%%
%% This is file `changebar.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% changebar.dtx  (with options: `package')
%% 
%% 
%% This is a generated file.
%% 
%% Copyright 1994-1996 Johannes Braams.  All rights reserved.
%% 
%% For further copyright information see any other copyright notices in
%% this file.
%% 
%%   This file is distributed in the hope that it will be useful,
%%   but WITHOUT ANY WARRANTY; without even the implied warranty of
%%   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
%% 
%%   For error reports concerning UNCHANGED versions of this file no more
%%   than one year old, send a bug report, using latex-bugs.tex to me at
%%   the address jlbraams@cistron.nl.
%% 
%%   Please do not request updates from me directly.  Primary
%%   distribution is through the CTAN archives.
%% 
%% 
%% IMPORTANT COPYRIGHT NOTICE:
%% 
%% You are NOT ALLOWED to distribute this file alone.
%% 
%% You are allowed to distribute this file under the condition that it is
%% distributed together with all the files listed in manifest.txt.
%% 
%% If you receive only some of these files from someone, complain!
%% 
%% Permission is granted to copy this file to another file with a clearly
%% different name and to customize the declarations in that copy to serve
%% the needs of your installation.
%% 
%% However, NO PERMISSION is granted to generate or to distribute a
%% modified version of this file under its original name.
%% 
%% You are NOT ALLOWED to change this file.
%% 
%% 
%% MODIFICATION ADVICE:
%% 
%% If you want to customize this file, it is best to make a copy of the
%% source file(s) from which it was produced.  Use a different name for
%% your copy(ies) and modify the copy(ies); this will ensure that your
%% modifications do not get overwritten when you install a new release of
%% the standard system.  You should also ensure that your modified source
%% file does not generate any modified file with the same name as a
%% standard file.  You can then easily distribute your modifications by
%% distributing the modified and renamed copy of the source file; this
%% will ensure that other users can safely use your modifications.
%% 
%% You will also need to produce your own, suitably named, .ins file to
%% control the generation of files from your source file; this file
%% should contain your own preambles for the files it generates, not
%% those in the standard .ins file.
%% 
%% The names of the source files used are shown above.
%% 
%% 
%% 
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{changebar}
           [1996/03/26 v3.2c Indicate changes with marginal bars]
\def\cb@maxpoint{80}
\def\cb@minpoint{1}
\def\cb@nil{0}
\newcount\cb@nextpoint
\cb@nextpoint=\cb@minpoint
\newcount\cb@currentpoint
\newcount\cb@page
\newcount\cb@pagecount
\cb@pagecount=0
\newif\ifouterbars
\newif\if@cb@trace
\newdimen\cb@odd
\newdimen\cb@even
\def\cb@positions{%
  \global\cb@odd =\hoffset
  \global\advance\cb@odd by \oddsidemargin
  \ifouterbars
    \global\advance\cb@odd by \textwidth
    \global\advance\cb@odd by \changebarsep
