A2osX/SBIN/SHELL.S.txt

PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
				.LIST OFF
				.OP	65C02
				.OR	$2000
				.TF /A2OSX.BOOT/SBIN/SHELL
*--------------------------------------
				.INB INC/MACROS.I
				.INB INC/PRODOS.I
				.INB INC/A2OSX.I
				.INB INC/LIBSTR.I
*--------------------------------------
ZPPTR1			.EQ ZPBIN
ZPPTR2			.EQ ZPBIN+2
ZPPTR3			.EQ ZPBIN+4
*--------------------------------------
CmdBuffer.MAX	.EQ 127
*--------------------------------------
*			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		Code Length To Relocate
				.DA DS.END-DS.START		Data Segment to Allocate
				.DA 0
				.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1				.DA CS.INIT
				.DA CS.RUN
				.DA CS.DOEVENT
				.DA	CS.QUIT
*--------------------------------------
L.LIBSTR		.DA LIBSTR
L.MSG.GREETINGS	.DA MSG.GREETINGS
L.MSG.ERROR		.DA MSG.ERROR
L.ENV.PATH		.DA ENV.PATH
J.INTCMDS		.DA EXEC.CMD.CD
				.DA EXEC.CMD.DATE
				.DA EXEC.CMD.ECHO
				.DA EXEC.CMD.EXIT
				.DA EXEC.CMD.PAUSE
				.DA EXEC.CMD.READ
				.DA EXEC.CMD.SET
				.DA EXEC.CMD.STARTPROC
				.DA EXEC.CMD.TIME
				.DA EXEC.CMD.TYPE
				.DA 0
*--------------------------------------
CS.INIT			>LDYA L.LIBSTR
				>SYSCALL SYS.LoadLibYA
				bcs .9
				sta hLIBSTR
				
				ldy #S.PS.hARGS			Batch file ?
				lda (pPs),y
				beq CS.INIT.INTERACTIVE	no,continue starting interactive

				jsr OpenTxtFileA
				bcs .9
				
				ldy #bExitOnEOF
				lda #$FF
				sta (pData),y
				clc
.9				rts
*--------------------------------------
CS.INIT.INTERACTIVE
				jsr History.Init
				bcs .9
				
				ldy #S.PS.hINDEV
				lda (pPs),y
				>PUSHA
				>LDYA L.MSG.GREETINGS
				>SYSCALL SYS.PSTROutYA
				
				lda (pPs)
				ora #S.PS.F.EVENT		Now accept events
				sta (pPs)
								
				clc
.9				rts				
*--------------------------------------
CS.RUN			lda #0
				sta (pData)
				
				ldy #bPause
				lda (pData),y
				bpl .10
				clc
				rts

.10				ldy #hInputFile			batch mode ?
				lda (pData),y
				bne .2
				
				jsr PrintPrompt
				bcs .99
				
.1				>SYSCALL SYS.Sleep
				lda (pData)
				bpl .1

				and #$7F
				sta (pData)
				bra .3

.2				jsr	ReadTxtFile
				bcs .81
				
.3				lda (pData)
				beq CS.RUN				Empty line

				ldy #1
				lda (pData),y
				cmp #'#'				Comment
				beq CS.RUN
				
				ldy #hInputFile
				lda (pData),y
				bne .32
				
				jsr History.Add

.32				>LDYA pData
				>SYSCALL SYS.NewPStrYA
				bcs .99
				
				ldy #hCmdLine
				sta (pData),y
				jsr EXEC.CMD
				bcc .4
				tay
				beq .4
				jsr PrintError

.4				ldy #hCmdLine
				lda (pData),y
				>SYSCALL SYS.FreeMemA
				ldy #hCmdLine
				lda #0
				sta (pData),y
				
