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Diffstat (limited to 'info/examples/tex-in-practice/fexist.tip')
-rw-r--r-- | info/examples/tex-in-practice/fexist.tip | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/info/examples/tex-in-practice/fexist.tip b/info/examples/tex-in-practice/fexist.tip new file mode 100644 index 0000000000..5a595f141e --- /dev/null +++ b/info/examples/tex-in-practice/fexist.tip @@ -0,0 +1,33 @@ +% 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 |