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{2003-11-15.16}
8 % Copyright (C) 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
9 % 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
11 % This texinfo.tex file is free software; you can redistribute it and/or
12 % modify it under the terms of the GNU General Public License as
13 % published by the Free Software Foundation; either version 2, or (at
14 % your option) any later version.
16 % This texinfo.tex file is distributed in the hope that it will be
17 % useful, but WITHOUT ANY WARRANTY; without even the implied warranty
18 % of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 % General Public License for more details.
21 % You should have received a copy of the GNU General Public License
22 % along with this texinfo.tex file; see the file COPYING. If not, write
23 % to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 % Boston, MA 02111-1307, USA.
26 % As a special exception, when this file is read by TeX when processing
27 % a Texinfo source document, you may use the result without
28 % restriction. (This has been our intent since Texinfo was invented.)
30 % Please try the latest version of texinfo.tex before submitting bug
31 % reports; you can get the latest version from:
32 % http://www.gnu.org/software/texinfo/ (the Texinfo home page), or
33 % ftp://tug.org/tex/texinfo.tex
34 % (and all CTAN mirrors, see http://www.ctan.org).
35 % The texinfo.tex in any given distribution could well be out
36 % of date, so if that's what you're using, please check.
38 % Send bug reports to bug-texinfo@gnu.org. Please include including a
39 % complete document in each bug report with which we can reproduce the
40 % problem. Patches are, of course, greatly appreciated.
42 % To process a Texinfo manual with TeX, it's most reliable to use the
43 % texi2dvi shell script that comes with the distribution. For a simple
44 % manual foo.texi, however, you can get away with this:
49 % dvips foo.dvi -o # or whatever; this makes foo.ps.
50 % The extra TeX runs get the cross-reference information correct.
51 % Sometimes one run after texindex suffices, and sometimes you need more
52 % than two; texi2dvi does it as many times as necessary.
54 % It is possible to adapt texinfo.tex for other languages, to some
55 % extent. You can get the existing language-specific files from the
56 % full Texinfo distribution.
58 % The GNU Texinfo home page is http://www.gnu.org/software/texinfo.
61 \message{Loading texinfo [version \texinfoversion]:}
63 % If in a .fmt file, print the version number
64 % and turn on active characters that we couldn't do earlier because
65 % they might have appeared in the input file name.
66 \everyjob{\message{[Texinfo version \texinfoversion]}%
67 \catcode`+=\active \catcode`\_=\active}
72 % We never want plain's \outer definition of \+ in Texinfo.
73 % For @tex, we can use \tabalign.
76 % Save some plain tex macros whose names we will redefine.
78 \let\ptexbullet=\bullet
89 \let\ptexindent=\indent
90 \let\ptexnoindent=\noindent
99 % If this character appears in an error message or help string, it
100 % starts a new line in the output.
103 % Set up fixed words for English if not already set.
104 \ifx\putwordAppendix\undefined \gdef\putwordAppendix{Appendix}\fi
105 \ifx\putwordChapter\undefined \gdef\putwordChapter{Chapter}\fi
106 \ifx\putwordfile\undefined \gdef\putwordfile{file}\fi
107 \ifx\putwordin\undefined \gdef\putwordin{in}\fi
108 \ifx\putwordIndexIsEmpty\undefined \gdef\putwordIndexIsEmpty{(Index is empty)}\fi
109 \ifx\putwordIndexNonexistent\undefined \gdef\putwordIndexNonexistent{(Index is nonexistent)}\fi
110 \ifx\putwordInfo\undefined \gdef\putwordInfo{Info}\fi
111 \ifx\putwordInstanceVariableof\undefined \gdef\putwordInstanceVariableof{Instance Variable of}\fi
112 \ifx\putwordMethodon\undefined \gdef\putwordMethodon{Method on}\fi
113 \ifx\putwordNoTitle\undefined \gdef\putwordNoTitle{No Title}\fi
114 \ifx\putwordof\undefined \gdef\putwordof{of}\fi
115 \ifx\putwordon\undefined \gdef\putwordon{on}\fi
116 \ifx\putwordpage\undefined \gdef\putwordpage{page}\fi
117 \ifx\putwordsection\undefined \gdef\putwordsection{section}\fi
118 \ifx\putwordSection\undefined \gdef\putwordSection{Section}\fi
119 \ifx\putwordsee\undefined \gdef\putwordsee{see}\fi
120 \ifx\putwordSee\undefined \gdef\putwordSee{See}\fi
121 \ifx\putwordShortTOC\undefined \gdef\putwordShortTOC{Short Contents}\fi
122 \ifx\putwordTOC\undefined \gdef\putwordTOC{Table of Contents}\fi
124 \ifx\putwordMJan\undefined \gdef\putwordMJan{January}\fi
125 \ifx\putwordMFeb\undefined \gdef\putwordMFeb{February}\fi
126 \ifx\putwordMMar\undefined \gdef\putwordMMar{March}\fi
127 \ifx\putwordMApr\undefined \gdef\putwordMApr{April}\fi
128 \ifx\putwordMMay\undefined \gdef\putwordMMay{May}\fi
129 \ifx\putwordMJun\undefined \gdef\putwordMJun{June}\fi
130 \ifx\putwordMJul\undefined \gdef\putwordMJul{July}\fi
131 \ifx\putwordMAug\undefined \gdef\putwordMAug{August}\fi
132 \ifx\putwordMSep\undefined \gdef\putwordMSep{September}\fi
133 \ifx\putwordMOct\undefined \gdef\putwordMOct{October}\fi
134 \ifx\putwordMNov\undefined \gdef\putwordMNov{November}\fi
135 \ifx\putwordMDec\undefined \gdef\putwordMDec{December}\fi
137 \ifx\putwordDefmac\undefined \gdef\putwordDefmac{Macro}\fi
138 \ifx\putwordDefspec\undefined \gdef\putwordDefspec{Special Form}\fi
139 \ifx\putwordDefvar\undefined \gdef\putwordDefvar{Variable}\fi
140 \ifx\putwordDefopt\undefined \gdef\putwordDefopt{User Option}\fi
141 \ifx\putwordDeftypevar\undefined\gdef\putwordDeftypevar{Variable}\fi
142 \ifx\putwordDeffunc\undefined \gdef\putwordDeffunc{Function}\fi
143 \ifx\putwordDeftypefun\undefined\gdef\putwordDeftypefun{Function}\fi
145 % In some macros, we cannot use the `\? notation---the left quote is
146 % in some cases the escape char.
147 \chardef\colonChar = `\:
148 \chardef\commaChar = `\,
149 \chardef\dotChar = `\.
150 \chardef\equalChar = `\=
151 \chardef\exclamChar= `\!
152 \chardef\questChar = `\?
153 \chardef\semiChar = `\;
154 \chardef\spaceChar = `\ %
155 \chardef\underChar = `\_
162 \hyphenation{ap-pen-dix}
164 \hyphenation{mini-buf-fer mini-buf-fers}
165 \hyphenation{time-stamp}
166 \hyphenation{white-space}
168 % Margin to add to right of even pages, to left of odd pages.
169 \newdimen\bindingoffset
170 \newdimen\normaloffset
171 \newdimen\pagewidth \newdimen\pageheight
173 % Sometimes it is convenient to have everything in the transcript file
174 % and nothing on the terminal. We don't just call \tracingall here,
175 % since that produces some useless output on the terminal. We also make
176 % some effort to order the tracing commands to reduce output in the log
177 % file; cf. trace.sty in LaTeX.
179 \def\gloggingall{\begingroup \globaldefs = 1 \loggingall \endgroup}%
183 \tracinglostchars2 % 2 gives us more in etex
188 \showboxbreadth\maxdimen \showboxdepth\maxdimen
189 \ifx\eTeXversion\undefined\else % etex gives us more logging
196 \tracingcommands3 % 3 gives us more in etex
197 \errorcontextlines\maxdimen
200 % add check for \lastpenalty to plain's definitions. If the last thing
201 % we did was a \nobreak, we don't want to insert more space.
203 \def\smallbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\smallskipamount
204 \removelastskip\penalty-50\smallskip\fi\fi}
205 \def\medbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\medskipamount
206 \removelastskip\penalty-100\medskip\fi\fi}
207 \def\bigbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\bigskipamount
208 \removelastskip\penalty-200\bigskip\fi\fi}
210 % For @cropmarks command.
211 % Do @cropmarks to get crop marks.
214 \let\cropmarks = \cropmarkstrue
216 % Dimensions to add cropmarks at corners.
217 % Added by P. A. MacKay, 12 Nov. 1986
219 \newdimen\outerhsize \newdimen\outervsize % set by the paper size routines
220 \newdimen\cornerlong \cornerlong=1pc
221 \newdimen\cornerthick \cornerthick=.3pt
222 \newdimen\topandbottommargin \topandbottommargin=.75in
224 % Main output routine.
226 \output = {\onepageout{\pagecontents\PAGE}}
231 % \onepageout takes a vbox as an argument. Note that \pagecontents
232 % does insertions, but you have to call it yourself.
234 \ifcropmarks \hoffset=0pt \else \hoffset=\normaloffset \fi
236 \ifodd\pageno \advance\hoffset by \bindingoffset
237 \else \advance\hoffset by -\bindingoffset\fi
239 % Do this outside of the \shipout so @code etc. will be expanded in
240 % the headline as they should be, not taken literally (outputting ''code).
241 \setbox\headlinebox = \vbox{\let\hsize=\pagewidth \makeheadline}%
242 \setbox\footlinebox = \vbox{\let\hsize=\pagewidth \makefootline}%
245 % Have to do this stuff outside the \shipout because we want it to
246 % take effect in \write's, yet the group defined by the \vbox ends
247 % before the \shipout runs.
249 \escapechar = `\\ % use backslash in output files.
250 \indexdummies % don't expand commands in the output.
251 \normalturnoffactive % \ in index entries must not stay \, e.g., if
252 % the page break happens to be in the middle of an example.
254 % Do this early so pdf references go to the beginning of the page.
255 \ifpdfmakepagedest \pdfdest name{\the\pageno} xyz\fi
257 \ifcropmarks \vbox to \outervsize\bgroup
259 \vskip-\topandbottommargin
261 \line{\ewtop\hfil\ewtop}%
264 \vbox{\moveleft\cornerthick\nstop}%
266 \vbox{\moveright\cornerthick\nstop}%
269 \vskip\topandbottommargin
271 \hfil % center the page within the outer (page) hsize.
272 \ifodd\pageno\hskip\bindingoffset\fi
278 \ifdim\ht\footlinebox > 0pt
279 % Only leave this space if the footline is nonempty.
280 % (We lessened \vsize for it in \oddfootingxxx.)
281 % The \baselineskip=24pt in plain's \makefootline has no effect.
282 \vskip 2\baselineskip
287 \egroup % end of \vbox\bgroup
288 \hfil\egroup % end of (centering) \line\bgroup
289 \vskip\topandbottommargin plus1fill minus1fill
290 \boxmaxdepth = \cornerthick
293 \vbox{\moveleft\cornerthick\nsbot}%
295 \vbox{\moveright\cornerthick\nsbot}%
298 \line{\ewbot\hfil\ewbot}%
300 \egroup % \vbox from first cropmarks clause
302 }% end of \shipout\vbox
303 }% end of group with \normalturnoffactive
305 \ifnum\outputpenalty>-20000 \else\dosupereject\fi
308 \newinsert\margin \dimen\margin=\maxdimen
310 \def\pagebody#1{\vbox to\pageheight{\boxmaxdepth=\maxdepth #1}}
312 \gdef\pagecontents#1{\ifvoid\topins\else\unvbox\topins\fi
313 % marginal hacks, juha@viisa.uucp (Juha Takala)
314 \ifvoid\margin\else % marginal info is present
315 \rlap{\kern\hsize\vbox to\z@{\kern1pt\box\margin \vss}}\fi
316 \dimen@=\dp#1 \unvbox#1
317 \ifvoid\footins\else\vskip\skip\footins\footnoterule \unvbox\footins\fi
318 \ifr@ggedbottom \kern-\dimen@ \vfil \fi}
321 % Here are the rules for the cropmarks. Note that they are
322 % offset so that the space between them is truly \outerhsize or \outervsize
323 % (P. A. MacKay, 12 November, 1986)
325 \def\ewtop{\vrule height\cornerthick depth0pt width\cornerlong}
327 {\hrule height\cornerthick depth\cornerlong width\cornerthick}}
328 \def\ewbot{\vrule height0pt depth\cornerthick width\cornerlong}
330 {\hrule height\cornerlong depth\cornerthick width\cornerthick}}
332 % Parse an argument, then pass it to #1. The argument is the rest of
333 % the input line (except we remove a trailing comment). #1 should be a
334 % macro which expects an ordinary undelimited TeX argument.
336 \def\parsearg{\parseargusing{}}
337 \def\parseargusing#1#2{%
345 % If the next token is an obeyed space (from an @example environment or
346 % the like), remove it and recurse. Otherwise, we're done.
347 \def\parseargx{\futurelet\temp\parseargy}
349 \expandafter\ifx\obeyedspace\temp
350 \def\temp{\expandafter\parseargx\gobble}
352 \def\temp{\parseargline\empty}% Insert the \empty token, see below.
358 \gdef\parseargline#1^^M{%
359 \endgroup % End of the group started in \parsearg.
360 \argremovecomment #1\comment\ArgTerm%
364 % First remove any @comment, then any @c comment.
365 \def\argremovecomment#1\comment#2\ArgTerm{\argremovec #1\c\ArgTerm}
366 \def\argremovec#1\c#2\ArgTerm{\removeactivespaces#1\ArgTerm}
367 % \argremovec might leave us with trailing spaces, though; e.g.,
368 % @end itemize @c foo
370 \gdef\removeactivespaces#1\ArgTerm{\removeactivespacesX#1\RemSpac \RemSpac\ArgTerm}
371 \gdef\removeactivespacesX#1 \RemSpac{\removeactivespacesY{#1}}
373 \def\removeactivespacesY#1#2\ArgTerm{%
376 \let\temp\finishparsearg
378 \let\temp\removeactivespaces
383 % If a _delimited_ argument is enclosed in braces, they get stripped; so
384 % to get _exactly_ the rest of the line, we had to prevent such situation.
385 % We prepended an \empty token at the very beginning and we expand it
386 % just before passing the control to \next.
387 % (But first, we have to remove the remaining \RemSpac token.)
388 \def\finishparsearg#1\RemSpac\ArgTerm{\expandafter\next\expandafter{#1}}
390 % Several utility definitions with active space:
395 % Make each space character in the input produce a normal interword
396 % space in the output. Don't allow a line break at this space, as this
397 % is used only in environments like @example, where each line of input
398 % should produce a line of output anyway.
400 \gdef\sepspaces{\obeyspaces\let =\tie}
402 % If an index command is used in an @example environment, any spaces
403 % therein should become regular spaces in the raw index file, not the
404 % expansion of \tie (\leavevmode \penalty \@M \ ).
405 \gdef\unsepspaces{\let =\space}
409 \def\flushcr{\ifx\par\lisppar \def\next##1{}\else \let\next=\relax \fi \next}
412 %% These are used to keep @begin/@end levels from running away
413 %% Call \inENV within environments (after a \begingroup)
414 \newif\ifENV \ENVfalse \def\inENV{\ifENV\relax\else\ENVtrue\fi}
416 \ifENV\errmessage{Still within an environment; press RETURN to continue}
417 \endgroup\fi} % This is not perfect, but it should reduce lossage
419 % @begin foo is the same as @foo, for now.
420 \newhelp\EMsimple{Press RETURN to continue.}
422 \outer\def\begin{\parsearg\beginxxx}
425 \expandafter\ifx\csname #1\endcsname\relax
426 {\errhelp=\EMsimple \errmessage{Undefined command @begin #1}}\else
427 \csname #1\endcsname\fi}
429 % @end foo executes the definition of \Efoo.
431 \def\end{\parsearg\endxxx}
433 \expandafter\ifx\csname E#1\endcsname\relax
436 % Everything's ok; the right environment has been started.
437 \csname E#1\endcsname
442 \expandafter\ifx\csname#1\endcsname\relax
443 % There's no \foo, i.e., no ``environment'' foo.
445 \errmessage{Undefined command `@end #1'}%
447 \unmatchedenderror{#1}%
451 % There is an environment #1, but it hasn't been started. Give an error.
453 \def\unmatchedenderror#1{%
455 \errmessage{This `@end #1' doesn't have a matching `@#1'}%
458 % Define the control sequence \E#1 to give an unmatched @end error.
460 \def\defineunmatchedend#1{%
461 \expandafter\def\csname E#1\endcsname{\unmatchedenderror{#1}}%
465 %% Simple single-character @ commands
468 % Kludge this until the fonts are right (grr).
471 % This is turned off because it was never documented
472 % and you can use @w{...} around a quote to suppress ligatures.
