mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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112 lines
4.4 KiB
C++
112 lines
4.4 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2014 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_CTIME_TO_TIME_T_HPP
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#define SPROUT_CTIME_TO_TIME_T_HPP
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#include <ctime>
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#include <sprout/config.hpp>
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#include <sprout/ctype/ascii.hpp>
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#include <sprout/algorithm/equal.hpp>
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#include <sprout/iterator/ptr_index_iterator.hpp>
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#include <sprout/detail/char_conversion.hpp>
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namespace sprout {
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namespace detail {
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inline SPROUT_CONSTEXPR std::time_t
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to_time_t_impl(int year, int mon, int day, int hour, int min, int sec) {
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return (((
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std::time_t(year / 4 - year / 100 + year / 400 + 367 * mon / 12 + day) + year * 365 - 719499
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) * 24 + hour
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) * 60 + min
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) * 60 + sec
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;
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}
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} // namespace detail
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//
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// to_time_t
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//
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inline SPROUT_CONSTEXPR std::time_t
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to_time_t(int year, int mon, int day, int hour, int min, int sec) {
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return mon <= 2
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? sprout::detail::to_time_t_impl(year - 1, mon + 10, day, hour, min, sec)
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: sprout::detail::to_time_t_impl(year, mon - 2, day, hour, min, sec)
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;
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}
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inline SPROUT_CONSTEXPR std::time_t
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to_time_t(std::tm const& t) {
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return sprout::to_time_t(t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, t.tm_hour, t.tm_min, t.tm_sec);
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}
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namespace detail {
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template<typename Elem>
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inline SPROUT_CONSTEXPR int
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get_num(Elem c) {
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return !sprout::isdigit(c) ? 0
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: sprout::detail::char_to_int(c)
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;
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}
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template<typename InputIterator>
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inline SPROUT_CONSTEXPR int
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get_month(InputIterator const& date) {
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return sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Jan")) ? 1
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: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Feb")) ? 2
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: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Mar")) ? 3
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: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Apr")) ? 4
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: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("May")) ? 5
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: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Jun")) ? 6
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: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Jul")) ? 7
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: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Aug")) ? 8
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: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Sep")) ? 9
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: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Oct")) ? 10
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: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Nov")) ? 11
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: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Dec")) ? 12
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: 0
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;
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}
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template<typename RandomAccessIterator>
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inline SPROUT_CONSTEXPR int
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get_day(RandomAccessIterator const& date) {
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return sprout::detail::get_num(date[0]) * 10
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+ sprout::detail::get_num(date[1])
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;
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}
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template<typename RandomAccessIterator>
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inline SPROUT_CONSTEXPR int
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get_year(RandomAccessIterator const& date) {
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return sprout::detail::get_num(date[0]) * 1000
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+ sprout::detail::get_num(date[1]) * 100
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+ sprout::detail::get_num(date[2]) * 10
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+ sprout::detail::get_num(date[3])
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;
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}
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template<typename RandomAccessIterator>
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inline SPROUT_CONSTEXPR int
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get_time(RandomAccessIterator const& time) {
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return sprout::detail::get_num(time[0]) * 10
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+ sprout::detail::get_num(time[1])
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;
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}
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} // namespace detail
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//
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// to_time_t
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//
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template<typename RandomAccessIterator1, typename RandomAccessIterator2>
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inline SPROUT_CONSTEXPR std::time_t
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to_time_t(RandomAccessIterator1 const& date, RandomAccessIterator2 const& time) {
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return sprout::to_time_t(
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sprout::detail::get_year(date + 7),
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sprout::detail::get_month(date + 0),
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sprout::detail::get_day(date + 4),
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sprout::detail::get_time(time + 0),
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sprout::detail::get_time(time + 3),
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sprout::detail::get_time(time + 6)
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);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_CTIME_TO_TIME_T_HPP
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