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+%% Copyright (C) 2012 by Martin Scharrer <martin@scharrer-online.de>
+%% --------------------------------------------------------------------
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%% The latest version of this license is in
+%%   http://www.latex-project.org/lppl.txt
+%% and version 1.3 or later is part of all distributions of LaTeX
+%% version 2005/12/01 or later.
+%%
+%% This work has the LPPL maintenance status `maintained'.
+%%
+%% The Current Maintainer of this work is Martin Scharrer.
+%%
+%% This work consists of the files multienv.dtx and multienv.ins
+%% and the derived filebase multienv.sty.
+%%
+\NeedsTeXFormat{LaTeX2e}[1999/12/01]
+\ProvidesPackage{multienv}[%
+    2012/05/20
+    v1.0
+    Add multiple environments using a Key=value syntax]
+\newcommand{\multienv}{%
+    \begingroup
+    \@ifstar{%
+        \let\multienv@addcode\multienv@addcode@out
+        \multienv@readkeys
+    }{%
+        \let\multienv@addcode\multienv@addcode@in
+        \multienv@readkeys
+    }%
+}
+\def\endmultienv{\end@multienv\endgroup}
+\newenvironment{multienv*}{%
+    \begingroup
+    \let\multienv@addcode\multienv@addcode@out
+    \multienv@readkeys
+}{%
+    \end@multienv\endgroup
+}
+\newcommand\newmultienvironment{%
+    \let\@multi@environment\newenvironment
+    \@multienvironment
+}
+\newcommand\renewmultienvironment{%
+    \let\@multi@environment\renewenvironment
+    \@multienvironment
+}
+\newcommand\providemultienvironment{%
+    \@ifstar
+        {\@providemultienvironment*}%
+        {\@providemultienvironment{}}%
+}
+\def\@providemultienvironment#1#2{%
+    \@ifundefined{#2}%
+        {\newmultienvironment#1{#2}}%
+        {\begingroup\tracingall\renewcommand\@tempa[1][]{\renewcommand\@tempa[1][]{\expandafter\endgroup\@gobble}\@tempa}\@tempa}%
+}
+\def\@multienvironment{%
+    \@ifstar{%
+        \let\multienv@addcode\multienv@addcode@out
+        \newmultienvironment@marg
+    }{%
+        \let\multienv@addcode\multienv@addcode@in
+        \newmultienvironment@marg
+    }%
+}
+\long\def\newmultienvironment@marg#1{%
+    \@testopt{\newmultienvironment@oarg{#1}}{[0]}%
+}
+\long\def\newmultienvironment@oarg#1[#2]{%
+    \@ifnextchar[{%
+        \newmultienvironment@oargb{#1}{#2}%
+    }{%
+        \newmultienvironment@def{#1}{[#2]}%
+    }%
+}
+\long\def\newmultienvironment@oargb#1#2[#3]{%
+    \newmultienvironment@def{#1}{[#2][#3]}%
+}
+\long\def\newmultienvironment@def#1#2#3{%
+    \begingroup
+    \multienv@readkeys@{#3}%
+    \def\@tempa{\@multi@environment*{#1}#2}%
+    \@temptokena\expandafter\expandafter\expandafter{\expandafter\expandafter\expandafter{\expandafter\begin@multienv\expandafter}\expandafter{\end@multienv}}%
+    \expandafter\expandafter\expandafter
+    \endgroup
+    \expandafter\@tempa\the\@temptokena
+}
+\long\def\multienv@readkeys#1{%
+    \multienv@readkeys@{#1}%
+    \begin@multienv
+}
+\long\def\multienv@readkeys@#1{%
+    \let\begin@multienv\@empty
+    \let\end@multienv\@empty
+    \multienv@readkeyval#1,\@nnil,\@nnil
+}
+\let\begin@multienv\@empty
+\let\end@multienv\@empty
+\long\def\multienv@readkeyval#1,{%
+    \ifx\@nnil#1\relax
+        \expandafter\@gobble
+    \else
+        \multienv@sepkeyval#1=\@nnil=\@nnil\relax
+        \expandafter\multienv@readkeyval
+    \fi
+}
+\long\def\multienv@sepkeyval#1=#2={%
+    \ifx\@nnil#2\relax
+        \multienv@handlekeyval{#1}{}%
+        \expandafter\@gobble
+    \else
+        \multienv@handlekeyval{#1}{#2}%
+        \expandafter
+        \@gobblefour
+    \fi
+}
+\long\def\multienv@handlekeyval#1#2{%
+    \@ifundefined{multienv@key@#1}{%
+        \multienv@addenv{#1}{#2}%
+    }{%
+        \@nameuse{multienv@key@#1}#2\@nnil
+    }%
+}
+\long\def\multienv@addenv#1#2{%
+    \@ifnextchar\bgroup{%
+        \multienv@@addenv
+    }{%
+        \ifcase0%
+            \expandafter\ifx\csname @let@token\endcsname\@nnil1\else
+            \expandafter\ifx\csname @let@token\endcsname[1\else
+            \expandafter\ifx\csname @let@token\endcsname<1\fi\fi\fi
+        \relax
+            \expandafter\multienv@@addenv@
+        \else
+            \expandafter\multienv@@addenv
+        \fi
+    }#2\@nnil{#1}%
+}
+\long\def\multienv@@addenv@#1\@nnil{%
+    \multienv@@addenv{{#1}}\@nnil
+}
+\long\def\multienv@@addenv#1\@nnil#2{%
+     \multienv@addcode{\multi@env{#2}#1}{\endmulti@env{#2}}%
+}
+\long\def\multi@env#1{%
+  \begingroup
+  \@ifundefined{#1}%
+    {\@latex@error{Environment #1 undefined}\@eha}%
+    {\csname #1\endcsname}%
+}
+\def\endmulti@env#1{\csname end#1\endcsname\endgroup}
+\long\def\multienv@addcode@out#1#2{%
+    \@temptokena{#1}%
+    \@temptokena\expandafter\expandafter\expandafter{\expandafter\the\expandafter\@temptokena\begin@multienv}%
+    \edef\begin@multienv{\the\@temptokena}%
+    \@temptokena\expandafter{\end@multienv#2}%
+    \edef\end@multienv{\the\@temptokena}%
+}
+\long\def\multienv@addcode@in#1#2{%
+    \@temptokena\expandafter{\begin@multienv#1}%
+    \edef\begin@multienv{\the\@temptokena}%
+    \@temptokena{#2}%
+    \@temptokena\expandafter\expandafter\expandafter{\expandafter\the\expandafter\@temptokena\end@multienv}%
+    \edef\end@multienv{\the\@temptokena}%
+}
+\long\@namedef{multienv@key@add code}#1\@nnil{%
+    \multienv@addcode#1{}{}%
+}
+\long\@namedef{multienv@key@adjustbox}#1\@nnil{%
+    \multienv@addcode{\csname adjustbox@noindent\endcsname\adjustbox{#1}\bgroup\ignorespaces}{\ifhmode\unskip\fi\egroup}%
+}
+\endinput
+%%
+%% End of file `multienv.sty'.