%% TeX macros to handle texinfo files

%   Copyright (C) 1985 Richard M. Stallman
%
%This program is distributed in the hope that it will be useful,
%but without any warranty.  No author or distributor
%accepts responsibility to anyone for the consequences of using it
%or for whether it serves any particular purpose or works at all,
%unless he says so in writing.
%
%   Permission is granted to anyone to distribute verbatim copies
%   of this program's source code as received, in any medium, provided that
%   the copyright notice, the nonwarraty notice above
%   and this permission notice are preserved,
%   and that the distributor grants the recipient all rights
%   for further redistribution as permitted by this notice,
%   and informs him of these rights.
%
%   Permission is granted to distribute modified versions of this
%   program's source code, or of portions of it, under the above
%   conditions, plus the conditions that all changed files carry
%   prominent notices stating who last changed them and that the
%   entire derived work, including anything packaged as part of it and
%   conceptually functioning as a modification of it rather than an
%   application of it, is in its entirety subject to a permission
%   notice identical to this one.
%
%   Permission is granted to distribute this program (verbatim or
%   as modified) in compiled or executable form, provided verbatim
%   redistribution is permitted as stated above for source code, and
%    A.  it is accompanied by the corresponding machine-readable
%      source code, under the above conditions, or
%    B.  it is accompanied by a written offer, with no time limit,
%      to distribute the corresponding machine-readable source code,
%      under the above conditions, to any one, in return for reimbursement
%      of the cost of distribution.   Verbatim redistribution of the
%      written offer must be permitted.  Or,
%    C.  it is distributed by someone who received only the
%      compiled or executable form, and is accompanied by a copy of the
%      written offer of source code which he received along with it.
%
%In other words, you are welcome to use, share and improve this program.
%You are forbidden to forbid anyone else to use, share and improve
%what you give them.   Help stamp out software-hoarding!

\def\texinfoversion{1}
\message{Loading texinfo package [Version \texinfoversion]:}
\message{}

\message{Basics,}
\chardef\other=12
\parskip=1.5pt
\advance\topskip by 1.2cm

\hyphenation{ap-pen-dix}
\hyphenation{mini-buf-fer mini-buf-fers}

% Margin to add to right of even pages, to left of odd pages.
\newdimen \bindingoffset  \bindingoffset=0pt
\newdimen \normaloffset   \normaloffset=\hoffset
\newdimen\pagewidth \newdimen\pageheight
\pagewidth=\hsize \pageheight=\vsize

% \onepageout takes a vbox as an argument.  Note that \pagecontents
% does insertions itself, but you have to call it yourself.
\chardef\PAGE=255  \output={\onepageout{\pagecontents\PAGE}}
\def\onepageout#1{\hoffset=\normaloffset
\ifodd\pageno  \advance\hoffset by \bindingoffset
\else \advance\hoffset by -\bindingoffset\fi
\shipout\vbox{{\let\hsize=\pagewidth \makeheadline} \pagebody{#1}%
 {\let\hsize=\pagewidth \makefootline}}
\advancepageno \ifnum\outputpenalty>-20000 \else\dosupereject\fi}
\def\pagebody#1{\vbox to\pageheight{\boxmaxdepth=\maxdepth #1}}
{\catcode`\@ =11
\gdef\pagecontents#1{\ifvoid\topins\else\unvbox\topins\fi
\dimen@=\dp#1 \unvbox#1
\ifvoid\footins\else\vskip\skip\footins\footnoterule \unvbox\footins\fi
\ifr@ggedbottom \kern-\dimen@ \vfil \fi}
}

% Parse an argument, then pass it to #1.
% The argument can be delimited with [...] or with "..." or braces
% or it can be a whole line.
% #1 should be a macro which expects
% an ordinary undelimited TeX argument.

\def\parsearg #1{\let\next=#1\begingroup\obeylines\futurelet\temp\parseargx}

\def\parseargx{%
\ifx \obeyedspace\temp \aftergroup\parseargdiscardspace \else%
\aftergroup \parseargline %
\fi \endgroup}

{\obeyspaces %
\gdef\parseargdiscardspace {\begingroup\obeylines\futurelet\temp\parseargx}}

\gdef\obeyedspace{\ }

\def\parseargline{\begingroup \obeylines \parsearglinex}
{\obeylines %
\gdef\parsearglinex #1^^M{\endgroup \next {#1}}}

\def\flushcr{\ifx\par\lisppar \def\next##1{}\else \let\next=\relax \fi \next}

%% These are used to keep @begin/@end levels from running away
%% Call \inENV within environments (after a \begingroup)
\newif\ifENV \ENVfalse \def\inENV{\ifENV\relax\else\ENVtrue\fi}
\def\ENVcheck{%
\ifENV\errmessage{Still within an environment.  Type Return to continue.}
\endgroup\fi} % This is not perfect, but it should reduce lossage

% @begin foo  is the same as @foo, for now.
\newhelp\EMsimple{Type <Return> to continue}

\outer\def\begin{\parsearg\beginxxx}

\def\beginxxx #1{%
\expandafter\ifx\csname #1\endcsname\relax
{\errhelp=\EMsimple \errmessage{Undefined command @begin #1}}\else
\csname #1\endcsname\fi}

%% @end foo executes the definition of \Efoo.
%% foo can be delimited by doublequotes or brackets.
\let\ptexend = \end

\def\end{\parsearg\endxxx}

\def\endxxx #1{%
\expandafter\ifx\csname E#1\endcsname\relax
\expandafter\ifx\csname #1\endcsname\relax
\errmessage{Undefined command @end #1}\else
\errorE{#1}\fi\fi
\csname E#1\endcsname}
\def\errorE#1{
{\errhelp=\EMsimple \errmessage{@end #1 not within #1 environment}}}

% Simple aliases that make some plain tex constructs available.

\let\ptexnobreak=\nobreak
\def\nobreak{\par\penalty 10000}

% Single-spacing is done by various environments.

\newskip\singlespaceskip \singlespaceskip = \baselineskip
\def\singlespace{%
{\advance \baselineskip by -\singlespaceskip
\kern \baselineskip}%
\baselineskip=\singlespaceskip
}

% @@ prints an @ -- for Scribe compatibility.
% Kludge this until the fonts are right (grr).
\def\@{{\sf @}}

% Define @` and @' to be the same as ` and '
% but suppressing ligatures.
\def\`{{`}}
\def\'{{'}}

% @: is forces normal size whitespace following.
\def\:{\spacefactor=1000 }

% @* forces a line break.
\let\ptexstar=\* \def\*{\hfil\break}

% @. is an end-of-sentence period.
\let\ptexdot=\. \def\.{.\spacefactor=3000 }

% @# leaves space for a special character.
\let\ptexnumsign=\# \def\#{\write19{(@##)}\hbox to 0.7em{\hfil}}

% @w prevents a word break
\def\w #1{\hbox{#1}}

% Save the essence of & for tabular environments as @\ for BoTeX
% Say @settabs 4 @columns, then @<col0@\col1@\col2@\col3@cr
\let\\=& \let\<=\+
% @+ raises its argument, @- lowers.
\let\ptexplus=\+
\def\+ #1{\raise 1ex\hbox{#1}}

\let\ptexminus=\-
\def\- #1{\lower 1ex\hbox{#1}}

% @group ... @end group  forces ... to be all on one page.

