%% TeX macros to handle texinfo files
% Copyright (C) 1985, 86, 88, 90, 91, 92, 93, 1994 Free Software Foundation, Inc.
%This texinfo.tex file is free software; you can redistribute it and/or
%modify it under the terms of the GNU General Public License as
%published by the Free Software Foundation; either version 2, or (at
%your option) any later version.
%This texinfo.tex 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. See the GNU
%General Public License for more details.
%You should have received a copy of the GNU General Public License
%along with this texinfo.tex file; see the file COPYING. If not, write
%to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
%USA.
%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!
% This automatically updates the version number based on RCS.
\def\deftexinfoversion$#1: #2 ${\def\texinfoversion{#2}}
\deftexinfoversion$Revision$
\message{Loading texinfo package [Version \texinfoversion]:}
% Print the version number if in a .fmt file.
\everyjob{\message{[Texinfo version \texinfoversion]}\message{}}
% Save some parts of plain tex whose names we will redefine.
\let\ptextilde=\~
\let\ptexlbrace=\{
\let\ptexrbrace=\}
\let\ptexdots=\dots
\let\ptexdot=\.
\let\ptexstar=\*
\let\ptexend=\end
\let\ptexbullet=\bullet
\let\ptexb=\b
\let\ptexc=\c
\let\ptexi=\i
\let\ptext=\t
\let\ptexl=\l
\let\ptexL=\L
% Be sure we're in horizontal mode when doing a tie, since we make space
% equivalent to this in @example-like environments. Otherwise, a space
% at the beginning of a line will start with \penalty -- and
% since \penalty is valid in vertical mode, we'd end up putting the
% penalty on the vertical list instead of in the new paragraph.
{\catcode`@ = 11
\gdef\tie{\leavevmode\penalty\@M\ }
}
\let\~ = \tie % And make it available as @~.
\message{Basics,}
\chardef\other=12
% If this character appears in an error message or help string, it
% starts a new line in the output.
\newlinechar = `^^J
% Set up fixed words for English.
\ifx\putwordChapter\undefined{\gdef\putwordChapter{Chapter}}\fi%
\def\putwordInfo{Info}%
\ifx\putwordSee\undefined{\gdef\putwordSee{See}}\fi%
\ifx\putwordsee\undefined{\gdef\putwordsee{see}}\fi%
\ifx\putwordfile\undefined{\gdef\putwordfile{file}}\fi%
\ifx\putwordpage\undefined{\gdef\putwordpage{page}}\fi%
\ifx\putwordsection\undefined{\gdef\putwordsection{section}}\fi%
\ifx\putwordSection\undefined{\gdef\putwordSection{Section}}\fi%
\ifx\putwordTableofContents\undefined{\gdef\putwordTableofContents{Table of Contents}}\fi%
\ifx\putwordShortContents\undefined{\gdef\putwordShortContents{Short Contents}}\fi%
\ifx\putwordAppendix\undefined{\gdef\putwordAppendix{Appendix}}\fi%
% Ignore a token.
%
\def\gobble#1{}
\hyphenation{ap-pen-dix}
\hyphenation{mini-buf-fer mini-buf-fers}
\hyphenation{eshell}
% 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
% Sometimes it is convenient to have everything in the transcript file
% and nothing on the terminal. We don't just call \tracingall here,
% since that produces some useless output on the terminal.
%
\def\gloggingall{\begingroup \globaldefs = 1 \loggingall \endgroup}%
\def\loggingall{\tracingcommands2 \tracingstats2
\tracingpages1 \tracingoutput1 \tracinglostchars1
\tracingmacros2 \tracingparagraphs1 \tracingrestores1
\showboxbreadth\maxdimen\showboxdepth\maxdimen
}%
%---------------------Begin change-----------------------
%
%%%% For @cropmarks command.
% Dimensions to add cropmarks at corners Added by P. A. MacKay, 12 Nov. 1986
%
\newdimen\cornerlong \newdimen\cornerthick
\newdimen \topandbottommargin
\newdimen \outerhsize \newdimen \outervsize
\cornerlong=1pc\cornerthick=.3pt % These set size of cropmarks
\outerhsize=7in
%\outervsize=9.5in
% Alternative @smallbook page size is 9.25in
\outervsize=9.25in
\topandbottommargin=.75in
%
%---------------------End change-----------------------
% \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
{\escapechar=`\\\relax % makes sure backslash is used in output files.
\shipout\vbox{{\let\hsize=\pagewidth \makeheadline} \pagebody{#1}%
{\let\hsize=\pagewidth \makefootline}}}%
\advancepageno \ifnum\outputpenalty>-20000 \else\dosupereject\fi}
%%%% For @cropmarks command %%%%
% Here is a modification of the main output routine for Near East Publications
% This provides right-angle cropmarks at all four corners.
