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A2osX/SYS/KERNEL.S.STDIO.txt

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NEW
AUTO 3,1
*/--------------------------------------
* # putchar (BLOCKING)
* Print A (char) to StdOut
* ## C
* `int putchar ( short int character );`
* ## ASM
* **In:**
* `lda character`
* `>SYSCALL putchar`
* ## RETURN VALUE
* CC = success
*\--------------------------------------
K.PutChar >PUSHA character
ldy #S.PS.hStdOut
lda (pPS),y
jsr K.FPutC
bcc .8
tay
bne .8
>PULLA CS,A=0:BLOCKING, restore A
.8 rts
*/--------------------------------------
* # fputc (BLOCKING)
* Print A (char) to hFILE
* ## C
* `int fputc ( hFILE stream , short int character );`
* ## ASM
* **In:**
* `>PUSHB character`
* `lda stream`
* `>SYSCALL fputc`
* ## RETURN VALUE
* CC = success
*\--------------------------------------
K.FPutC jsr PFT.CheckNodeA
bcs .8
lda (pStack) character
sta K.IOBuf
lda #0
>PUSHA
inc write 1 byte
>PUSHA
>PUSHWI K.IOBuf buf
jsr IO.Write
bcc .8 pop char...
cmp #E.NODATA
sec
bne .8
inc CS,A=0:BLOCKING
rts
.8 >POP 1
rts
*/--------------------------------------
* # puts (BLOCKING)
* Write Str to StdOut, appends '\r\n'
* ## C
* `int puts ( const char * str );`
* **In:**
* ## ASM
* `>LDYAI str`
* `>SYSCALL PutS`
* ## RETURN VALUE
* CC = success
*\--------------------------------------
K.PutS >STYA .1+1
ldy #0
.1 lda $FFFF,y SELF MODIFIED
beq .2
sta K.IOBuf,y
iny
bne .1
.9 lda #E.BUF
sec
rts
.2 lda #C.CR
sta K.IOBuf,y
iny
beq .9
lda #C.LF
sta K.IOBuf,y
iny
beq .9
lda #0
sta K.IOBuf,y
ldy #S.PS.hStdOut
lda (pPS),y
>PUSHA
>PUSHWI K.IOBuf
jsr K.FPutS
bcc K.PutS.RTS
tay
bne K.PutS.RTS
>LDYA .1+1 CS,A=0:BLOCKING, restore Y,A
K.PutS.RET3 >POP 3 pop StdOut & buffer
K.PutS.RTS rts
*/--------------------------------------
* # fputs (BLOCKING)
* Write Str to hFILE
* ## C
* `int fputs (hFILE stream, const char * str );`
* ## ASM
* **In:**
* `>PUSHB stream`
* `>PUSHW str`
* `>SYSCALL fputs`
* ## RETURN VALUE
* CC = success
*\--------------------------------------
K.FPutS jsr PFT.CheckNode2 set IO.hFD
bcs K.PutS.RET3
lda (pStack)
sta ZPPtr2 Get String
ldy #1
lda (pStack),y
sta ZPPtr2+1
ldy #0
ldx #0
.1 lda (ZPPtr2),y
beq .2
iny
bne .1
inx
bra .1
.2 txa
>PUSHA push len HI
tya
>PUSHA push len LO
>PUSHW ZPPtr2
jsr IO.Write
bcc K.PutS.RET3
cmp #E.NODATA
sec
bne K.PutS.RET3 IO Error
inc FF-> 0 = BLOCKING
K.FPutS.RTS rts
*/--------------------------------------
* # fgets (BLOCKING)
* read bytes from stream into the array
* pointed to by s, until n-1 bytes are read, or a <newline> is read and
* transferred to s, or an end-of-file condition is encountered. The
* string is then terminated with a null byte.
