// @ts-check

/** * @type {number[]} */
const crcTable = [];
for (let i = 0; i < 256; i++) {
  let b = i;
  for (let j = 0; j < 8; j++) {
    b = b & 1 ? 0xedb88320 ^ (b >>> 1) : b >>> 1;
  }
  crcTable[i] = b >>> 0;
}

/**
 * Compute the CRC32 checksum of some `Uint8Array`s.
 * @param {Uint8Array[]} uint8arrays
 * @returns {number}
 */
export default (...uint8arrays) => {
  let crc = -1;

  for (const bytes of uint8arrays) {
    for (let i = 0; i < bytes.length; i++) {
      crc = crcTable[(crc ^ bytes[i]) & 0xff] ^ (crc >>> 8);
    }
  }

  return (crc ^ -1) >>> 0;
};