ifluatex.sty

%%
%% This is file `ifluatex.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% ifluatex.dtx  (with options: `package')
%% 
%% This is a generated file.
%% 
%% Project: ifluatex
%% Version: 2010/03/01 v1.3
%% 
%% Copyright (C) 2007, 2009, 2010 by
%%    Heiko Oberdiek <heiko.oberdiek at googlemail.com>
%% 
%% This work may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either
%% version 1.3c of this license or (at your option) any later
%% version. This version of this license is in
%%    http://www.latex-project.org/lppl/lppl-1-3c.txt
%% and 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".
%% 
%% This Current Maintainer of this work is Heiko Oberdiek.
%% 
%% The Base Interpreter refers to any `TeX-Format',
%% because some files are installed in TDS:tex/generic//.
%% 
%% This work consists of the main source file ifluatex.dtx
%% and the derived files
%%    ifluatex.sty, ifluatex.pdf, ifluatex.ins, ifluatex.drv,
%%    ifluatex-test1.tex, ifluatex-test2.tex, ifluatex-test3.tex.
%% 
\begingroup\catcode61\catcode48\catcode32=10\relax%
  \catcode13=5 % ^^M
  \endlinechar=13 %
  \catcode35=6 % #
  \catcode39=12 % '
  \catcode44=12 % ,
  \catcode45=12 % -
  \catcode46=12 % .
  \catcode58=12 % :
  \catcode64=11 % @
  \catcode123=1 % {
  \catcode125=2 % }
  \expandafter\let\expandafter\x\csname ver@ifluatex.sty\endcsname
  \ifx\x\relax % plain-TeX, first loading
  \else
    \def\empty{}%
    \ifx\x\empty % LaTeX, first loading,
      % variable is initialized, but \ProvidesPackage not yet seen
    \else
      \expandafter\ifx\csname PackageInfo\endcsname\relax
        \def\x#1#2{%
          \immediate\write-1{Package #1 Info: #2.}%
        }%
      \else
        \def\x#1#2{\PackageInfo{#1}{#2, stopped}}%
      \fi
      \x{ifluatex}{The package is already loaded}%
      \aftergroup\endinput
    \fi
  \fi
\endgroup%
\begingroup\catcode61\catcode48\catcode32=10\relax%
  \catcode13=5 % ^^M
  \endlinechar=13 %
  \catcode35=6 % #
  \catcode39=12 % '
  \catcode40=12 % (
  \catcode41=12 % )
  \catcode44=12 % ,
  \catcode45=12 % -
  \catcode46=12 % .
  \catcode47=12 % /
  \catcode58=12 % :
  \catcode64=11 % @
  \catcode91=12 % [
  \catcode93=12 % ]
  \catcode123=1 % {
  \catcode125=2 % }
  \expandafter\ifx\csname ProvidesPackage\endcsname\relax
    \def\x#1#2#3[#4]{\endgroup
      \immediate\write-1{Package: #3 #4}%
      \xdef#1{#4}%
    }%
  \else
    \def\x#1#2[#3]{\endgroup
      #2[{#3}]%
      \ifx#1\@undefined
        \xdef#1{#3}%
      \fi
      \ifx#1\relax
        \xdef#1{#3}%
      \fi
    }%
  \fi
\expandafter\x\csname ver@ifluatex.sty\endcsname
\ProvidesPackage{ifluatex}%
  [2010/03/01 v1.3 Provides the ifluatex switch (HO)]%
\begingroup\catcode61\catcode48\catcode32=10\relax%
  \catcode13=5 % ^^M
  \endlinechar=13 %
  \catcode123=1 % {
  \catcode125=2 % }
  \catcode64=11 % @
  \def\x{\endgroup
    \expandafter\edef\csname ifluatex@AtEnd\endcsname{%
      \endlinechar=\the\endlinechar\relax
      \catcode13=\the\catcode13\relax
      \catcode32=\the\catcode32\relax
      \catcode35=\the\catcode35\relax
      \catcode61=\the\catcode61\relax
      \catcode64=\the\catcode64\relax
      \catcode123=\the\catcode123\relax
      \catcode125=\the\catcode125\relax
    }%
  }%
\x\catcode61\catcode48\catcode32=10\relax%
\catcode13=5 % ^^M
\endlinechar=13 %
\catcode35=6 % #
\catcode64=11 % @
\catcode123=1 % {
\catcode125=2 % }
\def\TMP@EnsureCode#1#2{%
  \edef\ifluatex@AtEnd{%
    \ifluatex@AtEnd
    \catcode#1=\the\catcode#1\relax
  }%
  \catcode#1=#2\relax
}
\TMP@EnsureCode{10}{12}% ^^J
\TMP@EnsureCode{39}{12}% '
\TMP@EnsureCode{40}{12}% (
\TMP@EnsureCode{41}{12}% )
\TMP@EnsureCode{44}{12}% ,
\TMP@EnsureCode{45}{12}% -
\TMP@EnsureCode{46}{12}% .
