WebSVN - shark - Blame - Rev 3 - /shark/trunk/ports/fftw/doc/texinfo.tex

Rev	Author	Line No.	Line
2	pj	1	% texinfo.tex -- TeX macros to handle Texinfo files.
		2	%
		3	% Load plain if necessary, i.e., if running under initex.
		4	\expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
		5	%
		6	\def\texinfoversion{1999-01-05}%
		7	%
		8	% Copyright (C) 1985, 86, 88, 90, 91, 92, 93, 94, 95, 96, 97, 98
		9	% Free Software Foundation, Inc.
		10	%
		11	% This texinfo.tex file is free software; you can redistribute it and/or
		12	% modify it under the terms of the GNU General Public License as
		13	% published by the Free Software Foundation; either version 2, or (at
		14	% your option) any later version.
		15	%
		16	% This texinfo.tex file is distributed in the hope that it will be
		17	% useful, but WITHOUT ANY WARRANTY; without even the implied warranty
		18	% of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		19	% General Public License for more details.
		20	%
		21	% You should have received a copy of the GNU General Public License
		22	% along with this texinfo.tex file; see the file COPYING. If not, write
		23	% to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
		24	% Boston, MA 02111-1307, USA.
		25	%
		26	% In other words, you are welcome to use, share and improve this program.
		27	% You are forbidden to forbid anyone else to use, share and improve
		28	% what you give them. Help stamp out software-hoarding!
		29	%
		30	% Please try the latest version of texinfo.tex before submitting bug
		31	% reports; you can get the latest version from:
		32	% ftp://ftp.gnu.org/pub/gnu/texinfo.tex
		33	% /home/gd/gnu/doc/texinfo.tex on the GNU machines.
		34	% (and all GNU mirrors, see http://www.gnu.org/order/ftp.html)
		35	% ftp://tug.org/tex/texinfo.tex
		36	% ftp://ctan.org/macros/texinfo/texinfo.tex
		37	% (and all CTAN mirrors, finger ctan@ctan.org for a list).
		38	% The texinfo.tex in the texinfo distribution itself could well be out
		39	% of date, so if that's what you're using, please check.
		40	%
		41	% Send bug reports to bug-texinfo@gnu.org.
		42	% Please include a precise test case in each bug report,
		43	% including a complete document with which we can reproduce the problem.
		44	%
		45	% To process a Texinfo manual with TeX, it's most reliable to use the
		46	% texi2dvi shell script that comes with the distribution. For simple
		47	% manuals, however, you can get away with:
		48	% tex foo.texi
		49	% texindex foo.??
		50	% tex foo.texi
		51	% tex foo.texi
		52	% dvips foo.dvi -o # or whatever, to process the dvi file.
		53	% The extra runs of TeX get the cross-reference information correct.
		54	% Sometimes one run after texindex suffices, and sometimes you need more
		55	% than two; texi2dvi does it as many times as necessary.
		56
		57	\message{Loading texinfo [version \texinfoversion]:}
		58
		59	% If in a .fmt file, print the version number
		60	% and turn on active characters that we couldn't do earlier because
		61	% they might have appeared in the input file name.
		62	\everyjob{\message{[Texinfo version \texinfoversion]}%
		63	\catcode`+=\active \catcode`\_=\active}
		64
		65	% Save some parts of plain tex whose names we will redefine.
		66
		67	\let\ptexb=\b
		68	\let\ptexbullet=\bullet
		69	\let\ptexc=\c
		70	\let\ptexcomma=\,
		71	\let\ptexdot=\.
		72	\let\ptexdots=\dots
		73	\let\ptexend=\end
		74	\let\ptexequiv=\equiv
		75	\let\ptexexclam=\!
		76	\let\ptexi=\i
		77	\let\ptexlbrace=\{
		78	\let\ptexrbrace=\}
		79	\let\ptexstar=\*
		80	\let\ptext=\t
		81
		82	% We never want plain's outer \+ definition in Texinfo.
		83	% For @tex, we can use \tabalign.
		84	\let\+ = \relax
		85
		86
		87	\message{Basics,}
		88	\chardef\other=12
		89
		90	% If this character appears in an error message or help string, it
		91	% starts a new line in the output.
		92	\newlinechar = `^^J
		93
		94	% Set up fixed words for English if not already set.
		95	\ifx\putwordAppendix\undefined \gdef\putwordAppendix{Appendix}\fi
		96	\ifx\putwordChapter\undefined \gdef\putwordChapter{Chapter}\fi
		97	\ifx\putwordfile\undefined \gdef\putwordfile{file}\fi
		98	\ifx\putwordInfo\undefined \gdef\putwordInfo{Info}\fi
		99	\ifx\putwordMethodon\undefined \gdef\putwordMethodon{Method on}\fi
		100	\ifx\putwordon\undefined \gdef\putwordon{on}\fi
		101	\ifx\putwordpage\undefined \gdef\putwordpage{page}\fi
		102	\ifx\putwordsection\undefined \gdef\putwordsection{section}\fi
		103	\ifx\putwordSection\undefined \gdef\putwordSection{Section}\fi
		104	\ifx\putwordsee\undefined \gdef\putwordsee{see}\fi
		105	\ifx\putwordSee\undefined \gdef\putwordSee{See}\fi
		106	\ifx\putwordShortContents\undefined \gdef\putwordShortContents{Short Contents}\fi
		107	\ifx\putwordTableofContents\undefined\gdef\putwordTableofContents{Table of Contents}\fi
		108
		109	% Ignore a token.
		110	%
		111	\def\gobble#1{}
		112
		113	\hyphenation{ap-pen-dix}
		114	\hyphenation{mini-buf-fer mini-buf-fers}
		115	\hyphenation{eshell}
		116	\hyphenation{white-space}
		117
		118	% Margin to add to right of even pages, to left of odd pages.
		119	\newdimen \bindingoffset
		120	\newdimen \normaloffset
		121	\newdimen\pagewidth \newdimen\pageheight
		122
		123	% Sometimes it is convenient to have everything in the transcript file
		124	% and nothing on the terminal. We don't just call \tracingall here,
		125	% since that produces some useless output on the terminal.
		126	%
		127	\def\gloggingall{\begingroup \globaldefs = 1 \loggingall \endgroup}%
		128	\ifx\eTeXversion\undefined
		129	\def\loggingall{\tracingcommands2 \tracingstats2
		130	\tracingpages1 \tracingoutput1 \tracinglostchars1
		131	\tracingmacros2 \tracingparagraphs1 \tracingrestores1
		132	\showboxbreadth\maxdimen\showboxdepth\maxdimen
		133	}%
		134	\else
		135	\def\loggingall{\tracingcommands3 \tracingstats2
		136	\tracingpages1 \tracingoutput1 \tracinglostchars1
		137	\tracingmacros2 \tracingparagraphs1 \tracingrestores1
		138	\tracingscantokens1 \tracingassigns1 \tracingifs1
		139	\tracinggroups1 \tracingnesting2
		140	\showboxbreadth\maxdimen\showboxdepth\maxdimen
		141	}%
		142	\fi
		143
		144	% For @cropmarks command.
		145	% Do @cropmarks to get crop marks.
		146	%
		147	\newif\ifcropmarks
		148	\let\cropmarks = \cropmarkstrue
		149	%
		150	% Dimensions to add cropmarks at corners.
		151	% Added by P. A. MacKay, 12 Nov. 1986
		152	%
		153	\newdimen\outerhsize \newdimen\outervsize % set by the paper size routines
		154	\newdimen\cornerlong \cornerlong=1pc
		155	\newdimen\cornerthick \cornerthick=.3pt
		156	\newdimen\topandbottommargin \topandbottommargin=.75in
		157
		158	% Main output routine.
		159	\chardef\PAGE = 255
		160	\output = {\onepageout{\pagecontents\PAGE}}
		161
		162	\newbox\headlinebox
		163	\newbox\footlinebox
		164
		165	% \onepageout takes a vbox as an argument. Note that \pagecontents
		166	% does insertions, but you have to call it yourself.
		167	\def\onepageout#1{%
		168	\ifcropmarks \hoffset=0pt \else \hoffset=\normaloffset \fi
		169	%
		170	\ifodd\pageno \advance\hoffset by \bindingoffset
		171	\else \advance\hoffset by -\bindingoffset\fi
		172	%
		173	% Do this outside of the \shipout so @code etc. will be expanded in
		174	% the headline as they should be, not taken literally (outputting ''code).
		175	\setbox\headlinebox = \vbox{\let\hsize=\pagewidth \makeheadline}%
		176	\setbox\footlinebox = \vbox{\let\hsize=\pagewidth \makefootline}%
		177	%
		178	{%
		179	% Have to do this stuff outside the \shipout because we want it to
		180	% take effect in \write's, yet the group defined by the \vbox ends
		181	% before the \shipout runs.
		182	%
		183	\escapechar = `\\ % use backslash in output files.
		184	\indexdummies % don't expand commands in the output.
		185	\normalturnoffactive % \ in index entries must not stay \, e.g., if
		186	% the page break happens to be in the middle of an example.
		187	\shipout\vbox{%
		188	\ifcropmarks \vbox to \outervsize\bgroup
		189	\hsize = \outerhsize
		190	\vskip-\topandbottommargin
		191	\vtop to0pt{%
		192	\line{\ewtop\hfil\ewtop}%
		193	\nointerlineskip
		194	\line{%
		195	\vbox{\moveleft\cornerthick\nstop}%
		196	\hfill
		197	\vbox{\moveright\cornerthick\nstop}%
		198	}%
		199	\vss}%
		200	\vskip\topandbottommargin
		201	\line\bgroup
		202	\hfil % center the page within the outer (page) hsize.
		203	\ifodd\pageno\hskip\bindingoffset\fi
		204	\vbox\bgroup
		205	\fi
		206	%
		207	\unvbox\headlinebox
		208	\pagebody{#1}%
		209	\ifdim\ht\footlinebox > 0pt
		210	% Only leave this space if the footline is nonempty.
		211	% (We lessened \vsize for it in \oddfootingxxx.)
		212	% The \baselineskip=24pt in plain's \makefootline has no effect.
		213	\vskip 2\baselineskip
		214	\unvbox\footlinebox
		215	\fi
		216	%
		217	\ifcropmarks
		218	\egroup % end of \vbox\bgroup
		219	\hfil\egroup % end of (centering) \line\bgroup
		220	\vskip\topandbottommargin plus1fill minus1fill
		221	\boxmaxdepth = \cornerthick
		222	\vbox to0pt{\vss
		223	\line{%
		224	\vbox{\moveleft\cornerthick\nsbot}%
		225	\hfill
		226	\vbox{\moveright\cornerthick\nsbot}%
		227	}%
		228	\nointerlineskip
		229	\line{\ewbot\hfil\ewbot}%
		230	}%
		231	\egroup % \vbox from first cropmarks clause
		232	\fi
		233	}% end of \shipout\vbox
		234	}% end of group with \turnoffactive
		235	\advancepageno
		236	\ifnum\outputpenalty>-20000 \else\dosupereject\fi
		237	}
		238
		239	\newinsert\margin \dimen\margin=\maxdimen
		240
		241	\def\pagebody#1{\vbox to\pageheight{\boxmaxdepth=\maxdepth #1}}
		242	{\catcode`\@ =11
		243	\gdef\pagecontents#1{\ifvoid\topins\else\unvbox\topins\fi
		244	% marginal hacks, juha@viisa.uucp (Juha Takala)
		245	\ifvoid\margin\else % marginal info is present
		246	\rlap{\kern\hsize\vbox to\z@{\kern1pt\box\margin \vss}}\fi
		247	\dimen@=\dp#1 \unvbox#1
		248	\ifvoid\footins\else\vskip\skip\footins\footnoterule \unvbox\footins\fi
		249	\ifr@ggedbottom \kern-\dimen@ \vfil \fi}
		250	}
		251
		252	% Here are the rules for the cropmarks. Note that they are
		253	% offset so that the space between them is truly \outerhsize or \outervsize
		254	% (P. A. MacKay, 12 November, 1986)
		255	%
		256	\def\ewtop{\vrule height\cornerthick depth0pt width\cornerlong}
		257	\def\nstop{\vbox
		258	{\hrule height\cornerthick depth\cornerlong width\cornerthick}}
		259	\def\ewbot{\vrule height0pt depth\cornerthick width\cornerlong}
		260	\def\nsbot{\vbox
		261	{\hrule height\cornerlong depth\cornerthick width\cornerthick}}
		262
		263	% Parse an argument, then pass it to #1. The argument is the rest of
		264	% the input line (except we remove a trailing comment). #1 should be a
		265	% macro which expects an ordinary undelimited TeX argument.
		266	%
		267	\def\parsearg#1{%
		268	\let\next = #1%
		269	\begingroup
		270	\obeylines
		271	\futurelet\temp\parseargx
		272	}
		273
		274	% If the next token is an obeyed space (from an @example environment or
		275	% the like), remove it and recurse. Otherwise, we're done.
		276	\def\parseargx{%
		277	% \obeyedspace is defined far below, after the definition of \sepspaces.
		278	\ifx\obeyedspace\temp
		279	\expandafter\parseargdiscardspace
		280	\else
		281	\expandafter\parseargline
		282	\fi
		283	}
		284
		285	% Remove a single space (as the delimiter token to the macro call).
		286	{\obeyspaces %
		287	\gdef\parseargdiscardspace {\futurelet\temp\parseargx}}
		288
		289	{\obeylines %
		290	\gdef\parseargline#1^^M{%
		291	\endgroup % End of the group started in \parsearg.
		292	%
		293	% First remove any @c comment, then any @comment.
		294	% Result of each macro is put in \toks0.
		295	\argremovec #1\c\relax %
		296	\expandafter\argremovecomment \the\toks0 \comment\relax %
		297	%
		298	% Call the caller's macro, saved as \next in \parsearg.
		299	\expandafter\next\expandafter{\the\toks0}%
		300	}%
		301	}
		302
		303	% Since all \c{,omment} does is throw away the argument, we can let TeX
		304	% do that for us. The \relax here is matched by the \relax in the call
		305	% in \parseargline; it could be more or less anything, its purpose is
		306	% just to delimit the argument to the \c.
		307	\def\argremovec#1\c#2\relax{\toks0 = {#1}}
		308	\def\argremovecomment#1\comment#2\relax{\toks0 = {#1}}
		309
		310	% \argremovec{,omment} might leave us with trailing spaces, though; e.g.,
		311	% @end itemize @c foo
		312	% will have two active spaces as part of the argument with the
		313	% `itemize'. Here we remove all active spaces from #1, and assign the
		314	% result to \toks0.
		315	%
		316	% This loses if there are any other active characters besides spaces
		317	% in the argument -- _ ^ +, for example -- since they get expanded.
		318	% Fortunately, Texinfo does not define any such commands. (If it ever
		319	% does, the catcode of the characters in questionwill have to be changed
		320	% here.) But this means we cannot call \removeactivespaces as part of
		321	% \argremovec{,omment}, since @c uses \parsearg, and thus the argument
		322	% that \parsearg gets might well have any character at all in it.
		323	%
		324	\def\removeactivespaces#1{%
		325	\begingroup
		326	\ignoreactivespaces
		327	\edef\temp{#1}%
		328	\global\toks0 = \expandafter{\temp}%
		329	\endgroup
		330	}
		331
		332	% Change the active space to expand to nothing.
		333	%
		334	\begingroup
		335	\obeyspaces
		336	\gdef\ignoreactivespaces{\obeyspaces\let =\empty}
		337	\endgroup
		338
		339
		340	\def\flushcr{\ifx\par\lisppar \def\next##1{}\else \let\next=\relax \fi \next}
		341
		342	%% These are used to keep @begin/@end levels from running away
		343	%% Call \inENV within environments (after a \begingroup)
		344	\newif\ifENV \ENVfalse \def\inENV{\ifENV\relax\else\ENVtrue\fi}
		345	\def\ENVcheck{%
		346	\ifENV\errmessage{Still within an environment; press RETURN to continue}
		347	\endgroup\fi} % This is not perfect, but it should reduce lossage
		348
		349	% @begin foo is the same as @foo, for now.
		350	\newhelp\EMsimple{Press RETURN to continue.}
		351
		352	\outer\def\begin{\parsearg\beginxxx}
		353
		354	\def\beginxxx #1{%
		355	\expandafter\ifx\csname #1\endcsname\relax
		356	{\errhelp=\EMsimple \errmessage{Undefined command @begin #1}}\else
		357	\csname #1\endcsname\fi}
		358
		359	% @end foo executes the definition of \Efoo.
		360	%
		361	\def\end{\parsearg\endxxx}
		362	\def\endxxx #1{%
		363	\removeactivespaces{#1}%
		364	\edef\endthing{\the\toks0}%
		365	%
		366	\expandafter\ifx\csname E\endthing\endcsname\relax
		367	\expandafter\ifx\csname \endthing\endcsname\relax
		368	% There's no \foo, i.e., no ``environment'' foo.
		369	\errhelp = \EMsimple
		370	\errmessage{Undefined command `@end \endthing'}%
		371	\else
		372	\unmatchedenderror\endthing
		373	\fi
		374	\else
		375	% Everything's ok; the right environment has been started.
		376	\csname E\endthing\endcsname
		377	\fi
		378	}
		379
		380	% There is an environment #1, but it hasn't been started. Give an error.
		381	%
		382	\def\unmatchedenderror#1{%
		383	\errhelp = \EMsimple
		384	\errmessage{This `@end #1' doesn't have a matching `@#1'}%
		385	}
		386
		387	% Define the control sequence \E#1 to give an unmatched @end error.
		388	%
		389	\def\defineunmatchedend#1{%
		390	\expandafter\def\csname E#1\endcsname{\unmatchedenderror{#1}}%
		391	}
		392
		393
		394	% Single-spacing is done by various environments (specifically, in
		395	% \nonfillstart and \quotations).
		396	\newskip\singlespaceskip \singlespaceskip = 12.5pt
		397	\def\singlespace{%
		398	% Why was this kern here? It messes up equalizing space above and below
		399	% environments. --karl, 6may93
		400	%{\advance \baselineskip by -\singlespaceskip
		401	%\kern \baselineskip}%
		402	\setleading \singlespaceskip
		403	}
		404
		405	%% Simple single-character @ commands
		406
		407	% @@ prints an @
		408	% Kludge this until the fonts are right (grr).
		409	\def\@{{\tt\char64}}
		410
		411	% This is turned off because it was never documented
		412	% and you can use @w{...} around a quote to suppress ligatures.
		413	%% Define @` and @' to be the same as ` and '
		414	%% but suppressing ligatures.
		415	%\def\`{{`}}
		416	%\def\'{{'}}
		417
		418	% Used to generate quoted braces.
		419	\def\mylbrace {{\tt\char123}}
		420	\def\myrbrace {{\tt\char125}}
		421	\let\{=\mylbrace
		422	\let\}=\myrbrace
		423	\begingroup
		424	% Definitions to produce actual \{ & \} command in an index.
		425	\catcode`\{ = 12 \catcode`\} = 12
		426	\catcode`\[ = 1 \catcode`\] = 2
		427	\catcode`\@ = 0 \catcode`\\ = 12
		428	@gdef@lbracecmd[\{]%
		429	@gdef@rbracecmd[\}]%
		430	@endgroup
		431
		432	% Accents: @, @dotaccent @ringaccent @ubaraccent @udotaccent
		433	% Others are defined by plain TeX: @` @' @" @^ @~ @= @v @H.
		434	\let\, = \c
		435	\let\dotaccent = \.
		436	\def\ringaccent#1{{\accent23 #1}}
		437	\let\tieaccent = \t
		438	\let\ubaraccent = \b
		439	\let\udotaccent = \d
		440
		441	% Other special characters: @questiondown @exclamdown
		442	% Plain TeX defines: @AA @AE @O @OE @L (and lowercase versions) @ss.
		443	\def\questiondown{?`}
		444	\def\exclamdown{!`}
		445
		446	% Dotless i and dotless j, used for accents.
		447	\def\imacro{i}
		448	\def\jmacro{j}
		449	\def\dotless#1{%
		450	\def\temp{#1}%
		451	\ifx\temp\imacro \ptexi
		452	\else\ifx\temp\jmacro \j
		453	\else \errmessage{@dotless can be used only with i or j}%
		454	\fi\fi
		455	}
		456
		457	% Be sure we're in horizontal mode when doing a tie, since we make space
		458	% equivalent to this in @example-like environments. Otherwise, a space
		459	% at the beginning of a line will start with \penalty -- and
		460	% since \penalty is valid in vertical mode, we'd end up putting the
		461	% penalty on the vertical list instead of in the new paragraph.
		462	{\catcode`@ = 11
		463	% Avoid using \@M directly, because that causes trouble
		464	% if the definition is written into an index file.
		465	\global\let\tiepenalty = \@M
		466	\gdef\tie{\leavevmode\penalty\tiepenalty\ }
		467	}
		468
		469	% @: forces normal size whitespace following.
		470	\def\:{\spacefactor=1000 }
		471
		472	% @* forces a line break.
		473	\def\*{\hfil\break\hbox{}\ignorespaces}
		474
		475	% @. is an end-of-sentence period.
		476	\def\.{.\spacefactor=3000 }
		477
		478	% @! is an end-of-sentence bang.
		479	\def\!{!\spacefactor=3000 }
		480
		481	% @? is an end-of-sentence query.
		482	\def\?{?\spacefactor=3000 }
		483
		484	% @w prevents a word break. Without the \leavevmode, @w at the
		485	% beginning of a paragraph, when TeX is still in vertical mode, would
		486	% produce a whole line of output instead of starting the paragraph.
		487	\def\w#1{\leavevmode\hbox{#1}}
		488
		489	% @group ... @end group forces ... to be all on one page, by enclosing
		490	% it in a TeX vbox. We use \vtop instead of \vbox to construct the box
		491	% to keep its height that of a normal line. According to the rules for
		492	% \topskip (p.114 of the TeXbook), the glue inserted is
		493	% max (\topskip - \ht (first item), 0). If that height is large,
		494	% therefore, no glue is inserted, and the space between the headline and
		495	% the text is small, which looks bad.
		496	%
		497	\def\group{\begingroup
		498	\ifnum\catcode13=\active \else
		499	\errhelp = \groupinvalidhelp
		500	\errmessage{@group invalid in context where filling is enabled}%
		501	\fi
		502	%
		503	% The \vtop we start below produces a box with normal height and large
		504	% depth; thus, TeX puts \baselineskip glue before it, and (when the
		505	% next line of text is done) \lineskip glue after it. (See p.82 of
		506	% the TeXbook.) Thus, space below is not quite equal to space
		507	% above. But it's pretty close.
		508	\def\Egroup{%
		509	\egroup % End the \vtop.
		510	\endgroup % End the \group.
		511	}%
		512	%
		513	\vtop\bgroup
		514	% We have to put a strut on the last line in case the @group is in
		515	% the midst of an example, rather than completely enclosing it.
		516	% Otherwise, the interline space between the last line of the group
		517	% and the first line afterwards is too small. But we can't put the
		518	% strut in \Egroup, since there it would be on a line by itself.
		519	% Hence this just inserts a strut at the beginning of each line.
		520	\everypar = {\strut}%
		521	%
		522	% Since we have a strut on every line, we don't need any of TeX's
		523	% normal interline spacing.
		524	\offinterlineskip
		525	%
		526	% OK, but now we have to do something about blank
		527	% lines in the input in @example-like environments, which normally
		528	% just turn into \lisppar, which will insert no space now that we've
		529	% turned off the interline space. Simplest is to make them be an
		530	% empty paragraph.
		531	\ifx\par\lisppar
		532	\edef\par{\leavevmode \par}%
		533	%
		534	% Reset ^^M's definition to new definition of \par.
		535	\obeylines
		536	\fi
		537	%
		538	% Do @comment since we are called inside an environment such as
		539	% @example, where each end-of-line in the input causes an
		540	% end-of-line in the output. We don't want the end-of-line after
		541	% the `@group' to put extra space in the output. Since @group
		542	% should appear on a line by itself (according to the Texinfo
		543	% manual), we don't worry about eating any user text.
		544	\comment
		545	}
		546	%
		547	% TeX puts in an \escapechar (i.e., `@') at the beginning of the help
		548	% message, so this ends up printing `@group can only ...'.
		549	%
		550	\newhelp\groupinvalidhelp{%
		551	group can only be used in environments such as @example,^^J%
		552	where each line of input produces a line of output.}
		553
		554	% @need space-in-mils
		555	% forces a page break if there is not space-in-mils remaining.
		556
		557	\newdimen\mil \mil=0.001in
		558
		559	\def\need{\parsearg\needx}
		560
		561	% Old definition--didn't work.
		562	%\def\needx #1{\par %
		563	%% This method tries to make TeX break the page naturally
		564	%% if the depth of the box does not fit.
		565	%{\baselineskip=0pt%
		566	%\vtop to #1\mil{\vfil}\kern -#1\mil\nobreak
		567	%\prevdepth=-1000pt
		568	%}}
		569
		570	\def\needx#1{%
		571	% Go into vertical mode, so we don't make a big box in the middle of a
		572	% paragraph.
		573	\par
		574	%
		575	% Don't add any leading before our big empty box, but allow a page
		576	% break, since the best break might be right here.
		577	\allowbreak
		578	\nointerlineskip
		579	\vtop to #1\mil{\vfil}%
		580	%
		581	% TeX does not even consider page breaks if a penalty added to the
		582	% main vertical list is 10000 or more. But in order to see if the
		583	% empty box we just added fits on the page, we must make it consider
		584	% page breaks. On the other hand, we don't want to actually break the
		585	% page after the empty box. So we use a penalty of 9999.
		586	%
		587	% There is an extremely small chance that TeX will actually break the
		588	% page at this \penalty, if there are no other feasible breakpoints in
		589	% sight. (If the user is using lots of big @group commands, which
		590	% almost-but-not-quite fill up a page, TeX will have a hard time doing
		591	% good page breaking, for example.) However, I could not construct an
		592	% example where a page broke at this \penalty; if it happens in a real
		593	% document, then we can reconsider our strategy.
		594	\penalty9999
		595	%
		596	% Back up by the size of the box, whether we did a page break or not.
		597	\kern -#1\mil
		598	%
		599	% Do not allow a page break right after this kern.
		600	\nobreak
		601	}
		602
		603	% @br forces paragraph break
		604
		605	\let\br = \par
		606
		607	% @dots{} output an ellipsis using the current font.
		608	% We do .5em per period so that it has the same spacing in a typewriter
		609	% font as three actual period characters.
		610	%
		611	\def\dots{%
		612	\leavevmode
		613	\hbox to 1.5em{%
		614	\hskip 0pt plus 0.25fil minus 0.25fil
		615	.\hss.\hss.%
		616	\hskip 0pt plus 0.5fil minus 0.5fil
		617	}%
		618	}
		619
		620	% @enddots{} is an end-of-sentence ellipsis.
		621	%
		622	\def\enddots{%
		623	\leavevmode
		624	\hbox to 2em{%
		625	\hskip 0pt plus 0.25fil minus 0.25fil
		626	.\hss.\hss.\hss.%
		627	\hskip 0pt plus 0.5fil minus 0.5fil
		628	}%
		629	\spacefactor=3000
		630	}
		631
		632
		633	% @page forces the start of a new page
		634	%
		635	\def\page{\par\vfill\supereject}
		636
		637	% @exdent text....
		638	% outputs text on separate line in roman font, starting at standard page margin
		639
		640	% This records the amount of indent in the innermost environment.
		641	% That's how much \exdent should take out.
		642	\newskip\exdentamount
		643
		644	% This defn is used inside fill environments such as @defun.
		645	\def\exdent{\parsearg\exdentyyy}
		646	\def\exdentyyy #1{{\hfil\break\hbox{\kern -\exdentamount{\rm#1}}\hfil\break}}
		647
		648	% This defn is used inside nofill environments such as @example.
		649	\def\nofillexdent{\parsearg\nofillexdentyyy}
		650	\def\nofillexdentyyy #1{{\advance \leftskip by -\exdentamount
		651	\leftline{\hskip\leftskip{\rm#1}}}}
		652
		653	% @inmargin{TEXT} puts TEXT in the margin next to the current paragraph.
		654
		655	\def\inmargin#1{%
		656	\strut\vadjust{\nobreak\kern-\strutdepth
		657	\vtop to \strutdepth{\baselineskip\strutdepth\vss
		658	\llap{\rightskip=\inmarginspacing \vbox{\noindent #1}}\null}}}
		659	\newskip\inmarginspacing \inmarginspacing=1cm
		660	\def\strutdepth{\dp\strutbox}
		661
		662	%\hbox{{\rm#1}}\hfil\break}}
		663
		664	% @include file insert text of that file as input.
		665	% Allow normal characters that we make active in the argument (a file name).
		666	\def\include{\begingroup
		667	\catcode`\\=12
		668	\catcode`~=12
		669	\catcode`^=12
		670	\catcode`_=12
		671	\catcode`\|=12
		672	\catcode`<=12
		673	\catcode`>=12
		674	\catcode`+=12
		675	\parsearg\includezzz}
		676	% Restore active chars for included file.
		677	\def\includezzz#1{\endgroup\begingroup
		678	% Read the included file in a group so nested @include's work.
		679	\def\thisfile{#1}%
		680	\input\thisfile
		681	\endgroup}
		682
		683	\def\thisfile{}
		684
		685	% @center line outputs that line, centered
		686
		687	\def\center{\parsearg\centerzzz}
		688	\def\centerzzz #1{{\advance\hsize by -\leftskip
		689	\advance\hsize by -\rightskip
		690	\centerline{#1}}}
		691
		692	% @sp n outputs n lines of vertical space
		693
		694	\def\sp{\parsearg\spxxx}
		695	\def\spxxx #1{\vskip #1\baselineskip}
		696
		697	% @comment ...line which is ignored...
		698	% @c is the same as @comment
		699	% @ignore ... @end ignore is another way to write a comment
		700
		701	\def\comment{\begingroup \catcode`\^^M=\other%
		702	\catcode`\@=\other \catcode`\{=\other \catcode`\}=\other%
		703	\commentxxx}
		704	{\catcode`\^^M=\other \gdef\commentxxx#1^^M{\endgroup}}
		705
		706	\let\c=\comment
		707
		708	% @paragraphindent is defined for the Info formatting commands only.
		709	\let\paragraphindent=\comment
		710
		711	% Prevent errors for section commands.
		712	% Used in @ignore and in failing conditionals.
		713	\def\ignoresections{%
		714	\let\chapter=\relax
		715	\let\unnumbered=\relax
		716	\let\top=\relax
		717	\let\unnumberedsec=\relax
		718	\let\unnumberedsection=\relax
		719	\let\unnumberedsubsec=\relax
		720	\let\unnumberedsubsection=\relax
		721	\let\unnumberedsubsubsec=\relax
		722	\let\unnumberedsubsubsection=\relax
		723	\let\section=\relax
		724	\let\subsec=\relax
		725	\let\subsubsec=\relax
		726	\let\subsection=\relax
		727	\let\subsubsection=\relax
		728	\let\appendix=\relax
		729	\let\appendixsec=\relax
		730	\let\appendixsection=\relax
		731	\let\appendixsubsec=\relax
		732	\let\appendixsubsection=\relax
		733	\let\appendixsubsubsec=\relax
		734	\let\appendixsubsubsection=\relax
		735	\let\contents=\relax
		736	\let\smallbook=\relax
		737	\let\titlepage=\relax
		738	}
		739
		740	% Used in nested conditionals, where we have to parse the Texinfo source
		741	% and so want to turn off most commands, in case they are used
		742	% incorrectly.
