mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-05-29 02:41:28 +00:00
575 lines
12 KiB
NASM
575 lines
12 KiB
NASM
**************************************************************************
|
|
*
|
|
* The GNO Shell Project
|
|
*
|
|
* Developed by:
|
|
* Jawaid Bazyar
|
|
* Tim Meekins
|
|
*
|
|
**************************************************************************
|
|
*
|
|
* HISTORY.ASM
|
|
* By Tim Meekins
|
|
*
|
|
* Routines for dealing with history buffers.
|
|
*
|
|
* History Data Structures:
|
|
*
|
|
* HistoryPtr -> historyRec [HistoryPtr is the most recent history]
|
|
*
|
|
* Where historyRec is:
|
|
*
|
|
* [+0] NextHistory: pointer to historyRec
|
|
* [+4] HistoryCmd: string of characters
|
|
*
|
|
**************************************************************************
|
|
|
|
keep o/history
|
|
mcopy m/history.mac
|
|
|
|
histNext gequ 0
|
|
histCmd gequ 4
|
|
|
|
;=========================================================================
|
|
;
|
|
; Add a C string to the head of the history buffer.
|
|
;
|
|
;=========================================================================
|
|
|
|
InsertHistory START
|
|
|
|
using HistoryData
|
|
using global
|
|
|
|
ptr2 equ 0
|
|
ptr equ ptr2+4
|
|
len equ ptr+4
|
|
space equ len+2
|
|
|
|
subroutine (4:cmd),space
|
|
|
|
pei (cmd+2)
|
|
pei (cmd)
|
|
jsr cstrlen
|
|
sta len
|
|
pea 0
|
|
clc
|
|
adc #4+1
|
|
pha
|
|
jsl ~NEW
|
|
sta ptr
|
|
stx ptr+2
|
|
ora ptr+2
|
|
beq putdone
|
|
|
|
inc lasthist
|
|
inc numhist
|
|
|
|
lda historyptr ;Set up linked list pointers
|
|
sta [ptr]
|
|
ldy #histNext+2
|
|
lda historyptr+2
|
|
sta [ptr],y
|
|
mv4 ptr,historyptr
|
|
|
|
pei (cmd+2)
|
|
pei (cmd)
|
|
pei (ptr+2)
|
|
clc
|
|
lda ptr
|
|
adc #4
|
|
pha
|
|
jsr copycstr
|
|
;
|
|
; Now, find out what the maximum history is and prune to that value
|
|
;
|
|
putdone anop
|
|
|
|
Read_Variable RVParm
|
|
lda buffer
|
|
and #$FF
|
|
beq alldone
|
|
Dec2Int (#buffer+1,@a,#0),@a
|
|
sta size
|
|
beq alldone
|
|
;
|
|
; Follow linked list until we reach size histories
|
|
;
|
|
mv4 historyptr,ptr
|
|
ldy #histNext+2
|
|
follow lda [ptr]
|
|
tax
|
|
ora [ptr],y
|
|
beq alldone ;not enough
|
|
dec size
|
|
beq prune
|
|
lda [ptr],y
|
|
sta ptr+2
|
|
stx ptr
|
|
bra follow
|
|
;
|
|
; we have enough, start pruning
|
|
;
|
|
prune lda [ptr]
|
|
sta ptr2
|
|
lda [ptr],y
|
|
sta ptr2+2
|
|
lda #0
|
|
sta [ptr]
|
|
sta [ptr],y ;terminate last history
|
|
;
|
|
; Dispose remaining
|
|
;
|
|
dispose lda ptr2
|
|
ora ptr2+2
|
|
beq alldone
|
|
dec numhist
|
|
lda [ptr2]
|
|
sta ptr
|
|
lda [ptr2],y
|
|
sta ptr+2
|
|
pei (ptr2+2)
|
|
pei (ptr2)
|
|
jsl nullfree
|
|
lda ptr
|
|
sta ptr2
|
|
lda ptr+2
|
|
sta ptr2+2
|
|
ldy #histNext+2
|
|
bra dispose
|
|
|
|
alldone return
|
|
|
|
RVParm dc a4'historyStr'
|
|
dc a4'buffer'
|
|
|
|
size ds 2
|
|
|
|
END
|
|
|
|
;=========================================================================
|
|
;
|
|
; Places the previous history into the command buffer, called when pressing
|
|
; UP-ARROW.
|
|
;
|
|
;=========================================================================
|
|
|
|
PrevHistory START
|
|
|
|
using HistoryData
|
|
using global
|
|
using termdata
|
|
|
|
ora2 historyptr,historyptr+2,@a ;If no history, then skip
|
|
jeq ctl5a
|
|
|
|
ldx cmdloc ;Move cursor to beginning of line
|
|
jsr moveleft
|
|
|
|
lda cdcap
|
|
ora cdcap
|
|
beq ctl5b0
|
|
tputs (cdcap,#0,#outc)
|
|
bra ctl5g
|
|
|
|
ctl5b0 ldx cmdlen ;clear line
|
|
ctl5b dex
|
|
bmi ctl5c
|
|
phx
|
|
lda #' '
|
|
jsr putchar
|
|
plx
|
|
bra ctl5b
|
|
ctl5c ldx cmdlen
|
|
jsr moveleft
|
|
|
|
ctl5g ora2 currenthist,currenthist+2,@a
|
|
bne ctl5i ;If not set up for current hist then
|
|
lda historyptr+2 ;Set up at start.
|
|
ldx historyptr
|
|
ldy #2
|
|
bra ctl5j
|
|
|
|
ctl5i mv4 currenthist,0 ;Otherwise move to previous history
|
|
stz cmdlen
|
|
stz cmdloc
|
|
ldy #HistNext+2
|
|
lda [0]
|
|
tax
|
|
lda [0],y
|
|
|
|
ctl5j sta 0+2 ;Save some pointers
|
|
stx 0
|
|
sta currenthist+2
|
|
stx currenthist
|
|
ora 0 ;If ptr is 0 then at end, quit
|
|
beq ctl5a
|
|
|
|
ldx #0 ;Display and store command
|
|
iny2
|
|
ctl5h lda [0],y
|
|
and #$FF
|
|
sta cmdline,x
|
|
beq ctl5ha
|
|
inx
|
|
iny
|
|
bra ctl5h
|
|
ctl5ha stx cmdlen
|
|
stx cmdloc
|
|
|
|
ldx #^cmdline
|
|
lda #cmdline
|
|
jsr puts
|
|
|
|
ctl5a rts
|
|
|
|
END
|
|
|
|
;=========================================================================
|
|
;
|
|
; Places the next history into the command buffer, called when pressing
|
|
; DOWN-ARROW.
|
|
;
|
|
;=========================================================================
|
|
|
|
NextHistory START
|
|
|
|
using HistoryData
|
|
using global
|
|
using termdata
|
|
|
|
ora2 historyptr,historyptr+2,@a ;No hist, then skip
|
|
jeq ctl6a
|
|
|
|
stz 4 ;Walk through linked list searching
|
|
stz 4+2 ; for hist prior to last hist.
|
|
mv4 historyptr,0
|
|
ctl6i if2 0,ne,currenthist,ctl6j
|
|
if2 0+2,eq,currenthist+2,ctl6k
|
|
ctl6j mv4 0,4
|
|
ldy #HistNext+2
|
|
lda [0]
|
|
tax
|
|
lda [0],y
|
|
sta 0+2
|
|
stx 0
|
|
bra ctl6i
|
|
|
|
ctl6k ldx cmdloc ;Move cursor to left
|
|
jsr moveleft
|
|
|
|
lda cdcap
|
|
ora cdcap
|
|
beq ctl6b0
|
|
tputs (cdcap,#0,#outc)
|
|
bra ctl6g
|
|
|
|
ctl6b0 ldx cmdlen ;clear line
|
|
ctl6b dex
|
|
bmi ctl6c
|
|
phx
|
|
lda #' '
|
|
jsr putchar
|
|
plx
|
|
bra ctl6b
|
|
ctl6c ldx cmdlen
|
|
jsr moveleft
|
|
|
|
ctl6g stz cmdlen ;Get hist info.
|
|
stz cmdloc
|
|
mv4 4,currenthist
|
|
ora2 4,4+2,@a
|
|
beq ctl6a ;Whoops, back to end, quit
|
|
|
|
ldx #0 ;Output the new command
|
|
ldy #4
|
|
ctl6h lda [4],y
|
|
and #$ff
|
|
sta cmdline,x
|
|
beq ctl6ha
|
|
iny
|
|
inx
|
|
bra ctl6h
|
|
ctl6ha stx cmdlen
|
|
stx cmdloc
|
|
|
|
ldx #^cmdline
|
|
lda #cmdline
|
|
jsr puts
|
|
|
|
ctl6a rts
|
|
|
|
END
|
|
|
|
;=========================================================================
|
|
;
|
|
; Save History if variable set
|
|
;
|
|
;=========================================================================
|
|
|
|
SaveHistory START
|
|
|
|
using HistoryData
|
|
using global
|
|
|
|
lda historyFN
|
|
sta DestroyParm+2
|
|
sta CreateParm+2
|
|
sta OpenParm+4
|
|
lda historyFN+2
|
|
sta DestroyParm+4
|
|
sta CreateParm+4
|
|
sta OpenParm+6
|
|
|
|
Read_Variable RVParm
|
|
lda buffer
|
|
and #$FF
|
|
jeq done
|
|
Dec2Int (#buffer+1,@a,#0),size
|
|
lda size
|
|
jeq done
|
|
;
|
|
; Create and write history to file
|
|
;
|
|
Destroy DestroyParm
|
|
Create CreateParm
|
|
jcs done
|
|
Open OpenParm
|
|
bcs done
|
|
mv2 OpenRef,(WriteRef,WriteCRRef,CloseRef)
|
|
|
|
loop1 mv4 historyptr,0
|
|
mv2 size,count
|
|
ldy #histNext+2
|
|
loop2 lda 0
|
|
ora 0+2
|
|
beq next
|
|
lda [0]
|
|
tax
|
|
dec count
|
|
beq write
|
|
lda [0],y
|
|
sta 0+2
|
|
stx 0
|
|
bra loop2
|
|
write clc
|
|
lda 0
|
|
adc #4
|
|
tax
|
|
sta WriteBuf
|
|
lda 0+2
|
|
adc #0
|
|
sta WriteBuf+2
|
|
pha
|
|
phx
|
|
jsr cstrlen
|
|
sta WriteReq
|
|
Write WriteParm
|
|
bcs doneclose
|
|
Write WriteCR
|
|
bcs doneclose
|
|
next dec size
|
|
bne loop1
|
|
|
|
doneclose Close CloseParm
|
|
|
|
done rts
|
|
|
|
RVParm dc a4'savehistStr'
|
|
dc a4'buffer'
|
|
|
|
DestroyParm dc i2'1'
|
|
dc a4'historyFN'
|
|
|
|
CreateParm dc i2'3'
|
|
dc a4'historyFN'
|
|
dc i2'$C3'
|
|
dc i2'0'
|
|
|
|
OpenParm dc i2'2'
|
|
OpenRef ds 2
|
|
dc a4'historyFN'
|
|
|
|
WriteParm dc i2'4'
|
|
WriteRef ds 2
|
|
WriteBuf dc a4'buffer'
|
|
WriteReq ds 4
|
|
ds 4
|
|
|
|
WriteCR dc i2'4'
|
|
WriteCRRef ds 2
|
|
dc a4'CRBuf'
|
|
dc i4'1'
|
|
ds 4
|
|
CRBuf dc i1'13'
|
|
|
|
CloseParm dc i2'1'
|
|
CloseRef ds 2
|
|
|
|
size ds 2
|
|
count ds 2
|
|
|
|
END
|
|
|
|
;=========================================================================
|
|
;
|
|
; Read History file
|
|
;
|
|
;=========================================================================
|
|
|
|
ReadHistory START
|
|
|
|
using HistoryData
|
|
using global
|
|
|
|
lda historyFN
|
|
sta OpenParm+4
|
|
lda historyFN+2
|
|
