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632 lines
22 KiB
C++
632 lines
22 KiB
C++
// Copyright Toru Niina 2017.
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// Distributed under the MIT License.
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#ifndef TOML11_DATETIME_HPP
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#define TOML11_DATETIME_HPP
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#include <cstdint>
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#include <cstdlib>
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#include <ctime>
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#include <array>
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#include <chrono>
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#include <iomanip>
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#include <ostream>
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#include <tuple>
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namespace toml
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{
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// To avoid non-threadsafe std::localtime. In C11 (not C++11!), localtime_s is
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// provided in the absolutely same purpose, but C++11 is actually not compatible
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// with C11. We need to dispatch the function depending on the OS.
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namespace detail
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{
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// TODO: find more sophisticated way to handle this
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#if defined(_MSC_VER)
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inline std::tm localtime_s(const std::time_t* src)
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{
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std::tm dst;
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const auto result = ::localtime_s(&dst, src);
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if (result) { throw std::runtime_error("localtime_s failed."); }
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return dst;
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}
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inline std::tm gmtime_s(const std::time_t* src)
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{
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std::tm dst;
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const auto result = ::gmtime_s(&dst, src);
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if (result) { throw std::runtime_error("gmtime_s failed."); }
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return dst;
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}
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#elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 1) || defined(_XOPEN_SOURCE) || defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || defined(_POSIX_SOURCE)
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inline std::tm localtime_s(const std::time_t* src)
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{
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std::tm dst;
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const auto result = ::localtime_r(src, &dst);
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if (!result) { throw std::runtime_error("localtime_r failed."); }
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return dst;
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}
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inline std::tm gmtime_s(const std::time_t* src)
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{
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std::tm dst;
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const auto result = ::gmtime_r(src, &dst);
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if (!result) { throw std::runtime_error("gmtime_r failed."); }
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return dst;
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}
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#else // fallback. not threadsafe
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inline std::tm localtime_s(const std::time_t* src)
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{
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const auto result = std::localtime(src);
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if (!result) { throw std::runtime_error("localtime failed."); }
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return *result;
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}
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inline std::tm gmtime_s(const std::time_t* src)
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{
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const auto result = std::gmtime(src);
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if (!result) { throw std::runtime_error("gmtime failed."); }
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return *result;
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}
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#endif
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} // detail
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enum class month_t : std::uint8_t
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{
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Jan = 0,
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Feb = 1,
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Mar = 2,
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Apr = 3,
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May = 4,
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Jun = 5,
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Jul = 6,
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Aug = 7,
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Sep = 8,
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Oct = 9,
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Nov = 10,
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Dec = 11
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};
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struct local_date
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{
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std::int16_t year{}; // A.D. (like, 2018)
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std::uint8_t month{}; // [0, 11]
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std::uint8_t day{}; // [1, 31]
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local_date(int y, month_t m, int d)
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: year (static_cast<std::int16_t>(y)),
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month(static_cast<std::uint8_t>(m)),
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day (static_cast<std::uint8_t>(d))
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{}
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explicit local_date(const std::tm& t)
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: year (static_cast<std::int16_t>(t.tm_year + 1900)),
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month(static_cast<std::uint8_t>(t.tm_mon)),
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day (static_cast<std::uint8_t>(t.tm_mday))
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{}