\TMP@EnsureCode{47}{12}% /
\TMP@EnsureCode{58}{12}% :
\TMP@EnsureCode{60}{12}% <
\TMP@EnsureCode{94}{7}% ^
\TMP@EnsureCode{96}{12}% `
\edef\ifluatex@AtEnd{\ifluatex@AtEnd\noexpand\endinput}
\begingroup\expandafter\expandafter\expandafter\endgroup
\expandafter\ifx\csname PackageError\endcsname\relax
  \def\ifluatex@Error#1#2{%
    \begingroup
      \newlinechar=10 %
      \def\MessageBreak{^^J}%
      \edef\x{\errhelp{#2}}%
      \x
      \errmessage{Package ifluatex Error: #1}%
    \endgroup
  }%
\else
  \def\ifluatex@Error{%
    \PackageError{ifluatex}%
  }%
\fi
\begingroup
  \expandafter\ifx\csname ifluatex\endcsname\relax
  \else
    \edef\i/{\expandafter\string\csname ifluatex\endcsname}%
    \ifluatex@Error{Name clash, \i/ is already defined}{%
      Incompatible versions of \i/ can cause problems,\MessageBreak
      therefore package loading is aborted.%
    }%
    \endgroup
    \expandafter\ifluatex@AtEnd
  \fi%
\endgroup
\let\ifluatex\iffalse
\begingroup\expandafter\expandafter\expandafter\endgroup
\expandafter\ifx\csname luatexversion\endcsname\relax
\else
  \expandafter\let\csname ifluatex\expandafter\endcsname
                  \csname iftrue\endcsname
\fi
\ifluatex
\else
  \begingroup\expandafter\expandafter\expandafter\endgroup
  \expandafter\ifx\csname directlua\endcsname\relax
  \else
    \expandafter\let\csname ifluatex\expandafter\endcsname
                    \csname iftrue\endcsname
    \begingroup
      \newlinechar=10 %
      \endlinechar=\newlinechar%
      \ifnum0%
          \directlua{%
            if tex.enableprimitives then
              tex.enableprimitives('ifluatex', {'luatexversion'})
              tex.print('1')
            end
          }%
          \ifx\ifluatexluatexversion\@undefined\else 1\fi %
          =11 %
        \global\let\luatexversion\ifluatexluatexversion%
      \else%
        \ifluatex@Error{%
          Missing \string\luatexversion%
        }{%
          Update LuaTeX.%
        }%
      \fi%
    \endgroup%
  \fi
\fi
\ifluatex
  \begingroup\expandafter\expandafter\expandafter\endgroup
  \expandafter\ifx\csname luatexrevision\endcsname\relax
    \ifnum\luatexversion<36 %
    \else
      \begingroup
        \ifx\luatexrevision\relax
          \let\luatexrevision\@undefined
        \fi
        \newlinechar=10 %
        \endlinechar=\newlinechar%
        \ifcase0%
            \directlua{%
              if tex.enableprimitives then
                tex.enableprimitives('ifluatex', {'luatexrevision'})
              else
                tex.print('1')
              end
            }%
            \ifx\ifluatexluatexrevision\@undefined 1\fi%
            \relax%
          \global\let\luatexrevision\ifluatexluatexrevision%
        \fi%
      \endgroup%
    \fi
    \begingroup\expandafter\expandafter\expandafter\endgroup
    \expandafter\ifx\csname luatexrevision\endcsname\relax
      \ifluatex@Error{%
        Missing \string\luatexrevision%
      }{%
        Update LuaTeX.%
      }%
    \fi
  \fi
\fi
\begingroup
  \expandafter\ifx\csname PackageInfo\endcsname\relax
    \def\x#1#2{%
      \immediate\write-1{Package #1 Info: #2.}%
    }%
  \else
    \let\x\PackageInfo
    \expandafter\let\csname on@line\endcsname\empty
  \fi
  \x{ifluatex}{LuaTeX \ifluatex\else not \fi detected}%
\endgroup
\ifluatex@AtEnd%
\endinput
%%
%% End of file `ifluatex.sty'.