Typographical enhancements. Now, the documentation is typeset using a modified

book style.

Please look at this version and tell me your opinion. Especially I don't feel
happy about the spacing and (not) indenting of paragraphs.

Also, I've removed things like "fax" and "letter" from the LaTeX mapping file.

5 files changed, 449 insertions, 361 deletions

diff --git a/doc/sbase/dist/birddoc/latex2e/mapping b/doc/sbase/dist/birddoc/latex2e/mapping
index 2875c6dd..1b3a4412 100644
--- a/doc/sbase/dist/birddoc/latex2e/mapping
+++ b/doc/sbase/dist/birddoc/latex2e/mapping
@@ -1,81 +1,18 @@
 
-% linuxdoc to latex replacement file
+% birddoc to LaTeX replacement file
 
-<qwertz>	+     
-</qwertz>	+
-
-<article>	+ "\\documentclass\[a4paper\]{article}\n"
-			"\\usepackage{linuxdoc-sgml}\n"
+<book>		+ "\\documentclass\[a4paper,10pt,openany\]{book}\n"
+			"\\usepackage{birddoc}\n"
 			"\\usepackage{qwertz}\n"
 			"\\usepackage{url}\n"
 			"\\usepackage\[latin1\]{inputenc}\n"
 			"\\usepackage{t1enc}\n"
-			"\\usepackage{babel}\n"
 			"\\usepackage{epsfig}\n"
 			"\\usepackage{[OPTS]}\n"
-			"\\def\\addbibtoc{\n"
-			"\\addcontentsline{toc}{section}{\\numberline{\\mbox{}}\\relax\\bibname}\n"
-			"}%end-preamble\n"	+
-
-</article>	+	"\\end{document}"	+
-
-<report>	+ "\\documentclass\[a4paper\]{report}\n"
-			"\\usepackage{linuxdoc-sgml}\n"
-			"\\usepackage{qwertz}\n"
-			"\\usepackage{url}\n"
-			"\\usepackage\[latin1\]{inputenc}\n"
-			"\\usepackage{t1enc}\n"
-			"\\usepackage{babel}\n"
-			"\\usepackage{epsfig}\n"
-			"\\usepackage{[OPTS]}\n"
-			"\\def\\addbibtoc{\n"
-			"\\addcontentsline{toc}{chapter}{\\numberline{\\mbox{}}\\relax\\bibname}\n"
-			"}\n"
-			"\\pagestyle{headings}%end-preamble\n"	+
-
-</report>	+	"\\end{document}"	+
-
-<book>	+ 	"\\documentclass\[a4paper\]{book}\n"
-			"\\usepackage{linuxdoc-sgml}\n"
-			"\\usepackage{qwertz}\n"
-			"\\usepackage{url}\n"
-			"\\usepackage\[latin1\]{inputenc}\n"
-			"\\usepackage{t1enc}\n"
-			"\\usepackage{babel}\n"
-			"\\usepackage{epsfig}\n"
-			"\\usepackage{[OPTS]}\n"
-			"\\def\\addbibtoc{\n"
-			"\\addcontentsline{toc}{chapter}{\\numberline{\\mbox{}}\\relax\\bibname}\n"
-			"}\n"
 			"\\pagestyle{headings}%end-preamble\n" 	+
 
 </book>		+	"\\end{document}"	+
 
-
-<notes> +	"\\documentclass\[a4paper\]{article}\n"
-			"\\usepackage{linuxdoc-sgml}\n"
-			"\\usepackage{qwertz}\n"
-			"\\usepackage{url}\n"
-			"\\usepackage\[latin1\]{inputenc}\n"
-			"\\usepackage{t1enc}\n"
-			"\\usepackage{babel}\n"
-			"\\usepackage{epsfig}\n"
-			"\\usepackage{[OPTS]}\n"
-			"\\def\\title#1{\n"
-			"\\begin{center}\n"	
- 			"\\bf\n"			
-			"#1\n"
-			"\\end{center}\n"
-			"\\bigskip\n"		
-			"}\n"
-			"\\begin{document}%end-preamble\n"	
-
-</notes>	+	"\\end{document}"	+
-
-
-<dina4> 	+	""
-</dina4>
-
 % Manual Pages are expected to be formatted using nroff (or groff), unless
 % they are included  as sections of other qwertz documents.  
 
