summaryrefslogtreecommitdiff
path: root/macros/latex/contrib/oberdiek/ifluatex.dtx
diff options
context:
space:
mode:
Diffstat (limited to 'macros/latex/contrib/oberdiek/ifluatex.dtx')
-rw-r--r--macros/latex/contrib/oberdiek/ifluatex.dtx920
1 files changed, 920 insertions, 0 deletions
diff --git a/macros/latex/contrib/oberdiek/ifluatex.dtx b/macros/latex/contrib/oberdiek/ifluatex.dtx
new file mode 100644
index 0000000000..556dbfaef4
--- /dev/null
+++ b/macros/latex/contrib/oberdiek/ifluatex.dtx
@@ -0,0 +1,920 @@
+% \iffalse meta-comment
+%
+% File: ifluatex.dtx
+% Version: 2016/05/16 v1.4
+% Info: Provides the ifluatex switch
+%
+% Copyright (C) 2007, 2009, 2010 by
+% Heiko Oberdiek <heiko.oberdiek at googlemail.com>
+% 2016
+% https://github.com/ho-tex/oberdiek/issues
+%
+% 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.
+%
+% Distribution:
+% CTAN:macros/latex/contrib/oberdiek/ifluatex.dtx
+% CTAN:macros/latex/contrib/oberdiek/ifluatex.pdf
+%
+% Unpacking:
+% (a) If ifluatex.ins is present:
+% tex ifluatex.ins
+% (b) Without ifluatex.ins:
+% tex ifluatex.dtx
+% (c) If you insist on using LaTeX
+% latex \let\install=y\input{ifluatex.dtx}
+% (quote the arguments according to the demands of your shell)
+%
+% Documentation:
+% (a) If ifluatex.drv is present:
+% latex ifluatex.drv
+% (b) Without ifluatex.drv:
+% latex ifluatex.dtx; ...
+% The class ltxdoc loads the configuration file ltxdoc.cfg
+% if available. Here you can specify further options, e.g.
+% use A4 as paper format:
+% \PassOptionsToClass{a4paper}{article}
+%
+% Programm calls to get the documentation (example):
+% pdflatex ifluatex.dtx
+% makeindex -s gind.ist ifluatex.idx
+% pdflatex ifluatex.dtx
+% makeindex -s gind.ist ifluatex.idx
+% pdflatex ifluatex.dtx
+%
+% Installation:
+% TDS:tex/generic/oberdiek/ifluatex.sty
+% TDS:doc/latex/oberdiek/ifluatex.pdf
+% TDS:doc/latex/oberdiek/test/ifluatex-test1.tex
+% TDS:doc/latex/oberdiek/test/ifluatex-test2.tex
+% TDS:doc/latex/oberdiek/test/ifluatex-test3.tex
+% TDS:source/latex/oberdiek/ifluatex.dtx
+%
+%<*ignore>
+\begingroup
+ \catcode123=1 %
+ \catcode125=2 %
+ \def\x{LaTeX2e}%
+\expandafter\endgroup
+\ifcase 0\ifx\install y1\fi\expandafter
+ \ifx\csname processbatchFile\endcsname\relax\else1\fi
+ \ifx\fmtname\x\else 1\fi\relax
+\else\csname fi\endcsname
+%</ignore>
+%<*install>
+\input docstrip.tex
+\Msg{************************************************************************}
+\Msg{* Installation}
+\Msg{* Package: ifluatex 2016/05/16 v1.4 Provides the ifluatex switch (HO)}
+\Msg{************************************************************************}
+
+\keepsilent
+\askforoverwritefalse
+
+\let\MetaPrefix\relax
+\preamble
+
+This is a generated file.
+
+Project: ifluatex
+Version: 2016/05/16 v1.4
+
+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.
