A2osX/SYS/KERNEL.S.STR.txt

PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
				.LIST OFF
*--------------------------------------
* S.NewPStrYA
*  IN:
*	Y,A = PTR to buffer
*  OUT:
*   Y,A = PTR to String
*   X = hMem (PSTRING)
*--------------------------------------
S.NewPStrYA		>STYA ZPQuickPtr1
				lda (ZPQuickPtr1)
				inc
				tay
				lda #0					Y,A = len of new string
				>PUSHYA
				>PUSHBI 0				0 = no option
				jsr S.GetMem
				bcs .9

				>STYA ZPQuickPtr2

				jsr S.PStrCpyPtr1Ptr2
				
				>LDYA ZPQuickPtr2

				clc
				rts
				
.9				sec
				rts
*--------------------------------------
* S.PStrCpy
* IN: 
*  PULLW = PSTR to DST (PSTRING)
*  PULLW = PSTR to SRC (PSTRING)
* OUT: 
*  DST = SRC (PSTRING)
*--------------------------------------
S.PStrCpy		>PULLW ZPQuickPtr2		save DST
				>PULLW ZPQuickPtr1		save SRC
		
S.PStrCpyPtr1Ptr2
				lda (ZPQuickPtr1)
				sta (ZPQuickPtr2)
				tay
				beq .2
				
.1				lda (ZPQuickPtr1),y
				sta (ZPQuickPtr2),y
				dey
				bne .1
				
.2				clc
				rts
*--------------------------------------
* S.PStrCat
* IN: 
*  PULLW = PSTR to DST (PSTRING)
*  PULLW = PSTR to SRC (PSTRING)
* OUT: 
*  DST = DST+SRC (PSTRING)
*--------------------------------------
S.PStrCat		>PULLW ZPQuickPtr2		save DST
				>PULLW ZPQuickPtr1		save SRC
				
				lda (ZPQuickPtr1)
				tax
				
				lda (ZPQuickPtr2)
				tay
				
.1				cpy #255
				beq .8

				iny
				
				inc ZPQuickPtr1
				bne .2
				inc ZPQuickPtr1+1
				
.2				lda (ZPQuickPtr1)
				sta (ZPQuickPtr2),y
				dex
				bne .1
				
.8				tya
				sta	(ZPQuickPtr2)
				clc
				rts	
*--------------------------------------
* S.PStrMatch
*  IN: 
*   PULLB = PTR to String (PSTRING)
*   PULLB = PTR to Pattern (PSTRING)
*  OUT: 
*   cc = match
*	cs = no match
*--------------------------------------
S.PStrMatch		>PULLW ZPQuickPtr2		pull String
				>PULLW ZPQuickPtr1		pull Pattern
				
				lda (ZPQuickPTR1)		Keep Pattern Length in X 
                tax 
                beq .8                  Match always if empty 
				ldy #0

.1				inc ZPQuickPTR1			Make PTR1 advance to next char 
                bne .2 
				inc ZPQuickPTR1+1 

.2				lda (ZPQuickPTR1)       get pattern char 
				cmp #'*' 
				beq .5
                                        
.3				tya						we must match ? or regular char 
                cmp (ZPQuickPTR2)       check if at end of string 
                beq .9                  yes, no char left, exit with error 
                                        
				iny                     advance to next char to compare 
                                                
				lda (ZPQuickPTR1)       get back pattern char 
				cmp #'?' 
				beq .4                  no need to compare, any char will match 
				cmp (ZPQuickPTR2),y     Regular Char, compare with string at Y 
				bne .9                  no match, exit 
                                        
.4				dex 					char matched, check if end of pattern 
				bne .1					continue if remaining char in pattern 

				tya						end of pattern, but end of string ? 
				cmp (ZPQuickPTR2)       end of string ? 
				beq .8					yes, string matched entirely 
				bra .9					no, remaining char in string, no match 