473 %% Define @` and @' to be the same as ` and '
474 %% but suppressing ligatures.
478 % Used to generate quoted braces.
479 \def\mylbrace {{\tt\char123}}
480 \def\myrbrace {{\tt\char125}}
484 % Definitions to produce \{ and \} commands for indices,
485 % and @{ and @} for the aux file.
486 \catcode`\{ = \other \catcode`\} = \other
487 \catcode`\[ = 1 \catcode`\] = 2
488 \catcode`\! = 0 \catcode`\\ = \other
491 !gdef!lbraceatcmd[@{]%
492 !gdef!rbraceatcmd[@}]%
495 % Accents: @, @dotaccent @ringaccent @ubaraccent @udotaccent
496 % Others are defined by plain TeX: @` @' @" @^ @~ @= @u @v @H.
499 \def\ringaccent#1{{\accent23 #1}}
504 % Other special characters: @questiondown @exclamdown
505 % Plain TeX defines: @AA @AE @O @OE @L (plus lowercase versions) @ss.
506 \def\questiondown{?`}
509 % Dotless i and dotless j, used for accents.
514 \ifx\temp\imacro \ptexi
515 \else\ifx\temp\jmacro \j
516 \else \errmessage{@dotless can be used only with i or j}%
520 % Be sure we're in horizontal mode when doing a tie, since we make space
521 % equivalent to this in @example-like environments. Otherwise, a space
522 % at the beginning of a line will start with \penalty -- and
523 % since \penalty is valid in vertical mode, we'd end up putting the
524 % penalty on the vertical list instead of in the new paragraph.
526 % Avoid using \@M directly, because that causes trouble
527 % if the definition is written into an index file.
528 \global\let\tiepenalty = \@M
529 \gdef\tie{\leavevmode\penalty\tiepenalty\ }
532 % @: forces normal size whitespace following.
533 \def\:{\spacefactor=1000 }
535 % @* forces a line break.
536 \def\*{\hfil\break\hbox{}\ignorespaces}
538 % @/ allows a line break.
541 % @. is an end-of-sentence period.
542 \def\.{.\spacefactor=3000 }
544 % @! is an end-of-sentence bang.
545 \def\!{!\spacefactor=3000 }
547 % @? is an end-of-sentence query.
548 \def\?{?\spacefactor=3000 }
550 % @w prevents a word break. Without the \leavevmode, @w at the
551 % beginning of a paragraph, when TeX is still in vertical mode, would
552 % produce a whole line of output instead of starting the paragraph.
553 \def\w#1{\leavevmode\hbox{#1}}
555 % @group ... @end group forces ... to be all on one page, by enclosing
556 % it in a TeX vbox. We use \vtop instead of \vbox to construct the box
557 % to keep its height that of a normal line. According to the rules for
558 % \topskip (p.114 of the TeXbook), the glue inserted is
559 % max (\topskip - \ht (first item), 0). If that height is large,
560 % therefore, no glue is inserted, and the space between the headline and
561 % the text is small, which looks bad.
563 % Another complication is that the group might be very large. This can
564 % cause the glue on the previous page to be unduly stretched, because it
565 % does not have much material. In this case, it's better to add an
566 % explicit \vfill so that the extra space is at the bottom. The
567 % threshold for doing this is if the group is more than \vfilllimit
568 % percent of a page (\vfilllimit can be changed inside of @tex).
573 \def\group{\begingroup
574 \ifnum\catcode13=\active \else
575 \errhelp = \groupinvalidhelp
576 \errmessage{@group invalid in context where filling is enabled}%
579 % The \vtop we start below produces a box with normal height and large
580 % depth; thus, TeX puts \baselineskip glue before it, and (when the
581 % next line of text is done) \lineskip glue after it. (See p.82 of
582 % the TeXbook.) Thus, space below is not quite equal to space
583 % above. But it's pretty close.
585 \egroup % End the \vtop.
586 % \dimen0 is the vertical size of the group's box.
587 \dimen0 = \ht\groupbox \advance\dimen0 by \dp\groupbox
588 % \dimen2 is how much space is left on the page (more or less).
589 \dimen2 = \pageheight \advance\dimen2 by -\pagetotal
590 % if the group doesn't fit on the current page, and it's a big big
591 % group, force a page break.
592 \ifdim \dimen0 > \dimen2
593 \ifdim \pagetotal < \vfilllimit\pageheight
598 \endgroup % End the \group.
601 \setbox\groupbox = \vtop\bgroup
602 % We have to put a strut on the last line in case the @group is in
603 % the midst of an example, rather than completely enclosing it.
604 % Otherwise, the interline space between the last line of the group
605 % and the first line afterwards is too small. But we can't put the
606 % strut in \Egroup, since there it would be on a line by itself.
607 % Hence this just inserts a strut at the beginning of each line.
608 \everypar = {\strut}%
610 % Since we have a strut on every line, we don't need any of TeX's
611 % normal interline spacing.
614 % OK, but now we have to do something about blank
615 % lines in the input in @example-like environments, which normally
616 % just turn into \lisppar, which will insert no space now that we've
617 % turned off the interline space. Simplest is to make them be an
620 \edef\par{\leavevmode \par}%
622 % Reset ^^M's definition to new definition of \par.
626 % Do @comment since we are called inside an environment such as
627 % @example, where each end-of-line in the input causes an
628 % end-of-line in the output. We don't want the end-of-line after
629 % the `@group' to put extra space in the output. Since @group
630 % should appear on a line by itself (according to the Texinfo
631 % manual), we don't worry about eating any user text.
635 % TeX puts in an \escapechar (i.e., `@') at the beginning of the help
636 % message, so this ends up printing `@group can only ...'.
638 \newhelp\groupinvalidhelp{%
639 group can only be used in environments such as @example,^^J%
640 where each line of input produces a line of output.}
642 % @need space-in-mils
643 % forces a page break if there is not space-in-mils remaining.
645 \newdimen\mil \mil=0.001in
647 \def\need{\parsearg\needx}
649 % Old definition--didn't work.
650 %\def\needx #1{\par %
651 %% This method tries to make TeX break the page naturally
652 %% if the depth of the box does not fit.
654 %\vtop to #1\mil{\vfil}\kern -#1\mil\nobreak
659 % Ensure vertical mode, so we don't make a big box in the middle of a
663 % If the @need value is less than one line space, it's useless.
665 \dimen2 = \ht\strutbox
666 \advance\dimen2 by \dp\strutbox
667 \ifdim\dimen0 > \dimen2
669 % Do a \strut just to make the height of this box be normal, so the
670 % normal leading is inserted relative to the preceding line.
671 % And a page break here is fine.
672 \vtop to #1\mil{\strut\vfil}%
674 % TeX does not even consider page breaks if a penalty added to the
675 % main vertical list is 10000 or more. But in order to see if the
676 % empty box we just added fits on the page, we must make it consider
677 % page breaks. On the other hand, we don't want to actually break the
678 % page after the empty box. So we use a penalty of 9999.
680 % There is an extremely small chance that TeX will actually break the
681 % page at this \penalty, if there are no other feasible breakpoints in
682 % sight. (If the user is using lots of big @group commands, which
683 % almost-but-not-quite fill up a page, TeX will have a hard time doing
684 % good page breaking, for example.) However, I could not construct an
685 % example where a page broke at this \penalty; if it happens in a real
686 % document, then we can reconsider our strategy.
689 % Back up by the size of the box, whether we did a page break or not.
692 % Do not allow a page break right after this kern.
697 % @br forces paragraph break
701 % @dots{} output an ellipsis using the current font.
702 % We do .5em per period so that it has the same spacing in a typewriter
703 % font as three actual period characters.
708 \hskip 0pt plus 0.25fil minus 0.25fil
710 \hskip 0pt plus 0.5fil minus 0.5fil
714 % @enddots{} is an end-of-sentence ellipsis.
719 \hskip 0pt plus 0.25fil minus 0.25fil
721 \hskip 0pt plus 0.5fil minus 0.5fil
726 % @page forces the start of a new page.
728 \def\page{\par\vfill\supereject}
731 % outputs text on separate line in roman font, starting at standard page margin
733 % This records the amount of indent in the innermost environment.
734 % That's how much \exdent should take out.
735 \newskip\exdentamount
737 % This defn is used inside fill environments such as @defun.
738 \def\exdent{\parsearg\exdentyyy}
739 \def\exdentyyy #1{{\hfil\break\hbox{\kern -\exdentamount{\rm#1}}\hfil\break}}
741 % This defn is used inside nofill environments such as @example.
742 \def\nofillexdent{\parsearg\nofillexdentyyy}
743 \def\nofillexdentyyy #1{{\advance \leftskip by -\exdentamount
744 \leftline{\hskip\leftskip{\rm#1}}}}
746 % @inmargin{WHICH}{TEXT} puts TEXT in the WHICH margin next to the current
747 % paragraph. For more general purposes, use the \margin insertion
748 % class. WHICH is `l' or `r'.
750 \newskip\inmarginspacing \inmarginspacing=1cm
751 \def\strutdepth{\dp\strutbox}
753 \def\doinmargin#1#2{\strut\vadjust{%
756 \vtop to \strutdepth{%
757 \baselineskip=\strutdepth
759 % if you have multiple lines of stuff to put here, you'll need to
760 % make the vbox yourself of the appropriate size.
762 \llap{\ignorespaces #2\hskip\inmarginspacing}%
764 \rlap{\hskip\hsize \hskip\inmarginspacing \ignorespaces #2}%
769 \def\inleftmargin{\doinmargin l}
770 \def\inrightmargin{\doinmargin r}
772 % @inmargin{TEXT [, RIGHT-TEXT]}
773 % (if RIGHT-TEXT is given, use TEXT for left page, RIGHT-TEXT for right;
774 % else use TEXT for both).
776 \def\inmargin#1{\parseinmargin #1,,\finish}
777 \def\parseinmargin#1,#2,#3\finish{% not perfect, but better than nothing.
778 \setbox0 = \hbox{\ignorespaces #2}%
780 \def\lefttext{#1}% have both texts
783 \def\lefttext{#1}% have only one text
788 \def\temp{\inrightmargin\righttext}% odd page -> outside is right margin
790 \def\temp{\inleftmargin\lefttext}%
795 % @include file insert text of that file as input.
796 % Allow normal characters that we make active in the argument (a file name).
797 \def\include{\begingroup
806 \parsearg\includezzz}
807 % Restore active chars for included file.
808 \def\includezzz#1{\endgroup\begingroup
809 % Read the included file in a group so nested @include's work.
811 \let\value=\expandablevalue
818 % outputs that line, centered.
820 \def\center{\parsearg\docenter}
822 \ifhmode \hfil\break \fi
823 \advance\hsize by -\leftskip
824 \advance\hsize by -\rightskip
825 \line{\hfil \ignorespaces#1\unskip \hfil}%
829 % @sp n outputs n lines of vertical space
831 \def\sp{\parsearg\spxxx}
832 \def\spxxx #1{\vskip #1\baselineskip}
834 % @comment ...line which is ignored...
835 % @c is the same as @comment
836 % @ignore ... @end ignore is another way to write a comment
838 \def\comment{\begingroup \catcode`\^^M=\other%
839 \catcode`\@=\other \catcode`\{=\other \catcode`\}=\other%
841 {\catcode`\^^M=\other \gdef\commentxxx#1^^M{\endgroup}}
845 % @paragraphindent NCHARS
846 % We'll use ems for NCHARS, close enough.
847 % NCHARS can also be the word `asis' or `none'.
848 % We cannot feasibly implement @paragraphindent asis, though.
850 \def\asisword{asis} % no translation, these are keywords
853 \def\paragraphindent{\parsearg\doparagraphindent}
854 \def\doparagraphindent#1{%
859 \defaultparindent = 0pt
861 \defaultparindent = #1em
864 \parindent = \defaultparindent
867 % @exampleindent NCHARS
868 % We'll use ems for NCHARS like @paragraphindent.
869 % It seems @exampleindent asis isn't necessary, but
870 % I preserve it to make it similar to @paragraphindent.
871 \def\exampleindent{\parsearg\doexampleindent}
872 \def\doexampleindent#1{%
879 \lispnarrowing = #1em
884 % @firstparagraphindent WORD
885 % If WORD is `none', then suppress indentation of the first paragraph
886 % after a section heading. If WORD is `insert', then do indent at such
889 % The paragraph indentation is suppressed or not by calling
890 % \suppressfirstparagraphindent, which the sectioning commands do.
891 % We switch the definition of this back and forth according to WORD.
892 % By default, we suppress indentation.
894 \def\suppressfirstparagraphindent{\dosuppressfirstparagraphindent}
895 \newdimen\currentparindent
897 \def\insertword{insert}
899 \def\firstparagraphindent{\parsearg\dofirstparagraphindent}
900 \def\dofirstparagraphindent#1{%
903 \let\suppressfirstparagraphindent = \dosuppressfirstparagraphindent
904 \else\ifx\temp\insertword
905 \let\suppressfirstparagraphindent = \relax
908 \errmessage{Unknown @firstparagraphindent option `\temp'}%
912 % Here is how we actually suppress indentation. Redefine \everypar to
913 % \kern backwards by \parindent, and then reset itself to empty.
915 % We also make \indent itself not actually do anything until the next
918 \gdef\dosuppressfirstparagraphindent{%
920 \restorefirstparagraphindent
924 \restorefirstparagraphindent
927 \global\everypar = {%
929 \restorefirstparagraphindent
933 \gdef\restorefirstparagraphindent{%
934 \global \let \indent = \ptexindent
935 \global \let \noindent = \ptexnoindent
936 \global \everypar = {}%
940 % @asis just yields its argument. Used with @table, for example.
944 % @math outputs its argument in math mode.
945 % We don't use $'s directly in the definition of \math because we need
946 % to set catcodes according to plain TeX first, to allow for subscripts,
947 % superscripts, special math chars, etc.
949 \let\implicitmath = $%$ font-lock fix
951 % One complication: _ usually means subscripts, but it could also mean
952 % an actual _ character, as in @math{@var{some_variable} + 1}. So make
953 % _ within @math be active (mathcode "8000), and distinguish by seeing
954 % if the current family is \slfam, which is what @var uses.
956 {\catcode\underChar = \active
957 \gdef\mathunderscore{%
958 \catcode\underChar=\active
959 \def_{\ifnum\fam=\slfam \_\else\sb\fi}%
962 % Another complication: we want \\ (and @\) to output a \ character.
963 % FYI, plain.tex uses \\ as a temporary control sequence (why?), but
964 % this is not advertised and we don't care. Texinfo does not
965 % otherwise define @\.
967 % The \mathchar is class=0=ordinary, family=7=ttfam, position=5C=\.
968 \def\mathbackslash{\ifnum\fam=\ttfam \mathchar"075C \else\backslash \fi}
972 \mathcode`\_="8000 \mathunderscore
973 \let\\ = \mathbackslash
975 \implicitmath\finishmath}
976 \def\finishmath#1{#1\implicitmath\Etex}
978 % Some active characters (such as <) are spaced differently in math.
979 % We have to reset their definitions in case the @math was an
980 % argument to a command which set the catcodes (such as @item or @section).
995 % @bullet and @minus need the same treatment as @math, just above.
996 \def\bullet{\implicitmath\ptexbullet\implicitmath}
997 \def\minus{\implicitmath-\implicitmath}
999 % @refill is a no-op.
1002 % If working on a large document in chapters, it is convenient to
1003 % be able to disable indexing, cross-referencing, and contents, for test runs.
1004 % This is done with @novalidate (before @setfilename).
1006 \newif\iflinks \linkstrue % by default we want the aux files.
1007 \let\novalidate = \linksfalse
1009 % @setfilename is done at the beginning of every texinfo file.
1010 % So open here the files we need to have open while reading the input.
1011 % This makes it possible to make a .fmt file for texinfo.
1015 \fi % \openindices needs to do some work in any case.
1017 \fixbackslash % Turn off hack to swallow `\input texinfo'.
1018 \global\let\setfilename=\comment % Ignore extra @setfilename cmds.
1020 % If texinfo.cnf is present on the system, read it.
1021 % Useful for site-wide @afourpaper, etc.
1022 % Just to be on the safe side, close the input stream before the \input.
1023 \openin 1 texinfo.cnf
1024 \ifeof1 \let\temp=\relax \else \def\temp{\input texinfo.cnf }\fi
1028 \comment % Ignore the actual filename.
1031 % Called from \setfilename.
1043 \outer\def\bye{\pagealignmacro\tracingstats=1\ptexend}
1047 % adobe `portable' document format
1051 \newcount\filenamelength
1060 \newif\ifpdfmakepagedest
1062 \ifx\pdfoutput\undefined
1064 \let\pdfmkdest = \gobble
1065 \let\pdfurl = \gobble
1066 \let\endlink = \relax
1067 \let\linkcolor = \relax
1068 \let\pdfmakeoutlines = \relax
1073 \pdfcatalog{/PageMode /UseOutlines}%
1074 \def\dopdfimage#1#2#3{%
1075 \def\imagewidth{#2}%
1076 \def\imageheight{#3}%
1077 % without \immediate, pdftex seg faults when the same image is
1078 % included twice. (Version 3.14159-pre-1.0-unofficial-20010704.)