* ## C
* `char *fgets(hFILE stream, char * s, int n);`
* ## ASM
* **In:**
* `>PUSHB hFILE`
* `>PUSHW s`
* `>PUSHW n`
* `>SYSCALL fgets`
* ## RETURN VALUE
* Y,A: s
* CC = success
*\--------------------------------------
* (pStack)+4 h
* (pStack)+2 s -> ZPPtr2
* (pStack)+0 n -> ZPPtr1
*--------------------------------------
K.FGetS jsr PFT.CheckNode4
bcs K.FPutS.RTS
ldy #3
.1 lda (pStack),y
sta ZPPtr1,y
dey
bpl .1
lda ZPPtr1+1
bmi .4 already something in buffer
.2 jsr STDIO.Get.1
bcc .3
cmp #MLI.E.EOF
beq .9
cmp #E.NODATA
sec
bne .9 IO error
lda #0 BLOCKING
rts
.3 lda K.IOBuf
cmp #C.LF Discard any leading LF from a prev CR/LF
beq .2
clc set n = !n + 1
lda ZPPtr1
eor #$ff
adc #1
sta ZPPtr1
lda ZPPtr1+1
eor #$ff
adc #0
sta ZPPtr1+1
bra .5
*--------------------------------------
.4 jsr STDIO.Get.1
bcs .6
.5 lda K.IOBuf
cmp #C.CR
beq .8
jsr SHARED.PutCP2
inc ZPPtr1
bne .4
inc ZPPtr1+1
bne .4
beq .8 Buffer full
.6 cmp #MLI.E.EOF
beq .8 String terminated by EOF
cmp #E.NODATA
sec
bne .9 I/O error
ldy #3
.7 lda ZPPtr1,y NO DATA, but string not yet terminated
sta (pStack),y
dey
bpl .7
lda #0 BLOCKING
* sec
rts
.8 lda #0
sta (ZPPtr2) terminate string
clc
.9 >RET 5
*/--------------------------------------
* # getchar (BLOCKING)
* Get char from StdIn
* ## C
* `short int getchar ( );`
* ## ASM
* **In:**
* `>SYSCALL getchar`
* ## RETURN VALUE
* CC = success
* A = char
*\--------------------------------------
K.GetChar ldy #S.PS.hStdIn
lda (pPS),y
*/--------------------------------------
* # getc (BLOCKING)
* Get char from Node
* ## C
* `short int getc ( short int stream );`
* ## ASM
* **In:**
* `lda stream`
* `>SYSCALL getc`
* ## RETURN VALUE
* CC = success
* A = char
*\--------------------------------------
K.GetC jsr PFT.CheckNodeA
bcs .9
jsr STDIO.Get.1
bcc .8
cmp #E.NODATA
sec
bne .9 I/O error
inc 0 = BLOCKING
rts
.8 lda K.IOBuf
.9 rts
*--------------------------------------
STDIO.Get.1 lda #0
>PUSHA
inc read 1 byte
>PUSHA
>PUSHWI K.IOBuf
jmp IO.Read
*/--------------------------------------
* # ungetc
* push byte back into input stream
* ## C
* `short int ungetc(short int c, short int stream);`
* ## ASM
* `>PUSHB c`
* `>PUSHB stream`
* `>SYSCALL ungetc`
* ## RETURN VALUE
* CC = success
* A = char
*\--------------------------------------
K.UngetC clc
rts
*/--------------------------------------
* # FOpen
* Open a file
* ## C
* `short int fopen ( const char *filename, short int flags, short int ftype, int auxtype );`
* **In:**
* ## ASM
* `>PUSHW filename`
* `>PUSHB flags`
* + O.RDONLY : if R and !exists -> ERROR
* + O.WRONLY : if W and !exists -> CREATE
* + O.TRUNC : Reset Size To 0
* + O.APPEND : Append
* + O.TEXT : Open/Append in Text mode
* + O.CREATE : Create if not exists
* `>PUSHB ftype`
* `>PUSHW auxtype`
* TODO: replace flags/ftype/auxtype with mode="w+,t=TYP,x=AUXTYPE"
* + r = O_RDONLY
