) + carry
|
||||
if c == 256 then c = 0; carry = 1 else carry = 0 end
|
||||
v = v..string.char(c); x = math.floor(x / 256)
|
||||
end
|
||||
end
|
||||
return v
|
||||
end
|
||||
|
||||
--[[--------------------------------------------------------------------
|
||||
-- Functions to make a binary chunk
|
||||
-- * many functions have the size parameter removed, since output is
|
||||
-- in the form of a string and some sizes are implicit or hard-coded
|
||||
-- * luaU:DumpVector has been deleted (used in DumpCode & DumpLines)
|
||||
----------------------------------------------------------------------]]
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dump a block of literal bytes
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpLiteral(s, D) self:DumpBlock(s, D) end
|
||||
|
||||
--[[--------------------------------------------------------------------
|
||||
-- struct DumpState:
|
||||
-- L -- lua_State (not used in this script)
|
||||
-- write -- lua_Chunkwriter (chunk writer function)
|
||||
-- data -- void* (chunk writer context or data already written)
|
||||
----------------------------------------------------------------------]]
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dumps a block of bytes
|
||||
-- * lua_unlock(D.L), lua_lock(D.L) deleted
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpBlock(b, D) D.write(b, D.data) end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dumps a single byte
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpByte(y, D)
|
||||
self:DumpBlock(string.char(y), D)
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dumps a signed integer of size `format.int_size` (for int)
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpInt(x, D)
|
||||
self:DumpBlock(self:from_int(x, format.int_size), D)
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dumps an unsigned integer of size `format.size_t_size` (for size_t)
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpSize(x, D)
|
||||
self:DumpBlock(self:from_int(x, format.size_t_size), D)
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dumps a LUA_NUMBER; can be an int or double depending on the VM.
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpNumber(x, D)
|
||||
if format.integral then
|
||||
self:DumpBlock(self:from_int(x, format.number_size), D)
|
||||
else
|
||||
self:DumpBlock(self:from_double(x), D)
|
||||
end
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dumps a Lua string
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpString(s, D)
|
||||
if s == nil then
|
||||
self:DumpSize(0, D)
|
||||
else
|
||||
s = s.."\0" -- include trailing '\0'
|
||||
self:DumpSize(string.len(s), D)
|
||||
self:DumpBlock(s, D)
|
||||
end
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dumps instruction block from function prototype
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpCode(f, D)
|
||||
local n = f.sizecode
|
||||
self:DumpInt(n, D)
|
||||
--was DumpVector
|
||||
for i = 0, n - 1 do
|
||||
self:DumpBlock(luaP:Instruction(f.code[i]), D)
|
||||
end
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dumps local variable names from function prototype
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpLocals(f, D)
|
||||
local n = f.sizelocvars
|
||||
self:DumpInt(n, D)
|
||||
for i = 0, n - 1 do
|
||||
-- Dirty temporary fix:
|
||||
-- `Stat{ } keeps properly count of the number of local vars,
|
||||
-- but fails to keep score of their debug info (names).
|
||||
-- It therefore might happen that #f.localvars < f.sizelocvars, or
|
||||
-- that a variable's startpc and endpc fields are left unset.
|
||||
-- FIXME: This might not be needed anymore, check the bug report
|
||||
-- by J. Belmonte.
|
||||
local var = f.locvars[i]
|
||||
if not var then break end
|
||||
-- printf("[DUMPLOCALS] dumping local var #%i = %s", i, table.tostring(var))
|
||||
self:DumpString(var.varname, D)
|
||||
self:DumpInt(var.startpc or 0, D)
|
||||
self:DumpInt(var.endpc or 0, D)
|
||||
end
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dumps line information from function prototype
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpLines(f, D)
|
||||
local n = f.sizelineinfo
|
||||
self:DumpInt(n, D)
|
||||
--was DumpVector
|
||||
for i = 0, n - 1 do
|
||||
self:DumpInt(f.lineinfo[i], D) -- was DumpBlock
|
||||
--print(i, f.lineinfo[i])
|
||||
end
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dump upvalue names from function prototype
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpUpvalues(f, D)
|
||||
local n = f.sizeupvalues
|
||||
self:DumpInt(n, D)
|
||||
for i = 0, n - 1 do
|
||||
self:DumpString(f.upvalues[i], D)
|
||||
end
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dump constant pool from function prototype
|
||||
-- * nvalue(o) and tsvalue(o) macros removed
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpConstants(f, D)
|
||||
local n = f.sizek
|
||||
self:DumpInt(n, D)
|
||||
for i = 0, n - 1 do
|
||||
local o = f.k[i] -- TObject
|
||||
local tt = self:ttype(o)
|
||||
assert (tt >= 0)
|
||||
self:DumpByte(tt, D)
|
||||
if tt == self.LUA_TNUMBER then
|
||||
self:DumpNumber(o.value, D)
|
||||
elseif tt == self.LUA_TSTRING then
|
||||
self:DumpString(o.value, D)
|
||||
elseif tt == self.LUA_TBOOLEAN then
|
||||
self:DumpByte (o.value and 1 or 0, D)
|
||||
elseif tt == self.LUA_TNIL then
|
||||
else
|
||||
assert(false) -- cannot happen
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
|
||||
function luaU:DumpProtos (f, D)
|
||||
local n = f.sizep
|
||||
assert (n)
|
||||
self:DumpInt(n, D)
|
||||
for i = 0, n - 1 do
|
||||
self:DumpFunction(f.p[i], f.source, D)
|
||||
end
|
||||
end
|
||||
|
||||
function luaU:DumpDebug(f, D)
|
||||
self:DumpLines(f, D)
|
||||
self:DumpLocals(f, D)
|
||||
self:DumpUpvalues(f, D)
|
||||
end
|
||||
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dump child function prototypes from function prototype
|
||||
--FF completely reworked for 5.1 format
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpFunction(f, p, D)
|
||||
-- print "Dumping function:"
|
||||
-- table.print(f, 60)
|
||||
|
||||
local source = f.source
|
||||
if source == p then source = nil end
|
||||
self:DumpString(source, D)
|
||||
self:DumpInt(f.lineDefined, D)
|
||||
self:DumpInt(f.lastLineDefined or 42, D)
|
||||
self:DumpByte(f.nups, D)
|
||||
self:DumpByte(f.numparams, D)
|
||||
self:DumpByte(f.is_vararg, D)
|
||||
self:DumpByte(f.maxstacksize, D)
|
||||
self:DumpCode(f, D)
|
||||
self:DumpConstants(f, D)
|
||||
self:DumpProtos( f, D)
|
||||
self:DumpDebug(f, D)
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dump Lua header section (some sizes hard-coded)
|
||||
--FF: updated for version 5.1
|
||||
------------------------------------------------------------------------
|
||||
function luaU:DumpHeader(D)
|
||||
self:DumpLiteral(format.header, D)
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- dump function as precompiled chunk
|
||||
-- * w, data are created from make_setS, make_setF
|
||||
--FF: suppressed extraneous [L] param
|
||||
------------------------------------------------------------------------
|
||||
function luaU:dump (Main, w, data)
|
||||
local D = {} -- DumpState
|
||||
D.write = w
|
||||
D.data = data
|
||||
self:DumpHeader(D)
|
||||
self:DumpFunction(Main, nil, D)
|
||||
-- added: for a chunk writer writing to a file, this final call with
|
||||
-- nil data is to indicate to the writer to close the file
|
||||
D.write(nil, D.data)
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- find byte order (from lundump.c)
|
||||
-- * hard-coded to little-endian
|
||||
------------------------------------------------------------------------
|
||||
function luaU:endianness()
|
||||
return 1
|
||||
end
|
||||
|
||||
-- FIXME: ugly concat-base generation in [make_setS], bufferize properly!
|
||||
function M.dump_string (proto)
|
||||
local writer, buff = luaU:make_setS()
|
||||
luaU:dump (proto, writer, buff)
|
||||
return buff.data
|
||||
end
|
||||
|
||||
-- FIXME: [make_setS] sucks, perform synchronous file writing
|
||||
-- Now unused
|
||||
function M.dump_file (proto, filename)
|
||||
local writer, buff = luaU:make_setS()
|
||||
luaU:dump (proto, writer, buff)
|
||||
local file = io.open (filename, "wb")
|
||||
file:write (buff.data)
|
||||
io.close(file)
|
||||
--if UNIX_SHARPBANG then os.execute ("chmod a+x "..filename) end
|
||||
end
|
||||
|
||||
return M
|
|
@ -1,442 +0,0 @@
|
|||
-------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2005-2013 Kein-Hong Man, Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Kein-Hong Man - Initial implementation for Lua 5.0, part of Yueliang
|
||||
-- Fabien Fleutot - Port to Lua 5.1, integration with Metalua
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
--[[--------------------------------------------------------------------
|
||||
|
||||
$Id$
|
||||
|
||||
lopcodes.lua
|
||||
Lua 5 virtual machine opcodes in Lua
|
||||
This file is part of Yueliang.
|
||||
|
||||
Copyright (c) 2005 Kein-Hong Man <khman@users.sf.net>
|
||||
The COPYRIGHT file describes the conditions
|
||||
under which this software may be distributed.
|
||||
|
||||
See the ChangeLog for more information.
|
||||
|
||||
------------------------------------------------------------------------
|
||||
|
||||
[FF] Slightly modified, mainly to produce Lua 5.1 bytecode.
|
||||
|
||||
----------------------------------------------------------------------]]
|
||||
|
||||
--[[--------------------------------------------------------------------
|
||||
-- Notes:
|
||||
-- * an Instruction is a table with OP, A, B, C, Bx elements; this
|
||||
-- should allow instruction handling to work with doubles and ints
|
||||
-- * Added:
|
||||
-- luaP:Instruction(i): convert field elements to a 4-char string
|
||||
-- luaP:DecodeInst(x): convert 4-char string into field elements
|
||||
-- * WARNING luaP:Instruction outputs instructions encoded in little-
|
||||
-- endian form and field size and positions are hard-coded
|
||||
----------------------------------------------------------------------]]
|
||||
|
||||
local function debugf() end
|
||||
|
||||
local luaP = { }
|
||||
|
||||
--[[
|
||||
===========================================================================
|
||||
We assume that instructions are unsigned numbers.
|
||||
All instructions have an opcode in the first 6 bits.
|
||||
Instructions can have the following fields:
|
||||
'A' : 8 bits
|
||||
'B' : 9 bits
|
||||
'C' : 9 bits
|
||||
'Bx' : 18 bits ('B' and 'C' together)
|
||||
'sBx' : signed Bx
|
||||
|
||||
A signed argument is represented in excess K; that is, the number
|
||||
value is the unsigned value minus K. K is exactly the maximum value
|
||||
for that argument (so that -max is represented by 0, and +max is
|
||||
represented by 2*max), which is half the maximum for the corresponding
|
||||
unsigned argument.
|
||||
===========================================================================
|
||||
--]]
|
||||
|
||||
luaP.OpMode = {"iABC", "iABx", "iAsBx"} -- basic instruction format
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- size and position of opcode arguments.
|
||||
-- * WARNING size and position is hard-coded elsewhere in this script
|
||||
------------------------------------------------------------------------
|
||||
luaP.SIZE_C = 9
|
||||
luaP.SIZE_B = 9
|
||||
luaP.SIZE_Bx = luaP.SIZE_C + luaP.SIZE_B
|
||||
luaP.SIZE_A = 8
|
||||
|
||||
luaP.SIZE_OP = 6
|
||||
|
||||
luaP.POS_C = luaP.SIZE_OP
|
||||
luaP.POS_B = luaP.POS_C + luaP.SIZE_C
|
||||
luaP.POS_Bx = luaP.POS_C
|
||||
luaP.POS_A = luaP.POS_B + luaP.SIZE_B
|
||||
|
||||
--FF from 5.1
|
||||
luaP.BITRK = 2^(luaP.SIZE_B - 1)
|
||||
function luaP:ISK(x) return x >= self.BITRK end
|
||||
luaP.MAXINDEXRK = luaP.BITRK - 1
|
||||
function luaP:RKASK(x)
|
||||
if x < self.BITRK then return x+self.BITRK else return x end
|
||||
end
|
||||
|
||||
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- limits for opcode arguments.
|
||||
-- we use (signed) int to manipulate most arguments,
|
||||
-- so they must fit in BITS_INT-1 bits (-1 for sign)
|
||||
------------------------------------------------------------------------
|
||||
-- removed "#if SIZE_Bx < BITS_INT-1" test, assume this script is
|
||||
-- running on a Lua VM with double or int as LUA_NUMBER
|
||||
|
||||
luaP.MAXARG_Bx = math.ldexp(1, luaP.SIZE_Bx) - 1
|
||||
luaP.MAXARG_sBx = math.floor(luaP.MAXARG_Bx / 2) -- 'sBx' is signed
|
||||
|
||||
luaP.MAXARG_A = math.ldexp(1, luaP.SIZE_A) - 1
|
||||
luaP.MAXARG_B = math.ldexp(1, luaP.SIZE_B) - 1
|
||||
luaP.MAXARG_C = math.ldexp(1, luaP.SIZE_C) - 1
|
||||
|
||||
-- creates a mask with 'n' 1 bits at position 'p'
|
||||
-- MASK1(n,p) deleted
|
||||
-- creates a mask with 'n' 0 bits at position 'p'
|
||||
-- MASK0(n,p) deleted
|
||||
|
||||
--[[--------------------------------------------------------------------
|
||||
Visual representation for reference:
|
||||
|
||||
31 | | | 0 bit position
|
||||
+-----+-----+-----+----------+
|
||||
| B | C | A | Opcode | iABC format
|
||||
+-----+-----+-----+----------+
|
||||
- 9 - 9 - 8 - 6 - field sizes
|
||||
+-----+-----+-----+----------+
|
||||
| [s]Bx | A | Opcode | iABx | iAsBx format
|
||||
+-----+-----+-----+----------+
|
||||
----------------------------------------------------------------------]]
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- the following macros help to manipulate instructions
|
||||
-- * changed to a table object representation, very clean compared to
|
||||
-- the [nightmare] alternatives of using a number or a string
|
||||
------------------------------------------------------------------------
|
||||
|
||||
-- these accept or return opcodes in the form of string names
|
||||
function luaP:GET_OPCODE(i) return self.ROpCode[i.OP] end
|
||||
function luaP:SET_OPCODE(i, o) i.OP = self.OpCode[o] end
|
||||
|
||||
function luaP:GETARG_A(i) return i.A end
|
||||
function luaP:SETARG_A(i, u) i.A = u end
|
||||
|
||||
function luaP:GETARG_B(i) return i.B end
|
||||
function luaP:SETARG_B(i, b) i.B = b end
|
||||
|
||||
function luaP:GETARG_C(i) return i.C end
|
||||
function luaP:SETARG_C(i, b) i.C = b end
|
||||
|
||||
function luaP:GETARG_Bx(i) return i.Bx end
|
||||
function luaP:SETARG_Bx(i, b) i.Bx = b end
|
||||
|
||||
function luaP:GETARG_sBx(i) return i.Bx - self.MAXARG_sBx end
|
||||
function luaP:SETARG_sBx(i, b) i.Bx = b + self.MAXARG_sBx end
|
||||
|
||||
function luaP:CREATE_ABC(o,a,b,c)
|
||||
return {OP = self.OpCode[o], A = a, B = b, C = c}
|
||||
end
|
||||
|
||||
function luaP:CREATE_ABx(o,a,bc)
|
||||
return {OP = self.OpCode[o], A = a, Bx = bc}
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- Bit shuffling stuffs
|
||||
------------------------------------------------------------------------
|
||||
|
||||
if false and pcall (require, 'bit') then
|
||||
------------------------------------------------------------------------
|
||||
-- Return a 4-char string little-endian encoded form of an instruction
|
||||
------------------------------------------------------------------------
|
||||
function luaP:Instruction(i)
|
||||
--FIXME
|
||||
end
|
||||
else
|
||||
------------------------------------------------------------------------
|
||||
-- Version without bit manipulation library.
