mirror of
https://github.com/A2osX/A2osX.git
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338 lines
5.9 KiB
Plaintext
338 lines
5.9 KiB
Plaintext
PR#3
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PREFIX /A2OSX.BUILD
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LOMEM $A00
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INC 1
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AUTO 6
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*/--------------------------------------
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* # AToF
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* Convert String to 40 bits Float
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* ## In:
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* PUSHW PTR to target buffer (5 Bytes)
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* PUSHW Source String (PSTR)
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* ## Out:
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*\--------------------------------------
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K.AToF
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*/--------------------------------------
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* # AToI.YA
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* Convert String to 16 bits int
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* ## In:
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* Y,A = Source String (C-String)
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* ## Out:
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* Y,A = Int
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*\--------------------------------------
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K.AToI.YA
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*/--------------------------------------
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* # AToL
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* Convert String to 32 bits int
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* ## In:
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* PUSHW PTR to target buffer DWORD
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* PUSHW Source String (C-Sring)
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* ## Out:
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*\--------------------------------------
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K.AToL jsr PullPtr1Ptr2 PSTR in Ptr1,buffer in Ptr2
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stz ASCBUF
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ldx #0
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lda (ZPPtr1)
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beq .2
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ldy #$ff
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.1 iny
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lda (ZPPtr1),y
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beq .2
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cmp #'0'
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bcc .2
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cmp #'9'+1
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bcs .2
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sta ASCBUF,x
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inx
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cpx #10
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bne .1
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.2 stz ASCBUF,x
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jsr DEC2HEX
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ldy #3
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.3 lda HEXBUF,y
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sta (ZPPtr2),y
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dey
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bpl .3
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clc
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rts
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*--------------------------------------
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* Convert HEXBUF to ASCBUF decimal padded with 0
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*--------------------------------------
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HEX2DEC ldx #4
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.1 stz BCDBUF,x Clear all 5 bytes
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dex
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bpl .1
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sed switch to BCD mode
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ldx #32 let's roll 32 bits
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.2 jsr HEXBUF.ROL
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ldy #4
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.3 lda BCDBUF,y
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adc BCDBUF,y
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sta BCDBUF,y
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dey
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bpl .3
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dex
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bne .2
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cld
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ldy #4
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ldx #9
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.4 lda BCDBUF,y
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pha
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and #$0F
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ora #$30
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sta ASCBUF,x
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dex
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pla
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lsr
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lsr
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lsr
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lsr
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ora #$30
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sta ASCBUF,x
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dey
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dex
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bpl .4
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rts
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*--------------------------------------
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* Convert ASCBUF decimal to HEXBUF
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*--------------------------------------
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DEC2HEX stz HEXBUF
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stz HEXBUF+1
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stz HEXBUF+2
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stz HEXBUF+3
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lda ASCBUF
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beq .8
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ldx #0
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.1 lda HEXBUF+3 save HEXBUF for 4+1
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pha
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lda HEXBUF+2
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pha
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lda HEXBUF+1
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pha
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lda HEXBUF
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pha
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jsr HEXBUF.ROL HEXBUF * 2 -> HEXBUF
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* bcs .9 overflow!!!
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jsr HEXBUF.ROL HEXBUF * 4 -> HEXBUF
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* bcs .9 overflow!!!
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pla HEXBUF * 4 + HEXBUF -> HEXBUF
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adc HEXBUF
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sta HEXBUF
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pla
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adc HEXBUF+1
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sta HEXBUF+1
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pla
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adc HEXBUF+2
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sta HEXBUF+2
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pla
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adc HEXBUF+3
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sta HEXBUF+3
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* bcs .99 overflow!!!
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jsr HEXBUF.ROL HEXBUF * 10 -> HEXBUF
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* bcs .99 overflow!!!
