1 /*-
2 * Copyright (c) 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Barry Brachman.
7 *
8 * %sccs.include.redist.c%
9 */
10
11 #ifndef lint
12 static char sccsid[] = "@(#)timer.c 8.2 (Berkeley) 02/22/94";
13 #endif /* not lint */
14
15 #include <sys/param.h>
16 #include <sys/time.h>
17
18 #include <curses.h>
19 #include <setjmp.h>
20 #include <stdio.h>
21 #include <unistd.h>
22
23 #include "bog.h"
24 #include "extern.h"
25
26 static int waitch __P((long));
27
28 /*
29 * Update the display of the remaining time while waiting for a character
30 * If time runs out do a longjmp() to the game controlling routine, returning
31 * non-zero; oth. return the character
32 * Leave the cursor where it was initially
33 */
34 int
timerch()35 timerch()
36 {
37 extern int tlimit;
38 extern long start_t;
39 extern jmp_buf env;
40 long prevt, t;
41 int col, remaining, row;
42
43 getyx(stdscr, row, col);
44 prevt = 0L;
45 for (;;) {
46 if (waitch(1000L) == 1)
47 break;
48 time(&t);
49 if (t == prevt)
50 continue;
51 prevt = t;
52 remaining = tlimit - (int) (t - start_t);
53 if (remaining < 0) {
54 longjmp(env, 1);
55 /*NOTREACHED*/
56 }
57 move(TIMER_LINE, TIMER_COL);
58 printw("%d:%02d", remaining / 60, remaining % 60);
59 move(row, col);
60 refresh();
61 }
62 return (getch() & 0177);
63 }
64
65 /*
66 * Wait up to 'delay' microseconds for input to appear
67 * Returns 1 if input is ready, 0 oth.
68 */
69 static int
waitch(delay)70 waitch(delay)
71 long delay;
72 {
73 fd_set fdbits;
74 struct timeval duration;
75
76 duration.tv_sec = 0;
77 duration.tv_usec = delay;
78 FD_ZERO(&fdbits);
79 FD_SET(STDIN_FILENO, &fdbits);
80 return (select(32, &fdbits, NULL, NULL, &duration));
81 }
82
83 void
delay(tenths)84 delay(tenths)
85 int tenths;
86 {
87 struct timeval duration;
88
89 duration.tv_usec = (tenths % 10 ) * 100000L;
90 duration.tv_sec = (long) (tenths / 10);
91 select(32, 0, 0, 0, &duration);
92 }
93