51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
|
/*
|
||
|
|
* bloomFilter.h
|
||
|
|
*
|
||
|
|
* Copyright 2010-2012 Yahoo! Inc.
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*
|
||
|
|
* Author: sears
|
||
|
|
*/
|
||
|
|
#ifndef STASIS_BLOOM_FILTER_H
|
||
|
|
#define STASIS_BLOOM_FILTER_H
|
||
|
|
|
||
|
|
#include <stasis/common.h>
|
||
|
|
|
||
|
|
BEGIN_C_DECLS
|
||
|
|
|
||
|
|
typedef struct stasis_bloom_filter_t stasis_bloom_filter_t;
|
||
|
|
|
||
|
|
/**
|
||
|
|
@return 0 if there is not enough memory, or some other error occurred; a
|
||
|
|
pointer to the new bloom filter otherwise.
|
||
|
|
*/
|
||
|
|
stasis_bloom_filter_t * stasis_bloom_filter_create(uint64_t(*hash_func_a)(const char*,int),
|
||
|
|
uint64_t(*hash_func_b)(const char*,int),
|
||
|
|
uint64_t num_expected_items,
|
||
|
|
double false_positive_rate);
|
||
|
|
|
||
|
|
void stasis_bloom_filter_destroy(stasis_bloom_filter_t*);
|
||
|
|
|
||
|
|
void stasis_bloom_filter_insert(stasis_bloom_filter_t * bf, const char* key, int len);
|
||
|
|
/**
|
||
|
|
@return 1 if the value might be in the bloom filter, 0 otherwise
|
||
|
|
*/
|
||
|
|
int stasis_bloom_filter_lookup(stasis_bloom_filter_t * bf, const char* key, int len);
|
||
|
|
|
||
|
|
void stasis_bloom_filter_print_stats(stasis_bloom_filter_t * bf);
|
||
|
|
|
||
|
|
END_C_DECLS
|
||
|
|
|
||
|
|
#endif
|