nxu/femto.tal

569 lines
16 KiB
Tal

( femto.tal )
( )
( requires terminal to be in raw mode )
( see femto launcher script for more details )
( )
( ANSI sequences )
( )
( goto $row,$col ESC [ $row ; $col H )
( goto home ESC [ H )
( go up ESC [ A )
( go down ESC [ B )
( go right ESC [ C )
( go left ESC [ D )
( )
( query cursor ESC [ 6 n )
( )
( all scroll on ESC [ r )
( region scroll on ESC [ $y0 ; $y1 r )
( scroll down ESC D )
( scroll up ESC M )
( )
( erase cur->eol ESC [ K )
( erase cur->sol ESC [ 1 K )
( erase line ESC [ 2 K )
( erase line->bot ESC [ J )
( erase line->top ESC [ 1 J )
( erase all ESC [ 2 J )
( )
( set attrs ESC [ $at1 ; ... m )
( reset ESC [ m )
( 0 reset, 1 bright, 2 dim, )
( 4 underscore, 5 blink, )
( 7 reverse, 8 hidden )
( )
( fg (30-37), bg (40-47) )
( black, red, green, yellow, )
( blue, magenta, cyan, white )
( TODO: )
( - set up term scrolling at start )
( - optimize term drawing )
( - get long line truncation/scrolling working )
( - unify insertion/overwrite code )
( - display cursor coords )
( - page up/page down )
( - jump to end of buffer )
( - line numbers in left column (toggle mode?) )
( - help text )
( - save file command -> tmp first )
( - open file command? )
( - close file command? )
( - move by word/paragraph )
( - search )
( - search&replace )
( - tab support? )
( - windows line-ending support (CRLF) )
|00 @System [ &vector $2 &wst $1 &rst $1 &pad $4 &r $2 &g $2 &b $2 &debug $1 &halt $1 ]
|10 @Console [ &vector $2 &read $1 &pad $5 &write $1 &error $1 ]
|a0 @File [ &vector $2 &success $2 &stat $2 &delete $1 &append $1 &name $2 &length $2 &read $2 &write $2 ]
%dbg { #ff .System/debug DEO }
%emit { .Console/write DEO }
%sp { #2018 DEO }
%nl { #0a18 DEO }
%cr { #0d18 DEO }
%exit { #01 .System/halt DEO BRK }
%ansi { #1b18 DEO #5b18 DEO }
%height { ;term/rows LDA2 NIP }
%last-line { ;term/rows LDA2 #0001 SUB2 NIP }
%pen-line { ;term/rows LDA2 #0002 SUB2 NIP }
%pen-col { ;term/cols LDA2 #0002 SUB2 NIP }
|0100
;read-filename .Console/vector DEO2
( use this if hardcoding to 80x24 )
( ;setup-80x24 JSR2 )
( use this to detect terminal size )
( ;setup-terminal-size JSR2 )
BRK
@open-file ( filename* -> )
.File/name DEO2
#8000 .File/length DEO2
;buffer/data .File/read DEO2
.File/success DEI2 #0000 GTH2 ,&ok JCN
;messages/input-error ;print JSR2 nl exit
( calculate buffer limit address using start + size )
&ok .File/success DEI2 ;buffer/data ADD2 ;buffer/limit STA2
JMP2r
@setup-terminal-size
( ;setup-80x24 JSR2 )
#fe #fe ;term-move-cursor JSR2
;term-get-cursor-position JSR2
;tmp/data ;tmp/pos STA2
;receive-terminal-size .Console/vector DEO2
JMP2r
@receive-terminal-size
.Console/read DEI ;tmp/pos LDA2 STA
;tmp/pos LDA2 INC2 ;tmp/pos STA2
.Console/read DEI LIT 'R EQU ;parse-terminal-size JCN2
