games/battlestar/parse.c

   1 /*-
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)parse.c  8.1 (Berkeley) 5/31/93
  30  * $FreeBSD: src/games/battlestar/parse.c,v 1.5.2.1 2001/03/05 11:45:36 kris Exp $
  31  * $DragonFly: src/games/battlestar/parse.c,v 1.4 2006/08/08 16:47:20 pavalos Exp $
  32  */
  33
  34 #include "externs.h"
  35
  36 static int hash(const char *);
  37 static void install(struct wlist *);
  38 static struct wlist *lookup(const char *);
  39
  40 void
  41 wordinit(void)
  42 {
  43         struct wlist *w;
  44
  45         for (w = wlist; w->string; w++)
  46                 install(w);
  47 }
  48
  49 static int
  50 hash(const char *s)
  51 {
  52         int hashval;
  53
  54         hashval = 0;
  55         while (*s) {
  56                 hashval += *s++;
  57                 hashval *= HASHMUL;
  58                 hashval &= HASHMASK;
  59         }
  60         return hashval;
  61 }
  62
  63 static struct wlist *
  64 lookup(const char *s)
  65 {
  66         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
  74 static void
  75 install(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
  87 void
  88 parse(void)
  89 {
  90         struct wlist *wp;
  91         int n;
  92
  93         wordnumber = 0;         /* for cypher */
  94         for (n = 0; n <= wordcount; n++) {
  95                 if ((wp = lookup(words[n])) == NULL) {
  96                         wordvalue[n] = -1;
  97                         wordtype[n] = -1;
  98                 } else {
  99                         wordvalue[n] = wp->value;
 100                         wordtype[n] = wp->article;
 101                 }
 102         }
 103 }