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e83d0967 RK |
1 | /* |
2 | * This file is part of DisOrder. | |
4778e044 | 3 | * Copyright (C) 2007-2009 Richard Kettlewell |
e83d0967 | 4 | * |
e7eb3a27 | 5 | * This program is free software: you can redistribute it and/or modify |
e83d0967 | 6 | * it under the terms of the GNU General Public License as published by |
e7eb3a27 | 7 | * the Free Software Foundation, either version 3 of the License, or |
e83d0967 | 8 | * (at your option) any later version. |
e7eb3a27 RK |
9 | * |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
e83d0967 | 15 | * You should have received a copy of the GNU General Public License |
e7eb3a27 | 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
e83d0967 | 17 | */ |
132a5a4a RK |
18 | /** @file lib/timeval.h |
19 | * @brief Arithmetic on timeval structures | |
20 | */ | |
e83d0967 RK |
21 | #ifndef TIMEVAL_H |
22 | #define TIMEVAL_H | |
23 | ||
05b75f8d | 24 | #include <time.h> |
19844d4f | 25 | #include <sys/time.h> |
05b75f8d | 26 | |
e83d0967 RK |
27 | static inline struct timeval tvsub(const struct timeval a, |
28 | const struct timeval b) { | |
29 | struct timeval r; | |
30 | ||
31 | r.tv_sec = a.tv_sec - b.tv_sec; | |
32 | r.tv_usec = a.tv_usec - b.tv_usec; | |
33 | if(r.tv_usec < 0) { | |
34 | r.tv_usec += 1000000; | |
35 | r.tv_sec--; | |
36 | } | |
37 | if(r.tv_usec > 999999) { | |
38 | r.tv_usec -= 1000000; | |
39 | r.tv_sec++; | |
40 | } | |
41 | return r; | |
42 | } | |
43 | ||
81cd1894 RK |
44 | static inline struct timeval tvadd(const struct timeval a, |
45 | const struct timeval b) { | |
46 | struct timeval r; | |
47 | ||
48 | r.tv_sec = a.tv_sec + b.tv_sec; | |
49 | r.tv_usec = a.tv_usec + b.tv_usec; | |
50 | if(r.tv_usec < 0) { | |
51 | r.tv_usec += 1000000; | |
52 | r.tv_sec--; | |
53 | } | |
54 | if(r.tv_usec > 999999) { | |
55 | r.tv_usec -= 1000000; | |
56 | r.tv_sec++; | |
57 | } | |
58 | return r; | |
59 | } | |
60 | ||
61 | static inline double tvdouble(const struct timeval a) { | |
62 | return a.tv_sec + a.tv_usec / 1000000.0; | |
63 | } | |
64 | ||
189e9830 RK |
65 | static inline int64_t tvsub_us(const struct timeval a, |
66 | const struct timeval b) { | |
7aa087a7 RK |
67 | return (((uint64_t)a.tv_sec * 1000000 + a.tv_usec) |
68 | - ((uint64_t)b.tv_sec * 1000000 + b.tv_usec)); | |
69 | } | |
70 | ||
3af7813d RK |
71 | /** @brief Great-than comparison for timevals */ |
72 | static inline int tvgt(const struct timeval *a, const struct timeval *b) { | |
73 | if(a->tv_sec > b->tv_sec) | |
74 | return 1; | |
75 | if(a->tv_sec == b->tv_sec | |
76 | && a->tv_usec > b->tv_usec) | |
77 | return 1; | |
78 | return 0; | |
79 | } | |
80 | ||
81 | /** @brief Less-than | |
82 | comparison for timevals */ | |
83 | static inline int tvlt(const struct timeval *a, const struct timeval *b) { | |
84 | if(a->tv_sec < b->tv_sec) | |
85 | return 1; | |
86 | if(a->tv_sec == b->tv_sec | |
87 | && a->tv_usec < b->tv_usec) | |
88 | return 1; | |
89 | return 0; | |
90 | } | |
91 | ||
92 | /** @brief Greater-than-or-equal comparison for timevals */ | |
93 | static inline int tvge(const struct timeval *a, const struct timeval *b) { | |
94 | return !tvlt(a, b); | |
95 | } | |
96 | ||
97 | /** @brief Less-than-or-equal comparison for timevals */ | |
98 | static inline int tvle(const struct timeval *a, const struct timeval *b) { | |
99 | return !tvgt(a, b); | |
100 | } | |
101 | ||
e83d0967 RK |
102 | #endif /* TIMEVAL_H */ |
103 | ||
104 | /* | |
105 | Local Variables: | |
106 | c-basic-offset:2 | |
107 | comment-column:40 | |
108 | fill-column:79 | |
109 | indent-tabs-mode:nil | |
110 | End: | |
111 | */ |