g_data_input_stream_read_upto_async

procedure g_data_input_stream_read_upto_async(

  stream: PGDataInputStream;

  stop_chars: Pgchar;

  stop_chars_len: gssize;

  io_priority: gint;

  cancellable: PGCancellable;

  callback: TGAsyncReadyCallback;

  user_data: gpointer

);