hash.h

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/*
 * Copyright (c) 2012 Lawrence Livermore National Laboratory
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Peter D. Barnes, Jr. <pdbarnes@llnl.gov>
 */
 
#ifndef HASH_H
#define HASH_H
 
#include "assert.h"
#include "hash-fnv.h"
#include "hash-function.h"
#include "hash-murmur3.h"
#include "ptr.h"
 
#include <string>
 
namespace ns3
{
 
class Hasher
{
  public:
    Hasher();
    Hasher(Ptr<Hash::Implementation> hp);
    uint32_t GetHash32(const char* buffer, const std::size_t size);
    uint64_t GetHash64(const char* buffer, const std::size_t size);
 
    uint32_t GetHash32(const std::string s);
    uint64_t GetHash64(const std::string s);
    Hasher& clear();
 
  private:
    Ptr<Hash::Implementation> m_impl; 
};                                    // Hasher
 
/*************************************************
 **  Global functions declarations
 ************************************************/
 
uint32_t Hash32(const char* buffer, const std::size_t size);
uint64_t Hash64(const char* buffer, const std::size_t size);
 
uint32_t Hash32(const std::string s);
uint64_t Hash64(const std::string s);
 
} // namespace ns3
 
/*************************************************
 **  Inline implementations for rvo
 ************************************************/
 
namespace ns3
{
 
/*************************************************
 class Hasher implementation, inlined for rvo
*/
 
inline uint32_t
Hasher::GetHash32(const char* buffer, const std::size_t size)
{
    NS_ASSERT(m_impl);
    return m_impl->GetHash32(buffer, size);
}
 
inline uint64_t
Hasher::GetHash64(const char* buffer, const std::size_t size)
{
    NS_ASSERT(m_impl);
    return m_impl->GetHash64(buffer, size);
}
 
inline uint32_t
Hasher::GetHash32(const std::string s)
{
    NS_ASSERT(m_impl);
    return m_impl->GetHash32(s.c_str(), s.size());
}
 
inline uint64_t
Hasher::GetHash64(const std::string s)
{
    NS_ASSERT(m_impl);
    return m_impl->GetHash64(s.c_str(), s.size());
}
 
/*************************************************
  Global hash functions, inlined for rvo
*/
 
Hasher& GetStaticHash();
 
inline uint32_t
Hash32(const char* buffer, const std::size_t size)
{
    return GetStaticHash().GetHash32(buffer, size);
}
 
inline uint64_t
Hash64(const char* buffer, const std::size_t size)
{
    return GetStaticHash().GetHash64(buffer, size);
}
 
inline uint32_t
Hash32(const std::string s)
{
    return GetStaticHash().GetHash32(s);
}
 
inline uint64_t
Hash64(const std::string s)
{
    return GetStaticHash().GetHash64(s);
}
 
} // namespace ns3
 
#endif /* HASH_H */