PHP's crc32 in JavaScript

module.exports = functioncrc32 (str) {
//  discuss at: https://locutus.io/php/crc32/
// original by: Webtoolkit.info (https://www.webtoolkit.info/)
// improved by: T0bsn
//   example 1: crc32('Kevin van Zonneveld')
//   returns 1: 1249991249
const utf8Encode = require('../xml/utf8_encode')
  str = utf8Encode(str)
const table = [
'00000000',
'77073096',
'EE0E612C',
'990951BA',
'076DC419',
'706AF48F',
'E963A535',
'9E6495A3',
'0EDB8832',
'79DCB8A4',
'E0D5E91E',
'97D2D988',
'09B64C2B',
'7EB17CBD',
'E7B82D07',
'90BF1D91',
'1DB71064',
'6AB020F2',
'F3B97148',
'84BE41DE',
'1ADAD47D',
'6DDDE4EB',
'F4D4B551',
'83D385C7',
'136C9856',
'646BA8C0',
'FD62F97A',
'8A65C9EC',
'14015C4F',
'63066CD9',
'FA0F3D63',
'8D080DF5',
'3B6E20C8',
'4C69105E',
'D56041E4',
'A2677172',
'3C03E4D1',
'4B04D447',
'D20D85FD',
'A50AB56B',
'35B5A8FA',
'42B2986C',
'DBBBC9D6',
'ACBCF940',
'32D86CE3',
'45DF5C75',
'DCD60DCF',
'ABD13D59',
'26D930AC',
'51DE003A',
'C8D75180',
'BFD06116',
'21B4F4B5',
'56B3C423',
'CFBA9599',
'B8BDA50F',
'2802B89E',
'5F058808',
'C60CD9B2',
'B10BE924',
'2F6F7C87',
'58684C11',
'C1611DAB',
'B6662D3D',
'76DC4190',
'01DB7106',
'98D220BC',
'EFD5102A',
'71B18589',
'06B6B51F',
'9FBFE4A5',
'E8B8D433',
'7807C9A2',
'0F00F934',
'9609A88E',
'E10E9818',
'7F6A0DBB',
'086D3D2D',
'91646C97',
'E6635C01',
'6B6B51F4',
'1C6C6162',
'856530D8',
'F262004E',
'6C0695ED',
'1B01A57B',
'8208F4C1',
'F50FC457',
'65B0D9C6',
'12B7E950',
'8BBEB8EA',
'FCB9887C',
'62DD1DDF',
'15DA2D49',
'8CD37CF3',
'FBD44C65',
'4DB26158',
'3AB551CE',
'A3BC0074',
'D4BB30E2',
'4ADFA541',
'3DD895D7',
'A4D1C46D',
'D3D6F4FB',
'4369E96A',
'346ED9FC',
'AD678846',
'DA60B8D0',
'44042D73',
'33031DE5',
'AA0A4C5F',
'DD0D7CC9',
'5005713C',
'270241AA',
'BE0B1010',
'C90C2086',
'5768B525',
'206F85B3',
'B966D409',
'CE61E49F',
'5EDEF90E',
'29D9C998',
'B0D09822',
'C7D7A8B4',
'59B33D17',
'2EB40D81',
'B7BD5C3B',
'C0BA6CAD',
'EDB88320',
'9ABFB3B6',
'03B6E20C',
'74B1D29A',
'EAD54739',
'9DD277AF',
'04DB2615',
'73DC1683',
'E3630B12',
'94643B84',
'0D6D6A3E',
'7A6A5AA8',
'E40ECF0B',
'9309FF9D',
'0A00AE27',
'7D079EB1',
'F00F9344',
'8708A3D2',
'1E01F268',
'6906C2FE',
'F762575D',
'806567CB',
'196C3671',
'6E6B06E7',
'FED41B76',
'89D32BE0',
'10DA7A5A',
'67DD4ACC',
'F9B9DF6F',
'8EBEEFF9',
'17B7BE43',
'60B08ED5',
'D6D6A3E8',
'A1D1937E',
'38D8C2C4',
'4FDFF252',
'D1BB67F1',
'A6BC5767',
'3FB506DD',
'48B2364B',
'D80D2BDA',
'AF0A1B4C',
'36034AF6',
'41047A60',
'DF60EFC3',
'A867DF55',
'316E8EEF',
'4669BE79',
'CB61B38C',
'BC66831A',
'256FD2A0',
'5268E236',
'CC0C7795',
'BB0B4703',
'220216B9',
'5505262F',
'C5BA3BBE',
'B2BD0B28',
'2BB45A92',
'5CB36A04',
'C2D7FFA7',
'B5D0CF31',
'2CD99E8B',
'5BDEAE1D',
'9B64C2B0',
'EC63F226',
'756AA39C',
'026D930A',
'9C0906A9',
'EB0E363F',
'72076785',
'05005713',
'95BF4A82',
'E2B87A14',
'7BB12BAE',
'0CB61B38',
'92D28E9B',
'E5D5BE0D',
'7CDCEFB7',
'0BDBDF21',
'86D3D2D4',
'F1D4E242',
'68DDB3F8',
'1FDA836E',
'81BE16CD',
'F6B9265B',
'6FB077E1',
'18B74777',
'88085AE6',
'FF0F6A70',
'66063BCA',
'11010B5C',
'8F659EFF',
'F862AE69',
'616BFFD3',
'166CCF45',
'A00AE278',
'D70DD2EE',
'4E048354',
'3903B3C2',
'A7672661',
'D06016F7',
'4969474D',
'3E6E77DB',
'AED16A4A',
'D9D65ADC',
'40DF0B66',
'37D83BF0',
'A9BCAE53',
'DEBB9EC5',
'47B2CF7F',
'30B5FFE9',
'BDBDF21C',
'CABAC28A',
'53B39330',
'24B4A3A6',
'BAD03605',
'CDD70693',
'54DE5729',
'23D967BF',
'B3667A2E',
'C4614AB8',
'5D681B02',
'2A6F2B94',
'B40BBE37',
'C30C8EA1',
'5A05DF1B',
'2D02EF8D'
  ].join(' ')
// @todo: ^-- Now that `table` is an array, maybe we can use that directly using slices,
// instead of converting it to a string and substringing
let crc = 0
let x = 0
let y = 0
  crc = crc ^ (-1)
for (let i = 0, iTop = str.length; i < iTop; i++) {
    y = (crc ^ str.charCodeAt(i)) & 0xFF
    x = '0x' + table.substr(y * 9, 8)
    crc = (crc >>> 8) ^ x
  }
return crc ^ (-1)
}