BRK
@parse-terminal-size ( -> )
LIT2r 0000 LIT2r 0000
;tmp/data LDAk #1b NEQ ,&parse-error JCN ( i ) INC2
LDAk LIT '[ NEQ ,&parse-error JCN ( i ) INC2
&loop
LDAk LIT '; EQU ,&parse-col JCN
LIT2r 000a MUL2r
LDAk LIT '0 SUB #00 SWP STH2 ADD2r
INC2 ,&loop JMP
&parse-col
( INC2 STH2r ;term/rows STA2 )
INC2 STH2r #0002 SUB2 ;term/rows STA2
&loop2
LDAk LIT 'R EQU ,&done JCN
LIT2r 000a MUL2r
LDAk LIT '0 SUB #00 SWP STH2 ADD2r
INC2 ,&loop2 JMP
&done
STH2r ;term/cols STA2 POP2
;on-key .Console/vector DEO2
;draw-all JSR2
BRK
&parse-error LDAk #00 #00 DIV
@setup-linecount ( -> )
;buffer/data LIT2r 0001
&loop DUP2 ;buffer/limit LDA2 EQU2 ,&done JCN
LDAk #00 EQU ,&done JCN
LDAk #0a NEQ JMP INC2r
INC2 ,&loop JMP
&done POP2
STH2r ;buffer/line-count STA2
JMP2r
@setup-80x24 ( -> )
#0050 ;term/cols STA2
#0014 ;term/rows STA2
;on-key .Console/vector DEO2
;draw-all JSR2
JMP2r
@read-filename ( -> )
#12 DEI #0a EQU ,&execute JCN ( did we read \n ? )
#12 DEI ;tmp/pos LDA2 STA ( no, so save in buffer )
;tmp/pos LDA2 INC2 ;tmp/pos STA2 ( pos++ )
BRK ( return )
&execute ( we saw a newline, so do something )
#00 ;tmp/pos LDA2 STA ( null terminate str )
;tmp/data ;tmp/pos STA2 ( reset pos )
( ;tmp/data ;open-file JSR2 ( open file ) )
;tmp/data ;filename ;str-copy JSR2 ( )
;filename ;open-file JSR2 ( open file )
;setup-linecount JSR2 ( determine # of lines )
;setup-terminal-size JSR2 ( detect terminal dimensions )
BRK
@bol
#00 ;cursor/col STA
;draw-cursor JSR2 BRK
( FIXME: handle long lines )
@eol
;cur-line JSR2 ;line-len JSR2 NIP ;cursor/col STA
;draw-cursor JSR2 BRK
( FIXME: handle long lines )
@forward
;cursor/col LDA pen-col GTH ,&skip JCN
;cursor/col LDA #01 ADD ;cursor/col STA
;draw-cursor JSR2
&skip BRK
( FIXME: handle long lines )
@back
;cursor/col LDA #01 LTH ,&skip JCN
;cursor/col LDA #01 SUB ;cursor/col STA
;draw-cursor JSR2
&skip BRK
@up
;cursor/row LDA #01 LTH ,&screen-up JCN
;cursor/row LDA #01 SUB ;cursor/row STA
;draw-cursor JSR2 BRK
&screen-up
;buffer/offset LDA2 DUP2 ;buffer/data EQU2 ,&done JCN
#0001 SUB2
&loop DUP2 ;buffer/data EQU2 ,&complete JCN
#0001 SUB2 LDAk #0a NEQ ,&loop JCN
INC2
&complete ;buffer/offset STA2 ;draw-all JSR2 BRK
&done POP2 BRK
( FIXME: need to handle 'end of buffer' stuff )
@down
;cursor/row LDA pen-line GTH ,&screen-down JCN
;cursor/row LDA #01 ADD ;cursor/row STA
;draw-cursor JSR2 BRK
&screen-down
#00 ;rel-line JSR2 ;line-len JSR2 INC2 ( add 1 for line ending )
;buffer/offset LDA2 ADD2
;buffer/offset STA2
;draw-all JSR2
BRK
@quit exit
@ignore BRK
@die #00 #00 DIV
@insert ( c^ -> )
;cursor/col LDA pen-col GTH ,&skip JCN ( FIXME )
;cur-pos JSR2 ;shift-right JSR2
;cursor/col LDA INC ;cursor/col STA
;draw-all JSR2
&skip BRK
@overwrite ( c^ -> )
