Method getBlock

lib/tokenizer.js:249–258

* * @param {Array } key * @param {Number} offset * @param {Number} index * @return {MutableLong}

(key, offset, index)

   * @return {MutableLong}
   */
  getBlock(key, offset, index) {
    const i8 = index << 3;
    const blockOffset = offset + i8;
    return new MutableLong(
      (key[blockOffset]) | (key[blockOffset + 1] << 8),
      (key[blockOffset + 2]) | (key[blockOffset + 3] << 8),
      (key[blockOffset + 4]) | (key[blockOffset + 5] << 8),
      (key[blockOffset + 6]) | (key[blockOffset + 7] << 8)
    );
  }

  /**
   * @param {MutableLong} v