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1 /*
2  * Copyright (C) 2012 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef LATINIME_BLOOM_FILTER_H
18 #define LATINIME_BLOOM_FILTER_H
19 
20 #include <stdint.h>
21 
22 #include "defines.h"
23 
24 namespace latinime {
25 
setInFilter(uint8_t * filter,const int position)26 static inline void setInFilter(uint8_t *filter, const int position) {
27     const unsigned int bucket = position % BIGRAM_FILTER_MODULO;
28     filter[bucket >> 3] |= (1 << (bucket & 0x7));
29 }
30 
isInFilter(const uint8_t * filter,const int position)31 static inline bool isInFilter(const uint8_t *filter, const int position) {
32     const unsigned int bucket = position % BIGRAM_FILTER_MODULO;
33     return filter[bucket >> 3] & (1 << (bucket & 0x7));
34 }
35 
36 } // namespace latinime
37 
38 #endif // LATINIME_BLOOM_FILTER_H
39