\ EXTEND.FS CORE-EXT Word not fully tested! 12may93jaw \ Copyright (C) 1995,1998 Free Software Foundation, Inc. \ This file is part of Gforth. \ Gforth is free software; you can redistribute it and/or \ modify it under the terms of the GNU General Public License \ as published by the Free Software Foundation; either version 2 \ of the License, or (at your option) any later version. \ This program is distributed in the hope that it will be useful, \ but WITHOUT ANY WARRANTY; without even the implied warranty of \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the \ GNU General Public License for more details. \ You should have received a copy of the GNU General Public License \ along with this program; if not, write to the Free Software \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. \ May be cross-compiled decimal \ .( 12may93jaw : .( ( compilation "..." -- ) \ core-ext dot-paren [char] ) parse type ; immediate \ VALUE 2>R 2R> 2R@ 17may93jaw \ !! 2value : 2Literal ( compilation w1 w2 -- ; run-time -- w1 w2 ) \ double two-literal swap postpone Literal postpone Literal ; immediate restrict ' drop alias d>s ( d -- n ) \ double d_to_s : m*/ ( d1 n2 u3 -- dqout ) \ double m-star-slash >r s>d >r abs -rot s>d r> xor r> swap >r >r dabs rot tuck um* 2swap um* swap >r 0 d+ r> -rot r@ um/mod -rot r> um/mod nip swap r> IF dnegate THEN ; \ CASE OF ENDOF ENDCASE 17may93jaw \ just as described in dpANS5 0 CONSTANT case ( compilation -- case-sys ; run-time -- ) \ core-ext immediate : of ( compilation -- of-sys ; run-time x1 x2 -- |x1 ) \ core-ext \ !! the implementation does not match the stack effect 1+ >r postpone over postpone = postpone if postpone drop r> ; immediate : endof ( compilation case-sys1 of-sys -- case-sys2 ; run-time -- ) \ core-ext end-of >r postpone else r> ; immediate : endcase ( compilation case-sys -- ; run-time x -- ) \ core-ext end-case postpone drop 0 ?do postpone then loop ; immediate \ C" 17may93jaw : (c") "lit ; : CLiteral postpone (c") here over char+ allot place align ; immediate restrict : C" ( compilation "..." -- ; run-time -- c-addr ) \ core-ext c-quote [char] " parse postpone CLiteral ; immediate restrict \ [COMPILE] 17may93jaw : [compile] ( compilation "name" -- ; run-time ? -- ? ) \ core-ext bracket-compile comp' drop compile, ; immediate \ CONVERT 17may93jaw : convert ( ud1 c-addr1 -- ud2 c-addr2 ) \ core-ext \G obsolescent; superseded by @code{>number}. char+ true >number drop ; \ ERASE 17may93jaw : erase ( addr len -- ) \ core-ext \ !! dependence on "1 chars 1 =" ( 0 1 chars um/mod nip ) 0 fill ; : blank ( addr len -- ) \ string bl fill ; \ SEARCH 02sep94py : search ( c-addr1 u1 c-addr2 u2 -- c-addr3 u3 flag ) \ string \ not very efficient; but if we want efficiency, we'll do it as primitive 2>r 2dup begin dup r@ >= while over 2r@ swap -text 0= if 2swap 2drop 2r> 2drop true exit endif 1 /string repeat 2drop 2r> 2drop false ; \ SOURCE-ID SAVE-INPUT RESTORE-INPUT 11jun93jaw : source-id ( -- 0 | -1 | fileid ) \ core-ext,file source-i-d loadfile @ dup 0= IF drop sourceline# 0 min THEN ; : save-input ( -- x1 .. xn n ) \ core-ext >in @ loadfile @ if loadfile @ file-position throw else blk @ linestart @ then sourceline# >tib @ source-id 6 ; : restore-input ( x1 .. xn n -- flag ) \ core-ext 6 <> -12 and throw source-id <> -12 and throw >tib ! >r ( line# ) loadfile @ 0<> if loadfile @ reposition-file throw else linestart ! blk ! sourceline# r@ <> blk @ 0= and loadfile @ 0= and if drop rdrop true EXIT then then r> loadline ! >in ! false ; \ This things we don't need, but for being complete... jaw \ EXPECT SPAN 17may93jaw variable span ( -- a-addr ) \ core-ext \ obsolescent : expect ( c-addr +len -- ) \ core-ext \ obsolescent; use accept 0 rot over BEGIN ( maxlen span c-addr pos1 ) key decode ( maxlen span c-addr pos2 flag ) >r 2over = r> or UNTIL 2 pick swap /string type nip span ! ; \ marker 18dec94py \ Marker creates a mark that is removed (including everything \ defined afterwards) when executing the mark. : marker, ( -- mark ) here dup A, voclink @ A, voclink BEGIN @ dup WHILE dup 0 wordlist-link - @ A, REPEAT drop udp @ , ; : marker! ( mark -- ) dup @ swap cell+ dup @ voclink ! cell+ voclink BEGIN @ dup WHILE over @ over 0 wordlist-link - ! swap cell+ swap REPEAT drop voclink BEGIN @ dup WHILE dup 0 wordlist-link - rehash REPEAT drop @ udp ! dp ! \ clean up vocabulary stack 0 vp @ 0 ?DO vp cell+ I cells + @ dup here > IF drop ELSE swap 1+ THEN LOOP dup 0= or set-order \ -1 set-order if order is empty get-current here > IF forth-wordlist set-current THEN ; : marker ( "mark" -- ) marker, Create A, DOES> ( -- ) @ marker! ;