forked from OSchip/llvm-project
44 lines
1.0 KiB
C++
44 lines
1.0 KiB
C++
//===-- sanitizer_common.h --------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements a simple hash function.
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//===----------------------------------------------------------------------===//
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#ifndef SANITIZER_HASH_H
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#define SANITIZER_HASH_H
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#include "sanitizer_internal_defs.h"
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namespace __sanitizer {
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class MurMur2HashBuilder {
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static const u32 m = 0x5bd1e995;
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static const u32 seed = 0x9747b28c;
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static const u32 r = 24;
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u32 h;
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public:
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explicit MurMur2HashBuilder(u32 init = 0) { h = seed ^ init; }
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void add(u32 k) {
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k *= m;
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k ^= k >> r;
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k *= m;
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h *= m;
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h ^= k;
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}
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u32 get() {
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u32 x = h;
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x ^= x >> 13;
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x *= m;
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x ^= x >> 15;
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return x;
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}
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};
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} //namespace __sanitizer
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#endif // SANITIZER_HASH_H
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