mirror of
https://github.com/A2osX/A2osX.git
synced 2024-08-01 00:29:12 +00:00
437 lines
8.0 KiB
Plaintext
437 lines
8.0 KiB
Plaintext
NEW
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AUTO 3,1
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*/--------------------------------------
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* # Expand
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* ## C
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* `char *expand(const char *str, char *expanded);`
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* ## ASM
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* **In:**
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* `>PUSHW str`
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* `>PUSHW expanded`
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* `>SYSCALL expand`
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* ## RETURN VALUE
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* Y,A = PTR to Expanded String
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* X = hMem to Expanded String (C-String)
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*\--------------------------------------
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.DUMMY
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.OR ZPDRV
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ENV.BufLen .BS 1
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ENV.VarEndChar .BS 1
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ENV.bNoExp .BS 1
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ENV.bExp .BS 1
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.ED
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*--------------------------------------
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K.Expand jsr K.strdup
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bcc .1
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rts
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.1 phx Save temp string...
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>STYA TXTPTR
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stz ENV.BufLen init Expanded String len=0
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stz ENV.bExp No var found yet
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stz ENV.bNoExp Reset no expand flag
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.10 lda (TXTPTR) End of CSTR?
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beq .80
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jsr SHARED.TXTPTR.Next
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.11 cmp #'''
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bne .21
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lda ENV.bNoExp
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eor #$ff
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sta ENV.bNoExp toggle flag
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bra .10
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.21 bit ENV.bNoExp
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bpl .23
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.22 jsr ENV.AddAToBuf
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bra .10
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.23 cmp #'$' no, found one ?
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bne .22 no, store...
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ror ENV.bExp Toggle Expanded flag
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lda (TXTPTR)
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bne .30
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lda #'$' End of string, output $
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bra .22
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.30 stz ENV.VarEndChar
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cmp #'{' "${VAR]"?
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bne .31
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dec ENV.VarEndChar "}" expected
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jsr SHARED.TXTPTR.Next skip "{"
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bra .40
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.31 jsr ENV.SysVar 0-9 *#?@$!
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bcs .40
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.35 jsr SHARED.TXTPTR.Next skip $x
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bra .10
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.40 jsr ENV.ExpandStrVar
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bcc .70
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.50 ldy ENV.BufLen
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lda /K.Buf256
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>STYA FORPNT
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jsr K.GetEnv.I
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bcs .70
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ldx ENV.BufLen
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.51 lda K.Buf256,x
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beq .52
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inx
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bra .51
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.52 stx ENV.BufLen
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.70 lda (TXTPTR)
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beq .72
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jsr SHARED.IsIDValid
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bcs .72
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jsr SHARED.TXTPTR.Next
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bra .70
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.72 lda ENV.VarEndChar
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bne .35 skip "}" and loop
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bra .10
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.80 ldx ENV.BufLen
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stz K.Buf256,x
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pla discard temp string
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jsr K.FreeMem
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>LDYAI K.Buf256 dup in case of '' processing
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jsr K.strdup
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bcs .9
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bit ENV.bExp Did we expand something ?
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bpl .9
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jmp .1
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* clc
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.9 rts
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*--------------------------------------
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ENV.SysVar jsr ZP.IsDigit $0 ... $9 ?
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bcs .1
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and #$0f
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jsr K.ArgV
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bcs .8 Arg# is undefined, do not append anything
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jsr ENV.AddYAToBuf
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.8 clc
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rts
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.1 ldx #ENV.SysVars.Cnt-1
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.2 cmp ENV.SysVars,x
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beq .3
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dex
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bpl .2
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sec
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rts
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.3 txa
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beq ENV.SysVarsAllArgs
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ldy ENV.SysVars.PS-1,x
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lda (pPS),y
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*--------------------------------------
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ENV.SysVarsNum jsr MATH.A2STR10NP
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ldy #0
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.1 lda A2osX.NumStrBuf,y
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beq ENV.SysVarsNum.8
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iny
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jsr ENV.AddAToBuf
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bra .1
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ENV.SysVarsNum.8
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clc
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rts
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*--------------------------------------
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ENV.SysVarsAllArgs
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lda #1
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jsr K.ArgV
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bcs ENV.SysVarsNum.8
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>STYA ZPPtr3
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.1 lda (ZPPtr3)
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beq ENV.SysVarsNum.8
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.2 jsr ENV.AddP3ToBuf
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jsr ENV.NextEnvP3
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lda (ZPPtr3)
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beq ENV.SysVarsNum.8
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lda #C.SPACE
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jsr ENV.AddAToBuf
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bra .2
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*--------------------------------------
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ENV.SysVars .AS "*#?@$!"
