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Working version of SED! Except it can't handle spaces in pattern.

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This commit is contained in:
Bobbi Webber-Manners 2021-06-19 23:05:46 -04:00
parent 5bdd831d51
commit e6fba6a648
1 changed files with 66 additions and 2 deletions
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68
BIN/SED.S.TXT
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@ -21,6 +21,8 @@ hFile .BS 1
hBuf .BS 1
LineNum .BS 2
char .BS 1
delimiter .BS 1
replaceidx .BS 1
bIgnoreCase .BS 1
@ -100,6 +102,8 @@ CS.RUN.CheckArgs
sta ArgPattern
>LDYA ZPPtr1
>STYA ZPPatternPtr
jsr CS.RUN.SEDParser
bcs .97
bra CS.RUN.CheckArgs
.11 lda hFile
@ -185,6 +189,54 @@ CS.RUN.NextArg inc ArgIndex
.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
@ -209,10 +261,12 @@ CS.RUN.PRINT >LDYA ZPBufPtr
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
@ -241,10 +295,19 @@ CS.RUN.PRINT >LDYA ZPBufPtr
clc
rts
*--------------------------------------
CS.RUN.GotMatch lda #'*' TODO ...
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
@ -302,7 +365,8 @@ CS.END
OptionList .AS "HhIi"
OptionList.Cnt .EQ *-OptionList
*--------------------------------------
MSG.USAGE .AS "Usage : SED <pattern> <File> or CMD|SED <pattern>\r\n"
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"
*--------------------------------------