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inx
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lda ASCBUF,x
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and #$0F
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adc HEXBUF
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sta HEXBUF
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bcc .2
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inc HEXBUF+1
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bne .2
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inc HEXBUF+2
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bne .2
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inc HEXBUF+3
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.2 cpx ASCBUF
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bne .1
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.8 rts
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*.9 pla discard saved HEXBUF
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* pla
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* pla
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* pla
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*.99 rts
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*--------------------------------------
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HEXBUF.ROL asl HEXBUF
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rol HEXBUF+1
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rol HEXBUF+2
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rol HEXBUF+3
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rts
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*--------------------------------------
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HEXBUF .BS 4 32 bits max
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BCDBUF .BS 5 5, enough to handle 10 digits (32bits)
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ASCBUF .BS 12 LEN + sign + 10 digits ($FFFFFFFF=4.294.967.295)
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*/--------------------------------------
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* # RealPath.YA
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* Return the canonicalized absolute pathname
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* ## In :
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* Y,A = Ptr to Relative Filename (C-String)
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* ## Out :
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* CC : success
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* Y,A = Ptr to Full Path (C-String)
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* X = hMem of Full Path
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* CS : A = Error Code
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*\--------------------------------------
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K.RealPath.YA >STYA ZPPtr1
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ldx #$ff
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lda (ZPPtr1)
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beq .1
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cmp #'/' full path starting with '/'?
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beq .3 yes, do not append to current prefix
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.1 ldy #S.PS.hPREFIX
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lda (pPs),y
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jsr K.GetMemPtr.A
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>STYA ZPPtr2
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ldy #$ff
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.2 iny
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inx
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lda (ZPPtr2),y
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sta K.Buf256,x
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bne .2
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dex
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.3 ldy #$ff
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.4 iny
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inx
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lda (ZPPtr1),y
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sta K.Buf256,x
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bne .4
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*--------------------------------------
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* X=LEN, K.Buf256 = /dir1../file(/) /x0
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dex
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beq .89 we have '/'....nothing to do...
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lda K.Buf256,x Skip any / at the end of string....
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cmp #'/'
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bne .5
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dex
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.5 ldy #0 dot counter=0
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.6 lda K.Buf256,x
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cmp #'/'
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beq .8
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cmp #'.'
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bne .7
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iny
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.HS 2C BIT ABS, skip "LDY #0"
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.7 ldy #0 not a dot....reset dot counter
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txa
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beq .89
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dex
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bra .6 always, should end with a '/'
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.8 tya
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beq .80 Y was 0....nothing to do...
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dey "/." ?
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bne .9 no..
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jsr K.RealPath.RemoveAtX we found "/.", remove,useless....
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bra .80
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.9 dey "/.." ?
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bne .90 "/..." ??!!...mmm...syntax error
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txa we found "/.."
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beq .90 at the beginning of string...cannot remove /dir/..
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jsr K.RealPath.RemoveAtX remove "/.."
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.10 dex
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lda K.Buf256,x go to "/dir"
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cmp #'/'
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bne .10
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jsr K.RealPath.RemoveAtX ...remove "/dir"
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.80 txa
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beq .89 Empty path!!! go put back "/" an exit
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dex
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bra .5
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.89 >LDYAI K.Buf256
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jmp K.NewStr.YA
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.90 lda #SYSMGR.ERRSYN
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sec
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rts
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*--------------------------------------
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K.RealPath.RemoveAtX
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txa X = "/something"
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tay
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.1 iny
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lda K.Buf256,y
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beq .2
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cmp #'/'
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bne .1
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.2 phx
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.3 lda K.Buf256,y
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sta K.Buf256,x
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beq .4
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iny
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inx
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bne .3
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.4 txa
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bne .8
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lda #'/' Make sure we have a least '/' in the buffer
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sta K.Buf256
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stz K.Buf256+1
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.8 plx
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rts
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*--------------------------------------
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MAN
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SAVE /A2OSX.SRC/SYS/KERNEL.S.STDLIB
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LOAD /A2OSX.SRC/SYS/KERNEL.S
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ASM
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