1 | /* |
2 | * Copyright (c) 2013-2014, yinqiwen <[email protected]> |
3 | * Copyright (c) 2014, Matt Stancliff <[email protected]>. |
4 | * Copyright (c) 2015, Salvatore Sanfilippo <[email protected]>. |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions are met: |
9 | * |
10 | * * Redistributions of source code must retain the above copyright notice, |
11 | * this list of conditions and the following disclaimer. |
12 | * * Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * * Neither the name of Redis nor the names of its contributors may be used |
16 | * to endorse or promote products derived from this software without |
17 | * specific prior written permission. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
20 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
29 | * THE POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #ifndef GEOHASH_HELPER_HPP_ |
33 | #define GEOHASH_HELPER_HPP_ |
34 | |
35 | #include "geohash.h" |
36 | |
37 | #define GZERO(s) s.bits = s.step = 0; |
38 | #define GISZERO(s) (!s.bits && !s.step) |
39 | #define GISNOTZERO(s) (s.bits || s.step) |
40 | |
41 | typedef uint64_t GeoHashFix52Bits; |
42 | typedef uint64_t GeoHashVarBits; |
43 | |
44 | typedef struct { |
45 | GeoHashBits hash; |
46 | GeoHashArea area; |
47 | GeoHashNeighbors neighbors; |
48 | } GeoHashRadius; |
49 | |
50 | uint8_t geohashEstimateStepsByRadius(double range_meters, double lat); |
51 | int geohashBoundingBox(GeoShape *shape, double *bounds); |
52 | GeoHashRadius geohashCalculateAreasByShapeWGS84(GeoShape *shape); |
53 | GeoHashFix52Bits geohashAlign52Bits(const GeoHashBits hash); |
54 | double geohashGetDistance(double lon1d, double lat1d, |
55 | double lon2d, double lat2d); |
56 | int geohashGetDistanceIfInRadius(double x1, double y1, |
57 | double x2, double y2, double radius, |
58 | double *distance); |
59 | int geohashGetDistanceIfInRadiusWGS84(double x1, double y1, double x2, |
60 | double y2, double radius, |
61 | double *distance); |
62 | int geohashGetDistanceIfInRectangle(double width_m, double height_m, double x1, double y1, |
63 | double x2, double y2, double *distance); |
64 | |
65 | #endif /* GEOHASH_HELPER_HPP_ */ |
66 | |