A2osX/BIN/SED.S.txt
2021-06-23 11:22:33 -04:00

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NEW
AUTO 3,1
.LIST OFF
.OP 65C02
.OR $2000
.TF bin/sed
*--------------------------------------
.INB inc/macros.i
.INB inc/a2osx.i
.INB inc/kernel.i
.INB inc/mli.i
.INB inc/mli.e.i
*--------------------------------------
.DUMMY
.OR ZPBIN
ZS.START
ArgIndex .BS 1
ArgPattern .BS 1
ZPPtr1 .BS 2
ZPPatternPtr .BS 2
ZPBufPtr .BS 2
hFile .BS 1
hBuf .BS 1
LineNum .BS 2
char .BS 1
delimiter .BS 1
replaceidx .BS 1
bIgnoreCase .BS 1
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 #0 S.PS.F.EVENT
.DA #0
.DA CS.END-CS.START Code Size (without Constants)
.DA DS.END-DS.START Data Segment Size
.DA #16 Stack Size
.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.CRLF .DA MSG.CRLF
.DA 0
*--------------------------------------
CS.INIT clc
rts
*--------------------------------------
CS.RUN jsr CS.RUN.CheckArgs
bcs CS.RUN.LOOP.RTS
stz LineNum
stz LineNum+1
CS.RUN.LOOP >SLEEP
>PUSHB hFile
>PUSHW ZPBufPtr
>PUSHWI 256
>SYSCALL FGetS
bcs .9
inc LineNum
bne .2
inc LineNum+1
.2 jsr CS.RUN.PRINT
bcc CS.RUN.LOOP
rts
.9 cmp #MLI.E.EOF
bne .99
lda #0 Exit with no Error
.99 sec
CS.RUN.LOOP.RTS rts
*--------------------------------------
CS.RUN.CheckArgs
jsr CS.RUN.NextArg
bcs .4
lda (ZPPtr1)
cmp #'-'
beq .1
lda ArgPattern
bne .11
lda ArgIndex
sta ArgPattern
>LDYA ZPPtr1
>STYA ZPPatternPtr
jsr CS.RUN.SEDParser
bcs .97
bra CS.RUN.CheckArgs
.11 lda hFile
bne .97
>LDYA ZPPtr1
jsr CS.RUN.OPEN
bcs .9
sta hFile
bra CS.RUN.CheckArgs
.1 ldy #1
lda (ZPPtr1),y
ldx #OptionList.Cnt-1
.2 cmp OptionList,x
beq .3
dex
bpl .2
bra .97
.3 txa
lsr
beq .98
tax
lda #$80
sta bIgnoreCase-1,x
bra CS.RUN.CheckArgs
.4 lda hFile
bne .80
ldy #S.PS.hStdIn
lda (pPS),y
tax
lsr
bcs .97
lda Nod.Table.hFD-2,x
>SYSCALL GetMemPtr
>STYA ZPPtr1
lda (ZPPtr1)
cmp #S.FD.T.PIPE
bne .97
ldy #S.PS.hStdIn
lda (pPS),y
sta hFile
.80 >LDYAI 256
>SYSCALL GetMem
bcs .9
>STYA ZPBufPtr
stx hBuf
* clc
.9 rts
.97 lda #E.SYN
.98 pha
>PUSHW L.MSG.USAGE
>PUSHBI 0
>SYSCALL PrintF
pla
sec
rts
*--------------------------------------
CS.RUN.NextArg inc ArgIndex
lda ArgIndex
>SYSCALL ArgV
bcs .9
>STYA ZPPtr1
.9 rts
*--------------------------------------
CS.RUN.SEDParser
* On entry, the expression is in ZPPatternPtr
* We are looking for "s/search string/replace string/"
* The '/' delimiter can be any char
* On exit. ZPPatternPtr points to delimiter-terminated search string,
* replaceidx contains the offset to the start of replacement str
stz LineNum Reusing this as cntr
lda (ZPPatternPtr)
cmp #'s' Substitute cmd
bne .8 If not, error
ldy #$01 Delimiter char
lda (ZPPatternPtr),y
sta delimiter Stash for later
.2 iny
lda (ZPPatternPtr),y
beq .4 End of string
cmp delimiter Is it delimiter?
