74 lines
1.6 KiB
C++
74 lines
1.6 KiB
C++
// SPDX-License-Identifier: BSD-2-Clause
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// Copyright CM4all GmbH
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// author: Max Kellermann <mk@cm4all.com>
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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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