1 % texinfo.tex -- TeX macros to handle Texinfo files.
3 % Load plain if necessary, i.e., if running under initex.
4 \expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
6 \def\texinfoversion{2004-03-11.15}
8 % Copyright (C) 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
9 % 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
12 % This texinfo.tex file is free software; you can redistribute it and/or
13 % modify it under the terms of the GNU General Public License as
14 % published by the Free Software Foundation; either version 2, or (at
15 % your option) any later version.
17 % This texinfo.tex file is distributed in the hope that it will be
18 % useful, but WITHOUT ANY WARRANTY; without even the implied warranty
19 % of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 % General Public License for more details.
22 % You should have received a copy of the GNU General Public License
23 % along with this texinfo.tex file; see the file COPYING. If not, write
24 % to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
25 % Boston, MA 02111-1307, USA.
27 % As a special exception, when this file is read by TeX when processing
28 % a Texinfo source document, you may use the result without
29 % restriction. (This has been our intent since Texinfo was invented.)
31 % Please try the latest version of texinfo.tex before submitting bug
32 % reports; you can get the latest version from:
33 % http://www.gnu.org/software/texinfo/ (the Texinfo home page), or
34 % ftp://tug.org/tex/texinfo.tex
35 % (and all CTAN mirrors, see http://www.ctan.org).
36 % The texinfo.tex in any given distribution could well be out
37 % of date, so if that's what you're using, please check.
39 % Send bug reports to bug-texinfo@gnu.org. Please include including a
40 % complete document in each bug report with which we can reproduce the
41 % problem. Patches are, of course, greatly appreciated.
43 % To process a Texinfo manual with TeX, it's most reliable to use the
44 % texi2dvi shell script that comes with the distribution. For a simple
45 % manual foo.texi, however, you can get away with this:
50 % dvips foo.dvi -o # or whatever; this makes foo.ps.
51 % The extra TeX runs get the cross-reference information correct.
52 % Sometimes one run after texindex suffices, and sometimes you need more
53 % than two; texi2dvi does it as many times as necessary.
55 % It is possible to adapt texinfo.tex for other languages, to some
56 % extent. You can get the existing language-specific files from the
57 % full Texinfo distribution.
59 % The GNU Texinfo home page is http://www.gnu.org/software/texinfo.
62 \message{Loading texinfo [version \texinfoversion]:}
64 % If in a .fmt file, print the version number
65 % and turn on active characters that we couldn't do earlier because
66 % they might have appeared in the input file name.
67 \everyjob{\message{[Texinfo version \texinfoversion]}%
68 \catcode`+=\active \catcode`\_=\active}
73 % We never want plain's \outer definition of \+ in Texinfo.
74 % For @tex, we can use \tabalign.
77 % Save some plain tex macros whose names we will redefine.
79 \let\ptexbullet=\bullet
87 \let\ptexfootnote=\footnote
91 \let\ptexindent=\indent
92 \let\ptexnoindent=\noindent
93 \let\ptexinsert=\insert
102 % If this character appears in an error message or help string, it
103 % starts a new line in the output.
106 % Use TeX 3.0's \inputlineno to get the line number, for better error
107 % messages, but if we're using an old version of TeX, don't do anything.
109 \ifx\inputlineno\thisisundefined
110 \let\linenumber = \empty % Pre-3.0.
112 \def\linenumber{l.\the\inputlineno:\space}
115 % Set up fixed words for English if not already set.
116 \ifx\putwordAppendix\undefined \gdef\putwordAppendix{Appendix}\fi
117 \ifx\putwordChapter\undefined \gdef\putwordChapter{Chapter}\fi
118 \ifx\putwordfile\undefined \gdef\putwordfile{file}\fi
119 \ifx\putwordin\undefined \gdef\putwordin{in}\fi
120 \ifx\putwordIndexIsEmpty\undefined \gdef\putwordIndexIsEmpty{(Index is empty)}\fi
121 \ifx\putwordIndexNonexistent\undefined \gdef\putwordIndexNonexistent{(Index is nonexistent)}\fi
122 \ifx\putwordInfo\undefined \gdef\putwordInfo{Info}\fi
123 \ifx\putwordInstanceVariableof\undefined \gdef\putwordInstanceVariableof{Instance Variable of}\fi
124 \ifx\putwordMethodon\undefined \gdef\putwordMethodon{Method on}\fi
125 \ifx\putwordNoTitle\undefined \gdef\putwordNoTitle{No Title}\fi
126 \ifx\putwordof\undefined \gdef\putwordof{of}\fi
127 \ifx\putwordon\undefined \gdef\putwordon{on}\fi
128 \ifx\putwordpage\undefined \gdef\putwordpage{page}\fi
129 \ifx\putwordsection\undefined \gdef\putwordsection{section}\fi
130 \ifx\putwordSection\undefined \gdef\putwordSection{Section}\fi
131 \ifx\putwordsee\undefined \gdef\putwordsee{see}\fi
132 \ifx\putwordSee\undefined \gdef\putwordSee{See}\fi
133 \ifx\putwordShortTOC\undefined \gdef\putwordShortTOC{Short Contents}\fi
134 \ifx\putwordTOC\undefined \gdef\putwordTOC{Table of Contents}\fi
136 \ifx\putwordMJan\undefined \gdef\putwordMJan{January}\fi
137 \ifx\putwordMFeb\undefined \gdef\putwordMFeb{February}\fi
138 \ifx\putwordMMar\undefined \gdef\putwordMMar{March}\fi
139 \ifx\putwordMApr\undefined \gdef\putwordMApr{April}\fi
140 \ifx\putwordMMay\undefined \gdef\putwordMMay{May}\fi
141 \ifx\putwordMJun\undefined \gdef\putwordMJun{June}\fi
142 \ifx\putwordMJul\undefined \gdef\putwordMJul{July}\fi
143 \ifx\putwordMAug\undefined \gdef\putwordMAug{August}\fi
144 \ifx\putwordMSep\undefined \gdef\putwordMSep{September}\fi
145 \ifx\putwordMOct\undefined \gdef\putwordMOct{October}\fi
146 \ifx\putwordMNov\undefined \gdef\putwordMNov{November}\fi
147 \ifx\putwordMDec\undefined \gdef\putwordMDec{December}\fi
149 \ifx\putwordDefmac\undefined \gdef\putwordDefmac{Macro}\fi
150 \ifx\putwordDefspec\undefined \gdef\putwordDefspec{Special Form}\fi
151 \ifx\putwordDefvar\undefined \gdef\putwordDefvar{Variable}\fi
152 \ifx\putwordDefopt\undefined \gdef\putwordDefopt{User Option}\fi
153 \ifx\putwordDeffunc\undefined \gdef\putwordDeffunc{Function}\fi
155 % In some macros, we cannot use the `\? notation---the left quote is
156 % in some cases the escape char.
157 \chardef\colonChar = `\:
158 \chardef\commaChar = `\,
159 \chardef\dotChar = `\.
160 \chardef\exclamChar= `\!
161 \chardef\questChar = `\?
162 \chardef\semiChar = `\;
163 \chardef\underChar = `\_
165 \chardef\spaceChar = `\ %
166 \chardef\spacecat = 10
167 \def\spaceisspace{\catcode\spaceChar=\spacecat}
173 % The following is used inside several \edef's.
174 \def\makecsname#1{\expandafter\noexpand\csname#1\endcsname}
178 Flor-i-da Ghost-script Ghost-view Mac-OS Post-Script
179 ap-pen-dix bit-map bit-maps
180 data-base data-bases eshell fall-ing half-way long-est man-u-script
181 man-u-scripts mini-buf-fer mini-buf-fers over-view par-a-digm
182 par-a-digms rath-er rec-tan-gu-lar ro-bot-ics se-vere-ly set-up spa-ces
184 stand-alone strong-est time-stamp time-stamps which-ever white-space
185 wide-spread wrap-around
188 % Margin to add to right of even pages, to left of odd pages.
189 \newdimen\bindingoffset
190 \newdimen\normaloffset
191 \newdimen\pagewidth \newdimen\pageheight
193 % For a final copy, take out the rectangles
194 % that mark overfull boxes (in case you have decided
195 % that the text looks ok even though it passes the margin).
197 \def\finalout{\overfullrule=0pt}
199 % @| inserts a changebar to the left of the current line. It should
200 % surround any changed text. This approach does *not* work if the
201 % change spans more than two lines of output. To handle that, we would
202 % have adopt a much more difficult approach (putting marks into the main
203 % vertical list for the beginning and end of each change).
206 % \vadjust can only be used in horizontal mode.
209 % Append this vertical mode material after the current line in the output.
211 % We want to insert a rule with the height and depth of the current
212 % leading; that is exactly what \strutbox is supposed to record.
215 % \vadjust-items are inserted at the left edge of the type. So
216 % the \llap here moves out into the left-hand margin.
219 % For a thicker or thinner bar, change the `1pt'.
220 \vrule height\baselineskip width1pt
222 % This is the space between the bar and the text.
228 % Sometimes it is convenient to have everything in the transcript file
229 % and nothing on the terminal. We don't just call \tracingall here,
230 % since that produces some useless output on the terminal. We also make
231 % some effort to order the tracing commands to reduce output in the log
232 % file; cf. trace.sty in LaTeX.
234 \def\gloggingall{\begingroup \globaldefs = 1 \loggingall \endgroup}%
238 \tracinglostchars2 % 2 gives us more in etex
243 \showboxbreadth\maxdimen \showboxdepth\maxdimen
244 \ifx\eTeXversion\undefined\else % etex gives us more logging
251 \tracingcommands3 % 3 gives us more in etex
255 % add check for \lastpenalty to plain's definitions. If the last thing
256 % we did was a \nobreak, we don't want to insert more space.
258 \def\smallbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\smallskipamount
259 \removelastskip\penalty-50\smallskip\fi\fi}
260 \def\medbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\medskipamount
261 \removelastskip\penalty-100\medskip\fi\fi}
262 \def\bigbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\bigskipamount
263 \removelastskip\penalty-200\bigskip\fi\fi}
265 % For @cropmarks command.
266 % Do @cropmarks to get crop marks.
269 \let\cropmarks = \cropmarkstrue
271 % Dimensions to add cropmarks at corners.
272 % Added by P. A. MacKay, 12 Nov. 1986
274 \newdimen\outerhsize \newdimen\outervsize % set by the paper size routines
275 \newdimen\cornerlong \cornerlong=1pc
276 \newdimen\cornerthick \cornerthick=.3pt
277 \newdimen\topandbottommargin \topandbottommargin=.75in
279 % Main output routine.
281 \output = {\onepageout{\pagecontents\PAGE}}
286 % \onepageout takes a vbox as an argument. Note that \pagecontents
287 % does insertions, but you have to call it yourself.
289 \ifcropmarks \hoffset=0pt \else \hoffset=\normaloffset \fi
291 \ifodd\pageno \advance\hoffset by \bindingoffset
292 \else \advance\hoffset by -\bindingoffset\fi
294 % Do this outside of the \shipout so @code etc. will be expanded in
295 % the headline as they should be, not taken literally (outputting ''code).
296 \setbox\headlinebox = \vbox{\let\hsize=\pagewidth \makeheadline}%
297 \setbox\footlinebox = \vbox{\let\hsize=\pagewidth \makefootline}%
300 % Have to do this stuff outside the \shipout because we want it to
301 % take effect in \write's, yet the group defined by the \vbox ends
302 % before the \shipout runs.
304 \escapechar = `\\ % use backslash in output files.
305 \indexdummies % don't expand commands in the output.
306 \normalturnoffactive % \ in index entries must not stay \, e.g., if
307 % the page break happens to be in the middle of an example.
309 % Do this early so pdf references go to the beginning of the page.
310 \ifpdfmakepagedest \pdfdest name{\the\pageno} xyz\fi
312 \ifcropmarks \vbox to \outervsize\bgroup
314 \vskip-\topandbottommargin
316 \line{\ewtop\hfil\ewtop}%
319 \vbox{\moveleft\cornerthick\nstop}%
321 \vbox{\moveright\cornerthick\nstop}%
324 \vskip\topandbottommargin
326 \hfil % center the page within the outer (page) hsize.
327 \ifodd\pageno\hskip\bindingoffset\fi
333 \ifdim\ht\footlinebox > 0pt
334 % Only leave this space if the footline is nonempty.
335 % (We lessened \vsize for it in \oddfootingxxx.)
336 % The \baselineskip=24pt in plain's \makefootline has no effect.
337 \vskip 2\baselineskip
342 \egroup % end of \vbox\bgroup
343 \hfil\egroup % end of (centering) \line\bgroup
344 \vskip\topandbottommargin plus1fill minus1fill
345 \boxmaxdepth = \cornerthick
348 \vbox{\moveleft\cornerthick\nsbot}%
350 \vbox{\moveright\cornerthick\nsbot}%
353 \line{\ewbot\hfil\ewbot}%
355 \egroup % \vbox from first cropmarks clause
357 }% end of \shipout\vbox
358 }% end of group with \normalturnoffactive
360 \ifnum\outputpenalty>-20000 \else\dosupereject\fi
363 \newinsert\margin \dimen\margin=\maxdimen
365 \def\pagebody#1{\vbox to\pageheight{\boxmaxdepth=\maxdepth #1}}
367 \gdef\pagecontents#1{\ifvoid\topins\else\unvbox\topins\fi
368 % marginal hacks, juha@viisa.uucp (Juha Takala)
369 \ifvoid\margin\else % marginal info is present
370 \rlap{\kern\hsize\vbox to\z@{\kern1pt\box\margin \vss}}\fi
371 \dimen@=\dp#1 \unvbox#1
372 \ifvoid\footins\else\vskip\skip\footins\footnoterule \unvbox\footins\fi
373 \ifr@ggedbottom \kern-\dimen@ \vfil \fi}
376 % Here are the rules for the cropmarks. Note that they are
377 % offset so that the space between them is truly \outerhsize or \outervsize
378 % (P. A. MacKay, 12 November, 1986)
380 \def\ewtop{\vrule height\cornerthick depth0pt width\cornerlong}
382 {\hrule height\cornerthick depth\cornerlong width\cornerthick}}
383 \def\ewbot{\vrule height0pt depth\cornerthick width\cornerlong}
385 {\hrule height\cornerlong depth\cornerthick width\cornerthick}}
387 % Parse an argument, then pass it to #1. The argument is the rest of
388 % the input line (except we remove a trailing comment). #1 should be a
389 % macro which expects an ordinary undelimited TeX argument.
391 \def\parsearg{\parseargusing{}}
392 \def\parseargusing#1#2{%
398 \parseargline\empty% Insert the \empty token, see \finishparsearg below.
402 \gdef\parseargline#1^^M{%
403 \endgroup % End of the group started in \parsearg.
404 \argremovecomment #1\comment\ArgTerm%
408 % First remove any @comment, then any @c comment.
409 \def\argremovecomment#1\comment#2\ArgTerm{\argremovec #1\c\ArgTerm}
410 \def\argremovec#1\c#2\ArgTerm{\argcheckspaces#1\^^M\ArgTerm}
412 % Each occurence of `\^^M' or `<space>\^^M' is replaced by a single space.
414 % \argremovec might leave us with trailing space, e.g.,
415 % @end itemize @c foo
416 % This space token undergoes the same procedure and is eventually removed
417 % by \finishparsearg.
419 \def\argcheckspaces#1\^^M{\argcheckspacesX#1\^^M \^^M}
420 \def\argcheckspacesX#1 \^^M{\argcheckspacesY#1\^^M}
421 \def\argcheckspacesY#1\^^M#2\^^M#3\ArgTerm{%
424 % We cannot use \next here, as it holds the macro to run;
425 % thus we reuse \temp.
426 \let\temp\finishparsearg
428 \let\temp\argcheckspaces
430 % Put the space token in:
434 % If a _delimited_ argument is enclosed in braces, they get stripped; so
435 % to get _exactly_ the rest of the line, we had to prevent such situation.
436 % We prepended an \empty token at the very beginning and we expand it now,
437 % just before passing the control to \next.
438 % (Similarily, we have to think about #3 of \argcheckspacesY above: it is
439 % either the null string, or it ends with \^^M---thus there is no danger
440 % that a pair of braces would be stripped.
442 % But first, we have to remove the trailing space token.
444 \def\finishparsearg#1 \ArgTerm{\expandafter\next\expandafter{#1}}
446 % \parseargdef\foo{...}
447 % is roughly equivalent to
448 % \def\foo{\parsearg\Xfoo}
451 % Actually, I use \csname\string\foo\endcsname, ie. \\foo, as it is my
452 % favourite TeX trick. --kasal, 16nov03
455 \expandafter \doparseargdef \csname\string#1\endcsname #1%
457 \def\doparseargdef#1#2{%
462 % Several utility definitions with active space:
467 % Make each space character in the input produce a normal interword
468 % space in the output. Don't allow a line break at this space, as this
469 % is used only in environments like @example, where each line of input
470 % should produce a line of output anyway.
472 \gdef\sepspaces{\obeyspaces\let =\tie}
474 % If an index command is used in an @example environment, any spaces
475 % therein should become regular spaces in the raw index file, not the
476 % expansion of \tie (\leavevmode \penalty \@M \ ).
477 \gdef\unsepspaces{\let =\space}
481 \def\flushcr{\ifx\par\lisppar \def\next##1{}\else \let\next=\relax \fi \next}
483 % Define the framework for environments in texinfo.tex. It's used like this:
488 % It's the responsibility of \envdef to insert \begingroup before the
489 % actual body; @end closes the group after calling \Efoo. \envdef also
490 % defines \thisenv, so the current environment is known; @end checks
491 % whether the environment name matches. The \checkenv macro can also be
492 % used to check whether the current environment is the one expected.
494 % Non-false conditionals (@iftex, @ifset) don't fit into this, so they
495 % are not treated as enviroments; they don't open a group. (The
496 % implementation of @end takes care not to call \endgroup in this
500 % At runtime, environments start with this:
501 \def\startenvironment#1{\begingroup\def\thisenv{#1}}
505 % ... but they get defined via ``\envdef\foo{...}'':
506 \long\def\envdef#1#2{\def#1{\startenvironment#1#2}}
507 \def\envparseargdef#1#2{\parseargdef#1{\startenvironment#1#2}}
509 % Check whether we're in the right environment:
518 % Evironment mismatch, #1 expected:
521 \errmessage{This command can appear only \inenvironment\temp,
522 not \inenvironment\thisenv}%
524 \def\inenvironment#1{%
526 out of any environment%
528 in environment \expandafter\string#1%
532 % @end foo executes the definition of \Efoo.
533 % But first, it executes a specialized version of \checkenv
536 \if 1\csname iscond.#1\endcsname
538 % The general wording of \badenverr may not be ideal, but... --kasal, 06nov03
539 \expandafter\checkenv\csname#1\endcsname
540 \csname E#1\endcsname
545 \newhelp\EMsimple{Press RETURN to continue.}
548 %% Simple single-character @ commands
551 % Kludge this until the fonts are right (grr).
554 % This is turned off because it was never documented
555 % and you can use @w{...} around a quote to suppress ligatures.
556 %% Define @` and @' to be the same as ` and '
557 %% but suppressing ligatures.
561 % Used to generate quoted braces.
562 \def\mylbrace {{\tt\char123}}
563 \def\myrbrace {{\tt\char125}}
567 % Definitions to produce \{ and \} commands for indices,
568 % and @{ and @} for the aux file.
569 \catcode`\{ = \other \catcode`\} = \other
570 \catcode`\[ = 1 \catcode`\] = 2
571 \catcode`\! = 0 \catcode`\\ = \other
574 !gdef!lbraceatcmd[@{]%
575 !gdef!rbraceatcmd[@}]%
578 % @comma{} to avoid , parsing problems.
581 % Accents: @, @dotaccent @ringaccent @ubaraccent @udotaccent
582 % Others are defined by plain TeX: @` @' @" @^ @~ @= @u @v @H.
585 \def\ringaccent#1{{\accent23 #1}}
590 % Other special characters: @questiondown @exclamdown @ordf @ordm
591 % Plain TeX defines: @AA @AE @O @OE @L (plus lowercase versions) @ss.
592 \def\questiondown{?`}
594 \def\ordf{\leavevmode\raise1ex\hbox{\selectfonts\lllsize \underbar{a}}}
595 \def\ordm{\leavevmode\raise1ex\hbox{\selectfonts\lllsize \underbar{o}}}
597 % Dotless i and dotless j, used for accents.
602 \ifx\temp\imacro \ptexi
603 \else\ifx\temp\jmacro \j
604 \else \errmessage{@dotless can be used only with i or j}%
608 % The \TeX{} logo, as in plain, but resetting the spacing so that a
609 % period following counts as ending a sentence. (Idea found in latex.)
611 \edef\TeX{\TeX \spacefactor=3000 }
613 % @LaTeX{} logo. Not quite the same results as the definition in
614 % latex.ltx, since we use a different font for the raised A; it's most
615 % convenient for us to use an explicitly smaller font, rather than using
616 % the \scriptstyle font (since we don't reset \scriptstyle and
617 % \scriptscriptstyle).
622 \vbox to \ht0{\hbox{\selectfonts\lllsize A}\vss}}%
627 % Be sure we're in horizontal mode when doing a tie, since we make space
628 % equivalent to this in @example-like environments. Otherwise, a space
629 % at the beginning of a line will start with \penalty -- and
630 % since \penalty is valid in vertical mode, we'd end up putting the
631 % penalty on the vertical list instead of in the new paragraph.
633 % Avoid using \@M directly, because that causes trouble
634 % if the definition is written into an index file.
635 \global\let\tiepenalty = \@M
636 \gdef\tie{\leavevmode\penalty\tiepenalty\ }
639 % @: forces normal size whitespace following.
640 \def\:{\spacefactor=1000 }
642 % @* forces a line break.
643 \def\*{\hfil\break\hbox{}\ignorespaces}
645 % @/ allows a line break.
648 % @. is an end-of-sentence period.
649 \def\.{.\spacefactor=3000 }
651 % @! is an end-of-sentence bang.
652 \def\!{!\spacefactor=3000 }
654 % @? is an end-of-sentence query.
655 \def\?{?\spacefactor=3000 }
657 % @w prevents a word break. Without the \leavevmode, @w at the
658 % beginning of a paragraph, when TeX is still in vertical mode, would
659 % produce a whole line of output instead of starting the paragraph.
660 \def\w#1{\leavevmode\hbox{#1}}
662 % @group ... @end group forces ... to be all on one page, by enclosing
663 % it in a TeX vbox. We use \vtop instead of \vbox to construct the box
664 % to keep its height that of a normal line. According to the rules for
665 % \topskip (p.114 of the TeXbook), the glue inserted is
666 % max (\topskip - \ht (first item), 0). If that height is large,
667 % therefore, no glue is inserted, and the space between the headline and
668 % the text is small, which looks bad.
670 % Another complication is that the group might be very large. This can
671 % cause the glue on the previous page to be unduly stretched, because it
672 % does not have much material. In this case, it's better to add an
673 % explicit \vfill so that the extra space is at the bottom. The
674 % threshold for doing this is if the group is more than \vfilllimit
675 % percent of a page (\vfilllimit can be changed inside of @tex).
681 \ifnum\catcode`\^^M=\active \else
682 \errhelp = \groupinvalidhelp
683 \errmessage{@group invalid in context where filling is enabled}%
687 \setbox\groupbox = \vtop\bgroup
688 % Do @comment since we are called inside an environment such as
689 % @example, where each end-of-line in the input causes an
690 % end-of-line in the output. We don't want the end-of-line after
691 % the `@group' to put extra space in the output. Since @group
692 % should appear on a line by itself (according to the Texinfo
693 % manual), we don't worry about eating any user text.
697 % The \vtop produces a box with normal height and large depth; thus, TeX puts
698 % \baselineskip glue before it, and (when the next line of text is done)
699 % \lineskip glue after it. Thus, space below is not quite equal to space
700 % above. But it's pretty close.
702 % To get correct interline space between the last line of the group
703 % and the first line afterwards, we have to propagate \prevdepth.
704 \endgraf % Not \par, as it may have been set to \lisppar.
705 \global\dimen1 = \prevdepth
706 \egroup % End the \vtop.
707 % \dimen0 is the vertical size of the group's box.
708 \dimen0 = \ht\groupbox \advance\dimen0 by \dp\groupbox
709 % \dimen2 is how much space is left on the page (more or less).
710 \dimen2 = \pageheight \advance\dimen2 by -\pagetotal
711 % if the group doesn't fit on the current page, and it's a big big
712 % group, force a page break.
713 \ifdim \dimen0 > \dimen2
714 \ifdim \pagetotal < \vfilllimit\pageheight
723 % TeX puts in an \escapechar (i.e., `@') at the beginning of the help
724 % message, so this ends up printing `@group can only ...'.
726 \newhelp\groupinvalidhelp{%
727 group can only be used in environments such as @example,^^J%
728 where each line of input produces a line of output.}
730 % @need space-in-mils
731 % forces a page break if there is not space-in-mils remaining.
733 \newdimen\mil \mil=0.001in
735 % Old definition--didn't work.
736 %\parseargdef\need{\par %
737 %% This method tries to make TeX break the page naturally
738 %% if the depth of the box does not fit.
740 %\vtop to #1\mil{\vfil}\kern -#1\mil\nobreak
745 % Ensure vertical mode, so we don't make a big box in the middle of a
749 % If the @need value is less than one line space, it's useless.
751 \dimen2 = \ht\strutbox
752 \advance\dimen2 by \dp\strutbox
753 \ifdim\dimen0 > \dimen2
755 % Do a \strut just to make the height of this box be normal, so the
756 % normal leading is inserted relative to the preceding line.
757 % And a page break here is fine.
758 \vtop to #1\mil{\strut\vfil}%
760 % TeX does not even consider page breaks if a penalty added to the
761 % main vertical list is 10000 or more. But in order to see if the
762 % empty box we just added fits on the page, we must make it consider
763 % page breaks. On the other hand, we don't want to actually break the
764 % page after the empty box. So we use a penalty of 9999.
766 % There is an extremely small chance that TeX will actually break the
767 % page at this \penalty, if there are no other feasible breakpoints in
768 % sight. (If the user is using lots of big @group commands, which
769 % almost-but-not-quite fill up a page, TeX will have a hard time doing
770 % good page breaking, for example.) However, I could not construct an
771 % example where a page broke at this \penalty; if it happens in a real
772 % document, then we can reconsider our strategy.
775 % Back up by the size of the box, whether we did a page break or not.
778 % Do not allow a page break right after this kern.
783 % @br forces paragraph break (and is undocumented).
787 % @page forces the start of a new page.
789 \def\page{\par\vfill\supereject}
792 % outputs text on separate line in roman font, starting at standard page margin
794 % This records the amount of indent in the innermost environment.
795 % That's how much \exdent should take out.
796 \newskip\exdentamount
798 % This defn is used inside fill environments such as @defun.
799 \parseargdef\exdent{\hfil\break\hbox{\kern -\exdentamount{\rm#1}}\hfil\break}
801 % This defn is used inside nofill environments such as @example.
802 \parseargdef\nofillexdent{{\advance \leftskip by -\exdentamount
803 \leftline{\hskip\leftskip{\rm#1}}}}
805 % @inmargin{WHICH}{TEXT} puts TEXT in the WHICH margin next to the current
806 % paragraph. For more general purposes, use the \margin insertion
807 % class. WHICH is `l' or `r'.
809 \newskip\inmarginspacing \inmarginspacing=1cm
810 \def\strutdepth{\dp\strutbox}
812 \def\doinmargin#1#2{\strut\vadjust{%
815 \vtop to \strutdepth{%
816 \baselineskip=\strutdepth
818 % if you have multiple lines of stuff to put here, you'll need to
819 % make the vbox yourself of the appropriate size.
821 \llap{\ignorespaces #2\hskip\inmarginspacing}%
823 \rlap{\hskip\hsize \hskip\inmarginspacing \ignorespaces #2}%
828 \def\inleftmargin{\doinmargin l}
829 \def\inrightmargin{\doinmargin r}
831 % @inmargin{TEXT [, RIGHT-TEXT]}
832 % (if RIGHT-TEXT is given, use TEXT for left page, RIGHT-TEXT for right;
833 % else use TEXT for both).
835 \def\inmargin#1{\parseinmargin #1,,\finish}
836 \def\parseinmargin#1,#2,#3\finish{% not perfect, but better than nothing.
837 \setbox0 = \hbox{\ignorespaces #2}%
839 \def\lefttext{#1}% have both texts
842 \def\lefttext{#1}% have only one text
847 \def\temp{\inrightmargin\righttext}% odd page -> outside is right margin
849 \def\temp{\inleftmargin\lefttext}%
854 % @include file insert text of that file as input.
856 \def\include{\parseargusing\filenamecatcodes\includezzz}
862 \def\temp{\input #1 }%
867 \def\filenamecatcodes{%
879 \def\pushthisfilestack{%
880 \expandafter\pushthisfilestackX\popthisfilestack\StackTerm
882 \def\pushthisfilestackX{%
883 \expandafter\pushthisfilestackY\thisfile\StackTerm
885 \def\pushthisfilestackY #1\StackTerm #2\StackTerm {%
886 \gdef\popthisfilestack{\gdef\thisfile{#1}\gdef\popthisfilestack{#2}}%
889 \def\popthisfilestack{\errthisfilestackempty}
890 \def\errthisfilestackempty{\errmessage{Internal error:
891 the stack of filenames is empty.}}
896 % outputs that line, centered.