|
||||
------------------------------------------------------------------------
|
||||
local p2 = {1,2,4,8,16,32,64,128,256, 512, 1024, 2048, 4096}
|
||||
-- keeps [n] bits from [x]
|
||||
local function keep (x, n) return x % p2[n+1] end
|
||||
-- shifts bits of [x] [n] places to the right
|
||||
local function srb (x,n) return math.floor (x / p2[n+1]) end
|
||||
-- shifts bits of [x] [n] places to the left
|
||||
local function slb (x,n) return x * p2[n+1] end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- Return a 4-char string little-endian encoded form of an instruction
|
||||
------------------------------------------------------------------------
|
||||
function luaP:Instruction(i)
|
||||
-- printf("Instr->string: %s %s", self.opnames[i.OP], table.tostring(i))
|
||||
local c0, c1, c2, c3
|
||||
-- change to OP/A/B/C format if needed
|
||||
if i.Bx then i.C = keep (i.Bx, 9); i.B = srb (i.Bx, 9) end
|
||||
-- c0 = 6B from opcode + 2LSB from A (flushed to MSB)
|
||||
c0 = i.OP + slb (keep (i.A, 2), 6)
|
||||
-- c1 = 6MSB from A + 2LSB from C (flushed to MSB)
|
||||
c1 = srb (i.A, 2) + slb (keep (i.C, 2), 6)
|
||||
-- c2 = 7MSB from C + 1LSB from B (flushed to MSB)
|
||||
c2 = srb (i.C, 2) + slb (keep (i.B, 1), 7)
|
||||
-- c3 = 8MSB from B
|
||||
c3 = srb (i.B, 1)
|
||||
--printf ("Instruction: %s %s", self.opnames[i.OP], tostringv (i))
|
||||
--printf ("Bin encoding: %x %x %x %x", c0, c1, c2, c3)
|
||||
return string.char(c0, c1, c2, c3)
|
||||
end
|
||||
end
|
||||
------------------------------------------------------------------------
|
||||
-- decodes a 4-char little-endian string into an instruction struct
|
||||
------------------------------------------------------------------------
|
||||
function luaP:DecodeInst(x)
|
||||
error "Not implemented"
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- invalid register that fits in 8 bits
|
||||
------------------------------------------------------------------------
|
||||
luaP.NO_REG = luaP.MAXARG_A
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- R(x) - register
|
||||
-- Kst(x) - constant (in constant table)
|
||||
-- RK(x) == if x < MAXSTACK then R(x) else Kst(x-MAXSTACK)
|
||||
------------------------------------------------------------------------
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- grep "ORDER OP" if you change these enums
|
||||
------------------------------------------------------------------------
|
||||
|
||||
--[[--------------------------------------------------------------------
|
||||
Lua virtual machine opcodes (enum OpCode):
|
||||
------------------------------------------------------------------------
|
||||
name args description
|
||||
------------------------------------------------------------------------
|
||||
OP_MOVE A B R(A) := R(B)
|
||||
OP_LOADK A Bx R(A) := Kst(Bx)
|
||||
OP_LOADBOOL A B C R(A) := (Bool)B; if (C) PC++
|
||||
OP_LOADNIL A B R(A) := ... := R(B) := nil
|
||||
OP_GETUPVAL A B R(A) := UpValue[B]
|
||||
OP_GETGLOBAL A Bx R(A) := Gbl[Kst(Bx)]
|
||||
OP_GETTABLE A B C R(A) := R(B)[RK(C)]
|
||||
OP_SETGLOBAL A Bx Gbl[Kst(Bx)] := R(A)
|
||||
OP_SETUPVAL A B UpValue[B] := R(A)
|
||||
OP_SETTABLE A B C R(A)[RK(B)] := RK(C)
|
||||
OP_NEWTABLE A B C R(A) := {} (size = B,C)
|
||||
OP_SELF A B C R(A+1) := R(B); R(A) := R(B)[RK(C)]
|
||||
OP_ADD A B C R(A) := RK(B) + RK(C)
|
||||
OP_SUB A B C R(A) := RK(B) - RK(C)
|
||||
OP_MUL A B C R(A) := RK(B) * RK(C)
|
||||
OP_DIV A B C R(A) := RK(B) / RK(C)
|
||||
OP_POW A B C R(A) := RK(B) ^ RK(C)
|
||||
OP_UNM A B R(A) := -R(B)
|
||||
OP_NOT A B R(A) := not R(B)
|
||||
OP_CONCAT A B C R(A) := R(B).. ... ..R(C)
|
||||
OP_JMP sBx PC += sBx
|
||||
OP_EQ A B C if ((RK(B) == RK(C)) ~= A) then pc++
|
||||
OP_LT A B C if ((RK(B) < RK(C)) ~= A) then pc++
|
||||
OP_LE A B C if ((RK(B) <= RK(C)) ~= A) then pc++
|
||||
OP_TEST A B C if (R(B) <=> C) then R(A) := R(B) else pc++
|
||||
OP_CALL A B C R(A), ... ,R(A+C-2) := R(A)(R(A+1), ... ,R(A+B-1))
|
||||
OP_TAILCALL A B C return R(A)(R(A+1), ... ,R(A+B-1))
|
||||
OP_RETURN A B return R(A), ... ,R(A+B-2) (see note)
|
||||
OP_FORLOOP A sBx R(A)+=R(A+2); if R(A) <?= R(A+1) then PC+= sBx
|
||||
OP_TFORLOOP A C R(A+2), ... ,R(A+2+C) := R(A)(R(A+1), R(A+2));
|
||||
if R(A+2) ~= nil then pc++
|
||||
OP_TFORPREP A sBx if type(R(A)) == table then R(A+1):=R(A), R(A):=next;
|
||||
PC += sBx
|
||||
OP_SETLIST A Bx R(A)[Bx-Bx%FPF+i] := R(A+i), 1 <= i <= Bx%FPF+1
|
||||
OP_SETLISTO A Bx (see note)
|
||||
OP_CLOSE A close all variables in the stack up to (>=) R(A)
|
||||
OP_CLOSURE A Bx R(A) := closure(KPROTO[Bx], R(A), ... ,R(A+n))
|
||||
----------------------------------------------------------------------]]
|
||||
|
||||
luaP.opnames = {} -- opcode names
|
||||
luaP.OpCode = {} -- lookup name -> number
|
||||
luaP.ROpCode = {} -- lookup number -> name
|
||||
|
||||
local i = 0
|
||||
for v in string.gfind([[
|
||||
MOVE -- 0
|
||||
LOADK
|
||||
LOADBOOL
|
||||
LOADNIL
|
||||
GETUPVAL
|
||||
GETGLOBAL -- 5
|
||||
GETTABLE
|
||||
SETGLOBAL
|
||||
SETUPVAL
|
||||
SETTABLE
|
||||
NEWTABLE -- 10
|
||||
SELF
|
||||
ADD
|
||||
SUB
|
||||
MUL
|
||||
DIV -- 15
|
||||
MOD
|
||||
POW
|
||||
UNM
|
||||
NOT
|
||||
LEN -- 20
|
||||
CONCAT
|
||||
JMP
|
||||
EQ
|
||||
LT
|
||||
LE -- 25
|
||||
TEST
|
||||
TESTSET
|
||||
CALL
|
||||
TAILCALL
|
||||
RETURN -- 30
|
||||
FORLOOP
|
||||
FORPREP
|
||||
TFORLOOP
|
||||
SETLIST
|
||||
CLOSE -- 35
|
||||
CLOSURE
|
||||
VARARG
|
||||
]], "[%a]+") do
|
||||
local n = "OP_"..v
|
||||
luaP.opnames[i] = v
|
||||
luaP.OpCode[n] = i
|
||||
luaP.ROpCode[i] = n
|
||||
i = i + 1
|
||||
end
|
||||
luaP.NUM_OPCODES = i
|
||||
|
||||
--[[
|
||||
===========================================================================
|
||||
Notes:
|
||||
(1) In OP_CALL, if (B == 0) then B = top. C is the number of returns - 1,
|
||||
and can be 0: OP_CALL then sets 'top' to last_result+1, so
|
||||
next open instruction (OP_CALL, OP_RETURN, OP_SETLIST) may use 'top'.
|
||||
|
||||
(2) In OP_RETURN, if (B == 0) then return up to 'top'
|
||||
|
||||
(3) For comparisons, B specifies what conditions the test should accept.
|
||||
|
||||
(4) All 'skips' (pc++) assume that next instruction is a jump
|
||||
|
||||
(5) OP_SETLISTO is used when the last item in a table constructor is a
|
||||
function, so the number of elements set is up to top of stack
|
||||
===========================================================================
|
||||
--]]
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- masks for instruction properties
|
||||
------------------------------------------------------------------------
|
||||
-- was enum OpModeMask:
|
||||
luaP.OpModeBreg = 2 -- B is a register
|
||||
luaP.OpModeBrk = 3 -- B is a register/constant
|
||||
luaP.OpModeCrk = 4 -- C is a register/constant
|
||||
luaP.OpModesetA = 5 -- instruction set register A
|
||||
luaP.OpModeK = 6 -- Bx is a constant
|
||||
luaP.OpModeT = 1 -- operator is a test
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- get opcode mode, e.g. "iABC"
|
||||
------------------------------------------------------------------------
|
||||
function luaP:getOpMode(m)
|
||||
--printv(m)
|
||||
--printv(self.OpCode[m])
|
||||
--printv(self.opmodes [self.OpCode[m]+1])
|
||||
return self.OpMode[tonumber(string.sub(self.opmodes[self.OpCode[m] + 1], 7, 7))]
|
||||
end
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- test an instruction property flag
|
||||
-- * b is a string, e.g. "OpModeBreg"
|
||||
------------------------------------------------------------------------
|
||||
function luaP:testOpMode(m, b)
|
||||
return (string.sub(self.opmodes[self.OpCode[m] + 1], self[b], self[b]) == "1")
|
||||
end
|
||||
|
||||
-- number of list items to accumulate before a SETLIST instruction
|
||||
-- (must be a power of 2)
|
||||
-- * used in lparser, lvm, ldebug, ltests
|
||||
luaP.LFIELDS_PER_FLUSH = 50 --FF updated to match 5.1
|
||||
|
||||
-- luaP_opnames[] is set above, as the luaP.opnames table
|
||||
-- opmode(t,b,bk,ck,sa,k,m) deleted
|
||||
|
||||
--[[--------------------------------------------------------------------
|
||||
Legend for luaP:opmodes:
