BSD 4_3_Tahoe release

[unix-history] / usr / src / games / hangman / getguess.c

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley.  The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#ifndef lint
static char sccsid[] = "@(#)getguess.c  5.3 (Berkeley) 6/18/88";
#endif /* not lint */

# include       "hangman.h"

/*
* getguess:
*      Get another guess
*/
getguess()
{
       register int    i;
       register int    ch;
       register bool   correct;

       leaveok(stdscr, FALSE);
       for (;;) {
               move(PROMPTY, PROMPTX + sizeof "Guess: ");
               refresh();
               ch = readch();
               if (isalpha(ch)) {
                       if (isupper(ch))
                               ch = tolower(ch);
                       if (Guessed[ch - 'a'])
                               mvprintw(MESGY, MESGX, "Already guessed '%c'", ch);
                       else
                               break;
               }
               else if (ch == CTRL('D'))
                       die();
               else
                       mvprintw(MESGY, MESGX, "Not a valid guess: '%s'",
                               unctrl(ch));
       }
       leaveok(stdscr, TRUE);
       move(MESGY, MESGX);
       clrtoeol();

       Guessed[ch - 'a'] = TRUE;
       correct = FALSE;
       for (i = 0; Word[i] != '\0'; i++)
               if (Word[i] == ch) {
                       Known[i] = ch;
                       correct = TRUE;
               }
       if (!correct)
               Errors++;
}

/*
* readch;
*      Read a character from the input
*/
readch()
{
       register int    cnt, r;
       auto char       ch;

       cnt = 0;
       for (;;) {
               if (read(0, &ch, sizeof ch) <= 0)
               {
                       if (++cnt > 100)
                               die();
               }
               else if (ch == CTRL('L')) {
                       wrefresh(curscr);
                       mvcur(0, 0, curscr->_cury, curscr->_curx);
               }
               else
                       return ch;
       }
}