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754 lines
13 KiB
Plaintext
754 lines
13 KiB
Plaintext
;
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; File: InternalMacros.a
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;
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; Contains: generally useful macros
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;
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; Written by: Darin Adler
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;
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; Copyright: © 1989-1990, 1992 by Apple Computer, Inc., all rights reserved.
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;
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; Change History (most recent first):
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;
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; <2> 3/24/92 PN <kc> Fix bug in endPreviousWith (changed WithModule to
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; endWithModule).
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; <6> 1/30/91 gbm sab, #38: Change the ‘already including this file’ variable to
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; all uppercase (for security reasons)
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; <5> 9/25/90 KIP (really dba) DT.W now works on lists of items
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; <4> 6/8/90 dba change so that debug switch defaults to 0
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; <2> 4/17/90 dba change nil and false and true to defaults
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; <1.1> 11/14/89 dba fixed Symbol and added scott’s cool ideas from Finder to it
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; <1.0> 6/2/89 prp Initial release. Folder Manager now part of Alias Manager.
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; 6/2/89 dba rolled into system; fixed bug in linkFrame macro
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; 5/6/89 dba new today
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;
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; To Do:
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; optimize for non-68000 assemblies
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; keep a stack of saved register sets
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;
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IF &TYPE('__INCLUDINGINTERNALMACROS__') = 'UNDEFINED' THEN
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__INCLUDINGINTERNALMACROS__ SET 1
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; do an equ if the symbol is not already defined
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macro
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&symbol default &value
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if &type(&symbol) = 'UNDEFINED' then
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&symbol: equ &value
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endif
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endm
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; a few symbols
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nil: default 0
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false: default 0
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true: default 1
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DEBUG: default false
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; assert that a condition is true
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macro
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assert &condition
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if &eval(&condition) = false then
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aerror 'assert: failed'
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endif
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endm
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; end a record and declare a size field
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macro
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endrsize
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org
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size: equ *
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endr
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endm
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; push something onto the stack
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macro
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push.&size &operand
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move.&size &operand,-(sp)
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endm
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; pop something off of the stack
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macro
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pop.&size &operand
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move.&size (sp)+,&operand
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endm
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; reserve space on the stack
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macro
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rsrv.&size &number
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lcla &bytes
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lclc &sizeLetter
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; calculate the default size is 1
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if &number = '' then
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&bytes: seta 1
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else
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&bytes: seta &eval(&number)
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endif
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; the size letter is required
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&sizeLetter: setc &upCase(&size)
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if &sizeLetter = 'L' then
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&bytes: seta 4 * &bytes
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elseif &sizeLetter = 'W' then
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&bytes: seta 2 * &bytes
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elseif &sizeLetter = 'B' then
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&bytes: seta (&bytes + 1) and (~1) ; round up to a word, since this is the stack
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else
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aerror &concat('rsrv: bad size letter: ',&size)
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endif
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; assembler optimization does the rest
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if &bytes < 0 then
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aerror &concat('rsrv: negative byte count: ', &bytes)
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elseif &bytes and 1 then
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aerror &concat('rsrv: odd byte count: ', &bytes)
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else
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sub.l #&bytes,sp
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endif
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endm
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; free space from the stack
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macro
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free.&size &number
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lcla &bytes
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lclc &sizeLetter
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; calculate the default size is 1
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if &number = '' then
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&bytes: seta 1
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else
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&bytes: seta &eval(&number)
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endif
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; the size letter is required
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&sizeLetter: setc &upCase(&size)
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if &sizeLetter = 'L' then
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&bytes: seta 4 * &bytes
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elseif &sizeLetter = 'W' then
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&bytes: seta 2 * &bytes
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elseif &sizeLetter = 'B' then
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&bytes: seta (&bytes + 1) and (~1) ; round up to a word, since this is the stack
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else
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aerror &concat('free: bad size letter: ',&size)
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endif
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; assembler optimization does the rest
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if &bytes < 0 then
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aerror &concat('free: negative byte count: ', &bytes)
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elseif &bytes and 1 then
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aerror &concat('free: odd byte count: ', &bytes)
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else
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add.l #&bytes,sp
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endif
