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-% \iffalse meta-comment
-%
-% File: ifvtex.dtx
-% Version: 2016/05/16 v1.6
-% Info: Detect VTeX and its facilities
-%
-% Copyright (C) 2001, 2006-2008, 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 ifvtex.dtx
-% and the derived files
-% ifvtex.sty, ifvtex.pdf, ifvtex.ins, ifvtex.drv, ifvtex-test1.tex.
-%
-% Distribution:
-% CTAN:macros/latex/contrib/oberdiek/ifvtex.dtx
-% CTAN:macros/latex/contrib/oberdiek/ifvtex.pdf
-%
-% Unpacking:
-% (a) If ifvtex.ins is present:
-% tex ifvtex.ins
-% (b) Without ifvtex.ins:
-% tex ifvtex.dtx
-% (c) If you insist on using LaTeX
-% latex \let\install=y\input{ifvtex.dtx}
-% (quote the arguments according to the demands of your shell)
-%
-% Documentation:
-% (a) If ifvtex.drv is present:
-% latex ifvtex.drv
-% (b) Without ifvtex.drv:
-% latex ifvtex.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 ifvtex.dtx
-% makeindex -s gind.ist ifvtex.idx
-% pdflatex ifvtex.dtx
-% makeindex -s gind.ist ifvtex.idx
-% pdflatex ifvtex.dtx
-%
-% Installation:
-% TDS:tex/generic/oberdiek/ifvtex.sty
-% TDS:doc/latex/oberdiek/ifvtex.pdf
-% TDS:doc/latex/oberdiek/test/ifvtex-test1.tex
-% TDS:source/latex/oberdiek/ifvtex.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: ifvtex 2016/05/16 v1.6 Detect VTeX and its facilities (HO)}
-\Msg{************************************************************************}
-
-\keepsilent
-\askforoverwritefalse
-
-\let\MetaPrefix\relax
-\preamble
-
-This is a generated file.
-
-Project: ifvtex
-Version: 2016/05/16 v1.6
-
-Copyright (C) 2001, 2006-2008, 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 ifvtex.dtx
-and the derived files
- ifvtex.sty, ifvtex.pdf, ifvtex.ins, ifvtex.drv, ifvtex-test1.tex.
-
-\endpreamble
-\let\MetaPrefix\DoubleperCent
-
-\generate{%
- \file{ifvtex.ins}{\from{ifvtex.dtx}{install}}%
- \file{ifvtex.drv}{\from{ifvtex.dtx}{driver}}%
- \usedir{tex/generic/oberdiek}%
- \file{ifvtex.sty}{\from{ifvtex.dtx}{package}}%
-% \usedir{doc/latex/oberdiek/test}%
-% \file{ifvtex-test1.tex}{\from{ifvtex.dtx}{test1}}%
- \nopreamble
- \nopostamble
-% \usedir{source/latex/oberdiek/catalogue}%
-% \file{ifvtex.xml}{\from{ifvtex.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{* ifvtex.sty}
-\Msg{*}
-\Msg{* To produce the documentation run the file `ifvtex.drv'}
-\Msg{* through LaTeX.}
-\Msg{*}
-\Msg{* Happy TeXing!}
-\Msg{*}
-\Msg{************************************************************************}
-
-\endbatchfile
-%</install>
-%<*ignore>
-\fi
-%</ignore>
-%<*driver>
-\NeedsTeXFormat{LaTeX2e}
-\ProvidesFile{ifvtex.drv}%
- [2016/05/16 v1.6 Detect VTeX and its facilities (HO)]%
-\documentclass{ltxdoc}
-\usepackage{holtxdoc}[2011/11/22]
-\begin{document}
- \DocInput{ifvtex.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{ifvtex.drv}
-%
-% \title{The \xpackage{ifvtex} package}
-% \date{2016/05/16 v1.6}
-% \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 \VTeX, implements
-% and sets the switches \cs{ifvtex}, \cs{ifvtex}\texttt{\meta{mode}},
-% \cs{ifvtexgex}. It works with plain or \LaTeX\ formats.
-% \end{abstract}
-%
-% \tableofcontents
-%
-% \section{Usage}
-%
-% The package \xpackage{ifvtex} can be used with both \plainTeX\
-% and \LaTeX:
-% \begin{description}
-% \item[\plainTeX:] |\input ifvtex.sty|
-% \item[\LaTeXe:] |\usepackage{ifvtex}|\\
-% \end{description}
-%
-% The package implements switches for \VTeX\ and its different
-% modes and interprets \cs{VTeXversion}, \cs{OpMode}, and \cs{gexmode}.