\def\group{\begingroup% \inENV ???
\def \Egroup{\egroup\endgroup}
\vbox\bgroup}

% @br   forces paragraph break

\let\br = \par

% @dots{}  output some dots

\def\dots{$\ldots$}

% @page    forces the start of a new page

\def\page{\par\vfill\supereject}

% @exdent text....
% outputs text on separate line in roman font, starting at standard page margin

\def\exdent{\errmessage{@exdent in filled text}}
  % @lisp, etc, define \exdent locally from \internalexdent

{\obeyspaces
\gdef\internalexdent{\parsearg\exdentzzz}}

\def\exdentzzz #1{{\advance \leftskip by -\lispnarrowing
\advance \hsize by -\leftskip
\advance \hsize by -\rightskip
\leftline{{\rm#1}}}}

% @include file    insert text of that file as input.

\def\include{\parsearg\includezzz}
\def\includezzz #1{{\def\thisfile{#1}\input #1
}}

\def\thisfile{}

% @need space-in-mils
% forces a page break if there is not space-in-mils remaining.

\newdimen\mil  \mil=0.001in

\def\need{\parsearg\needx}

\def\needx #1{\par %
\begingroup %
\dimen0=\pagetotal %
\advance \dimen0 by #1\mil %
\ifdim \dimen0>\pagegoal \vfill\eject \fi %
\endgroup}

% @center line   outputs that line, centered

\def\center{\parsearg\centerzzz}
\def\centerzzz #1{{\advance\hsize by -\leftskip
\advance\hsize by -\rightskip
\centerline{#1}}}

% @sp n   outputs n lines of vertical space

\def\sp{\parsearg\spxxx}
\def\spxxx #1{\par \vskip #1\baselineskip}

% @comment ...line which is ignored...
% @c is the same as @comment
% @ignore ... @end ignore  is another way to write a comment

\def\comment{\parsearg \commentxxx}

\def\commentxxx #1{}

\let\c=\comment

\long\def\ignore #1\end ignore{}

% Some texinfo constructs that are trivial in tex

\def\iftex{}
\def\Eiftex{}
\long\def\ifinfo #1\end ifinfo{}
\long\def\menu #1\end menu{}
\def\asis#1{#1}

\def\node{\parsearg\nodezzz}
\def\nodezzz#1{\nodexxx [#1,]}
\def\nodexxx[#1,#2]{\gdef\lastnode{#1}}
\let\lastnode=\relax

\def\donoderef{\ifx\lastnode\relax\else
\expandafter\expandafter\expandafter\setref{\lastnode}\fi
\let\lastnode=\relax}

\let\refill=\relax

\let\setfilename=\comment

\def\inforef #1{\inforefzzz #1,,,,**}
\def\inforefzzz #1,#2,#3,#4**{See Info file \file{\losespace#3{}}, node `\losespace#1{}'}
\def\losespace #1{#1}

\message{fonts,}

% Font-change commands.

%% Try out Computer Modern fonts at a little bigger than \magstephalf
\font\tenrm=amr10 scaled \magstephalf
\font\tentt=amtt10 scaled \magstephalf
\font\tenbf=amb10 scaled \magstephalf
\font\tenit=amti10 scaled \magstephalf
\font\tensl=amsl10 scaled \magstephalf
\font\tensf=amss10 scaled \magstephalf
\def\li{\sf}
\font\tensc=amcsc10 scaled \magstephalf

% Font for title
\font\titlerm = ambx10 scaled \magstep5

% Fonts for indices
\font\indit=amti9 \font\indrm=amr9
\def\indbf{\indrm} \def\indsl{\indit}
\def\indexfonts{\let\it=\indit \let\sl=\indsl \let\bf=\indbf \let\rm=\indrm}

% Fonts for headings
\font\chaprm=ambx10 scaled \magstep3
\font\chapit=amti10 scaled \magstep3
\font\chapsl=amsl10 scaled \magstep3
\let\chapbf=\chaprm

\font\secrm=ambx10 scaled \magstep2
\font\secit=amti10 scaled \magstep2
\font\secsl=amsl10 scaled \magstep2
\let\secbf=\secrm

\font\ssecrm=ambx10 scaled \magstep1
\font\ssecit=amti10 scaled \magstep1
\font\ssecsl=amsl10 scaled \magstep1
\let\ssecbf=\ssecrm

\def\textfonts{\let\rm=\tenrm\let\it=\tenit\let\sl=\tensl\let\bf=\tenbf%
\let\sc=\tensc\let\sf=\tensf}
\def\chapfonts{\let\rm=\chaprm\let\it=\chapit\let\sl=\chapsl\let\bf=\chapbf}
\def\secfonts{\let\rm=\secrm\let\it=\secit\let\sl=\secsl\let\bf=\secbf}
\def\subsecfonts{\let\rm=\ssecrm\let\it=\ssecit\let\sl=\ssecsl\let\bf=\ssecbf}
% Count depth in font-changes, for error checks
\newcount\fontdepth \fontdepth=0

%% Add scribe-like font environments, plus @l for inline lisp (usually sans
%% serif) and @ii for TeX italic
\let\ptexb=\b \let\ptexc=\c \let\ptexi=\i \let\ptext=\t
\let\ptexl=\l \let\ptexL=\L

\def\i#1{{\sl #1}}
\let\var=\i
\let\dfn=\i

\def\b#1{{\bf #1}}

\def\t#1{{\tt \rawbackslash #1}}
\let\ttfont = \t
\let\kbd=\t
\def\samp #1{`{\tt \rawbackslash #1}'}
\def\key #1{{\tt \uppercase{#1}}}
\def\ctrl #1{{\tt \rawbackslash \hat}#1}

\let\file=\samp

\def\l#1{{\li #1}}
\let\code=\l

\def\r#1{{\rm #1}}
\def\s#1{{\sc #1}}
\def\ii#1{{\it #1}}

\def\titlefont#1{{\titlerm #1}}

\def\titlepage{\begingroup \parindent=0pt \hbox{}%
\let\oldpage=\page
\def\page{\oldpage \hbox{}}}

\def\Etitlepage{\endgroup\page\HEADINGSon}

% Used to generate quoted braces.

\def\mylbrace {{\tt \char '173}}
\def\myrbrace {{\tt \char '175}}
\let\{=\mylbrace
\let\}=\myrbrace

\def\tie{\penalty 10000\ }     % Save plain tex definition of ~.

% Make altmode in file print out right

\catcode `\^^[=\active \def^^[{$\diamondsuit$}

\message{page headings,}

%%% Set up page headings and footings.

