75 lines
2.7 KiB
C++
75 lines
2.7 KiB
C++
/*
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xxHash - Extremely Fast Hash algorithm
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Header File
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Copyright (C) 2012-2016, Yann Collet.
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BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following disclaimer
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in the documentation and/or other materials provided with the
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distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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You can contact the author at :
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- xxHash source repository : https://github.com/Cyan4973/xxHash
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*/
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#ifndef LLVM_SUPPORT_XXHASH_H
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#define LLVM_SUPPORT_XXHASH_H
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#include "llvm/Support/Compiler.h"
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#include <cstddef>
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#include <cstdint>
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namespace llvm {
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/// XXH3's 64-bit variant. Inline ArrayRef and StringRef overloads live in
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/// llvm/ADT/ArrayRef.h and llvm/ADT/StringRef.h.
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LLVM_ABI uint64_t xxh3_64bits(const uint8_t *data, size_t len);
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/*-**********************************************************************
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* XXH3 128-bit variant
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************************************************************************/
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/*!
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* @brief The return value from 128-bit hashes.
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*
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* Stored in little endian order, although the fields themselves are in native
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* endianness.
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*/
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struct XXH128_hash_t {
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uint64_t low64; /*!< `value & 0xFFFFFFFFFFFFFFFF` */
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uint64_t high64; /*!< `value >> 64` */
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/// Convenience equality check operator.
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bool operator==(const XXH128_hash_t rhs) const {
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return low64 == rhs.low64 && high64 == rhs.high64;
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}
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};
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/// XXH3's 128-bit variant. Inline ArrayRef overload lives in
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/// llvm/ADT/ArrayRef.h.
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LLVM_ABI XXH128_hash_t xxh3_128bits(const uint8_t *data, size_t len);
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} // namespace llvm
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#endif
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