1/* $NetBSD: timeval.c,v 1.2 2017/01/28 21:31:50 christos Exp $ */ 2 3/* 4 * Copyright (c) 1999 Kungliga Tekniska H��gskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 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 * 19 * 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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/* 37 * Timeval stuff 38 */ 39 40#include <config.h> 41 42#include <krb5/roken.h> 43 44/* 45 * Make `t1' consistent. 46 */ 47 48ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL 49timevalfix(struct timeval *t1) 50{ 51 if (t1->tv_usec < 0) { 52 t1->tv_sec--; 53 t1->tv_usec += 1000000; 54 } 55 if (t1->tv_usec >= 1000000) { 56 t1->tv_sec++; 57 t1->tv_usec -= 1000000; 58 } 59} 60 61/* 62 * t1 += t2 63 */ 64 65ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL 66timevaladd(struct timeval *t1, const struct timeval *t2) 67{ 68 t1->tv_sec += t2->tv_sec; 69 t1->tv_usec += t2->tv_usec; 70 timevalfix(t1); 71} 72 73/* 74 * t1 -= t2 75 */ 76 77ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL 78timevalsub(struct timeval *t1, const struct timeval *t2) 79{ 80 t1->tv_sec -= t2->tv_sec; 81 t1->tv_usec -= t2->tv_usec; 82 timevalfix(t1); 83} 84