%
% \iffalse
%
% scrtime.dtx Copyright (C) 1994 Markus Kohm
%
% This file is part of the LaTeX2e KOMA-Script-Bundle
%
% It should be distributed UNCHANGED and together with all other
% files in the KOMA-Script-Bundle. The file readme.txt contains a list
% of all these files.
%
% A modified version of this file may be distributed, but it should
% be distributed with a DIFFERENT name. Changed files must be
% distributed TOGETHER WITH A COMPLETE AND UNCHANGED distribution
% of these files.
%
% \CharacterTable
%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
%   Digits        \0\1\2\3\4\5\6\7\8\9
%   Exclamation   \!     Double quote  \"     Hash (number) \#
%   Dollar        \$     Percent       \%     Ampersand     \&
%   Acute accent  \'     Left paren    \(     Right paren   \)
%   Asterisk      \*     Plus          \+     Comma         \,
%   Minus         \-     Point         \.     Solidus       \/
%   Colon         \:     Semicolon     \;     Less than     \<
%   Equals        \=     Greater than  \>     Question mark \?
%   Commercial at \@     Left bracket  \[     Backslash     \\
%   Right bracket \]     Circumflex    \^     Underscore    \_
%   Grave accent  \`     Left brace    \{     Vertical bar  \|
%   Right brace   \}     Tilde         \~}
%
%<*dtx>
            \ProvidesFile{scrtime.dtx}
%</dtx>
%<scrtime|scrdate>\NeedsTeXFormat{LaTeX2e}[1994/12/01]
%<driver>   \ProvidesFile{scrtime.drv}
%<scrtime>\ProvidesPackage{scrtime}
%<scrdate>\ProvidesPackage{scrdate}
                [1995/05/24 v1.1c LaTeX2e KOMA
%<scrtime|scrdate>                 package]
%<*driver>
                 driver]
\documentclass{ltxdoc}
\usepackage[a4paper]{typearea}
\begin{document}
 \DocInput{scrtime.dtx}
\end{document}
%</driver>
% \fi
%
% \CheckSum{226}
% \GetFileInfo{scrtime.dtx}
% \title{The \textsf{KOMA}-timedate-bundle\thanks{This file has
%        version number \fileversion, last revised \filedate.}}
% \author{Markus Kohm}
% \date{\filedate}
% \maketitle
%
% \def\oarg#1{{\ttfamily[}{\em#1\/}{\ttfamily]}}
% \def\arg#1{{\ttfamily\char`\{}{\em#1\/}{\ttfamily\char`\}}}
% \def\star{{\ttfamily*}}
% \makeatletter
% \def\Describe@Macro#1{\endgroup
%              \setbox0=\lastbox\llap{\PrintDescribeMacro{#1}}}%
% \def\Describe@Env#1{\endgroup
%              \setbox0=\lastbox\llap{\PrintDescribeEnv{#1}}}%
% \makeatother
% \marginparsep0pt
%
% \begin{abstract}
% This bundle includes a package \texttt{scrtime} defining some
% macros to handle compilation-time.
% It's a very simple implementation similar to \texttt{time.sty}.
% I've tried to use no additional register.
%
% The second package \texttt{scrdate} defines some macros to
% handle the name of the day!
% \end{abstract}
%
% \tableofcontents
%
% \section{Introduction}
% \subsection{\texttt{scrtime}-package}
% \DescribeMacro
% \today\\
% \DescribeMacro
% \date\arg{today's-value}\\
% \DescribeMacro
% \thistime\oarg{hourseparator}\\
% \DescribeMacro
% \settime\arg{thistime's-value}\\
% At \LaTeX\ there's a macro |\today| to get compilation-date. There's
% a macro |\date| to set the value of |\today|, too. But to handle
% compilation-time there is only a macro |\time| which shows the
% gone minutes of the day.
%
% With the macro |\thistime| you get the actual time. The optional
% argument \oarg{hourseparator} is used to separate hours and minutes.
% Default-value is ``|:|''. |\thistime| writes values of minutes less than
% ten with prefix ``0''. |\thistime*| doesn't.