|
||||
1 T -> T (is a test?)
|
||||
2 B -> B is a register
|
||||
3 b -> B is an RK register/constant combination
|
||||
4 C -> C is an RK register/constant combination
|
||||
5 A -> register A is set by the opcode
|
||||
6 K -> Bx is a constant
|
||||
7 m -> 1 if iABC layout,
|
||||
2 if iABx layout,
|
||||
3 if iAsBx layout
|
||||
----------------------------------------------------------------------]]
|
||||
|
||||
luaP.opmodes = {
|
||||
-- TBbCAKm opcode
|
||||
"0100101", -- OP_MOVE 0
|
||||
"0000112", -- OP_LOADK
|
||||
"0000101", -- OP_LOADBOOL
|
||||
"0100101", -- OP_LOADNIL
|
||||
"0000101", -- OP_GETUPVAL
|
||||
"0000112", -- OP_GETGLOBAL 5
|
||||
"0101101", -- OP_GETTABLE
|
||||
"0000012", -- OP_SETGLOBAL
|
||||
"0000001", -- OP_SETUPVAL
|
||||
"0011001", -- OP_SETTABLE
|
||||
"0000101", -- OP_NEWTABLE 10
|
||||
"0101101", -- OP_SELF
|
||||
"0011101", -- OP_ADD
|
||||
"0011101", -- OP_SUB
|
||||
"0011101", -- OP_MUL
|
||||
"0011101", -- OP_DIV 15
|
||||
"0011101", -- OP_MOD
|
||||
"0011101", -- OP_POW
|
||||
"0100101", -- OP_UNM
|
||||
"0100101", -- OP_NOT
|
||||
"0100101", -- OP_LEN 20
|
||||
"0101101", -- OP_CONCAT
|
||||
"0000003", -- OP_JMP
|
||||
"1011001", -- OP_EQ
|
||||
"1011001", -- OP_LT
|
||||
"1011001", -- OP_LE 25
|
||||
"1000101", -- OP_TEST
|
||||
"1100101", -- OP_TESTSET
|
||||
"0000001", -- OP_CALL
|
||||
"0000001", -- OP_TAILCALL
|
||||
"0000001", -- OP_RETURN 30
|
||||
"0000003", -- OP_FORLOOP
|
||||
"0000103", -- OP_FORPREP
|
||||
"1000101", -- OP_TFORLOOP
|
||||
"0000001", -- OP_SETLIST
|
||||
"0000001", -- OP_CLOSE 35
|
||||
"0000102", -- OP_CLOSURE
|
||||
"0000101" -- OP_VARARG
|
||||
}
|
||||
|
||||
return luaP
|
|
@ -1,86 +0,0 @@
|
|||
--------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
--*-lua-*-----------------------------------------------------------------------
|
||||
-- Override Lua's default compilation functions, so that they support Metalua
|
||||
-- rather than only plain Lua
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local mlc = require 'metalua.compiler'
|
||||
|
||||
local M = { }
|
||||
|
||||
-- Original versions
|
||||
local original_lua_versions = {
|
||||
load = load,
|
||||
loadfile = loadfile,
|
||||
loadstring = loadstring,
|
||||
dofile = dofile }
|
||||
|
||||
local lua_loadstring = loadstring
|
||||
local lua_loadfile = loadfile
|
||||
|
||||
function M.loadstring(str, name)
|
||||
if type(str) ~= 'string' then error 'string expected' end
|
||||
if str:match '^\027LuaQ' then return lua_loadstring(str) end
|
||||
local n = str:match '^#![^\n]*\n()'
|
||||
if n then str=str:sub(n, -1) end
|
||||
-- FIXME: handle erroneous returns (return nil + error msg)
|
||||
return mlc.new():src_to_function(str, name)
|
||||
end
|
||||
|
||||
function M.loadfile(filename)
|
||||
local f, err_msg = io.open(filename, 'rb')
|
||||
if not f then return nil, err_msg end
|
||||
local success, src = pcall( f.read, f, '*a')
|
||||
pcall(f.close, f)
|
||||
if success then return M.loadstring (src, '@'..filename)
|
||||
else return nil, src end
|
||||
end
|
||||
|
||||
function M.load(f, name)
|
||||
local acc = { }
|
||||
while true do
|
||||
local x = f()
|
||||
if not x then break end
|
||||
assert(type(x)=='string', "function passed to load() must return strings")
|
||||
table.insert(acc, x)
|
||||
end
|
||||
return M.loadstring(table.concat(acc))
|
||||
end
|
||||
|
||||
function M.dostring(src)
|
||||
local f, msg = M.loadstring(src)
|
||||
if not f then error(msg) end
|
||||
return f()
|
||||
end
|
||||
|
||||
function M.dofile(name)
|
||||
local f, msg = M.loadfile(name)
|
||||
if not f then error(msg) end
|
||||
return f()
|
||||
end
|
||||
|
||||
-- Export replacement functions as globals
|
||||
for name, f in pairs(M) do _G[name] = f end
|
||||
|
||||
-- To be done *after* exportation
|
||||
M.lua = original_lua_versions
|
||||
|
||||
return M
|
|
@ -1,42 +0,0 @@
|
|||
--------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
-- Export all public APIs from sub-modules, squashed into a flat spacename
|
||||
|
||||
local MT = { __type='metalua.compiler.parser' }
|
||||
|
||||
local MODULE_REL_NAMES = { "annot.grammar", "expr", "meta", "misc",
|
||||
"stat", "table", "ext" }
|
||||
|
||||
local function new()
|
||||
local M = {
|
||||
lexer = require "metalua.compiler.parser.lexer" ();
|
||||
extensions = { } }
|
||||
for _, rel_name in ipairs(MODULE_REL_NAMES) do
|
||||
local abs_name = "metalua.compiler.parser."..rel_name
|
||||
local extender = require (abs_name)
|
||||
if not M.extensions[abs_name] then
|
||||
if type (extender) == 'function' then extender(M) end
|
||||
M.extensions[abs_name] = extender
|
||||
end
|
||||
end
|
||||
return setmetatable(M, MT)
|
||||
end
|
||||
|
||||
return { new = new }
|
|
@ -1,48 +0,0 @@
|
|||
--------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
require 'checks'
|
||||
local gg = require 'metalua.grammar.generator'
|
||||
local M = { }
|
||||
|
||||
function M.opt(mlc, primary, a_type)
|
||||
checks('table', 'table|function', 'string')
|
||||
return gg.sequence{
|
||||
primary,
|
||||
gg.onkeyword{ "#", function() return assert(mlc.annot[a_type]) end },
|
||||
builder = function(x)
|
||||
local t, annot = unpack(x)
|
||||
return annot and { tag='Annot', t, annot } or t
|
||||
end }
|
||||
end
|
||||
|
||||
-- split a list of "foo" and "`Annot{foo, annot}" into a list of "foo"
|
||||
-- and a list of "annot".
|
||||
-- No annot list is returned if none of the elements were annotated.
|
||||
function M.split(lst)
|
||||
local x, a, some = { }, { }, false
|
||||
for i, p in ipairs(lst) do
|
||||
if p.tag=='Annot' then
|
||||
some, x[i], a[i] = true, unpack(p)
|
||||
else x[i] = p end
|
||||
end
|
||||
if some then return x, a else return lst end
|
||||
end
|
||||
|
||||
return M
|
|
@ -1,112 +0,0 @@
|
|||
--------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local gg = require 'metalua.grammar.generator'
|
||||
|
||||
return function(M)
|
||||
local _M = gg.future(M)
|
||||
M.lexer :add '->'
|
||||
local A = { }
|
||||
local _A = gg.future(A)
|
||||
M.annot = A
|
||||
|
||||
-- Type identifier: Lua keywords such as `"nil"` allowed.
|
||||
function M.annot.tid(lx)
|
||||
local w = lx :next()
|
||||
local t = w.tag
|
||||
if t=='Keyword' and w[1] :match '^[%a_][%w_]*$' or w.tag=='Id'
|
||||
then return {tag='TId'; lineinfo=w.lineinfo; w[1]}
|
||||
else return gg.parse_error (lx, 'tid expected') end
|
||||
end
|
||||
|
||||
local field_types = { var='TVar'; const='TConst';
|
||||
currently='TCurrently'; field='TField' }
|
||||
|
||||
-- TODO check lineinfo
|
||||
function M.annot.tf(lx)
|
||||
local tk = lx:next()
|
||||
local w = tk[1]
|
||||
local tag = field_types[w]
|
||||
if not tag then error ('Invalid field type '..w)
|
||||
elseif tag=='TField' then return {tag='TField'} else
|
||||
local te = M.te(lx)
|
||||
return {tag=tag; te}
|
||||
end
|
||||
end
|
||||
|
||||
M.annot.tebar_content = gg.list{
|
||||
name = 'tebar content',
|
||||
primary = _A.te,
|
||||
separators = { ",", ";" },
|
||||
terminators = ")" }
|
||||
|
||||
M.annot.tebar = gg.multisequence{
|
||||
name = 'annot.tebar',
|
||||
--{ '*', builder = 'TDynbar' }, -- maybe not user-available
|
||||
{ '(', _A.tebar_content, ')',
|
||||
builder = function(x) return x[1] end },
|
||||
{ _A.te }
|
||||
}
|
||||
|
||||
M.annot.te = gg.multisequence{
|
||||
name = 'annot.te',
|
||||
{ _A.tid, builder=function(x) return x[1] end },
|
||||
{ '*', builder = 'TDyn' },
|
||||
{ "[",
|
||||
gg.list{
|
||||
primary = gg.sequence{
|
||||
_M.expr, "=", _A.tf,
|
||||
builder = 'TPair'
|
||||
},
|
||||
separators = { ",", ";" },
|
||||
terminators = { "]", "|" } },
|
||||
gg.onkeyword{ "|", _A.tf },
|
||||
"]",
|
||||
builder = function(x)
|
||||
local fields, other = unpack(x)
|
||||
return { tag='TTable', other or {tag='TField'}, fields }
|
||||
end }, -- "[ ... ]"
|
||||
{ '(', _A.tebar_content, ')', '->', '(', _A.tebar_content, ')',
|
||||
builder = function(x)
|
||||
local p, r = unpack(x)
|
||||
return {tag='TFunction', p, r }
|
||||
end } }
|
||||
|
||||
M.annot.ts = gg.multisequence{
|
||||
name = 'annot.ts',
|
||||
{ 'return', _A.tebar_content, builder='TReturn' },
|
||||
{ _A.tid, builder = function(x)
|
||||
if x[1][1]=='pass' then return {tag='TPass'}
|
||||
else error "Bad statement type" end
|
||||
end } }
|
||||
|
||||
-- TODO: add parsers for statements:
|
||||
-- #return tebar
|
||||
-- #alias = te
|
||||
-- #ell = tf
|
||||
--[[
|
||||
M.annot.stat_annot = gg.sequence{
|
||||
gg.list{ primary=_A.tid, separators='.' },
|
||||
'=',
|
||||
XXX??,
|
||||
builder = 'Annot' }
|
||||
--]]
|
||||
|
||||
return M.annot
|
||||
end
|
|
@ -1,27 +0,0 @@
|
|||
--------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
-- Shared common parser table. It will be filled by parser.init(),
|
||||
-- and every other module will be able to call its elements at runtime.
|
||||
--
|
||||
-- If the table was directly created in parser.init, a circular
|
||||
-- dependency would be created: parser.init depends on other modules to fill the table,
|
||||
-- so other modules can't simultaneously depend on it.
|
||||
|
||||
return { }
|
|
@ -1,206 +0,0 @@
|
|||
-------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
-------------------------------------------------------------------------------
|
||||
--
|
||||
-- Exported API:
|
||||
-- * [mlp.expr()]
|
||||
-- * [mlp.expr_list()]
|
||||
-- * [mlp.func_val()]
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
local pp = require 'metalua.pprint'
|
||||
local gg = require 'metalua.grammar.generator'
|
||||
local annot = require 'metalua.compiler.parser.annot.generator'
|
||||
|
||||
return function(M)
|
||||
local _M = gg.future(M)
|
||||
local _table = gg.future(M, 'table')
|
||||
local _meta = gg.future(M, 'meta') -- TODO move to ext?
|
||||
local _annot = gg.future(M, 'annot') -- TODO move to annot
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Non-empty expression list. Actually, this isn't used here, but that's
|
||||
-- handy to give to users.
|
||||
--------------------------------------------------------------------------------
|
||||
M.expr_list = gg.list{ primary=_M.expr, separators="," }
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Helpers for function applications / method applications
|
||||
--------------------------------------------------------------------------------
|
||||
M.func_args_content = gg.list{
|
||||
name = "function arguments",
|
||||
primary = _M.expr,
|
||||
separators = ",",
|
||||
terminators = ")" }
|
||||
|
||||
-- Used to parse methods
|
||||
M.method_args = gg.multisequence{
|
||||
name = "function argument(s)",
|
||||
{ "{", _table.content, "}" },
|
||||
{ "(", _M.func_args_content, ")", builder = unpack },
|
||||
{ "+{", _meta.quote_content, "}" },
|
||||
-- TODO lineinfo?
|
||||
function(lx) local r = M.opt_string(lx); return r and {r} or { } end }
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- [func_val] parses a function, from opening parameters parenthese to
|
||||
-- "end" keyword included. Used for anonymous functions as well as
|
||||
-- function declaration statements (both local and global).
|
||||
--
|
||||
-- It's wrapped in a [_func_val] eta expansion, so that when expr
|
||||
-- parser uses the latter, they will notice updates of [func_val]
|
||||
-- definitions.
|
||||
--------------------------------------------------------------------------------
|
||||
M.func_params_content = gg.list{
|
||||
name="function parameters",
|
||||
gg.multisequence{ { "...", builder = "Dots" }, annot.opt(M, _M.id, 'te') },
|
||||
separators = ",", terminators = {")", "|"} }
|
||||
|
||||
-- TODO move to annot
|
||||
M.func_val = gg.sequence{
|
||||
name = "function body",
|
||||
"(", _M.func_params_content, ")", _M.block, "end",
|
||||
builder = function(x)
|
||||
local params, body = unpack(x)
|
||||
local annots, some = { }, false
|
||||
for i, p in ipairs(params) do
|
||||
if p.tag=='Annot' then
|
||||
params[i], annots[i], some = p[1], p[2], true
|
||||
else annots[i] = false end
|
||||
end
|
||||
if some then return { tag='Function', params, body, annots }
|
||||
else return { tag='Function', params, body } end
|
||||
end }
|
||||
|
||||
local func_val = function(lx) return M.func_val(lx) end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Default parser for primary expressions
|
||||
--------------------------------------------------------------------------------
|
||||
function M.id_or_literal (lx)
|
||||
local a = lx:next()
|
||||
if a.tag~="Id" and a.tag~="String" and a.tag~="Number" then
|
||||
local msg
|
||||
if a.tag=='Eof' then
|
||||
msg = "End of file reached when an expression was expected"
|
||||
elseif a.tag=='Keyword' then
|
||||
msg = "An expression was expected, and `"..a[1]..
|
||||
"' can't start an expression"
|
||||
else
|
||||
msg = "Unexpected expr token " .. pp.tostring (a)
|
||||
end
|
||||
gg.parse_error (lx, msg)
|
||||
end
|
||||
return a
|
||||
end
|
||||
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Builder generator for operators. Wouldn't be worth it if "|x|" notation
|
||||
-- were allowed, but then lua 5.1 wouldn't compile it
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
-- opf1 = |op| |_,a| `Op{ op, a }
|
||||
local function opf1 (op) return
|
||||
function (_,a) return { tag="Op", op, a } end end
|
||||
|
||||
-- opf2 = |op| |a,_,b| `Op{ op, a, b }
|
||||
local function opf2 (op) return
|
||||
function (a,_,b) return { tag="Op", op, a, b } end end
|
||||
|
||||
-- opf2r = |op| |a,_,b| `Op{ op, b, a } -- (args reversed)
|
||||
local function opf2r (op) return
|
||||
function (a,_,b) return { tag="Op", op, b, a } end end
|
||||
|
||||
local function op_ne(a, _, b)
|
||||
-- This version allows to remove the "ne" operator from the AST definition.
|
||||
-- However, it doesn't always produce the exact same bytecode as Lua 5.1.
