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A2osX/SYS/KERNEL.S.ENV.txt
Rémy GIBERT 3e17ac840c Kernel Rewrite #6
2016-06-07 08:10:18 +02:00

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PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
.LIST OFF
*--------------------------------------
* S.ExpandPStrA
* In:
* A = hMem of String to Expand (PSTRING)
* Out:
* A = hMem to Expanded String (PSTRING)
*--------------------------------------
S.ExpandPStrA jsr S.GetMemPtrA
S.ExpandPStrYA >STYA ZPQuickPtr3
stz TmpBuffer256 init Expanded String len=0
ldy #0
.10 stz S.ExpandPStrA.Start
.1 tya
cmp (ZPQuickPtr3) End of PSTR?
beq .6
iny
lda (ZPQuickPtr3),y
ldx S.ExpandPStrA.Start
bne .3 already in a var?
cmp #'$' no, found one ?
beq .2
inc TmpBuffer256 no, copy char
ldx TmpBuffer256
sta TmpBuffer256,x
bra .1
.2 sty S.ExpandPStrA.Start save var start
stz S.ExpandPStrA.End
bra .1 skip this char
.3 cmp #'{' in var, "{" after "$"?
beq .2
cmp #'}' end of var?
beq .5
.4 jsr S.ExpandPStrA.VC valid char ?
bcs .5 no, end here
sty S.ExpandPStrA.End yes, save end
bra .1
.5 lda S.ExpandPStrA.End get end
beq .1 empty {} or $/
phy save current index
jsr S.ExpandPStrA.AV
ply restore index in string...
bra .10 reset start flag and continue
.6 sty S.ExpandPStrA.End end of PSTR
lda S.ExpandPStrA.Start are we in a var?
beq .7 no...exit...
jsr S.ExpandPStrA.AV yes, expand and add to STR
.7 >LDYAI TmpBuffer256
jsr S.NewPStrYA
rts
*--------------------------------------
S.ExpandPStrA.AV
ldy #S.PS.hENV
lda (pPs),y
jsr S.GetMemPtrA
>STYA ZPQuickPtr1 Store ENV for FindVar
lda S.ExpandPStrA.End
sec
sbc S.ExpandPStrA.Start compute len of VAR End-Start+1
ldx TmpBuffer256
inx
sta TmpBuffer256,x
stx ZPQuickPtr2
lda /TmpBuffer256
sta ZPQuickPtr2+1
ldy S.ExpandPStrA.Start
.1 iny
inx
lda (ZPQuickPtr3),y
sta TmpBuffer256,x
cpy S.ExpandPStrA.End
bne .1
jsr S.FindVar
bcs .9
ldy #0
.2 iny
lda (ZPQuickPtr1),y
cmp #'='
bne .2
.3 iny
lda (ZPQuickPtr1),y
inc TmpBuffer256
ldx TmpBuffer256
sta TmpBuffer256,x
tya
cmp (ZPQuickPtr1) last char?