898 \parseargdef\center{%
904 \next{\hfil \ignorespaces#1\unskip \hfil}%
909 \advance\hsize by -\leftskip
910 \advance\hsize by -\rightskip
915 \def\centerV#1{\line{\kern\leftskip #1\kern\rightskip}}
917 % @sp n outputs n lines of vertical space
919 \parseargdef\sp{\vskip #1\baselineskip}
921 % @comment ...line which is ignored...
922 % @c is the same as @comment
923 % @ignore ... @end ignore is another way to write a comment
925 \def\comment{\begingroup \catcode`\^^M=\other%
926 \catcode`\@=\other \catcode`\{=\other \catcode`\}=\other%
928 {\catcode`\^^M=\other \gdef\commentxxx#1^^M{\endgroup}}
932 % @paragraphindent NCHARS
933 % We'll use ems for NCHARS, close enough.
934 % NCHARS can also be the word `asis' or `none'.
935 % We cannot feasibly implement @paragraphindent asis, though.
937 \def\asisword{asis} % no translation, these are keywords
940 \parseargdef\paragraphindent{%
945 \defaultparindent = 0pt
947 \defaultparindent = #1em
950 \parindent = \defaultparindent
953 % @exampleindent NCHARS
954 % We'll use ems for NCHARS like @paragraphindent.
955 % It seems @exampleindent asis isn't necessary, but
956 % I preserve it to make it similar to @paragraphindent.
957 \parseargdef\exampleindent{%
964 \lispnarrowing = #1em
969 % @firstparagraphindent WORD
970 % If WORD is `none', then suppress indentation of the first paragraph
971 % after a section heading. If WORD is `insert', then do indent at such
974 % The paragraph indentation is suppressed or not by calling
975 % \suppressfirstparagraphindent, which the sectioning commands do.
976 % We switch the definition of this back and forth according to WORD.
977 % By default, we suppress indentation.
979 \def\suppressfirstparagraphindent{\dosuppressfirstparagraphindent}
980 \def\insertword{insert}
982 \parseargdef\firstparagraphindent{%
985 \let\suppressfirstparagraphindent = \dosuppressfirstparagraphindent
986 \else\ifx\temp\insertword
987 \let\suppressfirstparagraphindent = \relax
990 \errmessage{Unknown @firstparagraphindent option `\temp'}%
994 % Here is how we actually suppress indentation. Redefine \everypar to
995 % \kern backwards by \parindent, and then reset itself to empty.
997 % We also make \indent itself not actually do anything until the next
1000 \gdef\dosuppressfirstparagraphindent{%
1002 \restorefirstparagraphindent
1006 \restorefirstparagraphindent
1009 \global\everypar = {%
1011 \restorefirstparagraphindent
1015 \gdef\restorefirstparagraphindent{%
1016 \global \let \indent = \ptexindent
1017 \global \let \noindent = \ptexnoindent
1018 \global \everypar = {}%
1022 % @asis just yields its argument. Used with @table, for example.
1026 % @math outputs its argument in math mode.
1028 % One complication: _ usually means subscripts, but it could also mean
1029 % an actual _ character, as in @math{@var{some_variable} + 1}. So make
1030 % _ active, and distinguish by seeing if the current family is \slfam,
1031 % which is what @var uses.
1033 \catcode\underChar = \active
1034 \gdef\mathunderscore{%
1035 \catcode\underChar=\active
1036 \def_{\ifnum\fam=\slfam \_\else\sb\fi}%
1039 % Another complication: we want \\ (and @\) to output a \ character.
1040 % FYI, plain.tex uses \\ as a temporary control sequence (why?), but
1041 % this is not advertised and we don't care. Texinfo does not
1042 % otherwise define @\.
1044 % The \mathchar is class=0=ordinary, family=7=ttfam, position=5C=\.
1045 \def\mathbackslash{\ifnum\fam=\ttfam \mathchar"075C \else\backslash \fi}
1050 \let\\ = \mathbackslash
1054 \def\finishmath#1{#1$\endgroup} % Close the group opened by \tex.
1056 % Some active characters (such as <) are spaced differently in math.
1057 % We have to reset their definitions in case the @math was an argument
1058 % to a command which sets the catcodes (such as @item or @section).
1061 \catcode`^ = \active
1062 \catcode`< = \active
1063 \catcode`> = \active
1064 \catcode`+ = \active
1073 % @bullet and @minus need the same treatment as @math, just above.
1074 \def\bullet{$\ptexbullet$}
1077 % @dots{} outputs an ellipsis using the current font.
1078 % We do .5em per period so that it has the same spacing in a typewriter
1079 % font as three actual period characters.
1084 \hskip 0pt plus 0.25fil
1086 \hskip 0pt plus 0.5fil
1090 % @enddots{} is an end-of-sentence ellipsis.
1097 % @comma{} is so commas can be inserted into text without messing up
1098 % Texinfo's parsing.
1102 % @refill is a no-op.
1105 % If working on a large document in chapters, it is convenient to
1106 % be able to disable indexing, cross-referencing, and contents, for test runs.
1107 % This is done with @novalidate (before @setfilename).
1109 \newif\iflinks \linkstrue % by default we want the aux files.
1110 \let\novalidate = \linksfalse
1112 % @setfilename is done at the beginning of every texinfo file.
1113 % So open here the files we need to have open while reading the input.
1114 % This makes it possible to make a .fmt file for texinfo.
1116 \fixbackslash % Turn off hack to swallow `\input texinfo'.
1119 % Open the new aux file. TeX will close it automatically at exit.
1120 \immediate\openout\auxfile=\jobname.aux
1121 \fi % \openindices needs to do some work in any case.
1123 \let\setfilename=\comment % Ignore extra @setfilename cmds.
1125 % If texinfo.cnf is present on the system, read it.
1126 % Useful for site-wide @afourpaper, etc.
1127 \openin 1 texinfo.cnf
1128 \ifeof 1 \else \input texinfo.cnf \fi
1131 \comment % Ignore the actual filename.
1134 % Called from \setfilename.
1146 \outer\def\bye{\pagealignmacro\tracingstats=1\ptexend}
1150 % adobe `portable' document format
1154 \newcount\filenamelength
1163 \newif\ifpdfmakepagedest
1165 % when pdftex is run in dvi mode, \pdfoutput is defined (so \pdfoutput=1
1166 % can be set). So we test for \relax and 0 as well as \undefined,
1167 % borrowed from ifpdf.sty.
1168 \ifx\pdfoutput\undefined
1170 \ifx\pdfoutput\relax
1181 \pdfcatalog{/PageMode /UseOutlines}%
1182 \def\dopdfimage#1#2#3{%
1183 \def\imagewidth{#2}%
1184 \def\imageheight{#3}%
1185 % without \immediate, pdftex seg faults when the same image is
1186 % included twice. (Version 3.14159-pre-1.0-unofficial-20010704.)
1187 \ifnum\pdftexversion < 14
1190 \immediate\pdfximage
1192 \ifx\empty\imagewidth\else width \imagewidth \fi
1193 \ifx\empty\imageheight\else height \imageheight \fi
1194 \ifnum\pdftexversion<13
1199 \ifnum\pdftexversion < 14 \else
1200 \pdfrefximage \pdflastximage
1203 % We have to set dummies so commands such as @code in a section title
1206 \normalturnoffactive
1207 \pdfdest name{#1} xyz%
1210 \let\linkcolor = \Blue % was Cyan, but that seems light?
1211 \def\endlink{\Black\pdfendlink}
1212 % Adding outlines to PDF; macros for calculating structure of outlines
1213 % come from Petr Olsak
1214 \def\expnumber#1{\expandafter\ifx\csname#1\endcsname\relax 0%
1215 \else \csname#1\endcsname \fi}
1216 \def\advancenumber#1{\tempnum=\expnumber{#1}\relax
1217 \advance\tempnum by 1
1218 \expandafter\xdef\csname#1\endcsname{\the\tempnum}}
1220 % #1 is the section text. #2 is the pdf expression for the number
1221 % of subentries (or empty, for subsubsections). #3 is the node
1222 % text, which might be empty if this toc entry had no
1223 % corresponding node. #4 is the page number.
1225 \def\dopdfoutline#1#2#3#4{%
1226 % Generate a link to the node text if that exists; else, use the
1227 % page number. We could generate a destination for the section
1228 % text in the case where a section has no node, but it doesn't
1229 % seem worthwhile, since most documents are normally structured.
1230 \def\pdfoutlinedest{#3}%
1231 \ifx\pdfoutlinedest\empty \def\pdfoutlinedest{#4}\fi
1233 \pdfoutline goto name{\pdfmkpgn{\pdfoutlinedest}}#2{#1}%
1236 \def\pdfmakeoutlines{%
1238 % Thanh's hack / proper braces in bookmarks
1239 \edef\mylbrace{\iftrue \string{\else}\fi}\let\{=\mylbrace
1240 \edef\myrbrace{\iffalse{\else\string}\fi}\let\}=\myrbrace
1242 % Read toc silently, to get counts of subentries for \pdfoutline.
1243 \def\numchapentry##1##2##3##4{%
1244 \def\thischapnum{##2}%
1245 \let\thissecnum\empty
1246 \let\thissubsecnum\empty
1248 \def\numsecentry##1##2##3##4{%
1249 \advancenumber{chap\thischapnum}%
1250 \def\thissecnum{##2}%
1251 \let\thissubsecnum\empty
1253 \def\numsubsecentry##1##2##3##4{%
1254 \advancenumber{sec\thissecnum}%
1255 \def\thissubsecnum{##2}%
1257 \def\numsubsubsecentry##1##2##3##4{%
1258 \advancenumber{subsec\thissubsecnum}%
1260 \let\thischapnum\empty
1261 \let\thissecnum\empty
1262 \let\thissubsecnum\empty
1264 % use \def rather than \let here because we redefine \chapentry et
1265 % al. a second time, below.
1266 \def\appentry{\numchapentry}%
1267 \def\appsecentry{\numsecentry}%
1268 \def\appsubsecentry{\numsubsecentry}%
1269 \def\appsubsubsecentry{\numsubsubsecentry}%
1270 \def\unnchapentry{\numchapentry}%
1271 \def\unnsecentry{\numsecentry}%
1272 \def\unnsubsecentry{\numsubsecentry}%
1273 \def\unnsubsubsecentry{\numsubsubsecentry}%
1276 % Read toc second time, this time actually producing the outlines.
1277 % The `-' means take the \expnumber as the absolute number of
1278 % subentries, which we calculated on our first read of the .toc above.
1280 % We use the node names as the destinations.
1281 \def\numchapentry##1##2##3##4{%
1282 \dopdfoutline{##1}{count-\expnumber{chap##2}}{##3}{##4}}%
1283 \def\numsecentry##1##2##3##4{%
1284 \dopdfoutline{##1}{count-\expnumber{sec##2}}{##3}{##4}}%
1285 \def\numsubsecentry##1##2##3##4{%
1286 \dopdfoutline{##1}{count-\expnumber{subsec##2}}{##3}{##4}}%
1287 \def\numsubsubsecentry##1##2##3##4{% count is always zero
1288 \dopdfoutline{##1}{}{##3}{##4}}%
1290 % PDF outlines are displayed using system fonts, instead of
1291 % document fonts. Therefore we cannot use special characters,
1292 % since the encoding is unknown. For example, the eogonek from
1293 % Latin 2 (0xea) gets translated to a | character. Info from
1294 % Staszek Wawrykiewicz, 19 Jan 2004 04:09:24 +0100.
1296 % xx to do this right, we have to translate 8-bit characters to
1297 % their "best" equivalent, based on the @documentencoding. Right
1298 % now, I guess we'll just let the pdf reader have its way.
1305 \def\makelinks #1,{%
1306 \def\params{#1}\def\E{END}%
1308 \let\nextmakelinks=\relax
1310 \let\nextmakelinks=\makelinks
1311 \ifnum\lnkcount>0,\fi
1313 \startlink attr{/Border [0 0 0]}
1314 goto name{\pdfmkpgn{\the\pgn}}%
1316 \advance\lnkcount by 1%
1321 \def\picknum#1{\expandafter\pn#1}
1332 \def\ppn#1{\pgn=#1\gobble}
1333 \def\ppnn{\pgn=\first}
1334 \def\pdfmklnk#1{\lnkcount=0\makelinks #1,END,}
1335 \def\skipspaces#1{\def\PP{#1}\def\D{|}%
1336 \ifx\PP\D\let\nextsp\relax
1337 \else\let\nextsp\skipspaces
1338 \ifx\p\space\else\addtokens{\filename}{\PP}%
1339 \advance\filenamelength by 1
1343 \def\getfilename#1{\filenamelength=0\expandafter\skipspaces#1|\relax}
1344 \ifnum\pdftexversion < 14
1345 \let \startlink \pdfannotlink
1347 \let \startlink \pdfstartlink
1351 \normalturnoffactive\def\@{@}%
1352 \makevalueexpandable
1354 \startlink attr{/Border [0 0 0]}%
1355 user{/Subtype /Link /A << /S /URI /URI (#1) >>}%
1357 \def\pdfgettoks#1.{\setbox\boxA=\hbox{\toksA={#1.}\toksB={}\maketoks}}
1358 \def\addtokens#1#2{\edef\addtoks{\noexpand#1={\the#1#2}}\addtoks}
1359 \def\adn#1{\addtokens{\toksC}{#1}\global\countA=1\let\next=\maketoks}
1360 \def\poptoks#1#2|ENDTOKS|{\let\first=#1\toksD={#1}\toksA={#2}}
1362 \expandafter\poptoks\the\toksA|ENDTOKS|\relax
1364 \else\ifx\first1\adn1 \else\ifx\first2\adn2 \else\ifx\first3\adn3
1365 \else\ifx\first4\adn4 \else\ifx\first5\adn5 \else\ifx\first6\adn6
1366 \else\ifx\first7\adn7 \else\ifx\first8\adn8 \else\ifx\first9\adn9
1368 \ifnum0=\countA\else\makelink\fi
1369 \ifx\first.\let\next=\done\else
1371 \addtokens{\toksB}{\the\toksD}
1372 \ifx\first,\addtokens{\toksB}{\space}\fi
1374 \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
1376 \def\makelink{\addtokens{\toksB}%
1377 {\noexpand\pdflink{\the\toksC}}\toksC={}\global\countA=0}
1379 \startlink attr{/Border [0 0 0]} goto name{\pdfmkpgn{#1}}
1380 \linkcolor #1\endlink}
1381 \def\done{\edef\st{\global\noexpand\toksA={\the\toksB}}\st}
1383 \let\pdfmkdest = \gobble
1384 \let\pdfurl = \gobble
1385 \let\endlink = \relax
1386 \let\linkcolor = \relax
1387 \let\pdfmakeoutlines = \relax
1388 \fi % \ifx\pdfoutput
1393 % Change the current font style to #1, remembering it in \curfontstyle.
1394 % For now, we do not accumulate font styles: @b{@i{foo}} prints foo in
1395 % italics, not bold italics.
1397 \def\setfontstyle#1{%
1398 \def\curfontstyle{#1}% not as a control sequence, because we are \edef'd.
1399 \csname ten#1\endcsname % change the current font
1402 % Select #1 fonts with the current style.
1404 \def\selectfonts#1{\csname #1fonts\endcsname \csname\curfontstyle\endcsname}
1406 \def\rm{\fam=0 \setfontstyle{rm}}
1407 \def\it{\fam=\itfam \setfontstyle{it}}
1408 \def\sl{\fam=\slfam \setfontstyle{sl}}
1409 \def\bf{\fam=\bffam \setfontstyle{bf}}
1410 \def\tt{\fam=\ttfam \setfontstyle{tt}}
1412 % Texinfo sort of supports the sans serif font style, which plain TeX does not.
1413 % So we set up a \sf.
1415 \def\sf{\fam=\sffam \setfontstyle{sf}}
1416 \let\li = \sf % Sometimes we call it \li, not \sf.
1418 % We don't need math for this font style.
1419 \def\ttsl{\setfontstyle{ttsl}}
1422 \newdimen\textleading \textleading = 13.2pt
1424 % Set the baselineskip to #1, and the lineskip and strut size
1425 % correspondingly. There is no deep meaning behind these magic numbers
1426 % used as factors; they just match (closely enough) what Knuth defined.
1428 \def\lineskipfactor{.08333}
1429 \def\strutheightpercent{.70833}
1430 \def\strutdepthpercent {.29167}
1433 \normalbaselineskip = #1\relax
1434 \normallineskip = \lineskipfactor\normalbaselineskip
1436 \setbox\strutbox =\hbox{%
1437 \vrule width0pt height\strutheightpercent\baselineskip
1438 depth \strutdepthpercent \baselineskip
1442 % Set the font macro #1 to the font named #2, adding on the
1443 % specified font prefix (normally `cm').
1444 % #3 is the font's design size, #4 is a scale factor
1445 \def\setfont#1#2#3#4{\font#1=\fontprefix#2#3 scaled #4}
1447 % Use cm as the default font prefix.
1448 % To specify the font prefix, you must define \fontprefix
1449 % before you read in texinfo.tex.
1450 \ifx\fontprefix\undefined
1453 % Support font families that don't use the same naming scheme as CM.
1455 \def\rmbshape{bx} %where the normal face is bold
1460 \def\ttslshape{sltt}
1470 % Text fonts (11.2pt, magstep1).
1471 \newcount\mainmagstep
1473 % not really supported.
1474 \mainmagstep=\magstep1
1475 \setfont\textrm\rmshape{12}{1000}
1476 \setfont\texttt\ttshape{12}{1000}
1478 \mainmagstep=\magstephalf
1479 \setfont\textrm\rmshape{10}{\mainmagstep}
1480 \setfont\texttt\ttshape{10}{\mainmagstep}
1482 \setfont\textbf\bfshape{10}{\mainmagstep}
1483 \setfont\textit\itshape{10}{\mainmagstep}
1484 \setfont\textsl\slshape{10}{\mainmagstep}
1485 \setfont\textsf\sfshape{10}{\mainmagstep}
1486 \setfont\textsc\scshape{10}{\mainmagstep}
1487 \setfont\textttsl\ttslshape{10}{\mainmagstep}
1488 \font\texti=cmmi10 scaled \mainmagstep
1489 \font\textsy=cmsy10 scaled \mainmagstep
1491 % A few fonts for @defun names and args.
1492 \setfont\defbf\bfshape{10}{\magstep1}
1493 \setfont\deftt\ttshape{10}{\magstep1}
1494 \setfont\defttsl\ttslshape{10}{\magstep1}
1495 \def\df{\let\tentt=\deftt \let\tenbf = \defbf \let\tenttsl=\defttsl \bf}
1497 % Fonts for indices, footnotes, small examples (9pt).
1498 \setfont\smallrm\rmshape{9}{1000}
1499 \setfont\smalltt\ttshape{9}{1000}
1500 \setfont\smallbf\bfshape{10}{900}
1501 \setfont\smallit\itshape{9}{1000}
1502 \setfont\smallsl\slshape{9}{1000}
1503 \setfont\smallsf\sfshape{9}{1000}
1504 \setfont\smallsc\scshape{10}{900}
1505 \setfont\smallttsl\ttslshape{10}{900}
1509 % Fonts for small examples (8pt).
1510 \setfont\smallerrm\rmshape{8}{1000}
1511 \setfont\smallertt\ttshape{8}{1000}
1512 \setfont\smallerbf\bfshape{10}{800}
1513 \setfont\smallerit\itshape{8}{1000}
1514 \setfont\smallersl\slshape{8}{1000}
1515 \setfont\smallersf\sfshape{8}{1000}
1516 \setfont\smallersc\scshape{10}{800}
1517 \setfont\smallerttsl\ttslshape{10}{800}
1518 \font\smalleri=cmmi8
1519 \font\smallersy=cmsy8
1521 % Fonts for title page (20.4pt):
1522 \setfont\titlerm\rmbshape{12}{\magstep3}
1523 \setfont\titleit\itbshape{10}{\magstep4}
1524 \setfont\titlesl\slbshape{10}{\magstep4}
1525 \setfont\titlett\ttbshape{12}{\magstep3}
1526 \setfont\titlettsl\ttslshape{10}{\magstep4}
1527 \setfont\titlesf\sfbshape{17}{\magstep1}
1528 \let\titlebf=\titlerm
1529 \setfont\titlesc\scbshape{10}{\magstep4}
1530 \font\titlei=cmmi12 scaled \magstep3
1531 \font\titlesy=cmsy10 scaled \magstep4
1532 \def\authorrm{\secrm}
1533 \def\authortt{\sectt}
1535 % Chapter (and unnumbered) fonts (17.28pt).
1536 \setfont\chaprm\rmbshape{12}{\magstep2}
1537 \setfont\chapit\itbshape{10}{\magstep3}
1538 \setfont\chapsl\slbshape{10}{\magstep3}
1539 \setfont\chaptt\ttbshape{12}{\magstep2}
1540 \setfont\chapttsl\ttslshape{10}{\magstep3}
1541 \setfont\chapsf\sfbshape{17}{1000}
1543 \setfont\chapsc\scbshape{10}{\magstep3}
1544 \font\chapi=cmmi12 scaled \magstep2
1545 \font\chapsy=cmsy10 scaled \magstep3
1547 % Section fonts (14.4pt).
1548 \setfont\secrm\rmbshape{12}{\magstep1}
1549 \setfont\secit\itbshape{10}{\magstep2}
1550 \setfont\secsl\slbshape{10}{\magstep2}
1551 \setfont\sectt\ttbshape{12}{\magstep1}
1552 \setfont\secttsl\ttslshape{10}{\magstep2}
1553 \setfont\secsf\sfbshape{12}{\magstep1}
1555 \setfont\secsc\scbshape{10}{\magstep2}
1556 \font\seci=cmmi12 scaled \magstep1
1557 \font\secsy=cmsy10 scaled \magstep2
1559 % Subsection fonts (13.15pt).
1560 \setfont\ssecrm\rmbshape{12}{\magstephalf}
1561 \setfont\ssecit\itbshape{10}{1315}
1562 \setfont\ssecsl\slbshape{10}{1315}
1563 \setfont\ssectt\ttbshape{12}{\magstephalf}
1564 \setfont\ssecttsl\ttslshape{10}{1315}
1565 \setfont\ssecsf\sfbshape{12}{\magstephalf}
1567 \setfont\ssecsc\scbshape{10}{1315}
1568 \font\sseci=cmmi12 scaled \magstephalf
1569 \font\ssecsy=cmsy10 scaled 1315
1571 % Reduced fonts for @acro in text (10pt).
1572 \setfont\reducedrm\rmshape{10}{1000}
1573 \setfont\reducedtt\ttshape{10}{1000}
1574 \setfont\reducedbf\bfshape{10}{1000}
1575 \setfont\reducedit\itshape{10}{1000}
1576 \setfont\reducedsl\slshape{10}{1000}
1577 \setfont\reducedsf\sfshape{10}{1000}
1578 \setfont\reducedsc\scshape{10}{1000}
1579 \setfont\reducedttsl\ttslshape{10}{1000}
1580 \font\reducedi=cmmi10
1581 \font\reducedsy=cmsy10
1583 % In order for the font changes to affect most math symbols and letters,
1584 % we have to define the \textfont of the standard families. Since
1585 % texinfo doesn't allow for producing subscripts and superscripts except
1586 % in the main text, we don't bother to reset \scriptfont and
1587 % \scriptscriptfont (which would also require loading a lot more fonts).
1589 \def\resetmathfonts{%
1590 \textfont0=\tenrm \textfont1=\teni \textfont2=\tensy
1591 \textfont\itfam=\tenit \textfont\slfam=\tensl \textfont\bffam=\tenbf
1592 \textfont\ttfam=\tentt \textfont\sffam=\tensf
1595 % The font-changing commands redefine the meanings of \tenSTYLE, instead
1596 % of just \STYLE. We do this because \STYLE needs to also set the
1597 % current \fam for math mode. Our \STYLE (e.g., \rm) commands hardwire
1598 % \tenSTYLE to set the current font.
1600 % Each font-changing command also sets the names \lsize (one size lower)
1601 % and \lllsize (three sizes lower). These relative commands are used in
1602 % the LaTeX logo and acronyms.
1604 % This all needs generalizing, badly.
1607 \let\tenrm=\textrm \let\tenit=\textit \let\tensl=\textsl
1608 \let\tenbf=\textbf \let\tentt=\texttt \let\smallcaps=\textsc
1609 \let\tensf=\textsf \let\teni=\texti \let\tensy=\textsy
1610 \let\tenttsl=\textttsl
1611 \def\lsize{reduced}\def\lllsize{smaller}%
1612 \resetmathfonts \setleading{\textleading}}
1614 \let\tenrm=\titlerm \let\tenit=\titleit \let\tensl=\titlesl
1615 \let\tenbf=\titlebf \let\tentt=\titlett \let\smallcaps=\titlesc
1616 \let\tensf=\titlesf \let\teni=\titlei \let\tensy=\titlesy
1617 \let\tenttsl=\titlettsl
1618 \def\lsize{chap}\def\lllsize{subsec}%
1619 \resetmathfonts \setleading{25pt}}
1620 \def\titlefont#1{{\titlefonts\rm #1}}
1622 \let\tenrm=\chaprm \let\tenit=\chapit \let\tensl=\chapsl
1623 \let\tenbf=\chapbf \let\tentt=\chaptt \let\smallcaps=\chapsc
1624 \let\tensf=\chapsf \let\teni=\chapi \let\tensy=\chapsy \let\tenttsl=\chapttsl
1625 \def\lsize{sec}\def\lllsize{text}%
1626 \resetmathfonts \setleading{19pt}}
1628 \let\tenrm=\secrm \let\tenit=\secit \let\tensl=\secsl
1629 \let\tenbf=\secbf \let\tentt=\sectt \let\smallcaps=\secsc
1630 \let\tensf=\secsf \let\teni=\seci \let\tensy=\secsy
1631 \let\tenttsl=\secttsl
1632 \def\lsize{subsec}\def\lllsize{reduced}%
1633 \resetmathfonts \setleading{16pt}}
1635 \let\tenrm=\ssecrm \let\tenit=\ssecit \let\tensl=\ssecsl
1636 \let\tenbf=\ssecbf \let\tentt=\ssectt \let\smallcaps=\ssecsc
1637 \let\tensf=\ssecsf \let\teni=\sseci \let\tensy=\ssecsy
1638 \let\tenttsl=\ssecttsl
1639 \def\lsize{text}\def\lllsize{small}%
1640 \resetmathfonts \setleading{15pt}}
1641 \let\subsubsecfonts = \subsecfonts
1643 \let\tenrm=\reducedrm \let\tenit=\reducedit \let\tensl=\reducedsl
1644 \let\tenbf=\reducedbf \let\tentt=\reducedtt \let\reducedcaps=\reducedsc
1645 \let\tensf=\reducedsf \let\teni=\reducedi \let\tensy=\reducedsy
1646 \let\tenttsl=\reducedttsl
1647 \def\lsize{small}\def\lllsize{smaller}%
1648 \resetmathfonts \setleading{10.5pt}}
1650 \let\tenrm=\smallrm \let\tenit=\smallit \let\tensl=\smallsl
1651 \let\tenbf=\smallbf \let\tentt=\smalltt \let\smallcaps=\smallsc
1652 \let\tensf=\smallsf \let\teni=\smalli \let\tensy=\smallsy
1653 \let\tenttsl=\smallttsl
1654 \def\lsize{smaller}\def\lllsize{smaller}%
1655 \resetmathfonts \setleading{10.5pt}}
1657 \let\tenrm=\smallerrm \let\tenit=\smallerit \let\tensl=\smallersl
1658 \let\tenbf=\smallerbf \let\tentt=\smallertt \let\smallcaps=\smallersc
1659 \let\tensf=\smallersf \let\teni=\smalleri \let\tensy=\smallersy
1660 \let\tenttsl=\smallerttsl
1661 \def\lsize{smaller}\def\lllsize{smaller}%
1662 \resetmathfonts \setleading{9.5pt}}
1664 % Set the fonts to use with the @small... environments.
1665 \let\smallexamplefonts = \smallfonts
1667 % About \smallexamplefonts. If we use \smallfonts (9pt), @smallexample
1668 % can fit this many characters:
1669 % 8.5x11=86 smallbook=72 a4=90 a5=69
1670 % If we use \scriptfonts (8pt), then we can fit this many characters:
1671 % 8.5x11=90+ smallbook=80 a4=90+ a5=77
1672 % For me, subjectively, the few extra characters that fit aren't worth
1673 % the additional smallness of 8pt. So I'm making the default 9pt.
1675 % By the way, for comparison, here's what fits with @example (10pt):
1676 % 8.5x11=71 smallbook=60 a4=75 a5=58
1678 % I wish the USA used A4 paper.
