A Discrete-Event Network Simulator
API
hash-murmur3.h
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2012 Lawrence Livermore National Laboratory
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * Author: Peter D. Barnes, Jr. <pdbarnes@llnl.gov>
19  */
20 
21 #ifndef HASH_MURMUR3_H
22 #define HASH_MURMUR3_H
23 
24 #include "hash-function.h"
25 
32 namespace ns3 {
33 
34 namespace Hash {
35 
36 namespace Function {
37 
53 class Murmur3 : public Implementation
54 {
55 public:
59  Murmur3 ();
74  uint32_t GetHash32 (const char * buffer, const std::size_t size);
89  uint64_t GetHash64 (const char * buffer, const std::size_t size);
93  virtual void clear (void);
94 
95 private:
102  enum seed
103  {
104  SEED = 0x8BADF00D // Ate bad food
105  };
111  uint32_t m_hash32;
112  std::size_t m_size32;
117  uint64_t m_hash64[2];
118  std::size_t m_size64;
121 }; // class Murmur3
122 
123 } // namespace Function
124 
125 } // namespace Hash
126 
127 } // namespace ns3
128 
129 #endif /* HASH_MURMUR3_H */
hash-function.h
ns3::Hash::Implementation, ns3::Hash::Function::Hash32 and ns3::Hash::Function::Hash64 declarations...
ns3::Hash::Function::Murmur3::clear
virtual void clear(void)
Restore initial state.
Definition: hash-murmur3.cc:572
ns3::Hash::Implementation
Hash function implementation base class.
Definition: hash-function.h:47
ns3
Every class exported by the ns3 library is enclosed in the ns3 namespace.
ns3::Hash::Function::Murmur3::GetHash64
uint64_t GetHash64(const char *buffer, const std::size_t size)
Compute 64-bit hash of a byte buffer.
Definition: hash-murmur3.cc:542
ns3::Hash::Function::Murmur3::GetHash32
uint32_t GetHash32(const char *buffer, const std::size_t size)
Compute 32-bit hash of a byte buffer.
Definition: hash-murmur3.cc:528
ns3::Hash::Function::Murmur3::m_size64
std::size_t m_size64
murmur3 produces 128-bit hash and state; we use just the first 64-bits.
Definition: hash-murmur3.h:118
ns3::Hash::Function::Murmur3
Murmur3 hash function implementation.
Definition: hash-murmur3.h:53
ns3::Hash::Function::Murmur3::Murmur3
Murmur3()
Constructor, clears internal state.
Definition: hash-murmur3.cc:522
ns3::Hash::Function::Murmur3::m_size32
std::size_t m_size32
Cache last hash value, and total bytes hashed (needed to finalize), for incremental hashing...
Definition: hash-murmur3.h:112
ns3::Hash::Function::Murmur3::m_hash32
uint32_t m_hash32
Cache last hash value, and total bytes hashed (needed to finalize), for incremental hashing...
Definition: hash-murmur3.h:111
ns3::Hash::Function::Murmur3::m_hash64
uint64_t m_hash64[2]
murmur3 produces 128-bit hash and state; we use just the first 64-bits.
Definition: hash-murmur3.h:117