41 lines
1.0 KiB
C++
41 lines
1.0 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2016-2018 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef CRUFT_UTIL_HASH_XXHASH_HPP
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#define CRUFT_UTIL_HASH_XXHASH_HPP
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#include "../view.hpp"
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#include <cstdint>
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#include <type_traits>
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namespace cruft::hash {
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template <typename WordT>
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class xxhash {
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public:
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static_assert (std::is_same<WordT,std::uint32_t>::value || std::is_same<WordT,std::uint64_t>::value);
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using digest_t = WordT;
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using word_t = WordT;
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static constexpr int block_bytes = 4 * sizeof (word_t);
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static constexpr word_t DEFAULT_SEED = 0;
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xxhash (word_t seed = DEFAULT_SEED);
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digest_t operator() (const cruft::view<const uint8_t*> data);
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private:
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word_t m_seed;
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};
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using xxhash32 = xxhash<uint32_t>;
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using xxhash64 = xxhash<uint64_t>;
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}
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#endif
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