1079 \ifnum\pdftexversion < 14
1082 \immediate\pdfximage
1084 \ifx\empty\imagewidth\else width \imagewidth \fi
1085 \ifx\empty\imageheight\else height \imageheight \fi
1086 \ifnum\pdftexversion<13
1091 \ifnum\pdftexversion < 14 \else
1092 \pdfrefximage \pdflastximage
1095 % We have to set dummies so commands such as @code in a section title
1098 \normalturnoffactive
1099 \pdfdest name{#1} xyz%
1102 \let\linkcolor = \Blue % was Cyan, but that seems light?
1103 \def\endlink{\Black\pdfendlink}
1104 % Adding outlines to PDF; macros for calculating structure of outlines
1105 % come from Petr Olsak
1106 \def\expnumber#1{\expandafter\ifx\csname#1\endcsname\relax 0%
1107 \else \csname#1\endcsname \fi}
1108 \def\advancenumber#1{\tempnum=\expnumber{#1}\relax
1109 \advance\tempnum by 1
1110 \expandafter\xdef\csname#1\endcsname{\the\tempnum}}
1112 % #1 is the section text. #2 is the pdf expression for the number
1113 % of subentries (or empty, for subsubsections). #3 is the node
1114 % text, which might be empty if this toc entry had no
1115 % corresponding node. #4 is the page number.
1117 \def\dopdfoutline#1#2#3#4{%
1118 % Generate a link to the node text if that exists; else, use the
1119 % page number. We could generate a destination for the section
1120 % text in the case where a section has no node, but it doesn't
1121 % seem worthwhile, since most documents are normally structured.
1122 \def\pdfoutlinedest{#3}%
1123 \ifx\pdfoutlinedest\empty \def\pdfoutlinedest{#4}\fi
1125 \pdfoutline goto name{\pdfmkpgn{\pdfoutlinedest}}#2{#1}%
1128 \def\pdfmakeoutlines{%
1129 \openin 1 \jobname.toc
1130 \ifeof 1\else\begingroup
1132 % Thanh's hack / proper braces in bookmarks
1133 \edef\mylbrace{\iftrue \string{\else}\fi}\let\{=\mylbrace
1134 \edef\myrbrace{\iffalse{\else\string}\fi}\let\}=\myrbrace
1136 % Read toc silently, to get counts of subentries for \pdfoutline.
1137 \def\numchapentry##1##2##3##4{\def\thischapnum{##2}}%
1138 \def\numsecentry##1##2##3##4{%
1139 \def\thissecnum{##2}%
1140 \advancenumber{chap\thischapnum}}%
1141 \def\numsubsecentry##1##2##3##4{%
1142 \def\thissubsecnum{##2}%
1143 \advancenumber{sec\thissecnum}}%
1144 \def\numsubsubsecentry##1##2##3##4{\advancenumber{subsec\thissubsecnum}}%
1146 % use \def rather than \let here because we redefine \chapentry et
1147 % al. a second time, below.
1148 \def\appentry{\numchapentry}%
1149 \def\appsecentry{\numsecentry}%
1150 \def\appsubsecentry{\numsubsecentry}%
1151 \def\appsubsubsecentry{\numsubsubsecentry}%
1152 \def\unnchapentry{\numchapentry}%
1153 \def\unnsecentry{\numsecentry}%
1154 \def\unnsubsecentry{\numsubsecentry}%
1155 \def\unnsubsubsecentry{\numsubsubsecentry}%
1158 % Read toc second time, this time actually producing the outlines.
1159 % The `-' means take the \expnumber as the absolute number of
1160 % subentries, which we calculated on our first read of the .toc above.
1162 % We use the node names as the destinations.
1163 \def\numchapentry##1##2##3##4{%
1164 \dopdfoutline{##1}{count-\expnumber{chap##2}}{##3}{##4}}%
1165 \def\numsecentry##1##2##3##4{%
1166 \dopdfoutline{##1}{count-\expnumber{sec##2}}{##3}{##4}}%
1167 \def\numsubsecentry##1##2##3##4{%
1168 \dopdfoutline{##1}{count-\expnumber{subsec##2}}{##3}{##4}}%
1169 \def\numsubsubsecentry##1##2##3##4{% count is always zero
1170 \dopdfoutline{##1}{}{##3}{##4}}%
1172 % Make special characters normal for writing to the pdf file.
1179 \def\makelinks #1,{%
1180 \def\params{#1}\def\E{END}%
1182 \let\nextmakelinks=\relax
1184 \let\nextmakelinks=\makelinks
1185 \ifnum\lnkcount>0,\fi
1187 \startlink attr{/Border [0 0 0]}
1188 goto name{\pdfmkpgn{\the\pgn}}%
1190 \advance\lnkcount by 1%
1195 \def\picknum#1{\expandafter\pn#1}
1206 \def\ppn#1{\pgn=#1\gobble}
1207 \def\ppnn{\pgn=\first}
1208 \def\pdfmklnk#1{\lnkcount=0\makelinks #1,END,}
1209 \def\addtokens#1#2{\edef\addtoks{\noexpand#1={\the#1#2}}\addtoks}
1210 \def\skipspaces#1{\def\PP{#1}\def\D{|}%
1211 \ifx\PP\D\let\nextsp\relax
1212 \else\let\nextsp\skipspaces
1213 \ifx\p\space\else\addtokens{\filename}{\PP}%
1214 \advance\filenamelength by 1
1218 \def\getfilename#1{\filenamelength=0\expandafter\skipspaces#1|\relax}
1219 \ifnum\pdftexversion < 14
1220 \let \startlink \pdfannotlink
1222 \let \startlink \pdfstartlink
1226 \normalturnoffactive\def\@{@}%
1227 \let\value=\expandablevalue
1229 \startlink attr{/Border [0 0 0]}%
1230 user{/Subtype /Link /A << /S /URI /URI (#1) >>}%
1233 \def\pdfgettoks#1.{\setbox\boxA=\hbox{\toksA={#1.}\toksB={}\maketoks}}
1234 \def\addtokens#1#2{\edef\addtoks{\noexpand#1={\the#1#2}}\addtoks}
1235 \def\adn#1{\addtokens{\toksC}{#1}\global\countA=1\let\next=\maketoks}
1236 \def\poptoks#1#2|ENDTOKS|{\let\first=#1\toksD={#1}\toksA={#2}}
1238 \expandafter\poptoks\the\toksA|ENDTOKS|
1240 \else\ifx\first1\adn1 \else\ifx\first2\adn2 \else\ifx\first3\adn3
1241 \else\ifx\first4\adn4 \else\ifx\first5\adn5 \else\ifx\first6\adn6
1242 \else\ifx\first7\adn7 \else\ifx\first8\adn8 \else\ifx\first9\adn9
1244 \ifnum0=\countA\else\makelink\fi
1245 \ifx\first.\let\next=\done\else
1247 \addtokens{\toksB}{\the\toksD}
1248 \ifx\first,\addtokens{\toksB}{\space}\fi
1250 \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
1252 \def\makelink{\addtokens{\toksB}%
1253 {\noexpand\pdflink{\the\toksC}}\toksC={}\global\countA=0}
1255 \startlink attr{/Border [0 0 0]} goto name{\pdfmkpgn{#1}}
1256 \linkcolor #1\endlink}
1257 \def\done{\edef\st{\global\noexpand\toksA={\the\toksB}}\st}
1258 \fi % \ifx\pdfoutput
1262 % Font-change commands.
1264 % Texinfo sort of supports the sans serif font style, which plain TeX does not.
1265 % So we set up a \sf analogous to plain's \rm, etc.
1267 \def\sf{\fam=\sffam \tensf}
1268 \let\li = \sf % Sometimes we call it \li, not \sf.
1270 % We don't need math for this one.
1274 \newdimen\textleading \textleading = 13.2pt
1276 % Set the baselineskip to #1, and the lineskip and strut size
1277 % correspondingly. There is no deep meaning behind these magic numbers
1278 % used as factors; they just match (closely enough) what Knuth defined.
1280 \def\lineskipfactor{.08333}
1281 \def\strutheightpercent{.70833}
1282 \def\strutdepthpercent {.29167}
1285 \normalbaselineskip = #1\relax
1286 \normallineskip = \lineskipfactor\normalbaselineskip
1288 \setbox\strutbox =\hbox{%
1289 \vrule width0pt height\strutheightpercent\baselineskip
1290 depth \strutdepthpercent \baselineskip
1294 % Set the font macro #1 to the font named #2, adding on the
1295 % specified font prefix (normally `cm').
1296 % #3 is the font's design size, #4 is a scale factor
1297 \def\setfont#1#2#3#4{\font#1=\fontprefix#2#3 scaled #4}
1299 % Use cm as the default font prefix.
1300 % To specify the font prefix, you must define \fontprefix
1301 % before you read in texinfo.tex.
1302 \ifx\fontprefix\undefined
1305 % Support font families that don't use the same naming scheme as CM.
1307 \def\rmbshape{bx} %where the normal face is bold
1312 \def\ttslshape{sltt}
1322 \newcount\mainmagstep
1324 % not really supported.
1325 \mainmagstep=\magstep1
1326 \setfont\textrm\rmshape{12}{1000}
1327 \setfont\texttt\ttshape{12}{1000}
1329 \mainmagstep=\magstephalf
1330 \setfont\textrm\rmshape{10}{\mainmagstep}
1331 \setfont\texttt\ttshape{10}{\mainmagstep}
1333 \setfont\textbf\bfshape{10}{\mainmagstep}
1334 \setfont\textit\itshape{10}{\mainmagstep}
1335 \setfont\textsl\slshape{10}{\mainmagstep}
1336 \setfont\textsf\sfshape{10}{\mainmagstep}
1337 \setfont\textsc\scshape{10}{\mainmagstep}
1338 \setfont\textttsl\ttslshape{10}{\mainmagstep}
1339 \font\texti=cmmi10 scaled \mainmagstep
1340 \font\textsy=cmsy10 scaled \mainmagstep
1342 % A few fonts for @defun, etc.
1343 \setfont\defbf\bfshape{10}{\magstep1}
1344 \setfont\deftt\ttshape{10}{\magstep1}
1345 \def\df{\let\tentt=\deftt \let\tenbf = \defbf \bf}
1347 % Fonts for indices, footnotes, small examples (9pt).
1348 \setfont\smallrm\rmshape{9}{1000}
1349 \setfont\smalltt\ttshape{9}{1000}
1350 \setfont\smallbf\bfshape{10}{900}
1351 \setfont\smallit\itshape{9}{1000}
1352 \setfont\smallsl\slshape{9}{1000}
1353 \setfont\smallsf\sfshape{9}{1000}
1354 \setfont\smallsc\scshape{10}{900}
1355 \setfont\smallttsl\ttslshape{10}{900}
1359 % Fonts for small examples (8pt).
1360 \setfont\smallerrm\rmshape{8}{1000}
1361 \setfont\smallertt\ttshape{8}{1000}
1362 \setfont\smallerbf\bfshape{10}{800}
1363 \setfont\smallerit\itshape{8}{1000}
1364 \setfont\smallersl\slshape{8}{1000}
1365 \setfont\smallersf\sfshape{8}{1000}
1366 \setfont\smallersc\scshape{10}{800}
1367 \setfont\smallerttsl\ttslshape{10}{800}
1368 \font\smalleri=cmmi8
1369 \font\smallersy=cmsy8
1371 % Fonts for title page:
1372 \setfont\titlerm\rmbshape{12}{\magstep3}
1373 \setfont\titleit\itbshape{10}{\magstep4}
1374 \setfont\titlesl\slbshape{10}{\magstep4}
1375 \setfont\titlett\ttbshape{12}{\magstep3}
1376 \setfont\titlettsl\ttslshape{10}{\magstep4}
1377 \setfont\titlesf\sfbshape{17}{\magstep1}
1378 \let\titlebf=\titlerm
1379 \setfont\titlesc\scbshape{10}{\magstep4}
1380 \font\titlei=cmmi12 scaled \magstep3
1381 \font\titlesy=cmsy10 scaled \magstep4
1382 \def\authorrm{\secrm}
1383 \def\authortt{\sectt}
1385 % Chapter (and unnumbered) fonts (17.28pt).
1386 \setfont\chaprm\rmbshape{12}{\magstep2}
1387 \setfont\chapit\itbshape{10}{\magstep3}
1388 \setfont\chapsl\slbshape{10}{\magstep3}
1389 \setfont\chaptt\ttbshape{12}{\magstep2}
1390 \setfont\chapttsl\ttslshape{10}{\magstep3}
1391 \setfont\chapsf\sfbshape{17}{1000}
1393 \setfont\chapsc\scbshape{10}{\magstep3}
1394 \font\chapi=cmmi12 scaled \magstep2
1395 \font\chapsy=cmsy10 scaled \magstep3
1397 % Section fonts (14.4pt).
1398 \setfont\secrm\rmbshape{12}{\magstep1}
1399 \setfont\secit\itbshape{10}{\magstep2}
1400 \setfont\secsl\slbshape{10}{\magstep2}
1401 \setfont\sectt\ttbshape{12}{\magstep1}
1402 \setfont\secttsl\ttslshape{10}{\magstep2}
1403 \setfont\secsf\sfbshape{12}{\magstep1}
1405 \setfont\secsc\scbshape{10}{\magstep2}
1406 \font\seci=cmmi12 scaled \magstep1
1407 \font\secsy=cmsy10 scaled \magstep2
1409 % Subsection fonts (13.15pt).
1410 \setfont\ssecrm\rmbshape{12}{\magstephalf}
1411 \setfont\ssecit\itbshape{10}{1315}
1412 \setfont\ssecsl\slbshape{10}{1315}
1413 \setfont\ssectt\ttbshape{12}{\magstephalf}
1414 \setfont\ssecttsl\ttslshape{10}{1315}
1415 \setfont\ssecsf\sfbshape{12}{\magstephalf}
1417 \setfont\ssecsc\scbshape{10}{\magstep1}
1418 \font\sseci=cmmi12 scaled \magstephalf
1419 \font\ssecsy=cmsy10 scaled 1315
1420 % The smallcaps and symbol fonts should actually be scaled \magstep1.5,
1421 % but that is not a standard magnification.
1423 % In order for the font changes to affect most math symbols and letters,
1424 % we have to define the \textfont of the standard families. Since
1425 % texinfo doesn't allow for producing subscripts and superscripts except
1426 % in the main text, we don't bother to reset \scriptfont and
1427 % \scriptscriptfont (which would also require loading a lot more fonts).
1429 \def\resetmathfonts{%
1430 \textfont0=\tenrm \textfont1=\teni \textfont2=\tensy
1431 \textfont\itfam=\tenit \textfont\slfam=\tensl \textfont\bffam=\tenbf
1432 \textfont\ttfam=\tentt \textfont\sffam=\tensf
1435 % The font-changing commands redefine the meanings of \tenSTYLE, instead
1436 % of just \STYLE. We do this so that font changes will continue to work
1437 % in math mode, where it is the current \fam that is relevant in most
1438 % cases, not the current font. Plain TeX does \def\bf{\fam=\bffam
1439 % \tenbf}, for example. By redefining \tenbf, we obviate the need to
1440 % redefine \bf itself.
1442 \let\tenrm=\textrm \let\tenit=\textit \let\tensl=\textsl
1443 \let\tenbf=\textbf \let\tentt=\texttt \let\smallcaps=\textsc
1444 \let\tensf=\textsf \let\teni=\texti \let\tensy=\textsy \let\tenttsl=\textttsl
1445 \resetmathfonts \setleading{\textleading}}
1447 \let\tenrm=\titlerm \let\tenit=\titleit \let\tensl=\titlesl
1448 \let\tenbf=\titlebf \let\tentt=\titlett \let\smallcaps=\titlesc
1449 \let\tensf=\titlesf \let\teni=\titlei \let\tensy=\titlesy
1450 \let\tenttsl=\titlettsl
1451 \resetmathfonts \setleading{25pt}}
1452 \def\titlefont#1{{\titlefonts\rm #1}}
1454 \let\tenrm=\chaprm \let\tenit=\chapit \let\tensl=\chapsl
1455 \let\tenbf=\chapbf \let\tentt=\chaptt \let\smallcaps=\chapsc
1456 \let\tensf=\chapsf \let\teni=\chapi \let\tensy=\chapsy \let\tenttsl=\chapttsl
1457 \resetmathfonts \setleading{19pt}}
1459 \let\tenrm=\secrm \let\tenit=\secit \let\tensl=\secsl
1460 \let\tenbf=\secbf \let\tentt=\sectt \let\smallcaps=\secsc
1461 \let\tensf=\secsf \let\teni=\seci \let\tensy=\secsy \let\tenttsl=\secttsl
1462 \resetmathfonts \setleading{16pt}}
1464 \let\tenrm=\ssecrm \let\tenit=\ssecit \let\tensl=\ssecsl
1465 \let\tenbf=\ssecbf \let\tentt=\ssectt \let\smallcaps=\ssecsc
1466 \let\tensf=\ssecsf \let\teni=\sseci \let\tensy=\ssecsy \let\tenttsl=\ssecttsl
1467 \resetmathfonts \setleading{15pt}}
1468 \let\subsubsecfonts = \subsecfonts % Maybe make sssec fonts scaled magstephalf?
