@taichunmin/crc/lib/crc32autosar.ts

A cross platform alternative for calculating Cyclic Redundancy Checks (CRC) values.

import { setObject, u32 } from './common2'

const POLY_TABLE = new Uint32Array([
  0x00000000, 0x30850FF5, 0x610A1FEA, 0x518F101F, 0xC2143FD4, 0xF2913021, 0xA31E203E, 0x939B2FCB,
  0x159615F7, 0x25131A02, 0x749C0A1D, 0x441905E8, 0xD7822A23, 0xE70725D6, 0xB68835C9, 0x860D3A3C,
  0x2B2C2BEE, 0x1BA9241B, 0x4A263404, 0x7AA33BF1, 0xE938143A, 0xD9BD1BCF, 0x88320BD0, 0xB8B70425,
  0x3EBA3E19, 0x0E3F31EC, 0x5FB021F3, 0x6F352E06, 0xFCAE01CD, 0xCC2B0E38, 0x9DA41E27, 0xAD2111D2,
  0x565857DC, 0x66DD5829, 0x37524836, 0x07D747C3, 0x944C6808, 0xA4C967FD, 0xF54677E2, 0xC5C37817,
  0x43CE422B, 0x734B4DDE, 0x22C45DC1, 0x12415234, 0x81DA7DFF, 0xB15F720A, 0xE0D06215, 0xD0556DE0,
  0x7D747C32, 0x4DF173C7, 0x1C7E63D8, 0x2CFB6C2D, 0xBF6043E6, 0x8FE54C13, 0xDE6A5C0C, 0xEEEF53F9,
  0x68E269C5, 0x58676630, 0x09E8762F, 0x396D79DA, 0xAAF65611, 0x9A7359E4, 0xCBFC49FB, 0xFB79460E,
  0xACB0AFB8, 0x9C35A04D, 0xCDBAB052, 0xFD3FBFA7, 0x6EA4906C, 0x5E219F99, 0x0FAE8F86, 0x3F2B8073,
  0xB926BA4F, 0x89A3B5BA, 0xD82CA5A5, 0xE8A9AA50, 0x7B32859B, 0x4BB78A6E, 0x1A389A71, 0x2ABD9584,
  0x879C8456, 0xB7198BA3, 0xE6969BBC, 0xD6139449, 0x4588BB82, 0x750DB477, 0x2482A468, 0x1407AB9D,
  0x920A91A1, 0xA28F9E54, 0xF3008E4B, 0xC38581BE, 0x501EAE75, 0x609BA180, 0x3114B19F, 0x0191BE6A,
  0xFAE8F864, 0xCA6DF791, 0x9BE2E78E, 0xAB67E87B, 0x38FCC7B0, 0x0879C845, 0x59F6D85A, 0x6973D7AF,
  0xEF7EED93, 0xDFFBE266, 0x8E74F279, 0xBEF1FD8C, 0x2D6AD247, 0x1DEFDDB2, 0x4C60CDAD, 0x7CE5C258,
  0xD1C4D38A, 0xE141DC7F, 0xB0CECC60, 0x804BC395, 0x13D0EC5E, 0x2355E3AB, 0x72DAF3B4, 0x425FFC41,
  0xC452C67D, 0xF4D7C988, 0xA558D997, 0x95DDD662, 0x0646F9A9, 0x36C3F65C, 0x674CE643, 0x57C9E9B6,
  0xC8DF352F, 0xF85A3ADA, 0xA9D52AC5, 0x99502530, 0x0ACB0AFB, 0x3A4E050E, 0x6BC11511, 0x5B441AE4,
  0xDD4920D8, 0xEDCC2F2D, 0xBC433F32, 0x8CC630C7, 0x1F5D1F0C, 0x2FD810F9, 0x7E5700E6, 0x4ED20F13,
  0xE3F31EC1, 0xD3761134, 0x82F9012B, 0xB27C0EDE, 0x21E72115, 0x11622EE0, 0x40ED3EFF, 0x7068310A,
  0xF6650B36, 0xC6E004C3, 0x976F14DC, 0xA7EA1B29, 0x347134E2, 0x04F43B17, 0x557B2B08, 0x65FE24FD,
  0x9E8762F3, 0xAE026D06, 0xFF8D7D19, 0xCF0872EC, 0x5C935D27, 0x6C1652D2, 0x3D9942CD, 0x0D1C4D38,
  0x8B117704, 0xBB9478F1, 0xEA1B68EE, 0xDA9E671B, 0x490548D0, 0x79804725, 0x280F573A, 0x188A58CF,
  0xB5AB491D, 0x852E46E8, 0xD4A156F7, 0xE4245902, 0x77BF76C9, 0x473A793C, 0x16B56923, 0x263066D6,
  0xA03D5CEA, 0x90B8531F, 0xC1374300, 0xF1B24CF5, 0x6229633E, 0x52AC6CCB, 0x03237CD4, 0x33A67321,
  0x646F9A97, 0x54EA9562, 0x0565857D, 0x35E08A88, 0xA67BA543, 0x96FEAAB6, 0xC771BAA9, 0xF7F4B55C,
  0x71F98F60, 0x417C8095, 0x10F3908A, 0x20769F7F, 0xB3EDB0B4, 0x8368BF41, 0xD2E7AF5E, 0xE262A0AB,
  0x4F43B179, 0x7FC6BE8C, 0x2E49AE93, 0x1ECCA166, 0x8D578EAD, 0xBDD28158, 0xEC5D9147, 0xDCD89EB2,
  0x5AD5A48E, 0x6A50AB7B, 0x3BDFBB64, 0x0B5AB491, 0x98C19B5A, 0xA84494AF, 0xF9CB84B0, 0xC94E8B45,
  0x3237CD4B, 0x02B2C2BE, 0x533DD2A1, 0x63B8DD54, 0xF023F29F, 0xC0A6FD6A, 0x9129ED75, 0xA1ACE280,
  0x27A1D8BC, 0x1724D749, 0x46ABC756, 0x762EC8A3, 0xE5B5E768, 0xD530E89D, 0x84BFF882, 0xB43AF777,
  0x191BE6A5, 0x299EE950, 0x7811F94F, 0x4894F6BA, 0xDB0FD971, 0xEB8AD684, 0xBA05C69B, 0x8A80C96E,
  0x0C8DF352, 0x3C08FCA7, 0x6D87ECB8, 0x5D02E34D, 0xCE99CC86, 0xFE1CC373, 0xAF93D36C, 0x9F16DC99,
])

/**
 * - poly: 0xF4ACFB13
 * - initial: 0xFFFFFFFF
 * - xorout: 0xFFFFFFFF
 * - refin: true
 * - refout: true
 */
const xorout = 0xFFFFFFFF
export default function crc32autosar (buf: Uint8Array = new Uint8Array(), prev: number = 0x00000000): number {
  u32[0] = prev ^ xorout // revert xorout
  for (const b of buf) u32[0] = POLY_TABLE[(u32[0] ^ b) & 0xFF] ^ (u32[0] >>> 8)
  return (u32[0] ^ xorout) >>> 0
}

setObject(globalThis, ['taichunmin', 'crc', 'crc32autosar'], crc32autosar)