bne .2
inc LineNum Keep count
lda LineNum
cmp #$01 Second delim
bne .2
sty replaceidx
bra .2
.4 lda LineNum Check # of delims
cmp #$02
bne .8
inc ZPPatternPtr Eat 's/'
bne .5
inc ZPPatternPtr+1
.5 inc ZPPatternPtr
bne .7
inc ZPPatternPtr+1
.7 clc
rts No error return
.8 sec
rts
*--------------------------------------
CS.RUN.OPEN >PUSHYA
>PUSHBI O.RDONLY+O.TEXT
>PUSHBI S.FI.T.TXT
>PUSHWZ Aux type
>SYSCALL FOpen
bcs .9
sta hFile
.9 rts
*--------------------------------------
CS.RUN.PRINT >LDYA ZPBufPtr
>STYA ZPPtr1
.1 lda (ZPPtr1)
beq .7 EOL. No match.
ldy #$ff
.2 iny
lda (ZPPtr1),y
bne .3
lda (ZPPatternPtr),y EOL
cmp delimiter
bne .7 Not end of pattern
* No match.
.3 lda (ZPPatternPtr),y
cmp delimiter
beq .5 Match
jsr CS.RUN.toUpper
sta char
lda (ZPPtr1),y
jsr CS.RUN.toUpper
cmp char
beq .2
bra .6 No match
* Found a match
.5 jsr CS.RUN.GotMatch
bra .1
* Mismatch with pattern, keep going
.6 jsr CS.RUN.NoMatch
bra .1
* Hit EOL but not end of pattern, return
.7 jsr CS.RUN.NoMatch
lda #C.CR
>SYSCALL PutChar
lda #C.LF
>SYSCALL PutChar
clc
rts
*--------------------------------------
CS.RUN.GotMatch phy
ldy replaceidx
dey
.1 lda (ZPPatternPtr),y
cmp delimiter
beq .5
phy
>SYSCALL PutChar
ply
iny
bra .1
.5 ply
tya Advance ZPPtr1 by Y
clc
adc ZPPtr1
sta ZPPtr1
lda #$00
adc ZPPtr1+1
sta ZPPtr1+1
ldy #$00
rts
*--------------------------------------
CS.RUN.NoMatch lda (ZPPtr1) Print ZPPtr1->ZPPtr1+Y
phy
>SYSCALL PutChar
ply
inc ZPPtr1
bne .2
inc ZPPtr1+1
.2 dey
cpy #$ff
bne CS.RUN.NoMatch
ldy #$00
rts
*--------------------------------------
CS.RUN.toUpper bit bIgnoreCase
bpl .9
cmp #'a'
bcc .9
cmp #'z'+1
bcs .9
eor #$20
.9 rts
*--------------------------------------
CS.QUIT lda hFile
beq .1
>SYSCALL FClose
.1 lda hBuf
beq .8
>SYSCALL FreeMem
.8 clc
rts
*--------------------------------------
CS.DOEVENT sec
rts
*--------------------------------------
CS.END
*--------------------------------------
OptionList .AS "HhIi"
OptionList.Cnt .EQ *-OptionList
*--------------------------------------
MSG.USAGE .AS "Usage : SED [-I] s/pattern/replacement/ <File>\r\n"
.AS " or : CMD|SED [-I] s/pattern/replacement/\r\n"
.AS " -I : Ignore Case"
MSG.CRLF .AZ "\r\n"
*--------------------------------------
.DUMMY
.OR 0
DS.START
DS.END .ED
*--------------------------------------
MAN
SAVE usr/src/bin/sed.s
ASM