\let\thispage=\folio

\newtoks \evenheadline    % Token sequence for heading line of even pages
\newtoks \oddheadline     % Token sequence for heading line of odd pages
\newtoks \evenfootline    % Token sequence for footing line of even pages
\newtoks \oddfootline     % Token sequence for footing line of odd pages

% Now make Tex use those variables
\headline={{\textfonts\rm \ifodd\pageno \the\oddheadline \else \the\evenheadline \fi}}
\footline={{\textfonts\rm \ifodd\pageno \the\oddfootline \else \the\evenfootline \fi}}

% Commands to set those variables.
% For example, this is what  @headings on  does
% @evenheading @thistitle|@thispage|@thischapter
% @oddheading @thischapter|@thispage|@thistitle
% @evenfooting @thisfile||
% @oddfooting ||@thisfile

\def\evenheading{\parsearg\evenheadingxxx}
\def\oddheading{\parsearg\oddheadingxxx}
\def\everyheading{\parsearg\everyheadingxxx}

\def\evenfooting{\parsearg\evenfootingxxx}
\def\oddfooting{\parsearg\oddfootingxxx}
\def\everyfooting{\parsearg\everyfootingxxx}

\def\evenheadingxxx #1{\evenheadingyyy #1\|\|\|\|\finish}
\def\evenheadingyyy #1\|#2\|#3\|#4\finish{%
\global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}

\def\oddheadingxxx #1{\oddheadingyyy #1\|\|\|\|\finish}
\def\oddheadingyyy #1\|#2\|#3\|#4\finish{%
\global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}

\def\everyheadingxxx #1{\everyheadingyyy #1\|\|\|\|\finish}
\def\everyheadingyyy #1\|#2\|#3\|#4\finish{%
\global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}
\global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}

\def\evenfootingxxx #1{\evenfootingyyy #1\|\|\|\|\finish}
\def\evenfootingyyy #1\|#2\|#3\|#4\finish{%
\global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}

\def\oddfootingxxx #1{\oddfootingyyy #1\|\|\|\|\finish}
\def\oddfootingyyy #1\|#2\|#3\|#4\finish{%
\global\oddfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}

\def\everyfootingxxx #1{\everyfootingyyy #1\|\|\|\|\finish}
\def\everyfootingyyy #1\|#2\|#3\|#4\finish{%
\global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}
\global\oddfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}

% @headings on   turns them on.
% @headings off  turns them off.
% By default, they are off.

\def\headings #1 {\csname HEADINGS#1\endcsname}

\def\HEADINGSoff{
\global\evenheadline={\hfil} \global\evenfootline={\hfil}
\global\oddheadline={\hfil} \global\oddfootline={\hfil}}
\HEADINGSoff
% When we turn headings on, set the page number to 1,
% Put current file name in lower left corner,
% Put chapter name on inside top of right hand pages, document
% title on inside top of left hand pages, and page numbers on outside top
% edge of all pages.
\def\HEADINGSon{
\global\pageno=1
\global\evenfootline={\thisfile\hfil}
\global\oddfootline={\thisfile\hfil}
\global\evenheadline={\line{\folio\hfil\thistitle}}
\global\oddheadline={\line{\thischapter\hfil\folio}}
}

% Subroutines used in generating headings
\def\today{\ifcase\month\or
January\or February\or March\or April\or May\or June\or
July\or August\or September\or October\or November\or December\fi
\space\number\day, \number\year}

% @settitle line...  specifies the title of the document, for headings
% It generates no output of its own

\def\thistitle{No Title}
\def\settitle{\parsearg\settitlezzz}
\def\settitlezzz #1{\gdef\thistitle{#1}}

\message{tables,}

% Tables -- @table, @ftable, @item(x), @kitem(x), @xitem(x).

% default indentation of table text
\newdimen\tableindent \tableindent=.8in
% default indentation of @itemize and @enumerate text
\newdimen\itemindent  \itemindent=.8in
% margin between end of table item and start of table text.
\newdimen\itemmargin  \itemmargin=.1in

% used internally for \itemindent minus \itemmargin
\newdimen\itemmax

% Note @table and @ftable define @item, @itemx, etc., with these defs.
% They also define \itemindex
% to index the item name in whatever manner is desired (perhaps none).

\def\internalBitem{\smallbreak \parsearg\itemzzz}
\def\internalBitemx{\par \parsearg\itemzzz}

\def\internalBxitem "#1"{\def\xitemsubtopix{#1} \smallbreak \parsearg\xitemzzz}
\def\internalBxitemx "#1"{\def\xitemsubtopix{#1} \par \parsearg\xitemzzz}

\def\internalBkitem{\smallbreak \parsearg\kitemzzz}
\def\internalBkitemx{\par \parsearg\kitemzzz}

\def\kitemzzz #1{\dosubind {kw}{#1}{for {\bf \lastfunction}}\itemzzz {#1}}

\def\xitemzzz #1{\dosubind {kw}{#1}{for {\bf \xitemsubtopic}}\itemzzz {#1}}

\def\itemzzz #1{\begingroup %
\advance \hsize by -\rightskip %
\advance \hsize by -\leftskip %
\setbox0=\hbox{\itemfont{#1}}%
\itemindex{#1}%
\parskip=0in %
\noindent %
\ifdim \wd0>\itemmax %
\vadjust{\penalty 10000}%
\hbox to \hsize{\hskip -\tableindent\box0\hss}\ %
\else %
\hbox to 0pt{\hskip -\tableindent\box0\hss}%
\fi %
\endgroup %
}

\def\item{\errmessage{@item while not in a table}}
\def\itemx{\errmessage{@itemx while not in a table}}
\def\kitem{\errmessage{@kitem while not in a table}}
\def\kitemx{\errmessage{@kitemx while not in a table}}
\def\xitem{\errmessage{@xitem while not in a table}}
\def\xitemx{\errmessage{@xitemx while not in a table}}

%% Contains a kludge to get @end[description] to work
\def\description{\tablez{\dontindex}{1}{}{}{}{}}

\def\table{\begingroup\inENV\obeylines\obeyspaces\tablex}
{\obeylines\obeyspaces%
\gdef\tablex #1^^M{%
\tabley\dontindex#1        \endtabley}}

\def\ftable{\begingroup\inENV\obeylines\obeyspaces\ftablex}
{\obeylines\obeyspaces%
\gdef\ftablex #1^^M{%
\tabley\fnitemindex#1        \endtabley}}

\def\dontindex #1{}
\def\fnitemindex #1{\doind {fn}{#1}}%

{\obeyspaces %
\gdef\tabley#1#2 #3 #4 #5 #6 #7\endtabley{\endgroup%
\tablez{#1}{#2}{#3}{#4}{#5}{#6}}}

\def\tablez #1#2#3#4#5#6{%
\aboveenvbreak %
\begingroup %
\def\Edescription{\Etable}% Neccessary kludge.
\let\itemindex=#1%
\ifnum 0#3>0 \advance \leftskip by #3\mil \fi %
\ifnum 0#4>0 \tableindent=#4\mil \fi %
\ifnum 0#5>0 \advance \rightskip by #5\mil \fi %
\def\itemfont{#2}%
\itemmax=\tableindent %
\advance \itemmax by -\itemmargin %
\advance \leftskip by \tableindent %
\parindent = 0pt
\parskip = \smallskipamount
\ifdim \parskip=0pt \parskip=2pt \fi%
\def\Etable{\endgraf\endgroup\afterenvbreak}%
\let\item = \internalBitem %
\let\itemx = \internalBitemx %
\let\kitem = \internalBkitem %
\let\kitemx = \internalBkitemx %
\let\xitem = \internalBxitem %
\let\xitemx = \internalBxitemx %
}

