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0d94108068
* Update the google olc code to not have compiler warnings * With newer BF updates (double) is no longer needed in olc.c
74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
#ifndef OLC_OPENLOCATIONCODE_H_
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#define OLC_OPENLOCATIONCODE_H_
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#include <stdlib.h>
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#define OLC_VERSION_MAJOR 1
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#define OLC_VERSION_MINOR 0
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#define OLC_VERSION_PATCH 0
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// OLC version number: 2.3.4 => 2003004
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// Useful for checking against a particular version or above:
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//
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// #if OLC_VERSION_NUM < OLC_MAKE_VERSION_NUM(1, 0, 2)
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// #error UNSUPPORTED OLC VERSION
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// #endif
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#define OLC_MAKE_VERSION_NUM(major, minor, patch) \
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((major * 1000 + minor) * 1000 + patch)
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// OLC version string: 2.3.4 => "2.3.4"
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#define OLC_MAKE_VERSION_STR_IMPL(major, minor, patch) \
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(#major "." #minor "." #patch)
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#define OLC_MAKE_VERSION_STR(major, minor, patch) \
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OLC_MAKE_VERSION_STR_IMPL(major, minor, patch)
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// Current version, as a number and a string
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#define OLC_VERSION_NUM \
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OLC_MAKE_VERSION_NUM(OLC_VERSION_MAJOR, OLC_VERSION_MINOR, OLC_VERSION_PATCH)
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#define OLC_VERSION_STR \
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OLC_MAKE_VERSION_STR(OLC_VERSION_MAJOR, OLC_VERSION_MINOR, OLC_VERSION_PATCH)
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// A pair of doubles representing latitude / longitude
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typedef struct OLC_LatLon {
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double lat;
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double lon;
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} OLC_LatLon;
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// An area defined by two corners (lo and hi) and a code length
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typedef struct OLC_CodeArea {
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OLC_LatLon lo;
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OLC_LatLon hi;
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size_t len;
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} OLC_CodeArea;
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// Get the center coordinates for an area
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void OLC_GetCenter(const OLC_CodeArea* area, OLC_LatLon* center);
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// Get the effective length for a code
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size_t OLC_CodeLength(const char* code, size_t size);
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// Check for the three obviously-named conditions
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int OLC_IsValid(const char* code, size_t size);
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int OLC_IsShort(const char* code, size_t size);
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int OLC_IsFull(const char* code, size_t size);
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// Encode location with given code length (indicates precision) into an OLC
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// Return the string length of the code
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int OLC_Encode(const OLC_LatLon* location, size_t code_length, char* code);
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// Encode location with default code length into an OLC
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// Return the string length of the code
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int OLC_EncodeDefault(const OLC_LatLon* location, char* code);
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// Decode OLC into the original location
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int OLC_Decode(const char* code, size_t size, OLC_CodeArea* decoded);
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// Compute a (shorter) OLC for a given code and a reference location
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int OLC_Shorten(const char* code, size_t size, const OLC_LatLon* reference,
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char* buf);
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// Given shorter OLC and reference location, compute original (full length) OLC
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int OLC_RecoverNearest(const char* short_code, size_t size,
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const OLC_LatLon* reference, char* code);
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#endif
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