1682 % Set up the default fonts, so we can use them for creating boxes.
1686 % Define these so they can be easily changed for other fonts.
1687 \def\angleleft{$\langle$}
1688 \def\angleright{$\rangle$}
1690 % Count depth in font-changes, for error checks
1691 \newcount\fontdepth \fontdepth=0
1693 % Fonts for short table of contents.
1694 \setfont\shortcontrm\rmshape{12}{1000}
1695 \setfont\shortcontbf\bfshape{10}{\magstep1} % no cmb12
1696 \setfont\shortcontsl\slshape{12}{1000}
1697 \setfont\shortconttt\ttshape{12}{1000}
1699 %% Add scribe-like font environments, plus @l for inline lisp (usually sans
1700 %% serif) and @ii for TeX italic
1702 % \smartitalic{ARG} outputs arg in italics, followed by an italic correction
1703 % unless the following character is such as not to need one.
1704 \def\smartitalicx{\ifx\next,\else\ifx\next-\else\ifx\next.\else
1705 \ptexslash\fi\fi\fi}
1706 \def\smartslanted#1{{\ifusingtt\ttsl\sl #1}\futurelet\next\smartitalicx}
1707 \def\smartitalic#1{{\ifusingtt\ttsl\it #1}\futurelet\next\smartitalicx}
1709 % like \smartslanted except unconditionally uses \ttsl.
1710 % @var is set to this for defun arguments.
1711 \def\ttslanted#1{{\ttsl #1}\futurelet\next\smartitalicx}
1713 % like \smartslanted except unconditionally use \sl. We never want
1714 % ttsl for book titles, do we?
1715 \def\cite#1{{\sl #1}\futurelet\next\smartitalicx}
1718 \let\var=\smartslanted
1719 \let\dfn=\smartslanted
1720 \let\emph=\smartitalic
1725 % We can't just use \exhyphenpenalty, because that only has effect at
1726 % the end of a paragraph. Restore normal hyphenation at the end of the
1727 % group within which \nohyphenation is presumably called.
1729 \def\nohyphenation{\hyphenchar\font = -1 \aftergroup\restorehyphenation}
1730 \def\restorehyphenation{\hyphenchar\font = `- }
1732 % Set sfcode to normal for the chars that usually have another value.
1733 % Can't use plain's \frenchspacing because it uses the `\x notation, and
1734 % sometimes \x has an active definition that messes things up.
1737 \def\frenchspacing{%
1738 \sfcode\dotChar =\@m \sfcode\questChar=\@m \sfcode\exclamChar=\@m
1739 \sfcode\colonChar=\@m \sfcode\semiChar =\@m \sfcode\commaChar =\@m
1744 {\tt \rawbackslash \frenchspacing #1}%
1747 \def\samp#1{`\tclose{#1}'\null}
1748 \setfont\keyrm\rmshape{8}{1000}
1750 \def\key#1{{\keyrm\textfont2=\keysy \leavevmode\hbox{%
1751 \raise0.4pt\hbox{\angleleft}\kern-.08em\vtop{%
1752 \vbox{\hrule\kern-0.4pt
1753 \hbox{\raise0.4pt\hbox{\vphantom{\angleleft}}#1}}%
1755 \kern-.06em\raise0.4pt\hbox{\angleright}}}}
1756 % The old definition, with no lozenge:
1757 %\def\key #1{{\ttsl \nohyphenation \uppercase{#1}}\null}
1758 \def\ctrl #1{{\tt \rawbackslash \hat}#1}
1760 % @file, @option are the same as @samp.
1764 % @code is a modification of @t,
1765 % which makes spaces the same size as normal in the surrounding text.
1768 % Change normal interword space to be same as for the current font.
1769 \spaceskip = \fontdimen2\font
1771 % Switch to typewriter.
1774 % But `\ ' produces the large typewriter interword space.
1775 \def\ {{\spaceskip = 0pt{} }}%
1777 % Turn off hyphenation.
1787 % We *must* turn on hyphenation at `-' and `_' in @code.
1788 % Otherwise, it is too hard to avoid overfull hboxes
1789 % in the Emacs manual, the Library manual, etc.
1791 % Unfortunately, TeX uses one parameter (\hyphenchar) to control
1792 % both hyphenation at - and hyphenation within words.
1793 % We must therefore turn them both off (\tclose does that)
1794 % and arrange explicitly to hyphenate at a dash.
1800 \global\def\code{\begingroup
1801 \catcode`\-=\active \let-\codedash
1802 \catcode`\_=\active \let_\codeunder
1808 \def\codedash{-\discretionary{}{}{}}
1810 % this is all so @math{@code{var_name}+1} can work. In math mode, _
1811 % is "active" (mathcode"8000) and \normalunderscore (or \char95, etc.)
1812 % will therefore expand the active definition of _, which is us
1813 % (inside @code that is), therefore an endless loop.
1815 \mathchar"075F % class 0=ordinary, family 7=ttfam, pos 0x5F=_.
1816 \else\normalunderscore \fi
1817 \discretionary{}{}{}}%
1820 \def\codex #1{\tclose{#1}\endgroup}
1822 % @kbd is like @code, except that if the argument is just one @key command,
1823 % then @kbd has no effect.
1825 % @kbdinputstyle -- arg is `distinct' (@kbd uses slanted tty font always),
1826 % `example' (@kbd uses ttsl only inside of @example and friends),
1827 % or `code' (@kbd uses normal tty font always).
1828 \parseargdef\kbdinputstyle{%
1830 \ifx\arg\worddistinct
1831 \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\ttsl}%
1832 \else\ifx\arg\wordexample
1833 \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\tt}%
1834 \else\ifx\arg\wordcode
1835 \gdef\kbdexamplefont{\tt}\gdef\kbdfont{\tt}%
1837 \errhelp = \EMsimple
1838 \errmessage{Unknown @kbdinputstyle option `\arg'}%
1841 \def\worddistinct{distinct}
1842 \def\wordexample{example}
1845 % Default is `distinct.'
1846 \kbdinputstyle distinct
1849 \def\kbdfoo#1#2#3\par{\def\one{#1}\def\three{#3}\def\threex{??}%
1850 \ifx\one\xkey\ifx\threex\three \key{#2}%
1851 \else{\tclose{\kbdfont\look}}\fi
1852 \else{\tclose{\kbdfont\look}}\fi}
1854 % For @url, @env, @command quotes seem unnecessary, so use \code.
1859 % @uref (abbreviation for `urlref') takes an optional (comma-separated)
1860 % second argument specifying the text to display and an optional third
1861 % arg as text to display instead of (rather than in addition to) the url
1862 % itself. First (mandatory) arg is the url. Perhaps eventually put in
1863 % a hypertex \special here.
1865 \def\uref#1{\douref #1,,,\finish}
1866 \def\douref#1,#2,#3,#4\finish{\begingroup
1869 \setbox0 = \hbox{\ignorespaces #3}%
1871 \unhbox0 % third arg given, show only that
1873 \setbox0 = \hbox{\ignorespaces #2}%
1876 \unhbox0 % PDF: 2nd arg given, show only it
1878 \unhbox0\ (\code{#1})% DVI: 2nd arg given, show both it and url
1881 \code{#1}% only url given, so show it
1887 % rms does not like angle brackets --karl, 17may97.
1888 % So now @email is just like @uref, unless we are pdf.
1890 %\def\email#1{\angleleft{\tt #1}\angleright}
1892 \def\email#1{\doemail#1,,\finish}
1893 \def\doemail#1,#2,#3\finish{\begingroup
1896 \setbox0 = \hbox{\ignorespaces #2}%
1897 \ifdim\wd0>0pt\unhbox0\else\code{#1}\fi
1904 % Check if we are currently using a typewriter font. Since all the
1905 % Computer Modern typewriter fonts have zero interword stretch (and
1906 % shrink), and it is reasonable to expect all typewriter fonts to have
1907 % this property, we can check that font parameter.
1909 \def\ifmonospace{\ifdim\fontdimen3\font=0pt }
1911 % Typeset a dimension, e.g., `in' or `pt'. The only reason for the
1912 % argument is to make the input look right: @dmn{pt} instead of @dmn{}pt.
1914 \def\dmn#1{\thinspace #1}
1916 \def\kbd#1{\def\look{#1}\expandafter\kbdfoo\look??\par}
1918 % @l was never documented to mean ``switch to the Lisp font'',
1919 % and it is not used as such in any manual I can find. We need it for
1920 % Polish suppressed-l. --karl, 22sep96.
1921 %\def\l#1{{\li #1}\null}
1923 % Explicit font changes: @r, @sc, undocumented @ii.
1924 \def\r#1{{\rm #1}} % roman font
1925 \def\sc#1{{\smallcaps#1}} % smallcaps font
1926 \def\ii#1{{\it #1}} % italic font
1928 \def\acronym#1{\doacronym #1,,\finish}
1929 \def\doacronym#1,#2,#3\finish{%
1930 {\selectfonts\lsize #1}%
1932 \ifx\temp\empty \else
1933 \space ({\unsepspaces \ignorespaces \temp \unskip})%
1937 % @pounds{} is a sterling sign, which is in the CM italic font.
1939 \def\pounds{{\it\$}}
1941 % @registeredsymbol - R in a circle. The font for the R should really
1942 % be smaller yet, but lllsize is the best we can do for now.
1943 % Adapted from the plain.tex definition of \copyright.
1945 \def\registeredsymbol{%
1946 $^{{\ooalign{\hfil\raise.07ex\hbox{\selectfonts\lllsize R}%
1952 \message{page headings,}
1954 \newskip\titlepagetopglue \titlepagetopglue = 1.5in
1955 \newskip\titlepagebottomglue \titlepagebottomglue = 2pc
1957 % First the title page. Must do @settitle before @titlepage.
1959 \newif\iffinishedtitlepage
1961 % Do an implicit @contents or @shortcontents after @end titlepage if the
1962 % user says @setcontentsaftertitlepage or @setshortcontentsaftertitlepage.
1964 \newif\ifsetcontentsaftertitlepage
1965 \let\setcontentsaftertitlepage = \setcontentsaftertitlepagetrue
1966 \newif\ifsetshortcontentsaftertitlepage
1967 \let\setshortcontentsaftertitlepage = \setshortcontentsaftertitlepagetrue
1969 \parseargdef\shorttitlepage{\begingroup\hbox{}\vskip 1.5in \chaprm \centerline{#1}%
1970 \endgroup\page\hbox{}\page}
1973 % Open one extra group, as we want to close it in the middle of \Etitlepage.
1975 \parindent=0pt \textfonts
1976 % Leave some space at the very top of the page.
1977 \vglue\titlepagetopglue
1978 % No rule at page bottom unless we print one at the top with @title.
1979 \finishedtitlepagetrue
1981 % Most title ``pages'' are actually two pages long, with space
1982 % at the top of the second. We don't want the ragged left on the second.
1983 \let\oldpage = \page
1985 \iffinishedtitlepage\else
1988 \let\page = \oldpage
1995 \iffinishedtitlepage\else
1998 % It is important to do the page break before ending the group,
1999 % because the headline and footline are only empty inside the group.
2000 % If we use the new definition of \page, we always get a blank page
2001 % after the title page, which we certainly don't want.
2005 % Need this before the \...aftertitlepage checks so that if they are
2006 % in effect the toc pages will come out with page numbers.
2009 % If they want short, they certainly want long too.
2010 \ifsetshortcontentsaftertitlepage
2013 \global\let\shortcontents = \relax
2014 \global\let\contents = \relax
2017 \ifsetcontentsaftertitlepage
2019 \global\let\contents = \relax
2020 \global\let\shortcontents = \relax
2024 \def\finishtitlepage{%
2025 \vskip4pt \hrule height 2pt width \hsize
2026 \vskip\titlepagebottomglue
2027 \finishedtitlepagetrue
2030 %%% Macros to be used within @titlepage:
2032 \let\subtitlerm=\tenrm
2033 \def\subtitlefont{\subtitlerm \normalbaselineskip = 13pt \normalbaselines}
2035 \def\authorfont{\authorrm \normalbaselineskip = 16pt \normalbaselines
2038 \parseargdef\title{%
2040 \leftline{\titlefonts\rm #1}
2041 % print a rule at the page bottom also.
2042 \finishedtitlepagefalse
2043 \vskip4pt \hrule height 4pt width \hsize \vskip4pt
2046 \parseargdef\subtitle{%
2048 {\subtitlefont \rightline{#1}}%
2051 % @author should come last, but may come many times.
2052 % It can also be used inside @quotation.
2054 \parseargdef\author{%
2055 \def\temp{\quotation}%
2057 \def\quotationauthor{#1}% printed in \Equotation.
2060 \ifseenauthor\else \vskip 0pt plus 1filll \seenauthortrue \fi
2061 {\authorfont \leftline{#1}}%
2066 %%% Set up page headings and footings.
2068 \let\thispage=\folio
2070 \newtoks\evenheadline % headline on even pages
2071 \newtoks\oddheadline % headline on odd pages
2072 \newtoks\evenfootline % footline on even pages
2073 \newtoks\oddfootline % footline on odd pages
2075 % Now make TeX use those variables
2076 \headline={{\textfonts\rm \ifodd\pageno \the\oddheadline
2077 \else \the\evenheadline \fi}}
2078 \footline={{\textfonts\rm \ifodd\pageno \the\oddfootline
2079 \else \the\evenfootline \fi}\HEADINGShook}
2080 \let\HEADINGShook=\relax
2082 % Commands to set those variables.
2083 % For example, this is what @headings on does
2084 % @evenheading @thistitle|@thispage|@thischapter
2085 % @oddheading @thischapter|@thispage|@thistitle
2086 % @evenfooting @thisfile||
2087 % @oddfooting ||@thisfile
2090 \def\evenheading{\parsearg\evenheadingxxx}
2091 \def\evenheadingxxx #1{\evenheadingyyy #1\|\|\|\|\finish}
2092 \def\evenheadingyyy #1\|#2\|#3\|#4\finish{%
2093 \global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
2095 \def\oddheading{\parsearg\oddheadingxxx}
2096 \def\oddheadingxxx #1{\oddheadingyyy #1\|\|\|\|\finish}
2097 \def\oddheadingyyy #1\|#2\|#3\|#4\finish{%
2098 \global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
2100 \parseargdef\everyheading{\oddheadingxxx{#1}\evenheadingxxx{#1}}%
2102 \def\evenfooting{\parsearg\evenfootingxxx}
2103 \def\evenfootingxxx #1{\evenfootingyyy #1\|\|\|\|\finish}
2104 \def\evenfootingyyy #1\|#2\|#3\|#4\finish{%
2105 \global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
2107 \def\oddfooting{\parsearg\oddfootingxxx}
2108 \def\oddfootingxxx #1{\oddfootingyyy #1\|\|\|\|\finish}
2109 \def\oddfootingyyy #1\|#2\|#3\|#4\finish{%
2110 \global\oddfootline = {\rlap{\centerline{#2}}\line{#1\hfil#3}}%
2112 % Leave some space for the footline. Hopefully ok to assume
2113 % @evenfooting will not be used by itself.
2114 \global\advance\pageheight by -\baselineskip
2115 \global\advance\vsize by -\baselineskip
2118 \parseargdef\everyfooting{\oddfootingxxx{#1}\evenfootingxxx{#1}}
2121 % @headings double turns headings on for double-sided printing.
2122 % @headings single turns headings on for single-sided printing.
2123 % @headings off turns them off.
2124 % @headings on same as @headings double, retained for compatibility.
2125 % @headings after turns on double-sided headings after this page.
2126 % @headings doubleafter turns on double-sided headings after this page.
2127 % @headings singleafter turns on single-sided headings after this page.
2128 % By default, they are off at the start of a document,
2129 % and turned `on' after @end titlepage.
2131 \def\headings #1 {\csname HEADINGS#1\endcsname}
2134 \global\evenheadline={\hfil} \global\evenfootline={\hfil}
2135 \global\oddheadline={\hfil} \global\oddfootline={\hfil}}
2137 % When we turn headings on, set the page number to 1.
2138 % For double-sided printing, put current file name in lower left corner,
2139 % chapter name on inside top of right hand pages, document
2140 % title on inside top of left hand pages, and page numbers on outside top
2141 % edge of all pages.
2142 \def\HEADINGSdouble{%
2144 \global\evenfootline={\hfil}
2145 \global\oddfootline={\hfil}
2146 \global\evenheadline={\line{\folio\hfil\thistitle}}
2147 \global\oddheadline={\line{\thischapter\hfil\folio}}
2148 \global\let\contentsalignmacro = \chapoddpage
2150 \let\contentsalignmacro = \chappager
2152 % For single-sided printing, chapter title goes across top left of page,
2153 % page number on top right.
2154 \def\HEADINGSsingle{%
2156 \global\evenfootline={\hfil}
2157 \global\oddfootline={\hfil}
2158 \global\evenheadline={\line{\thischapter\hfil\folio}}
2159 \global\oddheadline={\line{\thischapter\hfil\folio}}
2160 \global\let\contentsalignmacro = \chappager
2162 \def\HEADINGSon{\HEADINGSdouble}
2164 \def\HEADINGSafter{\let\HEADINGShook=\HEADINGSdoublex}
2165 \let\HEADINGSdoubleafter=\HEADINGSafter
2166 \def\HEADINGSdoublex{%
2167 \global\evenfootline={\hfil}
2168 \global\oddfootline={\hfil}
2169 \global\evenheadline={\line{\folio\hfil\thistitle}}
2170 \global\oddheadline={\line{\thischapter\hfil\folio}}
2171 \global\let\contentsalignmacro = \chapoddpage
2174 \def\HEADINGSsingleafter{\let\HEADINGShook=\HEADINGSsinglex}
2175 \def\HEADINGSsinglex{%
2176 \global\evenfootline={\hfil}
2177 \global\oddfootline={\hfil}
2178 \global\evenheadline={\line{\thischapter\hfil\folio}}
2179 \global\oddheadline={\line{\thischapter\hfil\folio}}
2180 \global\let\contentsalignmacro = \chappager
2183 % Subroutines used in generating headings
2184 % This produces Day Month Year style of output.
2185 % Only define if not already defined, in case a txi-??.tex file has set
2186 % up a different format (e.g., txi-cs.tex does this).
2187 \ifx\today\undefined
2191 \or\putwordMJan\or\putwordMFeb\or\putwordMMar\or\putwordMApr
2192 \or\putwordMMay\or\putwordMJun\or\putwordMJul\or\putwordMAug
2193 \or\putwordMSep\or\putwordMOct\or\putwordMNov\or\putwordMDec
2198 % @settitle line... specifies the title of the document, for headings.
2199 % It generates no output of its own.
2200 \def\thistitle{\putwordNoTitle}
2201 \def\settitle{\parsearg{\gdef\thistitle}}
2205 % Tables -- @table, @ftable, @vtable, @item(x).
2207 % default indentation of table text
2208 \newdimen\tableindent \tableindent=.8in
2209 % default indentation of @itemize and @enumerate text
2210 \newdimen\itemindent \itemindent=.3in
2211 % margin between end of table item and start of table text.
2212 \newdimen\itemmargin \itemmargin=.1in
2214 % used internally for \itemindent minus \itemmargin
2217 % Note @table, @ftable, and @vtable define @item, @itemx, etc., with
2219 % They also define \itemindex
2220 % to index the item name in whatever manner is desired (perhaps none).
2222 \newif\ifitemxneedsnegativevskip
2224 \def\itemxpar{\par\ifitemxneedsnegativevskip\nobreak\vskip-\parskip\nobreak\fi}
2226 \def\internalBitem{\smallbreak \parsearg\itemzzz}
2227 \def\internalBitemx{\itemxpar \parsearg\itemzzz}
2229 \def\itemzzz #1{\begingroup %
2230 \advance\hsize by -\rightskip
2231 \advance\hsize by -\tableindent
2232 \setbox0=\hbox{\itemindicate{#1}}%
2234 \nobreak % This prevents a break before @itemx.
2236 % If the item text does not fit in the space we have, put it on a line
2237 % by itself, and do not allow a page break either before or after that
2238 % line. We do not start a paragraph here because then if the next
2239 % command is, e.g., @kindex, the whatsit would get put into the
2240 % horizontal list on a line by itself, resulting in extra blank space.
2241 \ifdim \wd0>\itemmax
2243 % Make this a paragraph so we get the \parskip glue and wrapping,
2244 % but leave it ragged-right.
2246 \advance\leftskip by-\tableindent
2247 \advance\hsize by\tableindent
2248 \advance\rightskip by0pt plus1fil
2249 \leavevmode\unhbox0\par
2252 % We're going to be starting a paragraph, but we don't want the
2253 % \parskip glue -- logically it's part of the @item we just started.
2254 \nobreak \vskip-\parskip
2256 % Stop a page break at the \parskip glue coming up. (Unfortunately
2257 % we can't prevent a possible page break at the following
2258 % \baselineskip glue.) However, if what follows is an environment
2259 % such as @example, there will be no \parskip glue; then
2260 % the negative vskip we just would cause the example and the item to
2261 % crash together. So we use this bizarre value of 10001 as a signal
2262 % to \aboveenvbreak to insert \parskip glue after all.
2263 % (Possibly there are other commands that could be followed by
2264 % @example which need the same treatment, but not section titles; or
2265 % maybe section titles are the only special case and they should be
2269 \itemxneedsnegativevskipfalse
2271 % The item text fits into the space. Start a paragraph, so that the
2272 % following text (if any) will end up on the same line.
2274 % Do this with kerns and \unhbox so that if there is a footnote in
2275 % the item text, it can migrate to the main vertical list and
2276 % eventually be printed.
2277 \nobreak\kern-\tableindent
2278 \dimen0 = \itemmax \advance\dimen0 by \itemmargin \advance\dimen0 by -\wd0
2280 \nobreak\kern\dimen0
2282 \itemxneedsnegativevskiptrue
2286 \def\item{\errmessage{@item while not in a list environment}}
2287 \def\itemx{\errmessage{@itemx while not in a list environment}}
2289 % @table, @ftable, @vtable.
2291 \let\itemindex\gobble
2295 \def\itemindex ##1{\doind {fn}{\code{##1}}}%
2299 \def\itemindex ##1{\doind {vr}{\code{##1}}}%
2303 \def\itemindicate{#1}%
2308 \makevalueexpandable
2309 \edef\temp{\noexpand\tablez #1\space\space\space}%
2313 \def\tablez #1 #2 #3 #4\endtablez{%
2315 \ifnum 0#1>0 \advance \leftskip by #1\mil \fi
2316 \ifnum 0#2>0 \tableindent=#2\mil \fi
2317 \ifnum 0#3>0 \advance \rightskip by #3\mil \fi
2318 \itemmax=\tableindent
2319 \advance \itemmax by -\itemmargin
2320 \advance \leftskip by \tableindent
2321 \exdentamount=\tableindent
2323 \parskip = \smallskipamount
2324 \ifdim \parskip=0pt \parskip=2pt \fi
2325 \let\item = \internalBitem
2326 \let\itemx = \internalBitemx
2328 \def\Etable{\endgraf\afterenvbreak}
2331 \let\Eitemize\Etable
2332 \let\Eenumerate\Etable
2334 % This is the counter used by @enumerate, which is really @itemize
2338 \envdef\itemize{\parsearg\doitemize}
2342 \itemmax=\itemindent
2343 \advance\itemmax by -\itemmargin
2344 \advance\leftskip by \itemindent
2345 \exdentamount=\itemindent
2347 \parskip=\smallskipamount
2348 \ifdim\parskip=0pt \parskip=2pt \fi
2349 \def\itemcontents{#1}%
2350 % @itemize with no arg is equivalent to @itemize @bullet.
2351 \ifx\itemcontents\empty\def\itemcontents{\bullet}\fi
2352 \let\item=\itemizeitem
2355 % Definition of @item while inside @itemize and @enumerate.
2358 \advance\itemno by 1 % for enumerations
2359 {\let\par=\endgraf \smallbreak}% reasonable place to break
2361 % If the document has an @itemize directly after a section title, a
2362 % \nobreak will be last on the list, and \sectionheading will have
2363 % done a \vskip-\parskip. In that case, we don't want to zero
2364 % parskip, or the item text will crash with the heading. On the
2365 % other hand, when there is normal text preceding the item (as there
2366 % usually is), we do want to zero parskip, or there would be too much
2367 % space. In that case, we won't have a \nobreak before. At least
2368 % that's the theory.
2369 \ifnum\lastpenalty<10000 \parskip=0in \fi
2371 \hbox to 0pt{\hss \itemcontents \kern\itemmargin}%
2372 \vadjust{\penalty 1200}}% not good to break after first line of item.
2376 % \splitoff TOKENS\endmark defines \first to be the first token in
2377 % TOKENS, and \rest to be the remainder.
2379 \def\splitoff#1#2\endmark{\def\first{#1}\def\rest{#2}}%
2381 % Allow an optional argument of an uppercase letter, lowercase letter,
2382 % or number, to specify the first label in the enumerated list. No
2383 % argument is the same as `1'.
2385 \envparseargdef\enumerate{\enumeratey #1 \endenumeratey}
2386 \def\enumeratey #1 #2\endenumeratey{%
2387 % If we were given no argument, pretend we were given `1'.
2389 \ifx\thearg\empty \def\thearg{1}\fi
2391 % Detect if the argument is a single token. If so, it might be a
2392 % letter. Otherwise, the only valid thing it can be is a number.
2393 % (We will always have one token, because of the test we just made.
2394 % This is a good thing, since \splitoff doesn't work given nothing at
2395 % all -- the first parameter is undelimited.)
2396 \expandafter\splitoff\thearg\endmark
2398 % Only one token in the argument. It could still be anything.
2399 % A ``lowercase letter'' is one whose \lccode is nonzero.
2400 % An ``uppercase letter'' is one whose \lccode is both nonzero, and
2401 % not equal to itself.
2402 % Otherwise, we assume it's a number.
2404 % We need the \relax at the end of the \ifnum lines to stop TeX from
2405 % continuing to look for a <number>.
2407 \ifnum\lccode\expandafter`\thearg=0\relax
2408 \numericenumerate % a number (we hope)
2411 \ifnum\lccode\expandafter`\thearg=\expandafter`\thearg\relax
2412 \lowercaseenumerate % lowercase letter
2414 \uppercaseenumerate % uppercase letter
2418 % Multiple tokens in the argument. We hope it's a number.
2423 % An @enumerate whose labels are integers. The starting integer is
2426 \def\numericenumerate{%
2428 \startenumeration{\the\itemno}%
2431 % The starting (lowercase) letter is in \thearg.
2432 \def\lowercaseenumerate{%
2433 \itemno = \expandafter`\thearg
2435 % Be sure we're not beyond the end of the alphabet.
2437 \errmessage{No more lowercase letters in @enumerate; get a bigger
2444 % The starting (uppercase) letter is in \thearg.
2445 \def\uppercaseenumerate{%
2446 \itemno = \expandafter`\thearg
2448 % Be sure we're not beyond the end of the alphabet.
2450 \errmessage{No more uppercase letters in @enumerate; get a bigger
2457 % Call \doitemize, adding a period to the first argument and supplying the
2458 % common last two arguments. Also subtract one from the initial value in
2459 % \itemno, since @item increments \itemno.
2461 \def\startenumeration#1{%
2462 \advance\itemno by -1
2463 \doitemize{#1.}\flushcr
2466 % @alphaenumerate and @capsenumerate are abbreviations for giving an arg
2469 \def\alphaenumerate{\enumerate{a}}
2470 \def\capsenumerate{\enumerate{A}}
2471 \def\Ealphaenumerate{\Eenumerate}
2472 \def\Ecapsenumerate{\Eenumerate}
2475 % @multitable macros
2476 % Amy Hendrickson, 8/18/94, 3/6/96
2478 % @multitable ... @end multitable will make as many columns as desired.
2479 % Contents of each column will wrap at width given in preamble. Width
2480 % can be specified either with sample text given in a template line,
2481 % or in percent of \hsize, the current width of text on page.
2483 % Table can continue over pages but will only break between lines.
2487 % Either define widths of columns in terms of percent of \hsize:
2488 % @multitable @columnfractions .25 .3 .45
2491 % Numbers following @columnfractions are the percent of the total
2492 % current hsize to be used for each column. You may use as many
2493 % columns as desired.
2496 % Or use a template:
2497 % @multitable {Column 1 template} {Column 2 template} {Column 3 template}
2499 % using the widest term desired in each column.
2501 % Each new table line starts with @item, each subsequent new column
2502 % starts with @tab. Empty columns may be produced by supplying @tab's
2503 % with nothing between them for as many times as empty columns are needed,
2504 % ie, @tab@tab@tab will produce two empty columns.
2506 % @item, @tab do not need to be on their own lines, but it will not hurt
2509 % Sample multitable:
2511 % @multitable {Column 1 template} {Column 2 template} {Column 3 template}
2512 % @item first col stuff @tab second col stuff @tab third col
2519 % @item first col stuff @tab second col stuff
2520 % @tab Many paragraphs of text may be used in any column.
2522 % They will wrap at the width determined by the template.
2523 % @item@tab@tab This will be in third column.
2526 % Default dimensions may be reset by user.
