VolksForth/8086/msdos/src/include.fb

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\ include for stream sources phz 06jan22 \ load screen phz 06feb22 1 6 +thru \ fib /fib #fib eolf? phz 06feb22 context @ dos also context ! $50 constant /tib variable tibeof tibeof off : eolf? ( c -- f ) \ f=-1: not yet eol; store c and continue \ f=0: eol but not yet eof; return line and flag continue \ f=1: eof: return line and flag eof tibeof off dup #lf = IF drop 0 exit THEN -1 = IF tibeof on 1 ELSE -1 THEN ; \ incfile incpos inc-fgetc phz 06feb22 variable incfile variable incpos 2 allot : inc-fgetc ( -- c ) incfile @ f.handle @ 0= IF incpos 2@ incfile @ fseek THEN incfile @ fgetc incpos 2@ 1. d+ incpos 2! ; \ freadline probe-for-fb phz 06feb22 : freadline ( -- eof ) tib /tib bounds DO inc-fgetc dup eolf? under 0< IF I c! ELSE drop THEN 0< 0= IF I tib - #tib ! ENDLOOP tibeof @ exit THEN LOOP /tib #tib ! ." warning: line exteeds max " /tib . cr ." extra chars ignored" cr BEGIN inc-fgetc eolf? 1+ UNTIL tibeof @ ; | : probe-for-fb ( -- flag ) \ probes whether current file looks like a block file /tib 2+ 0 DO isfile@ fgetc #lf = IF ENDLOOP false exit THEN LOOP true ; \ save/restoretib phz 16jan22 $50 constant /stash create stash[ /stash allot here constant ]stash variable stash> stash[ stash> ! : savetib ( -- n ) #tib @ >in @ - dup stash> @ + ]stash u> abort" tib stash overflow" >r tib >in @ + stash> @ r@ cmove r@ stash> +! r> ; : restoretib ( n -- ) dup >r negate stash> +! stash> @ tib r@ cmove r> #tib ! >in off ; \ interpret-via-tib include phz 06feb22 : interpret-via-tib BEGIN freadline >r .status >in off interpret r> UNTIL ; : include ( -- ) pushfile use cr file? probe-for-fb isfile@ freset IF 1 load close exit THEN incfile push isfile@ incfile ! incpos push incpos off incpos 2+ dup push off savetib >r interpret-via-tib close r> restoretib ; : (stashquit stash[ stash> ! (quit ; : stashrestore ['] (stashquit IS 'quit ; ' stashrestore IS 'restart \ \ phz 16jan22 : \ blk @ IF >in @ negate c/l mod >in +! ELSE #tib @ >in ! THEN ; immediate