102 lines
2.9 KiB
C++
102 lines
2.9 KiB
C++
/*
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* Copyright 2007-2019 Content Management AG
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* All rights reserved.
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*
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* author: Max Kellermann <mk@cm4all.com>
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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
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "Convert.hxx"
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#include "Zone.hxx"
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#include <stdexcept>
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#include <time.h>
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#ifdef _WIN32
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#include <winsock.h> /* for struct timeval */
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#else
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#include <sys/time.h> /* for struct timeval */
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#endif
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struct tm
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GmTime(std::chrono::system_clock::time_point tp)
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{
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const time_t t = std::chrono::system_clock::to_time_t(tp);
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#ifdef _WIN32
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const struct tm *tm = gmtime(&t);
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#else
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struct tm buffer, *tm = gmtime_r(&t, &buffer);
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#endif
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if (tm == nullptr)
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throw std::runtime_error("gmtime_r() failed");
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return *tm;
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}
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struct tm
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LocalTime(std::chrono::system_clock::time_point tp)
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{
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const time_t t = std::chrono::system_clock::to_time_t(tp);
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#ifdef _WIN32
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const struct tm *tm = localtime(&t);
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#else
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struct tm buffer, *tm = localtime_r(&t, &buffer);
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#endif
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if (tm == nullptr)
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throw std::runtime_error("localtime_r() failed");
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return *tm;
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}
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std::chrono::system_clock::time_point
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TimeGm(struct tm &tm) noexcept
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{
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#ifdef __GLIBC__
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/* timegm() is a GNU extension */
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const auto t = timegm(&tm);
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#else
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tm.tm_isdst = 0;
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const auto t = mktime(&tm) + GetTimeZoneOffset();
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#endif /* !__GLIBC__ */
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return std::chrono::system_clock::from_time_t(t);
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}
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std::chrono::system_clock::time_point
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MakeTime(struct tm &tm) noexcept
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{
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return std::chrono::system_clock::from_time_t(mktime(&tm));
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}
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std::chrono::steady_clock::duration
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ToSteadyClockDuration(const struct timeval &tv) noexcept
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{
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return std::chrono::steady_clock::duration(std::chrono::seconds(tv.tv_sec)) +
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std::chrono::steady_clock::duration(std::chrono::microseconds(tv.tv_usec));
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}
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