		743	%
		744	\def\ignoremorecommands{%
		745	\let\defcodeindex = \relax
		746	\let\defcv = \relax
		747	\let\deffn = \relax
		748	\let\deffnx = \relax
		749	\let\defindex = \relax
		750	\let\defivar = \relax
		751	\let\defmac = \relax
		752	\let\defmethod = \relax
		753	\let\defop = \relax
		754	\let\defopt = \relax
		755	\let\defspec = \relax
		756	\let\deftp = \relax
		757	\let\deftypefn = \relax
		758	\let\deftypefun = \relax
		759	\let\deftypevar = \relax
		760	\let\deftypevr = \relax
		761	\let\defun = \relax
		762	\let\defvar = \relax
		763	\let\defvr = \relax
		764	\let\ref = \relax
		765	\let\xref = \relax
		766	\let\printindex = \relax
		767	\let\pxref = \relax
		768	\let\settitle = \relax
		769	\let\setchapternewpage = \relax
		770	\let\setchapterstyle = \relax
		771	\let\everyheading = \relax
		772	\let\evenheading = \relax
		773	\let\oddheading = \relax
		774	\let\everyfooting = \relax
		775	\let\evenfooting = \relax
		776	\let\oddfooting = \relax
		777	\let\headings = \relax
		778	\let\include = \relax
		779	\let\lowersections = \relax
		780	\let\down = \relax
		781	\let\raisesections = \relax
		782	\let\up = \relax
		783	\let\set = \relax
		784	\let\clear = \relax
		785	\let\item = \relax
		786	}
		787
		788	% Ignore @ignore ... @end ignore.
		789	%
		790	\def\ignore{\doignore{ignore}}
		791
		792	% Ignore @ifinfo, @ifhtml, @ifnottex, @html, @menu, and @direntry text.
		793	%
		794	\def\ifinfo{\doignore{ifinfo}}
		795	\def\ifhtml{\doignore{ifhtml}}
		796	\def\ifnottex{\doignore{ifnottex}}
		797	\def\html{\doignore{html}}
		798	\def\menu{\doignore{menu}}
		799	\def\direntry{\doignore{direntry}}
		800
		801	% @dircategory CATEGORY -- specify a category of the dir file
		802	% which this file should belong to. Ignore this in TeX.
		803	\let\dircategory = \comment
		804
		805	% Ignore text until a line `@end #1'.
		806	%
		807	\def\doignore#1{\begingroup
		808	% Don't complain about control sequences we have declared \outer.
		809	\ignoresections
		810	%
		811	% Define a command to swallow text until we reach `@end #1'.
		812	% This @ is a catcode 12 token (that is the normal catcode of @ in
		813	% this texinfo.tex file). We change the catcode of @ below to match.
		814	\long\def\doignoretext##1@end #1{\enddoignore}%
		815	%
		816	% Make sure that spaces turn into tokens that match what \doignoretext wants.
		817	\catcode32 = 10
		818	%
		819	% Ignore braces, too, so mismatched braces don't cause trouble.
		820	\catcode`\{ = 9
		821	\catcode`\} = 9
		822	%
		823	% We must not have @c interpreted as a control sequence.
		824	\catcode`\@ = 12
		825	%
		826	% Make the letter c a comment character so that the rest of the line
		827	% will be ignored. This way, the document can have (for example)
		828	% @c @end ifinfo
		829	% and the @end ifinfo will be properly ignored.
		830	% (We've just changed @ to catcode 12.)
		831	\catcode`\c = 14
		832	%
		833	% And now expand that command.
		834	\doignoretext
		835	}
		836
		837	% What we do to finish off ignored text.
		838	%
		839	\def\enddoignore{\endgroup\ignorespaces}%
		840
		841	\newif\ifwarnedobs\warnedobsfalse
		842	\def\obstexwarn{%
		843	\ifwarnedobs\relax\else
		844	% We need to warn folks that they may have trouble with TeX 3.0.
		845	% This uses \immediate\write16 rather than \message to get newlines.
		846	\immediate\write16{}
		847	\immediate\write16{*WARNING* for users of Unix TeX 3.0!}
		848	\immediate\write16{This manual trips a bug in TeX version 3.0 (tex hangs).}
		849	\immediate\write16{If you are running another version of TeX, relax.}
		850	\immediate\write16{If you are running Unix TeX 3.0, kill this TeX process.}
		851	\immediate\write16{ Then upgrade your TeX installation if you can.}
		852	\immediate\write16{ (See ftp://ftp.gnu.org/pub/gnu/TeX.README.)}
		853	\immediate\write16{If you are stuck with version 3.0, run the}
		854	\immediate\write16{ script ``tex3patch'' from the Texinfo distribution}
		855	\immediate\write16{ to use a workaround.}
		856	\immediate\write16{}
		857	\global\warnedobstrue
		858	\fi
		859	}
		860
		861	% **In TeX 3.0, setting text in \nullfont hangs tex. For a
		862	% workaround (which requires the file ``dummy.tfm'' to be installed),
		863	% uncomment the following line:
		864	%%%%%\font\nullfont=dummy\let\obstexwarn=\relax
		865
		866	% Ignore text, except that we keep track of conditional commands for
		867	% purposes of nesting, up to an `@end #1' command.
		868	%
		869	\def\nestedignore#1{%
		870	\obstexwarn
		871	% We must actually expand the ignored text to look for the @end
		872	% command, so that nested ignore constructs work. Thus, we put the
		873	% text into a \vbox and then do nothing with the result. To minimize
		874	% the change of memory overflow, we follow the approach outlined on
		875	% page 401 of the TeXbook: make the current font be a dummy font.
		876	%
		877	\setbox0 = \vbox\bgroup
		878	% Don't complain about control sequences we have declared \outer.
		879	\ignoresections
		880	%
		881	% Define `@end #1' to end the box, which will in turn undefine the
		882	% @end command again.
		883	\expandafter\def\csname E#1\endcsname{\egroup\ignorespaces}%
		884	%
		885	% We are going to be parsing Texinfo commands. Most cause no
		886	% trouble when they are used incorrectly, but some commands do
		887	% complicated argument parsing or otherwise get confused, so we
		888	% undefine them.
		889	%
		890	% We can't do anything about stray @-signs, unfortunately;
		891	% they'll produce `undefined control sequence' errors.
		892	\ignoremorecommands
		893	%
		894	% Set the current font to be \nullfont, a TeX primitive, and define
		895	% all the font commands to also use \nullfont. We don't use
		896	% dummy.tfm, as suggested in the TeXbook, because not all sites
		897	% might have that installed. Therefore, math mode will still
		898	% produce output, but that should be an extremely small amount of
		899	% stuff compared to the main input.
		900	%
		901	\nullfont
		902	\let\tenrm = \nullfont \let\tenit = \nullfont \let\tensl = \nullfont
		903	\let\tenbf = \nullfont \let\tentt = \nullfont \let\smallcaps = \nullfont
		904	\let\tensf = \nullfont
		905	% Similarly for index fonts (mostly for their use in
		906	% smallexample)
		907	\let\indrm = \nullfont \let\indit = \nullfont \let\indsl = \nullfont
		908	\let\indbf = \nullfont \let\indtt = \nullfont \let\indsc = \nullfont
		909	\let\indsf = \nullfont
		910	%
		911	% Don't complain when characters are missing from the fonts.
		912	\tracinglostchars = 0
		913	%
		914	% Don't bother to do space factor calculations.
		915	\frenchspacing
		916	%
		917	% Don't report underfull hboxes.
		918	\hbadness = 10000
		919	%
		920	% Do minimal line-breaking.
		921	\pretolerance = 10000
		922	%
		923	% Do not execute instructions in @tex
		924	\def\tex{\doignore{tex}}%
		925	% Do not execute macro definitions.
		926	% `c' is a comment character, so the word `macro' will get cut off.
		927	\def\macro{\doignore{ma}}%
		928	}
		929
		930	% @set VAR sets the variable VAR to an empty value.
		931	% @set VAR REST-OF-LINE sets VAR to the value REST-OF-LINE.
		932	%
		933	% Since we want to separate VAR from REST-OF-LINE (which might be
		934	% empty), we can't just use \parsearg; we have to insert a space of our
		935	% own to delimit the rest of the line, and then take it out again if we
		936	% didn't need it. Make sure the catcode of space is correct to avoid
		937	% losing inside @example, for instance.
		938	%
		939	\def\set{\begingroup\catcode` =10
		940	\catcode`\-=12 \catcode`\_=12 % Allow - and _ in VAR.
		941	\parsearg\setxxx}
		942	\def\setxxx#1{\setyyy#1 \endsetyyy}
		943	\def\setyyy#1 #2\endsetyyy{%
		944	\def\temp{#2}%
		945	\ifx\temp\empty \global\expandafter\let\csname SET#1\endcsname = \empty
		946	\else \setzzz{#1}#2\endsetzzz % Remove the trailing space \setxxx inserted.
		947	\fi
		948	\endgroup
		949	}
		950	% Can't use \xdef to pre-expand #2 and save some time, since \temp or
		951	% \next or other control sequences that we've defined might get us into
		952	% an infinite loop. Consider `@set foo @cite{bar}'.
		953	\def\setzzz#1#2 \endsetzzz{\expandafter\gdef\csname SET#1\endcsname{#2}}
		954
		955	% @clear VAR clears (i.e., unsets) the variable VAR.
		956	%
		957	\def\clear{\parsearg\clearxxx}
		958	\def\clearxxx#1{\global\expandafter\let\csname SET#1\endcsname=\relax}
		959
		960	% @value{foo} gets the text saved in variable foo.
		961	%
		962	{
		963	\catcode`\_ = \active
		964	%
		965	% We might end up with active _ or - characters in the argument if
		966	% we're called from @code, as @code{@value{foo-bar_}}. So \let any
		967	% such active characters to their normal equivalents.
		968	\gdef\value{\begingroup
		969	\catcode`\-=12 \catcode`\_=12
		970	\indexbreaks \let_\normalunderscore
		971	\valuexxx}
		972	}
		973	\def\valuexxx#1{\expandablevalue{#1}\endgroup}
		974
		975	% We have this subroutine so that we can handle at least some @value's
		976	% properly in indexes (we \let\value to this in \indexdummies). Ones
		977	% whose names contain - or _ still won't work, but we can't do anything
		978	% about that. The command has to be fully expandable, since the result
		979	% winds up in the index file. This means that if the variable's value
		980	% contains other Texinfo commands, it's almost certain it will fail
		981	% (although perhaps we could fix that with sufficient work to do a
		982	% one-level expansion on the result, instead of complete).
		983	%
		984	\def\expandablevalue#1{%
		985	\expandafter\ifx\csname SET#1\endcsname\relax
		986	{[No value for ``#1'']}%
		987	\else
		988	\csname SET#1\endcsname
		989	\fi
		990	}
		991
		992	% @ifset VAR ... @end ifset reads the `...' iff VAR has been defined
		993	% with @set.
		994	%
		995	\def\ifset{\parsearg\ifsetxxx}
		996	\def\ifsetxxx #1{%
		997	\expandafter\ifx\csname SET#1\endcsname\relax
		998	\expandafter\ifsetfail
		999	\else
		1000	\expandafter\ifsetsucceed
		1001	\fi
		1002	}
		1003	\def\ifsetsucceed{\conditionalsucceed{ifset}}
		1004	\def\ifsetfail{\nestedignore{ifset}}
		1005	\defineunmatchedend{ifset}
		1006
		1007	% @ifclear VAR ... @end ifclear reads the `...' iff VAR has never been
		1008	% defined with @set, or has been undefined with @clear.
		1009	%
		1010	\def\ifclear{\parsearg\ifclearxxx}
		1011	\def\ifclearxxx #1{%
		1012	\expandafter\ifx\csname SET#1\endcsname\relax
		1013	\expandafter\ifclearsucceed
		1014	\else
		1015	\expandafter\ifclearfail
		1016	\fi
		1017	}
		1018	\def\ifclearsucceed{\conditionalsucceed{ifclear}}
		1019	\def\ifclearfail{\nestedignore{ifclear}}
		1020	\defineunmatchedend{ifclear}
		1021
		1022	% @iftex, @ifnothtml, @ifnotinfo always succeed; we read the text
		1023	% following, through the first @end iftex (etc.). Make `@end iftex'
		1024	% (etc.) valid only after an @iftex.
		1025	%
		1026	\def\iftex{\conditionalsucceed{iftex}}
		1027	\def\ifnothtml{\conditionalsucceed{ifnothtml}}
		1028	\def\ifnotinfo{\conditionalsucceed{ifnotinfo}}
		1029	\defineunmatchedend{iftex}
		1030	\defineunmatchedend{ifnothtml}
		1031	\defineunmatchedend{ifnotinfo}
		1032
		1033	% We can't just want to start a group at @iftex (for example) and end it
		1034	% at @end iftex, since then @set commands inside the conditional have no
		1035	% effect (they'd get reverted at the end of the group). So we must
		1036	% define \Eiftex to redefine itself to be its previous value. (We can't
		1037	% just define it to fail again with an ``unmatched end'' error, since
		1038	% the @ifset might be nested.)
		1039	%
		1040	\def\conditionalsucceed#1{%
		1041	\edef\temp{%
		1042	% Remember the current value of \E#1.
		1043	\let\nece{prevE#1} = \nece{E#1}%
		1044	%
		1045	% At the `@end #1', redefine \E#1 to be its previous value.
		1046	\def\nece{E#1}{\let\nece{E#1} = \nece{prevE#1}}%
		1047	}%
		1048	\temp
		1049	}
		1050
		1051	% We need to expand lots of \csname's, but we don't want to expand the
		1052	% control sequences after we've constructed them.
		1053	%
		1054	\def\nece#1{\expandafter\noexpand\csname#1\endcsname}
		1055
		1056	% @asis just yields its argument. Used with @table, for example.
		1057	%
		1058	\def\asis#1{#1}
		1059
		1060	% @math means output in math mode.
		1061	% We don't use $'s directly in the definition of \math because control
		1062	% sequences like \math are expanded when the toc file is written. Then,
		1063	% we read the toc file back, the $'s will be normal characters (as they
		1064	% should be, according to the definition of Texinfo). So we must use a
		1065	% control sequence to switch into and out of math mode.
		1066	%
		1067	% This isn't quite enough for @math to work properly in indices, but it
		1068	% seems unlikely it will ever be needed there.
		1069	%
		1070	\let\implicitmath = $
		1071	\def\math#1{\implicitmath #1\implicitmath}
		1072
		1073	% @bullet and @minus need the same treatment as @math, just above.
		1074	\def\bullet{\implicitmath\ptexbullet\implicitmath}
		1075	\def\minus{\implicitmath-\implicitmath}
		1076
		1077	% @refill is a no-op.
		1078	\let\refill=\relax
		1079
		1080	% If working on a large document in chapters, it is convenient to
		1081	% be able to disable indexing, cross-referencing, and contents, for test runs.
		1082	% This is done with @novalidate (before @setfilename).
		1083	%
		1084	\newif\iflinks \linkstrue % by default we want the aux files.
		1085	\let\novalidate = \linksfalse
		1086
		1087	% @setfilename is done at the beginning of every texinfo file.
		1088	% So open here the files we need to have open while reading the input.
		1089	% This makes it possible to make a .fmt file for texinfo.
		1090	\def\setfilename{%
		1091	\iflinks
		1092	\readauxfile
		1093	\fi % \openindices needs to do some work in any case.
		1094	\openindices
		1095	\fixbackslash % Turn off hack to swallow `\input texinfo'.
		1096	\global\let\setfilename=\comment % Ignore extra @setfilename cmds.
		1097	%
		1098	% If texinfo.cnf is present on the system, read it.
		1099	% Useful for site-wide @afourpaper, etc.
		1100	% Just to be on the safe side, close the input stream before the \input.
		1101	\openin 1 texinfo.cnf
		1102	\ifeof1 \let\temp=\relax \else \def\temp{\input texinfo.cnf }\fi
		1103	\closein1
		1104	\temp
		1105	%
		1106	\comment % Ignore the actual filename.
		1107	}
		1108
		1109	% Called from \setfilename.
		1110	%
		1111	\def\openindices{%
		1112	\newindex{cp}%
		1113	\newcodeindex{fn}%
		1114	\newcodeindex{vr}%
		1115	\newcodeindex{tp}%
		1116	\newcodeindex{ky}%
		1117	\newcodeindex{pg}%
		1118	}
		1119
		1120	% @bye.
		1121	\outer\def\bye{\pagealignmacro\tracingstats=1\ptexend}
		1122
		1123
		1124	\message{fonts,}
		1125	% Font-change commands.
		1126
		1127	% Texinfo sort of supports the sans serif font style, which plain TeX does not.
		1128	% So we set up a \sf analogous to plain's \rm, etc.
		1129	\newfam\sffam
		1130	\def\sf{\fam=\sffam \tensf}
		1131	\let\li = \sf % Sometimes we call it \li, not \sf.
		1132
		1133	% We don't need math for this one.
		1134	\def\ttsl{\tenttsl}
		1135
		1136	% Use Computer Modern fonts at \magstephalf (11pt).
		1137	\newcount\mainmagstep
		1138	\mainmagstep=\magstephalf
		1139
		1140	% Set the font macro #1 to the font named #2, adding on the
		1141	% specified font prefix (normally `cm').
		1142	% #3 is the font's design size, #4 is a scale factor
		1143	\def\setfont#1#2#3#4{\font#1=\fontprefix#2#3 scaled #4}
		1144
		1145	% Use cm as the default font prefix.
		1146	% To specify the font prefix, you must define \fontprefix
		1147	% before you read in texinfo.tex.
		1148	\ifx\fontprefix\undefined
		1149	\def\fontprefix{cm}
		1150	\fi
		1151	% Support font families that don't use the same naming scheme as CM.
		1152	\def\rmshape{r}
		1153	\def\rmbshape{bx} %where the normal face is bold
		1154	\def\bfshape{b}
		1155	\def\bxshape{bx}
		1156	\def\ttshape{tt}
		1157	\def\ttbshape{tt}
		1158	\def\ttslshape{sltt}
		1159	\def\itshape{ti}
		1160	\def\itbshape{bxti}
		1161	\def\slshape{sl}
		1162	\def\slbshape{bxsl}
		1163	\def\sfshape{ss}
		1164	\def\sfbshape{ss}
		1165	\def\scshape{csc}
		1166	\def\scbshape{csc}
		1167
		1168	\ifx\bigger\relax
		1169	\let\mainmagstep=\magstep1
		1170	\setfont\textrm\rmshape{12}{1000}
		1171	\setfont\texttt\ttshape{12}{1000}
		1172	\else
		1173	\setfont\textrm\rmshape{10}{\mainmagstep}
		1174	\setfont\texttt\ttshape{10}{\mainmagstep}
		1175	\fi
		1176	% Instead of cmb10, you many want to use cmbx10.
		1177	% cmbx10 is a prettier font on its own, but cmb10
		1178	% looks better when embedded in a line with cmr10.
		1179	\setfont\textbf\bfshape{10}{\mainmagstep}
		1180	\setfont\textit\itshape{10}{\mainmagstep}
		1181	\setfont\textsl\slshape{10}{\mainmagstep}
		1182	\setfont\textsf\sfshape{10}{\mainmagstep}
		1183	\setfont\textsc\scshape{10}{\mainmagstep}
		1184	\setfont\textttsl\ttslshape{10}{\mainmagstep}
		1185	\font\texti=cmmi10 scaled \mainmagstep
		1186	\font\textsy=cmsy10 scaled \mainmagstep
		1187
		1188	% A few fonts for @defun, etc.
		1189	\setfont\defbf\bxshape{10}{\magstep1} %was 1314
		1190	\setfont\deftt\ttshape{10}{\magstep1}
		1191	\def\df{\let\tentt=\deftt \let\tenbf = \defbf \bf}
		1192
		1193	% Fonts for indices and small examples (9pt).
		1194	% We actually use the slanted font rather than the italic,
		1195	% because texinfo normally uses the slanted fonts for that.
		1196	% Do not make many font distinctions in general in the index, since they
		1197	% aren't very useful.
		1198	\setfont\ninett\ttshape{9}{1000}
		1199	\setfont\ninettsl\ttslshape{10}{900}
		1200	\setfont\indrm\rmshape{9}{1000}
		1201	\setfont\indit\itshape{9}{1000}
		1202	\setfont\indsl\slshape{9}{1000}
		1203	\let\indtt=\ninett
		1204	\let\indttsl=\ninettsl
		1205	\let\indsf=\indrm
		1206	\let\indbf=\indrm
		1207	\setfont\indsc\scshape{10}{900}
		1208	\font\indi=cmmi9
		1209	\font\indsy=cmsy9
		1210
		1211	% Fonts for title page:
		1212	\setfont\titlerm\rmbshape{12}{\magstep3}
		1213	\setfont\titleit\itbshape{10}{\magstep4}
		1214	\setfont\titlesl\slbshape{10}{\magstep4}
		1215	\setfont\titlett\ttbshape{12}{\magstep3}
		1216	\setfont\titlettsl\ttslshape{10}{\magstep4}
		1217	\setfont\titlesf\sfbshape{17}{\magstep1}
		1218	\let\titlebf=\titlerm
		1219	\setfont\titlesc\scbshape{10}{\magstep4}
		1220	\font\titlei=cmmi12 scaled \magstep3
		1221	\font\titlesy=cmsy10 scaled \magstep4
		1222	\def\authorrm{\secrm}
		1223
		1224	% Chapter (and unnumbered) fonts (17.28pt).
		1225	\setfont\chaprm\rmbshape{12}{\magstep2}
		1226	\setfont\chapit\itbshape{10}{\magstep3}
		1227	\setfont\chapsl\slbshape{10}{\magstep3}
		1228	\setfont\chaptt\ttbshape{12}{\magstep2}
		1229	\setfont\chapttsl\ttslshape{10}{\magstep3}
		1230	\setfont\chapsf\sfbshape{17}{1000}
		1231	\let\chapbf=\chaprm
		1232	\setfont\chapsc\scbshape{10}{\magstep3}
		1233	\font\chapi=cmmi12 scaled \magstep2
		1234	\font\chapsy=cmsy10 scaled \magstep3
		1235
		1236	% Section fonts (14.4pt).
		1237	\setfont\secrm\rmbshape{12}{\magstep1}
		1238	\setfont\secit\itbshape{10}{\magstep2}
		1239	\setfont\secsl\slbshape{10}{\magstep2}
		1240	\setfont\sectt\ttbshape{12}{\magstep1}
		1241	\setfont\secttsl\ttslshape{10}{\magstep2}
		1242	\setfont\secsf\sfbshape{12}{\magstep1}
		1243	\let\secbf\secrm
		1244	\setfont\secsc\scbshape{10}{\magstep2}
		1245	\font\seci=cmmi12 scaled \magstep1
		1246	\font\secsy=cmsy10 scaled \magstep2
		1247
		1248	% \setfont\ssecrm\bxshape{10}{\magstep1} % This size an font looked bad.
		1249	% \setfont\ssecit\itshape{10}{\magstep1} % The letters were too crowded.
		1250	% \setfont\ssecsl\slshape{10}{\magstep1}
		1251	% \setfont\ssectt\ttshape{10}{\magstep1}
		1252	% \setfont\ssecsf\sfshape{10}{\magstep1}
		1253
		1254	%\setfont\ssecrm\bfshape{10}{1315} % Note the use of cmb rather than cmbx.
		1255	%\setfont\ssecit\itshape{10}{1315} % Also, the size is a little larger than
		1256	%\setfont\ssecsl\slshape{10}{1315} % being scaled magstep1.
		1257	%\setfont\ssectt\ttshape{10}{1315}
		1258	%\setfont\ssecsf\sfshape{10}{1315}
		1259
		1260	%\let\ssecbf=\ssecrm
		1261
		1262	% Subsection fonts (13.15pt).
		1263	\setfont\ssecrm\rmbshape{12}{\magstephalf}
		1264	\setfont\ssecit\itbshape{10}{1315}
		1265	\setfont\ssecsl\slbshape{10}{1315}
		1266	\setfont\ssectt\ttbshape{12}{\magstephalf}
		1267	\setfont\ssecttsl\ttslshape{10}{1315}
		1268	\setfont\ssecsf\sfbshape{12}{\magstephalf}
		1269	\let\ssecbf\ssecrm
		1270	\setfont\ssecsc\scbshape{10}{\magstep1}
		1271	\font\sseci=cmmi12 scaled \magstephalf
		1272	\font\ssecsy=cmsy10 scaled 1315
		1273	% The smallcaps and symbol fonts should actually be scaled \magstep1.5,
		1274	% but that is not a standard magnification.
		1275
		1276	% In order for the font changes to affect most math symbols and letters,
		1277	% we have to define the \textfont of the standard families. Since
		1278	% texinfo doesn't allow for producing subscripts and superscripts, we
		1279	% don't bother to reset \scriptfont and \scriptscriptfont (which would
		1280	% also require loading a lot more fonts).
		1281	%
		1282	\def\resetmathfonts{%
		1283	\textfont0 = \tenrm \textfont1 = \teni \textfont2 = \tensy
		1284	\textfont\itfam = \tenit \textfont\slfam = \tensl \textfont\bffam = \tenbf
		1285	\textfont\ttfam = \tentt \textfont\sffam = \tensf
		1286	}
		1287
		1288
		1289	% The font-changing commands redefine the meanings of \tenSTYLE, instead
		1290	% of just \STYLE. We do this so that font changes will continue to work
		1291	% in math mode, where it is the current \fam that is relevant in most
		1292	% cases, not the current font. Plain TeX does \def\bf{\fam=\bffam
		1293	% \tenbf}, for example. By redefining \tenbf, we obviate the need to
		1294	% redefine \bf itself.
		1295	\def\textfonts{%
		1296	\let\tenrm=\textrm \let\tenit=\textit \let\tensl=\textsl
		1297	\let\tenbf=\textbf \let\tentt=\texttt \let\smallcaps=\textsc
		1298	\let\tensf=\textsf \let\teni=\texti \let\tensy=\textsy \let\tenttsl=\textttsl
		1299	\resetmathfonts}
		1300	\def\titlefonts{%
		1301	\let\tenrm=\titlerm \let\tenit=\titleit \let\tensl=\titlesl
		1302	\let\tenbf=\titlebf \let\tentt=\titlett \let\smallcaps=\titlesc
		1303	\let\tensf=\titlesf \let\teni=\titlei \let\tensy=\titlesy
		1304	\let\tenttsl=\titlettsl
		1305	\resetmathfonts \setleading{25pt}}
		1306	\def\titlefont#1{{\titlefonts\rm #1}}
		1307	\def\chapfonts{%
		1308	\let\tenrm=\chaprm \let\tenit=\chapit \let\tensl=\chapsl
		1309	\let\tenbf=\chapbf \let\tentt=\chaptt \let\smallcaps=\chapsc
		1310	\let\tensf=\chapsf \let\teni=\chapi \let\tensy=\chapsy \let\tenttsl=\chapttsl
		1311	\resetmathfonts \setleading{19pt}}
		1312	\def\secfonts{%
		1313	\let\tenrm=\secrm \let\tenit=\secit \let\tensl=\secsl
		1314	\let\tenbf=\secbf \let\tentt=\sectt \let\smallcaps=\secsc
		1315	\let\tensf=\secsf \let\teni=\seci \let\tensy=\secsy \let\tenttsl=\secttsl
		1316	\resetmathfonts \setleading{16pt}}
		1317	\def\subsecfonts{%
		1318	\let\tenrm=\ssecrm \let\tenit=\ssecit \let\tensl=\ssecsl
		1319	\let\tenbf=\ssecbf \let\tentt=\ssectt \let\smallcaps=\ssecsc
		1320	\let\tensf=\ssecsf \let\teni=\sseci \let\tensy=\ssecsy \let\tenttsl=\ssecttsl
		1321	\resetmathfonts \setleading{15pt}}
		1322	\let\subsubsecfonts = \subsecfonts % Maybe make sssec fonts scaled magstephalf?
		1323	\def\indexfonts{%
		1324	\let\tenrm=\indrm \let\tenit=\indit \let\tensl=\indsl
		1325	\let\tenbf=\indbf \let\tentt=\indtt \let\smallcaps=\indsc
		1326	\let\tensf=\indsf \let\teni=\indi \let\tensy=\indsy \let\tenttsl=\indttsl
		1327	\resetmathfonts \setleading{12pt}}
		1328
		1329	% Set up the default fonts, so we can use them for creating boxes.
		1330	%
		1331	\textfonts
		1332
		1333	% Define these so they can be easily changed for other fonts.
		1334	\def\angleleft{$\langle$}
		1335	\def\angleright{$\rangle$}
		1336
		1337	% Count depth in font-changes, for error checks
		1338	\newcount\fontdepth \fontdepth=0
		1339
		1340	% Fonts for short table of contents.
		1341	\setfont\shortcontrm\rmshape{12}{1000}
		1342	\setfont\shortcontbf\bxshape{12}{1000}
		1343	\setfont\shortcontsl\slshape{12}{1000}
		1344
		1345	%% Add scribe-like font environments, plus @l for inline lisp (usually sans
		1346	%% serif) and @ii for TeX italic
		1347
		1348	% \smartitalic{ARG} outputs arg in italics, followed by an italic correction
		1349	% unless the following character is such as not to need one.
		1350	\def\smartitalicx{\ifx\next,\else\ifx\next-\else\ifx\next.\else\/\fi\fi\fi}
		1351	\def\smartslanted#1{{\sl #1}\futurelet\next\smartitalicx}
		1352	\def\smartitalic#1{{\it #1}\futurelet\next\smartitalicx}
		1353
		1354	\let\i=\smartitalic
		1355	\let\var=\smartslanted
		1356	\let\dfn=\smartslanted
		1357	\let\emph=\smartitalic
		1358	\let\cite=\smartslanted
		1359
		1360	\def\b#1{{\bf #1}}
		1361	\let\strong=\b
		1362
		1363	% We can't just use \exhyphenpenalty, because that only has effect at
		1364	% the end of a paragraph. Restore normal hyphenation at the end of the
		1365	% group within which \nohyphenation is presumably called.
		1366	%
		1367	\def\nohyphenation{\hyphenchar\font = -1 \aftergroup\restorehyphenation}
		1368	\def\restorehyphenation{\hyphenchar\font = `- }
		1369
		1370	\def\t#1{%
		1371	{\tt \rawbackslash \frenchspacing #1}%
		1372	\null
		1373	}
		1374	\let\ttfont=\t
		1375	\def\samp#1{`\tclose{#1}'\null}
		1376	\setfont\smallrm\rmshape{8}{1000}
		1377	\font\smallsy=cmsy9
		1378	\def\key#1{{\smallrm\textfont2=\smallsy \leavevmode\hbox{%
		1379	\raise0.4pt\hbox{\angleleft}\kern-.08em\vtop{%
		1380	\vbox{\hrule\kern-0.4pt
		1381	\hbox{\raise0.4pt\hbox{\vphantom{\angleleft}}#1}}%
		1382	\kern-0.4pt\hrule}%
		1383	\kern-.06em\raise0.4pt\hbox{\angleright}}}}
		1384	% The old definition, with no lozenge:
		1385	%\def\key #1{{\ttsl \nohyphenation \uppercase{#1}}\null}
		1386	\def\ctrl #1{{\tt \rawbackslash \hat}#1}
		1387
		1388	% @file, @option are the same as @samp.
