Vector library - Open existing or create new vector map (native or OGR/PostGIS format) More...

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <grass/vector.h>
#include <grass/glocale.h>
#include "local_proto.h"
#include "pg_local_proto.h"

Include dependency graph for vector/Vlib/open.c:

Go to the source code of this file.

Macros
#define	MAX_OPEN_LEVEL 2

Functions
int	Vect_set_open_level (int level)
	Predetermine level at which a vector map will be opened for reading. More...

int	Vect__open_old (struct Map_info Map, const char name, const char mapset, const char layer, int update, int head_only, int is_tmp)
	Open existing vector map for reading (internal use only) More...

int	Vect_open_old (struct Map_info Map, const char name, const char *mapset)
	Open existing vector map for reading. More...

int	Vect_open_tmp_old (struct Map_info Map, const char name, const char *mapset)
	Open existing temporary vector map for reading. More...

int	Vect_open_old2 (struct Map_info Map, const char name, const char mapset, const char layer)
	Open existing vector map for reading. More...

int	Vect_open_update (struct Map_info Map, const char name, const char *mapset)
	Open existing vector map for reading/writing. More...

int	Vect_open_tmp_update (struct Map_info Map, const char name, const char *mapset)
	Open existing temporary vector map for reading/writing. More...

int	Vect_open_update2 (struct Map_info Map, const char name, const char mapset, const char layer)
	Open existing vector map for reading/writing. More...

int	Vect_open_old_head (struct Map_info Map, const char name, const char *mapset)
	Reads only info about vector map (headers) More...

int	Vect_open_old_head2 (struct Map_info Map, const char name, const char mapset, const char layer)
	Reads only info about vector map (headers) More...

int	Vect_open_update_head (struct Map_info Map, const char name, const char *mapset)
	Open header file of existing vector map for updating (mostly for database link updates) More...

int	Vect_open_new (struct Map_info Map, const char name, int with_z)
	Create new vector map for reading/writing. More...

int	Vect_open_tmp_new (struct Map_info Map, const char name, int with_z)
	Create new temporary vector map. More...

int	Vect_coor_info (struct Map_info Map, struct Coor_info Info)
	Update Coor_info structure. More...

const char *	Vect_maptype_info (struct Map_info *Map)
	Gets vector map format (as string) More...

int	Vect_maptype (struct Map_info *Map)
	Gets vector map format. More...

int	Vect_open_topo (struct Map_info *Map, int head_only)
	Open topology file ('topo') More...

int	Vect_open_sidx (struct Map_info *Map, int mode)
	Open spatial index file ('sidx') More...

char *	Vect__get_path (char path, struct Map_info Map)
	Get map directory name (internal use only) More...

char *	Vect__get_element_path (char file_path, struct Map_info Map, const char *element)
	Get map element full path (internal use only) More...

Detailed Description

Vector library - Open existing or create new vector map (native or OGR/PostGIS format)

Higher level functions for reading/writing/manipulating vectors.

This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.

Author: Original author CERL, probably Dave Gerdes or Mike Higgins.; Update to GRASS 5.7 Radim Blazek and David D. Gray.; Update to GRASS 7 Martin Landa <landa.martin gmail.com> (better OGR support and native PostGIS access)

Definition in file vector/Vlib/open.c.

Macro Definition Documentation

◆ MAX_OPEN_LEVEL

#define MAX_OPEN_LEVEL 2

Definition at line 45 of file vector/Vlib/open.c.

Function Documentation

◆ Vect__get_element_path()

char* Vect__get_element_path	(	char *	file_path,
		struct Map_info *	Map,
		const char *	element
	)

Get map element full path (internal use only)

Allocate string should be freed by G_free().

Parameters

Map	pointer to Map_info struct
element	element name, eg. GV_TOPO_ELEMENT

Returns: allocated buffer containing path

Definition at line 1518 of file vector/Vlib/open.c.

