A2osX/SYS/KERNEL.S.STDLIB.txt
2018-10-21 22:54:07 +02:00

426 lines
7.7 KiB
Plaintext
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

NEW
PREFIX /A2OSX.BUILD
AUTO 4,1
*/--------------------------------------
* # strtof
* Convert String to 40 bits Float
* ## C
* `float strtof (const char* str, char** endptr);`
* ## ASM
* **In:**
* `>PUSHWI EndPtr`
* `>LDYA str`
* `>SYSCALL strtof`
* ## RETURN VALUE
* On stack (float)
*\--------------------------------------
K.strtof >STYA TXTPTR Ptr to source string
>PULLW ZPPtr1
jsr K.AToF.I
lda TXTPTR
sta (ZPPtr1)
ldy #1
lda TXTPTR+1
sta (ZPPtr1),y
rts
*/--------------------------------------
* # AToF
* Convert String to 40 bits Float
* ## C
* `float atof (const char* str);`
* ## ASM
* **In:**
* `>LDYA str`
* `>SYSCALL atof`
* ## RETURN VALUE
* On stack (float)
*\--------------------------------------
K.AToF >STYA TXTPTR Ptr to source string
K.AToF.I jsr CHARGOT
ldx #ROM.FIN
**** DUP code in MATH.Go ****
jsr GP.ROMCALL
lda pStack
sec
sbc #5
sta pStack
sta FORPNT Ptr to dst buffer
lda pStack+1
sta FORPNT+1
ldx #ROM.GETFAC
jsr GP.ROMCALL
clc
rts
*/--------------------------------------
* # StrToL/StrToUL
* Convert String to 32 bits (unsigned) int
* ## C
* `long strtol (const char* str, char** endptr, int base);`
* `unsigned long strtoul (const char* str, char** endptr, int base);`
* ## ASM
* **In:**
* `>PUSHB Base`
* `>PUSHWI EndPtr`
* `>LDYAI str`
* `>SYSCALL strtol`
* ## RETURN VALUE
* On stack (long)
*\--------------------------------------
K.StrToL sec Signed
.HS 90 BCC
K.StrToUL clc Unsigned
>STYA ZPPtr2
>PULLW ZPPtr1
>PULLA Base
jsr K.AToL.I
bcs K.StrToUL.rts
* clc
K.StrToUL.Exit adc ZPPtr2
sta (ZPPtr1)
lda #0
adc ZPPtr2+1
ldy #1
sta (ZPPtr1),y
K.StrToUL.rts rts
*/--------------------------------------
* # atol
* Convert String to 32 bits long
* ## C
* `long atol ( const char * str );`
* ## ASM
* **In:**
* `>LDYA str`
* `>SYSCALL atol`
* ## RETURN VALUE
* On stack (long)
*\--------------------------------------
*STDLIB.32 .BS 4 32 bits max
STDLIB.32 .EQ FAC 32 bits max
*--------------------------------------
K.AToL >STYA ZPPtr2 C-String in Ptr2, Dst buffer in Ptr1
lda #10 base 10
sec signed
K.AToL.I jsr STDLIB.GetDec
bcs .9
phy Save Count processed
ldy #3
.3 lda STDLIB.32,y
>PUSHA
dey
bpl .3
pla
* clc
.9 rts
*/--------------------------------------
* # atoi
* Convert String to 16 bits int
* ## C
* `int atoi ( const char * str );`
* ## ASM
* **In:**
* `>LDYAI str`
* `>SYSCALL atoi`
* ## RETURN VALUE
* Y,A = int
*\--------------------------------------
K.atoi >STYA ZPPtr2
lda #10 base 10
sec signed
jsr STDLIB.GetDec
bcs .9
>LDYA STDLIB.32
.9 rts
*--------------------------------------
* Convert Hex int at ZPPtr2 to STDLIB.32
*--------------------------------------
STDLIB.GetHex lda (ZPPtr2)
beq .9
jsr MEM.IsHexDigit
bcs .9
jsr STDLIB.32.Clear
sta STDLIB.32
ldy #$ff
.1 iny
lda (ZPPtr2),y
beq .8
jsr MEM.IsHexDigit
bcs .8
pha
ldx #4
.2 jsr STDLIB.32.T2
bcs .99 overflow!!!