		1389	\let\file=\samp
		1390	\let\option=\samp
		1391
		1392	% @code is a modification of @t,
		1393	% which makes spaces the same size as normal in the surrounding text.
		1394	\def\tclose#1{%
		1395	{%
		1396	% Change normal interword space to be same as for the current font.
		1397	\spaceskip = \fontdimen2\font
		1398	%
		1399	% Switch to typewriter.
		1400	\tt
		1401	%
		1402	% But `\ ' produces the large typewriter interword space.
		1403	\def\ {{\spaceskip = 0pt{} }}%
		1404	%
		1405	% Turn off hyphenation.
		1406	\nohyphenation
		1407	%
		1408	\rawbackslash
		1409	\frenchspacing
		1410	#1%
		1411	}%
		1412	\null
		1413	}
		1414
		1415	% We must turn on hyphenation at `-' and `_' in \code.
		1416	% Otherwise, it is too hard to avoid overfull hboxes
		1417	% in the Emacs manual, the Library manual, etc.
		1418
		1419	% Unfortunately, TeX uses one parameter (\hyphenchar) to control
		1420	% both hyphenation at - and hyphenation within words.
		1421	% We must therefore turn them both off (\tclose does that)
		1422	% and arrange explicitly to hyphenate at a dash.
		1423	% -- rms.
		1424	{
		1425	\catcode`\-=\active
		1426	\catcode`\_=\active
		1427	%
		1428	\global\def\code{\begingroup
		1429	\catcode`\-=\active \let-\codedash
		1430	\catcode`\_=\active \let_\codeunder
		1431	\codex
		1432	}
		1433	%
		1434	% If we end up with any active - characters when handling the index,
		1435	% just treat them as a normal -.
		1436	\global\def\indexbreaks{\catcode`\-=\active \let-\realdash}
		1437	}
		1438
		1439	\def\realdash{-}
		1440	\def\codedash{-\discretionary{}{}{}}
		1441	\def\codeunder{\ifusingtt{\normalunderscore\discretionary{}{}{}}{\_}}
		1442	\def\codex #1{\tclose{#1}\endgroup}
		1443
		1444	%\let\exp=\tclose %Was temporary
		1445
		1446	% @kbd is like @code, except that if the argument is just one @key command,
		1447	% then @kbd has no effect.
		1448
		1449	% @kbdinputstyle -- arg is `distinct' (@kbd uses slanted tty font always),
		1450	% `example' (@kbd uses ttsl only inside of @example and friends),
		1451	% or `code' (@kbd uses normal tty font always).
		1452	\def\kbdinputstyle{\parsearg\kbdinputstylexxx}
		1453	\def\kbdinputstylexxx#1{%
		1454	\def\arg{#1}%
		1455	\ifx\arg\worddistinct
		1456	\gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\ttsl}%
		1457	\else\ifx\arg\wordexample
		1458	\gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\tt}%
		1459	\else\ifx\arg\wordcode
		1460	\gdef\kbdexamplefont{\tt}\gdef\kbdfont{\tt}%
		1461	\fi\fi\fi
		1462	}
		1463	\def\worddistinct{distinct}
		1464	\def\wordexample{example}
		1465	\def\wordcode{code}
		1466
		1467	% Default is kbdinputdistinct. (Too much of a hassle to call the macro,
		1468	% the catcodes are wrong for parsearg to work.)
		1469	\gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\ttsl}
		1470
		1471	\def\xkey{\key}
		1472	\def\kbdfoo#1#2#3\par{\def\one{#1}\def\three{#3}\def\threex{??}%
		1473	\ifx\one\xkey\ifx\threex\three \key{#2}%
		1474	\else{\tclose{\kbdfont\look}}\fi
		1475	\else{\tclose{\kbdfont\look}}\fi}
		1476
		1477	% For @url, @env, @command quotes seem unnecessary, so use \code.
		1478	\let\url=\code
		1479	\let\env=\code
		1480	\let\command=\code
		1481
		1482	% @uref (abbreviation for `urlref') takes an optional second argument
		1483	% specifying the text to display. First (mandatory) arg is the url.
		1484	% Perhaps eventually put in a hypertex \special here.
		1485	%
		1486	\def\uref#1{\urefxxx #1,,\finish}
		1487	\def\urefxxx#1,#2,#3\finish{%
		1488	\setbox0 = \hbox{\ignorespaces #2}%
		1489	\ifdim\wd0 > 0pt
		1490	\unhbox0\ (\code{#1})%
		1491	\else
		1492	\code{#1}%
		1493	\fi
		1494	}
		1495
		1496	% rms does not like the angle brackets --karl, 17may97.
		1497	% So now @email is just like @uref.
		1498	%\def\email#1{\angleleft{\tt #1}\angleright}
		1499	\let\email=\uref
		1500
		1501	% Check if we are currently using a typewriter font. Since all the
		1502	% Computer Modern typewriter fonts have zero interword stretch (and
		1503	% shrink), and it is reasonable to expect all typewriter fonts to have
		1504	% this property, we can check that font parameter.
		1505	%
		1506	\def\ifmonospace{\ifdim\fontdimen3\font=0pt }
		1507
		1508	% Typeset a dimension, e.g., `in' or `pt'. The only reason for the
		1509	% argument is to make the input look right: @dmn{pt} instead of @dmn{}pt.
		1510	%
		1511	\def\dmn#1{\thinspace #1}
		1512
		1513	\def\kbd#1{\def\look{#1}\expandafter\kbdfoo\look??\par}
		1514
		1515	% @l was never documented to mean ``switch to the Lisp font'',
		1516	% and it is not used as such in any manual I can find. We need it for
		1517	% Polish suppressed-l. --karl, 22sep96.
		1518	%\def\l#1{{\li #1}\null}
		1519
		1520	% Explicit font changes: @r, @sc, undocumented @ii.
		1521	\def\r#1{{\rm #1}} % roman font
		1522	\def\sc#1{{\smallcaps#1}} % smallcaps font
		1523	\def\ii#1{{\it #1}} % italic font
		1524
		1525	% @acronym downcases the argument and prints in smallcaps.
		1526	\def\acronym#1{{\smallcaps \lowercase{#1}}}
		1527
		1528	% @pounds{} is a sterling sign.
		1529	\def\pounds{{\it\$}}
		1530
		1531
		1532	\message{page headings,}
		1533
		1534	\newskip\titlepagetopglue \titlepagetopglue = 1.5in
		1535	\newskip\titlepagebottomglue \titlepagebottomglue = 2pc
		1536
		1537	% First the title page. Must do @settitle before @titlepage.
		1538	\newif\ifseenauthor
		1539	\newif\iffinishedtitlepage
		1540
		1541	% Do an implicit @contents or @shortcontents after @end titlepage if the
		1542	% user says @setcontentsaftertitlepage or @setshortcontentsaftertitlepage.
		1543	%
		1544	\newif\ifsetcontentsaftertitlepage
		1545	\let\setcontentsaftertitlepage = \setcontentsaftertitlepagetrue
		1546	\newif\ifsetshortcontentsaftertitlepage
		1547	\let\setshortcontentsaftertitlepage = \setshortcontentsaftertitlepagetrue
		1548
		1549	\def\shorttitlepage{\parsearg\shorttitlepagezzz}
		1550	\def\shorttitlepagezzz #1{\begingroup\hbox{}\vskip 1.5in \chaprm \centerline{#1}%
		1551	\endgroup\page\hbox{}\page}
		1552
		1553	\def\titlepage{\begingroup \parindent=0pt \textfonts
		1554	\let\subtitlerm=\tenrm
		1555	\def\subtitlefont{\subtitlerm \normalbaselineskip = 13pt \normalbaselines}%
		1556	%
		1557	\def\authorfont{\authorrm \normalbaselineskip = 16pt \normalbaselines}%
		1558	%
		1559	% Leave some space at the very top of the page.
		1560	\vglue\titlepagetopglue
		1561	%
		1562	% Now you can print the title using @title.
		1563	\def\title{\parsearg\titlezzz}%
		1564	\def\titlezzz##1{\leftline{\titlefonts\rm ##1}
		1565	% print a rule at the page bottom also.
		1566	\finishedtitlepagefalse
		1567	\vskip4pt \hrule height 4pt width \hsize \vskip4pt}%
		1568	% No rule at page bottom unless we print one at the top with @title.
		1569	\finishedtitlepagetrue
		1570	%
		1571	% Now you can put text using @subtitle.
		1572	\def\subtitle{\parsearg\subtitlezzz}%
		1573	\def\subtitlezzz##1{{\subtitlefont \rightline{##1}}}%
		1574	%
		1575	% @author should come last, but may come many times.
		1576	\def\author{\parsearg\authorzzz}%
		1577	\def\authorzzz##1{\ifseenauthor\else\vskip 0pt plus 1filll\seenauthortrue\fi
		1578	{\authorfont \leftline{##1}}}%
		1579	%
		1580	% Most title ``pages'' are actually two pages long, with space
		1581	% at the top of the second. We don't want the ragged left on the second.
		1582	\let\oldpage = \page
		1583	\def\page{%
		1584	\iffinishedtitlepage\else
		1585	\finishtitlepage
		1586	\fi
		1587	\oldpage
		1588	\let\page = \oldpage
		1589	\hbox{}}%
		1590	% \def\page{\oldpage \hbox{}}
		1591	}
		1592
		1593	\def\Etitlepage{%
		1594	\iffinishedtitlepage\else
		1595	\finishtitlepage
		1596	\fi
		1597	% It is important to do the page break before ending the group,
		1598	% because the headline and footline are only empty inside the group.
		1599	% If we use the new definition of \page, we always get a blank page
		1600	% after the title page, which we certainly don't want.
		1601	\oldpage
		1602	\endgroup
		1603	%
		1604	% If they want short, they certainly want long too.
		1605	\ifsetshortcontentsaftertitlepage
		1606	\shortcontents
		1607	\contents
		1608	\global\let\shortcontents = \relax
		1609	\global\let\contents = \relax
		1610	\fi
		1611	%
		1612	\ifsetcontentsaftertitlepage
		1613	\contents
		1614	\global\let\contents = \relax
		1615	\global\let\shortcontents = \relax
		1616	\fi
		1617	%
		1618	\HEADINGSon
		1619	}
		1620
		1621	\def\finishtitlepage{%
		1622	\vskip4pt \hrule height 2pt width \hsize
		1623	\vskip\titlepagebottomglue
		1624	\finishedtitlepagetrue
		1625	}
		1626
		1627	%%% Set up page headings and footings.
		1628
		1629	\let\thispage=\folio
		1630
		1631	\newtoks\evenheadline % headline on even pages
		1632	\newtoks\oddheadline % headline on odd pages
		1633	\newtoks\evenfootline % footline on even pages
		1634	\newtoks\oddfootline % footline on odd pages
		1635
		1636	% Now make Tex use those variables
		1637	\headline={{\textfonts\rm \ifodd\pageno \the\oddheadline
		1638	\else \the\evenheadline \fi}}
		1639	\footline={{\textfonts\rm \ifodd\pageno \the\oddfootline
		1640	\else \the\evenfootline \fi}\HEADINGShook}
		1641	\let\HEADINGShook=\relax
		1642
		1643	% Commands to set those variables.
		1644	% For example, this is what @headings on does
		1645	% @evenheading @thistitle\|@thispage\|@thischapter
		1646	% @oddheading @thischapter\|@thispage\|@thistitle
		1647	% @evenfooting @thisfile\|\|
		1648	% @oddfooting \|\|@thisfile
		1649
		1650	\def\evenheading{\parsearg\evenheadingxxx}
		1651	\def\oddheading{\parsearg\oddheadingxxx}
		1652	\def\everyheading{\parsearg\everyheadingxxx}
		1653
		1654	\def\evenfooting{\parsearg\evenfootingxxx}
		1655	\def\oddfooting{\parsearg\oddfootingxxx}
		1656	\def\everyfooting{\parsearg\everyfootingxxx}
		1657
		1658	{\catcode`\@=0 %
		1659
		1660	\gdef\evenheadingxxx #1{\evenheadingyyy #1@\|@\|@\|@\|\finish}
		1661	\gdef\evenheadingyyy #1@\|#2@\|#3@\|#4\finish{%
		1662	\global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
		1663
		1664	\gdef\oddheadingxxx #1{\oddheadingyyy #1@\|@\|@\|@\|\finish}
		1665	\gdef\oddheadingyyy #1@\|#2@\|#3@\|#4\finish{%
		1666	\global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
		1667
		1668	\gdef\everyheadingxxx#1{\oddheadingxxx{#1}\evenheadingxxx{#1}}%
		1669
		1670	\gdef\evenfootingxxx #1{\evenfootingyyy #1@\|@\|@\|@\|\finish}
		1671	\gdef\evenfootingyyy #1@\|#2@\|#3@\|#4\finish{%
		1672	\global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
		1673
		1674	\gdef\oddfootingxxx #1{\oddfootingyyy #1@\|@\|@\|@\|\finish}
		1675	\gdef\oddfootingyyy #1@\|#2@\|#3@\|#4\finish{%
		1676	\global\oddfootline = {\rlap{\centerline{#2}}\line{#1\hfil#3}}%
		1677	%
		1678	% Leave some space for the footline. Hopefully ok to assume
		1679	% @evenfooting will not be used by itself.
		1680	\global\advance\pageheight by -\baselineskip
		1681	\global\advance\vsize by -\baselineskip
		1682	}
		1683
		1684	\gdef\everyfootingxxx#1{\oddfootingxxx{#1}\evenfootingxxx{#1}}
		1685	%
		1686	}% unbind the catcode of @.
		1687
		1688	% @headings double turns headings on for double-sided printing.
		1689	% @headings single turns headings on for single-sided printing.
		1690	% @headings off turns them off.
		1691	% @headings on same as @headings double, retained for compatibility.
		1692	% @headings after turns on double-sided headings after this page.
		1693	% @headings doubleafter turns on double-sided headings after this page.
		1694	% @headings singleafter turns on single-sided headings after this page.
		1695	% By default, they are off at the start of a document,
		1696	% and turned `on' after @end titlepage.
		1697
		1698	\def\headings #1 {\csname HEADINGS#1\endcsname}
		1699
		1700	\def\HEADINGSoff{
		1701	\global\evenheadline={\hfil} \global\evenfootline={\hfil}
		1702	\global\oddheadline={\hfil} \global\oddfootline={\hfil}}
		1703	\HEADINGSoff
		1704	% When we turn headings on, set the page number to 1.
		1705	% For double-sided printing, put current file name in lower left corner,
		1706	% chapter name on inside top of right hand pages, document
		1707	% title on inside top of left hand pages, and page numbers on outside top
		1708	% edge of all pages.
		1709	\def\HEADINGSdouble{
		1710	\global\pageno=1
		1711	\global\evenfootline={\hfil}
		1712	\global\oddfootline={\hfil}
		1713	\global\evenheadline={\line{\folio\hfil\thistitle}}
		1714	\global\oddheadline={\line{\thischapter\hfil\folio}}
		1715	\global\let\contentsalignmacro = \chapoddpage
		1716	}
		1717	\let\contentsalignmacro = \chappager
		1718
		1719	% For single-sided printing, chapter title goes across top left of page,
		1720	% page number on top right.
		1721	\def\HEADINGSsingle{
		1722	\global\pageno=1
		1723	\global\evenfootline={\hfil}
		1724	\global\oddfootline={\hfil}
		1725	\global\evenheadline={\line{\thischapter\hfil\folio}}
		1726	\global\oddheadline={\line{\thischapter\hfil\folio}}
		1727	\global\let\contentsalignmacro = \chappager
		1728	}
		1729	\def\HEADINGSon{\HEADINGSdouble}
		1730
		1731	\def\HEADINGSafter{\let\HEADINGShook=\HEADINGSdoublex}
		1732	\let\HEADINGSdoubleafter=\HEADINGSafter
		1733	\def\HEADINGSdoublex{%
		1734	\global\evenfootline={\hfil}
		1735	\global\oddfootline={\hfil}
		1736	\global\evenheadline={\line{\folio\hfil\thistitle}}
		1737	\global\oddheadline={\line{\thischapter\hfil\folio}}
		1738	\global\let\contentsalignmacro = \chapoddpage
		1739	}
		1740
		1741	\def\HEADINGSsingleafter{\let\HEADINGShook=\HEADINGSsinglex}
		1742	\def\HEADINGSsinglex{%
		1743	\global\evenfootline={\hfil}
		1744	\global\oddfootline={\hfil}
		1745	\global\evenheadline={\line{\thischapter\hfil\folio}}
		1746	\global\oddheadline={\line{\thischapter\hfil\folio}}
		1747	\global\let\contentsalignmacro = \chappager
		1748	}
		1749
		1750	% Subroutines used in generating headings
		1751	% Produces Day Month Year style of output.
		1752	\def\today{\number\day\space
		1753	\ifcase\month\or
		1754	January\or February\or March\or April\or May\or June\or
		1755	July\or August\or September\or October\or November\or December\fi
		1756	\space\number\year}
		1757
		1758	% Use this if you want the Month Day, Year style of output.
		1759	%\def\today{\ifcase\month\or
		1760	%January\or February\or March\or April\or May\or June\or
		1761	%July\or August\or September\or October\or November\or December\fi
		1762	%\space\number\day, \number\year}
		1763
		1764	% @settitle line... specifies the title of the document, for headings
		1765	% It generates no output of its own
		1766
		1767	\def\thistitle{No Title}
		1768	\def\settitle{\parsearg\settitlezzz}
		1769	\def\settitlezzz #1{\gdef\thistitle{#1}}
		1770
		1771
		1772	\message{tables,}
		1773	% Tables -- @table, @ftable, @vtable, @item(x), @kitem(x), @xitem(x).
		1774
		1775	% default indentation of table text
		1776	\newdimen\tableindent \tableindent=.8in
		1777	% default indentation of @itemize and @enumerate text
		1778	\newdimen\itemindent \itemindent=.3in
		1779	% margin between end of table item and start of table text.
		1780	\newdimen\itemmargin \itemmargin=.1in
		1781
		1782	% used internally for \itemindent minus \itemmargin
		1783	\newdimen\itemmax
		1784
		1785	% Note @table, @vtable, and @vtable define @item, @itemx, etc., with
		1786	% these defs.
		1787	% They also define \itemindex
		1788	% to index the item name in whatever manner is desired (perhaps none).
		1789
		1790	\newif\ifitemxneedsnegativevskip
		1791
		1792	\def\itemxpar{\par\ifitemxneedsnegativevskip\nobreak\vskip-\parskip\nobreak\fi}
		1793
		1794	\def\internalBitem{\smallbreak \parsearg\itemzzz}
		1795	\def\internalBitemx{\itemxpar \parsearg\itemzzz}
		1796
		1797	\def\internalBxitem "#1"{\def\xitemsubtopix{#1} \smallbreak \parsearg\xitemzzz}
		1798	\def\internalBxitemx "#1"{\def\xitemsubtopix{#1} \itemxpar \parsearg\xitemzzz}
		1799
		1800	\def\internalBkitem{\smallbreak \parsearg\kitemzzz}
		1801	\def\internalBkitemx{\itemxpar \parsearg\kitemzzz}
		1802
		1803	\def\kitemzzz #1{\dosubind {kw}{\code{#1}}{for {\bf \lastfunction}}%
		1804	\itemzzz {#1}}
		1805
		1806	\def\xitemzzz #1{\dosubind {kw}{\code{#1}}{for {\bf \xitemsubtopic}}%
		1807	\itemzzz {#1}}
		1808
		1809	\def\itemzzz #1{\begingroup %
		1810	\advance\hsize by -\rightskip
		1811	\advance\hsize by -\tableindent
		1812	\setbox0=\hbox{\itemfont{#1}}%
		1813	\itemindex{#1}%
		1814	\nobreak % This prevents a break before @itemx.
		1815	%
		1816	% If the item text does not fit in the space we have, put it on a line
		1817	% by itself, and do not allow a page break either before or after that
		1818	% line. We do not start a paragraph here because then if the next
		1819	% command is, e.g., @kindex, the whatsit would get put into the
		1820	% horizontal list on a line by itself, resulting in extra blank space.
		1821	\ifdim \wd0>\itemmax
		1822	%
		1823	% Make this a paragraph so we get the \parskip glue and wrapping,
		1824	% but leave it ragged-right.
		1825	\begingroup
		1826	\advance\leftskip by-\tableindent
		1827	\advance\hsize by\tableindent
		1828	\advance\rightskip by0pt plus1fil
		1829	\leavevmode\unhbox0\par
		1830	\endgroup
		1831	%
		1832	% We're going to be starting a paragraph, but we don't want the
		1833	% \parskip glue -- logically it's part of the @item we just started.
		1834	\nobreak \vskip-\parskip
		1835	%
		1836	% Stop a page break at the \parskip glue coming up. Unfortunately
		1837	% we can't prevent a possible page break at the following
		1838	% \baselineskip glue.
		1839	\nobreak
		1840	\endgroup
		1841	\itemxneedsnegativevskipfalse
		1842	\else
		1843	% The item text fits into the space. Start a paragraph, so that the
		1844	% following text (if any) will end up on the same line.
		1845	\noindent
		1846	% Do this with kerns and \unhbox so that if there is a footnote in
		1847	% the item text, it can migrate to the main vertical list and
		1848	% eventually be printed.
		1849	\nobreak\kern-\tableindent
		1850	\dimen0 = \itemmax \advance\dimen0 by \itemmargin \advance\dimen0 by -\wd0
		1851	\unhbox0
		1852	\nobreak\kern\dimen0
		1853	\endgroup
		1854	\itemxneedsnegativevskiptrue
		1855	\fi
		1856	}
		1857
		1858	\def\item{\errmessage{@item while not in a table}}
		1859	\def\itemx{\errmessage{@itemx while not in a table}}
		1860	\def\kitem{\errmessage{@kitem while not in a table}}
		1861	\def\kitemx{\errmessage{@kitemx while not in a table}}
		1862	\def\xitem{\errmessage{@xitem while not in a table}}
		1863	\def\xitemx{\errmessage{@xitemx while not in a table}}
		1864
		1865	% Contains a kludge to get @end[description] to work.
		1866	\def\description{\tablez{\dontindex}{1}{}{}{}{}}
		1867
		1868	% @table, @ftable, @vtable.
		1869	\def\table{\begingroup\inENV\obeylines\obeyspaces\tablex}
		1870	{\obeylines\obeyspaces%
		1871	\gdef\tablex #1^^M{%
		1872	\tabley\dontindex#1 \endtabley}}
		1873
		1874	\def\ftable{\begingroup\inENV\obeylines\obeyspaces\ftablex}
		1875	{\obeylines\obeyspaces%
		1876	\gdef\ftablex #1^^M{%
		1877	\tabley\fnitemindex#1 \endtabley
		1878	\def\Eftable{\endgraf\afterenvbreak\endgroup}%
		1879	\let\Etable=\relax}}
		1880
		1881	\def\vtable{\begingroup\inENV\obeylines\obeyspaces\vtablex}
		1882	{\obeylines\obeyspaces%
		1883	\gdef\vtablex #1^^M{%
		1884	\tabley\vritemindex#1 \endtabley
		1885	\def\Evtable{\endgraf\afterenvbreak\endgroup}%
		1886	\let\Etable=\relax}}
		1887
		1888	\def\dontindex #1{}
		1889	\def\fnitemindex #1{\doind {fn}{\code{#1}}}%
		1890	\def\vritemindex #1{\doind {vr}{\code{#1}}}%
		1891
		1892	{\obeyspaces %
		1893	\gdef\tabley#1#2 #3 #4 #5 #6 #7\endtabley{\endgroup%
		1894	\tablez{#1}{#2}{#3}{#4}{#5}{#6}}}
		1895
		1896	\def\tablez #1#2#3#4#5#6{%
		1897	\aboveenvbreak %
		1898	\begingroup %
		1899	\def\Edescription{\Etable}% Necessary kludge.
		1900	\let\itemindex=#1%
		1901	\ifnum 0#3>0 \advance \leftskip by #3\mil \fi %
		1902	\ifnum 0#4>0 \tableindent=#4\mil \fi %
		1903	\ifnum 0#5>0 \advance \rightskip by #5\mil \fi %
		1904	\def\itemfont{#2}%
		1905	\itemmax=\tableindent %
		1906	\advance \itemmax by -\itemmargin %
		1907	\advance \leftskip by \tableindent %
		1908	\exdentamount=\tableindent
		1909	\parindent = 0pt
		1910	\parskip = \smallskipamount
		1911	\ifdim \parskip=0pt \parskip=2pt \fi%
		1912	\def\Etable{\endgraf\afterenvbreak\endgroup}%
		1913	\let\item = \internalBitem %
		1914	\let\itemx = \internalBitemx %
		1915	\let\kitem = \internalBkitem %
		1916	\let\kitemx = \internalBkitemx %
		1917	\let\xitem = \internalBxitem %
		1918	\let\xitemx = \internalBxitemx %
		1919	}
		1920
		1921	% This is the counter used by @enumerate, which is really @itemize
		1922
		1923	\newcount \itemno
		1924
		1925	\def\itemize{\parsearg\itemizezzz}
		1926
		1927	\def\itemizezzz #1{%
		1928	\begingroup % ended by the @end itemize
		1929	\itemizey {#1}{\Eitemize}
		1930	}
		1931
		1932	\def\itemizey #1#2{%
		1933	\aboveenvbreak %
		1934	\itemmax=\itemindent %
		1935	\advance \itemmax by -\itemmargin %
		1936	\advance \leftskip by \itemindent %
		1937	\exdentamount=\itemindent
		1938	\parindent = 0pt %
		1939	\parskip = \smallskipamount %
		1940	\ifdim \parskip=0pt \parskip=2pt \fi%
		1941	\def#2{\endgraf\afterenvbreak\endgroup}%
		1942	\def\itemcontents{#1}%
		1943	\let\item=\itemizeitem}
		1944
		1945	% Set sfcode to normal for the chars that usually have another value.
		1946	% These are `.?!:;,'
		1947	\def\frenchspacing{\sfcode46=1000 \sfcode63=1000 \sfcode33=1000
		1948	\sfcode58=1000 \sfcode59=1000 \sfcode44=1000 }
		1949
		1950	% \splitoff TOKENS\endmark defines \first to be the first token in
		1951	% TOKENS, and \rest to be the remainder.
		1952	%
		1953	\def\splitoff#1#2\endmark{\def\first{#1}\def\rest{#2}}%
		1954
		1955	% Allow an optional argument of an uppercase letter, lowercase letter,
		1956	% or number, to specify the first label in the enumerated list. No
		1957	% argument is the same as `1'.
		1958	%
		1959	\def\enumerate{\parsearg\enumeratezzz}
		1960	\def\enumeratezzz #1{\enumeratey #1 \endenumeratey}
		1961	\def\enumeratey #1 #2\endenumeratey{%
		1962	\begingroup % ended by the @end enumerate
		1963	%
		1964	% If we were given no argument, pretend we were given `1'.
		1965	\def\thearg{#1}%
		1966	\ifx\thearg\empty \def\thearg{1}\fi
		1967	%
		1968	% Detect if the argument is a single token. If so, it might be a
		1969	% letter. Otherwise, the only valid thing it can be is a number.
		1970	% (We will always have one token, because of the test we just made.
		1971	% This is a good thing, since \splitoff doesn't work given nothing at
		1972	% all -- the first parameter is undelimited.)
		1973	\expandafter\splitoff\thearg\endmark
		1974	\ifx\rest\empty
		1975	% Only one token in the argument. It could still be anything.
		1976	% A ``lowercase letter'' is one whose \lccode is nonzero.
		1977	% An ``uppercase letter'' is one whose \lccode is both nonzero, and
		1978	% not equal to itself.
		1979	% Otherwise, we assume it's a number.
		1980	%
		1981	% We need the \relax at the end of the \ifnum lines to stop TeX from
		1982	% continuing to look for a <number>.
		1983	%
		1984	\ifnum\lccode\expandafter`\thearg=0\relax
		1985	\numericenumerate % a number (we hope)
		1986	\else
		1987	% It's a letter.
		1988	\ifnum\lccode\expandafter`\thearg=\expandafter`\thearg\relax
		1989	\lowercaseenumerate % lowercase letter
		1990	\else
		1991	\uppercaseenumerate % uppercase letter
		1992	\fi
		1993	\fi
		1994	\else
		1995	% Multiple tokens in the argument. We hope it's a number.
		1996	\numericenumerate
		1997	\fi
		1998	}
		1999
		2000	% An @enumerate whose labels are integers. The starting integer is
		2001	% given in \thearg.
		2002	%
		2003	\def\numericenumerate{%
		2004	\itemno = \thearg
		2005	\startenumeration{\the\itemno}%
		2006	}
		2007
		2008	% The starting (lowercase) letter is in \thearg.
		2009	\def\lowercaseenumerate{%
		2010	\itemno = \expandafter`\thearg
		2011	\startenumeration{%
		2012	% Be sure we're not beyond the end of the alphabet.
		2013	\ifnum\itemno=0
		2014	\errmessage{No more lowercase letters in @enumerate; get a bigger
		2015	alphabet}%
		2016	\fi
		2017	\char\lccode\itemno
		2018	}%
		2019	}
		2020
		2021	% The starting (uppercase) letter is in \thearg.
		2022	\def\uppercaseenumerate{%
		2023	\itemno = \expandafter`\thearg
		2024	\startenumeration{%
		2025	% Be sure we're not beyond the end of the alphabet.
		2026	\ifnum\itemno=0
		2027	\errmessage{No more uppercase letters in @enumerate; get a bigger
		2028	alphabet}
		2029	\fi
		2030	\char\uccode\itemno
		2031	}%
		2032	}
		2033
		2034	% Call itemizey, adding a period to the first argument and supplying the
		2035	% common last two arguments. Also subtract one from the initial value in
		2036	% \itemno, since @item increments \itemno.
		2037	%
		2038	\def\startenumeration#1{%
		2039	\advance\itemno by -1
		2040	\itemizey{#1.}\Eenumerate\flushcr
		2041	}
		2042
		2043	% @alphaenumerate and @capsenumerate are abbreviations for giving an arg
		2044	% to @enumerate.
		2045	%
		2046	\def\alphaenumerate{\enumerate{a}}
		2047	\def\capsenumerate{\enumerate{A}}
		2048	\def\Ealphaenumerate{\Eenumerate}
		2049	\def\Ecapsenumerate{\Eenumerate}
		2050
		2051	% Definition of @item while inside @itemize.
		2052
		2053	\def\itemizeitem{%
		2054	\advance\itemno by 1
		2055	{\let\par=\endgraf \smallbreak}%
		2056	\ifhmode \errmessage{In hmode at itemizeitem}\fi
		2057	{\parskip=0in \hskip 0pt
		2058	\hbox to 0pt{\hss \itemcontents\hskip \itemmargin}%
		2059	\vadjust{\penalty 1200}}%
		2060	\flushcr}
		2061
		2062	% @multitable macros
		2063	% Amy Hendrickson, 8/18/94, 3/6/96
		2064	%
		2065	% @multitable ... @end multitable will make as many columns as desired.
		2066	% Contents of each column will wrap at width given in preamble. Width
		2067	% can be specified either with sample text given in a template line,
		2068	% or in percent of \hsize, the current width of text on page.
		2069
		2070	% Table can continue over pages but will only break between lines.