* + r+ = O_RDWR
* + w = O_WRONLY | O_CREAT | O_TRUNC
* + w+ = O_RDWR | O_CREAT | O_TRUNC
* + a = O_WRONLY | O_CREAT | O_APPEND
* + a+ = O_RDWR | O_CREAT | O_APPEND
* + ,t=123 or t=$ff or t=TXT
* + ,x=12345 or x=$ffff
* ## RETURN VALUE
* CC : A = hFILE
* CS : A = EC
*\--------------------------------------
K.FOpen jsr PFT.CheckPath4
bcs .9
>PULLW IO.Open.AUXTYPE
>PULLB IO.Open.TYPE
>PULLB IO.Open.FLAGS
inc pStack discard filename
inc pStack
jmp IO.Open
.9 >POP 6
.99 rts
*/--------------------------------------
* # FClose
* Close a file
* ## C
* `int fclose ( short int stream );`
* ## ASM
* **In:**
* `lda stream`
* `>SYSCALL FClose`
* ## RETURN VALUE
*\--------------------------------------
K.FClose jsr PFT.CheckNodeA
bcs K.FRead.RTS
jmp IO.Close
*/--------------------------------------
* # FRead (BLOCKING)
* Read bytes from file
* ## C
* `int fread (short int stream, void * ptr, int count );`
* ## ASM
* **In:**
* `>PUSHWI count`
* `>PUSHW ptr`
* `lda stream`
* `>SYSCALL fread`
* ## RETURN VALUE
* Y,A = Bytes Read
*\--------------------------------------
K.FRead jsr PFT.CheckNodeA
bcs K.FWrite.RET4
jsr IO.Read
bcs K.FWrite.9
K.FRead.RTS rts
*/--------------------------------------
* # FWrite (BLOCKING)
* Write bytes to file
* ## C
* `int fwrite ( short int stream, const void * ptr, int count );`
* ## ASM
* **In:**
* `>PUSHWI count`
* `>PUSHW ptr`
* `lda stream`
* `>SYSCALL fwrite`
* ## RETURN VALUE
* Y,A = Bytes Written
*\--------------------------------------
K.FWrite jsr PFT.CheckNodeA
bcs K.FWrite.RET4
jsr IO.Write
bcc K.FWrite.RTS
K.FWrite.9 cmp #E.NODATA
sec
bne K.FWrite.RTS IO Error
dec pStack FF = NODATA
dec pStack
dec pStack
dec pStack keep ptr & count on stack
inc 0 = BLOCKING
* sec
K.FWrite.RTS rts
K.FWrite.RET4 >RET 4
*/--------------------------------------
* # FFlush
* ## C
* `int fflush( short int stream );`
* ## ASM
* **In:**
* `lda stream`
* `>SYSCALL fflush`
*\--------------------------------------
K.FFlush jsr PFT.CheckNodeA
bcs .9
lda (pFD)
bne STDIO.IOERR
>MLICALL MLIFLUSH
.9 rts
*--------------------------------------
STDIO.IOERR lda #MLI.E.IO
sec
rts
*/-------------------------------------
* # FSeek
* Set the file-position indicator for hFILE
* ## C
* `int fseek( short int stream, long offset, short int whence );`
* ## ASM
* **In:**
* `>PUSHBI whence`
* `>PUSHL offset`
* `lda stream`
* `>SYSCALL fseek`
*\-------------------------------------
K.FSeek jsr PFT.CheckNodeA
bcc .11
>RET 5
.11 lda (pFD)
bne STDIO.IOERR
>PULLL ACC32
>PULLA whence
cmp #SEEK.END
beq .30
bcs .98
dec
beq .20
stz K.MLI.PARAMS+2
stz K.MLI.PARAMS+3
stz K.MLI.PARAMS+4
bra .8
* SEEK.CUR
.20 >MLICALL MLIGETMARK
bcc .8
rts
* SEEK.END
.30 >MLICALL MLIGETEOF
bcs .9
.8 ldy #0
clc
.81 lda K.MLI.PARAMS+2,y
adc ACC32,y
sta K.MLI.PARAMS+2,y
iny
tya 3 bytes, 24 bits!!!
eor #3
bne .81
bcs .99 Offset out of range!
