\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{Sweave}{}

\RequirePackage{ifthen}
\newboolean{Sweave@gin}
\setboolean{Sweave@gin}{true}
\newboolean{Sweave@ae}
\setboolean{Sweave@ae}{true}

\DeclareOption{nogin}{\setboolean{Sweave@gin}{false}}
\DeclareOption{noae}{\setboolean{Sweave@ae}{false}}
\ProcessOptions

\RequirePackage{graphicx,fancyvrb}
\IfFileExists{upquote.sty}{\RequirePackage{upquote}}{}

\ifthenelse{\boolean{Sweave@gin}}{\setkeys{Gin}{width=0.8\textwidth}}{}%
\ifthenelse{\boolean{Sweave@ae}}{%
  \RequirePackage[T1]{fontenc}  
  \RequirePackage{ae}
}{}%

\DefineVerbatimEnvironment{Sinput}{Verbatim}{fontshape=sl}
\DefineVerbatimEnvironment{Soutput}{Verbatim}{}
\DefineVerbatimEnvironment{Scode}{Verbatim}{fontshape=sl}

\ifdefined\Schunk%
  \message{\string Environment Schunk is already defined, stay with former definition}%
\else
  \newenvironment{Schunk}{}{}%
\fi

\newcommand{\Sconcordance}[1]{%
  \ifx\pdfoutput\undefined%
  \csname newcount\endcsname\pdfoutput\fi%
  \ifcase\pdfoutput\special{#1}%
  \else%
   \begingroup%
     \pdfcompresslevel=0%
     \immediate\pdfobj stream{#1}%
     \pdfcatalog{/SweaveConcordance \the\pdflastobj\space 0 R}%
   \endgroup%
  \fi}
