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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
/*
Murmurhash from http://sites.google.com/site/murmurhash/
All code is released to the public domain. For business purposes, Murmurhash
is under the MIT license.
*/
#pragma once
#include <stdint.h>
#include "rocksdb/slice.h"
#if defined(__x86_64__)
#define MURMUR_HASH MurmurHash64A
uint64_t MurmurHash64A(const void* key, int len, unsigned int seed);
#define MurmurHash MurmurHash64A
using murmur_t = uint64_t;
#elif defined(__i386__)
#define MURMUR_HASH MurmurHash2
unsigned int MurmurHash2(const void* key, int len, unsigned int seed);
#define MurmurHash MurmurHash2
using murmur_t = unsigned int;
#else
#define MURMUR_HASH MurmurHashNeutral2
unsigned int MurmurHashNeutral2(const void* key, int len, unsigned int seed);
#define MurmurHash MurmurHashNeutral2
using murmur_t = unsigned int;
#endif
// Allow slice to be hashable by murmur hash.
namespace ROCKSDB_NAMESPACE {
struct murmur_hash {
size_t operator()(const Slice& slice) const {
return MurmurHash(slice.data(), static_cast<int>(slice.size()), 0);
}
};
} // namespace ROCKSDB_NAMESPACE
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