mirror of
https://github.com/forth-ev/VolksForth.git
synced 2024-11-29 21:49:17 +00:00
172 lines
3.8 KiB
Forth
172 lines
3.8 KiB
Forth
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\ *** Block No. 0, Hexblock 0
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\ include for stream sources for cp/m phz 10apr23
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\ loadscreen content while debugging read-seq esp. dos-error?
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1 +load \ /tib tibeof eolf?
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create tib /tib 1+ allot variable #tib #tib off
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2 3 +thru
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: pushfile r> isfile push fromfile push >r ; restrict
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: iopen ( -- )
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pushfile use cr file?
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isfile@ incfile ! b/rec rec-offset c!
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incpos push incpos off incpos 2+ dup push off
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0 incfile @ record 1- c! ;
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: iread ( -- )
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freadline cr . cr tib #tib @ type cr ;
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\ *** Block No. 1, Hexblock 1
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\ load screen phz 06mai23
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onlyforth dos also forth definitions
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: idos-error? ( n -- f ) 0<> ;
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: iread-seq ( dosfcb -- f ) $14 bdosa idos-error? ;
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1 6 +thru
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\ *** Block No. 2, Hexblock 2
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\ fib /fib #fib eolf? phz 06okt22
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context @ dos also context !
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$50 constant /tib
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variable tibeof tibeof off
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: eolf? ( c -- f )
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\ f=-1: not yet eol; store c and continue
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\ f=0: eol but not yet eof; return line and flag continue
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\ f=1: eof: return line and flag eof
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tibeof off
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dup #lf = IF drop 0 exit THEN
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-1 = IF tibeof on 1 ELSE -1 THEN ;
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\ *** Block No. 3, Hexblock 3
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\ incfile incpos inc-fgetc phz 07mai23
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variable incfile
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variable incpos 2 allot
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create rec-offset 1 allot $80 constant dmabuf
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: inc-fgetc ( -- c )
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rec-offset c@ b/rec u< 0= IF dmabuf dma!
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incfile @ drive iread-seq IF ." eof" -1 exit THEN
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0 rec-offset c! THEN
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rec-offset c@ dup 1+ rec-offset c! dmabuf + c@
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; \\
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incfile @ f.handle @ 0= IF
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incpos 2@ incfile @ fseek THEN
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incfile @ fgetc
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incpos 2@ 1. d+ incpos 2! ;
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\ *** Block No. 4, Hexblock 4
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\ freadline probe-for-fb phz 06okt22
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: freadline ( -- eof )
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tib /tib bounds DO
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inc-fgetc dup eolf? under 0< IF I c! ELSE drop THEN
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0< 0= IF I tib - #tib ! ENDLOOP tibeof @ exit THEN
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LOOP /tib #tib !
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." warning: line exteeds max " /tib . cr
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." extra chars ignored" cr
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BEGIN inc-fgetc eolf? 1+ UNTIL tibeof @ ;
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| : probe-for-fb ( -- flag )
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\ probes whether current file name has no .FTH extension
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isfile@ extension dup @ $dfdf and $5446 =
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swap 2+ c@ $df and $48 = and not ;
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\ *** Block No. 5, Hexblock 5
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\ save/restoretib phz 06okt22
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$50 constant /stash
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create stash[ /stash allot here constant ]stash
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variable stash> stash[ stash> !
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: savetib ( -- n )
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#tib @ >in @ - dup stash> @ + ]stash u>
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abort" tib stash overflow" >r
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tib >in @ + stash> @ r@ cmove
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r@ stash> +! r> ;
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: restoretib ( n -- )
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dup >r negate stash> +! stash> @ tib r@ cmove
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r> #tib ! >in off ;
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\ *** Block No. 6, Hexblock 6
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\ interpret-via-tib include phz 07mai23
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: xinterpret tib #tib @ type cr ;
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: interpret-via-tib
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BEGIN freadline >r .status >in off xinterpret
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r> UNTIL ;
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: pushfile r> isfile push fromfile push >r ; restrict
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: xinclude ( -- )
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pushfile use cr file? cr
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probe-for-fb IF 1 load exit THEN
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incfile push isfile@ incfile ! b/rec rec-offset c!
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incpos push incpos off incpos 2+ dup push off
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0 incfile @ record 1- c!
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savetib >r interpret-via-tib close r> restoretib ;
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: (stashquit stash[ stash> ! (quit ;
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: stashrestore ['] (stashquit IS 'quit ;
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' stashrestore IS 'restart
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\ *** Block No. 7, Hexblock 7
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\ \ phz 05apr22
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\\
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: \ blk @ IF >in @ negate c/l mod >in +!
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ELSE #tib @ >in ! THEN ; immediate
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\ : \needs have 0=exit
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\ blk @ IF >in @ negate c/l mod >in +!
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\ ELSE #tib @ >in ! THEN ;
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\ *** Block No. 8, Hexblock 8
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