2527 % @multitableparskip is vertical space between paragraphs in table.
2528 % @multitableparindent is paragraph indent in table.
2529 % @multitablecolmargin is horizontal space to be left between columns.
2530 % @multitablelinespace is space to leave between table items, baseline
2532 % 0pt means it depends on current normal line spacing.
2534 \newskip\multitableparskip
2535 \newskip\multitableparindent
2536 \newdimen\multitablecolspace
2537 \newskip\multitablelinespace
2538 \multitableparskip=0pt
2539 \multitableparindent=6pt
2540 \multitablecolspace=12pt
2541 \multitablelinespace=0pt
2543 % Macros used to set up halign preamble:
2545 \let\endsetuptable\relax
2546 \def\xendsetuptable{\endsetuptable}
2547 \let\columnfractions\relax
2548 \def\xcolumnfractions{\columnfractions}
2551 % #1 is the @columnfraction, usually a decimal number like .5, but might
2552 % be just 1. We just use it, whatever it is.
2554 \def\pickupwholefraction#1 {%
2555 \global\advance\colcount by 1
2556 \expandafter\xdef\csname col\the\colcount\endcsname{#1\hsize}%
2563 \ifx\firstarg\xendsetuptable
2566 \ifx\firstarg\xcolumnfractions
2567 \global\setpercenttrue
2570 \let\go\pickupwholefraction
2572 \global\advance\colcount by 1
2573 \setbox0=\hbox{#1\unskip\space}% Add a normal word space as a
2574 % separator; typically that is always in the input, anyway.
2575 \expandafter\xdef\csname col\the\colcount\endcsname{\the\wd0}%
2578 \ifx\go\pickupwholefraction
2579 % Put the argument back for the \pickupwholefraction call, so
2580 % we'll always have a period there to be parsed.
2581 \def\go{\pickupwholefraction#1}%
2583 \let\go = \setuptable
2589 % multitable-only commands.
2591 % @headitem starts a heading row, which we typeset in bold.
2592 % Assignments have to be global since we are inside the implicit group
2593 % of an alignment entry. Note that \everycr resets \everytab.
2594 \def\headitem{\checkenv\multitable \crcr \global\everytab={\bf}\the\everytab}%
2596 % A \tab used to include \hskip1sp. But then the space in a template
2597 % line is not enough. That is bad. So let's go back to just `&' until
2598 % we encounter the problem it was intended to solve again.
2599 % --karl, nathan@acm.org, 20apr99.
2600 \def\tab{\checkenv\multitable &\the\everytab}%
2602 % @multitable ... @end multitable definitions:
2604 \newtoks\everytab % insert after every tab.
2606 \envdef\multitable{%
2610 % @item within a multitable starts a normal row.
2615 \setmultitablespacing
2616 \parskip=\multitableparskip
2617 \parindent=\multitableparindent
2623 \global\everytab={}%
2624 \global\colcount=0 % Reset the column counter.
2625 % Check for saved footnotes, etc.
2627 % Keeps underfull box messages off when table breaks over pages.
2629 % Maybe so, but it also creates really weird page breaks when the
2630 % table breaks over pages. Wouldn't \vfil be better? Wait until the
2631 % problem manifests itself, so it can be fixed for real --karl.
2635 \parsearg\domultitable
2637 \def\domultitable#1{%
2638 % To parse everything between @multitable and @item:
2639 \setuptable#1 \endsetuptable
2641 % This preamble sets up a generic column definition, which will
2642 % be used as many times as user calls for columns.
2643 % \vtop will set a single line and will also let text wrap and
2644 % continue for many paragraphs if desired.
2646 \global\advance\colcount by 1
2649 % Use the current \colcount to find the correct column width:
2650 \hsize=\expandafter\csname col\the\colcount\endcsname
2652 % In order to keep entries from bumping into each other
2653 % we will add a \leftskip of \multitablecolspace to all columns after
2656 % If a template has been used, we will add \multitablecolspace
2657 % to the width of each template entry.
2659 % If the user has set preamble in terms of percent of \hsize we will
2660 % use that dimension as the width of the column, and the \leftskip
2661 % will keep entries from bumping into each other. Table will start at
2662 % left margin and final column will justify at right margin.
2664 % Make sure we don't inherit \rightskip from the outer environment.
2667 % The first column will be indented with the surrounding text.
2668 \advance\hsize by\leftskip
2671 % If user has not set preamble in terms of percent of \hsize
2672 % we will advance \hsize by \multitablecolspace.
2673 \advance\hsize by \multitablecolspace
2675 % In either case we will make \leftskip=\multitablecolspace:
2676 \leftskip=\multitablecolspace
2678 % Ignoring space at the beginning and end avoids an occasional spurious
2679 % blank line, when TeX decides to break the line at the space before the
2680 % box from the multistrut, so the strut ends up on a line by itself.
2682 % @multitable @columnfractions .11 .89
2684 % @tab Legal holiday which is valid in major parts of the whole country.
2685 % Is automatically provided with highlighting sequences respectively
2686 % marking characters.
2687 \noindent\ignorespaces##\unskip\multistrut
2692 \egroup % end the \halign
2693 \global\setpercentfalse
2696 \def\setmultitablespacing{% test to see if user has set \multitablelinespace.
2697 % If so, do nothing. If not, give it an appropriate dimension based on
2698 % current baselineskip.
2699 \ifdim\multitablelinespace=0pt
2700 \setbox0=\vbox{X}\global\multitablelinespace=\the\baselineskip
2701 \global\advance\multitablelinespace by-\ht0
2702 %% strut to put in table in case some entry doesn't have descenders,
2703 %% to keep lines equally spaced
2704 \let\multistrut = \strut
2706 %% FIXME: what is \box0 supposed to be?
2707 \gdef\multistrut{\vrule height\multitablelinespace depth\dp0
2709 %% Test to see if parskip is larger than space between lines of
2710 %% table. If not, do nothing.
2711 %% If so, set to same dimension as multitablelinespace.
2712 \ifdim\multitableparskip>\multitablelinespace
2713 \global\multitableparskip=\multitablelinespace
2714 \global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
2715 %% than skip between lines in the table.
2717 \ifdim\multitableparskip=0pt
2718 \global\multitableparskip=\multitablelinespace
2719 \global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
2720 %% than skip between lines in the table.
2724 \message{conditionals,}
2726 % @iftex, @ifnotdocbook, @ifnothtml, @ifnotinfo, @ifnotplaintext,
2727 % @ifnotxml always succeed. They currently do nothing; we don't
2728 % attempt to check whether the conditionals are properly nested. But we
2729 % have to remember that they are conditionals, so that @end doesn't
2730 % attempt to close an environment group.
2733 \expandafter\let\csname #1\endcsname = \relax
2734 \expandafter\let\csname iscond.#1\endcsname = 1
2737 \makecond{ifnotdocbook}
2738 \makecond{ifnothtml}
2739 \makecond{ifnotinfo}
2740 \makecond{ifnotplaintext}
2743 % Ignore @ignore, @ifhtml, @ifinfo, and the like.
2745 \def\direntry{\doignore{direntry}}
2746 \def\documentdescription{\doignore{documentdescription}}
2747 \def\docbook{\doignore{docbook}}
2748 \def\html{\doignore{html}}
2749 \def\ifdocbook{\doignore{ifdocbook}}
2750 \def\ifhtml{\doignore{ifhtml}}
2751 \def\ifinfo{\doignore{ifinfo}}
2752 \def\ifnottex{\doignore{ifnottex}}
2753 \def\ifplaintext{\doignore{ifplaintext}}
2754 \def\ifxml{\doignore{ifxml}}
2755 \def\ignore{\doignore{ignore}}
2756 \def\menu{\doignore{menu}}
2757 \def\xml{\doignore{xml}}
2759 % Ignore text until a line `@end #1', keeping track of nested conditionals.
2761 % A count to remember the depth of nesting.
2762 \newcount\doignorecount
2764 \def\doignore#1{\begingroup
2765 % Scan in ``verbatim'' mode:
2766 \catcode`\@ = \other
2767 \catcode`\{ = \other
2768 \catcode`\} = \other
2770 % Make sure that spaces turn into tokens that match what \doignoretext wants.
2773 % Count number of #1's that we've seen.
2776 % Swallow text until we reach the matching `@end #1'.
2780 { \catcode`_=11 % We want to use \_STOP_ which cannot appear in texinfo source.
2783 \gdef\dodoignore#1{%
2784 % #1 contains the string `ifinfo'.
2786 % Define a command to find the next `@end #1', which must be on a line
2788 \long\def\doignoretext##1^^M@end #1{\doignoretextyyy##1^^M@#1\_STOP_}%
2789 % And this command to find another #1 command, at the beginning of a
2790 % line. (Otherwise, we would consider a line `@c @ifset', for
2791 % example, to count as an @ifset for nesting.)
2792 \long\def\doignoretextyyy##1^^M@#1##2\_STOP_{\doignoreyyy{##2}\_STOP_}%
2794 % And now expand that command.
2800 \def\doignoreyyy#1{%
2802 \ifx\temp\empty % Nothing found.
2803 \let\next\doignoretextzzz
2804 \else % Found a nested condition, ...
2805 \advance\doignorecount by 1
2806 \let\next\doignoretextyyy % ..., look for another.
2807 % If we're here, #1 ends with ^^M\ifinfo (for example).
2809 \next #1% the token \_STOP_ is present just after this macro.
2812 % We have to swallow the remaining "\_STOP_".
2814 \def\doignoretextzzz#1{%
2815 \ifnum\doignorecount = 0 % We have just found the outermost @end.
2816 \let\next\enddoignore
2817 \else % Still inside a nested condition.
2818 \advance\doignorecount by -1
2819 \let\next\doignoretext % Look for the next @end.
2824 % Finish off ignored text.
2825 \def\enddoignore{\endgroup\ignorespaces}
2828 % @set VAR sets the variable VAR to an empty value.
2829 % @set VAR REST-OF-LINE sets VAR to the value REST-OF-LINE.
2831 % Since we want to separate VAR from REST-OF-LINE (which might be
2832 % empty), we can't just use \parsearg; we have to insert a space of our
2833 % own to delimit the rest of the line, and then take it out again if we
2835 % We rely on the fact that \parsearg sets \catcode`\ =10.
2837 \parseargdef\set{\setyyy#1 \endsetyyy}
2838 \def\setyyy#1 #2\endsetyyy{%
2840 \makevalueexpandable
2842 \edef\next{\gdef\makecsname{SET#1}}%
2850 % Remove the trailing space \setxxx inserted.
2851 \def\setzzz#1 \endsetzzz{\next{#1}}
2853 % @clear VAR clears (i.e., unsets) the variable VAR.
2855 \parseargdef\clear{%
2857 \makevalueexpandable
2858 \global\expandafter\let\csname SET#1\endcsname=\relax
2862 % @value{foo} gets the text saved in variable foo.
2863 \def\value{\begingroup\makevalueexpandable\valuexxx}
2864 \def\valuexxx#1{\expandablevalue{#1}\endgroup}
2866 \catcode`\- = \active \catcode`\_ = \active
2868 \gdef\makevalueexpandable{%
2869 \let\value = \expandablevalue
2870 % We don't want these characters active, ...
2871 \catcode`\-=\other \catcode`\_=\other
2872 % ..., but we might end up with active ones in the argument if
2873 % we're called from @code, as @code{@value{foo-bar_}}, though.
2874 % So \let them to their normal equivalents.
2875 \let-\realdash \let_\normalunderscore
2879 % We have this subroutine so that we can handle at least some @value's
2880 % properly in indexes (we call \makevalueexpandable in \indexdummies).
2881 % The command has to be fully expandable (if the variable is set), since
2882 % the result winds up in the index file. This means that if the
2883 % variable's value contains other Texinfo commands, it's almost certain
2884 % it will fail (although perhaps we could fix that with sufficient work
2885 % to do a one-level expansion on the result, instead of complete).
2887 \def\expandablevalue#1{%
2888 \expandafter\ifx\csname SET#1\endcsname\relax
2889 {[No value for ``#1'']}%
2890 \message{Variable `#1', used in @value, is not set.}%
2892 \csname SET#1\endcsname
2896 % @ifset VAR ... @end ifset reads the `...' iff VAR has been defined
2899 % To get special treatment of `@end ifset,' call \makeond and the redefine.
2902 \def\ifset{\parsearg{\doifset{\let\next=\ifsetfail}}}
2905 \makevalueexpandable
2907 \expandafter\ifx\csname SET#2\endcsname\relax
2908 #1% If not set, redefine \next.
2913 \def\ifsetfail{\doignore{ifset}}
2915 % @ifclear VAR ... @end ifclear reads the `...' iff VAR has never been
2916 % defined with @set, or has been undefined with @clear.
2918 % The `\else' inside the `\doifset' parameter is a trick to reuse the
2919 % above code: if the variable is not set, do nothing, if it is set,
2920 % then redefine \next to \ifclearfail.
2923 \def\ifclear{\parsearg{\doifset{\else \let\next=\ifclearfail}}}
2924 \def\ifclearfail{\doignore{ifclear}}
2926 % @dircategory CATEGORY -- specify a category of the dir file
2927 % which this file should belong to. Ignore this in TeX.
2928 \let\dircategory=\comment
2930 % @defininfoenclose.
2931 \let\definfoenclose=\comment
2935 % Index generation facilities
2937 % Define \newwrite to be identical to plain tex's \newwrite
2938 % except not \outer, so it can be used within \newindex.
2940 \gdef\newwrite{\alloc@7\write\chardef\sixt@@n}}
2942 % \newindex {foo} defines an index named foo.
2943 % It automatically defines \fooindex such that
2944 % \fooindex ...rest of line... puts an entry in the index foo.
2945 % It also defines \fooindfile to be the number of the output channel for
2946 % the file that accumulates this index. The file's extension is foo.
2947 % The name of an index should be no more than 2 characters long
2948 % for the sake of vms.
2952 \expandafter\newwrite \csname#1indfile\endcsname
2953 \openout \csname#1indfile\endcsname \jobname.#1 % Open the file
2955 \expandafter\xdef\csname#1index\endcsname{% % Define @#1index
2956 \noexpand\doindex{#1}}
2959 % @defindex foo == \newindex{foo}
2961 \def\defindex{\parsearg\newindex}
2963 % Define @defcodeindex, like @defindex except put all entries in @code.
2965 \def\defcodeindex{\parsearg\newcodeindex}
2967 \def\newcodeindex#1{%
2969 \expandafter\newwrite \csname#1indfile\endcsname
2970 \openout \csname#1indfile\endcsname \jobname.#1
2972 \expandafter\xdef\csname#1index\endcsname{%
2973 \noexpand\docodeindex{#1}}%
2977 % @synindex foo bar makes index foo feed into index bar.
2978 % Do this instead of @defindex foo if you don't want it as a separate index.
2980 % @syncodeindex foo bar similar, but put all entries made for index foo
2983 \def\synindex#1 #2 {\dosynindex\doindex{#1}{#2}}
2984 \def\syncodeindex#1 #2 {\dosynindex\docodeindex{#1}{#2}}
2986 % #1 is \doindex or \docodeindex, #2 the index getting redefined (foo),
2987 % #3 the target index (bar).
2988 \def\dosynindex#1#2#3{%
2989 % Only do \closeout if we haven't already done it, else we'll end up
2990 % closing the target index.
2991 \expandafter \ifx\csname donesynindex#2\endcsname \undefined
2992 % The \closeout helps reduce unnecessary open files; the limit on the
2993 % Acorn RISC OS is a mere 16 files.
2994 \expandafter\closeout\csname#2indfile\endcsname
2995 \expandafter\let\csname\donesynindex#2\endcsname = 1
2997 % redefine \fooindfile:
2998 \expandafter\let\expandafter\temp\expandafter=\csname#3indfile\endcsname
2999 \expandafter\let\csname#2indfile\endcsname=\temp
3000 % redefine \fooindex:
3001 \expandafter\xdef\csname#2index\endcsname{\noexpand#1{#3}}%
3004 % Define \doindex, the driver for all \fooindex macros.
3005 % Argument #1 is generated by the calling \fooindex macro,
3006 % and it is "foo", the name of the index.
3008 % \doindex just uses \parsearg; it calls \doind for the actual work.
3009 % This is because \doind is more useful to call from other macros.
3011 % There is also \dosubind {index}{topic}{subtopic}
3012 % which makes an entry in a two-level index such as the operation index.
3014 \def\doindex#1{\edef\indexname{#1}\parsearg\singleindexer}
3015 \def\singleindexer #1{\doind{\indexname}{#1}}
3017 % like the previous two, but they put @code around the argument.
3018 \def\docodeindex#1{\edef\indexname{#1}\parsearg\singlecodeindexer}
3019 \def\singlecodeindexer #1{\doind{\indexname}{\code{#1}}}
3021 % Take care of Texinfo commands that can appear in an index entry.
3022 % Since there are some commands we want to expand, and others we don't,
3023 % we have to laboriously prevent expansion for those that we don't.
3026 \def\@{@}% change to @@ when we switch to @ as escape char in index files.
3027 \def\ {\realbackslash\space }%
3028 % Need these in case \tex is in effect and \{ is a \delimiter again.
3029 % But can't use \lbracecmd and \rbracecmd because texindex assumes
3030 % braces and backslashes are used only as delimiters.
3034 % \definedummyword defines \#1 as \realbackslash #1\space, thus
3035 % effectively preventing its expansion. This is used only for control
3036 % words, not control letters, because the \space would be incorrect
3037 % for control characters, but is needed to separate the control word
3038 % from whatever follows.
3040 % For control letters, we have \definedummyletter, which omits the
3043 % These can be used both for control words that take an argument and
3044 % those that do not. If it is followed by {arg} in the input, then
3045 % that will dutifully get written to the index (or wherever).
3047 \def\definedummyword##1{%
3048 \expandafter\def\csname ##1\endcsname{\realbackslash ##1\space}%
3050 \def\definedummyletter##1{%
3051 \expandafter\def\csname ##1\endcsname{\realbackslash ##1}%
3054 % Do the redefinitions.
3058 % For the aux file, @ is the escape character. So we want to redefine
3059 % everything using @ instead of \realbackslash. When everything uses
3060 % @, this will be simpler.
3065 \let\{ = \lbraceatcmd
3066 \let\} = \rbraceatcmd
3068 % (See comments in \indexdummies.)
3069 \def\definedummyword##1{%
3070 \expandafter\def\csname ##1\endcsname{@##1\space}%
3072 \def\definedummyletter##1{%
3073 \expandafter\def\csname ##1\endcsname{@##1}%
3076 % Do the redefinitions.
3080 % Called from \indexdummies and \atdummies. \definedummyword and
3081 % \definedummyletter must be defined first.
3083 \def\commondummies{%
3085 \normalturnoffactive
3087 \commondummiesnofonts
3089 \definedummyletter{_}%
3091 % Non-English letters.
3092 \definedummyword{AA}%
3093 \definedummyword{AE}%
3094 \definedummyword{L}%
3095 \definedummyword{OE}%
3096 \definedummyword{O}%
3097 \definedummyword{aa}%
3098 \definedummyword{ae}%
3099 \definedummyword{l}%
3100 \definedummyword{oe}%
3101 \definedummyword{o}%
3102 \definedummyword{ss}%
3103 \definedummyword{exclamdown}%
3104 \definedummyword{questiondown}%
3105 \definedummyword{ordf}%
3106 \definedummyword{ordm}%
3108 % Although these internal commands shouldn't show up, sometimes they do.
3109 \definedummyword{bf}%
3110 \definedummyword{gtr}%
3111 \definedummyword{hat}%
3112 \definedummyword{less}%
3113 \definedummyword{sf}%
3114 \definedummyword{sl}%
3115 \definedummyword{tclose}%
3116 \definedummyword{tt}%
3118 \definedummyword{LaTeX}%
3119 \definedummyword{TeX}%
3121 % Assorted special characters.
3122 \definedummyword{bullet}%
3123 \definedummyword{copyright}%
3124 \definedummyword{registeredsymbol}%
3125 \definedummyword{dots}%
3126 \definedummyword{enddots}%
3127 \definedummyword{equiv}%
3128 \definedummyword{error}%
3129 \definedummyword{expansion}%
3130 \definedummyword{minus}%
3131 \definedummyword{pounds}%
3132 \definedummyword{point}%
3133 \definedummyword{print}%
3134 \definedummyword{result}%
3136 % Handle some cases of @value -- where it does not contain any
3137 % (non-fully-expandable) commands.
3138 \makevalueexpandable
3140 % Normal spaces, not active ones.
3143 % No macro expansion.
3147 % \commondummiesnofonts: common to \commondummies and \indexnofonts.
3149 % Better have this without active chars.
3152 \gdef\commondummiesnofonts{%
3153 % Control letters and accents.
3154 \definedummyletter{!}%
3155 \definedummyletter{"}%
3156 \definedummyletter{'}%
3157 \definedummyletter{*}%
3158 \definedummyletter{,}%
3159 \definedummyletter{.}%
3160 \definedummyletter{/}%
3161 \definedummyletter{:}%
3162 \definedummyletter{=}%
3163 \definedummyletter{?}%
3164 \definedummyletter{^}%
3165 \definedummyletter{`}%
3166 \definedummyletter{~}%
3167 \definedummyword{u}%
3168 \definedummyword{v}%
3169 \definedummyword{H}%
3170 \definedummyword{dotaccent}%
3171 \definedummyword{ringaccent}%
3172 \definedummyword{tieaccent}%
3173 \definedummyword{ubaraccent}%
3174 \definedummyword{udotaccent}%
3175 \definedummyword{dotless}%
3177 % Texinfo font commands.
3178 \definedummyword{b}%
3179 \definedummyword{i}%
3180 \definedummyword{r}%
3181 \definedummyword{sc}%
3182 \definedummyword{t}%
3184 % Commands that take arguments.
3185 \definedummyword{acronym}%
3186 \definedummyword{cite}%
3187 \definedummyword{code}%
3188 \definedummyword{command}%
3189 \definedummyword{dfn}%
3190 \definedummyword{emph}%
3191 \definedummyword{env}%
3192 \definedummyword{file}%
3193 \definedummyword{kbd}%
3194 \definedummyword{key}%
3195 \definedummyword{math}%
3196 \definedummyword{option}%
3197 \definedummyword{samp}%
3198 \definedummyword{strong}%
3199 \definedummyword{tie}%
3200 \definedummyword{uref}%
3201 \definedummyword{url}%
3202 \definedummyword{var}%
3203 \definedummyword{verb}%
3204 \definedummyword{w}%
3208 % \indexnofonts is used when outputting the strings to sort the index
3209 % by, and when constructing control sequence names. It eliminates all
3210 % control sequences and just writes whatever the best ASCII sort string
3211 % would be for a given command (usually its argument).
3214 \def\definedummyword##1{%
3215 \expandafter\let\csname ##1\endcsname\asis
3217 \let\definedummyletter=\definedummyword
3219 \commondummiesnofonts
3221 % Don't no-op \tt, since it isn't a user-level command
3222 % and is used in the definitions of the active chars like <, >, |, etc.
3223 % Likewise with the other plain tex font commands.
3228 % how to handle braces?
3229 \def\_{\normalunderscore}%
3231 % Non-English letters.
3244 \def\questiondown{?}%
3251 % Assorted special characters.
3252 % (The following {} will end up in the sort string, but that's ok.)
3253 \def\bullet{bullet}%
3254 \def\copyright{copyright}%
3255 \def\registeredsymbol{R}%
3260 \def\expansion{==>}%
3262 \def\pounds{pounds}%
3268 \let\indexbackslash=0 %overridden during \printindex.
3269 \let\SETmarginindex=\relax % put index entries in margin (undocumented)?
3271 % Most index entries go through here, but \dosubind is the general case.
3272 % #1 is the index name, #2 is the entry text.
3273 \def\doind#1#2{\dosubind{#1}{#2}{}}
3275 % Workhorse for all \fooindexes.
3276 % #1 is name of index, #2 is stuff to put there, #3 is subentry --
3277 % empty if called from \doind, as we usually are (the main exception
3278 % is with most defuns, which call us directly).
3280 \def\dosubind#1#2#3{%
3283 % Store the main index entry text (including the third arg).
3285 % If third arg is present, precede it with a space.
3287 \ifx\thirdarg\empty \else
3288 \toks0 = \expandafter{\the\toks0 \space #3}%
3291 \edef\writeto{\csname#1indfile\endcsname}%
3302 % Write the entry in \toks0 to the index file:
3304 \def\dosubindwrite{%
3305 % Put the index entry in the margin if desired.
3306 \ifx\SETmarginindex\relax\else
3307 \insert\margin{\hbox{\vrule height8pt depth3pt width0pt \the\toks0}}%
3310 % Remember, we are within a group.
3311 \indexdummies % Must do this here, since \bf, etc expand at this stage
3313 \def\backslashcurfont{\indexbackslash}% \indexbackslash isn't defined now
3314 % so it will be output as is; and it will print as backslash.
3316 % Process the index entry with all font commands turned off, to
3317 % get the string to sort by.
3319 \edef\temp{\the\toks0}% need full expansion
3320 \xdef\indexsorttmp{\temp}%
3323 % Set up the complete index entry, with both the sort key and
3324 % the original text, including any font commands. We write
3325 % three arguments to \entry to the .?? file (four in the
3326 % subentry case), texindex reduces to two when writing the .??s
3330 \string\entry{\indexsorttmp}{\noexpand\folio}{\the\toks0}}%
3335 % Take care of unwanted page breaks:
3337 % If a skip is the last thing on the list now, preserve it
3338 % by backing up by \lastskip, doing the \write, then inserting
3339 % the skip again. Otherwise, the whatsit generated by the
3340 % \write will make \lastskip zero. The result is that sequences
3345 % will have extra space inserted, because the \medbreak in the
3346 % start of the @defun won't see the skip inserted by the @end of
3347 % the previous defun.
3349 % But don't do any of this if we're not in vertical mode. We
3350 % don't want to do a \vskip and prematurely end a paragraph.
3352 % Avoid page breaks due to these extra skips, too.
3354 % But wait, there is a catch there:
3355 % We'll have to check whether \lastskip is zero skip. \ifdim is not
3356 % sufficient for this purpose, as it ignores stretch and shrink parts
3357 % of the skip. The only way seems to be to check the textual
3358 % representation of the skip.
3360 % The following is almost like \def\zeroskipmacro{0.0pt} except that
3361 % the ``p'' and ``t'' characters have catcode \other, not 11 (letter).
3363 \edef\zeroskipmacro{\expandafter\the\csname z@skip\endcsname}
3367 \def\dosubindsanitize{%
3368 % \lastskip and \lastpenalty cannot both be nonzero simultaneously.
3370 \edef\lastskipmacro{\the\lastskip}%
3371 \count255 = \lastpenalty
3373 % If \lastskip is nonzero, that means the last item was a
3374 % skip. And since a skip is discardable, that means this
3375 % -\skip0 glue we're inserting is preceded by a
3376 % non-discardable item, therefore it is not a potential
3377 % breakpoint, therefore no \nobreak needed.
3378 \ifx\lastskipmacro\zeroskipmacro
3385 \ifx\lastskipmacro\zeroskipmacro
3386 % if \lastskip was zero, perhaps the last item was a
3387 % penalty, and perhaps it was >=10000, e.g., a \nobreak.
3388 % In that case, we want to re-insert the penalty; since we
3389 % just inserted a non-discardable item, any following glue
3390 % (such as a \parskip) would be a breakpoint. For example:
3391 % @deffn deffn-whatever
3392 % @vindex index-whatever
3394 % would allow a break between the index-whatever whatsit
3395 % and the "Description." paragraph.
3396 \ifnum\count255>9999 \nobreak \fi
3398 % On the other hand, if we had a nonzero \lastskip,
3399 % this make-up glue would be preceded by a non-discardable item
3400 % (the whatsit from the \write), so we must insert a \nobreak.
3401 \nobreak\vskip\skip0
3405 % The index entry written in the file actually looks like
3406 % \entry {sortstring}{page}{topic}
3408 % \entry {sortstring}{page}{topic}{subtopic}
3409 % The texindex program reads in these files and writes files
3410 % containing these kinds of lines:
3412 % before the first topic whose initial is c
3413 % \entry {topic}{pagelist}
3414 % for a topic that is used without subtopics
3416 % for the beginning of a topic that is used with subtopics
3417 % \secondary {subtopic}{pagelist}
3418 % for each subtopic.
3420 % Define the user-accessible indexing commands
3421 % @findex, @vindex, @kindex, @cindex.
3423 \def\findex {\fnindex}
3424 \def\kindex {\kyindex}
3425 \def\cindex {\cpindex}
3426 \def\vindex {\vrindex}
3427 \def\tindex {\tpindex}
3428 \def\pindex {\pgindex}
3430 \def\cindexsub {\begingroup\obeylines\cindexsub}
3432 \gdef\cindexsub "#1" #2^^M{\endgroup %
3433 \dosubind{cp}{#2}{#1}}}
3435 % Define the macros used in formatting output of the sorted index material.
3437 % @printindex causes a particular index (the ??s file) to get printed.
3438 % It does not print any chapter heading (usually an @unnumbered).
