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      1 /*	$NetBSD: timer.c,v 1.10 2005/07/01 16:38:24 jmc Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Barry Brachman.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  */
     34 
     35 #include <sys/cdefs.h>
     36 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)timer.c	8.2 (Berkeley) 2/22/94";
     39 #else
     40 __RCSID("$NetBSD: timer.c,v 1.10 2005/07/01 16:38:24 jmc Exp $");
     41 #endif
     42 #endif /* not lint */
     43 
     44 #include <sys/param.h>
     45 #include <sys/time.h>
     46 #include <sys/poll.h>
     47 
     48 #include <curses.h>
     49 #include <setjmp.h>
     50 #include <string.h>
     51 #include <stdio.h>
     52 #include <unistd.h>
     53 
     54 #include "bog.h"
     55 #include "extern.h"
     56 
     57 static int waitch(int);
     58 
     59 extern int tlimit;
     60 extern time_t start_t;
     61 extern jmp_buf env;
     62 
     63 /*
     64  * Update the display of the remaining time while waiting for a character
     65  * If time runs out do a longjmp() to the game controlling routine, returning
     66  * non-zero; oth. return the character
     67  * Leave the cursor where it was initially
     68  */
     69 int
     70 timerch(void)
     71 {
     72 	time_t prevt, t;
     73 	int col, remaining, row;
     74 
     75 	getyx(stdscr, row, col);
     76 	prevt = 0L;
     77 	for (;;) {
     78 		if (waitch(1) == 1)
     79 			break;
     80 		time(&t);
     81 		if (t == prevt)
     82 			continue;
     83 		prevt = t;
     84 		remaining = tlimit - (int) (t - start_t);
     85 		if (remaining < 0) {
     86 			longjmp(env, 1);
     87 			/*NOTREACHED*/
     88 		}
     89 		move(TIMER_LINE, TIMER_COL);
     90 		printw("%d:%02d", remaining / 60, remaining % 60);
     91 		move(row, col);
     92 		refresh();
     93 	}
     94 	return (getch() & 0177);
     95 }
     96 
     97 /*
     98  * Wait up to 'delay' microseconds for input to appear
     99  * Returns 1 if input is ready, 0 oth.
    100  */
    101 static int
    102 waitch(int tdelay)
    103 {
    104 	struct pollfd set[1];
    105 
    106 	set[0].fd = STDIN_FILENO;
    107 	set[0].events = POLLIN;
    108 	return (poll(set, 1, tdelay));
    109 }
    110 
    111 void
    112 delay(int tenths)
    113 {
    114 	struct timespec duration;
    115 
    116 	duration.tv_nsec = (tenths % 10 ) * 100000000L;
    117 	duration.tv_sec = (long) (tenths / 10);
    118 	nanosleep(&duration, NULL);
    119 }
    120