@@ -188,10 +125,10 @@
 </item>
 
 <tag>		+	"\\item\[{\\ttfamily "
-</tag>			"}\] \\mbox{}\n\n"
+</tag>			"}\] \\hfil\\break\n"	+
 
 <tagp>		+	"\\item\[ "
-</tagp>			"\] \\mbox{}\n\n"
+</tagp>			"\] \\hfil\\break\n"	+
 
 <cite>			"\\cite{[ID]"
 </cite>			"}"
@@ -263,7 +200,7 @@
 </struct>		"}"
 
 <param>			"{\\it "
-</param>		"}"
+</param>		"\\/}"
 
 <type>			"{\\rm "
 </type>			"}"
@@ -313,14 +250,19 @@
 % <main>		+	"\\macro{qwmain}{\\qwmain}"
 % </main>
 
+%<code>		+	"\\par\n"
+%			"\\medbreak\\hrule\\nopagebreak\n"
+%			"\\begin{verbatim}"	+
+%
+%</code>		+	"\\end{verbatim}\n"
+%			"\\nopagebreak\\hrule\\medbreak\n" +
+
 <code>		+	"\\par\n"
-			"\\addvspace{\\medskipamount}\n"
-			"\\nopagebreak\\hrule\n"
+			"\\goodbreak{\\birdnarrow\n"
 			"\\begin{verbatim}"	+
 
-</code>		+	"\\end{verbatim} \n"
-			"\\nopagebreak\\hrule \n"
-			"\\addvspace{\\medskipamount}"	+
+</code>		+	"\\end{verbatim}\n"
+			"}\\smallbreak\n" +
 
 <verb>		+	"\\begin{verbatim}"	+
 </verb>		+	"\\end{verbatim}"	+
@@ -473,291 +415,4 @@
 <hline>		+	"\\hline"	+
 </hline>
 