+
+\endpreamble
+\let\MetaPrefix\DoubleperCent
+
+\generate{%
+ \file{ifluatex.ins}{\from{ifluatex.dtx}{install}}%
+ \file{ifluatex.drv}{\from{ifluatex.dtx}{driver}}%
+ \usedir{tex/generic/oberdiek}%
+ \file{ifluatex.sty}{\from{ifluatex.dtx}{package}}%
+% \usedir{doc/latex/oberdiek/test}%
+% \file{ifluatex-test1.tex}{\from{ifluatex.dtx}{test1}}%
+% \file{ifluatex-test2.tex}{\from{ifluatex.dtx}{test-reload1}}%
+% \file{ifluatex-test3.tex}{\from{ifluatex.dtx}{test-reload2}}%
+ \nopreamble
+ \nopostamble
+% \usedir{source/latex/oberdiek/catalogue}%
+% \file{ifluatex.xml}{\from{ifluatex.dtx}{catalogue}}%
+}
+
+\catcode32=13\relax% active space
+\let =\space%
+\Msg{************************************************************************}
+\Msg{*}
+\Msg{* To finish the installation you have to move the following}
+\Msg{* file into a directory searched by TeX:}
+\Msg{*}
+\Msg{* ifluatex.sty}
+\Msg{*}
+\Msg{* To produce the documentation run the file `ifluatex.drv'}
+\Msg{* through LaTeX.}
+\Msg{*}
+\Msg{* Happy TeXing!}
+\Msg{*}
+\Msg{************************************************************************}
+
+\endbatchfile
+%</install>
+%<*ignore>
+\fi
+%</ignore>
+%<*driver>
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesFile{ifluatex.drv}%
+ [2016/05/16 v1.4 Provides the ifluatex switch (HO)]%
+\documentclass{ltxdoc}
+\usepackage{holtxdoc}[2011/11/22]
+\begin{document}
+ \DocInput{ifluatex.dtx}%
+\end{document}
+%</driver>
+% \fi
+%
+%
+% \CharacterTable
+% {Upper-case \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+% Lower-case \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+% Digits \0\1\2\3\4\5\6\7\8\9
+% Exclamation \! Double quote \" Hash (number) \#
+% Dollar \$ Percent \% Ampersand \&
+% Acute accent \' Left paren \( Right paren \)
+% Asterisk \* Plus \+ Comma \,
+% Minus \- Point \. Solidus \/
+% Colon \: Semicolon \; Less than \<
+% Equals \= Greater than \> Question mark \?
+% Commercial at \@ Left bracket \[ Backslash \\
+% Right bracket \] Circumflex \^ Underscore \_
+% Grave accent \` Left brace \{ Vertical bar \|
+% Right brace \} Tilde \~}
+%
+% \GetFileInfo{ifluatex.drv}
+%
+% \title{The \xpackage{ifluatex} package}
+% \date{2016/05/16 v1.4}
+% \author{Heiko Oberdiek\thanks
+% {Please report any issues at https://github.com/ho-tex/oberdiek/issues}\\
+% \xemail{heiko.oberdiek at googlemail.com}}
+%
+% \maketitle
+%
+% \begin{abstract}
+% This package looks for \LuaTeX\ regardless of its mode
+% and provides the switch \cs{ifluatex}. Also it makes
+% \cs{luatexversion} available if it is not present.
+% It works with \plainTeX\ or \LaTeX.
+% \end{abstract}
+%
+% \tableofcontents
+%
+% \section{Documentation}
+%
+% The package \xpackage{ifluatex} can be used with both \plainTeX\
+% and \LaTeX:
+% \begin{description}
+% \item[\plainTeX:] |\input ifluatex.sty|
+% \item[\LaTeXe:] |\usepackage{ifluatex}|
+% \end{description}
+%
+% \DescribeMacro{\ifluatex}
+% The package provides the switch \cs{ifluatex}:
+% \begin{quote}
+% |\ifluatex|\\
+% \hspace{1.5em}\LuaTeX\ is running\\
+% |\else|\\
+% \hspace{1.5em}Without \LuaTeX\\
+% |\fi|
+% \end{quote}
+%
+% Since version 0.39 \LuaTeX\ only provides \cs{directlua} at startup
+% time. Also the syntax of \cs{directlua} changed in version 0.36.
+% Thus the user might want to check the LuaTeX version.
+% Therefore this package also makes \cs{luatexversion} and
+% \cs{luatexrevision} available, if it is not yet done.
+%
+% If you want to detect the mode (DVI or PDF), then use package
+% \xpackage{ifpdf}. \LuaTeX\ has inherited \cs{pdfoutput} from \pdfTeX.