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explicit local_date(const std::chrono::system_clock::time_point& tp)
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{
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const auto t = std::chrono::system_clock::to_time_t(tp);
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const auto time = detail::localtime_s(&t);
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*this = local_date(time);
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}
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explicit local_date(const std::time_t t)
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: local_date(std::chrono::system_clock::from_time_t(t))
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{}
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operator std::chrono::system_clock::time_point() const
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{
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// std::mktime returns date as local time zone. no conversion needed
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std::tm t;
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t.tm_sec = 0;
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t.tm_min = 0;
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t.tm_hour = 0;
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t.tm_mday = static_cast<int>(this->day);
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t.tm_mon = static_cast<int>(this->month);
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t.tm_year = static_cast<int>(this->year) - 1900;
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t.tm_wday = 0; // the value will be ignored
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t.tm_yday = 0; // the value will be ignored
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t.tm_isdst = -1;
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return std::chrono::system_clock::from_time_t(std::mktime(&t));
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}
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operator std::time_t() const
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{
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return std::chrono::system_clock::to_time_t(
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std::chrono::system_clock::time_point(*this));
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}
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local_date() = default;
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~local_date() = default;
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local_date(local_date const&) = default;
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local_date(local_date&&) = default;
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local_date& operator=(local_date const&) = default;
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local_date& operator=(local_date&&) = default;
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};
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inline bool operator==(const local_date& lhs, const local_date& rhs)
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{
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return std::make_tuple(lhs.year, lhs.month, lhs.day) ==
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std::make_tuple(rhs.year, rhs.month, rhs.day);
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}
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inline bool operator!=(const local_date& lhs, const local_date& rhs)
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{
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return !(lhs == rhs);
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}
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inline bool operator< (const local_date& lhs, const local_date& rhs)
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{
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return std::make_tuple(lhs.year, lhs.month, lhs.day) <
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std::make_tuple(rhs.year, rhs.month, rhs.day);
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}
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inline bool operator<=(const local_date& lhs, const local_date& rhs)
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{
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return (lhs < rhs) || (lhs == rhs);
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}
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inline bool operator> (const local_date& lhs, const local_date& rhs)
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{
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return !(lhs <= rhs);
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}
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inline bool operator>=(const local_date& lhs, const local_date& rhs)
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{
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return !(lhs < rhs);
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}
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template<typename charT, typename traits>
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os, const local_date& date)
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{
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os << std::setfill('0') << std::setw(4) << static_cast<int>(date.year ) << '-';
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os << std::setfill('0') << std::setw(2) << static_cast<int>(date.month) + 1 << '-';
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os << std::setfill('0') << std::setw(2) << static_cast<int>(date.day ) ;
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return os;
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}
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struct local_time
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{
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std::uint8_t hour{}; // [0, 23]
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std::uint8_t minute{}; // [0, 59]
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std::uint8_t second{}; // [0, 60]
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std::uint16_t millisecond{}; // [0, 999]
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std::uint16_t microsecond{}; // [0, 999]
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std::uint16_t nanosecond{}; // [0, 999]
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local_time(int h, int m, int s,
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int ms = 0, int us = 0, int ns = 0)
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: hour (static_cast<std::uint8_t>(h)),
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minute(static_cast<std::uint8_t>(m)),
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second(static_cast<std::uint8_t>(s)),
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millisecond(static_cast<std::uint16_t>(ms)),
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microsecond(static_cast<std::uint16_t>(us)),
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nanosecond (static_cast<std::uint16_t>(ns))
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{}
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explicit local_time(const std::tm& t)
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: hour (static_cast<std::uint8_t>(t.tm_hour)),
