1 #ifndef _WIMLIB_TIMESTAMP_H
2 #define _WIMLIB_TIMESTAMP_H
9 #define intervals_per_second (1000000000ULL / 100ULL)
10 #define intervals_per_microsecond (10)
11 #define nanoseconds_per_interval (100)
12 #define days_per_year (365ULL)
13 #define seconds_per_day (3600ULL * 24ULL)
14 #define intervals_per_day (seconds_per_day * intervals_per_second)
15 #define intervals_per_year (intervals_per_day * days_per_year)
16 #define years_1601_to_1970 (1970ULL - 1601ULL)
17 #define leap_years_1601_to_1970 (years_1601_to_1970 / 4ULL - 3ULL)
18 #define intervals_1601_to_1970 (years_1601_to_1970 * intervals_per_year \
19 + leap_years_1601_to_1970 * intervals_per_day)
22 unix_timestamp_to_wim(time_t t)
24 return (u64)intervals_1601_to_1970 + t * intervals_per_second;
27 /* Converts a timestamp as used in the WIM file to a UNIX timestamp as used in
28 * the time() function. */
30 wim_timestamp_to_unix(u64 timestamp)
32 return (timestamp - intervals_1601_to_1970) / intervals_per_second;
36 timeval_to_wim_timestamp(const struct timeval tv)
38 return intervals_1601_to_1970
39 + (u64)tv.tv_sec * intervals_per_second
40 + (u64)tv.tv_usec * intervals_per_microsecond;
43 static inline struct timeval
44 wim_timestamp_to_timeval(u64 timestamp)
47 tv.tv_sec = (timestamp - intervals_1601_to_1970) / intervals_per_second;
48 tv.tv_usec = ((timestamp - intervals_1601_to_1970) /
49 intervals_per_microsecond) % 1000000;
54 timespec_to_wim_timestamp(const struct timespec ts)
56 return intervals_1601_to_1970
57 + (u64)ts.tv_sec * intervals_per_second
58 + (u64)ts.tv_nsec / nanoseconds_per_interval;
61 static inline struct timespec
62 wim_timestamp_to_timespec(u64 timestamp)
65 ts.tv_sec = (timestamp - intervals_1601_to_1970) / intervals_per_second;
66 ts.tv_nsec = ((timestamp - intervals_1601_to_1970) % intervals_per_second) *
67 nanoseconds_per_interval;
75 wim_timestamp_to_str(u64 timestamp, char *buf, size_t len);