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endm
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; move condition codes
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macro
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moveccr &destination
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move.w sr,&destination
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endm
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; save some registers on the stack, possibly changing the condition codes
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macro
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save ®isters,&preserve==0
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gblc &savedRegisters
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gbla &port
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if &savedRegisters <> '' then
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aerror 'save: two without an intervening restore'
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endif
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&port: seta false
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if ®isters = '' then
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&savedRegisters: setc 'none'
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elseif &upCase(®isters) = 'THEPORT' then
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&savedRegisters: setc 'none'
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&port: seta true
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else
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if &upCase(&subStr(®isters, &len(®isters) - 7, 8)) = '/THEPORT' then
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&savedRegisters: setc &subStr(®isters, 1, &len(®isters) - 8)
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&port: seta 1
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else
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&savedRegisters: setc ®isters
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endif
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if &subStr(&type(&savedRegisters), 1, 5) = 'REG A' then
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move.l &savedRegisters,-(sp)
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elseif &subStr(&type(&savedRegisters), 1, 4) = 'REG ' then
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if &preserve then
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movem.l &savedRegisters,-(sp)
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else
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move.l &savedRegisters,-(sp)
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endif
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else
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movem.l &savedRegisters,-(sp)
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endif
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endif
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if &port then
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rsrv.l
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movem.l d0-d2/a0-a1,-(sp)
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if &preserve then
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moveccr -(sp)
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pea 2+5*4(sp)
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else
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pea 5*4(sp)
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endif
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_GetPort
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if &preserve then
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move.w (sp)+,ccr
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endif
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movem.l (sp)+,d0-d2/a0-a1
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endif
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if DEBUG then
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pea ('save')
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endif
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endm
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; restore some registers saved by a save macro
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macro
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restore &preserve==0
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gblc &savedRegisters
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gbla &port
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if &savedRegisters = '' then
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aerror 'restore: without save'
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else
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if DEBUG then
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if &preserve then
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moveccr -(sp)
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cmp.l #('save'),2(sp)
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else
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cmp.l #('save'),(sp)+
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endif
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beq.s @goodSave
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_Debugger
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@goodSave:
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if &preserve then
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move.w (sp)+,ccr
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free.l
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endif
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endif
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; *** handle case where register is already saved
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if &port then
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movem.l d0-d2/a0-a1,-(sp)
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if &preserve then
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moveccr -(sp)
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move.l 2+5*4(sp),-(sp)
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else
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move.l 5*4(sp),-(sp)
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endif
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_SetPort
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if &preserve then
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move.w (sp)+,ccr
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endif
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movem.l (sp)+,d0-d2/a0-a1
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free.l
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endif
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if &savedRegisters <> 'none' then
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if &subStr(&type(&savedRegisters), 1, 5) = 'REG A' then
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move.l (sp)+,&savedRegisters
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elseif &subStr(&type(&savedRegisters), 1, 4) = 'REG ' then
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if &preserve then
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movem.l (sp)+,&savedRegisters
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else
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move.l (sp)+,&savedRegisters
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endif
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else
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movem.l (sp)+,&savedRegisters
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endif
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endif
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&savedRegisters: setc ''
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endif
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endm
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; pad a piece of memory to blockSize items (item is either bytes, words, or longs)
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macro
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pad.&size &blockSize,&startLabel,&itemValue==0
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lcla &padItems
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lclc &sizeLetter
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&padItems: seta &eval(&blockSize) - (* - &eval(&startLabel))
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&sizeLetter setc &upCase(&sizeLetter)
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if &sizeLetter = '' then
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&sizeLetter: setc 'B'
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elseif &sizeLetter = 'B' then
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elseif &sizeLetter = 'W' then
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&padItems: seta &padItems div 2
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elseif &sizeLetter = 'L' then
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&padItems: seta &padItems div 4
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else
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aerror &concat('pad: cannot handle unknown item length: ',&size)
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endif
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if &padItems < 0 then
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aerror 'pad: cannot pad a block bigger than the block size'
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elseif &padItems > 0 then
