A2osX/SYS/KERNEL.S.STDLIB.txt

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PR#3
PREFIX /A2OSX.BUILD
LOMEM $A00
INC 1
AUTO 6
*/--------------------------------------
* # StrToF
* Convert String to 40 bits Float
* ## In:
* PUSHW PTR to EndPtr
* PUSHW Source String (C-Sring)
* PUSHW PTR to target buffer (5 bytes)
* ## Out:
* Target buffer filled with a FLOAT (packed)
*\--------------------------------------
K.StrToF jsr K.AToF
>PULLW ZPPtr3
lda TXTPTR
sta (ZPPtr3)
ldy #1
lda TXTPTR+1
sta (ZPPtr3),y
rts
*/--------------------------------------
* # AToF
* Convert String to 40 bits Float
* ## In:
* PUSHW Source String (C-Sring)
* PUSHW PTR to target buffer (5 Bytes)
* ## Out:
*\--------------------------------------
K.AToF >PULLW FORPNT Ptr to dst buffer
>PULLW TXTPTR Ptr to source string
jsr CHARGOT
>ROMCALL FIN
>ROMCALL GETFAC
clc
rts
*/--------------------------------------
* # StrToL
* Convert String to 32 bits int
* ## In:
* PUSHB Base
* PUSHW PTR to EndPtr
* PUSHW Source String (C-Sring)
* PUSHW PTR to target buffer DWORD
* ## Out:
*\--------------------------------------
K.StrToL sec Signed
.HS 90 BCC
*/--------------------------------------
* # StrToUL
* Convert String to 32 bits unsigned int
* ## In:
* PUSHB Base
* PUSHW PTR to EndPtr
* PUSHW Source String (C-Sring)
* PUSHW PTR to target buffer DWORD
* ## Out:
*\--------------------------------------
K.StrToUL clc Unsigned
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jsr PullP1P2P3
>PULLA Base
jsr K.AToL.I
bcs K.StrToUL.rts
* clc
K.StrToUL.Exit adc ZPPtr2
sta (ZPPtr3)
lda #0
adc ZPPtr2+1
ldy #1
sta (ZPPtr3),y
K.StrToUL.rts rts
*/--------------------------------------
* # AToL
* Convert String to 32 bits int
* ## In:
* PUSHW Source String (C-Sring)
* PUSHW PTR to target buffer DWORD
* ## Out:
*\--------------------------------------
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K.AToL jsr PullP1P2 C-String in Ptr2, Dst buffer in Ptr1
lda #10 base 10
sec signed
K.AToL.I jsr STDLIB.Dec2Hex
bcs .9
phy Save Count processed
ldy #3
.3 lda STDLIB.32,y
sta (ZPPtr1),y
dey
bpl .3
pla
* clc
.9 rts
*/--------------------------------------
* # AToI.YA
* Convert String to 16 bits int
* ## In:
* Y,A = Source String (C-String)
* ## Out:
* Y,A = Int
*\--------------------------------------
K.AToI.YA >STYA ZPPtr2
lda #10 base 10
sec signed
jsr STDLIB.Dec2Hex
bcs .9
>LDYA STDLIB.32
.9 rts
*--------------------------------------
* Convert ZPPtr1 to STDLIB.32
*--------------------------------------
STDLIB.Dec2Hex jsr STDLIB.32.Clear
ldy #$ff
.1 iny
lda (ZPPtr2),y
beq .8
jsr STDIO.IsDigit
bcs .8
phy Save Y, pointing to next char
jsr STDLIB.32.T10
ply
bcs .9
lda (ZPPtr2),y
and #$0F
adc STDLIB.32
sta STDLIB.32
bcc .1
inc STDLIB.32+1
bne .1
inc STDLIB.32+2
bne .1
inc STDLIB.32+3
bne .1 overflow!!!
