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Diffstat (limited to 'info/examples/tex-in-practice/isleapyr.tip')
-rw-r--r-- | info/examples/tex-in-practice/isleapyr.tip | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/info/examples/tex-in-practice/isleapyr.tip b/info/examples/tex-in-practice/isleapyr.tip new file mode 100644 index 0000000000..e35bd6c9d1 --- /dev/null +++ b/info/examples/tex-in-practice/isleapyr.tip @@ -0,0 +1,43 @@ +% 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 |