A2osX/BIN/SH.S.CL.txt
2020-08-11 20:55:28 +02:00

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NEW
AUTO 3,1
.LIST OFF
*--------------------------------------
CL.Init >LDYAI 256
>SYSCALL GetMem
bcs .9
>STYA ZPCLBuf
txa
>STA.G CL.hCLBuf
.9 rts
*--------------------------------------
CL.PrintPrompt >PUSHW L.PS1
>PUSHWI 0
>SYSCALL Expand
bcs .9
phx
>PUSHYA
>PUSHBI 0
>SYSCALL PrintF
pla
>SYSCALL FreeMem
.1 >PUSHW L.MSG.PROMPT
>PUSHBI 0
>SYSCALL PrintF
.9 rts
*--------------------------------------
CL.READN0A tax
CL.READN0X
>PUSHW ZPCLBuf
>PUSHW L.FMT.Byte
txa
>PUSHA
>PUSHBI 1
>SYSCALL SPrintF
bcs .9
lda #$ff
>STA.G CL.bReady
* clc
.9 rts
*--------------------------------------
CL.CHARIN tax
>LDA.G CL.bEscMode \e ?
beq .4
cpx #'['
beq .8 \e[
lda #0
sta (pData),y Y=bEscMode
txa
ldx #EscChars.Cnt-1
.1 cmp EscChars,x
beq .2
dex
bpl .1
.8 rts invalid \e[ sequence
.2 >LDA.G READ.N
bne .3
lda EscChars.Remap,x
bra CL.READN0A
.3 txa
asl
tax
jmp (J.ESC,x)
*--------------------------------------
.4 cpx #C.ESC
bne .5
lda #$ff
>STA.G CL.bEscMode
clc
rts
.5 >LDA.G READ.N
beq CL.READN0X
cpx #C.SPACE
bcc CL.CHARIN.CTRL
cpx #C.DEL
bne CL.Insert
*--------------------------------------
* Erase char BEFORE cursor
*--------------------------------------
>LDA.G CL.Len
beq .8
>LDA.G CL.Ptr
beq .8
>LDA.G bREAD.S
bmi .6
lda #C.BS
>SYSCALL PutChar
.6 >DEC.G CL.Ptr
jmp CL.DEL
*--------------------------------------
CL.Insert >LDA.G CL.Len
>CMP.G READ.N
beq .8 Buffer full, discard...
inc
>STA.G CL.Len
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
>INC.G CL.Ptr
>LDA.G bREAD.S
bmi .7
txa
>SYSCALL PutChar
jsr CL.PrintEOL
.7 >LDA.G READ.N READ N = 1, don't wait for CR
dec
bne .8
lda #$ff
>STA.G CL.bReady
.8 clc
rts
*--------------------------------------
CL.CHARIN.CTRL cpx #C.CR
beq .18
cpx #C.EOF
beq .18
cpx #3 Ctrl-C
beq CL.CLR
cpx #26 Ctrl-Z
bne .8
jmp CL.SUPPR
.18 jsr CheckLFAfterCR Check for any extra LF
bcs .9
lda #$ff
>STA.G CL.bReady
.8 clc
.9 rts
*--------------------------------------
CL.CLR lda (ZPCLBuf)
beq CL.Reset.1
>LDA.G bREAD.S
bmi CL.Reset.1
.1 >LDA.G CL.Ptr
>CMP.G CL.Len
beq .2
inc
>STA.G CL.Ptr
lda #C.FS
>SYSCALL PutChar
bra .1
.2 ldy #0
.3 lda #C.DEL
sta (ZPCLBuf),y
iny
lda (ZPCLBuf),y
bne .3
jsr CL.PrintCLBuf
*--------------------------------------
CL.Reset lda #0
sta (ZPCLBuf)
CL.Reset.1 >STA.G CL.Ptr
>STA.G CL.Len
>STA.G CL.bReady
>STA.G CL.bEscMode
rts
*--------------------------------------
CL.BS >LDA.G CL.Ptr
beq .9
dec
sta (pData),y
>LDA.G bREAD.S
bmi .9
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.G bREAD.S
bmi .9
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
>CMP.G CL.Len
beq CL.PrintEOL.8
*--------------------------------------
CL.DEL 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
>LDA.G bREAD.S
bpl CL.PrintEOL
clc
rts
*--------------------------------------
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 #C.SPACE
>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.PrintCLBuf >PUSHW ZPCLBuf
ldy #S.PS.hStdOut
lda (pPS),y
>SYSCALL FPutS
rts
*--------------------------------------
MAN
SAVE usr/src/bin/sh.s.cl
LOAD usr/src/bin/sh.s
ASM