Program Listing for File utm_util.h

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#ifndef TRANSFORM_UTIL_UTM_UTIL_H_
#define TRANSFORM_UTIL_UTM_UTIL_H_

#include <stdint.h>

#include <boost/serialization/singleton.hpp>
#include <boost/thread/mutex.hpp>

#include <proj_api.h>

namespace swri_transform_util
{
  uint32_t GetZone(double longitude);

  char GetBand(double latitude);

  class UtmUtil
  {
  public:
    UtmUtil();

    void ToUtm(
      double latitude, double longitude,
      int& zone, char& band, double& easting, double& northing) const;

    void ToUtm(
      double latitude, double longitude,
      double& easting, double& northing) const;

    void ToLatLon(
      int zone, char band, double easting, double northing,
      double& latitude, double& longitude) const;

  private:
    class UtmData
    {
      public:
        ~UtmData();

        void ToUtm(
          double latitude, double longitude,
          int& zone, char& band, double& easting, double& northing) const;

        void ToUtm(
          double latitude, double longitude,
          double& easting, double& northing) const;

        void ToLatLon(
          int zone, char band, double easting, double northing,
          double& latitude, double& longitude) const;

#if (BOOST_VERSION / 100 % 1000) >= 65 && (BOOST_VERSION / 100 % 1000) < 69
        friend class boost::serialization::singleton<swri_transform_util::UtmUtil::UtmData>;
#else
        friend class boost::serialization::detail::singleton_wrapper<swri_transform_util::UtmUtil::UtmData>;
#endif
      private:
        UtmData();

        projPJ lat_lon_;
        projPJ utm_north_[60];
        projPJ utm_south_[60];

        mutable boost::mutex mutex_;
    };
    typedef boost::serialization::singleton<UtmData> UtmDataSingleton;

    const UtmData& utm_data_;
  };
}

#endif  // TRANSFORM_UTIL_UTM_UTIL_H_