--- /dev/null
+%%
+%% This is file `bytefield.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% bytefield.dtx (with options: `package')
+%%
+%% This is a generated file.
+%%
+%% Copyright (C) 2005 by Scott Pakin <scott+bf@pakin.org>
+%%
+%% This file may be distributed and/or modified under the conditions of
+%% the LaTeX Project Public License, either version 1.3a of this license
+%% or (at your option) any later version. The latest version of this
+%% license is in:
+%%
+%% http://www.latex-project.org/lppl.txt
+%%
+%% and version 1.3a or later is part of all distributions of LaTeX version
+%% 2004/10/11 or later.
+%%
+\NeedsTeXFormat{LaTeX2e}[1999/12/01]
+\ProvidesPackage{bytefield}
+ [2005/07/31 v1.2a Network protocol diagrams]
+\RequirePackage{calc}[1998/07/07]
+\def\bf@newdimen#1{\advance\count11 by 1
+ \ch@ck1\insc@unt\dimen% Check room
+ \allocationnumber=\count11
+ \dimendef#1=\allocationnumber
+ \wlog{\string#1=\string\dimen\the\allocationnumber\space (locally)}}
+\newlength{\bytefield@height}
+\newif\ifcounting@words
+\newlength{\bytefield@height@increment}
+\DeclareRobustCommand{\inc@bytefield@height}[1]{%
+ \setlength{\bytefield@height@increment}{#1}%
+ \global\advance\bytefield@height by \bytefield@height@increment}
+\newcounter{bits@wide}
+\newsavebox{\entire@bytefield@picture}
+\newenvironment{bytefield}[1]{%
+ \setcounter{bits@wide}{#1}%
+ \let\old@nl=\\%
+ \let\amp=&%
+ \catcode`\&=10
+ \openup -1pt
+ \setlength{\bytefield@height}{0pt}%
+ \setlength{\unitlength}{1pt}%
+ \counting@wordstrue
+ \begin{lrbox}{\entire@bytefield@picture}%
+ \renewcommand{\\}{%
+ \amp\show@wordlabelr\cr%
+ \ignorespaces\counting@wordstrue\make@lspace\amp}%
+ \vbox\bgroup\ialign\bgroup##\amp##\amp##\cr\amp%
+}{%
+ \amp\show@wordlabelr\cr\egroup\egroup%
+ \end{lrbox}%
+ \usebox{\entire@bytefield@picture}}
+\newlength{\bitwidth}
+\AtBeginDocument{\settowidth{\bitwidth}{\tiny 99i}}
+\newlength{\byteheight}
+\AtBeginDocument{\setlength{\byteheight}{4ex}}
+\newlength{\units@wide}
+\newlength{\units@tall}
+\DeclareRobustCommand{\bitbox}[3][lrtb]{%
+ \setlength{\units@wide}{\bitwidth * #2}%
+ \parse@bitbox@arg{#1}%
+ \draw@bit@picture{\strip@pt\units@wide}{\strip@pt\byteheight}{#3}}
+\DeclareRobustCommand{\wordbox}[3][lrtb]{%
+ \setlength{\units@wide}{\bitwidth * \value{bits@wide}}%
+ \setlength{\units@tall}{\byteheight * #2}%
+ \parse@bitbox@arg{#1}%
+ \draw@bit@picture{\strip@pt\units@wide}{\strip@pt\units@tall}{#3}}
+\DeclareRobustCommand{\draw@bit@picture}[3]{%
+ \begin{picture}(#1,#2)%
+ \put(0,0){\makebox(#1,#2){\parbox[c]{#1\unitlength}{%
+ \bf@newdimen\height
+ \bf@newdimen\depth
+ \bf@newdimen\totalheight
+ \bf@newdimen\width
+ \height=#2\unitlength
+ \depth=0pt%
+ \totalheight=#2\unitlength
+ \width=#1\unitlength
+ \def\widthunits{#1}%
+ \def\heightunits{#2}%
+ \centering #3}}}%
+ \ifbitbox@top
+ \put(0,#2){\line(1,0){#1}}
+ \fi
+ \ifbitbox@bottom
+ \put(0,0){\line(1,0){#1}}
+ \fi
+ \ifbitbox@left
+ \put(0,0){\line(0,1){#2}}
+ \fi
+ \ifbitbox@right
+ \put(#1,0){\line(0,1){#2}}
+ \fi
+ \end{picture}%
+ \ifcounting@words
+ \inc@bytefield@height{\unitlength * \real{#2}}%
+ \counting@wordsfalse
+ \fi