|
||||
return { tag="Op", "not",
|
||||
{ tag="Op", "eq", a, b, lineinfo= {
|
||||
first = a.lineinfo.first, last = b.lineinfo.last } } }
|
||||
end
|
||||
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
--
|
||||
-- complete expression
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
-- FIXME: set line number. In [expr] transformers probably
|
||||
M.expr = gg.expr {
|
||||
name = "expression",
|
||||
primary = gg.multisequence{
|
||||
name = "expr primary",
|
||||
{ "(", _M.expr, ")", builder = "Paren" },
|
||||
{ "function", _M.func_val, builder = unpack },
|
||||
{ "-{", _meta.splice_content, "}", builder = unpack },
|
||||
{ "+{", _meta.quote_content, "}", builder = unpack },
|
||||
{ "nil", builder = "Nil" },
|
||||
{ "true", builder = "True" },
|
||||
{ "false", builder = "False" },
|
||||
{ "...", builder = "Dots" },
|
||||
{ "{", _table.content, "}", builder = unpack },
|
||||
_M.id_or_literal },
|
||||
|
||||
infix = {
|
||||
name = "expr infix op",
|
||||
{ "+", prec = 60, builder = opf2 "add" },
|
||||
{ "-", prec = 60, builder = opf2 "sub" },
|
||||
{ "*", prec = 70, builder = opf2 "mul" },
|
||||
{ "/", prec = 70, builder = opf2 "div" },
|
||||
{ "%", prec = 70, builder = opf2 "mod" },
|
||||
{ "^", prec = 90, builder = opf2 "pow", assoc = "right" },
|
||||
{ "..", prec = 40, builder = opf2 "concat", assoc = "right" },
|
||||
{ "==", prec = 30, builder = opf2 "eq" },
|
||||
{ "~=", prec = 30, builder = op_ne },
|
||||
{ "<", prec = 30, builder = opf2 "lt" },
|
||||
{ "<=", prec = 30, builder = opf2 "le" },
|
||||
{ ">", prec = 30, builder = opf2r "lt" },
|
||||
{ ">=", prec = 30, builder = opf2r "le" },
|
||||
{ "and",prec = 20, builder = opf2 "and" },
|
||||
{ "or", prec = 10, builder = opf2 "or" } },
|
||||
|
||||
prefix = {
|
||||
name = "expr prefix op",
|
||||
{ "not", prec = 80, builder = opf1 "not" },
|
||||
{ "#", prec = 80, builder = opf1 "len" },
|
||||
{ "-", prec = 80, builder = opf1 "unm" } },
|
||||
|
||||
suffix = {
|
||||
name = "expr suffix op",
|
||||
{ "[", _M.expr, "]", builder = function (tab, idx)
|
||||
return {tag="Index", tab, idx[1]} end},
|
||||
{ ".", _M.id, builder = function (tab, field)
|
||||
return {tag="Index", tab, _M.id2string(field[1])} end },
|
||||
{ "(", _M.func_args_content, ")", builder = function(f, args)
|
||||
return {tag="Call", f, unpack(args[1])} end },
|
||||
{ "{", _table.content, "}", builder = function (f, arg)
|
||||
return {tag="Call", f, arg[1]} end},
|
||||
{ ":", _M.id, _M.method_args, builder = function (obj, post)
|
||||
local m_name, args = unpack(post)
|
||||
return {tag="Invoke", obj, _M.id2string(m_name), unpack(args)} end},
|
||||
{ "+{", _meta.quote_content, "}", builder = function (f, arg)
|
||||
return {tag="Call", f, arg[1] } end },
|
||||
default = { name="opt_string_arg", parse = _M.opt_string, builder = function(f, arg)
|
||||
return {tag="Call", f, arg } end } } }
|
||||
return M
|
||||
end
|
|
@ -1,96 +0,0 @@
|
|||
-------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
--
|
||||
-- Non-Lua syntax extensions
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local gg = require 'metalua.grammar.generator'
|
||||
|
||||
return function(M)
|
||||
|
||||
local _M = gg.future(M)
|
||||
|
||||
---------------------------------------------------------------------------
|
||||
-- Algebraic Datatypes
|
||||
----------------------------------------------------------------------------
|
||||
local function adt (lx)
|
||||
local node = _M.id (lx)
|
||||
local tagval = node[1]
|
||||
-- tagkey = `Pair{ `String "key", `String{ -{tagval} } }
|
||||
local tagkey = { tag="Pair", {tag="String", "tag"}, {tag="String", tagval} }
|
||||
if lx:peek().tag == "String" or lx:peek().tag == "Number" then
|
||||
-- TODO support boolean litterals
|
||||
return { tag="Table", tagkey, lx:next() }
|
||||
elseif lx:is_keyword (lx:peek(), "{") then
|
||||
local x = M.table.table (lx)
|
||||
table.insert (x, 1, tagkey)
|
||||
return x
|
||||
else return { tag="Table", tagkey } end
|
||||
end
|
||||
|
||||
M.adt = gg.sequence{ "`", adt, builder = unpack }
|
||||
|
||||
M.expr.primary :add(M.adt)
|
||||
|
||||
----------------------------------------------------------------------------
|
||||
-- Anonymous lambda
|
||||
----------------------------------------------------------------------------
|
||||
M.lambda_expr = gg.sequence{
|
||||
"|", _M.func_params_content, "|", _M.expr,
|
||||
builder = function (x)
|
||||
local li = x[2].lineinfo
|
||||
return { tag="Function", x[1],
|
||||
{ {tag="Return", x[2], lineinfo=li }, lineinfo=li } }
|
||||
end }
|
||||
|
||||
M.expr.primary :add (M.lambda_expr)
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Allows to write "a `f` b" instead of "f(a, b)". Taken from Haskell.
|
||||
--------------------------------------------------------------------------------
|
||||
function M.expr_in_backquotes (lx) return M.expr(lx, 35) end -- 35=limited precedence
|
||||
M.expr.infix :add{ name = "infix function",
|
||||
"`", _M.expr_in_backquotes, "`", prec = 35, assoc="left",
|
||||
builder = function(a, op, b) return {tag="Call", op[1], a, b} end }
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- C-style op+assignments
|
||||
-- TODO: no protection against side-effects in LHS vars.
|
||||
--------------------------------------------------------------------------------
|
||||
local function op_assign(kw, op)
|
||||
local function rhs(a, b) return { tag="Op", op, a, b } end
|
||||
local function f(a,b)
|
||||
if #a ~= #b then gg.parse_error "assymetric operator+assignment" end
|
||||
local right = { }
|
||||
local r = { tag="Set", a, right }
|
||||
for i=1, #a do right[i] = { tag="Op", op, a[i], b[i] } end
|
||||
return r
|
||||
end
|
||||
M.lexer :add (kw)
|
||||
M.assignments[kw] = f
|
||||
end
|
||||
|
||||
local ops = { add='+='; sub='-='; mul='*='; div='/=' }
|
||||
for ast_op_name, keyword in pairs(ops) do op_assign(keyword, ast_op_name) end
|
||||
|
||||
return M
|
||||
end
|
|
@ -1,43 +0,0 @@
|
|||
--------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2014 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- Generate a new lua-specific lexer, derived from the generic lexer.
|
||||
----------------------------------------------------------------------
|
||||
|
||||
local generic_lexer = require 'metalua.grammar.lexer'
|
||||
|
||||
return function()
|
||||
local lexer = generic_lexer.lexer :clone()
|
||||
|
||||
local keywords = {
|
||||
"and", "break", "do", "else", "elseif",
|
||||
"end", "false", "for", "function",
|
||||
"goto", -- Lua5.2
|
||||
"if",
|
||||
"in", "local", "nil", "not", "or", "repeat",
|
||||
"return", "then", "true", "until", "while",
|
||||
"...", "..", "==", ">=", "<=", "~=",
|
||||
"::", -- Lua5,2
|
||||
"+{", "-{" } -- Metalua
|
||||
|
||||
for _, w in ipairs(keywords) do lexer :add (w) end
|
||||
|
||||
return lexer
|
||||
end
|
|
@ -1,138 +0,0 @@
|
|||
-------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2014 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
-- Compile-time metaprogramming features: splicing ASTs generated during compilation,
|
||||
-- AST quasi-quoting helpers.
|
||||
|
||||
local gg = require 'metalua.grammar.generator'
|
||||
|
||||
return function(M)
|
||||
local _M = gg.future(M)
|
||||
M.meta={ }
|
||||
local _MM = gg.future(M.meta)
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- External splicing: compile an AST into a chunk, load and evaluate
|
||||
-- that chunk, and replace the chunk by its result (which must also be
|
||||
-- an AST).
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
-- TODO: that's not part of the parser
|
||||
function M.meta.eval (ast)
|
||||
-- TODO: should there be one mlc per splice, or per parser instance?
|
||||
local mlc = require 'metalua.compiler'.new()
|
||||
local f = mlc :ast_to_function (ast, '=splice')
|
||||
local result=f(M) -- splices act on the current parser
|
||||
return result
|
||||
end
|
||||
|
||||
----------------------------------------------------------------------------
|
||||
-- Going from an AST to an AST representing that AST
|
||||
-- the only hash-part key being lifted is `"tag"`.
|
||||
-- Doesn't lift subtrees protected inside a `Splice{ ... }.
|
||||
-- e.g. change `Foo{ 123 } into
|
||||
-- `Table{ `Pair{ `String "tag", `String "foo" }, `Number 123 }
|
||||
----------------------------------------------------------------------------
|
||||
local function lift (t)
|
||||
--print("QUOTING:", table.tostring(t, 60,'nohash'))
|
||||
local cases = { }
|
||||
function cases.table (t)
|
||||
local mt = { tag = "Table" }
|
||||
--table.insert (mt, { tag = "Pair", quote "quote", { tag = "True" } })
|
||||
if t.tag == "Splice" then
|
||||
assert (#t==1, "Invalid splice")
|
||||
local sp = t[1]
|
||||
return sp
|
||||
elseif t.tag then
|
||||
table.insert (mt, { tag="Pair", lift "tag", lift(t.tag) })
|
||||
end
|
||||
for _, v in ipairs (t) do
|
||||
table.insert (mt, lift(v))
|
||||
end
|
||||
return mt
|
||||
end
|
||||
function cases.number (t) return { tag = "Number", t, quote = true } end
|
||||
function cases.string (t) return { tag = "String", t, quote = true } end
|
||||
function cases.boolean (t) return { tag = t and "True" or "False", t, quote = true } end
|
||||
local f = cases [type(t)]
|
||||
if f then return f(t) else error ("Cannot quote an AST containing "..tostring(t)) end
|
||||
end
|
||||
M.meta.lift = lift
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- when this variable is false, code inside [-{...}] is compiled and
|
||||
-- avaluated immediately. When it's true (supposedly when we're
|
||||
-- parsing data inside a quasiquote), [-{foo}] is replaced by
|
||||
-- [`Splice{foo}], which will be unpacked by [quote()].
|
||||
--------------------------------------------------------------------------------
|
||||
local in_a_quote = false
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Parse the inside of a "-{ ... }"
|
||||
--------------------------------------------------------------------------------
|
||||
function M.meta.splice_content (lx)
|
||||
local parser_name = "expr"
|
||||
if lx:is_keyword (lx:peek(2), ":") then
|
||||
local a = lx:next()
|
||||
lx:next() -- skip ":"
|
||||
assert (a.tag=="Id", "Invalid splice parser name")
|
||||
parser_name = a[1]
|
||||
end
|
||||
-- TODO FIXME running a new parser with the old lexer?!
|
||||
local parser = require 'metalua.compiler.parser'.new()
|
||||
local ast = parser [parser_name](lx)
|
||||
if in_a_quote then -- only prevent quotation in this subtree
|
||||
--printf("SPLICE_IN_QUOTE:\n%s", _G.table.tostring(ast, "nohash", 60))
|
||||
return { tag="Splice", ast }
|
||||
else -- convert in a block, eval, replace with result
|
||||
if parser_name == "expr" then ast = { { tag="Return", ast } }
|
||||
elseif parser_name == "stat" then ast = { ast }
|
||||
elseif parser_name ~= "block" then
|
||||
error ("splice content must be an expr, stat or block") end
|
||||
--printf("EXEC THIS SPLICE:\n%s", _G.table.tostring(ast, "nohash", 60))
|
||||
return M.meta.eval (ast)
|
||||
end
|
||||
end
|
||||
|
||||
M.meta.splice = gg.sequence{ "-{", _MM.splice_content, "}", builder=unpack }
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Parse the inside of a "+{ ... }"
|
||||
--------------------------------------------------------------------------------
|
||||
function M.meta.quote_content (lx)
|
||||
local parser
|
||||
if lx:is_keyword (lx:peek(2), ":") then -- +{parser: content }
|
||||
local parser_name = M.id(lx)[1]
|
||||
parser = M[parser_name]
|
||||
lx:next() -- skip ":"
|
||||
else -- +{ content }
|
||||
parser = M.expr
|
||||
end
|
||||
|
||||
local prev_iq = in_a_quote
|
||||
in_a_quote = true
|
||||
--print("IN_A_QUOTE")
|
||||
local content = parser (lx)
|
||||
local q_content = M.meta.lift (content)
|
||||
in_a_quote = prev_iq
|
||||
return q_content
|
||||
end
|
||||
|
||||
return M
|
||||
end
|
|
@ -1,175 +0,0 @@
|
|||
-------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
-------------------------------------------------------------------------------
|
||||
--
|
||||
-- Summary: metalua parser, miscellaneous utility functions.
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
--
|
||||
-- Exported API:
|
||||
-- * [mlp.fget()]
|
||||
-- * [mlp.id()]
|
||||
-- * [mlp.opt_id()]
|
||||
-- * [mlp.id_list()]
|
||||
-- * [mlp.string()]
|
||||
-- * [mlp.opt_string()]
|
||||
-- * [mlp.id2string()]
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local gg = require 'metalua.grammar.generator'
|
||||
|
||||
-- TODO: replace splice-aware versions with naive ones, move etensions in ./meta
|
||||
|
||||
return function(M)
|
||||
local _M = gg.future(M)
|
||||
|
||||
--[[ metaprog-free versions:
|
||||
function M.id(lx)
|
||||
if lx:peek().tag~='Id' then gg.parse_error(lx, "Identifier expected")
|
||||
else return lx:next() end
|
||||
end
|
||||
|
||||
function M.opt_id(lx)
|
||||
if lx:peek().tag~='Id' then return lx:next() else return false end
|
||||
end
|
||||
|
||||
function M.string(lx)
|
||||
if lx:peek().tag~='String' then gg.parse_error(lx, "String expected")
|
||||
else return lx:next() end
|
||||
end
|
||||
|
||||
function M.opt_string(lx)
|
||||
if lx:peek().tag~='String' then return lx:next() else return false end
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Converts an identifier into a string. Hopefully one day it'll handle
|
||||
-- splices gracefully, but that proves quite tricky.
|
||||
--------------------------------------------------------------------------------
|
||||
function M.id2string (id)
|
||||
if id.tag == "Id" then id.tag = "String"; return id
|
||||
else error ("Identifier expected: "..table.tostring(id, 'nohash')) end
|
||||
end
|
||||
--]]
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Try to read an identifier (possibly as a splice), or return [false] if no
|
||||
-- id is found.
|
||||
--------------------------------------------------------------------------------
|
||||
function M.opt_id (lx)
|
||||
local a = lx:peek();
|
||||
if lx:is_keyword (a, "-{") then
|
||||
local v = M.meta.splice(lx)
|
||||
if v.tag ~= "Id" and v.tag ~= "Splice" then
|
||||
gg.parse_error(lx, "Bad id splice")
|
||||
end
|
||||
return v
|
||||
elseif a.tag == "Id" then return lx:next()
|
||||
else return false end
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Mandatory reading of an id: causes an error if it can't read one.
|
||||
--------------------------------------------------------------------------------
|
||||
function M.id (lx)
|
||||
return M.opt_id (lx) or gg.parse_error(lx,"Identifier expected")
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Common helper function
|
||||
--------------------------------------------------------------------------------
|
||||
M.id_list = gg.list { primary = _M.id, separators = "," }
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Converts an identifier into a string. Hopefully one day it'll handle
|
||||
-- splices gracefully, but that proves quite tricky.