1470 \let\tenrm=\smallrm \let\tenit=\smallit \let\tensl=\smallsl
1471 \let\tenbf=\smallbf \let\tentt=\smalltt \let\smallcaps=\smallsc
1472 \let\tensf=\smallsf \let\teni=\smalli \let\tensy=\smallsy
1473 \let\tenttsl=\smallttsl
1474 \resetmathfonts \setleading{10.5pt}}
1476 \let\tenrm=\smallerrm \let\tenit=\smallerit \let\tensl=\smallersl
1477 \let\tenbf=\smallerbf \let\tentt=\smallertt \let\smallcaps=\smallersc
1478 \let\tensf=\smallersf \let\teni=\smalleri \let\tensy=\smallersy
1479 \let\tenttsl=\smallerttsl
1480 \resetmathfonts \setleading{9.5pt}}
1482 % Set the fonts to use with the @small... environments.
1483 \let\smallexamplefonts = \smallfonts
1485 % About \smallexamplefonts. If we use \smallfonts (9pt), @smallexample
1486 % can fit this many characters:
1487 % 8.5x11=86 smallbook=72 a4=90 a5=69
1488 % If we use \smallerfonts (8pt), then we can fit this many characters:
1489 % 8.5x11=90+ smallbook=80 a4=90+ a5=77
1490 % For me, subjectively, the few extra characters that fit aren't worth
1491 % the additional smallness of 8pt. So I'm making the default 9pt.
1493 % By the way, for comparison, here's what fits with @example (10pt):
1494 % 8.5x11=71 smallbook=60 a4=75 a5=58
1496 % I wish we used A4 paper on this side of the Atlantic.
1501 % Set up the default fonts, so we can use them for creating boxes.
1505 % Define these so they can be easily changed for other fonts.
1506 \def\angleleft{$\langle$}
1507 \def\angleright{$\rangle$}
1509 % Count depth in font-changes, for error checks
1510 \newcount\fontdepth \fontdepth=0
1512 % Fonts for short table of contents.
1513 \setfont\shortcontrm\rmshape{12}{1000}
1514 \setfont\shortcontbf\bfshape{10}{\magstep1} % no cmb12
1515 \setfont\shortcontsl\slshape{12}{1000}
1516 \setfont\shortconttt\ttshape{12}{1000}
1518 %% Add scribe-like font environments, plus @l for inline lisp (usually sans
1519 %% serif) and @ii for TeX italic
1521 % \smartitalic{ARG} outputs arg in italics, followed by an italic correction
1522 % unless the following character is such as not to need one.
1523 \def\smartitalicx{\ifx\next,\else\ifx\next-\else\ifx\next.\else
1524 \ptexslash\fi\fi\fi}
1525 \def\smartslanted#1{{\ifusingtt\ttsl\sl #1}\futurelet\next\smartitalicx}
1526 \def\smartitalic#1{{\ifusingtt\ttsl\it #1}\futurelet\next\smartitalicx}
1529 \let\var=\smartslanted
1530 \let\dfn=\smartslanted
1531 \let\emph=\smartitalic
1532 \let\cite=\smartslanted
1537 % We can't just use \exhyphenpenalty, because that only has effect at
1538 % the end of a paragraph. Restore normal hyphenation at the end of the
1539 % group within which \nohyphenation is presumably called.
1541 \def\nohyphenation{\hyphenchar\font = -1 \aftergroup\restorehyphenation}
1542 \def\restorehyphenation{\hyphenchar\font = `- }
1544 % Set sfcode to normal for the chars that usually have another value.
1545 % Can't use plain's \frenchspacing because it uses the `\x notation, and
1546 % sometimes \x has an active definition that messes things up.
1549 \def\frenchspacing{%
1550 \sfcode\dotChar =\@m \sfcode\questChar=\@m \sfcode\exclamChar=\@m
1551 \sfcode\colonChar=\@m \sfcode\semiChar =\@m \sfcode\commaChar =\@m
1556 {\tt \rawbackslash \frenchspacing #1}%
1560 \def\samp#1{`\tclose{#1}'\null}
1561 \setfont\keyrm\rmshape{8}{1000}
1563 \def\key#1{{\keyrm\textfont2=\keysy \leavevmode\hbox{%
1564 \raise0.4pt\hbox{\angleleft}\kern-.08em\vtop{%
1565 \vbox{\hrule\kern-0.4pt
1566 \hbox{\raise0.4pt\hbox{\vphantom{\angleleft}}#1}}%
1568 \kern-.06em\raise0.4pt\hbox{\angleright}}}}
1569 % The old definition, with no lozenge:
1570 %\def\key #1{{\ttsl \nohyphenation \uppercase{#1}}\null}
1571 \def\ctrl #1{{\tt \rawbackslash \hat}#1}
1573 % @file, @option are the same as @samp.
1577 % @code is a modification of @t,
1578 % which makes spaces the same size as normal in the surrounding text.
1581 % Change normal interword space to be same as for the current font.
1582 \spaceskip = \fontdimen2\font
1584 % Switch to typewriter.
1587 % But `\ ' produces the large typewriter interword space.
1588 \def\ {{\spaceskip = 0pt{} }}%
1590 % Turn off hyphenation.
1600 % We *must* turn on hyphenation at `-' and `_' in \code.
1601 % Otherwise, it is too hard to avoid overfull hboxes
1602 % in the Emacs manual, the Library manual, etc.
1604 % Unfortunately, TeX uses one parameter (\hyphenchar) to control
1605 % both hyphenation at - and hyphenation within words.
1606 % We must therefore turn them both off (\tclose does that)
1607 % and arrange explicitly to hyphenate at a dash.
1613 \global\def\code{\begingroup
1614 \catcode`\-=\active \let-\codedash
1615 \catcode`\_=\active \let_\codeunder
1619 % If we end up with any active - characters when handling the index,
1620 % just treat them as a normal -.
1621 \global\def\indexbreaks{\catcode`\-=\active \let-\realdash}
1625 \def\codedash{-\discretionary{}{}{}}
1627 % this is all so @math{@code{var_name}+1} can work. In math mode, _
1628 % is "active" (mathcode"8000) and \normalunderscore (or \char95, etc.)
1629 % will therefore expand the active definition of _, which is us
1630 % (inside @code that is), therefore an endless loop.
1632 \mathchar"075F % class 0=ordinary, family 7=ttfam, pos 0x5F=_.
1633 \else\normalunderscore \fi
1634 \discretionary{}{}{}}%
1637 \def\codex #1{\tclose{#1}\endgroup}
1639 % @kbd is like @code, except that if the argument is just one @key command,
1640 % then @kbd has no effect.
1642 % @kbdinputstyle -- arg is `distinct' (@kbd uses slanted tty font always),
1643 % `example' (@kbd uses ttsl only inside of @example and friends),
1644 % or `code' (@kbd uses normal tty font always).
1645 \def\kbdinputstyle{\parsearg\kbdinputstylexxx}
1646 \def\kbdinputstylexxx#1{%
1648 \ifx\arg\worddistinct
1649 \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\ttsl}%
1650 \else\ifx\arg\wordexample
1651 \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\tt}%
1652 \else\ifx\arg\wordcode
1653 \gdef\kbdexamplefont{\tt}\gdef\kbdfont{\tt}%
1655 \errhelp = \EMsimple
1656 \errmessage{Unknown @kbdinputstyle option `\arg'}%
1659 \def\worddistinct{distinct}
1660 \def\wordexample{example}
1663 % Default is `distinct.'
1664 \kbdinputstyle distinct
1667 \def\kbdfoo#1#2#3\par{\def\one{#1}\def\three{#3}\def\threex{??}%
1668 \ifx\one\xkey\ifx\threex\three \key{#2}%
1669 \else{\tclose{\kbdfont\look}}\fi
1670 \else{\tclose{\kbdfont\look}}\fi}
1672 % For @url, @env, @command quotes seem unnecessary, so use \code.
1677 % @uref (abbreviation for `urlref') takes an optional (comma-separated)
1678 % second argument specifying the text to display and an optional third
1679 % arg as text to display instead of (rather than in addition to) the url
1680 % itself. First (mandatory) arg is the url. Perhaps eventually put in
1681 % a hypertex \special here.
1683 \def\uref#1{\douref #1,,,\finish}
1684 \def\douref#1,#2,#3,#4\finish{\begingroup
1687 \setbox0 = \hbox{\ignorespaces #3}%
1689 \unhbox0 % third arg given, show only that
1691 \setbox0 = \hbox{\ignorespaces #2}%
1694 \unhbox0 % PDF: 2nd arg given, show only it
1696 \unhbox0\ (\code{#1})% DVI: 2nd arg given, show both it and url
1699 \code{#1}% only url given, so show it
1705 % rms does not like angle brackets --karl, 17may97.
1706 % So now @email is just like @uref, unless we are pdf.
1708 %\def\email#1{\angleleft{\tt #1}\angleright}
1710 \def\email#1{\doemail#1,,\finish}
1711 \def\doemail#1,#2,#3\finish{\begingroup
1714 \setbox0 = \hbox{\ignorespaces #2}%
1715 \ifdim\wd0>0pt\unhbox0\else\code{#1}\fi
1722 % Check if we are currently using a typewriter font. Since all the
1723 % Computer Modern typewriter fonts have zero interword stretch (and
1724 % shrink), and it is reasonable to expect all typewriter fonts to have
1725 % this property, we can check that font parameter.
1727 \def\ifmonospace{\ifdim\fontdimen3\font=0pt }
1729 % Typeset a dimension, e.g., `in' or `pt'. The only reason for the
1730 % argument is to make the input look right: @dmn{pt} instead of @dmn{}pt.
1732 \def\dmn#1{\thinspace #1}
1734 \def\kbd#1{\def\look{#1}\expandafter\kbdfoo\look??\par}
1736 % @l was never documented to mean ``switch to the Lisp font'',
1737 % and it is not used as such in any manual I can find. We need it for
1738 % Polish suppressed-l. --karl, 22sep96.
1739 %\def\l#1{{\li #1}\null}
1741 % Explicit font changes: @r, @sc, undocumented @ii.
1742 \def\r#1{{\rm #1}} % roman font
1743 \def\sc#1{{\smallcaps#1}} % smallcaps font
1744 \def\ii#1{{\it #1}} % italic font
1746 % @acronym downcases the argument and prints in smallcaps.
1747 % It would be nicer to go one point size down.
1748 \def\acronym#1{{\smallcaps \lowercase{#1}}}
1750 % @pounds{} is a sterling sign.
1751 \def\pounds{{\it\$}}
1753 % @registeredsymbol - R in a circle. For now, only works in text size;
1754 % we'd have to redo the font mechanism to change the \scriptstyle and
1755 % \scriptscriptstyle font sizes to make it look right in headings.
1756 % Adapted from the plain.tex definition of \copyright.
1758 \def\registeredsymbol{%
1759 $^{{\ooalign{\hfil\raise.07ex\hbox{$\scriptstyle\rm R$}\hfil\crcr\Orb}}%
1764 \message{page headings,}
1766 \newskip\titlepagetopglue \titlepagetopglue = 1.5in
1767 \newskip\titlepagebottomglue \titlepagebottomglue = 2pc
1769 % First the title page. Must do @settitle before @titlepage.
1771 \newif\iffinishedtitlepage
1773 % Do an implicit @contents or @shortcontents after @end titlepage if the
1774 % user says @setcontentsaftertitlepage or @setshortcontentsaftertitlepage.
1776 \newif\ifsetcontentsaftertitlepage
1777 \let\setcontentsaftertitlepage = \setcontentsaftertitlepagetrue
1778 \newif\ifsetshortcontentsaftertitlepage
1779 \let\setshortcontentsaftertitlepage = \setshortcontentsaftertitlepagetrue
1781 \def\shorttitlepage{\parsearg\shorttitlepagezzz}
1782 \def\shorttitlepagezzz #1{\begingroup\hbox{}\vskip 1.5in \chaprm \centerline{#1}%
1783 \endgroup\page\hbox{}\page}
1785 \def\titlepage{\begingroup \parindent=0pt \textfonts
1786 \let\subtitlerm=\tenrm
1787 \def\subtitlefont{\subtitlerm \normalbaselineskip = 13pt \normalbaselines}%
1789 \def\authorfont{\authorrm \normalbaselineskip = 16pt \normalbaselines
1792 % Leave some space at the very top of the page.
1793 \vglue\titlepagetopglue
1795 % Now you can print the title using @title.
1796 \def\title{\parsearg\titlezzz}%
1797 \def\titlezzz##1{\leftline{\titlefonts\rm ##1}
1798 % print a rule at the page bottom also.
1799 \finishedtitlepagefalse
1800 \vskip4pt \hrule height 4pt width \hsize \vskip4pt}%
1801 % No rule at page bottom unless we print one at the top with @title.
1802 \finishedtitlepagetrue
1804 % Now you can put text using @subtitle.
1805 \def\subtitle{\parsearg\subtitlezzz}%
1806 \def\subtitlezzz##1{{\subtitlefont \rightline{##1}}}%
1808 % @author should come last, but may come many times.
1809 \def\author{\parsearg\authorzzz}%
1810 \def\authorzzz##1{\ifseenauthor\else\vskip 0pt plus 1filll\seenauthortrue\fi
1811 {\authorfont \leftline{##1}}}%
1813 % Most title ``pages'' are actually two pages long, with space
1814 % at the top of the second. We don't want the ragged left on the second.
1815 \let\oldpage = \page
1817 \iffinishedtitlepage\else
1821 \let\page = \oldpage
1823 % \def\page{\oldpage \hbox{}}
1827 \iffinishedtitlepage\else
1830 % It is important to do the page break before ending the group,
1831 % because the headline and footline are only empty inside the group.
1832 % If we use the new definition of \page, we always get a blank page
1833 % after the title page, which we certainly don't want.
1837 % Need this before the \...aftertitlepage checks so that if they are
1838 % in effect the toc pages will come out with page numbers.
1841 % If they want short, they certainly want long too.
1842 \ifsetshortcontentsaftertitlepage
1845 \global\let\shortcontents = \relax
1846 \global\let\contents = \relax
1849 \ifsetcontentsaftertitlepage
1851 \global\let\contents = \relax
1852 \global\let\shortcontents = \relax
1856 \def\finishtitlepage{%
1857 \vskip4pt \hrule height 2pt width \hsize
1858 \vskip\titlepagebottomglue
1859 \finishedtitlepagetrue
1862 %%% Set up page headings and footings.
1864 \let\thispage=\folio
1866 \newtoks\evenheadline % headline on even pages
1867 \newtoks\oddheadline % headline on odd pages
1868 \newtoks\evenfootline % footline on even pages
1869 \newtoks\oddfootline % footline on odd pages
1871 % Now make Tex use those variables
1872 \headline={{\textfonts\rm \ifodd\pageno \the\oddheadline
1873 \else \the\evenheadline \fi}}
1874 \footline={{\textfonts\rm \ifodd\pageno \the\oddfootline
1875 \else \the\evenfootline \fi}\HEADINGShook}
1876 \let\HEADINGShook=\relax
1878 % Commands to set those variables.
1879 % For example, this is what @headings on does
1880 % @evenheading @thistitle|@thispage|@thischapter
1881 % @oddheading @thischapter|@thispage|@thistitle
1882 % @evenfooting @thisfile||
1883 % @oddfooting ||@thisfile
1885 \def\evenheading{\parsearg\evenheadingxxx}
1886 \def\oddheading{\parsearg\oddheadingxxx}
1887 \def\everyheading{\parsearg\everyheadingxxx}
1889 \def\evenfooting{\parsearg\evenfootingxxx}
1890 \def\oddfooting{\parsearg\oddfootingxxx}
1891 \def\everyfooting{\parsearg\everyfootingxxx}
1895 \gdef\evenheadingxxx #1{\evenheadingyyy #1@|@|@|@|\finish}
1896 \gdef\evenheadingyyy #1@|#2@|#3@|#4\finish{%
1897 \global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
1899 \gdef\oddheadingxxx #1{\oddheadingyyy #1@|@|@|@|\finish}
1900 \gdef\oddheadingyyy #1@|#2@|#3@|#4\finish{%
1901 \global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
1903 \gdef\everyheadingxxx#1{\oddheadingxxx{#1}\evenheadingxxx{#1}}%
1905 \gdef\evenfootingxxx #1{\evenfootingyyy #1@|@|@|@|\finish}
1906 \gdef\evenfootingyyy #1@|#2@|#3@|#4\finish{%
1907 \global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
1909 \gdef\oddfootingxxx #1{\oddfootingyyy #1@|@|@|@|\finish}
1910 \gdef\oddfootingyyy #1@|#2@|#3@|#4\finish{%
1911 \global\oddfootline = {\rlap{\centerline{#2}}\line{#1\hfil#3}}%
1913 % Leave some space for the footline. Hopefully ok to assume
1914 % @evenfooting will not be used by itself.
1915 \global\advance\pageheight by -\baselineskip
1916 \global\advance\vsize by -\baselineskip
1919 \gdef\everyfootingxxx#1{\oddfootingxxx{#1}\evenfootingxxx{#1}}
1921 }% unbind the catcode of @.
1923 % @headings double turns headings on for double-sided printing.
1924 % @headings single turns headings on for single-sided printing.
1925 % @headings off turns them off.
1926 % @headings on same as @headings double, retained for compatibility.
1927 % @headings after turns on double-sided headings after this page.
1928 % @headings doubleafter turns on double-sided headings after this page.
1929 % @headings singleafter turns on single-sided headings after this page.
1930 % By default, they are off at the start of a document,
1931 % and turned `on' after @end titlepage.
1933 \def\headings #1 {\csname HEADINGS#1\endcsname}
1936 \global\evenheadline={\hfil} \global\evenfootline={\hfil}
1937 \global\oddheadline={\hfil} \global\oddfootline={\hfil}}
1939 % When we turn headings on, set the page number to 1.
1940 % For double-sided printing, put current file name in lower left corner,
1941 % chapter name on inside top of right hand pages, document
1942 % title on inside top of left hand pages, and page numbers on outside top
1943 % edge of all pages.
1944 \def\HEADINGSdouble{
1946 \global\evenfootline={\hfil}
1947 \global\oddfootline={\hfil}
1948 \global\evenheadline={\line{\folio\hfil\thistitle}}
1949 \global\oddheadline={\line{\thischapter\hfil\folio}}
1950 \global\let\contentsalignmacro = \chapoddpage
1952 \let\contentsalignmacro = \chappager
1954 % For single-sided printing, chapter title goes across top left of page,
1955 % page number on top right.
1956 \def\HEADINGSsingle{
1958 \global\evenfootline={\hfil}
1959 \global\oddfootline={\hfil}
1960 \global\evenheadline={\line{\thischapter\hfil\folio}}
1961 \global\oddheadline={\line{\thischapter\hfil\folio}}
1962 \global\let\contentsalignmacro = \chappager
1964 \def\HEADINGSon{\HEADINGSdouble}
1966 \def\HEADINGSafter{\let\HEADINGShook=\HEADINGSdoublex}
1967 \let\HEADINGSdoubleafter=\HEADINGSafter
1968 \def\HEADINGSdoublex{%
1969 \global\evenfootline={\hfil}
1970 \global\oddfootline={\hfil}
1971 \global\evenheadline={\line{\folio\hfil\thistitle}}
1972 \global\oddheadline={\line{\thischapter\hfil\folio}}
1973 \global\let\contentsalignmacro = \chapoddpage
1976 \def\HEADINGSsingleafter{\let\HEADINGShook=\HEADINGSsinglex}
1977 \def\HEADINGSsinglex{%
1978 \global\evenfootline={\hfil}
1979 \global\oddfootline={\hfil}
1980 \global\evenheadline={\line{\thischapter\hfil\folio}}
1981 \global\oddheadline={\line{\thischapter\hfil\folio}}
1982 \global\let\contentsalignmacro = \chappager
1985 % Subroutines used in generating headings
1986 % This produces Day Month Year style of output.
1987 % Only define if not already defined, in case a txi-??.tex file has set
1988 % up a different format (e.g., txi-cs.tex does this).
1989 \ifx\today\undefined
1993 \or\putwordMJan\or\putwordMFeb\or\putwordMMar\or\putwordMApr
1994 \or\putwordMMay\or\putwordMJun\or\putwordMJul\or\putwordMAug
1995 \or\putwordMSep\or\putwordMOct\or\putwordMNov\or\putwordMDec
2000 % @settitle line... specifies the title of the document, for headings.
2001 % It generates no output of its own.
2002 \def\thistitle{\putwordNoTitle}
2003 \def\settitle{\parsearg\settitlezzz}
2004 \def\settitlezzz #1{\gdef\thistitle{#1}}
2008 % Tables -- @table, @ftable, @vtable, @item(x), @kitem(x), @xitem(x).
2010 % default indentation of table text
2011 \newdimen\tableindent \tableindent=.8in
2012 % default indentation of @itemize and @enumerate text
2013 \newdimen\itemindent \itemindent=.3in
2014 % margin between end of table item and start of table text.
2015 \newdimen\itemmargin \itemmargin=.1in
2017 % used internally for \itemindent minus \itemmargin
2020 % Note @table, @vtable, and @vtable define @item, @itemx, etc., with
2022 % They also define \itemindex
2023 % to index the item name in whatever manner is desired (perhaps none).
2025 \newif\ifitemxneedsnegativevskip
2027 \def\itemxpar{\par\ifitemxneedsnegativevskip\nobreak\vskip-\parskip\nobreak\fi}
2029 \def\internalBitem{\smallbreak \parsearg\itemzzz}
2030 \def\internalBitemx{\itemxpar \parsearg\itemzzz}
2032 \def\internalBxitem "#1"{\def\xitemsubtopix{#1} \smallbreak \parsearg\xitemzzz}
2033 \def\internalBxitemx "#1"{\def\xitemsubtopix{#1} \itemxpar \parsearg\xitemzzz}
2035 \def\internalBkitem{\smallbreak \parsearg\kitemzzz}
2036 \def\internalBkitemx{\itemxpar \parsearg\kitemzzz}
2038 \def\kitemzzz #1{\dosubind {kw}{\code{#1}}{for {\bf \lastfunction}}%
2041 \def\xitemzzz #1{\dosubind {kw}{\code{#1}}{for {\bf \xitemsubtopic}}%
2044 \def\itemzzz #1{\begingroup %
2045 \advance\hsize by -\rightskip
2046 \advance\hsize by -\tableindent
2047 \setbox0=\hbox{\itemfont{#1}}%
2049 \nobreak % This prevents a break before @itemx.
2051 % If the item text does not fit in the space we have, put it on a line
2052 % by itself, and do not allow a page break either before or after that
2053 % line. We do not start a paragraph here because then if the next
2054 % command is, e.g., @kindex, the whatsit would get put into the
2055 % horizontal list on a line by itself, resulting in extra blank space.
2056 \ifdim \wd0>\itemmax
2058 % Make this a paragraph so we get the \parskip glue and wrapping,
2059 % but leave it ragged-right.
2061 \advance\leftskip by-\tableindent
2062 \advance\hsize by\tableindent
2063 \advance\rightskip by0pt plus1fil
2064 \leavevmode\unhbox0\par
2067 % We're going to be starting a paragraph, but we don't want the
2068 % \parskip glue -- logically it's part of the @item we just started.
2069 \nobreak \vskip-\parskip
2071 % Stop a page break at the \parskip glue coming up. (Unfortunately
2072 % we can't prevent a possible page break at the following
2073 % \baselineskip glue.) However, if what follows is an environment
2074 % such as @example, there will be no \parskip glue; then
2075 % the negative vskip we just would cause the example and the item to
2076 % crash together. So we use this bizarre value of 10001 as a signal
2077 % to \aboveenvbreak to insert \parskip glue after all.
2078 % (Possibly there are other commands that could be followed by
2079 % @example which need the same treatment, but not section titles; or
2080 % maybe section titles are the only special case and they should be
2084 \itemxneedsnegativevskipfalse
2086 % The item text fits into the space. Start a paragraph, so that the
2087 % following text (if any) will end up on the same line.
2089 % Do this with kerns and \unhbox so that if there is a footnote in
2090 % the item text, it can migrate to the main vertical list and
2091 % eventually be printed.
2092 \nobreak\kern-\tableindent
2093 \dimen0 = \itemmax \advance\dimen0 by \itemmargin \advance\dimen0 by -\wd0
2095 \nobreak\kern\dimen0
2097 \itemxneedsnegativevskiptrue
2101 \def\item{\errmessage{@item while not in a table}}
2102 \def\itemx{\errmessage{@itemx while not in a table}}
2103 \def\kitem{\errmessage{@kitem while not in a table}}
2104 \def\kitemx{\errmessage{@kitemx while not in a table}}
2105 \def\xitem{\errmessage{@xitem while not in a table}}
2106 \def\xitemx{\errmessage{@xitemx while not in a table}}
2108 % Contains a kludge to get @end[description] to work.
2109 \def\description{\tablez{\dontindex}{1}{}{}{}{}}
2111 % @table, @ftable, @vtable.
2112 \def\table{\begingroup\inENV\obeylines\obeyspaces\tablex}
2113 {\obeylines\obeyspaces%
2114 \gdef\tablex #1^^M{%
2115 \tabley\dontindex#1 \endtabley}}
2117 \def\ftable{\begingroup\inENV\obeylines\obeyspaces\ftablex}
2118 {\obeylines\obeyspaces%
2119 \gdef\ftablex #1^^M{%
2120 \tabley\fnitemindex#1 \endtabley
2121 \def\Eftable{\endgraf\afterenvbreak\endgroup}%
2122 \let\Etable=\relax}}
2124 \def\vtable{\begingroup\inENV\obeylines\obeyspaces\vtablex}
2125 {\obeylines\obeyspaces%
2126 \gdef\vtablex #1^^M{%
2127 \tabley\vritemindex#1 \endtabley
2128 \def\Evtable{\endgraf\afterenvbreak\endgroup}%
2129 \let\Etable=\relax}}
2132 \def\fnitemindex #1{\doind {fn}{\code{#1}}}%
2133 \def\vritemindex #1{\doind {vr}{\code{#1}}}%
2136 \gdef\tabley#1#2 #3 #4 #5 #6 #7\endtabley{\endgroup%
2137 \tablez{#1}{#2}{#3}{#4}{#5}{#6}}%
2140 \def\tablez #1#2#3#4#5#6{%
2143 \def\Edescription{\Etable}% Necessary kludge.
2145 \ifnum 0#3>0 \advance \leftskip by #3\mil \fi %
2146 \ifnum 0#4>0 \tableindent=#4\mil \fi %
2147 \ifnum 0#5>0 \advance \rightskip by #5\mil \fi %
2149 \itemmax=\tableindent %
2150 \advance \itemmax by -\itemmargin %
2151 \advance \leftskip by \tableindent %
2152 \exdentamount=\tableindent
2154 \parskip = \smallskipamount
2155 \ifdim \parskip=0pt \parskip=2pt \fi%
2156 \def\Etable{\endgraf\afterenvbreak\endgroup}%
2157 \let\item = \internalBitem %
2158 \let\itemx = \internalBitemx %
2159 \let\kitem = \internalBkitem %
2160 \let\kitemx = \internalBkitemx %
2161 \let\xitem = \internalBxitem %
2162 \let\xitemx = \internalBxitemx %
2165 % This is the counter used by @enumerate, which is really @itemize
2169 \def\itemize{\parsearg\itemizezzz}
2171 \def\itemizezzz #1{%
2172 \begingroup % ended by the @end itemize
2173 \itemizey {#1}{\Eitemize}
2178 \itemmax=\itemindent
2179 \advance\itemmax by -\itemmargin
2180 \advance\leftskip by \itemindent
2181 \exdentamount=\itemindent
2183 \parskip=\smallskipamount
2184 \ifdim\parskip=0pt \parskip=2pt \fi
2185 \def#2{\endgraf\afterenvbreak\endgroup}%
2186 \def\itemcontents{#1}%
2187 % @itemize with no arg is equivalent to @itemize @bullet.
2188 \ifx\itemcontents\empty\def\itemcontents{\bullet}\fi
2189 \let\item=\itemizeitem
2192 % \splitoff TOKENS\endmark defines \first to be the first token in
2193 % TOKENS, and \rest to be the remainder.
2195 \def\splitoff#1#2\endmark{\def\first{#1}\def\rest{#2}}%
2197 % Allow an optional argument of an uppercase letter, lowercase letter,
2198 % or number, to specify the first label in the enumerated list. No
2199 % argument is the same as `1'.
2201 \def\enumerate{\parsearg\enumeratezzz}
2202 \def\enumeratezzz #1{\enumeratey #1 \endenumeratey}
2203 \def\enumeratey #1 #2\endenumeratey{%
2204 \begingroup % ended by the @end enumerate
2206 % If we were given no argument, pretend we were given `1'.
2208 \ifx\thearg\empty \def\thearg{1}\fi
2210 % Detect if the argument is a single token. If so, it might be a
2211 % letter. Otherwise, the only valid thing it can be is a number.
2212 % (We will always have one token, because of the test we just made.
2213 % This is a good thing, since \splitoff doesn't work given nothing at
2214 % all -- the first parameter is undelimited.)
2215 \expandafter\splitoff\thearg\endmark
2217 % Only one token in the argument. It could still be anything.
2218 % A ``lowercase letter'' is one whose \lccode is nonzero.
2219 % An ``uppercase letter'' is one whose \lccode is both nonzero, and
2220 % not equal to itself.
2221 % Otherwise, we assume it's a number.
2223 % We need the \relax at the end of the \ifnum lines to stop TeX from
2224 % continuing to look for a <number>.
2226 \ifnum\lccode\expandafter`\thearg=0\relax
2227 \numericenumerate % a number (we hope)
2230 \ifnum\lccode\expandafter`\thearg=\expandafter`\thearg\relax
2231 \lowercaseenumerate % lowercase letter
2233 \uppercaseenumerate % uppercase letter
2237 % Multiple tokens in the argument. We hope it's a number.
2242 % An @enumerate whose labels are integers. The starting integer is
2245 \def\numericenumerate{%
2247 \startenumeration{\the\itemno}%
2250 % The starting (lowercase) letter is in \thearg.
2251 \def\lowercaseenumerate{%
2252 \itemno = \expandafter`\thearg
2254 % Be sure we're not beyond the end of the alphabet.
2256 \errmessage{No more lowercase letters in @enumerate; get a bigger
2263 % The starting (uppercase) letter is in \thearg.
2264 \def\uppercaseenumerate{%
2265 \itemno = \expandafter`\thearg
2267 % Be sure we're not beyond the end of the alphabet.
2269 \errmessage{No more uppercase letters in @enumerate; get a bigger
2276 % Call itemizey, adding a period to the first argument and supplying the
2277 % common last two arguments. Also subtract one from the initial value in
2278 % \itemno, since @item increments \itemno.
2280 \def\startenumeration#1{%
2281 \advance\itemno by -1
2282 \itemizey{#1.}\Eenumerate\flushcr
2285 % @alphaenumerate and @capsenumerate are abbreviations for giving an arg
2288 \def\alphaenumerate{\enumerate{a}}
2289 \def\capsenumerate{\enumerate{A}}
2290 \def\Ealphaenumerate{\Eenumerate}
2291 \def\Ecapsenumerate{\Eenumerate}
2293 % Definition of @item while inside @itemize.
2296 \advance\itemno by 1
2297 {\let\par=\endgraf \smallbreak}%
2298 \ifhmode \errmessage{In hmode at itemizeitem}\fi
2299 {\parskip=0in \hskip 0pt
2300 \hbox to 0pt{\hss \itemcontents\hskip \itemmargin}%
2301 \vadjust{\penalty 1200}}%
2304 % @multitable macros
2305 % Amy Hendrickson, 8/18/94, 3/6/96
2307 % @multitable ... @end multitable will make as many columns as desired.
2308 % Contents of each column will wrap at width given in preamble. Width
2309 % can be specified either with sample text given in a template line,
2310 % or in percent of \hsize, the current width of text on page.
2312 % Table can continue over pages but will only break between lines.
2316 % Either define widths of columns in terms of percent of \hsize:
2317 % @multitable @columnfractions .25 .3 .45
2320 % Numbers following @columnfractions are the percent of the total
2321 % current hsize to be used for each column. You may use as many
2322 % columns as desired.
2325 % Or use a template:
2326 % @multitable {Column 1 template} {Column 2 template} {Column 3 template}
2328 % using the widest term desired in each column.
2330 % For those who want to use more than one line's worth of words in
2331 % the preamble, break the line within one argument and it
2332 % will parse correctly, i.e.,
2334 % @multitable {Column 1 template} {Column 2 template} {Column 3
2337 % @multitable {Column 1 template} {Column 2 template}
2338 % {Column 3 template}
2340 % Each new table line starts with @item, each subsequent new column
2341 % starts with @tab. Empty columns may be produced by supplying @tab's
2342 % with nothing between them for as many times as empty columns are needed,
2343 % ie, @tab@tab@tab will produce two empty columns.
