code: protected void writeDirectBytes(byte[] b, int off, int len)
  			throws IOException {
  		ostream.write(b, off, len);
  		len += len;
  	}
docs: Ignore current buffer, and write a sequence of bytes directly to the
  underlying stream.
  
  @param b
  byte array
  @param off
  byte array offset
  @param len
  byte array length
  @throws IOException
  IO exception