;cursor/col LDA pen-col GTH ,&skip JCN ( FIXME )
;cur-pos JSR2 STA
;cursor/col LDA #01 ADD ;cursor/col STA
;draw-all JSR2
&skip BRK
@newline ( c^ -> )
#0a ;cur-pos JSR2 ;shift-right JSR2
#00 ;cursor/col STA
;cursor/row LDA INC ;cursor/row STA
;buffer/line-count LDA2k INC2 SWP2 STA2
;draw-all JSR2
BRK
@backspace ( -> )
;cur-pos JSR2 ;buffer/data EQU2 ,&skip JCN
;cursor/col LDA #00 EQU ,&prev-line JCN
;cursor/col LDA #01 SUB ;cursor/col STA
,&finish JMP
&prev-line
;cursor/row LDA #01 SUB ;cursor/row STA
;cur-len JSR2 NIP ;cursor/col STA
;buffer/line-count LDA2k #0001 SUB2 SWP2 STA2
&finish
;cur-pos JSR2 ;shift-left JSR2
;draw-all JSR2
&skip BRK
( there's at least one bug -- join lots of lines near start )
@delete ( -> )
;last-pos JSR2 #0001 SUB2
;cur-pos JSR2 LTH2k ,&skip JCN
;cur-pos JSR2 LDAk STH
;shift-left JSR2
STHr #0a NEQ ,&not-newline JCN
;buffer/line-count LDA2k #0001 SUB2 SWP2 STA2
&not-newline ;draw-all JSR2
&skip BRK
@escape ( -> )
#01 ;saw-esc STA BRK
@goto-end ( FIXME )
@goto-start ( -> )
;buffer/data ;buffer/offset STA2
#00 ;cursor/col STA
#00 ;cursor/row STA
;draw-all JSR2
BRK
@goto-line ( -> )
#0060 ;jump-to-line JSR2
;draw-all JSR2 BRK
@jump-to-line ( n* -> )
;term/rows LDA2 #0002 DIV2 LTH2k ( n rows/2 n<rows/2? ) ,&early JCN
OVR2 SWP2 SUB2 ( n n-rows/2 )
;buffer/line-count LDA2 ( n n-rows/2 lines )
;term/rows LDA2 SUB2 ( n n-rows/2 lines-rows )
GTH2k ( n n-rows/2 lines-rows n-rows/2>lines-rows? )
,&late JCN ( n n-rows/2 lines-rows )
POP2 ,&finish JMP
&early ( n rows/2 )
POP2 ,&finish JCN
&late ( n n-rows/2 lines-rows )
NIP2 ,&finish JCN
&finish ( n o )
SUB2k STH2
;abs-line JSR2 ;buffer/offset STA2
#00 ;cursor/col STA
POP2 STH2r NIP ;cursor/row STA
JMP2r
( TODO: M-v for page up and M-> for goto end )
( M-f and M-b for next/previous word )
( M-n and M-p for next/previous paragraph )
( maybe M-% for search&replace )
@on-key-escaped
#00 ;saw-esc STA
.Console/read DEI LIT '< EQU ( M-< ) ;goto-start JCN2
.Console/read DEI LIT '> EQU ( M-> ) ;goto-end JCN2
.Console/read DEI LIT 'g EQU ( M-g ) ;goto-line JCN2
BRK
( TODO: C-g or C-h for help )
( TODO: C-s for search )
( TODO: C-v for page down )
( TODO: 8-bit meta/alt? )
( TODO: tab input? )
@on-key
;saw-esc LDA ;on-key-escaped JCN2
.Console/read DEI #01 EQU ( C-a ) ;bol JCN2
.Console/read DEI #02 EQU ( C-b ) ;back JCN2
.Console/read DEI #04 EQU ( C-d ) ;delete JCN2
.Console/read DEI #05 EQU ( C-e ) ;eol JCN2
.Console/read DEI #06 EQU ( C-f ) ;forward JCN2
.Console/read DEI #0d EQU ( \r ) ;newline JCN2
.Console/read DEI #0e EQU ( C-n ) ;down JCN2
.Console/read DEI #10 EQU ( C-p ) ;up JCN2
.Console/read DEI #18 EQU ( C-x ) ;quit JCN2
.Console/read DEI #1b EQU ( ESC ) ;escape JCN2
.Console/read DEI #7f EQU ( DEL ) ;backspace JCN2
