uuidgenerator.h

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// UUIDGenerator.h
//
// $Id: //poco/Main/Foundation/include/Foundation/UUIDGenerator.h#5 $
//
// Definition of the UUIDGenerator class.
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#ifndef Foundation_UUIDGenerator_INCLUDED
#define Foundation_UUIDGenerator_INCLUDED


#ifndef Foundation_Foundation_INCLUDED
#include "Foundation/Foundation.h"
#endif
#ifndef Foundation_UUID_INCLUDED
#include "Foundation/UUID.h"
#endif
#ifndef Foundation_Mutex_INCLUDED
#include "Foundation/Mutex.h"
#endif
#ifndef Foundation_Random_INCLUDED
#include "Foundation/Random.h"
#endif
#ifndef Foundation_Timestamp_INCLUDED
#include "Foundation/Timestamp.h"
#endif


Foundation_BEGIN


class DigestEngine;


class Foundation_API UUIDGenerator
	/// This class implements a generator for Universal Unique Identifiers,
	/// as specified in Appendix A of the DCE 1.1 Remote Procedure
	/// Call Specification (http://www.opengroup.org/onlinepubs/9629399/),
	/// RFC 2518 (WebDAV), section 6.4.1 and the UUIDs and GUIDs internet
	/// draft by Leach/Salz from February, 1998 
	/// (http://ftp.ics.uci.edu/pub/ietf/webdav/uuid-guid/draft-leach-uuids-guids-01.txt)
{
public:
	UUIDGenerator();
		/// Creates the UUIDGenerator.

	~UUIDGenerator();
		/// Destroys the UUIDGenerator.

	UUID create();
		/// Creates a new time-based UUID.
		
	UUID createFromName(const UUID& nsid, const std::string& name);
		/// Creates a name-based UUID.

	UUID createFromName(const UUID& nsid, const std::string& name, DigestEngine& de);
		/// Creates a name-based UUID, using the given digest engine.
		
	UUID createRandom();
		/// Creates a random UUID.

	static UUIDGenerator& defaultGenerator();
		/// Returns a reference to the default UUIDGenerator.
		
protected:
	Timestamp::UtcTimeVal timeStamp();
	void getNode();

private:
	FastMutex _mutex;
	Random    _random;
	Timestamp _lastTime;
	int       _ticks;
	UInt8     _node[6];
	bool      _haveNode;
	
	UUIDGenerator(const UUIDGenerator&);
	UUIDGenerator& operator = (const UUIDGenerator&);
};


Foundation_END


#endif // Foundation_UUIDGenerator_INCLUDED