A2osX/SYS/KERNEL.S.STDLIB.txt
2020-01-17 12:23:11 +01:00

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NEW
AUTO 3,1
*/--------------------------------------
* # 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 pha
>PULLW ZPPtr1
pla
jsr K.AToF
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
lda pStack
sec
sbc #5
sta pStack
jsr CHARGOT
ldx #FPU.FIN
jmp GP.RomCallGetFacOnStack
*/--------------------------------------
* # 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
jsr SHARED.SPtr2PPtr1
>PULLA Base
jsr K.AToL.I
bcs K.StrToUL.rts
* clc
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)
*\--------------------------------------
K.AToL >STYA ZPPtr2 C-String in Ptr2, Dst buffer in Ptr1
* lda #10 base 10
sec signed
K.AToL.I jsr MATH.Dec2ACC32
bcs .9
ldx #3
.3 lda ACC32,x
>PUSHA
dex
bpl .3
tya Y = A = Count processed
* 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 MATH.Dec2ACC32
bcs .9
>LDYA ACC32
.9
K.atoi.RTS rts
*/--------------------------------------
* # RealPath
* Return the canonicalized absolute pathname
* ## C
* `unsigned short int realpath (const char* str, char *resolvedpath);`
* ## ASM
* **In:**
* `>PUSHWI resolvedpath`
* `>LDYA str`
* `>SYSCALL realpath`
* ## RETURN VALUE
* CC : success
* Y,A = Ptr to Full Path (C-String Buffer, MLI.MAXPATH+1)
* X = hMem of Full Path
* CS : A = Error Code
*\--------------------------------------
K.realpath sec
.HS 90 BCC
STDLIB.realpath.I
clc
ror .82+1
>SYSCALL2 expand
bcs K.atoi.RTS
>STYA ZPPtr1
stx .99+1 save expanded buffer hMem
ldx #$ff
lda (ZPPtr1)
cmp #'/' full path starting with '/'?
beq .3 yes, do not append to current prefix
.1 ldy #S.PS.hCWD
lda (pPs),y
jsr K.GetMemPtr
>STYA ZPPtr2
ldy #$ff
.2 iny
inx
lda (ZPPtr2),y
sta K.Buf256,x
bne .2
dex
.3 ldy #$ff
.4 iny
inx
lda (ZPPtr1),y
sta K.Buf256,x
bne .4
dex
beq .81 we have '/'....nothing to do...
*--------------------------------------
* X=LEN, K.Buf256 = /dir1/./../file(/)\0
*--------------------------------------
ldx #0 will skip leading /
.5 ldy #0 reset dot counter=0
.6 inx
lda K.Buf256,x
beq .8
.7 cmp #'/'
beq .8
cmp #'.'
bne .5
iny
bra .6
.8 tya
beq .80 Y was 0....nothing to do...
dey one dot ?
bne .9 no..
dex
dex
jsr K.RealPath.RemoveAtX we found "/.", remove,useless....
bra .80
.9 dey "/.." ?
bne .99 "/..." ??!!...syntax error
dex
dex
dex
txa we found "/.."
beq .99 at the beginning of string...cannot remove /dir/..
jsr K.RealPath.RemoveAtX remove "/.."
.10 dex
lda K.Buf256,x go to "/dir"
cmp #'/'
bne .10
jsr K.RealPath.RemoveAtX ...remove "/dir"
.80 lda K.Buf256,x was / or \0 ?
bne .5
*--------------------------------------
.81 jsr .99
.82 lda #$ff SELF MODIFIED
bpl .88
>LDYAI MLI.MAXPATH+1
jsr K.getmem
bcs .90
>STYA ZPPtr1
ldy #$ff
.83 iny
lda K.Buf256,y
sta (ZPPtr1),y
bne .83
>LDYA ZPPtr1
.88 clc
rts
.99 lda #$ff SELF MODIFIED
jsr K.FreeMem
lda #E.BADPATH
sec
.90 rts
*--------------------------------------
K.RealPath.RemoveAtX
txa X = "/something"
tay
.1 iny
lda K.Buf256,y
beq .2 found /something\0
cmp #'/'
bne .1 found /something/
.2 phx save X for exit
.3 iny K.Buf256,y=/ or 0
inx
lda K.Buf256-1,y
sta K.Buf256-1,x
bne .3
txa
bne .8
lda #'/' Make sure we have a least '/' in the buffer
sta K.Buf256
stz K.Buf256+1
.8 plx restore X
rts
*--------------------------------------
MAN
SAVE USR/SRC/SYS/KERNEL.S.STDLIB
LOAD USR/SRC/SYS/KERNEL.S
ASM