bne .3
.9 rts
*--------------------------------------
S.ExpandPStrA.VC
cmp #'0'
bcc .9
cmp #'9'+1
bcc .8
cmp #'A'
bcc .9
cmp #'Z'+1
bcc .8
cmp #'_'
bne .9
.8 clc
rts
.9 sec
rts
*--------------------------------------
S.ExpandPStrA.Start .BS 1
S.ExpandPStrA.End .BS 1
*--------------------------------------
* S.DupEnvA
* In:
* A = ENV hMem To Duplicate
* Out:
* A = hMem to new ENV
*--------------------------------------
S.DupEnvA jsr S.GetMemPtrA
>STYA ZPQuickPtr1
>PUSHWI K.ENV.SIZE
>PUSHBI 0
jsr S.GetMem
bcs .9
>STYA ZPQuickPtr2
ldy #0
.1 lda (ZPQuickPtr1),y
sta (ZPQuickPtr2),y
beq .8
iny
bne .1
inc ZPQuickPtr1+1
inc ZPQuickPtr2+1
bra .1
.8 txa
clc
.9 rts
*--------------------------------------
* S.GetEnvVarYA
* In:
* Y,A = PTR to NAME (PSTRING)
* Out:
* A = hMem to VALUE (PSTRING) 0,"" if not exist
*--------------------------------------
S.GetEnvVarYA >STYA ZPQuickPtr2
jsr S.FindVar
bcc .1
>LDYAI 1 not found
>PUSHYA create "" PSTR
>PUSHBI 0
jsr S.GetMem create a new PSTR
bcs .99
>STYA ZPQuickPtr3
lda #0
sta (ZPQuickPtr3) set len of PSTR
txa
clc
rts
.1 lda (ZPQuickPtr1) get NAME=VALUE len
sec
sbc (ZPQuickPtr2) substract (NAME len)
tay y=len("=VALUE")
lda #0
>PUSHYA
>PUSHBI 0
jsr S.GetMem create a new PSTR
bcs .99
>STYA ZPQuickPtr3
phx save hMem
lda (ZPQuickPtr1) get NAME=VALUE len
clc
sbc (ZPQuickPtr2) compute VALUE len
sta (ZPQuickPtr3) set new PSTR Len
tax x = chr to copy
lda (ZPQuickPtr2) get name len
inc add 1 to skip "="
tay
.2 iny
inc ZPQuickPtr3
bne .3
inc ZPQuickPtr3+1
.3 lda (ZPQuickPtr1),y
sta (ZPQuickPtr3)
dex
bne .2
pla get back PSTR hMem
clc
.99 rts
*--------------------------------------
* S.SetEnvVarH
* In:
* PULLB = hMem To Name (PSTRING)
* PULLB = hMem To Value (PSTRING)
*--------------------------------------
* S.SetEnvVarP
* In:
* PULLW = PTR To Name (PSTRING)
* PULLW = PTR To Value (PSTRING)
* Out:
*--------------------------------------
S.SetEnvVarH >PULLA
jsr S.GetMemPtrA
>STYA ZPQuickPtr2
>PULLA
jsr S.GetMemPtrA
bra S.SetEnvVar
S.SetEnvVarP >PULLW ZPQuickPtr2
>PULLYA
S.SetEnvVar >STYA ZPQuickPtr3 ZPQuickPtr3 = VALUE
jsr S.FindVar
bcs .3 Not Found,ZPQuickPtr1 -> End Of Env
lda (ZPQuickPtr1) Found, Discard current NAME definition
sec
adc ZPQuickPtr1 add NAME=VALUE len+1 to ZPQuickPtr1
sta ZPQuickPtr4
lda #0
adc ZPQuickPtr1+1 store it in ZPQuickPtr4
sta ZPQuickPtr4+1
.1 lda (ZPQuickPtr4)
sta (ZPQuickPtr1)
beq .3 until we move ending 0
inc ZPQuickPtr1
bne .2
inc ZPQuickPtr1+1
.2 inc ZPQuickPtr4
bne .1
inc ZPQuickPtr4+1
bra .1
.3 lda ZPQuickPtr1 Compute ENV UPPER LIMIT
clc
adc #K.ENV.SIZE
sta ZPQuickPtr4
lda ZPQuickPtr1+1
adc /K.ENV.SIZE
sta ZPQuickPtr4+1
ldy ZPQuickPtr1+1
lda ZPQuickPtr1 Compute New Env Upper limit in A,Y
sec
adc (ZPQuickPtr2) add NAME len +1(for len)
bcc .4
iny
.4 sec
adc (ZPQuickPtr3) add VALUE len +1(for "=")
bcc .5
iny
.5 sec A,Y=new upper limit
sbc ZPQuickPtr4 greater than hMem Upper limit ?
