A2osX/SYS/KERNEL.S.ARG.txt
2018-11-17 18:17:13 +01:00

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NEW
PREFIX
AUTO 4,1
*/--------------------------------------
* # Args2ArgV
* Expand String and convert to ArgV List
* ## C
* short int args2argv(char* args, char* argv[])
* ## ASM
* `>PUSHW argv`
* `>LDYA args`
* `>SYSCALL Args2ArgV
* ## RETURN VALUE
* A = Arg count
*\--------------------------------------
ARG.bInQuote .BS 1
*--------------------------------------
K.Args2ArgV jsr K.ExpandStr
bcs .9
>STYA ZPPtr1
stx .80+1
>PULLW ZPPtr2 Get target buffer
ldx #0 Arg Count
stz ARG.bInQuote
.1 jsr MEM.GetCharPtr1
beq .8
cmp #C.SPACE
beq .1 skip leading spaces
.2 cmp #'"' found a quote ?
bne .3
lda ARG.bInQuote
eor #$ff
sta ARG.bInQuote
bra .7 skip quote and check next char
.3 cmp #C.SPACE
bne .6 regular char ...store...
bit ARG.bInQuote
bmi .6 between quotes... store space...
inx Found one arg !!!
lda #0 set this token End
jsr MEM.PutCharPtr2
bra .1
.6 jsr MEM.PutCharPtr2
.7 jsr MEM.GetCharPtr1
bne .2
inx
.8 jsr MEM.PutCharPtr2 set Argv[x] Ending 0
sta (ZPPtr2) set Array Ending 0
phx
.80 lda #$FF SELF MODIFIED
jsr K.FreeMem Discard expanded string
pla get back Arg Count
* clc
rts
.9 >RET 2 Discard target buffer
*/--------------------------------------
* # ArgV
* ## ASM
* **In:**
* 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 ZPPtr1
.1 lda (ZPPtr1) end of ARGV[] ?
beq .9 yes, not found....
dex
bmi .7
.3 jsr MEM.GetCharPtr1 skip str
bne .3
jsr MEM.NextCharPtr1 skip \0
bra .1
.7 >LDYA ZPPtr1
.8 clc
rts
.9 sec
rts
*--------------------------------------
MAN
SAVE USR/SRC/SYS/KERNEL.S.ARG
LOAD USR/SRC/SYS/KERNEL.S
ASM