mirror of
https://github.com/fluencelabs/redis
synced 2025-03-22 02:20:49 +00:00
fa9d62d34f
The GIS standard and all the major DBs implementing GIS related functions take coordinates as x,y that is longitude,latitude. It was a bad start for Redis to do things differently, so even if this means that existing users of the Geo module will be required to change their code, Redis now conforms to the standard. Usually Redis is very backward compatible, but this is not an exception to this rule, since this is the first Geo implementation entering the official Redis source code. It is not wise to try to be backward compatible with code forks... :-) Close #2637.
69 lines
3.1 KiB
C
69 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2013-2014, yinqiwen <yinqiwen@gmail.com>
|
|
* Copyright (c) 2014, Matt Stancliff <matt@genges.com>.
|
|
* 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 <math.h>
|
|
#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;
|
|
|
|
int GeoHashBitsComparator(const GeoHashBits *a, const GeoHashBits *b);
|
|
uint8_t geohashEstimateStepsByRadius(double range_meters, double lat);
|
|
int geohashBoundingBox(double longitude, double latitude, double radius_meters,
|
|
double *bounds);
|
|
GeoHashRadius geohashGetAreasByRadius(double longitude,
|
|
double latitude, double radius_meters);
|
|
GeoHashRadius geohashGetAreasByRadiusWGS84(double longitude, double latitude,
|
|
double radius_meters);
|
|
GeoHashRadius geohashGetAreasByRadiusMercator(double longitude, double latitude,
|
|
double radius_meters);
|
|
GeoHashFix52Bits geohashAlign52Bits(const GeoHashBits hash);
|
|
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);
|
|
|
|
#endif /* GEOHASH_HELPER_HPP_ */
|