geoencode.h

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/* Copyright (C) 2011 Richard Boulton
 * Based closely on a python version, copyright (C) 2010 Olly Betts
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#ifndef XAPIAN_INCLUDED_GEOENCODE_H
#define XAPIAN_INCLUDED_GEOENCODE_H

#include <string>

namespace GeoEncode {

extern bool
encode(double lat, double lon, std::string & result);

extern void
decode(const char * value, size_t len, double & lat_ref, double & lon_ref);

static inline void
decode(const std::string & value, double & lat_ref, double & lon_ref)
{
    return GeoEncode::decode(value.data(), value.size(), lat_ref, lon_ref);
}

class DecoderWithBoundingBox {
    double lon1;

    double lon2;

    double min_lat;

    double max_lat;

    unsigned char start1;

    unsigned char start2;

    bool include_poles;

    bool discontinuous_longitude_range;

  public:
    DecoderWithBoundingBox(double lat1, double lon1, double lat2, double lon2);

    bool decode(const std::string & value,
                double & lat_ref, double & lon_ref) const;
};

}

#endif /* XAPIAN_INCLUDED_GEOENCODE_H */