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
24namespace latinime {
25
26// TODO: uint32_t position
27static inline void setInFilter(uint8_t *filter, const int32_t position) {
28    const uint32_t bucket = static_cast<uint32_t>(position % BIGRAM_FILTER_MODULO);
29    filter[bucket >> 3] |= static_cast<uint8_t>(1 << (bucket & 0x7));
30}
31
32// TODO: uint32_t position
33static inline bool isInFilter(const uint8_t *filter, const int32_t position) {
34    const uint32_t bucket = static_cast<uint32_t>(position % BIGRAM_FILTER_MODULO);
35    return filter[bucket >> 3] & static_cast<uint8_t>(1 << (bucket & 0x7));
36}
37} // namespace latinime
38#endif // LATINIME_BLOOM_FILTER_H
39