--- /dev/null
+// uuid.js
+//
+// Copyright (c) 2010-2012 Robert Kieffer
+// MIT License - http://opensource.org/licenses/mit-license.php
+
+/*global window, require, define */
+(function(_window) {
+ 'use strict';
+
+ // Unique ID creation requires a high quality random # generator. We feature
+ // detect to determine the best RNG source, normalizing to a function that
+ // returns 128-bits of randomness, since that's what's usually required
+ var _rng, _mathRNG, _nodeRNG, _whatwgRNG, _previousRoot;
+
+ function setupBrowser() {
+ // Allow for MSIE11 msCrypto
+ var _crypto = _window.crypto || _window.msCrypto;
+
+ if (!_rng && _crypto && _crypto.getRandomValues) {
+ // WHATWG crypto-based RNG - http://wiki.whatwg.org/wiki/Crypto
+ //
+ // Moderately fast, high quality
+ try {
+ var _rnds8 = new Uint8Array(16);
+ _whatwgRNG = _rng = function whatwgRNG() {
+ _crypto.getRandomValues(_rnds8);
+ return _rnds8;
+ };
+ _rng();
+ } catch(e) {}
+ }
+
+ if (!_rng) {
+ // Math.random()-based (RNG)
+ //
+ // If all else fails, use Math.random(). It's fast, but is of unspecified
+ // quality.
+ var _rnds = new Array(16);
+ _mathRNG = _rng = function() {
+ for (var i = 0, r; i < 16; i++) {
+ if ((i & 0x03) === 0) { r = Math.random() * 0x100000000; }
+ _rnds[i] = r >>> ((i & 0x03) << 3) & 0xff;
+ }
+
+ return _rnds;
+ };
+ if ('undefined' !== typeof console && console.warn) {
+ console.warn("[SECURITY] node-uuid: crypto not usable, falling back to insecure Math.random()");
+ }
+ }
+ }
+
+ function setupNode() {
+ // Node.js crypto-based RNG - http://nodejs.org/docs/v0.6.2/api/crypto.html
+ //
+ // Moderately fast, high quality
+ if ('function' === typeof require) {
+ try {
+ var _rb = require('crypto').randomBytes;
+ _nodeRNG = _rng = _rb && function() {return _rb(16);};
+ _rng();
+ } catch(e) {}
+ }
+ }
+
+ if (_window) {
+ setupBrowser();
+ } else {
+ setupNode();
+ }
+
+ // Buffer class to use
+ var BufferClass = ('function' === typeof Buffer) ? Buffer : Array;
+
+ // Maps for number <-> hex string conversion
+ var _byteToHex = [];
+ var _hexToByte = {};
+ for (var i = 0; i < 256; i++) {
+ _byteToHex[i] = (i + 0x100).toString(16).substr(1);
+ _hexToByte[_byteToHex[i]] = i;
+ }
+
+ // **`parse()` - Parse a UUID into it's component bytes**
+ function parse(s, buf, offset) {
+ var i = (buf && offset) || 0, ii = 0;
+
+ buf = buf || [];
+ s.toLowerCase().replace(/[0-9a-f]{2}/g, function(oct) {
+ if (ii < 16) { // Don't overflow!
+ buf[i + ii++] = _hexToByte[oct];
+ }
+ });
+
+ // Zero out remaining bytes if string was short
+ while (ii < 16) {
+ buf[i + ii++] = 0;
+ }
+
+ return buf;
+ }
+
+ // **`unparse()` - Convert UUID byte array (ala parse()) into a string**
+ function unparse(buf, offset) {
+ var i = offset || 0, bth = _byteToHex;
+ return bth[buf[i++]] + bth[buf[i++]] +
+ bth[buf[i++]] + bth[buf[i++]] + '-' +
+ bth[buf[i++]] + bth[buf[i++]] + '-' +
+ bth[buf[i++]] + bth[buf[i++]] + '-' +
+ bth[buf[i++]] + bth[buf[i++]] + '-' +
+ bth[buf[i++]] + bth[buf[i++]] +
+ bth[buf[i++]] + bth[buf[i++]] +
+ bth[buf[i++]] + bth[buf[i++]];
+ }
+
+ // **`v1()` - Generate time-based UUID**
+ //
+ // Inspired by https://github.com/LiosK/UUID.js
+ // and http://docs.python.org/library/uuid.html
+
+ // random #'s we need to init node and clockseq
+ var _seedBytes = _rng();
+
+ // Per 4.5, create and 48-bit node id, (47 random bits + multicast bit = 1)
+ var _nodeId = [
+ _seedBytes[0] | 0x01,
+ _seedBytes[1], _seedBytes[2], _seedBytes[3], _seedBytes[4], _seedBytes[5]
+ ];
+
+ // Per 4.2.2, randomize (14 bit) clockseq
+ var _clockseq = (_seedBytes[6] << 8 | _seedBytes[7]) & 0x3fff;
+
+ // Previous uuid creation time
+ var _lastMSecs = 0, _lastNSecs = 0;
+
+ // See https://github.com/broofa/node-uuid for API details
+ function v1(options, buf, offset) {
+ var i = buf && offset || 0;
+ var b = buf || [];
+
+ options = options || {};
+
+ var clockseq = (options.clockseq != null) ? options.clockseq : _clockseq;
+
+ // UUID timestamps are 100 nano-second units since the Gregorian epoch,
+ // (1582-10-15 00:00). JSNumbers aren't precise enough for this, so
+ // time is handled internally as 'msecs' (integer milliseconds) and 'nsecs'
+ // (100-nanoseconds offset from msecs) since unix epoch, 1970-01-01 00:00.