-%
-% \begin{declcs}{ifvtex}
-% \end{declcs}
-% The package provides the switch \cs{ifvtex}:
-% \begin{quote}
-% |\ifvtex|\\
-% \hspace{1.5em}\dots\ do things, if \VTeX\ is running \dots\\
-% |\else|\\
-% \hspace{1.5em}\dots\ other \TeX\ compiler \dots\\
-% |\fi|
-% \end{quote}
-% Users of the package \xpackage{ifthen} can use the switch as boolean:
-% \begin{quote}
-% |\boolean{ifvtex}|
-% \end{quote}
-%
-% \begin{declcs}{ifvtexdvi}\\
-% \cs{ifvtexpdf}\SpecialUsageIndex{\ifvtexpdf}\\
-% \cs{ifvtexps}\SpecialUsageIndex{\ifvtexps}\\
-% \cs{ifvtexhtml}\SpecialUsageIndex{\ifvtexhtml}
-% \end{declcs}
-% \VTeX\ knows different output modes that can be asked by these
-% switches.
-%
-% \begin{declcs}{ifvtexgex}
-% \end{declcs}
-% This switch shows, whether GeX is available.
-%
-% \StopEventually{
-% }
-%
-% \section{Implemenation}
-%
-% \subsection{Reload check and package identification}
-%
-% \begin{macrocode}
-%<*package>
-% \end{macrocode}
-% 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@ifvtex.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{ifvtex}{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@ifvtex.sty\endcsname
-\ProvidesPackage{ifvtex}%
- [2016/05/16 v1.6 Detect VTeX and its facilities (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 ifvtex@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\ifvtex@AtEnd{%
- \ifvtex@AtEnd
- \catcode#1=\the\catcode#1\relax
- }%
- \catcode#1=#2\relax
-}
-\TMP@EnsureCode{10}{12}% ^^J
-\TMP@EnsureCode{39}{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{62}{12}% >
-\TMP@EnsureCode{94}{7}% ^
-\TMP@EnsureCode{96}{12}% `
-\edef\ifvtex@AtEnd{\ifvtex@AtEnd\noexpand\endinput}
-% \end{macrocode}
-%
-% \subsection{Check for previously defined \cs{ifvtex}}
-%
-% \begin{macrocode}
-\begingroup
- \expandafter\ifx\csname ifvtex\endcsname\relax
- \else
- \edef\i/{\expandafter\string\csname ifvtex\endcsname}%
- \expandafter\ifx\csname PackageError\endcsname\relax
- \def\x#1#2{%
- \edef\z{#2}%
- \expandafter\errhelp\expandafter{\z}%
- \errmessage{Package ifvtex Error: #1}%
- }%
- \def\y{^^J}%
- \newlinechar=10 %
- \else
- \def\x#1#2{%
- \PackageError{ifvtex}{#1}{#2}%
- }%
- \def\y{\MessageBreak}%
- \fi
- \x{Name clash, \i/ is already defined}{%
- Incompatible versions of \i/ can cause problems,\y
- therefore package loading is aborted.%
- }%
- \endgroup
- \expandafter\ifvtex@AtEnd
- \fi%
-\endgroup
-% \end{macrocode}
-%
-% \subsection{Provide \cs{newif}}
-%
-% \begin{macrocode}
-\begingroup\expandafter\expandafter\expandafter\endgroup
-\expandafter\ifx\csname newif\endcsname\relax
-% \end{macrocode}
-% \begin{macro}{\ifvtex@newif}
-% \begin{macrocode}
- \def\ifvtex@newif#1{%
- \begingroup
- \escapechar=-1 %
- \expandafter\endgroup
- \expandafter\ifvtex@@newif\string#1\@nil
- }%
-% \end{macrocode}
-% \end{macro}
-% \begin{macro}{\ifvtex@@newif}
-% \begin{macrocode}
- \def\ifvtex@@newif#1#2#3\@nil{%
- \expandafter\edef\csname#3true\endcsname{%
- \let
- \expandafter\noexpand\csname if#3\endcsname
- \expandafter\noexpand\csname iftrue\endcsname
- }%
- \expandafter\edef\csname#3false\endcsname{%
- \let
- \expandafter\noexpand\csname if#3\endcsname
- \expandafter\noexpand\csname iffalse\endcsname
- }%
- \csname#3false\endcsname
- }%
-% \end{macrocode}
-% \end{macro}
-% \begin{macrocode}
-\else
-% \end{macrocode}
-% \begin{macro}{\ifvtex@newif}
-% \begin{macrocode}
- \expandafter\let\expandafter\ifvtex@newif\csname newif\endcsname
-\fi
-% \end{macrocode}
-% \end{macro}
-%
-% \subsection{\cs{ifvtex}}
-%
-% \begin{macro}{\ifvtex}
-% Create and set the switch. \cs{newif} initializes the
-% switch with \cs{iffalse}.
