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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 26.9, p. III-370.
-% Original source in file "macros6.TEX", starting line 541.
-\wlog{L: "isleapyr.tip" ["macros6.TEX," l. 541, p. III-370]}%
-% This file DOES belong to format "texip."
-\InputD{imodn.tip}
-\catcode`\@ = 11
-\newif\if@LeapYear
-\def\LeapYearConditional #1{%
- TT\fi
- {%
- \count0 = #1\relax
- \IModN{\count0}{4}{\count1}%
- \ifnum\count1 = 0
- \global\@LeapYeartrue
- \IModN{\count0}{100}{\count2}%
- \IModN{\count0}{400}{\count3}%
- \ifnum\count2 = 0
- \global\@LeapYearfalse
- \fi
- \ifnum\count3 = 0
- \global\@LeapYeartrue
- \fi
- \else
- \global\@LeapYearfalse
- \fi
- }%
- \if@LeapYear
-}
-\catcode`\@ = 12