Method constructor

lib/zlib.js:887–925

(opts, mode, initParamsArray, maxParam)

};
class Zstd extends ZlibBase {
  constructor(opts, mode, initParamsArray, maxParam) {
    assert(mode === ZSTD_COMPRESS || mode === ZSTD_DECOMPRESS);

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

    const handle = mode === ZSTD_COMPRESS ?
      new binding.ZstdCompress() : new binding.ZstdDecompress();

    const pledgedSrcSize = opts?.pledgedSrcSize ?? undefined;

    const writeState = new Uint32Array(2);

    handle.init(
      initParamsArray,
      pledgedSrcSize,
      writeState,
      processCallback,
      opts?.dictionary && isArrayBufferView(opts.dictionary) ? opts.dictionary : undefined,
    );

    super(opts, mode, handle, zstdDefaultOpts);
    this._writeState = writeState;
  }
}

const kMaxZstdCParam = MathMax(...ObjectKeys(constants).map(