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- 'use strict';
- 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;
- }
- var crcTable = makeTable();
- function crc32(crc, buf, len, pos) {
- var t = crcTable,
- end = pos + len;
- crc ^= -1;
- for (var i = pos; i < end; i++) {
- crc = (crc >>> 8) ^ t[(crc ^ buf[i]) & 0xFF];
- }
- return (crc ^ (-1));
- }
- module.exports = crc32;
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