code: public char readChar () throws IOException
    {
      if (m_nInBuf > 0)
      {
        --m_nInBuf;
        if (++m_nBufpos == m_nBufsize)
          m_nBufpos = 0;
        return m_aBuffer[m_nBufpos];
      }
  
      if (++m_nBufpos == m_nAvailable)
        _adjustBuffSize ();
  
      final char c = _readByte ();
      m_aBuffer[m_nBufpos] = c;
  
      // This would be the point to handle CSS (un)escaping
      if (m_bTrackLineColumn)
        _updateLineColumn (c);
      return c;
    }
docs: Read a character.
  
  @return The read character
  @throws IOException
  if an I/O error occurs