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ENV.SysVars.Cnt .EQ *-ENV.SysVars
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ENV.SysVars.PS .DA #S.PS.ARGC,#S.PS.RC,#S.PS.PPID,#S.PS.PID,#S.PS.CPID
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*--------------------------------------
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ENV.ExpandStrVar
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>LDYAI ENV.StrVars
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>STYA ZPPtr3
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ldx #0
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.1 lda (ZPPtr3)
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beq .9
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ldy #$ff
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.2 iny
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lda (TXTPTR),y
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beq .3
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jsr SHARED.IsIDValid
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bcs .3
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cmp (ZPPtr3),y
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beq .2
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bra .4
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.3 lda (ZPPtr3),y
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bne .4
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jmp (ENV.StrVarsJmp,x)
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.4 inx
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inx
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jsr ENV.NextEnvP3
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bra .1
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.9 sec
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rts
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*--------------------------------------
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ENV.StrVars .AZ "LOGNAME"
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.AZ "GECOS"
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.AZ "HOME"
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.AZ "SHELL"
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.AZ "PWD"
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.AZ "UID"
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.AZ "GID"
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.DA #0
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*--------------------------------------
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ENV.StrVarsJmp .DA ENV.StrVarsSession
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.DA ENV.StrVarsSession
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.DA ENV.StrVarsSession
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.DA ENV.StrVarsSession
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.DA ENV.StrVarsPWD
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.DA ENV.StrVarsUID
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.DA ENV.StrVarsGID
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*--------------------------------------
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ENV.StrVarsPWD ldy #S.PS.hCWD
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lda (pPS),y
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jsr K.GetMemPtr
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jmp ENV.AddYAToBuf
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*--------------------------------------
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ENV.StrVarsUID ldy #S.SESSION.UID
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.HS 2C
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ENV.StrVarsGID ldy #S.SESSION.GID
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lda (pSession),y
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jmp ENV.SysVarsNum
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ENV.StrVarsSession
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lda pSession
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clc
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adc #S.SESSION.NAME
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sta ZPPtr3
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lda pSession+1
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adc /S.SESSION.NAME
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sta ZPPtr3+1
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.1 dex
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dex
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bmi ENV.AddP3ToBuf
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ldy #$ff
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.2 iny
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lda (ZPPtr3),y
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bne .2
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jsr ENV.NextEnvP3Y
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bra .1
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*--------------------------------------
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ENV.AddYAToBuf >STYA ZPPtr3
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*--------------------------------------
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ENV.AddP3ToBuf ldx ENV.BufLen
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ldy #$ff
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dex
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.1 iny
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inx
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lda (ZPPtr3),y
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sta K.Buf256,x
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bne .1
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stx ENV.BufLen
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rts
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*--------------------------------------
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ENV.AddAToBuf ldx ENV.BufLen
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sta K.Buf256,x
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inc ENV.BufLen
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rts
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*/--------------------------------------
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* # PutEnv
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* Change or add an environment variable, string is 'NAME=VALUE'
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* ## C
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* `int putenv(char *string);`
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* ## ASM
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* **In:**
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* `>PUSHW string`
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* `>SYSCALL putenv`
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* ## RETURN VALUE
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*\--------------------------------------
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K.PutEnv >PULLW TXTPTR NAME=VALUE
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ldy #$ff
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.1 iny
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lda (TXTPTR),y NAME=
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beq .9
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cmp #'='
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bne .1
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tya
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sec skip =
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adc TXTPTR
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sta FORPNT
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lda #0
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adc TXTPTR+1
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sta FORPNT+1
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bra K.SetEnv.I
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.9 lda #E.SYN
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sec
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rts
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*/--------------------------------------
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* # SetEnv
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* Change or add an environment variable
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* ## C
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* `int setenv(const char *name, const char *value);`
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* ## ASM
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* **In:**
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* `>PUSHW name`
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* `>PUSHW value`
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* `>SYSCALL setenv`
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* ## RETURN VALUE
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*\--------------------------------------
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K.SetEnv >PULLW FORPNT value
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>PULLW TXTPTR name
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K.SetEnv.I ldy #S.PS.hENV
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lda (pPs),y
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sta SETREADAUX
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sta SETWRITEAUX
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jsr ENVX.SetEnv
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sta CLRREADAUX
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sta CLRWRITEAUX
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rts
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*/--------------------------------------
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* # GetEnv
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* searches the environment list to find the environment variable name,
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* and returns a pointer to the corresponding value string.
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* ## C
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* `char *getenv(const char *name, char *value);`
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* ## ASM
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* **In:**
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* `>PUSHW name`
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* `>PUSHW value`
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* `>SYSCALL getenv`
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* ## RETURN VALUE
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* CC : Y,A = PTR to VALUE (C-String)
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* CS : not found
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*\--------------------------------------
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K.GetEnv >PULLW FORPNT value
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>PULLW TXTPTR name
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K.GetEnv.I ldy #S.PS.hENV
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lda (pPs),y
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ldy TXTPTR+1
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bne .10
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tax
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jsr MEM.GetMemByID
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sta SETREADAUX
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ldy #S.MEM.LEN
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lda (ZPMemMgrSPtr),y
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pha
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iny
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lda (ZPMemMgrSPtr),y
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ply
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sta CLRREADAUX
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jmp MEM.CopyToMain
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.10 sta SETREADAUX
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sta SETWRITEAUX
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jsr ENVX.GetEnv
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sta CLRREADAUX
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sta CLRWRITEAUX
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rts
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*/--------------------------------------
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* # UnsetEnv
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* Remove an environment variable
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* ## C
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* `int unsetenv(const char *name);`
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* ## ASM
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* **In:**
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* `>PUSHW name`
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* `>SYSCALL unsetenv`
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* ## RETURN VALUE
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*\--------------------------------------
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K.UnsetEnv >PULLW TXTPTR name
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K.UnsetEnv.I ldy #S.PS.hENV
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lda (pPs),y
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sta SETREADAUX
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sta SETWRITEAUX
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jsr ENVX.UnsetEnv
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sta CLRREADAUX
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sta CLRWRITEAUX
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rts
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*--------------------------------------
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ENV.NextEnvP3 jsr ENV.GetP3LenY
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*--------------------------------------
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ENV.NextEnvP3Y tya
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ENV.NextEnvP3A sec
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adc ZPPtr3
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sta ZPPtr3
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bcc .8
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inc ZPPtr3+1
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.8 rts
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*--------------------------------------
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ENV.GetP3LenY ldy #$ff
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.1 iny
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lda (ZPPtr3),y
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bne .1
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rts
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*--------------------------------------
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MAN
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SAVE USR/SRC/SYS/KERNEL.S.ENV
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LOAD USR/SRC/SYS/KERNEL.S
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ASM
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