%
% With the macro |\settime| you may set the value of |\thistime|. After
% this the optional argument of |\thistime| will be ignored.
%
%
% \subsection{\texttt{scrdate}-package}
%
% At \LaTeX\ there are macros to get the actual day or month or year. Using
% |\today| you even may get the name of the month, but you will never get the
% name of the day.
%
% This package defines some macros to handle the name of the day.
%
% \begin{description}
% \item[Important:] If you use language-packages like \texttt{german} or
% \texttt{babel}, these \emph{must} be loaded \emph{after}
% \texttt{scrdate}-package. Otherwise the name of the day'll be wrong!
% \end{description}
%
% \noindent\texttt{scrdate} knows four languages:
% \begin{itemize}
% \item english
% \item USenglish
% \item german
% \item french
% \end{itemize}
%
% \DescribeMacro
% \newdaylanguage\arg{language}\arg{Monday}\arg{Tuesday}\arg{Wednesday}%
% \arg{Thursday}\arg{Friday}\arg{Saturday}\arg{Sunday}\\
% You may add additional languages using the configurationfile
% \texttt{scrdate.cfg}. There you have to define a macro
% |\dayname@|\emph{language}. You may use |\newdaylanguage| to do so.
%
%
% \DescribeMacro
% \todaysname\\
% shows the name of the actual day (defined by |\year|, |\month| and
% |\day| or by |\dayname|).
%
% \DescribeMacro
% \dayname\arg{Name}\\
% sets the name of the day to \arg{Name}.
%
%
% \StopEventually
%
% \section{Implementation}
% \subsection{Time-macros}
%
%    \begin{macrocode}
%<*scrtime>
%    \end{macrocode}
%
% \subsubsection{Options}
% \changes{v1.1b}{1995/02/15}{Options \texttt{12h} and \texttt{24h} added.}
% There are two the two Options |24h| and |12h|. We need a switch to
% distinguish.
%    \begin{macrocode}
\newif\if@Hxii
%    \end{macrocode}
%
% So the Options are simple.
%    \begin{macrocode}
\DeclareOption{12h}{\@Hxiitrue}
\DeclareOption{24h}{\@Hxiifalse}
%    \end{macrocode}
%
% Default is 24h-mode.
%    \begin{macrocode}
\ExecuteOptions{24h}
\ProcessOptions
%    \end{macrocode}
%
% \subsubsection{Macros}
% We use |\@tempcnta| and |\@tempcntb| but we know, that this is not
% a very good idea.
%
%  \begin{macro}{\thistime}
% \changes{v1.1b}{1995/02/15}{{\cmd\thistime*} added.}
% \changes{v1.1b}{1995/02/15}{{\cmd\thistime} works.}
% First we have to decide, is it a star-version ore not.
%    \begin{macrocode}
\def\thistime{%
  \@ifstar
    {\let\@tempif\iffalse\@thistime}
    {\let\@tempif\iftrue\@thistime}}
%    \end{macrocode}
% Know we have to calculate the hours and minutes. |\@tempcnta| are the
% hours and |\@tempcntb| are the minutes.
%    \begin{macrocode}
\newcommand*{\@thistime}[1][:]{%
  \begingroup
    \@tempcnta\time\divide\@tempcnta60\multiply\@tempcnta60
    \@tempcntb\time\advance\@tempcntb-\@tempcnta
    \divide\@tempcnta60
%    \end{macrocode}
% If we use 12h-mode, we have to cut the houres.
%    \begin{macrocode}
    \if@Hxii\ifnum\@tempcnta>12 \advance\@tempcnta-12\fi\fi
%    \end{macrocode}
% Know we have to compose the value. If minutes less than 10
% maybe there has to be an additional 0.
