gserialized.c File Reference

#include "liblwgeom_internal.h"
#include "gserialized1.h"
#include "gserialized2.h"

Include dependency graph for gserialized.c:

Go to the source code of this file.

Macros
#define	GFLAG_Z   0x01
#define	GFLAG_M   0x02
#define	GFLAG_BBOX   0x04
#define	GFLAG_GEODETIC   0x08
#define	GFLAG_VER_0   0x40
#define	GFLAGS_GET_VERSION(gflags)   (((gflags) & GFLAG_VER_0)>>6)
#define	G2FLAG_EXTENDED   0x10
	Return -1 if g1 is "less than" g2, 1 if g1 is "greater than" g2 and 0 if g1 and g2 are the "same".

Functions
lwflags_t	gserialized_get_lwflags (const GSERIALIZED *g)
	Read the flags from a GSERIALIZED and return a standard lwflag integer.
GSERIALIZED *	gserialized_set_gbox (GSERIALIZED *g, GBOX *gbox)
	Copy a new bounding box into an existing gserialized.
uint32_t	gserialized_get_version (const GSERIALIZED *g)
	Return the serialization version.
GSERIALIZED *	gserialized_drop_gbox (GSERIALIZED *g)
	Remove the bounding box from a GSERIALIZED.
int	gserialized_get_gbox_p (const GSERIALIZED *g, GBOX *gbox)
	Read the box from the GSERIALIZED or calculate it if necessary.
int	gserialized_fast_gbox_p (const GSERIALIZED *g, GBOX *gbox)
	Read the box from the GSERIALIZED or return #LWFAILURE if box is unavailable.
uint32_t	gserialized_get_type (const GSERIALIZED *g)
	Extract the geometry type from the serialized form (it hides in the anonymous data area, so this is a handy function).
uint32_t	gserialized_max_header_size (void)
	Returns the size in bytes to read from toast to get the basic information from a geometry: GSERIALIZED struct, bbox and type.
int32_t	gserialized_hash (const GSERIALIZED *g)
	Returns a hash code for the srid/type/geometry information in the GSERIALIZED.
int32_t	gserialized_get_srid (const GSERIALIZED *g)
	Extract the SRID from the serialized form (it is packed into three bytes so this is a handy function).
void	gserialized_set_srid (GSERIALIZED *g, int32_t srid)
	Write the SRID into the serialized form (it is packed into three bytes so this is a handy function).
int	gserialized_is_empty (const GSERIALIZED *g)
	Check if a GSERIALIZED is empty without deserializing first.
int	gserialized_has_bbox (const GSERIALIZED *g)
	Check if a GSERIALIZED has a bounding box without deserializing first.
int	gserialized_has_z (const GSERIALIZED *g)
	Check if a GSERIALIZED has a Z ordinate.
int	gserialized_has_m (const GSERIALIZED *g)
	Check if a GSERIALIZED has an M ordinate.
int	gserialized_is_geodetic (const GSERIALIZED *g)
	Check if a GSERIALIZED is a geography.
int	gserialized_ndims (const GSERIALIZED *g)
	Return the number of dimensions (2, 3, 4) in a geometry.
GSERIALIZED *	gserialized_from_lwgeom (LWGEOM *geom, size_t *size)
	Allocate a new GSERIALIZED from an LWGEOM.
size_t	gserialized_from_lwgeom_size (const LWGEOM *geom)
	Return the memory size a GSERIALIZED will occupy for a given LWGEOM.
LWGEOM *	lwgeom_from_gserialized (const GSERIALIZED *g)
	Allocate a new LWGEOM from a GSERIALIZED.
const float *	gserialized_get_float_box_p (const GSERIALIZED *g, size_t *ndims)
	Access to the float bounding box, if there is one.
int	gserialized_peek_first_point (const GSERIALIZED *g, POINT4D *out_point)
	Pull the first point values of a GSERIALIZED.
static size_t	gserialized_header_size (const GSERIALIZED *g)
static int	gserialized_cmp_srid (const GSERIALIZED *g1, const GSERIALIZED *g2)
int	gserialized_cmp (const GSERIALIZED *g1, const GSERIALIZED *g2)
	Return -1 if g1 is "less than" g2, 1 if g1 is "greater than" g2 and 0 if g1 and g2 are the "same".
uint64_t	gserialized_get_sortable_hash (const GSERIALIZED *g)
	Return a sortable key based on gserialized.
void	gserialized_error_if_srid_mismatch (const GSERIALIZED *g1, const GSERIALIZED *g2, const char *funcname)
void	gserialized_error_if_srid_mismatch_reference (const GSERIALIZED *g1, const int32_t srid2, const char *funcname)