    \global\advance\cb@odd by 0.5\changebarwidth
  \else
    \global\advance\cb@odd by -\changebarsep
    \global\advance\cb@odd by -0.5\changebarwidth
  \fi
  \global\cb@even =\hoffset
  \global\advance\cb@even by \evensidemargin
  \if@twoside
    \ifouterbars
      \global\advance\cb@even by -\changebarsep
      \global\advance\cb@even by -0.5\changebarwidth
    \else
      \global\advance\cb@even by \textwidth
      \global\advance\cb@even by \changebarsep
      \global\advance\cb@even by 0.5\changebarwidth
    \fi
  \else
    \ifouterbars
      \global\advance\cb@even by \textwidth
      \global\advance\cb@even by \changebarsep
      \global\advance\cb@even by 0.5\changebarwidth
    \else
      \global\advance\cb@even by -\changebarsep
      \global\advance\cb@even by -0.5\changebarwidth
    \fi
  \fi}
{\catcode`\p=12\catcode`\t=12 \gdef\cb@removedim#1pt{#1}}
\DeclareOption{DVItoLN03}{\global\chardef\cb@driver@setup=0\relax}
\DeclareOption{dvitoln03}{\global\chardef\cb@driver@setup=0\relax}
\DeclareOption{DVItoPS}{\global\chardef\cb@driver@setup=1\relax}
\DeclareOption{dvitops}{\global\chardef\cb@driver@setup=1\relax}
\DeclareOption{DVIps}{\global\chardef\cb@driver@setup=2\relax}
\DeclareOption{dvips}{\global\chardef\cb@driver@setup=2\relax}
\DeclareOption{emTeX}{\global\chardef\cb@driver@setup=3\relax}
\DeclareOption{emtex}{\global\chardef\cb@driver@setup=3\relax}
\DeclareOption{outerbars}{\outerbarstrue}
\DeclareOption{innerbars}{\outerbarsfalse}
\DeclareOption{leftbars}{%
  \def\cb@positions{%
    \global\cb@odd\hoffset
    \global\advance\cb@odd by \oddsidemargin
    \global\advance\cb@odd by -\changebarsep
    \global\advance\cb@odd by -0.5\changebarwidth
    \global\cb@even\hoffset
    \global\advance\cb@even by \evensidemargin
    \global\advance\cb@even by -\changebarsep
    \global\advance\cb@even by -0.5\changebarwidth
    }}
\DeclareOption{rightbars}{%
  \def\cb@positions{%
    \global\cb@odd =\hoffset
    \global\advance\cb@odd by \oddsidemargin
    \global\advance\cb@odd by \textwidth
    \global\advance\cb@odd by \changebarsep
    \global\advance\cb@odd by 0.5\changebarwidth
    \global\cb@even\hoffset
    \global\advance\cb@even by \evensidemargin
    \global\advance\cb@even by \textwidth
    \global\advance\cb@even by \changebarsep
    \global\advance\cb@even by 0.5\changebarwidth
    }}
\DeclareOption{traceon}{\@cb@tracetrue}
\DeclareOption{traceoff}{\@cb@tracefalse}
\DeclareOption*{\OptionNotUsed\PackageError
      {Unrecognised option `\CurrentOption'}%
      {known options are dvitoln03, dvitops, dvips
        and emtex,\MessageBreak
        outerbars, innerbars, leftbars and rightbars.}}
\ExecuteOptions{innerbars,traceoff,dvips}
\ProcessOptions\relax
\if@compatibility
  \def\driver#1{%
    \bgroup\edef\next{\def\noexpand\tempa{#1}}%
      \uppercase\expandafter{\next}%
      \def\LN{DVITOLN03}%
      \def\DVItoPS{DVITOPS}%
      \def\DVIPS{DVIPS}%
      \def\emTeX{EMTEX}%
      \global\chardef\cb@driver@setup=0\relax
      \ifx\tempa\LN      \global\chardef\cb@driver@setup=0\fi
      \ifx\tempa\DVItoPS \global\chardef\cb@driver@setup=1\fi
      \ifx\tempa\DVIPS   \global\chardef\cb@driver@setup=2\fi
      \ifx\tempa\emTeX   \global\chardef\cb@driver@setup=3\fi
    \egroup}
  {\def\do{\noexpand\do\noexpand}
    \xdef\@preamblecmds{\@preamblecmds \do\driver}
    }
\fi
\def\cb@trace@defpoint#1#2{%
  \wlog{Changebar trace: defining point \the#1 at position \the#2}
  \wlog{Changebar trace: cb@pagecount: \the\cb@pagecount;
    page \thepage}}
\def\cb@trace@connect#1#2#3{%
  \wlog{Changebar trace: connecting points \the#1 and \the#2;
      barwidth: \the#3}
  \wlog{Changebar trace: cb@pagecount: \the\cb@pagecount;
    page \thepage}}
\def\cb@setup@specials{%
\ifcase\cb@driver@setup
  \def\cb@defpoint##1##2{%
    \special{ln03:defpoint \the##1(\the##2,)}%
    \if@cb@trace\cb@trace@defpoint##1##2\fi}
  \def\cb@connect##1##2##3{%
    \special{ln03:connect \the##1\space\space \the##2\space \the##3}%
    \if@cb@trace\cb@trace@connect##1##2##3\fi}
  \def\cb@resetpoints{%
    \special{ln03:resetpoints \cb@minpoint \space\cb@maxpoint}}
\or
  \def\cb@defpoint##1##2{%
    \special{dvitops: inline
                \expandafter\cb@removedim\the##2\space 6.5536 mul\space
                /CBarX\the##1\space exch def currentpoint exch pop
                /CBarY\the##1\space exch def}%
    \if@cb@trace\cb@trace@defpoint##1##2\fi}
  \def\cb@connect##1##2##3{%
    \special{dvitops: inline
                gsave \thechangebargrey\space 100 div setgray
                \expandafter\cb@removedim\the##3\space 6.5536 mul\space
                CBarX\the##1\space\space CBarY\the##1\space\space moveto
                CBarX\the##2\space\space CBarY\the##2\space\space lineto
                stroke grestore}%
    \if@cb@trace\cb@trace@connect##1##2##3\fi}
  \let\cb@resetpoints\relax
\or
  \def\cb@defpoint##1##2{%
     \special{ps:
                \expandafter\cb@removedim\the##2\space
                Resolution\space mul\space 72.27\space div\space
                /CBarX\the##1\space exch def currentpoint exch pop
                /CBarY\the##1\space exch def}%
    \if@cb@trace\cb@trace@defpoint##1##2\fi}
    \def\cb@connect##1##2##3{%
      \special{ps:
                gsave \thechangebargrey\space 100 div setgray
                \expandafter\cb@removedim\the##3\space
                Resolution\space mul\space 72.27\space div\space
                setlinewidth
                CBarX\the##1\space\space CBarY\the##1\space\space moveto
                CBarX\the##2\space\space CBarY\the##2\space\space lineto
                stroke grestore}%
    \if@cb@trace\cb@trace@connect##1##2##3\fi}
    \let\cb@resetpoints\relax
\or
  \PackageWarning{Changebar}%
    {changebars only supported for v1.5+ of dvidrv}%
  \def\cb@defpoint##1##2{%
    \special{em:point \the##1,\the##2}%
    \if@cb@trace\cb@trace@defpoint##1##2\fi}
  \def\cb@connect##1##2##3{%
    \special{em:line \the##1,\the##2,\the##3}%
    \if@cb@trace\cb@trace@connect##1##2##3\fi}
  \let\cb@resetpoints\relax
\else
  \PackageWarning{Changebar}{changebars not supported in unknown setup}
  \def\cb@defpoint##1##2{%
    \if@cb@trace\cb@trace@defpoint##1##2\fi
    }
  \def\cb@connect##1##2##3{%
    \if@cb@trace\cb@trace@connect##1##2##3\fi
    }
  \let\cb@resetpoints\relax
\fi
\global\let\cb@setup@specials\relax}
\newcommand\cbstart{\@ifnextchar [{\cb@start}%
                                  {\cb@start[\changebarwidth]}}
\newcommand\cbend{\cb@end}
\newcommand\cbdelete{\@ifnextchar [{\cb@delete}
                                   {\cb@delete[\deletebarwidth]}}
\def\cb@delete[#1]{\vbox to \z@{\vss\cb@start[#1]\vskip #1\cb@end}}
\newenvironment{changebar}%
               {\@ifnextchar [{\cb@start}%
                              {\cb@start[\changebarwidth]}}%
               {\cb@end}
\newcommand\nochangebars{%
  \def\cb@start[##1]{}%
  \def\cb@delete[##1]{}%
  \let\cb@end\relax}
\newlength{\changebarwidth}
\setlength{\changebarwidth}{2pt}
\newlength{\deletebarwidth}
\setlength{\deletebarwidth}{4pt}
\newlength{\changebarsep}
\setlength{\changebarsep}{30pt}
\newcounter{changebargrey}
\setcounter{changebargrey}{65}
\def\cb@start[#1]{%
  \cb@currentpoint=\cb@nextpoint
  \@tempdima#1\relax
  \cb@push\cb@currentlist
  \ifvmode
    \cb@setBeginPoint\cb@currentpoint
  \else
   \vbox to \z@{%
     \vskip -\ht\strutbox
     \cb@setBeginPoint\cb@currentpoint
     \vskip \ht\strutbox}\fi
  \cb@writeAux\cb@advancePoint}
\def\cb@advancePoint{%
  \global\advance\cb@nextpoint by 2\relax
  \ifnum\cb@nextpoint>\cb@maxpoint
    \global\cb@nextpoint=\cb@minpoint\relax
  \fi}
\def\cb@end{%
  \cb@pop\cb@currentlist
  \ifnum\cb@currentpoint=\cb@nil
    \PackageWarning{Changebar}%
      {Badly nested changebars; Expect erroneous results}%
  \else
    \cb@setEndPoint\cb@currentpoint
    \global\advance\cb@currentpoint by1\cb@writeAux
  \fi}
\def\cb@setBeginPoint#1{%
  \ifodd\cb@pagecount
    \cb@defpoint{#1}{\cb@even}%
  \else
    \cb@defpoint{#1}{\cb@odd}%
  \fi}
\def\cb@setEndPoint#1{%
  \@tempcnta=#1\advance\@tempcnta by1\relax
  \ifodd\cb@pagecount
    \cb@defpoint{\@tempcnta}{\cb@even}%
  \else
    \cb@defpoint{\@tempcnta}{\cb@odd}%
  \fi
  \cb@connect{#1}{\@tempcnta}{\@tempdima}}%
\def\cb@writeAux{%
  \if@filesw
    \begingroup
      \edef\point{\the\cb@currentpoint}%
      \edef\level{\the\@tempdima}%
      \let\the=0%
      \edef\cb@temp{\write\@auxout
        {\string\cb@barpoint{\point}{\the\cb@pagecount}{\level}}}%
      \cb@temp
    \endgroup
  \fi}
\let\cb@makecol\@makecol
\def\@makecol{%
  \setbox\@cclv \vbox{%
    \cb@resetpoints
    \cb@beginSaves
    \unvbox\@cclv
    \boxmaxdepth\maxdepth}%
  \gdef\cb@beginSaves{}
  \global\advance\cb@pagecount by 1\relax
  \cb@buildActive\cb@processActive
  \cb@makecol}
\let\cb@vtryfc\@vtryfc
\def\@vtryfc{%
  \setbox\@outputbox \vbox{%
    \cb@resetpoints
    \cb@beginSaves
    \unvbox\@cclv
    \boxmaxdepth\maxdepth}%
  \gdef\cb@beginSaves{}
  \global\advance\cb@pagecount by 1\relax
  \cb@buildActive\cb@processActive
  \cb@vtryfc}
\def\cb@processActive{%
  \cb@pop\cb@spanlist
  \ifnum\cb@currentpoint=\cb@nil
  \else
    \setbox\@cclv\vbox{%
      \unvbox\@cclv
      \boxmaxdepth\maxdepth
      \advance\cb@pagecount by -1\relax
      \cb@setEndPoint\cb@currentpoint}%
    \cb@saveBeginPoint\cb@currentpoint
    \cb@push\cb@history
    \cb@processActive
  \fi}
\def\cb@saveBeginPoint#1{%
  \ifodd\cb@pagecount
    \xdef\cb@beginSaves{\cb@defpoint{#1}{\cb@even}\cb@beginSaves}%
  \else
    \xdef\cb@beginSaves{\cb@defpoint{#1}{\cb@odd}\cb@beginSaves}%
  \fi}
\def\cb@beginSaves{}                % initially empty
\def\cb@buildActive{\cb@initlist\cb@spanlist\cb@pushNextActive}
\def\cb@pushNextActive{%
  \cb@pop\cb@history
  \ifnum\cb@currentpoint=\cb@nil
  \else
    \ifnum\cb@page>\cb@pagecount
      \cb@push\cb@history
    \else
      \ifodd\cb@currentpoint
        \cb@push\cb@spanlist
      \else
        \cb@pop\cb@spanlist
      \fi
      \cb@pushNextActive
    \fi
  \fi}
\def\cb@initlist#1{\xdef#1{}}
\cb@initlist\cb@history
\newwrite\cb@write
\newread\cb@read
\immediate\openout\cb@write=\jobname.cb\relax
\cb@initlist\cb@spanlist
\cb@initlist\cb@currentlist
\def\cb@pop#1{%
  \ifx #1\cb@history
    \ifeof\cb@read
    \else
      {\endlinechar=-1\read\cb@read to\@temp
       \xdef\cb@history{\cb@history\@temp}%
      }%
    \fi
  \fi
  \ifx#1\@empty
    \cb@currentpoint=\cb@nil\cb@page=0\relax
  \else
    \expandafter\cb@carcdr#1e#1%
  \fi}
\def\cb@carcdr#1n#2p#3l#4e#5{%
  \cb@currentpoint=#1\cb@page=#2\relax\@tempdima=#3\xdef#5{#4}}
\def\cb@push#1{%
  \xdef#1{\the\cb@currentpoint n\the\cb@page p\the\@tempdima l#1}}
\def\cb@barpoint#1#2#3{\immediate\write\cb@write{#1n#2p#3l}}
\AtBeginDocument{%
  \cb@setup@specials
  \cb@positions
  \immediate\closeout\cb@write
  \immediate\openin\cb@read=\jobname.cb}
\AtEndDocument{%
  \clearpage
  \cb@initlist\cb@history
  \immediate\closein\cb@read
  \immediate\openin\cb@read=\jobname.cb%
  \let\cb@barpoint=\cb@checkHistory}
\def\cb@checkHistory#1#2#3{%
  \cb@pop\cb@history
  \ifnum #1=\cb@currentpoint\relax
    \ifnum #2=\cb@page\relax
    \else
      \cb@error
    \fi
  \else
    \cb@error
  \fi}
\def\cb@error{%
  \PackageWarning{Changebar}%
    {Changebar info has changed.\MessageBreak
     Rerun to get the bars right}
  \gdef\cb@checkHistory##1##2##3{}%
  \let\cb@barpoint=\cb@checkHistory}
\let\cb@endfloat=\end@float
\def\end@float{%
  \cb@pop\cb@currentlist
  \ifnum\cb@currentpoint=\cb@nil
  \else
    \cb@push\cb@currentlist
    \global\@tempdima=\@tempdima
    \egroup
    \global\setbox\@currbox=%
        \vbox\bgroup\cb@start[\@tempdima]\unvbox\@currbox\cb@end
  \fi
  \cb@endfloat}
\let\cb@footnote=\@footnotetext
\long\def\@footnotetext#1{%
  \cb@pop\cb@currentlist
  \ifnum\cb@currentpoint=\cb@nil
    \cb@footnote{#1}%
  \else
    \cb@push\cb@currentlist
    \edef\cb@temp{\the\@tempdima}%
    \cb@footnote{\cb@start[\cb@temp]#1\cb@end}%
  \fi}
\let\cb@mpfootnote=\@mpfootnotetext
\long\def\@mpfootnotetext#1{%
  \cb@pop\cb@currentlist
  \ifnum\cb@currentpoint=\cb@nil
    \cb@mpfootnote{#1}%
  \else
    \cb@push\cb@currentlist
    \edef\cb@temp{\the\@tempdima}%
    \cb@mpfootnote{\cb@start[\cb@temp]#1\cb@end}%
  \fi}
\endinput
%%
%% End of file `changebar.sty'.