GRASS GIS 8 Programmer's Manual: plus.c File Reference

GRASS GIS 8 Programmer's Manual 8.2.2dev(2023)-3d2c704037

Vector library - update topo structure (lower level functions) More...

#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <grass/vector.h>
#include <grass/glocale.h>

Include dependency graph for plus.c:

Go to the source code of this file.

Functions
int	dig_init_plus (struct Plus_head *Plus)
	Initialize Plus_head structure. More...

void	dig_free_plus_nodes (struct Plus_head *Plus)
	Free Plus->Node structure. More...

void	dig_free_plus_lines (struct Plus_head *Plus)
	Free Plus->Line structure. More...

void	dig_free_plus_areas (struct Plus_head *Plus)
	Free Plus->Area structure. More...

void	dig_free_plus_isles (struct Plus_head *Plus)
	Free Plus->Isle structure. More...

void	dig_free_plus (struct Plus_head *Plus)
	Free Plus structure. More...

int	dig_load_plus (struct Plus_head Plus, struct gvfile plus, int head_only)
	Reads topo file to topo structure. More...

int	dig_write_plus_file (struct gvfile fp_plus, struct Plus_head Plus)
	Writes topo structure to topo file. More...

int	dig_write_nodes (struct gvfile plus, struct Plus_head Plus)
	Writes topo structure (nodes) to topo file. More...

int	dig_write_lines (struct gvfile plus, struct Plus_head Plus)
	Writes topo structure (lines) to topo file. More...

int	dig_write_areas (struct gvfile plus, struct Plus_head Plus)
	Writes topo structure (areas) to topo file. More...

int	dig_write_isles (struct gvfile plus, struct Plus_head Plus)
	Writes topo structure (isles) to topo file. More...

Detailed Description

Vector library - update topo structure (lower level functions)

Lower 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: CERL (probably Dave Gerdes), Radim Blazek

Date: 2001-2006

Definition in file plus.c.

Function Documentation

◆ dig_free_plus()

void dig_free_plus ( struct Plus_head * Plus )

Free Plus structure.

Structure is not inited and dig_init_plus() should follow.

Parameters

[in] Plus pointer to Plus_head structure

Definition at line 174 of file plus.c.

References dig_cidx_free(), dig_free_plus_areas(), dig_free_plus_isles(), dig_free_plus_lines(), dig_free_plus_nodes(), dig_spidx_free(), and G_debug().

Referenced by dig_load_plus().

◆ dig_free_plus_areas()

void dig_free_plus_areas ( struct Plus_head * Plus )

Free Plus->Area structure.

Parameters

[in] Plus pointer to Plus_head structure

Definition at line 115 of file plus.c.

References Plus_head::alloc_areas, Plus_head::Area, dig_free_area(), G_debug(), G_free(), Plus_head::n_areas, and NULL.

Referenced by dig_free_plus().

◆ dig_free_plus_isles()

void dig_free_plus_isles ( struct Plus_head * Plus )

Free Plus->Isle structure.

Parameters

[in] Plus pointer to Plus_head structure

Definition at line 143 of file plus.c.

References Plus_head::alloc_isles, dig_free_isle(), G_debug(), G_free(), Plus_head::Isle, Plus_head::n_isles, and NULL.

Referenced by dig_free_plus().

◆ dig_free_plus_lines()

void dig_free_plus_lines ( struct Plus_head * Plus )

Free Plus->Line structure.

Parameters

[in] Plus pointer to Plus_head structure

Definition at line 79 of file plus.c.

References Plus_head::alloc_lines, dig_free_line(), G_debug(), G_free(), Plus_head::Line, Plus_head::n_blines, Plus_head::n_clines, Plus_head::n_flines, Plus_head::n_klines, Plus_head::n_lines, Plus_head::n_llines, Plus_head::n_plines, and NULL.

Referenced by dig_free_plus().

◆ dig_free_plus_nodes()

void dig_free_plus_nodes ( struct Plus_head * Plus )

Free Plus->Node structure.

Parameters

[in] Plus pointer to Plus_head structure

Definition at line 51 of file plus.c.

References Plus_head::alloc_nodes, dig_free_node(), G_debug(), G_free(), Plus_head::n_nodes, Plus_head::Node, and NULL.

