A2osX/SBIN/SHELL.S.CL.txt

NEW
PREFIX /A2OSX.BUILD
AUTO 4,1
				.LIST OFF	
*--------------------------------------
CL.PrintPrompt	>LDYA L.ENV.PS1
				>SYSCALL GetEnv
				bcs .1
				
				>SYSCALL ExpandStr
				bcs .9
				
				phx
				pha
				>PUSHBI 0
				pla
				>SYSCALL printf
				pla
				>SYSCALL FreeMem
				
.1				>PUSHBI 0
				>LDYA L.MSG.PROMPT
				>SYSCALL printf
.9				rts
*--------------------------------------
CL.CHARIN		tax

				>LDA.G bEscMode
				beq .13

				cpx #'['
				beq .9

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

				ldx #EscChars.Cnt-1

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

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

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

.2				jmp CL.Insert

.9				clc
				rts
*--------------------------------------
CL.CHARIN.CTRL	cpx #C.CR
				bne .10

				>PUSHBI 0
				>LDYA L.MSG.ECHOCRLF
				>SYSCALL printf

				>LDA.G CL.Ptr
				tay
				lda #0
				sta (ZPCLBuf),y
				tya
				>STA.G CL.Len
				
				lda #$ff
				>STA.G CL.bExec
				clc
				rts

.10				cpx #C.ESC
				bne .11
				
				lda #$ff
				>STA.G bEscMode
				clc
				rts

.11				cpx #3					Ctrl-C
				bne .12

				jmp CL.CLR
								
.12				cpx #24					Ctrl-X
				bne .13
				
				jmp CL.SUPPR
				
.13				clc				
				rts
*--------------------------------------
CL.Insert		>LDA.G CL.Len
				cmp #CL.MAX
				beq .9					Buffer full, discard...

				inc
				sta (pData),y

				pha
				
.1				ply
				dey
				lda (ZPCLBuf),y		Move from Ptr To end of buffer forward...
				iny
				sta (ZPCLBuf),y
				dey
				phy
				tya
				>CMP.G CL.Ptr
				bne .1
				
				ply						Y=CL.Ptr				
				
*				>LDA.G CL.Ptr

				txa
				sta (ZPCLBuf),y
				
				>LDA.G bREAD.S
				bpl .2
				ldx #'*'
				
.2				txa				
				>SYSCALL PutChar
				
				>INC.G CL.Ptr
				
				jmp CL.PrintEOL
				
.9				clc
				rts
*--------------------------------------
CL.CLR			lda (ZPCLBuf)
				beq CL.RESET.1

				ldy #0

.1				lda #$7F
				sta (ZPCLBuf),y

				iny
				lda (ZPCLBuf),y
				bne .1

				jsr CL.PrintCmdBuf
*--------------------------------------
CL.RESET		lda #0
				sta (ZPCLBuf)
CL.RESET.1		>STA.G CL.bExec
				>STA.G CL.Ptr
				>STA.G CL.Len
				rts
*--------------------------------------
CL.BS			>LDA.G CL.Ptr
				beq .9
				
				dec
				sta (pData),y
				
				lda #C.BS
				>SYSCALL PutChar
.9				rts
*--------------------------------------
CL.NAK			>LDA.G CL.Ptr
				>CMP.G CL.Len
				beq .9
				
				inc
				>STA.G CL.Ptr
				
				lda #C.FS
				>SYSCALL PutChar		
.9				rts
*--------------------------------------
* Erase char UNDER cursor
*--------------------------------------
CL.SUPPR		>LDA.G CL.Len
				beq CL.PrintEOL.8
				
				>LDA.G CL.Ptr
				bra CL.DEL.1
*--------------------------------------
* Erase char BEFORE cursor
*--------------------------------------
CL.DEL			>LDA.G CL.Len
				beq CL.PrintEOL.8
				
				>LDA.G CL.Ptr
				beq CL.PrintEOL.8

				lda #C.BS
				>SYSCALL PutChar

				>DEC.G CL.Ptr
				
CL.DEL.1		pha
				
.1				ply
				iny
				lda (ZPCLBuf),y
				dey
				sta (ZPCLBuf),y
				iny
				phy
				tya
	
				>CMP.G CL.Len
				bne .1
				
				pla
				
				>DEC.G CL.Len
*--------------------------------------
CL.PrintEOL		>LDA.G CL.Ptr
						
.1				>CMP.G CL.Len
				beq .2
				
				pha
				tay
				lda (ZPCLBuf),y
				>SYSCALL PutChar
				pla
				inc
				bra .1

.2				lda #' '
				>SYSCALL PutChar
				
				>LDA.G CL.Ptr
				
.3				>CMP.G CL.Len
				beq .4
				
				pha
				
				lda #C.BS
				>SYSCALL PutChar
				pla
				inc
				bra .3
				
.4				lda #C.BS
				>SYSCALL PutChar

CL.PrintEOL.8	clc				
				rts
*--------------------------------------
CL.PrintCmdBuf	>LDYA ZPCLBuf
				>PUSHYA
				ldy #S.PS.hStdOut
				lda (pPs),y
				>SYSCALL fputs
				rts
*--------------------------------------
CL.GetLine		lda (ZPFileBufPtr)
				beq .9
							