		2071
		2072	% To make preamble:
		2073	%
		2074	% Either define widths of columns in terms of percent of \hsize:
		2075	% @multitable @columnfractions .25 .3 .45
		2076	% @item ...
		2077	%
		2078	% Numbers following @columnfractions are the percent of the total
		2079	% current hsize to be used for each column. You may use as many
		2080	% columns as desired.
		2081
		2082
		2083	% Or use a template:
		2084	% @multitable {Column 1 template} {Column 2 template} {Column 3 template}
		2085	% @item ...
		2086	% using the widest term desired in each column.
		2087	%
		2088	% For those who want to use more than one line's worth of words in
		2089	% the preamble, break the line within one argument and it
		2090	% will parse correctly, i.e.,
		2091	%
		2092	% @multitable {Column 1 template} {Column 2 template} {Column 3
		2093	% template}
		2094	% Not:
		2095	% @multitable {Column 1 template} {Column 2 template}
		2096	% {Column 3 template}
		2097
		2098	% Each new table line starts with @item, each subsequent new column
		2099	% starts with @tab. Empty columns may be produced by supplying @tab's
		2100	% with nothing between them for as many times as empty columns are needed,
		2101	% ie, @tab@tab@tab will produce two empty columns.
		2102
		2103	% @item, @tab, @multitable or @end multitable do not need to be on their
		2104	% own lines, but it will not hurt if they are.
		2105
		2106	% Sample multitable:
		2107
		2108	% @multitable {Column 1 template} {Column 2 template} {Column 3 template}
		2109	% @item first col stuff @tab second col stuff @tab third col
		2110	% @item
		2111	% first col stuff
		2112	% @tab
		2113	% second col stuff
		2114	% @tab
		2115	% third col
		2116	% @item first col stuff @tab second col stuff
		2117	% @tab Many paragraphs of text may be used in any column.
		2118	%
		2119	% They will wrap at the width determined by the template.
		2120	% @item@tab@tab This will be in third column.
		2121	% @end multitable
		2122
		2123	% Default dimensions may be reset by user.
		2124	% @multitableparskip is vertical space between paragraphs in table.
		2125	% @multitableparindent is paragraph indent in table.
		2126	% @multitablecolmargin is horizontal space to be left between columns.
		2127	% @multitablelinespace is space to leave between table items, baseline
		2128	% to baseline.
		2129	% 0pt means it depends on current normal line spacing.
		2130	%
		2131	\newskip\multitableparskip
		2132	\newskip\multitableparindent
		2133	\newdimen\multitablecolspace
		2134	\newskip\multitablelinespace
		2135	\multitableparskip=0pt
		2136	\multitableparindent=6pt
		2137	\multitablecolspace=12pt
		2138	\multitablelinespace=0pt
		2139
		2140	% Macros used to set up halign preamble:
		2141	%
		2142	\let\endsetuptable\relax
		2143	\def\xendsetuptable{\endsetuptable}
		2144	\let\columnfractions\relax
		2145	\def\xcolumnfractions{\columnfractions}
		2146	\newif\ifsetpercent
		2147
		2148	% #1 is the part of the @columnfraction before the decimal point, which
		2149	% is presumably either 0 or the empty string (but we don't check, we
		2150	% just throw it away). #2 is the decimal part, which we use as the
		2151	% percent of \hsize for this column.
		2152	\def\pickupwholefraction#1.#2 {%
		2153	\global\advance\colcount by 1
		2154	\expandafter\xdef\csname col\the\colcount\endcsname{.#2\hsize}%
		2155	\setuptable
		2156	}
		2157
		2158	\newcount\colcount
		2159	\def\setuptable#1{%
		2160	\def\firstarg{#1}%
		2161	\ifx\firstarg\xendsetuptable
		2162	\let\go = \relax
		2163	\else
		2164	\ifx\firstarg\xcolumnfractions
		2165	\global\setpercenttrue
		2166	\else
		2167	\ifsetpercent
		2168	\let\go\pickupwholefraction
		2169	\else
		2170	\global\advance\colcount by 1
		2171	\setbox0=\hbox{#1\unskip }% Add a normal word space as a separator;
		2172	% typically that is always in the input, anyway.
		2173	\expandafter\xdef\csname col\the\colcount\endcsname{\the\wd0}%
		2174	\fi
		2175	\fi
		2176	\ifx\go\pickupwholefraction
		2177	% Put the argument back for the \pickupwholefraction call, so
		2178	% we'll always have a period there to be parsed.
		2179	\def\go{\pickupwholefraction#1}%
		2180	\else
		2181	\let\go = \setuptable
		2182	\fi%
		2183	\fi
		2184	\go
		2185	}
		2186
		2187	% multitable syntax
		2188	\def\tab{&\hskip1sp\relax} % 2/2/96
		2189	% tiny skip here makes sure this column space is
		2190	% maintained, even if it is never used.
		2191
		2192	% @multitable ... @end multitable definitions:
		2193	%
		2194	\def\multitable{\parsearg\dotable}
		2195	\def\dotable#1{\bgroup
		2196	\vskip\parskip
		2197	\let\item\crcr
		2198	\tolerance=9500
		2199	\hbadness=9500
		2200	\setmultitablespacing
		2201	\parskip=\multitableparskip
		2202	\parindent=\multitableparindent
		2203	\overfullrule=0pt
		2204	\global\colcount=0
		2205	\def\Emultitable{\global\setpercentfalse\cr\egroup\egroup}%
		2206	%
		2207	% To parse everything between @multitable and @item:
		2208	\setuptable#1 \endsetuptable
		2209	%
		2210	% \everycr will reset column counter, \colcount, at the end of
		2211	% each line. Every column entry will cause \colcount to advance by one.
		2212	% The table preamble
		2213	% looks at the current \colcount to find the correct column width.
		2214	\everycr{\noalign{%
		2215	%
		2216	% \filbreak%% keeps underfull box messages off when table breaks over pages.
		2217	% Maybe so, but it also creates really weird page breaks when the table
		2218	% breaks over pages. Wouldn't \vfil be better? Wait until the problem
		2219	% manifests itself, so it can be fixed for real --karl.
		2220	\global\colcount=0\relax}}%
		2221	%
		2222	% This preamble sets up a generic column definition, which will
		2223	% be used as many times as user calls for columns.
		2224	% \vtop will set a single line and will also let text wrap and
		2225	% continue for many paragraphs if desired.
		2226	\halign\bgroup&\global\advance\colcount by 1\relax
		2227	\multistrut\vtop{\hsize=\expandafter\csname col\the\colcount\endcsname
		2228	%
		2229	% In order to keep entries from bumping into each other
		2230	% we will add a \leftskip of \multitablecolspace to all columns after
		2231	% the first one.
		2232	%
		2233	% If a template has been used, we will add \multitablecolspace
		2234	% to the width of each template entry.
		2235	%
		2236	% If the user has set preamble in terms of percent of \hsize we will
		2237	% use that dimension as the width of the column, and the \leftskip
		2238	% will keep entries from bumping into each other. Table will start at
		2239	% left margin and final column will justify at right margin.
		2240	%
		2241	% Make sure we don't inherit \rightskip from the outer environment.
		2242	\rightskip=0pt
		2243	\ifnum\colcount=1
		2244	% The first column will be indented with the surrounding text.
		2245	\advance\hsize by\leftskip
		2246	\else
		2247	\ifsetpercent \else
		2248	% If user has not set preamble in terms of percent of \hsize
		2249	% we will advance \hsize by \multitablecolspace.
		2250	\advance\hsize by \multitablecolspace
		2251	\fi
		2252	% In either case we will make \leftskip=\multitablecolspace:
		2253	\leftskip=\multitablecolspace
		2254	\fi
		2255	% Ignoring space at the beginning and end avoids an occasional spurious
		2256	% blank line, when TeX decides to break the line at the space before the
		2257	% box from the multistrut, so the strut ends up on a line by itself.
		2258	% For example:
		2259	% @multitable @columnfractions .11 .89
		2260	% @item @code{#}
		2261	% @tab Legal holiday which is valid in major parts of the whole country.
		2262	% Is automatically provided with highlighting sequences respectively marking
		2263	% characters.
		2264	\noindent\ignorespaces##\unskip\multistrut}\cr
		2265	}
		2266
		2267	\def\setmultitablespacing{% test to see if user has set \multitablelinespace.
		2268	% If so, do nothing. If not, give it an appropriate dimension based on
		2269	% current baselineskip.
		2270	\ifdim\multitablelinespace=0pt
		2271	%% strut to put in table in case some entry doesn't have descenders,
		2272	%% to keep lines equally spaced
		2273	\let\multistrut = \strut
		2274	%% Test to see if parskip is larger than space between lines of
		2275	%% table. If not, do nothing.
		2276	%% If so, set to same dimension as multitablelinespace.
		2277	\else
		2278	\gdef\multistrut{\vrule height\multitablelinespace depth\dp0
		2279	width0pt\relax} \fi
		2280	\ifdim\multitableparskip>\multitablelinespace
		2281	\global\multitableparskip=\multitablelinespace
		2282	\global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
		2283	%% than skip between lines in the table.
		2284	\fi%
		2285	\ifdim\multitableparskip=0pt
		2286	\global\multitableparskip=\multitablelinespace
		2287	\global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
		2288	%% than skip between lines in the table.
		2289	\fi}
		2290
		2291
		2292	\message{indexing,}
		2293	% Index generation facilities
		2294
		2295	% Define \newwrite to be identical to plain tex's \newwrite
		2296	% except not \outer, so it can be used within \newindex.
		2297	{\catcode`\@=11
		2298	\gdef\newwrite{\alloc@7\write\chardef\sixt@@n}}
		2299
		2300	% \newindex {foo} defines an index named foo.
		2301	% It automatically defines \fooindex such that
		2302	% \fooindex ...rest of line... puts an entry in the index foo.
		2303	% It also defines \fooindfile to be the number of the output channel for
		2304	% the file that accumulates this index. The file's extension is foo.
		2305	% The name of an index should be no more than 2 characters long
		2306	% for the sake of vms.
		2307	%
		2308	\def\newindex#1{%
		2309	\iflinks
		2310	\expandafter\newwrite \csname#1indfile\endcsname
		2311	\openout \csname#1indfile\endcsname \jobname.#1 % Open the file
		2312	\fi
		2313	\expandafter\xdef\csname#1index\endcsname{% % Define @#1index
		2314	\noexpand\doindex{#1}}
		2315	}
		2316
		2317	% @defindex foo == \newindex{foo}
		2318
		2319	\def\defindex{\parsearg\newindex}
		2320
		2321	% Define @defcodeindex, like @defindex except put all entries in @code.
		2322
		2323	\def\newcodeindex#1{%
		2324	\iflinks
		2325	\expandafter\newwrite \csname#1indfile\endcsname
		2326	\openout \csname#1indfile\endcsname \jobname.#1
		2327	\fi
		2328	\expandafter\xdef\csname#1index\endcsname{%
		2329	\noexpand\docodeindex{#1}}
		2330	}
		2331
		2332	\def\defcodeindex{\parsearg\newcodeindex}
		2333
		2334	% @synindex foo bar makes index foo feed into index bar.
		2335	% Do this instead of @defindex foo if you don't want it as a separate index.
		2336	% The \closeout helps reduce unnecessary open files; the limit on the
		2337	% Acorn RISC OS is a mere 16 files.
		2338	\def\synindex#1 #2 {%
		2339	\expandafter\let\expandafter\synindexfoo\expandafter=\csname#2indfile\endcsname
		2340	\expandafter\closeout\csname#1indfile\endcsname
		2341	\expandafter\let\csname#1indfile\endcsname=\synindexfoo
		2342	\expandafter\xdef\csname#1index\endcsname{% define \xxxindex
		2343	\noexpand\doindex{#2}}%
		2344	}
		2345
		2346	% @syncodeindex foo bar similar, but put all entries made for index foo
		2347	% inside @code.
		2348	\def\syncodeindex#1 #2 {%
		2349	\expandafter\let\expandafter\synindexfoo\expandafter=\csname#2indfile\endcsname
		2350	\expandafter\closeout\csname#1indfile\endcsname
		2351	\expandafter\let\csname#1indfile\endcsname=\synindexfoo
		2352	\expandafter\xdef\csname#1index\endcsname{% define \xxxindex
		2353	\noexpand\docodeindex{#2}}%
		2354	}
		2355
		2356	% Define \doindex, the driver for all \fooindex macros.
		2357	% Argument #1 is generated by the calling \fooindex macro,
		2358	% and it is "foo", the name of the index.
		2359
		2360	% \doindex just uses \parsearg; it calls \doind for the actual work.
		2361	% This is because \doind is more useful to call from other macros.
		2362
		2363	% There is also \dosubind {index}{topic}{subtopic}
		2364	% which makes an entry in a two-level index such as the operation index.
		2365
		2366	\def\doindex#1{\edef\indexname{#1}\parsearg\singleindexer}
		2367	\def\singleindexer #1{\doind{\indexname}{#1}}
		2368
		2369	% like the previous two, but they put @code around the argument.
		2370	\def\docodeindex#1{\edef\indexname{#1}\parsearg\singlecodeindexer}
		2371	\def\singlecodeindexer #1{\doind{\indexname}{\code{#1}}}
		2372
		2373	\def\indexdummies{%
		2374	\def\ { }%
		2375	% Take care of the plain tex accent commands.
		2376	\def\"{\realbackslash "}%
		2377	\def\`{\realbackslash `}%
		2378	\def\'{\realbackslash '}%
		2379	\def\^{\realbackslash ^}%
		2380	\def\~{\realbackslash ~}%
		2381	\def\={\realbackslash =}%
		2382	\def\b{\realbackslash b}%
		2383	\def\c{\realbackslash c}%
		2384	\def\d{\realbackslash d}%
		2385	\def\u{\realbackslash u}%
		2386	\def\v{\realbackslash v}%
		2387	\def\H{\realbackslash H}%
		2388	% Take care of the plain tex special European modified letters.
		2389	\def\oe{\realbackslash oe}%
		2390	\def\ae{\realbackslash ae}%
		2391	\def\aa{\realbackslash aa}%
		2392	\def\OE{\realbackslash OE}%
		2393	\def\AE{\realbackslash AE}%
		2394	\def\AA{\realbackslash AA}%
		2395	\def\o{\realbackslash o}%
		2396	\def\O{\realbackslash O}%
		2397	\def\l{\realbackslash l}%
		2398	\def\L{\realbackslash L}%
		2399	\def\ss{\realbackslash ss}%
		2400	% Take care of texinfo commands likely to appear in an index entry.
		2401	% (Must be a way to avoid doing expansion at all, and thus not have to
		2402	% laboriously list every single command here.)
		2403	\def\@{@}% will be @@ when we switch to @ as escape char.
		2404	% Need these in case \tex is in effect and \{ is a \delimiter again.
		2405	% But can't use \lbracecmd and \rbracecmd because texindex assumes
		2406	% braces and backslashes are used only as delimiters.
		2407	\let\{ = \mylbrace
		2408	\let\} = \myrbrace
		2409	\def\_{{\realbackslash _}}%
		2410	\def\w{\realbackslash w }%
		2411	\def\bf{\realbackslash bf }%
		2412	%\def\rm{\realbackslash rm }%
		2413	\def\sl{\realbackslash sl }%
		2414	\def\sf{\realbackslash sf}%
		2415	\def\tt{\realbackslash tt}%
		2416	\def\gtr{\realbackslash gtr}%
		2417	\def\less{\realbackslash less}%
		2418	\def\hat{\realbackslash hat}%
		2419	\def\TeX{\realbackslash TeX}%
		2420	\def\dots{\realbackslash dots }%
		2421	\def\result{\realbackslash result}%
		2422	\def\equiv{\realbackslash equiv}%
		2423	\def\expansion{\realbackslash expansion}%
		2424	\def\print{\realbackslash print}%
		2425	\def\error{\realbackslash error}%
		2426	\def\point{\realbackslash point}%
		2427	\def\copyright{\realbackslash copyright}%
		2428	\def\tclose##1{\realbackslash tclose {##1}}%
		2429	\def\code##1{\realbackslash code {##1}}%
		2430	\def\uref##1{\realbackslash uref {##1}}%
		2431	\def\url##1{\realbackslash url {##1}}%
		2432	\def\env##1{\realbackslash env {##1}}%
		2433	\def\command##1{\realbackslash command {##1}}%
		2434	\def\option##1{\realbackslash option {##1}}%
		2435	\def\dotless##1{\realbackslash dotless {##1}}%
		2436	\def\samp##1{\realbackslash samp {##1}}%
		2437	\def\,##1{\realbackslash ,{##1}}%
		2438	\def\t##1{\realbackslash t {##1}}%
		2439	\def\r##1{\realbackslash r {##1}}%
		2440	\def\i##1{\realbackslash i {##1}}%
		2441	\def\b##1{\realbackslash b {##1}}%
		2442	\def\sc##1{\realbackslash sc {##1}}%
		2443	\def\cite##1{\realbackslash cite {##1}}%
		2444	\def\key##1{\realbackslash key {##1}}%
		2445	\def\file##1{\realbackslash file {##1}}%
		2446	\def\var##1{\realbackslash var {##1}}%
		2447	\def\kbd##1{\realbackslash kbd {##1}}%
		2448	\def\dfn##1{\realbackslash dfn {##1}}%
		2449	\def\emph##1{\realbackslash emph {##1}}%
		2450	\def\acronym##1{\realbackslash acronym {##1}}%
		2451	%
		2452	% Handle some cases of @value -- where the variable name does not
		2453	% contain - or _, and the value does not contain any
		2454	% (non-fully-expandable) commands.
		2455	\let\value = \expandablevalue
		2456	%
		2457	\unsepspaces
		2458	}
		2459
		2460	% If an index command is used in an @example environment, any spaces
		2461	% therein should become regular spaces in the raw index file, not the
		2462	% expansion of \tie (\\leavevmode \penalty \@M \ ).
		2463	{\obeyspaces
		2464	\gdef\unsepspaces{\obeyspaces\let =\space}}
		2465
		2466	% \indexnofonts no-ops all font-change commands.
		2467	% This is used when outputting the strings to sort the index by.
		2468	\def\indexdummyfont#1{#1}
		2469	\def\indexdummytex{TeX}
		2470	\def\indexdummydots{...}
		2471
		2472	\def\indexnofonts{%
		2473	% Just ignore accents.
		2474	\let\,=\indexdummyfont
		2475	\let\"=\indexdummyfont
		2476	\let\`=\indexdummyfont
		2477	\let\'=\indexdummyfont
		2478	\let\^=\indexdummyfont
		2479	\let\~=\indexdummyfont
		2480	\let\==\indexdummyfont
		2481	\let\b=\indexdummyfont
		2482	\let\c=\indexdummyfont
		2483	\let\d=\indexdummyfont
		2484	\let\u=\indexdummyfont
		2485	\let\v=\indexdummyfont
		2486	\let\H=\indexdummyfont
		2487	\let\dotless=\indexdummyfont
		2488	% Take care of the plain tex special European modified letters.
		2489	\def\oe{oe}%
		2490	\def\ae{ae}%
		2491	\def\aa{aa}%
		2492	\def\OE{OE}%
		2493	\def\AE{AE}%
		2494	\def\AA{AA}%
		2495	\def\o{o}%
		2496	\def\O{O}%
		2497	\def\l{l}%
		2498	\def\L{L}%
		2499	\def\ss{ss}%
		2500	\let\w=\indexdummyfont
		2501	\let\t=\indexdummyfont
		2502	\let\r=\indexdummyfont
		2503	\let\i=\indexdummyfont
		2504	\let\b=\indexdummyfont
		2505	\let\emph=\indexdummyfont
		2506	\let\strong=\indexdummyfont
		2507	\let\cite=\indexdummyfont
		2508	\let\sc=\indexdummyfont
		2509	%Don't no-op \tt, since it isn't a user-level command
		2510	% and is used in the definitions of the active chars like <, >, \|...
		2511	%\let\tt=\indexdummyfont
		2512	\let\tclose=\indexdummyfont
		2513	\let\code=\indexdummyfont
		2514	\let\url=\indexdummyfont
		2515	\let\uref=\indexdummyfont
		2516	\let\env=\indexdummyfont
		2517	\let\command=\indexdummyfont
		2518	\let\option=\indexdummyfont
		2519	\let\file=\indexdummyfont
		2520	\let\samp=\indexdummyfont
		2521	\let\kbd=\indexdummyfont
		2522	\let\key=\indexdummyfont
		2523	\let\var=\indexdummyfont
		2524	\let\TeX=\indexdummytex
		2525	\let\dots=\indexdummydots
		2526	\def\@{@}%
		2527	}
		2528
		2529	% To define \realbackslash, we must make \ not be an escape.
		2530	% We must first make another character (@) an escape
		2531	% so we do not become unable to do a definition.
		2532
		2533	{\catcode`\@=0 \catcode`\\=\other
		2534	@gdef@realbackslash{\}}
		2535
		2536	\let\indexbackslash=0 %overridden during \printindex.
		2537	\let\SETmarginindex=\relax % put index entries in margin (undocumented)?
		2538
		2539	% For \ifx comparisons.
		2540	\def\emptymacro{\empty}
		2541
		2542	% Most index entries go through here, but \dosubind is the general case.
		2543	%
		2544	\def\doind#1#2{\dosubind{#1}{#2}\empty}
		2545
		2546	% Workhorse for all \fooindexes.
		2547	% #1 is name of index, #2 is stuff to put there, #3 is subentry --
		2548	% \empty if called from \doind, as we usually are. The main exception
		2549	% is with defuns, which call us directly.
		2550	%
		2551	\def\dosubind#1#2#3{%
		2552	% Put the index entry in the margin if desired.
		2553	\ifx\SETmarginindex\relax\else
		2554	\insert\margin{\hbox{\vrule height8pt depth3pt width0pt #2}}%
		2555	\fi
		2556	{%
		2557	\count255=\lastpenalty
		2558	{%
		2559	\indexdummies % Must do this here, since \bf, etc expand at this stage
		2560	\escapechar=`\\
		2561	{%
		2562	\let\folio = 0% We will expand all macros now EXCEPT \folio.
		2563	\def\rawbackslashxx{\indexbackslash}% \indexbackslash isn't defined now
		2564	% so it will be output as is; and it will print as backslash.
		2565	%
		2566	\def\thirdarg{#3}%
		2567	%
		2568	% If third arg is present, precede it with space in sort key.
		2569	\ifx\thirdarg\emptymacro
		2570	\let\subentry = \empty
		2571	\else
		2572	\def\subentry{ #3}%
		2573	\fi
		2574	%
		2575	% First process the index-string with all font commands turned off
		2576	% to get the string to sort by.
		2577	{\indexnofonts \xdef\indexsorttmp{#2\subentry}}%
		2578	%
		2579	% Now produce the complete index entry, with both the sort key and the
		2580	% original text, including any font commands.
		2581	\toks0 = {#2}%
		2582	\edef\temp{%
		2583	\write\csname#1indfile\endcsname{%
		2584	\realbackslash entry{\indexsorttmp}{\folio}{\the\toks0}}%
		2585	}%
		2586	%
		2587	% If third (subentry) arg is present, add it to the index string.
		2588	\ifx\thirdarg\emptymacro \else
		2589	\toks0 = {#3}%
		2590	\edef\temp{\temp{\the\toks0}}%
		2591	\fi
		2592	%
		2593	% If a skip is the last thing on the list now, preserve it
		2594	% by backing up by \lastskip, doing the \write, then inserting
		2595	% the skip again. Otherwise, the whatsit generated by the
		2596	% \write will make \lastskip zero. The result is that sequences
		2597	% like this:
		2598	% @end defun
		2599	% @tindex whatever
		2600	% @defun ...
		2601	% will have extra space inserted, because the \medbreak in the
		2602	% start of the @defun won't see the skip inserted by the @end of
		2603	% the previous defun.
		2604	%
		2605	% But don't do any of this if we're not in vertical mode. We
		2606	% don't want to do a \vskip and prematurely end a paragraph.
		2607	%
		2608	% Avoid page breaks due to these extra skips, too.
		2609	%
		2610	\iflinks
		2611	\ifvmode
		2612	\skip0 = \lastskip
		2613	\ifdim\lastskip = 0pt \else \nobreak\vskip-\lastskip \fi
		2614	\fi
		2615	%
		2616	\temp % do the write
		2617	%
		2618	%
		2619	\ifvmode \ifdim\skip0 = 0pt \else \nobreak\vskip\skip0 \fi \fi
		2620	\fi
		2621	}%
		2622	}%
		2623	\penalty\count255
		2624	}%
		2625	}
		2626
		2627	% The index entry written in the file actually looks like
		2628	% \entry {sortstring}{page}{topic}
		2629	% or
		2630	% \entry {sortstring}{page}{topic}{subtopic}
		2631	% The texindex program reads in these files and writes files
		2632	% containing these kinds of lines:
		2633	% \initial {c}
		2634	% before the first topic whose initial is c
		2635	% \entry {topic}{pagelist}
		2636	% for a topic that is used without subtopics
		2637	% \primary {topic}
		2638	% for the beginning of a topic that is used with subtopics
		2639	% \secondary {subtopic}{pagelist}
		2640	% for each subtopic.
		2641
		2642	% Define the user-accessible indexing commands
		2643	% @findex, @vindex, @kindex, @cindex.
		2644
		2645	\def\findex {\fnindex}
		2646	\def\kindex {\kyindex}
		2647	\def\cindex {\cpindex}
		2648	\def\vindex {\vrindex}
		2649	\def\tindex {\tpindex}
		2650	\def\pindex {\pgindex}
		2651
		2652	\def\cindexsub {\begingroup\obeylines\cindexsub}
		2653	{\obeylines %
		2654	\gdef\cindexsub "#1" #2^^M{\endgroup %
		2655	\dosubind{cp}{#2}{#1}}}
		2656
		2657	% Define the macros used in formatting output of the sorted index material.
		2658
		2659	% @printindex causes a particular index (the ??s file) to get printed.
		2660	% It does not print any chapter heading (usually an @unnumbered).
		2661	%
		2662	\def\printindex{\parsearg\doprintindex}
		2663	\def\doprintindex#1{\begingroup
		2664	\dobreak \chapheadingskip{10000}%
		2665	%
		2666	\indexfonts \rm
		2667	\tolerance = 9500
		2668	\indexbreaks
		2669	%
		2670	% See if the index file exists and is nonempty.
		2671	% Change catcode of @ here so that if the index file contains
		2672	% \initial {@}
		2673	% as its first line, TeX doesn't complain about mismatched braces
		2674	% (because it thinks @} is a control sequence).
		2675	\catcode`\@ = 11
		2676	\openin 1 \jobname.#1s
		2677	\ifeof 1
		2678	% \enddoublecolumns gets confused if there is no text in the index,
		2679	% and it loses the chapter title and the aux file entries for the
		2680	% index. The easiest way to prevent this problem is to make sure
		2681	% there is some text.
		2682	(Index is nonexistent)
		2683	\else
		2684	%
		2685	% If the index file exists but is empty, then \openin leaves \ifeof
		2686	% false. We have to make TeX try to read something from the file, so
		2687	% it can discover if there is anything in it.
		2688	\read 1 to \temp
		2689	\ifeof 1
		2690	(Index is empty)
		2691	\else
		2692	% Index files are almost Texinfo source, but we use \ as the escape
		2693	% character. It would be better to use @, but that's too big a change
		2694	% to make right now.
		2695	\def\indexbackslash{\rawbackslashxx}%
		2696	\catcode`\\ = 0
		2697	\escapechar = `\\
		2698	\begindoublecolumns
		2699	\input \jobname.#1s
		2700	\enddoublecolumns
		2701	\fi
		2702	\fi
		2703	\closein 1
		2704	\endgroup}
		2705
		2706	% These macros are used by the sorted index file itself.
		2707	% Change them to control the appearance of the index.
		2708
		2709	\def\initial#1{{%
		2710	% Some minor font changes for the special characters.
		2711	\let\tentt=\sectt \let\tt=\sectt \let\sf=\sectt
		2712	%
		2713	% Remove any glue we may have, we'll be inserting our own.
		2714	\removelastskip
		2715	%
		2716	% We like breaks before the index initials, so insert a bonus.
		2717	\penalty -300
		2718	%
		2719	% Typeset the initial. Making this add up to a whole number of
		2720	% baselineskips increases the chance of the dots lining up from column
		2721	% to column. It still won't often be perfect, because of the stretch
		2722	% we need before each entry, but it's better.
		2723	%
		2724	% No shrink because it confuses \balancecolumns.
		2725	\vskip 1.67\baselineskip plus .5\baselineskip
		2726	\leftline{\secbf #1}%
		2727	\vskip .33\baselineskip plus .1\baselineskip
		2728	%
		2729	% Do our best not to break after the initial.
		2730	\nobreak
		2731	}}
		2732
		2733	% This typesets a paragraph consisting of #1, dot leaders, and then #2
		2734	% flush to the right margin. It is used for index and table of contents
		2735	% entries. The paragraph is indented by \leftskip.
		2736	%
		2737	\def\entry#1#2{\begingroup
		2738	%
		2739	% Start a new paragraph if necessary, so our assignments below can't
		2740	% affect previous text.
		2741	\par
		2742	%
		2743	% Do not fill out the last line with white space.
		2744	\parfillskip = 0in
		2745	%
		2746	% No extra space above this paragraph.
		2747	\parskip = 0in
		2748	%
		2749	% Do not prefer a separate line ending with a hyphen to fewer lines.
		2750	\finalhyphendemerits = 0
		2751	%
		2752	% \hangindent is only relevant when the entry text and page number
		2753	% don't both fit on one line. In that case, bob suggests starting the
		2754	% dots pretty far over on the line. Unfortunately, a large
		2755	% indentation looks wrong when the entry text itself is broken across
		2756	% lines. So we use a small indentation and put up with long leaders.
		2757	%
		2758	% \hangafter is reset to 1 (which is the value we want) at the start
		2759	% of each paragraph, so we need not do anything with that.
		2760	\hangindent = 2em
		2761	%
		2762	% When the entry text needs to be broken, just fill out the first line
		2763	% with blank space.
		2764	\rightskip = 0pt plus1fil
		2765	%
		2766	% A bit of stretch before each entry for the benefit of balancing columns.
		2767	\vskip 0pt plus1pt
		2768	%
		2769	% Start a ``paragraph'' for the index entry so the line breaking
		2770	% parameters we've set above will have an effect.
		2771	\noindent
		2772	%
		2773	% Insert the text of the index entry. TeX will do line-breaking on it.
		2774	#1%
		2775	% The following is kludged to not output a line of dots in the index if
		2776	% there are no page numbers. The next person who breaks this will be
		2777	% cursed by a Unix daemon.
		2778	\def\tempa{{\rm }}%
		2779	\def\tempb{#2}%
		2780	\edef\tempc{\tempa}%
		2781	\edef\tempd{\tempb}%
		2782	\ifx\tempc\tempd\ \else%
		2783	%
		2784	% If we must, put the page number on a line of its own, and fill out
		2785	% this line with blank space. (The \hfil is overwhelmed with the
		2786	% fill leaders glue in \indexdotfill if the page number does fit.)
		2787	\hfil\penalty50
		2788	\null\nobreak\indexdotfill % Have leaders before the page number.
		2789	%
		2790	% The `\ ' here is removed by the implicit \unskip that TeX does as
		2791	% part of (the primitive) \par. Without it, a spurious underfull
		2792	% \hbox ensues.
		2793	\ #2% The page number ends the paragraph.
