A2osX/SYS/KERNEL.S.ARG.txt
2020-08-02 14:19:43 +02:00

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NEW
AUTO 3,1
*/--------------------------------------
* # 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 #$ff
.1 iny
lda (ZPPtr1),y
bne .1
.2 jsr SHARED.AddYp1ToPtr1
ldy #$ff
.3 iny
lda (ZPPtr1),y
sta (ZPPtr2),y
bne .3
tya
beq .8
jsr SHARED.AddYp1ToPtr2
bra .2
.8 ldy #S.PS.ARGC
lda (pPS),y
dec
sta (pPS),y
clc
.9 rts
*/--------------------------------------
* # ArgV
* ## ASM
* A = argument index.
* ## RETURN VALUE
* CC : success
* Y,A = PTR To Arg[A]
* CS : Out Of Bound
*\--------------------------------------
K.ArgV tax save requested arg#
ldy #S.PS.hARGV
lda (pPS),y
jsr K.GetMemPtr
>STYA ZPPtr2 Use Ptr2, called from ExpandStr
.1 lda (ZPPtr2) end of ARGV[] ?
beq .9 yes, not found....
dex
bmi .7
.3 jsr SHARED.GetCharPtr2 skip str
bne .3
jsr SHARED.NextCharPtr2 skip \0
bra .1
.7 >LDYA ZPPtr2
.8 clc
rts
.9 lda #E.OOB
sec
rts
*/--------------------------------------
* # Arg2ArgV
* Expand String and convert to StrV List
* ## C
* short int arg2argv(char* args, char* argv[])
* ## ASM
* `>PUSHW args`
* `>PUSHW argv`
* `>SYSCALL Arg2ArgV`
* ## RETURN VALUE
* A = Arg count
*\--------------------------------------
K.Arg2ArgV >PULLW ZPPtr2 Get target buffer
>PUSHWI 0 allocate a new buffer
jsr K.Expand args on stack
bcs .9
>STYA ZPPtr1
stx .80+1
ldx #0 Arg Count
ldy #0 bInQuote
.1 jsr SHARED.GetCharPtr1
beq .8
cmp #C.SPACE
beq .1 skip leading spaces
.2 cmp #'"' found a quote ?
bne .3
tya
eor #$ff
tay
bra .7 skip quote and check next char
.3 cmp #C.SPACE
bne .6 regular char ...store...
tya
bmi .4 between quotes... store space...
inx Found one arg !!!
lda #0 set this token End
jsr SHARED.PutCharPtr2
bra .1
.4 lda #C.SPACE
.6 jsr SHARED.PutCharPtr2
.7 jsr SHARED.GetCharPtr1
bne .2
inx
.8 jsr SHARED.PutCharPtr2 set Argv[x] Ending 0
sta (ZPPtr2) set Array Ending 0
phx
.80 lda #$FF SELF MODIFIED
jsr K.FreeMem Discard expanded string
pla get back Arg Count
* clc
.9 rts
*/--------------------------------------
* # 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
jsr STRV.Ptr1Ptr2cpy
txa Count
plx hMem
clc
.9 rts
*--------------------------------------
MAN
SAVE usr/src/sys/kernel.s.arg
LOAD usr/src/sys/kernel.s
ASM