source: downloads/boost_1_34_1/libs/graph/doc/lgrind.sty @ 30

%%
%% This is file `lgrind.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% lgrind.dtx  (with options: `package')
%% 
%% LGrind is used to format source code of different programming
%% languages for LaTeX.
%% 
%% LGrind is a major adaptation of Jerry Leichter's tgrind for LaTeX,
%% which was a notable improvement upon Van Jacobsen's tgrind for
%% plain TeX, which was adapted from vgrind, a troff prettyprinter.
%% 
%% Author: Michael Piefel, piefel@cs.tu-berlin.de
%% Based on Van Jacobson's ``tgrindmac'', a macro package for TeX.
%% Modified, 1987 by Jerry Leichter. Put '@' in all internal names.
%% Modified, 1991 by George Reilly. Changed name from tgrind to lgrind.
%% Modified, 1995 by Michael Piefel. Made it work with \LaTeXe.
%%          -1999    Hundreds of bells and whistles. No changelog here.
\NeedsTeXFormat{LaTeX2e}[1996/06/01]
\ProvidesPackage{lgrind}
          [1999/05/28 v3.6 LGrind environment and supporting stuff]
%%stopzone   % VIM syncing
\newcount\lc@unt
\newcount\ln@xt
\newcount\LGnuminterval
\LGnuminterval=10
\DeclareOption{nolineno}{\LGnuminterval=50000}
\DeclareOption{lineno5}{\LGnuminterval=5}
\DeclareOption{lineno1}{\LGnuminterval=1}
\newif\ifLGleftnum
\DeclareOption{leftno}{\LGleftnumtrue}
\newskip\LGindent
\LGindent=1.0\parindent
\DeclareOption{noindent}{\LGindent=0pt}
\newif\ifLGnorules
\DeclareOption{norules}{\LGnorulestrue}
\newlength{\LGsloppy}
\setlength{\LGsloppy}{7.2pt}
\DeclareOption{fussy}{\LGsloppy=0pt}
\newcommand{\DefaultProc}{\@gobble}
\newcommand{\DefaultProcCont}{\@gobble}
\DeclareOption{procnames}{
\renewcommand{\DefaultProc}[1]{\renewcommand{\Procname}{#1}%
\global\setbox\procbox=\hbox{\PNsize #1}}
\renewcommand{\DefaultProcCont}[1]{\renewcommand\Procname{#1}
\global\setbox\procbox=\hbox{\PNsize\dots #1}}}
\newbox\procbox
\newcommand{\Procname}{}
\newif\ifLGnoprocindex
\DeclareOption{noprocindex}{\LGnoprocindextrue}
\ProcessOptions
%\def\BGfont{\sffamily}
\def\BGfont{\ttfamily\bfseries}
\def\CMfont{\rmfamily\itshape}
\def\NOfont{\sffamily}
%\def\NOfont{\ttfamily}
%\def\KWfont{\rmfamily\bfseries}
\def\KWfont{\rmfamily\itshape\bfseries}
%\def\KWfont{\ttfamily}
%\def\STfont{\ttfamily}
\def\STfont{\rmfamily\itshape\bfseries}
%\def\TTfont{\ttfamily\upshape}
\def\TTfont{\rmfamily\itshape\bfseries}
%\def\VRfont{\ttfamily}
\def\VRfont{\rmfamily\itshape\bfseries}
\def\PNsize{\BGfont\small}
\def\LGsize{\small}
\def\LGfsize{\footnotesize}
\newif\ifLGinline
\newif\ifLGd@fault
\def\LGbegin{\ifLGinline$\hbox\else$$\vbox\fi\bgroup\LGd@faulttrue}
\def\LGend{\ifLGd@fault\egroup\ifLGinline$\else$$\fi\LGd@faultfalse\fi}
%%stopzone   % VIM syncing
\newif\ifc@mment
\newif\ifstr@ng
\newif\ifright@
\newbox\ls@far
\newbox\tb@x
\newdimen\TBw@d
\newdimen\@ts
{\catcode`\_=\active \gdef\@setunder{\let_=\sp@ce}}
\newcommand{\lgrindhead}{}
\newcommand{\lgrindfilename}{}\newcommand{\lgrindfilesize}{}
\newcommand{\lgrindmodyear}{}\newcommand{\lgrindmodmonth}{}
\newcommand{\lgrindmodday}{}\newcommand{\lgrindmodtime}{}
\newenvironment{lgrind}[1][1]{%
\def\Line##1{\L{\LB{##1}}}%
\newcommand{\Head}[1]{\gdef\lgrindhead{##1}}%
\newcommand{\File}[6]{\gdef\lgrindfilename{##1}\message{(LGround: ##1)}%
    \gdef\lgrindmodyear{##2}\gdef\lgrindmodmonth{##3}%
    \gdef\lgrindmodday{##4}\gdef\lgrindmodtime{##5}%
    \gdef\lgrindfilesize{##6}}%
\let\Proc=\DefaultProc%
\let\ProcCont=\DefaultProcCont%
\ifLGnoprocindex%
  \let\index\@gobble%
\fi%
\hfuzz=\LGsloppy
\def\NewPage{\filbreak\bigskip}%
\ifLGinline
 \def\L##1{\setbox\ls@far\null{\CF\strut##1}\ignorespaces}%
\else
 \let\r@ghtlno\relax\let\l@ftlno\relax
 \ifnum\LGnuminterval>\z@
  \ifLGleftnum
   \def\l@ftlno{\ifnum\lc@unt>\ln@xt
     \global\advance\ln@xt by\LGnuminterval
     \llap{{\normalfont\scriptsize\the\lc@unt\quad}}\fi}
   \def\r@ghtlno{\rlap{\enspace\box\procbox}}%
  \else
   \def\r@ghtlno{\ifnum\lc@unt>\ln@xt
     \global\advance\ln@xt by\LGnuminterval
     \rlap{{\normalfont\scriptsize\enspace\the\lc@unt%
                \enspace\box\procbox}}
     \else\rlap{\enspace\box\procbox}\fi}%
  \fi
 \fi
 \def\L##1{\@@par\setbox\ls@far=\null\strut
  \global\advance\lc@unt by1%
  \hbox to \linewidth{\hskip\LGindent\l@ftlno ##1\egroup%
  \hfil\r@ghtlno}%
  \ignorespaces}%
\fi
\lc@unt=#1\advance\lc@unt by-1%
\ln@xt=\LGnuminterval\advance\ln@xt by-1%
\loop\ifnum\lc@unt>\ln@xt\advance\ln@xt by\LGnuminterval\repeat%
\def\LB{\hbox\bgroup\bgroup\box\ls@far\CF\let\next=}%
\def\Tab##1{\egroup\setbox\tb@x=\lastbox\TBw@d=\wd\tb@x%
 \advance\TBw@d by 1\@ts\ifdim\TBw@d>##1\@ts
  \setbox\ls@far=\hbox{\box\ls@far \box\tb@x \sp@ce}\else
  \setbox\ls@far=\hbox to ##1\@ts{\box\ls@far \box\tb@x \hfil}\fi\LB}%
\ifLGinline\def\sp@ce{{\hskip .3333em}}%
\else \setbox\tb@x=\hbox{\texttt{0}}%
      \@ts=0.8\wd\tb@x \def\sp@ce{{\hskip 1\@ts}}\fi
\catcode`\_=\active \@setunder
\def\CF{\ifc@mment\CMfont\else\ifstr@ng\STfont\fi\fi}
\def\N##1{{\NOfont ##1}\global\futurelet\next\ic@r}%
\def\K##1{{\KWfont ##1}\global\futurelet\next\ic@r}%
\def\V##1{{\VRfont ##1}\global\futurelet\next\ic@r}%
\def\ic@r{\let\@tempa\/\ifx.\next\let\@tempa\relax%
 \else\ifx,\next\let\@tempa\relax\fi\fi\@tempa}%
\def\C{\egroup\bgroup\CMfont \global\c@mmenttrue \global\right@false}%
\def\CE{\egroup\bgroup \global\c@mmentfalse}%
\def\S{\egroup\bgroup\STfont \global\str@ngtrue}%
\def\SE{\egroup\bgroup \global\str@ngfalse}%
\def\,{\relax \ifmmode\mskip\thinmuskip \else\thinspace \fi}%
\def\!{\relax \ifmmode\mskip-\thinmuskip \else\negthinspace \fi}%
%%stopzone   % VIM syncing
\def\CH##1##2##3{\relax\ifmmode ##1\relax
\else\ifstr@ng ##2\relax\else$##3$\fi\fi }%
\def\|{\CH|||}%  not necessary for T1
\def\<{\CH<<<}%  dto.
\def\>{\CH>>>}%  dto.
\def\-{\CH---}%  minus sign nicer than hyphen
\def\_{\ifstr@ng {\char'137}\else
  \leavevmode \kern.06em \vbox{\hrule width.35em}%
  \ifdim\fontdimen\@ne\font=\z@ \kern.06em \fi\fi }%
\def\#{{\STfont\char'043}}%
\def\2{\CH\backslash {\char'134}\backslash }%          % \
\def\3{\ifc@mment\ifright@ ''\global\right@false%
                      \else``\global\right@true \fi
   \else{\texttt{\char'042}}\fi}%                      % "
\def\5{{\texttt{\char'136}}}%                          % ^
\parindent\z@\parskip\z@ plus 1pt%
\bgroup\BGfont
}
{\egroup\@@par}           % end of environment lgrind
\def\lgrinde{\ifLGinline\else\LGsize\fi\begin{lgrind}}
\def\endlgrinde{\end{lgrind}}
\def\lagrind{\@ifstar{\@slagrind}{\@lagrind}}

\def\@lagrind{\@ifnextchar[{\@@lagrind}{\@@lagrind[t]}}
\def\@slagrind{\@ifnextchar[{\@@slagrind}{\@@slagrind[t]}}
\def\@@lagrind[#1]#2#3#4{%
    \begin{figure}[#1]
\ifLGnorules\else\hrule\fi
\vskip .5\baselineskip
\begin{minipage}\columnwidth\LGsize\LGindent\z@
    \begin{lgrind}
\input #2\relax
    \end{lgrind}
\end{minipage}
\vskip .5\baselineskip plus .5\baselineskip
\ifLGnorules\else\hrule\fi\vskip .5\baselineskip
\begingroup
    \setbox\z@=\hbox{#4}%
    \ifdim\wd\z@>\z@
\caption{#3}%
\label{#4}%
    \else
\captcont{#3}%
    \fi
\endgroup
\vskip 2pt
    \end{figure}
}
\def\@@slagrind[#1]#2#3#4{%
    \begin{figure*}[#1]
\ifLGnorules\else\hrule\fi
\vskip .5\baselineskip
\begin{minipage}\linewidth\LGsize\LGindent\z@
    \begin{lgrind}
\input #2\relax
    \end{lgrind}
\end{minipage}
\vskip .5\baselineskip plus .5\baselineskip
\ifLGnorules\else\hrule\fi\vskip .5\baselineskip
\begingroup
    \setbox\z@=\hbox{#4}%
    \ifdim\wd\z@>\z@
\caption{#3}%
\label{#4}%
    \else
\captcont{#3}%
    \fi
\endgroup
\vskip 2pt
    \end{figure*}
}
\def\lgrindfile#1{%
    \par\addvspace{0.1in}
    \ifLGnorules\else\hrule\fi
    \vskip .5\baselineskip
    \begingroup\LGfsize\LGindent\z@
\begin{lgrind}
    \input #1\relax
\end{lgrind}
    \endgroup
    \vskip .5\baselineskip
    \ifLGnorules\else\hrule\fi
    \addvspace{0.1in}
}
\endinput
%%
%% End of file `lgrind.sty'.