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minute(static_cast<std::uint8_t>(t.tm_min)),
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second(static_cast<std::uint8_t>(t.tm_sec)),
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millisecond(0), microsecond(0), nanosecond(0)
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{}
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template<typename Rep, typename Period>
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explicit local_time(const std::chrono::duration<Rep, Period>& t)
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{
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const auto h = std::chrono::duration_cast<std::chrono::hours>(t);
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this->hour = static_cast<std::uint8_t>(h.count());
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const auto t2 = t - h;
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const auto m = std::chrono::duration_cast<std::chrono::minutes>(t2);
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this->minute = static_cast<std::uint8_t>(m.count());
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const auto t3 = t2 - m;
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const auto s = std::chrono::duration_cast<std::chrono::seconds>(t3);
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this->second = static_cast<std::uint8_t>(s.count());
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const auto t4 = t3 - s;
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const auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(t4);
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this->millisecond = static_cast<std::uint16_t>(ms.count());
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const auto t5 = t4 - ms;
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const auto us = std::chrono::duration_cast<std::chrono::microseconds>(t5);
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this->microsecond = static_cast<std::uint16_t>(us.count());
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const auto t6 = t5 - us;
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const auto ns = std::chrono::duration_cast<std::chrono::nanoseconds>(t6);
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this->nanosecond = static_cast<std::uint16_t>(ns.count());
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}
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operator std::chrono::nanoseconds() const
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{
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return std::chrono::nanoseconds (this->nanosecond) +
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std::chrono::microseconds(this->microsecond) +
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std::chrono::milliseconds(this->millisecond) +
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std::chrono::seconds(this->second) +
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std::chrono::minutes(this->minute) +
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std::chrono::hours(this->hour);
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}
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local_time() = default;
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~local_time() = default;
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local_time(local_time const&) = default;
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local_time(local_time&&) = default;
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local_time& operator=(local_time const&) = default;
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local_time& operator=(local_time&&) = default;
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};
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inline bool operator==(const local_time& lhs, const local_time& rhs)
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{
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return std::make_tuple(lhs.hour, lhs.minute, lhs.second, lhs.millisecond, lhs.microsecond, lhs.nanosecond) ==
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std::make_tuple(rhs.hour, rhs.minute, rhs.second, rhs.millisecond, rhs.microsecond, rhs.nanosecond);
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}
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inline bool operator!=(const local_time& lhs, const local_time& rhs)
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{
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return !(lhs == rhs);
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}
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inline bool operator< (const local_time& lhs, const local_time& rhs)
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{
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return std::make_tuple(lhs.hour, lhs.minute, lhs.second, lhs.millisecond, lhs.microsecond, lhs.nanosecond) <
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std::make_tuple(rhs.hour, rhs.minute, rhs.second, rhs.millisecond, rhs.microsecond, rhs.nanosecond);
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}
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inline bool operator<=(const local_time& lhs, const local_time& rhs)
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{
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return (lhs < rhs) || (lhs == rhs);
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}
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inline bool operator> (const local_time& lhs, const local_time& rhs)
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{
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return !(lhs <= rhs);
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}
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inline bool operator>=(const local_time& lhs, const local_time& rhs)
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{
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return !(lhs < rhs);
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}
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template<typename charT, typename traits>
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os, const local_time& time)
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{
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os << std::setfill('0') << std::setw(2) << static_cast<int>(time.hour ) << ':';
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os << std::setfill('0') << std::setw(2) << static_cast<int>(time.minute) << ':';
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os << std::setfill('0') << std::setw(2) << static_cast<int>(time.second);
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if(time.millisecond != 0 || time.microsecond != 0 || time.nanosecond != 0)
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{
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os << '.';
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os << std::setfill('0') << std::setw(3) << static_cast<int>(time.millisecond);
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if(time.microsecond != 0 || time.nanosecond != 0)
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{
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os << std::setfill('0') << std::setw(3) << static_cast<int>(time.microsecond);
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if(time.nanosecond != 0)
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{
