Include sys/time.h in timestamp.h
[wimlib] / src / timestamp.h
1 #ifndef _WIMLIB_TIMESTAMP_H
2 #define _WIMLIB_TIMESTAMP_H
3
4 #include "util.h"
5 #include <sys/types.h>
6 #include <sys/time.h>
7
8 #define intervals_per_second (1000000000ULL / 100ULL)
9 #define intervals_per_microsecond (10)
10 #define nanoseconds_per_interval (100)
11 #define days_per_year (365ULL)
12 #define seconds_per_day (3600ULL * 24ULL)
13 #define intervals_per_day (seconds_per_day * intervals_per_second)
14 #define intervals_per_year (intervals_per_day * days_per_year)
15 #define years_1601_to_1970 (1970ULL - 1601ULL)
16 #define leap_years_1601_to_1970 (years_1601_to_1970 / 4ULL - 3ULL)
17 #define intervals_1601_to_1970 (years_1601_to_1970 * intervals_per_year \
18                                 + leap_years_1601_to_1970 * intervals_per_day)
19
20 static inline u64 unix_timestamp_to_wim(time_t t)
21 {
22         return (u64)intervals_1601_to_1970 + t * intervals_per_second;
23 }
24
25
26 /* Converts a timestamp as used in the WIM file to a UNIX timestamp as used in
27  * the time() function. */
28 static inline time_t wim_timestamp_to_unix(u64 timestamp)
29 {
30         return (timestamp - intervals_1601_to_1970) / intervals_per_second;
31 }
32
33 static inline u64 timeval_to_wim_timestamp(const struct timeval *tv)
34 {
35         return intervals_1601_to_1970
36                + (u64)tv->tv_sec * intervals_per_second
37                + (u64)tv->tv_usec * intervals_per_microsecond;
38 }
39
40 static inline void wim_timestamp_to_timeval(u64 timestamp, struct timeval *tv)
41 {
42         tv->tv_sec = (timestamp - intervals_1601_to_1970) / intervals_per_second;
43         tv->tv_usec = ((timestamp - intervals_1601_to_1970) /
44                         intervals_per_microsecond) % 1000000;
45 }
46
47 static inline u64 timespec_to_wim_timestamp(const struct timespec *ts)
48 {
49         return intervals_1601_to_1970
50                + (u64)ts->tv_sec * intervals_per_second
51                + (u64)ts->tv_nsec / nanoseconds_per_interval;
52 }
53
54
55 extern u64 get_wim_timestamp();
56
57 #endif