.82 >MLICALL MLISETMARK
bcc .9
cmp #MLI.E.BEYEOF
bne .9
>MLICALL MLISETEOF
bcc .82
.9 rts
.98 lda #E.BADARG
.HS 2C bit abs
.99 lda #E.FTB
* sec
K.FSeek.RTS rts
*/--------------------------------------
* # FEOF
* Test the end-of-file indicator for hFILE
* ## C
* `int feof( short int stream );`
* ## ASM
* **In:**
* `lda stream`
* `>SYSCALL feof`
* ## RETURN VALUE
* CC :
* A = $ff EOF
* A = 0 NOT EOF
* CS :
*\--------------------------------------
K.FEOF jsr PFT.CheckNodeA
bcs K.FSeek.RTS
IO.EOF lda (pFD)
tax
jmp (.1,x)
.1 .DA FS.EOF.REG
.DA STDIO.IOERR DIR
.DA IO.EOF.CDEV
.DA STDIO.IOERR BDEV
.DA STDIO.IOERR LNK
.DA STDIO.IOERR DSOCK
.DA IO.EOF.SSOCK
.DA IO.EOF.PIPE
*/--------------------------------------
* # FTell
* Return the current value of the file-position indicator
* ## C
* `long ftell( short int stream );`
* ## ASM
* **In:**
* `lda stream`
* `>SYSCALL ftell`
* ## RETURN VALUE
* On stack (long)
*\--------------------------------------
K.FTell jsr PFT.CheckNodeA
bcs .9
>MLICALL MLIGETMARK
bcs .9
lda #0
>PUSHA
ldy #2
.1 lda K.MLI.PARAMS+2,y
>PUSHA
dey
bpl .1
.9 rts
*/--------------------------------------
* # Remove
* Remove a file or directory
* ## C
* `int remove ( const char *pathname );`
* ## ASM
* **In:**
* `>LDYA pathname`
* `>SYSCALL remove`
* ## RETURN VALUE
*\--------------------------------------
K.Remove jsr PFT.CheckPathYA
bcs .9
>MLICALL MLIDESTROY
.9 rts
*/--------------------------------------
* # Rename
* Rename a file
* ## C
* `int rename ( const char * oldpath, const char * newpath );`
* ## ASM
* **In:**
* `>PUSHW oldpath`
* `>PUSHW newpath`
* `>SYSCALL rename`
* ## RETURN VALUE
*\--------------------------------------
K.Rename jsr PFT.CheckPath2
bcs .9
lda (pStack)
sta ZPPtr1
ldy #1
lda (pStack),y
sta ZPPtr1+1
dey ldy #0
.1 lda (ZPPtr1),y
beq .8
iny
sta K.Buf256,y
cpy #MLI.MAXPATH
bne .1
.8 sty K.Buf256
>LDYAI K.Buf256
>STYA K.MLI.PARAMS+3
>MLICALL MLIRENAME
.9 >RET 4
*/--------------------------------------
* # PrintF (BLOCKING)
* # FPrintF (BLOCKING)
* # SPrintF
* Prints C-Style String
* ## C
* `int printf ( const char *format, ... );`
* `int fprintf ( short int stream, const char *format, ... );`
* `int sprintf ( char *str, const char *format, ... );`
* ## ASM
* **In:**
* PrintF : (example is for printing Y,A as integer : format="%I", 2 bytes)
* `>PUSHW format`
* `>PUSHW i`
* `...`
* `>PUSHBI 2` #bytecount
* `>SYSCALL PrintF`
* FPrintF :
* `>PUSHB hFILE`
* `>PUSHW format`
* `>PUSHW i`
* `...`
* `>PUSHBI 2` #bytecount
* `>SYSCALL fprintf`
* SPrintF :
* `>PUSHW str`
* `>PUSHW format`
* `>PUSHW i`
* `...`
* `>PUSHBI 2` #bytecount
* `>SYSCALL sprintf`
* ## RETURN VALUE
* CC : success, Y,A = bytes sent
* CS : error, A = code from Output
* Specifiers :
* + %b : pull 1 byte to Print BIN
* + %d : pull 1 byte unsigned DEC 0..255
* + %D : pull 2 bytes unsigned DEC 0..65535
