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Diffstat (limited to 'info/examples/tex-in-practice/prevday.tip')
-rw-r--r-- | info/examples/tex-in-practice/prevday.tip | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/info/examples/tex-in-practice/prevday.tip b/info/examples/tex-in-practice/prevday.tip new file mode 100644 index 0000000000..2e4c8829be --- /dev/null +++ b/info/examples/tex-in-practice/prevday.tip @@ -0,0 +1,37 @@ +% 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 26.12, p. III-374. +% Original source in file "macros6.TEX", starting line 773. +\wlog{L: "prevday.tip" ["macros6.TEX," l. 773, p. III-374]}% +% This file DOES belong to format "texip." +\InputD{legdate.tip} +\InputD{ndaysmo.tip} +\InputD{copydate.tip} +\catcode`\@ = 11 +\newcount\@TempPrevDay +\def\PrevDay #1#2#3#4#5#6{% + \CheckDate{#1}{#2}{#3}% + \CopyDate{#1}{#2}{#3}{#4}{#5}{#6}% + \advance #6 by -1 + \ifnum #6 = 0 + \advance #5 by -1 + \ifnum #5 = 0 + #5 = 12 + \advance #4 by -1 + \fi + \NumberOfDaysInMonth{#4}{#5}{#6}% + \fi +} +\catcode`\@ = 12 |