.5				dex						we have '*', last char of pattern ? 
				beq .8					yes, match everything, including empty string 
                                        
				inc ZPQuickPTR1			Make PTR1 advance to next char 
				bne .6 
				inc ZPQuickPTR1+1 
                                        
.6				lda (ZPQuickPTR1)       get next char of pattern 
				cmp #'*'				another '*' ? 
				beq .5					yes, '**' = '*', go next char 
				cmp #'?'				'*?' ??? we must match a least one char 
				beq .3 
                                        
.7				tya						we need at least one remaining char in string, 
				cmp (ZPQuickPTR2)       check if at end of string 
				beq .9					no chance to match ? or regular char 
                                        
				iny 
				lda (ZPQuickPTR1)       get again char in pattern 
				cmp (ZPQuickPTR2),y 	compare with char in string 
                bne .7  	            not equal to next non wildcard in pattern 

				bra .4                  go check remaining char in pattern... 
                                        
.8				clc 
                rts 
                                        
.9              sec 
                rts 
*--------------------------------------
* S.PStrUprYA
* S.PStrLwrYA
*  IN:
*	Y,A = PTR to String (PSTRING)
*  OUT:
*   Uppercased/lowercased String in Buffer
*--------------------------------------
S.PStrUprYA		ldx #0
				.HS 2C					bit abs
S.PStrLwrYA		ldx #2
				>STYA ZPQuickPtr1

				lda (ZPQuickPtr1)
				tay
				
.1				lda (ZPQuickPtr1),y
				cmp S.PstrUprLwr,x
				bcc .2
				cmp S.PstrUprLwr+1,x
				bcs .2
				eor #$20
				sta (ZPQuickPtr1),y
.2				dey
				bne .1
				
				clc
				rts
*--------------------------------------
S.PstrUprLwr	.AS "azAZ"
*--------------------------------------
* S.PStr2StrArrayYA
*  In : 
*   Y,A = PTR to String
*  Out :
*   Y,A = PTR to StrArray
*   X = hMem
*--------------------------------------
S.PStr2StrArrayYA
				>STYA ZPQuickPtr1
				lda (ZPQuickPtr1)		Get mem size STRLEN+1
				ldx #0
				inc
				bne .1
				inx
				
.1				>PUSHAX
				>PUSHBI 0
				jsr S.GetMem
				bcs .9
				phx					save hMem
				phy					save PTR.LO
				pha					save PTR.HI
				>STYA ZPQuickPtr2

				lda (ZPQuickPtr1)
				tax					count in src string
				beq .8
				
				ldy #0				reset index in dst token

.3				inc ZPQuickPtr1		get...
				bne .4
				inc ZPQuickPtr1+1
.4				lda (ZPQuickPtr1)	...next char

				cmp #' '			found a space ?
				bne .6
				
				tya					in a token ?
				beq .7				no, skip & go to next char
				
				sta (ZPQuickPtr2)	yes, set this token len
				sec
				adc ZPQuickPtr2		advance to next token
				sta ZPQuickPtr2
				bcc .5
				inc ZPQuickPtr2+1
				
.5				ldy #0				reset index in dst token
				bra .7
				
.6				iny					add char to token
				sta (ZPQuickPtr2),y
				
.7				dex					end of src string?
				bne .3				no...next char...
				
				tya					yes, are we in a token ?
				beq .8
				
				sta (ZPQuickPtr2)	yes, set last token len
				sec
				adc ZPQuickPtr2		advance to next token
				sta ZPQuickPtr2
				bcc .8
				inc ZPQuickPtr2+1
				
.8				lda #0
				sta (ZPQuickPtr2)	set Array Ending 0
				
				pla					get back PTR.HI
				ply					get back PTR.LO
				plx					get back hMem
				clc
.9				rts				
*--------------------------------------
MAN
SAVE SYS/KERNEL.S.STR
LOAD SYS/KERNEL.S
ASM