|
||||
--------------------------------------------------------------------------------
|
||||
function M.id2string (id)
|
||||
--print("id2string:", disp.ast(id))
|
||||
if id.tag == "Id" then id.tag = "String"; return id
|
||||
elseif id.tag == "Splice" then
|
||||
error ("id2string on splice not implemented")
|
||||
-- Evaluating id[1] will produce `Id{ xxx },
|
||||
-- and we want it to produce `String{ xxx }.
|
||||
-- The following is the plain notation of:
|
||||
-- +{ `String{ `Index{ `Splice{ -{id[1]} }, `Number 1 } } }
|
||||
return { tag="String", { tag="Index", { tag="Splice", id[1] },
|
||||
{ tag="Number", 1 } } }
|
||||
else error ("Identifier expected: "..table.tostring(id, 'nohash')) end
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Read a string, possibly spliced, or return an error if it can't
|
||||
--------------------------------------------------------------------------------
|
||||
function M.string (lx)
|
||||
local a = lx:peek()
|
||||
if lx:is_keyword (a, "-{") then
|
||||
local v = M.meta.splice(lx)
|
||||
if v.tag ~= "String" and v.tag ~= "Splice" then
|
||||
gg.parse_error(lx,"Bad string splice")
|
||||
end
|
||||
return v
|
||||
elseif a.tag == "String" then return lx:next()
|
||||
else error "String expected" end
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Try to read a string, or return false if it can't. No splice allowed.
|
||||
--------------------------------------------------------------------------------
|
||||
function M.opt_string (lx)
|
||||
return lx:peek().tag == "String" and lx:next()
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Chunk reader: block + Eof
|
||||
--------------------------------------------------------------------------------
|
||||
function M.skip_initial_sharp_comment (lx)
|
||||
-- Dirty hack: I'm happily fondling lexer's private parts
|
||||
-- FIXME: redundant with lexer:newstream()
|
||||
lx :sync()
|
||||
local i = lx.src:match ("^#.-\n()", lx.i)
|
||||
if i then
|
||||
lx.i = i
|
||||
lx.column_offset = i
|
||||
lx.line = lx.line and lx.line + 1 or 1
|
||||
end
|
||||
end
|
||||
|
||||
local function chunk (lx)
|
||||
if lx:peek().tag == 'Eof' then
|
||||
return { } -- handle empty files
|
||||
else
|
||||
M.skip_initial_sharp_comment (lx)
|
||||
local chunk = M.block (lx)
|
||||
if lx:peek().tag ~= "Eof" then
|
||||
gg.parse_error(lx, "End-of-file expected")
|
||||
end
|
||||
return chunk
|
||||
end
|
||||
end
|
||||
|
||||
-- chunk is wrapped in a sequence so that it has a "transformer" field.
|
||||
M.chunk = gg.sequence { chunk, builder = unpack }
|
||||
|
||||
return M
|
||||
end
|
|
@ -1,279 +0,0 @@
|
|||
------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
-------------------------------------------------------------------------------
|
||||
--
|
||||
-- Summary: metalua parser, statement/block parser. This is part of the
|
||||
-- definition of module [mlp].
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
-------------------------------------------------------------------------------
|
||||
--
|
||||
-- Exports API:
|
||||
-- * [mlp.stat()]
|
||||
-- * [mlp.block()]
|
||||
-- * [mlp.for_header()]
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
local lexer = require 'metalua.grammar.lexer'
|
||||
local gg = require 'metalua.grammar.generator'
|
||||
|
||||
local annot = require 'metalua.compiler.parser.annot.generator'
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- List of all keywords that indicate the end of a statement block. Users are
|
||||
-- likely to extend this list when designing extensions.
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
|
||||
return function(M)
|
||||
local _M = gg.future(M)
|
||||
|
||||
M.block_terminators = { "else", "elseif", "end", "until", ")", "}", "]" }
|
||||
|
||||
-- FIXME: this must be handled from within GG!!!
|
||||
-- FIXME: there's no :add method in the list anyway. Added by gg.list?!
|
||||
function M.block_terminators :add(x)
|
||||
if type (x) == "table" then for _, y in ipairs(x) do self :add (y) end
|
||||
else table.insert (self, x) end
|
||||
end
|
||||
|
||||
----------------------------------------------------------------------------
|
||||
-- list of statements, possibly followed by semicolons
|
||||
----------------------------------------------------------------------------
|
||||
M.block = gg.list {
|
||||
name = "statements block",
|
||||
terminators = M.block_terminators,
|
||||
primary = function (lx)
|
||||
-- FIXME use gg.optkeyword()
|
||||
local x = M.stat (lx)
|
||||
if lx:is_keyword (lx:peek(), ";") then lx:next() end
|
||||
return x
|
||||
end }
|
||||
|
||||
----------------------------------------------------------------------------
|
||||
-- Helper function for "return <expr_list>" parsing.
|
||||
-- Called when parsing return statements.
|
||||
-- The specific test for initial ";" is because it's not a block terminator,
|
||||
-- so without it gg.list would choke on "return ;" statements.
|
||||
-- We don't make a modified copy of block_terminators because this list
|
||||
-- is sometimes modified at runtime, and the return parser would get out of
|
||||
-- sync if it was relying on a copy.
|
||||
----------------------------------------------------------------------------
|
||||
local return_expr_list_parser = gg.multisequence{
|
||||
{ ";" , builder = function() return { } end },
|
||||
default = gg.list {
|
||||
_M.expr, separators = ",", terminators = M.block_terminators } }
|
||||
|
||||
|
||||
local for_vars_list = gg.list{
|
||||
name = "for variables list",
|
||||
primary = _M.id,
|
||||
separators = ",",
|
||||
terminators = "in" }
|
||||
|
||||
----------------------------------------------------------------------------
|
||||
-- for header, between [for] and [do] (exclusive).
|
||||
-- Return the `Forxxx{...} AST, without the body element (the last one).
|
||||
----------------------------------------------------------------------------
|
||||
function M.for_header (lx)
|
||||
local vars = M.id_list(lx)
|
||||
if lx :is_keyword (lx:peek(), "=") then
|
||||
if #vars ~= 1 then
|
||||
gg.parse_error (lx, "numeric for only accepts one variable")
|
||||
end
|
||||
lx:next() -- skip "="
|
||||
local exprs = M.expr_list (lx)
|
||||
if #exprs < 2 or #exprs > 3 then
|
||||
gg.parse_error (lx, "numeric for requires 2 or 3 boundaries")
|
||||
end
|
||||
return { tag="Fornum", vars[1], unpack (exprs) }
|
||||
else
|
||||
if not lx :is_keyword (lx :next(), "in") then
|
||||
gg.parse_error (lx, '"=" or "in" expected in for loop')
|
||||
end
|
||||
local exprs = M.expr_list (lx)
|
||||
return { tag="Forin", vars, exprs }
|
||||
end
|
||||
end
|
||||
|
||||
----------------------------------------------------------------------------
|
||||
-- Function def parser helper: id ( . id ) *
|
||||
----------------------------------------------------------------------------
|
||||
local function fn_builder (list)
|
||||
local acc = list[1]
|
||||
local first = acc.lineinfo.first
|
||||
for i = 2, #list do
|
||||
local index = M.id2string(list[i])
|
||||
local li = lexer.new_lineinfo(first, index.lineinfo.last)
|
||||
acc = { tag="Index", acc, index, lineinfo=li }
|
||||
end
|
||||
return acc
|
||||
end
|
||||
local func_name = gg.list{ _M.id, separators = ".", builder = fn_builder }
|
||||
|
||||
----------------------------------------------------------------------------
|
||||
-- Function def parser helper: ( : id )?
|
||||
----------------------------------------------------------------------------
|
||||
local method_name = gg.onkeyword{ name = "method invocation", ":", _M.id,
|
||||
transformers = { function(x) return x and x.tag=='Id' and M.id2string(x) end } }
|
||||
|
||||
----------------------------------------------------------------------------
|
||||
-- Function def builder
|
||||
----------------------------------------------------------------------------
|
||||
local function funcdef_builder(x)
|
||||
local name, method, func = unpack(x)
|
||||
if method then
|
||||
name = { tag="Index", name, method,
|
||||
lineinfo = {
|
||||
first = name.lineinfo.first,
|
||||
last = method.lineinfo.last } }
|
||||
table.insert (func[1], 1, {tag="Id", "self"})
|
||||
end
|
||||
local r = { tag="Set", {name}, {func} }
|
||||
r[1].lineinfo = name.lineinfo
|
||||
r[2].lineinfo = func.lineinfo
|
||||
return r
|
||||
end
|
||||
|
||||
|
||||
----------------------------------------------------------------------------
|
||||
-- if statement builder
|
||||
----------------------------------------------------------------------------
|
||||
local function if_builder (x)
|
||||
local cond_block_pairs, else_block, r = x[1], x[2], {tag="If"}
|
||||
local n_pairs = #cond_block_pairs
|
||||
for i = 1, n_pairs do
|
||||
local cond, block = unpack(cond_block_pairs[i])
|
||||
r[2*i-1], r[2*i] = cond, block
|
||||
end
|
||||
if else_block then table.insert(r, #r+1, else_block) end
|
||||
return r
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- produce a list of (expr,block) pairs
|
||||
--------------------------------------------------------------------------------
|
||||
local elseifs_parser = gg.list {
|
||||
gg.sequence { _M.expr, "then", _M.block , name='elseif parser' },
|
||||
separators = "elseif",
|
||||
terminators = { "else", "end" }
|
||||
}
|
||||
|
||||
local annot_expr = gg.sequence {
|
||||
_M.expr,
|
||||
gg.onkeyword{ "#", gg.future(M, 'annot').tf },
|
||||
builder = function(x)
|
||||
local e, a = unpack(x)
|
||||
if a then return { tag='Annot', e, a }
|
||||
else return e end
|
||||
end }
|
||||
|
||||
local annot_expr_list = gg.list {
|
||||
primary = annot.opt(M, _M.expr, 'tf'), separators = ',' }
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- assignments and calls: statements that don't start with a keyword
|
||||
------------------------------------------------------------------------
|
||||
local function assign_or_call_stat_parser (lx)
|
||||
local e = annot_expr_list (lx)
|
||||
local a = lx:is_keyword(lx:peek())
|
||||
local op = a and M.assignments[a]
|
||||
-- TODO: refactor annotations
|
||||
if op then
|
||||
--FIXME: check that [e] is a LHS
|
||||
lx :next()
|
||||
local annots
|
||||
e, annots = annot.split(e)
|
||||
local v = M.expr_list (lx)
|
||||
if type(op)=="string" then return { tag=op, e, v, annots }
|
||||
else return op (e, v) end
|
||||
else
|
||||
assert (#e > 0)
|
||||
if #e > 1 then
|
||||
gg.parse_error (lx,
|
||||
"comma is not a valid statement separator; statement can be "..
|
||||
"separated by semicolons, or not separated at all")
|
||||
elseif e[1].tag ~= "Call" and e[1].tag ~= "Invoke" then
|
||||
local typename
|
||||
if e[1].tag == 'Id' then
|
||||
typename = '("'..e[1][1]..'") is an identifier'
|
||||
elseif e[1].tag == 'Op' then
|
||||
typename = "is an arithmetic operation"
|
||||
else typename = "is of type '"..(e[1].tag or "<list>").."'" end
|
||||
gg.parse_error (lx,
|
||||
"This expression %s; "..
|
||||
"a statement was expected, and only function and method call "..
|
||||
"expressions can be used as statements", typename);
|
||||
end
|
||||
return e[1]
|
||||
end
|
||||
end
|
||||
|
||||
M.local_stat_parser = gg.multisequence{
|
||||
-- local function <name> <func_val>
|
||||
{ "function", _M.id, _M.func_val, builder =
|
||||
function(x)
|
||||
local vars = { x[1], lineinfo = x[1].lineinfo }
|
||||
local vals = { x[2], lineinfo = x[2].lineinfo }
|
||||
return { tag="Localrec", vars, vals }
|
||||
end },
|
||||
-- local <id_list> ( = <expr_list> )?
|
||||
default = gg.sequence{
|
||||
gg.list{
|
||||
primary = annot.opt(M, _M.id, 'tf'),
|
||||
separators = ',' },
|
||||
gg.onkeyword{ "=", _M.expr_list },
|
||||
builder = function(x)
|
||||
local annotated_left, right = unpack(x)
|
||||
local left, annotations = annot.split(annotated_left)
|
||||
return {tag="Local", left, right or { }, annotations }
|
||||
end } }
|
||||
|
||||
------------------------------------------------------------------------
|
||||
-- statement
|
||||
------------------------------------------------------------------------
|
||||
M.stat = gg.multisequence {
|
||||
name = "statement",
|
||||
{ "do", _M.block, "end", builder =
|
||||
function (x) return { tag="Do", unpack (x[1]) } end },
|
||||
{ "for", _M.for_header, "do", _M.block, "end", builder =
|
||||
function (x) x[1][#x[1]+1] = x[2]; return x[1] end },
|
||||
{ "function", func_name, method_name, _M.func_val, builder=funcdef_builder },
|
||||
{ "while", _M.expr, "do", _M.block, "end", builder = "While" },
|
||||
{ "repeat", _M.block, "until", _M.expr, builder = "Repeat" },
|
||||
{ "local", _M.local_stat_parser, builder = unpack },
|
||||
{ "return", return_expr_list_parser, builder =
|
||||
function(x) x[1].tag='Return'; return x[1] end },
|
||||
{ "break", builder = function() return { tag="Break" } end },
|
||||
{ "-{", gg.future(M, 'meta').splice_content, "}", builder = unpack },
|
||||
{ "if", gg.nonempty(elseifs_parser), gg.onkeyword{ "else", M.block }, "end",
|
||||
builder = if_builder },
|
||||
default = assign_or_call_stat_parser }
|
||||
|
||||
M.assignments = {
|
||||
["="] = "Set"
|
||||
}
|
||||
|
||||
function M.assignments:add(k, v) self[k] = v end
|
||||
|
||||
return M
|
||||
end
|
|
@ -1,77 +0,0 @@
|
|||
--------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
--
|
||||
-- Exported API:
|
||||
-- * [M.table_bracket_field()]
|
||||
-- * [M.table_field()]
|
||||
-- * [M.table_content()]
|
||||
-- * [M.table()]
|
||||
--
|
||||
-- KNOWN BUG: doesn't handle final ";" or "," before final "}"
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local gg = require 'metalua.grammar.generator'
|
||||
|
||||
return function(M)
|
||||
|
||||
M.table = { }
|
||||
local _table = gg.future(M.table)
|
||||
local _expr = gg.future(M).expr
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- `[key] = value` table field definition
|
||||
--------------------------------------------------------------------------------
|
||||
M.table.bracket_pair = gg.sequence{ "[", _expr, "]", "=", _expr, builder = "Pair" }
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- table element parser: list value, `id = value` pair or `[value] = value` pair.
