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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 26.1, p. III-357.
% Original source in file "macros6.TEX", starting line 39.
\wlog{L: "earliest.tip" ["macros6.TEX," l. 39, p. III-357]}%
% This file DOES belong to format "texip."
\InputD{dateofw.tip}
\InputD{arbday.tip}
\catcode`\@ = 11
\newcount\@TempEarliest
\newcount\EarliestYearDate
\EarliestYearDate = 1583
\newcount\DayOfWeekOfEarliestDate
\DayOfWeekOfEarliestDate = \Saturday
\def\VerifyInitDate{%
{%
\ArbitraryDayOfWeek{2000}{1}{1}{\@TempEarliest}%
\ifnum\@TempEarliest = \Saturday
\message{\string\VerifyInitDate: initialization
correct (initialization year:
\the\EarliestYearDate).}%
\else
\errmessage{\string\VerifyInitDate: January 1 of 2000
is a Saturday! Computation reports it is
day \the\@TempEarliest\space. Initialization error.}%
\fi
}%
}
\catcode`\@ = 12
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