dex
bne .2
pla
ora STDLIB.32
sta STDLIB.32
bra .1
.8 clc
rts
.99 pla
.9 sec
rts
*--------------------------------------
* Convert Decimal int at ZPPtr2 to STDLIB.32
*--------------------------------------
STDLIB.GetDec jsr STDLIB.32.Clear
ldy #$ff
.1 iny
lda (ZPPtr2),y
beq .8
jsr MEM.IsDigit
bcs .8
phy Save Y, pointing to next char
jsr STDLIB.32.T10
ply
bcs .9
lda (ZPPtr2),y
and #$0F
* clc
adc STDLIB.32
sta STDLIB.32
bcc .1
inc STDLIB.32+1
bne .1
inc STDLIB.32+2
bne .1
inc STDLIB.32+3
bne .1 overflow!!!
* sec
rts
.8 clc
.9 rts
*--------------------------------------
STDLIB.32.T10 ldx #3
.1 lda STDLIB.32,x save STDLIB.32 for 4+1
pha
dex
bpl .1
jsr STDLIB.32.T2 STDLIB.32 * 2 -> STDLIB.32
bcs STDLIB.32.9 overflow!!!
jsr STDLIB.32.T2 STDLIB.32 * 4 -> STDLIB.32
bcs STDLIB.32.9 overflow!!!
ldx #0
ldy #4
* clc
.2 pla STDLIB.32 * 4 + STDLIB.32 -> STDLIB.32
adc STDLIB.32,x
sta STDLIB.32,x
inx
dey
bne .2
bcs STDLIB.32.RTS overflow!!!
* STDLIB.32 * 2 -> STDLIB.32
STDLIB.32.T2 asl STDLIB.32
rol STDLIB.32+1
rol STDLIB.32+2
rol STDLIB.32+3
rts if CS, overflow!!!
STDLIB.32.9 pla discard saved STDLIB.32
pla
pla
pla
STDLIB.32.RTS rts
*--------------------------------------
STDLIB.32.Clear ldx #3
.1 stz STDLIB.32,x
dex
bpl .1
rts
*/--------------------------------------
* # RealPath
* Return the canonicalized absolute pathname
* ## C
* `unsigned short int realpath (const char* str);`
* ## ASM
* **In:**
* `>LDYA str`
* `>SYSCALL realpath`
* ## RETURN VALUE
* CC : success
* Y,A = Ptr to Full Path (C-String)
* X = hMem of Full Path
* CS : A = Error Code
*\--------------------------------------
K.realpath >STYA ZPPtr1
ldx #$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
>STYA ZPPtr2
ldy #$ff
.2 iny
inx
lda (ZPPtr2),y
sta K.Buf256,x
bne .2
dex
.3 ldy #$ff
.4 iny
inx
lda (ZPPtr1),y
sta K.Buf256,x
bne .4
*--------------------------------------
* X=LEN, K.Buf256 = /dir1../file(/) /x0
dex
beq .89 we have '/'....nothing to do...
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
cmp #'.'
bne .7
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 '/'
.8 tya
beq .80 Y was 0....nothing to do...
dey "/." ?
bne .9 no..
jsr K.RealPath.RemoveAtX we found "/.", remove,useless....
bra .80
.9 dey "/.." ?
bne .90 "/..." ??!!...mmm...syntax error
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"
cmp #'/'
bne .10
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
.90 lda #E.SYN
sec
rts
*--------------------------------------
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
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
.8 plx
rts
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.STDLIB
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM