Lines cache for reading feature (non-native formats) More...

#include <dig_structs.h>

Collaboration diagram for Format_info_cache:

Data Fields
struct line_pnts **	lines
	Lines array. More...

int *	lines_types
	List of line types (GV_POINT, GV_LINE, ...) More...

int *	lines_cats
	List of line cats (used only for PostGIS Topology access) More...

int	lines_alloc
	Number of allocated lines in cache. More...

int	lines_num
	Number of lines which forms current feature. More...

int	lines_next
	Next line to be read from cache. More...

long	fid
	Feature id. More...

SF_FeatureType	sf_type
	Simple feature type (currently used only by PG format) More...

int	ctype
	Cache type. More...

Detailed Description

Lines cache for reading feature (non-native formats)

Definition at line 450 of file dig_structs.h.

Field Documentation

◆ ctype

int Format_info_cache::ctype

Cache type.

Currently used only by PostGIS Topology which allows caching the whole map (CACHE_MAP)

Definition at line 496 of file dig_structs.h.

Referenced by V1_rewind_pg(), Vect__get_area_points(), and Vect_get_isle_points().

◆ fid

long Format_info_cache::fid

Feature id.

Definition at line 486 of file dig_structs.h.

Referenced by V1_open_old_ogr(), and V1_rewind_pg().

◆ lines

struct line_pnts** Format_info_cache::lines

Lines array.

Some simple features require more allocated lines (eg. polygon with more rings, multipoint, or geometrycollection)

Line cache is also used for PostGIS Topology to store single topological element (ctype == CACHE_FEATURE) or all elements from the map (ctype == CACHE_MAP) to avoid random access which is very costly.

Definition at line 462 of file dig_structs.h.

Referenced by Vect__free_cache(), and Vect__reallocate_cache().