MySQL 8.0.29
Source Code Documentation
st_units_of_measure.h
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1#ifndef SQL_GIS_ST_UNITS_OF_MEASURE_H_INCLUDED
2#define SQL_GIS_ST_UNITS_OF_MEASURE_H_INCLUDED
3
4/* Copyright (c) 2018, 2021, Oracle and/or its affiliates.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License, version 2.0,
8 as published by the Free Software Foundation.
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10 This program is also distributed with certain software (including
11 but not limited to OpenSSL) that is licensed under separate terms,
12 as designated in a particular file or component or in included license
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14 permission to link the program and your derivative works with the
15 separately licensed software that they have included with MySQL.
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17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License, version 2.0, for more details.
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22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */
25
26#include <string.h>
27
28#include "map_helpers.h"
29
30namespace gis {
31enum class Unit_Type { kLinear };
32
33struct Unit {
36 std::string description;
37
38 Unit() = default;
39
42 bool operator==(const gis::Unit &rhs) const {
43 return unit_type == rhs.unit_type &&
46 }
47};
48
49/// A function to obtaint the supported units for the gis module.
50///
51/// @return Map of supported units for ST_DISTANCE
53
54/// Retrieves the length of the unit in meters.
55/// @param unit the name of the unit we want the conversion factor for.
56/// @param[out] conversion_factor A pointer to where the result should be put,
57/// not touched in case of error.
58/// @retval True if unit is not found.
59/// @retval False in case of success.
60bool get_conversion_factor(const std::string &unit, double *conversion_factor);
61
62} // namespace gis
63
64#endif // SQL_GIS_ST_UNITS_OF_MEASURE_H_INCLUDED
std::unordered_map, but with my_malloc and collation-aware comparison.
Definition: map_helpers.h:209
Definition: area.cc:46
collation_unordered_map< std::string, Unit > units()
A function to obtaint the supported units for the gis module.
Definition: st_units_of_measure.cc:28
bool get_conversion_factor(const std::string &unit, double *conversion_factor)
Retrieves the length of the unit in meters.
Definition: st_units_of_measure.cc:117
Unit_Type
Definition: st_units_of_measure.h:31
Definition: st_units_of_measure.h:33
Unit(const Unit_Type unit_type, const double conversion_factor)
Definition: st_units_of_measure.h:40
Unit()=default
std::string description
Definition: st_units_of_measure.h:36
Unit_Type unit_type
Definition: st_units_of_measure.h:34
double conversion_factor
Definition: st_units_of_measure.h:35
bool operator==(const gis::Unit &rhs) const
Definition: st_units_of_measure.h:42