A2osX/SYS/KERNEL.S.IO.txt

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PREFIX /A2OSX.BUILD
AUTO 4,1
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*/--------------------------------------
* # open
* ## C
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* `hFD open(const char *pathname, short int flags);`
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* ## ASM
* **In:**
* `>PUSHB flags`
* `>LDYA pathname`
* `>SYSCALL open`
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* ## RETURN VALUE
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* A = hFD
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* REG File created on ProDOS : T=TXT,X=$0000
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*\--------------------------------------
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K.Open.FLAGS .BS 1
K.Open.TYPE .BS 1
K.Open.AUXTYPE .BS 2
*--------------------------------------
K.Open pha
>PULLB K.Open.FLAGS
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lda #S.FI.T.TXT
sta K.Open.TYPE
stz K.Open.AUXTYPE
stz K.Open.AUXTYPE+1
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pla
IO.Open.I jsr STDIO.SetMLIPathYA
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ldx #5 $/DEV/
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cpx K.MLI.PATH
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bcs IO.OPEN.REG
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.1 lda K.MLI.PATH,x
cmp IO.DEVDIR,x
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bne IO.OPEN.REG
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dex
bne .1
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*--------------------------------------
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* /DEV/xxxxxx (CDEV,BDEV,DSOCK,SSOCK,PIPE)
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*--------------------------------------
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>LDYAI K.MLI.PATH+6 skip $/DEV/
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jsr K.GetDevByName
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bcs IO.OPEN.RTS
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>STYA pFD
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phx DEVID
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lda (pFD) #S.FD.T
tax
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pla
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jmp (.2,x)
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.2 .DA STDIO.IOERR REG
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.DA STDIO.IOERR DIR
.DA IO.OPEN.CDEV
.DA STDIO.IOERR BDEV
.DA STDIO.IOERR LNK
.DA IO.OPEN.DSOCK
.DA IO.OPEN.SSOCK
.DA IO.OPEN.PIPE
IO.OPEN.9 sec
IO.OPEN.RTS rts
*--------------------------------------
IO.OPEN.REG >MLICALL MLIGETFILEINFO
bcc K.IO.OPEN.REG.E Already Exists
bit K.Open.FLAGS Create if not exists ?
bpl IO.OPEN.9 No, return MLI error
lda #S.FI.A.FULL Yes, Create...
sta K.MLI.PARAMS+3 Access
lda K.Open.TYPE
sta K.MLI.PARAMS+4 File type
>LDYA K.Open.AUXTYPE
>STYA K.MLI.PARAMS+5 Aux type
lda #S.FI.ST.STD
sta K.MLI.PARAMS+7
ldx #3
.1 lda DATELO,x
sta K.MLI.PARAMS+8,x
dex
bpl .1
>MLICALL MLICREATE
bcs IO.OPEN.RTS
K.IO.OPEN.REG.E >LDYAI S.FD.REG
ldx #S.MEM.F.INIT0+S.MEM.F.FD
jsr MEM.GetMem.YAX
bcs IO.OPEN.RTS
>STYA pFD
stx .8+1 save hFD
* ldy #S.FD.T Done by GetMem0
* lda #S.FD.T.REG
* sta (pFD),y
jsr STDIO.SetIOBUF
bcs .9
>MLICALL MLIOPEN
bcs .9
lda K.MLI.PARAMS+5 get ref_num
ldy #S.FD.REG.REF
sta (pFD),y
sta K.MLI.PARAMS+1 Next MLI Calls are REF_NUM based
lda K.Open.FLAGS
bit #O.WRONLY
beq .20 Write mode ?
and #O.APPEND Append ?
bne .11 yes, go to end of file
stz K.MLI.PARAMS+2
stz K.MLI.PARAMS+3
stz K.MLI.PARAMS+4
>MLICALL MLISETEOF no, reset size to 0
bra .21
.11 >MLICALL MLIGETEOF
bcs .9
>MLICALL MLISETMARK
.21 bcs .9
.20 lda K.Open.FLAGS
and #O.TEXT Text Mode ?