3440 \parseargdef\printindex{\begingroup
3441 \dobreak \chapheadingskip{10000}%
3445 \everypar = {}% don't want the \kern\-parindent from indentation suppression.
3447 % See if the index file exists and is nonempty.
3448 % Change catcode of @ here so that if the index file contains
3450 % as its first line, TeX doesn't complain about mismatched braces
3451 % (because it thinks @} is a control sequence).
3453 \openin 1 \jobname.#1s
3455 % \enddoublecolumns gets confused if there is no text in the index,
3456 % and it loses the chapter title and the aux file entries for the
3457 % index. The easiest way to prevent this problem is to make sure
3458 % there is some text.
3459 \putwordIndexNonexistent
3462 % If the index file exists but is empty, then \openin leaves \ifeof
3463 % false. We have to make TeX try to read something from the file, so
3464 % it can discover if there is anything in it.
3467 \putwordIndexIsEmpty
3469 % Index files are almost Texinfo source, but we use \ as the escape
3470 % character. It would be better to use @, but that's too big a change
3471 % to make right now.
3472 \def\indexbackslash{\backslashcurfont}%
3483 % These macros are used by the sorted index file itself.
3484 % Change them to control the appearance of the index.
3487 % Some minor font changes for the special characters.
3488 \let\tentt=\sectt \let\tt=\sectt \let\sf=\sectt
3490 % Remove any glue we may have, we'll be inserting our own.
3493 % We like breaks before the index initials, so insert a bonus.
3496 % Typeset the initial. Making this add up to a whole number of
3497 % baselineskips increases the chance of the dots lining up from column
3498 % to column. It still won't often be perfect, because of the stretch
3499 % we need before each entry, but it's better.
3501 % No shrink because it confuses \balancecolumns.
3502 \vskip 1.67\baselineskip plus .5\baselineskip
3503 \leftline{\secbf #1}%
3504 \vskip .33\baselineskip plus .1\baselineskip
3506 % Do our best not to break after the initial.
3510 % \entry typesets a paragraph consisting of the text (#1), dot leaders, and
3511 % then page number (#2) flushed to the right margin. It is used for index
3512 % and table of contents entries. The paragraph is indented by \leftskip.
3514 % A straightforward implementation would start like this:
3515 % \def\entry#1#2{...
3516 % But this frozes the catcodes in the argument, and can cause problems to
3517 % @code, which sets - active. This problem was fixed by a kludge---
3518 % ``-'' was active throughout whole index, but this isn't really right.
3520 % The right solution is to prevent \entry from swallowing the whole text.
3525 % Start a new paragraph if necessary, so our assignments below can't
3526 % affect previous text.
3529 % Do not fill out the last line with white space.
3532 % No extra space above this paragraph.
3535 % Do not prefer a separate line ending with a hyphen to fewer lines.
3536 \finalhyphendemerits = 0
3538 % \hangindent is only relevant when the entry text and page number
3539 % don't both fit on one line. In that case, bob suggests starting the
3540 % dots pretty far over on the line. Unfortunately, a large
3541 % indentation looks wrong when the entry text itself is broken across
3542 % lines. So we use a small indentation and put up with long leaders.
3544 % \hangafter is reset to 1 (which is the value we want) at the start
3545 % of each paragraph, so we need not do anything with that.
3548 % When the entry text needs to be broken, just fill out the first line
3550 \rightskip = 0pt plus1fil
3552 % A bit of stretch before each entry for the benefit of balancing
3556 % Swallow the left brace of the text (first parameter):
3557 \afterassignment\doentry
3561 \bgroup % Instead of the swallowed brace.
3563 \aftergroup\finishentry
3564 % And now comes the text of the entry.
3566 \def\finishentry#1{%
3567 % #1 is the page number.
3569 % The following is kludged to not output a line of dots in the index if
3570 % there are no page numbers. The next person who breaks this will be
3571 % cursed by a Unix daemon.
3574 \edef\tempc{\tempa}%
3575 \edef\tempd{\tempb}%
3580 % If we must, put the page number on a line of its own, and fill out
3581 % this line with blank space. (The \hfil is overwhelmed with the
3582 % fill leaders glue in \indexdotfill if the page number does fit.)
3584 \null\nobreak\indexdotfill % Have leaders before the page number.
3586 % The `\ ' here is removed by the implicit \unskip that TeX does as
3587 % part of (the primitive) \par. Without it, a spurious underfull
3600 % Like \dotfill except takes at least 1 em.
3601 \def\indexdotfill{\cleaders
3602 \hbox{$\mathsurround=0pt \mkern1.5mu ${\it .}$ \mkern1.5mu$}\hskip 1em plus 1fill}
3604 \def\primary #1{\line{#1\hfil}}
3606 \newskip\secondaryindent \secondaryindent=0.5cm
3607 \def\secondary#1#2{{%
3612 \noindent\hskip\secondaryindent\hbox{#1}\indexdotfill
3614 \pdfgettoks#2.\ \the\toksA % The page number ends the paragraph.
3621 % Define two-column mode, which we use to typeset indexes.
3622 % Adapted from the TeXbook, page 416, which is to say,
3623 % the manmac.tex format used to print the TeXbook itself.
3627 \newdimen\doublecolumnhsize
3629 \def\begindoublecolumns{\begingroup % ended by \enddoublecolumns
3630 % Grab any single-column material above us.
3633 % Here is a possibility not foreseen in manmac: if we accumulate a
3634 % whole lot of material, we might end up calling this \output
3635 % routine twice in a row (see the doublecol-lose test, which is
3636 % essentially a couple of indexes with @setchapternewpage off). In
3637 % that case we just ship out what is in \partialpage with the normal
3638 % output routine. Generally, \partialpage will be empty when this
3639 % runs and this will be a no-op. See the indexspread.tex test case.
3640 \ifvoid\partialpage \else
3641 \onepageout{\pagecontents\partialpage}%
3644 \global\setbox\partialpage = \vbox{%
3645 % Unvbox the main output page.
3647 \kern-\topskip \kern\baselineskip
3650 \eject % run that output routine to set \partialpage
3652 % Use the double-column output routine for subsequent pages.
3653 \output = {\doublecolumnout}%
3655 % Change the page size parameters. We could do this once outside this
3656 % routine, in each of @smallbook, @afourpaper, and the default 8.5x11
3657 % format, but then we repeat the same computation. Repeating a couple
3658 % of assignments once per index is clearly meaningless for the
3659 % execution time, so we may as well do it in one place.
3661 % First we halve the line length, less a little for the gutter between
3662 % the columns. We compute the gutter based on the line length, so it
3663 % changes automatically with the paper format. The magic constant
3664 % below is chosen so that the gutter has the same value (well, +-<1pt)
3665 % as it did when we hard-coded it.
3667 % We put the result in a separate register, \doublecolumhsize, so we
3668 % can restore it in \pagesofar, after \hsize itself has (potentially)
3671 \doublecolumnhsize = \hsize
3672 \advance\doublecolumnhsize by -.04154\hsize
3673 \divide\doublecolumnhsize by 2
3674 \hsize = \doublecolumnhsize
3676 % Double the \vsize as well. (We don't need a separate register here,
3677 % since nobody clobbers \vsize.)
3681 % The double-column output routine for all double-column pages except
3684 \def\doublecolumnout{%
3685 \splittopskip=\topskip \splitmaxdepth=\maxdepth
3686 % Get the available space for the double columns -- the normal
3687 % (undoubled) page height minus any material left over from the
3691 \advance\dimen@ by -\ht\partialpage
3693 % box0 will be the left-hand column, box2 the right.
3694 \setbox0=\vsplit255 to\dimen@ \setbox2=\vsplit255 to\dimen@
3695 \onepageout\pagesofar
3697 \penalty\outputpenalty
3700 % Re-output the contents of the output page -- any previous material,
3701 % followed by the two boxes we just split, in box0 and box2.
3705 \hsize = \doublecolumnhsize
3706 \wd0=\hsize \wd2=\hsize
3707 \hbox to\pagewidth{\box0\hfil\box2}%
3710 % All done with double columns.
3711 \def\enddoublecolumns{%
3713 % Split the last of the double-column material. Leave it on the
3714 % current page, no automatic page break.
3717 % If we end up splitting too much material for the current page,
3718 % though, there will be another page break right after this \output
3719 % invocation ends. Having called \balancecolumns once, we do not
3720 % want to call it again. Therefore, reset \output to its normal
3721 % definition right away. (We hope \balancecolumns will never be
3722 % called on to balance too much material, but if it is, this makes
3723 % the output somewhat more palatable.)
3724 \global\output = {\onepageout{\pagecontents\PAGE}}%
3727 \endgroup % started in \begindoublecolumns
3729 % \pagegoal was set to the doubled \vsize above, since we restarted
3730 % the current page. We're now back to normal single-column
3731 % typesetting, so reset \pagegoal to the normal \vsize (after the
3732 % \endgroup where \vsize got restored).
3736 % Called at the end of the double column material.
3737 \def\balancecolumns{%
3738 \setbox0 = \vbox{\unvbox255}% like \box255 but more efficient, see p.120.
3740 \advance\dimen@ by \topskip
3741 \advance\dimen@ by-\baselineskip
3742 \divide\dimen@ by 2 % target to split to
3743 %debug\message{final 2-column material height=\the\ht0, target=\the\dimen@.}%
3744 \splittopskip = \topskip
3745 % Loop until we get a decent breakpoint.
3749 \global\setbox3 = \copy0
3750 \global\setbox1 = \vsplit3 to \dimen@
3752 \global\advance\dimen@ by 1pt
3755 %debug\message{split to \the\dimen@, column heights: \the\ht1, \the\ht3.}%
3756 \setbox0=\vbox to\dimen@{\unvbox1}%
3757 \setbox2=\vbox to\dimen@{\unvbox3}%
3761 \catcode`\@ = \other
3764 \message{sectioning,}
3765 % Chapters, sections, etc.
3767 % \unnumberedno is an oxymoron, of course. But we count the unnumbered
3768 % sections so that we can refer to them unambiguously in the pdf
3769 % outlines by their "section number". We avoid collisions with chapter
3770 % numbers by starting them at 10000. (If a document ever has 10000
3771 % chapters, we're in trouble anyway, I'm sure.)
3772 \newcount\unnumberedno \unnumberedno = 10000
3774 \newcount\secno \secno=0
3775 \newcount\subsecno \subsecno=0
3776 \newcount\subsubsecno \subsubsecno=0
3778 % This counter is funny since it counts through charcodes of letters A, B, ...
3779 \newcount\appendixno \appendixno = `\@
3781 % \def\appendixletter{\char\the\appendixno}
3782 % We do the following ugly conditional instead of the above simple
3783 % construct for the sake of pdftex, which needs the actual
3784 % letter in the expansion, not just typeset.
3786 \def\appendixletter{%
3787 \ifnum\appendixno=`A A%
3788 \else\ifnum\appendixno=`B B%
3789 \else\ifnum\appendixno=`C C%
3790 \else\ifnum\appendixno=`D D%
3791 \else\ifnum\appendixno=`E E%
3792 \else\ifnum\appendixno=`F F%
3793 \else\ifnum\appendixno=`G G%
3794 \else\ifnum\appendixno=`H H%
3795 \else\ifnum\appendixno=`I I%
3796 \else\ifnum\appendixno=`J J%
3797 \else\ifnum\appendixno=`K K%
3798 \else\ifnum\appendixno=`L L%
3799 \else\ifnum\appendixno=`M M%
3800 \else\ifnum\appendixno=`N N%
3801 \else\ifnum\appendixno=`O O%
3802 \else\ifnum\appendixno=`P P%
3803 \else\ifnum\appendixno=`Q Q%
3804 \else\ifnum\appendixno=`R R%
3805 \else\ifnum\appendixno=`S S%
3806 \else\ifnum\appendixno=`T T%
3807 \else\ifnum\appendixno=`U U%
3808 \else\ifnum\appendixno=`V V%
3809 \else\ifnum\appendixno=`W W%
3810 \else\ifnum\appendixno=`X X%
3811 \else\ifnum\appendixno=`Y Y%
3812 \else\ifnum\appendixno=`Z Z%
3813 % The \the is necessary, despite appearances, because \appendixletter is
3814 % expanded while writing the .toc file. \char\appendixno is not
3815 % expandable, thus it is written literally, thus all appendixes come out
3816 % with the same letter (or @) in the toc without it.
3817 \else\char\the\appendixno
3818 \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
3819 \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi}
3821 % Each @chapter defines this as the name of the chapter.
3822 % page headings and footings can use it. @section does likewise.
3823 % However, they are not reliable, because we don't use marks.
3827 \newcount\absseclevel % used to calculate proper heading level
3828 \newcount\secbase\secbase=0 % @raisesections/@lowersections modify this count
3830 % @raisesections: treat @section as chapter, @subsection as section, etc.
3831 \def\raisesections{\global\advance\secbase by -1}
3832 \let\up=\raisesections % original BFox name
3834 % @lowersections: treat @chapter as section, @section as subsection, etc.
3835 \def\lowersections{\global\advance\secbase by 1}
3836 \let\down=\lowersections % original BFox name
3838 % we only have subsub.
3839 \chardef\maxseclevel = 3
3841 % A numbered section within an unnumbered changes to unnumbered too.
3842 % To achive this, remember the "biggest" unnum. sec. we are currently in:
3843 \chardef\unmlevel = \maxseclevel
3845 % Trace whether the current chapter is an appendix or not:
3846 % \chapheadtype is "N" or "A", unnumbered chapters are ignored.
3847 \def\chapheadtype{N}
3849 % Choose a heading macro
3850 % #1 is heading type
3851 % #2 is heading level
3852 % #3 is text for heading
3853 \def\genhead#1#2#3{%
3854 % Compute the abs. sec. level:
3856 \advance\absseclevel by \secbase
3857 % Make sure \absseclevel doesn't fall outside the range:
3858 \ifnum \absseclevel < 0
3861 \ifnum \absseclevel > 3
3868 \ifnum \absseclevel < \unmlevel
3869 \chardef\unmlevel = \absseclevel
3872 % Check for appendix sections:
3873 \ifnum \absseclevel = 0
3874 \edef\chapheadtype{\headtype}%
3876 \if \headtype A\if \chapheadtype N%
3877 \errmessage{@appendix... within a non-appendix chapter}%
3880 % Check for numbered within unnumbered:
3881 \ifnum \absseclevel > \unmlevel
3884 \chardef\unmlevel = 3
3887 % Now print the heading:
3891 \or \unnumberedseczzz{#3}%
3892 \or \unnumberedsubseczzz{#3}%
3893 \or \unnumberedsubsubseczzz{#3}%
3899 \or \appendixsectionzzz{#3}%
3900 \or \appendixsubseczzz{#3}%
3901 \or \appendixsubsubseczzz{#3}%
3907 \or \numberedsubseczzz{#3}%
3908 \or \numberedsubsubseczzz{#3}%
3912 \suppressfirstparagraphindent
3916 \def\numhead{\genhead N}
3917 \def\apphead{\genhead A}
3918 \def\unnmhead{\genhead U}
3920 % @chapter, @appendix, @unnumbered. Increment top-level counter, reset
3921 % all lower-level sectioning counters to zero.
3923 % Also set \chaplevelprefix, which we prepend to @float sequence numbers
3924 % (e.g., figures), q.v. By default (before any chapter), that is empty.
3925 \let\chaplevelprefix = \empty
3927 \outer\parseargdef\chapter{\numhead0{#1}} % normally numhead0 calls chapterzzz
3929 % section resetting is \global in case the chapter is in a group, such
3930 % as an @include file.
3931 \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
3932 \global\advance\chapno by 1
3935 \gdef\chaplevelprefix{\the\chapno.}%
3938 \message{\putwordChapter\space \the\chapno}%
3940 % Write the actual heading.
3941 \chapmacro{#1}{Ynumbered}{\the\chapno}%
3943 % So @section and the like are numbered underneath this chapter.
3944 \global\let\section = \numberedsec
3945 \global\let\subsection = \numberedsubsec
3946 \global\let\subsubsection = \numberedsubsubsec
3949 \outer\parseargdef\appendix{\apphead0{#1}} % normally apphead0 calls appendixzzz
3950 \def\appendixzzz#1{%
3951 \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
3952 \global\advance\appendixno by 1
3953 \gdef\chaplevelprefix{\appendixletter.}%
3956 \def\appendixnum{\putwordAppendix\space \appendixletter}%
3957 \message{\appendixnum}%
3959 \chapmacro{#1}{Yappendix}{\appendixletter}%
3961 \global\let\section = \appendixsec
3962 \global\let\subsection = \appendixsubsec
3963 \global\let\subsubsection = \appendixsubsubsec
3966 \outer\parseargdef\unnumbered{\unnmhead0{#1}} % normally unnmhead0 calls unnumberedzzz
3967 \def\unnumberedzzz#1{%
3968 \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
3969 \global\advance\unnumberedno by 1
3971 % Since an unnumbered has no number, no prefix for figures.
3972 \global\let\chaplevelprefix = \empty
3975 % This used to be simply \message{#1}, but TeX fully expands the
3976 % argument to \message. Therefore, if #1 contained @-commands, TeX
3977 % expanded them. For example, in `@unnumbered The @cite{Book}', TeX
3978 % expanded @cite (which turns out to cause errors because \cite is meant
3979 % to be executed, not expanded).
3981 % Anyway, we don't want the fully-expanded definition of @cite to appear
3982 % as a result of the \message, we just want `@cite' itself. We use
3983 % \the<toks register> to achieve this: TeX expands \the<toks> only once,
3984 % simply yielding the contents of <toks register>. (We also do this for
3987 \message{(\the\toks0)}%
3989 \chapmacro{#1}{Ynothing}{\the\unnumberedno}%
3991 \global\let\section = \unnumberedsec
3992 \global\let\subsection = \unnumberedsubsec
3993 \global\let\subsubsection = \unnumberedsubsubsec
3996 % @centerchap is like @unnumbered, but the heading is centered.
3997 \outer\parseargdef\centerchap{%
3998 % Well, we could do the following in a group, but that would break
3999 % an assumption that \chapmacro is called at the outermost level.
4000 % Thus we are safer this way: --kasal, 24feb04
4001 \let\centerparametersmaybe = \centerparameters
4003 \let\centerparametersmaybe = \relax
4006 % @top is like @unnumbered.
4010 \outer\parseargdef\numberedsec{\numhead1{#1}} % normally calls seczzz
4012 \global\subsecno=0 \global\subsubsecno=0 \global\advance\secno by 1
4013 \sectionheading{#1}{sec}{Ynumbered}{\the\chapno.\the\secno}%
4016 \outer\parseargdef\appendixsection{\apphead1{#1}} % normally calls appendixsectionzzz
4017 \def\appendixsectionzzz#1{%
4018 \global\subsecno=0 \global\subsubsecno=0 \global\advance\secno by 1
4019 \sectionheading{#1}{sec}{Yappendix}{\appendixletter.\the\secno}%
4021 \let\appendixsec\appendixsection
4023 \outer\parseargdef\unnumberedsec{\unnmhead1{#1}} % normally calls unnumberedseczzz
4024 \def\unnumberedseczzz#1{%
4025 \global\subsecno=0 \global\subsubsecno=0 \global\advance\secno by 1
4026 \sectionheading{#1}{sec}{Ynothing}{\the\unnumberedno.\the\secno}%
4030 \outer\parseargdef\numberedsubsec{\numhead2{#1}} % normally calls numberedsubseczzz
4031 \def\numberedsubseczzz#1{%
4032 \global\subsubsecno=0 \global\advance\subsecno by 1
4033 \sectionheading{#1}{subsec}{Ynumbered}{\the\chapno.\the\secno.\the\subsecno}%
4036 \outer\parseargdef\appendixsubsec{\apphead2{#1}} % normally calls appendixsubseczzz
4037 \def\appendixsubseczzz#1{%
4038 \global\subsubsecno=0 \global\advance\subsecno by 1
4039 \sectionheading{#1}{subsec}{Yappendix}%
4040 {\appendixletter.\the\secno.\the\subsecno}%
4043 \outer\parseargdef\unnumberedsubsec{\unnmhead2{#1}} %normally calls unnumberedsubseczzz
4044 \def\unnumberedsubseczzz#1{%
4045 \global\subsubsecno=0 \global\advance\subsecno by 1
4046 \sectionheading{#1}{subsec}{Ynothing}%
4047 {\the\unnumberedno.\the\secno.\the\subsecno}%
4051 \outer\parseargdef\numberedsubsubsec{\numhead3{#1}} % normally numberedsubsubseczzz
4052 \def\numberedsubsubseczzz#1{%
4053 \global\advance\subsubsecno by 1
4054 \sectionheading{#1}{subsubsec}{Ynumbered}%
4055 {\the\chapno.\the\secno.\the\subsecno.\the\subsubsecno}%
4058 \outer\parseargdef\appendixsubsubsec{\apphead3{#1}} % normally appendixsubsubseczzz
4059 \def\appendixsubsubseczzz#1{%
4060 \global\advance\subsubsecno by 1
4061 \sectionheading{#1}{subsubsec}{Yappendix}%
4062 {\appendixletter.\the\secno.\the\subsecno.\the\subsubsecno}%
4065 \outer\parseargdef\unnumberedsubsubsec{\unnmhead3{#1}} %normally unnumberedsubsubseczzz
4066 \def\unnumberedsubsubseczzz#1{%
4067 \global\advance\subsubsecno by 1
4068 \sectionheading{#1}{subsubsec}{Ynothing}%
4069 {\the\unnumberedno.\the\secno.\the\subsecno.\the\subsubsecno}%
4072 % These macros control what the section commands do, according
4073 % to what kind of chapter we are in (ordinary, appendix, or unnumbered).
4074 % Define them by default for a numbered chapter.
4075 \let\section = \numberedsec
4076 \let\subsection = \numberedsubsec
4077 \let\subsubsection = \numberedsubsubsec
4079 % Define @majorheading, @heading and @subheading
4081 % NOTE on use of \vbox for chapter headings, section headings, and such:
4082 % 1) We use \vbox rather than the earlier \line to permit
4083 % overlong headings to fold.
4084 % 2) \hyphenpenalty is set to 10000 because hyphenation in a
4085 % heading is obnoxious; this forbids it.
4086 % 3) Likewise, headings look best if no \parindent is used, and
4087 % if justification is not attempted. Hence \raggedright.
4091 {\advance\chapheadingskip by 10pt \chapbreak }%
4092 \parsearg\chapheadingzzz
4095 \def\chapheading{\chapbreak \parsearg\chapheadingzzz}
4096 \def\chapheadingzzz#1{%
4097 {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
4098 \parindent=0pt\raggedright
4100 \bigskip \par\penalty 200\relax
4101 \suppressfirstparagraphindent
4104 % @heading, @subheading, @subsubheading.
4105 \parseargdef\heading{\sectionheading{#1}{sec}{Yomitfromtoc}{}
4106 \suppressfirstparagraphindent}
4107 \parseargdef\subheading{\sectionheading{#1}{subsec}{Yomitfromtoc}{}
4108 \suppressfirstparagraphindent}
4109 \parseargdef\subsubheading{\sectionheading{#1}{subsubsec}{Yomitfromtoc}{}
4110 \suppressfirstparagraphindent}
4112 % These macros generate a chapter, section, etc. heading only
4113 % (including whitespace, linebreaking, etc. around it),
4114 % given all the information in convenient, parsed form.
4116 %%% Args are the skip and penalty (usually negative)
4117 \def\dobreak#1#2{\par\ifdim\lastskip<#1\removelastskip\penalty#2\vskip#1\fi}
4119 %%% Define plain chapter starts, and page on/off switching for it
4120 % Parameter controlling skip before chapter headings (if needed)
4122 \newskip\chapheadingskip
4124 \def\chapbreak{\dobreak \chapheadingskip {-4000}}
4125 \def\chappager{\par\vfill\supereject}
4126 \def\chapoddpage{\chappager \ifodd\pageno \else \hbox to 0pt{} \chappager\fi}
4128 \def\setchapternewpage #1 {\csname CHAPPAG#1\endcsname}
4131 \global\let\contentsalignmacro = \chappager
4132 \global\let\pchapsepmacro=\chapbreak
4133 \global\let\pagealignmacro=\chappager}
4136 \global\let\contentsalignmacro = \chappager
4137 \global\let\pchapsepmacro=\chappager
4138 \global\let\pagealignmacro=\chappager
4139 \global\def\HEADINGSon{\HEADINGSsingle}}
4142 \global\let\contentsalignmacro = \chapoddpage
4143 \global\let\pchapsepmacro=\chapoddpage
4144 \global\let\pagealignmacro=\chapoddpage
4145 \global\def\HEADINGSon{\HEADINGSdouble}}
4151 % #1 is the text, #2 is the section type (Ynumbered, Ynothing,
4152 % Yappendix, Yomitfromtoc), #3 the chapter number.
4154 % To test against our argument.
4155 \def\Ynothingkeyword{Ynothing}
4156 \def\Yomitfromtockeyword{Yomitfromtoc}
4157 \def\Yappendixkeyword{Yappendix}
4159 \def\chapmacro#1#2#3{%
4164 % Have to define \thissection before calling \donoderef, because the
4165 % xref code eventually uses it. On the other hand, it has to be called
4166 % after \pchapsepmacro, or the headline will change too soon.
4167 \gdef\thissection{#1}%
4168 \gdef\thischaptername{#1}%
4170 % Only insert the separating space if we have a chapter/appendix
4171 % number, and don't print the unnumbered ``number''.
4173 \ifx\temptype\Ynothingkeyword
4175 \def\toctype{unnchap}%
4176 \def\thischapter{#1}%
4177 \else\ifx\temptype\Yomitfromtockeyword
4178 \setbox0 = \hbox{}% contents like unnumbered, but no toc entry
4180 \xdef\thischapter{}%
4181 \else\ifx\temptype\Yappendixkeyword
4182 \setbox0 = \hbox{\putwordAppendix{} #3\enspace}%
4184 % We don't substitute the actual chapter name into \thischapter
4185 % because we don't want its macros evaluated now. And we don't
4186 % use \thissection because that changes with each section.
4188 \xdef\thischapter{\putwordAppendix{} \appendixletter:
4189 \noexpand\thischaptername}%
4191 \setbox0 = \hbox{#3\enspace}%
4192 \def\toctype{numchap}%
4193 \xdef\thischapter{\putwordChapter{} \the\chapno:
4194 \noexpand\thischaptername}%
4197 % Write the toc entry for this chapter. Must come before the
4198 % \donoderef, because we include the current node name in the toc
4199 % entry, and \donoderef resets it to empty.
4200 \writetocentry{\toctype}{#1}{#3}%
4202 % For pdftex, we have to write out the node definition (aka, make
4203 % the pdfdest) after any page break, but before the actual text has
4204 % been typeset. If the destination for the pdf outline is after the
4205 % text, then jumping from the outline may wind up with the text not
4206 % being visible, for instance under high magnification.
4209 % Typeset the actual heading.
4210 \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \raggedright
4211 \hangindent=\wd0 \centerparametersmaybe
4214 \nobreak\bigskip % no page break after a chapter title
4218 % @centerchap -- centered and unnumbered.
4219 \let\centerparametersmaybe = \relax
4220 \def\centerparameters{%
4221 \advance\rightskip by 3\rightskip
4222 \leftskip = \rightskip
4227 % I don't think this chapter style is supported any more, so I'm not
4228 % updating it with the new noderef stuff. We'll see. --karl, 11aug03.
4230 \def\setchapterstyle #1 {\csname CHAPF#1\endcsname}
4232 \def\unnchfopen #1{%
4233 \chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
4234 \parindent=0pt\raggedright
4235 \rm #1\hfill}}\bigskip \par\nobreak
4237 \def\chfopen #1#2{\chapoddpage {\chapfonts
4238 \vbox to 3in{\vfil \hbox to\hsize{\hfil #2} \hbox to\hsize{\hfil #1} \vfil}}%
4241 \def\centerchfopen #1{%
4242 \chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
4244 \hfill {\rm #1}\hfill}}\bigskip \par\nobreak
4247 \global\let\chapmacro=\chfopen
4248 \global\let\centerchapmacro=\centerchfopen}
4251 % Section titles. These macros combine the section number parts and
4252 % call the generic \sectionheading to do the printing.
4254 \newskip\secheadingskip
4255 \def\secheadingbreak{\dobreak \secheadingskip{-1000}}
4257 % Subsection titles.
4258 \newskip\subsecheadingskip
4259 \def\subsecheadingbreak{\dobreak \subsecheadingskip{-500}}
4261 % Subsubsection titles.
4262 \def\subsubsecheadingskip{\subsecheadingskip}
4263 \def\subsubsecheadingbreak{\subsecheadingbreak}
4266 % Print any size, any type, section title.
4268 % #1 is the text, #2 is the section level (sec/subsec/subsubsec), #3 is
4269 % the section type for xrefs (Ynumbered, Ynothing, Yappendix), #4 is the
4272 \def\sectionheading#1#2#3#4{%
4274 % Switch to the right set of fonts.
4275 \csname #2fonts\endcsname \rm
4277 % Insert space above the heading.