				ldy #0
				
.1				lda (ZPFileBufPtr),y
				beq .7
				
				cmp #C.CR
				beq .6
				
*				cmp #';'
*				beq .6

				sta (ZPCLBuf),y
				iny
				cpy #CL.MAX
				bne .1
				
				lda #E.SYN				Line Too long !!!
*				sec
				rts
				
.6				sec						skip CR or ;
				.HS 90					BCC
				
.7				clc
				
				tya
				adc ZPFileBufPtr
				sta ZPFileBufPtr
				bcc .8
				inc ZPFileBufPtr+1
				
.8				lda #0
				sta (ZPCLBuf),y
				
				tya
				>STA.G CL.Len
				lda #$ff
				>STA.G CL.bExec

				clc
				rts
				
.9				lda #C.EOF
				sec
				rts
*--------------------------------------
* in:
* ZPCLBuf : CString command line
* out:
* ZPArgVBuf : 
* /path/excmd\0 arg1\0 arg2\0 ... \0
* - or -
* intcmd\0 arg1\0 arg2\0 ... \0
*--------------------------------------
CL.Parse		>STZ.G CMD.IntCmd

				lda #S.PS.F.HOLD+S.PS.F.DUPENV
				>STA.G CMD.PSFlags

				>PUSHW ZPCLBuf
				>LDYA ZPCLBuf
				>STYA ZPCLBufPtr

				>SYSCALL Args2ArgV
				
				lda #0
				sta (ZPArgVBuf)
				
				lda (ZPCLBufPtr)
				beq .8
				
.1				cmp #'#'				comment ?
				beq .8					yes, ignore remaining

				>LDA.G CMD.IntCmd
				bne .3					we already have Cmd, go check args
				
				ldy #1
				lda (ZPCLBufPtr),y		only one char ?
				bne .2
				
				lda (ZPCLBufPtr)
				cmp #'.'				leading dot ?
				bne .2
				
				>LDA.G CMD.PSFlags		yes, child process will run in same ENV
				and #$ff^S.PS.F.DUPENV
				sta (pData),y
				bra .6					and skip this token
				
.2				jsr CL.CheckCmd
				bcc .6					success, skip token, already added by CheckCmd

				rts
				
.3				jsr CL.CheckIO
				bcc .7					IO token & related args processed
				tay						an error ?
				bne .9					yes...I/O error...
				
				jsr CL.AddCLBufPtrToArgV	no...add as an arg
				bcs .9

.6				jsr CL.NextCLToken
.7				lda (ZPCLBufPtr)
				bne .1
				
.8				clc
				
.9				rts				
*--------------------------------------
* ZPCLBuf-> argv[] (formatted & not empty)
*--------------------------------------
CL.CheckCmd		ldy #$ff

.1				iny
				lda (ZPCLBufPtr),y
				beq .2
				cmp #'/'
				bne .1
				
				>LDYA ZPCLBufPtr			found /, some path specified, External, no search
				>SYSCALL realpath
				bcs .9

				txa
				>STA.G CMD.hCmdLine
				bra .6					go check type...
				
.2				>PUSHW ZPCLBufPtr
				>LDYA L.CMD.INT
				jsr Lookup				no / found, search internal...
				bcs .4					not internal, search PATH
				
				phx
				plx
				bne .3
				
				>LDA.G CMD.PSFlags		if STARTPROC, skip keyword...
				and #$ff^S.PS.F.HOLD
				sta (pData),y			...and toggle S.PS.F.HOLD flag
				clc
.9				rts
				
.3				jsr CL.AddYAToArgV		X unmodified
				bcs .9

				txa
				>STA.G CMD.IntCmd

				clc
				rts

.4				>LDYAI 256				Get a buffer for found path
				>SYSCALL GetMem
				bcs .9
				
				txa
				>STA.G CMD.hCmdLine
				
				>LDYA L.ENV.PATH		push ENVNAME=PATH for search
				>SYSCALL GetEnv			get value for ENV=PATH
				bcs .5					no PATH, try workdir

				jsr CL.SearchExt
				bcc .6					found in PATH, go check Type

.5				ldy #S.PS.hPREFIX		not found, try in CD
				lda (pPs),y
				>SYSCALL GetMemPtr
				jsr CL.SearchExt

				bcs CL.CheckCmd.90
				
.6				>PUSHEA.G CMD.Stat
				>LDA.G CMD.hCmdLine
				>SYSCALL GetMemPtr
				>SYSCALL STAT
				bcs CL.CheckCmd.90
				
