write_nat.c File Reference

Vector library - write vector feature (native format) More...

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <grass/gis.h>
#include <grass/Vect.h>
#include <grass/glocale.h>

Include dependency graph for write_nat.c:

Go to the source code of this file.

Functions
long	V1__rewrite_line_nat (struct Map_info *Map, long offset, int type, struct line_pnts *points, struct line_cats *cats)
	Rewrites feature at the given offset. More...
long	V1_write_line_nat (struct Map_info *Map, int type, struct line_pnts *points, struct line_cats *cats)
	Writes feature to 'coor' file. More...
long	V2_write_line_nat (struct Map_info *Map, int type, struct line_pnts *points, struct line_cats *cats)
	Writes feature to 'coor' file (topology level) More...
long	V1_rewrite_line_nat (struct Map_info *Map, long offset, int type, struct line_pnts *points, struct line_cats *cats)
	Rewrites feature at the given offset. More...
int	V2_rewrite_line_nat (struct Map_info *Map, int line, int type, struct line_pnts *points, struct line_cats *cats)
	Rewrites feature (topology level) More...
int	V1_delete_line_nat (struct Map_info *Map, long offset)
	Deletes feature at the given offset. More...
int	V2_delete_line_nat (struct Map_info *Map, int line)
	Deletes feature (topology level). More...
int	V1_restore_line_nat (struct Map_info *Map, long offset)
	Restores feature at the given offset. More...
int	V2_restore_line_nat (struct Map_info *Map, int line, long offset)
	Restores feature (topology level) More...

Detailed Description

Vector library - write vector feature (native format)

Higher level functions for reading/writing/manipulating vectors.

Operations:

• Add feature
• Rewrite feature
• Delete feature
• Restore feature

(C) 2001-2008 by the GRASS Development Team

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.

V*_restore_line() by Martin Landa <landa.martin gmail.com> (2008)

Date

2001

Definition in file write_nat.c.

Function Documentation

long V1__rewrite_line_nat	(	struct Map_info *	Map,
		long	offset,
		int	type,
		struct line_pnts *	points,
		struct line_cats *	cats
	)

Rewrites feature at the given offset.

Parameters

Map	pointer to vector map
offset	feature offset
type	feature type
points	feature geometry
cats	feature categories

Returns

feature offset

-1 on error

Definition at line 487 of file write_nat.c.

References dig__fwrite_port_C(), dig__fwrite_port_D(), dig__fwrite_port_I(), dig__fwrite_port_S(), dig_fflush(), dig_fseek(), dig_set_cur_port(), dig_type_to_store(), and if().

Referenced by V1_rewrite_line_nat(), and V1_write_line_nat().

int V1_delete_line_nat	(	struct Map_info *	Map,
		long	offset
	)

Deletes feature at the given offset.

Parameters

Map	pointer to vector map
offset	feature offset

Returns

0 on success

-1 on error

Definition at line 584 of file write_nat.c.

References dig__fread_port_C(), dig__fwrite_port_C(), dig_fflush(), dig_fseek(), dig_set_cur_port(), and G_debug().

Referenced by V1_rewrite_line_nat(), and V2_delete_line_nat().

int V1_restore_line_nat	(	struct Map_info *	Map,
		long	offset
	)

Restores feature at the given offset.

Parameters

Map	pointer to vector map
offset	feature offset

Returns

0 on success

-1 on error

Definition at line 823 of file write_nat.c.

References dig__fread_port_C(), dig__fwrite_port_C(), dig_fflush(), dig_fseek(), dig_set_cur_port(), and G_debug().

Referenced by V2_restore_line_nat().

long V1_rewrite_line_nat	(	struct Map_info *	Map,
		long	offset,
		int	type,
		struct line_pnts *	points,
		struct line_cats *	cats
	)

Rewrites feature at the given offset.

If the number of points or cats differs from the original one or the type is changed: GV_POINTS -> GV_LINES or GV_LINES -> GV_POINTS, the old one is deleted and the new is appended to the end of the file.

Old feature is deleted (marked as dead), new feature written.

Parameters

Map	pointer to vector map
offset	feature offset
type	feature type
points	feature geometry
cats	feature categories

Returns

feature offset (rewriten feature)

-1 on error

Definition at line 397 of file write_nat.c.

References dig_fseek(), dig_ftell(), main::GV_LINES, NULL, V1__rewrite_line_nat(), V1_delete_line_nat(), V1_read_line_nat(), Vect_new_cats_struct(), and Vect_new_line_struct().

long V1_write_line_nat	(	struct Map_info *	Map,
		int	type,
		struct line_pnts *	points,
		struct line_cats *	cats
	)

Writes feature to 'coor' file.

Parameters

Map	pointer to vector map
type	feature type
points	feature geometry
cats	feature categories

Returns

feature offset into file

-1 on error

Definition at line 314 of file write_nat.c.

References dig_fseek(), dig_ftell(), and V1__rewrite_line_nat().

Referenced by V2_write_line_nat().

int V2_delete_line_nat	(	struct Map_info *	Map,
		int	line
	)

Deletes feature (topology level).

Parameters

pointer	to vector map
line	feature id

Returns

0 on success

-1 on error

Definition at line 624 of file write_nat.c.

References tools::box, dig_angle_next_line(), dig_cidx_del_cat(), dig_del_area(), dig_del_isle(), dig_del_line(), G_debug(), G_fatal_error(), NULL, V1_delete_line_nat(), V2_read_line_nat(), Vect_attach_centroids(), Vect_attach_isles(), Vect_box_copy(), Vect_box_extend(), Vect_build_line_area(), Vect_get_area_box(), Vect_get_isle_box(), and Vect_new_cats_struct().

Referenced by V2_rewrite_line_nat().

int V2_restore_line_nat	(	struct Map_info *	Map,
		int	line,
		long	offset
	)

Restores feature (topology level)

Parameters

Map	pointer to vector map
line	feature id
offset	feature offset

Returns

0 on success

-1 on error

Definition at line 866 of file write_nat.c.

References tools::box, dig_cidx_add_cat(), dig_line_box(), dig_line_set_box(), dig_restore_line(), G_debug(), G_fatal_error(), NULL, dialogs::type, V1_read_line_nat(), V1_restore_line_nat(), Vect_box_extend(), Vect_new_cats_struct(), and Vect_new_line_struct().

int V2_rewrite_line_nat	(	struct Map_info *	Map,
		int	line,
		int	type,
		struct line_pnts *	points,
		struct line_cats *	cats
	)

Rewrites feature (topology level)

Old feature is deleted (marked as dead), new feature written.

Parameters

Map	pointer to vector map
line	feature id
type	feature type
points	feature geometry
cats	feature category

Returns

new feature id

-1 on error

Definition at line 459 of file write_nat.c.

References V2_delete_line_nat(), and V2_write_line_nat().

long V2_write_line_nat	(	struct Map_info *	Map,
		int	type,
		struct line_pnts *	points,
		struct line_cats *	cats
	)

Writes feature to 'coor' file (topology level)

Parameters

Map	pointer to vector map
type	feature type
points	feature geometry
cats	feature categories

Returns

new feature id

-1 on error

Definition at line 340 of file write_nat.c.

References tools::box, dig_add_line(), dig_line_box(), dig_line_set_box(), G_debug(), V1_write_line_nat(), Vect_box_copy(), and Vect_box_extend().

Referenced by V2_rewrite_line_nat().