mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-12-22 14:30:29 +00:00
575 lines
12 KiB
NASM
575 lines
12 KiB
NASM
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**************************************************************************
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*
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* The GNO Shell Project
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*
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* Developed by:
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* Jawaid Bazyar
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* Tim Meekins
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*
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**************************************************************************
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*
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* HISTORY.ASM
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* By Tim Meekins
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*
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* Routines for dealing with history buffers.
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*
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* History Data Structures:
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*
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* HistoryPtr -> historyRec [HistoryPtr is the most recent history]
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*
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* Where historyRec is:
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*
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* [+0] NextHistory: pointer to historyRec
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* [+4] HistoryCmd: string of characters
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*
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**************************************************************************
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keep o/history
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mcopy m/history.mac
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histNext gequ 0
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histCmd gequ 4
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;=========================================================================
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;
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; Add a C string to the head of the history buffer.
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;
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;=========================================================================
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InsertHistory START
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using HistoryData
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using global
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ptr2 equ 0
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ptr equ ptr2+4
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len equ ptr+4
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space equ len+2
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subroutine (4:cmd),space
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pei (cmd+2)
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pei (cmd)
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jsr cstrlen
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sta len
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pea 0
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clc
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adc #4+1
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pha
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jsl ~NEW
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sta ptr
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stx ptr+2
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ora ptr+2
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beq putdone
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inc lasthist
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inc numhist
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lda historyptr ;Set up linked list pointers
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sta [ptr]
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ldy #histNext+2
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lda historyptr+2
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sta [ptr],y
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mv4 ptr,historyptr
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pei (cmd+2)
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pei (cmd)
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pei (ptr+2)
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clc
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lda ptr
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adc #4
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pha
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jsr copycstr
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;
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; Now, find out what the maximum history is and prune to that value
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;
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putdone anop
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Read_Variable RVParm
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lda buffer
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and #$FF
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beq alldone
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Dec2Int (#buffer+1,@a,#0),@a
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sta size
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beq alldone
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;
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; Follow linked list until we reach size histories
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;
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mv4 historyptr,ptr
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ldy #histNext+2
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follow lda [ptr]
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tax
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ora [ptr],y
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beq alldone ;not enough
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dec size
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beq prune
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lda [ptr],y
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sta ptr+2
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stx ptr
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bra follow
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;
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; we have enough, start pruning
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;
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prune lda [ptr]
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sta ptr2
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lda [ptr],y
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sta ptr2+2
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lda #0
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sta [ptr]
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sta [ptr],y ;terminate last history
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;
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; Dispose remaining
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;
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dispose lda ptr2
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ora ptr2+2
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beq alldone
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dec numhist
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lda [ptr2]
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sta ptr
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lda [ptr2],y
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sta ptr+2
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pei (ptr2+2)
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pei (ptr2)
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jsl nullfree
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lda ptr
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sta ptr2
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lda ptr+2
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sta ptr2+2
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ldy #histNext+2
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bra dispose
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alldone return
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RVParm dc a4'historyStr'
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dc a4'buffer'
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size ds 2
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END
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;=========================================================================
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;
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; Places the previous history into the command buffer, called when pressing
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; UP-ARROW.
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;
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;=========================================================================
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PrevHistory START
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using HistoryData
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using global
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using termdata
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ora2 historyptr,historyptr+2,@a ;If no history, then skip
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jeq ctl5a
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ldx cmdloc ;Move cursor to beginning of line
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jsr moveleft
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lda cdcap
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ora cdcap
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beq ctl5b0
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tputs (cdcap,#0,#outc)
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bra ctl5g
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ctl5b0 ldx cmdlen ;clear line
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ctl5b dex
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bmi ctl5c
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phx
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lda #' '
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jsr putchar
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plx
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bra ctl5b
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ctl5c ldx cmdlen
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jsr moveleft
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ctl5g ora2 currenthist,currenthist+2,@a
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bne ctl5i ;If not set up for current hist then
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lda historyptr+2 ;Set up at start.
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ldx historyptr
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ldy #2
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bra ctl5j
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ctl5i mv4 currenthist,0 ;Otherwise move to previous history
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stz cmdlen
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stz cmdloc
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ldy #HistNext+2
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lda [0]
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tax
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lda [0],y
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ctl5j sta 0+2 ;Save some pointers
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stx 0
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sta currenthist+2
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stx currenthist
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ora 0 ;If ptr is 0 then at end, quit
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beq ctl5a
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ldx #0 ;Display and store command
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iny2
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ctl5h lda [0],y
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and #$FF
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sta cmdline,x
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beq ctl5ha
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inx
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iny
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bra ctl5h
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ctl5ha stx cmdlen
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stx cmdloc
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ldx #^cmdline
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lda #cmdline
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jsr puts
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ctl5a rts
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END
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;=========================================================================
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;
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; Places the next history into the command buffer, called when pressing
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; DOWN-ARROW.
