ad Error Notifier</h4>
    <pre>        typedef void (*data_callback)(void *callback_data,const char *file, const int offset);<br>        void LibRaw::set_dataerror_handler(data_callback func, void *callback_data); <br>    </pre>
    <p>The user can define his or her own function to be called in the case of
      error in the input data. It is a void function receiving two parameters:</p>
    <ul>
      <li><strong>void *callback_data</strong> - void*-pointer, passed as 2nd
        argument to set_progress_