References G_file_name(), G_file_name_tmp(), GPATH_MAX, Map_info::mapset, Map_info::temporary, and Vect__get_path().

Referenced by V1_close_nat(), V1_open_new_nat(), V2_close_pg(), Vect_cidx_open(), Vect_coor_info(), Vect_open_topo(), Vect_save_fidx(), and Vect_save_sidx().

◆ Vect__get_path()

char* Vect__get_path	(	char *	path,
		struct Map_info *	Map
	)

Get map directory name (internal use only)

Parameters

file_path	path string buffer
Map	pointer to Map_info struct

Returns: buffer containing path

Definition at line 1493 of file vector/Vlib/open.c.

References G__temp_element(), GPATH_MAX, GV_DIRECTORY, Map_info::name, Map_info::temporary, and TRUE.

Referenced by V1_open_new_nat(), V1_open_old_nat(), Vect__get_element_path(), Vect__read_head(), Vect__write_head(), Vect_cidx_open(), Vect_open_topo(), Vect_save_topo(), and Vect_write_dblinks().

◆ Vect__open_old()

int Vect__open_old	(	struct Map_info *	Map,
		const char *	name,
		const char *	mapset,
		const char *	layer,
		int	update,
		int	head_only,
		int	is_tmp
	)

Open existing vector map for reading (internal use only)

Parameters

[out]	Map	pointer to Map_info structure
	name	name of vector map to open
	mapset	mapset name ("" for search path)
	layer	layer name (OGR format only)
	update	non-zero to open for update otherwise read-only mode
	head_only	read only header info from 'head', 'dbln', 'topo', 'cidx' is not opened. The header may be opened on level 2 only.
	is_tmp	non-zero code for temporary maps

Returns: level of openness (1, 2); -1 in error

Definition at line 166 of file vector/Vlib/open.c.

References GMAPSET_MAX, GNAME_MAX, GPATH_MAX, and Map_info::level.

Referenced by Vect_open_old(), Vect_open_old2(), Vect_open_old_head(), Vect_open_old_head2(), Vect_open_tmp_old(), Vect_open_tmp_update(), Vect_open_update(), Vect_open_update2(), and Vect_open_update_head().

◆ Vect_coor_info()

int Vect_coor_info	(	struct Map_info *	Map,
		struct Coor_info *	Info
	)

Update Coor_info structure.

Parameters

	Map	pointer to Map_info structure
[out]	Info	pointer to Coor_info structure

Returns: 1 on success; 0 on error

Definition at line 1010 of file vector/Vlib/open.c.

References _, Map_info::dig_fp, dig_fseek(), dig_ftell(), Map_info::format, G_debug(), G_warning(), GPATH_MAX, GV_COOR_ELEMENT, GV_FORMAT_NATIVE, GV_FORMAT_OGR, GV_FORMAT_OGR_DIRECT, GV_FORMAT_POSTGIS, Coor_info::mtime, Map_info::open, Coor_info::size, Vect__get_element_path(), and VECT_OPEN_CODE.

Referenced by V1_close_nat(), V1_open_old_nat(), and Vect_open_topo().

◆ Vect_maptype()

int Vect_maptype ( struct Map_info * Map )

Gets vector map format.

Currently are implemented:

Native format (GV_FORMAT_NATIVE)
OGR format linked via v.external (GV_FORMAT_OGR)
OGR format (GV_FORMAT_OGR_DIRECT)
PostGIS format (GV_FORMAT_POSTGIS)

Parameters

Map	pointer to Map_info structure

Returns: map format code

Definition at line 1104 of file vector/Vlib/open.c.

References Format_info_pg::conninfo, Format_info_ogr::driver_name, Map_info::fInfo, Map_info::format, GV_FORMAT_OGR, GV_FORMAT_POSTGIS, Format_info::ogr, Format_info::pg, and Map_info::temporary.

Referenced by Vect_fidx_dump().