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;
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;=========================================================================
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NextHistory START
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using HistoryData
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using global
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using termdata
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ora2 historyptr,historyptr+2,@a ;No hist, then skip
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jeq ctl6a
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stz 4 ;Walk through linked list searching
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stz 4+2 ; for hist prior to last hist.
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mv4 historyptr,0
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ctl6i if2 0,ne,currenthist,ctl6j
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if2 0+2,eq,currenthist+2,ctl6k
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ctl6j mv4 0,4
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ldy #HistNext+2
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lda [0]
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tax
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lda [0],y
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sta 0+2
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stx 0
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bra ctl6i
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ctl6k ldx cmdloc ;Move cursor to left
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jsr moveleft
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lda cdcap
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ora cdcap
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beq ctl6b0
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tputs (cdcap,#0,#outc)
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bra ctl6g
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ctl6b0 ldx cmdlen ;clear line
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ctl6b dex
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bmi ctl6c
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phx
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lda #' '
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jsr putchar
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plx
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bra ctl6b
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ctl6c ldx cmdlen
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jsr moveleft
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ctl6g stz cmdlen ;Get hist info.
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stz cmdloc
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mv4 4,currenthist
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ora2 4,4+2,@a
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beq ctl6a ;Whoops, back to end, quit
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ldx #0 ;Output the new command
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ldy #4
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ctl6h lda [4],y
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and #$ff
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sta cmdline,x
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beq ctl6ha
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iny
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inx
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bra ctl6h
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ctl6ha stx cmdlen
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stx cmdloc
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ldx #^cmdline
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lda #cmdline
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jsr puts
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ctl6a rts
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END
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;=========================================================================
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;
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; Save History if variable set
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;
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;=========================================================================
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SaveHistory START
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using HistoryData
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using global
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lda historyFN
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sta DestroyParm+2
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sta CreateParm+2
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sta OpenParm+4
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lda historyFN+2
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sta DestroyParm+4
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sta CreateParm+4
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sta OpenParm+6
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Read_Variable RVParm
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lda buffer
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and #$FF
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jeq done
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Dec2Int (#buffer+1,@a,#0),size
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lda size
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jeq done
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;
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; Create and write history to file
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;
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Destroy DestroyParm
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Create CreateParm
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jcs done
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Open OpenParm
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bcs done
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mv2 OpenRef,(WriteRef,WriteCRRef,CloseRef)
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loop1 mv4 historyptr,0
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mv2 size,count
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ldy #histNext+2
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loop2 lda 0
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ora 0+2
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beq next
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lda [0]
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tax
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dec count
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beq write
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lda [0],y
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sta 0+2
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stx 0
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bra loop2
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write clc
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lda 0
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adc #4
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tax
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sta WriteBuf
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lda 0+2
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adc #0
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sta WriteBuf+2
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pha
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phx
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jsr cstrlen
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sta WriteReq
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Write WriteParm
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bcs doneclose
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Write WriteCR
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bcs doneclose
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next dec size
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bne loop1
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doneclose Close CloseParm
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done rts
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RVParm dc a4'savehistStr'
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dc a4'buffer'
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DestroyParm dc i2'1'
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dc a4'historyFN'
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CreateParm dc i2'3'
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dc a4'historyFN'
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dc i2'$C3'
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dc i2'0'
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OpenParm dc i2'2'
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OpenRef ds 2
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dc a4'historyFN'
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WriteParm dc i2'4'
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WriteRef ds 2
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WriteBuf dc a4'buffer'
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WriteReq ds 4
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ds 4
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WriteCR dc i2'4'
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WriteCRRef ds 2
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dc a4'CRBuf'
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dc i4'1'
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ds 4
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CRBuf dc i1'13'
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CloseParm dc i2'1'
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CloseRef ds 2
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size ds 2
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count ds 2
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END
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;=========================================================================
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;
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; Read History file
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;
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;=========================================================================
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|
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ReadHistory START
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using HistoryData
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using global
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lda historyFN
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sta OpenParm+4
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lda historyFN+2
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sta OpenParm+6
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lda #0
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sta historyptr
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sta historyptr+2
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Open OpenParm
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bcs done
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mv2 OpenRef,(ReadRef,NLRef,CloseRef)
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NewLine NLParm
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bcs doneclose
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loop anop
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Read ReadParm
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bcs doneclose
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ldy ReadTrans
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beq doneclose
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dey
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lda #0
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sta buffer,y
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ph4 #buffer
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jsl InsertHistory
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bra loop
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|
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
|