beq .8
lda #$FF
sta K.MLI.PARAMS+2
lda #C.CR
sta K.MLI.PARAMS+3
>MLICALL MLINEWLINE
bcs .9
.8 lda #$ff
rts
.9 pha
lda .8+1
pha
jsr IO.Close.I
pla
sec
rts
*--------------------------------------
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IO.OPEN.CDEV sta .1+1 A=DEVID
pha
jsr K.IOCTL.GetPDrv
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ldx #IOCTL.OPEN
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pla pass A=DEVID To Driver
jsr K.IOCTL.pDrvJmp
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bcs .9
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.1 ldx #$ff SELF MODIFIED
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lda Dev.Table.hFD,x
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.9 rts
*--------------------------------------
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IO.OPEN.DSOCK
*--------------------------------------
IO.OPEN.SSOCK
*--------------------------------------
IO.OPEN.PIPE
clc
rts
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*/--------------------------------------
* # close
* ## C
* `int close(hFD fd);`
* ## ASM
* **In:**
* `lda fd`
* `>SYSCALL close`
*\--------------------------------------
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K.Close pha save hFD
jsr K.GetMemPtr
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>STYA pFD
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IO.Close.I lda (pFD) #S.FD.T
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tax
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pla
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jmp (.1,x)
.1 .DA IO.CLOSE.REG
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.DA IO.CLOSE.DIR
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.DA IO.CLOSE.CDEV
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.DA IO.CLOSE.BDEV
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.DA STDIO.IOERR LNK
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.DA IO.CLOSE.DSOCK
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.DA IO.CLOSE.SSOCK
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.DA IO.CLOSE.PIPE
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*--------------------------------------
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IO.CLOSE.REG
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IO.CLOSE.DIR pha save hFD
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ldy #S.FD.REG.REF
lda (pFD),y
beq .1
sta K.MLI.PARAMS+1
>MLICALL MLICLOSE
.1 ldy #S.FD.REG.IOBUF
lda (pFD),y
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beq .2
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jsr K.FreeMem
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.2 pla
jmp K.FreeMem
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*--------------------------------------
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IO.CLOSE.CDEV
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IO.CLOSE.BDEV
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*--------------------------------------
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IO.CLOSE.DSOCK
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IO.CLOSE.SSOCK
*--------------------------------------
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IO.CLOSE.PIPE clc
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rts
*/--------------------------------------
* # read
* ## C
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* `int read(hFD fd, void *buf, int count);`
* ## ASM
* **In:**
* `>PUSHWI count`
* `>PUSHW buf`
* `lda fd`
* `>SYSCALL read`
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* ## RETURN VALUE
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* CC: Y,A = bytes read
* CS: A = EC
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*\--------------------------------------
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K.Read jsr K.GetMemPtr
>STYA pFD
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IO.Read.I lda (pFD) #S.FD.T
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tax
jmp (.1,x)
.1 .DA IO.READ.REG
.DA STDIO.IOERR DIR
.DA IO.READ.CDEV
.DA STDIO.IOERR BDEV
.DA STDIO.IOERR LNK
.DA STDIO.IOERR DSOCK
.DA IO.READ.SSOCK
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.DA IO.READ.PIPE
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*/--------------------------------------
* # write
* ## C
* `int write(hFD fd, const void *buf, int count);`
* ## ASM
* **In:**
* `>PUSHWI count`
* `>PUSHW buf`
* `lda fd`
* `>SYSCALL write`
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* ## RETURN VALUE
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* CC: Y,A = bytes written
* CS: A = EC
*\--------------------------------------
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K.Write jsr K.GetMemPtr
>STYA pFD
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IO.Write.I lda (pFD) #S.FD.T
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tax
jmp (.1,x)
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.1 .DA IO.WRITE.REG
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.DA STDIO.IOERR DIR
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.DA IO.WRITE.CDEV
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.DA STDIO.IOERR BDEV
.DA STDIO.IOERR LNK
.DA STDIO.IOERR DSOCK
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.DA IO.WRITE.SSOCK
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.DA IO.WRITE.PIPE
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*--------------------------------------
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IO.READ.REG ldx #MLIREAD
.HS 2C BIT ABS
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*--------------------------------------
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IO.WRITE.REG ldx #MLIWRITE
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ldy #S.FD.REG.REF
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lda (pFD),y
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sta K.MLI.PARAMS+1
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>PULLW K.MLI.PARAMS+2
>PULLW K.MLI.PARAMS+4