-% \begin{macrocode}
-\ifvtex@newif\ifvtex
-% \end{macrocode}
-% \begin{macrocode}
-\begingroup\expandafter\expandafter\expandafter\endgroup
-\expandafter\ifx\csname VTeXversion\endcsname\relax
-\else
- \begingroup\expandafter\expandafter\expandafter\endgroup
- \expandafter\ifx\csname OpMode\endcsname\relax
- \else
- \vtextrue
- \fi
-\fi
-% \end{macrocode}
-% \end{macro}
-%
-% \subsection{Mode and GeX switches}
-%
-% \begin{macrocode}
-\ifvtex@newif\ifvtexdvi
-\ifvtex@newif\ifvtexpdf
-\ifvtex@newif\ifvtexps
-\ifvtex@newif\ifvtexhtml
-\ifvtex@newif\ifvtexgex
-\ifvtex
- \ifcase\OpMode\relax
- \vtexdvitrue
- \or % 1
- \vtexpdftrue
- \or % 2
- \vtexpstrue
- \or % 3
- \vtexpstrue
- \or\or\or\or\or\or\or % 10
- \vtexhtmltrue
- \fi
- \begingroup\expandafter\expandafter\expandafter\endgroup
- \expandafter\ifx\csname gexmode\endcsname\relax
- \else
- \ifnum\gexmode>0 %
- \vtexgextrue
- \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{ifvtex}{%
- VTeX %
- \ifvtex
- in \ifvtexdvi DVI\fi
- \ifvtexpdf PDF\fi
- \ifvtexps PS\fi
- \ifvtexhtml HTML\fi
- \space mode %
- with\ifvtexgex\else out\fi\space GeX %
- \else
- not %
- \fi
- detected%
- }%
-\endgroup
-% \end{macrocode}
-%
-% \begin{macrocode}
-\ifvtex@AtEnd%
-%</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 ifvtex.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{Installation}
-%
-% \subsection{Download}
-%
-% \paragraph{Package.} This package is available on
-% CTAN\footnote{\url{http://ctan.org/pkg/ifvtex}}:
-% \begin{description}
-% \item[\CTAN{macros/latex/contrib/oberdiek/ifvtex.dtx}] The source file.
-% \item[\CTAN{macros/latex/contrib/oberdiek/ifvtex.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 ifvtex.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@{}}
-% ifvtex.sty & tex/generic/oberdiek/ifvtex.sty\\
-% ifvtex.pdf & doc/latex/oberdiek/ifvtex.pdf\\
-% test/ifvtex-test1.tex & doc/latex/oberdiek/test/ifvtex-test1.tex\\
-% ifvtex.dtx & source/latex/oberdiek/ifvtex.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 ifvtex.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{ifvtex.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 ifvtex.dtx
-%makeindex -s gind.ist ifvtex.idx
-%pdflatex ifvtex.dtx
-%makeindex -s gind.ist ifvtex.idx
-%pdflatex ifvtex.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{ifvtex.xml}.
-% \begin{macrocode}
-%<*catalogue>
-<?xml version='1.0' encoding='us-ascii'?>
-<!DOCTYPE entry SYSTEM 'catalogue.dtd'>
-<entry datestamp='$Date$' modifier='$Author$' id='ifvtex'>
- <name>ifvtex</name>
- <caption>Detects use of VTeX and its facilities.</caption>
- <authorref id='auth:oberdiek'/>
- <copyright owner='Heiko Oberdiek' year='2001,2006-2008,2010'/>
- <license type='lppl1.3'/>
- <version number='1.6'/>
- <description>
- The package looks for VTeX and sets the switch <tt>\ifvtex</tt>.
- In the presence of VTeX, the mode switches <tt>\ifvtexdvi</tt>,
- <tt>\ifvtexpdf</tt> and <tt>\ifvtexps</tt> are set;
- <tt>\ifvtexgex</tt> tells you whether GeX is operating.
- <p/>
- The package is part of the <xref refid='oberdiek'>oberdiek</xref> bundle.
- </description>
- <documentation details='Package documentation'
- href='ctan:/macros/latex/contrib/oberdiek/ifvtex.pdf'/>
- <ctan file='true' path='/macros/latex/contrib/oberdiek/ifvtex.dtx'/>
- <miktex location='oberdiek'/>
- <texlive location='oberdiek'/>
- <install path='/macros/latex/contrib/oberdiek/oberdiek.tds.zip'/>
-</entry>
-%</catalogue>
-% \end{macrocode}
-%
-% \begin{History}
-% \begin{Version}{2001/09/26 v1.0}
-% \item
-% First public version.
-% \end{Version}
-% \begin{Version}{2006/02/20 v1.1}
-% \item
-% DTX framework.
-% \item
-% Undefined tests changed.
-% \end{Version}
-% \begin{Version}{2007/01/10 v1.2}
-% \item
-% Fix of the \cs{ProvidesPackage} description.
-% \end{Version}
-% \begin{Version}{2007/09/09 v1.3}
-% \item
-% Catcode section added.
-% \end{Version}
-% \begin{Version}{2008/11/04 v1.4}
-% \item
-% Bug fix: Mispelled \cs{OpMode} (found by Hideo Umeki).
-% \end{Version}
-% \begin{Version}{2010/03/01 v1.5}
-% \item
-% Compatibility with ini\TeX.
-% \end{Version}
-% \begin{Version}{2016/05/16 v1.6}
-% \item
-% Documentation updates.
-% \end{Version}
-% \end{History}
-%
-% \PrintIndex
-%
-% \Finale
-\endinput