* + %u : pull 4 bytes long unsigned DEC 0..4294967295
* + %e : pull 5 Bytes float (-)1.23456789e+12
* + %f : pull 5 Bytes float (-)3.1415
* + %h : pull 1 byte to Print HEX
* + %H : pull 2 bytes to Print HEX
* + %i : pull 1 byte to Print signed DEC -128..127
* + %I : pull 2 bytes to Print signed DEC -32768..32767
* + %L : pull 4 bytes signed DEC -2147483648..2147483647
* + %s : pull 2 bytes ptr to C-Style String
* + %S : pull 2 bytes ptr to P-Style String
* + \b : Print 'BS' (08)
* + \e : Print 'ESC' ($1B,27)
* + \f : Print 'FF' ($0C,12)
* + \n : Print 'LF' ($0A,10)
* + \r : Print 'CR' ($0D,13)
* + \t : Print 'TAB' ($09,09)
* + \v : Print 'VT' ($0B,11)
* + \xHH : Print byte with hexadecimal value HH (1 to 2 digits)
* + \\\\ : Print \
* + \\% : Print %
* Modifiers for len and padding :
* + %d : '9' '12'
* + %2d : ' 9' '12'
* + %02d : '09' '12'
* + %11s : 'ABCDEFGH '
* + %011s : 'ABCDEFGH000'
* + %2f : '3.14'
*\--------------------------------------
.DUMMY ZPTMP+5,5 Used by : STDIO2
.OR ZPTMP+5 5 Bytes
PrintF.Cnt .BS 2
PrintF.hFILE .BS 1
STDIO.iStkB .BS 1
STDIO.PopCnt .BS 1
.ED
*--------------------------------------
K.PrintF.PadL .EQ FAC+5
K.PrintF.PadC .EQ ARG.SIGN
*--------------------------------------
K.PrintF ldy #S.PS.hStdOut
lda (pPS),y
sta PrintF.hFILE
ldx #1
.HS 2C BIT ABS
*--------------------------------------
K.FPrintf ldx #2
.HS 2C BIT ABS
*--------------------------------------
K.SPrintf ldx #3
*--------------------------------------
K.PrintF.1 sec format string->ptr2
jsr STDIO.GetParams
stx pIOBuf
sta pIOBuf+1 Output buffer->pIOBuf
sty STDIO.PopCnt Total bytes to POP
.1 jsr SHARED.GetCP2
bne .22
jmp .8 end of format..
.22 cmp #'%'
bne .10
stz K.PrintF.PadL
stz K.PrintF.PadC
lda (ZPPtr2)
beq .7 end of format... print % and exit
jsr ZP.IsDigit
bcs .6 no digit....go check specifier
cmp #'0' ...a 0...mmm... padding char?
bne .4
sta K.PrintF.PadC
jsr SHARED.NextCP2 skip 0 ...
lda (ZPPtr2)
beq .7
jsr ZP.IsDigit
bcs .6 %0x ??????
.4 jsr MATH.Dec2ACC32
bcs .99
lda ACC32
sta K.PrintF.PadL
lda K.PrintF.PadC
bne .5
lda #C.SPACE
sta K.PrintF.PadC
.5 jsr SHARED.AddY2P2 skip all processed chars
lda (ZPPtr2)
beq .7
.6 ldx #PrintFTBL1.Cnt-1 do we have a %x command?
.61 cmp PrintFTBL1,x
beq .62
dex
bpl .61
bra .20 unknown ...
.62 jsr SHARED.NextCP2
txa yes, jmp to it!
asl
tax
jsr PrintF.ESC
.11 bcc .1
bra .99
.7 lda #'%'
bra .20
*--------------------------------------
.10 cmp #'\'
bne .20
jsr SHARED.GetCP2
beq .99
ldx #PrintFTBL2.Cnt-1
.12 cmp PrintFTBL2,x
beq .19
dex
bpl .12
cmp #'x' \xHH
bne .1
jsr MATH.Hex2ACC32
bcs .99
jsr SHARED.AddY2P2
.14 lda ACC32
bra .20
.19 lda PrintFTBL2.OUT,x
.20 jsr PrintF.PutC
bcc .11
*--------------------------------------
.99 lda #E.BADARG
sec
jmp STDIO.Exit
*--------------------------------------
.8 ldx PrintF.hFILE
beq .80 Writing to buffer, append \0
>PUSHW PrintF.Cnt Writing to File/dev...
