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459e4ace93
timegm() is like mktime() in that it converts a struct tm to a timestamp, but it treats the struct tm as UTC instead of as local time. timegm() is nonstandard, but availabe in both Linux and BSD, and it's a useful function to have.
91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <sys/cdefs.h>
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#include <sys/types.h>
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__BEGIN_DECLS
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struct tm {
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int tm_sec; /* Seconds (0-60) */
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int tm_min; /* Minutes (0-59) */
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int tm_hour; /* Hours (0-23) */
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int tm_mday; /* Day of the month (1-31) */
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int tm_mon; /* Month (0-11) */
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int tm_year; /* Year - 1900 */
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int tm_wday; /* Day of the week (0-6, Sunday = 0) */
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int tm_yday; /* Day in the year (0-365, 1 Jan = 0) */
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int tm_isdst; /* Daylight saving time */
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};
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extern long timezone; /* The difference in seconds between UTC and local time */
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extern long altzone;
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extern char* tzname[2];
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extern int daylight;
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typedef uint32_t clock_t;
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typedef int64_t time_t;
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struct tm* localtime(const time_t*);
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struct tm* gmtime(const time_t*);
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time_t mktime(struct tm*);
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time_t timegm(struct tm*);
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time_t time(time_t*);
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char* ctime(const time_t*);
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void tzset();
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char* asctime(const struct tm*);
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#define CLOCKS_PER_SEC 1000
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clock_t clock();
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struct timespec {
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time_t tv_sec;
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long tv_nsec;
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};
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typedef int clockid_t;
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#define CLOCK_REALTIME 0
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#define CLOCK_MONOTONIC 1
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#define TIMER_ABSTIME 99
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int clock_gettime(clockid_t, struct timespec*);
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int clock_settime(clockid_t, struct timespec*);
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int clock_nanosleep(clockid_t, int flags, const struct timespec* requested_sleep, struct timespec* remaining_sleep);
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int clock_getres(clockid_t, struct timespec* result);
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int nanosleep(const struct timespec* requested_sleep, struct timespec* remaining_sleep);
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struct tm* gmtime_r(const time_t* timep, struct tm* result);
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struct tm* localtime_r(const time_t* timep, struct tm* result);
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double difftime(time_t, time_t);
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size_t strftime(char* s, size_t max, const char* format, const struct tm*);
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#define difftime(t1, t0) (double)(t1 - t0)
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__END_DECLS
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