A2osX/BIN/SH.S.CORE.txt
2019-02-21 11:34:28 +00:00

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NEW
PREFIX
AUTO 4,1
.LIST OFF
*--------------------------------------
CORE.Init >LDYAI 256
>SYSCALL GetMem
bcs .9
>STYA ZPArgVBuf
txa
>STA.G CORE.hArgVBuf
.9 rts
*--------------------------------------
CORE.Quit >LDA.G CORE.hArgVBuf
beq .9
>SYSCALL FreeMem
.9 rts
*--------------------------------------
* http://heirloom.sourceforge.net/sh/sh.1.html
*--------------------------------------
* Input : ZPArgVBuf (String)
* Tokenize ZPArgVBuf
* :LOOP
* if CmdSep=| :
* set hStdIn = hStdOut
* set hStdOut = Std
* GetCmd from line until | or EOL
* if CmdSep=| :
* create PIPE
* set hStdOut -> PIPE
* CORE.Exec &
* :LOOP
* else CORE.Exec
*--------------------------------------
* SET VAR = `cmd args`, FOR VAR IN `cmd args`
* create PIPE
* set hStdOut -> PIPE
* CORE.Exec `cmd args` &
* set READMODE
* set hStdIn = hStdOut
* set hStdOut = Std
*--------------------------------------
CORE.Run.CSYN lda #E.CSYN
sec
rts
CORE.Run >LDYA ZPInputBufPtr Save Actual cmd for looping
>STYA ZPInputCmdPtr
>LDYA ZPArgVBuf
>STYA ZPArgVBufPtr
lda #0 Reset ArgV Buffer
sta (ZPArgVBuf)
lda #S.PS.F.HOLD+S.PS.F.DUPENV
>STA.G CORE.PSFlags
lda #$ff
>STA.G CORE.IntCmd assume external
jsr CORE.GetCharNB
bcc .11
jsr IO.Reset
lda #0
sec
rts Ending 0, CS,A=0
.11 cmp #'|'
bne .21
jsr IO.Pipe.In
bcs .9
jsr CORE.GetNextCharNB Skip |
bcs CORE.Run.CSYN
bra .3
.21 pha
jsr IO.Reset
pla
.3 cmp #C.CR
beq .80 empty line ?
.10 cmp #'#' commented line?
bne .2
.12 jsr CORE.GetNextCharNB
bcs .8 EOF
cmp #C.CR
bne .12 EOL
.80 jsr CORE.GetNextChar skip CR...
.8 jsr IO.Reset
lda #0
clc
.9 rts EOL, CS,A=0
.2 cmp #'.'
bne .4
ldy #1
lda (ZPInputBufPtr),y
cmp #C.SPACE
bne .4
>LDA.G CORE.PSFlags yes, child process will run in same ENV
and #$ff^S.PS.F.DUPENV
sta (pData),y
jsr CORE.GetNextCharNB skip ". "
bcs CORE.Run.RTS nothing to execute...
.4 >LDYA L.CMD internal command ?
jsr CORE.LookupInputBuf
bcs .6 no...assume external...no IO token Expected
jsr CORE.SkipCharsA
txa
>STA.G CORE.IntCmd
bra .7 internal, do not add token
.5 >LDYA L.CORE.IO
jsr CORE.LookupInputBuf
bcs .6
jsr CORE.SkipCharsA
jsr CORE.IO.JMP
bcs CORE.Run.RTS
bra .7
.6 jsr CORE.ArgV.Add
.7 jsr CORE.GetCharNB
bcs CORE.ExecCmd.1 Nothing to skip
jsr CORE.IsEndCmd
bcs .5
cmp #'|'
bne CORE.ExecCmd skip CR, ;
jsr IO.Pipe.Out
bcs CORE.Run.RTS
jsr CORE.IO.AMP run in background
bra CORE.ExecCmd.1 Do not skip |
CORE.Run.RTS rts
*--------------------------------------
* Input : ZPArgVBuf
*--------------------------------------
CORE.ExecCmd jsr CORE.GetNextCharNB Skip EoL char
CORE.ExecCmd.1 lda #0
sta (ZPArgVBufPtr)
jsr CORE.StkGet IF,WHILE,FOR ?
bcs .3 no particular context, exec...
tax
>LDA.G CORE.IntCmd
bmi .2 external ...