% This is the counter used by @enumerate, which is really @itemize

\newcount \itemno

\def\itemize{\parsearg\itemizezzz}

\def\itemizezzz #1{\itemizey {#1}{\Eitemize}}

\def\itemizey #1#2{%
\aboveenvbreak %
\begingroup %
\itemno = 0 %
\itemmax=\itemindent %
\advance \itemmax by -\itemmargin %
\advance \leftskip by \itemindent %
\parindent = 0pt
\parskip = \smallskipamount
\ifdim \parskip=0pt \parskip=2pt \fi%
\def#2{\endgraf\endgroup\afterenvbreak}%
\def\itemcontents{#1}%
\let\item=\itemizeitem}

\let\ptexbullet=\bullet
\def\bullet{$\ptexbullet$}

\def\enumerate{\itemizey{\the\itemno.}\Eenumerate\flushcr}

% Definition of @item while inside @itemize.

\def\itemizeitem{%
\advance\itemno by 1
{\let\par=\endgraf \smallbreak}%
\ifhmode \errmessage{\in hmode at itemizeitem}\fi
{\parskip=0in \hskip 0pt
\hbox to 0pt{\hss \itemcontents\hskip \itemmargin}%
\vadjust{\penalty 300}}%
\flushcr}

\message{figures,} % Floating insertions, basically
\newcount\figno \figno=0
\def\basicaption{\parsearg\captionx}
\def\captionx #1{\global\advance\figno by 1%
\par{\textfonts\line{\hfil{\bf Figure \the\figno .} #1\hfil}}}
\def\filcaption{\vfil\basicaption}
\def\iEfigure{\smallskip\hrule\endinsert}
\def\fullpagefigure{%
\pageinsert\inENV\let\caption=\filcaption\let\Efullpagefigure=\iEfigure\hrule\smallskip}
\def\figure{% This tries to be near where the command was
\midinsert\inENV\let\caption=\basicaption\let\Efigure=\iEfigure\hrule\smallskip}
\def\topfigure{% This tries to be near the top of a page
\topinsert\inENV\let\caption=\basicaption\let\Etopfigure=\iEfigure\hrule\smallskip}

\message{footnotes,}% Footnotes

\newcount \footnoteno

\def\supereject{\par\penalty -20000\footnoteno =0 }

\let\ptexfootnote=\footnote

{\catcode `\@=11
\gdef\footnote{\global\advance \footnoteno by \@ne
\edef\thisfootno{$^{\the\footnoteno}$}%
\let\@sf\empty
\ifhmode\edef\@sf{\spacefactor\the\spacefactor}\/\fi
\thisfootno\@sf\parsearg\footnotezzz}

\gdef\footnotezzz #1{\insert\footins{
\interlinepenalty\interfootnotelinepenalty
\splittopskip\ht\strutbox % top baseline for broken footnotes
\splitmaxdepth\dp\strutbox \floatingpenalty\@MM
\leftskip\z@skip \rightskip\z@skip \spaceskip\z@skip \xspaceskip\z@skip
\footstrut\hang\textindent{\thisfootno}#1\strut}}

} %end \catcode `\@=11

\message{indexing,}
% Index generation facilities

% Define \newwrite to be identical to plain tex's \newwrite
% except not \outer, so it can be used within \newindex.
{\catcode`\@=11
\gdef\newwrite{\alloc@7\write\chardef\sixt@@n}}

% \newindex {foo} defines an index named foo.
% It automatically defines \fooindex such that
% \fooindex ...rest of line... puts an entry in the index foo.
% It also defines \fooindfile to be the number of the output channel for
% the file that	accumulates this index.  The file's extension is foo.
% The name of an index should be no more than 2 characters long
% for the sake of vms.

\def\newindex #1{
\expandafter\newwrite \csname#1indfile\endcsname% Define number for output file
\openout \csname#1indfile\endcsname \jobname.#1	% Open the file
\expandafter\xdef\csname#1index\endcsname{%	% Define \xxxindex
\noexpand\doindex {#1}}
}

% @defindex foo  ==  \newindex{foo}

\def\defindex{\parsearg\newindex}

% @synindex foo bar    makes index foo feed into index bar.
% Do this instead of @defindex foo if you don't want it as a separate index.
\def\synindex #1 #2 {%
\expandafter \xdef \csname#1index\endcsname {\noexpand\csname#2index\endcsname}%
\expandafter \chardef \csname#1indfile\endcsname %
= \csname#2indfile\endcsname}

% Define \doindex, the driver for all \fooindex macros.
% Argument #1 is generated by the calling \fooindex macro,
%  and it is "foo", the name of the index.

% \doindex just uses \parsearg; it calls \doind for the actual work.
% This is because \doind is more useful to call from other macros.

% There is also \dosubind {index}{topic}{subtopic}
% which makes an entry in a two-level index such as the operation index.

\def\doindex#1{\edef\indexname{#1}\parsearg\singleindexer}
\def\singleindexer #1{\doind{\indexname}{#1}}

\def\indexdummies{%
\def\bf{\realbackslash bf }%
\def\rm{\realbackslash rm }%
\def\sl{\realbackslash sl }%
}

% To define \realbackslash, we must make \ not be an escape.
% We must first make another character (@) an escape
% so we do not become unable to do a definition.

{\catcode`\@=0 \catcode`\\=\other
@gdef@realbackslash{\}}

\let\indexbackslash=0  %overridden during \printindex.

\def\doind #1#2{%
{\indexdummies % Must do this here, since \bf, etc expand at this stage
\count10=\lastpenalty %
{\let\folio=0% Expand all macros now EXCEPT \folio
\def\rawbackslashxx{\indexbackslash}% \indexbackslash isn't defined now
% so it will be output as is; and it will print as backslash in the indx.
\edef\temp{%
\write \csname#1indfile\endcsname{%
\realbackslash entry {#2}{\folio}{#2}}}%
\temp }%
\penalty\count10}}

\def\dosubind #1#2#3{%
{\indexdummies % Must do this here, since \bf, etc expand at this stage
\count10=\lastpenalty %
{\let\folio=0%
\def\rawbackslashxx{\indexbackslash}%
\edef\temp{%
\write \csname#1indfile\endcsname{%
\realbackslash entry {#2 #3}{\folio}{#2}{#3}}}%
\temp }%
\penalty\count10}}

% The index entry written in the file actually looks like
%  \entry {sortstring}{page}{topic}
% or
%  \entry {sortstring}{page}{topic}{subtopic}
% The texindex program reads in these files and writes files
% containing these kinds of lines:
%  \initial {c}
%     before the first topic whose initial is c
%  \entry {topic}{pagelist}
%     for a topic that is used without subtopics
%  \primary {topic}
%     for the beginning of a topic that is used with subtopics
%  \secondary {subtopic}{pagelist}
%     for each subtopic.

% Define the user-accessible indexing commands 
% @findex, @vindex, @kindex, @cindex.

