% headerfooter.sty 13 Apr 89

% Use with LaTeX version 2.09:
% \documentstyle[headerfooter]{article}

% Copyright (c) 1987 by Stephen Gildea
% Permission to copy all or part of this work is granted, provided
% that the copies are not made or distributed for resale, and that
% the copyright notice and this notice are retained.
% 
% THIS WORK IS PROVIDED ON AN "AS IS" BASIS.  THE AUTHOR PROVIDES NO
% WARRANTY WHATSOEVER, EITHER EXPRESS OR IMPLIED, REGARDING THE WORK,
% INCLUDING WARRANTIES WITH RESPECT TO ITS MERCHANTABILITY OR FITNESS
% FOR ANY PARTICULAR PURPOSE.

% If you make any improvements, I'd like to hear about them.

% Stephen Gildea
% MIT Earth Resources Lab
% Cambridge, Mass. 02139
% mit-erl!gildea
% gildea@erl.mit.edu

% \pageheader{LEFT}{CENTER}{RIGHT}
% \pagefooter{LEFT}{CENTER}{RIGHT}

% There is no reason why these commands should not be available
% to the user.  Of course, I did fancy up the interface a bit.
% By mit-erl!gildea 11 October 1986
% minor changes 14 Oct 87 gildea
% added \pageheaderlinetrue feature 9 Dec 88 gildea
% added \pagefooterlinetrue feature 13 Apr 89 gildea

% All of these commands take three arguments, which are printed at
% the left, center, and right of each page.  All three args must be
% provided even if some of them are empty.  The odd and even
% variations are only useful if you are using the twoside option.

% Example: \pagefooter{}{\thepage}{}

% Say \pageheaderlinetrue if you want the header underlined.
% Say \pagefooterlinetrue if you want a rule above the footer.

\newif\ifpageheaderline	\pageheaderlinefalse
\newif\ifpagefooterline	\pagefooterlinefalse

\newdimen\pageheaderlineskip  \pageheaderlineskip=1.5pt

\newdimen\pagefooterlineskip  \pagefooterlineskip=\pageheaderlineskip

\def\@headerline#1#2#3{%
	\ifpageheaderline
          \vbox{\hbox to \textwidth{\rlap{#1}\hss{#2}\hss\llap{#3}}%
                \vskip\pageheaderlineskip \hrule}%
        \else{\rlap{#1}\hss{#2}\hss\llap{#3}}\fi}

\def\@footerline#1#2#3{%
	\ifpagefooterline
          \vbox{\hrule \vskip\pagefooterlineskip
                \hbox to \textwidth{\rlap{#1}\hss{#2}\hss\llap{#3}}}%
        \else{\rlap{#1}\hss{#2}\hss\llap{#3}}\fi}

\newcommand\oddpageheader[3]{\def\@oddhead{\@headerline{#1}{#2}{#3}}}

\newcommand\evenpageheader[3]{\def\@evenhead{\@headerline{#1}{#2}{#3}}}

\newcommand\oddpagefooter[3]{\def\@oddfoot{\@footerline{#1}{#2}{#3}}}

\newcommand\evenpagefooter[3]{\def\@evenfoot{\@footerline{#1}{#2}{#3}}}

\newcommand\pageheader[3]{%
	\oddpageheader{#1}{#2}{#3}\evenpageheader{#1}{#2}{#3}}

\newcommand\pagefooter[3]{%
	\oddpagefooter{#1}{#2}{#3}\evenpagefooter{#1}{#2}{#3}}