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, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)getguess.c  5.4 (Berkeley) 6/1/90";
#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;
        }
}