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. 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  * @(#)getword.c        8.1 (Berkeley) 5/31/93
  30  * $FreeBSD: src/games/hangman/getword.c,v 1.6 1999/12/10 03:22:59 billf Exp $
  31  * $DragonFly: src/games/hangman/getword.c,v 1.3 2005/02/13 18:57:30 cpressey Exp $
  32  */
  33
  34 #include "hangman.h"
  35 #include <stdlib.h>
  36
  37 /*
  38  * getword:
  39  *      Get a valid word out of the dictionary file
  40  */
  41 void
  42 getword(void)
  43 {
  44         FILE *inf;
  45         char *wp, *gp;
  46         long  pos;
  47
  48         inf = Dict;
  49         for (;;) {
  50                 pos = (double)random() / (RAND_MAX + 1.0) * (double)Dict_size;
  51                 fseek(inf, pos, SEEK_SET);
  52                 if (fgets(Word, BUFSIZ, inf) == NULL)
  53                         continue;
  54                 if (fgets(Word, BUFSIZ, inf) == NULL)
  55                         continue;
  56                 Word[strlen(Word) - 1] = '\0';
  57                 if (strlen(Word) < MINLEN)
  58                         continue;
  59                 for (wp = Word; *wp != '\0'; wp++) {
  60                         if (!islower(*wp))
  61                                 continue;
  62                 }
  63                 break;
  64         }
  65         gp = Known;
  66         wp = Word;
  67         while (*wp != '\0') {
  68                 *gp++ = '-';
  69                 wp++;
  70         }
  71         *gp = '\0';
  72 }