%    \begin{macrocode}
    \the\@tempcnta{#1}\@tempif\ifnum\@tempcntb<10 0\fi\fi\the\@tempcntb%
  \endgroup}
%    \end{macrocode}
%  \end{macro}
%
%  \begin{macro}{\settime}
% \changes{v1.1b}{1995/02/15}{{\cmd\settime} redefines {\cmd\@thistime}}
% \changes{v1.1c}{1995/05/24}{missing macrocode-environment inserted}
% We simply have to set |\thistime|.
%    \begin{macrocode}
\newcommand*{\settime}[1]{\renewcommand*{\@thistime}[1][]{#1}}
%    \end{macrocode}
%  \end{macro}
%
%
% That's it:
%    \begin{macrocode}
%</scrtime>
%    \end{macrocode}
%
%
% \subsection{Date-macros}
%
%    \begin{macrocode}
%<*scrdate>
%    \end{macrocode}
%
% \changes{v1.1a}{1995/02/12}{Changed simply all but the user-interface.}
% To handle them, we need counters. We use same as in \texttt{scrtime}.
%
%  \begin{macro}{\todaysname}
% This is not so easy. First we have to calculate how many days they are
% from 1st January 1980.
%    \begin{macrocode}
\newcommand\todaysname{%
  \begingroup%
  \@tempcnta=\year
  \@tempcntb=1 % 1. Januar 1980 war ein Dienstag
  \ifnum\@tempcnta<1980 unknown\else%
    \advance\@tempcnta by-1980%
    \@whilenum\@tempcnta>3\do%
    {\advance\@tempcntb by5\advance\@tempcnta by-4}%
    \ifnum\@tempcnta=0%
      \ifnum\month>2\advance \@tempcntb by1\fi%
    \else%
      \advance\@tempcntb by\@tempcnta%
      \advance\@tempcntb by1
    \fi%
    \ifcase\month\or\or\advance\@tempcntb3%  Jan =  28 + 3
                    \or\advance\@tempcntb3% +Feb =  56 + 3
                    \or\advance\@tempcntb6% +Mar =  84 + 6
                    \or\advance\@tempcntb1% +Apr = 119 + 1
                    \or\advance\@tempcntb4% +May = 147 + 4
                    \or\advance\@tempcntb6% +Jun = 175 + 6
                    \or\advance\@tempcntb2% +Jul = 210 + 2
                    \or\advance\@tempcntb5% +Aug = 238 + 5
                    \or%                    +Sep = 273 + 0
                    \or\advance\@tempcntb3% +Oct = 301 + 3
                    \or\advance\@tempcntb5% +Nov = 329 + 5
    \fi%
    \advance\@tempcntb by\day%
    \advance\@tempcntb by-1% Die Zaehlung beginnt bei 0
    \@whilenum\@tempcntb>6\do%
    {\advance\@tempcntb by-7}%
%    \end{macrocode}
% Now we can say which day it is.
%    \begin{macrocode}
    \@dayname{\@tempcntb}%
  \fi\endgroup}
%    \end{macrocode}
%  \end{macro}
%
%  \begin{macro}{\nameday}
% We simply have to redefine |\todaysname|
%    \begin{macrocode}
\newcommand\nameday[1]{\renewcommand\todaysname{#1}}
%    \end{macrocode}
%  \end{macro}
%
%  \begin{macro}{\newdaylanguage}
% We write a macro to define the name of the days.
%    \begin{macrocode}
\newcommand\newdaylanguage[8]{%
%    \end{macrocode}
% First we check, if the language is defined at the format, the user uses.
% If it is not defined, we do not define the name of the days and warn.
%    \begin{macrocode}
  \expandafter\ifx\csname l@#1\endcsname\relax
    \PackageWarningNoLine{scrdate}{Language #1\space not defined.\MessageBreak
                                  \protect\dayname@#1\space skipped!}
%    \end{macrocode}
% \changes{v1.1c}{1995/05/24}{missing {\cmd\end{macrocode}} added.}
% If it is defined, we define the name-selection-macro
% |\dayname@|\emph{language}.
% First we define the new macro |\dayname@|\emph{language}:
%    \begin{macrocode}
  \else
    \@namedef{dayname@#1}##1{%
      \begingroup%
        \@tempcnta ##1%
        \ifcase\@tempcnta%
          #2\or #3\or #4\or #5\or #6\or #7\or #8\fi\endgroup%
    }
%    \end{macrocode}
% Then we define, what to do at |\begin{document}|:
%    \begin{macrocode}
    \AtBeginDocument{
%    \end{macrocode}
% There we first have to test, if |\date|\emph{language} is defined
% (e.g. using |german.sty|). If not, we have to warn once more.
%    \begin{macrocode}
      \expandafter\ifx\csname date#1\endcsname\relax
        \PackageWarningNoLine{scrdate}
                             {\protect\date#1\space not defined.\MessageBreak
                              \protect\todaysname maybe can't use
                              \protect\dayname@#1!}
%    \end{macrocode}
% But if it is defined, we can use it
%    \begin{macrocode}
      \else
%    \end{macrocode}
% There we first save |\date|\emph{language} as |\D@date|\emph{language}.
% This is a bit tricky, but I think, you'll understand it.
%    \begin{macrocode}
        \expandafter\let\csname D@date#1\expandafter\endcsname
                        \csname date#1\endcsname
%    \end{macrocode}
% Now we redefine |\date|\emph{language}. It first defines |\@dayname| and
% then calls saved macro. If you've understand the definition before, you'll
% understand this tricky one, too.
%    \begin{macrocode}
        \@namedef{date#1}{%
          \expandafter\let\expandafter\@dayname\csname dayname@#1\endcsname
          \@nameuse{D@date#1}}%
%    \end{macrocode}
% Last we have to select this new |\date|\emph{language}.
%    \begin{macrocode}
        \ifnum\language=\@nameuse{l@#1}
          \@nameuse{date#1}
        \fi
      \fi
    }
  \fi
}
%    \end{macrocode}
%  \end{macro}
%
%  \begin{macro}{\@dayname}
% This should be named selecting the language. Since I changed the definitions
% |german.sty| and equal may be loaded before or after |scrdate.sty| or not.
%
% First we define the usual languages using |\newdaylanguage|:
%  \begin{macro}{\dayname@german}
%    \begin{macrocode}
\newdaylanguage{german}{Montag}{Dienstag}{Mittwoch}
               {Donnerstag}{Freitag}{Samstag}{Sonntag}
%    \end{macrocode}
%  \end{macro}
%  \begin{macro}{\dayname@english}
%    \begin{macrocode}
\newdaylanguage{english}{Monday}{Thuesday}{Wednesday}
               {Thursday}{Friday}{Saturday}{Sunday}
%    \end{macrocode}
%  \end{macro}
%  \begin{macro}{\dayname@USenglish}
%    \begin{macrocode}
\newdaylanguage{USenglish}{Monday}{Thuesday}{Wednesday}
               {Thursday}{Friday}{Saturday}{Sunday}
%    \end{macrocode}
%  \end{macro}
%  \begin{macro}{\dayname@french}
%    \begin{macrocode}
\newdaylanguage{french}{Lundi}{Mardi}{Mercredi}
               {Jeudi}{Vendredi}{Samedi}{Dimanche}
%    \end{macrocode}
%  \end{macro}
%
% If there are no language-definitions, we simply want the US-english names
% of the days.
%    \begin{macrocode}
\def\@dayname#1{%
  \begingroup%
    \@tempcnta #1%
    \ifcase\@tempcnta%
      Monday\or Thuesday\or Wednesday\or Thursday\or
      Friday\or Saturday\or Sunday\fi\endgroup%
}
%    \end{macrocode}
%  \end{macro}
%
% Last but not least file \texttt{scrdate.cfg} has to be included, if it exists.
%    \begin{macrocode}
\InputIfFileExists{scrdate.cfg}
           {\typeout{*************************************^^J%
                     * Local config file scrdate.cfg used^^J%
                     *************************************}}
           {}
%    \end{macrocode}
%
% That's it:
%    \begin{macrocode}
%</scrdate>
%    \end{macrocode}
%
%
% \Finale
%
\endinput