Function Brotli

lib/zlib.js:812–858

(opts, mode)

  fullFlush: BROTLI_OPERATION_FLUSH,
};
function Brotli(opts, mode) {
  assert(mode === BROTLI_DECODE || mode === BROTLI_ENCODE);

  brotliInitParamsArray.fill(-1);
  if (opts?.params) {
    ObjectKeys(opts.params).forEach((origKey) => {
      const key = +origKey;
      if (NumberIsNaN(key) || key < 0 || key > kMaxBrotliParam ||
          (brotliInitParamsArray[key] | 0) !== -1) {
        throw new ERR_BROTLI_INVALID_PARAM(origKey);
      }

      const value = opts.params[origKey];
      if (typeof value !== 'number' && typeof value !== 'boolean') {
        throw new ERR_INVALID_ARG_TYPE('options.params[key]',
                                       'number', opts.params[origKey]);
      }
      brotliInitParamsArray[key] = value;
    });
  }

  let dictionary = opts?.dictionary;
  if (dictionary !== undefined && !isArrayBufferView(dictionary)) {
    if (isAnyArrayBuffer(dictionary)) {
      dictionary = Buffer.from(dictionary);
    } else {
      throw new ERR_INVALID_ARG_TYPE(
        'options.dictionary',
        ['Buffer', 'TypedArray', 'DataView', 'ArrayBuffer'],
        dictionary,
      );
    }
  }

  const handle = mode === BROTLI_DECODE ?
    new binding.BrotliDecoder(mode) : new binding.BrotliEncoder(mode);

  this._writeState = new Uint32Array(2);
  handle.init(
    brotliInitParamsArray,
    this._writeState,
    processCallback,
    dictionary,
  );

  ZlibBase.call(this, opts, mode, handle, brotliDefaultOpts);
}
ObjectSetPrototypeOf(Brotli.prototype, Zlib.prototype);
ObjectSetPrototypeOf(Brotli, Zlib);