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lda #4 Param Count = 4 for MLIREAD & MLIWRITE
jsr GP.MLICall
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>LDYA K.MLI.PARAMS+6
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rts
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*--------------------------------------
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IO.READ.CDEV ldx #IOCTL.READ
.HS 2C BIT ABS
*--------------------------------------
IO.WRITE.CDEV ldx #IOCTL.WRITE
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>PULLW K.S.IOCTL+S.IOCTL.BUFPTR
>PULLW K.S.IOCTL+S.IOCTL.BYTECNT
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jsr K.IOCTL.GetPDRV
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>LDYAI K.S.IOCTL
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.1 jsr K.IOCTL.pDrvJmp
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bcs .9
>LDYA K.S.IOCTL+S.IOCTL.BYTECNT
.9 rts
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*--------------------------------------
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IO.WRITE.SSOCK ldy #S.FD.SSOCK.WRITE
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.HS 2C BIT ABS
*--------------------------------------
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IO.READ.SSOCK ldy #S.FD.SSOCK.READ
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lda (pFD),y
tax Function Offset in LIB
ldy #S.FD.HANDLER
lda (pFD),y
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jsr K.GetMemPtr
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>STYA .1
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ldy #S.FD.SSOCK.HSKT
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lda (pFD),y
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.1 jmp $ffff
*--------------------------------------
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IO.READ.PIPE >PULLW K.S.IOCTL+S.IOCTL.BUFPTR
>PULLW K.S.IOCTL+S.IOCTL.BYTECNT
ldy #S.FD.PIPE.S
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lda (pFD),y
bit #S.FD.PIPE.S.WOpened
beq .9 Remote PS did not opened yet the pipe
bit #S.FD.PIPE.S.WClosed
beq .99 Remote PS closed the Pipe
ldy #S.FD.PIPE.hMem
lda (pFD),y
jsr K.GetMemPtr
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clc
rts
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.9 lda #MLI.E.VOLFULL
sec
rts
.99 lda #MLI.E.EOF
sec
rts
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*--------------------------------------
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IO.WRITE.PIPE >PULLW K.S.IOCTL+S.IOCTL.BUFPTR
>PULLW K.S.IOCTL+S.IOCTL.BYTECNT
ldy #S.FD.PIPE.S
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lda (pFD),y
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bit #S.FD.PIPE.S.ROpened
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beq .9 Remote PS did not opened yet the pipe
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bit #S.FD.PIPE.S.RClosed
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beq .99 Remote PS closed the Pipe
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ldy #S.FD.PIPE.hMem
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lda (pFD),y
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jsr K.GetMemPtr
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>STYA .1+2
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ldy #S.FD.PIPE.Head
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lda (pFD),y
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inc
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dey #S.FD.PIPE.Tail
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cmp (pFD),y
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beq .9 PIPE is full
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iny
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sta (pFD),y
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tay
lda K.IOBuf
.1 sta $ffff,y
clc
rts
.9 lda #MLI.E.VOLFULL
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sec
rts
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.99 lda #MLI.E.EOF
sec
rts
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*/--------------------------------------
* # IOCTL
* ## C
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* `int ioctl(short int hFD, int request, void * param );`
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* ## ASM
* `PUSHWI param`
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* `PUSHBI request`
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* `lda hFD`
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* `>SYSCALL IOCTL`
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* ## RETURN VALUE
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* Y,A = ...
*\--------------------------------------
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K.IOCTL jsr K.GetMemPtr
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bcs .9
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>STYA pFD
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jsr K.IOCTL.GetPDrv
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>PULLA
tax request
>PULLYA param
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jmp (pDRV) SELF MODIFIED x = op
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.9 lda #MLI.E.NODEV
>RET 3
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*--------------------------------------
K.IOCTL.GetPDrv ldy #S.FD.DEV.DRVPTR
lda (pFD),y
sta pDRV
iny
lda (pFD),y
sta pDRV+1
rts
K.IOCTL.pDrvJmp jmp (pDrv)
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*/--------------------------------------
* # pipe
* ## C
* `int pipe(int pipefd[2]);`
* ## ASM
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*\--------------------------------------
K.Pipe
.9 sec
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rts
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*--------------------------------------
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IO.DEVDIR >PSTR "/DEV/"
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.IO
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM