A2osX/SBIN/SHELL.S.txt

PR#3
PREFIX /A2OSX.BUILD
LOMEM $A00
INC 1
AUTO 6
				.LIST OFF
				.OP	65C02
				.OR	$2000
				.TF /A2OSX.BUILD/SBIN/SHELL
*--------------------------------------
				.INB /A2OSX.BUILD/INC/MACROS.I
				.INB /A2OSX.BUILD/INC/A2OSX.I
				.INB /A2OSX.BUILD/INC/MLI.ERR.I
*--------------------------------------
ZPPtr1			.EQ ZPBIN
ZPPtr2			.EQ ZPBIN+2
ZPCMDBuf		.EQ ZPBIN+4
ZPCSHBufPtr		.EQ ZPBIN+6
ZPCSHSymbols	.EQ ZPBIN+8
ZPCSHData		.EQ ZPBIN+10
ZPCSHValue		.EQ ZPBIN+12
ZPCSHStack		.EQ ZPBIN+14
*--------------------------------------
CmdLine.MAX		.EQ 255
VarLen.MAX		.EQ 15
History.MAX		.EQ 256

CSH.E.SYNTAX	.EQ $7F
CSH.E.SOVERFLW	.EQ $7E
CSH.E.NOVERFLW	.EQ $7D
CSH.E.OOM		.EQ $7C
CSH.E.DUP		.EQ $7B
CSH.E.UNDEF		.EQ $7A
CSH.E.TMISMATCH	.EQ $79
*--------------------------------------
*			File Header (16 Bytes)
*--------------------------------------
CS.START		cld
				jmp (.1,x)
				.DA #$61				6502,Level 1 (65c02)
				.DA #1					BIN Layout Version 1
				.DA 0
				.DA CS.END-CS.START		CS
				.DA DS.END-DS.START		DS
				.DA #64					SS
				.DA #16					ZP
				.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1				.DA CS.INIT
				.DA CS.RUN
				.DA CS.DOEVENT
				.DA	CS.QUIT
*--------------------------------------
L.MSG.GREETINGS	.DA MSG.GREETINGS
L.MSG.PROMPT	.DA MSG.PROMPT
L.MSG.ECHO		.DA MSG.ECHO
L.MSG.ERROR		.DA MSG.ERROR
L.MSG.PRINTENV	.DA MSG.PRINTENV
L.MSG.CSHERR	.DA MSG.CSHERR
L.ENV.PATH		.DA ENV.PATH
L.ENV.PWD		.DA ENV.PWD
L.ENV.PS1		.DA ENV.PS1
L.ENV.HOME		.DA ENV.HOME
L.FMT.DATE		.DA FMT.DATE
L.FMT.TIME		.DA FMT.TIME
J.ESC			.DA CmdLine.BS			left arrow
				.DA HIS.GetNext			
				.DA HIS.GetPrev
				.DA CmdLine.NAK			right arow
L.INTCMDS		.DA INTCMDS
J.INTCMDS		.DA Cmd.Exec.CD
				.DA Cmd.Exec.DATE
				.DA Cmd.Exec.ECHO
				.DA Cmd.Exec.EXIT
				.DA Cmd.Exec.PAUSE
				.DA Cmd.Exec.PWD
				.DA Cmd.Exec.READ
				.DA Cmd.Exec.SET
				.DA Cmd.Exec.SLEEP
				.DA Cmd.Exec.STARTPROC
				.DA Cmd.Exec.TIME
L.CSH.BOPS		.DA CSH.BOPS
J.CSH.BOPS		.DA CSH.BOPS.ADD
				.DA CSH.BOPS.SUB
				.DA CSH.BOPS.MUL
				.DA CSH.BOPS.DIV
				.DA CSH.BOPS.MOD
				.DA CSH.BOPS.SHL
				.DA CSH.BOPS.SHR
				.DA CSH.BOPS.L
				.DA CSH.BOPS.G
				.DA CSH.BOPS.LE
				.DA CSH.BOPS.GE
				.DA CSH.BOPS.EQ
				.DA CSH.BOPS.NE
				.DA CSH.BOPS.AND
				.DA CSH.BOPS.OR
				.DA CSH.BOPS.EOR
				.DA CSH.BOPS.LAND
				.DA CSH.BOPS.LOR
L.CSH.KEYWORDS	.DA CSH.KEYWORDS
J.CSH.KEYWORDS	.DA CSH.IF
				.DA CSH.WHILE
				.DA CSH.ELSE
				.DA CSH.DO
				.DA CSH.FOR
				.DA CSH.SWITCH
				.DA CSH.CASE
				.DA CSH.BREAK
				.DA CSH.CONTINUE
				.DA CSH.CHAR
				.DA CSH.INT
				.DA CSH.LONG
				.DA CSH.FLOAT
J.CSH.KEYWORDS.START
				.DA CSH.IF.START
				.DA CSH.WHILE.START
J.CSH.KEYWORDS.END
				.DA CSH.IF.END
				.DA CSH.WHILE.END
L.ERR.Codes		.DA ERR.Codes
L.ERR.Messages	.DA ERR.Messages
				.DA 0
*--------------------------------------
CS.INIT			jsr SetPWD

				jsr CMD.Init
				bcs .9

				lda (pPs)
				ora #S.PS.F.EVENT		Now accept events
				sta (pPs)

				ldy #S.PS.ARGC
				lda (pPs),y

				beq .1					no arg, continue starting interactive

				jmp CSH.Init

.1				jsr HIS.Init
				bcs .9

				>LDYA L.MSG.GREETINGS
				>SYSCALL PrintF.YA

.9				rts
*--------------------------------------
CS.RUN			>LDA.G bReadMode		READ Command ?
				bne CS.RUN.READ
				
				ldy #S.PS.RC
				lda (pPs),y
				beq .11
				jsr IO.PrintErrMsg
				bcs CS.RUN.EXIT.RTS
				
.11				>LDA.G bPause
				bpl .13

				>SYSCALL GetChar
				bcs .8

.13				jsr CheckSleep
				bne .8

				>LDA.G CSH.hBuf			batch mode ?
				beq .10

				jmp CS.RUN.BATCH
*--------------------------------------
.10				jsr CmdLine.RESET		reset CmdBuf
				
.12				jsr PrintPrompt
				bcs CS.RUN.EXIT.RTS

.1				>SYSCALL Sleep
				>SYSCALL GetChar
				bcs .1					no char

				jsr CS.CHARIN

				>LDA.G bCmdBufExec		Something to execute ?
				bpl .1

				>LDA.G CmdBuflen
				beq .10					Empty line
				
				jsr CMD.Parse

				>LDA.G CmdBuflen
				beq .10					Empty line

				jsr HIS.Add

				jsr CMD.Exec
				bcs .2
				
				lda #0

.2				ldy #S.PS.RC
				sta (pPs),y

				>LDA.G bExit
				bne CS.RUN.EXIT

.8				clc
				rts

CS.RUN.EXIT		lda #0
CS.RUN.EXIT.ERR	sec
CS.RUN.EXIT.RTS	rts	
*--------------------------------------
CS.RUN.READ		lda #0					reset Buffer
				sta (ZPCMDBuf)

.1				>SYSCALL Sleep
				>SYSCALL GetChar
				bcs .1					no char

				jsr CS.CHARIN

				>LDA.G bCmdBufExec
				bpl .1

				>PUSHW ZPCMDBuf

				>PUSHEA.G CMD.VarName
				>SYSCALL SetEnv
				rts
*--------------------------------------
CS.RUN.BATCH	jsr	CSH.Run
				bcc .7
				
				cmp #MLI.E.EOF
				beq .9

				pha

				jsr CSH.ErrorMsg
				
				pla

				ldy #S.PS.RC
				sta (pPs),y
				pha

				ldy #bExitOnEOF
				lda (pData),y
				asl						CS if bExitOnEOF

				pla
				rts

.7				>LDA.G bCmdBufExec
				bpl .8					Empty line....nothing to do....

				jsr Cmd.Parse

				lda (ZPCMDBuf)
				beq .8

				jsr Cmd.Exec
				bcs .8

				lda #0
				
.8				ldy #S.PS.RC
				sta (pPs),y
				clc
				rts
				
.9				lda #0
				sec
				rts
*--------------------------------------
CS.DOEVENT		lda (pEvent)
				bpl .9

				jsr CheckSleep
				beq .9

*				ldy #Sleep				already set by CheckSleep
				clc
				ldx #4
				
.1				lda (pData),y
				sbc #0
				sta (pData),y
				iny
				dex
				bne .1

.9				sec
				rts
*--------------------------------------
CS.CHARIN		tax						Save Char
				>LDA.G CSH.hBuf			Batch mode ?
				beq .10
* Batch Mode
				cpx #3					test Ctrl-c
				bne .12

				>LDA.G bExitOnEOF
				>STA.G bExit
				clc
				rts

.12				cpx #19					test Ctrl-s
				bne .8

				lda #$80
				>STA.G bPause
				clc
				rts
*--------------------------------------
* interactive mode
.10				>LDA.G bEscMode
				beq .13

				cpx #'['
				beq .8

				lda #0
				sta (pData),y			Y=bEscMode
				txa

				ldx #EscChars.count-1

.17				cmp EscChars,x
				beq .18
				dex
				bpl .17
				clc
				rts

.18				txa
				asl
				tax
				jmp (J.ESC,x)
*--------------------------------------
.13				cpx #$20
				bcc CS.CHARIN.CTRL

.1				cpx #$7f
				bne .2
				jmp CmdLine.DEL

.2				>LDA.G CmdBuflen
				cmp #CmdLine.MAX
				beq .8					Buffer full, discard...

				inc
				sta (pData),y

				clc						Len-1-Ptr !!!!!
				>SBC.G CmdBufPtr
				beq .30
				
				phx
				tax
				>LDA.G CmdBuflen
				tay
							
.3				lda (ZPCMDBuf),y		Move from Ptr To end of buffer forward...
				iny
				sta (ZPCMDBuf),y
				dey
				dey
				dex
				bne .3
				plx
		
.30				>LDA.G CmdBufPtr		Insert char at Ptr
				tay
				txa
				sta (ZPCMDBuf),y
				>SYSCALL PutChar.A
				
				>INC.G CmdBufPtr
				>CMP.G CmdBuflen
				bne .8
				
				tay
				lda #0
				sta (ZPCMDBuf),y
				
				clc
				rts
				
.8				jmp CmdLine.PRINTPTR
*--------------------------------------
CS.CHARIN.CTRL	
				cpx #13					CR
				bne .10

				txa
				>SYSCALL PutChar.A
				lda #10
				>SYSCALL PutChar.A

				>LDA.G CmdBufPtr
				tay
				lda #0
				sta (ZPCMDBuf),y
				tya
				>STA.G CmdBuflen
				
				lda #$ff
				>STA.G bCmdBufexec
				clc
				rts

.10				cpx #$1B				esc
				bne .11
				
				lda #$ff
				>STA.G bEscMode
				clc
				rts

.11				cpx #3					Ctrl-C
				bne .8

				jsr CmdLine.CLR
				clc
				rts

.8				clc
				rts
*--------------------------------------
CS.QUIT			jsr HIS.Quit
				jsr CSH.Quit
				jsr CMD.Quit
				clc
				rts
*--------------------------------------
CheckSleep		ldy #Sleep+3
				lda (pData),y
				dey
				ora (pData),y
				dey
				ora (pData),y
				dey
				ora (pData),y
				rts
*--------------------------------------
SetPWD			ldy #S.PS.hPREFIX
				lda (pPs),y
				>SYSCALL GetMemPtr.A
				>PUSHYA
				>PUSHW L.ENV.PWD
				>SYSCALL SetEnv
				rts
*--------------------------------------
				.INB /A2OSX.SRC/SBIN/SHELL.S.CL
				.INB /A2OSX.SRC/SBIN/SHELL.S.CMD
				.INB /A2OSX.SRC/SBIN/SHELL.S.CSH
				.INB /A2OSX.SRC/SBIN/SHELL.S.IO
				.INB /A2OSX.SRC/SBIN/SHELL.S.HIS
*--------------------------------------
CS.END
*--------------------------------------
ENV.PATH		>CSTR "PATH"
ENV.PWD			>CSTR "PWD"
ENV.PS1			>CSTR "PS1"
ENV.HOME		>CSTR "HOME"
*--------------------------------------
INTCMDS			>CSTR "CD"
				>CSTR "DATE"
				>CSTR "ECHO"
				>CSTR "EXIT"
				>CSTR "PAUSE"
				>CSTR "PWD"
				>CSTR "READ"
				>CSTR "SET"
				>CSTR "SLEEP"
				>CSTR "STARTPROC"
				>CSTR "TIME"
				.HS 00
*--------------------------------------
OPChars.Count	.EQ 14
CSH.OPChars		>PSTR "!~+-*/%=&|^&<>"
*--------------------------------------
* Pre Operators:  + - ! ~ ++ --
*--------------------------------------
CSH.PREOOPS		>PSTR "+"
				>PSTR "-"
				>PSTR "!"
				>PSTR "~"
*--------------------------------------
* Post Operators: ++ -- 
*--------------------------------------
CSH.POSTOPS		>PSTR "++"
				>PSTR "--"
				.HS 00				
*--------------------------------------
* Assignment Operators: = += -= *= /= %= <<= >>= &= ^= |=
*--------------------------------------
CSH.AOPS		>PSTR "="
				>PSTR "+="
				>PSTR "-="
				>PSTR "*="
				>PSTR "/="
				>PSTR "%="
				>PSTR "<<="
				>PSTR ">>="
				>PSTR "&="
				>PSTR "^="
				>PSTR "!="
				.HS 00
*-- Binary ---- H to L prececence -----
* Arithmetic Operators: * / %
* Arithmetic Operators: + -
* Shift Operators: << >>
* Relational Operators: < > >= < >= == !=
* Bitwise Operators: & | ^ ~
* Logical Operators: && ||
*--------------------------------------
CSH.BOPS		>PSTR "+"
				>PSTR "-"
				>PSTR "*"
				>PSTR "/"
				>PSTR "%"
				>PSTR "<<"
				>PSTR ">>"
				>PSTR "<"
				>PSTR ">"
				>PSTR "<="
				>PSTR ">="
				>PSTR "=="
				>PSTR "!="
				>PSTR "&"
				>PSTR "|"
				>PSTR "^"
				>PSTR "&&"
				>PSTR "||"
				.HS 00
*--------------------------------------
* Reserved Keywords:
*--------------------------------------
CSH.KEYWORDS	>PSTR "if"
				>PSTR "while"
				>PSTR "else"
				>PSTR "do"
				>PSTR "for"
				>PSTR "switch"
				>PSTR "case"
				>PSTR "break"
				>PSTR "continue"		
CSH.TYPES		>PSTR "char"
				>PSTR "int"
				>PSTR "long"
				>PSTR "float"
				.HS 00
*--------------------------------------
* int printf ( const char * format, ... );
CSH.FUNCTIONS	>PSTR "printf"
* float cos ( float x );
				>PSTR "cos"
*--------------------------------------
MSG.GREETINGS	>CSTR "\r\nA2osX-Shell 0.9.1\r\n\r\n"
MSG.PROMPT		>CSTR "$ "
MSG.ECHO		>CSTR ">%s\r\n"
MSG.ERROR		>CSTR "[$%h]:%S.\r\n"
MSG.PRINTENV	>CSTR "%s=%s\r\n"
MSG.CSHERR		>CSTR "^\r\nLine #%D:"
FMT.DATE		>CSTR "%A, %B %d %Y"
FMT.TIME		>CSTR "%H:%M:%S (%I:%M:%S%p)"
*--------------------------------------
				.INB /A2OSX.SRC/X.ERRORS.S
*--------------------------------------
EscChars.Count	.EQ 4
EscChars		.AS 'DBAC'

CSH.TSIZE		.HS 0001020405			VOID,CHAR,INT,LONG,FLOAT....
*--------------------------------------
				.DUMMY
				.OR 0
DS.START
hCmdBuf			.BS 1
CmdBufPtr		.BS 1
CmdBuflen		.BS 1
bCmdBufexec		.BS 1

bEscMode		.BS 1
bPause			.BS 1
bExit			.BS 1
bEcho			.BS 1
bExitOnEOF		.BS 1

bReadMode		.BS 1
bSecureRead		.BS 1

Sleep			.BS 4

CMD.hCmdLine	.BS 1
CMD.hFullpath	.BS 1
CMD.bStartProc	.BS 1
CMD.VarName		.BS VarLen.MAX+1
CMD.Stat		.BS S.STAT
CMD.Time		.BS S.TIME

HIS.hBuf		.BS 1
HIS.Count		.BS 1
HIS.Index		.BS 1

IO.hIn			.BS 1
IO.hOut			.BS 1
IO.hErr			.BS 1

CSH.hBuf		.BS 1
CSH.BufPtrSave	.BS 2

CSH.LineNum		.BS 2

CSH.hSymbols	.BS 1
CSH.SymbolsPtr	.BS 1

CSH.hData		.BS 1
CSH.DataPtr		.BS 1

CSH.hStack		.BS 1
CSH.StackPtr	.BS 1

CSH.CmdSave		.BS 1

CSH.ACCT		.BS 1
CSH.ACC			.BS 5

CSH.EXPBOP1		.BS 1

CSH.ARGT		.BS 1
CSH.ARG			.BS 5

CSH.EXPBOP2		.BS 1

DS.END			.ED
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SBIN/SHELL.S
ASM