4278 \csname #2headingbreak\endcsname
4280 % Only insert the space after the number if we have a section number.
4281 \def\sectionlevel{#2}%
4284 \ifx\temptype\Ynothingkeyword
4287 \gdef\thissection{#1}%
4288 \else\ifx\temptype\Yomitfromtockeyword
4289 % for @headings -- no section number, don't include in toc,
4290 % and don't redefine \thissection.
4293 \let\sectionlevel=\empty
4294 \else\ifx\temptype\Yappendixkeyword
4295 \setbox0 = \hbox{#4\enspace}%
4297 \gdef\thissection{#1}%
4299 \setbox0 = \hbox{#4\enspace}%
4301 \gdef\thissection{#1}%
4304 % Write the toc entry (before \donoderef). See comments in \chfplain.
4305 \writetocentry{\toctype\sectionlevel}{#1}{#4}%
4307 % Write the node reference (= pdf destination for pdftex).
4308 % Again, see comments in \chfplain.
4311 % Output the actual section heading.
4312 \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \raggedright
4313 \hangindent=\wd0 % zero if no section number
4316 % Add extra space after the heading -- half of whatever came above it.
4317 % Don't allow stretch, though.
4318 \kern .5 \csname #2headingskip\endcsname
4320 % Do not let the kern be a potential breakpoint, as it would be if it
4321 % was followed by glue.
4324 % We'll almost certainly start a paragraph next, so don't let that
4325 % glue accumulate. (Not a breakpoint because it's preceded by a
4326 % discardable item.)
4329 % This \nobreak is purely so the last item on the list is a \penalty
4330 % of 10000. This is so other code, for instance \parsebodycommon, can
4331 % check for and avoid allowing breakpoints. Otherwise, it would
4332 % insert a valid breakpoint between:
4333 % @section sec-whatever
4334 % @deffn def-whatever
4340 % Table of contents.
4343 % Write an entry to the toc file, opening it if necessary.
4344 % Called from @chapter, etc.
4346 % Example usage: \writetocentry{sec}{Section Name}{\the\chapno.\the\secno}
4347 % We append the current node name (if any) and page number as additional
4348 % arguments for the \{chap,sec,...}entry macros which will eventually
4349 % read this. The node name is used in the pdf outlines as the
4350 % destination to jump to.
4352 % We open the .toc file for writing here instead of at @setfilename (or
4353 % any other fixed time) so that @contents can be anywhere in the document.
4354 % But if #1 is `omit', then we don't do anything. This is used for the
4355 % table of contents chapter openings themselves.
4357 \newif\iftocfileopened
4358 \def\omitkeyword{omit}%
4360 \def\writetocentry#1#2#3{%
4361 \edef\writetoctype{#1}%
4362 \ifx\writetoctype\omitkeyword \else
4363 \iftocfileopened\else
4364 \immediate\openout\tocfile = \jobname.toc
4365 \global\tocfileopenedtrue
4370 \toks2 = \expandafter{\lastnode}%
4371 \edef\temp{\write\tocfile{\realbackslash #1entry{\the\toks0}{#3}%
4372 {\the\toks2}{\noexpand\folio}}}%
4377 % Tell \shipout to create a pdf destination on each page, if we're
4378 % writing pdf. These are used in the table of contents. We can't
4379 % just write one on every page because the title pages are numbered
4380 % 1 and 2 (the page numbers aren't printed), and so are the first
4381 % two pages of the document. Thus, we'd have two destinations named
4382 % `1', and two named `2'.
4383 \ifpdf \global\pdfmakepagedesttrue \fi
4386 \newskip\contentsrightmargin \contentsrightmargin=1in
4387 \newcount\savepageno
4388 \newcount\lastnegativepageno \lastnegativepageno = -1
4390 % Prepare to read what we've written to \tocfile.
4392 \def\startcontents#1{%
4393 % If @setchapternewpage on, and @headings double, the contents should
4394 % start on an odd page, unlike chapters. Thus, we maintain
4395 % \contentsalignmacro in parallel with \pagealignmacro.
4396 % From: Torbjorn Granlund <tege@matematik.su.se>
4398 \immediate\closeout\tocfile
4400 % Don't need to put `Contents' or `Short Contents' in the headline.
4401 % It is abundantly clear what they are.
4403 \chapmacro{#1}{Yomitfromtoc}{}%
4405 \savepageno = \pageno
4406 \begingroup % Set up to handle contents files properly.
4407 \catcode`\\=0 \catcode`\{=1 \catcode`\}=2 \catcode`\@=11
4408 % We can't do this, because then an actual ^ in a section
4409 % title fails, e.g., @chapter ^ -- exponentiation. --karl, 9jul97.
4410 %\catcode`\^=7 % to see ^^e4 as \"a etc. juha@piuha.ydi.vtt.fi
4411 \raggedbottom % Worry more about breakpoints than the bottom.
4412 \advance\hsize by -\contentsrightmargin % Don't use the full line length.
4414 % Roman numerals for page numbers.
4415 \ifnum \pageno>0 \global\pageno = \lastnegativepageno \fi
4419 % Normal (long) toc.
4421 \startcontents{\putwordTOC}%
4422 \openin 1 \jobname.toc
4427 \contentsalignmacro % in case @setchapternewpage odd is in effect
4433 \lastnegativepageno = \pageno
4434 \global\pageno = \savepageno
4437 % And just the chapters.
4438 \def\summarycontents{%
4439 \startcontents{\putwordShortTOC}%
4441 \let\numchapentry = \shortchapentry
4442 \let\appentry = \shortchapentry
4443 \let\unnchapentry = \shortunnchapentry
4444 % We want a true roman here for the page numbers.
4446 \let\rm=\shortcontrm \let\bf=\shortcontbf
4447 \let\sl=\shortcontsl \let\tt=\shortconttt
4449 \hyphenpenalty = 10000
4450 \advance\baselineskip by 1pt % Open it up a little.
4451 \def\numsecentry##1##2##3##4{}
4452 \let\appsecentry = \numsecentry
4453 \let\unnsecentry = \numsecentry
4454 \let\numsubsecentry = \numsecentry
4455 \let\appsubsecentry = \numsecentry
4456 \let\unnsubsecentry = \numsecentry
4457 \let\numsubsubsecentry = \numsecentry
4458 \let\appsubsubsecentry = \numsecentry
4459 \let\unnsubsubsecentry = \numsecentry
4460 \openin 1 \jobname.toc
4466 \contentsalignmacro % in case @setchapternewpage odd is in effect
4468 \lastnegativepageno = \pageno
4469 \global\pageno = \savepageno
4471 \let\shortcontents = \summarycontents
4473 % Typeset the label for a chapter or appendix for the short contents.
4474 % The arg is, e.g., `A' for an appendix, or `3' for a chapter.
4476 \def\shortchaplabel#1{%
4477 % This space should be enough, since a single number is .5em, and the
4478 % widest letter (M) is 1em, at least in the Computer Modern fonts.
4479 % But use \hss just in case.
4480 % (This space doesn't include the extra space that gets added after
4481 % the label; that gets put in by \shortchapentry above.)
4483 % We'd like to right-justify chapter numbers, but that looks strange
4484 % with appendix letters. And right-justifying numbers and
4485 % left-justifying letters looks strange when there is less than 10
4486 % chapters. Have to read the whole toc once to know how many chapters
4487 % there are before deciding ...
4488 \hbox to 1em{#1\hss}%
4491 % These macros generate individual entries in the table of contents.
4492 % The first argument is the chapter or section name.
4493 % The last argument is the page number.
4494 % The arguments in between are the chapter number, section number, ...
4496 % Chapters, in the main contents.
4497 \def\numchapentry#1#2#3#4{\dochapentry{#2\labelspace#1}{#4}}
4499 % Chapters, in the short toc.
4500 % See comments in \dochapentry re vbox and related settings.
4501 \def\shortchapentry#1#2#3#4{%
4502 \tocentry{\shortchaplabel{#2}\labelspace #1}{\doshortpageno\bgroup#4\egroup}%
4505 % Appendices, in the main contents.
4506 % Need the word Appendix, and a fixed-size box.
4508 \def\appendixbox#1{%
4509 % We use M since it's probably the widest letter.
4510 \setbox0 = \hbox{\putwordAppendix{} M}%
4511 \hbox to \wd0{\putwordAppendix{} #1\hss}}
4513 \def\appentry#1#2#3#4{\dochapentry{\appendixbox{#2}\labelspace#1}{#4}}
4515 % Unnumbered chapters.
4516 \def\unnchapentry#1#2#3#4{\dochapentry{#1}{#4}}
4517 \def\shortunnchapentry#1#2#3#4{\tocentry{#1}{\doshortpageno\bgroup#4\egroup}}
4520 \def\numsecentry#1#2#3#4{\dosecentry{#2\labelspace#1}{#4}}
4521 \let\appsecentry=\numsecentry
4522 \def\unnsecentry#1#2#3#4{\dosecentry{#1}{#4}}
4525 \def\numsubsecentry#1#2#3#4{\dosubsecentry{#2\labelspace#1}{#4}}
4526 \let\appsubsecentry=\numsubsecentry
4527 \def\unnsubsecentry#1#2#3#4{\dosubsecentry{#1}{#4}}
4529 % And subsubsections.
4530 \def\numsubsubsecentry#1#2#3#4{\dosubsubsecentry{#2\labelspace#1}{#4}}
4531 \let\appsubsubsecentry=\numsubsubsecentry
4532 \def\unnsubsubsecentry#1#2#3#4{\dosubsubsecentry{#1}{#4}}
4534 % This parameter controls the indentation of the various levels.
4535 % Same as \defaultparindent.
4536 \newdimen\tocindent \tocindent = 15pt
4538 % Now for the actual typesetting. In all these, #1 is the text and #2 is the
4541 % If the toc has to be broken over pages, we want it to be at chapters
4542 % if at all possible; hence the \penalty.
4543 \def\dochapentry#1#2{%
4544 \penalty-300 \vskip1\baselineskip plus.33\baselineskip minus.25\baselineskip
4547 \tocentry{#1}{\dopageno\bgroup#2\egroup}%
4549 \nobreak\vskip .25\baselineskip plus.1\baselineskip
4552 \def\dosecentry#1#2{\begingroup
4553 \secentryfonts \leftskip=\tocindent
4554 \tocentry{#1}{\dopageno\bgroup#2\egroup}%
4557 \def\dosubsecentry#1#2{\begingroup
4558 \subsecentryfonts \leftskip=2\tocindent
4559 \tocentry{#1}{\dopageno\bgroup#2\egroup}%
4562 \def\dosubsubsecentry#1#2{\begingroup
4563 \subsubsecentryfonts \leftskip=3\tocindent
4564 \tocentry{#1}{\dopageno\bgroup#2\egroup}%
4567 % We use the same \entry macro as for the index entries.
4568 \let\tocentry = \entry
4570 % Space between chapter (or whatever) number and the title.
4571 \def\labelspace{\hskip1em \relax}
4573 \def\dopageno#1{{\rm #1}}
4574 \def\doshortpageno#1{{\rm #1}}
4576 \def\chapentryfonts{\secfonts \rm}
4577 \def\secentryfonts{\textfonts}
4578 \def\subsecentryfonts{\textfonts}
4579 \def\subsubsecentryfonts{\textfonts}
4582 \message{environments,}
4583 % @foo ... @end foo.
4585 % @point{}, @result{}, @expansion{}, @print{}, @equiv{}.
4587 % Since these characters are used in examples, it should be an even number of
4588 % \tt widths. Each \tt character is 1en, so two makes it 1em.
4591 \def\result{\leavevmode\raise.15ex\hbox to 1em{\hfil$\Rightarrow$\hfil}}
4592 \def\expansion{\leavevmode\raise.1ex\hbox to 1em{\hfil$\mapsto$\hfil}}
4593 \def\print{\leavevmode\lower.1ex\hbox to 1em{\hfil$\dashv$\hfil}}
4594 \def\equiv{\leavevmode\lower.1ex\hbox to 1em{\hfil$\ptexequiv$\hfil}}
4596 % The @error{} command.
4597 % Adapted from the TeXbook's \boxit.
4601 {\tentt \global\dimen0 = 3em}% Width of the box.
4602 \dimen2 = .55pt % Thickness of rules
4603 % The text. (`r' is open on the right, `e' somewhat less so on the left.)
4604 \setbox0 = \hbox{\kern-.75pt \tensf error\kern-1.5pt}
4606 \setbox\errorbox=\hbox to \dimen0{\hfil
4607 \hsize = \dimen0 \advance\hsize by -5.8pt % Space to left+right.
4608 \advance\hsize by -2\dimen2 % Rules.
4610 \hrule height\dimen2
4611 \hbox{\vrule width\dimen2 \kern3pt % Space to left of text.
4612 \vtop{\kern2.4pt \box0 \kern2.4pt}% Space above/below.
4613 \kern3pt\vrule width\dimen2}% Space to right.
4614 \hrule height\dimen2}
4617 \def\error{\leavevmode\lower.7ex\copy\errorbox}
4619 % @tex ... @end tex escapes into raw Tex temporarily.
4620 % One exception: @ is still an escape character, so that @end tex works.
4621 % But \@ or @@ will get a plain tex @ character.
4624 \catcode `\\=0 \catcode `\{=1 \catcode `\}=2
4625 \catcode `\$=3 \catcode `\&=4 \catcode `\#=6
4626 \catcode `\^=7 \catcode `\_=8 \catcode `\~=\active \let~=\tie
4636 \let\bullet=\ptexbullet
4641 \let\equiv=\ptexequiv
4644 \let\indent=\ptexindent
4645 \let\noindent=\ptexnoindent
4653 \def\endldots{\mathinner{\ldots\ldots\ldots\ldots}}%
4654 \def\enddots{\relax\ifmmode\endldots\else$\mathsurround=0pt \endldots\,$\fi}%
4657 % There is no need to define \Etex.
4659 % Define @lisp ... @end lisp.
4660 % @lisp environment forms a group so it can rebind things,
4661 % including the definition of @end lisp (which normally is erroneous).
4663 % Amount to narrow the margins by for @lisp.
4664 \newskip\lispnarrowing \lispnarrowing=0.4in
4666 % This is the definition that ^^M gets inside @lisp, @example, and other
4667 % such environments. \null is better than a space, since it doesn't
4669 \def\lisppar{\null\endgraf}
4671 % This space is always present above and below environments.
4672 \newskip\envskipamount \envskipamount = 0pt
4674 % Make spacing and below environment symmetrical. We use \parskip here
4675 % to help in doing that, since in @example-like environments \parskip
4676 % is reset to zero; thus the \afterenvbreak inserts no space -- but the
4677 % start of the next paragraph will insert \parskip.
4679 \def\aboveenvbreak{{%
4680 % =10000 instead of <10000 because of a special case in \itemzzz, q.v.
4681 \ifnum \lastpenalty=10000 \else
4682 \advance\envskipamount by \parskip
4684 \ifdim\lastskip<\envskipamount
4686 % it's not a good place to break if the last penalty was \nobreak
4688 \ifnum\lastpenalty<10000 \penalty-50 \fi
4689 \vskip\envskipamount
4694 \let\afterenvbreak = \aboveenvbreak
4696 % \nonarrowing is a flag. If "set", @lisp etc don't narrow margins.
4697 \let\nonarrowing=\relax
4699 % @cartouche ... @end cartouche: draw rectangle w/rounded corners around
4700 % environment contents.
4701 \font\circle=lcircle10
4703 \newdimen\cartouter\newdimen\cartinner
4704 \newskip\normbskip\newskip\normpskip\newskip\normlskip
4705 \circthick=\fontdimen8\circle
4707 \def\ctl{{\circle\char'013\hskip -6pt}}% 6pt from pl file: 1/2charwidth
4708 \def\ctr{{\hskip 6pt\circle\char'010}}
4709 \def\cbl{{\circle\char'012\hskip -6pt}}
4710 \def\cbr{{\hskip 6pt\circle\char'011}}
4711 \def\carttop{\hbox to \cartouter{\hskip\lskip
4712 \ctl\leaders\hrule height\circthick\hfil\ctr
4714 \def\cartbot{\hbox to \cartouter{\hskip\lskip
4715 \cbl\leaders\hrule height\circthick\hfil\cbr
4718 \newskip\lskip\newskip\rskip
4721 \ifhmode\par\fi % can't be in the midst of a paragraph.
4723 \lskip=\leftskip \rskip=\rightskip
4724 \leftskip=0pt\rightskip=0pt % we want these *outside*.
4725 \cartinner=\hsize \advance\cartinner by-\lskip
4726 \advance\cartinner by-\rskip
4728 \advance\cartouter by 18.4pt % allow for 3pt kerns on either
4729 % side, and for 6pt waste from
4730 % each corner char, and rule thickness
4731 \normbskip=\baselineskip \normpskip=\parskip \normlskip=\lineskip
4732 % Flag to tell @lisp, etc., not to narrow margin.
4733 \let\nonarrowing=\comment
4735 \baselineskip=0pt\parskip=0pt\lineskip=0pt
4743 \baselineskip=\normbskip
4744 \lineskip=\normlskip
4747 \comment % For explanation, see the end of \def\group.
4762 % This macro is called at the beginning of all the @example variants,
4766 \hfuzz = 12pt % Don't be fussy
4767 \sepspaces % Make spaces be word-separators rather than space tokens.
4768 \let\par = \lisppar % don't ignore blank lines
4769 \obeylines % each line of input is a line of output
4772 \emergencystretch = 0pt % don't try to avoid overfull boxes
4773 % @cartouche defines \nonarrowing to inhibit narrowing
4774 % at next level down.
4775 \ifx\nonarrowing\relax
4776 \advance \leftskip by \lispnarrowing
4777 \exdentamount=\lispnarrowing
4779 \let\exdent=\nofillexdent
4782 % If you want all examples etc. small: @set dispenvsize small.
4783 % If you want even small examples the full size: @set dispenvsize nosmall.
4784 % This affects the following displayed environments:
4785 % @example, @display, @format, @lisp
4787 \def\smallword{small}
4788 \def\nosmallword{nosmall}
4789 \let\SETdispenvsize\relax
4790 \def\setnormaldispenv{%
4791 \ifx\SETdispenvsize\smallword
4792 \smallexamplefonts \rm
4795 \def\setsmalldispenv{%
4796 \ifx\SETdispenvsize\nosmallword
4798 \smallexamplefonts \rm
4802 % We often define two environments, @foo and @smallfoo.
4803 % Let's do it by one command:
4804 \def\makedispenv #1#2{
4805 \expandafter\envdef\csname#1\endcsname {\setnormaldispenv #2}
4806 \expandafter\envdef\csname small#1\endcsname {\setsmalldispenv #2}
4807 \expandafter\let\csname E#1\endcsname \afterenvbreak
4808 \expandafter\let\csname Esmall#1\endcsname \afterenvbreak
4811 % Define two synonyms:
4812 \def\maketwodispenvs #1#2#3{
4813 \makedispenv{#1}{#3}
4814 \makedispenv{#2}{#3}
4817 % @lisp: indented, narrowed, typewriter font; @example: same as @lisp.
4819 % @smallexample and @smalllisp: use smaller fonts.
4820 % Originally contributed by Pavel@xerox.
4822 \maketwodispenvs {lisp}{example}{%
4825 \let\kbdfont = \kbdexamplefont % Allow @kbd to do something special.
4826 \gobble % eat return
4829 % @display/@smalldisplay: same as @lisp except keep current font.
4831 \makedispenv {display}{%
4836 % @format/@smallformat: same as @display except don't narrow margins.
4838 \makedispenv{format}{%
4839 \let\nonarrowing = t%
4844 % @flushleft: same as @format, but doesn't obey \SETdispenvsize.
4846 \let\nonarrowing = t%
4850 \let\Eflushleft = \afterenvbreak
4854 \envdef\flushright{%
4855 \let\nonarrowing = t%
4857 \advance\leftskip by 0pt plus 1fill
4860 \let\Eflushright = \afterenvbreak
4863 % @quotation does normal linebreaking (hence we can't use \nonfillstart)
4864 % and narrows the margins. We keep \parskip nonzero in general, since
4865 % we're doing normal filling. So, when using \aboveenvbreak and
4866 % \afterenvbreak, temporarily make \parskip 0.
4869 {\parskip=0pt \aboveenvbreak}% because \aboveenvbreak inserts \parskip
4872 % @cartouche defines \nonarrowing to inhibit narrowing at next level down.
4873 \ifx\nonarrowing\relax
4874 \advance\leftskip by \lispnarrowing
4875 \advance\rightskip by \lispnarrowing
4876 \exdentamount = \lispnarrowing
4877 \let\nonarrowing = \relax
4879 \parsearg\quotationlabel
4882 % We have retained a nonzero parskip for the environment, since we're
4883 % doing normal filling.
4887 \ifx\quotationauthor\undefined\else
4889 \leftline{\kern 2\leftskip \sl ---\quotationauthor}%
4891 {\parskip=0pt \afterenvbreak}%
4894 % If we're given an argument, typeset it in bold with a colon after.
4895 \def\quotationlabel#1{%
4897 \ifx\temp\empty \else
4903 % LaTeX-like @verbatim...@end verbatim and @verb{<char>...<char>}
4904 % If we want to allow any <char> as delimiter,
4905 % we need the curly braces so that makeinfo sees the @verb command, eg:
4906 % `@verbx...x' would look like the '@verbx' command. --janneke@gnu.org
4908 % [Knuth]: Donald Ervin Knuth, 1996. The TeXbook.
4910 % [Knuth] p.344; only we need to do the other characters Texinfo sets
4911 % active too. Otherwise, they get lost as the first character on a
4914 \do\ \do\\\do\{\do\}\do\$\do\&%
4915 \do\#\do\^\do\^^K\do\_\do\^^A\do\%\do\~%
4916 \do\<\do\>\do\|\do\@\do+\do\"%
4920 \def\uncatcodespecials{%
4921 \def\do##1{\catcode`##1=\other}\dospecials}
4923 % [Knuth] pp. 380,381,391
4924 % Disable Spanish ligatures ?` and !` of \tt font
4926 \catcode`\`=\active\gdef`{\relax\lq}
4929 % Setup for the @verb command.
4931 % Eight spaces for a tab
4933 \catcode`\^^I=\active
4934 \gdef\tabeightspaces{\catcode`\^^I=\active\def^^I{\ \ \ \ \ \ \ \ }}
4938 \tt % easiest (and conventionally used) font for verbatim
4939 \def\par{\leavevmode\endgraf}%
4942 % Respect line breaks,
4943 % print special symbols as themselves, and
4944 % make each space count
4945 % must do in this order:
4946 \obeylines \uncatcodespecials \sepspaces
4949 % Setup for the @verbatim environment
4951 % Real tab expansion
4952 \newdimen\tabw \setbox0=\hbox{\tt\space} \tabw=8\wd0 % tab amount
4954 \def\starttabbox{\setbox0=\hbox\bgroup}
4956 \catcode`\^^I=\active
4958 \catcode`\^^I=\active
4959 \def^^I{\leavevmode\egroup
4960 \dimen0=\wd0 % the width so far, or since the previous tab
4961 \divide\dimen0 by\tabw
4962 \multiply\dimen0 by\tabw % compute previous multiple of \tabw
4963 \advance\dimen0 by\tabw % advance to next multiple of \tabw
4964 \wd0=\dimen0 \box0 \starttabbox
4968 \def\setupverbatim{%
4970 \advance\leftskip by -\defbodyindent
4971 % Easiest (and conventionally used) font for verbatim
4973 \def\par{\leavevmode\egroup\box0\endgraf}%
4976 % Respect line breaks,
4977 % print special symbols as themselves, and
4978 % make each space count
4979 % must do in this order:
4980 \obeylines \uncatcodespecials \sepspaces
4981 \everypar{\starttabbox}%
4984 % Do the @verb magic: verbatim text is quoted by unique
4985 % delimiter characters. Before first delimiter expect a
4986 % right brace, after last delimiter expect closing brace:
4988 % \def\doverb'{'<char>#1<char>'}'{#1}
4990 % [Knuth] p. 382; only eat outer {}
4992 \catcode`[=1\catcode`]=2\catcode`\{=\other\catcode`\}=\other
4993 \gdef\doverb{#1[\def\next##1#1}[##1\endgroup]\next]
4996 \def\verb{\begingroup\setupverb\doverb}
4999 % Do the @verbatim magic: define the macro \doverbatim so that
5000 % the (first) argument ends when '@end verbatim' is reached, ie:
5002 % \def\doverbatim#1@end verbatim{#1}
5004 % For Texinfo it's a lot easier than for LaTeX,
5005 % because texinfo's \verbatim doesn't stop at '\end{verbatim}':
5006 % we need not redefine '\', '{' and '}'.
5008 % Inspired by LaTeX's verbatim command set [latex.ltx]
5013 % ignore everything up to the first ^^M, that's the newline at the end
5014 % of the @verbatim input line itself. Otherwise we get an extra blank
5015 % line in the output.
5016 \xdef\doverbatim#1^^M#2@end verbatim{#2\noexpand\end\gobble verbatim}%
5017 % We really want {...\end verbatim} in the body of the macro, but
5018 % without the active space; thus we have to use \xdef and \gobble.
5022 \setupverbatim\doverbatim
5024 \let\Everbatim = \afterenvbreak
5027 % @verbatiminclude FILE - insert text of file in verbatim environment.
5029 \def\verbatiminclude{\parseargusing\filenamecatcodes\doverbatiminclude}
5031 \def\doverbatiminclude#1{%
5033 \makevalueexpandable
5040 % @copying ... @end copying.
5041 % Save the text away for @insertcopying later. Many commands won't be
5042 % allowed in this context, but that's ok.
5044 % We save the uninterpreted tokens, rather than creating a box.
5045 % Saving the text in a box would be much easier, but then all the
5046 % typesetting commands (@smallbook, font changes, etc.) have to be done
5047 % beforehand -- and a) we want @copying to be done first in the source
5048 % file; b) letting users define the frontmatter in as flexible order as
5049 % possible is very desirable.
5051 \def\copying{\begingroup
5052 % Define a command to swallow text until we reach `@end copying'.
5053 % \ is the escape char in this texinfo.tex file, so it is the
5054 % delimiter for the command; @ will be the escape char when we read
5055 % it, but that doesn't matter.
5056 \long\def\docopying##1\end copying{\gdef\copyingtext{##1}\enddocopying}%
5058 % We must preserve ^^M's in the input file; see \insertcopying below.
5059 \catcode`\^^M = \active
5063 % What we do to finish off the copying text.
5065 \def\enddocopying{\endgroup\ignorespaces}
5067 % @insertcopying. Here we must play games with ^^M's. On the one hand,
5068 % we need them to delimit commands such as `@end quotation', so they
5069 % must be active. On the other hand, we certainly don't want every
5070 % end-of-line to be a \par, as would happen with the normal active
5071 % definition of ^^M. On the third hand, two ^^M's in a row should still
5074 % Our approach is to make ^^M insert a space and a penalty1 normally;
5075 % then it can also check if \lastpenalty=1. If it does, then manually
5078 % This messes up the normal definitions of @c[omment], so we redefine
5079 % it. Similarly for @ignore. (These commands are used in the gcc
5080 % manual for man page generation.)
5082 % Seems pretty fragile, most line-oriented commands will presumably
5083 % fail, but for the limited use of getting the copying text (which
5084 % should be quite simple) inserted, we can hope it's ok.
5086 {\catcode`\^^M=\active %
5087 \gdef\insertcopying{\begingroup %
5088 \parindent = 0pt % looks wrong on title page
5090 \ifnum \lastpenalty=1 %
5097 % Fix @c[omment] for catcode 13 ^^M's.
5098 \def\c##1^^M{\ignorespaces}%
5101 % Don't bother jumping through all the hoops that \doignore does, it
5102 % would be very hard since the catcodes are already set.
5103 \long\def\ignore##1\end ignore{\ignorespaces}%
5112 \newskip\defbodyindent \defbodyindent=.4in
5113 \newskip\defargsindent \defargsindent=50pt
5114 \newskip\deflastargmargin \deflastargmargin=18pt
5116 % Start the processing of @deffn:
5118 \ifnum\lastpenalty<10000
5121 % If there are two @def commands in a row, we'll have a \nobreak,
5122 % which is there to keep the function description together with its
5123 % header. But if there's nothing but headers, we need to allow a
5124 % break somewhere. Check for penalty 10002 (inserted by
5125 % \defargscommonending) instead of 10000, since the sectioning
5126 % commands insert a \penalty10000, and we don't want to allow a break
5127 % between a section heading and a defun.
5128 \ifnum\lastpenalty=10002 \penalty2000 \fi
5130 % Similarly, after a section heading, do not allow a break.
5131 % But do insert the glue.
5132 \medskip % preceded by discardable penalty, so not a breakpoint
5136 \advance\leftskip by \defbodyindent
5137 \exdentamount=\defbodyindent
5141 % First, check whether we are in the right environment:
5144 % As above, allow line break if we have multiple x headers in a row.
5145 % It's not a great place, though.