>PUSHWI K.IOBuf
txa
jsr K.FWrite
bcc .81
tay
bne .9
>RET 4 0=BLOCKING
.80 ldy PrintF.Cnt A=0, Writing to buffer, append \0
sta (pIOBuf),y
clc
.81 >LDYA PrintF.Cnt
* clc
.9 jmp STDIO.Exit
*--------------------------------------
PrintFTBL1 .AS "bdDuefhHiILsS"
PrintFTBL1.Cnt .EQ *-PrintFTBL1
PrintFTBL2 .AS "abefnrtv\%"
PrintFTBL2.Cnt .EQ *-PrintFTBL2
PrintFTBL2.OUT .HS 07.08.1B.0C.0A.0D.09.0B \a\b\e\f\n\r\t\v
.DA #'\' \\
.DA #'%' \%
*--------------------------------------
PrintF.ESC jmp (.1,x)
.1 .DA PrintF.B
.DA PrintF.D,PrintF.DD,PrintF.U
.DA PrintF.E,PrintF.F
.DA PrintF.H,PrintF.HH
.DA PrintF.I,PrintF.II,PrintF.L
.DA PrintF.S,PrintF.SS
*--------------------------------------
PrintF.B jsr STDIO.GetStkB
bcs PrintF.B.RTS
ldy #8
.1 asl
pha
lda #'0'/2
rol
jsr PrintF.PutC
bcs .9
pla
dey
bne .1
rts
.9 ply
PrintF.B.RTS
rts
*--------------------------------------
PrintF.I sec signed short
.HS 90 BCC
PrintF.D clc unsigned short (BYTE)
ldy #1
bra PrintF.NUM
PrintF.II sec signed int
.HS 90 BCC
PrintF.DD clc unsigned int (WORD)
ldy #2
bra PrintF.NUM
PrintF.L sec signed long
.HS 90 BCC
PrintF.U clc unsigned long (DWORD)
ldy #4
PrintF.NUM sty .2+1
ror ACC32.Sign save signed/unsigned flag
jsr M32.ACC32Z
.1 jsr STDIO.GetStkB
bcs PrintF.B.RTS
sta ACC32-1,y PULL 4,2 or 1
dey
bne .1
bit ACC32.Sign
bpl .4
.2 ldy #$ff SELF MODIFIED
lda ACC32-1,y Get highest Byte
bpl .4 positive....
lda #$ff
.3 cpy #4
beq .4
iny
sta ACC32-1,y
bra .3
.4 ldx K.PrintF.PadL
ldy K.PrintF.PadC
rol ACC32.Sign get back signed/unsigned flag
jsr MATH.ACC322STR10
bra PrintF.StrNum
*--------------------------------------
* EXP(8) 1(s) 1significants(31)
* http://apple2.org.za/gswv/a2zine/GS.WorldView/Resources/GS.TECH.INFO/AppleSoft/
*--------------------------------------
PrintF.E sec Force "E+12"
.HS 90 BCC
PrintF.F clc
lda (pStack) get current stack Ptr
sec at least 5 bytes remaining ?
