%% Jérôme Lelong (September 2007)
%% 
%% this stuff fixes the frame numbering in beamer when using an appendix such
%% that the slides of the appendix are not counted in the total framenumber


\makeatletter


\let\appendixtotalframenumber\empty
\def\mainend{-1}
\let\appendixorig\appendix

\def\appendix{
  \edef\mainend{\theframenumber}
  \immediate\write\@auxout{\string\global\string\@namedef{mainendframenumber}{\mainend}}
  \appendixorig
  \def\inserttotalframenumber{\appendixtotalframenumber}%
  \setcounter{framenumber}{0}
}

\def\pageatend{
  \edef\appendixend{\theframenumber}
  \ifnum\mainend>0%
  \immediate\write\@auxout{\string\global\string\@namedef{appendixtotalframenumber}{\appendixend}}%
  \immediate\write\@auxout{\string\global\string\@namedef{inserttotalframenumber}{\mainend}}%
  \immediate\write\@auxout{\string\@writefile{nav}{\noexpand \headcommand {%
        \noexpand \def\noexpand \inserttotalframenumber{\mainend}}}}%
  \immediate\write\@auxout{\string\@writefile{nav}{\noexpand \headcommand {%
        \noexpand \def\noexpand \appendixtotalframenumber{\appendixend}}}}%
  \else
  \fi
}


\AtEndDocument{\pageatend}
\makeatother