usr/src/games/battlestar/parse.c

/*
 * Copyright (c) 1983, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)parse.c     8.2 (Berkeley) 4/28/95";
#endif /* not lint */

#include "extern.h"

wordinit()
{
        register struct wlist *w;

        for (w = wlist; w->string; w++)
                install(w);
}

hash(s)
        register char *s;
{
        register hashval = 0;

        while (*s) {
                hashval += *s++;
                hashval *= HASHMUL;
                hashval &= HASHMASK;
        }
        return hashval;
}

struct wlist *
lookup(s)
        char *s;
{
        register struct wlist *wp;

        for (wp = hashtab[hash(s)]; wp != NULL; wp = wp->next)
                if (*s == *wp->string && strcmp(s, wp->string) == 0)
                        return wp;
        return NULL;
}

install(wp)
        register struct wlist *wp;
{
        int hashval;

        if (lookup(wp->string) == NULL) {
                hashval = hash(wp->string);
                wp->next = hashtab[hashval];
                hashtab[hashval] = wp;
        } else
                printf("Multiply defined %s.\n", wp->string);
}

parse()
{
        register struct wlist *wp;
        register n;

        wordnumber = 0;           /* for cypher */
        for (n = 0; n <= wordcount; n++) {
                if ((wp = lookup(words[n])) == NULL) {
                        wordvalue[n] = -1;
                        wordtype[n] = -1;
                } else {
                        wordvalue[n] = wp -> value;
                        wordtype[n] = wp -> article;
                }
        }
}