sbc #5
bcc PrintF.StrNum.Err
sta (pStack)
* sec
adc pStack
ldy pStack+1 A,Y = float
ldx #FPU.SETFAC
jsr GP.ROMCALL
ldy #FOUTBuf+1 FOUT.1 will do a DEY
ldx #FPU.FOUT
jsr GP.ROMCALL
PrintF.StrNum ldy #0
.2 lda FOUTBuf,y
beq .8
iny
jsr PrintF.PutC
bcc .2
.9 rts
.8 clc
rts
PrintF.StrNum.Err
lda #E.STACK
sec
rts
*--------------------------------------
PrintF.S ldy #$ff CSTR
.HS 2C bit abs
PrintF.SS ldy #$00 PSTR
sty .1+1
jsr STDIO.GetStkB
bcs .9
sta ZPPtr1+1
jsr STDIO.GetStkB
bcs .9
sta ZPPtr1
lda (ZPPtr1) if CSTR:last char=0, if PSTR:len=0
beq .8
ldy .1+1
.1 lda #$ff Self Modified
bne .11 CSTR
tya PSTR
cmp (ZPPtr1) len check
beq .2
.11 iny
lda (ZPPtr1),y
beq .2
jsr PrintF.PutC
bcs .9
lda K.PrintF.PadL
beq .1
cpy K.PrintF.PadL
bne .1
.8 clc
rts
.2 lda K.PrintF.PadL
beq .8
.3 cpy K.PrintF.PadL
beq .8
lda K.PrintF.PadC
jsr PrintF.PutC
bcs .9
iny
bne .3
* clc
.9 rts
*--------------------------------------
PrintF.HH jsr STDIO.GetStkB
bcs STDIO.RTS
pha LO byte
jsr STDIO.GetStkB
plx
bcs STDIO.RTS
pha
txa
jsr PrintF.H.1
plx
bcs STDIO.RTS
txa
bra PrintF.H.1
*--------------------------------------
PrintF.H jsr STDIO.GetStkB
bcs STDIO.RTS
PrintF.H.1 jsr STDIO.A2HexAX
jsr PrintF.PutC
bcs STDIO.RTS
txa
*--------------------------------------
PrintF.PutC phy
ldy PrintF.Cnt
sta (pIOBuf),y
ply
inc PrintF.Cnt
bne .8
lda PrintF.hFILE
bne .9
inc pIOBuf+1
inc PrintF.Cnt+1
.8 clc
rts
.9 lda #E.BUF
sec
STDIO.RTS rts
*/--------------------------------------
* # ScanF (BLOCKING)
* # FScanF (BLOCKING)
* # SScanF
* Read formatted data from string
* ## C
* `int scanf( const char *format, ... );`
* `int fscanf( short int stream, const char *format, ... );`
* `int sscanf ( const char *s, const char *format, ... );`
* ## ASM
* **In:**
* ScanF :
* `>PUSHW format`
* `>PUSHW ptr`
* `...`
* `>PUSHB bytecount`
* `>SYSCALL scanf`
* FScanF :
* `>PUSHB stream`
* `>PUSHW format`
* `>PUSHW ptr`
* `...`
* `>PUSHB bytecount`
* `>SYSCALL fscanf`
* SScanF :
* `>PUSHW s`
* `>PUSHW format`
* `>PUSHW ptr`
* `...`
* `>PUSHB bytecount`
* `>SYSCALL sscanf`
* Specifiers :
* + %i : short int
* + %d : byte
* + %I : int
* + %D : word
* + %L : long int
* + %U : dword
* + %h : HEX byte
* + %H : HEX word
* + %s : string
* TODO : %10s
* ## RETURN VALUE
* A = Number of arguments filled.
*\--------------------------------------
K.ScanF ldy #S.PS.hStdIn
lda (pPS),y
sta PrintF.hFILE
ldx #1
.HS 2C BIT ABS
*--------------------------------------
K.FScanF ldx #2
.HS 2C BIT ABS
*--------------------------------------
K.SScanF ldx #3
*--------------------------------------
K.SScanF.1 clc format string->ptr1
jsr STDIO.GetParams
stx ZPPtr2
sta ZPPtr2+1 Output buffer->ZPPtr2
sty STDIO.PopCnt Total bytes to POP
ldx PrintF.hFILE
beq .1
txa
>PUSHA
>PUSHW pIOBuf
>PUSHWI 256
jsr K.FGetS
bcc .1
tax
bne STDIO.RTS
>RET 4
.1 jsr SHARED.GetCP1 End Of format?
beq .8
cmp #'%' Escape ?
beq .2
cmp #C.SPACE Space ?
beq .12
sta .11+1
jsr SHARED.GetCP2
beq .9
.11 cmp #$ff Same char in string?
beq .1
bra .9
.12 jsr SHARED.GetCP2
beq .9
cmp #C.SPACE
bne .9
.13 jsr SHARED.GetCP2
cmp #C.SPACE another space ?
beq .13
bra .1
.2 jsr SHARED.GetCP1 Get specifier after %
beq .9 unexpected End of format after "%" ?