-% slides
-
-<slides>    + "\\documentclass\[qwertz,dina4,xlatin1,[OPTS]\]{article}\n"
-			"\\input{epsf.tex}\n"	
-			"\\def\\title#1{\n"
-			"\\begin{center}\n"	
- 			"\\bf\\LARGE\n"			
-			"#1\n"
-			"\\end{center}\n"
-			"\\bigskip\n"		
-			"}\n"
-			"\\begin{document}"		+
-</slides>	+ 	"\\end{document}"		+
-
-<slide>	
-</slide>	+	"\\newpage"		+
-
-% letters
-
-
-<letter> +  "\\documentstyle\[qwertz,dina4,xlatin1,[OPTS]\]{letter}\n"
-			"\\input{epsf.tex} \n"
-			"\\newfont{\\gmd}{gmdlogo} \n"
-			"\\font\\agb=pagk at 13truept\n"
-			"\\font\\helv=phvr at 7.4truept\n"
-			"\\parindent 0pt \n"
-			"\\parskip 5pt plus 1pt minus 2pt \n"
-			"\\addtolength{\\oddsidemargin}{-4.0mm} \n"
-			"\\addtolength{\\evensidemargin}{-4.0mm} \n"
-			"\\setlength{\\unitlength}{ 1.0mm } \n"
-
-			% initial values for optional elements in the 
-			% letter head
-
-			"\\def\\semail{} \n"
-			"\\def\\remail{} \n"
-			"\\def\\sphone{} \n"
-			"\\def\\rphone{} \n"	
-			"\\def\\sref{} \n"
-			"\\def\\rref{} \n"
-			"\\def\\rdate{} \n"
-			"\\def\\subj{} \n"
-
-			% switch for distinguishing between context of
-			% sender and receiver's address
-
-			"\\newif\\ifsender \n"
-			"\\newif\\ifsubj \n"
-			"\\subjfalse \n"  	% assume no subject
-
-			"\\newif\\ifcc \n"	% for cc field
-			"\\ccfalse \n"
-
-			"\\newif\\ifsaddress\n"
-			"\\saddressfalse\n"
-			"\\newif\\ifraddress\n"
-			"\\raddressfalse\n"
-
-			"\\newif\\iffax\n"
-			"\\faxfalse\n"
-			
-"\\def\\letterhead{\n"
-"\\begin{picture}(178,54) \n"
-"\\put(0,50){\\agb GESELLSCHAFT F\\\"{U}R MATHEMATIK UND \n"
-"DATENVERARBEITUNG MBH } \n"
-
-"\\put(147,50){\\gmd g} \n "
-
-"\\put(0,40){\\helv GMD, Postfach 1316, Schlo{\\ss} Birlinghoven,  \n "
-"D-53757 Sankt Augustin 1} \n "
-
-"\\put(97,40){\\parbox\[b\]{10cm} \n"
-"{\\helv\\raggedright \n"
-"\\baselineskip=9pt plus 2pt \n"
-"Telefon (0 22 41) 14-0 \\\\ \n"
-"Telefax (0 22 41) 14 26 18, -28 89}}\n"
-
-"\\put(0,210){\\makebox(0,0)\[bl\]{\\today}} \n "
-
-% letter specific information
-
-% from
-
-% name and e-mail
-
-"\\put(0,44){\\sname\\ \\semail} \n"
-
-% phone
-
-"\\put(128,44){-\\sphone} \n"
-
-% To, name and address
-
-"\\put(0,30){\\parbox\[t\]{9.5cm} \n"
-"{\\rname \\\\\n"
-"\\ifraddress\\raddress\\fi}}\n"
-
-% subject
-
-"\\ifsubj{\\put(0,0){\\subj}}\\fi\n"
-
-% sref
-
-% "\\put(70,15){\\sref} \n"
-
-% rref
-
-% "\\put(0,15){\\rref} \n"
-
-% rdate
-
-% "\\put(32,15){\\rdate} \n"
-
-"\\end{picture} \n"
-"}\n"	% end of letterhead definition
-
-</letter>	+	"\\end{document}"	+
-
-<telefax> +	"\\documentstyle\[[OPTS],qwertz,dina4,xlatin1\]{article}\n"
-			"\\def\\faxlength{[LENGTH]}\n"
-
-			% initial values for optional elements in the 
-			% letter head
-
-			"\\def\\semail{} \n"
-			"\\def\\remail{} \n"
-			"\\def\\sphone{} \n"
-			"\\def\\rphone{} \n"
-			"\\def\\rfax{} \n"
-			"\\def\\sfax{} \n"
-			"\\def\\subj{} \n"
-
-			% switch for distinguishing between context of
-			% sender and receiver's address
-
-			"\\newif\\ifsender \n"
-			"\\newif\\ifsubj \n"
-			"\\subjfalse \n"  	% assume no subject
-
-			"\\newif\\ifcc \n"	% for cc field
-			"\\ccfalse \n"
-
-			"\\newif\\ifsaddress\n"
-			"\\saddressfalse\n"
-			"\\newif\\ifraddress\n"
-			"\\raddressfalse\n"
-
-			"\\newif\\iffax\n"
-			"\\faxtrue\n"
-			
-"\\def\\letterhead{\n"
-"\\newfont{\\gmd}{gmdlogo}\n"
-"\\setlength{\\parindent}{0pt}\n"
-
-"\\parbox\[b\]{\\textwidth}{Gesellschaft f\\\"{u}r\n"
-"Mathematik und Datenverarbeitung mbH \\\\\n"
-"Schlo{\\ss} Birlinghoven \\\\\n"
-"D-53757 St.~Augustin \\\\\n"
-"Telefax: +49--2241--142618, "
-"+49--2241--142889}\\makebox\[0pt\]\[r\]{\\gmd e}\n"
-
-"\\begin{center}\n"
-"~ \\\\\n"
-"\\LARGE TELEFAX\n"
-"\\\\ ~\n"
-"\\end{center}\n"
-
-"\\framebox\[\\textwidth\]{\\parbox{0.9\\textwidth}\%\n"
-"{\n"
-"Von/From: \\sname\n"
-"\\\\\n"
-"Datum/Date: \\today\n"
-"}}\n"
-
-"\\framebox\[\\textwidth\]{\\parbox{0.9\\textwidth}\%\n"
-"{\n"
-"An/To: \\rname\n"
-"\\\\\n"
-"Telefax: \\rfax\n"
-"\\\\\n"
-"Firma/Company: \\raddress\n"
-"}}\n"
-
-"\\framebox\[\\textwidth\]{\\parbox{0.9\\textwidth}\%\n"
-"{\n"
-"Anzahl der gesendeten Seiten (inkl. dieses Deckblatts)/ \\\\\n"
-"Number of pages (including this cover sheet): \\faxlength\n"
-"}}\n"
-
-"\\framebox\[\\textwidth\]{\\parbox{0.9\\textwidth}\%\n"