◆ Vect_maptype_info()

const char* Vect_maptype_info ( struct Map_info * Map )

Gets vector map format (as string)

Note: string is allocated by G_store(). Free allocated memory with G_free().

Currently are implemented:

Native format (native)
OGR format (ogr)
PostGIS format (postgis)

Parameters

Map	pointer to Map_info structure

Returns: maptype string on success (allocated by G_store()); error message on error

Definition at line 1068 of file vector/Vlib/open.c.

References _, Map_info::format, G_store(), GV_FORMAT_NATIVE, GV_FORMAT_OGR, GV_FORMAT_OGR_DIRECT, and GV_FORMAT_POSTGIS.

Referenced by Vect_fidx_dump().

◆ Vect_open_new()

int Vect_open_new	(	struct Map_info *	Map,
		const char *	name,
		int	with_z
	)

Create new vector map for reading/writing.

By default list of updated features is not maintained, see Vect_set_updated() for details.

By default map format is native (GV_FORMAT_NATIVE). If OGR file is found in the current mapset then the map (ie. OGR layer) is created in given OGR datasource (GV_FORMAT_OGR). Similarly if PG file exists then the map (ie. PostGIS table) is created using PostGIS interface (GV_FORMAT_POSTGIS). The format of map is stored in Map->format.

Parameters

[out]	Map	pointer to Map_info structure
	name	name of vector map to be created
	with_z	WITH_Z for 3D vector data otherwise WITHOUT_Z

Returns: 1 on success; -1 on error

Definition at line 955 of file vector/Vlib/open.c.

References G_debug().

Referenced by Vect_close().

◆ Vect_open_old()

int Vect_open_old	(	struct Map_info *	Map,
		const char *	name,
		const char *	mapset
	)

Open existing vector map for reading.

This function is replaced by Vect_open_old2() to handle also direct OGR support.

Calls G_fatal_error() on failure.

Parameters

[out]	Map	pointer to Map_info structure
	name	name of vector map to open
	mapset	mapset name ("" for search path)

Returns: 1 open on level 1 (without topology); 2 open on level 2 (with topology); -1 on error

Definition at line 597 of file vector/Vlib/open.c.

References FALSE, Map_info::mapset, name, NULL, and Vect__open_old().

◆ Vect_open_old2()

int Vect_open_old2	(	struct Map_info *	Map,
		const char *	name,
		const char *	mapset,
		const char *	layer
	)

Open existing vector map for reading.

Calls G_fatal_error() on failure.

Parameters

[out]	Map	pointer to Map_info structure
	name	name of vector map to open (datasource for direct OGR access)
	mapset	mapset name ("" for search path, "OGR" for direct OGR access)
	layer	layer name (OGR layer for direct OGR access)

Returns: 1 open on level 1 (without topology); 2 open on level 2 (with topology); -1 on error

Definition at line 640 of file vector/Vlib/open.c.

References FALSE, Map_info::mapset, name, and Vect__open_old().

◆ Vect_open_old_head()

int Vect_open_old_head	(	struct Map_info *	Map,
		const char *	name,
		const char *	mapset
	)

Reads only info about vector map (headers)

Reads from headers of 'head', 'dbln', 'topo' and 'cidx' file.

This function is replaced by Vect_open_old_head2() to handle also direct OGR support.

Calls G_fatal_error() on failure.

Parameters

[out]	Map	pointer to Map_info structure
	name	name of vector map to read
	mapset	mapset name ("" for search path)

Returns: 1 open on level 1 (without topology); 2 open on level 2 (with topology); -1 on error

Definition at line 738 of file vector/Vlib/open.c.

References FALSE, Map_info::mapset, name, NULL, TRUE, and Vect__open_old().

◆ Vect_open_old_head2()

int Vect_open_old_head2	(	struct Map_info *	Map,
		const char *	name,
		const char *	mapset,
		const char *	layer
	)

Reads only info about vector map (headers)

Reads from headers of 'head', 'dbln', 'topo' and 'cidx' file.

