Subversion Repositories Applications.papyrus

if(!dojo._hasResource["dojox.uuid.generateRandomUuid"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.

dojo._hasResource["dojox.uuid.generateRandomUuid"] = true;

dojo.provide("dojox.uuid.generateRandomUuid");

dojox.uuid.generateRandomUuid = function(){

	// summary:

	//		This function generates random UUIDs, meaning "version 4" UUIDs.

	// description:

	//		A typical generated value would be something like this:

	//		"3b12f1df-5232-4804-897e-917bf397618a"

	//

	//		For more information about random UUIDs, see sections 4.4 and

	//		4.5 of RFC 4122: http://tools.ietf.org/html/rfc4122#section-4.4

	//

	//		This generator function is designed to be small and fast,

	//		but not necessarily good.

	//

	//		Small: This generator has a small footprint. Once comments are

	//		stripped, it's only about 25 lines of code, and it doesn't

	//		dojo.require() any other modules.

	//

	//		Fast: This generator can generate lots of new UUIDs fairly quickly

	//		(at least, more quickly than the other dojo UUID generators).

	//

	//		Not necessarily good: We use Math.random() as our source

	//		of randomness, which may or may not provide much randomness.

	// examples:

	//		var string = dojox.uuid.generateRandomUuid();

	var HEX_RADIX = 16;

	function _generateRandomEightCharacterHexString(){

		// Make random32bitNumber be a randomly generated floating point number

		// between 0 and (4,294,967,296 - 1), inclusive.

		var random32bitNumber = Math.floor( (Math.random() % 1) * Math.pow(2, 32) );

		var eightCharacterHexString = random32bitNumber.toString(HEX_RADIX);

		while(eightCharacterHexString.length < 8){

			eightCharacterHexString = "0" + eightCharacterHexString;

		}

		return eightCharacterHexString; // for example: "3B12F1DF"

	}

	var hyphen = "-";

	var versionCodeForRandomlyGeneratedUuids = "4"; // 8 == binary2hex("0100")

	var variantCodeForDCEUuids = "8"; // 8 == binary2hex("1000")

	var a = _generateRandomEightCharacterHexString();

	var b = _generateRandomEightCharacterHexString();

	b = b.substring(0, 4) + hyphen + versionCodeForRandomlyGeneratedUuids + b.substring(5, 8);

	var c = _generateRandomEightCharacterHexString();

	c = variantCodeForDCEUuids + c.substring(1, 4) + hyphen + c.substring(4, 8);

	var d = _generateRandomEightCharacterHexString();

	var returnValue = a + hyphen + b + hyphen + c + d;

	returnValue = returnValue.toLowerCase();

	return returnValue; // String

};

}