and #$3F
cmp #C.FOR
bcs .3 FOR...FI : always execute
.2 txa
bpl .8 context is FALSE, skip line
asl
bpl .8 parent context is FALSE, skip line
.3 >LDYA ZPArgVBuf
>STYA ZPArgVBufPtr
>LDA.G CORE.IntCmd
bmi CORE.ExecExtCmd
tax
jmp (J.CMD,x)
.8 clc
rts
CORE.ExecExtCmd >PUSHB.G CORE.PSFlags
>LDYA ZPArgVBuf
>SYSCALL execv
CORE.ExecExtCmd.Exit
bcs .9
tax CPID
>LDA.G CORE.PSFlags
and #S.PS.F.HOLD
bne .4
txa
>PUSHA
>PUSHBI 1
>LDYA L.MSG.PID
>SYSCALL printf
rts
.4 >SLEEP Suspend this PID
sec
ldy #S.PS.RC CPID will update S.PS.RC
lda (pPs),y
bne .9
.8 clc
.9 rts
*--------------------------------------
* search ZPInputBufPtr/ZPArgVBufPtr in Y,A table
*--------------------------------------
CORE.LookupInputBuf
>STYA ZPPtr1
>LDYA ZPInputBufPtr
bra CORE.Lookup
CORE.LookupArgVBuf
>STYA ZPPtr1
>LDYA ZPArgVBufPtr
CORE.Lookup >STYA ZPPtr2
ldx #0
.1 ldy #$ff
.2 iny
lda (ZPPtr2),y
beq .3 Src Keyword end
jsr CORE.IsSpaceOrEndCmd
bcc .3 Src Keyword end
lda (ZPPtr1),y
beq .4 Table Keyword end
lda (ZPPtr2),y
cmp #'a'
bcc .21
cmp #'z'+1
bcs .21
eor #$20
.21 cmp (ZPPtr1),y
beq .2
bra .4
.3 lda (ZPPtr1),y
bne .4
tya Keyword Len
clc
.8 rts
.4 inc ZPPtr1
bne .5
inc ZPPtr1+1
.5 lda (ZPPtr1)
bne .4
inc ZPPtr1
bne .6
inc ZPPtr1+1
.6 inx
inx
lda (ZPPtr1) Array Ending 0, must be an external Cmd....
bne .1
lda #E.CSYN
sec
rts
*--------------------------------------
* ArgV
*--------------------------------------
CORE.ArgV.Add >LDYA ZPArgVBufPtr
>STYA ZPArgVBufPrev Save String start of Expand
lda #C.SPACE
sta TmpByte
jsr CORE.GetCharNB
bcs .9
cmp #'"'
bne .10
sta TmpByte
bra .1
.10 cmp #'`'
bne .11
sta TmpByte
.11 jsr CORE.ArgV.PutChar
.1 jsr CORE.GetNextChar
bcs .5
.2 cmp TmpByte
bne .3
jsr CORE.GetNextChar
bra .5
.3 ldy TmpByte
cpy #C.SPACE
bne .40
jsr CORE.IsEndCmd
bcc .5
.40 jsr CORE.ArgV.PutChar
.4 jsr CORE.GetNextChar
bcc .2
.5 lda #0
jsr CORE.ArgV.PutChar
>LDYA ZPArgVBufPrev
>SYSCALL ExpandStr
bcs .9
phx
>STYA ZPPtr1
>LDYA ZPArgVBufPrev
>STYA ZPArgVBufPtr
ldy #$ff
.7 iny
lda (ZPPtr1),y
jsr CORE.ArgV.PutChar
lda (ZPPtr1),y
bne .7
pla
>SYSCALL freemem
.9 rts
*--------------------------------------
CORE.ArgV.PutChar
sta (ZPArgVBufPtr)
CORE.ArgV.NextChar
inc ZPArgVBufPtr
bne .8
inc ZPArgVBufPtr+1
.8 rts
*--------------------------------------
CORE.ArgV.Next lda (ZPArgVBufPtr)
beq .8
>LDYA ZPArgVBufPtr
>STYA ZPArgVBufPrev
.1 jsr CORE.ArgV.NextChar
lda (ZPArgVBufPtr)
bne .1
jsr CORE.ArgV.NextChar
lda (ZPArgVBufPtr)
.8 rts
*--------------------------------------
* IO
*--------------------------------------
CORE.IO.JMP jmp (J.CORE.IO,x)
CORE.IO.AMP >LDA.G CORE.PSFlags
and #$ff^S.PS.F.HOLD
sta (pData),y
clc
CORE.IO.RTS rts
CORE.IO.IN lda #O.RDONLY+O.TEXT
jsr CORE.IO.Open
bcs CORE.IO.RTS
jmp IO.Set.In
CORE.IO.OUTA
CORE.IO.1OUTA lda #O.WRONLY+O.APPEND+O.CREATE+O.TEXT
bra CORE.IO.OUT.1
CORE.IO.OUT
CORE.IO.1OUT lda #O.WRONLY+O.TRUNC+O.CREATE+O.TEXT
CORE.IO.OUT.1 jsr CORE.IO.Open
bcs CORE.IO.RTS
jmp IO.Set.Out
CORE.IO.2OUTA lda #O.WRONLY+O.APPEND+O.CREATE+O.TEXT
bra CORE.IO.2OUT.1
CORE.IO.2OUT lda #O.WRONLY+O.TRUNC+O.CREATE+O.TEXT
CORE.IO.2OUT.1 jsr CORE.IO.Open
bcs CORE.IO.RTS
jmp IO.Set.Err
*--------------------------------------
CORE.IO.Open pha Open Mode
jsr CORE.GetCharNB
bcs .9 no arg left....
