games/hangman/getword.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. 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  * @(#)getword.c        8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/hangman/getword.c,v 1.6 1999/12/10 03:22:59 billf Exp $
  35  * $DragonFly: src/games/hangman/getword.c,v 1.3 2005/02/13 18:57:30 cpressey Exp $
  36  */
  37
  38 #include "hangman.h"
  39 #include <stdlib.h>
  40
  41 /*
  42  * getword:
  43  *      Get a valid word out of the dictionary file
  44  */
  45 void
  46 getword(void)
  47 {
  48         FILE    *inf;
  49         char    *wp, *gp;
  50         long     pos;
  51
  52         inf = Dict;
  53         for (;;) {
  54                 pos = (double)random() / (RAND_MAX + 1.0) * (double)Dict_size;
  55                 fseek(inf, pos, 0);
  56                 if (fgets(Word, BUFSIZ, inf) == NULL)
  57                         continue;
  58                 if (fgets(Word, BUFSIZ, inf) == NULL)
  59                         continue;
  60                 Word[strlen(Word) - 1] = '\0';
  61                 if (strlen(Word) < MINLEN)
  62                         continue;
  63                 for (wp = Word; *wp != '\0'; wp++) {
  64                         if (!islower(*wp))
  65                                 continue;
  66                 }
  67                 break;
  68         }
  69         gp = Known;
  70         wp = Word;
  71         while (*wp != '\0') {
  72                 *gp++ = '-';
  73                 wp++;
  74         }
  75         *gp = '\0';
  76 }