66 lines
2.9 KiB
C
66 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2013-2014, yinqiwen <yinqiwen@gmail.com>
|
|
* Copyright (c) 2014, Matt Stancliff <matt@genges.com>.
|
|
* Copyright (c) 2015-current, Redis Ltd.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of Redis nor the names of its contributors may be used
|
|
* to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
|
|
* THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef GEOHASH_HELPER_HPP_
|
|
#define GEOHASH_HELPER_HPP_
|
|
|
|
#include "geohash.h"
|
|
|
|
#define GZERO(s) s.bits = s.step = 0;
|
|
#define GISZERO(s) (!s.bits && !s.step)
|
|
#define GISNOTZERO(s) (s.bits || s.step)
|
|
|
|
typedef uint64_t GeoHashFix52Bits;
|
|
typedef uint64_t GeoHashVarBits;
|
|
|
|
typedef struct {
|
|
GeoHashBits hash;
|
|
GeoHashArea area;
|
|
GeoHashNeighbors neighbors;
|
|
} GeoHashRadius;
|
|
|
|
uint8_t geohashEstimateStepsByRadius(double range_meters, double lat);
|
|
int geohashBoundingBox(GeoShape *shape, double *bounds);
|
|
GeoHashRadius geohashCalculateAreasByShapeWGS84(GeoShape *shape);
|
|
GeoHashFix52Bits geohashAlign52Bits(const GeoHashBits hash);
|
|
double geohashGetDistance(double lon1d, double lat1d,
|
|
double lon2d, double lat2d);
|
|
int geohashGetDistanceIfInRadius(double x1, double y1,
|
|
double x2, double y2, double radius,
|
|
double *distance);
|
|
int geohashGetDistanceIfInRadiusWGS84(double x1, double y1, double x2,
|
|
double y2, double radius,
|
|
double *distance);
|
|
int geohashGetDistanceIfInRectangle(double width_m, double height_m, double x1, double y1,
|
|
double x2, double y2, double *distance);
|
|
|
|
#endif /* GEOHASH_HELPER_HPP_ */
|