1 /* $NetBSD: timeval.c,v 1.2 2017/01/28 21:31:50 christos Exp $ */
2
3 /*
4 * Copyright (c) 1999 Kungliga Tekniska Högskolan
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
48 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
timevalfix(struct timeval * t1)49 timevalfix(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
65 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
timevaladd(struct timeval * t1,const struct timeval * t2)66 timevaladd(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
77 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
timevalsub(struct timeval * t1,const struct timeval * t2)78 timevalsub(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