% The contents of the page are centerlined into the cropmarks,
% and any desired binding offset is added as an \hskip on either
% site of the centerlined box. (P. A. MacKay, 12 November, 1986)
%
\def\croppageout#1{\hoffset=0pt % make sure this doesn't mess things up
{\escapechar=`\\\relax % makes sure backslash is used in output files.
\shipout
\vbox to \outervsize{\hsize=\outerhsize
\vbox{\line{\ewtop\hfill\ewtop}}
\nointerlineskip
\line{\vbox{\moveleft\cornerthick\nstop}
\hfill
\vbox{\moveright\cornerthick\nstop}}
\vskip \topandbottommargin
\centerline{\ifodd\pageno\hskip\bindingoffset\fi
\vbox{
{\let\hsize=\pagewidth \makeheadline}
\pagebody{#1}
{\let\hsize=\pagewidth \makefootline}}
\ifodd\pageno\else\hskip\bindingoffset\fi}
\vskip \topandbottommargin plus1fill minus1fill
\boxmaxdepth\cornerthick
\line{\vbox{\moveleft\cornerthick\nsbot}
\hfill
\vbox{\moveright\cornerthick\nsbot}}
\nointerlineskip
\vbox{\line{\ewbot\hfill\ewbot}}
}}
\advancepageno
\ifnum\outputpenalty>-20000 \else\dosupereject\fi}
%
% Do @cropmarks to get crop marks
\def\cropmarks{\let\onepageout=\croppageout }
\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}
}
%
% Here are the rules for the cropmarks. Note that they are
% offset so that the space between them is truly \outerhsize or \outervsize
% (P. A. MacKay, 12 November, 1986)
%
\def\ewtop{\vrule height\cornerthick depth0pt width\cornerlong}
\def\nstop{\vbox
{\hrule height\cornerthick depth\cornerlong width\cornerthick}}
\def\ewbot{\vrule height0pt depth\cornerthick width\cornerlong}
\def\nsbot{\vbox
{\hrule height\cornerlong depth\cornerthick width\cornerthick}}
% Parse an argument, then pass it to #1. The argument is the rest of
% the input line (except we remove a trailing comment). #1 should be a
% macro which expects an ordinary undelimited TeX argument.
%
\def\parsearg#1{%
\let\next = #1%
\begingroup
\obeylines
\futurelet\temp\parseargx
}
% If the next token is an obeyed space (from an @example environment or
% the like), remove it and recurse. Otherwise, we're done.
\def\parseargx{%
% \obeyedspace is defined far below, after the definition of \sepspaces.
\ifx\obeyedspace\temp
\expandafter\parseargdiscardspace
\else
\expandafter\parseargline
\fi
}
% Remove a single space (as the delimiter token to the macro call).
{\obeyspaces %
\gdef\parseargdiscardspace {\futurelet\temp\parseargx}}
{\obeylines %
\gdef\parseargline#1^^M{%
\endgroup % End of the group started in \parsearg.
%
% First remove any @c comment, then any @comment.
% Result of each macro is put in \toks0.
\argremovec #1\c\relax %
\expandafter\argremovecomment \the\toks0 \comment\relax %
%
% Call the caller's macro, saved as \next in \parsearg.
\expandafter\next\expandafter{\the\toks0}%
}%
}
% Since all \c{,omment} does is throw away the argument, we can let TeX
% do that for us. The \relax here is matched by the \relax in the call
% in \parseargline; it could be more or less anything, its purpose is
% just to delimit the argument to the \c.
\def\argremovec#1\c#2\relax{\toks0 = {#1}}
\def\argremovecomment#1\comment#2\relax{\toks0 = {#1}}
% \argremovec{,omment} might leave us with trailing spaces, though; e.g.,
% @end itemize @c foo
% will have two active spaces as part of the argument with the
% `itemize'. Here we remove all active spaces from #1, and assign the
% result to \toks0.
%
% This loses if there are any *other* active characters besides spaces
% in the argument -- _ ^ +, for example -- since they get expanded.
% Fortunately, Texinfo does not define any such commands. (If it ever
% does, the catcode of the characters in questionwill have to be changed
% here.) But this means we cannot call \removeactivespaces as part of
% \argremovec{,omment}, since @c uses \parsearg, and thus the argument
% that \parsearg gets might well have any character at all in it.