+%
+% \StopEventually{
+% }
+%
+% \section{Implementation}
+%
+% \begin{macrocode}
+%<*package>
+% \end{macrocode}
+%
+% \subsection{Reload check and package identification}
+% Reload check, especially if the package is not used with \LaTeX.
+% \begin{macrocode}
+\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%
+% \end{macrocode}
+% Package identification:
+% \begin{macrocode}
+\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}%
+ [2016/05/16 v1.4 Provides the ifluatex switch (HO)]%
+% \end{macrocode}
+%
+% \subsection{Catcodes}
+%
+% \begin{macrocode}
+\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}
+% \end{macrocode}
+%
+% \subsection{Macro for error messages}
+%
+% \begin{macro}{\ifluatex@Error}
+% \begin{macrocode}
+\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
+% \end{macrocode}
+% \end{macro}
+%
+% \subsection{Check for previously defined \cs{ifluatex}}
+%
+% \begin{macrocode}
+\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
+% \end{macrocode}
+%
+% \subsection{\cs{ifluatex}}
+%
+% \begin{macro}{\ifluatex}
+% \begin{macrocode}
+\let\ifluatex\iffalse
+% \end{macrocode}
+% \end{macro}
+%
+% Test \cs{luatexversion}. Is it defined and different from
+% \cs{relax}? Someone could have used \LaTeX\ internal
+% \cs{@ifundefined}, or something else involving.
+% Notice, \cs{csname} is executed inside a group for the test
+% to cancel the side effect of \cs{csname}.
+% \begin{macrocode}
+\begingroup\expandafter\expandafter\expandafter\endgroup
+\expandafter\ifx\csname luatexversion\endcsname\relax
+\else
+ \expandafter\let\csname ifluatex\expandafter\endcsname
+ \csname iftrue\endcsname
+\fi
+% \end{macrocode}
+%
+% \subsection{Lua\TeX\ v0.39}
+%
+% Starting with version 0.39 \LuaTeX\ wants to provide \cs{directlua}
+% as only primitive at startup time beyond vanilla \TeX's primitives.
+% Then \cs{directlua} exists, but \cs{luatexversion} cannot be found.
+% Unhappily also the syntax of \cs{directlua} changed in v0.36,
+% thus the user would want to check \cs{luatexversion}.
+% Therefore we make \cs{luatexversion} available using
+% \LuaTeX's Lua function |tex.enableprimitives|.
+%
+% \begin{macrocode}
+\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
+% \end{macrocode}
+% \begin{macrocode}
+\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
+% \end{macrocode}
+%
+% \subsection{Protocol entry}
+%
+% Log comment:
+% \begin{macrocode}
+\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
+% \end{macrocode}
+% \begin{macrocode}
+\ifluatex@AtEnd%
+% \end{macrocode}
+% \begin{macrocode}
+%</package>
+% \end{macrocode}
+%
+% \section{Test}
+%
+% \subsection{Catcode checks for loading}
+%
+% \begin{macrocode}
+%<*test1>
+% \end{macrocode}
+% \begin{macrocode}
+\catcode`\{=1 %
+\catcode`\}=2 %
+\catcode`\#=6 %
+\catcode`\@=11 %
+\expandafter\ifx\csname count@\endcsname\relax
+ \countdef\count@=255 %
+\fi
+\expandafter\ifx\csname @gobble\endcsname\relax
+ \long\def\@gobble#1{}%
+\fi
+\expandafter\ifx\csname @firstofone\endcsname\relax
+ \long\def\@firstofone#1{#1}%
+\fi
+\expandafter\ifx\csname loop\endcsname\relax
+ \expandafter\@firstofone
+\else
+ \expandafter\@gobble
+\fi
+{%
+ \def\loop#1\repeat{%
+ \def\body{#1}%
+ \iterate
+ }%
+ \def\iterate{%
+ \body
+ \let\next\iterate
+ \else
+ \let\next\relax
+ \fi
+ \next
+ }%
+ \let\repeat=\fi
+}%
+\def\RestoreCatcodes{}
+\count@=0 %
+\loop
+ \edef\RestoreCatcodes{%
+ \RestoreCatcodes
+ \catcode\the\count@=\the\catcode\count@\relax
+ }%
+\ifnum\count@<255 %
+ \advance\count@ 1 %
+\repeat
+
+\def\RangeCatcodeInvalid#1#2{%
+ \count@=#1\relax
+ \loop
+ \catcode\count@=15 %
+ \ifnum\count@<#2\relax
+ \advance\count@ 1 %
+ \repeat
+}
+\def\RangeCatcodeCheck#1#2#3{%
+ \count@=#1\relax
+ \loop
+ \ifnum#3=\catcode\count@
+ \else
+ \errmessage{%
+ Character \the\count@\space
+ with wrong catcode \the\catcode\count@\space
+ instead of \number#3%
+ }%
+ \fi
+ \ifnum\count@<#2\relax
+ \advance\count@ 1 %
+ \repeat
+}
+\def\space{ }
+\expandafter\ifx\csname LoadCommand\endcsname\relax
+ \def\LoadCommand{\input ifluatex.sty\relax}%
+\fi
+\def\Test{%
+ \RangeCatcodeInvalid{0}{47}%
+ \RangeCatcodeInvalid{58}{64}%
+ \RangeCatcodeInvalid{91}{96}%
+ \RangeCatcodeInvalid{123}{255}%
+ \catcode`\@=12 %
+ \catcode`\\=0 %
+ \catcode`\%=14 %
+ \LoadCommand
+ \RangeCatcodeCheck{0}{36}{15}%
+ \RangeCatcodeCheck{37}{37}{14}%
+ \RangeCatcodeCheck{38}{47}{15}%
+ \RangeCatcodeCheck{48}{57}{12}%
+ \RangeCatcodeCheck{58}{63}{15}%
+ \RangeCatcodeCheck{64}{64}{12}%
+ \RangeCatcodeCheck{65}{90}{11}%
+ \RangeCatcodeCheck{91}{91}{15}%
+ \RangeCatcodeCheck{92}{92}{0}%
+ \RangeCatcodeCheck{93}{96}{15}%
+ \RangeCatcodeCheck{97}{122}{11}%
+ \RangeCatcodeCheck{123}{255}{15}%
+ \RestoreCatcodes
+}
+\Test
+\csname @@end\endcsname
+\end
+% \end{macrocode}
+% \begin{macrocode}
+%</test1>
+% \end{macrocode}
+%
+% \section{Reload check for plain}
+%
+% \begin{macrocode}
+%<*test-reload1>
+\input ifluatex.sty\relax
+\input ifluatex.sty\relax
+\csname @@end\endcsname\end
+%</test-reload1>
+% \end{macrocode}
+%
+% \begin{macrocode}
+%<*test-reload2>
+\input miniltx.tex\relax
+\input ifluatex.sty\relax
+\input ifluatex.sty\relax
+\csname @@end\endcsname\end
+%</test-reload2>
+% \end{macrocode}
+%
+% \section{Installation}
+%
+% \subsection{Download}
+%
+% \paragraph{Package.} This package is available on
+% CTAN\footnote{\url{http://ctan.org/pkg/ifluatex}}:
+% \begin{description}
+% \item[\CTAN{macros/latex/contrib/oberdiek/ifluatex.dtx}] The source file.
+% \item[\CTAN{macros/latex/contrib/oberdiek/ifluatex.pdf}] Documentation.
+% \end{description}
+%
+%
+% \paragraph{Bundle.} All the packages of the bundle `oberdiek'
+% are also available in a TDS compliant ZIP archive. There
+% the packages are already unpacked and the documentation files
+% are generated. The files and directories obey the TDS standard.
+% \begin{description}
+% \item[\CTAN{install/macros/latex/contrib/oberdiek.tds.zip}]
+% \end{description}
+% \emph{TDS} refers to the standard ``A Directory Structure
+% for \TeX\ Files'' (\CTAN{tds/tds.pdf}). Directories
+% with \xfile{texmf} in their name are usually organized this way.
+%
+% \subsection{Bundle installation}
+%
+% \paragraph{Unpacking.} Unpack the \xfile{oberdiek.tds.zip} in the
+% TDS tree (also known as \xfile{texmf} tree) of your choice.