5146 \ifnum\lastpenalty=10002 \penalty3000 \fi
5148 % And now, it's time to reuse the body of the original defun:
5149 \expandafter\gobbledefun#1%
5151 \def\gobbledefun#1\startdefun{}
5153 % \printdefunline \deffnheader{text}
5155 \def\printdefunline#1#2{%
5157 % call \deffnheader:
5160 \interlinepenalty = 10000
5161 \advance\rightskip by 0pt plus 1fil
5163 \nobreak\vskip -\parskip
5164 \penalty 10002 % signal to \startdefun and \dodefunx
5165 % Some of the @defun-type tags do not enable magic parentheses,
5166 % rendering the following check redundant. But we don't optimize.
5171 \def\Edefun{\endgraf\medbreak}
5173 % \makedefun{deffn} creates \deffn, \deffnx and \Edeffn;
5174 % the only thing remainnig is to define \deffnheader.
5177 \expandafter\let\csname E#1\endcsname = \Edefun
5178 \edef\temp{\noexpand\domakedefun
5179 \makecsname{#1}\makecsname{#1x}\makecsname{#1header}}%
5183 % \domakedefun \deffn \deffnx \deffnheader
5185 % Define \deffn and \deffnx, without parameters.
5186 % \deffnheader has to be defined explicitly.
5188 \def\domakedefun#1#2#3{%
5191 \parseargusing\activeparens{\printdefunline#3}%
5193 \def#2{\dodefunx#1}%
5197 %%% Untyped functions:
5199 % @deffn category name args
5200 \makedefun{deffn}{\deffngeneral{}}
5202 % @deffn category class name args
5203 \makedefun{defop}#1 {\defopon{#1\ \putwordon}}
5205 % \defopon {category on}class name args
5206 \def\defopon#1#2 {\deffngeneral{\putwordon\ \code{#2}}{#1\ \code{#2}} }
5208 % \deffngeneral {subind}category name args
5210 \def\deffngeneral#1#2 #3 #4\endheader{%
5211 % Remember that \dosubind{fn}{foo}{} is equivalent to \doind{fn}{foo}.
5212 \dosubind{fn}{\code{#3}}{#1}%
5213 \defname{#2}{}{#3}\magicamp\defunargs{#4\unskip}%
5216 %%% Typed functions:
5218 % @deftypefn category type name args
5219 \makedefun{deftypefn}{\deftypefngeneral{}}
5221 % @deftypeop category class type name args
5222 \makedefun{deftypeop}#1 {\deftypeopon{#1\ \putwordon}}
5224 % \deftypeopon {category on}class type name args
5225 \def\deftypeopon#1#2 {\deftypefngeneral{\putwordon\ \code{#2}}{#1\ \code{#2}} }
5227 % \deftypefngeneral {subind}category type name args
5229 \def\deftypefngeneral#1#2 #3 #4 #5\endheader{%
5230 \dosubind{fn}{\code{#4}}{#1}%
5231 \defname{#2}{#3}{#4}\defunargs{#5\unskip}%
5234 %%% Typed variables:
5236 % @deftypevr category type var args
5237 \makedefun{deftypevr}{\deftypecvgeneral{}}
5239 % @deftypecv category class type var args
5240 \makedefun{deftypecv}#1 {\deftypecvof{#1\ \putwordof}}
5242 % \deftypecvof {category of}class type var args
5243 \def\deftypecvof#1#2 {\deftypecvgeneral{\putwordof\ \code{#2}}{#1\ \code{#2}} }
5245 % \deftypecvgeneral {subind}category type var args
5247 \def\deftypecvgeneral#1#2 #3 #4 #5\endheader{%
5248 \dosubind{vr}{\code{#4}}{#1}%
5249 \defname{#2}{#3}{#4}\defunargs{#5\unskip}%
5252 %%% Untyped variables:
5254 % @defvr category var args
5255 \makedefun{defvr}#1 {\deftypevrheader{#1} {} }
5257 % @defcv category class var args
5258 \makedefun{defcv}#1 {\defcvof{#1\ \putwordof}}
5260 % \defcvof {category of}class var args
5261 \def\defcvof#1#2 {\deftypecvof{#1}#2 {} }
5264 % @deftp category name args
5265 \makedefun{deftp}#1 #2 #3\endheader{%
5266 \doind{tp}{\code{#2}}%
5267 \defname{#1}{}{#2}\defunargs{#3\unskip}%
5270 % Remaining @defun-like shortcuts:
5271 \makedefun{defun}{\deffnheader{\putwordDeffunc} }
5272 \makedefun{defmac}{\deffnheader{\putwordDefmac} }
5273 \makedefun{defspec}{\deffnheader{\putwordDefspec} }
5274 \makedefun{deftypefun}{\deftypefnheader{\putwordDeffunc} }
5275 \makedefun{defvar}{\defvrheader{\putwordDefvar} }
5276 \makedefun{defopt}{\defvrheader{\putwordDefopt} }
5277 \makedefun{deftypevar}{\deftypevrheader{\putwordDefvar} }
5278 \makedefun{defmethod}{\defopon\putwordMethodon}
5279 \makedefun{deftypemethod}{\deftypeopon\putwordMethodon}
5280 \makedefun{defivar}{\defcvof\putwordInstanceVariableof}
5281 \makedefun{deftypeivar}{\deftypecvof\putwordInstanceVariableof}
5283 % \defname, which formats the name of the @def (not the args).
5284 % #1 is the category, such as "Function".
5285 % #2 is the return type, if any.
5286 % #3 is the function name.
5288 % We are followed by (but not passed) the arguments, if any.
5290 \def\defname#1#2#3{%
5291 % Get the values of \leftskip and \rightskip as they were outside the @def...
5292 \advance\leftskip by -\defbodyindent
5294 % How we'll format the type name. Putting it in brackets helps
5295 % distinguish it from the body text that may end up on the next line
5298 \setbox0=\hbox{\kern\deflastargmargin \ifx\temp\empty\else [\rm\temp]\fi}
5300 % Figure out line sizes for the paragraph shape.
5301 % The first line needs space for \box0; but if \rightskip is nonzero,
5302 % we need only space for the part of \box0 which exceeds it:
5303 \dimen0=\hsize \advance\dimen0 by -\wd0 \advance\dimen0 by \rightskip
5304 % The continuations:
5305 \dimen2=\hsize \advance\dimen2 by -\defargsindent
5306 % (plain.tex says that \dimen1 should be used only as global.)
5307 \parshape 2 0in \dimen0 \defargsindent \dimen2
5309 % Put the type name to the right margin.
5312 \hfil\box0 \kern-\hsize
5313 % \hsize has to be shortened this way:
5315 % Intentionally do not respect \rightskip, since we need the space.
5318 % Allow all lines to be underfull without complaint:
5319 \tolerance=10000 \hbadness=10000
5320 \exdentamount=\defbodyindent
5322 % defun fonts. We use typewriter by default (used to be bold) because:
5323 % . we're printing identifiers, they should be in tt in principle.
5324 % . in languages with many accents, such as Czech or French, it's
5325 % common to leave accents off identifiers. The result looks ok in
5326 % tt, but exceedingly strange in rm.
5327 % . we don't want -- and --- to be treated as ligatures.
5328 % . this still does not fix the ?` and !` ligatures, but so far no
5329 % one has made identifiers using them :).
5331 \def\temp{#2}% return value type
5332 \ifx\temp\empty\else \tclose{\temp} \fi
5333 #3% output function name
5335 {\rm\enskip}% hskip 0.5 em of \tenrm
5338 % arguments will be output next, if any.
5341 % Print arguments in slanted roman (not ttsl), inconsistently with using
5342 % tt for the name. This is because literal text is sometimes needed in
5343 % the argument list (groff manual), and ttsl and tt are not very
5344 % distinguishable. Prevent hyphenation at `-' chars.
5347 % use sl by default (not ttsl),
5349 \df \sl \hyphenchar\font=0
5351 % On the other hand, if an argument has two dashes (for instance), we
5352 % want a way to get ttsl. Let's try @var for that.
5355 \sl\hyphenchar\font=45
5358 % We want ()&[] to print specially on the defun line.
5361 \catcode`\(=\active \catcode`\)=\active
5362 \catcode`\[=\active \catcode`\]=\active
5366 % Make control sequences which act like normal parenthesis chars.
5367 \let\lparen = ( \let\rparen = )
5369 % Be sure that we always have a definition for `(', etc. For example,
5370 % if the fn name has parens in it, \boldbrax will not be in effect yet,
5371 % so TeX would otherwise complain about undefined control sequence.
5374 \global\let(=\lparen \global\let)=\rparen
5375 \global\let[=\lbrack \global\let]=\rbrack
5378 \gdef\boldbrax{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb}
5379 \gdef\magicamp{\let&=\amprm}
5382 \newcount\parencount
5384 % If we encounter &foo, then turn on ()-hacking afterwards
5386 \def\amprm#1 {\ampseentrue{\bf\ }}
5390 % At the first level, print parens in roman,
5391 % otherwise use the default font.
5392 \ifnum \parencount=1 \rm \fi
5394 % The \sf parens (in \boldbrax) actually are a little bolder than
5395 % the contained text. This is especially needed for [ and ] .
5399 \def\infirstlevel#1{%
5406 \def\bfafterword#1 {#1 \bf}
5409 \global\advance\parencount by 1
5411 \infirstlevel \bfafterword
5416 \global\advance\parencount by -1
5419 \newcount\brackcount
5421 \global\advance\brackcount by 1
5426 \global\advance\brackcount by -1
5429 \def\checkparencounts{%
5430 \ifnum\parencount=0 \else \badparencount \fi
5431 \ifnum\brackcount=0 \else \badbrackcount \fi
5433 \def\badparencount{%
5434 \errmessage{Unbalanced parentheses in @def}%
5435 \global\parencount=0
5437 \def\badbrackcount{%
5438 \errmessage{Unbalanced square braces in @def}%
5439 \global\brackcount=0
5446 % To do this right we need a feature of e-TeX, \scantokens,
5447 % which we arrange to emulate with a temporary file in ordinary TeX.
5448 \ifx\eTeXversion\undefined
5449 \newwrite\macscribble
5451 \toks0={#1\endinput}%
5452 \immediate\openout\macscribble=\jobname.tmp
5453 \immediate\write\macscribble{\the\toks0}%
5454 \immediate\closeout\macscribble
5462 \let\xeatspaces\eatspaces
5463 % Undo catcode changes of \startcontents and \doprintindex
5464 \catcode`\@=0 \catcode`\\=\other \escapechar=`\@
5468 % Append \endinput to make sure that TeX does not see the ending newline.
5470 % I've verified that it is necessary both for e-TeX and for ordinary TeX
5472 \scantokens{#1\endinput}%
5476 \newcount\paramno % Count of parameters
5477 \newtoks\macname % Macro name
5478 \newif\ifrecursive % Is it recursive?
5479 \def\macrolist{} % List of all defined macros in the form
5480 % \do\macro1\do\macro2...
5483 % This does \let #1 = #2, except with \csnames.
5485 \expandafter\expandafter
5487 \expandafter\expandafter
5489 \csname#2\endcsname}
5491 % Trim leading and trailing spaces off a string.
5492 % Concepts from aro-bend problem 15 (see CTAN).
5494 \gdef\eatspaces #1{\expandafter\trim@\expandafter{#1 }}
5495 \gdef\trim@ #1{\trim@@ @#1 @ #1 @ @@}
5496 \gdef\trim@@ #1@ #2@ #3@@{\trim@@@\empty #2 @}
5498 \unbrace{\gdef\trim@@@ #1 } #2@{#1}
5501 % Trim a single trailing ^^M off a string.
5502 {\catcode`\^^M=\other \catcode`\Q=3%
5503 \gdef\eatcr #1{\eatcra #1Q^^MQ}%
5504 \gdef\eatcra#1^^MQ{\eatcrb#1Q}%
5505 \gdef\eatcrb#1Q#2Q{#1}%
5508 % Macro bodies are absorbed as an argument in a context where
5509 % all characters are catcode 10, 11 or 12, except \ which is active
5510 % (as in normal texinfo). It is necessary to change the definition of \.
5512 % It's necessary to have hard CRs when the macro is executed. This is
5513 % done by making ^^M (\endlinechar) catcode 12 when reading the macro
5514 % body, and then making it the \newlinechar in \scanmacro.
5516 \def\macrobodyctxt{%
5527 \catcode`\^^M=\other
5541 % \mbodybackslash is the definition of \ in @macro bodies.
5542 % It maps \foo\ => \csname macarg.foo\endcsname => #N
5543 % where N is the macro parameter number.
5544 % We define \csname macarg.\endcsname to be \realbackslash, so
5545 % \\ in macro replacement text gets you a backslash.
5547 {\catcode`@=0 @catcode`@\=@active
5548 @gdef@usembodybackslash{@let\=@mbodybackslash}
5549 @gdef@mbodybackslash#1\{@csname macarg.#1@endcsname}
5551 \expandafter\def\csname macarg.\endcsname{\realbackslash}
5553 \def\macro{\recursivefalse\parsearg\macroxxx}
5554 \def\rmacro{\recursivetrue\parsearg\macroxxx}
5557 \getargs{#1}% now \macname is the macname and \argl the arglist
5558 \ifx\argl\empty % no arguments
5561 \expandafter\parsemargdef \argl;%
5563 \if1\csname ismacro.\the\macname\endcsname
5564 \message{Warning: redefining \the\macname}%
5566 \expandafter\ifx\csname \the\macname\endcsname \relax
5567 \else \errmessage{Macro name \the\macname\space already defined}\fi
5568 \global\cslet{macsave.\the\macname}{\the\macname}%
5569 \global\expandafter\let\csname ismacro.\the\macname\endcsname=1%
5570 % Add the macroname to \macrolist
5571 \toks0 = \expandafter{\macrolist\do}%
5572 \xdef\macrolist{\the\toks0
5573 \expandafter\noexpand\csname\the\macname\endcsname}%
5575 \begingroup \macrobodyctxt
5576 \ifrecursive \expandafter\parsermacbody
5577 \else \expandafter\parsemacbody
5580 \parseargdef\unmacro{%
5581 \if1\csname ismacro.#1\endcsname
5582 \global\cslet{#1}{macsave.#1}%
5583 \global\expandafter\let \csname ismacro.#1\endcsname=0%
5584 % Remove the macro name from \macrolist:
5586 \expandafter\let\csname#1\endcsname \relax
5588 \xdef\macrolist{\macrolist}%
5591 \errmessage{Macro #1 not defined}%
5595 % Called by \do from \dounmacro on each macro. The idea is to omit any
5596 % macro definitions that have been changed to \relax.
5602 \noexpand\do \noexpand #1%
5606 % This makes use of the obscure feature that if the last token of a
5607 % <parameter list> is #, then the preceding argument is delimited by
5608 % an opening brace, and that opening brace is not consumed.
5609 \def\getargs#1{\getargsxxx#1{}}
5610 \def\getargsxxx#1#{\getmacname #1 \relax\getmacargs}
5611 \def\getmacname #1 #2\relax{\macname={#1}}
5612 \def\getmacargs#1{\def\argl{#1}}
5614 % Parse the optional {params} list. Set up \paramno and \paramlist
5615 % so \defmacro knows what to do. Define \macarg.blah for each blah
5616 % in the params list, to be ##N where N is the position in that list.
5617 % That gets used by \mbodybackslash (above).
5619 % We need to get `macro parameter char #' into several definitions.
5620 % The technique used is stolen from LaTeX: let \hash be something
5621 % unexpandable, insert that wherever you need a #, and then redefine
5622 % it to # just before using the token list produced.
5624 % The same technique is used to protect \eatspaces till just before
5625 % the macro is used.
5627 \def\parsemargdef#1;{\paramno=0\def\paramlist{}%
5628 \let\hash\relax\let\xeatspaces\relax\parsemargdefxxx#1,;,}
5629 \def\parsemargdefxxx#1,{%
5630 \if#1;\let\next=\relax
5631 \else \let\next=\parsemargdefxxx
5632 \advance\paramno by 1%
5633 \expandafter\edef\csname macarg.\eatspaces{#1}\endcsname
5634 {\xeatspaces{\hash\the\paramno}}%
5635 \edef\paramlist{\paramlist\hash\the\paramno,}%
5638 % These two commands read recursive and nonrecursive macro bodies.
5639 % (They're different since rec and nonrec macros end differently.)
5641 \long\def\parsemacbody#1@end macro%
5642 {\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
5643 \long\def\parsermacbody#1@end rmacro%
5644 {\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
5646 % This defines the macro itself. There are six cases: recursive and
5647 % nonrecursive macros of zero, one, and many arguments.
5648 % Much magic with \expandafter here.
5649 % \xdef is used so that macro definitions will survive the file
5650 % they're defined in; @include reads the file inside a group.
5652 \let\hash=##% convert placeholders to macro parameter chars
5656 \expandafter\xdef\csname\the\macname\endcsname{%
5657 \noexpand\scanmacro{\temp}}%
5659 \expandafter\xdef\csname\the\macname\endcsname{%
5660 \bgroup\noexpand\macroargctxt
5661 \noexpand\braceorline
5662 \expandafter\noexpand\csname\the\macname xxx\endcsname}%
5663 \expandafter\xdef\csname\the\macname xxx\endcsname##1{%
5664 \egroup\noexpand\scanmacro{\temp}}%
5666 \expandafter\xdef\csname\the\macname\endcsname{%
5667 \bgroup\noexpand\macroargctxt
5668 \noexpand\csname\the\macname xx\endcsname}%
5669 \expandafter\xdef\csname\the\macname xx\endcsname##1{%
5670 \expandafter\noexpand\csname\the\macname xxx\endcsname ##1,}%
5671 \expandafter\expandafter
5673 \expandafter\expandafter
5674 \csname\the\macname xxx\endcsname
5675 \paramlist{\egroup\noexpand\scanmacro{\temp}}%
5680 \expandafter\xdef\csname\the\macname\endcsname{%
5681 \noexpand\norecurse{\the\macname}%
5682 \noexpand\scanmacro{\temp}\egroup}%
5684 \expandafter\xdef\csname\the\macname\endcsname{%
5685 \bgroup\noexpand\macroargctxt
5686 \noexpand\braceorline
5687 \expandafter\noexpand\csname\the\macname xxx\endcsname}%
5688 \expandafter\xdef\csname\the\macname xxx\endcsname##1{%
5690 \noexpand\norecurse{\the\macname}%
5691 \noexpand\scanmacro{\temp}\egroup}%
5693 \expandafter\xdef\csname\the\macname\endcsname{%
5694 \bgroup\noexpand\macroargctxt
5695 \expandafter\noexpand\csname\the\macname xx\endcsname}%
5696 \expandafter\xdef\csname\the\macname xx\endcsname##1{%
5697 \expandafter\noexpand\csname\the\macname xxx\endcsname ##1,}%
5698 \expandafter\expandafter
5700 \expandafter\expandafter
5701 \csname\the\macname xxx\endcsname
5704 \noexpand\norecurse{\the\macname}%
5705 \noexpand\scanmacro{\temp}\egroup}%
5709 \def\norecurse#1{\bgroup\cslet{#1}{macsave.#1}}
5711 % \braceorline decides whether the next nonwhitespace character is a
5712 % {. If so it reads up to the closing }, if not, it reads the whole
5713 % line. Whatever was read is then fed to the next control sequence
5714 % as an argument (by \parsebrace or \parsearg)
5715 \def\braceorline#1{\let\next=#1\futurelet\nchar\braceorlinexxx}
5716 \def\braceorlinexxx{%
5717 \ifx\nchar\bgroup\else
5718 \expandafter\parsearg
5721 % We mant to disable all macros during \shipout so that they are not
5722 % expanded by \write.
5723 \def\turnoffmacros{\begingroup \def\do##1{\let\noexpand##1=\relax}%
5724 \edef\next{\macrolist}\expandafter\endgroup\next}
5728 % We need some trickery to remove the optional spaces around the equal
5729 % sign. Just make them active and then expand them all to nothing.
5730 \def\alias{\parseargusing\obeyspaces\aliasxxx}
5731 \def\aliasxxx #1{\aliasyyy#1\relax}
5732 \def\aliasyyy #1=#2\relax{%
5734 \expandafter\let\obeyedspace=\empty
5735 \xdef\next{\global\let\makecsname{#1}=\makecsname{#2}}%
5741 \message{cross references,}
5745 \newif\ifhavexrefs % True if xref values are known.
5746 \newif\ifwarnedxrefs % True if we warned once that they aren't known.
5748 % @inforef is relatively simple.
5749 \def\inforef #1{\inforefzzz #1,,,,**}
5750 \def\inforefzzz #1,#2,#3,#4**{\putwordSee{} \putwordInfo{} \putwordfile{} \file{\ignorespaces #3{}},
5751 node \samp{\ignorespaces#1{}}}
5753 % @node's only job in TeX is to define \lastnode, which is used in
5755 \parseargdef\node{\checkenv{}\nodexxx #1,\finishnodeparse}
5756 \def\nodexxx#1,#2\finishnodeparse{\gdef\lastnode{#1}}
5758 \let\lastnode=\empty
5760 % Write a cross-reference definition for the current node. #1 is the
5761 % type (Ynumbered, Yappendix, Ynothing).
5764 \ifx\lastnode\empty\else
5765 \setref{\lastnode}{#1}%
5766 \global\let\lastnode=\empty
5770 % @anchor{NAME} -- define xref target at arbitrary point.
5772 \newcount\savesfregister
5774 \def\savesf{\relax \ifhmode \savesfregister=\spacefactor \fi}
5775 \def\restoresf{\relax \ifhmode \spacefactor=\savesfregister \fi}
5776 \def\anchor#1{\savesf \setref{#1}{Ynothing}\restoresf \ignorespaces}
5778 % \setref{NAME}{SNT} defines a cross-reference point NAME (a node or an
5779 % anchor), which consists of three parts:
5780 % 1) NAME-title - the current sectioning name taken from \thissection,
5781 % or the anchor name.
5782 % 2) NAME-snt - section number and type, passed as the SNT arg, or
5783 % empty for anchors.
5784 % 3) NAME-pg - the page number.
5786 % This is called from \donoderef, \anchor, and \dofloat. In the case of
5787 % floats, there is an additional part, which is not written here:
5788 % 4) NAME-lof - the text as it should appear in a @listoffloats.
5794 \atdummies % preserve commands, but don't expand them
5797 \edef\writexrdef##1##2{%
5798 \write\auxfile{@xrdef{#1-% #1 of \setref, expanded by the \edef
5799 ##1}{##2}}% these are parameters of \writexrdef
5801 \toks0 = \expandafter{\thissection}%
5802 \immediate \writexrdef{title}{\the\toks0 }%
5803 \immediate \writexrdef{snt}{\csname #2\endcsname}% \Ynumbered etc.
5804 \writexrdef{pg}{\folio}% will be written later, during \shipout
5809 % @xref, @pxref, and @ref generate cross-references. For \xrefX, #1 is
5810 % the node name, #2 the name of the Info cross-reference, #3 the printed
5811 % node name, #4 the name of the Info file, #5 the name of the printed
5812 % manual. All but the node name can be omitted.
5814 \def\pxref#1{\putwordsee{} \xrefX[#1,,,,,,,]}
5815 \def\xref#1{\putwordSee{} \xrefX[#1,,,,,,,]}
5816 \def\ref#1{\xrefX[#1,,,,,,,]}
5817 \def\xrefX[#1,#2,#3,#4,#5,#6]{\begingroup
5819 \def\printedmanual{\ignorespaces #5}%
5820 \def\printedrefname{\ignorespaces #3}%
5821 \setbox1=\hbox{\printedmanual\unskip}%
5822 \setbox0=\hbox{\printedrefname\unskip}%
5824 % No printed node name was explicitly given.
5825 \expandafter\ifx\csname SETxref-automatic-section-title\endcsname\relax
5826 % Use the node name inside the square brackets.
5827 \def\printedrefname{\ignorespaces #1}%
5829 % Use the actual chapter/section title appear inside
5830 % the square brackets. Use the real section title if we have it.
5832 % It is in another manual, so we don't have it.
5833 \def\printedrefname{\ignorespaces #1}%
5836 % We know the real title if we have the xref values.
5837 \def\printedrefname{\refx{#1-title}{}}%
5839 % Otherwise just copy the Info node name.
5840 \def\printedrefname{\ignorespaces #1}%
5846 % Make link in pdf output.
5850 {\turnoffactive \otherbackslash
5851 \ifnum\filenamelength>0
5852 \startlink attr{/Border [0 0 0]}%
5853 goto file{\the\filename.pdf} name{#1}%
5855 \startlink attr{/Border [0 0 0]}%
5856 goto name{\pdfmkpgn{#1}}%
5862 % Float references are printed completely differently: "Figure 1.2"
5863 % instead of "[somenode], p.3". We distinguish them by the
5864 % LABEL-title being set to a magic string.
5866 % Have to otherify everything special to allow the \csname to
5867 % include an _ in the xref name, etc.
5871 \expandafter\global\expandafter\let\expandafter\Xthisreftitle
5872 \csname XR#1-title\endcsname
5874 \iffloat\Xthisreftitle
5875 % If the user specified the print name (third arg) to the ref,
5876 % print it instead of our usual "Figure 1.2".
5883 % if the user also gave the printed manual name (fifth arg), append
5886 \space \putwordin{} \cite{\printedmanual}%
5889 % node/anchor (non-float) references.
5891 % If we use \unhbox0 and \unhbox1 to print the node names, TeX does not
5892 % insert empty discretionaries after hyphens, which means that it will
5893 % not find a line break at a hyphen in a node names. Since some manuals
5894 % are best written with fairly long node names, containing hyphens, this
5895 % is a loss. Therefore, we give the text of the node name again, so it
5896 % is as if TeX is seeing it for the first time.
5898 \putwordsection{} ``\printedrefname'' \putwordin{} \cite{\printedmanual}%
5900 % _ (for example) has to be the character _ for the purposes of the
5901 % control sequence corresponding to the node, but it has to expand
5902 % into the usual \leavevmode...\vrule stuff for purposes of
5903 % printing. So we \turnoffactive for the \refx-snt, back on for the
5904 % printing, back off for the \refx-pg.
5905 {\turnoffactive \otherbackslash
5906 % Only output a following space if the -snt ref is nonempty; for
5907 % @unnumbered and @anchor, it won't be.
5908 \setbox2 = \hbox{\ignorespaces \refx{#1-snt}{}}%
5909 \ifdim \wd2 > 0pt \refx{#1-snt}\space\fi
5911 % output the `[mynode]' via a macro so it can be overridden.
5912 \xrefprintnodename\printedrefname
5914 % But we always want a comma and a space:
5917 % output the `page 3'.
5918 \turnoffactive \otherbackslash \putwordpage\tie\refx{#1-pg}{}%
5924 % This macro is called from \xrefX for the `[nodename]' part of xref
5925 % output. It's a separate macro only so it can be changed more easily,
5926 % since square brackets don't work well in some documents. Particularly
5927 % one that Bob is working on :).
5929 \def\xrefprintnodename#1{[#1]}
5931 % Things referred to by \setref.
5937 \putwordChapter@tie \the\chapno
5938 \else \ifnum\subsecno=0
5939 \putwordSection@tie \the\chapno.\the\secno
5940 \else \ifnum\subsubsecno=0
5941 \putwordSection@tie \the\chapno.\the\secno.\the\subsecno
5943 \putwordSection@tie \the\chapno.\the\secno.\the\subsecno.\the\subsubsecno
5948 \putwordAppendix@tie @char\the\appendixno{}%
5949 \else \ifnum\subsecno=0
5950 \putwordSection@tie @char\the\appendixno.\the\secno
5951 \else \ifnum\subsubsecno=0
5952 \putwordSection@tie @char\the\appendixno.\the\secno.\the\subsecno
5955 @char\the\appendixno.\the\secno.\the\subsecno.\the\subsubsecno
5959 % Define \refx{NAME}{SUFFIX} to reference a cross-reference string named NAME.
5960 % If its value is nonempty, SUFFIX is output afterward.
5966 \expandafter\global\expandafter\let\expandafter\thisrefX
5967 \csname XR#1\endcsname
5970 % If not defined, say something at least.
5971 \angleleft un\-de\-fined\angleright
5974 \message{\linenumber Undefined cross reference `#1'.}%
5977 \global\warnedxrefstrue
5978 \message{Cross reference values unknown; you must run TeX again.}%
5983 % It's defined, so just use it.
5986 #2% Output the suffix in any case.
5989 % This is the macro invoked by entries in the aux file. Usually it's
5990 % just a \def (we prepend XR to the control sequence name to avoid
5991 % collisions). But if this is a float type, we have more work to do.
5994 \expandafter\gdef\csname XR#1\endcsname{#2}% remember this xref value.
5996 % Was that xref control sequence that we just defined for a float?
5997 \expandafter\iffloat\csname XR#1\endcsname
5998 % it was a float, and we have the (safe) float type in \iffloattype.
5999 \expandafter\let\expandafter\floatlist
6000 \csname floatlist\iffloattype\endcsname
6002 % Is this the first time we've seen this float type?
6003 \expandafter\ifx\floatlist\relax
6004 \toks0 = {\do}% yes, so just \do
6006 % had it before, so preserve previous elements in list.
