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46 lines
1.5 KiB
C++
46 lines
1.5 KiB
C++
#pragma once
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#include <string>
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namespace ge0
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{
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// Max number of base64 bytes to encode a geo point.
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inline static int const kMaxPointBytes = 10;
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inline static int const kMaxCoordBits = kMaxPointBytes * 3;
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// Generates a short url.
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//
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// URL format:
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//
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// +------------------ 1 byte: zoom level
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// |+-------+--------- 9 bytes: lat,lon
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// || | +--+---- Variable number of bytes: point name
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// || | | |
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// om://ZCoordba64/Name
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std::string GenerateShortShowMapUrl(double lat, double lon, double zoomLevel, std::string const & name);
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// Generates a geo: uri.
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//
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// - https://datatracker.ietf.org/doc/html/rfc5870
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// - https://developer.android.com/guide/components/intents-common#Maps
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// - https://developers.google.com/maps/documentation/urls/android-intents
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//
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// URL format:
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//
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// +-------------------------------- lat
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// | +-------------------- lon
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// | | +---- zoom
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// | | | +-- url-encoded name
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// | | | |
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// | | | |
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// geo:54.683486138,25.289361259&z=14(Forto%20dvaras)
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std::string GenerateGeoUri(double lat, double lon, double zoom, std::string const & name);
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// Exposed for testing.
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char Base64Char(int x);
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int LatToInt(double lat, int maxValue);
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double LonIn180180(double lon);
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int LonToInt(double lon, int maxValue);
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void LatLonToString(double lat, double lon, char * s, size_t nBytes);
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} // namespace ge0
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