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os << std::setfill('0') << std::setw(3) << static_cast<int>(time.nanosecond);
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}
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}
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}
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return os;
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}
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struct time_offset
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{
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std::int8_t hour{}; // [-12, 12]
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std::int8_t minute{}; // [-59, 59]
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time_offset(int h, int m)
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: hour (static_cast<std::int8_t>(h)),
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minute(static_cast<std::int8_t>(m))
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{}
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operator std::chrono::minutes() const
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{
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return std::chrono::minutes(this->minute) +
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std::chrono::hours(this->hour);
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}
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time_offset() = default;
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~time_offset() = default;
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time_offset(time_offset const&) = default;
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time_offset(time_offset&&) = default;
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time_offset& operator=(time_offset const&) = default;
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time_offset& operator=(time_offset&&) = default;
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};
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inline bool operator==(const time_offset& lhs, const time_offset& rhs)
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{
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return std::make_tuple(lhs.hour, lhs.minute) ==
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std::make_tuple(rhs.hour, rhs.minute);
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}
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inline bool operator!=(const time_offset& lhs, const time_offset& rhs)
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{
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return !(lhs == rhs);
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}
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inline bool operator< (const time_offset& lhs, const time_offset& rhs)
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{
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return std::make_tuple(lhs.hour, lhs.minute) <
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std::make_tuple(rhs.hour, rhs.minute);
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}
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inline bool operator<=(const time_offset& lhs, const time_offset& rhs)
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{
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return (lhs < rhs) || (lhs == rhs);
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}
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inline bool operator> (const time_offset& lhs, const time_offset& rhs)
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{
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return !(lhs <= rhs);
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}
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inline bool operator>=(const time_offset& lhs, const time_offset& rhs)
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{
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return !(lhs < rhs);
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}
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template<typename charT, typename traits>
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os, const time_offset& offset)
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{
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if(offset.hour == 0 && offset.minute == 0)
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{
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os << 'Z';
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return os;
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}
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int minute = static_cast<int>(offset.hour) * 60 + offset.minute;
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if(minute < 0){os << '-'; minute = std::abs(minute);} else {os << '+';}
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os << std::setfill('0') << std::setw(2) << minute / 60 << ':';
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os << std::setfill('0') << std::setw(2) << minute % 60;
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return os;
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}
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struct local_datetime
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{
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local_date date{};
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local_time time{};
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local_datetime(local_date d, local_time t): date(d), time(t) {}
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explicit local_datetime(const std::tm& t): date(t), time(t){}
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explicit local_datetime(const std::chrono::system_clock::time_point& tp)
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{
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const auto t = std::chrono::system_clock::to_time_t(tp);
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std::tm ltime = detail::localtime_s(&t);
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this->date = local_date(ltime);
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this->time = local_time(ltime);
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// std::tm lacks subsecond information, so diff between tp and tm
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// can be used to get millisecond & microsecond information.
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const auto t_diff = tp -
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std::chrono::system_clock::from_time_t(std::mktime(<ime));
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this->time.millisecond = static_cast<std::uint16_t>(
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std::chrono::duration_cast<std::chrono::milliseconds>(t_diff).count());
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this->time.microsecond = static_cast<std::uint16_t>(
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std::chrono::duration_cast<std::chrono::microseconds>(t_diff).count());
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this->time.nanosecond = static_cast<std::uint16_t>(
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std::chrono::duration_cast<std::chrono::nanoseconds >(t_diff).count());
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}
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explicit local_datetime(const std::time_t t)
