A2osX/SYS/KERNEL.S.ARG.txt

NEW
PREFIX /A2OSX.BUILD
AUTO 4,1
*/--------------------------------------
* # Args2ArgV
* int args2argv(char* args, char* argv[])
* ## ASM
* `>PUSHW argv`
* `>LDYA args`
* `>SYSCALL Args2ArgV
* ## RETURN VALUE 
*\--------------------------------------
ARG.bInQuote	.BS 1
*--------------------------------------
K.Args2ArgV		jsr MEM.SPtr1PPtr2

				ldx #0				Arg Count
				
				stz ARG.bInQuote

.1				jsr ARG.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 ARG.PutCharPtr2
				bra .1
				
.6				jsr ARG.PutCharPtr2

.7				jsr ARG.GetCharPtr1
				bne .2
				
				inx
				
.8				jsr ARG.PutCharPtr2	set Argv[x] Ending 0

				sta (ZPPtr2)		set Array Ending 0
				
				txa					X=Arg Count

				clc
.9				rts
*/--------------------------------------
* # 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 ARG.GetCharPtr1		skip str
				bne .3

				jsr ARG.NextCharPtr1	skip \0
				bra .1

.7				>LDYA ZPPtr1
				
.8				clc
				rts

.9				sec
				rts	
*--------------------------------------
ARG.GetCharPtr1	lda (ZPPtr1)
				beq ARG.GetCharPtr1.8
ARG.NextCharPtr1				
				inc ZPPtr1
				bne ARG.GetCharPtr1.8
				inc ZPPtr1+1			never Z
ARG.GetCharPtr1.8
				rts
*--------------------------------------
ARG.PutCharPtr2	sta (ZPPtr2)
				inc ZPPtr2
				bne .8
				inc ZPPtr2+1
.8				rts
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.ARG
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM