\def\fileversion{1.0a}
\def\filedate{89/05/10}
\def\docdate{89/05/17}
\iffalse
% Style-option `underlin' to use with LaTeX v2.09
% Copyright (C) 1987, 1989 Rainer Schoepf, all rights reserved.
% Copying of this file is authorized only if either
% (1) you make absolutely no changes to your copy, including name, or
% (2) if you do make changes, you name it something other than
%     underlin.sty.
% This restriction helps ensure that all styles developed at Mainz
% are identical.
% Please send bug reports to:
%                          R.~Sch\"opf
% 			   Institut f\"ur Physik
%                          JoGu Universit"at
%                          D-6500 Mainz
%                          Federal Republic of Germany
%                 Bitnet:  <SCHOEPF@DMZNAT51>
% \title{Two {\sf pagestyles} for underlining headers\thanks{This file
%        has version number \fileversion, last
%        revised \filedate, documentation dated \docdate.}}
% \author{Rainer Sch\"opf \\
%         Institut f\"ur Physik \\
%         Johannes Gutenberg Universit\"at Mainz}
% \date{\quad}
% \maketitle
% \begin{abstract}
%   This style option implements two new {\sf pagestyles}
%   {\tt underline} and {\tt myunderline} that are similar
%   to the standard {\tt headings} and {\tt myheadings}
%   {\sf pagestyles} but provide a horizontal line just below
%   the head line.
% \end{abstract}
% The purpose of this style option file is to provide a way to
% underline a running head.
% This is done by redefining the \verb+\@evenhead+ and \verb+\@oddhead+
% macros.
% To understand this you must know that whenever a given pagestyle
% (say `xxx') is selected by a \verb+\pagestyle{xxx}+ command the
% macro \verb+\ps@xxx+ is executed.
% Therefore we define a macro \verb+\ps@underline+ which is called
% when you say \verb+\pagestyle{underline}+.
% To provide for a rule with user-defined headings we also define
% the pagestyle `myunderline' , i.e.\ the macro \verb+\ps@myunderline+.
% \StopEventually{}
% As always we begin by identifying the latest version of this file
% on the VDU an in the transcript file.
%    \begin{macrocode}
\typeout{Style-Option: `underline'
   \fileversion \space <\filedate>  (RmS)}
\typeout{Documentation dated
   \@spaces \@spaces \space\space\space <\docdate>  (RmS)}
%    \end{macrocode}
% \begin{macro}{\ps@underline}
%    The first thing the macro \verb+\ps@underline+
%    does is to call
%    \verb+\ps@headings+ to set up everything like the `headings'
%    pagestyle does.
%    Here we do not need to distinguish onesided and twosided
%    printing since this is already done correctly by
%    \verb+\ps@headings+.
%    \begin{macrocode}
\def\ps@underline{\ps@headings
%    \end{macrocode}
%    Then we redefine \verb+\@evenhead+. The first part is a copy of
%    the definition in \verb+\ps@headings+.
%    This has the advantage that this style option works with
%    document styles `article', `report', and `book'.
%    \begin{macrocode}
  \def\@evenhead{\rm \thepage\hfil \sl\leftmark\null
%    \end{macrocode}
%    Additionally we include a \verb+\vadjust+ primitive. The effect of
%    this primitive is to add its argument after the current
%    \verb+\hbox+ to the enclosing vertical list.
%    \begin{macrocode}
    \vadjust{\vskip .3ex\hrule}}%
%    \end{macrocode}
%    The \verb+\@oddhead+ macro is constructed
%    analogously.\footnote{{\tt\bslash null} is defined to be
%                          {\tt\bslash hbox\char`\{\char`\}} in
%                          {\tt lplain.tex}.}
%    \begin{macrocode}
  \def\@oddhead{\null\sl \rightmark \hfil \rm\thepage
    \vadjust{\vskip .3ex\hrule}}}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\ps@myunderline}
%    The macro \verb+\ps@myunderline+ for underlining user defined
%    running heads is constructed analogously.
%    \begin{macrocode}
\def\ps@myunderline{\ps@myheadings
  \def\@oddhead{\null\sl \rightmark \hfil
    \rm\thepage\vadjust{\vskip .3ex\hrule}}%
  \def\@evenhead{\rm\thepage\hfil\sl \leftmark \null
    \vadjust{\vskip .3ex\hrule}}}
%    \end{macrocode}
% \end{macro}
% Remarks, comments, complaints, etc. should be sent to: \\[3mm]
% Rainer Sch\"opf \\
% Institut f\"ur Physik \\
% Universit\"at Mainz \\
% Staudinger Weg 7 \\
% D-6500 Mainz \\
% West Germany \\
% \tt <SCHOEPF@DMZNAT51.BITNET>
% \Finale
\endinput
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