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Diffstat (limited to 'include/timeutils.h')
| -rw-r--r-- | include/timeutils.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/include/timeutils.h b/include/timeutils.h new file mode 100644 index 0000000..a195df8 --- /dev/null +++ b/include/timeutils.h @@ -0,0 +1,105 @@ +/* + * SPDX-License-Identifier: LGPL-2.1-or-later + * + * First set of functions in this file are part of systemd, and were + * copied to util-linux at August 2013. + * + * Copyright 2010 Lennart Poettering + * Copyright (C) 2014 Karel Zak <kzak@redhat.com> + * + * This is free software; you can redistribute it and/or modify it under the + * terms of the GNU Lesser General Public License as published by the Free + * Software Foundation; either version 2.1 of the License, or (at your option) + * any later version. + */ +#ifndef UTIL_LINUX_TIME_UTIL_H +#define UTIL_LINUX_TIME_UTIL_H + +#include <stdio.h> +#include <inttypes.h> +#include <sys/time.h> + +typedef uint64_t usec_t; +typedef uint64_t nsec_t; + +#define MSEC_PER_SEC 1000ULL +#define USEC_PER_SEC 1000000ULL +#define USEC_PER_MSEC 1000ULL +#define NSEC_PER_SEC 1000000000ULL +#define NSEC_PER_MSEC 1000000ULL +#define NSEC_PER_USEC 1000ULL + +#define USEC_PER_MINUTE (60ULL*USEC_PER_SEC) +#define NSEC_PER_MINUTE (60ULL*NSEC_PER_SEC) +#define USEC_PER_HOUR (60ULL*USEC_PER_MINUTE) +#define NSEC_PER_HOUR (60ULL*NSEC_PER_MINUTE) +#define USEC_PER_DAY (24ULL*USEC_PER_HOUR) +#define NSEC_PER_DAY (24ULL*NSEC_PER_HOUR) +#define USEC_PER_WEEK (7ULL*USEC_PER_DAY) +#define NSEC_PER_WEEK (7ULL*NSEC_PER_DAY) +#define USEC_PER_MONTH (2629800ULL*USEC_PER_SEC) +#define NSEC_PER_MONTH (2629800ULL*NSEC_PER_SEC) +#define USEC_PER_YEAR (31557600ULL*USEC_PER_SEC) +#define NSEC_PER_YEAR (31557600ULL*NSEC_PER_SEC) + +#define FORMAT_TIMESTAMP_MAX ((4*4+1)+11+9+4+1) /* weekdays can be unicode */ +#define FORMAT_TIMESTAMP_RELATIVE_MAX 256 +#define FORMAT_TIMESPAN_MAX 64 + +int parse_timestamp(const char *t, usec_t *usec); +int get_gmtoff(const struct tm *tp); + +/* flags and masks for strxxx_iso() functions */ +enum { + ISO_DATE = (1 << 0), + ISO_TIME = (1 << 1), + ISO_TIMEZONE = (1 << 2), + ISO_DOTUSEC = (1 << 3), + ISO_COMMAUSEC = (1 << 4), + ISO_T = (1 << 5), + ISO_GMTIME = (1 << 6), + ISO_TIMESTAMP = ISO_DATE | ISO_TIME | ISO_TIMEZONE, + ISO_TIMESTAMP_T = ISO_TIMESTAMP | ISO_T, + ISO_TIMESTAMP_DOT = ISO_TIMESTAMP | ISO_DOTUSEC, + ISO_TIMESTAMP_DOT_T = ISO_TIMESTAMP_DOT | ISO_T, + ISO_TIMESTAMP_COMMA = ISO_TIMESTAMP | ISO_COMMAUSEC, + ISO_TIMESTAMP_COMMA_T = ISO_TIMESTAMP_COMMA | ISO_T, + ISO_TIMESTAMP_COMMA_G = ISO_TIMESTAMP_COMMA | ISO_GMTIME, + ISO_TIMESTAMP_COMMA_GT = ISO_TIMESTAMP_COMMA_G | ISO_T +}; + +#define CTIME_BUFSIZ 26 +#define ISO_BUFSIZ 42 + +int strtimeval_iso(struct timeval *tv, int flags, char *buf, size_t bufsz); +int strtm_iso(struct tm *tm, int flags, char *buf, size_t bufsz); +int strtime_iso(const time_t *t, int flags, char *buf, size_t bufsz); + +#define UL_SHORTTIME_THISYEAR_HHMM (1 << 1) + +int strtime_short(const time_t *t, struct timeval *now, int flags, char *buf, size_t bufsz); + +#ifndef HAVE_TIMEGM +extern time_t timegm(struct tm *tm); +#endif + +static inline usec_t timeval_to_usec(const struct timeval *t) +{ + return t->tv_sec * USEC_PER_SEC + t->tv_usec; +} + +static inline usec_t timespec_to_usec(const struct timespec *t) +{ + return t->tv_sec * USEC_PER_SEC + t->tv_nsec / NSEC_PER_USEC; +} + +static inline struct timeval usec_to_timeval(usec_t t) +{ + struct timeval r = { + .tv_sec = t / USEC_PER_SEC, + .tv_usec = t % USEC_PER_SEC, + }; + return r; +} + +#endif /* UTIL_LINUX_TIME_UTIL_H */ |