mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-30 04:41:49 +00:00
3c327ac2d0
Summary: Closes https://github.com/facebook/rocksdb/pull/2589 Differential Revision: D5431502 Pulled By: siying fbshipit-source-id: 8ebf8c87883daa9daa54b2303d11ce01ab1f6f75
36 lines
1 KiB
C++
36 lines
1 KiB
C++
// 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).
|
|
//
|
|
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
//
|
|
// Simple hash function used for internal data structures
|
|
|
|
#pragma once
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include "rocksdb/slice.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
extern uint32_t Hash(const char* data, size_t n, uint32_t seed);
|
|
|
|
inline uint32_t BloomHash(const Slice& key) {
|
|
return Hash(key.data(), key.size(), 0xbc9f1d34);
|
|
}
|
|
|
|
inline uint32_t GetSliceHash(const Slice& s) {
|
|
return Hash(s.data(), s.size(), 397);
|
|
}
|
|
|
|
// std::hash compatible interface.
|
|
struct SliceHasher {
|
|
uint32_t operator()(const Slice& s) const { return GetSliceHash(s); }
|
|
};
|
|
|
|
} // namespace rocksdb
|