games/hangman/getguess.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  * @(#)getguess.c       8.1 (Berkeley) 5/31/93
  30  * $FreeBSD: src/games/hangman/getguess.c,v 1.6 1999/12/10 03:22:59 billf Exp $
  31  * $DragonFly: src/games/hangman/getguess.c,v 1.3 2005/02/13 18:57:30 cpressey Exp $
  32  */
  33
  34 #include <sys/ttydefaults.h>
  35 #include "hangman.h"
  36
  37 /*
  38  * getguess:
  39  *      Get another guess
  40  */
  41 void
  42 getguess(void)
  43 {
  44         int i;
  45         int ch;
  46         bool correct;
  47
  48         leaveok(stdscr, FALSE);
  49         for (;;) {
  50                 move(PROMPTY, PROMPTX + sizeof("Guess: "));
  51                 refresh();
  52                 ch = readch();
  53                 if (isalpha(ch)) {
  54                         if (isupper(ch))
  55                                 ch = tolower(ch);
  56                         if (Guessed[ch - 'a'])
  57                                 mvprintw(MESGY, MESGX, "Already guessed '%c'", ch);
  58                         else
  59                                 break;
  60                 }
  61                 else if (ch == CTRL('D'))
  62                         die(0);
  63                 else
  64                         mvprintw(MESGY, MESGX, "Not a valid guess: '%s'",
  65                                 unctrl(ch));
  66         }
  67         leaveok(stdscr, TRUE);
  68         move(MESGY, MESGX);
  69         clrtoeol();
  70
  71         Guessed[ch - 'a'] = TRUE;
  72         correct = FALSE;
  73         for (i = 0; Word[i] != '\0'; i++) {
  74                 if (Word[i] == ch) {
  75                         Known[i] = ch;
  76                         correct = TRUE;
  77                 }
  78         }
  79         if (!correct)
  80                 Errors++;
  81 }
  82
  83 /*
  84  * readch;
  85  *      Read a character from the input
  86  */
  87 char
  88 readch(void)
  89 {
  90         int cnt;
  91         char ch;
  92         int x, y;
  93
  94         cnt = 0;
  95         for (;;) {
  96                 if (read(STDIN_FILENO, &ch, sizeof(ch)) <= 0) {
  97                         if (++cnt > 100)
  98                                 die(0);
  99                 } else if (ch == CTRL('L')) {
 100                         wrefresh(curscr);
 101                         getyx(curscr, y, x);
 102                         mvcur(0, 0, y, x);
 103                 } else
 104                         return ch;
 105         }
 106 }