\def\findex {\fnindex}
\def\kindex {\kyindex}
\def\cindex {\cpindex}
\def\vindex {\vrindex}
\def\tindex {\tpindex}
\def\pindex {\pgindex}

\def\cindexsub {\begingroup\obeylines\cindexsub}
{\obeylines %
\gdef\cindexsub "#1" #2^^M{\endgroup %
\dosubind{cp}{#2}{#1}}}

% Define the macros used in formatting output of the sorted index material.

% This is what you call to cause a particular index to get printed.
% Write
% @unnumbered Function Index
% @printindex fn

\def\printindex{\parsearg\doprintindex}

\def\doprintindex#1{\tex %
\catcode`\%=\other\catcode`\&=\other\catcode`\#=\other
\catcode`\@=\other\catcode`\$=\other\catcode`\_=\other
\catcode`\~=\other
\def\indexbackslash{\rawbackslashxx}
\indexfonts\rm \tolerance=9500 \advance\baselineskip -1pt
\begindoublecolumns
\openin 1 \jobname.#1s
\ifeof 1 \else \closein 1 \input \jobname.#1s
\fi
\enddoublecolumns
\Etex}

% These macros are used by the sorted index file itself.
% Change them to control the appearance of the index.

\outer\def\initial #1{\bigbreak\line{\secbf#1\hfill}\kern 2pt\penalty3000}

\outer\def\entry #1#2{
{\parfillskip=0in \parskip=0in \parindent=0in
\hangindent=1in \hangafter=1%
\noindent\hbox{#1}\leaders\Dotsbox\hskip 0pt plus 1filll #2\par
}}

\def\primary #1{\line{#1\hfil}}

\newskip\secondaryindent \secondaryindent=0.5cm

\def\secondary #1#2{
{\parfillskip=0in \parskip=0in
\hangindent =1in \hangafter=1
\noindent\hskip\secondaryindent\hbox{#1}\leaders\Dotsbox\hskip 0pt plus 1filll#2\par
}}

%% Define two-column mode, which is used in indexes.
%% Adapted from the TeXBook, page 416
\catcode `\@=11

\newbox\partialpage

\newdimen\doublecolumnhsize  \doublecolumnhsize = 3.11in
\newdimen\doublecolumnvsize  \doublecolumnvsize = 19.1in

\def\begindoublecolumns{\begingroup
  \output={\global\setbox\partialpage=\vbox{\unvbox255\kern -\topskip \kern \baselineskip}}\eject
  \output={\doublecolumnout} \hsize=\doublecolumnhsize \vsize=\doublecolumnvsize}
\def\enddoublecolumns{\output={\balancecolumns}\eject
  \endgroup \pagegoal=\vsize}

\def\doublecolumnout{\splittopskip=\topskip \splitmaxdepth=\maxdepth
  \dimen@=\pageheight \advance\dimen@ by-\ht\partialpage
  \setbox0=\vsplit255 to\dimen@ \setbox2=\vsplit255 to\dimen@
  \onepageout\pagesofar \unvbox255 \penalty\outputpenalty}
\def\pagesofar{\unvbox\partialpage %
  \wd0=\hsize \wd2=\hsize \hbox to\pagewidth{\box0\hfil\box2}}
\def\balancecolumns{\setbox0=\vbox{\unvbox255} \dimen@=\ht0
  \advance\dimen@ by\topskip \advance\dimen@ by-\baselineskip
  \divide\dimen@ by2 \splittopskip=\topskip
  {\vbadness=10000 \loop \global\setbox3=\copy0
    \global\setbox1=\vsplit3 to\dimen@
    \ifdim\ht3>\dimen@ \global\advance\dimen@ by1pt \repeat}
  \setbox0=\vbox to\dimen@{\unvbox1}  \setbox2=\vbox to\dimen@{\unvbox3}
  \pagesofar}

\catcode `\@=\other
\message{sectioning,}
% Define chapters, sections, etc.

\newcount \chapno
\newcount \secno
\newcount \subsecno
\newcount \subsubsecno

% This counter is funny since it counts through charcodes of letters A, B, ...
\newcount \appendixno  \appendixno = `\@
\def\appendixletter{\char\the\appendixno}

\newwrite \contentsfile
\openout \contentsfile = \jobname.toc

% Each @chapter defines this as the name of the chapter.
% page headings and footings can use it.  @section does likewise

\def\thischapter{} \def\thissection{}
\def\seccheck#1{\if \pageno<0 %
\errmessage{@#1 not allowed after generating table of contents}\fi
%
}

\outer\def\chapter{\parsearg\chapterzzz}
\def\chapterzzz #1{\seccheck{chapter}%
\secno=0 \subsecno=0 \subsubsecno=0 \global\advance \chapno by 1 \message{Chapter \the\chapno}%
\chapmacro {#1}{\the\chapno}%
\gdef\thissection{#1}\gdef\thischapter{#1}%
\edef\temp{{\realbackslash chapentry {#1}{\the\chapno}{\noexpand\folio}}}%
\write \contentsfile \temp  %
\donoderef %
}

\outer\def\appendix{\parsearg\appendixzzz}
\def\appendixzzz #1{\seccheck{appendix}%
\secno=0 \subsecno=0 \subsubsecno=0 \global\advance \appendixno by 1 \message{Appendix \appendixletter}%
\chapmacro {#1}{Appendix \appendixletter}%
\gdef\thischapter{#1}\gdef\thissection{#1}%
\edef\temp{{\realbackslash chapentry {#1}{Appendix \appendixletter}{\noexpand\folio}}}%
\write \contentsfile \temp  %
\donoderef %
}

\outer\def\unnumbered{\parsearg\unnumberedzzz}
\def\unnumberedzzz #1{\seccheck{unnumbered}%
\secno=0 \subsecno=0 \subsubsecno=0 \message{(#1)}
\unnumbchapmacro {#1}%
\gdef\thischapter{#1}\gdef\thissection{#1}%
\edef\temp{{\realbackslash unnumbchapentry {#1}{\noexpand\folio}}}%
\write \contentsfile \temp  %
\donoderef %
}

\outer\def\section{\parsearg\sectionzzz}
\def\sectionzzz #1{\seccheck{section}%
\subsecno=0 \subsubsecno=0 \global\advance \secno by 1 %
\gdef\thissection{#1}\secheading {#1}{\the\chapno}{\the\secno}%
\edef\temp{{\realbackslash secentry %
{#1}{\the\chapno}{\the\secno}{\noexpand\folio}}}%
\write \contentsfile \temp %
\donoderef %
\penalty 10000 %
}

\outer\def\appendixsection{\parsearg\appendixsectionzzz}
\def\appendixsectionzzz #1{\seccheck{appendixsection}%
\subsecno=0 \subsubsecno=0 \global\advance \secno by 1 %
\gdef\thissection{#1}\secheading {#1}{\appendixletter}{\the\secno}%
\edef\temp{{\realbackslash secentry %
{#1}{\appendixletter}{\the\secno}{\noexpand\folio}}}%
\write \contentsfile \temp %
\donoderef %
\penalty 10000 %
}

