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[gforth] /
gforth /
look.fs
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1.8:
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Sun Jul 6 14:29:33 1997 UTC (25 years, 8 months ago) by
jwilke
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See got some more bug fixes.
Quick changes to let all cross-compile, and fit into ec-version.
These files are still on my ToDo list, changes are not complete now.
Jens
\ LOOK.FS xt -> lfa 22may93jaw
\ Copyright (C) 1995 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.
\ Look checks first if the word is a primitive. If yes then the
\ vocabulary in the primitive area is beeing searched, meaning
\ creating for each word a xt and comparing it...
\ If a word is no primitive look searches backwards to find the nfa.
\ Problems: A compiled xt via compile, might be created with noname:
\ a noname: leaves now a empty name field
decimal
\ look 17may93jaw
\ rename to discover!!!
: (look) ( xt startlfa -- lfa flag )
false swap
BEGIN @ dup
WHILE dup name>int
3 pick = IF nip dup THEN
REPEAT
drop nip
dup 0<> ;
\ !!! nicht optimal!
[IFUNDEF] look
[IFUNDEF] dictionary-end has-rom [ELSE] false [THEN]
[IF]
: look ( cfa -- lfa flag )
forth-wordlist @ (look) ;
[ELSE]
: PrimStart ['] true >name ;
: look ( cfa -- lfa flag )
dup dictionary-end forthstart within
IF
PrimStart (look)
ELSE
>name dup ??? <>
THEN ;
[THEN]
[THEN]
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