games/hangman/getword.c

   1 /*      $NetBSD: getword.c,v 1.8 2003/08/07 09:37:21 agc 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. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)getword.c   8.1 (Berkeley) 5/31/93";
  36 #else
  37 __RCSID("$NetBSD: getword.c,v 1.8 2003/08/07 09:37:21 agc Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include "hangman.h"
  42
  43 /*
  44  * getword:
  45  *      Get a valid word out of the dictionary file
  46  */
  47 void
  48 getword()
  49 {
  50         FILE *inf;
  51         char *wp, *gp;
  52         long pos;
  53
  54         inf = Dict;
  55         for (;;) {
  56                 pos = (double) rand() / (RAND_MAX + 1.0) * (double) Dict_size;
  57                 fseek(inf, pos, SEEK_SET);
  58                 if (fgets(Word, BUFSIZ, inf) == NULL)
  59                         continue;
  60                 if (fgets(Word, BUFSIZ, inf) == NULL)
  61                         continue;
  62                 Word[strlen(Word) - 1] = '\0';
  63                 if (strlen(Word) < Minlen)
  64                         continue;
  65                 for (wp = Word; *wp; wp++)
  66                         if (!islower((unsigned char)*wp))
  67                                 goto cont;
  68                 break;
  69 cont:           ;
  70         }
  71         gp = Known;
  72         wp = Word;
  73         while (*wp) {
  74                 *gp++ = '-';
  75                 wp++;
  76         }
  77         *gp = '\0';
  78 }