\outer\def\unnumberedsec{\parsearg\unnumberedseczzz}
\def\unnumberedseczzz #1{\seccheck{unnumberedsec}%
\plainsecheading {#1}\gdef\thissection{#1}%
\edef\temp{{\realbackslash unnumbsecentry %
{#1}{\noexpand\folio}}}%
\write \contentsfile \temp %
\donoderef %
\penalty 10000 %
}

\outer\def\subsection{\parsearg\subsectionzzz}
\def\subsectionzzz #1{\seccheck{subsection}%
\gdef\thissection{#1}\subsubsecno=0 \global\advance \subsecno by 1 %
\subsecheading {#1}{\the\chapno}{\the\secno}{\the\subsecno}%
\edef\temp{{\realbackslash subsecentry %
{#1}{\the\chapno}{\the\secno}{\the\subsecno}{\noexpand\folio}}}%
\write \contentsfile \temp %
\donoderef %
\penalty 10000 %
}

\outer\def\subsubsection{\parsearg\subsubsectionzzz}
\def\subsubsectionzzz #1{\seccheck{subsubsection}%
\gdef\thissection{#1}\global\advance \subsubsecno by 1 %
\subsubsecheading {#1}{\the\chapno}{\the\secno}{\the\subsecno}{\the\subsubsecno}%
\edef\temp{{\realbackslash subsubsecentry %
{#1}{\the\chapno}{\the\secno}{\the\subsecno}{\the\subsubsecno}{\noexpand\folio}}}%\
\write \contentsfile \temp %
\donoderef %
\penalty 10000 %
}

% Define @majorheading, @heading and @subheading

\outer\def\majorheading #1{%
{\advance\chapheadingskip by 10pt \chapbreak }%
{\chapfonts \line{\chaprm #1\hfill}}\bigskip \par\penalty 200}

\outer\def\heading #1{\chapbreak %
{\chapfonts \line{\chaprm #1\hfill}}\bigskip \par\penalty 200}

\let\subheading=\secheadingi
\let\subsubheading=\subsecheadingi

% These macros generate a chapter, section, etc. heading only
% (including whitespace, linebreaking, etc. around it),
% given all the information in convenient, parsed form.

%%% Args are the skip and penalty (usually negative)
\def\dobreak#1#2{\par\ifdim\lastskip<#1\removelastskip\penalty#2\vskip#1\fi}

\def\setchapterstyle #1 {\csname CHAPF#1\endcsname}

%%% Define plain chapter starts, and page on/off switching for it
% Parameter controlling skip before chapter headings (if needed)

\newskip \chapheadingskip \chapheadingskip = 30pt plus 8pt minus 4pt

\def\chapbreak{\dobreak \chapheadingskip {-4000}}
\def\chappager{\par\vfill\supereject}
\def\chapoddpage{\chappager \ifodd\pageno \else \hbox to 0pt{} \chappager\fi}

\def\setchapternewpage #1 {\csname CHAPPAG#1\endcsname}
\def\CHAPPAGoff{\global\let\pchapsepmacro=\chapbreak}
\def\CHAPPAGon{\global\let\pchapsepmacro=\chappager}
\def\CHAPPAGodd{\global\let\pchapsepmacro=\chapoddpage}
\CHAPPAGon

\def\CHAPFplain{
\global\let\chapmacro=\chfplain
\global\let\unnumbchapmacro=\unnchfplain}

\def\chfplain #1#2{%
\pchapsepmacro %
{\chapfonts \line{\chaprm #2.\enspace #1\hfill}}\bigskip \par\penalty 5000 %
}

\def\unnchfplain #1{%
\pchapsepmacro %
{\chapfonts \line{\chaprm #1\hfill}}\bigskip \par\penalty 10000 %
}
\CHAPFplain % The default

\def\unnchfopen #1{%
\chapoddpage {\chapfonts \line{\chaprm #1\hfill}}\bigskip \par\penalty 10000 %
}

\def\chfopen #1#2{\chapoddpage {\chapfonts
\vbox to 3in{\vfil \hbox to\hsize{\hfil #2} \hbox to\hsize{\hfil #1} \vfil}}%
\par\penalty 5000 %
}

\def\CHAPFopen{
\global\let\chapmacro=\chfopen
\global\let\unnumbchapmacro=\unnchfopen}

% Parameter controlling skip before section headings.

\newskip \subsecheadingskip  \subsecheadingskip = 17pt plus 8pt minus 4pt
\def\subsecheadingbreak{\dobreak \subsecheadingskip {-500}}

\newskip \secheadingskip  \secheadingskip = 21pt plus 8pt minus 4pt
\def\secheadingbreak{\dobreak \secheadingskip {-1000}}

\def\secheading #1#2#3{\secheadingi {#2.#3\enspace #1}}
\def\plainsecheading #1{\secheadingi {#1}}
\def\secheadingi #1{{\advance \secheadingskip by \parskip %
\secheadingbreak}%
{\secfonts \line{\secrm #1\hfill}}%
\ifdim \parskip<10pt \kern 10pt\kern -\parskip\fi \penalty 10000 }

\def\subsecheading #1#2#3#4{{\advance \subsecheadingskip by \parskip %
\subsecheadingbreak}%
{\subsecfonts \line{\secrm#2.#3.#4\enspace #1\hfill}}%
\ifdim \parskip<10pt \kern 10pt\kern -\parskip\fi \penalty 10000 }

\def\subsubsecfonts{\subsecfonts} % Maybe this should change

\def\subsubsecheading #1#2#3#4#5{{\advance \subsecheadingskip by \parskip %
\subsecheadingbreak}%
{\subsubsecfonts \line{\secrm#2.#3.#4.#5\enspace #1\hfill}}%
\ifdim \parskip<10pt \kern 10pt\kern -\parskip\fi \penalty 10000}

\message{toc printing,}

\def\Dotsbox{\hbox to 1em{\hss.\hss}} % Used by index macros

\def\finishcontents{%
\ifnum\pageno>0 %
\par\vfill\supereject %
\immediate\closeout \contentsfile%
\pageno=-1		% Request roman numbered pages
\fi}

\outer\def\contents{%
\finishcontents %
\unnumbchapmacro{Table of Contents}
\def\thischapter{Table of Contents}
{\catcode`\\=0
\catcode`\{=1		% Set up to handle contents files properly
\catcode`\}=2
\catcode`\@=11
\input \jobname.toc
}
\vfill \eject}

\outer\def\summarycontents{%
\finishcontents %
\unnumbchapmacro{Summary Table of Contents}
\def\thischapter{Summary Table of Contents}
{\catcode`\\=0
\catcode`\{=1		% Set up to handle contents files properly
\catcode`\}=2
\catcode`\@=11
\def\smallbreak{}
\def\secentry ##1##2##3##4{}
\def\subsecentry ##1##2##3##4##5{}
\def\subsubsecentry ##1##2##3##4##5##6{}
\def\unnumbsecentry ##1##2{}
\let\medbreak=\smallbreak
\input \jobname.toc
}
\vfill \eject}

\outer\def\bye{\par\vfill\supereject\tracingstats=1\ptexend}

% These macros generate individual entries in the table of contents
% The first argument is the chapter or section name.
% The last argument is the page number.
% The arguments in between are the chapter number, section number, ...

