games/hangman/getword.c

   1 /*      $OpenBSD: getword.c,v 1.8 2013/08/29 20:22:14 naddy Exp $       */
   2 /*      $NetBSD: getword.c,v 1.4 1995/03/23 08:32:45 cgd Exp $  */
   3
   4 /*
   5  * Copyright (c) 1983, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <stdlib.h>
  34 #include "hangman.h"
  35 #include "pathnames.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         int badwords, countwords;
  48         size_t wordlen;
  49
  50         inf = Dict;
  51         badwords = 0;
  52         /* Make sure the dictionary file is valid if it's not the default */
  53         countwords = strcmp(Dict_name, _PATH_DICT);
  54         while (badwords < MAXBADWORDS) {
  55                 if (countwords)
  56                         badwords++;
  57                 pos = arc4random_uniform(Dict_size);
  58                 fseek(inf, pos, SEEK_SET);
  59                 if (fgets(Word, BUFSIZ, inf) == NULL)
  60                         continue;
  61                 if (fgets(Word, BUFSIZ, inf) == NULL)
  62                         continue;
  63                 wordlen = strlen(Word);
  64                 if (wordlen > 0 && Word[wordlen - 1] == '\n')
  65                         Word[wordlen - 1] = '\0';
  66                 if (wordlen < MINLEN || wordlen > MAXLEN)
  67                         continue;
  68                 for (wp = Word; *wp; wp++)
  69                         if (!islower(*wp))
  70                                 goto cont;
  71                 break;
  72 cont:           ;
  73         }
  74         if (badwords >= MAXBADWORDS) {
  75                 mvcur(0, COLS - 1, LINES - 1, 0);
  76                 endwin();
  77                 errx(1, "file %s appears to be incorrectly formatted\n(Need one lower-case word per line)",
  78                         Dict_name);
  79         }
  80         gp = Known;
  81         wp = Word;
  82         while (*wp != '\0') {
  83                 *gp++ = '-';
  84                 wp++;
  85         }
  86         *gp = '\0';
  87 }