+% Example (linux):
+% \begin{quote}
+% |unzip oberdiek.tds.zip -d ~/texmf|
+% \end{quote}
+%
+% \paragraph{Script installation.}
+% Check the directory \xfile{TDS:scripts/oberdiek/} for
+% scripts that need further installation steps.
+% Package \xpackage{attachfile2} comes with the Perl script
+% \xfile{pdfatfi.pl} that should be installed in such a way
+% that it can be called as \texttt{pdfatfi}.
+% Example (linux):
+% \begin{quote}
+% |chmod +x scripts/oberdiek/pdfatfi.pl|\\
+% |cp scripts/oberdiek/pdfatfi.pl /usr/local/bin/|
+% \end{quote}
+%
+% \subsection{Package installation}
+%
+% \paragraph{Unpacking.} The \xfile{.dtx} file is a self-extracting
+% \docstrip\ archive. The files are extracted by running the
+% \xfile{.dtx} through \plainTeX:
+% \begin{quote}
+% \verb|tex ifluatex.dtx|
+% \end{quote}
+%
+% \paragraph{TDS.} Now the different files must be moved into
+% the different directories in your installation TDS tree
+% (also known as \xfile{texmf} tree):
+% \begin{quote}
+% \def\t{^^A
+% \begin{tabular}{@{}>{\ttfamily}l@{ $\rightarrow$ }>{\ttfamily}l@{}}
+% ifluatex.sty & tex/generic/oberdiek/ifluatex.sty\\
+% ifluatex.pdf & doc/latex/oberdiek/ifluatex.pdf\\
+% test/ifluatex-test1.tex & doc/latex/oberdiek/test/ifluatex-test1.tex\\
+% test/ifluatex-test2.tex & doc/latex/oberdiek/test/ifluatex-test2.tex\\
+% test/ifluatex-test3.tex & doc/latex/oberdiek/test/ifluatex-test3.tex\\
+% ifluatex.dtx & source/latex/oberdiek/ifluatex.dtx\\
+% \end{tabular}^^A
+% }^^A
+% \sbox0{\t}^^A
+% \ifdim\wd0>\linewidth
+% \begingroup
+% \advance\linewidth by\leftmargin
+% \advance\linewidth by\rightmargin
+% \edef\x{\endgroup
+% \def\noexpand\lw{\the\linewidth}^^A
+% }\x
+% \def\lwbox{^^A
+% \leavevmode
+% \hbox to \linewidth{^^A
+% \kern-\leftmargin\relax
+% \hss
+% \usebox0
+% \hss
+% \kern-\rightmargin\relax
+% }^^A
+% }^^A
+% \ifdim\wd0>\lw
+% \sbox0{\small\t}^^A
+% \ifdim\wd0>\linewidth
+% \ifdim\wd0>\lw
+% \sbox0{\footnotesize\t}^^A
+% \ifdim\wd0>\linewidth
+% \ifdim\wd0>\lw
+% \sbox0{\scriptsize\t}^^A
+% \ifdim\wd0>\linewidth
+% \ifdim\wd0>\lw
+% \sbox0{\tiny\t}^^A
+% \ifdim\wd0>\linewidth
+% \lwbox
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \end{quote}
+% If you have a \xfile{docstrip.cfg} that configures and enables \docstrip's
+% TDS installing feature, then some files can already be in the right
+% place, see the documentation of \docstrip.
+%
+% \subsection{Refresh file name databases}
+%
+% If your \TeX~distribution
+% (\teTeX, \mikTeX, \dots) relies on file name databases, you must refresh
+% these. For example, \teTeX\ users run \verb|texhash| or
+% \verb|mktexlsr|.
+%
+% \subsection{Some details for the interested}
+%
+% \paragraph{Attached source.}
+%
+% The PDF documentation on CTAN also includes the
+% \xfile{.dtx} source file. It can be extracted by
+% AcrobatReader 6 or higher. Another option is \textsf{pdftk},
+% e.g. unpack the file into the current directory:
+% \begin{quote}
+% \verb|pdftk ifluatex.pdf unpack_files output .|
+% \end{quote}
+%
+% \paragraph{Unpacking with \LaTeX.}
+% The \xfile{.dtx} chooses its action depending on the format:
+% \begin{description}
+% \item[\plainTeX:] Run \docstrip\ and extract the files.