\def\chapentry #1#2#3{%
\medbreak
\line{#2.\space#1\leaders\hbox to 1em{\hss.\hss}\hfill #3}
}

\def\unnumbchapentry #1#2{%
\medbreak
\line{#1\leaders\Dotsbox\hfill #2}
}

\def\secentry #1#2#3#4{%
\line{\enspace\enspace#2.#3\space#1\leaders\Dotsbox\hfill#4}
}

\def\unnumbsecentry #1#2{%
\line{\enspace\enspace#1\leaders\Dotsbox\hfill #2}
}

\def\subsecentry #1#2#3#4#5{%
\line{\enspace\enspace\enspace\enspace
#2.#3.#4\space#1\leaders\Dotsbox\hfill #5}
}

\def\subsubsecentry #1#2#3#4#5#6{%
\line{\enspace\enspace\enspace\enspace\enspace\enspace
#2.#3.#4.#5\space#1\leaders\Dotsbox\hfill #6}
}

\message{environments,}

% @tex ... @end tex    escapes into raw Tex temporarily.

\def\tex{\begingroup
\catcode `\\=0 \catcode `\{=1 \catcode `\}=2
\catcode `\$=3 \catcode `\&=4 \catcode `\#=6
\catcode `\^=7 \catcode `\_=8 \catcode `\~=13 \let~=\tie
\let\{=\lbrace \let\}=\rbrace
\let\nobreak=\ptexnobreak
\let\.=\ptexdot
\let\#=\ptexnumsign
\let\*=\ptexstar
\let\+=\tabalign
\let\-=\ptexminus
\let\b=\ptexb \let\c=\ptexc \let\i=\ptexi \let\t=\ptext \let\l=\ptexl
\let\L=\ptexL
\catcode `\%=14 \let\Etex=\endgroup}

% Define @lisp ... @endlisp.
% @lisp does a \begingroup so it can rebind things,
% including the definition of @endlisp (which normally is erroneous).

% Amount to narrow the margins by for @lisp.
\newskip\lispnarrowing \lispnarrowing=0.3in

% This is the definition that ^M gets inside @lisp
% phr: changed space to \null, to avoid overfull hbox problems.
{\obeyspaces%
\gdef\lisppar{\null\endgraf}}

% Cause \obeyspaces to make each Space cause a word-separation
% rather than the default which is that it acts punctuation.
% This is because space in tt font looks funny.
{\obeyspaces %
\gdef\sepspaces{\def {\ }}}

\newskip\aboveenvskipamount \aboveenvskipamount=3pt plus 10pt
\def\aboveenvbreak{{\advance\aboveenvskipamount by \parskip
\endgraf \ifdim\lastskip<\aboveenvskipamount
\removelastskip \penalty-50 \vskip\aboveenvskipamount \fi}}

\def\afterenvbreak{\endgraf \ifdim\lastskip<\aboveenvskipamount
\removelastskip \penalty-50 \vskip\aboveenvskipamount \fi}

\def\lisp{\aboveenvbreak\begingroup\inENV %This group ends at the end of the @lisp body
\hfuzz=12truept % Don't be fussy
% Make spaces be word-separators rather than space tokens.
\sepspaces %
% Single space lines
\singlespace %
% The following causes blank lines not to be ignored
% by adding a space to the end of each line.
\let\par=\lisppar
\def\Elisp{\endgroup\afterenvbreak}%
\parskip=0pt \advance \rightskip by \lispnarrowing 
\advance \leftskip by \lispnarrowing
\parindent=0pt
\let\exdent=\internalexdent
\obeyspaces \obeylines \tt \rawbackslash
\def\next##1{}\next}


\let\example=\lisp
\def\Eexample{\Elisp}

\let\smallexample=\lisp
\def\Esmallexample{\Elisp}

% Macro for 9 pt. examples, necessary to print with 5" lines.
% From Pavel@xerox.  This is not really used unless the
% @smallbook command is given.

\def\smalllispx{\aboveenvbreak\begingroup\inENV
%			This group ends at the end of the @lisp body
\hfuzz=12truept % Don't be fussy
% Make spaces be word-separators rather than space tokens.
\sepspaces %
% Single space lines
\singlespace %
% The following causes blank lines not to be ignored
% by adding a space to the end of each line.
\let\par=\lisppar
\def\Esmalllisp{\endgroup\afterenvbreak}%
\parskip=0pt \advance \rightskip by \lispnarrowing 
\advance \leftskip by \lispnarrowing
\parindent=0pt
\let\exdent=\internalexdent
\obeyspaces \obeylines \ninett \rawbackslash
\def\next##1{}\next}

% This is @display; same as @lisp except use roman font.

\def\display{\begingroup\inENV %This group ends at the end of the @display body
\aboveenvbreak
% Make spaces be word-separators rather than space tokens.
\sepspaces %
% Single space lines
\singlespace %
% The following causes blank lines not to be ignored
% by adding a space to the end of each line.
\let\par=\lisppar
\def\Edisplay{\endgroup\afterenvbreak}%
\parskip=0pt \advance \rightskip by \lispnarrowing 
\advance \leftskip by \lispnarrowing
\parindent=0pt
\let\exdent=\internalexdent
\obeyspaces \obeylines
\def\next##1{}\next}

% This is @format; same as @lisp except use roman font and don't narrow margins

\def\format{\begingroup\inENV %This group ends at the end of the @format body
\aboveenvbreak
% Make spaces be word-separators rather than space tokens.
\sepspaces %
\singlespace %
% The following causes blank lines not to be ignored
% by adding a space to the end of each line.
\let\par=\lisppar
\def\Eformat{\endgroup\afterenvbreak}
\parskip=0pt \parindent=0pt
\obeyspaces \obeylines
\def\next##1{}\next}

% @flushleft and @flushright

\def\flushleft{\begingroup\inENV %This group ends at the end of the @format body
\aboveenvbreak
% Make spaces be word-separators rather than space tokens.
\sepspaces %
% The following causes blank lines not to be ignored
% by adding a space to the end of each line.
% This also causes @ to work when the directive name
% is terminated by end of line.
\let\par=\lisppar
\def\Eflushleft{\endgroup\afterenvbreak}%
\parskip=0pt \parindent=0pt
\obeyspaces \obeylines
\def\next##1{}\next}

\def\flushright{\begingroup\inENV %This group ends at the end of the @format body
\aboveenvbreak
% Make spaces be word-separators rather than space tokens.
\sepspaces %
% The following causes blank lines not to be ignored
% by adding a space to the end of each line.
% This also causes @ to work when the directive name
% is terminated by end of line.
\let\par=\lisppar
\def\Eflushright{\endgroup\afterenvbreak}%
\parskip=0pt \parindent=0pt
\advance \leftskip by 0pt plus 1fill
\obeyspaces \obeylines
\def\next##1{}\next}

% @quotation - narrow the margins.

