Current File : //proc/self/root/usr/share/texlive/texmf-dist/tex/generic/ifxetex/ifxetex.sty
% \iffalse
% Copyright 2006-2010 by Will Robertson <wspr81@gmail.com>
%
% Distributable under the LaTeX Project Public License,
% version 1.3c or higher (your choice). The latest version of
% this license is at: http://www.latex-project.org/lppl.txt
%
% This work is maintained by Will Robertson.
% \fi
% Ensure loading a single time only.
\csname ifxetexloaded\endcsname
\let\ifxetexloaded\endinput
% Declare ourselves to \LaTeX.
\begingroup\expandafter\expandafter\expandafter\endgroup
\expandafter\ifx\csname ProvidesPackage\endcsname\relax\else
\ProvidesPackage{ifxetex}
[2010/09/12 v0.6 Provides ifxetex conditional]
\fi
% For \XeTeX-exclusive packages.
\def\RequireXeTeX{%
\ifxetex\else
\begingroup
\errorcontextlines=-1\relax
\newlinechar=10\relax
\errmessage{^^J
********************************************^^J
* XeTeX is required to compile this document.^^J
* Sorry!^^J
********************************************}%
\endgroup
\fi}
% Abort if \cmd\ifxetex\ is already defined
% (assume that it has already been set correctly)^^A
% \footnote{Thanks to \textit{Dan Luecking} for suggesting this.}
\expandafter\ifx\csname ifxetex\endcsname\relax\else
\expandafter\endinput
\fi
% Create and set \cmd\ifxetex\ accordingly.
\newif\ifxetex
\begingroup\expandafter\expandafter\expandafter\endgroup
\expandafter\ifx\csname XeTeXrevision\endcsname\relax
\xetexfalse
\else
\xetextrue
\fi
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