1 /* 2 * Copyright (c) 1999 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* 35 * Timeval stuff 36 */ 37 38 #ifdef HAVE_CONFIG_H 39 #include <config.h> 40 RCSID("$Id: timeval.c 14773 2005-04-12 11:29:18Z lha $"); 41 #endif 42 43 #include "roken.h" 44 45 /* 46 * Make `t1' consistent. 47 */ 48 49 void ROKEN_LIB_FUNCTION 50 timevalfix(struct timeval *t1) 51 { 52 if (t1->tv_usec < 0) { 53 t1->tv_sec--; 54 t1->tv_usec += 1000000; 55 } 56 if (t1->tv_usec >= 1000000) { 57 t1->tv_sec++; 58 t1->tv_usec -= 1000000; 59 } 60 } 61 62 /* 63 * t1 += t2 64 */ 65 66 void ROKEN_LIB_FUNCTION 67 timevaladd(struct timeval *t1, const struct timeval *t2) 68 { 69 t1->tv_sec += t2->tv_sec; 70 t1->tv_usec += t2->tv_usec; 71 timevalfix(t1); 72 } 73 74 /* 75 * t1 -= t2 76 */ 77 78 void ROKEN_LIB_FUNCTION 79 timevalsub(struct timeval *t1, const struct timeval *t2) 80 { 81 t1->tv_sec -= t2->tv_sec; 82 t1->tv_usec -= t2->tv_usec; 83 timevalfix(t1); 84 } 85