2345 % @item, @tab, @multitable or @end multitable do not need to be on their
2346 % own lines, but it will not hurt if they are.
2348 % Sample multitable:
2350 % @multitable {Column 1 template} {Column 2 template} {Column 3 template}
2351 % @item first col stuff @tab second col stuff @tab third col
2358 % @item first col stuff @tab second col stuff
2359 % @tab Many paragraphs of text may be used in any column.
2361 % They will wrap at the width determined by the template.
2362 % @item@tab@tab This will be in third column.
2365 % Default dimensions may be reset by user.
2366 % @multitableparskip is vertical space between paragraphs in table.
2367 % @multitableparindent is paragraph indent in table.
2368 % @multitablecolmargin is horizontal space to be left between columns.
2369 % @multitablelinespace is space to leave between table items, baseline
2371 % 0pt means it depends on current normal line spacing.
2373 \newskip\multitableparskip
2374 \newskip\multitableparindent
2375 \newdimen\multitablecolspace
2376 \newskip\multitablelinespace
2377 \multitableparskip=0pt
2378 \multitableparindent=6pt
2379 \multitablecolspace=12pt
2380 \multitablelinespace=0pt
2382 % Macros used to set up halign preamble:
2384 \let\endsetuptable\relax
2385 \def\xendsetuptable{\endsetuptable}
2386 \let\columnfractions\relax
2387 \def\xcolumnfractions{\columnfractions}
2390 % #1 is the part of the @columnfraction before the decimal point, which
2391 % is presumably either 0 or the empty string (but we don't check, we
2392 % just throw it away). #2 is the decimal part, which we use as the
2393 % percent of \hsize for this column.
2394 \def\pickupwholefraction#1.#2 {%
2395 \global\advance\colcount by 1
2396 \expandafter\xdef\csname col\the\colcount\endcsname{.#2\hsize}%
2403 \ifx\firstarg\xendsetuptable
2406 \ifx\firstarg\xcolumnfractions
2407 \global\setpercenttrue
2410 \let\go\pickupwholefraction
2412 \global\advance\colcount by 1
2413 \setbox0=\hbox{#1\unskip\space}% Add a normal word space as a
2414 % separator; typically that is always in the input, anyway.
2415 \expandafter\xdef\csname col\the\colcount\endcsname{\the\wd0}%
2418 \ifx\go\pickupwholefraction
2419 % Put the argument back for the \pickupwholefraction call, so
2420 % we'll always have a period there to be parsed.
2421 \def\go{\pickupwholefraction#1}%
2423 \let\go = \setuptable
2429 \def\headitem{\errmessage{@headitem outside of @multitable}}
2431 % @multitable ... @end multitable definitions:
2433 \def\multitable{\parsearg\dotable}
2434 \def\dotable#1{\bgroup
2436 \let\item=\crcrwithfootnotes
2437 % FIXXME, @headitem should change the font for its row to bold.
2438 \let\headitem=\crcrwithfootnotes
2439 % A \tab used to include \hskip1sp. But then the space in a template
2440 % line is not enough. That is bad. So let's go back to just & until
2441 % we encounter the problem it was intended to solve again. --karl,
2442 % nathan@acm.org, 20apr99.
2444 \let\startfootins=\startsavedfootnote
2447 \setmultitablespacing
2448 \parskip=\multitableparskip
2449 \parindent=\multitableparindent
2453 \global\setpercentfalse
2454 \crcrwithfootnotes\crcr
2458 % To parse everything between @multitable and @item:
2459 \setuptable#1 \endsetuptable
2461 % \everycr will reset column counter, \colcount, at the end of
2462 % each line. Every column entry will cause \colcount to advance by one.
2463 % The table preamble
2464 % looks at the current \colcount to find the correct column width.
2467 % \filbreak%% keeps underfull box messages off when table breaks over pages.
2468 % Maybe so, but it also creates really weird page breaks when the table
2469 % breaks over pages. Wouldn't \vfil be better? Wait until the problem
2470 % manifests itself, so it can be fixed for real --karl.
2471 \global\colcount=0\relax}}%
2473 % This preamble sets up a generic column definition, which will
2474 % be used as many times as user calls for columns.
2475 % \vtop will set a single line and will also let text wrap and
2476 % continue for many paragraphs if desired.
2477 \halign\bgroup&\global\advance\colcount by 1\relax
2478 \multistrut\vtop{\hsize=\expandafter\csname col\the\colcount\endcsname
2480 % In order to keep entries from bumping into each other
2481 % we will add a \leftskip of \multitablecolspace to all columns after
2484 % If a template has been used, we will add \multitablecolspace
2485 % to the width of each template entry.
2487 % If the user has set preamble in terms of percent of \hsize we will
2488 % use that dimension as the width of the column, and the \leftskip
2489 % will keep entries from bumping into each other. Table will start at
2490 % left margin and final column will justify at right margin.
2492 % Make sure we don't inherit \rightskip from the outer environment.
2495 % The first column will be indented with the surrounding text.
2496 \advance\hsize by\leftskip
2499 % If user has not set preamble in terms of percent of \hsize
2500 % we will advance \hsize by \multitablecolspace.
2501 \advance\hsize by \multitablecolspace
2503 % In either case we will make \leftskip=\multitablecolspace:
2504 \leftskip=\multitablecolspace
2506 % Ignoring space at the beginning and end avoids an occasional spurious
2507 % blank line, when TeX decides to break the line at the space before the
2508 % box from the multistrut, so the strut ends up on a line by itself.
2510 % @multitable @columnfractions .11 .89
2512 % @tab Legal holiday which is valid in major parts of the whole country.
2513 % Is automatically provided with highlighting sequences respectively marking
2515 \noindent\ignorespaces##\unskip\multistrut}\cr
2518 \def\setmultitablespacing{% test to see if user has set \multitablelinespace.
2519 % If so, do nothing. If not, give it an appropriate dimension based on
2520 % current baselineskip.
2521 \ifdim\multitablelinespace=0pt
2522 \setbox0=\vbox{X}\global\multitablelinespace=\the\baselineskip
2523 \global\advance\multitablelinespace by-\ht0
2524 %% strut to put in table in case some entry doesn't have descenders,
2525 %% to keep lines equally spaced
2526 \let\multistrut = \strut
2528 %% FIXME: what is \box0 supposed to be?
2529 \gdef\multistrut{\vrule height\multitablelinespace depth\dp0
2531 %% Test to see if parskip is larger than space between lines of
2532 %% table. If not, do nothing.
2533 %% If so, set to same dimension as multitablelinespace.
2534 \ifdim\multitableparskip>\multitablelinespace
2535 \global\multitableparskip=\multitablelinespace
2536 \global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
2537 %% than skip between lines in the table.
2539 \ifdim\multitableparskip=0pt
2540 \global\multitableparskip=\multitablelinespace
2541 \global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
2542 %% than skip between lines in the table.
2545 % In case a @footnote appears inside an alignment, save the footnote
2546 % text to a box and make the \insert when a row of the table is
2547 % finished. Otherwise, the insertion is lost, it never migrates to the
2548 % main vertical list. --kasal, 22jan03.
2550 \newbox\savedfootnotes
2552 % \dotable \let's \startfootins to this, so that \dofootnote will call
2553 % it instead of starting the insertion right away.
2554 \def\startsavedfootnote{%
2555 \global\setbox\savedfootnotes = \vbox\bgroup
2556 \unvbox\savedfootnotes
2558 \def\crcrwithfootnotes{%
2560 \ifvoid\savedfootnotes \else
2561 \noalign{\insert\footins{\box\savedfootnotes}}%
2565 \message{conditionals,}
2566 % Prevent errors for section commands.
2567 % Used in @ignore and in failing conditionals.
2568 \def\ignoresections{%
2569 \let\appendix=\relax
2570 \let\appendixsec=\relax
2571 \let\appendixsection=\relax
2572 \let\appendixsubsec=\relax
2573 \let\appendixsubsection=\relax
2574 \let\appendixsubsubsec=\relax
2575 \let\appendixsubsubsection=\relax
2578 \let\centerchap=\relax
2580 \let\contents=\relax
2582 \let\smallbook=\relax
2584 \let\subsection=\relax
2585 \let\subsubsec=\relax
2586 \let\subsubsection=\relax
2587 \let\titlepage=\relax
2589 \let\unnumbered=\relax
2590 \let\unnumberedsec=\relax
2591 \let\unnumberedsection=\relax
2592 \let\unnumberedsubsec=\relax
2593 \let\unnumberedsubsection=\relax
2594 \let\unnumberedsubsubsec=\relax
2595 \let\unnumberedsubsubsection=\relax
2598 % Ignore @ignore, @ifhtml, @ifinfo, and the like.
2600 \def\direntry{\doignore{direntry}}
2601 \def\documentdescriptionword{documentdescription}
2602 \def\documentdescription{\doignore{documentdescription}}
2603 \def\docbook{\doignore{docbook}}
2604 \def\html{\doignore{html}}
2605 \def\ifdocbook{\doignore{ifdocbook}}
2606 \def\ifhtml{\doignore{ifhtml}}
2607 \def\ifinfo{\doignore{ifinfo}}
2608 \def\ifnottex{\doignore{ifnottex}}
2609 \def\ifplaintext{\doignore{ifplaintext}}
2610 \def\ifxml{\doignore{ifxml}}
2611 \def\ignore{\doignore{ignore}}
2612 \def\menu{\doignore{menu}}
2613 \def\xml{\doignore{xml}}
2615 % @dircategory CATEGORY -- specify a category of the dir file
2616 % which this file should belong to. Ignore this in TeX.
2617 \let\dircategory = \comment
2619 % Ignore text until a line `@end #1', keeping track of nested conditionals.
2621 % A count to remember the depth of nesting.
2622 \newcount\doignorecount
2624 \def\doignore#1{\begingroup
2625 % Don't complain about control sequences we have declared \outer.
2628 % Make sure that spaces turn into tokens that match what \doignoretext wants.
2629 \catcode\spaceChar = 10
2631 % Ignore braces, so mismatched braces don't cause trouble.
2635 % Count number of #1's that we've seen.
2638 % Swallow text until we reach the matching `@end #1'.
2639 \expandafter \dodoignore \csname#1\endcsname {#1}%
2642 { \catcode`@=11 % We want to use \ST@P which cannot appear in texinfo source.
2645 \gdef\dodoignore#1#2{%
2646 % #1 contains, e.g., \ifinfo, a.k.a. @ifinfo.
2647 % #2 contains the string `ifinfo'.
2649 % Define a command to find the next `@end #2', which must be on a line
2651 \long\def\doignoretext##1^^M\end #2{\doignoretextyyy##1^^M#1\ST@P}%
2652 % And this command to find another #1 command, at the beginning of a
2653 % line. (Otherwise, we would consider a line `@c @ifset', for
2654 % example, to count as an @ifset for nesting.)
2655 \long\def\doignoretextyyy##1^^M#1##2\ST@P{\doignoreyyy{##2}\ST@P}%
2657 % And now expand that command.
2663 \def\doignoreyyy#1{%
2665 \ifx\temp\empty % Nothing found.
2666 \let\next\doignoretextzzz
2667 \else % Found a nested condition, ...
2668 \advance\doignorecount by 1
2669 \let\next\doignoretextyyy % ..., look for another.
2670 % If we're here, #1 ends with ^^M\ifinfo (for example).
2672 \next #1% the token \ST@P is present just after this macro.
2675 % We have to swallow the remaining "\ST@P".
2677 \def\doignoretextzzz#1{%
2678 \ifnum\doignorecount = 0 % We have just found the outermost @end.
2679 \let\next\enddoignore
2680 \else % Still inside a nested condition.
2681 \advance\doignorecount by -1
2682 \let\next\doignoretext % Look for the next @end.
2687 % Finish off ignored text.
2688 \def\enddoignore{\endgroup\ignorespaces}
2691 % @set VAR sets the variable VAR to an empty value.
2692 % @set VAR REST-OF-LINE sets VAR to the value REST-OF-LINE.
2694 % Since we want to separate VAR from REST-OF-LINE (which might be
2695 % empty), we can't just use \parsearg; we have to insert a space of our
2696 % own to delimit the rest of the line, and then take it out again if we
2697 % didn't need it. Make sure the catcode of space is correct to avoid
2698 % losing inside @example, for instance.
2700 \def\set{\begingroup\catcode` =10
2701 \catcode`\-=12 \catcode`\_=12 % Allow - and _ in VAR.
2703 \def\setxxx#1{\setyyy#1 \endsetyyy}
2704 \def\setyyy#1 #2\endsetyyy{%
2706 \ifx\temp\empty \global\expandafter\let\csname SET#1\endcsname = \empty
2707 \else \setzzz{#1}#2\endsetzzz % Remove the trailing space \setxxx inserted.
2711 % Can't use \xdef to pre-expand #2 and save some time, since \temp or
2712 % \next or other control sequences that we've defined might get us into
2713 % an infinite loop. Consider `@set foo @cite{bar}'.
2714 \def\setzzz#1#2 \endsetzzz{\expandafter\gdef\csname SET#1\endcsname{#2}}
2716 % @clear VAR clears (i.e., unsets) the variable VAR.
2718 \def\clear{\parsearg\clearxxx}
2719 \def\clearxxx#1{\global\expandafter\let\csname SET#1\endcsname=\relax}
2721 % @value{foo} gets the text saved in variable foo.
2723 \catcode`\_ = \active
2725 % We might end up with active _ or - characters in the argument if
2726 % we're called from @code, as @code{@value{foo-bar_}}. So \let any
2727 % such active characters to their normal equivalents.
2728 \gdef\value{\begingroup
2729 \catcode`\-=\other \catcode`\_=\other
2730 \indexbreaks \let_\normalunderscore
2733 \def\valuexxx#1{\expandablevalue{#1}\endgroup}
2735 % We have this subroutine so that we can handle at least some @value's
2736 % properly in indexes (we \let\value to this in \indexdummies). Ones
2737 % whose names contain - or _ still won't work, but we can't do anything
2738 % about that. The command has to be fully expandable (if the variable
2739 % is set), since the result winds up in the index file. This means that
2740 % if the variable's value contains other Texinfo commands, it's almost
2741 % certain it will fail (although perhaps we could fix that with
2742 % sufficient work to do a one-level expansion on the result, instead of
2745 \def\expandablevalue#1{%
2746 \expandafter\ifx\csname SET#1\endcsname\relax
2747 {[No value for ``#1'']}%
2748 \message{Variable `#1', used in @value, is not set.}%
2750 \csname SET#1\endcsname
2754 % @ifset VAR ... @end ifset reads the `...' iff VAR has been defined
2757 \def\ifset{\parsearg\doifset}
2759 \expandafter\ifx\csname SET#1\endcsname\relax
2760 \let\next=\ifsetfail
2762 \let\next=\ifsetsucceed
2766 \def\ifsetsucceed{\conditionalsucceed{ifset}}
2767 \def\ifsetfail{\doignore{ifset}}
2768 \defineunmatchedend{ifset}
2770 % @ifclear VAR ... @end ifclear reads the `...' iff VAR has never been
2771 % defined with @set, or has been undefined with @clear.
2773 \def\ifclear{\parsearg\doifclear}
2775 \expandafter\ifx\csname SET#1\endcsname\relax
2776 \let\next=\ifclearsucceed
2778 \let\next=\ifclearfail
2782 \def\ifclearsucceed{\conditionalsucceed{ifclear}}
2783 \def\ifclearfail{\doignore{ifclear}}
2784 \defineunmatchedend{ifclear}
2786 % @iftex, @ifnothtml, @ifnotinfo, @ifnotplaintext always succeed; we
2787 % read the text following, through the first @end iftex (etc.). Make
2788 % `@end iftex' (etc.) valid only after an @iftex.
2790 \def\iftex{\conditionalsucceed{iftex}}
2791 \def\ifnothtml{\conditionalsucceed{ifnothtml}}
2792 \def\ifnotinfo{\conditionalsucceed{ifnotinfo}}
2793 \def\ifnotplaintext{\conditionalsucceed{ifnotplaintext}}
2794 \defineunmatchedend{iftex}
2795 \defineunmatchedend{ifnothtml}
2796 \defineunmatchedend{ifnotinfo}
2797 \defineunmatchedend{ifnotplaintext}
2799 % True conditional. Since \set globally defines its variables, we can
2800 % just start and end a group (to keep the @end definition undefined at
2803 \def\conditionalsucceed#1{\begingroup
2804 \expandafter\def\csname E#1\endcsname{\endgroup}%
2807 % @defininfoenclose.
2808 \let\definfoenclose=\comment
2812 % Index generation facilities
2814 % Define \newwrite to be identical to plain tex's \newwrite
2815 % except not \outer, so it can be used within \newindex.