%
\def\removeactivespaces#1{%
\begingroup
\ignoreactivespaces
\edef\temp{#1}%
\global\toks0 = \expandafter{\temp}%
\endgroup
}
% Change the active space to expand to nothing.
%
\begingroup
\obeyspaces
\gdef\ignoreactivespaces{\obeyspaces\let =\empty}
\endgroup
\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.
%
\def\end{\parsearg\endxxx}
\def\endxxx #1{%
\removeactivespaces{#1}%
\edef\endthing{\the\toks0}%
%
\expandafter\ifx\csname E\endthing\endcsname\relax
\expandafter\ifx\csname \endthing\endcsname\relax
% There's no \foo, i.e., no ``environment'' foo.
\errhelp = \EMsimple
\errmessage{Undefined command `@end \endthing'}%
\else
\unmatchedenderror\endthing
\fi
\else
% Everything's ok; the right environment has been started.
\csname E\endthing\endcsname
\fi
}
% There is an environment #1, but it hasn't been started. Give an error.
%
\def\unmatchedenderror#1{%
\errhelp = \EMsimple
\errmessage{This `@end #1' doesn't have a matching `@#1'}%
}
% Define the control sequence \E#1 to give an unmatched @end error.
%
\def\defineunmatchedend#1{%
\expandafter\def\csname E#1\endcsname{\unmatchedenderror{#1}}%
}
% Single-spacing is done by various environments (specifically, in
% \nonfillstart and \quotations).
\newskip\singlespaceskip \singlespaceskip = 12.5pt
\def\singlespace{%
% Why was this kern here? It messes up equalizing space above and below
% environments. --karl, 6may93
%{\advance \baselineskip by -\singlespaceskip
%\kern \baselineskip}%
\setleading \singlespaceskip
}
%% Simple single-character @ commands
% @@ prints an @
% Kludge this until the fonts are right (grr).
\def\@{{\tt \char '100}}
% This is turned off because it was never documented
% and you can use @w{...} around a quote to suppress ligatures.
%% Define @` and @' to be the same as ` and '
%% but suppressing ligatures.
%\def\`{{`}}
%\def\'{{'}}
% Used to generate quoted braces.
\def\mylbrace {{\tt \char '173}}
\def\myrbrace {{\tt \char '175}}
\let\{=\mylbrace
\let\}=\myrbrace
% @: forces normal size whitespace following.
\def\:{\spacefactor=1000 }
% @* forces a line break.
\def\*{\hfil\break\hbox{}\ignorespaces}
% @. is an end-of-sentence period.
\def\.{.\spacefactor=3000 }
% @enddots{} is an end-of-sentence ellipsis.
\gdef\enddots{$\mathinner{\ldotp\ldotp\ldotp\ldotp}$\spacefactor=3000}
% @! is an end-of-sentence bang.
\gdef\!{!\spacefactor=3000 }
% @? is an end-of-sentence query.
\gdef\?{?\spacefactor=3000 }
% @w prevents a word break. Without the \leavevmode, @w at the
% beginning of a paragraph, when TeX is still in vertical mode, would
% produce a whole line of output instead of starting the paragraph.
\def\w#1{\leavevmode\hbox{#1}}
% @group ... @end group forces ... to be all on one page, by enclosing
% it in a TeX vbox. We use \vtop instead of \vbox to construct the box
% to keep its height that of a normal line. According to the rules for
% \topskip (p.114 of the TeXbook), the glue inserted is
% max (\topskip - \ht (first item), 0). If that height is large,
% therefore, no glue is inserted, and the space between the headline and
% the text is small, which looks bad.
%
\def\group{\begingroup
\ifnum\catcode13=\active \else
\errhelp = \groupinvalidhelp
\errmessage{@group invalid in context where filling is enabled}%
\fi
%
% The \vtop we start below produces a box with normal height and large
% depth; thus, TeX puts \baselineskip glue before it, and (when the
% next line of text is done) \lineskip glue after it. (See p.82 of
% the TeXbook.) Thus, space below is not quite equal to space
% above. But it's pretty close.
\def\Egroup{%
\egroup % End the \vtop.
\endgroup % End the \group.
}%
%
\vtop\bgroup
% We have to put a strut on the last line in case the @group is in
% the midst of an example, rather than completely enclosing it.
% Otherwise, the interline space between the last line of the group
% and the first line afterwards is too small. But we can't put the
% strut in \Egroup, since there it would be on a line by itself.
% Hence this just inserts a strut at the beginning of each line.
\everypar = {\strut}%
%
% Since we have a strut on every line, we don't need any of TeX's
% normal interline spacing.
