[ceph.git] / ceph / src / rocksdb / util / hash128.h

//  Copyright (c) Facebook, Inc. and its affiliates. 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).

#pragma once

// 128-bit hash gets it own header so that more popular hash.h doesn't
// depend on math128.h

#include "rocksdb/slice.h"
#include "util/math128.h"

namespace ROCKSDB_NAMESPACE {

// Stable/persistent 128-bit hash for non-cryptographic applications.
Unsigned128 Hash128(const char* data, size_t n, uint64_t seed);

// Specific optimization without seed (same as seed = 0)
Unsigned128 Hash128(const char* data, size_t n);

inline Unsigned128 GetSliceHash128(const Slice& key) {
  return Hash128(key.data(), key.size());
}

}  // namespace ROCKSDB_NAMESPACE
Commit	Line	Data
1e59de90 TL	1	// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
	2	// This source code is licensed under both the GPLv2 (found in the
	3	// COPYING file in the root directory) and Apache 2.0 License
	4	// (found in the LICENSE.Apache file in the root directory).
	5
	6	#pragma once
	7
	8	// 128-bit hash gets it own header so that more popular hash.h doesn't
	9	// depend on math128.h
	10
	11	#include "rocksdb/slice.h"
	12	#include "util/math128.h"
	13
	14	namespace ROCKSDB_NAMESPACE {
	15
	16	// Stable/persistent 128-bit hash for non-cryptographic applications.
	17	Unsigned128 Hash128(const char* data, size_t n, uint64_t seed);
	18
	19	// Specific optimization without seed (same as seed = 0)
	20	Unsigned128 Hash128(const char* data, size_t n);
	21
	22	inline Unsigned128 GetSliceHash128(const Slice& key) {
	23	return Hash128(key.data(), key.size());
	24	}
	25
	26	} // namespace ROCKSDB_NAMESPACE