libcruft-util/hash/murmur/murmur2.hpp

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/*
* 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.
*
* Copyright 2015 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __UTIL_HASH_MURMUR_MURMUR2_HPP
#define __UTIL_HASH_MURMUR_MURMUR2_HPP
#include <cstddef>
#include <cstdint>
// Austin Appleby's MumurHash2, and MurmurHash64A. The exhaustive list of
// variants is deliberately not provided. You can damn well align your data or
// fix the algorithm.
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namespace util::hash::murmur2 {
constexpr uint32_t mix (uint32_t, uint32_t);
constexpr uint64_t mix (uint64_t, uint64_t);
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uint32_t hash_32 (const void *restrict data, size_t len, uint32_t seed);
uint64_t hash_64 (const void *restrict data, size_t len, uint64_t seed);
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}
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#include "murmur2.ipp"
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#endif