* sec
rts
.8 clc
.9 rts
*--------------------------------------
STDLIB.32.T10 ldx #3
.1 lda STDLIB.32,x save STDLIB.32 for 4+1
pha
dex
bpl .1
jsr STDLIB.32.ROL STDLIB.32 * 2 -> STDLIB.32
bcs .9 overflow!!!
jsr STDLIB.32.ROL STDLIB.32 * 4 -> STDLIB.32
bcs .9 overflow!!!
ldx #0
ldy #4
* clc
.2 pla STDLIB.32 * 4 + STDLIB.32 -> STDLIB.32
adc STDLIB.32,x
sta STDLIB.32,x
inx
dey
bne .2
bcs .99 overflow!!!
jsr STDLIB.32.ROL STDLIB.32 * 10 -> STDLIB.32
rts if CS, overflow!!!
.9 pla discard saved STDLIB.32
pla
pla
pla
.99 rts
*--------------------------------------
STDLIB.32.ROL asl STDLIB.32
rol STDLIB.32+1
rol STDLIB.32+2
rol STDLIB.32+3
rts
*--------------------------------------
STDLIB.32.Clear ldx #3
.1 stz STDLIB.32,x
dex
bpl .1
rts
*--------------------------------------
STDLIB.32 .BS 4 32 bits max
*/--------------------------------------
* # RealPath.YA
* Return the canonicalized absolute pathname
* ## In :
* Y,A = Ptr to Relative Filename (C-String)
* ## Out :
* CC : success
* Y,A = Ptr to Full Path (C-String)
* X = hMem of Full Path
* CS : A = Error Code
*\--------------------------------------
K.RealPath.YA >STYA ZPPtr1
ldx #$ff
lda (ZPPtr1)
beq .1
cmp #'/' full path starting with '/'?
beq .3 yes, do not append to current prefix
.1 ldy #S.PS.hPREFIX
lda (pPs),y
jsr K.GetMemPtr.A
>STYA ZPPtr2
ldy #$ff
.2 iny
inx
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lda (ZPPtr2),y
sta K.Buf256,x
bne .2
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dex
.3 ldy #$ff
.4 iny
inx
lda (ZPPtr1),y
sta K.Buf256,x
bne .4
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*--------------------------------------
* X=LEN, K.Buf256 = /dir1../file(/) /x0
dex
beq .89 we have '/'....nothing to do...
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lda K.Buf256,x Skip any / at the end of string....
cmp #'/'
bne .5
dex
.5 ldy #0 dot counter=0
.6 lda K.Buf256,x
cmp #'/'
beq .8
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cmp #'.'
bne .7
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iny
.HS 2C BIT ABS, skip "LDY #0"
.7 ldy #0 not a dot....reset dot counter
txa
beq .89
dex
bra .6 always, should end with a '/'
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.8 tya
beq .80 Y was 0....nothing to do...
dey "/." ?
bne .9 no..
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jsr K.RealPath.RemoveAtX we found "/.", remove,useless....
bra .80
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.9 dey "/.." ?
bne .90 "/..." ??!!...mmm...syntax error
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txa we found "/.."
beq .90 at the beginning of string...cannot remove /dir/..
jsr K.RealPath.RemoveAtX remove "/.."
.10 dex
lda K.Buf256,x go to "/dir"
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cmp #'/'
bne .10
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jsr K.RealPath.RemoveAtX ...remove "/dir"
.80 txa
beq .89 Empty path!!! go put back "/" an exit
dex
bra .5
.89 >LDYAI K.Buf256
jmp K.NewStr.YA
.90 lda #K.E.SYN
sec
rts
*--------------------------------------
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K.RealPath.RemoveAtX
txa X = "/something"
tay
.1 iny
lda K.Buf256,y
beq .2
cmp #'/'
bne .1
.2 phx
.3 lda K.Buf256,y
sta K.Buf256,x
beq .4
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iny
inx
bne .3
.4 txa
bne .8
lda #'/' Make sure we have a least '/' in the buffer
sta K.Buf256
stz K.Buf256+1
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.8 plx
rts
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.STDLIB
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM