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-% File: ifpdf.sty
-% Version: 2005/07/22 v1.3
-% Author: Heiko Oberdiek
-% Email: <oberdiek@uni-freiburg.de>
-%
-% Copyright: Copyright (C) 2001, 2005 Heiko Oberdiek.
-%
-% 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 2003/12/01 or later.
-%
-% This work has the LPPL maintenance status "maintained".
-%
-% This Current Maintainer of this work is Heiko Oberdiek.
-%
-% Function: This package looks for pdfTeX in pdf mode and
-% implements and sets the switch \ifpdf.
-% The detection is based on \pdfoutput and
-% the package will not change this value.
-% It works with plain or LaTeX formats.
-%
-% Use: LaTeX: \usepackage{ifpdf}
-% plain: \input ifpdf.sty
-% The package provides the switch \ifpdf:
-% \ifpdf
-% ... do things, if pdfTeX is running in pdf mode ...
-% \else
-% ... other TeX or pdfTeX in dvi mode ...
-% \fi
-% The package can also be used to set global
-% documentclass options:
-% \RequirePackage{ifpdf}
-% \ifpdf
-% \documentclass[pdftex,...]{...}
-% \else
-% \documentclass[...]{...}
-% \fi
-%
-% Installation:
-% CTAN location: CTAN:macros/latex/contrib/oberdiek/ifpdf.sty
-% TDS location: TDS:tex/generic/oberdiek/ifpdf.sty
-% (Rationale: ifpdf.sty can be used with both plain and
-% LaTeX formats.)
-%
-% History: 2001/06/14 v1.0:
-% * first public version,
-% 2001/07/14 v1.1:
-% * documentation addition: global options
-% 2001/09/26 v1.2:
-% * documentation typo corrected.
-% * version number corrected.
-% * line number in log entry removed.
-% 2005/07/22 v1.3:
-% * Some source code comments from Robin Fairbairns added.
-% * Bug fix for negative values of \pdfoutput
-% (Oleg Katsitadze)
-% * LPPL 1.3
-% * Installation section with locations added.
-%
-% Prevent reloading more than one:
-\begingroup
- \expandafter\let\expandafter\x\csname ver@ifpdf.sty\endcsname
- \ifcase 0%
- \ifx\x\relax % plain
- \else
- \ifx\x\empty % LaTeX
- \else
- 1%
- \fi
- \fi
- \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{ifpdf}{The package is already loaded}%
- \endgroup
- \expandafter\endinput
- \fi
-\endgroup
-%
-% Package identification:
-\begingroup
- \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\relax
- \xdef#1{#3}%
- \fi
- }%
- \fi
-\expandafter\x\csname ver@ifpdf.sty\endcsname
-\ProvidesPackage{ifpdf}%
- [2005/07/22 v1.3 %
- Providing \expandafter\string\csname ifpdf\endcsname\space (HO)]
-%
-% Check, whether \ifpdf is already defined:
-\begingroup
- \expandafter\ifx\csname ifpdf\endcsname\relax
- \else
- \edef\i/{\expandafter\string\csname ifpdf\endcsname}%
- \expandafter\ifx\csname PackageError\endcsname\relax
- \def\x#1#2{%
- \edef\z{#2}%
- \expandafter\errhelp\expandafter{\z}%
- \errmessage{Package ifpdf Error: #1}%
- }%
- \def\y{^^J}%
- \newlinechar=10
- \else
- \def\x#1#2{%
- \PackageError{ifpdf}{#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\endinput
- \fi
-\endgroup
-%
-% Implementing the switch:
-\newif\ifpdf
-% so \pdffalse, initally
-\ifx\pdfoutput\undefined
-\else
- \ifx\pdfoutput\relax
-% \pdfoutput was undefined, but someone has used LaTeX internal
-% \@ifundefined, or something else involving \csname pdfoutput\endcsname
- \else
- \ifnum\pdfoutput<1 %
-% \pdfoutput=0 or negative, so not generating pdf
- \else
- \pdftrue
- \fi
- \fi
-\fi
-%
-% Log comment:
-\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{ifpdf}{pdfTeX in pdf mode \ifpdf\else not \fi detected}%
-\endgroup
-\endinput