6007 \toks0 = \expandafter{\floatlist\do}%
6010 % Remember this xref in the control sequence \floatlistFLOATTYPE,
6011 % for later use in \listoffloats.
6012 \expandafter\xdef\csname floatlist\iffloattype\endcsname{\the\toks0{#1}}%
6016 % Read the last existing aux file, if any. No error if none exists.
6019 \openin 1 \jobname.aux
6022 \global\havexrefstrue
6027 \def\readauxfile{\begingroup
6028 \catcode`\^^@=\other
6029 \catcode`\^^A=\other
6030 \catcode`\^^B=\other
6031 \catcode`\^^C=\other
6032 \catcode`\^^D=\other
6033 \catcode`\^^E=\other
6034 \catcode`\^^F=\other
6035 \catcode`\^^G=\other
6036 \catcode`\^^H=\other
6037 \catcode`\^^K=\other
6038 \catcode`\^^L=\other
6039 \catcode`\^^N=\other
6040 \catcode`\^^P=\other
6041 \catcode`\^^Q=\other
6042 \catcode`\^^R=\other
6043 \catcode`\^^S=\other
6044 \catcode`\^^T=\other
6045 \catcode`\^^U=\other
6046 \catcode`\^^V=\other
6047 \catcode`\^^W=\other
6048 \catcode`\^^X=\other
6049 \catcode`\^^Z=\other
6050 \catcode`\^^[=\other
6051 \catcode`\^^\=\other
6052 \catcode`\^^]=\other
6053 \catcode`\^^^=\other
6054 \catcode`\^^_=\other
6055 % It was suggested to set the catcode of ^ to 7, which would allow ^^e4 etc.
6056 % in xref tags, i.e., node names. But since ^^e4 notation isn't
6057 % supported in the main text, it doesn't seem desirable. Furthermore,
6058 % that is not enough: for node names that actually contain a ^
6059 % character, we would end up writing a line like this: 'xrdef {'hat
6060 % b-title}{'hat b} and \xrdef does a \csname...\endcsname on the first
6061 % argument, and \hat is not an expandable control sequence. It could
6062 % all be worked out, but why? Either we support ^^ or we don't.
6064 % The other change necessary for this was to define \auxhat:
6065 % \def\auxhat{\def^{'hat }}% extra space so ok if followed by letter
6066 % and then to call \auxhat in \setq.
6070 % Special characters. Should be turned off anyway, but...
6083 \catcode`+=\other % avoid \+ for paranoia even though we've turned it off
6085 % This is to support \ in node names and titles, since the \
6086 % characters end up in a \csname. It's easier than
6087 % leaving it active and making its active definition an actual \
6088 % character. What I don't understand is why it works in the *value*
6089 % of the xrdef. Seems like it should be a catcode12 \, and that
6090 % should not typeset properly. But it works, so I'm moving on for
6091 % now. --karl, 15jan04.
6094 % Make the characters 128-255 be printing characters.
6098 \catcode\count 1=\other
6099 \advance\count 1 by 1
6100 \ifnum \count 1<256 \loop \fi
6104 % @ is our escape character in .aux files, and we need braces.
6113 \message{insertions,}
6114 % including footnotes.
6116 \newcount \footnoteno
6118 % The trailing space in the following definition for supereject is
6119 % vital for proper filling; pages come out unaligned when you do a
6120 % pagealignmacro call if that space before the closing brace is
6121 % removed. (Generally, numeric constants should always be followed by a
6122 % space to prevent strange expansion errors.)
6123 \def\supereject{\par\penalty -20000\footnoteno =0 }
6125 % @footnotestyle is meaningful for info output only.
6126 \let\footnotestyle=\comment
6130 % Auto-number footnotes. Otherwise like plain.
6132 \let\indent=\ptexindent
6133 \let\noindent=\ptexnoindent
6134 \global\advance\footnoteno by \@ne
6135 \edef\thisfootno{$^{\the\footnoteno}$}%
6137 % In case the footnote comes at the end of a sentence, preserve the
6138 % extra spacing after we do the footnote number.
6140 \ifhmode\edef\@sf{\spacefactor\the\spacefactor}\ptexslash\fi
6142 % Remove inadvertent blank space before typesetting the footnote number.
6148 % Don't bother with the trickery in plain.tex to not require the
6149 % footnote text as a parameter. Our footnotes don't need to be so general.
6151 % Oh yes, they do; otherwise, @ifset (and anything else that uses
6152 % \parseargline) fails inside footnotes because the tokens are fixed when
6153 % the footnote is read. --karl, 16nov96.
6156 \insert\footins\bgroup
6157 % We want to typeset this text as a normal paragraph, even if the
6158 % footnote reference occurs in (for example) a display environment.
6159 % So reset some parameters.
6161 \interlinepenalty\interfootnotelinepenalty
6162 \splittopskip\ht\strutbox % top baseline for broken footnotes
6163 \splitmaxdepth\dp\strutbox
6164 \floatingpenalty\@MM
6169 \parindent\defaultparindent
6173 % Because we use hanging indentation in footnotes, a @noindent appears
6174 % to exdent this text, so make it be a no-op. makeinfo does not use
6175 % hanging indentation so @noindent can still be needed within footnote
6176 % text after an @example or the like (not that this is good style).
6177 \let\noindent = \relax
6179 % Hang the footnote text off the number. Use \everypar in case the
6180 % footnote extends for more than one paragraph.
6181 \everypar = {\hang}%
6182 \textindent{\thisfootno}%
6184 % Don't crash into the line above the footnote text. Since this
6185 % expands into a box, it must come within the paragraph, lest it
6186 % provide a place where TeX can split the footnote.
6188 \futurelet\next\fo@t
6190 }%end \catcode `\@=11
6192 % In case a @footnote appears in a vbox, save the footnote text and create
6193 % the real \insert just after the vbox finished. Otherwise, the insertion
6195 % Similarily, if a @footnote appears inside an alignment, save the footnote
6196 % text to a box and make the \insert when a row of the table is finished.
6197 % And the same can be done for other insert classes. --kasal, 16nov03.
6199 % Replace the \insert primitive by a cheating macro.
6200 % Deeper inside, just make sure that the saved insertions are not spilled
6203 \def\startsavinginserts{%
6204 \ifx \insert\ptexinsert
6205 \let\insert\saveinsert
6207 \let\checkinserts\relax
6211 % This \insert replacement works for both \insert\footins{foo} and
6212 % \insert\footins\bgroup foo\egroup, but it doesn't work for \insert27{foo}.
6215 \edef\next{\noexpand\savetobox \makeSAVEname#1}%
6216 \afterassignment\next
6217 % swallow the left brace
6220 \def\makeSAVEname#1{\makecsname{SAVE\expandafter\gobble\string#1}}
6221 \def\savetobox#1{\global\setbox#1 = \vbox\bgroup \unvbox#1}
6223 \def\checksaveins#1{\ifvoid#1\else \placesaveins#1\fi}
6225 \def\placesaveins#1{%
6226 \ptexinsert \csname\expandafter\gobblesave\string#1\endcsname
6230 % eat @SAVE -- beware, all of them have catcode \other:
6232 \def\dospecials{\do S\do A\do V\do E} \uncatcodespecials % ;-)
6233 \gdef\gobblesave @SAVE{}
6237 \def\newsaveins #1{%
6238 \edef\next{\noexpand\newsaveinsX \makeSAVEname#1}%
6241 \def\newsaveinsX #1{%
6242 \csname newbox\endcsname #1%
6243 \expandafter\def\expandafter\checkinserts\expandafter{\checkinserts
6248 \let\checkinserts\empty
6253 % @image. We use the macros from epsf.tex to support this.
6254 % If epsf.tex is not installed and @image is used, we complain.
6256 % Check for and read epsf.tex up front. If we read it only at @image
6257 % time, we might be inside a group, and then its definitions would get
6258 % undone and the next image would fail.
6259 \openin 1 = epsf.tex
6261 % Do not bother showing banner with epsf.tex v2.7k (available in
6262 % doc/epsf.tex and on ctan).
6263 \def\epsfannounce{\toks0 = }%
6268 % We will only complain once about lack of epsf.tex.
6269 \newif\ifwarnednoepsf
6270 \newhelp\noepsfhelp{epsf.tex must be installed for images to
6271 work. It is also included in the Texinfo distribution, or you can get
6272 it from ftp://tug.org/tex/epsf.tex.}
6275 \ifx\epsfbox\undefined
6276 \ifwarnednoepsf \else
6277 \errhelp = \noepsfhelp
6278 \errmessage{epsf.tex not found, images will be ignored}%
6279 \global\warnednoepsftrue
6282 \imagexxx #1,,,,,\finish
6286 % Arguments to @image:
6287 % #1 is (mandatory) image filename; we tack on .eps extension.
6288 % #2 is (optional) width, #3 is (optional) height.
6289 % #4 is (ignored optional) html alt text.
6290 % #5 is (ignored optional) extension.
6291 % #6 is just the usual extra ignored arg for parsing this stuff.
6293 \def\imagexxx#1,#2,#3,#4,#5,#6\finish{\begingroup
6294 \catcode`\^^M = 5 % in case we're inside an example
6295 \normalturnoffactive % allow _ et al. in names
6296 % If the image is by itself, center it.
6300 % Usually we'll have text after the image which will insert
6301 % \parskip glue, so insert it here too to equalize the space
6303 \nobreak\vskip\parskip
6310 \dopdfimage{#1}{#2}{#3}%
6312 % \epsfbox itself resets \epsf?size at each figure.
6313 \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \epsfxsize=#2\relax \fi
6314 \setbox0 = \hbox{\ignorespaces #3}\ifdim\wd0 > 0pt \epsfysize=#3\relax \fi
6318 \ifimagevmode \hss \egroup \bigbreak \fi % space after the image
6322 % @float FLOATTYPE,LOC ... @end float for displayed figures, tables, etc.
6323 % We don't actually implement floating yet, we just plop the float "here".
6324 % But it seemed the best name for the future.
6326 \envparseargdef\float{\dofloat #1,,,\finish}
6328 % #1 is the optional FLOATTYPE, the text label for this float, typically
6329 % "Figure", "Table", "Example", etc. Can't contain commas. If omitted,
6330 % this float will not be numbered and cannot be referred to.
6332 % #2 is the optional xref label. Also must be present for the float to
6335 % #3 is the optional positioning argument; for now, it is ignored. It
6336 % will somehow specify the positions allowed to float to (here, top, bottom).
6338 % We keep a separate counter for each FLOATTYPE, which we reset at each
6339 % chapter-level command.
6340 \let\resetallfloatnos=\empty
6342 \def\dofloat#1,#2,#3,#4\finish{%
6343 \let\thiscaption=\empty
6344 \let\thisshortcaption=\empty
6346 % don't lose footnotes inside @float.
6349 % We can't be used inside a paragraph.
6354 \def\floatlabel{#2}%
6355 \def\floatloc{#3}% we do nothing with this yet.
6357 \ifx\floattype\empty
6358 \let\safefloattype=\empty
6361 % the floattype might have accents or other special characters,
6362 % but we need to use it in a control sequence name.
6365 \xdef\safefloattype{\floattype}%
6369 % If label is given but no type, we handle that as the empty type.
6370 \ifx\floatlabel\empty \else
6371 % We want each FLOATTYPE to be numbered separately (Figure 1,
6372 % Table 1, Figure 2, ...). (And if no label, no number.)
6374 \expandafter\getfloatno\csname\safefloattype floatno\endcsname
6375 \global\advance\floatno by 1
6378 % This magic value for \thissection is output by \setref as the
6379 % XREFLABEL-title value. \xrefX uses it to distinguish float
6380 % labels (which have a completely different output format) from
6381 % node and anchor labels. And \xrdef uses it to construct the
6384 \edef\thissection{\floatmagic=\safefloattype}%
6385 \setref{\floatlabel}{Yfloat}%
6389 % start with \parskip glue, I guess.
6392 % Don't suppress indentation if a float happens to start a section.
6393 \restorefirstparagraphindent
6396 % we have these possibilities:
6397 % @float Foo,lbl & @caption{Cap}: Foo 1.1: Cap
6398 % @float Foo,lbl & no caption: Foo 1.1
6399 % @float Foo & @caption{Cap}: Foo: Cap
6400 % @float Foo & no caption: Foo
6401 % @float ,lbl & Caption{Cap}: 1.1: Cap
6402 % @float ,lbl & no caption: 1.1
6403 % @float & @caption{Cap}: Cap
6404 % @float & no caption:
6407 \let\floatident = \empty
6409 % In all cases, if we have a float type, it comes first.
6410 \ifx\floattype\empty \else \def\floatident{\floattype}\fi
6412 % If we have an xref label, the number comes next.
6413 \ifx\floatlabel\empty \else
6414 \ifx\floattype\empty \else % if also had float type, need tie first.
6415 \appendtomacro\floatident{\tie}%
6418 \appendtomacro\floatident{\chaplevelprefix\the\floatno}%
6421 % Start the printed caption with what we've constructed in
6422 % \floatident, but keep it separate; we need \floatident again.
6423 \let\captionline = \floatident
6425 \ifx\thiscaption\empty \else
6426 \ifx\floatident\empty \else
6427 \appendtomacro\captionline{: }% had ident, so need a colon between
6431 \appendtomacro\captionline\thiscaption
6434 % If we have anything to print, print it, with space before.
6435 % Eventually this needs to become an \insert.
6436 \ifx\captionline\empty \else
6441 % If have an xref label, write the list of floats info. Do this
6442 % after the caption, to avoid chance of it being a breakpoint.
6443 \ifx\floatlabel\empty \else
6444 % Write the text that goes in the lof to the aux file as
6445 % \floatlabel-lof. Besides \floatident, we include the short
6446 % caption if specified, else the full caption if specified, else nothing.
6448 \atdummies \turnoffactive \otherbackslash
6449 \immediate\write\auxfile{@xrdef{\floatlabel-lof}{%
6451 \ifx\thisshortcaption\empty
6452 \ifx\thiscaption\empty \else : \thiscaption \fi
6460 % Space below caption, if we printed anything.
6461 \ifx\printedsomething\empty \else \vskip\parskip \fi
6462 \egroup % end of \vtop
6466 % Append the tokens #2 to the definition of macro #1, not expanding either.
6468 \newtoks\appendtomacroAtoks
6469 \newtoks\appendtomacroBtoks
6470 \def\appendtomacro#1#2{%
6471 \appendtomacroAtoks = \expandafter{#1}%
6472 \appendtomacroBtoks = {#2}%
6473 \edef#1{\the\appendtomacroAtoks \the\appendtomacroBtoks}%
6476 % @caption, @shortcaption are easy.
6478 \long\def\caption#1{\checkenv\float \def\thiscaption{#1}}
6479 \def\shortcaption#1{\checkenv\float \def\thisshortcaption{#1}}
6481 % The parameter is the control sequence identifying the counter we are
6482 % going to use. Create it if it doesn't exist and assign it to \floatno.
6485 % Haven't seen this figure type before.
6486 \csname newcount\endcsname #1%
6488 % Remember to reset this floatno at the next chap.
6489 \expandafter\gdef\expandafter\resetallfloatnos
6490 \expandafter{\resetallfloatnos #1=0 }%
6495 % \setref calls this to get the XREFLABEL-snt value. We want an @xref
6496 % to the FLOATLABEL to expand to "Figure 3.1". We call \setref when we
6497 % first read the @float command.
6499 \def\Yfloat{\floattype@tie \chaplevelprefix\the\floatno}%
6501 % Magic string used for the XREFLABEL-title value, so \xrefX can
6502 % distinguish floats from other xref types.
6503 \def\floatmagic{!!float!!}
6505 % #1 is the control sequence we are passed; we expand into a conditional
6506 % which is true if #1 represents a float ref. That is, the magic
6507 % \thissection value which we \setref above.
6509 \def\iffloat#1{\expandafter\doiffloat#1==\finish}
6511 % #1 is (maybe) the \floatmagic string. If so, #2 will be the
6512 % (safe) float type for this float. We set \iffloattype to #2.
6514 \def\doiffloat#1=#2=#3\finish{%
6516 \def\iffloattype{#2}%
6517 \ifx\temp\floatmagic
6520 % @listoffloats FLOATTYPE - print a list of floats like a table of contents.
6522 \parseargdef\listoffloats{%
6523 \def\floattype{#1}% floattype
6525 % the floattype might have accents or other special characters,
6526 % but we need to use it in a control sequence name.
6529 \xdef\safefloattype{\floattype}%
6532 % \xrdef saves the floats as a \do-list in \floatlistSAFEFLOATTYPE.
6533 \expandafter\ifx\csname floatlist\safefloattype\endcsname \relax
6535 % if the user said @listoffloats foo but never @float foo.
6536 \message{\linenumber No `\safefloattype' floats to list.}%
6540 \leftskip=\tocindent % indent these entries like a toc
6541 \let\do=\listoffloatsdo
6542 \csname floatlist\safefloattype\endcsname
6547 % This is called on each entry in a list of floats. We're passed the
6548 % xref label, in the form LABEL-title, which is how we save it in the
6549 % aux file. We strip off the -title and look up \XRLABEL-lof, which
6550 % has the text we're supposed to typeset here.
6552 % Figures without xref labels will not be included in the list (since
6553 % they won't appear in the aux file).
6555 \def\listoffloatsdo#1{\listoffloatsdoentry#1\finish}
6556 \def\listoffloatsdoentry#1-title\finish{{%
6557 % Can't fully expand XR#1-lof because it can contain anything. Just
6558 % pass the control sequence. On the other hand, XR#1-pg is just the
6559 % page number, and we want to fully expand that so we can get a link
6561 \toksA = \expandafter{\csname XR#1-lof\endcsname}%
6563 % use the same \entry macro we use to generate the TOC and index.
6564 \edef\writeentry{\noexpand\entry{\the\toksA}{\csname XR#1-pg\endcsname}}%
6568 \message{localization,}
6571 % @documentlanguage is usually given very early, just after
6572 % @setfilename. If done too late, it may not override everything
6573 % properly. Single argument is the language abbreviation.
6574 % It would be nice if we could set up a hyphenation file here.
6576 \parseargdef\documentlanguage{%
6577 \tex % read txi-??.tex file in plain TeX.
6578 % Read the file if it exists.
6579 \openin 1 txi-#1.tex
6581 \errhelp = \nolanghelp
6582 \errmessage{Cannot read language file txi-#1.tex}%
6589 \newhelp\nolanghelp{The given language definition file cannot be found or
6590 is empty. Maybe you need to install it? In the current directory
6591 should work if nowhere else does.}
6594 % @documentencoding should change something in TeX eventually, most
6595 % likely, but for now just recognize it.
6596 \let\documentencoding = \comment
6599 % Page size parameters.
6601 \newdimen\defaultparindent \defaultparindent = 15pt
6603 \chapheadingskip = 15pt plus 4pt minus 2pt
6604 \secheadingskip = 12pt plus 3pt minus 2pt
6605 \subsecheadingskip = 9pt plus 2pt minus 2pt
6607 % Prevent underfull vbox error messages.
6610 % Don't be so finicky about underfull hboxes, either.
6613 % Following George Bush, just get rid of widows and orphans.
6617 % Use TeX 3.0's \emergencystretch to help line breaking, but if we're
6618 % using an old version of TeX, don't do anything. We want the amount of
6619 % stretch added to depend on the line length, hence the dependence on
6620 % \hsize. We call this whenever the paper size is set.
6622 \def\setemergencystretch{%
6623 \ifx\emergencystretch\thisisundefined
6624 % Allow us to assign to \emergencystretch anyway.
6625 \def\emergencystretch{\dimen0}%
6627 \emergencystretch = .15\hsize
6631 % Parameters in order: 1) textheight; 2) textwidth; 3) voffset;
6632 % 4) hoffset; 5) binding offset; 6) topskip; 7) physical page height; 8)
6633 % physical page width.
6635 % We also call \setleading{\textleading}, so the caller should define
6636 % \textleading. The caller should also set \parskip.
6638 \def\internalpagesizes#1#2#3#4#5#6#7#8{%
6641 \splittopskip = \topskip
6644 \advance\vsize by \topskip
6645 \outervsize = \vsize
6646 \advance\outervsize by 2\topandbottommargin
6647 \pageheight = \vsize
6650 \outerhsize = \hsize
6651 \advance\outerhsize by 0.5in
6654 \normaloffset = #4\relax
6655 \bindingoffset = #5\relax
6658 \pdfpageheight #7\relax
6659 \pdfpagewidth #8\relax
6662 \setleading{\textleading}
6664 \parindent = \defaultparindent
6665 \setemergencystretch
6668 % @letterpaper (the default).
6669 \def\letterpaper{{\globaldefs = 1
6670 \parskip = 3pt plus 2pt minus 1pt
6671 \textleading = 13.2pt
6673 % If page is nothing but text, make it come out even.
6674 \internalpagesizes{46\baselineskip}{6in}%
6676 {\bindingoffset}{36pt}%
6680 % Use @smallbook to reset parameters for 7x9.5 (or so) format.
6681 \def\smallbook{{\globaldefs = 1
6682 \parskip = 2pt plus 1pt
6685 \internalpagesizes{7.5in}{5in}%
6687 {\bindingoffset}{16pt}%
6690 \lispnarrowing = 0.3in
6693 \contentsrightmargin = 0pt
6694 \defbodyindent = .5cm
6697 % Use @afourpaper to print on European A4 paper.
6698 \def\afourpaper{{\globaldefs = 1
6699 \parskip = 3pt plus 2pt minus 1pt
6700 \textleading = 13.2pt
6702 % Double-side printing via postscript on Laserjet 4050
6703 % prints double-sided nicely when \bindingoffset=10mm and \hoffset=-6mm.
6704 % To change the settings for a different printer or situation, adjust
6705 % \normaloffset until the front-side and back-side texts align. Then
6706 % do the same for \bindingoffset. You can set these for testing in
6707 % your texinfo source file like this:
6709 % \global\normaloffset = -6mm
6710 % \global\bindingoffset = 10mm
6712 \internalpagesizes{51\baselineskip}{160mm}
6713 {\voffset}{\hoffset}%
6714 {\bindingoffset}{44pt}%
6719 \contentsrightmargin = 0pt
6720 \defbodyindent = 5mm
6723 % Use @afivepaper to print on European A5 paper.
6724 % From romildo@urano.iceb.ufop.br, 2 July 2000.
6725 % He also recommends making @example and @lisp be small.
6726 \def\afivepaper{{\globaldefs = 1
6727 \parskip = 2pt plus 1pt minus 0.1pt
6728 \textleading = 12.5pt
6730 \internalpagesizes{160mm}{120mm}%
6731 {\voffset}{\hoffset}%
6732 {\bindingoffset}{8pt}%
6735 \lispnarrowing = 0.2in
6738 \contentsrightmargin = 0pt
6739 \defbodyindent = 2mm
6743 % A specific text layout, 24x15cm overall, intended for A4 paper.
6744 \def\afourlatex{{\globaldefs = 1
6746 \internalpagesizes{237mm}{150mm}%
6748 {\bindingoffset}{7mm}%
6751 % Must explicitly reset to 0 because we call \afourpaper.
6755 % Use @afourwide to print on A4 paper in landscape format.
6756 \def\afourwide{{\globaldefs = 1
6758 \internalpagesizes{241mm}{165mm}%
6759 {\voffset}{-2.95mm}%
6760 {\bindingoffset}{7mm}%
6765 % @pagesizes TEXTHEIGHT[,TEXTWIDTH]
6766 % Perhaps we should allow setting the margins, \topskip, \parskip,
6767 % and/or leading, also. Or perhaps we should compute them somehow.
6769 \parseargdef\pagesizes{\pagesizesyyy #1,,\finish}
6770 \def\pagesizesyyy#1,#2,#3\finish{{%
6771 \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \hsize=#2\relax \fi
6774 \parskip = 3pt plus 2pt minus 1pt
6775 \setleading{\textleading}%
6778 \advance\dimen0 by \voffset
6781 \advance\dimen2 by \normaloffset
6783 \internalpagesizes{#1}{\hsize}%
6784 {\voffset}{\normaloffset}%
6785 {\bindingoffset}{44pt}%
6789 % Set default to letter.
6794 \message{and turning on texinfo input format.}
6796 % Define macros to output various characters with catcode for normal text.
6806 \def\normaldoublequote{"}
6809 \def\normalunderscore{_}
6810 \def\normalverticalbar{|}
6812 \def\normalgreater{>}
6814 \def\normaldollar{$}%$ font-lock fix
6816 % This macro is used to make a character print one way in \tt
6817 % (where it can probably be output as-is), and another way in other fonts,
6818 % where something hairier probably needs to be done.
6820 % #1 is what to print if we are indeed using \tt; #2 is what to print
6821 % otherwise. Since all the Computer Modern typewriter fonts have zero
6822 % interword stretch (and shrink), and it is reasonable to expect all
6823 % typewriter fonts to have this, we can check that font parameter.
6825 \def\ifusingtt#1#2{\ifdim \fontdimen3\font=0pt #1\else #2\fi}
6827 % Same as above, but check for italic font. Actually this also catches
6828 % non-italic slanted fonts since it is impossible to distinguish them from
6829 % italic fonts. But since this is only used by $ and it uses \sl anyway
6830 % this is not a problem.
6831 \def\ifusingit#1#2{\ifdim \fontdimen1\font>0pt #1\else #2\fi}
6833 % Turn off all special characters except @
6834 % (and those which the user can use as if they were ordinary).
6835 % Most of these we simply print from the \tt font, but for some, we can
6836 % use math or other variants that look better in normal text.
6839 \def\activedoublequote{{\tt\char34}}
6840 \let"=\activedoublequote
6842 \def~{{\tt\char126}}
6848 \def_{\ifusingtt\normalunderscore\_}
6849 % Subroutine for the previous macro.
6850 \def\_{\leavevmode \kern.07em \vbox{\hrule width.3em height.1ex}\kern .07em }
6853 \def|{{\tt\char124}}
6861 \def+{{\tt \char 43}}
6863 \def${\ifusingit{{\sl\$}}\normaldollar}%$ font-lock fix
6865 % If a .fmt file is being used, characters that might appear in a file
6866 % name cannot be active until we have parsed the command line.
6867 % So turn them off again, and have \everyjob (or @setfilename) turn them on.
6868 % \otherifyactive is called near the end of this file.
6869 \def\otherifyactive{\catcode`+=\other \catcode`\_=\other}
6873 % \backslashcurfont outputs one backslash character in current font,
6875 \global\chardef\backslashcurfont=`\\
6876 \global\let\rawbackslashxx=\backslashcurfont % let existing .??s files work
6878 % \rawbackslash defines an active \ to do \backslashcurfont.
6879 % \otherbackslash defines an active \ to be a literal `\' character with
6881 {\catcode`\\=\active
6882 @gdef@rawbackslash{@let\=@backslashcurfont}
6883 @gdef@otherbackslash{@let\=@realbackslash}
6886 % \realbackslash is an actual character `\' with catcode other.
6887 {\catcode`\\=\other @gdef@realbackslash{\}}
6889 % \normalbackslash outputs one backslash in fixed width font.
6890 \def\normalbackslash{{\tt\backslashcurfont}}
6894 % Used sometimes to turn off (effectively) the active characters
6895 % even after parsing them.
6896 @def@turnoffactive{%
6897 @let"=@normaldoublequote
6898 @let\=@realbackslash
6901 @let_=@normalunderscore
6902 @let|=@normalverticalbar
6904 @let>=@normalgreater
6906 @let$=@normaldollar %$ font-lock fix
6910 % Same as @turnoffactive except outputs \ as {\tt\char`\\} instead of
6911 % the literal character `\'. (Thus, \ is not expandable when this is in
6914 @def@normalturnoffactive{@turnoffactive @let\=@normalbackslash}
6916 % Make _ and + \other characters, temporarily.
6917 % This is canceled by @fixbackslash.
6920 % If a .fmt file is being used, we don't want the `\input texinfo' to show up.
6921 % That is what \eatinput is for; after that, the `\' should revert to printing
6924 @gdef@eatinput input texinfo{@fixbackslash}
6925 @global@let\ = @eatinput
6927 % On the other hand, perhaps the file did not have a `\input texinfo'. Then
6928 % the first `\{ in the file would cause an error. This macro tries to fix
6929 % that, assuming it is called before the first `\' could plausibly occur.
6930 % Also back turn on active characters that might appear in the input
6931 % file name, in case not using a pre-dumped format.
6933 @gdef@fixbackslash{%
6934 @ifx\@eatinput @let\ = @normalbackslash @fi
6939 % Say @foo, not \foo, in error messages.
6942 % These look ok in all fonts, so just make them not special.
6943 @catcode`@& = @other
6944 @catcode`@# = @other
6945 @catcode`@% = @other
6949 @c eval: (add-hook 'write-file-hooks 'time-stamp)
6950 @c page-delimiter: "^\\\\message"
6951 @c time-stamp-start: "def\\\\texinfoversion{"
6952 @c time-stamp-format: "%:y-%02m-%02d.%02H"
6953 @c time-stamp-end: "}"
6959 arch-tag: e1b36e32-c96e-4135-a41a-0b2efa2ea115