bcc .51
tya
sbc ZPQuickPtr4+1
bcs .99
.51 lda (ZPQuickPtr2) make len = NAME+VALUE+1
sec
adc (ZPQuickPtr3)
sta (ZPQuickPtr1)
inc ZPQuickPtr1
bne .6
inc ZPQuickPtr1+1
.6 ldy #0
.7 iny
lda (ZPQuickPtr2),y
sta (ZPQuickPtr1)
inc ZPQuickPtr1
bne .8
inc ZPQuickPtr1+1
.8 tya
cmp (ZPQuickPtr2)
bne .7
lda #'='
sta (ZPQuickPtr1)
inc ZPQuickPtr1
bne .9
inc ZPQuickPtr1+1
.9 ldy #0
.10 iny
lda (ZPQuickPtr3),y
sta (ZPQuickPtr1)
inc ZPQuickPtr1
bne .11
inc ZPQuickPtr1+1
.11 tya
cmp (ZPQuickPtr3)
bne .10
lda #0
sta (ZPQuickPtr1)
clc
rts
.99 lda #SYSMGR.ERRENVF
sec
rts
*--------------------------------------
* S.PutEnvYA
* In:
* Y,A = PTR To Name (NAME=VALUE)
* Out:
*--------------------------------------
S.PutEnvYA clc
rts
*--------------------------------------
* S.DelEnvVarA
* In:
* PULLB = hMem To Name (PSTRING)
*--------------------------------------
* S.DelEnvVarYA
* In:
* PULLW = PTR To Name (PSTRING)
* Out:
*--------------------------------------
S.DelEnvVarA >PULLA get NAME
jsr S.GetMemPtrA
S.DelEnvVarYA >STYA ZPQuickPtr2 Store VAR Name
S.DelEnvVar jsr S.FindVar
bcs .8 not found, quit
lda (ZPQuickPtr1) Found, Discard current NAME definition
sec
adc ZPQuickPtr1 add NAME=VALUE len+1 to ZPQuickPtr1
sta ZPQuickPtr4
lda #0
adc ZPQuickPtr1+1 store it in ZPQuickPtr4
sta ZPQuickPtr4+1
.1 lda (ZPQuickPtr4)
sta (ZPQuickPtr1)
beq .8 until we move ending 0
inc ZPQuickPtr1
bne .2
inc ZPQuickPtr1+1
.2 inc ZPQuickPtr4
bne .1
inc ZPQuickPtr4+1
bra .1
.8 clc
rts
*--------------------------------------
* PRIVATE
*--------------------------------------
* S.FindVar
* In:
* ZPQuickPtr2 -> NAME
*--------------------------------------
* Out:
* CC: Found
* ZPQuickPtr1 -> NAME=VALUE
* ZPQuickPtr2 -> NAME
* CS: Not Found
* ZPQuickPtr1 -> PTR to Ending 0
* ZPQuickPtr2 -> NAME
*--------------------------------------
S.FindVar ldy #S.PS.hENV
lda (pPs),y
jsr S.GetMemPtrA
>STYA ZPQuickPtr1 Store ENV
.1 lda (ZPQuickPtr1)
beq .9
ldy #0
.2 iny
lda (ZPQuickPtr1),y
cmp #'=' End Of VAR Name ?
beq .4
.3 cmp (ZPQuickPtr2),y
bne .7
tya
cmp (ZPQuickPtr2)
bne .2
iny
lda (ZPQuickPtr1),y
cmp #'=' End Of VAR Name ?
bne .3
.4 dey
tya
cmp (ZPQuickPtr2) Y = VAR Name Len ?
beq .8 yes, found VAR
.7 lda (ZPQuickPtr1) no, go to next NAME=VALUE
sec
adc ZPQuickPtr1
sta ZPQuickPtr1
bcc .1
inc ZPQuickPtr1+1
bra .1
.8 clc
rts
.9 sec
rts
*--------------------------------------
MAN
SAVE SYS/KERNEL.S.ENV
LOAD SYS/KERNEL.S
ASM
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