.Console/read DEI #20 LTH ;ignore JCN2 ( ignore for now )
.Console/read DEI #7e GTH ;ignore JCN2 ( ignore for now )
.Console/read DEI ( printable ASCII ) ;insert JMP2
BRK
@min ( x^ y^ -> min^ )
LTHk JMP SWP POP JMP2r
@term-move-cursor ( col^ row^ -> )
ansi INC ( row+1 ) ;emit-dec JSR2
LIT '; emit INC ( col+1 ) ;emit-dec JSR2
LIT 'H emit JMP2r
@term-get-cursor-position
ansi LIT '6 emit LIT 'n emit JMP2r
@term-erase-all
ansi LIT '2 emit LIT 'J emit JMP2r
@draw-cursor
;get-col JSR2 ;get-row JSR2
;term-move-cursor JSR2 JMP2r
@draw-statusbar
#00 height ;term-move-cursor JSR2
ansi LIT '7 emit LIT 'm emit
LIT2r 2018
;term/cols LDA2 #0000
&loop GTH2k ,&continue JCN ,&done JMP
&continue DEOkr INC2 ,&loop JMP
&done POP2 POP2 POP2r
#00 height ;term-move-cursor JSR2
;messages/saved ;print JSR2
;filename ;print JSR2
#20 emit
;buffer/limit LDA2 ;buffer/data SUB2 ;emit-dec2 JSR2
;messages/bytes ;print JSR2
#20 emit
;buffer/line-count LDA2 ;emit-dec2 JSR2
;messages/lines ;print JSR2
ansi LIT '0 emit LIT 'm emit
JMP2r
( @draw-line ( s* -> )
&loop LDAk #00 EQU ,&done JCN
LDAk #0a EQU ,&done JCN
LDAk emit INC2 ,&loop JMP
&done POP2 JMP2r )
@draw-all
;term-erase-all JSR2
;draw-statusbar JSR2
#00 #00 ;term-move-cursor JSR2
#00 STH
;buffer/offset LDA2
&loop
LDAk #00 EQU ,&eof JCN
LDAk #0a EQU ,&eol JCN
LDAk emit INC2 ,&loop JMP
&eol INCr STHkr last-line ( #17 ) GTH ,&eof JCN
cr nl INC2 ,&loop JMP
&eof POP2 POPr
;draw-cursor JSR2
JMP2r
@str-copy ( src* dst* -> )
STH2 ( src [dst] )
&loop LDAk #00 EQU ,&done JCN
LDAk STH2kr STA
INC2 INC2r ,&loop JMP
&done POP2 #00 STH2r STA
JMP2r
@print ( s* -> )
&loop LDAk #00 EQU ,&eof JCN
LDAk #18 DEO INC2 ,&loop JMP
&eof POP2 JMP2r
@cur-len ( -> n* )
;cur-line JSR2 ;line-len JSR2 JMP2r
@line-len ( s* -> n* )
#0000 STH2
&loop LDAk #00 EQU ,&end JCN
LDAk #0a EQU ,&end JCN
INC2 INC2r ,&loop JMP
&end POP2 STH2r JMP2r
@abs-line ( y* -> s* )
#0000 SWP2 SUB2 STH2 ( [-y] )
;buffer/data LDA2 ( addr )
&newline ( addr [-y] )
STH2kr ORA ,&loop JCN ,&done JMP
&loop ( addr [-y] )
LDAk #00 EQU ,&not-found JCN ( addr [-y] )
LDAk #0a EQU ,&found JCN ( addr [-y] )
INC2 ,&loop JMP ( addr+1 [-y] )
&found INC2 INC2r ( addr+1 [-y+1] ) ,&newline JMP
&done POP2r JMP2r
&not-found POP2 POP2r #0000 JMP2r
( line number relative to the offset, starting at 0 )
@rel-line ( y^ -> s* )
#00 SWP SUB STH ( [-y] )
;buffer/offset LDA2 ( addr* )
&newline ( addr [-y] )
STHkr ,&loop JCN ,&done JMP
&loop ( addr [-y] )
LDAk #00 EQU ,&not-found JCN ( addr [-y] )
LDAk #0a EQU ,&found JCN ( addr [-y] )
INC2 ,&loop JMP ( addr+1 [-y] )
&found INC2 INCr ( addr+1 [-y+1] ) ,&newline JMP
&done POPr JMP2r
&not-found #00 #00 DIV
@cur-line ( -> s* )
;cursor/row LDA ;rel-line JSR2 JMP2r
@cur-pos ( -> s* )
;cur-line JSR2 #00 ;get-col JSR2 ADD2 JMP2r
