| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| //----------------------------------------------------------------------------- |
| // The original MurmurHash3 was written by Austin Appleby, and is placed in the |
| // public domain. This source code, implemented by Licht Takeuchi, is based on |
| // the orignal MurmurHash3 source code. |
| #ifndef MURMUR3_32_HASH_HPP_ |
| #define MURMUR3_32_HASH_HPP_ |
| |
| #include <pulsar/defines.h> |
| #include "Hash.h" |
| |
| #include <cstdint> |
| #include <string> |
| |
| namespace pulsar { |
| |
| class PULSAR_PUBLIC Murmur3_32Hash : public Hash { |
| public: |
| Murmur3_32Hash(); |
| |
| int32_t makeHash(const std::string& key); |
| |
| private: |
| uint32_t seed; |
| |
| static uint32_t fmix(uint32_t h); |
| static uint32_t mixK1(uint32_t k1); |
| static uint32_t mixH1(uint32_t h1, uint32_t k1); |
| static uint32_t rotate_left(uint32_t x, uint8_t r); |
| uint32_t makeHash(const void* key, const int64_t len); |
| }; |
| } // namespace pulsar |
| |
| #endif /* MURMUR3_32_HASH_HPP_ */ |