>return
        code convention</a>: positive if any system call has returned an error,
      negative (from the <a href="API-datastruct.html#LibRaw_errors">LibRaw
        error list</a>) if there has been an error situation within LibRaw.</p>
    <p><a name="unpack_function_name"></a></p>
    <h3>const char* LibRaw::unpack_function_name()</h3>
    <p>Returns function name of file unpacking function. Intended only for
      LibRaw test suite designers to use in test coverage evaluation.</p>
    <p><a name="