		2794	\fi%
		2795	\par
		2796	\endgroup}
		2797
		2798	% Like \dotfill except takes at least 1 em.
		2799	\def\indexdotfill{\cleaders
		2800	\hbox{$\mathsurround=0pt \mkern1.5mu ${\it .}$ \mkern1.5mu$}\hskip 1em plus 1fill}
		2801
		2802	\def\primary #1{\line{#1\hfil}}
		2803
		2804	\newskip\secondaryindent \secondaryindent=0.5cm
		2805
		2806	\def\secondary #1#2{
		2807	{\parfillskip=0in \parskip=0in
		2808	\hangindent =1in \hangafter=1
		2809	\noindent\hskip\secondaryindent\hbox{#1}\indexdotfill #2\par
		2810	}}
		2811
		2812	% Define two-column mode, which we use to typeset indexes.
		2813	% Adapted from the TeXbook, page 416, which is to say,
		2814	% the manmac.tex format used to print the TeXbook itself.
		2815	\catcode`\@=11
		2816
		2817	\newbox\partialpage
		2818	\newdimen\doublecolumnhsize
		2819
		2820	\def\begindoublecolumns{\begingroup % ended by \enddoublecolumns
		2821	% Grab any single-column material above us.
		2822	\output = {\global\setbox\partialpage = \vbox{%
		2823	%
		2824	% Here is a possibility not foreseen in manmac: if we accumulate a
		2825	% whole lot of material, we might end up calling this \output
		2826	% routine twice in a row (see the doublecol-lose test, which is
		2827	% essentially a couple of indexes with @setchapternewpage off). In
		2828	% that case, we must prevent the second \partialpage from
		2829	% simply overwriting the first, causing us to lose the page.
		2830	% This will preserve it until a real output routine can ship it
		2831	% out. Generally, \partialpage will be empty when this runs and
		2832	% this will be a no-op.
		2833	\unvbox\partialpage
		2834	%
		2835	% Unvbox the main output page.
		2836	\unvbox255
		2837	\kern-\topskip \kern\baselineskip
		2838	}}%
		2839	\eject % run that output routine to set \partialpage
		2840	%
		2841	% Use the double-column output routine for subsequent pages.
		2842	\output = {\doublecolumnout}%
		2843	%
		2844	% Change the page size parameters. We could do this once outside this
		2845	% routine, in each of @smallbook, @afourpaper, and the default 8.5x11
		2846	% format, but then we repeat the same computation. Repeating a couple
		2847	% of assignments once per index is clearly meaningless for the
		2848	% execution time, so we may as well do it in one place.
		2849	%
		2850	% First we halve the line length, less a little for the gutter between
		2851	% the columns. We compute the gutter based on the line length, so it
		2852	% changes automatically with the paper format. The magic constant
		2853	% below is chosen so that the gutter has the same value (well, +-<1pt)
		2854	% as it did when we hard-coded it.
		2855	%
		2856	% We put the result in a separate register, \doublecolumhsize, so we
		2857	% can restore it in \pagesofar, after \hsize itself has (potentially)
		2858	% been clobbered.
		2859	%
		2860	\doublecolumnhsize = \hsize
		2861	\advance\doublecolumnhsize by -.04154\hsize
		2862	\divide\doublecolumnhsize by 2
		2863	\hsize = \doublecolumnhsize
		2864	%
		2865	% Double the \vsize as well. (We don't need a separate register here,
		2866	% since nobody clobbers \vsize.)
		2867	\advance\vsize by -\ht\partialpage
		2868	\vsize = 2\vsize
		2869	}
		2870
		2871	% The double-column output routine for all double-column pages except
		2872	% the last.
		2873	%
		2874	\def\doublecolumnout{%
		2875	\splittopskip=\topskip \splitmaxdepth=\maxdepth
		2876	% Get the available space for the double columns -- the normal
		2877	% (undoubled) page height minus any material left over from the
		2878	% previous page.
		2879	\dimen@ = \vsize
		2880	\divide\dimen@ by 2
		2881	%
		2882	% box0 will be the left-hand column, box2 the right.
		2883	\setbox0=\vsplit255 to\dimen@ \setbox2=\vsplit255 to\dimen@
		2884	\onepageout\pagesofar
		2885	\unvbox255
		2886	\penalty\outputpenalty
		2887	}
		2888	\def\pagesofar{%
		2889	% Re-output the contents of the output page -- any previous material,
		2890	% followed by the two boxes we just split, in box0 and box2.
		2891	\advance\vsize by \ht\partialpage
		2892	\unvbox\partialpage
		2893	%
		2894	\hsize = \doublecolumnhsize
		2895	\wd0=\hsize \wd2=\hsize
		2896	\hbox to\pagewidth{\box0\hfil\box2}%
		2897	}
		2898	\def\enddoublecolumns{%
		2899	\output = {%
		2900	% Split the last of the double-column material. Leave it on the
		2901	% current page, no automatic page break.
		2902	\balancecolumns
		2903	%
		2904	% If we end up splitting too much material for the current page,
		2905	% though, there will be another page break right after this \output
		2906	% invocation ends. Having called \balancecolumns once, we do not
		2907	% want to call it again. Therefore, reset \output to its normal
		2908	% definition right away. (We hope \balancecolumns will never be
		2909	% called on to balance too much material, but if it is, this makes
		2910	% the output somewhat more palatable.)
		2911	\global\output = {\onepageout{\pagecontents\PAGE}}%
		2912	}%
		2913	\eject
		2914	\endgroup % started in \begindoublecolumns
		2915	%
		2916	% \pagegoal was set to the doubled \vsize above, since we restarted
		2917	% the current page. We're now back to normal single-column
		2918	% typesetting, so reset \pagegoal to the normal \vsize (after the
		2919	% \endgroup where \vsize got restored).
		2920	\pagegoal = \vsize
		2921	}
		2922	\def\balancecolumns{%
		2923	% Called at the end of the double column material.
		2924	\setbox0 = \vbox{\unvbox255}% like \box255 but more efficient, see p.120.
		2925	\dimen@ = \ht0
		2926	\advance\dimen@ by \topskip
		2927	\advance\dimen@ by-\baselineskip
		2928	\divide\dimen@ by 2 % target to split to
		2929	%debug\message{final 2-column material height=\the\ht0, target=\the\dimen@.}%
		2930	\splittopskip = \topskip
		2931	% Loop until we get a decent breakpoint.
		2932	{%
		2933	\vbadness = 10000
		2934	\loop
		2935	\global\setbox3 = \copy0
		2936	\global\setbox1 = \vsplit3 to \dimen@
		2937	\ifdim\ht3>\dimen@
		2938	\global\advance\dimen@ by 1pt
		2939	\repeat
		2940	}%
		2941	%debug\message{split to \the\dimen@, column heights: \the\ht1, \the\ht3.}%
		2942	\setbox0=\vbox to\dimen@{\unvbox1}%
		2943	\setbox2=\vbox to\dimen@{\unvbox3}%
		2944	%
		2945	\pagesofar
		2946	}
		2947	\catcode`\@ = \other
		2948
		2949
		2950	\message{sectioning,}
		2951	% Define chapters, sections, etc.
		2952
		2953	\newcount\chapno
		2954	\newcount\secno \secno=0
		2955	\newcount\subsecno \subsecno=0
		2956	\newcount\subsubsecno \subsubsecno=0
		2957
		2958	% This counter is funny since it counts through charcodes of letters A, B, ...
		2959	\newcount\appendixno \appendixno = `\@
		2960	\def\appendixletter{\char\the\appendixno}
		2961
		2962	% Each @chapter defines this as the name of the chapter.
		2963	% page headings and footings can use it. @section does likewise.
		2964	\def\thischapter{}
		2965	\def\thissection{}
		2966
		2967	\newcount\absseclevel % used to calculate proper heading level
		2968	\newcount\secbase\secbase=0 % @raise/lowersections modify this count
		2969
		2970	% @raisesections: treat @section as chapter, @subsection as section, etc.
		2971	\def\raisesections{\global\advance\secbase by -1}
		2972	\let\up=\raisesections % original BFox name
		2973
		2974	% @lowersections: treat @chapter as section, @section as subsection, etc.
		2975	\def\lowersections{\global\advance\secbase by 1}
		2976	\let\down=\lowersections % original BFox name
		2977
		2978	% Choose a numbered-heading macro
		2979	% #1 is heading level if unmodified by @raisesections or @lowersections
		2980	% #2 is text for heading
		2981	\def\numhead#1#2{\absseclevel=\secbase\advance\absseclevel by #1
		2982	\ifcase\absseclevel
		2983	\chapterzzz{#2}
		2984	\or
		2985	\seczzz{#2}
		2986	\or
		2987	\numberedsubseczzz{#2}
		2988	\or
		2989	\numberedsubsubseczzz{#2}
		2990	\else
		2991	\ifnum \absseclevel<0
		2992	\chapterzzz{#2}
		2993	\else
		2994	\numberedsubsubseczzz{#2}
		2995	\fi
		2996	\fi
		2997	}
		2998
		2999	% like \numhead, but chooses appendix heading levels
		3000	\def\apphead#1#2{\absseclevel=\secbase\advance\absseclevel by #1
		3001	\ifcase\absseclevel
		3002	\appendixzzz{#2}
		3003	\or
		3004	\appendixsectionzzz{#2}
		3005	\or
		3006	\appendixsubseczzz{#2}
		3007	\or
		3008	\appendixsubsubseczzz{#2}
		3009	\else
		3010	\ifnum \absseclevel<0
		3011	\appendixzzz{#2}
		3012	\else
		3013	\appendixsubsubseczzz{#2}
		3014	\fi
		3015	\fi
		3016	}
		3017
		3018	% like \numhead, but chooses numberless heading levels
		3019	\def\unnmhead#1#2{\absseclevel=\secbase\advance\absseclevel by #1
		3020	\ifcase\absseclevel
		3021	\unnumberedzzz{#2}
		3022	\or
		3023	\unnumberedseczzz{#2}
		3024	\or
		3025	\unnumberedsubseczzz{#2}
		3026	\or
		3027	\unnumberedsubsubseczzz{#2}
		3028	\else
		3029	\ifnum \absseclevel<0
		3030	\unnumberedzzz{#2}
		3031	\else
		3032	\unnumberedsubsubseczzz{#2}
		3033	\fi
		3034	\fi
		3035	}
		3036
		3037	% @chapter, @appendix, @unnumbered.
		3038	\def\thischaptername{No Chapter Title}
		3039	\outer\def\chapter{\parsearg\chapteryyy}
		3040	\def\chapteryyy #1{\numhead0{#1}} % normally numhead0 calls chapterzzz
		3041	\def\chapterzzz #1{%
		3042	\secno=0 \subsecno=0 \subsubsecno=0
		3043	\global\advance \chapno by 1 \message{\putwordChapter\space \the\chapno}%
		3044	\chapmacro {#1}{\the\chapno}%
		3045	\gdef\thissection{#1}%
		3046	\gdef\thischaptername{#1}%
		3047	% We don't substitute the actual chapter name into \thischapter
		3048	% because we don't want its macros evaluated now.
		3049	\xdef\thischapter{\putwordChapter{} \the\chapno: \noexpand\thischaptername}%
		3050	\toks0 = {#1}%
		3051	\edef\temp{\noexpand\writetocentry{\realbackslash chapentry{\the\toks0}%
		3052	{\the\chapno}}}%
		3053	\temp
		3054	\donoderef
		3055	\global\let\section = \numberedsec
		3056	\global\let\subsection = \numberedsubsec
		3057	\global\let\subsubsection = \numberedsubsubsec
		3058	}
		3059
		3060	\outer\def\appendix{\parsearg\appendixyyy}
		3061	\def\appendixyyy #1{\apphead0{#1}} % normally apphead0 calls appendixzzz
		3062	\def\appendixzzz #1{%
		3063	\secno=0 \subsecno=0 \subsubsecno=0
		3064	\global\advance \appendixno by 1
		3065	\message{\putwordAppendix\space \appendixletter}%
		3066	\chapmacro {#1}{\putwordAppendix{} \appendixletter}%
		3067	\gdef\thissection{#1}%
		3068	\gdef\thischaptername{#1}%
		3069	\xdef\thischapter{\putwordAppendix{} \appendixletter: \noexpand\thischaptername}%
		3070	\toks0 = {#1}%
		3071	\edef\temp{\noexpand\writetocentry{\realbackslash chapentry{\the\toks0}%
		3072	{\putwordAppendix{} \appendixletter}}}%
		3073	\temp
		3074	\appendixnoderef
		3075	\global\let\section = \appendixsec
		3076	\global\let\subsection = \appendixsubsec
		3077	\global\let\subsubsection = \appendixsubsubsec
		3078	}
		3079
		3080	% @centerchap is like @unnumbered, but the heading is centered.
		3081	\outer\def\centerchap{\parsearg\centerchapyyy}
		3082	\def\centerchapyyy #1{{\let\unnumbchapmacro=\centerchapmacro \unnumberedyyy{#1}}}
		3083
		3084	% @top is like @unnumbered.
		3085	\outer\def\top{\parsearg\unnumberedyyy}
		3086
		3087	\outer\def\unnumbered{\parsearg\unnumberedyyy}
		3088	\def\unnumberedyyy #1{\unnmhead0{#1}} % normally unnmhead0 calls unnumberedzzz
		3089	\def\unnumberedzzz #1{%
		3090	\secno=0 \subsecno=0 \subsubsecno=0
		3091	%
		3092	% This used to be simply \message{#1}, but TeX fully expands the
		3093	% argument to \message. Therefore, if #1 contained @-commands, TeX
		3094	% expanded them. For example, in `@unnumbered The @cite{Book}', TeX
		3095	% expanded @cite (which turns out to cause errors because \cite is meant
		3096	% to be executed, not expanded).
		3097	%
		3098	% Anyway, we don't want the fully-expanded definition of @cite to appear
		3099	% as a result of the \message, we just want `@cite' itself. We use
		3100	% \the<toks register> to achieve this: TeX expands \the<toks> only once,
		3101	% simply yielding the contents of <toks register>. (We also do this for
		3102	% the toc entries.)
		3103	\toks0 = {#1}\message{(\the\toks0)}%
		3104	%
		3105	\unnumbchapmacro {#1}%
		3106	\gdef\thischapter{#1}\gdef\thissection{#1}%
		3107	\toks0 = {#1}%
		3108	\edef\temp{\noexpand\writetocentry{\realbackslash unnumbchapentry{\the\toks0}}}%
		3109	\temp
		3110	\unnumbnoderef
		3111	\global\let\section = \unnumberedsec
		3112	\global\let\subsection = \unnumberedsubsec
		3113	\global\let\subsubsection = \unnumberedsubsubsec
		3114	}
		3115
		3116	% Sections.
		3117	\outer\def\numberedsec{\parsearg\secyyy}
		3118	\def\secyyy #1{\numhead1{#1}} % normally calls seczzz
		3119	\def\seczzz #1{%
		3120	\subsecno=0 \subsubsecno=0 \global\advance \secno by 1 %
		3121	\gdef\thissection{#1}\secheading {#1}{\the\chapno}{\the\secno}%
		3122	\toks0 = {#1}%
		3123	\edef\temp{\noexpand\writetocentry{\realbackslash secentry{\the\toks0}%
		3124	{\the\chapno}{\the\secno}}}%
		3125	\temp
		3126	\donoderef
		3127	\nobreak
		3128	}
		3129
		3130	\outer\def\appendixsection{\parsearg\appendixsecyyy}
		3131	\outer\def\appendixsec{\parsearg\appendixsecyyy}
		3132	\def\appendixsecyyy #1{\apphead1{#1}} % normally calls appendixsectionzzz
		3133	\def\appendixsectionzzz #1{%
		3134	\subsecno=0 \subsubsecno=0 \global\advance \secno by 1 %
		3135	\gdef\thissection{#1}\secheading {#1}{\appendixletter}{\the\secno}%
		3136	\toks0 = {#1}%
		3137	\edef\temp{\noexpand\writetocentry{\realbackslash secentry{\the\toks0}%
		3138	{\appendixletter}{\the\secno}}}%
		3139	\temp
		3140	\appendixnoderef
		3141	\nobreak
		3142	}
		3143
		3144	\outer\def\unnumberedsec{\parsearg\unnumberedsecyyy}
		3145	\def\unnumberedsecyyy #1{\unnmhead1{#1}} % normally calls unnumberedseczzz
		3146	\def\unnumberedseczzz #1{%
		3147	\plainsecheading {#1}\gdef\thissection{#1}%
		3148	\toks0 = {#1}%
		3149	\edef\temp{\noexpand\writetocentry{\realbackslash unnumbsecentry{\the\toks0}}}%
		3150	\temp
		3151	\unnumbnoderef
		3152	\nobreak
		3153	}
		3154
		3155	% Subsections.
		3156	\outer\def\numberedsubsec{\parsearg\numberedsubsecyyy}
		3157	\def\numberedsubsecyyy #1{\numhead2{#1}} % normally calls numberedsubseczzz
		3158	\def\numberedsubseczzz #1{%
		3159	\gdef\thissection{#1}\subsubsecno=0 \global\advance \subsecno by 1 %
		3160	\subsecheading {#1}{\the\chapno}{\the\secno}{\the\subsecno}%
		3161	\toks0 = {#1}%
		3162	\edef\temp{\noexpand\writetocentry{\realbackslash subsecentry{\the\toks0}%
		3163	{\the\chapno}{\the\secno}{\the\subsecno}}}%
		3164	\temp
		3165	\donoderef
		3166	\nobreak
		3167	}
		3168
		3169	\outer\def\appendixsubsec{\parsearg\appendixsubsecyyy}
		3170	\def\appendixsubsecyyy #1{\apphead2{#1}} % normally calls appendixsubseczzz
		3171	\def\appendixsubseczzz #1{%
		3172	\gdef\thissection{#1}\subsubsecno=0 \global\advance \subsecno by 1 %
		3173	\subsecheading {#1}{\appendixletter}{\the\secno}{\the\subsecno}%
		3174	\toks0 = {#1}%
		3175	\edef\temp{\noexpand\writetocentry{\realbackslash subsecentry{\the\toks0}%
		3176	{\appendixletter}{\the\secno}{\the\subsecno}}}%
		3177	\temp
		3178	\appendixnoderef
		3179	\nobreak
		3180	}
		3181
		3182	\outer\def\unnumberedsubsec{\parsearg\unnumberedsubsecyyy}
		3183	\def\unnumberedsubsecyyy #1{\unnmhead2{#1}} %normally calls unnumberedsubseczzz
		3184	\def\unnumberedsubseczzz #1{%
		3185	\plainsubsecheading {#1}\gdef\thissection{#1}%
		3186	\toks0 = {#1}%
		3187	\edef\temp{\noexpand\writetocentry{\realbackslash unnumbsubsecentry%
		3188	{\the\toks0}}}%
		3189	\temp
		3190	\unnumbnoderef
		3191	\nobreak
		3192	}
		3193
		3194	% Subsubsections.
		3195	\outer\def\numberedsubsubsec{\parsearg\numberedsubsubsecyyy}
		3196	\def\numberedsubsubsecyyy #1{\numhead3{#1}} % normally numberedsubsubseczzz
		3197	\def\numberedsubsubseczzz #1{%
		3198	\gdef\thissection{#1}\global\advance \subsubsecno by 1 %
		3199	\subsubsecheading {#1}
		3200	{\the\chapno}{\the\secno}{\the\subsecno}{\the\subsubsecno}%
		3201	\toks0 = {#1}%
		3202	\edef\temp{\noexpand\writetocentry{\realbackslash subsubsecentry{\the\toks0}%
		3203	{\the\chapno}{\the\secno}{\the\subsecno}{\the\subsubsecno}}}%
		3204	\temp
		3205	\donoderef
		3206	\nobreak
		3207	}
		3208
		3209	\outer\def\appendixsubsubsec{\parsearg\appendixsubsubsecyyy}
		3210	\def\appendixsubsubsecyyy #1{\apphead3{#1}} % normally appendixsubsubseczzz
		3211	\def\appendixsubsubseczzz #1{%
		3212	\gdef\thissection{#1}\global\advance \subsubsecno by 1 %
		3213	\subsubsecheading {#1}
		3214	{\appendixletter}{\the\secno}{\the\subsecno}{\the\subsubsecno}%
		3215	\toks0 = {#1}%
		3216	\edef\temp{\noexpand\writetocentry{\realbackslash subsubsecentry{\the\toks0}%
		3217	{\appendixletter}{\the\secno}{\the\subsecno}{\the\subsubsecno}}}%
		3218	\temp
		3219	\appendixnoderef
		3220	\nobreak
		3221	}
		3222
		3223	\outer\def\unnumberedsubsubsec{\parsearg\unnumberedsubsubsecyyy}
		3224	\def\unnumberedsubsubsecyyy #1{\unnmhead3{#1}} %normally unnumberedsubsubseczzz
		3225	\def\unnumberedsubsubseczzz #1{%
		3226	\plainsubsubsecheading {#1}\gdef\thissection{#1}%
		3227	\toks0 = {#1}%
		3228	\edef\temp{\noexpand\writetocentry{\realbackslash unnumbsubsubsecentry%
		3229	{\the\toks0}}}%
		3230	\temp
		3231	\unnumbnoderef
		3232	\nobreak
		3233	}
		3234
		3235	% These are variants which are not "outer", so they can appear in @ifinfo.
		3236	% Actually, they should now be obsolete; ordinary section commands should work.
		3237	\def\infotop{\parsearg\unnumberedzzz}
		3238	\def\infounnumbered{\parsearg\unnumberedzzz}
		3239	\def\infounnumberedsec{\parsearg\unnumberedseczzz}
		3240	\def\infounnumberedsubsec{\parsearg\unnumberedsubseczzz}
		3241	\def\infounnumberedsubsubsec{\parsearg\unnumberedsubsubseczzz}
		3242
		3243	\def\infoappendix{\parsearg\appendixzzz}
		3244	\def\infoappendixsec{\parsearg\appendixseczzz}
		3245	\def\infoappendixsubsec{\parsearg\appendixsubseczzz}
		3246	\def\infoappendixsubsubsec{\parsearg\appendixsubsubseczzz}
		3247
		3248	\def\infochapter{\parsearg\chapterzzz}
		3249	\def\infosection{\parsearg\sectionzzz}
		3250	\def\infosubsection{\parsearg\subsectionzzz}
		3251	\def\infosubsubsection{\parsearg\subsubsectionzzz}
		3252
		3253	% These macros control what the section commands do, according
		3254	% to what kind of chapter we are in (ordinary, appendix, or unnumbered).
		3255	% Define them by default for a numbered chapter.
		3256	\global\let\section = \numberedsec
		3257	\global\let\subsection = \numberedsubsec
		3258	\global\let\subsubsection = \numberedsubsubsec
		3259
		3260	% Define @majorheading, @heading and @subheading
		3261
		3262	% NOTE on use of \vbox for chapter headings, section headings, and such:
		3263	% 1) We use \vbox rather than the earlier \line to permit
		3264	% overlong headings to fold.
		3265	% 2) \hyphenpenalty is set to 10000 because hyphenation in a
		3266	% heading is obnoxious; this forbids it.
		3267	% 3) Likewise, headings look best if no \parindent is used, and
		3268	% if justification is not attempted. Hence \raggedright.
		3269
		3270
		3271	\def\majorheading{\parsearg\majorheadingzzz}
		3272	\def\majorheadingzzz #1{%
		3273	{\advance\chapheadingskip by 10pt \chapbreak }%
		3274	{\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
		3275	\parindent=0pt\raggedright
		3276	\rm #1\hfill}}\bigskip \par\penalty 200}
		3277
		3278	\def\chapheading{\parsearg\chapheadingzzz}
		3279	\def\chapheadingzzz #1{\chapbreak %
		3280	{\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
		3281	\parindent=0pt\raggedright
		3282	\rm #1\hfill}}\bigskip \par\penalty 200}
		3283
		3284	% @heading, @subheading, @subsubheading.
		3285	\def\heading{\parsearg\plainsecheading}
		3286	\def\subheading{\parsearg\plainsubsecheading}
		3287	\def\subsubheading{\parsearg\plainsubsubsecheading}
		3288
		3289	% These macros generate a chapter, section, etc. heading only
		3290	% (including whitespace, linebreaking, etc. around it),
		3291	% given all the information in convenient, parsed form.
		3292
		3293	%%% Args are the skip and penalty (usually negative)
		3294	\def\dobreak#1#2{\par\ifdim\lastskip<#1\removelastskip\penalty#2\vskip#1\fi}
		3295
		3296	\def\setchapterstyle #1 {\csname CHAPF#1\endcsname}
		3297
		3298	%%% Define plain chapter starts, and page on/off switching for it
		3299	% Parameter controlling skip before chapter headings (if needed)
		3300
		3301	\newskip\chapheadingskip
		3302
		3303	\def\chapbreak{\dobreak \chapheadingskip {-4000}}
		3304	\def\chappager{\par\vfill\supereject}
		3305	\def\chapoddpage{\chappager \ifodd\pageno \else \hbox to 0pt{} \chappager\fi}
		3306
		3307	\def\setchapternewpage #1 {\csname CHAPPAG#1\endcsname}
		3308
		3309	\def\CHAPPAGoff{%
		3310	\global\let\contentsalignmacro = \chappager
		3311	\global\let\pchapsepmacro=\chapbreak
		3312	\global\let\pagealignmacro=\chappager}
		3313
		3314	\def\CHAPPAGon{%
		3315	\global\let\contentsalignmacro = \chappager
		3316	\global\let\pchapsepmacro=\chappager
		3317	\global\let\pagealignmacro=\chappager
		3318	\global\def\HEADINGSon{\HEADINGSsingle}}
		3319
		3320	\def\CHAPPAGodd{
		3321	\global\let\contentsalignmacro = \chapoddpage
		3322	\global\let\pchapsepmacro=\chapoddpage
		3323	\global\let\pagealignmacro=\chapoddpage
		3324	\global\def\HEADINGSon{\HEADINGSdouble}}
		3325
		3326	\CHAPPAGon
		3327
		3328	\def\CHAPFplain{
		3329	\global\let\chapmacro=\chfplain
		3330	\global\let\unnumbchapmacro=\unnchfplain
		3331	\global\let\centerchapmacro=\centerchfplain}
		3332
		3333	% Plain chapter opening.
		3334	% #1 is the text, #2 the chapter number or empty if unnumbered.
		3335	\def\chfplain#1#2{%
		3336	\pchapsepmacro
		3337	{%
		3338	\chapfonts \rm
		3339	\def\chapnum{#2}%
		3340	\setbox0 = \hbox{#2\ifx\chapnum\empty\else\enspace\fi}%
		3341	\vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \raggedright
		3342	\hangindent = \wd0 \centerparametersmaybe
		3343	\unhbox0 #1\par}%
		3344	}%
		3345	\nobreak\bigskip % no page break after a chapter title
		3346	\nobreak
		3347	}
		3348
		3349	% Plain opening for unnumbered.
		3350	\def\unnchfplain#1{\chfplain{#1}{}}
		3351
		3352	% @centerchap -- centered and unnumbered.
		3353	\let\centerparametersmaybe = \relax
		3354	\def\centerchfplain#1{{%
		3355	\def\centerparametersmaybe{%
		3356	\advance\rightskip by 3\rightskip
		3357	\leftskip = \rightskip
		3358	\parfillskip = 0pt
		3359	}%
		3360	\chfplain{#1}{}%
		3361	}}
		3362
		3363	\CHAPFplain % The default
		3364
		3365	\def\unnchfopen #1{%
		3366	\chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
		3367	\parindent=0pt\raggedright
		3368	\rm #1\hfill}}\bigskip \par\nobreak
		3369	}
		3370
		3371	\def\chfopen #1#2{\chapoddpage {\chapfonts
		3372	\vbox to 3in{\vfil \hbox to\hsize{\hfil #2} \hbox to\hsize{\hfil #1} \vfil}}%
		3373	\par\penalty 5000 %
		3374	}
		3375
		3376	\def\centerchfopen #1{%
		3377	\chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
		3378	\parindent=0pt
		3379	\hfill {\rm #1}\hfill}}\bigskip \par\nobreak
		3380	}
		3381
		3382	\def\CHAPFopen{
		3383	\global\let\chapmacro=\chfopen
		3384	\global\let\unnumbchapmacro=\unnchfopen
		3385	\global\let\centerchapmacro=\centerchfopen}
		3386
		3387
		3388	% Section titles.
		3389	\newskip\secheadingskip
		3390	\def\secheadingbreak{\dobreak \secheadingskip {-1000}}
		3391	\def\secheading#1#2#3{\sectionheading{sec}{#2.#3}{#1}}
		3392	\def\plainsecheading#1{\sectionheading{sec}{}{#1}}
		3393
		3394	% Subsection titles.
		3395	\newskip \subsecheadingskip
		3396	\def\subsecheadingbreak{\dobreak \subsecheadingskip {-500}}
		3397	\def\subsecheading#1#2#3#4{\sectionheading{subsec}{#2.#3.#4}{#1}}
		3398	\def\plainsubsecheading#1{\sectionheading{subsec}{}{#1}}
		3399
		3400	% Subsubsection titles.
		3401	\let\subsubsecheadingskip = \subsecheadingskip
		3402	\let\subsubsecheadingbreak = \subsecheadingbreak
		3403	\def\subsubsecheading#1#2#3#4#5{\sectionheading{subsubsec}{#2.#3.#4.#5}{#1}}
		3404	\def\plainsubsubsecheading#1{\sectionheading{subsubsec}{}{#1}}
		3405
		3406
		3407	% Print any size section title.
		3408	%
		3409	% #1 is the section type (sec/subsec/subsubsec), #2 is the section
		3410	% number (maybe empty), #3 the text.
		3411	\def\sectionheading#1#2#3{%
		3412	{%
		3413	\expandafter\advance\csname #1headingskip\endcsname by \parskip
		3414	\csname #1headingbreak\endcsname
		3415	}%
		3416	{%
		3417	% Switch to the right set of fonts.
		3418	\csname #1fonts\endcsname \rm
		3419	%
		3420	% Only insert the separating space if we have a section number.
		3421	\def\secnum{#2}%
		3422	\setbox0 = \hbox{#2\ifx\secnum\empty\else\enspace\fi}%
		3423	%
		3424	\vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \raggedright
		3425	\hangindent = \wd0 % zero if no section number
		3426	\unhbox0 #3}%
		3427	}%
		3428	\ifdim\parskip<10pt \nobreak\kern10pt\nobreak\kern-\parskip\fi \nobreak
		3429	}
		3430
		3431
		3432	\message{toc,}
		3433	\newwrite\tocfile
		3434
		3435	% Write an entry to the toc file, opening it if necessary.
		3436	% Called from @chapter, etc. We supply {\folio} at the end of the
		3437	% argument, which will end up as the last argument to the \...entry macro.
		3438	%
		3439	% We open the .toc file here instead of at @setfilename or any other
		3440	% given time so that @contents can be put in the document anywhere.
		3441	%
		3442	\newif\iftocfileopened
		3443	\def\writetocentry#1{%
		3444	\iftocfileopened\else
		3445	\immediate\openout\tocfile = \jobname.toc
		3446	\global\tocfileopenedtrue
		3447	\fi
		3448	\iflinks \write\tocfile{#1{\folio}}\fi
		3449	}
		3450
		3451	\newskip\contentsrightmargin \contentsrightmargin=1in
		3452	\newcount\savepageno
		3453	\newcount\lastnegativepageno \lastnegativepageno = -1
		3454
		3455	% Finish up the main text and prepare to read what we've written
		3456	% to \tocfile.