|
||||
--------------------------------------------------------------------------------
|
||||
function M.table.element (lx)
|
||||
if lx :is_keyword (lx :peek(), "[") then return M.table.bracket_pair(lx) end
|
||||
local e = M.expr (lx)
|
||||
if not lx :is_keyword (lx :peek(), "=") then return e end
|
||||
lx :next(); -- skip the "="
|
||||
local key = M.id2string(e) -- will fail on non-identifiers
|
||||
local val = M.expr(lx)
|
||||
local r = { tag="Pair", key, val }
|
||||
r.lineinfo = { first = key.lineinfo.first, last = val.lineinfo.last }
|
||||
return r
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- table constructor, without enclosing braces; returns a full table object
|
||||
-----------------------------------------------------------------------------
|
||||
M.table.content = gg.list {
|
||||
-- eta expansion to allow patching the element definition
|
||||
primary = _table.element,
|
||||
separators = { ",", ";" },
|
||||
terminators = "}",
|
||||
builder = "Table" }
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- complete table constructor including [{...}]
|
||||
--------------------------------------------------------------------------------
|
||||
-- TODO beware, stat and expr use only table.content, this can't be patched.
|
||||
M.table.table = gg.sequence{ "{", _table.content, "}", builder = unpack }
|
||||
|
||||
return M
|
||||
end
|
|
@ -1,31 +0,0 @@
|
|||
-{ extension ('match', ...) }
|
||||
|
||||
local M = { }
|
||||
|
||||
M.register = { }
|
||||
|
||||
local function dollar_builder(e)
|
||||
match e with
|
||||
| `Call{ `Id{name}, ... } ->
|
||||
local entry = M.register[name] or error ("No macro "..name.." registered")
|
||||
return entry(select(2, unpack(e)))
|
||||
| `Id{name} ->
|
||||
local entry = dollar[name] or error ("No macro "..name.." registered")
|
||||
match type(entry) with
|
||||
| 'function' -> return entry()
|
||||
| 'table' -> return entry -- constant AST
|
||||
| t -> error ("Invalid macro type "..t)
|
||||
end
|
||||
| _ -> error "Invalid $macro, '$' must be followed by an identifier or function call"
|
||||
end
|
||||
end
|
||||
|
||||
function M.extend(M)
|
||||
local M = require 'metalua.grammar.generator' .future(M)
|
||||
M.expr.prefix :add {
|
||||
'$', prec = 100, builder = |_, x| dollar_builder(x) }
|
||||
M.stat:add{
|
||||
'$', _M.expr, builder = |x| dollar_builder(x[1]) }
|
||||
end
|
||||
|
||||
return M
|
|
@ -1,282 +0,0 @@
|
|||
-------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
--
|
||||
-- This extension implements list comprehensions, similar to Haskell and
|
||||
-- Python syntax, to easily describe lists.
|
||||
--
|
||||
-- * x[a ... b] is the list { x[a], x[a+1], ..., x[b] }
|
||||
-- * { f()..., b } contains all the elements returned by f(), then b
|
||||
-- (allows to expand list fields other than the last one)
|
||||
-- * list comprehensions a la python, with "for" and "if" suffixes:
|
||||
-- {i+10*j for i=1,3 for j=1,3 if i~=j} is { 21, 31, 12, 32, 13, 23 }
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
-{ extension ("match", ...) }
|
||||
|
||||
local SUPPORT_IMPROVED_LOOPS = true
|
||||
local SUPPORT_IMPROVED_INDEXES = false -- depends on deprecated table.isub
|
||||
local SUPPORT_CONTINUE = true
|
||||
local SUPPORT_COMP_LISTS = true
|
||||
|
||||
assert (SUPPORT_IMPROVED_LOOPS or not SUPPORT_CONTINUE,
|
||||
"Can't support 'continue' without improved loop headers")
|
||||
|
||||
local gg = require 'metalua.grammar.generator'
|
||||
local Q = require 'metalua.treequery'
|
||||
|
||||
local function dots_list_suffix_builder (x) return `DotsSuffix{ x } end
|
||||
|
||||
local function for_list_suffix_builder (list_element, suffix)
|
||||
local new_header = suffix[1]
|
||||
match list_element with
|
||||
| `Comp{ _, acc } -> table.insert (acc, new_header); return list_element
|
||||
| _ -> return `Comp{ list_element, { new_header } }
|
||||
end
|
||||
end
|
||||
|
||||
local function if_list_suffix_builder (list_element, suffix)
|
||||
local new_header = `If{ suffix[1] }
|
||||
match list_element with
|
||||
| `Comp{ _, acc } -> table.insert (acc, new_header); return list_element
|
||||
| _ -> return `Comp{ list_element, { new_header } }
|
||||
end
|
||||
end
|
||||
|
||||
-- Builds a statement from a table element, which adds this element to
|
||||
-- a table `t`, potentially thanks to an alias `tinsert` to
|
||||
-- `table.insert`.
|
||||
-- @param core the part around which the loops are built.
|
||||
-- either `DotsSuffix{expr}, `Pair{ expr } or a plain expression
|
||||
-- @param list comprehension suffixes, in the order in which they appear
|
||||
-- either `Forin{ ... } or `Fornum{ ...} or `If{ ... }. In each case,
|
||||
-- it misses a last child node as its body.
|
||||
-- @param t a variable containing the table to fill
|
||||
-- @param tinsert a variable containing `table.insert`.
|
||||
--
|
||||
-- @return fill a statement which fills empty table `t` with the denoted element
|
||||
local function comp_list_builder(core, list, t, tinsert)
|
||||
local filler
|
||||
-- 1 - Build the loop's core: if it has suffix "...", every elements of the
|
||||
-- multi-return must be inserted, hence the extra [for] loop.
|
||||
match core with
|
||||
| `DotsSuffix{ element } ->
|
||||
local x = gg.gensym()
|
||||
filler = +{stat: for _, -{x} in pairs{ -{element} } do (-{tinsert})(-{t}, -{x}) end }
|
||||
| `Pair{ key, value } ->
|
||||
--filler = +{ -{t}[-{key}] = -{value} }
|
||||
filler = `Set{ { `Index{ t, key } }, { value } }
|
||||
| _ -> filler = +{ (-{tinsert})(-{t}, -{core}) }
|
||||
end
|
||||
|
||||
-- 2 - Stack the `if` and `for` control structures, from outside to inside.
|
||||
-- This is done in a destructive way for the elements of [list].
|
||||
for i = #list, 1, -1 do
|
||||
table.insert (list[i], {filler})
|
||||
filler = list[i]
|
||||
end
|
||||
|
||||
return filler
|
||||
end
|
||||
|
||||
local function table_content_builder (list)
|
||||
local special = false -- Does the table need a special builder?
|
||||
for _, element in ipairs(list) do
|
||||
local etag = element.tag
|
||||
if etag=='Comp' or etag=='DotsSuffix' then special=true; break end
|
||||
end
|
||||
if not special then list.tag='Table'; return list end
|
||||
|
||||
local t, tinsert = gg.gensym 'table', gg.gensym 'table_insert'
|
||||
local filler_block = { +{stat: local -{t}, -{tinsert} = { }, table.insert } }
|
||||
for _, element in ipairs(list) do
|
||||
local filler
|
||||
match element with
|
||||
| `Comp{ core, comp } -> filler = comp_list_builder(core, comp, t, tinsert)
|
||||
| _ -> filler = comp_list_builder(element, { }, t, tinsert)
|
||||
end
|
||||
table.insert(filler_block, filler)
|
||||
end
|
||||
return `Stat{ filler_block, t }
|
||||
end
|
||||
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Back-end for improved index operator.
|
||||
local function index_builder(a, suffix)
|
||||
match suffix[1] with
|
||||
-- Single index, no range: keep the native semantics
|
||||
| { { e, false } } -> return `Index{ a, e }
|
||||
-- Either a range, or multiple indexes, or both
|
||||
| ranges ->
|
||||
local r = `Call{ +{table.isub}, a }
|
||||
local function acc (x,y) table.insert (r,x); table.insert (r,y) end
|
||||
for _, seq in ipairs (ranges) do
|
||||
match seq with
|
||||
| { e, false } -> acc(e,e)
|
||||
| { e, f } -> acc(e,f)
|
||||
end
|
||||
end
|
||||
return r
|
||||
end
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Find continue statements in a loop body, change them into goto
|
||||
-- end-of-body.
|
||||
local function transform_continue_statements(body)
|
||||
local continue_statements = Q(body)
|
||||
:if_unknown() -- tolerate unknown 'Continue' statements
|
||||
:not_under ('Forin', 'Fornum', 'While', 'Repeat')
|
||||
:filter ('Continue')
|
||||
:list()
|
||||
if next(continue_statements) then
|
||||
local continue_label = gg.gensym 'continue' [1]
|
||||
table.insert(body, `Label{ continue_label })
|
||||
for _, statement in ipairs(continue_statements) do
|
||||
statement.tag = 'Goto'
|
||||
statement[1] = continue_label
|
||||
end
|
||||
return true
|
||||
else return false end
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------------------
|
||||
-- Back-end for loops with a multi-element header
|
||||
local function loop_builder(x)
|
||||
local first, elements, body = unpack(x)
|
||||
|
||||
-- Change continue statements into gotos.
|
||||
if SUPPORT_CONTINUE then transform_continue_statements(body) end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- If it's a regular loop, don't bloat the code
|
||||
if not next(elements) then
|
||||
table.insert(first, body)
|
||||
return first
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- There's no reason to treat the first element in a special way
|
||||
table.insert(elements, 1, first)
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Change breaks into gotos that escape all loops at once.
|
||||
local exit_label = nil
|
||||
local function break_to_goto(break_node)
|
||||
if not exit_label then exit_label = gg.gensym 'break' [1] end
|
||||
break_node = break_node or { }
|
||||
break_node.tag = 'Goto'
|
||||
break_node[1] = exit_label
|
||||
return break_node
|
||||
end
|
||||
Q(body)
|
||||
:not_under('Function', 'Forin', 'Fornum', 'While', 'Repeat')
|
||||
:filter('Break')
|
||||
:foreach (break_to_goto)
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Compile all headers elements, from last to first.
|
||||
-- invariant: `body` is a block (not a statement)
|
||||
local result = body
|
||||
for i = #elements, 1, -1 do
|
||||
local e = elements[i]
|
||||
match e with
|
||||
| `If{ cond } ->
|
||||
result = { `If{ cond, result } }
|
||||
| `Until{ cond } ->
|
||||
result = +{block: if -{cond} then -{break_to_goto()} else -{result} end }
|
||||
| `While{ cond } ->
|
||||
if i==1 then result = { `While{ cond, result } } -- top-level while
|
||||
else result = +{block: if -{cond} then -{result} else -{break_to_goto()} end } end
|
||||
| `Forin{ ... } | `Fornum{ ... } ->
|
||||
table.insert (e, result); result={e}
|
||||
| _-> require'metalua.pprint'.printf("Bad loop header element %s", e)
|
||||
end
|
||||
end
|
||||
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- If some breaks had to be changed into gotos, insert the label
|
||||
if exit_label then result = { result, `Label{ exit_label } } end
|
||||
|
||||
return result
|
||||
end
|
||||
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- Improved "[...]" index operator:
|
||||
-- * support for multi-indexes ("foo[bar, gnat]")
|
||||
-- * support for ranges ("foo[bar ... gnat]")
|
||||
--------------------------------------------------------------------------------
|
||||
local function extend(M)
|
||||
|
||||
local _M = gg.future(M)
|
||||
|
||||
if SUPPORT_COMP_LISTS then
|
||||
-- support for "for" / "if" comprehension suffixes in literal tables
|
||||
local original_table_element = M.table.element
|
||||
M.table.element = gg.expr{ name="table cell",
|
||||
primary = original_table_element,
|
||||
suffix = { name="table cell suffix",
|
||||
{ "...", builder = dots_list_suffix_builder },
|
||||
{ "for", _M.for_header, builder = for_list_suffix_builder },
|
||||
{ "if", _M.expr, builder = if_list_suffix_builder } } }
|
||||
M.table.content.builder = table_content_builder
|
||||
end
|
||||
|
||||
if SUPPORT_IMPROVED_INDEXES then
|
||||
-- Support for ranges and multiple indices in bracket suffixes
|
||||
M.expr.suffix:del '['
|
||||
M.expr.suffix:add{ name="table index/range",
|
||||
"[", gg.list{
|
||||
gg.sequence { _M.expr, gg.onkeyword{ "...", _M.expr } } ,
|
||||
separators = { ",", ";" } },
|
||||
"]", builder = index_builder }
|
||||
end
|
||||
|
||||
if SUPPORT_IMPROVED_LOOPS then
|
||||
local original_for_header = M.for_header
|
||||
M.stat :del 'for'
|
||||
M.stat :del 'while'
|
||||
|
||||
M.loop_suffix = gg.multisequence{
|
||||
{ 'while', _M.expr, builder = |x| `Until{ `Op{ 'not', x[1] } } },
|
||||
{ 'until', _M.expr, builder = |x| `Until{ x[1] } },
|
||||
{ 'if', _M.expr, builder = |x| `If{ x[1] } },
|
||||
{ 'for', original_for_header, builder = |x| x[1] } }
|
||||
|
||||
M.loop_suffix_list = gg.list{ _M.loop_suffix, terminators='do' }
|
||||
|
||||
M.stat :add{
|
||||
'for', original_for_header, _M.loop_suffix_list, 'do', _M.block, 'end',
|
||||
builder = loop_builder }
|
||||
|
||||
M.stat :add{
|
||||
'while', _M.expr, _M.loop_suffix_list, 'do', _M.block, 'end',
|
||||
builder = |x| loop_builder{ `While{x[1]}, x[2], x[3] } }
|
||||
end
|
||||
|
||||
if SUPPORT_CONTINUE then
|
||||
M.lexer :add 'continue'
|
||||
M.stat :add{ 'continue', builder='Continue' }
|
||||
end
|
||||
end
|
||||
|
||||
return extend
|
|
@ -1,51 +0,0 @@
|
|||
-- -{ extension("comprehension", ...) }
|
||||
-{ extension("match", ...) }
|
||||
|
||||
local bit = require 'bit'
|
||||
local gg = require 'metalua.grammar.generator'
|
||||
|
||||
--local M = {}
|
||||
--M.program = {}
|
||||
|
||||
local function extend(M)
|
||||
local _M = gg.future(M)
|
||||
|
||||
local function op_assign(kw, op)
|
||||
local function f(a, b)
|
||||
if #a ~= #b then gg.parse_error "assymetric operator+assignment" end
|
||||
--local right = { }
|
||||
local right = +{ bit[op](-{a}, -{b}) }
|
||||
print(right)
|
||||
|
||||
--for i=1,#a do right[i] = +{ bit[op](-{a[i]},-{b[i]}) } end
|
||||
--for i=1,#a do right[i] = `Call{`Index{bit, `Id{op}}, a[i], b[i]} end
|
||||
--for i=1, #a do right[i] = { tag="Op", op, a[i], b[i] } end
|
||||
return { tag="Set", a, right }
|
||||
end
|
||||
M.lexer:add(kw)
|
||||
M.assignments[kw] = f
|
||||
end
|
||||
local ops = {
|
||||
lshift='<<=',
|
||||
rshift='>>='
|
||||
}
|
||||
for ast_op_name, keyword in pairs(ops) do op_assign(keyword, ast_op_name) end
|
||||
|
||||
M.lexer:add{ '//', '<<<', '>>>', '<<', '>>' }
|
||||
M.expr.infix:add{ '//', prec=70, builder = |a,_,b| +{ bit.idiv(-{a}, -{b}) }}
|
||||
M.expr.infix:add{ '<<', prec=34, builder = |a,_,b| +{ bit.lshift(-{a}, -{b}) }}
|
||||
M.expr.infix:add{ '>>', prec=34, builder = |a,_,b| +{ bit.rshift(-{a}, -{b}) }}
|
||||
M.expr.infix:add{ '<<<', prec=34, builder = |a,_,b| +{ bit.rol(-{a}, -{b}) }}
|
||||
M.expr.infix:add{ '>>>', prec=34, builder = |a,_,b| +{ bit.ror(-{a}, -{b}) }}
|
||||
M.expr.infix:add{ '&', prec=33, builder = |a,_,b| +{ bit.band(-{a}, -{b}) }}
|
||||
M.expr.infix:add{ '~', prec=32, builder = |a,_,b| +{ bit.bxor(-{a}, -{b}) }}
|
||||
M.expr.infix:add{ '|', prec=31, builder = |a,_,b| +{ bit.bor(-{a}, -{b}) }}
|
||||
M.expr.prefix:add{ '~', prec=80, builder = |_,b| +{ bit.bnot(-{b}) }}
|
||||
|
||||
M.lexer:add{ 'c', '\\' }
|
||||
M.stat:add{ "\\", builder = |x| +{ print("nop") } }
|
||||
M.stat:add{ "\\", M.expr, builder = |x| +{ print("nop*" .. -{x[1]}) } }
|
||||
M.stat:add{ "c", '+', builder = |x| +{ print("sec") } }
|
||||
end
|
||||
|
||||
return extend
|
|
@ -1,400 +0,0 @@
|
|||
-------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
-------------------------------------------------------------------------------
|
||||
--
|
||||
-- Glossary:
|
||||
--
|
||||
-- * term_seq: the tested stuff, a sequence of terms
|
||||
-- * pattern_element: might match one term of a term seq. Represented
|
||||
-- as expression ASTs.
