version 1.1, 1994/02/11 16:30:46
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version 1.10, 1997/09/13 12:04:56
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\ LOOK.FS xt -> lfa 22may93jaw |
\ LOOK.FS xt -> lfa 22may93jaw |
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\ Copyright (C) 1995 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
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\ Gforth is free software; you can redistribute it and/or |
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\ modify it under the terms of the GNU General Public License |
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\ as published by the Free Software Foundation; either version 2 |
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\ of the License, or (at your option) any later version. |
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\ This program is distributed in the hope that it will be useful, |
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\ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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\ GNU General Public License for more details. |
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\ You should have received a copy of the GNU General Public License |
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\ along with this program; if not, write to the Free Software |
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\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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\ Look checks first if the word is a primitive. If yes then the |
\ Look checks first if the word is a primitive. If yes then the |
\ vocabulary in the primitive area is beeing searched, meaning |
\ vocabulary in the primitive area is beeing searched, meaning |
\ creating for each word a xt and comparing it... |
\ creating for each word a xt and comparing it... |
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decimal |
decimal |
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\ >NAME PRIMSTART 22may93jaw |
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\ : >name ( xt -- nfa ) |
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\ BEGIN 1 chars - |
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\ dup c@ 128 and |
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\ UNTIL ; |
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: PrimStart ['] true >name ; |
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\ look 17may93jaw |
\ look 17may93jaw |
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\ rename to discover!!! |
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: (look) ( xt startlfa -- lfa flag ) |
: (look) ( xt startlfa -- lfa flag ) |
false swap |
false swap |
BEGIN @ dup |
BEGIN @ dup |
WHILE dup cell+ name> |
WHILE dup name>int |
3 pick = IF nip dup THEN |
3 pick = IF nip dup THEN |
REPEAT |
REPEAT |
drop nip |
drop nip |
dup 0<> ; |
dup 0<> ; |
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\ !!! nicht optimal! |
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[IFUNDEF] look |
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has? ec [IF] |
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has? rom |
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[IF] |
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: look |
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dup [ unlock rom-dictionary area lock ] |
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literal literal within |
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IF |
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>name dup ?? <> |
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ELSE |
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forth-wordlist @ (look) |
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THEN ; |
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[ELSE] |
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: look ( cfa -- lfa flag ) |
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>name dup ??? <> ; |
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[THEN] |
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[ELSE] |
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: PrimStart ['] true >name ; |
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: look ( cfa -- lfa flag ) |
: look ( cfa -- lfa flag ) |
dup forthstart u< |
dup dictionary-end forthstart within |
IF PrimStart (look) |
IF |
ELSE >name true THEN ; |
PrimStart (look) |
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ELSE |
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>name dup ??? <> |
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THEN ; |
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[THEN] |
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[THEN] |