.8				ldy	#bEXIT
				lda (pData),y
				bne .99
				
				clc
				rts

.81				jsr CloseTxtFile
				ldy #bExitOnEOF
				lda (pData),y
				beq .8
				lda #0
.99				sec
				rts	
*--------------------------------------
CS.DOEVENT		ldy #S.EVT.hDEV		is Event from active IN device?
				lda (pEvent),y
				ldy #S.PS.hINDEV
				cmp (pPs),y
				bne .9

				lda (pEvent)
				and #S.EVT.F.KEY		is it a KEY event?
				beq .9

				ldy #S.EVT.DATAHI		is it an O or SAPPLE key ?
				lda (pEvent),y
				bne	.9

				ldy #S.EVT.DATALO	
				lda (pEvent),y
				tax
				
				ldy #bPause
				lda (pData),y
				bpl .11
				
				lda #0
				sta (pData),y
				clc
				rts
				
.9				sec
				rts
				
.11				ldy #hInputFile			Batch mode ?
				lda (pData),y
				beq .10
* Batch Mode			
				cpx #3					test Ctrl-c
				bne .12
				
				jsr CloseTxtFile
				ldy #bExitOnEOF
				lda (pData),y
				ldy #bExit
				sta (pData),y
				clc
				rts

.12				cpx #19					test Ctrl-s
				bne .8
				ldy #bPause
				lda #$80
				sta (pData),y
				clc
				rts
				
* interactive mode				
.10				ldy #bEscMode
				lda (pData),y
				beq .13
				
				cpx #'['
				beq .8
				
				lda #0
				sta (pData),y
				
				txa

				ldx EscChars
.17				cmp EscChars,x
				beq .18
				dex
				bne .17
				bra .8
				
.18				lda EscAscii,x				
				tax
				
.13				cpx #$20
				bcs .1
				jsr CS.EVENT.CTRL.CHAR
				bra .8

.1				cpx #$7f
				bne .2
				jsr CmdBuffer.DEL
				clc
				rts

.2				lda (pData)				CmdBuffer
				
				cmp #CmdBuffer.MAX
				beq .8
				
				inc
				sta (pData)
				tay
				txa
				sta (pData),y

				>SYSCALL SYS.COutA
				
.8				clc
				rts	
*--------------------------------------
CS.EVENT.CTRL.CHAR
				cpx #13					CR
				bne .10
				txa
				>SYSCALL SYS.COutA
				lda (pData)				CmdBuffer
				ora #$80
				sta (pData)
				clc
				rts
				
.10				cpx #$1B				esc
				bne .11
				
				ldy #bEscMode
				lda #$ff
				sta (pData),y
				clc
				rts

.11				cpx #3					Ctrl-C
				bne .1

				jsr CmdBuffer.CLR
				clc
				rts
				
.1				cpx #8					BS (left arrow)
				bne .2
				jsr CmdBuffer.DEL
				clc
				rts
				
.2				cpx #10					LF (down arrow)
				bne .3
				
				jsr HISTORY.GETNEXT
				clc
				rts
				
.3				cpx #11					VT (up arrow)
				bne .4
				
				jsr HISTORY.GETPREV
				clc
				rts
				
.4				cpx #21					NAK (right arrow)
				bne .8
				
				clc
				rts
				
.8				clc
				rts
*--------------------------------------
CS.QUIT			jsr History.Quit

				ldy #hInputFile
				lda (pData),y
				beq .1
				>SYSCALL SYS.MLICloseA

.1				ldy #hInputBuffer
				lda (pData),y
				beq .2
				>SYSCALL SYS.FreeMemA

.2				lda hLIBSTR
				>SYSCALL SYS.UnloadLibA
				clc
				rts
*--------------------------------------
*				PRIVATE
*--------------------------------------
PrintPrompt		lda #'$'
				>SYSCALL SYS.COutA
				bcs .9
				lda #' '
				>SYSCALL SYS.COutA
.9				rts
*--------------------------------------
PrintError		pha
				>PUSHA
				>LDYA L.MSG.ERROR
				>SYSCALL SYS.PSTROutYA
				pla
				rts
*--------------------------------------
CmdBuffer.PRINT	ldy #0
.1				iny
				lda (pData),y
				>SYSCALL SYS.COutA
				tya
				cmp (pData)
				bne .1
				rts
*--------------------------------------
CmdBuffer.CLR	jsr CmdBuffer.DEL
				bne CmdBuffer.CLR
				rts
*--------------------------------------
CmdBuffer.DEL	lda (pData)
				beq .9
				lda #8
				>SYSCALL SYS.COutA
				lda (pData)
				dec
				sta (pData)
.9				rts
*--------------------------------------
OpenTxtFileA	>SYSCALL SYS.MLIOpenA
				bcs .9
				
				ldy #hInputFile
				sta (pData),y
				pha
				txa
				ldy #hInputBuffer
				sta (pData),y
				