2817 \gdef\newwrite{\alloc@7\write\chardef\sixt@@n}}
2819 % \newindex {foo} defines an index named foo.
2820 % It automatically defines \fooindex such that
2821 % \fooindex ...rest of line... puts an entry in the index foo.
2822 % It also defines \fooindfile to be the number of the output channel for
2823 % the file that accumulates this index. The file's extension is foo.
2824 % The name of an index should be no more than 2 characters long
2825 % for the sake of vms.
2829 \expandafter\newwrite \csname#1indfile\endcsname
2830 \openout \csname#1indfile\endcsname \jobname.#1 % Open the file
2832 \expandafter\xdef\csname#1index\endcsname{% % Define @#1index
2833 \noexpand\doindex{#1}}
2836 % @defindex foo == \newindex{foo}
2838 \def\defindex{\parsearg\newindex}
2840 % Define @defcodeindex, like @defindex except put all entries in @code.
2842 \def\defcodeindex{\parsearg\newcodeindex}
2844 \def\newcodeindex#1{%
2846 \expandafter\newwrite \csname#1indfile\endcsname
2847 \openout \csname#1indfile\endcsname \jobname.#1
2849 \expandafter\xdef\csname#1index\endcsname{%
2850 \noexpand\docodeindex{#1}}%
2854 % @synindex foo bar makes index foo feed into index bar.
2855 % Do this instead of @defindex foo if you don't want it as a separate index.
2857 % @syncodeindex foo bar similar, but put all entries made for index foo
2860 \def\synindex#1 #2 {\dosynindex\doindex{#1}{#2}}
2861 \def\syncodeindex#1 #2 {\dosynindex\docodeindex{#1}{#2}}
2863 % #1 is \doindex or \docodeindex, #2 the index getting redefined (foo),
2864 % #3 the target index (bar).
2865 \def\dosynindex#1#2#3{%
2866 % Only do \closeout if we haven't already done it, else we'll end up
2867 % closing the target index.
2868 \expandafter \ifx\csname donesynindex#2\endcsname \undefined
2869 % The \closeout helps reduce unnecessary open files; the limit on the
2870 % Acorn RISC OS is a mere 16 files.
2871 \expandafter\closeout\csname#2indfile\endcsname
2872 \expandafter\let\csname\donesynindex#2\endcsname = 1
2874 % redefine \fooindfile:
2875 \expandafter\let\expandafter\temp\expandafter=\csname#3indfile\endcsname
2876 \expandafter\let\csname#2indfile\endcsname=\temp
2877 % redefine \fooindex:
2878 \expandafter\xdef\csname#2index\endcsname{\noexpand#1{#3}}%
2881 % Define \doindex, the driver for all \fooindex macros.
2882 % Argument #1 is generated by the calling \fooindex macro,
2883 % and it is "foo", the name of the index.
2885 % \doindex just uses \parsearg; it calls \doind for the actual work.
2886 % This is because \doind is more useful to call from other macros.
2888 % There is also \dosubind {index}{topic}{subtopic}
2889 % which makes an entry in a two-level index such as the operation index.
2891 \def\doindex#1{\edef\indexname{#1}\parsearg\singleindexer}
2892 \def\singleindexer #1{\doind{\indexname}{#1}}
2894 % like the previous two, but they put @code around the argument.
2895 \def\docodeindex#1{\edef\indexname{#1}\parsearg\singlecodeindexer}
2896 \def\singlecodeindexer #1{\doind{\indexname}{\code{#1}}}
2898 % Take care of Texinfo commands that can appear in an index entry.
2899 % Since there are some commands we want to expand, and others we don't,
2900 % we have to laboriously prevent expansion for those that we don't.
2903 \def\@{@}% change to @@ when we switch to @ as escape char in index files.
2904 \def\ {\realbackslash\space }%
2905 % Need these in case \tex is in effect and \{ is a \delimiter again.
2906 % But can't use \lbracecmd and \rbracecmd because texindex assumes
2907 % braces and backslashes are used only as delimiters.
2911 % \definedummyword defines \#1 as \realbackslash #1\space, thus
2912 % effectively preventing its expansion. This is used only for control
2913 % words, not control letters, because the \space would be incorrect
2914 % for control characters, but is needed to separate the control word
2915 % from whatever follows.
2917 % For control letters, we have \definedummyletter, which omits the
2920 % These can be used both for control words that take an argument and
2921 % those that do not. If it is followed by {arg} in the input, then
2922 % that will dutifully get written to the index (or wherever).
2924 \def\definedummyword##1{%
2925 \expandafter\def\csname ##1\endcsname{\realbackslash ##1\space}%
2927 \def\definedummyletter##1{%
2928 \expandafter\def\csname ##1\endcsname{\realbackslash ##1}%
2931 % Do the redefinitions.
2935 % For the aux file, @ is the escape character. So we want to redefine
2936 % everything using @ instead of \realbackslash. When everything uses
2937 % @, this will be simpler.
2942 \let\{ = \lbraceatcmd
2943 \let\} = \rbraceatcmd
2945 % (See comments in \indexdummies.)
2946 \def\definedummyword##1{%
2947 \expandafter\def\csname ##1\endcsname{@##1\space}%
2949 \def\definedummyletter##1{%
2950 \expandafter\def\csname ##1\endcsname{@##1}%
2953 % Do the redefinitions.
2957 % Called from \indexdummies and \atdummies. \definedummyword and
2958 % \definedummyletter must be defined first.
2960 \def\commondummies{%
2962 \normalturnoffactive
2964 % Control letters and accents.
2965 \definedummyletter{_}%
2966 \definedummyletter{,}%
2967 \definedummyletter{"}%
2968 \definedummyletter{`}%
2969 \definedummyletter{'}%
2970 \definedummyletter{^}%
2971 \definedummyletter{~}%
2972 \definedummyletter{=}%
2973 \definedummyword{u}%
2974 \definedummyword{v}%
2975 \definedummyword{H}%
2976 \definedummyword{dotaccent}%
2977 \definedummyword{ringaccent}%
2978 \definedummyword{tieaccent}%
2979 \definedummyword{ubaraccent}%
2980 \definedummyword{udotaccent}%
2981 \definedummyword{dotless}%
2983 % Other non-English letters.
2984 \definedummyword{AA}%
2985 \definedummyword{AE}%
2986 \definedummyword{L}%
2987 \definedummyword{OE}%
2988 \definedummyword{O}%
2989 \definedummyword{aa}%
2990 \definedummyword{ae}%
2991 \definedummyword{l}%
2992 \definedummyword{oe}%
2993 \definedummyword{o}%
2994 \definedummyword{ss}%
2996 % Although these internal commands shouldn't show up, sometimes they do.
2997 \definedummyword{bf}%
2998 \definedummyword{gtr}%
2999 \definedummyword{hat}%
3000 \definedummyword{less}%
3001 \definedummyword{sf}%
3002 \definedummyword{sl}%
3003 \definedummyword{tclose}%
3004 \definedummyword{tt}%
3006 % Texinfo font commands.
3007 \definedummyword{b}%
3008 \definedummyword{i}%
3009 \definedummyword{r}%
3010 \definedummyword{sc}%
3011 \definedummyword{t}%
3013 \definedummyword{TeX}%
3014 \definedummyword{acronym}%
3015 \definedummyword{cite}%
3016 \definedummyword{code}%
3017 \definedummyword{command}%
3018 \definedummyword{dfn}%
3019 \definedummyword{dots}%
3020 \definedummyword{emph}%
3021 \definedummyword{env}%
3022 \definedummyword{file}%
3023 \definedummyword{kbd}%
3024 \definedummyword{key}%
3025 \definedummyword{math}%
3026 \definedummyword{option}%
3027 \definedummyword{samp}%
3028 \definedummyword{strong}%
3029 \definedummyword{uref}%
3030 \definedummyword{url}%
3031 \definedummyword{var}%
3032 \definedummyword{verb}%
3033 \definedummyword{w}%
3035 % Assorted special characters.
3036 \definedummyword{bullet}%
3037 \definedummyword{copyright}%
3038 \definedummyword{registeredsymbol}%
3039 \definedummyword{dots}%
3040 \definedummyword{enddots}%
3041 \definedummyword{equiv}%
3042 \definedummyword{error}%
3043 \definedummyword{expansion}%
3044 \definedummyword{minus}%
3045 \definedummyword{pounds}%
3046 \definedummyword{point}%
3047 \definedummyword{print}%
3048 \definedummyword{result}%
3050 % Handle some cases of @value -- where the variable name does not
3051 % contain - or _, and the value does not contain any
3052 % (non-fully-expandable) commands.
3053 \let\value = \expandablevalue
3055 % Normal spaces, not active ones.
3058 % No macro expansion.
3063 % \indexnofonts is used when outputting the strings to sort the index
3064 % by, and when constructing control sequence names. It eliminates all
3065 % control sequences and just writes whatever the best ASCII sort string
3066 % would be for a given command (usually its argument).
3068 \def\indexdummytex{TeX}
3069 \def\indexdummydots{...}
3074 % how to handle braces?
3075 \def\_{\normalunderscore}%
3087 \let\dotaccent=\asis
3088 \let\ringaccent=\asis
3089 \let\tieaccent=\asis
3090 \let\ubaraccent=\asis
3091 \let\udotaccent=\asis
3094 % Other non-English letters.
3107 \def\questiondown{?}%
3109 % Don't no-op \tt, since it isn't a user-level command
3110 % and is used in the definitions of the active chars like <, >, |, etc.
3111 % Likewise with the other plain tex font commands.
3114 % Texinfo font commands.
3121 \let\TeX=\indexdummytex
3127 \let\dots=\indexdummydots
3144 \let\indexbackslash=0 %overridden during \printindex.
3145 \let\SETmarginindex=\relax % put index entries in margin (undocumented)?
3147 % Most index entries go through here, but \dosubind is the general case.
3148 % #1 is the index name, #2 is the entry text.
3149 \def\doind#1#2{\dosubind{#1}{#2}{}}
3151 % Workhorse for all \fooindexes.
3152 % #1 is name of index, #2 is stuff to put there, #3 is subentry --
3153 % \empty if called from \doind, as we usually are. The main exception
3154 % is with some defuns, which call us directly.
3156 \def\dosubind#1#2#3{%
3159 % Store the main index entry text (including the third arg).
3161 % If third arg is present, precede it with a space.
3163 \ifx\thirdarg\empty \else
3164 \toks0 = \expandafter{\the\toks0 \space #3}%
3167 \edef\writeto{\csname#1indfile\endcsname}%
3178 % Write the entry in \toks0 to the index file:
3180 \def\dosubindwrite{%
3181 % Put the index entry in the margin if desired.
3182 \ifx\SETmarginindex\relax\else
3183 \insert\margin{\hbox{\vrule height8pt depth3pt width0pt \the\toks0}}%
3186 % Remember, we are within a group.
3187 \indexdummies % Must do this here, since \bf, etc expand at this stage
3189 \def\rawbackslashxx{\indexbackslash}% \indexbackslash isn't defined now
3190 % so it will be output as is; and it will print as backslash.
3192 % Process the index entry with all font commands turned off, to
3193 % get the string to sort by.
3195 \edef\temp{\the\toks0}% need full expansion
3196 \xdef\indexsorttmp{\temp}%
3199 % Set up the complete index entry, with both the sort key and
3200 % the original text, including any font commands. We write
3201 % three arguments to \entry to the .?? file (four in the
3202 % subentry case), texindex reduces to two when writing the .??s
3206 \string\entry{\indexsorttmp}{\noexpand\folio}{\the\toks0}}%
3211 % Take care of unwanted page breaks:
3213 % If a skip is the last thing on the list now, preserve it
3214 % by backing up by \lastskip, doing the \write, then inserting
3215 % the skip again. Otherwise, the whatsit generated by the
3216 % \write will make \lastskip zero. The result is that sequences
3221 % will have extra space inserted, because the \medbreak in the
3222 % start of the @defun won't see the skip inserted by the @end of
3223 % the previous defun.
3225 % But don't do any of this if we're not in vertical mode. We
3226 % don't want to do a \vskip and prematurely end a paragraph.
3228 % Avoid page breaks due to these extra skips, too.
3230 \def\dosubindsanitize{%
3231 % \lastskip and \lastpenalty cannot both be nonzero simultaneously.
3233 \count255 = \lastpenalty
3235 % If \lastskip is nonzero, that means the last item was a
3236 % skip. And since a skip is discardable, that means this
3237 % -\skip0 glue we're inserting is preceded by a
3238 % non-discardable item, therefore it is not a potential
3239 % breakpoint, therefore no \nobreak needed.
3240 \ifdim\lastskip = 0pt \else \vskip-\skip0 \fi
3245 % if \lastskip was zero, perhaps the last item was a
3246 % penalty, and perhaps it was >=10000, e.g., a \nobreak.
3247 % In that case, we want to re-insert the penalty; since we
3248 % just inserted a non-discardable item, any following glue
3249 % (such as a \parskip) would be a breakpoint. For example:
3250 % @deffn deffn-whatever
3251 % @vindex index-whatever
3253 % would allow a break between the index-whatever whatsit
3254 % and the "Description." paragraph.
3255 \ifnum\count255>9999 \nobreak \fi
3257 % On the other hand, if we had a nonzero \lastskip,
3258 % this make-up glue would be preceded by a non-discardable item
3259 % (the whatsit from the \write), so we must insert a \nobreak.
3260 \nobreak\vskip\skip0
3264 % The index entry written in the file actually looks like
3265 % \entry {sortstring}{page}{topic}
3267 % \entry {sortstring}{page}{topic}{subtopic}
3268 % The texindex program reads in these files and writes files
3269 % containing these kinds of lines:
3271 % before the first topic whose initial is c
3272 % \entry {topic}{pagelist}
3273 % for a topic that is used without subtopics
3275 % for the beginning of a topic that is used with subtopics
3276 % \secondary {subtopic}{pagelist}
3277 % for each subtopic.
3279 % Define the user-accessible indexing commands
3280 % @findex, @vindex, @kindex, @cindex.
3282 \def\findex {\fnindex}
3283 \def\kindex {\kyindex}
3284 \def\cindex {\cpindex}
3285 \def\vindex {\vrindex}
3286 \def\tindex {\tpindex}
3287 \def\pindex {\pgindex}
3289 \def\cindexsub {\begingroup\obeylines\cindexsub}
3291 \gdef\cindexsub "#1" #2^^M{\endgroup %
3292 \dosubind{cp}{#2}{#1}}}
3294 % Define the macros used in formatting output of the sorted index material.
3296 % @printindex causes a particular index (the ??s file) to get printed.
3297 % It does not print any chapter heading (usually an @unnumbered).
3299 \def\printindex{\parsearg\doprintindex}
3300 \def\doprintindex#1{\begingroup
3301 \dobreak \chapheadingskip{10000}%
3305 \everypar = {}% don't want the \kern\-parindent from indentation suppression.
3308 % See if the index file exists and is nonempty.
3309 % Change catcode of @ here so that if the index file contains
3311 % as its first line, TeX doesn't complain about mismatched braces
3312 % (because it thinks @} is a control sequence).
3314 \openin 1 \jobname.#1s
3316 % \enddoublecolumns gets confused if there is no text in the index,
3317 % and it loses the chapter title and the aux file entries for the
3318 % index. The easiest way to prevent this problem is to make sure
3319 % there is some text.
3320 \putwordIndexNonexistent
3323 % If the index file exists but is empty, then \openin leaves \ifeof
3324 % false. We have to make TeX try to read something from the file, so
3325 % it can discover if there is anything in it.
3328 \putwordIndexIsEmpty
3330 % Index files are almost Texinfo source, but we use \ as the escape
3331 % character. It would be better to use @, but that's too big a change
3332 % to make right now.
3333 \def\indexbackslash{\rawbackslashxx}%
3344 % These macros are used by the sorted index file itself.
3345 % Change them to control the appearance of the index.
3348 % Some minor font changes for the special characters.
3349 \let\tentt=\sectt \let\tt=\sectt \let\sf=\sectt
3351 % Remove any glue we may have, we'll be inserting our own.
3354 % We like breaks before the index initials, so insert a bonus.
3357 % Typeset the initial. Making this add up to a whole number of
3358 % baselineskips increases the chance of the dots lining up from column
3359 % to column. It still won't often be perfect, because of the stretch
3360 % we need before each entry, but it's better.
3362 % No shrink because it confuses \balancecolumns.
3363 \vskip 1.67\baselineskip plus .5\baselineskip
3364 \leftline{\secbf #1}%
3365 \vskip .33\baselineskip plus .1\baselineskip
3367 % Do our best not to break after the initial.
3371 % This typesets a paragraph consisting of #1, dot leaders, and then #2
3372 % flush to the right margin. It is used for index and table of contents
3373 % entries. The paragraph is indented by \leftskip.
