119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* First set of functions in this file are part of systemd, and were
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* copied to util-linux at August 2013.
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*
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* Copyright 2010 Lennart Poettering
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* Copyright (C) 2014 Karel Zak <kzak@redhat.com>
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*
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* This is free software; you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free
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* Software Foundation; either version 2.1 of the License, or (at your option)
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* any later version.
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*/
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#ifndef UTIL_LINUX_TIME_UTIL_H
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#define UTIL_LINUX_TIME_UTIL_H
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#include <stdio.h>
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#include <inttypes.h>
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#include <sys/time.h>
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#include <stdbool.h>
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typedef uint64_t usec_t;
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typedef uint64_t nsec_t;
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#define MSEC_PER_SEC 1000ULL
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#define USEC_PER_SEC 1000000ULL
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#define USEC_PER_MSEC 1000ULL
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#define NSEC_PER_SEC 1000000000ULL
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#define NSEC_PER_MSEC 1000000ULL
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#define NSEC_PER_USEC 1000ULL
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#define USEC_PER_MINUTE (60ULL*USEC_PER_SEC)
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#define NSEC_PER_MINUTE (60ULL*NSEC_PER_SEC)
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#define USEC_PER_HOUR (60ULL*USEC_PER_MINUTE)
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#define NSEC_PER_HOUR (60ULL*NSEC_PER_MINUTE)
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#define USEC_PER_DAY (24ULL*USEC_PER_HOUR)
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#define NSEC_PER_DAY (24ULL*NSEC_PER_HOUR)
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#define USEC_PER_WEEK (7ULL*USEC_PER_DAY)
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#define NSEC_PER_WEEK (7ULL*NSEC_PER_DAY)
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#define USEC_PER_MONTH (2629800ULL*USEC_PER_SEC)
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#define NSEC_PER_MONTH (2629800ULL*NSEC_PER_SEC)
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#define USEC_PER_YEAR (31557600ULL*USEC_PER_SEC)
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#define NSEC_PER_YEAR (31557600ULL*NSEC_PER_SEC)
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#define FORMAT_TIMESTAMP_MAX ((4*4+1)+11+9+4+1) /* weekdays can be unicode */
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#define FORMAT_TIMESTAMP_RELATIVE_MAX 256
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#define FORMAT_TIMESPAN_MAX 64
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int parse_timestamp(const char *t, usec_t *usec);
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int get_gmtoff(const struct tm *tp);
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/* flags and masks for strxxx_iso() functions */
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enum {
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ISO_DATE = (1 << 0),
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ISO_TIME = (1 << 1),
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ISO_TIMEZONE = (1 << 2),
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ISO_DOTUSEC = (1 << 3),
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ISO_COMMAUSEC = (1 << 4),
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ISO_DOTNSEC = (1 << 5),
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ISO_COMMANSEC = (1 << 6),
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ISO_T = (1 << 7),
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ISO_GMTIME = (1 << 8),
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ISO_TIMESTAMP = ISO_DATE | ISO_TIME | ISO_TIMEZONE,
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ISO_TIMESTAMP_T = ISO_TIMESTAMP | ISO_T,
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ISO_TIMESTAMP_DOT = ISO_TIMESTAMP | ISO_DOTUSEC,
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ISO_TIMESTAMP_DOT_T = ISO_TIMESTAMP_DOT | ISO_T,
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ISO_TIMESTAMP_COMMA = ISO_TIMESTAMP | ISO_COMMAUSEC,
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ISO_TIMESTAMP_COMMA_T = ISO_TIMESTAMP_COMMA | ISO_T,
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ISO_TIMESTAMP_COMMA_G = ISO_TIMESTAMP_COMMA | ISO_GMTIME,
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ISO_TIMESTAMP_COMMA_GT = ISO_TIMESTAMP_COMMA_G | ISO_T
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};
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#define CTIME_BUFSIZ 26
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#define ISO_BUFSIZ 42
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int strtimeval_iso(const struct timeval *tv, int flags, char *buf, size_t bufsz);
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int strtm_iso(const struct tm *tm, int flags, char *buf, size_t bufsz);
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int strtime_iso(const time_t *t, int flags, char *buf, size_t bufsz);
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int strtimespec_iso(const struct timespec *t, int flags, char *buf, size_t bufsz);
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int strtimespec_relative(const struct timespec *ts, char *buf, size_t bufsz);
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#define UL_SHORTTIME_THISYEAR_HHMM (1 << 1)
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int strtime_short(const time_t *t, struct timeval *now, int flags, char *buf, size_t bufsz);
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#ifndef HAVE_TIMEGM
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extern time_t timegm(struct tm *tm);
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#endif
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static inline usec_t timeval_to_usec(const struct timeval *t)
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{
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return t->tv_sec * USEC_PER_SEC + t->tv_usec;
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}
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static inline usec_t timespec_to_usec(const struct timespec *t)
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{
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return t->tv_sec * USEC_PER_SEC + t->tv_nsec / NSEC_PER_USEC;
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}
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static inline struct timeval usec_to_timeval(usec_t t)
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{
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struct timeval r = {
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.tv_sec = t / USEC_PER_SEC,
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.tv_usec = t % USEC_PER_SEC,
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};
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return r;
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}
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static inline bool is_timespecset(const struct timespec *t)
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{
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return t->tv_sec || t->tv_nsec;
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}
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static inline double time_diff(const struct timeval *a, const struct timeval *b)
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{
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return (a->tv_sec - b->tv_sec) + (a->tv_usec - b->tv_usec) / (double) USEC_PER_SEC;
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}
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#endif /* UTIL_LINUX_TIME_UTIL_H */
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