LeapSeconds.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
 */
#include <duds/time/planetary/LeapBounds.hpp>
#include <duds/general/Spinlock.hpp>
#include <memory>
#include <map>

namespace duds { namespace time { namespace planetary {

using std::shared_ptr;

class LeapSeconds {
public:
    typedef std::map<
        duds::time::interstellar::SecondTime,
        duds::time::interstellar::Seconds
    >  LeapMap;
private:
    shared_ptr<LeapMap> leaps;
    duds::time::interstellar::Seconds currUntil;
    mutable duds::general::Spinlock block;
public:
    LeapSeconds();
    LeapSeconds(const std::string &zoneinfo);
    int readZoneinfo(const std::string &zoneinfo);
    void setCurrent(const duds::time::interstellar::Seconds when);
    duds::time::interstellar::Seconds currentUntil() const;
    void add(const duds::time::interstellar::SecondTime leapOn,
        const duds::time::interstellar::Seconds additional =
        duds::time::interstellar::Seconds(1)
    );
    void set(const duds::time::interstellar::SecondTime leapOn,
        const duds::time::interstellar::Seconds total
    );
    duds::time::interstellar::Seconds leapSeconds(
        const duds::time::interstellar::SecondTime &when
    ) const;
    /*
     * Returns the sum of all leap seconds in use at the given time.
     * @param when  The time to inspect for leap seconds.
     * /
    template <class ISTime>
    typename ISTime::duration leapSeconds(const ISTime &when) const {
        return std::chrono::duration_cast<typename ISTime::duration>(leapSeconds(
            duds::time::interstellar::SecondTime(
                std::chrono::duration_cast<duds::time::interstellar::Seconds>(
                    when.time_since_epoch()
                )
            )
        ));
    } */
    /*
    template <class ISTime>
    LeapBounds getLeapBounds(const ISTime &time) const {
        return getLeapBounds(
    }
    */
    LeapBounds<> getLeapBounds(
        const duds::time::interstellar::SecondTime time
    ) const;
    shared_ptr<const LeapMap> leapMap() const;
    LeapMap leapMapCopy() const;
};

} } }