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Diffstat (limited to 'info/examples/tip/prevmon.tip')
-rw-r--r-- | info/examples/tip/prevmon.tip | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/info/examples/tip/prevmon.tip b/info/examples/tip/prevmon.tip new file mode 100644 index 0000000000..9513222954 --- /dev/null +++ b/info/examples/tip/prevmon.tip @@ -0,0 +1,31 @@ +% 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 26.15, p. III-379. +% Original source in file "macros6.TEX", starting line 1035. +\wlog{L: "prevmon.tip" ["macros6.TEX," l. 1035, p. III-379]}% +% This file DOES belong to format "texip." +\InputD{legdate.tip} +\catcode`\@ = 11 +\def\PrevMonth #1#2#3#4{% + \CheckDate{#1}{#2}{1}% + #3 = #1\relax + #4 = #2\relax + \advance #4 by -1 + \ifnum #4 = 0 + #4 = 12 + \advance #3 by -1 + \fi +} +\catcode`\@ = 12 |