-"{\\setlength{\\parskip}{0.5\\baselineskip}\n"
-"Bemerkungen/Comments: \\\\\n"
-"\\subj\n"
-"\\vspace{60pt}}}\n"
-"}\n"		% end of letterhead definition for fax messages
-
-</telefax>	+	"\\end{document}"	+
-
-<opening>	+  	"\\begin{document}\n"
-			"\\pagestyle{empty}\n"
-			"\\letterhead\n"
-
-"\\iffax\\newpage\n"
-"\\else{\\ifsubj\\vspace{0.5cm}\\fi}\n"
-"\\fi\n\\par" 	+
-
-</opening>	+ 	"\n\n\\vspace{0.6cm}\n\\par"	+
-
-
-<from>		+	"\\sendertrue\n"
-			"\\def\\sname{"
-</from>			"}"	+
-
-
-<to>		+	"\\senderfalse\n"
-			"\\def\\rname{"
-</to>			"}"	+
-
-% first end definition of name
-
-<address>		"\\def\\address{"
-</address>		"}\n"
-			"\\ifsender{\\global\\saddresstrue\n"
-			"\\global\\def\\saddress{\\address}}\n"
-			"\\else{\\global\\raddresstrue\n"
-			"\\global\\def\\raddress{\\address}}\n"
-			"\\fi"	+
-
-<email>		+	"\\def\\email{"
-</email>		"}\n"
-			"\\ifsender\\edef\\semail{(\\email)} \n"
-			"	\\else\\edef\\remail{\\email} \n"
-			"\\fi"	+
-
-<phone>		+	"\\def\\phone{"
-</phone>		"}\n"
-			"\\ifsender\\edef\\sphone{\\phone} \n"
-			"	\\else\\edef\\rphone{\\phone} \n"
-			"\\fi"	+
-
-
-<fax>		+	"\\def\\fax{"
-</fax>			"}\n"
-			"\\ifsender\\edef\\sfax{\\fax} \n"
-			"\\else{\\global\\edef\\rfax{\\fax}\n"
-			"\\newwrite\\faxnum\n"
-			"\\immediate\\openout\\faxnum=.fax=num\n"
-			"\\immediate\\write\\faxnum{\\rfax}\n"
-			"\\immediate\\closeout\\faxnum}\n"
-			"\\fi"	 +
-
-<subject>	+	"\\subjtrue\n"
-			"\\def\\subj{"
-</subject>		"}"	+
-
-
-<sref>		+	"\\newcommand{\\sref}{"
-</sref>			"}"	+
-
-<rref>		+	"\\newcommand{\\rref}{"
-</rref>			"}"	+
-
-<rdate>		+	"\\def\\rdate}{"
-</rdate>		"}"	+
-
-<closing>	+	"\\vspace{1cm} \n\\par\n"
-			"\\parbox\[t\]{\\textwidth} "
-			"{"
-</closing>	+	"}\\vspace{2cm}\n\\par\n"
-			"\\sname \n"		
-			"\\ifcc{\\vspace{0.5cm}\n\\par\n" 
-			"cc:\\ \\ \\parbox\[t\]{14cm}{\n"
-			"\\cc}\\fi\n" +
-			
-<cc>		+	"\\cctrue\n"
-			"\\def\\cc{"
-</cc>			"}"	+
-
-<encl>		+	"\\vspace{0.5cm}\n\\par\n" 
-			"encl:\\ \\ \\parbox\[t\]{14cm}{"
-</encl>			"}\n\n"	+
-
-<ps>		+	"\\vspace{0.5cm}\n\\par"	+	
-</ps>
-
-
 % end of latex replacement file
-
diff --git a/doc/tex/birddoc.sty b/doc/tex/birddoc.sty
new file mode 100644
index 00000000..3cb74035
--- /dev/null
+++ b/doc/tex/birddoc.sty
@@ -0,0 +1,113 @@
+%% This is a LaTeX style file for typesetting BIRD documentation.
+%% Hacked up by Martin Mares <mj@ucw.cz>
+%%
+%% This is a modified version of linuxdoc-qwertz.sty, for use with SGML-generated LaTeX
+%% by Matt Welsh (mdw@sunsite.unc.edu)
+%%
+%% Based on linuxdoc.sty by Michael K. Johnson, and latex.tex by 
+%% Leslie Lamport. 
+
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesClass{birddoc}
+
+%%% GLOBAL LAYOUT THINGS
+
+\marginparwidth 0.0 in
+\parindent 0 in
+\topmargin -0.5 in
+\setlength{\textheight}{\paperheight}
+\addtolength{\textheight}{-2 in}
+\advance\headsep 2 ex
+\advance\textheight -2 ex
+\renewcommand{\baselinestretch}{1.14}
+\addtolength{\parskip}{0.5 ex}
+\setcounter{tocdepth}{1}
+
+\oddsidemargin 0.0 in
+\evensidemargin 0 in
+\textwidth 7 in
+\def\ps@headings{\let\@mkboth\markboth
+ \def\@oddfoot{}\def\@evenfoot{}%       No feet.
+ \def\@evenhead{\protect\rule[-4pt]{\textwidth}{.5pt}\kern-\textwidth
+                \rm \thepage\hfil \bf \leftmark}     % Left heading.
+ \def\@oddhead{\protect\rule[-4pt]{\textwidth}{.5pt}\kern-\textwidth
+               {\bf \rightmark}\hfil \rm\thepage}    % Right heading.
+ \def\chaptermark##1{\markboth {{\ifnum \c@secnumdepth >\m@ne
+     \@chapapp\ \thechapter. \ \fi ##1}}{}}%
+ \def\sectionmark##1{\markright {{\ifnum \c@secnumdepth >\z@
+  \thesection. \ \fi ##1}}}}
+
+\def\@makechapterhead#1{%
+  {\parindent \z@ \raggedright \normalfont
+    \huge \bfseries \@chapapp\space\thechapter: #1\par\nobreak
+    \vskip 20\p@
+  }}
+\def\@makeschapterhead#1{%
+  {\parindent \z@ \raggedright \normalfont
+    \huge \bfseries #1\par\nobreak
+    \vskip 20\p@
+  }}
+
+%% Titlepage stuff
+
+\gdef\@title{}
+\gdef\title#1{\gdef\@title{#1}}
+\gdef\@date{}
+\gdef\date#1{\gdef\@date{#1}}
+\gdef\@author{}
+\gdef\author#1{\gdef\@author{#1}}
+\gdef\@abstract{}
+\gdef\abstract#1{\gdef\@abstract{#1}}
+
+\def\maketitle{\thispagestyle{empty}\let\footnotesize\small%
+\let\footnoterule\relax
+%\setcounter{page}{0}%
+%\null