+ var msecs = (options.msecs != null) ? options.msecs : new Date().getTime();
+
+ // Per 4.2.1.2, use count of uuid's generated during the current clock
+ // cycle to simulate higher resolution clock
+ var nsecs = (options.nsecs != null) ? options.nsecs : _lastNSecs + 1;
+
+ // Time since last uuid creation (in msecs)
+ var dt = (msecs - _lastMSecs) + (nsecs - _lastNSecs)/10000;
+
+ // Per 4.2.1.2, Bump clockseq on clock regression
+ if (dt < 0 && options.clockseq == null) {
+ clockseq = clockseq + 1 & 0x3fff;
+ }
+
+ // Reset nsecs if clock regresses (new clockseq) or we've moved onto a new
+ // time interval
+ if ((dt < 0 || msecs > _lastMSecs) && options.nsecs == null) {
+ nsecs = 0;
+ }
+
+ // Per 4.2.1.2 Throw error if too many uuids are requested
+ if (nsecs >= 10000) {
+ throw new Error('uuid.v1(): Can\'t create more than 10M uuids/sec');
+ }
+
+ _lastMSecs = msecs;
+ _lastNSecs = nsecs;
+ _clockseq = clockseq;
+
+ // Per 4.1.4 - Convert from unix epoch to Gregorian epoch
+ msecs += 12219292800000;
+
+ // `time_low`
+ var tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
+ b[i++] = tl >>> 24 & 0xff;
+ b[i++] = tl >>> 16 & 0xff;
+ b[i++] = tl >>> 8 & 0xff;
+ b[i++] = tl & 0xff;
+
+ // `time_mid`
+ var tmh = (msecs / 0x100000000 * 10000) & 0xfffffff;
+ b[i++] = tmh >>> 8 & 0xff;
+ b[i++] = tmh & 0xff;
+
+ // `time_high_and_version`
+ b[i++] = tmh >>> 24 & 0xf | 0x10; // include version
+ b[i++] = tmh >>> 16 & 0xff;
+
+ // `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
+ b[i++] = clockseq >>> 8 | 0x80;
+
+ // `clock_seq_low`
+ b[i++] = clockseq & 0xff;
+
+ // `node`
+ var node = options.node || _nodeId;
+ for (var n = 0; n < 6; n++) {
+ b[i + n] = node[n];
+ }
+
+ return buf ? buf : unparse(b);
+ }
+
+ // **`v4()` - Generate random UUID**
+
+ // See https://github.com/broofa/node-uuid for API details
+ function v4(options, buf, offset) {
+ // Deprecated - 'format' argument, as supported in v1.2
+ var i = buf && offset || 0;
+
+ if (typeof(options) === 'string') {
+ buf = (options === 'binary') ? new BufferClass(16) : null;
+ options = null;
+ }
+ options = options || {};
+
+ var rnds = options.random || (options.rng || _rng)();
+
+ // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
+ rnds[6] = (rnds[6] & 0x0f) | 0x40;
+ rnds[8] = (rnds[8] & 0x3f) | 0x80;
+
+ // Copy bytes to buffer, if provided
+ if (buf) {
+ for (var ii = 0; ii < 16; ii++) {
+ buf[i + ii] = rnds[ii];
+ }
+ }
+
+ return buf || unparse(rnds);
+ }
+
+ // Export public API
+ var uuid = v4;
+ uuid.v1 = v1;
+ uuid.v4 = v4;
+ uuid.parse = parse;
+ uuid.unparse = unparse;
+ uuid.BufferClass = BufferClass;
+ uuid._rng = _rng;
+ uuid._mathRNG = _mathRNG;
+ uuid._nodeRNG = _nodeRNG;
+ uuid._whatwgRNG = _whatwgRNG;
+
+ if (('undefined' !== typeof module) && module.exports) {
+ // Publish as node.js module
+ module.exports = uuid;
+ } else if (typeof define === 'function' && define.amd) {
+ // Publish as AMD module
+ define(function() {return uuid;});
+
+
+ } else {
+ // Publish as global (in browsers)
+ _previousRoot = _window.uuid;
+
+ // **`noConflict()` - (browser only) to reset global 'uuid' var**
+ uuid.noConflict = function() {
+ _window.uuid = _previousRoot;
+ return uuid;
+ };
+
+ _window.uuid = uuid;
+ }
+})('undefined' !== typeof window ? window : null);
projects / yaffs-website / blobdiff