Math.uuid.js (v1.4)
/*! Math.uuid.js (v1.4) http://www.broofa.com mailto:[email protected] Copyright (c) 2010 Robert Kieffer Dual licensed under the MIT and GPL licenses. */ /* * Generate a random uuid. * * USAGE: Math.uuid(length, radix) * length - the desired number of characters * radix - the number of allowable values for each character. * * EXAMPLES: * // No arguments - returns RFC4122, version 4 ID * >>> Math.uuid() * "92329D39-6F5C-4520-ABFC-AAB64544E172" * * // One argument - returns ID of the specified length * >>> Math.uuid(15) // 15 character ID (default base=62) * "VcydxgltxrVZSTV" * * // Two arguments - returns ID of the specified length, and radix. (Radix must be <= 62) * >>> Math.uuid(8, 2) // 8 character ID (base=2) * "01001010" * >>> Math.uuid(8, 10) // 8 character ID (base=10) * "47473046" * >>> Math.uuid(8, 16) // 8 character ID (base=16) * "098F4D35" */ (function() { // Private array of chars to use var CHARS = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split(''); Math.uuid = function (len, radix) { var chars = CHARS, uuid = [], i; radix = radix || chars.length; if (len) { // Compact form for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random()*radix]; } else { // rfc4122, version 4 form var r; // rfc4122 requires these characters uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-'; uuid[14] = '4'; // Fill in random data. At i==19 set the high bits of clock sequence as // per rfc4122, sec. 4.1.5 for (i = 0; i < 36; i++) { if (!uuid[i]) { r = 0 | Math.random()*16; uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r]; } } } return uuid.join(''); }; // A more performant, but slightly bulkier, RFC4122v4 solution. We boost performance // by minimizing calls to random() Math.uuidFast = function() { var chars = CHARS, uuid = new Array(36), rnd=0, r; for (var i = 0; i < 36; i++) { if (i==8 || i==13 || i==18 || i==23) { uuid[i] = '-'; } else if (i==14) { uuid[i] = '4'; } else { if (rnd <= 0x02) rnd = 0x2000000 + (Math.random()*0x1000000)|0; r = rnd & 0xf; rnd = rnd >> 4; uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r]; } } return uuid.join(''); }; // A more compact, but less performant, RFC4122v4 solution: Math.uuidCompact = function() { return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) { var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8); return v.toString(16); }); }; })();
uuid.js - Version 0.2
/*
uuid.js - Version 0.2
JavaScript Class to create a UUID like identifier
Copyright (C) 2006-2008, Erik Giberti (AF-Design), All rights reserved.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
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
The latest version of this file can be downloaded from
http://www.af-design.com/resources/javascript_uuid.php
HISTORY:
6/5/06 - Initial Release
5/22/08 - Updated code to run faster, removed randrange(min,max) in favor of
a simpler rand(max) function. Reduced overhead by using getTime()
method of date class (suggestion by James Hall).
KNOWN ISSUES:
- Still no way to get MAC address in JavaScript
- Research into other versions of UUID show promising possibilities
(more research needed)
- Documentation needs improvement
*/
// On creation of a UUID object, set it's initial value
function UUID(){
this.id = this.createUUID();
}
// When asked what this Object is, lie and return it's value
UUID.prototype.valueOf = function(){ return this.id; }
UUID.prototype.toString = function(){ return this.id; }
//
// INSTANCE SPECIFIC METHODS
//
UUID.prototype.createUUID = function(){
//
// Loose interpretation of the specification DCE 1.1: Remote Procedure Call
// described at http://www.opengroup.org/onlinepubs/009629399/apdxa.htm#tagtcjh_37
// since JavaScript doesn't allow access to internal systems, the last 48 bits
// of the node section is made up using a series of random numbers (6 octets long).
//
var dg = new Date(1582, 10, 15, 0, 0, 0, 0);
var dc = new Date();
var t = dc.getTime() - dg.getTime();
var h = '-';
var tl = UUID.getIntegerBits(t,0,31);
var tm = UUID.getIntegerBits(t,32,47);
var thv = UUID.getIntegerBits(t,48,59) + '1'; // version 1, security version is 2
var csar = UUID.getIntegerBits(UUID.rand(4095),0,7);
var csl = UUID.getIntegerBits(UUID.rand(4095),0,7);
// since detection of anything about the machine/browser is far to buggy,
// include some more random numbers here
// if NIC or an IP can be obtained reliably, that should be put in
// here instead.
var n = UUID.getIntegerBits(UUID.rand(8191),0,7) +
UUID.getIntegerBits(UUID.rand(8191),8,15) +
UUID.getIntegerBits(UUID.rand(8191),0,7) +
UUID.getIntegerBits(UUID.rand(8191),8,15) +
UUID.getIntegerBits(UUID.rand(8191),0,15); // this last number is two octets long
return tl + h + tm + h + thv + h + csar + csl + h + n;
}
//
// GENERAL METHODS (Not instance specific)
//
// Pull out only certain bits from a very large integer, used to get the time
// code information for the first part of a UUID. Will return zero's if there
// aren't enough bits to shift where it needs to.
UUID.getIntegerBits = function(val,start,end){
var base16 = UUID.returnBase(val,16);
var quadArray = new Array();
var quadString = '';
var i = 0;
for(i=0;i<base16.length;i++){
quadArray.push(base16.substring(i,i+1));
}
for(i=Math.floor(start/4);i<=Math.floor(end/4);i++){
if(!quadArray[i] || quadArray[i] == '') quadString += '0';
else quadString += quadArray[i];
}
return quadString;
}
// Numeric Base Conversion algorithm from irt.org
// In base 16: 0=0, 5=5, 10=A, 15=F
UUID.returnBase = function(number, base){
//
// Copyright 1996-2006 irt.org, All Rights Reserved.
//
// Downloaded from: http://www.irt.org/script/146.htm
// modified to work in this class by Erik Giberti
var convert = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];
if (number < base) var output = convert[number];
else {
var MSD = '' + Math.floor(number / base);
var LSD = number - MSD*base;
if (MSD >= base) var output = this.returnBase(MSD,base) + convert[LSD];
else var output = convert[MSD] + convert[LSD];
}
return output;
}
// pick a random number within a range of numbers
// int b rand(int a); where 0 <= b <= a
UUID.rand = function(max){
return Math.floor(Math.random() * max);
}
// end of UUID class file