		3457	%
		3458	\def\startcontents#1{%
		3459	% If @setchapternewpage on, and @headings double, the contents should
		3460	% start on an odd page, unlike chapters. Thus, we maintain
		3461	% \contentsalignmacro in parallel with \pagealignmacro.
		3462	% From: Torbjorn Granlund <tege@matematik.su.se>
		3463	\contentsalignmacro
		3464	\immediate\closeout\tocfile
		3465	%
		3466	% Don't need to put `Contents' or `Short Contents' in the headline.
		3467	% It is abundantly clear what they are.
		3468	\unnumbchapmacro{#1}\def\thischapter{}%
		3469	\savepageno = \pageno
		3470	\begingroup % Set up to handle contents files properly.
		3471	\catcode`\\=0 \catcode`\{=1 \catcode`\}=2 \catcode`\@=11
		3472	% We can't do this, because then an actual ^ in a section
		3473	% title fails, e.g., @chapter ^ -- exponentiation. --karl, 9jul97.
		3474	%\catcode`\^=7 % to see ^^e4 as \"a etc. juha@piuha.ydi.vtt.fi
		3475	\raggedbottom % Worry more about breakpoints than the bottom.
		3476	\advance\hsize by -\contentsrightmargin % Don't use the full line length.
		3477	%
		3478	% Roman numerals for page numbers.
		3479	\ifnum \pageno>0 \pageno = \lastnegativepageno \fi
		3480	}
		3481
		3482
		3483	% Normal (long) toc.
		3484	\def\contents{%
		3485	\startcontents{\putwordTableofContents}%
		3486	\openin 1 \jobname.toc
		3487	\ifeof 1 \else
		3488	\closein 1
		3489	\input \jobname.toc
		3490	\fi
		3491	\vfill \eject
		3492	\endgroup
		3493	\lastnegativepageno = \pageno
		3494	\pageno = \savepageno
		3495	}
		3496
		3497	% And just the chapters.
		3498	\def\summarycontents{%
		3499	\startcontents{\putwordShortContents}%
		3500	%
		3501	\let\chapentry = \shortchapentry
		3502	\let\unnumbchapentry = \shortunnumberedentry
		3503	% We want a true roman here for the page numbers.
		3504	\secfonts
		3505	\let\rm=\shortcontrm \let\bf=\shortcontbf \let\sl=\shortcontsl
		3506	\rm
		3507	\hyphenpenalty = 10000
		3508	\advance\baselineskip by 1pt % Open it up a little.
		3509	\def\secentry ##1##2##3##4{}
		3510	\def\unnumbsecentry ##1##2{}
		3511	\def\subsecentry ##1##2##3##4##5{}
		3512	\def\unnumbsubsecentry ##1##2{}
		3513	\def\subsubsecentry ##1##2##3##4##5##6{}
		3514	\def\unnumbsubsubsecentry ##1##2{}
		3515	\openin 1 \jobname.toc
		3516	\ifeof 1 \else
		3517	\closein 1
		3518	\input \jobname.toc
		3519	\fi
		3520	\vfill \eject
		3521	\endgroup
		3522	\lastnegativepageno = \pageno
		3523	\pageno = \savepageno
		3524	}
		3525	\let\shortcontents = \summarycontents
		3526
		3527	% These macros generate individual entries in the table of contents.
		3528	% The first argument is the chapter or section name.
		3529	% The last argument is the page number.
		3530	% The arguments in between are the chapter number, section number, ...
		3531
		3532	% Chapter-level things, for both the long and short contents.
		3533	\def\chapentry#1#2#3{\dochapentry{#2\labelspace#1}{#3}}
		3534
		3535	% See comments in \dochapentry re vbox and related settings
		3536	\def\shortchapentry#1#2#3{%
		3537	\tocentry{\shortchaplabel{#2}\labelspace #1}{\doshortpageno{#3}}%
		3538	}
		3539
		3540	% Typeset the label for a chapter or appendix for the short contents.
		3541	% The arg is, e.g. `Appendix A' for an appendix, or `3' for a chapter.
		3542	% We could simplify the code here by writing out an \appendixentry
		3543	% command in the toc file for appendices, instead of using \chapentry
		3544	% for both, but it doesn't seem worth it.
		3545	\setbox0 = \hbox{\shortcontrm \putwordAppendix }
		3546	\newdimen\shortappendixwidth \shortappendixwidth = \wd0
		3547
		3548	\def\shortchaplabel#1{%
		3549	% We typeset #1 in a box of constant width, regardless of the text of
		3550	% #1, so the chapter titles will come out aligned.
		3551	\setbox0 = \hbox{#1}%
		3552	\dimen0 = \ifdim\wd0 > \shortappendixwidth \shortappendixwidth \else 0pt \fi
		3553	%
		3554	% This space should be plenty, since a single number is .5em, and the
		3555	% widest letter (M) is 1em, at least in the Computer Modern fonts.
		3556	% (This space doesn't include the extra space that gets added after
		3557	% the label; that gets put in by \shortchapentry above.)
		3558	\advance\dimen0 by 1.1em
		3559	\hbox to \dimen0{#1\hfil}%
		3560	}
		3561
		3562	\def\unnumbchapentry#1#2{\dochapentry{#1}{#2}}
		3563	\def\shortunnumberedentry#1#2{\tocentry{#1}{\doshortpageno{#2}}}
		3564
		3565	% Sections.
		3566	\def\secentry#1#2#3#4{\dosecentry{#2.#3\labelspace#1}{#4}}
		3567	\def\unnumbsecentry#1#2{\dosecentry{#1}{#2}}
		3568
		3569	% Subsections.
		3570	\def\subsecentry#1#2#3#4#5{\dosubsecentry{#2.#3.#4\labelspace#1}{#5}}
		3571	\def\unnumbsubsecentry#1#2{\dosubsecentry{#1}{#2}}
		3572
		3573	% And subsubsections.
		3574	\def\subsubsecentry#1#2#3#4#5#6{%
		3575	\dosubsubsecentry{#2.#3.#4.#5\labelspace#1}{#6}}
		3576	\def\unnumbsubsubsecentry#1#2{\dosubsubsecentry{#1}{#2}}
		3577
		3578	% This parameter controls the indentation of the various levels.
		3579	\newdimen\tocindent \tocindent = 3pc
		3580
		3581	% Now for the actual typesetting. In all these, #1 is the text and #2 is the
		3582	% page number.
		3583	%
		3584	% If the toc has to be broken over pages, we want it to be at chapters
		3585	% if at all possible; hence the \penalty.
		3586	\def\dochapentry#1#2{%
		3587	\penalty-300 \vskip1\baselineskip plus.33\baselineskip minus.25\baselineskip
		3588	\begingroup
		3589	\chapentryfonts
		3590	\tocentry{#1}{\dopageno{#2}}%
		3591	\endgroup
		3592	\nobreak\vskip .25\baselineskip plus.1\baselineskip
		3593	}
		3594
		3595	\def\dosecentry#1#2{\begingroup
		3596	\secentryfonts \leftskip=\tocindent
		3597	\tocentry{#1}{\dopageno{#2}}%
		3598	\endgroup}
		3599
		3600	\def\dosubsecentry#1#2{\begingroup
		3601	\subsecentryfonts \leftskip=2\tocindent
		3602	\tocentry{#1}{\dopageno{#2}}%
		3603	\endgroup}
		3604
		3605	\def\dosubsubsecentry#1#2{\begingroup
		3606	\subsubsecentryfonts \leftskip=3\tocindent
		3607	\tocentry{#1}{\dopageno{#2}}%
		3608	\endgroup}
		3609
		3610	% Final typesetting of a toc entry; we use the same \entry macro as for
		3611	% the index entries, but we want to suppress hyphenation here. (We
		3612	% can't do that in the \entry macro, since index entries might consist
		3613	% of hyphenated-identifiers-that-do-not-fit-on-a-line-and-nothing-else.)
		3614	\def\tocentry#1#2{\begingroup
		3615	\vskip 0pt plus1pt % allow a little stretch for the sake of nice page breaks
		3616	% Do not use \turnoffactive in these arguments. Since the toc is
		3617	% typeset in cmr, so characters such as _ would come out wrong; we
		3618	% have to do the usual translation tricks.
		3619	\entry{#1}{#2}%
		3620	\endgroup}
		3621
		3622	% Space between chapter (or whatever) number and the title.
		3623	\def\labelspace{\hskip1em \relax}
		3624
		3625	\def\dopageno#1{{\rm #1}}
		3626	\def\doshortpageno#1{{\rm #1}}
		3627
		3628	\def\chapentryfonts{\secfonts \rm}
		3629	\def\secentryfonts{\textfonts}
		3630	\let\subsecentryfonts = \textfonts
		3631	\let\subsubsecentryfonts = \textfonts
		3632
		3633
		3634	\message{environments,}
		3635
		3636	% Since these characters are used in examples, it should be an even number of
		3637	% \tt widths. Each \tt character is 1en, so two makes it 1em.
		3638	% Furthermore, these definitions must come after we define our fonts.
		3639	\newbox\dblarrowbox \newbox\longdblarrowbox
		3640	\newbox\pushcharbox \newbox\bullbox
		3641	\newbox\equivbox \newbox\errorbox
		3642
		3643	%{\tentt
		3644	%\global\setbox\dblarrowbox = \hbox to 1em{\hfil$\Rightarrow$\hfil}
		3645	%\global\setbox\longdblarrowbox = \hbox to 1em{\hfil$\mapsto$\hfil}
		3646	%\global\setbox\pushcharbox = \hbox to 1em{\hfil$\dashv$\hfil}
		3647	%\global\setbox\equivbox = \hbox to 1em{\hfil$\ptexequiv$\hfil}
		3648	% Adapted from the manmac format (p.420 of TeXbook)
		3649	%\global\setbox\bullbox = \hbox to 1em{\kern.15em\vrule height .75ex width .85ex
		3650	% depth .1ex\hfil}
		3651	%}
		3652
		3653	% @point{}, @result{}, @expansion{}, @print{}, @equiv{}.
		3654	\def\point{$\star$}
		3655	\def\result{\leavevmode\raise.15ex\hbox to 1em{\hfil$\Rightarrow$\hfil}}
		3656	\def\expansion{\leavevmode\raise.1ex\hbox to 1em{\hfil$\mapsto$\hfil}}
		3657	\def\print{\leavevmode\lower.1ex\hbox to 1em{\hfil$\dashv$\hfil}}
		3658	\def\equiv{\leavevmode\lower.1ex\hbox to 1em{\hfil$\ptexequiv$\hfil}}
		3659
		3660	% Adapted from the TeXbook's \boxit.
		3661	{\tentt \global\dimen0 = 3em}% Width of the box.
		3662	\dimen2 = .55pt % Thickness of rules
		3663	% The text. (`r' is open on the right, `e' somewhat less so on the left.)
		3664	\setbox0 = \hbox{\kern-.75pt \tensf error\kern-1.5pt}
		3665
		3666	\global\setbox\errorbox=\hbox to \dimen0{\hfil
		3667	\hsize = \dimen0 \advance\hsize by -5.8pt % Space to left+right.
		3668	\advance\hsize by -2\dimen2 % Rules.
		3669	\vbox{
		3670	\hrule height\dimen2
		3671	\hbox{\vrule width\dimen2 \kern3pt % Space to left of text.
		3672	\vtop{\kern2.4pt \box0 \kern2.4pt}% Space above/below.
		3673	\kern3pt\vrule width\dimen2}% Space to right.
		3674	\hrule height\dimen2}
		3675	\hfil}
		3676
		3677	% The @error{} command.
		3678	\def\error{\leavevmode\lower.7ex\copy\errorbox}
		3679
		3680	% @tex ... @end tex escapes into raw Tex temporarily.
		3681	% One exception: @ is still an escape character, so that @end tex works.
		3682	% But \@ or @@ will get a plain tex @ character.
		3683
		3684	\def\tex{\begingroup
		3685	\catcode `\\=0 \catcode `\{=1 \catcode `\}=2
		3686	\catcode `\$=3 \catcode `\&=4 \catcode `\#=6
		3687	\catcode `\^=7 \catcode `\_=8 \catcode `\~=13 \let~=\tie
		3688	\catcode `\%=14
		3689	\catcode 43=12 % plus
		3690	\catcode`\"=12
		3691	\catcode`\==12
		3692	\catcode`\\|=12
		3693	\catcode`\<=12
		3694	\catcode`\>=12
		3695	\escapechar=`\\
		3696	%
		3697	\let\b=\ptexb
		3698	\let\bullet=\ptexbullet
		3699	\let\c=\ptexc
		3700	\let\,=\ptexcomma
		3701	\let\.=\ptexdot
		3702	\let\dots=\ptexdots
		3703	\let\equiv=\ptexequiv
		3704	\let\!=\ptexexclam
		3705	\let\i=\ptexi
		3706	\let\{=\ptexlbrace
		3707	\let\+=\tabalign
		3708	\let\}=\ptexrbrace
		3709	\let\*=\ptexstar
		3710	\let\t=\ptext
		3711	%
		3712	\def\endldots{\mathinner{\ldots\ldots\ldots\ldots}}%
		3713	\def\enddots{\relax\ifmmode\endldots\else$\mathsurround=0pt \endldots\,$\fi}%
		3714	\def\@{@}%
		3715	\let\Etex=\endgroup}
		3716
		3717	% Define @lisp ... @endlisp.
		3718	% @lisp does a \begingroup so it can rebind things,
		3719	% including the definition of @endlisp (which normally is erroneous).
		3720
		3721	% Amount to narrow the margins by for @lisp.
		3722	\newskip\lispnarrowing \lispnarrowing=0.4in
		3723
		3724	% This is the definition that ^^M gets inside @lisp, @example, and other
		3725	% such environments. \null is better than a space, since it doesn't
		3726	% have any width.
		3727	\def\lisppar{\null\endgraf}
		3728
		3729	% Make each space character in the input produce a normal interword
		3730	% space in the output. Don't allow a line break at this space, as this
		3731	% is used only in environments like @example, where each line of input
		3732	% should produce a line of output anyway.
		3733	%
		3734	{\obeyspaces %
		3735	\gdef\sepspaces{\obeyspaces\let =\tie}}
		3736
		3737	% Define \obeyedspace to be our active space, whatever it is. This is
		3738	% for use in \parsearg.
		3739	{\sepspaces%
		3740	\global\let\obeyedspace= }
		3741
		3742	% This space is always present above and below environments.
		3743	\newskip\envskipamount \envskipamount = 0pt
		3744
		3745	% Make spacing and below environment symmetrical. We use \parskip here
		3746	% to help in doing that, since in @example-like environments \parskip
		3747	% is reset to zero; thus the \afterenvbreak inserts no space -- but the
		3748	% start of the next paragraph will insert \parskip
		3749	%
		3750	\def\aboveenvbreak{{\advance\envskipamount by \parskip
		3751	\endgraf \ifdim\lastskip<\envskipamount
		3752	\removelastskip \penalty-50 \vskip\envskipamount \fi}}
		3753
		3754	\let\afterenvbreak = \aboveenvbreak
		3755
		3756	% \nonarrowing is a flag. If "set", @lisp etc don't narrow margins.
		3757	\let\nonarrowing=\relax
		3758
		3759	% @cartouche ... @end cartouche: draw rectangle w/rounded corners around
		3760	% environment contents.
		3761	\font\circle=lcircle10
		3762	\newdimen\circthick
		3763	\newdimen\cartouter\newdimen\cartinner
		3764	\newskip\normbskip\newskip\normpskip\newskip\normlskip
		3765	\circthick=\fontdimen8\circle
		3766	%
		3767	\def\ctl{{\circle\char'013\hskip -6pt}}% 6pt from pl file: 1/2charwidth
		3768	\def\ctr{{\hskip 6pt\circle\char'010}}
		3769	\def\cbl{{\circle\char'012\hskip -6pt}}
		3770	\def\cbr{{\hskip 6pt\circle\char'011}}
		3771	\def\carttop{\hbox to \cartouter{\hskip\lskip
		3772	\ctl\leaders\hrule height\circthick\hfil\ctr
		3773	\hskip\rskip}}
		3774	\def\cartbot{\hbox to \cartouter{\hskip\lskip
		3775	\cbl\leaders\hrule height\circthick\hfil\cbr
		3776	\hskip\rskip}}
		3777	%
		3778	\newskip\lskip\newskip\rskip
		3779
		3780	\long\def\cartouche{%
		3781	\begingroup
		3782	\lskip=\leftskip \rskip=\rightskip
		3783	\leftskip=0pt\rightskip=0pt %we want these outside.
		3784	\cartinner=\hsize \advance\cartinner by-\lskip
		3785	\advance\cartinner by-\rskip
		3786	\cartouter=\hsize
		3787	\advance\cartouter by 18.4pt % allow for 3pt kerns on either
		3788	% side, and for 6pt waste from
		3789	% each corner char, and rule thickness
		3790	\normbskip=\baselineskip \normpskip=\parskip \normlskip=\lineskip
		3791	% Flag to tell @lisp, etc., not to narrow margin.
		3792	\let\nonarrowing=\comment
		3793	\vbox\bgroup
		3794	\baselineskip=0pt\parskip=0pt\lineskip=0pt
		3795	\carttop
		3796	\hbox\bgroup
		3797	\hskip\lskip
		3798	\vrule\kern3pt
		3799	\vbox\bgroup
		3800	\hsize=\cartinner
		3801	\kern3pt
		3802	\begingroup
		3803	\baselineskip=\normbskip
		3804	\lineskip=\normlskip
		3805	\parskip=\normpskip
		3806	\vskip -\parskip
		3807	\def\Ecartouche{%
		3808	\endgroup
		3809	\kern3pt
		3810	\egroup
		3811	\kern3pt\vrule
		3812	\hskip\rskip
		3813	\egroup
		3814	\cartbot
		3815	\egroup
		3816	\endgroup
		3817	}}
		3818
		3819
		3820	% This macro is called at the beginning of all the @example variants,
		3821	% inside a group.
		3822	\def\nonfillstart{%
		3823	\aboveenvbreak
		3824	\inENV % This group ends at the end of the body
		3825	\hfuzz = 12pt % Don't be fussy
		3826	\sepspaces % Make spaces be word-separators rather than space tokens.
		3827	\singlespace
		3828	\let\par = \lisppar % don't ignore blank lines
		3829	\obeylines % each line of input is a line of output
		3830	\parskip = 0pt
		3831	\parindent = 0pt
		3832	\emergencystretch = 0pt % don't try to avoid overfull boxes
		3833	% @cartouche defines \nonarrowing to inhibit narrowing
		3834	% at next level down.
		3835	\ifx\nonarrowing\relax
		3836	\advance \leftskip by \lispnarrowing
		3837	\exdentamount=\lispnarrowing
		3838	\let\exdent=\nofillexdent
		3839	\let\nonarrowing=\relax
		3840	\fi
		3841	}
		3842
		3843	% Define the \E... control sequence only if we are inside the particular
		3844	% environment, so the error checking in \end will work.
		3845	%
		3846	% To end an @example-like environment, we first end the paragraph (via
		3847	% \afterenvbreak's vertical glue), and then the group. That way we keep
		3848	% the zero \parskip that the environments set -- \parskip glue will be
		3849	% inserted at the beginning of the next paragraph in the document, after
		3850	% the environment.
		3851	%
		3852	\def\nonfillfinish{\afterenvbreak\endgroup}
		3853
		3854	% @lisp: indented, narrowed, typewriter font.
		3855	\def\lisp{\begingroup
		3856	\nonfillstart
		3857	\let\Elisp = \nonfillfinish
		3858	\tt
		3859	\let\kbdfont = \kbdexamplefont % Allow @kbd to do something special.
		3860	\gobble % eat return
		3861	}
		3862
		3863	% @example: Same as @lisp.
		3864	\def\example{\begingroup \def\Eexample{\nonfillfinish\endgroup}\lisp}
		3865
		3866	% @small... is usually equivalent to the non-small (@smallbook
		3867	% redefines). We must call \example (or whatever) last in the
		3868	% definition, since it reads the return following the @example (or
		3869	% whatever) command.
		3870	%
		3871	% This actually allows (for example) @end display inside an
		3872	% @smalldisplay. Too bad, but makeinfo will catch the error anyway.
		3873	%
		3874	\def\smalldisplay{\begingroup\def\Esmalldisplay{\nonfillfinish\endgroup}\display}
		3875	\def\smallexample{\begingroup\def\Esmallexample{\nonfillfinish\endgroup}\lisp}
		3876	\def\smallformat{\begingroup\def\Esmallformat{\nonfillfinish\endgroup}\format}
		3877	\def\smalllisp{\begingroup\def\Esmalllisp{\nonfillfinish\endgroup}\lisp}
		3878
		3879	% Real @smallexample and @smalllisp (when @smallbook): use smaller fonts.
		3880	% Originally contributed by Pavel@xerox.
		3881	\def\smalllispx{\begingroup
		3882	\def\Esmalllisp{\nonfillfinish\endgroup}%
		3883	\def\Esmallexample{\nonfillfinish\endgroup}%
		3884	\indexfonts
		3885	\lisp
		3886	}
		3887
		3888	% @display: same as @lisp except keep current font.
		3889	%
		3890	\def\display{\begingroup
		3891	\nonfillstart
		3892	\let\Edisplay = \nonfillfinish
		3893	\gobble
		3894	}
		3895
		3896	% @smalldisplay (when @smallbook): @display plus smaller fonts.
		3897	%
		3898	\def\smalldisplayx{\begingroup
		3899	\def\Esmalldisplay{\nonfillfinish\endgroup}%
		3900	\indexfonts \rm
		3901	\display
		3902	}
		3903
		3904	% @format: same as @display except don't narrow margins.
		3905	%
		3906	\def\format{\begingroup
		3907	\let\nonarrowing = t
		3908	\nonfillstart
		3909	\let\Eformat = \nonfillfinish
		3910	\gobble
		3911	}
		3912
		3913	% @smallformat (when @smallbook): @format plus smaller fonts.
		3914	%
		3915	\def\smallformatx{\begingroup
		3916	\def\Esmallformat{\nonfillfinish\endgroup}%
		3917	\indexfonts \rm
		3918	\format
		3919	}
		3920
		3921	% @flushleft (same as @format).
		3922	%
		3923	\def\flushleft{\begingroup \def\Eflushleft{\nonfillfinish\endgroup}\format}
		3924
		3925	% @flushright.
		3926	%
		3927	\def\flushright{\begingroup
		3928	\let\nonarrowing = t
		3929	\nonfillstart
		3930	\let\Eflushright = \nonfillfinish
		3931	\advance\leftskip by 0pt plus 1fill
		3932	\gobble
		3933	}
		3934
		3935	% @quotation does normal linebreaking (hence we can't use \nonfillstart)
		3936	% and narrows the margins.
		3937	%
		3938	\def\quotation{%
		3939	\begingroup\inENV %This group ends at the end of the @quotation body
		3940	{\parskip=0pt \aboveenvbreak}% because \aboveenvbreak inserts \parskip
		3941	\singlespace
		3942	\parindent=0pt
		3943	% We have retained a nonzero parskip for the environment, since we're
		3944	% doing normal filling. So to avoid extra space below the environment...
		3945	\def\Equotation{\parskip = 0pt \nonfillfinish}%
		3946	%
		3947	% @cartouche defines \nonarrowing to inhibit narrowing at next level down.
		3948	\ifx\nonarrowing\relax
		3949	\advance\leftskip by \lispnarrowing
		3950	\advance\rightskip by \lispnarrowing
		3951	\exdentamount = \lispnarrowing
		3952	\let\nonarrowing = \relax
		3953	\fi
		3954	}
		3955
		3956
		3957	\message{defuns,}
		3958	% Define formatter for defuns
		3959	% First, allow user to change definition object font (\df) internally
		3960	\def\setdeffont #1 {\csname DEF#1\endcsname}
		3961
		3962	\newskip\defbodyindent \defbodyindent=.4in
		3963	\newskip\defargsindent \defargsindent=50pt
		3964	\newskip\deftypemargin \deftypemargin=12pt
		3965	\newskip\deflastargmargin \deflastargmargin=18pt
		3966
		3967	\newcount\parencount
		3968	% define \functionparens, which makes ( and ) and & do special things.
		3969	% \functionparens affects the group it is contained in.
		3970	\def\activeparens{%
		3971	\catcode`$=\active \catcode`$=\active \catcode`\&=\active
		3972	\catcode`\[=\active \catcode`\]=\active}
		3973
		3974	% Make control sequences which act like normal parenthesis chars.
		3975	\let\lparen = ( \let\rparen = )
		3976
		3977	{\activeparens % Now, smart parens don't turn on until &foo (see \amprm)
		3978
		3979	% Be sure that we always have a definition for `(', etc. For example,
		3980	% if the fn name has parens in it, \boldbrax will not be in effect yet,
		3981	% so TeX would otherwise complain about undefined control sequence.
		3982	\global\let(=\lparen \global\let)=\rparen
		3983	\global\let[=\lbrack \global\let]=\rbrack
		3984
		3985	\gdef\functionparens{\boldbrax\let&=\amprm\parencount=0 }
		3986	\gdef\boldbrax{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb}
		3987	% This is used to turn on special parens
		3988	% but make & act ordinary (given that it's active).
		3989	\gdef\boldbraxnoamp{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb\let&=\ampnr}
		3990
		3991	% Definitions of (, ) and & used in args for functions.
		3992	% This is the definition of ( outside of all parentheses.
		3993	\gdef\oprm#1 {{\rm\char`\(}#1 \bf \let(=\opnested
		3994	\global\advance\parencount by 1
		3995	}
		3996	%
		3997	% This is the definition of ( when already inside a level of parens.
		3998	\gdef\opnested{\char`\(\global\advance\parencount by 1 }
		3999	%
		4000	\gdef\clrm{% Print a paren in roman if it is taking us back to depth of 0.
		4001	% also in that case restore the outer-level definition of (.
		4002	\ifnum \parencount=1 {\rm \char `\)}\sl \let(=\oprm \else \char `\) \fi
		4003	\global\advance \parencount by -1 }
		4004	% If we encounter &foo, then turn on ()-hacking afterwards
		4005	\gdef\amprm#1 {{\rm\&#1}\let(=\oprm \let)=\clrm\ }
		4006	%
		4007	\gdef\normalparens{\boldbrax\let&=\ampnr}
		4008	} % End of definition inside \activeparens
		4009	%% These parens (in \boldbrax) actually are a little bolder than the
		4010	%% contained text. This is especially needed for [ and ]
		4011	\def\opnr{{\sf\char`\(}\global\advance\parencount by 1 }
		4012	\def\clnr{{\sf\char`\)}\global\advance\parencount by -1 }
		4013	\def\ampnr{\&}
		4014	\def\lbrb{{\bf\char`\[}}
		4015	\def\rbrb{{\bf\char`\]}}
		4016
		4017	% First, defname, which formats the header line itself.
		4018	% #1 should be the function name.
		4019	% #2 should be the type of definition, such as "Function".
		4020
		4021	\def\defname #1#2{%
		4022	% Get the values of \leftskip and \rightskip as they were
		4023	% outside the @def...
		4024	\dimen2=\leftskip
		4025	\advance\dimen2 by -\defbodyindent
		4026	\noindent
		4027	\setbox0=\hbox{\hskip \deflastargmargin{\rm #2}\hskip \deftypemargin}%
		4028	\dimen0=\hsize \advance \dimen0 by -\wd0 % compute size for first line
		4029	\dimen1=\hsize \advance \dimen1 by -\defargsindent %size for continuations
		4030	\parshape 2 0in \dimen0 \defargsindent \dimen1
		4031	% Now output arg 2 ("Function" or some such)
		4032	% ending at \deftypemargin from the right margin,
		4033	% but stuck inside a box of width 0 so it does not interfere with linebreaking
		4034	{% Adjust \hsize to exclude the ambient margins,
		4035	% so that \rightline will obey them.
		4036	\advance \hsize by -\dimen2
		4037	\rlap{\rightline{{\rm #2}\hskip -1.25pc }}}%
		4038	% Make all lines underfull and no complaints:
		4039	\tolerance=10000 \hbadness=10000
		4040	\advance\leftskip by -\defbodyindent
		4041	\exdentamount=\defbodyindent
		4042	{\df #1}\enskip % Generate function name
		4043	}
		4044
		4045	% Actually process the body of a definition
		4046	% #1 should be the terminating control sequence, such as \Edefun.
		4047	% #2 should be the "another name" control sequence, such as \defunx.
		4048	% #3 should be the control sequence that actually processes the header,
		4049	% such as \defunheader.
		4050
		4051	\def\defparsebody #1#2#3{\begingroup\inENV% Environment for definitionbody
		4052	\medbreak %
		4053	% Define the end token that this defining construct specifies
		4054	% so that it will exit this group.
		4055	\def#1{\endgraf\endgroup\medbreak}%
		4056	\def#2{\begingroup\obeylines\activeparens\spacesplit#3}%
		4057	\parindent=0in
		4058	\advance\leftskip by \defbodyindent
		4059	\exdentamount=\defbodyindent
		4060	\begingroup %
		4061	\catcode 61=\active % 61 is `='
		4062	\obeylines\activeparens\spacesplit#3}
		4063
		4064	% #1 is the \E... control sequence to end the definition (which we define).
		4065	% #2 is the \...x control sequence for consecutive fns (which we define).
		4066	% #3 is the control sequence to call to resume processing.
		4067	% #4, delimited by the space, is the class name.
		4068	%
		4069	\def\defmethparsebody#1#2#3#4 {\begingroup\inENV %
		4070	\medbreak %
		4071	% Define the end token that this defining construct specifies
		4072	% so that it will exit this group.
		4073	\def#1{\endgraf\endgroup\medbreak}%
		4074	\def#2##1 {\begingroup\obeylines\activeparens\spacesplit{#3{##1}}}%
		4075	\parindent=0in
		4076	\advance\leftskip by \defbodyindent
		4077	\exdentamount=\defbodyindent
		4078	\begingroup\obeylines\activeparens\spacesplit{#3{#4}}}
		4079
		4080	% @deftypemethod has an extra argument that nothing else does. Sigh.
		4081	% #1 is the \E... control sequence to end the definition (which we define).
		4082	% #2 is the \...x control sequence for consecutive fns (which we define).
		4083	% #3 is the control sequence to call to resume processing.
		4084	% #4, delimited by the space, is the class name.
		4085	% #5 is the method's return type.
		4086	%
		4087	\def\deftypemethparsebody#1#2#3#4 #5 {\begingroup\inENV %
		4088	\medbreak %
		4089	% Define the end token that this defining construct specifies
		4090	% so that it will exit this group.
		4091	\def#1{\endgraf\endgroup\medbreak}%
		4092	\def#2##1 ##2 {\begingroup\obeylines\activeparens\spacesplit{#3{##1}{##2}}}%
		4093	\parindent=0in
		4094	\advance\leftskip by \defbodyindent
		4095	\exdentamount=\defbodyindent
		4096	\begingroup\obeylines\activeparens\spacesplit{#3{#4}{#5}}}
		4097
		4098	\def\defopparsebody #1#2#3#4#5 {\begingroup\inENV %
		4099	\medbreak %
		4100	% Define the end token that this defining construct specifies
		4101	% so that it will exit this group.
