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| 1 : | anton | 1.1 | \ LOOK.FS xt -> lfa 22may93jaw |
| 2 : | |||
| 3 : | anton | 1.3 | \ Copyright (C) 1995 Free Software Foundation, Inc. |
| 4 : | |||
| 5 : | \ This file is part of Gforth. | ||
| 6 : | |||
| 7 : | \ Gforth is free software; you can redistribute it and/or | ||
| 8 : | \ modify it under the terms of the GNU General Public License | ||
| 9 : | \ as published by the Free Software Foundation; either version 2 | ||
| 10 : | \ of the License, or (at your option) any later version. | ||
| 11 : | |||
| 12 : | \ This program is distributed in the hope that it will be useful, | ||
| 13 : | \ but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 : | \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 15 : | \ GNU General Public License for more details. | ||
| 16 : | |||
| 17 : | \ You should have received a copy of the GNU General Public License | ||
| 18 : | \ along with this program; if not, write to the Free Software | ||
| 19 : | \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
| 20 : | |||
| 21 : | anton | 1.1 | \ Look checks first if the word is a primitive. If yes then the |
| 22 : | \ vocabulary in the primitive area is beeing searched, meaning | ||
| 23 : | \ creating for each word a xt and comparing it... | ||
| 24 : | |||
| 25 : | \ If a word is no primitive look searches backwards to find the nfa. | ||
| 26 : | \ Problems: A compiled xt via compile, might be created with noname: | ||
| 27 : | \ a noname: leaves now a empty name field | ||
| 28 : | |||
| 29 : | decimal | ||
| 30 : | |||
| 31 : | : PrimStart ['] true >name ; | ||
| 32 : | |||
| 33 : | \ look 17may93jaw | ||
| 34 : | |||
| 35 : | : (look) ( xt startlfa -- lfa flag ) | ||
| 36 : | false swap | ||
| 37 : | BEGIN @ dup | ||
| 38 : | anton | 1.5 | WHILE dup name>int |
| 39 : | anton | 1.1 | 3 pick = IF nip dup THEN |
| 40 : | REPEAT | ||
| 41 : | drop nip | ||
| 42 : | dup 0<> ; | ||
| 43 : | |||
| 44 : | : look ( cfa -- lfa flag ) | ||
| 45 : | anton | 1.7 | dup dictionary-end forthstart within |
| 46 : | anton | 1.6 | IF |
| 47 : | PrimStart (look) | ||
| 48 : | ELSE | ||
| 49 : | >name dup ??? <> | ||
| 50 : | THEN ; | ||
| 51 : | anton | 1.1 |
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