/*      $NetBSD: timer.c,v 1.4 1997/10/10 12:04:36 lukem Exp $  */

/*-
 * Copyright (c) 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Barry Brachman.
 *
 * 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.
 */

#include <sys/cdefs.h>
#ifndef lint
#if (0==0)
static char sccsid[] = "@(#)timer.c     8.2 (Berkeley) 2/22/94";
#else
__RCSID("$NetBSD: timer.c,v 1.4 1997/10/10 12:04:36 lukem Exp $");
#endif
#endif /* not lint */

#include <sys/param.h>
#include <sys/time.h>

#include <curses.h>
#include <setjmp.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>

#include "bog.h"
#include "extern.h"

static int waitch __P((long));

/*
 * Update the display of the remaining time while waiting for a character
 * If time runs out do a longjmp() to the game controlling routine, returning
 * non-zero; oth. return the character
 * Leave the cursor where it was initially
 */
int
timerch()
{
        extern int tlimit;
        extern time_t start_t;
        extern jmp_buf env;
        time_t prevt, t;
        int col, remaining, row;

        getyx(stdscr, row, col);
        prevt = 0L;
        for (;;) {
                if (waitch(1000L) == 1)
                        break;
                time(&t);
                if (t == prevt)
                        continue;
                prevt = t;
                remaining = tlimit - (int) (t - start_t);
                if (remaining < 0) {
                        longjmp(env, 1);
                        /*NOTREACHED*/
                }
                move(TIMER_LINE, TIMER_COL);
                printw("%d:%02d", remaining / 60, remaining % 60);
                move(row, col);
                refresh();
        }
        return (getch() & 0177);
}

/*
 * Wait up to 'delay' microseconds for input to appear
 * Returns 1 if input is ready, 0 oth.
 */
static int
waitch(delay)
        long delay;
{
        fd_set fdbits;
        struct timeval duration;

        duration.tv_sec = 0;
        duration.tv_usec = delay;
        FD_ZERO(&fdbits);
        FD_SET(STDIN_FILENO, &fdbits);
        return (select(32, &fdbits, NULL, NULL, &duration));
}

void
delay(tenths)
        int tenths;
{
        struct timeval duration;

        duration.tv_usec = (tenths % 10 ) * 100000L;
        duration.tv_sec = (long) (tenths / 10);
        select(32, 0, 0, 0, &duration);
}