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1 | \ ========== Copyright Header Begin ========================================== |
2 | \ | |
3 | \ Hypervisor Software File: sift.fth | |
4 | \ | |
5 | \ Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
6 | \ | |
7 | \ - Do no alter or remove copyright notices | |
8 | \ | |
9 | \ - Redistribution and use of this software in source and binary forms, with | |
10 | \ or without modification, are permitted provided that the following | |
11 | \ conditions are met: | |
12 | \ | |
13 | \ - Redistribution of source code must retain the above copyright notice, | |
14 | \ this list of conditions and the following disclaimer. | |
15 | \ | |
16 | \ - Redistribution in binary form must reproduce the above copyright notice, | |
17 | \ this list of conditions and the following disclaimer in the | |
18 | \ documentation and/or other materials provided with the distribution. | |
19 | \ | |
20 | \ Neither the name of Sun Microsystems, Inc. or the names of contributors | |
21 | \ may be used to endorse or promote products derived from this software | |
22 | \ without specific prior written permission. | |
23 | \ | |
24 | \ This software is provided "AS IS," without a warranty of any kind. | |
25 | \ ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
26 | \ INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
27 | \ PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN | |
28 | \ MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR | |
29 | \ ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR | |
30 | \ DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN | |
31 | \ OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR | |
32 | \ FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE | |
33 | \ DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, | |
34 | \ ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF | |
35 | \ SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. | |
36 | \ | |
37 | \ You acknowledge that this software is not designed, licensed or | |
38 | \ intended for use in the design, construction, operation or maintenance of | |
39 | \ any nuclear facility. | |
40 | \ | |
41 | \ ========== Copyright Header End ============================================ | |
42 | \ sift.fth 2.11 99/05/04 | |
43 | \ Copyright 1985-1990 Bradley Forthware | |
44 | ||
45 | also hidden | |
46 | only forth also hidden also definitions | |
47 | decimal | |
48 | headerless | |
49 | ||
50 | variable sift-vocabulary | |
51 | ||
52 | \ Leave a "hook" for showing the name of the vocabulary | |
53 | \ only once, the first time a matching name is found. | |
54 | \ Showing the name of a device can be plugged in here also... | |
55 | defer .voc ['] noop is .voc | |
56 | ||
57 | : .in ( -- ) ??cr tabstops @ spaces ." In " ; | |
58 | : .vocab ( -- ) | |
59 | .in ['] vocabulary .name space | |
60 | sift-vocabulary @ .name cr | |
61 | ['] noop is .voc | |
62 | ; | |
63 | ||
64 | \ Show the "sifted" name, preceded by its cfa in parentheses. | |
65 | \ Show the name of the vocabulary only the first time. | |
66 | \ Control the display with exit? | |
67 | : .sift? ( nfa -- exit? ) | |
68 | .voc | |
69 | exit? tuck if drop exit then ( exit? nfa ) | |
70 | dup name> ( exit? nfa cfa ) | |
71 | over n>flags c@ h# 20 and if token@ then \ Handle aliases | |
72 | fake-name ( nfa fstr ) | |
73 | over name>string nip | |
74 | over name>string nip + 3 + .tab | |
75 | .id .id 2 spaces | |
76 | ; | |
77 | ||
78 | \ Sift through the given vocabulary, using the sift-string given. | |
79 | \ Control the display with exit? | |
80 | : vsift? ( adr,len voc-acf -- exit? ) | |
81 | dup sift-vocabulary ! | |
82 | -rot 2>r 0 swap ( alf voc-acf ) ( r: adr,len ) | |
83 | begin another-word? while ( alf' voc-acf nfa ) ( r: adr,len ) | |
84 | dup 2r@ rot name>string sindex ( alf' voc-acf nfa indx|-1 ) ( r: adr,len ) | |
85 | 1+ if .sift? if ( alf' voc-acf ) ( r: adr,len ) | |
86 | 2drop 2r> 2drop true exit | |
87 | then ( alf' voc-acf ) ( r: adr,len ) | |
88 | else ( alf' voc-acf nfa ) ( r: adr,len ) | |
89 | drop ( alf' voc-acf ) ( r: adr,len ) | |
90 | then ( alf' voc-acf ) ( r: adr,len ) | |
91 | repeat 2r> 2drop false ( false ) | |
92 | ; | |
93 | ||
94 | headers | |
95 | forth definitions | |
96 | ||
97 | \ Sift through all the vocabularies for the string given | |
98 | \ on the stack as addr,len | |
99 | : $sift ( adr,len -- ) | |
100 | voc-link begin another-link? while ( adr,len v-link ) | |
101 | ['] .vocab is .voc ( adr,len v-link ) | |
102 | voc> >r ( adr,len ) ( r: voc-acf ) | |
103 | 2dup r@ vsift? if r> 3drop exit then ( adr,len ) ( r: voc-acf ) | |
104 | r> >voc-link ( adr,len v-link' ) | |
105 | repeat 2drop ( ) | |
106 | ; | |
107 | ||
108 | \ Same thing, only the string is given on the stack in packed format | |
109 | : sift ( str -- ) count $sift ; | |
110 | ||
111 | \ Same thing, only the string is given in the input stream. | |
112 | : sifting \ name ( -- ) | |
113 | safe-parse-word $sift | |
114 | ; | |
115 | ||
116 | only forth also definitions |