				>PUSHBI $0D		Line separator for TXT file
				>PUSHBI $FF
				pla
				>PUSHA
				>SYSCALL SYS.MLINewLine
				bcc .9
				pha
				jsr CloseTxtFile
				pla
				sec
.9				rts
*--------------------------------------
ReadTxtFile		>PUSHWI 127
				>PUSHWI TmpBuffer256+1
				ldy #hInputFile
				lda (pData),y
				>PUSHA
				>SYSCALL SYS.MLIRead
				bcs .9

				tya
				beq .10
				
				lda TmpBuffer256,y		Y,A=Bytes read
				cmp #$0D
				bne .10

				dey
				
.10				tya
				sta (pData)
				beq .2

.1				lda TmpBuffer256,y
				sta (pData),y
				dey
				bne .1
				
.2				ldy #bEcho
				lda (pData),y
				beq .8

				lda #'>'
				>SYSCALL SYS.COutA
				lda #'"'
				>SYSCALL SYS.COutA
				>LDYA pData
				>SYSCALL SYS.PSTROutYA
				lda #'"'
				>SYSCALL SYS.COutA
				lda #13
				>SYSCALL SYS.COutA
				
.8				clc
.9				rts
*--------------------------------------
CloseTxtFile	ldy #hInputArgs
				lda (pData),y
				beq .1
				>SYSCALL SYS.FreeMemA

.1				ldy #hInputFile
				lda (pData),y
				beq .9
				
				>SYSCALL SYS.MLICloseA
				ldy #hInputBuffer
				lda (pData),y
				>SYSCALL SYS.FreeMemA

.9				lda #0
				ldy #hInputArgs
				sta (pData),y
				ldy #hInputFile
				sta (pData),y
				ldy #hInputBuffer
				sta (pData),y
				rts
*--------------------------------------
				.INB SBIN/SHELL.S.CMD
				.INB SBIN/SHELL.S.HIS
*--------------------------------------
CS.END
*--------------------------------------
ENV.PATH		>PSTRING "PATH"
CMDS			>PSTRING "CD"
				>PSTRING "DATE"
				>PSTRING "ECHO"
				>PSTRING "EXIT"
				>PSTRING "PAUSE"
				>PSTRING "READ"
				>PSTRING "SET"
				>PSTRING "STARTPROC"
				>PSTRING "TIME"
				>PSTRING "TYPE"
				.HS 00
*--------------------------------------
LIBSTR			>PSTRING "libstr.o"
MSG.GREETINGS	>PSTRING "\nA2osX-Shell on Dev=%h\n\n"
MSG.ERROR		>PSTRING "[%h]\n"
*MSG.NOTFOUND	>CSTRING "Command Not Found\n"
*MSG.SYNERR		>CSTRING "Syntax Error Or Invalid Pathname\n"
EscChars		>PSTRING "DBAC"
EscAscii		.HS 04080A0B15
hLIBSTR			.BS 1
hNEWPATH		.BS 1
hExecCmd		.BS 1
hExecArgs		.BS 1
hEnvPath		.BS 1
hFullCmd		.BS 1
hVarName		.BS 1
hVarValue		.BS 1
ExecCmdIdx		.BS 1
ExecCmdMode		.BS 1
*--------------------------------------
				.DUMMY
				.OR 0
DS.START
CmdBuffer		.BS CmdBuffer.MAX+1		(pData)
bEscMode		.BS 1
bPause			.BS 1
bExit			.BS 1
bEcho			.BS 1
bExitOnEOF		.BS 1
hCmdLine		.BS 1
hCmdHistory		.BS 1
CmdHistory.IDX	.BS 1
CmdHistory.END	.BS 1
hInputFile		.BS 1
hInputArgs		.BS 1
hInputBuffer	.BS 1
DS.END
				.ED
*--------------------------------------
MAN
SAVE SBIN/SHELL.S
ASM