LeapSeconds.h

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#ifndef _utl_LeapSeconds_h_
#define _utl_LeapSeconds_h_

#include <string>
#include <map>
#include <ctime>
#include <utl/Singleton.h>


namespace utl {

  class LeapSeconds : public Singleton<LeapSeconds> {
  private:
    // pair contains leap and accumulated leaps
    typedef std::map<unsigned long, std::pair<int, int> > GPSToUnixMap;
    typedef GPSToUnixMap::const_iterator GPSToUnixIterator;

    typedef std::map<std::time_t, long> UnixToGPSMap;
    typedef UnixToGPSMap::const_iterator UnixToGPSIterator;

  public:
    LeapSeconds() : fTZ(0) { Init(); SetUTC(); }
    ~LeapSeconds() { UnsetUTC(); }

    bool ConvertGPSToUnix(const unsigned long gpsSecond, time_t& unixSecond) const;

    void ConvertUnixToGPS(const time_t unixSecond, unsigned long& gpsSecond) const;

    void Dump() const;

  private:
    void Init();

    void SetUTC();

    void UnsetUTC();

    std::time_t fGPSEpochInUnixSeconds;

    GPSToUnixMap fGPSToUnixLeaps;
    UnixToGPSMap fUnixToGPSLeaps;
    std::string* fTZ;
  };

}


#endif