				lda #$ff
				>STA.G CMD.IntCmd
				
				ldy #CMD.Stat+S.STAT.P.TYPE
				lda (pData),y
				cmp #S.FI.T.TXT
				beq CL.CheckCmd.TXT
				cmp #S.FI.T.BIN
				beq CL.CheckCmd.BIN
				cmp #S.FI.T.SYS
				beq	CL.CheckCmd.SYS
				
				lda #E.SYN
				sec
				
CL.CheckCmd.90	php
				pha
				>LDA.G CMD.hCmdLine
				>SYSCALL FreeMem
				pla
				
				plp
CL.CheckCmd.RTS
				rts
*--------------------------------------
* TXT : add "/PATH/SHELL" "/PATH/CMD"
*--------------------------------------
CL.CheckCmd.TXT	lda #0
				>SYSCALL ArgV
				jsr CL.AddYAToArgV
				bcs CL.CheckCmd.90
*--------------------------------------
* BIN : add "/PATH/CMD"
*--------------------------------------
CL.CheckCmd.BIN	>LDA.G CMD.hCmdLine
				>SYSCALL GetMemPtr
				jsr CL.AddYAToArgV

				bra CL.CheckCmd.90
*--------------------------------------
CL.CheckCmd.SYS bra *
*--------------------------------------
CL.SearchExt	pha
				phy
				>PUSHEA.G CMD.Stat
				>LDA.G CMD.hCmdLine
				>SYSCALL GetMemPtr
				>PUSHYA					push dest full path
				ply
				pla
				>PUSHYA					push search list
				>LDYA ZPCLBufPtr		push CMD
				>SYSCALL FileSearch
				rts
*--------------------------------------
CL.CheckIO		>PUSHW ZPCLBufPtr
				>LDYA L.CL.IO
				jsr Lookup
				bcs .9					not a IO token...should be an arg....
				phx
				
				jsr CL.NextCLToken		skip this IO token
				
				plx
				jmp (J.CL.IO,x)

.9				lda #0
				rts
*--------------------------------------
CL.IO.AMP		>LDA.G CMD.PSFlags
				and #$ff^S.PS.F.HOLD
				sta (pData),y
				clc
				rts

CL.IO.PIPE
				clc
				rts
				
CL.IO.IN		lda #O.RDONLY+O.TEXT
				jsr CL.IO.Open
				bcs .9
				jsr IO.Set.In

				jsr CL.NextCLToken 		skip arg
				clc
.9				rts
				
CL.IO.OUTA
CL.IO.1OUTA		lda #O.WRONLY+O.APPEND+O.CREATE+O.TEXT
				bra CL.IO.OUT.1
CL.IO.OUT		
CL.IO.1OUT		lda #O.WRONLY+O.TRUNC+O.CREATE+O.TEXT

CL.IO.OUT.1		jsr CL.IO.Open
				bcs .9
				jsr IO.Set.Out

				jsr CL.NextCLToken 		skip arg
				clc	
.9				rts

CL.IO.2OUTA		lda #O.WRONLY+O.APPEND+O.CREATE+O.TEXT
				bra CL.IO.2OUT.1
CL.IO.2OUT		lda #O.WRONLY+O.TRUNC+O.CREATE+O.TEXT

CL.IO.2OUT.1	jsr CL.IO.Open
				bcs .9
				jsr IO.Set.Err

				jsr CL.NextCLToken	 	skip arg
				clc
.9				rts
*--------------------------------------
CL.IO.Open		pha
				lda (ZPCLBufPtr)
				beq .9					no arg left....
				
				>PUSHWI 0				Aux type
				>PUSHBI S.FI.T.TXT		ftype
				pla
				>PUSHA					flags
				>LDYA ZPCLBufPtr
				>SYSCALL fopen
				rts
				
.9				pla
				lda #E.SYN
				sec
				rts				
*--------------------------------------
CL.NextCLToken
				lda (ZPCLBufPtr)
				inc ZPCLBufPtr
				bne .1
				inc ZPCLBufPtr+1
.1				tax
				bne CL.NextCLToken
				rts
*--------------------------------------
CL.AddCLBufPtrToArgV
				>LDYA ZPCLBufPtr
CL.AddYAToArgV	>STYA ZPPtr1

				>LDYA ZPArgVBuf
				>STYA ZPPtr2
				
.1				lda (ZPPtr2)			scan to end of argV
				beq .6

.2				inc ZPPtr2
				bne .3
				inc ZPPtr2+1
.3				lda (ZPPtr2)
				bne .2

				inc ZPPtr2
				bne .4
				inc ZPPtr2+1
.4				lda (ZPPtr2)
				bne .2
				
.6				ldy #$ff

.7				iny
*				beq .9
				lda (ZPPtr1),y
				sta (ZPPtr2),y
				bne .7					including str ending \0

				iny
*				beq .9
				sta (ZPPtr2),y			arg[] ending \0
				
				clc
				rts
				
.9				lda #E.BUF	
				sec				
				rts
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SBIN/SHELL.S.CL
LOAD /A2OSX.SRC/SBIN/SHELL.S
ASM