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Commit Description:
prevent multiple place login using uuid cookie
Commit Description:
prevent multiple place login using uuid cookie
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node_modules/jszip/lib/crc32.js
| 77 lines
| 1.9 KiB
| application/javascript
| JavascriptLexer
|
| r789 | 'use strict'; | |||
| var utils = require('./utils'); | ||||
| /** | ||||
| * The following functions come from pako, from pako/lib/zlib/crc32.js | ||||
| * released under the MIT license, see pako https://github.com/nodeca/pako/ | ||||
| */ | ||||
| // Use ordinary array, since untyped makes no boost here | ||||
| function makeTable() { | ||||
| var c, table = []; | ||||
| for(var n =0; n < 256; n++){ | ||||
| c = n; | ||||
| for(var k =0; k < 8; k++){ | ||||
| c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1)); | ||||
| } | ||||
| table[n] = c; | ||||
| } | ||||
| return table; | ||||
| } | ||||
| // Create table on load. Just 255 signed longs. Not a problem. | ||||
| var crcTable = makeTable(); | ||||
| function crc32(crc, buf, len, pos) { | ||||
| var t = crcTable, end = pos + len; | ||||
| crc = crc ^ (-1); | ||||
| for (var i = pos; i < end; i++ ) { | ||||
| crc = (crc >>> 8) ^ t[(crc ^ buf[i]) & 0xFF]; | ||||
| } | ||||
| return (crc ^ (-1)); // >>> 0; | ||||
| } | ||||
| // That's all for the pako functions. | ||||
| /** | ||||
| * Compute the crc32 of a string. | ||||
| * This is almost the same as the function crc32, but for strings. Using the | ||||
| * same function for the two use cases leads to horrible performances. | ||||
| * @param {Number} crc the starting value of the crc. | ||||
| * @param {String} str the string to use. | ||||
| * @param {Number} len the length of the string. | ||||
| * @param {Number} pos the starting position for the crc32 computation. | ||||
| * @return {Number} the computed crc32. | ||||
| */ | ||||
| function crc32str(crc, str, len, pos) { | ||||
| var t = crcTable, end = pos + len; | ||||
| crc = crc ^ (-1); | ||||
| for (var i = pos; i < end; i++ ) { | ||||
| crc = (crc >>> 8) ^ t[(crc ^ str.charCodeAt(i)) & 0xFF]; | ||||
| } | ||||
| return (crc ^ (-1)); // >>> 0; | ||||
| } | ||||
| module.exports = function crc32wrapper(input, crc) { | ||||
| if (typeof input === "undefined" || !input.length) { | ||||
| return 0; | ||||
| } | ||||
| var isArray = utils.getTypeOf(input) !== "string"; | ||||
| if(isArray) { | ||||
| return crc32(crc|0, input, input.length, 0); | ||||
| } else { | ||||
| return crc32str(crc|0, input, input.length, 0); | ||||
| } | ||||
| }; | ||||