Referenced by dig_free_plus().

◆ dig_init_plus()

int dig_init_plus ( struct Plus_head * Plus )

Initialize Plus_head structure.

Parameters

[in,out] Plus pointer to Plus_head structure

Returns: 1

Definition at line 31 of file plus.c.

References Plus_head::built, dig_cidx_init(), dig_spidx_init(), G_debug(), G_zero(), and GV_BUILD_NONE.

Referenced by dig_load_plus().

◆ dig_load_plus()

int dig_load_plus	(	struct Plus_head *	Plus,
		struct gvfile *	plus,
		int	head_only
	)

Reads topo file to topo structure.

Parameters

[in,out]	Plus	pointer to Plus_head structure
[in]	plus	topo file
[in]	head_only	read only head

Returns: 1 on success; 0 on error

Definition at line 196 of file plus.c.

References _, Plus_head::Area_offset, dig_alloc_areas(), dig_alloc_isles(), dig_alloc_lines(), dig_alloc_nodes(), dig_free_plus(), dig_fseek(), dig_init_plus(), dig_Rd_P_area(), dig_Rd_P_isle(), dig_Rd_P_line(), dig_Rd_P_node(), dig_Rd_Plus_head(), dig_set_cur_port(), G_debug(), G_fatal_error(), Plus_head::Isle_offset, Plus_head::Line_offset, Plus_head::n_areas, Plus_head::n_isles, Plus_head::n_lines, Plus_head::n_nodes, Plus_head::Node_offset, and Plus_head::port.

Referenced by Vect_open_topo().

◆ dig_write_areas()

int dig_write_areas	(	struct gvfile *	plus,
		struct Plus_head *	Plus
	)

Writes topo structure (areas) to topo file.

Parameters

[in,out]	plus	topo file
[in]	Plus	pointer to Plus_head structure

Returns: 0 on success; -1 on error

Definition at line 371 of file plus.c.

References Plus_head::Area_offset, dig_ftell(), dig_Wr_P_area(), and Plus_head::n_areas.

Referenced by dig_write_plus_file().

◆ dig_write_isles()

int dig_write_isles	(	struct gvfile *	plus,
		struct Plus_head *	Plus
	)

Writes topo structure (isles) to topo file.

Parameters

[in,out]	plus	topo file
[in]	Plus	pointer to Plus_head structure

Returns: 0 on success; -1 on error

Definition at line 396 of file plus.c.

References dig_ftell(), dig_Wr_P_isle(), Plus_head::Isle_offset, and Plus_head::n_isles.

Referenced by dig_write_plus_file().

◆ dig_write_lines()

int dig_write_lines	(	struct gvfile *	plus,
		struct Plus_head *	Plus
	)

Writes topo structure (lines) to topo file.

Parameters

[in,out]	plus	topo file
[in]	Plus	pointer to Plus_head structure

Returns: 0 on success; -1 on error

Definition at line 346 of file plus.c.

References dig_ftell(), dig_Wr_P_line(), Plus_head::Line_offset, and Plus_head::n_lines.

Referenced by dig_write_plus_file().

◆ dig_write_nodes()

int dig_write_nodes	(	struct gvfile *	plus,
		struct Plus_head *	Plus
	)

Writes topo structure (nodes) to topo file.

Parameters

[in,out]	plus	topo file
[in]	Plus	pointer to Plus_head structure

Returns: 0 on success; -1 on error

Definition at line 322 of file plus.c.

References dig_ftell(), dig_Wr_P_node(), Plus_head::n_nodes, and Plus_head::Node_offset.

Referenced by dig_write_plus_file().

◆ dig_write_plus_file()

int dig_write_plus_file	(	struct gvfile *	fp_plus,
		struct Plus_head *	Plus
	)

Writes topo structure to topo file.

Parameters

[in,out]	fp_plus	topo file
[in]	Plus	pointer to Plus_head structure

Returns: 0 on success; -1 on error

Definition at line 272 of file plus.c.

References _, dig_fflush(), dig_rewind(), dig_set_cur_port(), dig_Wr_Plus_head(), dig_write_areas(), dig_write_isles(), dig_write_lines(), dig_write_nodes(), G_warning(), and Plus_head::port.

Referenced by Vect_save_topo().

lib
vector
diglib
plus.c
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