Elektra  0.8.19
Functions
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.

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
resultthe keyset that should contain the filtered keys
inputthe keyset whose keys should be filtered
filtera 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.
argumentan 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
NULLon NULL pointer