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dcb.&itemtype &padItems,&itemValue
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endif
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endm
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; create a jump table starting with the label and having a given prefix
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macro
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&name Table &prefix,&base
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lclc &tableName
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gblc &tablePrefix,&tableBase
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if &name = '' then
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&tableName: setc '@table'
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else
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&tableName: setc &name
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endif
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&tablePrefix: setc &prefix
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if &base = '' then
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&tableBase: setc &tableName
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elseif &upCase(&base) = 'ABSOLUTE' then
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&tableBase: setc ''
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else
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&tableBase: setc &base
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endif
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&tableName:
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endm
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; create a jump table entry
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macro
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dt.&size
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gblc &tablePrefix,&tableBase
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lcla &index
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&index: seta 0
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while &index < &nbr(&syslist) do
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&index: seta &index + 1
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if &tableBase = '' then
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dc.&size &concat(&tablePrefix, &syslist[&index])
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else
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dc.&size &concat(&tablePrefix, &syslist[&index], '-', &tableBase)
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endif
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endwhile
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endm
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; end the with from a previous stack frame (never called directly)
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macro
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endPreviousWith
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gblc &frameState,&endWithModule
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if &sysMod = &endWithModule then
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endwith
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endif
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&frameState: setc ''
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endm
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; declare some results in a stack frame
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macro
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resultsStackFrame &frame
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gblc &frameName,&frameState,&endWithModule
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if &frameState = 'needEndWith' then
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endPreviousWith
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endif
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if &frameState = '' then
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if &frame = '' then
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&frameName: setc 'StackFrame'
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else
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&frameName: setc &frame
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endif
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&frameName: record {savedA6},decr
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&frameState: setc 'results'
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elseif &frameState = 'results'
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aerror 'resultsStackFrame: two without intervening endStackFrame'
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else
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aerror 'resultsStackFrame: must come before parameters and locals'
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endif
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endm
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; declare some parameters in a stack frame
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macro
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parametersStackFrame &frame
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gblc &frameName,&frameState,&endWithModule
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if &frameState = 'needEndWith' then
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endPreviousWith
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endif
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if &frameState = '' then
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resultsStackFrame &frame
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endif
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if &frameState = 'results' then
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belowParameters: equ *
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&frameState: setc 'parameters'
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elseif &frameState = 'parameters' then
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aerror 'parametersStackFrame: two without intervening endStackFrame'
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else
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aerror 'parametersStackFrame: must come before locals'
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endif
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endm
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; declare some locals in a stack frame
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macro
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localsStackFrame &frame
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gblc &frameState
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if &frameState = 'needEndWith' then
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endPreviousWith
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endif
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if &frameState = '' then
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resultsStackFrame &frame
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endif
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if &frameState = 'results' then
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parametersStackFrame
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endif
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if &frameState = 'parameters' then
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org
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parametersSize: equ belowParameters - *
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returnAddress: ds.l 1
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savedA6: ds.l 1
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&frameState: setc 'locals'
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else
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aerror 'localsStackFrame: two without intervening endStackFrame'
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endif
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endm
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; end a stack frame
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macro
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endStackFrame
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gblc &frameName,&frameState
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if &frameState = 'results' then
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parametersStackFrame
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endif
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if &frameState = 'parameters' then
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localsStackFrame
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endif
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if &frameState = 'locals' then
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org
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align
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localsSize: equ *
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endr
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&frameState: setc 'needWith'
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else
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aerror 'endStackFrame: without results or parameters or locals'
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endif
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endm
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; use instead of a link or for debugging