@shift-right ( c^ addr* -> )
ROT STH ( addr [prev^] )
;buffer/limit LDA2 ( addr limit [prev^] )
#0001 SUB2 SWP2 ( last addr [prev^] )
&loop LTH2k ,&done JCN ( last addr [prev^] )
LDAk STH SWPr ( last addr [prev^ curr^] )
DUP2 STHr ( last addr addr prev^ [curr^] )
ROT ROT STA ( last addr [curr^] )
INC2 ,&loop JMP ( last addr+1 [curr^] )
&done NIP2 DUP2 ( addr addr [prev^] )
STHr ROT ROT ( addr prev^ addr )
STA INC2 ( addr+1 )
;buffer/limit STA2 ( )
JMP2r
@shift-left ( addr* -> )
;buffer/limit LDA2 ( addr limit )
#0001 SUB2 SWP2 ( last addr )
&loop GTH2k ,&next JCN ( last addr )
,&done JMP ( last addr )
&next DUP2 INC2 LDAk ( last addr addr+1 c1^ )
STH SWP2 STHr ( last addr+1 addr c1^ )
ROT ROT ( last addr+1 c1^ addr )
STA ,&loop JMP ( last addr+1 )
&done POP2 ( last )
;buffer/limit STA2 ( )
JMP2r
@get-col
;cursor/col LDA ;cur-len JSR2 NIP ;min JSR2 JMP2r
@get-row
;cursor/row LDA JMP2r
@last-pos
;buffer/limit LDA2 #0001 SUB2 JMP2r
@doc-start ( -> s* ) ;buffer/data JMP2r
@doc-limit ( -> s* ) ;buffer/limit LDA2 JMP2r
@doc-last ( -> s* ) ;buffer/limit LDA2 #0001 SUB2 JMP2r
@page-start ( -> s* ) ;buffer/offset LDA2 JMP2r
@page-limit ( -> s* ) height ;rel-line JSR2 JMP2r
@page-last ( -> s* ) height ;rel-line JSR2 #0001 SUB2 JMP2r
@line-start ( -> s* ) ;cursor/row LDA ;rel-line JSR2 JMP2r
@line-limit ( -> s* ) ;cursor/row LDA INC ;rel-line JSR2 JMP2r
@line-last ( -> s* ) ;cursor/row LDA INC ;rel-line JSR2 #0001 SUB2 JMP2r
@mod-div ( x^ y^ -> x%d x/y )
DIVk STHk MUL SUB STHr JMP2r
@mod-div2 ( x^ y^ -> x%d x/y )
DIV2k STH2k MUL2 SUB2 STH2r JMP2r
@emit
( &long SWP2 ,&short JSR )
&short SWP ,&byte JSR
&byte DUP #04 SFT ,&char JSR
&char #0f AND DUP #09 GTH #27 MUL ADD #30 ADD #18 DEO
JMP2r
@emit-digit ( n^ -> )
LIT '0 ADD emit JMP2r
@emit-dec ( n^ -> )
DUP #63 GTH ,&do3 JCN
DUP #09 GTH ,&do2 JCN
,&do1 JMP
&do3 #64 ;mod-div JSR2 ;emit-digit JSR2
&do2 #0a ;mod-div JSR2 ;emit-digit JSR2
&do1 ;emit-digit JSR2 JMP2r
@emit-dec2 ( n* -> )
DUP2 #270f GTH2 ,&do5 JCN
DUP2 #03e7 GTH2 ,&do4 JCN
DUP2 #0063 GTH2 ,&do3 JCN
DUP2 #0009 GTH2 ,&do2 JCN
,&do1 JMP
&do5 #2710 ;mod-div2 JSR2 NIP ;emit-digit JSR2
&do4 #03e8 ;mod-div2 JSR2 NIP ;emit-digit JSR2
&do3 #0064 ;mod-div2 JSR2 NIP ;emit-digit JSR2
&do2 #000a ;mod-div2 JSR2 NIP ;emit-digit JSR2
&do1 NIP ;emit-digit JSR2 JMP2r
@messages [ &input-error "input 20 "error 00
&bytes 20 "bytes 00
&lines 20 "lines 00
&saved "-- 20 00
&unsaved "** 20 00 ]
@tmp [ &pos :tmp/data
&data $100 ]
@term [ &cols 0050
&rows 0018 ]
@cursor [ &col 00 &row 00 ]
( did we just see ESC? )
@saw-esc 00
( )
@filename $80
( |1ffc )
( offset is address of the first visible line )
( size is total size of data in bytes )
@buffer [ &limit 0000
&offset :buffer/data
&line-count 0000
&line-offset 0000
&data $8000 ]