\def\quotation{\begingroup\inENV %This group ends at the end of the @quotation body
{\parskip=0pt  % because we will skip by \parskip too, later
\aboveenvbreak}%
\singlespace
\parindent=0pt
\def\Equotation{\par\endgroup\afterenvbreak}%
\advance \rightskip by \lispnarrowing 
\advance \leftskip by \lispnarrowing}

% @undent - make every paragraph have a hanging indentation

\def\undent{\begingroup %This group ends at the end of the @undent body
\def\Eundent{\par\endgroup}%
\everypar={\hangindent=\parindent \hskip-\parindent \hangafter=1 }}

\message{cross reference,}
% Define cross-reference macros
\newwrite \auxfile

% \setref{foo} defines a cross-reference point named foo.

\def\setref#1{%
\dosetq{#1-pg}{Ypagenumber}%
\dosetq{#1-snt}{Ysectionnumberandtype}}

% \xref and \pxref generate cross references to specified points.

\def\pxref #1{see \xrefX [#1,,,,,,,]}
\def\xref #1{See \xrefX [#1,,,,,,,]}
\def\xrefX [#1,#2,#3,#4,#5,#6]{\refx{#1-snt} [%
{\setbox0=\hbox{\losespace#3{}}%
\ifdim \wd0 =0pt \losespace#1{}\else\unhbox0\fi}],
page\tie \refx{#1-pg}}

% \dosetq is the interface for calls from other macros

\def\dosetq #1#2{{\let\folio=0%
\edef\next{\write\auxfile{\internalsetq {#1}{#2}}}%
\next}}

% \internalsetq {foo}{page} expands into CHARACTERS 'xrdef {foo}{...expansion of \Ypage...}
% When the aux file is read, ' is the escape character

\def\internalsetq #1#2{'xrdef {#1}{\csname #2\endcsname}}

% Things to be expanded by \internalsetq

\def\Ypagenumber{\folio}

\def\Ysectionnumberandtype{%
\ifnum\secno=0 chapter\xreftie\the\chapno %
\else \ifnum \subsecno=0 section\xreftie\the\chapno.\the\secno %
\else \ifnum \subsubsecno=0 %
section\xreftie\the\chapno.\the\secno.\the\subsecno %
\else %
section\xreftie\the\chapno.\the\secno.\the\subsecno.\the\subsubsecno %
\fi \fi \fi }

\gdef\xreftie{'tie}

% Define @refx to reference a specific cross-reference string.

\def\refx#1{%
{%
\setbox0=\hbox{\csname X#1\endcsname}%
\ifdim\wd0>0in \else  	% If not defined, say something at least.
\expandafter\gdef\csname X#1\endcsname {$<$undefined$>$}%
\message {WARNING: Cross-reference "#1" used but not yet defined}%
\message {}%
\fi %
\csname X#1\endcsname %It's defined, so just use it.
}}

% Read the last existing aux file, if any.  No error if none exists.

% This is the macro invoked by entries in the aux file.
\def\xrdef #1#2{
{\catcode`\'=\other\expandafter \gdef \csname X#1\endcsname {#2}}}

{
\catcode `\^^@=\other
\catcode `\
=\other
\catcode `\=\other
\catcode `\^^C=\other
\catcode `\^^D=\other
\catcode `\^^E=\other
\catcode `\^^F=\other
\catcode `\^^G=\other
\catcode `\^^H=\other
\catcode `\=\other
\catcode `\^^L=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\^^[=\other
\catcode `\^^\=\other
\catcode `\^^]=\other
\catcode `\^^^=\other
\catcode `\^^_=\other
\catcode `\@=\other
\catcode `\^=\other
\catcode `\~=\other
\catcode `\[=\other
\catcode `\]=\other
\catcode`\"=\other
\catcode`\_=\other
\catcode`\|=\other
\catcode`\<=\other
\catcode`\>=\other
\catcode `\$=\other
\catcode `\#=\other
\catcode `\&=\other

% the aux file uses ' as the escape.
% Turn off \ as an escape so we do not lose on
% entries which were dumped with control sequences in their names.
% For example, 'xrdef {$\leq $-fun}{page ...} made by @defun ^^
% Reference to such entries still does not work the way one would wish,
% but at least they do not bomb out when the aux file is read in.

\catcode `\{=1 \catcode `\}=2
\catcode `\%=\other
\catcode `\'=0
\catcode `\\=\other

'openin 1 'jobname.aux
'ifeof 1 'else 'closein 1 'input 'jobname.aux
'fi
}

% Open the new aux file.  Tex will close it automatically at exit.

\openout \auxfile=\jobname.aux

% End of control word definitions.

\message{and turning on texinfo input format.}

\newindex{cp}
\newindex{fn}
\newindex{vr}
\newindex{tp}
\newindex{ky}
\newindex{pg}

% Set some numeric style parameters, for 8.5 x 11 format.

\hsize = 6.5in
\parindent 15pt
\parskip 18pt plus 1pt
\aboveenvskipamount 0pt plus 3pt
\baselineskip 15pt
\itemindent = 0.3in
\tableindent = 0.8in
\lispnarrowing = 0.4in

% Use @smallbook to reset parameters for 7x9.5 format
\def\smallbook{
\global\lispnarrowing = 0.3in
\global\baselineskip 12pt
\global\parskip 3pt plus 1pt
\global\hsize = 5in
\global\doublecolumnhsize=2.4in \global\doublecolumnvsize=15.0in
\global\vsize=7.5in
\global\tolerance=700
\global\hfuzz=1pt

\global\font\ninett=amtt9

\global\let\smalllisp=\smalllispx
\global\let\smallexample=\smalllispx
\global\def\Esmallexample{\Esmalllisp}
}

%% For a final copy, take out the rectangles
%% that mark overfull boxes (in case you have decided
%% that the text looks ok even though it passes the margin).
\def\finalout{\overfullrule=0pt}

% Turn off all special characters except @
% (and those which the user can use as if they were ordinary)
% Define certain chars to be always in tt font.

\catcode`\"=\active
\def\activedoublequote{{\tt \char '042}}
\let"=\activedoublequote
\catcode`\~=\active
\def~{{\tt \char '176}}
\chardef\hat=`\^
\catcode`\^=\active
\def^{{\tt \hat}}
\catcode`\_=\active
\def_{{\tt \char '137}}
\catcode`\|=\active
\def|{{\tt \char '174}}
\chardef \less=`\<
\catcode`\<=\active
\def<{{\tt \less}}
\chardef \gtr=`\>
\catcode`\>=\active
\def>{{\tt \gtr}}

\catcode`\@=0

% \rawbackslashxx output one backslash character in current font
{\catcode`\\=\other
@gdef@rawbackslashxx{\}}

% \rawbackslash redefines \ as input to do \rawbackslashxx.
{\catcode`\\=\active
@gdef@rawbackslash{@let\=@rawbackslashxx }}

% \normalbackslash outputs one backslash in fixed width font.
\def\normalbackslash{{\tt\rawbackslashxx}}

%% These look ok in all fonts, so just make them not special.  The @rm below
%% makes sure that the current font starts out as the newly loaded cmr10
\catcode`\$=\other \catcode`\%=\other \catcode`\&=\other \catcode`\#=\other

\catcode 17=0   @c Define control-q
\catcode`\\=\active
@let\=@normalbackslash

@textfonts
@rm