Vector library (diglib) - file management. More...

#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <grass/gis.h>
#include <grass/Vect.h>
#include <grass/glocale.h>

Include dependency graph for file.c:

Go to the source code of this file.

Functions
long	dig_ftell (GVFILE *file)
	Get GVFILE position. More...

int	dig_fseek (GVFILE *file, long offset, int whence)
	Set GVFILE position. More...

void	dig_rewind (GVFILE *file)
	Rewind GVFILE position. More...

int	dig_fflush (GVFILE *file)
	Flush GVFILE. More...

size_t	dig_fread (void ptr, size_t size, size_t nmemb, GVFILE file)
	Read GVFILE. More...

size_t	dig_fwrite (void ptr, size_t size, size_t nmemb, GVFILE file)
	Write GVFILE. More...

void	dig_file_init (GVFILE *file)
	Initialize GVFILE. More...

int	dig_file_load (GVFILE *file)
	Load opened GVFILE to memory. More...

void	dig_file_free (GVFILE *file)
	Free GVFILE. More...

Detailed Description

Vector library (diglib) - file management.

Lower level functions for reading/writing/manipulating vectors.

Note: seems that the time is almost the same for both cases:

reading from file
load whole file to memory and read from memory

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

Author: Dave Gerdes, Radim Blazek

Definition in file file.c.

Function Documentation

int dig_fflush ( GVFILE * file )

Flush GVFILE.

Parameters

file	pointer to GVFILE structure

Returns: 0

Definition at line 102 of file file.c.

Referenced by dig_write_plus_file(), main(), V1__rewrite_line_nat(), V1_delete_line_nat(), and V1_restore_line_nat().

void dig_file_free ( GVFILE * file )

Free GVFILE.

Parameters

file	pointer to GVFILE structure

Definition at line 269 of file file.c.

References G_free().

Referenced by V1_close_nat().

void dig_file_init ( GVFILE * file )

Initialize GVFILE.

Parameters

[out] file pointer to GVFILE structure

Definition at line 168 of file file.c.

References NULL.

Referenced by V1_open_new_nat(), V1_open_old_nat(), V2_close_ogr(), V2_open_old_ogr(), Vect_cidx_open(), Vect_cidx_save(), Vect_open_spatial_index(), Vect_open_topo(), Vect_save_spatial_index(), and Vect_save_topo().

int dig_file_load ( GVFILE * file )

Load opened GVFILE to memory.

Warning: position in file is set to the beginning.

Parameters

file	pointer to GVFILE structure

Returns: 1 loaded; 0 not loaded; -1 error

Definition at line 190 of file file.c.

References G__getenv(), G_debug(), G_free(), G_strcasecmp(), G_warning(), tools::mode, NULL, tools::size, and stat.

Referenced by V1_open_old_nat().

size_t dig_fread	(	void *	ptr,
		size_t	size,
		size_t	nmemb,
		GVFILE *	file
	)

Read GVFILE.

Parameters

[out]	ptr	data buffer
	size	buffer size
	nmemb	number of members
	file	pointer to GVFILE structure

Returns: number of read members

Definition at line 122 of file file.c.

References int.

Referenced by dig__fread_port_C(), dig__fread_port_D(), dig__fread_port_F(), dig__fread_port_I(), dig__fread_port_L(), and dig__fread_port_S().

int dig_fseek	(	GVFILE *	file,
		long	offset,
		int	whence
	)

Set GVFILE position.

Start positions:

SEEK_SET (start)
SEEK_CUR (current position)
SEEK_END (end)

Parameters

file	pointer to GVFILE structure
offset	offset position
whence	start position

Returns: 0 OK; -1 error

Definition at line 60 of file file.c.

Referenced by dig__read_head(), dig__write_head(), dig_load_plus(), dig_Rd_Plus_head(), dig_Rd_spindx_head(), dig_read_cidx(), dig_read_cidx_head(), dig_read_spidx(), main(), V1__rewrite_line_nat(), V1_delete_line_nat(), V1_restore_line_nat(), V1_rewind_nat(), V1_rewrite_line_nat(), V1_write_line_nat(), and Vect_coor_info().

long dig_ftell ( GVFILE * file )

Get GVFILE position.

Parameters

file	pointer to GVFILE structure

Returns: current file position

Definition at line 36 of file file.c.

Referenced by dig__write_head(), dig_Wr_Plus_head(), dig_Wr_spindx_head(), dig_write_areas(), dig_write_cidx(), dig_write_cidx_head(), dig_write_isles(), dig_write_lines(), dig_write_nodes(), dig_write_spidx(), V1_read_next_line_nat(), V1_rewrite_line_nat(), V1_write_line_nat(), and Vect_coor_info().

size_t dig_fwrite	(	void *	ptr,
		size_t	size,
		size_t	nmemb,
		GVFILE *	file
	)

Write GVFILE.

Parameters

	ptr	data buffer
	size	buffer size
	nmemb	number of members
[out]	file	pointer to GVFILE structure

Returns: number of items written

Definition at line 154 of file file.c.

References G_fatal_error().

Referenced by dig__fwrite_port_C(), dig__fwrite_port_D(), dig__fwrite_port_F(), dig__fwrite_port_I(), dig__fwrite_port_L(), and dig__fwrite_port_S().

void dig_rewind ( GVFILE * file )

Rewind GVFILE position.

Parameters

file	pointer to GVFILE structure

Definition at line 85 of file file.c.

Referenced by dig_Rd_Plus_head(), dig_Rd_spindx_head(), dig_read_cidx(), dig_read_cidx_head(), dig_read_spidx(), dig_Wr_Plus_head(), dig_Wr_spindx_head(), dig_write_cidx(), dig_write_cidx_head(), dig_write_plus_file(), and dig_write_spidx().

Functions

Detailed Description

Function Documentation