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 26 // TODO: uint32_t position 27 static 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 33 static 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
