z_stream

type z_stream = record

  next_in: Pbyte;

  avail_in: Cardinal;

  total_in: QWord;

  next_out: Pbyte;

  avail_out: Cardinal;

  total_out: QWord;

  msg: string;

  state: pInternal_state;

  data_type: Integer;

  adler: Cardinal;

  reserved: Cardinal;

end;