|
||||
-- * pattern_seq: might match a term_seq
|
||||
-- * pattern_group: several pattern seqs, one of them might match
|
||||
-- the term seq.
|
||||
-- * case: pattern_group * guard option * block
|
||||
-- * match_statement: tested term_seq * case list
|
||||
--
|
||||
-- Hence a complete match statement is a:
|
||||
--
|
||||
-- { list(expr), list{ list(list(expr)), expr or false, block } }
|
||||
--
|
||||
-- Implementation hints
|
||||
-- ====================
|
||||
--
|
||||
-- The implementation is made as modular as possible, so that parts
|
||||
-- can be reused in other extensions. The priviledged way to share
|
||||
-- contextual information across functions is through the 'cfg' table
|
||||
-- argument. Its fields include:
|
||||
--
|
||||
-- * code: code generated from pattern. A pattern_(element|seq|group)
|
||||
-- is compiled as a sequence of instructions which will jump to
|
||||
-- label [cfg.on_failure] if the tested term doesn't match.
|
||||
--
|
||||
-- * on_failure: name of the label where the code will jump if the
|
||||
-- pattern doesn't match
|
||||
--
|
||||
-- * locals: names of local variables used by the pattern. This
|
||||
-- includes bound variables, and temporary variables used to
|
||||
-- destructure tables. Names are stored as keys of the table,
|
||||
-- values are meaningless.
|
||||
--
|
||||
-- * after_success: label where the code must jump after a pattern
|
||||
-- succeeded to capture a term, and the guard suceeded if there is
|
||||
-- any, and the conditional block has run.
|
||||
--
|
||||
-- * ntmp: number of temporary variables used to destructurate table
|
||||
-- in the current case.
|
||||
--
|
||||
-- Code generation is performed by acc_xxx() functions, which accumulate
|
||||
-- code in cfg.code:
|
||||
--
|
||||
-- * acc_test(test, cfg) will generate a jump to cfg.on_failure
|
||||
-- *when the test returns TRUE*
|
||||
--
|
||||
-- * acc_stat accumulates a statement
|
||||
--
|
||||
-- * acc_assign accumulate an assignment statement, and makes sure that
|
||||
-- the LHS variable the registered as local in cfg.locals.
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
-- TODO: hygiene wrt type()
|
||||
-- TODO: cfg.ntmp isn't reset as often as it could. I'm not even sure
|
||||
-- the corresponding locals are declared.
|
||||
|
||||
|
||||
local gg = require 'metalua.grammar.generator'
|
||||
local pp = require 'metalua.pprint'
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- This would have been best done through library 'metalua.walk',
|
||||
-- but walk depends on match, so we have to break the dependency.
|
||||
-- It replaces all instances of `...' in `ast' with `term', unless
|
||||
-- it appears in a function.
|
||||
----------------------------------------------------------------------
|
||||
local function replace_dots (ast, term)
|
||||
local function rec (node)
|
||||
for i, child in ipairs(node) do
|
||||
if type(child)~="table" then -- pass
|
||||
elseif child.tag=='Dots' then
|
||||
if term=='ambiguous' then
|
||||
error ("You can't use `...' on the right of a match case when it appears "..
|
||||
"more than once on the left")
|
||||
else node[i] = term end
|
||||
elseif child.tag=='Function' then return nil
|
||||
else rec(child) end
|
||||
end
|
||||
end
|
||||
return rec(ast)
|
||||
end
|
||||
|
||||
local tmpvar_base = gg.gensym 'submatch.' [1]
|
||||
|
||||
local function next_tmpvar(cfg)
|
||||
assert (cfg.ntmp, "No cfg.ntmp imbrication level in the match compiler")
|
||||
cfg.ntmp = cfg.ntmp+1
|
||||
return `Id{ tmpvar_base .. cfg.ntmp }
|
||||
end
|
||||
|
||||
-- Code accumulators
|
||||
local acc_stat = |x,cfg| table.insert (cfg.code, x)
|
||||
local acc_test = |x,cfg| acc_stat(+{stat: if -{x} then -{`Goto{cfg.on_failure}} end}, cfg)
|
||||
-- lhs :: `Id{ string }
|
||||
-- rhs :: expr
|
||||
local function acc_assign (lhs, rhs, cfg)
|
||||
assert(lhs.tag=='Id')
|
||||
cfg.locals[lhs[1]] = true
|
||||
acc_stat (`Set{ {lhs}, {rhs} }, cfg)
|
||||
end
|
||||
|
||||
local literal_tags = { String=1, Number=1, True=1, False=1, Nil=1 }
|
||||
|
||||
-- pattern :: `Id{ string }
|
||||
-- term :: expr
|
||||
local function id_pattern_element_builder (pattern, term, cfg)
|
||||
assert (pattern.tag == "Id")
|
||||
if pattern[1] == "_" then
|
||||
-- "_" is used as a dummy var ==> no assignment, no == checking
|
||||
cfg.locals._ = true
|
||||
elseif cfg.locals[pattern[1]] then
|
||||
-- This var is already bound ==> test for equality
|
||||
acc_test (+{ -{term} ~= -{pattern} }, cfg)
|
||||
else
|
||||
-- Free var ==> bind it, and remember it for latter linearity checking
|
||||
acc_assign (pattern, term, cfg)
|
||||
cfg.locals[pattern[1]] = true
|
||||
end
|
||||
end
|
||||
|
||||
-- mutually recursive with table_pattern_element_builder
|
||||
local pattern_element_builder
|
||||
|
||||
-- pattern :: pattern and `Table{ }
|
||||
-- term :: expr
|
||||
local function table_pattern_element_builder (pattern, term, cfg)
|
||||
local seen_dots, len = false, 0
|
||||
acc_test (+{ type( -{term} ) ~= "table" }, cfg)
|
||||
for i = 1, #pattern do
|
||||
local key, sub_pattern
|
||||
if pattern[i].tag=="Pair" then -- Explicit key/value pair
|
||||
key, sub_pattern = unpack (pattern[i])
|
||||
assert (literal_tags[key.tag], "Invalid key")
|
||||
else -- Implicit key
|
||||
len, key, sub_pattern = len+1, `Number{ len+1 }, pattern[i]
|
||||
end
|
||||
|
||||
-- '...' can only appear in final position
|
||||
-- Could be fixed actually...
|
||||
assert (not seen_dots, "Wrongly placed `...' ")
|
||||
|
||||
if sub_pattern.tag == "Id" then
|
||||
-- Optimization: save a useless [ v(n+1)=v(n).key ]
|
||||
id_pattern_element_builder (sub_pattern, `Index{ term, key }, cfg)
|
||||
if sub_pattern[1] ~= "_" then
|
||||
acc_test (+{ -{sub_pattern} == nil }, cfg)
|
||||
end
|
||||
elseif sub_pattern.tag == "Dots" then
|
||||
-- Remember where the capture is, and thatt arity checking shouldn't occur
|
||||
seen_dots = true
|
||||
else
|
||||
-- Business as usual:
|
||||
local v2 = next_tmpvar(cfg)
|
||||
acc_assign (v2, `Index{ term, key }, cfg)
|
||||
pattern_element_builder (sub_pattern, v2, cfg)
|
||||
-- TODO: restore ntmp?
|
||||
end
|
||||
end
|
||||
if seen_dots then -- remember how to retrieve `...'
|
||||
-- FIXME: check, but there might be cases where the variable -{term}
|
||||
-- will be overridden in contrieved tables.
|
||||
-- ==> save it now, and clean the setting statement if unused
|
||||
if cfg.dots_replacement then cfg.dots_replacement = 'ambiguous'
|
||||
else cfg.dots_replacement = +{ select (-{`Number{len}}, unpack(-{term})) } end
|
||||
else -- Check arity
|
||||
acc_test (+{ #-{term} ~= -{`Number{len}} }, cfg)
|
||||
end
|
||||
end
|
||||
|
||||
-- mutually recursive with pattern_element_builder
|
||||
local eq_pattern_element_builder, regexp_pattern_element_builder
|
||||
|
||||
-- Concatenate code in [cfg.code], that will jump to label
|
||||
-- [cfg.on_failure] if [pattern] doesn't match [term]. [pattern]
|
||||
-- should be an identifier, or at least cheap to compute and
|
||||
-- side-effects free.
|
||||
--
|
||||
-- pattern :: pattern_element
|
||||
-- term :: expr
|
||||
function pattern_element_builder (pattern, term, cfg)
|
||||
if literal_tags[pattern.tag] then
|
||||
acc_test (+{ -{term} ~= -{pattern} }, cfg)
|
||||
elseif "Id" == pattern.tag then
|
||||
id_pattern_element_builder (pattern, term, cfg)
|
||||
elseif "Op" == pattern.tag and "div" == pattern[1] then
|
||||
regexp_pattern_element_builder (pattern, term, cfg)
|
||||
elseif "Op" == pattern.tag and "eq" == pattern[1] then
|
||||
eq_pattern_element_builder (pattern, term, cfg)
|
||||
elseif "Table" == pattern.tag then
|
||||
table_pattern_element_builder (pattern, term, cfg)
|
||||
else
|
||||
error ("Invalid pattern at "..
|
||||
tostring(pattern.lineinfo)..
|
||||
": "..pp.tostring(pattern, {hide_hash=true}))
|
||||
end
|
||||
end
|
||||
|
||||
function eq_pattern_element_builder (pattern, term, cfg)
|
||||
local _, pat1, pat2 = unpack (pattern)
|
||||
local ntmp_save = cfg.ntmp
|
||||
pattern_element_builder (pat1, term, cfg)
|
||||
cfg.ntmp = ntmp_save
|
||||
pattern_element_builder (pat2, term, cfg)
|
||||
end
|
||||
|
||||
-- pattern :: `Op{ 'div', string, list{`Id string} or `Id{ string }}
|
||||
-- term :: expr
|
||||
local function regexp_pattern_element_builder (pattern, term, cfg)
|
||||
local op, regexp, sub_pattern = unpack(pattern)
|
||||
|
||||
-- Sanity checks --
|
||||
assert (op=='div', "Don't know what to do with that op in a pattern")
|
||||
assert (regexp.tag=="String",
|
||||
"Left hand side operand for '/' in a pattern must be "..
|
||||
"a literal string representing a regular expression")
|
||||
if sub_pattern.tag=="Table" then
|
||||
for _, x in ipairs(sub_pattern) do
|
||||
assert (x.tag=="Id" or x.tag=='Dots',
|
||||
"Right hand side operand for '/' in a pattern must be "..
|
||||
"a list of identifiers")
|
||||
end
|
||||
else
|
||||
assert (sub_pattern.tag=="Id",
|
||||
"Right hand side operand for '/' in a pattern must be "..
|
||||
"an identifier or a list of identifiers")
|
||||
end
|
||||
|
||||
-- Regexp patterns can only match strings
|
||||
acc_test (+{ type(-{term}) ~= 'string' }, cfg)
|
||||
-- put all captures in a list
|
||||
local capt_list = +{ { string.strmatch(-{term}, -{regexp}) } }
|
||||
-- save them in a var_n for recursive decomposition
|
||||
local v2 = next_tmpvar(cfg)
|
||||
acc_stat (+{stat: local -{v2} = -{capt_list} }, cfg)
|
||||
-- was capture successful?
|
||||
acc_test (+{ not next (-{v2}) }, cfg)
|
||||
pattern_element_builder (sub_pattern, v2, cfg)
|
||||
end
|
||||
|
||||
|
||||
-- Jumps to [cfg.on_faliure] if pattern_seq doesn't match
|
||||
-- term_seq.