		4102	\def#1{\endgraf\endgroup\medbreak}%
		4103	\def#2##1 ##2 {\def#4{##1}%
		4104	\begingroup\obeylines\activeparens\spacesplit{#3{##2}}}%
		4105	\parindent=0in
		4106	\advance\leftskip by \defbodyindent
		4107	\exdentamount=\defbodyindent
		4108	\begingroup\obeylines\activeparens\spacesplit{#3{#5}}}
		4109
		4110	% These parsing functions are similar to the preceding ones
		4111	% except that they do not make parens into active characters.
		4112	% These are used for "variables" since they have no arguments.
		4113
		4114	\def\defvarparsebody #1#2#3{\begingroup\inENV% Environment for definitionbody
		4115	\medbreak %
		4116	% Define the end token that this defining construct specifies
		4117	% so that it will exit this group.
		4118	\def#1{\endgraf\endgroup\medbreak}%
		4119	\def#2{\begingroup\obeylines\spacesplit#3}%
		4120	\parindent=0in
		4121	\advance\leftskip by \defbodyindent
		4122	\exdentamount=\defbodyindent
		4123	\begingroup %
		4124	\catcode 61=\active %
		4125	\obeylines\spacesplit#3}
		4126
		4127	% This is used for \def{tp,vr}parsebody. It could probably be used for
		4128	% some of the others, too, with some judicious conditionals.
		4129	%
		4130	\def\parsebodycommon#1#2#3{%
		4131	\begingroup\inENV %
		4132	\medbreak %
		4133	% Define the end token that this defining construct specifies
		4134	% so that it will exit this group.
		4135	\def#1{\endgraf\endgroup\medbreak}%
		4136	\def#2##1 {\begingroup\obeylines\spacesplit{#3{##1}}}%
		4137	\parindent=0in
		4138	\advance\leftskip by \defbodyindent
		4139	\exdentamount=\defbodyindent
		4140	\begingroup\obeylines
		4141	}
		4142
		4143	\def\defvrparsebody#1#2#3#4 {%
		4144	\parsebodycommon{#1}{#2}{#3}%
		4145	\spacesplit{#3{#4}}%
		4146	}
		4147
		4148	% This loses on `@deftp {Data Type} {struct termios}' -- it thinks the
		4149	% type is just `struct', because we lose the braces in `{struct
		4150	% termios}' when \spacesplit reads its undelimited argument. Sigh.
		4151	% \let\deftpparsebody=\defvrparsebody
		4152	%
		4153	% So, to get around this, we put \empty in with the type name. That
		4154	% way, TeX won't find exactly `{...}' as an undelimited argument, and
		4155	% won't strip off the braces.
		4156	%
		4157	\def\deftpparsebody #1#2#3#4 {%
		4158	\parsebodycommon{#1}{#2}{#3}%
		4159	\spacesplit{\parsetpheaderline{#3{#4}}}\empty
		4160	}
		4161
		4162	% Fine, but then we have to eventually remove the \empty and the
		4163	% braces (if any). That's what this does.
		4164	%
		4165	\def\removeemptybraces\empty#1\relax{#1}
		4166
		4167	% After \spacesplit has done its work, this is called -- #1 is the final
		4168	% thing to call, #2 the type name (which starts with \empty), and #3
		4169	% (which might be empty) the arguments.
		4170	%
		4171	\def\parsetpheaderline#1#2#3{%
		4172	#1{\removeemptybraces#2\relax}{#3}%
		4173	}%
		4174
		4175	\def\defopvarparsebody #1#2#3#4#5 {\begingroup\inENV %
		4176	\medbreak %
		4177	% Define the end token that this defining construct specifies
		4178	% so that it will exit this group.
		4179	\def#1{\endgraf\endgroup\medbreak}%
		4180	\def#2##1 ##2 {\def#4{##1}%
		4181	\begingroup\obeylines\spacesplit{#3{##2}}}%
		4182	\parindent=0in
		4183	\advance\leftskip by \defbodyindent
		4184	\exdentamount=\defbodyindent
		4185	\begingroup\obeylines\spacesplit{#3{#5}}}
		4186
		4187	% Split up #2 at the first space token.
		4188	% call #1 with two arguments:
		4189	% the first is all of #2 before the space token,
		4190	% the second is all of #2 after that space token.
		4191	% If #2 contains no space token, all of it is passed as the first arg
		4192	% and the second is passed as empty.
		4193
		4194	{\obeylines
		4195	\gdef\spacesplit#1#2^^M{\endgroup\spacesplitfoo{#1}#2 \relax\spacesplitfoo}%
		4196	\long\gdef\spacesplitfoo#1#2 #3#4\spacesplitfoo{%
		4197	\ifx\relax #3%
		4198	#1{#2}{}\else #1{#2}{#3#4}\fi}}
		4199
		4200	% So much for the things common to all kinds of definitions.
		4201
		4202	% Define @defun.
		4203
		4204	% First, define the processing that is wanted for arguments of \defun
		4205	% Use this to expand the args and terminate the paragraph they make up
		4206
		4207	\def\defunargs #1{\functionparens \sl
		4208	% Expand, preventing hyphenation at `-' chars.
		4209	% Note that groups don't affect changes in \hyphenchar.
		4210	\hyphenchar\tensl=0
		4211	#1%
		4212	\hyphenchar\tensl=45
		4213	\ifnum\parencount=0 \else \errmessage{Unbalanced parentheses in @def}\fi%
		4214	\interlinepenalty=10000
		4215	\advance\rightskip by 0pt plus 1fil
		4216	\endgraf\nobreak\vskip -\parskip\nobreak
		4217	}
		4218
		4219	\def\deftypefunargs #1{%
		4220	% Expand, preventing hyphenation at `-' chars.
		4221	% Note that groups don't affect changes in \hyphenchar.
		4222	% Use \boldbraxnoamp, not \functionparens, so that & is not special.
		4223	\boldbraxnoamp
		4224	\tclose{#1}% avoid \code because of side effects on active chars
		4225	\interlinepenalty=10000
		4226	\advance\rightskip by 0pt plus 1fil
		4227	\endgraf\nobreak\vskip -\parskip\nobreak
		4228	}
		4229
		4230	% Do complete processing of one @defun or @defunx line already parsed.
		4231
		4232	% @deffn Command forward-char nchars
		4233
		4234	\def\deffn{\defmethparsebody\Edeffn\deffnx\deffnheader}
		4235
		4236	\def\deffnheader #1#2#3{\doind {fn}{\code{#2}}%
		4237	\begingroup\defname {#2}{#1}\defunargs{#3}\endgroup %
		4238	\catcode 61=\other % Turn off change made in \defparsebody
		4239	}
		4240
		4241	% @defun == @deffn Function
		4242
		4243	\def\defun{\defparsebody\Edefun\defunx\defunheader}
		4244
		4245	\def\defunheader #1#2{\doind {fn}{\code{#1}}% Make entry in function index
		4246	\begingroup\defname {#1}{Function}%
		4247	\defunargs {#2}\endgroup %
		4248	\catcode 61=\other % Turn off change made in \defparsebody
		4249	}
		4250
		4251	% @deftypefun int foobar (int @var{foo}, float @var{bar})
		4252
		4253	\def\deftypefun{\defparsebody\Edeftypefun\deftypefunx\deftypefunheader}
		4254
		4255	% #1 is the data type. #2 is the name and args.
		4256	\def\deftypefunheader #1#2{\deftypefunheaderx{#1}#2 \relax}
		4257	% #1 is the data type, #2 the name, #3 the args.
		4258	\def\deftypefunheaderx #1#2 #3\relax{%
		4259	\doind {fn}{\code{#2}}% Make entry in function index
		4260	\begingroup\defname {\defheaderxcond#1\relax$$$#2}{Function}%
		4261	\deftypefunargs {#3}\endgroup %
		4262	\catcode 61=\other % Turn off change made in \defparsebody
		4263	}
		4264
		4265	% @deftypefn {Library Function} int foobar (int @var{foo}, float @var{bar})
		4266
		4267	\def\deftypefn{\defmethparsebody\Edeftypefn\deftypefnx\deftypefnheader}
		4268
		4269	% \defheaderxcond#1\relax$$$
		4270	% puts #1 in @code, followed by a space, but does nothing if #1 is null.
		4271	\def\defheaderxcond#1#2$$${\ifx#1\relax\else\code{#1#2} \fi}
		4272
		4273	% #1 is the classification. #2 is the data type. #3 is the name and args.
		4274	\def\deftypefnheader #1#2#3{\deftypefnheaderx{#1}{#2}#3 \relax}
		4275	% #1 is the classification, #2 the data type, #3 the name, #4 the args.
		4276	\def\deftypefnheaderx #1#2#3 #4\relax{%
		4277	\doind {fn}{\code{#3}}% Make entry in function index
		4278	\begingroup
		4279	\normalparens % notably, turn off `&' magic, which prevents
		4280	% at least some C++ text from working
		4281	\defname {\defheaderxcond#2\relax$$$#3}{#1}%
		4282	\deftypefunargs {#4}\endgroup %
		4283	\catcode 61=\other % Turn off change made in \defparsebody
		4284	}
		4285
		4286	% @defmac == @deffn Macro
		4287
		4288	\def\defmac{\defparsebody\Edefmac\defmacx\defmacheader}
		4289
		4290	\def\defmacheader #1#2{\doind {fn}{\code{#1}}% Make entry in function index
		4291	\begingroup\defname {#1}{Macro}%
		4292	\defunargs {#2}\endgroup %
		4293	\catcode 61=\other % Turn off change made in \defparsebody
		4294	}
		4295
		4296	% @defspec == @deffn Special Form
		4297
		4298	\def\defspec{\defparsebody\Edefspec\defspecx\defspecheader}
		4299
		4300	\def\defspecheader #1#2{\doind {fn}{\code{#1}}% Make entry in function index
		4301	\begingroup\defname {#1}{Special Form}%
		4302	\defunargs {#2}\endgroup %
		4303	\catcode 61=\other % Turn off change made in \defparsebody
		4304	}
		4305
		4306	% This definition is run if you use @defunx
		4307	% anywhere other than immediately after a @defun or @defunx.
		4308
		4309	\def\deffnx #1 {\errmessage{@deffnx in invalid context}}
		4310	\def\defunx #1 {\errmessage{@defunx in invalid context}}
		4311	\def\defmacx #1 {\errmessage{@defmacx in invalid context}}
		4312	\def\defspecx #1 {\errmessage{@defspecx in invalid context}}
		4313	\def\deftypefnx #1 {\errmessage{@deftypefnx in invalid context}}
		4314	\def\deftypemethodx #1 {\errmessage{@deftypemethodx in invalid context}}
		4315	\def\deftypefunx #1 {\errmessage{@deftypefunx in invalid context}}
		4316
		4317	% @defmethod, and so on
		4318
		4319	% @defop CATEGORY CLASS OPERATION ARG...
		4320
		4321	\def\defop #1 {\def\defoptype{#1}%
		4322	\defopparsebody\Edefop\defopx\defopheader\defoptype}
		4323
		4324	\def\defopheader #1#2#3{%
		4325	\dosubind {fn}{\code{#2}}{\putwordon\ #1}% Make entry in function index
		4326	\begingroup\defname {#2}{\defoptype{} on #1}%
		4327	\defunargs {#3}\endgroup %
		4328	}
		4329
		4330	% @deftypemethod CLASS RETURN-TYPE METHOD ARG...
		4331	%
		4332	\def\deftypemethod{%
		4333	\deftypemethparsebody\Edeftypemethod\deftypemethodx\deftypemethodheader}
		4334	%
		4335	% #1 is the class name, #2 the data type, #3 the method name, #4 the args.
		4336	\def\deftypemethodheader#1#2#3#4{%
		4337	\dosubind{fn}{\code{#3}}{\putwordon\ \code{#1}}% entry in function index
		4338	\begingroup
		4339	\defname{\defheaderxcond#2\relax$$$#3}{\putwordMethodon\ \code{#1}}%
		4340	\deftypefunargs{#4}%
		4341	\endgroup
		4342	}
		4343
		4344	% @defmethod == @defop Method
		4345	%
		4346	\def\defmethod{\defmethparsebody\Edefmethod\defmethodx\defmethodheader}
		4347	%
		4348	% #1 is the class name, #2 the method name, #3 the args.
		4349	\def\defmethodheader#1#2#3{%
		4350	\dosubind{fn}{\code{#2}}{\putwordon\ \code{#1}}% entry in function index
		4351	\begingroup
		4352	\defname{#2}{\putwordMethodon\ \code{#1}}%
		4353	\defunargs{#3}%
		4354	\endgroup
		4355	}
		4356
		4357	% @defcv {Class Option} foo-class foo-flag
		4358
		4359	\def\defcv #1 {\def\defcvtype{#1}%
		4360	\defopvarparsebody\Edefcv\defcvx\defcvarheader\defcvtype}
		4361
		4362	\def\defcvarheader #1#2#3{%
		4363	\dosubind {vr}{\code{#2}}{of #1}% Make entry in var index
		4364	\begingroup\defname {#2}{\defcvtype{} of #1}%
		4365	\defvarargs {#3}\endgroup %
		4366	}
		4367
		4368	% @defivar == @defcv {Instance Variable}
		4369
		4370	\def\defivar{\defvrparsebody\Edefivar\defivarx\defivarheader}
		4371
		4372	\def\defivarheader #1#2#3{%
		4373	\dosubind {vr}{\code{#2}}{of #1}% Make entry in var index
		4374	\begingroup\defname {#2}{Instance Variable of #1}%
		4375	\defvarargs {#3}\endgroup %
		4376	}
		4377
		4378	% These definitions are run if you use @defmethodx, etc.,
		4379	% anywhere other than immediately after a @defmethod, etc.
		4380
		4381	\def\defopx #1 {\errmessage{@defopx in invalid context}}
		4382	\def\defmethodx #1 {\errmessage{@defmethodx in invalid context}}
		4383	\def\defcvx #1 {\errmessage{@defcvx in invalid context}}
		4384	\def\defivarx #1 {\errmessage{@defivarx in invalid context}}
		4385
		4386	% Now @defvar
		4387
		4388	% First, define the processing that is wanted for arguments of @defvar.
		4389	% This is actually simple: just print them in roman.
		4390	% This must expand the args and terminate the paragraph they make up
		4391	\def\defvarargs #1{\normalparens #1%
		4392	\interlinepenalty=10000
		4393	\endgraf\nobreak\vskip -\parskip\nobreak}
		4394
		4395	% @defvr Counter foo-count
		4396
		4397	\def\defvr{\defvrparsebody\Edefvr\defvrx\defvrheader}
		4398
		4399	\def\defvrheader #1#2#3{\doind {vr}{\code{#2}}%
		4400	\begingroup\defname {#2}{#1}\defvarargs{#3}\endgroup}
		4401
		4402	% @defvar == @defvr Variable
		4403
		4404	\def\defvar{\defvarparsebody\Edefvar\defvarx\defvarheader}
		4405
		4406	\def\defvarheader #1#2{\doind {vr}{\code{#1}}% Make entry in var index
		4407	\begingroup\defname {#1}{Variable}%
		4408	\defvarargs {#2}\endgroup %
		4409	}
		4410
		4411	% @defopt == @defvr {User Option}
		4412
		4413	\def\defopt{\defvarparsebody\Edefopt\defoptx\defoptheader}
		4414
		4415	\def\defoptheader #1#2{\doind {vr}{\code{#1}}% Make entry in var index
		4416	\begingroup\defname {#1}{User Option}%
		4417	\defvarargs {#2}\endgroup %
		4418	}
		4419
		4420	% @deftypevar int foobar
		4421
		4422	\def\deftypevar{\defvarparsebody\Edeftypevar\deftypevarx\deftypevarheader}
		4423
		4424	% #1 is the data type. #2 is the name, perhaps followed by text that
		4425	% is actually part of the data type, which should not be put into the index.
		4426	\def\deftypevarheader #1#2{%
		4427	\dovarind#2 \relax% Make entry in variables index
		4428	\begingroup\defname {\defheaderxcond#1\relax$$$#2}{Variable}%
		4429	\interlinepenalty=10000
		4430	\endgraf\nobreak\vskip -\parskip\nobreak
		4431	\endgroup}
		4432	\def\dovarind#1 #2\relax{\doind{vr}{\code{#1}}}
		4433
		4434	% @deftypevr {Global Flag} int enable
		4435
		4436	\def\deftypevr{\defvrparsebody\Edeftypevr\deftypevrx\deftypevrheader}
		4437
		4438	\def\deftypevrheader #1#2#3{\dovarind#3 \relax%
		4439	\begingroup\defname {\defheaderxcond#2\relax$$$#3}{#1}
		4440	\interlinepenalty=10000
		4441	\endgraf\nobreak\vskip -\parskip\nobreak
		4442	\endgroup}
		4443
		4444	% This definition is run if you use @defvarx
		4445	% anywhere other than immediately after a @defvar or @defvarx.
		4446
		4447	\def\defvrx #1 {\errmessage{@defvrx in invalid context}}
		4448	\def\defvarx #1 {\errmessage{@defvarx in invalid context}}
		4449	\def\defoptx #1 {\errmessage{@defoptx in invalid context}}
		4450	\def\deftypevarx #1 {\errmessage{@deftypevarx in invalid context}}
		4451	\def\deftypevrx #1 {\errmessage{@deftypevrx in invalid context}}
		4452
		4453	% Now define @deftp
		4454	% Args are printed in bold, a slight difference from @defvar.
		4455
		4456	\def\deftpargs #1{\bf \defvarargs{#1}}
		4457
		4458	% @deftp Class window height width ...
		4459
		4460	\def\deftp{\deftpparsebody\Edeftp\deftpx\deftpheader}
		4461
		4462	\def\deftpheader #1#2#3{\doind {tp}{\code{#2}}%
		4463	\begingroup\defname {#2}{#1}\deftpargs{#3}\endgroup}
		4464
		4465	% This definition is run if you use @deftpx, etc
		4466	% anywhere other than immediately after a @deftp, etc.
		4467
		4468	\def\deftpx #1 {\errmessage{@deftpx in invalid context}}
		4469
		4470
		4471	\message{macros,}
		4472	% @macro.
		4473
		4474	% To do this right we need a feature of e-TeX, \scantokens,
		4475	% which we arrange to emulate with a temporary file in ordinary TeX.
		4476	\ifx\eTeXversion\undefined
		4477	\newwrite\macscribble
		4478	\def\scanmacro#1{%
		4479	\begingroup \newlinechar`\^^M
		4480	\immediate\openout\macscribble=\jobname.tmp
		4481	\immediate\write\macscribble{#1}%
		4482	\immediate\closeout\macscribble
		4483	\let\xeatspaces\eatspaces
		4484	\input \jobname.tmp
		4485	\endgroup
		4486	}
		4487	\else
		4488	\def\scanmacro#1{%
		4489	\begingroup \newlinechar`\^^M
		4490	\let\xeatspaces\eatspaces\scantokens{#1}\endgroup}
		4491	\fi
		4492
		4493	\newcount\paramno % Count of parameters
		4494	\newtoks\macname % Macro name
		4495	\newif\ifrecursive % Is it recursive?
		4496
		4497	% Utility routines.
		4498	% Thisdoes \let #1 = #2, except with \csnames.
		4499	\def\cslet#1#2{%
		4500	\expandafter\expandafter
		4501	\expandafter\let
		4502	\expandafter\expandafter
		4503	\csname#1\endcsname
		4504	\csname#2\endcsname}
		4505
		4506	% Trim leading and trailing spaces off a string.
		4507	% Concepts from aro-bend problem 15 (see CTAN).
		4508	{\catcode`\@=11
		4509	\gdef\eatspaces #1{\expandafter\trim@\expandafter{#1 }}
		4510	\gdef\trim@ #1{\trim@@ @#1 @ #1 @ @@}
		4511	\gdef\trim@@ #1@ #2@ #3@@{\trim@@@\empty #2 @}
		4512	\def\unbrace#1{#1}
		4513	\unbrace{\gdef\trim@@@ #1 } #2@{#1}
		4514	}
		4515
		4516	% Trim a single trailing ^^M off a string.
		4517	{\catcode`\^^M=12\catcode`\Q=3%
		4518	\gdef\eatcr #1{\eatcra #1Q^^MQ}%
		4519	\gdef\eatcra#1^^MQ{\eatcrb#1Q}%
		4520	\gdef\eatcrb#1Q#2Q{#1}%
		4521	}
		4522
		4523	% Macro bodies are absorbed as an argument in a context where
		4524	% all characters are catcode 10, 11 or 12, except \ which is active
		4525	% (as in normal texinfo). It is necessary to change the definition of \.
		4526
		4527	% It's necessary to have hard CRs when the macro is executed. This is
		4528	% done by making ^^M (\endlinechar) catcode 12 when reading the macro
		4529	% body, and then making it the \newlinechar in \scanmacro.
		4530
		4531	\def\macrobodyctxt{%
		4532	\catcode`\~=12
		4533	\catcode`\^=12
		4534	\catcode`\_=12
		4535	\catcode`\\|=12
		4536	\catcode`\<=12
		4537	\catcode`\>=12
		4538	\catcode`\+=12
		4539	\catcode`\{=12
		4540	\catcode`\}=12
		4541	\catcode`\@=12
		4542	\catcode`\^^M=12
		4543	\usembodybackslash}
		4544
		4545	\def\macroargctxt{%
		4546	\catcode`\~=12
		4547	\catcode`\^=12
		4548	\catcode`\_=12
		4549	\catcode`\\|=12
		4550	\catcode`\<=12
		4551	\catcode`\>=12
		4552	\catcode`\+=12
		4553	\catcode`\@=12
		4554	\catcode`\\=12}
		4555
		4556	% \mbodybackslash is the definition of \ in @macro bodies.
		4557	% It maps \foo\ => \csname macarg.foo\endcsname => #N
		4558	% where N is the macro parameter number.
		4559	% We define \csname macarg.\endcsname to be \realbackslash, so
		4560	% \\ in macro replacement text gets you a backslash.
		4561
		4562	{\catcode`@=0 @catcode`@\=@active
		4563	@gdef@usembodybackslash{@let\=@mbodybackslash}
		4564	@gdef@mbodybackslash#1\{@csname macarg.#1@endcsname}
		4565	}
		4566	\expandafter\def\csname macarg.\endcsname{\realbackslash}
		4567
		4568	\def\macro{\recursivefalse\parsearg\macroxxx}
		4569	\def\rmacro{\recursivetrue\parsearg\macroxxx}
		4570
		4571	\def\macroxxx#1{%
		4572	\getargs{#1}% now \macname is the macname and \argl the arglist
		4573	\ifx\argl\empty % no arguments
		4574	\paramno=0%
		4575	\else
		4576	\expandafter\parsemargdef \argl;%
		4577	\fi
		4578	\expandafter\ifx \csname macsave.\the\macname\endcsname \relax
		4579	\cslet{macsave.\the\macname}{\the\macname}%
		4580	\else
		4581	\message{Warning: redefining \the\macname}%
		4582	\fi
		4583	\begingroup \macrobodyctxt
		4584	\ifrecursive \expandafter\parsermacbody
		4585	\else \expandafter\parsemacbody
		4586	\fi}
		4587
		4588	\def\unmacro{\parsearg\unmacroxxx}
		4589	\def\unmacroxxx#1{%
		4590	\expandafter\ifx \csname macsave.\the\macname\endcsname \relax
		4591	\errmessage{Macro \the\macname\ not defined.}%
		4592	\else
		4593	\cslet{#1}{macsave.#1}%
		4594	\expandafter\let \csname macsave.\the\macname\endcsname \undefined
		4595	\fi
		4596	}
		4597
		4598	% This makes use of the obscure feature that if the last token of a
		4599	% <parameter list> is #, then the preceding argument is delimited by
		4600	% an opening brace, and that opening brace is not consumed.
		4601	\def\getargs#1{\getargsxxx#1{}}
		4602	\def\getargsxxx#1#{\getmacname #1 \relax\getmacargs}
		4603	\def\getmacname #1 #2\relax{\macname={#1}}
		4604	\def\getmacargs#1{\def\argl{#1}}
		4605
		4606	% Parse the optional {params} list. Set up \paramno and \paramlist
		4607	% so \defmacro knows what to do. Define \macarg.blah for each blah
		4608	% in the params list, to be ##N where N is the position in that list.
		4609	% That gets used by \mbodybackslash (above).
		4610
		4611	% We need to get `macro parameter char #' into several definitions.
		4612	% The technique used is stolen from LaTeX: let \hash be something
		4613	% unexpandable, insert that wherever you need a #, and then redefine
		4614	% it to # just before using the token list produced.
		4615	%
		4616	% The same technique is used to protect \eatspaces till just before
		4617	% the macro is used.
		4618
		4619	\def\parsemargdef#1;{\paramno=0\def\paramlist{}%
		4620	\let\hash\relax\let\xeatspaces\relax\parsemargdefxxx#1,;,}
		4621	\def\parsemargdefxxx#1,{%
		4622	\if#1;\let\next=\relax
		4623	\else \let\next=\parsemargdefxxx
		4624	\advance\paramno by 1%
		4625	\expandafter\edef\csname macarg.\eatspaces{#1}\endcsname
		4626	{\xeatspaces{\hash\the\paramno}}%
		4627	\edef\paramlist{\paramlist\hash\the\paramno,}%
		4628	\fi\next}
		4629
		4630	% These two commands read recursive and nonrecursive macro bodies.
		4631	% (They're different since rec and nonrec macros end differently.)
		4632
		4633	\long\def\parsemacbody#1@end macro%
		4634	{\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
		4635	\long\def\parsermacbody#1@end rmacro%
		4636	{\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
		4637
		4638	% This defines the macro itself. There are six cases: recursive and
		4639	% nonrecursive macros of zero, one, and many arguments.
		4640	% Much magic with \expandafter here.
		4641	% \xdef is used so that macro definitions will survive the file
		4642	% they're defined in; @include reads the file inside a group.
		4643	\def\defmacro{%
		4644	\let\hash=##% convert placeholders to macro parameter chars
		4645	\ifrecursive
		4646	\ifcase\paramno
		4647	% 0
		4648	\expandafter\xdef\csname\the\macname\endcsname{%
		4649	\noexpand\scanmacro{\temp}}%
		4650	\or % 1
		4651	\expandafter\xdef\csname\the\macname\endcsname{%
		4652	\bgroup\noexpand\macroargctxt
		4653	\noexpand\braceorline\csname\the\macname xxx\endcsname}%
		4654	\expandafter\xdef\csname\the\macname xxx\endcsname##1{%
		4655	\egroup\noexpand\scanmacro{\temp}}%
		4656	\else % many
		4657	\expandafter\xdef\csname\the\macname\endcsname{%
		4658	\bgroup\noexpand\macroargctxt
		4659	\noexpand\csname\the\macname xx\endcsname}
		4660	\expandafter\xdef\csname\the\macname xx\endcsname##1{%
		4661	\csname\the\macname xxx\endcsname ##1,}%
		4662	\expandafter\expandafter
		4663	\expandafter\xdef
		4664	\expandafter\expandafter
		4665	\csname\the\macname xxx\endcsname
		4666	\paramlist{\egroup\noexpand\scanmacro{\temp}}%
		4667	\fi
		4668	\else
		4669	\ifcase\paramno
		4670	% 0
		4671	\expandafter\xdef\csname\the\macname\endcsname{%
		4672	\noexpand\norecurse{\the\macname}%
		4673	\noexpand\scanmacro{\temp}\egroup}%
		4674	\or % 1
		4675	\expandafter\xdef\csname\the\macname\endcsname{%
		4676	\bgroup\noexpand\macroargctxt
		4677	\noexpand\braceorline\csname\the\macname xxx\endcsname}%
		4678	\expandafter\xdef\csname\the\macname xxx\endcsname##1{%
		4679	\egroup
		4680	\noexpand\norecurse{\the\macname}%
		4681	\noexpand\scanmacro{\temp}\egroup}%
		4682	\else % many
		4683	\expandafter\xdef\csname\the\macname\endcsname{%
		4684	\bgroup\noexpand\macroargctxt
		4685	\noexpand\csname\the\macname xx\endcsname}
		4686	\expandafter\xdef\csname\the\macname xx\endcsname##1{%
		4687	\csname\the\macname xxx\endcsname ##1,}%
		4688	\expandafter\expandafter
		4689	\expandafter\xdef
		4690	\expandafter\expandafter
		4691	\csname\the\macname xxx\endcsname
		4692	\paramlist{%
		4693	\egroup
		4694	\noexpand\norecurse{\the\macname}%
		4695	\noexpand\scanmacro{\temp}\egroup}%
		4696	\fi
		4697	\fi}
		4698
		4699	\def\norecurse#1{\bgroup\cslet{#1}{macsave.#1}}
		4700
		4701	% \braceorline decides whether the next nonwhitespace character is a
		4702	% {. If so it reads up to the closing }, if not, it reads the whole
		4703	% line. Whatever was read is then fed to the next control sequence
		4704	% as an argument (by \parsebrace or \parsearg)
		4705	\def\braceorline#1{\let\next=#1\futurelet\nchar\braceorlinexxx}
		4706	\def\braceorlinexxx{%
		4707	\ifx\nchar\bgroup\else
		4708	\expandafter\parsearg
		4709	\fi \next}
		4710
		4711
		4712	\message{cross references,}
		4713	\newwrite\auxfile
		4714
		4715	\newif\ifhavexrefs % True if xref values are known.
		4716	\newif\ifwarnedxrefs % True if we warned once that they aren't known.
		4717
		4718	% @inforef is relatively simple.
		4719	\def\inforef #1{\inforefzzz #1,,,,**}
		4720	\def\inforefzzz #1,#2,#3,#4**{\putwordSee{} \putwordInfo{} \putwordfile{} \file{\ignorespaces #3{}},
		4721	node \samp{\ignorespaces#1{}}}
		4722
		4723	% @node's job is to define \lastnode.
		4724	\def\node{\ENVcheck\parsearg\nodezzz}
		4725	\def\nodezzz#1{\nodexxx [#1,]}
		4726	\def\nodexxx[#1,#2]{\gdef\lastnode{#1}}
		4727	\let\nwnode=\node
		4728	\let\lastnode=\relax
		4729
		4730	% The sectioning commands (@chapter, etc.) call these.
		4731	\def\donoderef{%
		4732	\ifx\lastnode\relax\else
		4733	\expandafter\expandafter\expandafter\setref{\lastnode}%
		4734	{Ysectionnumberandtype}%
		4735	\global\let\lastnode=\relax
		4736	\fi
		4737	}
		4738	\def\unnumbnoderef{%
		4739	\ifx\lastnode\relax\else
		4740	\expandafter\expandafter\expandafter\setref{\lastnode}{Ynothing}%
		4741	\global\let\lastnode=\relax
		4742	\fi
		4743	}
		4744	\def\appendixnoderef{%
		4745	\ifx\lastnode\relax\else
		4746	\expandafter\expandafter\expandafter\setref{\lastnode}%
		4747	{Yappendixletterandtype}%
		4748	\global\let\lastnode=\relax
		4749	\fi
		4750	}
		4751
		4752
		4753	% @anchor{NAME} -- define xref target at arbitrary point.
		4754	%
		4755	\def\anchor#1{\setref{#1}{Ynothing}}
		4756
		4757
		4758	% \setref{NAME}{SNT} defines a cross-reference point NAME, namely
		4759	% NAME-title, NAME-pg, and NAME-SNT. Called from \foonoderef. We have
		4760	% to set \indexdummies so commands such as @code in a section title
		4761	% aren't expanded. It would be nicer not to expand the titles in the
		4762	% first place, but there's so many layers that that is hard to do.
		4763	%
		4764	\def\setref#1#2{{%
		4765	\indexdummies
		4766	\dosetq{#1-title}{Ytitle}%
		4767	\dosetq{#1-pg}{Ypagenumber}%
		4768	\dosetq{#1-snt}{#2}
		4769	}}
		4770
		4771	% @xref, @pxref, and @ref generate cross-references. For \xrefX, #1 is
		4772	% the node name, #2 the name of the Info cross-reference, #3 the printed
		4773	% node name, #4 the name of the Info file, #5 the name of the printed
		4774	% manual. All but the node name can be omitted.
		4775	%
		4776	\def\pxref#1{\putwordsee{} \xrefX[#1,,,,,,,]}
		4777	\def\xref#1{\putwordSee{} \xrefX[#1,,,,,,,]}
		4778	\def\ref#1{\xrefX[#1,,,,,,,]}
		4779	\def\xrefX[#1,#2,#3,#4,#5,#6]{\begingroup
		4780	\def\printedmanual{\ignorespaces #5}%
		4781	\def\printednodename{\ignorespaces #3}%
		4782	\setbox1=\hbox{\printedmanual}%
		4783	\setbox0=\hbox{\printednodename}%
		4784	\ifdim \wd0 = 0pt
		4785	% No printed node name was explicitly given.
		4786	\expandafter\ifx\csname SETxref-automatic-section-title\endcsname\relax
		4787	% Use the node name inside the square brackets.
		4788	\def\printednodename{\ignorespaces #1}%
		4789	\else
		4790	% Use the actual chapter/section title appear inside
		4791	% the square brackets. Use the real section title if we have it.
		4792	\ifdim \wd1 > 0pt
		4793	% It is in another manual, so we don't have it.
		4794	\def\printednodename{\ignorespaces #1}%
		4795	\else
		4796	\ifhavexrefs
		4797	% We know the real title if we have the xref values.
		4798	\def\printednodename{\refx{#1-title}{}}%
		4799	\else
		4800	% Otherwise just copy the Info node name.
		4801	\def\printednodename{\ignorespaces #1}%
		4802	\fi%
		4803	\fi
		4804	\fi
		4805	\fi
		4806	%
		4807	% If we use \unhbox0 and \unhbox1 to print the node names, TeX does not
		4808	% insert empty discretionaries after hyphens, which means that it will
		4809	% not find a line break at a hyphen in a node names. Since some manuals
		4810	% are best written with fairly long node names, containing hyphens, this
		4811	% is a loss. Therefore, we give the text of the node name again, so it
		4812	% is as if TeX is seeing it for the first time.
		4813	\ifdim \wd1 > 0pt
		4814	\putwordsection{} ``\printednodename'' in \cite{\printedmanual}%
		4815	\else
		4816	% _ (for example) has to be the character _ for the purposes of the
		4817	% control sequence corresponding to the node, but it has to expand
		4818	% into the usual \leavevmode...\vrule stuff for purposes of
		4819	% printing. So we \turnoffactive for the \refx-snt, back on for the
		4820	% printing, back off for the \refx-pg.
		4821	{\normalturnoffactive
		4822	% Only output a following space if the -snt ref is nonempty; for
		4823	% @unnumbered and @anchor, it won't be.
		4824	\setbox2 = \hbox{\ignorespaces \refx{#1-snt}{}}%
		4825	\ifdim \wd2 > 0pt \refx{#1-snt}\space\fi
		4826	}%
		4827	% [mynode],
		4828	[\printednodename],\space
		4829	% page 3
		4830	\turnoffactive \putwordpage\tie\refx{#1-pg}{}%
		4831	\fi
		4832	\endgroup}
		4833
		4834	% \dosetq is the interface for calls from other macros
		4835
		4836	% Use \normalturnoffactive so that punctuation chars such as underscore
		4837	% and backslash work in node names. (\turnoffactive doesn't do \.)
		4838	\def\dosetq#1#2{%
		4839	{\let\folio=0
		4840	\normalturnoffactive
		4841	\edef\next{\write\auxfile{\internalsetq{#1}{#2}}}%
		4842	\iflinks
		4843	\next
		4844	\fi
		4845	}%
		4846	}
		4847
		4848	% \internalsetq {foo}{page} expands into
		4849	% CHARACTERS 'xrdef {foo}{...expansion of \Ypage...}
		4850	% When the aux file is read, ' is the escape character
		4851
		4852	\def\internalsetq #1#2{'xrdef {#1}{\csname #2\endcsname}}
		4853
		4854	% Things to be expanded by \internalsetq
		4855
		4856	\def\Ypagenumber{\folio}
		4857
		4858	\def\Ytitle{\thissection}
		4859
		4860	\def\Ynothing{}
		4861
		4862	\def\Ysectionnumberandtype{%
		4863	\ifnum\secno=0 \putwordChapter\xreftie\the\chapno %
		4864	\else \ifnum \subsecno=0 \putwordSection\xreftie\the\chapno.\the\secno %
		4865	\else \ifnum \subsubsecno=0 %
		4866	\putwordSection\xreftie\the\chapno.\the\secno.\the\subsecno %
		4867	\else %
		4868	\putwordSection\xreftie\the\chapno.\the\secno.\the\subsecno.\the\subsubsecno %
		4869	\fi \fi \fi }
		4870
		4871	\def\Yappendixletterandtype{%
		4872	\ifnum\secno=0 \putwordAppendix\xreftie'char\the\appendixno{}%
		4873	\else \ifnum \subsecno=0 \putwordSection\xreftie'char\the\appendixno.\the\secno %
		4874	\else \ifnum \subsubsecno=0 %
		4875	\putwordSection\xreftie'char\the\appendixno.\the\secno.\the\subsecno %
		4876	\else %
		4877	\putwordSection\xreftie'char\the\appendixno.\the\secno.\the\subsecno.\the\subsubsecno %
		4878	\fi \fi \fi }
		4879
		4880	\gdef\xreftie{'tie}
		4881
		4882	% Use TeX 3.0's \inputlineno to get the line number, for better error
		4883	% messages, but if we're using an old version of TeX, don't do anything.
		4884	%
		4885	\ifx\inputlineno\thisisundefined
		4886	\let\linenumber = \empty % Non-3.0.
		4887	\else
		4888	\def\linenumber{\the\inputlineno:\space}
		4889	\fi
		4890
		4891	% Define \refx{NAME}{SUFFIX} to reference a cross-reference string named NAME.
		4892	% If its value is nonempty, SUFFIX is output afterward.
		4893
		4894	\def\refx#1#2{%
		4895	\expandafter\ifx\csname X#1\endcsname\relax
		4896	% If not defined, say something at least.
		4897	\angleleft un\-de\-fined\angleright
		4898	\iflinks
		4899	\ifhavexrefs
		4900	\message{\linenumber Undefined cross reference `#1'.}%
		4901	\else
		4902	\ifwarnedxrefs\else
		4903	\global\warnedxrefstrue
		4904	\message{Cross reference values unknown; you must run TeX again.}%
		4905	\fi
		4906	\fi
		4907	\fi
		4908	\else
		4909	% It's defined, so just use it.
		4910	\csname X#1\endcsname
		4911	\fi
		4912	#2% Output the suffix in any case.
		4913	}
		4914
		4915	% This is the macro invoked by entries in the aux file.
		4916	%
		4917	\def\xrdef#1{\begingroup
		4918	% Reenable \ as an escape while reading the second argument.
		4919	\catcode`\\ = 0
		4920	\afterassignment\endgroup
		4921	\expandafter\gdef\csname X#1\endcsname
		4922	}
		4923
		4924	% Read the last existing aux file, if any. No error if none exists.
		4925	\def\readauxfile{\begingroup
		4926	\catcode`\^^@=\other
		4927	\catcode`\^^A=\other
		4928	\catcode`\^^B=\other
		4929	\catcode`\^^C=\other
		4930	\catcode`\^^D=\other
		4931	\catcode`\^^E=\other
		4932	\catcode`\^^F=\other
		4933	\catcode`\^^G=\other
		4934	\catcode`\^^H=\other
		4935	\catcode`\^^K=\other
		4936	\catcode`\^^L=\other
		4937	\catcode`\^^N=\other
		4938	\catcode`\^^P=\other
		4939	\catcode`\^^Q=\other
		4940	\catcode`\^^R=\other
		4941	\catcode`\^^S=\other
		4942	\catcode`\^^T=\other
		4943	\catcode`\^^U=\other
		4944	\catcode`\^^V=\other
		4945	\catcode`\^^W=\other
		4946	\catcode`\^^X=\other
		4947	\catcode`\^^Z=\other
		4948	\catcode`\^^[=\other
		4949	\catcode`\^^\=\other
		4950	\catcode`\^^]=\other
		4951	\catcode`\^^^=\other
		4952	\catcode`\^^_=\other
		4953	\catcode`\@=\other
		4954	\catcode`\^=\other
		4955	% It was suggested to define this as 7, which would allow ^^e4 etc.
		4956	% in xref tags, i.e., node names. But since ^^e4 notation isn't
		4957	% supported in the main text, it doesn't seem desirable. Furthermore,
		4958	% that is not enough: for node names that actually contain a ^
		4959	% character, we would end up writing a line like this: 'xrdef {'hat
		4960	% b-title}{'hat b} and \xrdef does a \csname...\endcsname on the first
		4961	% argument, and \hat is not an expandable control sequence. It could
		4962	% all be worked out, but why? Either we support ^^ or we don't.
		4963	%
		4964	% The other change necessary for this was to define \auxhat:
		4965	% \def\auxhat{\def^{'hat }}% extra space so ok if followed by letter
		4966	% and then to call \auxhat in \setq.
		4967	%
		4968	\catcode`\~=\other
		4969	\catcode`\[=\other
		4970	\catcode`\]=\other
		4971	\catcode`\"=\other
		4972	\catcode`\_=\other
		4973	\catcode`\\|=\other
		4974	\catcode`\<=\other
		4975	\catcode`\>=\other
		4976	\catcode`\$=\other
		4977	\catcode`\#=\other
		4978	\catcode`\&=\other
		4979	\catcode`+=\other % avoid \+ for paranoia even though we've turned it off
		4980	% Make the characters 128-255 be printing characters
		4981	{%
		4982	\count 1=128
		4983	\def\loop{%
		4984	\catcode\count 1=\other
		4985	\advance\count 1 by 1
		4986	\ifnum \count 1<256 \loop \fi
		4987	}%
		4988	}%
		4989	% The aux file uses ' as the escape (for now).
		4990	% Turn off \ as an escape so we do not lose on
		4991	% entries which were dumped with control sequences in their names.
		4992	% For example, 'xrdef {$\leq $-fun}{page ...} made by @defun ^^
		4993	% Reference to such entries still does not work the way one would wish,
		4994	% but at least they do not bomb out when the aux file is read in.
		4995	\catcode`\{=1
		4996	\catcode`\}=2
		4997	\catcode`\%=\other
		4998	\catcode`\'=0
		4999	\catcode`\\=\other
		5000	%
		5001	\openin 1 \jobname.aux
		5002	\ifeof 1 \else
		5003	\closein 1
		5004	\input \jobname.aux
		5005	\global\havexrefstrue
		5006	\global\warnedobstrue
		5007	\fi
		5008	% Open the new aux file. TeX will close it automatically at exit.
		5009	\openout\auxfile=\jobname.aux
		5010	\endgroup}
		5011
		5012
		5013	% Footnotes.
		5014
		5015	\newcount \footnoteno
		5016
		5017	% The trailing space in the following definition for supereject is
		5018	% vital for proper filling; pages come out unaligned when you do a
		5019	% pagealignmacro call if that space before the closing brace is
		5020	% removed. (Generally, numeric constants should always be followed by a
		5021	% space to prevent strange expansion errors.)
		5022	\def\supereject{\par\penalty -20000\footnoteno =0 }
		5023
		5024	% @footnotestyle is meaningful for info output only.
		5025	\let\footnotestyle=\comment
		5026
		5027	\let\ptexfootnote=\footnote
		5028
		5029	{\catcode `\@=11
		5030	%
		5031	% Auto-number footnotes. Otherwise like plain.
		5032	\gdef\footnote{%
		5033	\global\advance\footnoteno by \@ne
		5034	\edef\thisfootno{$^{\the\footnoteno}$}%
		5035	%
		5036	% In case the footnote comes at the end of a sentence, preserve the
		5037	% extra spacing after we do the footnote number.
		5038	\let\@sf\empty
		5039	\ifhmode\edef\@sf{\spacefactor\the\spacefactor}\/\fi
		5040	%
		5041	% Remove inadvertent blank space before typesetting the footnote number.
		5042	\unskip
		5043	\thisfootno\@sf
		5044	\footnotezzz
		5045	}%
		5046
		5047	% Don't bother with the trickery in plain.tex to not require the
		5048	% footnote text as a parameter. Our footnotes don't need to be so general.
		5049	%
		5050	% Oh yes, they do; otherwise, @ifset and anything else that uses
		5051	% \parseargline fail inside footnotes because the tokens are fixed when
		5052	% the footnote is read. --karl, 16nov96.
		5053	%
		5054	\long\gdef\footnotezzz{\insert\footins\bgroup
		5055	% We want to typeset this text as a normal paragraph, even if the
		5056	% footnote reference occurs in (for example) a display environment.
		5057	% So reset some parameters.
		5058	\interlinepenalty\interfootnotelinepenalty
		5059	\splittopskip\ht\strutbox % top baseline for broken footnotes
		5060	\splitmaxdepth\dp\strutbox
		5061	\floatingpenalty\@MM
		5062	\leftskip\z@skip
		5063	\rightskip\z@skip
		5064	\spaceskip\z@skip
		5065	\xspaceskip\z@skip
		5066	\parindent\defaultparindent
		5067	%
		5068	% Hang the footnote text off the number.
		5069	\hang
		5070	\textindent{\thisfootno}%
		5071	%
		5072	% Don't crash into the line above the footnote text. Since this
		5073	% expands into a box, it must come within the paragraph, lest it
		5074	% provide a place where TeX can split the footnote.
		5075	\footstrut
		5076	\futurelet\next\fo@t
		5077	}
		5078	\def\fo@t{\ifcat\bgroup\noexpand\next \let\next\f@@t
		5079	\else\let\next\f@t\fi \next}
		5080	\def\f@@t{\bgroup\aftergroup\@foot\let\next}
		5081	\def\f@t#1{#1\@foot}
		5082	\def\@foot{\strut\egroup}
		5083
		5084	}%end \catcode `\@=11
		5085
		5086	% Set the baselineskip to #1, and the lineskip and strut size
		5087	% correspondingly. There is no deep meaning behind these magic numbers
		5088	% used as factors; they just match (closely enough) what Knuth defined.
		5089	%
		5090	\def\lineskipfactor{.08333}
		5091	\def\strutheightpercent{.70833}
		5092	\def\strutdepthpercent {.29167}
		5093	%
		5094	\def\setleading#1{%
		5095	\normalbaselineskip = #1\relax
		5096	\normallineskip = \lineskipfactor\normalbaselineskip
		5097	\normalbaselines
		5098	\setbox\strutbox =\hbox{%
		5099	\vrule width0pt height\strutheightpercent\baselineskip
		5100	depth \strutdepthpercent \baselineskip
		5101	}%
		5102	}
		5103
		5104	% @\| inserts a changebar to the left of the current line. It should
		5105	% surround any changed text. This approach does not work if the
		5106	% change spans more than two lines of output. To handle that, we would
		5107	% have adopt a much more difficult approach (putting marks into the main
		5108	% vertical list for the beginning and end of each change).
		5109	%
		5110	\def\\|{%
		5111	% \vadjust can only be used in horizontal mode.
		5112	\leavevmode
		5113	%
		5114	% Append this vertical mode material after the current line in the output.
		5115	\vadjust{%
		5116	% We want to insert a rule with the height and depth of the current
		5117	% leading; that is exactly what \strutbox is supposed to record.
		5118	\vskip-\baselineskip
		5119	%
		5120	% \vadjust-items are inserted at the left edge of the type. So
		5121	% the \llap here moves out into the left-hand margin.
		5122	\llap{%
		5123	%
		5124	% For a thicker or thinner bar, change the `1pt'.
		5125	\vrule height\baselineskip width1pt
		5126	%
		5127	% This is the space between the bar and the text.
		5128	\hskip 12pt
		5129	}%
		5130	}%
		5131	}
		5132
		5133	% For a final copy, take out the rectangles
		5134	% that mark overfull boxes (in case you have decided
		5135	% that the text looks ok even though it passes the margin).
		5136	%
		5137	\def\finalout{\overfullrule=0pt}
		5138
		5139	% @image. We use the macros from epsf.tex to support this.
		5140	% If epsf.tex is not installed and @image is used, we complain.
		5141	%
		5142	% Check for and read epsf.tex up front. If we read it only at @image
		5143	% time, we might be inside a group, and then its definitions would get
		5144	% undone and the next image would fail.
		5145	\openin 1 = epsf.tex
		5146	\ifeof 1 \else
		5147	\closein 1
		5148	% Do not bother showing banner with post-v2.7 epsf.tex (available in
		5149	% doc/epsf.tex until it shows up on ctan).
		5150	\def\epsfannounce{\toks0 = }%
		5151	\input epsf.tex
		5152	\fi
		5153	%
		5154	\newif\ifwarnednoepsf
		5155	\newhelp\noepsfhelp{epsf.tex must be installed for images to
		5156	work. It is also included in the Texinfo distribution, or you can get
		5157	it from ftp://ftp.tug.org/tex/epsf.tex.}
		5158	%
		5159	% Only complain once about lack of epsf.tex.
		5160	\def\image#1{%
		5161	\ifx\epsfbox\undefined
		5162	\ifwarnednoepsf \else
		5163	\errhelp = \noepsfhelp
		5164	\errmessage{epsf.tex not found, images will be ignored}%
		5165	\global\warnednoepsftrue
		5166	\fi
		5167	\else
		5168	\imagexxx #1,,,\finish
		5169	\fi
		5170	}
		5171	%
		5172	% Arguments to @image:
		5173	% #1 is (mandatory) image filename; we tack on .eps extension.
		5174	% #2 is (optional) width, #3 is (optional) height.
		5175	% #4 is just the usual extra ignored arg for parsing this stuff.
		5176	\def\imagexxx#1,#2,#3,#4\finish{%
		5177	% \epsfbox itself resets \epsf?size at each figure.
		5178	\setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \epsfxsize=#2\relax \fi
		5179	\setbox0 = \hbox{\ignorespaces #3}\ifdim\wd0 > 0pt \epsfysize=#3\relax \fi
		5180	% If the image is by itself, center it.
		5181	\ifvmode
		5182	\nobreak\medskip
		5183	\nobreak
		5184	\centerline{\epsfbox{#1.eps}}%
		5185	\bigbreak
		5186	\else
		5187	\epsfbox{#1.eps}%
		5188	\fi
		5189	}
		5190
		5191
		5192	\message{paper sizes,}
		5193	% And other related parameters.
		5194
		5195	\newdimen\defaultparindent \defaultparindent = 15pt
		5196
		5197	\chapheadingskip = 15pt plus 4pt minus 2pt
		5198	\secheadingskip = 12pt plus 3pt minus 2pt
		5199	\subsecheadingskip = 9pt plus 2pt minus 2pt
		5200
		5201	% Prevent underfull vbox error messages.
		5202	\vbadness = 10000
		5203
		5204	% Don't be so finicky about underfull hboxes, either.
		5205	\hbadness = 2000
		5206
		5207	% Following George Bush, just get rid of widows and orphans.
		5208	\widowpenalty=10000
		5209	\clubpenalty=10000
		5210
		5211	% Use TeX 3.0's \emergencystretch to help line breaking, but if we're
		5212	% using an old version of TeX, don't do anything. We want the amount of
		5213	% stretch added to depend on the line length, hence the dependence on
		5214	% \hsize. This makes it come to about 9pt for the 8.5x11 format. We
		5215	% call this whenever the paper size is set.
		5216	%
		5217	\def\setemergencystretch{%
		5218	\ifx\emergencystretch\thisisundefined
		5219	% Allow us to assign to \emergencystretch anyway.
		5220	\def\emergencystretch{\dimen0}%
		5221	\else
		5222	\emergencystretch = \hsize
		5223	\divide\emergencystretch by 45
		5224	\fi
		5225	}
		5226
		5227	% Parameters in order: 1) textheight; 2) textwidth; 3) voffset;
		5228	% 4) hoffset; 5) binding offset; 6) topskip. Then whoever calls us can
		5229	% set \parskip and call \setleading for \baselineskip.
		5230	%
		5231	\def\internalpagesizes#1#2#3#4#5#6{%
		5232	\voffset = #3\relax
		5233	\topskip = #6\relax
		5234	\splittopskip = \topskip
		5235	%
		5236	\vsize = #1\relax
		5237	\advance\vsize by \topskip
		5238	\outervsize = \vsize
		5239	\advance\outervsize by 2\topandbottommargin
		5240	\pageheight = \vsize
		5241	%
		5242	\hsize = #2\relax
		5243	\outerhsize = \hsize
		5244	\advance\outerhsize by 0.5in
		5245	\pagewidth = \hsize
		5246	%
		5247	\normaloffset = #4\relax
		5248	\bindingoffset = #5\relax
		5249	%
		5250	\parindent = \defaultparindent
		5251	\setemergencystretch
		5252	}
		5253
		5254	% @letterpaper (the default).
		5255	\def\letterpaper{{\globaldefs = 1
		5256	\parskip = 3pt plus 2pt minus 1pt
		5257	\setleading{13.2pt}%
		5258	%
		5259	% If page is nothing but text, make it come out even.
		5260	\internalpagesizes{46\baselineskip}{6in}{\voffset}{.25in}{\bindingoffset}{36pt}%
		5261	}}
		5262
		5263	% Use @smallbook to reset parameters for 7x9.5 (or so) format.
		5264	\def\smallbook{{\globaldefs = 1
		5265	\parskip = 2pt plus 1pt
		5266	\setleading{12pt}%
		5267	%
		5268	\internalpagesizes{7.5in}{5.in}{\voffset}{.25in}{\bindingoffset}{16pt}%
		5269	%
		5270	\lispnarrowing = 0.3in
		5271	\tolerance = 700
		5272	\hfuzz = 1pt
		5273	\contentsrightmargin = 0pt
		5274	\deftypemargin = 0pt
		5275	\defbodyindent = .5cm
		5276	%
		5277	\let\smalldisplay = \smalldisplayx
		5278	\let\smallexample = \smalllispx
		5279	\let\smallformat = \smallformatx
		5280	\let\smalllisp = \smalllispx
		5281	}}
		5282
		5283	% Use @afourpaper to print on European A4 paper.
		5284	\def\afourpaper{{\globaldefs = 1
		5285	\setleading{12pt}%
		5286	\parskip = 3pt plus 2pt minus 1pt
		5287	%
		5288	\internalpagesizes{53\baselineskip}{160mm}{\voffset}{4mm}{\bindingoffset}{44pt}%
		5289	%
		5290	\tolerance = 700
		5291	\hfuzz = 1pt
		5292	}}
		5293
		5294	% A specific text layout, 24x15cm overall, intended for A4 paper. Top margin
		5295	% 29mm, hence bottom margin 28mm, nominal side margin 3cm.
		5296	\def\afourlatex{{\globaldefs = 1
		5297	\setleading{13.6pt}%
		5298	%
		5299	\afourpaper
		5300	\internalpagesizes{237mm}{150mm}{3.6mm}{3.6mm}{3mm}{7mm}%
		5301	%
		5302	\globaldefs = 0
		5303	}}
		5304
		5305	% Use @afourwide to print on European A4 paper in wide format.
		5306	\def\afourwide{%
		5307	\afourpaper
		5308	\internalpagesizes{9.5in}{6.5in}{\hoffset}{\normaloffset}{\bindingoffset}{7mm}%
		5309	%
		5310	\globaldefs = 0
		5311	}
		5312
		5313	% @pagesizes TEXTHEIGHT[,TEXTWIDTH]
		5314	% Perhaps we should allow setting the margins, \topskip, \parskip,
		5315	% and/or leading, also. Or perhaps we should compute them somehow.
		5316	%
		5317	\def\pagesizes{\parsearg\pagesizesxxx}
		5318	\def\pagesizesxxx#1{\pagesizesyyy #1,,\finish}
		5319	\def\pagesizesyyy#1,#2,#3\finish{{%
		5320	\setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \hsize=#2\relax \fi
		5321	\globaldefs = 1
		5322	%
		5323	\parskip = 3pt plus 2pt minus 1pt
		5324	\setleading{13.2pt}%
		5325	%
		5326	\internalpagesizes{#1}{\hsize}{\voffset}{\normaloffset}{\bindingoffset}{44pt}%
		5327	}}
		5328
		5329	% Set default to letter.
		5330	%
		5331	\letterpaper
		5332
		5333	\message{and turning on texinfo input format.}
		5334
		5335	% Define macros to output various characters with catcode for normal text.
		5336	\catcode`\"=\other
		5337	\catcode`\~=\other
		5338	\catcode`\^=\other
		5339	\catcode`\_=\other
		5340	\catcode`\\|=\other
		5341	\catcode`\<=\other
		5342	\catcode`\>=\other
		5343	\catcode`\+=\other
		5344	\def\normaldoublequote{"}
		5345	\def\normaltilde{~}
		5346	\def\normalcaret{^}
		5347	\def\normalunderscore{_}
		5348	\def\normalverticalbar{\|}
		5349	\def\normalless{<}
		5350	\def\normalgreater{>}
		5351	\def\normalplus{+}
		5352
		5353	% This macro is used to make a character print one way in ttfont
		5354	% where it can probably just be output, and another way in other fonts,
		5355	% where something hairier probably needs to be done.
		5356	%
		5357	% #1 is what to print if we are indeed using \tt; #2 is what to print
		5358	% otherwise. Since all the Computer Modern typewriter fonts have zero
		5359	% interword stretch (and shrink), and it is reasonable to expect all
		5360	% typewriter fonts to have this, we can check that font parameter.
		5361	%
		5362	\def\ifusingtt#1#2{\ifdim \fontdimen3\the\font=0pt #1\else #2\fi}
		5363
		5364	% Turn off all special characters except @
		5365	% (and those which the user can use as if they were ordinary).
		5366	% Most of these we simply print from the \tt font, but for some, we can
		5367	% use math or other variants that look better in normal text.
		5368
		5369	\catcode`\"=\active
		5370	\def\activedoublequote{{\tt\char34}}
		5371	\let"=\activedoublequote
		5372	\catcode`\~=\active
		5373	\def~{{\tt\char126}}
		5374	\chardef\hat=`\^
		5375	\catcode`\^=\active
		5376	\def^{{\tt \hat}}
		5377
		5378	\catcode`\_=\active
		5379	\def_{\ifusingtt\normalunderscore\_}
		5380	% Subroutine for the previous macro.
		5381	\def\_{\leavevmode \kern.06em \vbox{\hrule width.3em height.1ex}}
		5382
		5383	\catcode`\\|=\active
		5384	\def\|{{\tt\char124}}
		5385	\chardef \less=`\<
		5386	\catcode`\<=\active
		5387	\def<{{\tt \less}}
		5388	\chardef \gtr=`\>
		5389	\catcode`\>=\active
		5390	\def>{{\tt \gtr}}
		5391	\catcode`\+=\active
		5392	\def+{{\tt \char 43}}
		5393	%\catcode 27=\active
		5394	%\def^^[{$\diamondsuit$}
		5395
		5396	% Set up an active definition for =, but don't enable it most of the time.
		5397	{\catcode`\==\active
		5398	\global\def={{\tt \char 61}}}
		5399
		5400	\catcode`+=\active
		5401	\catcode`\_=\active
		5402
		5403	% If a .fmt file is being used, characters that might appear in a file
		5404	% name cannot be active until we have parsed the command line.
		5405	% So turn them off again, and have \everyjob (or @setfilename) turn them on.
		5406	% \otherifyactive is called near the end of this file.
		5407	\def\otherifyactive{\catcode`+=\other \catcode`\_=\other}
		5408
		5409	\catcode`\@=0
		5410
		5411	% \rawbackslashxx output one backslash character in current font
		5412	\global\chardef\rawbackslashxx=`\\
		5413	%{\catcode`\\=\other
		5414	%@gdef@rawbackslashxx{\}}
		5415
		5416	% \rawbackslash redefines \ as input to do \rawbackslashxx.
		5417	{\catcode`\\=\active
		5418	@gdef@rawbackslash{@let\=@rawbackslashxx }}
		5419
		5420	% \normalbackslash outputs one backslash in fixed width font.
		5421	\def\normalbackslash{{\tt\rawbackslashxx}}
		5422
		5423	% Say @foo, not \foo, in error messages.
		5424	\escapechar=`\@
		5425
		5426	% \catcode 17=0 % Define control-q
		5427	\catcode`\\=\active
		5428
		5429	% Used sometimes to turn off (effectively) the active characters
		5430	% even after parsing them.
		5431	@def@turnoffactive{@let"=@normaldoublequote
		5432	@let\=@realbackslash
		5433	@let~=@normaltilde
		5434	@let^=@normalcaret
		5435	@let_=@normalunderscore
		5436	@let\|=@normalverticalbar
		5437	@let<=@normalless
		5438	@let>=@normalgreater
		5439	@let+=@normalplus}
		5440
		5441	@def@normalturnoffactive{@let"=@normaldoublequote
		5442	@let\=@normalbackslash
		5443	@let~=@normaltilde
		5444	@let^=@normalcaret
		5445	@let_=@normalunderscore
		5446	@let\|=@normalverticalbar
		5447	@let<=@normalless
		5448	@let>=@normalgreater
		5449	@let+=@normalplus}
		5450
		5451	% Make _ and + \other characters, temporarily.
		5452	% This is canceled by @fixbackslash.
		5453	@otherifyactive
		5454
		5455	% If a .fmt file is being used, we don't want the `\input texinfo' to show up.
		5456	% That is what \eatinput is for; after that, the `\' should revert to printing
		5457	% a backslash.
		5458	%
		5459	@gdef@eatinput input texinfo{@fixbackslash}
		5460	@global@let\ = @eatinput
		5461
		5462	% On the other hand, perhaps the file did not have a `\input texinfo'. Then
		5463	% the first `\{ in the file would cause an error. This macro tries to fix
		5464	% that, assuming it is called before the first `\' could plausibly occur.
		5465	% Also back turn on active characters that might appear in the input
		5466	% file name, in case not using a pre-dumped format.
		5467	%
		5468	@gdef@fixbackslash{@ifx\@eatinput @let\ = @normalbackslash @fi
		5469	@catcode`+=@active @catcode`@_=@active}
		5470
		5471	% These look ok in all fonts, so just make them not special. The @rm below
		5472	% makes sure that the current font starts out as the newly loaded cmr10
		5473	@catcode`@$=@other @catcode`@%=@other @catcode`@&=@other @catcode`@#=@other
		5474
		5475	@textfonts
		5476	@rm
		5477
		5478	@c Local variables:
		5479	@c eval: (add-hook 'write-file-hooks 'time-stamp)
		5480	@c page-delimiter: "^\\\\message"
		5481	@c time-stamp-start: "def\\\\texinfoversion{"
		5482	@c time-stamp-format: "%:y-%02m-%02d"
		5483	@c time-stamp-end: "}"
		5484	@c End:

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