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macro
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linkFrame &size
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gblc &linkState,&frameName,&frameState,&endWithModule
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if &linkState = '' then
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if &frameState = 'needWith' then
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with &frameName
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&frameState: setc 'needEndWith'
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&endWithModule: setc &sysMod
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link a6,#localsSize
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if &size ≠ '' then
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aerror 'linkFrame: specified frame and a specific size'
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endif
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&linkState: setc 'needUnlink'
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elseif &size = '' then
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if DEBUG then
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link a6,#0
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unlk a6
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endif
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&linkState: setc 'needFakeUnlink'
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else
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link a6,#&size
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&linkState: setc 'needUnlink'
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endif
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if DEBUG then
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pea ('link')
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endif
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else
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aerror 'linkFrame: missing unlinkFrame'
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endif
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endm
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; use for any kind of unlink
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macro
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unlinkFrame &preserve==0
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gblc &linkState
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if DEBUG then
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if &preserve then
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moveccr -(sp)
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cmp.l #('link'),2(sp)
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else
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cmp.l #('link'),(sp)+
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endif
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beq.s @goodUnlink
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_Debugger
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@goodUnlink:
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if &preserve then
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move.w (sp)+,ccr
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free.l
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endif
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endif
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if &linkState = 'needUnlink' then
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unlk a6
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&linkState: setc ''
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elseif &linkState = 'needFakeUnlink' then
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if DEBUG then
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bra.s @skipUnlink
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unlk a6
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@skipUnlink:
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endif
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&linkState: setc ''
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else
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aerror 'unlinkFrame: missing linkFrame'
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endif
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endm
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; fake rts for debugging only
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macro
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noReturn
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gblc &linkState
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if &linkState ≠ '' then
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unlinkFrame
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endif
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if DEBUG then
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bra.s @skipReturn
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rts
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@skipReturn:
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endif
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endm
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; rts
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macro
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return &size
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gblc &linkState,&frameState
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lcla &bytes
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if &linkState ≠ '' then
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unlinkFrame
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endif
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if &size = '' then
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if &frameState = '' then
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&bytes: seta 0
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else
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&bytes: seta parametersSize
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endif
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elseif &subStr(&size, 1, 1) = '#' then
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&bytes: seta &strToInt(&subStr(&size, 2, &len(&size) - 1))
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else
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aerror 'return: bad size'
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endif
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if &bytes = 0 then
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rts
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elseif &bytes = 4 then
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move.l (sp)+,(sp)
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rts
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else
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move.l (sp)+,a0
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free.b &bytes
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jmp (a0)
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endif
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endm
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; debugging symbol
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macro
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symbol &routineName=&SysMod,&size=0
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lclc &name, &oldString
|
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|
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if DEBUG then
|
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if &routineName[1:1] = '''' then
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&name: setc &eval(&routineName)
|
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else
|
||
&name: setc &routineName
|
||
endif
|
||
|
||
&oldString: setc &setting('string')
|
||
string asis
|
||
if &len(&name) < 32 then
|
||
dc.b &len(&name)+$80,'&name'
|
||
else
|
||
dc.b $80,&len(&name),'&name'
|
||
endif
|
||
string &oldString
|
||
align
|
||
dc.w &size
|
||
endif
|
||
|
||
endm
|
||
|
||
; composite macros for even shorter use
|
||
|
||
macro
|
||
linkSave ®isters
|
||
|
||
linkFrame
|
||
save ®isters
|
||
|
||
endm
|
||
|
||
macro
|
||
restoreUnlinkReturn
|
||
|
||
restore
|
||
unlinkFrame
|
||
return
|
||
symbol
|
||
|
||
endm
|
||
|
||
|
||
macro
|
||
getCaseState
|
||
|
||
gblc &savedCaseState
|
||
&savedCaseState: SETC &SETTING('CASE')
|
||
|
||
endm
|
||
|
||
macro
|
||
restoreCaseState
|
||
|
||
gblc &savedCaseState
|
||
CASE &savedCaseState
|
||
|
||
endm
|
||
|
||
asmNeedsDSWorkaround default true
|
||
|
||
if asmNeedsDSWorkaround then
|
||
|
||
macro
|
||
&label: dsWorkaround &recordName
|
||
|
||
lclc &savedCaseState
|
||
lclc &upperCaseLabel
|
||
|
||
&savedCaseState: setc &setting('CASE')
|
||
if &savedCaseState = 'ON' then
|
||
&label: ds.b &recordName
|
||
else
|
||
case on
|
||
&upperCaseLabel: setc &upcase(&label)
|
||
&upperCaseLabel: ds.b &recordName
|
||
case &savedCaseState
|
||
endif
|
||
|
||
endm
|
||
|
||
macro
|
||
&label: equWorkaround &someName
|
||
|
||
lclc &savedCaseState
|
||
lclc &upperCaseLabel
|
||
|
||
&savedCaseState: setc &setting('CASE')
|
||
if &savedCaseState = 'ON' then
|
||
&label: ds.b &someName
|
||
else
|
||
case on
|
||
&upperCaseLabel: setc &upcase(&label)
|
||
&upperCaseLabel: ds.b &someName
|
||
case &savedCaseState
|
||
endif
|
||
|
||
endm
|
||
|
||
else
|
||
|
||
macro
|
||
&label: dsWorkaround &recordName
|
||
&label: ds.b &recordName
|
||
endm
|
||
|
||
macro
|
||
&label: equWorkaround &someName
|
||
&label: ds.b &someName
|
||
endm
|
||
|
||
endif
|
||
|
||
ENDIF ; ...already included |