battlestar/parse.c

   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 }