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: local_datetime(std::chrono::system_clock::from_time_t(t))
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{}
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operator std::chrono::system_clock::time_point() const
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{
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using internal_duration =
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typename std::chrono::system_clock::time_point::duration;
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// Normally DST begins at A.M. 3 or 4. If we re-use conversion operator
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// of local_date and local_time independently, the conversion fails if
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// it is the day when DST begins or ends. Since local_date considers the
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// time is 00:00 A.M. and local_time does not consider DST because it
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// does not have any date information. We need to consider both date and
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// time information at the same time to convert it correctly.
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std::tm t;
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t.tm_sec = static_cast<int>(this->time.second);
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t.tm_min = static_cast<int>(this->time.minute);
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t.tm_hour = static_cast<int>(this->time.hour);
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t.tm_mday = static_cast<int>(this->date.day);
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t.tm_mon = static_cast<int>(this->date.month);
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t.tm_year = static_cast<int>(this->date.year) - 1900;
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t.tm_wday = 0; // the value will be ignored
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t.tm_yday = 0; // the value will be ignored
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t.tm_isdst = -1;
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// std::mktime returns date as local time zone. no conversion needed
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auto dt = std::chrono::system_clock::from_time_t(std::mktime(&t));
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dt += std::chrono::duration_cast<internal_duration>(
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std::chrono::milliseconds(this->time.millisecond) +
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std::chrono::microseconds(this->time.microsecond) +
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std::chrono::nanoseconds (this->time.nanosecond));
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return dt;
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}
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operator std::time_t() const
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{
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return std::chrono::system_clock::to_time_t(
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std::chrono::system_clock::time_point(*this));
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}
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local_datetime() = default;
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~local_datetime() = default;
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local_datetime(local_datetime const&) = default;
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local_datetime(local_datetime&&) = default;
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local_datetime& operator=(local_datetime const&) = default;
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local_datetime& operator=(local_datetime&&) = default;
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};
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inline bool operator==(const local_datetime& lhs, const local_datetime& rhs)
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{
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|
return std::make_tuple(lhs.date, lhs.time) ==
|
|
std::make_tuple(rhs.date, rhs.time);
|
|
}
|
|
inline bool operator!=(const local_datetime& lhs, const local_datetime& rhs)
|
|
{
|
|
return !(lhs == rhs);
|
|
}
|
|
inline bool operator< (const local_datetime& lhs, const local_datetime& rhs)
|
|
{
|
|
return std::make_tuple(lhs.date, lhs.time) <
|
|
std::make_tuple(rhs.date, rhs.time);
|
|
}
|
|
inline bool operator<=(const local_datetime& lhs, const local_datetime& rhs)
|
|
{
|
|
return (lhs < rhs) || (lhs == rhs);
|
|
}
|
|
inline bool operator> (const local_datetime& lhs, const local_datetime& rhs)
|
|
{
|
|
return !(lhs <= rhs);
|
|
}
|
|
inline bool operator>=(const local_datetime& lhs, const local_datetime& rhs)
|
|
{
|
|
return !(lhs < rhs);
|
|
}
|
|
|
|
template<typename charT, typename traits>
|
|
std::basic_ostream<charT, traits>&
|
|
operator<<(std::basic_ostream<charT, traits>& os, const local_datetime& dt)
|
|
{
|
|
os << dt.date << 'T' << dt.time;
|
|
return os;
|
|
}
|
|
|
|
struct offset_datetime
|
|
{
|
|
local_date date{};
|
|
local_time time{};
|
|
time_offset offset{};
|
|
|
|
offset_datetime(local_date d, local_time t, time_offset o)
|
|
: date(d), time(t), offset(o)
|
|
{}
|
|
offset_datetime(const local_datetime& dt, time_offset o)
|
|
: date(dt.date), time(dt.time), offset(o)
|
|
{}
|
|
explicit offset_datetime(const local_datetime& ld)
|
|
: date(ld.date), time(ld.time), offset(get_local_offset(nullptr))
|
|
// use the current local timezone offset
|
|
{}
|
|
explicit offset_datetime(const std::chrono::system_clock::time_point& tp)
|
|
: offset(0, 0) // use gmtime
|
|
{
|
|
const auto timet = std::chrono::system_clock::to_time_t(tp);
|
|
const auto tm = detail::gmtime_s(&timet);
|
|
this->date = local_date(tm);
|
|
this->time = local_time(tm);
|
|
}
|
|
explicit offset_datetime(const std::time_t& t)
|
|
: offset(0, 0) // use gmtime
|
|
{
|
|
const auto tm = detail::gmtime_s(&t);
|
|
this->date = local_date(tm);
|
|
this->time = local_time(tm);
|
|
}
|
|
explicit offset_datetime(const std::tm& t)
|
|
: offset(0, 0) // assume gmtime
|
|
{
|
|
this->date = local_date(t);
|
|
this->time = local_time(t);
|
|
}
|
|
|
|
operator std::chrono::system_clock::time_point() const
|
|
{
|
|
// get date-time
|
|
using internal_duration =
|
|
typename std::chrono::system_clock::time_point::duration;
|
|
|
|
// first, convert it to local date-time information in the same way as
|
|
// local_datetime does. later we will use time_t to adjust time offset.
|
|
std::tm t;
|
|
t.tm_sec = static_cast<int>(this->time.second);
|
|
t.tm_min = static_cast<int>(this->time.minute);
|
|
t.tm_hour = static_cast<int>(this->time.hour);
|
|
t.tm_mday = static_cast<int>(this->date.day);
|
|
t.tm_mon = static_cast<int>(this->date.month);
|
|
t.tm_year = static_cast<int>(this->date.year) - 1900;
|
|
t.tm_wday = 0; // the value will be ignored
|
|
t.tm_yday = 0; // the value will be ignored
|
|
t.tm_isdst = -1;
|
|
const std::time_t tp_loc = std::mktime(std::addressof(t));
|
|
|
|
auto tp = std::chrono::system_clock::from_time_t(tp_loc);
|
|
tp += std::chrono::duration_cast<internal_duration>(
|
|
std::chrono::milliseconds(this->time.millisecond) +
|
|
std::chrono::microseconds(this->time.microsecond) +
|
|
std::chrono::nanoseconds (this->time.nanosecond));
|
|
|
|
// Since mktime uses local time zone, it should be corrected.
