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% This macro source file is from the four volume series
% "TeX in Practice" by Stephan von Bechtolsheim, published
% 1993 by Springer-Verlag, New York.
% Copyright 1993 Stephan von Bechtolsheim.
% No warranty or liability is assumed.
% This macro may be copied freely if no fees other than
% media cost or shipping charges are charged and as long
% as this copyright and the following source code itself
% is not changed. Please see the series for further information.
%
% Version: 1.0
% Date: May 1, 1993
%
%
% This source code is documented in 28.4.1, p. III-465.
% Original source in file "io1.TEX", starting line 910.
\wlog{L: "fexist.tip" ["io1.TEX," l. 910, p. III-465]}%
% This file DOES belong to format "texip."
\catcode`\@ = 11
\newread\@FileExistsS
\newif\if@FileExistsAnswer
\def\FileExistsConditional #1{%
TT\fi
\openin\@FileExistsS = #1
\ifeof\@FileExistsS
\@FileExistsAnswerfalse
\else
\closein\@FileExistsS
\@FileExistsAnswertrue
\fi
\if@FileExistsAnswer
}
\catcode`\@ = 12
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