Method seek

source/base/StarPackedAssetSource.cpp:130–137

    }

    void seek(StreamOffset p, IOSeek mode) override {
      if (mode == IOSeek::Absolute)
        assetPos = p;
      else if (mode == IOSeek::Relative)
        assetPos = clamp<StreamOffset>(assetPos + p, 0, assetSize);
      else
        assetPos = clamp<StreamOffset>(assetSize - p, 0, assetSize);
    }

    IODevicePtr clone() override {
      auto cloned = make_shared<AssetReader>(file, path, fileOffset, assetSize);