key_value4.c File Reference

Key_Value management. More...

#include <grass/gis.h>
#include <string.h>

Include dependency graph for key_value4.c:

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Functions
int	G_update_key_value_file (const char *file, const char *key, const char *value)
	Update file, set up value for given key.
int	G_lookup_key_value_from_file (const char *file, const char *key, char value[], int n)
	Look up for key in file.

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Detailed Description

Key_Value management.

(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:

CERL

Definition in file key_value4.c.

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Function Documentation

int G_lookup_key_value_from_file	(	const char *	file,
		const char *	key,
		char	value[],
		int	n
	)

Look up for key in file.

Parameters:

[in]	file	filename
[in]	key	key to be found in file
[out]	value	value for key
[in]	n	number of characters to be copied

Returns:

<0 are file/memory errors

0 not found

1 ok

Definition at line 64 of file key_value4.c.

References G_find_key_value(), G_free_key_value(), and G_read_key_value_file().

int G_update_key_value_file	(	const char *	file,
		const char *	key,
		const char *	value
	)

Update file, set up value for given key.

Parameters:

[in]	file	filename to be updated
[in]	key	key value
[in]	value	value to be updated

Returns:

-1 can't open file for reading

-2 no memory for key,value info, file not modified

-3 can't open file for re-write

-4 error writing the file (might be damaged)

Definition at line 31 of file key_value4.c.

References G_free_key_value(), G_read_key_value_file(), G_set_key_value(), and G_write_key_value_file().