/* crc32.js (C) 2014-present SheetJS -- http://sheetjs.com */ /* vim: set ts=2: */ /*exported CRC32 */ var CRC32; (function (factory) { /*jshint ignore:start */ if(typeof DO_NOT_EXPORT_CRC === 'undefined') { if('object' === typeof exports) { factory(exports); } else if ('function' === typeof define && define.amd) { define(function () { var module = {}; factory(module); return module; }); } else { factory(CRC32 = {}); } } else { factory(CRC32 = {}); } /*jshint ignore:end */ }(function(CRC32) { CRC32.version = '0.4.1'; /* see perf/crc32table.js */ /*global Int32Array */ function signed_crc_table() { var c = 0, table = new Array(256); for(var n =0; n != 256; ++n){ c = n; c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); table[n] = c; } return typeof Int32Array !== 'undefined' ? new Int32Array(table) : table; } var T = signed_crc_table(); /*global Buffer */ var use_buffer = typeof Buffer !== 'undefined'; function crc32_bstr(bstr) { if(bstr.length > 32768) if(use_buffer) return crc32_buf_8(new Buffer(bstr)); var C = -1, L = bstr.length - 1; for(var i = 0; i < L;) { C = (C>>>8) ^ T[(C^bstr.charCodeAt(i++))&0xFF]; C = (C>>>8) ^ T[(C^bstr.charCodeAt(i++))&0xFF]; } if(i === L) C = (C>>>8) ^ T[(C ^ bstr.charCodeAt(i))&0xFF]; return C ^ -1; } function crc32_buf(buf) { if(buf.length > 10000) return crc32_buf_8(buf); var C = -1, L = buf.length - 3; for(var i = 0; i < L;) { C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; } while(i < L+3) C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; return C ^ -1; } function crc32_buf_8(buf) { var C = -1, L = buf.length - 7; for(var i = 0; i < L;) { C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; } while(i < L+7) C = (C>>>8) ^ T[(C^buf[i++])&0xFF]; return C ^ -1; } function crc32_str(str) { var C = -1; for(var i = 0, L=str.length, c, d; i < L;) { c = str.charCodeAt(i++); if(c < 0x80) { C = (C>>>8) ^ T[(C ^ c)&0xFF]; } else if(c < 0x800) { C = (C>>>8) ^ T[(C ^ (192|((c>>6)&31)))&0xFF]; C = (C>>>8) ^ T[(C ^ (128|(c&63)))&0xFF]; } else if(c >= 0xD800 && c < 0xE000) { c = (c&1023)+64; d = str.charCodeAt(i++)&1023; C = (C>>>8) ^ T[(C ^ (240|((c>>8)&7)))&0xFF]; C = (C>>>8) ^ T[(C ^ (128|((c>>2)&63)))&0xFF]; C = (C>>>8) ^ T[(C ^ (128|((d>>6)&15)|((c&3)<<4)))&0xFF]; C = (C>>>8) ^ T[(C ^ (128|(d&63)))&0xFF]; } else { C = (C>>>8) ^ T[(C ^ (224|((c>>12)&15)))&0xFF]; C = (C>>>8) ^ T[(C ^ (128|((c>>6)&63)))&0xFF]; C = (C>>>8) ^ T[(C ^ (128|(c&63)))&0xFF]; } } return C ^ -1; } CRC32.table = T; CRC32.bstr = crc32_bstr; CRC32.buf = crc32_buf; CRC32.str = crc32_str; }));