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. 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  * @(#)getguess.c       8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/hangman/getguess.c,v 1.6 1999/12/10 03:22:59 billf Exp $
  35  * $DragonFly: src/games/hangman/getguess.c,v 1.3 2005/02/13 18:57:30 cpressey Exp $
  36  */
  37
  38 #include <sys/ttydefaults.h>
  39 #include "hangman.h"
  40
  41 /*
  42  * getguess:
  43  *      Get another guess
  44  */
  45 void
  46 getguess(void)
  47 {
  48         int     i;
  49         int     ch;
  50         bool    correct;
  51
  52         leaveok(stdscr, FALSE);
  53         for (;;) {
  54                 move(PROMPTY, PROMPTX + sizeof("Guess: "));
  55                 refresh();
  56                 ch = readch();
  57                 if (isalpha(ch)) {
  58                         if (isupper(ch))
  59                                 ch = tolower(ch);
  60                         if (Guessed[ch - 'a'])
  61                                 mvprintw(MESGY, MESGX, "Already guessed '%c'", ch);
  62                         else
  63                                 break;
  64                 }
  65                 else if (ch == CTRL('D'))
  66                         die(0);
  67                 else
  68                         mvprintw(MESGY, MESGX, "Not a valid guess: '%s'",
  69                                 unctrl(ch));
  70         }
  71         leaveok(stdscr, TRUE);
  72         move(MESGY, MESGX);
  73         clrtoeol();
  74
  75         Guessed[ch - 'a'] = TRUE;
  76         correct = FALSE;
  77         for (i = 0; Word[i] != '\0'; i++) {
  78                 if (Word[i] == ch) {
  79                         Known[i] = ch;
  80                         correct = TRUE;
  81                 }
  82         }
  83         if (!correct)
  84                 Errors++;
  85 }
  86
  87 /*
  88  * readch;
  89  *      Read a character from the input
  90  */
  91 char
  92 readch(void)
  93 {
  94         int     cnt;
  95         char    ch;
  96         int     x, y;
  97
  98         cnt = 0;
  99         for (;;) {
 100                 if (read(0, &ch, sizeof(ch)) <= 0) {
 101                         if (++cnt > 100)
 102                                 die(0);
 103                 } else if (ch == CTRL('L')) {
 104                         wrefresh(curscr);
 105                         getyx(curscr, y, x);
 106                         mvcur(0, 0, y, x);
 107                 } else
 108                         return ch;
 109         }
 110 }