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
timerch(void)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
waitch(int tdelay)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
delay(int tenths)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