Source/WebCore/platform/UUID.h - external/Webkit - Git at Google

 /*
 * Copyright (C) 2010 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
  *     * 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.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * 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 UUID_h
 #define UUID_h

 #include <wtf/text/WTFString.h>

 namespace WebCore {

 // Creates a UUID that consists of 32 hexadecimal digits and returns its canonical form.
 // The canonical form is displayed in 5 groups separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters.
 // The hexadecimal values "a" through "f" are output as lower case characters.
 //
 // Note: for security reason, we should always generate version 4 UUID that use a scheme relying only on random numbers.
 // This algorithm sets the version number as well as two reserved bits. All other bits are set using a random or pseudorandom
 // data source. Version 4 UUIDs have the form xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx with hexadecimal digits for x and one of 8,
 // 9, A, or B for y.
 //
 // On Windows, version 4 UUIDs are used since Windows 2000 (http://msdn.microsoft.com/en-us/library/aa446557.aspx).
 // On MacOSX, version 4 UUIDs are used since Tiger (http://developer.apple.com/mac/library/technotes/tn/tn1103.html#TNTAG8).
 // On Linux, the kernel offers the procfs pseudo-file /proc/sys/kernel/random/uuid that yields version 4 UUIDs (http://hbfs.wordpress.com/2008/09/30/ueid-unique-enough-ids/).
 String createCanonicalUUIDString();

 }

 #endif
	/*
	* Copyright (C) 2010 Google Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are
	* met:
	*
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * 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.
	* * Neither the name of Google Inc. nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* 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 UUID_h
	#define UUID_h

	#include <wtf/text/WTFString.h>

	namespace WebCore {

	// Creates a UUID that consists of 32 hexadecimal digits and returns its canonical form.
	// The canonical form is displayed in 5 groups separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters.
	// The hexadecimal values "a" through "f" are output as lower case characters.
	//
	// Note: for security reason, we should always generate version 4 UUID that use a scheme relying only on random numbers.
	// This algorithm sets the version number as well as two reserved bits. All other bits are set using a random or pseudorandom
	// data source. Version 4 UUIDs have the form xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx with hexadecimal digits for x and one of 8,
	// 9, A, or B for y.
	//
	// On Windows, version 4 UUIDs are used since Windows 2000 (http://msdn.microsoft.com/en-us/library/aa446557.aspx).
	// On MacOSX, version 4 UUIDs are used since Tiger (http://developer.apple.com/mac/library/technotes/tn/tn1103.html#TNTAG8).
	// On Linux, the kernel offers the procfs pseudo-file /proc/sys/kernel/random/uuid that yields version 4 UUIDs (http://hbfs.wordpress.com/2008/09/30/ueid-unique-enough-ids/).
	String createCanonicalUUIDString();

	}

	#endif