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parse.c revision 1.3 
      1 /*	$NetBSD: parse.c,v 1.3 1995/03/21 15:07:48 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1983, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)parse.c	8.1 (Berkeley) 5/31/93";
     39 #else
     40 static char rcsid[] = "$NetBSD: parse.c,v 1.3 1995/03/21 15:07:48 cgd Exp $";
     41 #endif
     42 #endif /* not lint */
     43 
     44 #include "externs.h"
     45 
     46 wordinit()
     47 {
     48 	register struct wlist *w;
     49 
     50 	for (w = wlist; w->string; w++)
     51 		install(w);
     52 }
     53 
     54 hash(s)
     55 	register char *s;
     56 {
     57 	register hashval = 0;
     58 
     59 	while (*s) {
     60 		hashval += *s++;
     61 		hashval *= HASHMUL;
     62 		hashval &= HASHMASK;
     63 	}
     64 	return hashval;
     65 }
     66 
     67 struct wlist *
     68 lookup(s)
     69 	char *s;
     70 {
     71 	register struct wlist *wp;
     72 
     73 	for (wp = hashtab[hash(s)]; wp != NULL; wp = wp->next)
     74 		if (*s == *wp->string && strcmp(s, wp->string) == 0)
     75 			return wp;
     76 	return NULL;
     77 }
     78 
     79 install(wp)
     80 	register struct wlist *wp;
     81 {
     82 	int hashval;
     83 
     84 	if (lookup(wp->string) == NULL) {
     85 		hashval = hash(wp->string);
     86 		wp->next = hashtab[hashval];
     87 		hashtab[hashval] = wp;
     88 	} else
     89 		printf("Multiply defined %s.\n", wp->string);
     90 }
     91 
     92 parse()
     93 {
     94 	register struct wlist *wp;
     95 	register n;
     96 
     97 	wordnumber = 0;           /* for cypher */
     98 	for (n = 0; n <= wordcount; n++) {
     99 		if ((wp = lookup(words[n])) == NULL) {
    100 			wordvalue[n] = -1;
    101 			wordtype[n] = -1;
    102 		} else {
    103 			wordvalue[n] = wp -> value;
    104 			wordtype[n] = wp -> article;
    105 		}
    106 	}
    107 }
    108