|
|
// `12:00:00+09:00` means `03:00:00Z`. So mktime returns `03:00:00Z` if
|
|
// we are in `+09:00` timezone. To represent `12:00:00Z` there, we need
|
|
// to add `+09:00` to `03:00:00Z`.
|
|
// Here, it uses the time_t converted from date-time info to handle
|
|
// daylight saving time.
|
|
const auto ofs = get_local_offset(std::addressof(tp_loc));
|
|
tp += std::chrono::hours (ofs.hour);
|
|
tp += std::chrono::minutes(ofs.minute);
|
|
|
|
// We got `12:00:00Z` by correcting local timezone applied by mktime.
|
|
// Then we will apply the offset. Let's say `12:00:00-08:00` is given.
|
|
// And now, we have `12:00:00Z`. `12:00:00-08:00` means `20:00:00Z`.
|
|
// So we need to subtract the offset.
|
|
tp -= std::chrono::minutes(this->offset);
|
|
return tp;
|
|
}
|
|
|
|
operator std::time_t() const
|
|
{
|
|
return std::chrono::system_clock::to_time_t(
|
|
std::chrono::system_clock::time_point(*this));
|
|
}
|
|
|
|
offset_datetime() = default;
|
|
~offset_datetime() = default;
|
|
offset_datetime(offset_datetime const&) = default;
|
|
offset_datetime(offset_datetime&&) = default;
|
|
offset_datetime& operator=(offset_datetime const&) = default;
|
|
offset_datetime& operator=(offset_datetime&&) = default;
|
|
|
|
private:
|
|
|
|
static time_offset get_local_offset(const std::time_t* tp)
|
|
{
|
|
// get local timezone with the same date-time information as mktime
|
|
const auto t = detail::localtime_s(tp);
|
|
|
|
std::array<char, 6> buf;
|
|
const auto result = std::strftime(buf.data(), 6, "%z", &t); // +hhmm\0
|
|
if(result != 5)
|
|
{
|
|
throw std::runtime_error("toml::offset_datetime: cannot obtain "
|
|
"timezone information of current env");
|
|
}
|
|
const int ofs = std::atoi(buf.data());
|
|
const int ofs_h = ofs / 100;
|
|
const int ofs_m = ofs - (ofs_h * 100);
|
|
return time_offset(ofs_h, ofs_m);
|
|
}
|
|
};
|
|
|
|
inline bool operator==(const offset_datetime& lhs, const offset_datetime& rhs)
|
|
{
|
|
return std::make_tuple(lhs.date, lhs.time, lhs.offset) ==
|
|
std::make_tuple(rhs.date, rhs.time, rhs.offset);
|
|
}
|
|
inline bool operator!=(const offset_datetime& lhs, const offset_datetime& rhs)
|
|
{
|
|
return !(lhs == rhs);
|
|
}
|
|
inline bool operator< (const offset_datetime& lhs, const offset_datetime& rhs)
|
|
{
|
|
return std::make_tuple(lhs.date, lhs.time, lhs.offset) <
|
|
std::make_tuple(rhs.date, rhs.time, rhs.offset);
|
|
}
|
|
inline bool operator<=(const offset_datetime& lhs, const offset_datetime& rhs)
|
|
{
|
|
return (lhs < rhs) || (lhs == rhs);
|
|
}
|
|
inline bool operator> (const offset_datetime& lhs, const offset_datetime& rhs)
|
|
{
|
|
return !(lhs <= rhs);
|
|
}
|
|
inline bool operator>=(const offset_datetime& lhs, const offset_datetime& rhs)
|
|
{
|
|
return !(lhs < rhs);
|
|
}
|
|
|
|
template<typename charT, typename traits>
|
|
std::basic_ostream<charT, traits>&
|
|
operator<<(std::basic_ostream<charT, traits>& os, const offset_datetime& dt)
|
|
{
|
|
os << dt.date << 'T' << dt.time << dt.offset;
|
|
return os;
|
|
}
|
|
|
|
}//toml
|
|
#endif// TOML11_DATETIME
|