A2osX/SYS/KERNEL.S.ARG.txt

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NEW
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AUTO 3,1
*/--------------------------------------
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* # Shift
* ## ASM
* A = argument index.
* ## RETURN VALUE
* CC : success
* Y,A = PTR To Arg[A]
* CS : Out Of Bound
*\--------------------------------------
K.Shift jsr K.ArgV
bcs .9
>STYA ZPPtr1
* >STYA ZPPtr2 already set from ArgV
ldy #$ff
.1 iny
lda (ZPPtr1),y
bne .1
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.2 jsr SHARED.AddYp12P1
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ldy #$ff
.3 iny
lda (ZPPtr1),y
sta (ZPPtr2),y
bne .3
tya
beq .8
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jsr SHARED.AddYp12P2
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bra .2
.8 ldy #S.PS.ARGC
lda (pPS),y
dec
sta (pPS),y
clc
.9 rts
*/--------------------------------------
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* # ArgV
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* ## ASM
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* A = argument index.
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* ## RETURN VALUE
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* CC : success
* Y,A = PTR To Arg[A]
* CS : Out Of Bound
*\--------------------------------------
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K.ArgV tax save requested arg#
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ldy #S.PS.hARGV
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lda (pPS),y
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jsr K.GetMemPtr
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>STYA ZPPtr2 Use Ptr2, called from ExpandStr
.1 lda (ZPPtr2) end of ARGV[] ?
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beq .9 yes, not found....
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dex
bmi .7
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.3 jsr SHARED.GetCP2 skip str
bne .3
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jsr SHARED.NextCP2 skip \0
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bra .1
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.7 >LDYA ZPPtr2
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.8 clc
rts
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.9 lda #E.OOB
sec
rts
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*/--------------------------------------
* # Arg2ArgV
* Expand String and convert to StrV List
* ## C
* short int arg2argv(char* args, char* argv[])
* ## ASM
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* `>PUSHW args`
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* `>PUSHW argv`
* `>SYSCALL Arg2ArgV`
* ## RETURN VALUE
* A = Arg count
*\--------------------------------------
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K.Arg2ArgV >PULLW ZPPtr2 Get target buffer
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>PUSHWZ allocate a new buffer
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jsr K.Expand args on stack
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bcs .9
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>STYA ZPPtr1
stx .80+1
ldx #0 Arg Count
ldy #0 bInQuote
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.1 jsr SHARED.GetCP1
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beq .8
cmp #C.SPACE
beq .1 skip leading spaces
.2 cmp #'"' found a quote ?
bne .3
tya
eor #$ff
tay
bra .7 skip quote and check next char
.3 cmp #C.SPACE
bne .6 regular char ...store...
tya
bmi .4 between quotes... store space...
inx Found one arg !!!
lda #0 set this token End
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jsr SHARED.PutCP2
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bra .1
.4 lda #C.SPACE
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.6 jsr SHARED.PutCP2
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.7 jsr SHARED.GetCP1
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bne .2
inx
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.8 jsr SHARED.PutCP2 set Argv[x] Ending 0
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sta (ZPPtr2) set Array Ending 0
phx
.80 lda #$FF SELF MODIFIED
jsr K.FreeMem Discard expanded string
pla get back Arg Count
* clc
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.9 rts
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*/--------------------------------------
* # ArgVDup
* ## ASM
* Y,A = Src StrV
* ## RETURN VALUE
* X = hMem of new StrV
* A = Str Count
*\--------------------------------------
K.ArgVDup >STYA ZPPtr1
>STYA ZPPtr2
ldy #0
ldx #0
.1 lda (ZPPtr2),y
beq .2
.11 iny
bne .1
inx
inc ZPPtr2+1
bra .1
.2 iny
bne .3
inx
inc ZPPtr2+1
.3 lda (ZPPtr2),y
bne .11
txa
jsr K.getmem
bcs .9
>STYA ZPPtr2
phx
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ldx #0
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ldy #0
.4 lda (ZPPtr1),y
sta (ZPPtr2),y
beq .6
.5 iny
bne .4
inc ZPPtr1+1
inc ZPPtr2+1
bra .4
.6 inx
iny
bne .7
inc ZPPtr1+1
inc ZPPtr2+1
.7 lda (ZPPtr1),y
sta (ZPPtr2),y Ending \0 ?
bne .5
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txa Count
plx hMem
clc
.9 rts
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*--------------------------------------
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MAN
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SAVE usr/src/sys/kernel.s.arg
LOAD usr/src/sys/kernel.s
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ASM