Calls G_fatal_error() on failure.

Parameters

[out]	Map	pointer to Map_info structure
	name	name of vector map to read (dsn for OGR)
	mapset	mapset name ("" for search path)
	layer	layer name (OGR format)
[out]	Map	pointer to Map_info structure
	name	name of vector map to open (datasource for direct OGR access)
	mapset	mapset name ("" for search path, "OGR" for direct OGR access)
	layer	layer name (OGR layer for direct OGR access)

Returns: 1 open on level 1 (without topology); 2 open on level 2 (with topology); -1 on error

Definition at line 765 of file vector/Vlib/open.c.

References FALSE, Map_info::mapset, name, TRUE, and Vect__open_old().

◆ Vect_open_sidx()

int Vect_open_sidx	(	struct Map_info *	Map,
		int	mode
	)

Open spatial index file ('sidx')

Parameters

[in,out]	Map	pointer to Map_info
	mode	0 old, 1 update, 2 new

Returns: 1 if sidx file is not available; 0 on success; -1 on error

Definition at line 1212 of file vector/Vlib/open.c.

Referenced by Vect_build_partial().

◆ Vect_open_tmp_new()

int Vect_open_tmp_new	(	struct Map_info *	Map,
		const char *	name,
		int	with_z
	)

Create new temporary vector map.

Temporary vector maps are stored in the current mapset (directory .tmp/<hostname>/vector). If the map already exists, it is overwritten.

Temporary vector maps are automatically deleted when closing the map (see Vect_close() for details).

If name is not given (is NULL), then the name is determined by process id (tmp_<pid>).

Parameters

[out]	Map	pointer to output Map_info struct
	name	name for new vector map (or NULL)
	with_z	WITH_Z for 3D vector data otherwise WITHOUT_Z

Returns: 1 on success; -1 on error

Definition at line 986 of file vector/Vlib/open.c.

References G_debug(), GNAME_MAX, and name.

◆ Vect_open_tmp_old()

int Vect_open_tmp_old	(	struct Map_info *	Map,
		const char *	name,
		const char *	mapset
	)

Open existing temporary vector map for reading.

Temporary vector maps are stored in the current mapset (directory .tmp/<hostname>/vector).

Calls G_fatal_error() on failure.

Todo:: Create new vector map if doesn't exist.

Parameters

[out]	Map	pointer to Map_info structure
	name	name of vector map to open
	mapset	mapset name ("" for search path)

Returns: 1 open on level 1 (without topology); 2 open on level 2 (with topology); -1 on error

Definition at line 620 of file vector/Vlib/open.c.

References FALSE, Map_info::mapset, name, NULL, TRUE, and Vect__open_old().

◆ Vect_open_tmp_update()

int Vect_open_tmp_update	(	struct Map_info *	Map,
		const char *	name,
		const char *	mapset
	)

Open existing temporary vector map for reading/writing.

Temporary vector maps are stored in the current mapset (directory .tmp/<hostname>/vector).

By default list of updated features is not maintained, see Vect_set_updated() for details.

Calls G_fatal_error() on failure.

Todo:: Create new vector map if doesn't exist.

Parameters

[out]	Map	pointer to Map_info structure
	name	name of vector map to update
	mapset	mapset name

Returns: 1 open on level 1 (without topology); 2 open on level 2 (with topology); -1 on error

Definition at line 691 of file vector/Vlib/open.c.

References FALSE, Map_info::mapset, name, NULL, TRUE, and Vect__open_old().

◆ Vect_open_topo()

int Vect_open_topo	(	struct Map_info *	Map,
		int	head_only
	)

Open topology file ('topo')

Parameters

[in,out]	Map	pointer to Map_info structure
	head_only	TRUE to read only header

Returns: 0 on success; 1 file does not exist; -1 on error

Definition at line 1131 of file vector/Vlib/open.c.