+%\vskip 3 in
+\noindent
+{\huge\sf \@title}\\
+\rule{\textwidth}{1mm}\\
+\mbox{}\@author\ \hfill \@date\ \\
+\vskip 1 ex
+\noindent{\sf \@abstract}
+\setcounter{footnote}{0}%
+\gdef\@author{}\gdef\@title{}\gdef\@years{}\gdef\@abstract{}
+\let\maketitle\relax}
+
+\def\birdnarrow{\advance\@totalleftmargin by 0.5in}
+
+%% Needs to be here for the previous ps@headings defs to work.
+\pagestyle{headings}
+
+%%% USEFUL MACROS
+
+\newcommand{\linux}{Linux}              % Always use this when
+				        % refering to the \linux\
+				        % operating system, like that.
+\newcommand{\key}[1]{{\fbox{\small\tt #1}}}   % Use this to mark keys, like
+				              % \key{del} for the delete key.
+\newcommand{\ret}{\fbox{\sf return}}    % Special case for the return key.
+\newcommand{\st}{\small\tt}             % Small typewriter -- comes in handy.
+%\newcommand{\lb}{{\tt\char '173}}       % Left Brace '{'
+%\newcommand{\rb}{{\tt\char '175}}       % Right Brace '}'
+\newcommand{\lbr}{$\langle$}		% Left Bracket '<'
+\newcommand{\rbr}{$\rangle$}		% Right Bracket '>'
+\newcommand{\bs}{{\tt\char '134}}       % BackSlash '\'
+\newcommand{\tm}{${}^{\mbox{\tiny\sf TM}}$}
+\newcommand{\TM}{\tm}                   % TM trademark symbol in
+				        % either case
+\newcommand{\cparam}[1]{{\rm \lbr{\sl #1}\rbr}}
+					% Metavariables.
+
+%% Define NAMEURL macro to handle the optional name argument
+%% This calls on the \url macro from the url.sty package so the 
+%% URL will be hyphenated correctly.
+\def\nameurl#1#2{{\em #2} {\tt <\url{#1}>}}
+\def\onlynameurl#1{{\em #1}}
+
+%% the tscreen environment automatically goes into typewriter type,
+%%  but is otherwise like the screen environment
+
+\newenvironment{tscreen}%
+ {\begin{quote}\bgroup\small\tt}%
+ {\egroup\end{quote}}
diff --git a/doc/tex/null.sty b/doc/tex/null.sty
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/doc/tex/null.sty
diff --git a/doc/tex/qwertz.sty b/doc/tex/qwertz.sty
new file mode 100644
index 00000000..aeade62b
--- /dev/null
+++ b/doc/tex/qwertz.sty
@@ -0,0 +1,19 @@
+		
+% qwertz TeX macros
+
+\catcode`\"=12 
+\sloppy 
+\newtheorem{definition}{Definition} 
+\newtheorem{proposition}{Proposition} 
+\newtheorem{lemma}{Lemma} 
+\newtheorem{corollary}{Corollary} 
+\newtheorem{theorem}{Theorem} 
+\newcommand{\mch}[1]{{\ifmmode#1 \else\(#1\)\fi}} 
+\newcommand{\lt}{{\ifmmode{<}\else{\verb+<+}\fi}} 
+\newcommand{\gt}{{\ifmmode{>}\else{\verb+>+}\fi}} 
+\newcommand{\verbar}{{\ifmmode{|}\else{\tt|}\fi}} 
+\newcommand{\idx}[1]{#1\index{#1}}
+\newcommand{\cdx}[1]{#1\index{#1@{\tt #1}}}  
+\newcommand{\nidx}[1]{\index{#1}}
+\newcommand{\ncdx}[1]{\index{#1@{\tt #1}}}
+
diff --git a/doc/tex/url.sty b/doc/tex/url.sty
new file mode 100644
index 00000000..59f10afb
--- /dev/null
+++ b/doc/tex/url.sty
@@ -0,0 +1,301 @@
+% url.sty  ver 1.2    19-Oct-1996   Donald Arseneau   asnd@triumf.ca
+%
+% A form of \verb that allows linebreaks at certain characters or 
+% combinations of characters, accepts reconfiguration, and can usually
+% be used in the argument to another command.  It is intended for email
+% addresses, hypertext links, directories/paths, etc., which normally 
+% have no spaces.  The font may be selected using the \urlstyle command, 
+% and new url-like commands can be defined using \urldef.
+%
+% Usage:    Conditions:
+% \url{ }   If the argument contains any "%", "#", or "^^", or ends with
+%           "\", it can't be used in the argument to another command.  
+%           The argument must not contain unbalanced braces.
+% \url|  |  ...where "|" is any character not used in the argument and not 
+%           "{".  The same restrictions as above except that the argument
+%           may contain unbalanced braces.
+% \xyz      for "\xyz" a defined-url;  this can be used anywhere, no matter
+%           what characters it contains.
+% 
+% See further instructions after "\endinput"
+%
+\def\Url@ttdo{% style assignments for tt fonts or T1 encoding
+\def\UrlBreaks{\do\.\do\@\do\\\do\/\do\!\do\_\do\|\do\%\do\;\do\>\do\]%
+ \do\)\do\,\do\?\do\'\do\+\do\=}%
+\def\UrlBigBreaks{\do\:\do@url@hyp}%
+\def\UrlNoBreaks{\do\(\do\[\do\{\do\<}% (unnecessary)
+\def\UrlSpecials{\do\ {\ }}%
+\def\UrlOrds{\do\*\do\-\do\~}% any ordinary characters that aren't usually
+}
+\def\Url@do{% style assignments for OT1 fonts except tt
+\def\UrlBreaks{\do\.\do\@\do\/\do\!\do\%\do\;\do\]\do\)\do\,\do\?\do\+\do\=}%
+\def\UrlBigBreaks{\do\:\do@url@hyp}%
+\def\UrlNoBreaks{\do\(\do\[\do\{}% prevents breaks after *next* character
+\def\UrlSpecials{\do\<{\langle}\do\>{\mathbin{\rangle}}\do\_{\_%
+ \penalty\@m}\do\|{\mid}\do\{{\lbrace}\do\}{\mathbin{\rbrace}}\do
+ \\{\mathbin{\backslash}}\do\~{\mathord{{}^{\textstyle\sim}}}\do\ {\ }}%
+\def\UrlOrds{\do\'\do\"\do\-}%
+}
+\def\url@ttstyle{%
+\@ifundefined{selectfont}{\def\UrlFont{\tt}}{\def\UrlFont{\ttfamily}}\Url@ttdo
+}
+\def\url@rmstyle{%
+\@ifundefined{selectfont}{\def\UrlFont{\rm}}{\def\UrlFont{\rmfamily}}\Url@do
+}
+\def\url@sfstyle{%
+\@ifundefined{selectfont}{\def\UrlFont{\sf}}{\def\UrlFont{\sffamily}}\Url@do
+}
+\def\url@samestyle{\ifdim\fontdimen\thr@@\font=\z@ \url@ttstyle \else
+  \url@rmstyle \fi \def\UrlFont{}}
+
+\@ifundefined{strip@prefix}{\def\strip@prefix#1>{}}{}
+\@ifundefined{verbatim@nolig@list}{\def\verbatim@nolig@list{\do\`}}{}
+
+\def\Url{\relax\ifmmode\@nomatherr$\fi 
+ \UrlFont $\fam\z@ \textfont\z@\font 
+ \let\do\@makeother \dospecials % verbatim catcodes
+ \catcode`{\@ne \catcode`}\tw@ % except braces 
+ \medmuskip0mu \thickmuskip\medmuskip \thinmuskip\medmuskip
+ \@tempcnta\fam\multiply\@tempcnta\@cclvi 
+ \let\do\set@mathcode \UrlOrds % ordinary characters that were special
+ \advance\@tempcnta 8192 \UrlBreaks % bin
+ \advance\@tempcnta 4096 \UrlBigBreaks % rel
+ \advance\@tempcnta 4096 \UrlNoBreaks % open
+ \let\do\set@mathact \UrlSpecials % active
+ \let\do\set@mathnolig \verbatim@nolig@list % prevent ligatures 
+ \@ifnextchar\bgroup\Url@z\Url@y}
+
+\def\Url@y#1{\catcode`{11 \catcode`}11
+  \def\@tempa##1#1{\Url@z{##1}}\@tempa}
+\def\Url@z#1{\def\@tempa{#1}\expandafter\expandafter\expandafter\Url@Hook
+  \expandafter\strip@prefix\meaning\@tempa\UrlRight\m@th$\endgroup}
+\def\Url@Hook{\UrlLeft}
+\let\UrlRight\@empty
+\let\UrlLeft\@empty
+
+\def\set@mathcode#1{\count@`#1\advance\count@\@tempcnta\mathcode`#1\count@}
+\def\set@mathact#1#2{\mathcode`#132768 \lccode`\~`#1\lowercase{\def~{#2}}}
+\def\set@mathnolig#1{\ifnum\mathcode`#1<32768
+   \lccode`\~`#1\lowercase{\edef~{\mathchar\number\mathcode`#1_{\/}}}%
+   \mathcode`#132768 \fi}
+
+\def\urldef#1#2{\begingroup \setbox\z@\hbox\bgroup
+  \def\Url@z{\Url@def{#1}{#2}}#2}
+\expandafter\ifx\csname DeclareRobustCommand\endcsname\relax
+  \def\Url@def#1#2#3{\m@th$\endgroup\egroup\endgroup
+    \def#1{#2{#3}}}
+\else
+  \def\Url@def#1#2#3{\m@th$\endgroup\egroup\endgroup
+    \DeclareRobustCommand{#1}{#2{#3}}}
+\fi
+
+\def\urlstyle#1{\csname url@#1style\endcsname}
+
+% Sample (and default) configuration:
+%
+\newcommand\url{\begingroup \Url}
+%
+\newcommand\path{\begingroup \urlstyle{tt}\Url}
+%
+% too many styles define \email like \address, so I will not define it.
+% \newcommand\email{\begingroup \urlstyle{rm}\Url}
+
+% Process LaTeX \package options
+%
+\urlstyle{tt}
+\let\Url@sppen\@M
+\def\do@url@hyp{}% by default, no breaks after hyphens
+
+\@ifundefined{ProvidesPackage}{}{
+  \ProvidesPackage{url}[1996/10/19 \space ver 1.2 \space 
+       Verb mode for urls, email addresses, and file names]
+  \DeclareOption{hyphens}{\def\do@url@hyp{\do\-}}% allow breaks after hyphens
+  \DeclareOption{obeyspaces}{\let\Url@Hook\relax}% a flag for later
+  \DeclareOption{spaces}{\let\Url@sppen\relpenalty}
+  \DeclareOption{T1}{\let\Url@do\Url@ttdo}
+  \ProcessOptions
+\ifx\Url@Hook\relax % [obeyspaces] was declared
+  \def\Url@Hook#1\UrlRight\m@th{\edef\@tempa{\noexpand\UrlLeft
+    \Url@retain#1\Url@nosp\, }\@tempa\UrlRight\m@th}
+  \def\Url@retain#1 {#1\penalty\Url@sppen\ \Url@retain}
+  \def\Url@nosp\,#1\Url@retain{}
+\fi
+}
+
+\endinput
+%
+% url.sty  ver 1.2    19-Oct-1996   Donald Arseneau   asnd@reg.triumf.ca
+%
+% This package defines "\url", a form of "\verb" that allows linebreaks,
+% and can often be used in the argument to another command.  It can be
+% configured to print in different formats, and is particularly useful for 
+% hypertext links, email addresses, directories/paths, etc.  The font may 
+% be selected using the "\urlstyle" command and pre-defined text can be 
+% stored with the "\urldef" command. New url-like commands can be defined, 