jsr CORE.ArgV.Add Get Filename
>PUSHWI 0 Aux type
>PUSHBI S.FI.T.TXT ftype
pla
>PUSHA flags
>LDYA ZPArgVBufPrev
>STYA ZPArgVBufPtr Discard filename
>SYSCALL fopen
rts
.9 pla
lda #E.CSYN
sec
rts
*--------------------------------------
* Input Buffer
*--------------------------------------
CORE.IsSpaceOrEndCmd
cmp #C.SPACE
beq CORE.IsEndCmd.8
CORE.IsEndCmd cmp #';'
beq CORE.IsEndCmd.8
cmp #C.CR
beq CORE.IsEndCmd.8
cmp #'|'
beq CORE.IsEndCmd.8
sec
rts
CORE.IsEndCmd.8 clc
rts
*--------------------------------------
CORE.GetCharNB jsr CORE.GetChar
bcs CORE.GetNextCharNB.RTS
jsr CORE.CheckCharNB
bcc CORE.GetNextCharNB.RTS
*--------------------------------------
CORE.GetNextCharNB
jsr CORE.GetNextChar
bcs CORE.GetNextCharNB.RTS
jsr CORE.CheckCharNB
bcs CORE.GetNextCharNB
CORE.GetNextCharNB.RTS
rts
*--------------------------------------
CORE.CheckCharNB
cmp #C.SPACE
beq .9
cmp #C.LF
beq .9
cmp #C.TAB
beq .9
clc
.9 rts
*--------------------------------------
CORE.GetNextChar
inc ZPInputBufPtr
bne CORE.GetChar
inc ZPInputBufPtr+1
*--------------------------------------
CORE.GetChar lda (ZPInputBufPtr)
beq .9
clc
rts
.9 sec
rts
*--------------------------------------
CORE.SkipCharsA clc
adc ZPInputBufPtr
sta ZPInputBufPtr
bcc .8
inc ZPInputBufPtr+1
.8 rts
*--------------------------------------
* Stack
*--------------------------------------
CORE.StkPushPtr lda ZPInputCmdPtr
jsr CORE.StkPush
bcs CORE.StkPullPtr.9
lda ZPInputCmdPtr+1
bra CORE.StkPush
*--------------------------------------
CORE.StkPullPtr jsr CORE.StkPull
bcs CORE.StkPullPtr.9
sta ZPInputBufPtr+1
jsr CORE.StkPull
bcs CORE.StkPullPtr.9
sta ZPInputBufPtr
CORE.StkPullPtr.9
rts
*--------------------------------------
CORE.StkGetPtr lda (pData) StackPtr
beq CORE.StkErr
dec
beq CORE.StkErr
tay
lda (pData),y
sta ZPInputBufPtr
iny
lda (pData),y
sta ZPInputBufPtr+1
clc
rts
CORE.StkErr lda #E.STACKERROR
sec
rts
*--------------------------------------
CORE.StkPush pha
lda (pData) StackPtr
inc
cmp #CORE.STACK.MAX
beq .9
sta (pData) StackPtr
tay
pla
sta (pData),y
* clc
rts
.9 pla
lda #E.STKOVERFLOW
* sec
rts
*--------------------------------------
CORE.StkPull jsr CORE.StkGet
bcs .9
dey
pha
tya
sta (pData) StackPtr
pla
.9 rts
*--------------------------------------
CORE.StkGet lda (pData) StackPtr
beq CORE.StkErr
tay
lda (pData),y
clc
rts
*--------------------------------------
MAN
SAVE USR/SRC/BIN/SH.S.CORE
LOAD USR/SRC/BIN/SH.S
ASM