functional.c File Reference

Functional helper. More...

#include <kdb.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

Include dependency graph for functional.c:

Functions
int	elektraKsFilter (KeySet *result, KeySet *input, int(*filter)(const Key *k, void *argument), void *argument)
	return only those keys from the given keyset that pass the supplied filter function with the supplied argument More...

Detailed Description

Functional helper.

Copyright

BSD License (see doc/LICENSE.md or http://www.libelektra.org)

Function Documentation

int elektraKsFilter	(	KeySet *	result,
		KeySet *	input,
		int(*)(const Key *k, void *argument)	filter,
		void *	argument
	)

return only those keys from the given keyset that pass the supplied filter function with the supplied argument

Parameters

result	the keyset that should contain the filtered keys
input	the keyset whose keys should be filtered
filter	a function pointer to a function that will be used to filter the keyset. A key will be taken if the function returns a value greater than 0.
argument	an argument that will be passed to the filter function each time it is called

Returns

the number of filtered keys if the filter function always returned a positive value, -1 otherwise

Return values

NULL	on NULL pointer