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@taichunmin/crc

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

github.com/taichunmin/js-crc

taichunmin/js-crc

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import { setObject, u16 } from './common2' const POLY_TABLE = new Uint16Array([ 0x0000, 0x755B, 0xEAB6, 0x9FED, 0xA037, 0xD56C, 0x4A81, 0x3FDA, 0x3535, 0x406E, 0xDF83, 0xAAD8, 0x9502, 0xE059, 0x7FB4, 0x0AEF, 0x6A6A, 0x1F31, 0x80DC, 0xF587, 0xCA5D, 0xBF06, 0x20EB, 0x55B0, 0x5F5F, 0x2A04, 0xB5E9, 0xC0B2, 0xFF68, 0x8A33, 0x15DE, 0x6085, 0xD4D4, 0xA18F, 0x3E62, 0x4B39, 0x74E3, 0x01B8, 0x9E55, 0xEB0E, 0xE1E1, 0x94BA, 0x0B57, 0x7E0C, 0x41D6, 0x348D, 0xAB60, 0xDE3B, 0xBEBE, 0xCBE5, 0x5408, 0x2153, 0x1E89, 0x6BD2, 0xF43F, 0x8164, 0x8B8B, 0xFED0, 0x613D, 0x1466, 0x2BBC, 0x5EE7, 0xC10A, 0xB451, 0xDCF3, 0xA9A8, 0x3645, 0x431E, 0x7CC4, 0x099F, 0x9672, 0xE329, 0xE9C6, 0x9C9D, 0x0370, 0x762B, 0x49F1, 0x3CAA, 0xA347, 0xD61C, 0xB699, 0xC3C2, 0x5C2F, 0x2974, 0x16AE, 0x63F5, 0xFC18, 0x8943, 0x83AC, 0xF6F7, 0x691A, 0x1C41, 0x239B, 0x56C0, 0xC92D, 0xBC76, 0x0827, 0x7D7C, 0xE291, 0x97CA, 0xA810, 0xDD4B, 0x42A6, 0x37FD, 0x3D12, 0x4849, 0xD7A4, 0xA2FF, 0x9D25, 0xE87E, 0x7793, 0x02C8, 0x624D, 0x1716, 0x88FB, 0xFDA0, 0xC27A, 0xB721, 0x28CC, 0x5D97, 0x5778, 0x2223, 0xBDCE, 0xC895, 0xF74F, 0x8214, 0x1DF9, 0x68A2, 0xCCBD, 0xB9E6, 0x260B, 0x5350, 0x6C8A, 0x19D1, 0x863C, 0xF367, 0xF988, 0x8CD3, 0x133E, 0x6665, 0x59BF, 0x2CE4, 0xB309, 0xC652, 0xA6D7, 0xD38C, 0x4C61, 0x393A, 0x06E0, 0x73BB, 0xEC56, 0x990D, 0x93E2, 0xE6B9, 0x7954, 0x0C0F, 0x33D5, 0x468E, 0xD963, 0xAC38, 0x1869, 0x6D32, 0xF2DF, 0x8784, 0xB85E, 0xCD05, 0x52E8, 0x27B3, 0x2D5C, 0x5807, 0xC7EA, 0xB2B1, 0x8D6B, 0xF830, 0x67DD, 0x1286, 0x7203, 0x0758, 0x98B5, 0xEDEE, 0xD234, 0xA76F, 0x3882, 0x4DD9, 0x4736, 0x326D, 0xAD80, 0xD8DB, 0xE701, 0x925A, 0x0DB7, 0x78EC, 0x104E, 0x6515, 0xFAF8, 0x8FA3, 0xB079, 0xC522, 0x5ACF, 0x2F94, 0x257B, 0x5020, 0xCFCD, 0xBA96, 0x854C, 0xF017, 0x6FFA, 0x1AA1, 0x7A24, 0x0F7F, 0x9092, 0xE5C9, 0xDA13, 0xAF48, 0x30A5, 0x45FE, 0x4F11, 0x3A4A, 0xA5A7, 0xD0FC, 0xEF26, 0x9A7D, 0x0590, 0x70CB, 0xC49A, 0xB1C1, 0x2E2C, 0x5B77, 0x64AD, 0x11F6, 0x8E1B, 0xFB40, 0xF1AF, 0x84F4, 0x1B19, 0x6E42, 0x5198, 0x24C3, 0xBB2E, 0xCE75, 0xAEF0, 0xDBAB, 0x4446, 0x311D, 0x0EC7, 0x7B9C, 0xE471, 0x912A, 0x9BC5, 0xEE9E, 0x7173, 0x0428, 0x3BF2, 0x4EA9, 0xD144, 0xA41F, ]) /** * - poly: 0x755B * - initial: 0x0000 * - xorout: 0x0000 * - refin: false * - refout: false */ export default function crc16opensafetyb (buf: Uint8Array = new Uint8Array(), prev: number = 0x0000): number { u16[0] = prev // revert of refout and xorout for (const b of buf) u16[0] = POLY_TABLE[(u16[0] >>> 8) ^ b] ^ (u16[0] << 8) return u16[0] } setObject(globalThis, ['taichunmin', 'crc', 'crc16opensafetyb'], crc16opensafetyb)