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add packer [n4144]

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bolero-MURAKAMI 2014-10-22 10:04:41 +09:00
parent bba5813733
commit ff3a85cf55
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sprout/ctime/to_time_t.hpp Normal file
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/*=============================================================================
Copyright (c) 2011-2014 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/
#ifndef SPROUT_CTIME_TO_TIME_T_HPP
#define SPROUT_CTIME_TO_TIME_T_HPP
#include <ctime>
#include <sprout/config.hpp>
#include <sprout/ctype/ascii.hpp>
#include <sprout/algorithm/equal.hpp>
#include <sprout/iterator/ptr_index_iterator.hpp>
namespace sprout {
namespace detail {
inline SPROUT_CONSTEXPR std::time_t
to_time_t_impl(int year, int mon, int day, int hour, int min, int sec) {
return (((
std::time_t(year / 4 - year / 100 + year / 400 + 367 * mon / 12 + day) + year * 365 - 719499
) * 24 + hour
) * 60 + min
) * 60 + sec
;
}
} // namespace detail
//
// to_time_t
//
inline SPROUT_CONSTEXPR std::time_t
to_time_t(int year, int mon, int day, int hour, int min, int sec) {
return mon <= 2
? sprout::detail::to_time_t_impl(year - 1, mon + 10, day, hour, min, sec)
: sprout::detail::to_time_t_impl(year, mon - 2, day, hour, min, sec)
;
}
inline SPROUT_CONSTEXPR std::time_t
to_time_t(std::tm const& t) {
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);
}
namespace detail {
template<typename Elem>
inline SPROUT_CONSTEXPR int
get_num(Elem e) {
return !sprout::isdigit(e) ? 0
: e - static_cast<Elem>('0')
;
}
template<typename InputIterator>
inline SPROUT_CONSTEXPR int
get_month(InputIterator const& date) {
return sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Jan")) ? 1
: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Feb")) ? 2
: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Mar")) ? 3
: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Apr")) ? 4
: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("May")) ? 5
: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Jun")) ? 6
: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Jul")) ? 7
: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Aug")) ? 8
: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Sep")) ? 9
: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Oct")) ? 10
: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Nov")) ? 11
: sprout::equal(sprout::ptr_index(date), sprout::ptr_index(date, 3), sprout::ptr_index("Dec")) ? 12
: 0
;
}
template<typename RandomAccessIterator>
inline SPROUT_CONSTEXPR int
get_day(RandomAccessIterator const& date) {
return sprout::detail::get_num(date[0]) * 10
+ sprout::detail::get_num(date[1])
;
}
template<typename RandomAccessIterator>
inline SPROUT_CONSTEXPR int
get_year(RandomAccessIterator const& date) {
return sprout::detail::get_num(date[0]) * 1000
+ sprout::detail::get_num(date[1]) * 100
+ sprout::detail::get_num(date[2]) * 10
+ sprout::detail::get_num(date[3])
;
}
template<typename RandomAccessIterator>
inline SPROUT_CONSTEXPR int
get_time(RandomAccessIterator const& time) {
return sprout::detail::get_num(time[0]) * 10
+ sprout::detail::get_num(time[1])
;
}
} // namespace detail
//
// to_time_t
//
template<typename RandomAccessIterator1, typename RandomAccessIterator2>
inline SPROUT_CONSTEXPR std::time_t
to_time_t(RandomAccessIterator1 const& date, RandomAccessIterator2 const& time) {
return sprout::to_time_t(
sprout::detail::get_year(date + 7),
sprout::detail::get_month(date + 0),
sprout::detail::get_day(date + 4),
sprout::detail::get_time(time + 0),
sprout::detail::get_time(time + 3),
sprout::detail::get_time(time + 6)
);
}
} // namespace sprout
#endif // #ifndef SPROUT_CTIME_TO_TIME_T_HPP