srs.cc File Reference

#include "sql/gis/srs/srs.h"
#include <assert.h>
#include <stddef.h>
#include <cmath>
#include <map>
#include <memory>
#include <sstream>
#include <string>
#include <utility>
#include <vector>
#include <boost/variant/get.hpp>
#include "m_ctype.h"
#include "m_string.h"
#include "my_inttypes.h"
#include "my_sys.h"
#include "mysqld_error.h"
#include "sql/gis/srs/wkt_parser.h"

Namespaces
namespace	gis
namespace	gis::srs

Functions
template<typename T >
static bool	has_no_conflicting_authority (const T &element, const char *name, int code)
	Check that an element doesn't have an authority clause with a different authority name and code. More...
template<typename T >
static bool	has_authority (const T &element, const char *name, int code)
	Check if an element has an authority clause with a given authority name and code. More...
static bool	set_parameters (gis::srid_t srid, gis::srs::wkt_parser::Projected_cs *proj, std::vector< std::pair< int, double * > > *params)
	Extract projection parameter values from the parse tree and assign them to variables. More...
static const char *	axis_direction_to_name (gis::srs::Axis_direction direction)
void	push_fp_to_string (std::stringstream &proj4, const std::string &proj4_parameter, const double &parameter)
static bool	create_geographic_srs (gis::srid_t srid, gis::srs::wkt_parser::Geographic_cs *geog, gis::srs::Geographic_srs **srs)
	Create a geographic SRS description from a parse tree. More...
static gis::srs::Projected_srs *	new_projection (int epsg_code)
	Create a new projected SRS object based on EPSG code. More...
static bool	create_projected_srs (gis::srid_t srid, gis::srs::wkt_parser::Projected_cs *proj, gis::srs::Projected_srs **srs)
	Create a projected SRS description from a parse tree. More...

Function Documentation

axis_direction_to_name()

static const char * axis_direction_to_name ( gis::srs::Axis_direction  direction )

static

create_geographic_srs()

static bool create_geographic_srs ( gis::srid_t  srid, gis::srs::wkt_parser::Geographic_cs *  geog, gis::srs::Geographic_srs **  srs  )

static

Create a geographic SRS description from a parse tree.

Parameters

[in]	srid	Spatial reference system ID to use when reporting errors
[in]	geog	Parser output
[in,out]	srs	Geographic SRS object allocated by the caller

Return values

true	An error has occurred
false	Success

create_projected_srs()

static bool create_projected_srs ( gis::srid_t  srid, gis::srs::wkt_parser::Projected_cs *  proj, gis::srs::Projected_srs **  srs  )

static

Create a projected SRS description from a parse tree.

Parameters

[in]	srid	Spatial reference system ID to use when reporting errors
[in]	proj	Parser output
[out]	srs	A newly allocated projected SRS object

Return values

true	An error has occurred
false	Success

has_authority()

template<typename T >

static bool has_authority ( const T &  element, const char *  name, int  code  )

static

Check if an element has an authority clause with a given authority name and code.

The function will return true if the element has an authority clause which name matches (case insensitively) with the name parameter and a code which is the same as the code parameter.

Template Parameters

T	The type of the element with the authority clause.

Parameters

element	The element with the authority clause.
name	The authority name to check for.
code	The authority code to check for.

Return values

true	The element has the specified authority clause.
false	The element doesn't have the specified authority clause.

has_no_conflicting_authority()

template<typename T >

static bool has_no_conflicting_authority ( const T &  element, const char *  name, int  code  )

static

Check that an element doesn't have an authority clause with a different authority name and code.

The function will return true if the element has no authority clause, or if it has an authority clause with a name that matches (case insensitively) with the name parameter and a code that is the same as the code parameter.

Template Parameters

T	The type of the element with the authority clause.

Parameters

element	The element with the authority clause.
name	The authority name to check for.
code	The authority code to check for.

Return values

true	The element has no other authority clause.
false	The element has another authority clause.

new_projection()

static gis::srs::Projected_srs * new_projection ( int  epsg_code )

static

Create a new projected SRS object based on EPSG code.

When creating a projected SRS object for a projection without an EPSG code, code 0 should be used.

If the EPSG code is 0 or unknown, an Unkown_projected_srs object is returned.

Parameters

epsg_code

EPSG coordinate operation method (i.e. projection type) code

Returns

New projected SRS object. The caller is responsible for deleting it.

push_fp_to_string()

void push_fp_to_string	(	std::stringstream &	proj4,
		const std::string &	proj4_parameter,
		const double &	parameter
	)

set_parameters()

static bool set_parameters ( gis::srid_t  srid, gis::srs::wkt_parser::Projected_cs *  proj, std::vector< std::pair< int, double * > > *  params  )

static

Extract projection parameter values from the parse tree and assign them to variables.

The function is given a list of EPSG parameter codes for all parameters that can be extracted, and pointers to the variable where each parameter should be stored.

Mandatory parameters must be set to NAN before calling this function. Optional parameters must be set to their default value.

If a mandatory parameter is missing, an error is flagged and the function returns true.

Parameters

[in]	srid	The spatial reference system ID, used in error reporting
[in]	proj	Parse tree
[in,out]	params	List of mandatory parameters (EPSG codes) and pointers to where their values should be stored.

Return values

true	An error has occurred. The error has been flagged.
false	Success