\offinterlineskip
%
% OK, but now we have to do something about blank
% lines in the input in @example-like environments, which normally
% just turn into \lisppar, which will insert no space now that we've
% turned off the interline space. Simplest is to make them be an
% empty paragraph.
\ifx\par\lisppar
\edef\par{\leavevmode \par}%
%
% Reset ^^M's definition to new definition of \par.
\obeylines
\fi
%
% Do @comment since we are called inside an environment such as
% @example, where each end-of-line in the input causes an
% end-of-line in the output. We don't want the end-of-line after
% the `@group' to put extra space in the output. Since @group
% should appear on a line by itself (according to the Texinfo
% manual), we don't worry about eating any user text.
\comment
}
%
% TeX puts in an \escapechar (i.e., `@') at the beginning of the help
% message, so this ends up printing `@group can only ...'.
%
\newhelp\groupinvalidhelp{%
group can only be used in environments such as @example,^^J%
where each line of input produces a line of output.}
% @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}
% Old definition--didn't work.
%\def\needx #1{\par %
%% This method tries to make TeX break the page naturally
%% if the depth of the box does not fit.
%{\baselineskip=0pt%
%\vtop to #1\mil{\vfil}\kern -#1\mil\penalty 10000
%\prevdepth=-1000pt
%}}
\def\needx#1{%
% Go into vertical mode, so we don't make a big box in the middle of a
% paragraph.
\par
%
% Don't add any leading before our big empty box, but allow a page
% break, since the best break might be right here.
\allowbreak
\nointerlineskip
\vtop to #1\mil{\vfil}%
%
% TeX does not even consider page breaks if a penalty added to the
% main vertical list is 10000 or more. But in order to see if the
% empty box we just added fits on the page, we must make it consider
% page breaks. On the other hand, we don't want to actually break the
% page after the empty box. So we use a penalty of 9999.
%
% There is an extremely small chance that TeX will actually break the
% page at this \penalty, if there are no other feasible breakpoints in
% sight. (If the user is using lots of big @group commands, which
% almost-but-not-quite fill up a page, TeX will have a hard time doing
% good page breaking, for example.) However, I could not construct an
% example where a page broke at this \penalty; if it happens in a real
% document, then we can reconsider our strategy.
\penalty9999
%
% Back up by the size of the box, whether we did a page break or not.
\kern -#1\mil
%
% Do not allow a page break right after this kern.
\nobreak
}
% @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
% This records the amount of indent in the innermost environment.
% That's how much \exdent should take out.
\newskip\exdentamount
% This defn is used inside fill environments such as @defun.
\def\exdent{\parsearg\exdentyyy}
\def\exdentyyy #1{{\hfil\break\hbox{\kern -\exdentamount{\rm#1}}\hfil\break}}
% This defn is used inside nofill environments such as @example.
\def\nofillexdent{\parsearg\nofillexdentyyy}
\def\nofillexdentyyy #1{{\advance \leftskip by -\exdentamount
\leftline{\hskip\leftskip{\rm#1}}}}
%\hbox{{\rm#1}}\hfil\break}}
% @include file insert text of that file as input.
\def\include{\parsearg\includezzz}
%Use \input\thisfile to avoid blank after \input, which may be an active
%char (in which case the blank would become the \input argument).
%The grouping keeps the value of \thisfile correct even when @include
%is nested.
\def\includezzz #1{\begingroup
\def\thisfile{#1}\input\thisfile
\endgroup}
\def\thisfile{}
% @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{\catcode 64=\other \catcode 123=\other \catcode 125=\other%
\parsearg \commentxxx}
\def\commentxxx #1{\catcode 64=0 \catcode 123=1 \catcode 125=2 }
\let\c=\comment
% Prevent errors for section commands.
% Used in @ignore and in failing conditionals.
\def\ignoresections{%
\let\chapter=\relax
\let\unnumbered=\relax
\let\top=\relax
\let\unnumberedsec=\relax
\let\unnumberedsection=\relax
\let\unnumberedsubsec=\relax
\let\unnumberedsubsection=\relax
\let\unnumberedsubsubsec=\relax
\let\unnumberedsubsubsection=\relax
\let\section=\relax
\let\subsec=\relax
\let\subsubsec=\relax
\let\subsection=\relax
\let\subsubsection=\relax
\let\appendix=\relax
\let\appendixsec=\relax
\let\appendixsection=\relax
\let\appendixsubsec=\relax
\let\appendixsubsection=\relax
\let\appendixsubsubsec=\relax
\let\appendixsubsubsection=\relax
\let\contents=\relax
\let\smallbook=\relax
\let\titlepage=\relax
}
% Used in nested conditionals, where we have to parse the Texinfo source
% and so want to turn off most commands, in case they are used
% incorrectly.
