version 1.7, 1997/03/27 13:31:02
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version 1.14, 2000/09/23 15:06:01
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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. |
\ Copyright (C) 1995,1996,1997,2000 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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Line 28
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Line 28
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decimal |
decimal |
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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 |
Line 41 decimal
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Line 41 decimal
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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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>head-noprim 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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>head-noprim dup ??? <> ; |
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[THEN] |
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[ELSE] |
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: PrimStart ['] true >head-noprim ; |
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: look ( cfa -- lfa flag ) |
: look ( cfa -- lfa flag ) |
dup dictionary-end forthstart within |
dup in-dictionary? |
IF |
IF |
PrimStart (look) |
>head-noprim dup ??? <> |
ELSE |
ELSE |
>name dup ??? <> |
PrimStart (look) |
THEN ; |
THEN ; |
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[THEN] |
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[THEN] |
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: >head ( cfa -- nt|0 ) \ gforth to-head |
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\G tries to find the name token nt of the word represented by cfa; |
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\G returns 0 if it fails. This word is not absolutely reliable, |
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\G it may give false positives and produce wrong nts. |
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look and ; |
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' >head ALIAS >name \ gforth to-name |
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\G old name of @code{>head} |