chiark / gitweb /
partial tests for kvp.c
[disorder] / lib / timeval.h
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1/*
2 * This file is part of DisOrder.
3 * Copyright (C) 2007 Richard Kettlewell
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
20
21#ifndef TIMEVAL_H
22#define TIMEVAL_H
23
24static inline struct timeval tvsub(const struct timeval a,
25 const struct timeval b) {
26 struct timeval r;
27
28 r.tv_sec = a.tv_sec - b.tv_sec;
29 r.tv_usec = a.tv_usec - b.tv_usec;
30 if(r.tv_usec < 0) {
31 r.tv_usec += 1000000;
32 r.tv_sec--;
33 }
34 if(r.tv_usec > 999999) {
35 r.tv_usec -= 1000000;
36 r.tv_sec++;
37 }
38 return r;
39}
40
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41static inline struct timeval tvadd(const struct timeval a,
42 const struct timeval b) {
43 struct timeval r;
44
45 r.tv_sec = a.tv_sec + b.tv_sec;
46 r.tv_usec = a.tv_usec + b.tv_usec;
47 if(r.tv_usec < 0) {
48 r.tv_usec += 1000000;
49 r.tv_sec--;
50 }
51 if(r.tv_usec > 999999) {
52 r.tv_usec -= 1000000;
53 r.tv_sec++;
54 }
55 return r;
56}
57
58static inline double tvdouble(const struct timeval a) {
59 return a.tv_sec + a.tv_usec / 1000000.0;
60}
61
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62static inline int64_t tvsub_us(const struct timeval a,
63 const struct timeval b) {
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64 return (((uint64_t)a.tv_sec * 1000000 + a.tv_usec)
65 - ((uint64_t)b.tv_sec * 1000000 + b.tv_usec));
66}
67
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68#endif /* TIMEVAL_H */
69
70/*
71Local Variables:
72c-basic-offset:2
73comment-column:40
74fill-column:79
75indent-tabs-mode:nil
76End:
77*/