parse.c revision 1.2 
1/*
2 * Copyright (c) 1983 Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35/*static char sccsid[] = "from: @(#)parse.c	5.3 (Berkeley) 6/1/90";*/
36static char rcsid[] = "$Id: parse.c,v 1.2 1993/08/01 18:55:53 mycroft Exp $";
37#endif /* not lint */
38
39#include "externs.h"
40
41wordinit()
42{
43	register struct wlist *w;
44
45	for (w = wlist; w->string; w++)
46		install(w);
47}
48
49hash(s)
50	register char *s;
51{
52	register hashval = 0;
53
54	while (*s) {
55		hashval += *s++;
56		hashval *= HASHMUL;
57		hashval &= HASHMASK;
58	}
59	return hashval;
60}
61
62struct wlist *
63lookup(s)
64	char *s;
65{
66	register struct wlist *wp;
67
68	for (wp = hashtab[hash(s)]; wp != NULL; wp = wp->next)
69		if (*s == *wp->string && strcmp(s, wp->string) == 0)
70			return wp;
71	return NULL;
72}
73
74install(wp)
75	register struct wlist *wp;
76{
77	int hashval;
78
79	if (lookup(wp->string) == NULL) {
80		hashval = hash(wp->string);
81		wp->next = hashtab[hashval];
82		hashtab[hashval] = wp;
83	} else
84		printf("Multiply defined %s.\n", wp->string);
85}
86
87parse()
88{
89	register struct wlist *wp;
90	register n;
91
92	wordnumber = 0;           /* for cypher */
93	for (n = 0; n <= wordcount; n++) {
94		if ((wp = lookup(words[n])) == NULL) {
95			wordvalue[n] = -1;
96			wordtype[n] = -1;
97		} else {
98			wordvalue[n] = wp -> value;
99			wordtype[n] = wp -> article;
100		}
101	}
102}
103