Planetary.hpp

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/*
 * This file is part of the DUDS project. It is subject to the BSD-style
 * license terms in the LICENSE file found in the top-level directory of this
 * distribution and at https://github.com/jjackowski/duds/blob/master/LICENSE.
 * No part of DUDS, including this file, may be copied, modified, propagated,
 * or distributed except according to the terms contained in the LICENSE file.
 *
 * Copyright (C) 2017  Jeff Jackowski
 */
#ifndef PLANETARY_HPP
#define PLANETARY_HPP

#include <duds/time/planetary/LeapSeconds.hpp>
#include <boost/date_time/gregorian/gregorian.hpp>
#include <duds/data/GenericValue.hpp>

namespace duds {

namespace time {

namespace planetary {

using std::unique_ptr;
/*
class PlanetaryTime {
    LeapSeconds leaps;
    int days;
};
*/

// move to earth.hpp
class Earth {
    LeapBounds<> bound;
public:
    Earth();
    LeapSeconds leaps;
    static const boost::gregorian::date &dateZero();
    static const boost::posix_time::ptime &timeZero();
    static void make(const std::string &path = "/usr/share/zoneinfo-leaps/UTC");
    typedef duds::time::interstellar::Femtoseconds duration;
    typedef duration::rep rep;
    typedef duration::period period;
    typedef std::chrono::time_point<Earth, duration> time_point;
    static constexpr bool is_steady = false;
    time_point now() noexcept {
        // wrong
        return time_point(std::chrono::duration_cast<duration, rep, period>(
            std::chrono::system_clock::now().time_since_epoch()));
    }
    boost::gregorian::date date(
        const duds::time::interstellar::SecondTime &t
    ) const;
    template <class ISTime>
    boost::gregorian::date date(const ISTime &t) const {
        return date(interstellar::SecondTime(
            std::chrono::duration_cast<interstellar::Seconds>(
                t.time_since_epoch()
            )
        ));
    }
    std::time_t timeUtc(
        const duds::time::interstellar::SecondTime &t
    ) const;
    template <class ISTime>
    std::time_t timeUtc(const ISTime &t) const {
        return timeUtc(interstellar::SecondTime(
            std::chrono::duration_cast<interstellar::Seconds>(
                t.time_since_epoch()
            )
        ));
    }

    boost::gregorian::date dateUtcToTai(
        const duds::time::interstellar::SecondTime &t
        ) const;
    template <class ISTime>
    boost::gregorian::date dateUtcToTai(const ISTime &t) const {
        return dateUtcToTai(interstellar::SecondTime(
            std::chrono::duration_cast<interstellar::Seconds>(
                t.time_since_epoch()
            )
        ));
    }
    boost::posix_time::ptime posix(
        const duds::time::interstellar::MilliTime &t
    ) const;
    template <class ISTime>
    boost::posix_time::ptime posix(const ISTime &t) const {
        return posix(duds::time::interstellar::MilliTime(
            std::chrono::duration_cast<duds::time::interstellar::Milliseconds>(
                t.time_since_epoch()
            )
        ));
    }
    boost::posix_time::ptime posixUtcToTai(
        const duds::time::interstellar::MilliTime &t
    ) const;
    template <class ISTime>
    boost::posix_time::ptime posixUtcToTai(const ISTime &t) const {
        return posixUtcToTai(duds::time::interstellar::MilliTime(
            std::chrono::duration_cast<duds::time::interstellar::Milliseconds>(
                t.time_since_epoch()
            )
        ));
    }
    // UTC

    template <class Clock, class Duration>
    void addLeapSeconds(
        duds::time::interstellar::TimePoint<Clock, Duration> &time
    ) {
        //duds::time::interstellar::SecondTime comp = time;
        if (!bound.within(time)) {
            bound = leaps.getLeapBounds(time);
        }
        assert(bound.within(time));
        time += bound.leaps;
    }

    template <class ISTime>
    void date(ISTime &dest, const boost::gregorian::date &src) {
        dest = duds::time::interstellar::SecondTime(
            duds::time::interstellar::Seconds((src - dateZero()).days() * 86400)
        );
        duds::time::interstellar::Seconds ls = leaps.leapSeconds(dest);
        dest += ls;
    }
    template <class ISTime>
    void time(ISTime &dest, const boost::posix_time::ptime &src) {
        dest = duds::time::interstellar::MilliTime(
            duds::time::interstellar::Milliseconds(
                (src - timeZero()).total_milliseconds()
            )
        );
        duds::time::interstellar::Seconds ls = leaps.leapSeconds(dest);
        dest += ls;
    }
};

extern unique_ptr<Earth> earth;

template <class ISTime>
inline boost::gregorian::date ToDate(const ISTime &t) {
    return Earth::dateZero() + boost::gregorian::days(
        std::chrono::duration_cast<duds::time::interstellar::Seconds>(
            t.time_since_epoch()
        ).count()
    );
}

template <class ISTime>
inline boost::posix_time::ptime ToPosix(const ISTime &t) {
    return Earth::timeZero() + boost::posix_time::milliseconds(
        std::chrono::duration_cast<duds::time::interstellar::Milliseconds>(
            t.time_since_epoch()
        ).count()
    );
}

} } }

#endif        //  #ifndef PLANETARY_HPP