A2osX/BIN/CMP.S.txt

NEW
  AUTO 3,1
				.LIST OFF
				.OP	65C02
				.OR	$2000
				.TF bin/cmp
*--------------------------------------
				.INB inc/macros.i
				.INB inc/a2osx.i
				.INB inc/mli.i
				.INB inc/mli.e.i
*--------------------------------------
				.DUMMY
				.OR ZPBIN
ZS.START
ArgIndex		.BS 1
ZPPtr1			.BS 2

bPause			.BS 1
bAll			.BS 1
bVerbose		.BS 1
bDiff			.BS 1

hFile1			.BS 1
hBuf1			.BS 1
ZPBufPtr1		.BS 2
bSkip1			.BS 1
hFile2			.BS 1
hBuf2			.BS 1
ZPBufPtr2		.BS 2
bSkip2			.BS 1

Offset			.BS 2
BufCnt			.BS 2
SeekOfs			.BS 4			
ZS.END			.ED	
*--------------------------------------
*			File Header (16 Bytes)
*--------------------------------------
CS.START		cld
				jmp (.1,x)
				.DA #$61				6502,Level 1 (65c02)
				.DA #1					BIN Layout Version 1
				.DA #S.PS.F.EVENT		S.PS.F
				.DA #0
				.DA CS.END-CS.START		CS
				.DA DS.END-DS.START		DS
				.DA #64					SS
				.DA #ZS.END-ZS.START	Zero Page Size
				.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1				.DA CS.INIT
				.DA CS.RUN
				.DA CS.DOEVENT		
				.DA	CS.QUIT
L.MSG.USAGE		.DA MSG.USAGE
L.MSG.DIFF		.DA MSG.DIFF
				.DA 0
*--------------------------------------
CS.INIT			clc
				rts
*--------------------------------------
CS.RUN			
.1				inc ArgIndex
				lda ArgIndex
				>SYSCALL ArgV
				bcs .7

				>STYA ZPPtr1

				lda (ZPPtr1)
				cmp #'-'
				bne .2
				jsr CS.RUN.CheckOpt
				bcc .1
				
.99				>PUSHW L.MSG.USAGE
				>PUSHBI 0
				>SYSCALL PrintF
				lda #E.SYN
				sec
.9				rts

.2				lda hFile1
				bne .3

				jsr CS.RUN.OPEN
				bcs .9

				sta hFile1

				bra .1

.3				lda hFile2
				bne .4

				jsr CS.RUN.OPEN
				bcs .9

				sta hFile2

				bra .1

.4				bit bSkip1
				bmi .5
				jsr CS.RUN.SEEK
				bcs .9
				sec
				ror bSkip1
				bra .1

.5				bit bSkip2
				bmi .99

				sta bSkip2
				jsr CS.RUN.SEEK
				bcs .9

				sec
				ror bSkip2
				jmp .1

.7				lda hFile2
				beq .99
				lda hFile1
				beq .99

.8				>LDYAI 256
				>SYSCALL GetMem
				bcs .9

				>STYA ZPBufPtr1
				stx hBuf1

				>LDYAI 256
				>SYSCALL GetMem
				bcs .9

				>STYA ZPBufPtr2
				stx hBuf2
*--------------------------------------
CS.RUN.LOOP		ldy #S.PS.hStdIn
				lda (pPS),y
				>SYSCALL FEOF
				bcs .9					IO error
				tay
				bne .1					no char

				>SYSCALL GetChar
				bcs .9					IO error
				cmp #$03				Ctrl-C
				beq .9					Abort....
				cmp #$13				Ctrl-S
				bne .1

				lda bPause
				eor	#$ff
				sta bPause
				bne CS.RUN.LOOP
.1				lda bPause
				bne CS.RUN.LOOP			Pause...

				jsr CS.RUN.READ1
				bcc .2
				cmp #MLI.E.EOF
				bne .9
				bra .99
.2				>STYA BufCnt
				jsr CS.RUN.READ2
				bcc .20
				cmp #MLI.E.EOF
				bne .9
				bra .99
.20				cpy BufCnt
				pha
				sbc BufCnt+1
				pla
				bcc .3
				>STYA BufCnt
.3				ldy #0

.4				lda (ZPBufPtr1),y
				cmp (ZPBufPtr2),y
				beq .8
				lda #$E0
				sta bDiff
				bit bVerbose
				bpl .5
				jsr CS.RUN.Print
				bcs .9
.5				bit bAll
				bpl .99
.8				iny
				cpy BufCnt
				bne .4
				inc Offset
				bne CS.RUN.LOOP
				inc Offset+1
				bra CS.RUN.LOOP
.99				lda bDiff
.9				sec
				rts
*--------------------------------------
CS.RUN.OPEN		>PUSHW ZPPtr1
				>PUSHBI	O.RDONLY
				>PUSHBI 0			Type
				>PUSHWZ				Aux type
				>SYSCALL FOpen
				rts
*--------------------------------------
CS.RUN.SEEK		>LDYA ZPPtr1
				>SYSCALL AToL
				bcs .9

				>PULLL SeekOfs
				lda bSkip1
				bmi .1
				>PUSHBI SEEK.SET
				>PUSHL SeekOfs
				lda hFile1

				>SYSCALL FSeek
				bcs .9
.1				>PUSHBI SEEK.SET
				>PUSHL SeekOfs
				lda hFile2
				>SYSCALL FSeek

.9				rts
*--------------------------------------
CS.RUN.READ1	>PUSHWI 256
				>PUSHW ZPBufPtr1
				lda hFile1
				>SYSCALL FRead
				rts
*--------------------------------------
CS.RUN.READ2	>PUSHWI 256
				>PUSHW ZPBufPtr2
				lda hFile2
				>SYSCALL FRead
				rts
*--------------------------------------
CS.RUN.Print	phy

				>PUSHW L.MSG.DIFF
				>PUSHW Offset
				tya
				>PUSHA
				>PUSHB (ZPBufPtr1),y
				>PUSHB (ZPBufPtr2),y
				>PUSHBI 5
				>SYSCALL PrintF

				ply
				rts
*--------------------------------------
CS.QUIT			lda hFile2
				beq .1
				>SYSCALL FClose
.1				lda hFile1
				beq .2
				>SYSCALL FClose

.2				lda hBuf2
				beq .3
				>SYSCALL FreeMem

.3				lda hBuf1
				beq .8
				>SYSCALL FreeMem
.8				clc
				rts
*--------------------------------------
CS.DOEVENT		sec
				rts
*--------------------------------------
CS.RUN.CheckOpt	ldy #1 
				lda (ZPPtr1),y

				ldy #OptionVars-OptionList-1

.2				cmp OptionList,y
				beq .3
				dey
				bpl .2

				sec
				rts
				
.3				ldx OptionVars,y
				lda #$ff
				sta 0,x
				clc
				rts
*--------------------------------------
CS.END
*--------------------------------------
OptionList		.AS "AaVv"
OptionVars		.DA #bAll,#bAll,#bVerbose,#bVerbose
*--------------------------------------
MSG.USAGE		.AS "Usage : CMP File1 File2 [SKIP1 [SKIP2]]\r\n"
				.AS "   -A : Shows All differences\r\n"
				.AZ "   -V : Verbose Mode\r\n"
MSG.DIFF		.AZ "%H%h:%h %h\r\n"
*--------------------------------------
				.DUMMY
				.OR 0
DS.START
DS.END
				.ED
*--------------------------------------
MAN
SAVE usr/src/bin/cmp.s
ASM