sta OpenParm+6
|
|
|
|
lda #0
|
|
sta historyptr
|
|
sta historyptr+2
|
|
|
|
Open OpenParm
|
|
bcs done
|
|
mv2 OpenRef,(ReadRef,NLRef,CloseRef)
|
|
NewLine NLParm
|
|
bcs doneclose
|
|
|
|
loop anop
|
|
Read ReadParm
|
|
bcs doneclose
|
|
ldy ReadTrans
|
|
beq doneclose
|
|
dey
|
|
lda #0
|
|
sta buffer,y
|
|
ph4 #buffer
|
|
jsl InsertHistory
|
|
bra loop
|
|
|
|
doneclose Close CloseParm
|
|
|
|
done rts
|
|
|
|
OpenParm dc i2'2'
|
|
OpenRef ds 2
|
|
dc a4'historyFN'
|
|
|
|
NLParm dc i2'4'
|
|
NLRef ds 2
|
|
dc i2'$7F'
|
|
dc i2'1'
|
|
dc a4'NLTable'
|
|
NLTable dc i1'13'
|
|
|
|
ReadParm dc i2'4'
|
|
ReadRef ds 2
|
|
dc a4'buffer'
|
|
dc i4'1024'
|
|
ReadTrans ds 4
|
|
|
|
CloseParm dc i2'1'
|
|
CloseRef ds 2
|
|
|
|
size ds 2
|
|
|
|
END
|
|
|
|
;=========================================================================
|
|
;
|
|
; Init History
|
|
;
|
|
;=========================================================================
|
|
InitHistory START
|
|
using HistoryData
|
|
|
|
ph4 #histName
|
|
jsl AppendHome
|
|
stx historyFN+2
|
|
sta historyFN
|
|
rts
|
|
END
|
|
|
|
;=========================================================================
|
|
;
|
|
; Print History
|
|
;
|
|
;=========================================================================
|
|
|
|
PrintHistory START
|
|
|
|
using HistoryData
|
|
using global
|
|
|
|
ptr equ 0
|
|
space equ ptr+4
|
|
|
|
subroutine (2:argc,4:argv),space
|
|
|
|
lda historyptr
|
|
ora historyptr+2
|
|
beq done
|
|
|
|
lda numhist
|
|
sta num
|
|
loop1 mv4 historyptr,ptr
|
|
lda num
|
|
bmi done
|
|
sta count
|
|
loop2 lda count
|
|
beq print
|
|
ldy #histNext+2
|
|
lda [ptr]
|
|
tax
|
|
lda [ptr],y
|
|
sta ptr+2
|
|
stx ptr
|
|
ora ptr
|
|
beq next
|
|
dec count
|
|
bra loop2
|
|
|
|
print sub2 lasthist,num,@a
|
|
Int2Dec (@a,#numbstr,#4,#0)
|
|
ldx #^numbstr
|
|
lda #numbstr
|
|
jsr puts
|
|
clc
|
|
ldx ptr+2
|
|
lda ptr
|
|
adc #4
|
|
ok jsr puts
|
|
jsr newline
|
|
|
|
next dec num
|
|
bra loop1
|
|
|
|
done return
|
|
|
|
numbstr dc c'0000: ',h'00'
|
|
num ds 2
|
|
count ds 2
|
|
|
|
END
|
|
|
|
;=========================================================================
|
|
;
|
|
; History Data
|
|
;
|
|
;=========================================================================
|
|
|
|
HistoryData DATA
|
|
|
|
lasthist dc i2'0'
|
|
numhist dc i2'0'
|
|
currenthist ds 4
|
|
historyptr dc i4'0'
|
|
historyStr str 'HISTORY'
|
|
savehistStr str 'SAVEHIST'
|
|
histName dc c'/history',i1'0'
|
|
historyFN ds 4
|
|
|
|
END
|