ways_cache.c File Reference

Network-based static point and segment types. More...

#include "npoint/tnpoint.h"
#include <assert.h>
#include <float.h>
#include <limits.h>
#include <postgres.h>
#include <libpq/pqformat.h>
#include <executor/spi.h>
#include <utils/memutils.h>
#include <liblwgeom.h>
#include <meos.h>
#include "geo/tgeo_spatialfuncs.h"

Data Structures
struct	struct_WaysCache
	The ways cache holds a fixed number of ways records read from the ways table or CSV file. More...
struct	struct_WaysCacheItem
struct	ways_record
	Structure to represent a record in the ways CSV file. More...

Macros
#define	MAX_LENGTH_GEOM   100001
#define	SQL_MAXLEN   1024
#define	SQL_ROUTE_MAXLEN   64
#define	WAYS_CACHE_ITEMS   128
#define	WAYS_CSV   "/usr/local/share/ways.csv"

Typedefs
typedef struct struct_WaysCache	WaysCache
	The ways cache holds a fixed number of ways records read from the ways table or CSV file. More...
typedef struct struct_WaysCacheItem	WaysCacheItem

Functions
static WaysCacheItem *	AddRouteToWaysCache (WaysCache *ways_cache, ways_record *rec)
	Add a Route to the Ways cache. More...
static void	DeleteRouteFromWaysCache (WaysCache *ways_cache, uint32_t position)
	Remove an entry to the Ways cache. More...
void	DestroyWaysCache (void *cache)
	Destroy all the malloc'ed route records stored in the Ways cache and clear the cash. More...
Npoint *	geompoint_to_npoint (const GSERIALIZED *gs)
	Transform a geometry into a network point. More...
int32_t	get_srid_ways ()
	Return the SRID of the routes in the ways table. More...
bool	get_ways_record (int64 rid, ways_record *rec)
	Access the ways table or CSV file to get the route geometry and length of a route identifier. More...
static WaysCacheItem *	GetRouteFromWaysCache (WaysCache *ways_cache, bool any_gid, int64 gid)
	Get a Ways cache item structure from the Ways cache. More...
WaysCache *	GetWaysCache ()
	Get the Ways cache entry from the global variable if one exists. More...
bool	route_exists (int64 rid)
	Return true if the edge table contains a route with the route identifier. More...
GSERIALIZED *	route_geom (int64 rid)
	Access the edge table to get the route geometry from corresponding route identifier. More...
double	route_length (int64 rid)
	Access the edge table to return the route length from the corresponding route identifier. More...
bool	route_lookup (int64 gid, bool any_gid, ways_record *rec)
	Return true if a Ways structure was read from the Ways cache, return 0 otherwise. More...

Variables
WaysCache *	MEOS_WAYS_CACHE = NULL

Detailed Description

Network-based static point and segment types.