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 static int waitch(long); 45 46 /* 47 * Update the display of the remaining time while waiting for a character 48 * If time runs out do a longjmp() to the game controlling routine, returning 49 * non-zero; oth. return the character 50 * Leave the cursor where it was initially 51 */ 52 int 53 timerch(void) 54 { 55 time_t prevt, t; 56 int col, remaining, row; 57 58 getyx(stdscr, row, col); 59 prevt = 0L; 60 for (;;) { 61 if (waitch(1000L) == 1) 62 break; 63 time(&t); 64 if (t == prevt) 65 continue; 66 prevt = t; 67 remaining = tlimit - (int) (t - start_t); 68 if (remaining < 0) { 69 longjmp(env, 1); 70 } 71 move(TIMER_LINE, TIMER_COL); 72 printw("%d:%02d", remaining / 60, remaining % 60); 73 move(row, col); 74 refresh(); 75 } 76 return (inputch()); 77 } 78 79 /* 80 * Wait up to 'delay' microseconds for input to appear 81 * Returns 1 if input is ready, 0 oth. 82 */ 83 static int 84 waitch(long delay) 85 { 86 fd_set fdbits; 87 struct timeval duration; 88 89 duration.tv_sec = 0; 90 duration.tv_usec = delay; 91 FD_ZERO(&fdbits); 92 FD_SET(STDIN_FILENO, &fdbits); 93 return (select(STDIN_FILENO+1, &fdbits, NULL, NULL, &duration)); 94 } 95 96 void 97 delay(int tenths) 98 { 99 struct timeval duration; 100 101 duration.tv_usec = (tenths % 10 ) * 100000L; 102 duration.tv_sec = tenths / 10; 103 select(0, 0, 0, 0, &duration); 104 } 105