|
||||
local function pattern_seq_builder (pattern_seq, term_seq, cfg)
|
||||
if #pattern_seq ~= #term_seq then error ("Bad seq arity") end
|
||||
cfg.locals = { } -- reset bound variables between alternatives
|
||||
for i=1, #pattern_seq do
|
||||
cfg.ntmp = 1 -- reset the tmp var generator
|
||||
pattern_element_builder(pattern_seq[i], term_seq[i], cfg)
|
||||
end
|
||||
end
|
||||
|
||||
--------------------------------------------------
|
||||
-- for each case i:
|
||||
-- pattern_seq_builder_i:
|
||||
-- * on failure, go to on_failure_i
|
||||
-- * on success, go to on_success
|
||||
-- label on_success:
|
||||
-- block
|
||||
-- goto after_success
|
||||
-- label on_failure_i
|
||||
--------------------------------------------------
|
||||
local function case_builder (case, term_seq, cfg)
|
||||
local patterns_group, guard, block = unpack(case)
|
||||
local on_success = gg.gensym 'on_success' [1]
|
||||
for i = 1, #patterns_group do
|
||||
local pattern_seq = patterns_group[i]
|
||||
cfg.on_failure = gg.gensym 'match_fail' [1]
|
||||
cfg.dots_replacement = false
|
||||
pattern_seq_builder (pattern_seq, term_seq, cfg)
|
||||
if i<#patterns_group then
|
||||
acc_stat (`Goto{on_success}, cfg)
|
||||
acc_stat (`Label{cfg.on_failure}, cfg)
|
||||
end
|
||||
end
|
||||
acc_stat (`Label{on_success}, cfg)
|
||||
if guard then acc_test (+{not -{guard}}, cfg) end
|
||||
if cfg.dots_replacement then
|
||||
replace_dots (block, cfg.dots_replacement)
|
||||
end
|
||||
block.tag = 'Do'
|
||||
acc_stat (block, cfg)
|
||||
acc_stat (`Goto{cfg.after_success}, cfg)
|
||||
acc_stat (`Label{cfg.on_failure}, cfg)
|
||||
end
|
||||
|
||||
local function match_builder (x)
|
||||
local term_seq, cases = unpack(x)
|
||||
local cfg = {
|
||||
code = `Do{ },
|
||||
after_success = gg.gensym "_after_success" }
|
||||
|
||||
|
||||
-- Some sharing issues occur when modifying term_seq,
|
||||
-- so it's replaced by a copy new_term_seq.
|
||||
-- TODO: clean that up, and re-suppress the useless copies
|
||||
-- (cf. remarks about capture bug below).
|
||||
local new_term_seq = { }
|
||||
|
||||
local match_locals
|
||||
|
||||
-- Make sure that all tested terms are variables or literals
|
||||
for i=1, #term_seq do
|
||||
local t = term_seq[i]
|
||||
-- Capture problem: the following would compile wrongly:
|
||||
-- `match x with x -> end'
|
||||
-- Temporary workaround: suppress the condition, so that
|
||||
-- all external variables are copied into unique names.
|
||||
--if t.tag ~= 'Id' and not literal_tags[t.tag] then
|
||||
local v = gg.gensym 'v'
|
||||
if not match_locals then match_locals = `Local{ {v}, {t} } else
|
||||
table.insert(match_locals[1], v)
|
||||
table.insert(match_locals[2], t)
|
||||
end
|
||||
new_term_seq[i] = v
|
||||
--end
|
||||
end
|
||||
term_seq = new_term_seq
|
||||
|
||||
if match_locals then acc_stat(match_locals, cfg) end
|
||||
|
||||
for i=1, #cases do
|
||||
local case_cfg = {
|
||||
after_success = cfg.after_success,
|
||||
code = `Do{ }
|
||||
-- locals = { } -- unnecessary, done by pattern_seq_builder
|
||||
}
|
||||
case_builder (cases[i], term_seq, case_cfg)
|
||||
if next (case_cfg.locals) then
|
||||
local case_locals = { }
|
||||
table.insert (case_cfg.code, 1, `Local{ case_locals, { } })
|
||||
for v, _ in pairs (case_cfg.locals) do
|
||||
table.insert (case_locals, `Id{ v })
|
||||
end
|
||||
end
|
||||
acc_stat(case_cfg.code, cfg)
|
||||
end
|
||||
local li = `String{tostring(cases.lineinfo)}
|
||||
acc_stat(+{error('mismatch at '..-{li})}, cfg)
|
||||
acc_stat(`Label{cfg.after_success}, cfg)
|
||||
return cfg.code
|
||||
end
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- Syntactical front-end
|
||||
----------------------------------------------------------------------
|
||||
|
||||
local function extend(M)
|
||||
|
||||
local _M = gg.future(M)
|
||||
|
||||
checks('metalua.compiler.parser')
|
||||
M.lexer:add{ "match", "with", "->" }
|
||||
M.block.terminators:add "|"
|
||||
|
||||
local match_cases_list_parser = gg.list{ name = "match cases list",
|
||||
gg.sequence{ name = "match case",
|
||||
gg.list{ name = "match case patterns list",
|
||||
primary = _M.expr_list,
|
||||
separators = "|",
|
||||
terminators = { "->", "if" } },
|
||||
gg.onkeyword{ "if", _M.expr, consume = true },
|
||||
"->",
|
||||
_M.block },
|
||||
separators = "|",
|
||||
terminators = "end" }
|
||||
|
||||
M.stat:add{ name = "match statement",
|
||||
"match",
|
||||
_M.expr_list,
|
||||
"with", gg.optkeyword "|",
|
||||
match_cases_list_parser,
|
||||
"end",
|
||||
builder = |x| match_builder{ x[1], x[3] } }
|
||||
end
|
||||
|
||||
return extend
|
|
@ -1,232 +0,0 @@
|
|||
-------------------------------------------------------------------------------
|
||||
-- Copyright (c) 2006-2013 Fabien Fleutot and others.
|
||||
--
|
||||
-- All rights reserved.
|
||||
--
|
||||
-- This program and the accompanying materials are made available
|
||||
-- under the terms of the Eclipse Public License v1.0 which
|
||||
-- accompanies this distribution, and is available at
|
||||
-- http://www.eclipse.org/legal/epl-v10.html
|
||||
--
|
||||
-- This program and the accompanying materials are also made available
|
||||
-- under the terms of the MIT public license which accompanies this
|
||||
-- distribution, and is available at http://www.lua.org/license.html
|
||||
--
|
||||
-- Contributors:
|
||||
-- Fabien Fleutot - API and implementation
|
||||
--
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
require 'metalua.extension.match'
|
||||
|
||||
module ('spmatch', package.seeall)
|
||||
|
||||
require 'metalua.walk.id'
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- Back-end for statements
|
||||
-- "match function ..." and "local match function...".
|
||||
-- Tag must be either "Localrec" or "Set".
|
||||
----------------------------------------------------------------------
|
||||
named_match_function_builder = |tag| function (x)
|
||||
local func_name, _, cases = unpack(x)
|
||||
local arity = #cases[1][1][1]
|
||||
if arity==0 then
|
||||
error "There must be at least 1 case in match function"
|
||||
end
|
||||
local args = { }
|
||||
for i=1, arity do args[i] = mlp.gensym("arg."..i) end
|
||||
local body = match_builder{args, cases}
|
||||
return { tag=tag, {func_name}, { `Function{ args, {body} } } }
|
||||
end
|
||||
|
||||
-- Get rid of the former parser, it will be blended in a multiseq:
|
||||
mlp.stat:del 'match'
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- "match function", "match ... with"
|
||||
----------------------------------------------------------------------
|
||||
mlp.stat:add{ 'match',
|
||||
gg.multisequence{
|
||||
|
||||
----------------------------------------------------------------
|
||||
-- Shortcut for declaration of functions containing only a match:
|
||||
-- "function f($1) match $1 with $2 end end" can be written:
|
||||
-- "match function f $2 end"
|
||||
----------------------------------------------------------------
|
||||
{ 'function', mlp.expr, gg.optkeyword '|',
|
||||
match_cases_list_parser, 'end',
|
||||
builder = named_match_function_builder 'Set' },
|
||||
|
||||
----------------------------------------------------------------
|
||||
-- Reintroduce the original match statement:
|
||||
----------------------------------------------------------------
|
||||
default = gg.sequence{
|
||||
mlp.expr_list, 'with', gg.optkeyword '|',
|
||||
match_cases_list_parser, 'end',
|
||||
builder = |x| match_builder{ x[1], x[3] } } } }
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- Shortcut: "local match function f $cases end" translates to:
|
||||
-- "local function f($args) match $args with $cases end end"
|
||||
----------------------------------------------------------------------
|
||||
mlp.stat:get'local'[2]:add{
|
||||
'match', 'function', mlp.expr, gg.optkeyword '|',
|
||||
match_cases_list_parser, 'end',
|
||||
builder = named_match_function_builder 'Localrec' }
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- "match...with" expressions and "match function..."
|
||||
----------------------------------------------------------------------
|
||||
mlp.expr:add{ 'match', builder = |x| x[1], gg.multisequence{
|
||||
|
||||
----------------------------------------------------------------
|
||||
-- Anonymous match functions:
|
||||
-- "function ($1) match $1 with $2 end end" can be written:
|
||||
-- "match function $2 end"
|
||||
----------------------------------------------------------------
|
||||
{ 'function', gg.optkeyword '|',
|
||||
match_cases_list_parser,
|
||||
'end',
|
||||
builder = function(x)
|
||||
local _, cases = unpack(x)
|
||||
local v = mlp.gensym()
|
||||
local body = match_builder{v, cases}
|
||||
return `Function{ {v}, {body} }
|
||||
end },
|
||||
|
||||
----------------------------------------------------------------
|
||||
-- match expressions: you can put a match where an expression
|
||||
-- is expected. The case bodies are then expected to be
|
||||
-- expressions, not blocks.
|
||||
----------------------------------------------------------------
|
||||
default = gg.sequence{
|
||||
mlp.expr_list, 'with', gg.optkeyword '|',
|
||||
gg.list{ name = "match cases list",
|
||||
gg.sequence{ name = "match expr case",
|
||||
gg.list{ name = "match expr case patterns list",
|
||||
primary = mlp.expr_list,
|
||||
separators = "|",
|
||||
terminators = { "->", "if" } },
|
||||
gg.onkeyword{ "if", mlp.expr, consume = true },
|
||||
"->",
|
||||
mlp.expr }, -- Notice: expression, not block!
|
||||
separators = "|" },
|
||||
-- Notice: no "end" keyword!
|
||||
builder = function (x)
|
||||
local tested_term_seq, _, cases = unpack(x)
|
||||
local v = mlp.gensym 'match_expr'
|
||||
-- Replace expressions with blocks
|
||||
for _, case in ipairs (cases) do
|
||||
local body = case[3]
|
||||
case[3] = { `Set{ {v}, {body} } }
|
||||
end
|
||||
local m = match_builder { tested_term_seq, cases }
|
||||
return `Stat{ { `Local{{v}}; m }, v }
|
||||
end } } }
|
||||
|
||||
function bind (x)
|
||||
local patterns, values = unpack(x)
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Generate pattern code: "bind vars = vals" translates to:
|
||||
-- do
|
||||
-- pattern matching code, goto 'fail' on mismatch
|
||||
-- goto 'success'
|
||||
-- label 'fail': error "..."
|
||||
-- label success
|
||||
-- end
|
||||
-- vars is the set of variables used by the pattern
|
||||
-------------------------------------------------------------------
|
||||
local code, vars do
|
||||
local match_cfg = {
|
||||
on_failure = mlp.gensym 'mismatch' [1],
|
||||
locals = { },
|
||||
code = { } }
|
||||
pattern_seq_builder(patterns, values, match_cfg)
|
||||
local on_success = mlp.gensym 'on_success' [1]
|
||||
code = {
|
||||
match_cfg.code;
|
||||
`Goto{ on_success };
|
||||
`Label{ match_cfg.on_failure };
|
||||
+{error "bind error"};
|
||||
`Label{ on_success } }
|
||||
vars = match_cfg.locals
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- variables that actually appear in the pattern:
|
||||
-------------------------------------------------------------------
|
||||
local vars_in_pattern do
|
||||
vars_in_pattern = { }
|
||||
local walk_cfg = { id = { } }
|
||||
function walk_cfg.id.free(v) vars_in_pattern[v[1]]=true end
|
||||
walk_id.expr_list(walk_cfg, patterns)
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- temp variables that are generated for destructuring,
|
||||
-- but aren't explicitly typed by the user. These must be made
|
||||
-- local.
|
||||
-------------------------------------------------------------------
|
||||
local vars_not_in_pattern do
|
||||
vars_not_in_pattern = { }
|
||||
for k, _ in pairs(vars) do
|
||||
if not vars_in_pattern[k] then
|
||||
vars_not_in_pattern[k] = true
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Declare the temp variables as local to the statement.
|
||||
-------------------------------------------------------------------
|
||||
if next(vars_not_in_pattern) then
|
||||
local loc = { }
|
||||
for k, _ in pairs(vars_not_in_pattern) do
|
||||
table.insert (loc, `Id{k})
|
||||
end
|
||||
table.insert (code, 1, `Local{ loc, { } })
|
||||
end
|
||||
|
||||
-------------------------------------------------------------------
|
||||
-- Transform the set of pattern variable names into a list of `Id{}
|
||||
-------------------------------------------------------------------
|
||||
local decl_list do
|
||||
decl_list = { }
|
||||
for k, _ in pairs(vars_in_pattern) do
|
||||
table.insert (decl_list, `Id{k})
|
||||
end
|
||||
end
|
||||
|
||||
return code, decl_list
|
||||
end
|
||||
|
||||
function local_bind(x)
|
||||
local code, vars = bind (x)
|
||||
return { `Local{ vars, { } }; code }
|
||||
end
|
||||
|
||||
function non_local_bind(x)
|
||||
local code, _ = bind (x)
|
||||
code.tag = 'Do'
|
||||
return code
|
||||
end
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- Syntax front-end
|
||||
----------------------------------------------------------------------
|
||||
mlp.lexer:add 'bind'
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- bind patterns = vars
|
||||
----------------------------------------------------------------------
|
||||
mlp.stat:add{ 'bind', mlp.expr_list, '=', mlp.expr_list,
|
||||
builder = non_local_bind }
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- local bind patterns = vars
|
||||
-- Some monkey-patching of "local ..." must take place
|
||||
----------------------------------------------------------------------
|
||||
mlp.stat:get'local'[2]:add{ 'bind', mlp.expr_list, '=', mlp.expr_list,
|
||||
builder = local_bind }
|
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Reference in New Issue