1 /* $OpenBSD: timer.c,v 1.15 2016/08/27 02:11:27 guenther Exp $ */
2 /* $NetBSD: timer.c,v 1.3 1995/04/24 12:22:45 cgd Exp $ */
3
4 /*-
5 * Copyright (c) 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Barry Brachman.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include <sys/select.h>
37 #include <curses.h>
38 #include <setjmp.h>
39 #include <time.h>
40 #include <unistd.h>
41
42 #include "extern.h"
43
44 extern int TIMER_LINE, TIMER_COL;
45
46 static int waitch(long);
47
48 /*
49 * Update the display of the remaining time while waiting for a character
50 * If time runs out do a longjmp() to the game controlling routine, returning
51 * non-zero; oth. return the character
52 * Leave the cursor where it was initially
53 */
54 int
timerch(void)55 timerch(void)
56 {
57 extern int tlimit;
58 extern time_t start_t;
59 extern jmp_buf env;
60 time_t prevt, t;
61 int col, remaining, row;
62
63 getyx(stdscr, row, col);
64 prevt = 0L;
65 for (;;) {
66 if (waitch(1000L) == 1)
67 break;
68 time(&t);
69 if (t == prevt)
70 continue;
71 prevt = t;
72 remaining = tlimit - (int) (t - start_t);
73 if (remaining < 0) {
74 longjmp(env, 1);
75 }
76 move(TIMER_LINE, TIMER_COL);
77 printw("%d:%02d", remaining / 60, remaining % 60);
78 move(row, col);
79 refresh();
80 }
81 return (inputch());
82 }
83
84 /*
85 * Wait up to 'delay' microseconds for input to appear
86 * Returns 1 if input is ready, 0 oth.
87 */
88 static int
waitch(long delay)89 waitch(long delay)
90 {
91 fd_set fdbits;
92 struct timeval duration;
93
94 duration.tv_sec = 0;
95 duration.tv_usec = delay;
96 FD_ZERO(&fdbits);
97 FD_SET(STDIN_FILENO, &fdbits);
98 return (select(STDIN_FILENO+1, &fdbits, NULL, NULL, &duration));
99 }
100
101 void
delay(int tenths)102 delay(int tenths)
103 {
104 struct timeval duration;
105
106 duration.tv_usec = (tenths % 10 ) * 100000L;
107 duration.tv_sec = tenths / 10;
108 select(0, 0, 0, 0, &duration);
109 }
110