References _, Plus_head::coor_mtime, Plus_head::coor_size, dig_file_init(), dig_load_plus(), dig_Rd_Plus_head(), err(), gvfile::file, G_debug(), G_fopen_old(), G_warning(), GPATH_MAX, GV_TOPO_ELEMENT, Map_info::mapset, Map_info::name, NULL, Map_info::plus, Coor_info::size, Vect__get_element_path(), Vect__get_path(), and Vect_coor_info().

◆ Vect_open_update()

int Vect_open_update	(	struct Map_info *	Map,
		const char *	name,
		const char *	mapset
	)

Open existing vector map for reading/writing.

This function is replaced by Vect_open_update2() to handle also direct OGR support.

By default list of updated features is not maintained, see Vect_set_updated() for details.

Calls G_fatal_error() on failure.

Parameters

[out]	Map	pointer to Map_info structure
	name	name of vector map to update
	mapset	mapset name

Returns: 1 open on level 1 (without topology); 2 open on level 2 (with topology); -1 on error

Definition at line 665 of file vector/Vlib/open.c.

References FALSE, Map_info::mapset, name, NULL, TRUE, and Vect__open_old().

◆ Vect_open_update2()

int Vect_open_update2	(	struct Map_info *	Map,
		const char *	name,
		const char *	mapset,
		const char *	layer
	)

Open existing vector map for reading/writing.

By default list of updated features is not maintained, see Vect_set_updated() for details.

Calls G_fatal_error() on failure.

Parameters

[out]	Map	pointer to Map_info structure
	name	name of vector map to open (datasource for direct OGR access)
	mapset	mapset name ("" for search path, "OGR" for direct OGR access)
	layer	layer name (OGR layer for direct OGR access)

Returns: 1 open on level 1 (without topology); 2 open on level 2 (with topology); -1 on error

Definition at line 714 of file vector/Vlib/open.c.

References FALSE, Map_info::mapset, name, TRUE, and Vect__open_old().

◆ Vect_open_update_head()

int Vect_open_update_head	(	struct Map_info *	Map,
		const char *	name,
		const char *	mapset
	)

Open header file of existing vector map for updating (mostly for database link updates)

Parameters

[out]	Map	pointer to Map_info structure
	name	name of vector map to update
	mapset	mapset name

Returns: 1 open on level 1 (without topology); 2 open on level 2 (with topology); -1 on error

Definition at line 782 of file vector/Vlib/open.c.

References FALSE, Map_info::mapset, name, NULL, TRUE, and Vect__open_old().

◆ Vect_set_open_level()

int Vect_set_open_level ( int level )

Predetermine level at which a vector map will be opened for reading.

If it can't open that level, the open will fail. The specified level must be set before any call to open. The default is to try to open the highest level possible, and keep stepping down until success.

NOTE: This should only be used to set when you wish to force a lower level open. If you require a higher level, then just check the return to verify the level instead of forcing it. This is because future releases will have higher levels which will be downward compatible and which your programs should support by default.

Parameters

level vector access level

Returns: 0 on success; 1 on error (invalid access level)

Definition at line 138 of file vector/Vlib/open.c.

Macros

Functions

Detailed Description

Macro Definition Documentation

◆ MAX_OPEN_LEVEL

Function Documentation

◆ Vect__get_element_path()

◆ Vect__get_path()

◆ Vect__open_old()

◆ Vect_coor_info()

◆ Vect_maptype()

◆ Vect_maptype_info()

◆ Vect_open_new()

◆ Vect_open_old()

◆ Vect_open_old2()

◆ Vect_open_old_head()

◆ Vect_open_old_head2()

◆ Vect_open_sidx()

◆ Vect_open_tmp_new()

◆ Vect_open_tmp_old()

◆ Vect_open_tmp_update()

◆ Vect_open_topo()

◆ Vect_open_update()

◆ Vect_open_update2()

◆ Vect_open_update_head()

◆ Vect_set_open_level()