math_UUID.js.html 4.2 KB

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  16. <h1 class="page-title">Source: math/UUID.js</h1>
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  19. <pre class="prettyprint source linenums"><code>/**
  20. * Class to implement UUID generation methods.
  21. *
  22. * @class
  23. */
  24. function UUID(){}
  25. /**
  26. * Generates a new random UUID v4 as string.
  27. *
  28. * @static
  29. * @return {string} UUID generated as string.
  30. */
  31. UUID.generate = (function ()
  32. {
  33. var lut = [];
  34. for(var i = 0; i &lt; 256; i++)
  35. {
  36. lut[i] = (i &lt; 16 ? "0" : "") + (i).toString(16);
  37. }
  38. return function generateUUID()
  39. {
  40. var d0 = Math.random() * 0XFFFFFFFF | 0;
  41. var d1 = Math.random() * 0XFFFFFFFF | 0;
  42. var d2 = Math.random() * 0XFFFFFFFF | 0;
  43. var d3 = Math.random() * 0XFFFFFFFF | 0;
  44. var uuid = lut[d0 &amp; 0xff] + lut[d0 >> 8 &amp; 0xff] + lut[d0 >> 16 &amp; 0xff] + lut[d0 >> 24 &amp; 0xff] + "-" +
  45. lut[d1 &amp; 0xff] + lut[d1 >> 8 &amp; 0xff] + "-" + lut[d1 >> 16 &amp; 0x0f | 0x40] + lut[d1 >> 24 &amp; 0xff] + "-" +
  46. lut[d2 &amp; 0x3f | 0x80] + lut[d2 >> 8 &amp; 0xff] + "-" + lut[d2 >> 16 &amp; 0xff] + lut[d2 >> 24 &amp; 0xff] +
  47. lut[d3 &amp; 0xff] + lut[d3 >> 8 &amp; 0xff] + lut[d3 >> 16 &amp; 0xff] + lut[d3 >> 24 &amp; 0xff];
  48. return uuid.toUpperCase();
  49. };
  50. })();
  51. export {UUID};
  52. </code></pre>
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