+% and a "\path" command is provided this way. 
+%
+% Usage:    Conditions:
+% \url{ }   If the argument contains any "%", "#", or "^^", or ends with 
+%           "\", it can't be used in the argument to another command.  
+%           The argument must not contain unbalanced braces.
+% \url|  |  ...where "|" is any character not used in the argument and not 
+%           "{".  The same restrictions as above except that the argument
+%           may contain unbalanced braces.
+% \xyz      for "\xyz" a defined-url;  this can be used anywhere, no matter
+%           what characters it contains.
+% 
+% The "\url" command is fragile, and its argument is likely to be very
+% fragile, but a defined-url is robust.
+%
+% Package Option:  obeyspaces
+% Ordinarily, all spaces are ignored in the url-text.  The "[obeyspaces]" 
+% option allows spaces, but may introduce spurious spaces when a url
+% containing "\" characters is given in the argument to another command.  
+% So if you need to obey spaces you can say "\usepackage[obeyspaces]{url}",
+% and if you need both spaces and backslashes, use a `defined-url' for 
+% anything with "\".
+%
+% Package Option:  hyphens
+% Ordinarily, breaks are not allowed after "-" characters because this 
+% leads to confusion. (Is the "-" part of the address or just a hyphen?)  
+% The package option "[hyphens]" allows breaks after explicit hyphen 
+% characters.  The "\url" command will *never ever* hyphenate words.
+%
+% Package Option:  spaces
+% Likewise, breaks are not usually allowed after spaces under the 
+% "[obeyspaces]" option, but giving the options "[obeyspaces,spaces]"
+% will allow breaks at those spaces.
+%
+% Package Option:  T1
+% This signifies that you will be using T1-encoded fonts which contain
+% some characters missing from most older (OT1) encoded TeX fonts.  This
+% changes the default definition for "\urlstyle{rm}".
+% 
+% Defining a defined-url:
+% Take for example the email address "myself%node@gateway.net" which could
+% not be given (using "\url" or "\verb") in a caption or parbox due to the
+% percent sign.  This address can be predefined with 
+%    \urldef{\myself}\url{myself%node@gateway.net}   or
+%    \urldef{\myself}\url|myself%node@gateway.net|
+% and then you may use "\myself" instead of "\url{myself%node@gateway.net}"
+% in an argument, and even in a moving argument like a caption because a
+% defined-url is robust.
+%
+% Style: 
+% You can switch the style of printing using "\urlstyle{tt}", where "tt"
+% can be any defined style.  The pre-defined styles are "tt", "rm", "sf", 
+% and "same" which all allow the same linebreaks but different fonts -- 
+% the first three select a specific font and the "same" style uses the
+% current text font.  You can define your own styles with different fonts 
+% and/or line-breaking by following the explanations below.  The "\url" 
+% command follows whatever the currently-set style dictates.
+%
+% Alternate commands:
+% It may be desireable to have different things treated differently, each
+% in a predefined style; e.g., if you want directory paths to always be 
+% in tt and email addresses to be rm, then you would define new url-like
+% commands as follows:
+%
+%    \newcommand\email{\begingroup \urlstyle{rm}\Url}
+%    \newcommand\directory{\begingroup \urlstyle{tt}\Url}
+%
+% You must follow this format closely, and NOTE that the final command is 
+% "\Url", not "\url".  In fact, the "\directory" example is exactly the 
+% "\path" definition which is pre-defined in the package.  If you look 
+% above, you will see that "\url" is defined with
+%    \newcommand\url{\begingroup \Url}
+% I.e., using whatever url-style has been selected.
+%
+% You can make a defined-url for these other styles, using the usual 
+% "\urldef" command as in this example:
+%
+%    \urldef{\myself}{\email}{myself%node.domain@gateway.net}
+%
+% which makes "\myself" act like "\email{myself%node.domain@gateway.net}",
+% if the "\email" command is defined as above.  The "\myself" command 
+% would then be robust.
+%
+% Defining styles:
+% Before describing how to customize the printing style, it is best to 
+% mention something about the unusual implementation of "\url".  Although
+% the material is textual in nature, and the font specification required
+% is a text-font command, the text is actually typeset in *math* mode.
+% This allows the context-sensitive linebreaking, but also accounts for
+% the default behavior of ignoring spaces.  Now on to defining styles.
+%
+% To change the font or the list of characters that allow linebreaks, you
+% could redefine the commands "\UrlFont", "\UrlBreaks", "\UrlSpecials" etc.
+% directly in the document, but it is better to define a new `url-style' 
+% (following the example of "\url@ttstyle" and "\url@rmstyle") which defines 
+% all of "\UrlBigbreaks", "\UrlNoBreaks", "\UrlBreaks", "\UrlSpecials", and 
+% "\UrlFont".
+%
+% Changing font:
+% The "\UrlFont" command selects the font.  The definition of "\UrlFont"
+% done by the pre-defined styles varies to cope with a variety of LaTeX
+% font selection schemes, but it could be as simple as "\def\UrlFont{\tt}".
+% Depending on the font selected, some characters may need to be defined 
+% in the "\UrlSpecials" list because many fonts don't contain all the 
+% standard input characters.  
+%
+% Changing linebreaks:
+% The list of characters that allow line-breaks is given by "\UrlBreaks" 
+% and "\UrlBigBreaks", which have the format "\do\c" for character "c". 
+% The differences are that `BigBreaks' have a lower penalty and have 
+% different breakpoints when in sequence (as in "http://"): `BigBreaks' 
+% are treated as mathrels while `Breaks' are mathbins (see The TeXbook, 
+% p.170). In particular, a series of `BigBreak' characters will break at 
+% the end and only at the end; a series of `Break' characters will break 
+% after the first and after every following *pair*; there will be no 
+% break after a `Break' character if a `BigBreak' follows.  In the case 
+% of "http://" it doesn't matter whether ":" is a `Break' or `BigBreak' --
+% the breaks are the same in either case; but for DECnet nodes with "::"
+% it is important to prevent breaks *between* the colons, and that is why 
+% colons are `BigBreaks'.
+%
+% It is possible for characters to prevent breaks after the next following 
+% character (I use this for parentheses).  Specify these in "\UrlNoBreaks". 
+%
+% You can do arbitrarily complex things with characters by making them 
+% active in math mode (mathcode hex-8000) and specifying the definition(s)
+% in "\UrlSpecials".  This is used in the rm and sf styles for OT1 font
+% encoding to handle several characters that are not present in those
+% computer-modern style fonts.  See the definition of "\Url@do", which 
+% is used by both "\url@rmstyle" and "\url@sfstyle"; it handles missing 
+% characters via "\UrlSpecials".  The nominal format for setting each 
+% special character "c" is: "\do\c{<definition>}", but you can include 
+% other definitions too.
+%
+%
+% If all this sounds confusing ... well, it is!  But I hope you won't need 
+% to redefine breakpoints -- the default assignments seem to work well for 
+% a wide variety of applications.  If you do need to make changes, you can 
+% test for breakpoints using regular math mode and the characters "+=(a".
+%
+% Yet more flexibility:
+% You can also customize the verbatim text by defining "\UrlRight" and/or 
+% "\UrlLeft", e.g., for ISO formatting of urls surrounded by "<  >", define
+%
+%    \renewcommand\url{\begingroup \def\UrlLeft{<url: }\def\UrlRight{>}%
+%        \urlstyle{tt}\Url}
+%
+% The meanings of "\UrlLeft" and "\UrlRight" are *not* reproduced verbatim.
+% This lets you use formatting commands there, but you must be careful not
+% to use TeX's special characters ("\^_%~#$&{}" etc.) improperly.
+% You can also define "\UrlLeft" to reprocess the verbatim text, but the 
+% format of the definition is special:
+%
+%    \def\UrlLeft#1\UrlRight{ ... do things with #1 ... }
+%
+% Yes, that is "#1" followed by "\UrlRight" then the definition.  For 
+% example, to put a hyperTeX hypertext link in the DVI file:
+%
+%    \def\UrlLeft#1\UrlRight{\special{html:<a href="#1">}#1\special{html:</a>}}
+%
+% Revision History:
+% ver 1.1 6-Feb-1996:  
+% Fix hyphens that wouldn't break and ligatures that weren't suppressed.
+% ver 1.2 19-Oct-1996:
+% Package option for T1 encoding; Hooks: "\UrlLeft" and "\UrlRight".  
+%
+% The End