+ \ignorespaces}
+\newif\ifbitbox@top
+\newif\ifbitbox@bottom
+\newif\ifbitbox@left
+\newif\ifbitbox@right
+\def\parse@bitbox@arg#1{%
+ \bitbox@topfalse
+ \bitbox@bottomfalse
+ \bitbox@leftfalse
+ \bitbox@rightfalse
+ \parse@bitbox@sides#1X}
+\def\parse@bitbox@sides#1{%
+ \ifx#1X%
+ \else
+ \ifx#1t%
+ \bitbox@toptrue
+ \else
+ \ifx#1b%
+ \bitbox@bottomtrue
+ \else
+ \ifx#1l%
+ \bitbox@lefttrue
+ \else
+ \ifx#1r%
+ \bitbox@righttrue
+ \fi
+ \fi
+ \fi
+ \fi
+ \expandafter\parse@bitbox@sides
+ \fi}
+\newlength{\units@high}
+\DeclareRobustCommand{\skippedwords}[1][2ex]{%
+ \setlength{\units@wide}{\bitwidth * \value{bits@wide}}%
+ \setlength{\units@high}{1pt * \ratio{\units@wide}{6.0pt}}%
+ \setlength{\units@tall}{#1 + \units@high}%
+ \edef\num@wide{\strip@pt\units@wide}%
+ \edef\num@tall{\strip@pt\units@tall}%
+ \edef\num@high{\strip@pt\units@high}%
+ \begin{picture}(\num@wide,\num@tall)
+ \put(0,\num@tall){\line(6,-1){\num@wide}}
+ \put(\num@wide,0){\line(-6,1){\num@wide}}
+ \put(0,0){\line(0,1){\num@high}}
+ \put(\num@wide,\num@tall){\line(0,-1){\num@high}}
+ \end{picture}%
+ \ifcounting@words
+ \inc@bytefield@height{\unitlength * \real{\num@tall}}%
+ \counting@wordsfalse
+ \fi}
+\DeclareRobustCommand{\bitheader}[2][l]{%
+ \parse@bitbox@arg{lrtb}%
+ \setlength{\units@wide}{\bitwidth * \value{bits@wide}}%
+ \setlength{\units@tall}{\heightof{\tiny 9}}%
+ \setlength{\units@high}{\units@tall * -1}%
+ \def\bit@endianness{#1}%
+ \begin{picture}(\strip@pt\units@wide,\strip@pt\units@tall)%
+ (0,\strip@pt\units@high)
+ \parse@range@list#2,X,
+ \end{picture}%
+ \ifcounting@words
+ \inc@bytefield@height{\unitlength * \real{\strip@pt\units@tall}}%
+ \counting@wordsfalse
+ \fi
+ \ignorespaces}
+\def\parse@range@list#1,{%
+ \ifx X#1
+ \else
+ \parse@range#1-#1-#1\relax
+ \expandafter\parse@range@list
+ \fi}
+\newlength{\header@xpos}
+\newcounter{header@val}
+\newcounter{max@header@val}
+\def\parse@range#1-#2-#3\relax{%
+ \setcounter{header@val}{#1}
+ \setcounter{max@header@val}{#2 + 1}
+ \loop
+ \ifnum\value{header@val}<\value{max@header@val}%
+ \if\bit@endianness b%
+ \setlength{\header@xpos}{%
+ \bitwidth * (\value{bits@wide}-\value{header@val}-1)}
+ \else
+ \setlength{\header@xpos}{\bitwidth * \value{header@val}}
+ \fi
+ \put(\strip@pt\header@xpos,0){%
+ \makebox(\strip@pt\bitwidth,\strip@pt\units@tall){%
+ \tiny \theheader@val}}
+ \addtocounter{header@val}{1}
+ \repeat}
+\newlength{\curlyshrinkage}
+\setlength{\curlyshrinkage}{5pt}
+\newlength{\curlyspace}
+\AtBeginDocument{\setlength{\curlyspace}{1ex}}
+\newlength{\labelspace}
+\AtBeginDocument{\setlength{\labelspace}{0.5ex}}
+\newbox{\curly@box}
+\def\store@rcurly#1#2{%
+ \begingroup
+ \bf@newdimen\curly@height%
+ \setlength{\curly@height}{#2 - \curlyshrinkage}%
+ \bf@newdimen\half@curly@height%
+ \setlength{\half@curly@height}{0.5\curly@height}%
+ \bf@newdimen\curly@shift%
+ \setlength{\curly@shift}{\half@curly@height + 0.5\curlyshrinkage}%
+ \global\sbox{#1}{\raisebox{\curly@shift}{%
+ $\xdef\old@axis{\the\fontdimen22\textfont2}$%
+ $\fontdimen22\textfont2=0pt%
+ \left.\vrule height\half@curly@height
+ width 0pt
+ depth\half@curly@height\right\}$%
+ $\fontdimen22\textfont2=\old@axis$}}%
+ \endgroup
+}
+\def\store@lcurly#1#2{%
+ \begingroup
+ \bf@newdimen\curly@height%
+ \setlength{\curly@height}{#2 - \curlyshrinkage}%
+ \bf@newdimen\half@curly@height%
+ \setlength{\half@curly@height}{0.5\curly@height}%
+ \bf@newdimen\curly@shift%
+ \setlength{\curly@shift}{\half@curly@height + 0.5\curlyshrinkage}%
+ \global\sbox{#1}{\raisebox{\curly@shift}{%
+ $\xdef\old@axis{\the\fontdimen22\textfont2}$%
+ $\fontdimen22\textfont2=0pt%
+ \left\{\vrule height\half@curly@height
+ width 0pt
+ depth\half@curly@height\right.$%
+ $\fontdimen22\textfont2=\old@axis$}}%
+ \endgroup
+}
+\def\show@wordlabelr{}
+\newlength{\wordlabelr@start}
+\newlength{\wordlabelr@end}
+\newenvironment{wordgroupr}[1]{%
+ \global\wordlabelr@start=\bytefield@height
+ \gdef\wordlabelr@text{#1}%
+ \ignorespaces%
+}{%
+ \global\wordlabelr@end=\bytefield@height
+ \gdef\show@wordlabelr{%
+ \sbox{\word@label@box}{%
+ \begin{tabular}[b]{@{}l@{}}\wordlabelr@text\end{tabular}}%
+ \settowidth{\label@box@width}{\usebox{\word@label@box}}%
+ \setlength{\label@box@height}{\wordlabelr@end-\wordlabelr@start}%
+ \store@rcurly{\curly@box}{\label@box@height}%
+ \bf@newdimen\total@box@width%
+ \setlength{\total@box@width}{%
+ \curlyspace +
+ \widthof{\usebox{\curly@box}} +
+ \labelspace +
+ \label@box@width}%
+ \begin{picture}(\strip@pt\total@box@width,0)
+ \put(0,0){%
+ \hspace*{\curlyspace}%
+ \usebox{\curly@box}%
+ \hspace*{\labelspace}%
+ \makebox(\strip@pt\label@box@width,\strip@pt\label@box@height){%
+ \usebox{\word@label@box}}}
+ \end{picture}%
+ \gdef\show@wordlabelr{}}%
+ \ignorespaces}
+\newlength{\wordlabell@start}
+\newlength{\wordlabell@end}
+\newlength{\total@lbox@width}
+\gdef\make@lspace{}
+\newenvironment{wordgroupl}[1]{%
+ \global\wordlabell@start=\bytefield@height
+ \gdef\wordlabell@text{#1}%
+ \sbox{\word@label@box}{%
+ \begin{tabular}[b]{@{}l@{}}\wordlabell@text\end{tabular}}%
+ \settowidth{\label@box@width}{\usebox{\word@label@box}}%
+ \store@lcurly{\curly@box}{5cm}%
+ \setlength{\total@lbox@width}{%
+ \curlyspace +
+ \widthof{\usebox{\curly@box}} +
+ \labelspace +
+ \label@box@width}%
+ \global\total@lbox@width=\total@lbox@width
+ \gdef\make@lspace{%
+ \hspace*{\total@lbox@width}%
+ \gdef\make@lspace{}}%
+ \ignorespaces%
+}{%
+ \global\wordlabell@end=\bytefield@height
+ \bf@newdimen\starting@point
+ \setlength{\starting@point}{%
+ -\total@lbox@width - \bitwidth*\value{bits@wide}}%
+ \sbox{\word@label@box}{%
+ \begin{tabular}[b]{@{}l@{}}\wordlabell@text\end{tabular}}%
+ \settowidth{\label@box@width}{\usebox{\word@label@box}}%
+ \setlength{\label@box@height}{\wordlabell@end-\wordlabell@start}%
+ \store@lcurly{\curly@box}{\label@box@height}%
+ \begin{picture}(0,0)
+ \put(\strip@pt\starting@point,0){%
+ \makebox(\strip@pt\label@box@width,\strip@pt\label@box@height){%
+ \usebox{\word@label@box}}%
+ \hspace*{\labelspace}%
+ \usebox{\curly@box}%
+ \hspace*{\curlyspace}}
+ \end{picture}%
+ \ignorespaces}
+\newlength{\label@box@width}
+\newlength{\label@box@height}
+\newsavebox{\word@label@box}
+\endinput
+%%
+%% End of file `bytefield.sty'.
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