+% \item[\LaTeX:] Generate the documentation.
+% \end{description}
+% If you insist on using \LaTeX\ for \docstrip\ (really,
+% \docstrip\ does not need \LaTeX), then inform the autodetect routine
+% about your intention:
+% \begin{quote}
+% \verb|latex \let\install=y\input{ifluatex.dtx}|
+% \end{quote}
+% Do not forget to quote the argument according to the demands
+% of your shell.
+%
+% \paragraph{Generating the documentation.}
+% You can use both the \xfile{.dtx} or the \xfile{.drv} to generate
+% the documentation. The process can be configured by the
+% configuration file \xfile{ltxdoc.cfg}. For instance, put this
+% line into this file, if you want to have A4 as paper format:
+% \begin{quote}
+% \verb|\PassOptionsToClass{a4paper}{article}|
+% \end{quote}
+% An example follows how to generate the
+% documentation with pdf\LaTeX:
+% \begin{quote}
+%\begin{verbatim}
+%pdflatex ifluatex.dtx
+%makeindex -s gind.ist ifluatex.idx
+%pdflatex ifluatex.dtx
+%makeindex -s gind.ist ifluatex.idx
+%pdflatex ifluatex.dtx
+%\end{verbatim}
+% \end{quote}
+%
+% \section{Catalogue}
+%
+% The following XML file can be used as source for the
+% \href{http://mirror.ctan.org/help/Catalogue/catalogue.html}{\TeX\ Catalogue}.
+% The elements \texttt{caption} and \texttt{description} are imported
+% from the original XML file from the Catalogue.
+% The name of the XML file in the Catalogue is \xfile{ifluatex.xml}.
+% \begin{macrocode}
+%<*catalogue>
+<?xml version='1.0' encoding='us-ascii'?>
+<!DOCTYPE entry SYSTEM 'catalogue.dtd'>
+<entry datestamp='$Date$' modifier='$Author$' id='ifluatex'>
+ <name>ifluatex</name>
+ <caption>Provides the \ifluatex switch.</caption>
+ <authorref id='auth:oberdiek'/>
+ <copyright owner='Heiko Oberdiek' year='2007,2009,2010'/>
+ <license type='lppl1.3'/>
+ <version number='1.4'/>
+ <description>
+ The package looks for LuaTeX regardless of its mode and provides
+ the switch <tt>\ifluatex</tt>; it works with Plain TeX or LaTeX.
+ <p/>
+ The package is part of the <xref refid='oberdiek'>oberdiek</xref>
+ bundle.
+ </description>
+ <documentation details='Package documentation'
+ href='ctan:/macros/latex/contrib/oberdiek/ifluatex.pdf'/>
+ <ctan file='true' path='/macros/latex/contrib/oberdiek/ifluatex.dtx'/>
+ <miktex location='oberdiek'/>
+ <texlive location='ifluatex'/>
+ <install path='/macros/latex/contrib/oberdiek/oberdiek.tds.zip'/>
+</entry>
+%</catalogue>
+% \end{macrocode}
+%
+% \begin{History}
+% \begin{Version}{2007/12/12 v1.0}
+% \item
+% First public version.
+% \end{Version}
+% \begin{Version}{2009/04/10 v1.1}
+% \item
+% Test adopted for \LuaTeX\ 0.39.
+% \item
+% Makes \cs{luatexversion} available.
+% \end{Version}
+% \begin{Version}{2009/04/17 v1.2}
+% \item
+% Fixes (Manuel P\'egouri\'e-Gonnard).
+% \item
+% \cs{luatextrue} and \cs{luatexfalse} are no longer defined.
+% \item
+% Makes \cs{luatexrevision} available, too.
+% \end{Version}
+% \begin{Version}{2010/03/01 v1.3}
+% \item
+% Line ends fixed in case \cs{endlinechar} = \cs{newlinechar}.
+% \end{Version}
+% \begin{Version}{2016/05/16 v1.4}
+% \item
+% Documentation updates.
+% \end{Version}
+% \end{History}
+%
+% \PrintIndex
+%
+% \Finale
+\endinput