uuid.h

/* Copyright (c) 2006-2011, Stefan Eilemann <eile@equalizergraphics.com> 
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 2.1 as published
 * by the Free Software Foundation.
 *  
 * This library 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 Lesser General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef COBASE_UUID_H
#define COBASE_UUID_H

#include <co/base/rng.h>     // used in inline method
#include <co/base/uint128_t.h> // base class

namespace co
{
namespace base
{

    class UUID : public uint128_t
    {
    public:
        explicit UUID( const bool generate = false ) : uint128_t()
            { 
                while( generate && high() == 0 )
                {         
                    RNG rng;
                    high() = rng.get< uint64_t >();
                    low() = rng.get< uint64_t >();
                }
            }

        UUID( const uint64_t high_, const uint64_t low_ ) 
            : uint128_t( high_, low_ ) {}

        UUID( const uint128_t& from ) : uint128_t( from ) {}

        UUID& operator = ( const std::string& from )
            { *(static_cast< uint128_t* >( this )) = from; return *this; }

        bool isGenerated() const { return high() != 0; }
    };
}
}

#endif // COBASE_UUID_H