%
\def\ignoremorecommands{%
\let\defcv = \relax
\let\deffn = \relax
\let\deffnx = \relax
\let\defindex = \relax
\let\defivar = \relax
\let\defmac = \relax
\let\defmethod = \relax
\let\defop = \relax
\let\defopt = \relax
\let\defspec = \relax
\let\deftp = \relax
\let\deftypefn = \relax
\let\deftypefun = \relax
\let\deftypevar = \relax
\let\deftypevr = \relax
\let\defun = \relax
\let\defvar = \relax
\let\defvr = \relax
\let\ref = \relax
\let\xref = \relax
\let\printindex = \relax
\let\pxref = \relax
\let\settitle = \relax
\let\include = \relax
\let\lowersections = \relax
\let\down = \relax
\let\raisesections = \relax
\let\up = \relax
\let\set = \relax
\let\clear = \relax
\let\item = \relax
\let\message = \relax
}
% Ignore @ignore ... @end ignore.
%
\def\ignore{\doignore{ignore}}
% Also ignore @ifinfo, @ifhtml, @html, @menu, and @direntry text.
%
\def\ifinfo{\doignore{ifinfo}}
\def\ifhtml{\doignore{ifhtml}}
\def\html{\doignore{html}}
\def\menu{\doignore{menu}}
\def\direntry{\doignore{direntry}}
% Ignore text until a line `@end #1'.
%
\def\doignore#1{\begingroup
% Don't complain about control sequences we have declared \outer.
\ignoresections
%
% Define a command to swallow text until we reach `@end #1'.
\long\def\doignoretext##1\end #1{\enddoignore}%
%
% Make sure that spaces turn into tokens that match what \doignoretext wants.
\catcode32 = 10
%
% And now expand that command.
\doignoretext
}
% What we do to finish off ignored text.
%
\def\enddoignore{\endgroup\ignorespaces}%
\newif\ifwarnedobs\warnedobsfalse
\def\obstexwarn{%
\ifwarnedobs\relax\else
% We need to warn folks that they may have trouble with TeX 3.0.
% This uses \immediate\write16 rather than \message to get newlines.
\immediate\write16{}
\immediate\write16{***WARNING*** for users of Unix TeX 3.0!}
\immediate\write16{This manual trips a bug in TeX version 3.0 (tex hangs).}
\immediate\write16{If you are running another version of TeX, relax.}
\immediate\write16{If you are running Unix TeX 3.0, kill this TeX process.}
\immediate\write16{ Then upgrade your TeX installation if you can.}
\immediate\write16{If you are stuck with version 3.0, run the}
\immediate\write16{ script ``tex3patch'' from the Texinfo distribution}
\immediate\write16{ to use a workaround.}
\immediate\write16{}
\warnedobstrue
\fi
}
% **In TeX 3.0, setting text in \nullfont hangs tex. For a
% workaround (which requires the file ``dummy.tfm'' to be installed),
% uncomment the following line:
%%%%%\font\nullfont=dummy\let\obstexwarn=\relax
% Ignore text, except that we keep track of conditional commands for
% purposes of nesting, up to an `@end #1' command.
%
\def\nestedignore#1{%
\obstexwarn
% We must actually expand the ignored text to look for the @end
% command, so that nested ignore constructs work. Thus, we put the
% text into a \vbox and then do nothing with the result. To minimize
% the change of memory overflow, we follow the approach outlined on
% page 401 of the TeXbook: make the current font be a dummy font.
%
\setbox0 = \vbox\bgroup
% Don't complain about control sequences we have declared \outer.
\ignoresections
%
% Define `@end #1' to end the box, which will in turn undefine the
% @end command again.
\expandafter\def\csname E#1\endcsname{\egroup\ignorespaces}%
%
% We are going to be parsing Texinfo commands. Most cause no
% trouble when they are used incorrectly, but some commands do
% complicated argument parsing or otherwise get confused, so we
% undefine them.
%
% We can't do anything about stray @-signs, unfortunately;
% they'll produce `undefined control sequence' errors.
\ignoremorecommands
%
% Set the current font to be \nullfont, a TeX primitive, and define
% all the font commands to also use \nullfont. We don't use
% dummy.tfm, as suggested in the TeXbook, because not all sites
% might have that installed. Therefore, math mode will still
% produce output, but that should be an extremely small amount of
% stuff compared to the main input.
%
\nullfont
\let\tenrm = \nullfont \let\tenit = \nullfont \let\tensl = \nullfont
\let\tenbf = \nullfont \let\tentt = \nullfont \let\smallcaps = \nullfont
|