ldx #K.SScanFJMP-K.SScanFTBL-2
.3 cmp K.SScanFTBL,x
beq .4
dex
dex
bpl .3
.9 lda #MLI.E.EOF
sec
jmp STDIO.Exit
.4 jsr STDIO.GetStkB
bcs .9
sta ZPPtr3+1
jsr STDIO.GetStkB
bcs .9
sta ZPPtr3
jsr .5
bcs .9 out of Ptr on stack
inc .8+1 parsed one more arg!
bra .1
.8 lda #$ff SELF MODIFIED Arg processed
clc
jmp STDIO.Exit
*--------------------------------------
.5 jmp (K.SScanFJMP,x)
*--------------------------------------
K.SScanFTBL .DA #'i,#1,#'d,#1,#'I,#2,#'D,#2,#'l,#4,#'u,#4,#'h,#1,#'H,#2,#'s,#2
K.SScanFJMP .DA K.SScanF.I
.DA K.SScanF.D
.DA K.SScanF.II
.DA K.SScanF.DD
.DA K.SScanF.L
.DA K.SScanF.U
.DA K.SScanF.H
.DA K.SScanF.HH
.DA K.SScanF.S
*--------------------------------------
K.SScanF.I
K.SScanF.D
K.SScanF.II
K.SScanF.DD
K.SScanF.L
K.SScanF.U lda K.SScanFTBL+1,x Get VAR size
pha Save VAL size
jsr MATH.Dec2ACC32
bra K.SScanF.GetVAL
*--------------------------------------
K.SScanF.HH
K.SScanF.H lda K.SScanFTBL+1,x Get VAR size
pha
jsr MATH.Hex2ACC32
K.SScanF.GetVAL jsr SHARED.AddY2P2 Y=char count parsed
.1 ply get back VAL size
.2 lda ACC32-1,y
dey
sta (ZPPtr3),y
bne .2
.9 rts
*--------------------------------------
K.SScanF.S ldy #$ff
.1 iny
lda (ZPPtr2),y Get char in string to scan
sta (ZPPtr3),y store in param ptr
beq K.SScanF.Fwd end of string to scan ?
cmp (ZPPtr1) match format next char ?
beq .2
cmp #C.SPACE is it a space ?
bne .1
.2 lda #0 add \0 to param ptr
sta (ZPPtr3),y
K.SScanF.Fwd jmp SHARED.AddY2P2 Y=char count parsed
*--------------------------------------
* IN:
* CC : format in ZPPtr1
* CS : format in ZPPtr2
* X = 3 : get format & buffer
* X = 2 : get format & hFile
* X = 1 : get format only
* OUT:
* X = Buf LO
* A = Buf HI
* format on stack
* Y = BytePtr
*--------------------------------------
STDIO.GetParams stz PrintF.Cnt
stz PrintF.Cnt+1
lda (pStack) Bytecount
tay
sty STDIO.iStkB
iny
lda (pStack),y format LO
pha
iny
lda (pStack),y format HI
bcs .10
sta ZPPtr1+1
pla
sta ZPPtr1
bra .11
.10 sta ZPPtr2+1
pla
sta ZPPtr2
.11 dex
beq .1
dex
beq .2
.3 stz PrintF.hFILE
iny
lda (pStack),y str LO
tax
iny
lda (pStack),y str HI
rts
.2 iny
lda (pStack),y hFILE
sta PrintF.hFILE
.1 ldx #K.IOBuf
lda /K.IOBuf
rts
*--------------------------------------
STDIO.GetStkB phy
ldy STDIO.iStkB
beq .9
lda (pStack),y
dec STDIO.iStkB
ply
clc
rts
.9 lda #E.STACK
ply
sec
rts
*--------------------------------------
STDIO.Exit php
pha
lda pStack
sec
adc STDIO.PopCnt
sta pStack
pla
plp
rts
*--------------------------------------
* Convert A to 2 hex digits in AX
*--------------------------------------
STDIO.A2HexAX pha
and #$0F
jsr .8
tax
pla
lsr
lsr
lsr
lsr
.8 ora #$30
cmp #'9'+1
bcc .9
adc #6
.9 rts
*--------------------------------------
MAN
SAVE usr/src/sys/kernel.s.stdio
LOAD usr/src/sys/kernel.s
ASM
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