3375 \def\entry#1#2{\begingroup
3377 % Start a new paragraph if necessary, so our assignments below can't
3378 % affect previous text.
3381 % Do not fill out the last line with white space.
3384 % No extra space above this paragraph.
3387 % Do not prefer a separate line ending with a hyphen to fewer lines.
3388 \finalhyphendemerits = 0
3390 % \hangindent is only relevant when the entry text and page number
3391 % don't both fit on one line. In that case, bob suggests starting the
3392 % dots pretty far over on the line. Unfortunately, a large
3393 % indentation looks wrong when the entry text itself is broken across
3394 % lines. So we use a small indentation and put up with long leaders.
3396 % \hangafter is reset to 1 (which is the value we want) at the start
3397 % of each paragraph, so we need not do anything with that.
3400 % When the entry text needs to be broken, just fill out the first line
3402 \rightskip = 0pt plus1fil
3404 % A bit of stretch before each entry for the benefit of balancing columns.
3407 % Start a ``paragraph'' for the index entry so the line breaking
3408 % parameters we've set above will have an effect.
3411 % Insert the text of the index entry. TeX will do line-breaking on it.
3413 % The following is kludged to not output a line of dots in the index if
3414 % there are no page numbers. The next person who breaks this will be
3415 % cursed by a Unix daemon.
3418 \edef\tempc{\tempa}%
3419 \edef\tempd{\tempb}%
3420 \ifx\tempc\tempd\ \else%
3422 % If we must, put the page number on a line of its own, and fill out
3423 % this line with blank space. (The \hfil is overwhelmed with the
3424 % fill leaders glue in \indexdotfill if the page number does fit.)
3426 \null\nobreak\indexdotfill % Have leaders before the page number.
3428 % The `\ ' here is removed by the implicit \unskip that TeX does as
3429 % part of (the primitive) \par. Without it, a spurious underfull
3432 \pdfgettoks#2.\ \the\toksA % The page number ends the paragraph.
3434 \ #2% The page number ends the paragraph.
3440 % Like \dotfill except takes at least 1 em.
3441 \def\indexdotfill{\cleaders
3442 \hbox{$\mathsurround=0pt \mkern1.5mu ${\it .}$ \mkern1.5mu$}\hskip 1em plus 1fill}
3444 \def\primary #1{\line{#1\hfil}}
3446 \newskip\secondaryindent \secondaryindent=0.5cm
3447 \def\secondary#1#2{{%
3452 \noindent\hskip\secondaryindent\hbox{#1}\indexdotfill
3454 \pdfgettoks#2.\ \the\toksA % The page number ends the paragraph.
3461 % Define two-column mode, which we use to typeset indexes.
3462 % Adapted from the TeXbook, page 416, which is to say,
3463 % the manmac.tex format used to print the TeXbook itself.
3467 \newdimen\doublecolumnhsize
3469 \def\begindoublecolumns{\begingroup % ended by \enddoublecolumns
3470 % Grab any single-column material above us.
3473 % Here is a possibility not foreseen in manmac: if we accumulate a
3474 % whole lot of material, we might end up calling this \output
3475 % routine twice in a row (see the doublecol-lose test, which is
3476 % essentially a couple of indexes with @setchapternewpage off). In
3477 % that case we just ship out what is in \partialpage with the normal
3478 % output routine. Generally, \partialpage will be empty when this
3479 % runs and this will be a no-op. See the indexspread.tex test case.
3480 \ifvoid\partialpage \else
3481 \onepageout{\pagecontents\partialpage}%
3484 \global\setbox\partialpage = \vbox{%
3485 % Unvbox the main output page.
3487 \kern-\topskip \kern\baselineskip
3490 \eject % run that output routine to set \partialpage
3492 % Use the double-column output routine for subsequent pages.
3493 \output = {\doublecolumnout}%
3495 % Change the page size parameters. We could do this once outside this
3496 % routine, in each of @smallbook, @afourpaper, and the default 8.5x11
3497 % format, but then we repeat the same computation. Repeating a couple
3498 % of assignments once per index is clearly meaningless for the
3499 % execution time, so we may as well do it in one place.
3501 % First we halve the line length, less a little for the gutter between
3502 % the columns. We compute the gutter based on the line length, so it
3503 % changes automatically with the paper format. The magic constant
3504 % below is chosen so that the gutter has the same value (well, +-<1pt)
3505 % as it did when we hard-coded it.
3507 % We put the result in a separate register, \doublecolumhsize, so we
3508 % can restore it in \pagesofar, after \hsize itself has (potentially)
3511 \doublecolumnhsize = \hsize
3512 \advance\doublecolumnhsize by -.04154\hsize
3513 \divide\doublecolumnhsize by 2
3514 \hsize = \doublecolumnhsize
3516 % Double the \vsize as well. (We don't need a separate register here,
3517 % since nobody clobbers \vsize.)
3521 % The double-column output routine for all double-column pages except
3524 \def\doublecolumnout{%
3525 \splittopskip=\topskip \splitmaxdepth=\maxdepth
3526 % Get the available space for the double columns -- the normal
3527 % (undoubled) page height minus any material left over from the
3531 \advance\dimen@ by -\ht\partialpage
3533 % box0 will be the left-hand column, box2 the right.
3534 \setbox0=\vsplit255 to\dimen@ \setbox2=\vsplit255 to\dimen@
3535 \onepageout\pagesofar
3537 \penalty\outputpenalty
3540 % Re-output the contents of the output page -- any previous material,
3541 % followed by the two boxes we just split, in box0 and box2.
3545 \hsize = \doublecolumnhsize
3546 \wd0=\hsize \wd2=\hsize
3547 \hbox to\pagewidth{\box0\hfil\box2}%
3550 % All done with double columns.
3551 \def\enddoublecolumns{%
3553 % Split the last of the double-column material. Leave it on the
3554 % current page, no automatic page break.
3557 % If we end up splitting too much material for the current page,
3558 % though, there will be another page break right after this \output
3559 % invocation ends. Having called \balancecolumns once, we do not
3560 % want to call it again. Therefore, reset \output to its normal
3561 % definition right away. (We hope \balancecolumns will never be
3562 % called on to balance too much material, but if it is, this makes
3563 % the output somewhat more palatable.)
3564 \global\output = {\onepageout{\pagecontents\PAGE}}%
3567 \endgroup % started in \begindoublecolumns
3569 % \pagegoal was set to the doubled \vsize above, since we restarted
3570 % the current page. We're now back to normal single-column
3571 % typesetting, so reset \pagegoal to the normal \vsize (after the
3572 % \endgroup where \vsize got restored).
3576 % Called at the end of the double column material.
3577 \def\balancecolumns{%
3578 \setbox0 = \vbox{\unvbox255}% like \box255 but more efficient, see p.120.
3580 \advance\dimen@ by \topskip
3581 \advance\dimen@ by-\baselineskip
3582 \divide\dimen@ by 2 % target to split to
3583 %debug\message{final 2-column material height=\the\ht0, target=\the\dimen@.}%
3584 \splittopskip = \topskip
3585 % Loop until we get a decent breakpoint.
3589 \global\setbox3 = \copy0
3590 \global\setbox1 = \vsplit3 to \dimen@
3592 \global\advance\dimen@ by 1pt
3595 %debug\message{split to \the\dimen@, column heights: \the\ht1, \the\ht3.}%
3596 \setbox0=\vbox to\dimen@{\unvbox1}%
3597 \setbox2=\vbox to\dimen@{\unvbox3}%
3601 \catcode`\@ = \other
3604 \message{sectioning,}
3605 % Chapters, sections, etc.
3607 % \unnumberedno is an oxymoron, of course. But we count the unnumbered
3608 % sections so that we can refer to them unambiguously in the pdf
3609 % outlines by their "section number". We avoid collisions with chapter
3610 % numbers by starting them at 10000. (If a document ever has 10000
3611 % chapters, we're in trouble anyway, I'm sure.)
3612 \newcount\unnumberedno \unnumberedno = 10000
3614 \newcount\secno \secno=0
3615 \newcount\subsecno \subsecno=0
3616 \newcount\subsubsecno \subsubsecno=0
3618 % This counter is funny since it counts through charcodes of letters A, B, ...
3619 \newcount\appendixno \appendixno = `\@
3621 % \def\appendixletter{\char\the\appendixno}
3622 % We do the following ugly conditional instead of the above simple
3623 % construct for the sake of pdftex, which needs the actual
3624 % letter in the expansion, not just typeset.
3626 \def\appendixletter{%
3627 \ifnum\appendixno=`A A%
3628 \else\ifnum\appendixno=`B B%
3629 \else\ifnum\appendixno=`C C%
3630 \else\ifnum\appendixno=`D D%
3631 \else\ifnum\appendixno=`E E%
3632 \else\ifnum\appendixno=`F F%
3633 \else\ifnum\appendixno=`G G%
3634 \else\ifnum\appendixno=`H H%
3635 \else\ifnum\appendixno=`I I%
3636 \else\ifnum\appendixno=`J J%
3637 \else\ifnum\appendixno=`K K%
3638 \else\ifnum\appendixno=`L L%
3639 \else\ifnum\appendixno=`M M%
3640 \else\ifnum\appendixno=`N N%
3641 \else\ifnum\appendixno=`O O%
3642 \else\ifnum\appendixno=`P P%
3643 \else\ifnum\appendixno=`Q Q%
3644 \else\ifnum\appendixno=`R R%
3645 \else\ifnum\appendixno=`S S%
3646 \else\ifnum\appendixno=`T T%
3647 \else\ifnum\appendixno=`U U%
3648 \else\ifnum\appendixno=`V V%
3649 \else\ifnum\appendixno=`W W%
3650 \else\ifnum\appendixno=`X X%
3651 \else\ifnum\appendixno=`Y Y%
3652 \else\ifnum\appendixno=`Z Z%
3653 % The \the is necessary, despite appearances, because \appendixletter is
3654 % expanded while writing the .toc file. \char\appendixno is not
3655 % expandable, thus it is written literally, thus all appendixes come out
3656 % with the same letter (or @) in the toc without it.
3657 \else\char\the\appendixno
3658 \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
3659 \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi}
3661 % Each @chapter defines this as the name of the chapter.
3662 % page headings and footings can use it. @section does likewise.
3663 % However, they are not reliable, because we don't use marks.
3667 \newcount\absseclevel % used to calculate proper heading level
3668 \newcount\secbase\secbase=0 % @raisesections/@lowersections modify this count
3670 % @raisesections: treat @section as chapter, @subsection as section, etc.
3671 \def\raisesections{\global\advance\secbase by -1}
3672 \let\up=\raisesections % original BFox name
3674 % @lowersections: treat @chapter as section, @section as subsection, etc.
3675 \def\lowersections{\global\advance\secbase by 1}
3676 \let\down=\lowersections % original BFox name
3678 % Choose a numbered-heading macro
3679 % #1 is heading level if unmodified by @raisesections or @lowersections
3680 % #2 is text for heading
3681 \def\numhead#1#2{\absseclevel=\secbase\advance\absseclevel by #1
3685 \or \numberedsubseczzz{#2}%
3686 \or \numberedsubsubseczzz{#2}%
3688 \ifnum \absseclevel<0 \chapterzzz{#2}%
3689 \else \numberedsubsubseczzz{#2}%
3692 \suppressfirstparagraphindent
3695 % like \numhead, but chooses appendix heading levels
3696 \def\apphead#1#2{\absseclevel=\secbase\advance\absseclevel by #1
3699 \or \appendixsectionzzz{#2}%
3700 \or \appendixsubseczzz{#2}%
3701 \or \appendixsubsubseczzz{#2}%
3703 \ifnum \absseclevel<0 \appendixzzz{#2}%
3704 \else \appendixsubsubseczzz{#2}%
3707 \suppressfirstparagraphindent
3710 % like \numhead, but chooses numberless heading levels
3711 \def\unnmhead#1#2{\absseclevel=\secbase\advance\absseclevel by #1
3714 \or \unnumberedseczzz{#2}%
3715 \or \unnumberedsubseczzz{#2}%
3716 \or \unnumberedsubsubseczzz{#2}%
3718 \ifnum \absseclevel<0 \unnumberedzzz{#2}%
3719 \else \unnumberedsubsubseczzz{#2}%
3722 \suppressfirstparagraphindent
3725 % @chapter, @appendix, @unnumbered.
3727 \outer\def\chapter{\parsearg\chapteryyy}
3728 \def\chapteryyy#1{\numhead0{#1}} % normally numhead0 calls chapterzzz
3730 % section resetting is \global in case the chapter is in a group, such
3731 % as an @include file.
3732 \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
3733 \global\advance\chapno by 1
3734 \message{\putwordChapter\space \the\chapno}%
3736 % Write the actual heading.
3737 \chapmacro{#1}{Ynumbered}{\the\chapno}%
3739 % So @section and the like are numbered underneath this chapter.
3740 \global\let\section = \numberedsec
3741 \global\let\subsection = \numberedsubsec
3742 \global\let\subsubsection = \numberedsubsubsec
3745 \outer\def\appendix{\parsearg\appendixyyy}
3746 \def\appendixyyy#1{\apphead0{#1}} % normally apphead0 calls appendixzzz
3747 \def\appendixzzz#1{%
3748 \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
3749 \global\advance\appendixno by 1
3750 \def\appendixnum{\putwordAppendix\space \appendixletter}%
3751 \message{\appendixnum}%
3752 \chapmacro{#1}{Yappendix}{\appendixletter}%
3753 \global\let\section = \appendixsec
3754 \global\let\subsection = \appendixsubsec
3755 \global\let\subsubsection = \appendixsubsubsec
3758 % @centerchap is like @unnumbered, but the heading is centered.
3759 \outer\def\centerchap{\parsearg\centerchapyyy}
3760 \def\centerchapyyy#1{{\unnumberedyyy{#1}}}
3762 % @top is like @unnumbered.
3763 \outer\def\top{\parsearg\unnumberedyyy}
3765 \outer\def\unnumbered{\parsearg\unnumberedyyy}
3766 \def\unnumberedyyy#1{\unnmhead0{#1}} % normally unnmhead0 calls unnumberedzzz
3767 \def\unnumberedzzz#1{%
3768 \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
3769 \global\advance\unnumberedno by 1
3771 % This used to be simply \message{#1}, but TeX fully expands the
3772 % argument to \message. Therefore, if #1 contained @-commands, TeX
3773 % expanded them. For example, in `@unnumbered The @cite{Book}', TeX
3774 % expanded @cite (which turns out to cause errors because \cite is meant
3775 % to be executed, not expanded).
3777 % Anyway, we don't want the fully-expanded definition of @cite to appear
3778 % as a result of the \message, we just want `@cite' itself. We use
3779 % \the<toks register> to achieve this: TeX expands \the<toks> only once,
3780 % simply yielding the contents of <toks register>. (We also do this for
3782 \toks0 = {#1}\message{(\the\toks0)}%
3784 \chapmacro{#1}{Ynothing}{\the\unnumberedno}%
3786 \global\let\section = \unnumberedsec
3787 \global\let\subsection = \unnumberedsubsec
3788 \global\let\subsubsection = \unnumberedsubsubsec
3792 \outer\def\numberedsec{\parsearg\secyyy}
3793 \def\secyyy#1{\numhead1{#1}} % normally calls seczzz
3795 \global\subsecno=0 \global\subsubsecno=0 \global\advance\secno by 1
3796 \sectionheading{#1}{sec}{Ynumbered}{\the\chapno.\the\secno}%
3799 \outer\def\appendixsection{\parsearg\appendixsecyyy}
3800 \outer\def\appendixsec{\parsearg\appendixsecyyy}
3801 \def\appendixsecyyy#1{\apphead1{#1}} % normally calls appendixsectionzzz
3802 \def\appendixsectionzzz#1{%
3803 \global\subsecno=0 \global\subsubsecno=0 \global\advance\secno by 1
3804 \sectionheading{#1}{sec}{Yappendix}{\appendixletter.\the\secno}%
3807 \outer\def\unnumberedsec{\parsearg\unnumberedsecyyy}
3808 \def\unnumberedsecyyy#1{\unnmhead1{#1}} % normally calls unnumberedseczzz
3809 \def\unnumberedseczzz#1{%
3810 \global\subsecno=0 \global\subsubsecno=0 \global\advance\secno by 1
3811 \sectionheading{#1}{sec}{Ynothing}{\the\unnumberedno.\the\secno}%
3815 \outer\def\numberedsubsec{\parsearg\numberedsubsecyyy}
3816 \def\numberedsubsecyyy#1{\numhead2{#1}} % normally calls numberedsubseczzz
3817 \def\numberedsubseczzz#1{%
3818 \global\subsubsecno=0 \global\advance\subsecno by 1
3819 \sectionheading{#1}{subsec}{Ynumbered}{\the\chapno.\the\secno.\the\subsecno}%
3822 \outer\def\appendixsubsec{\parsearg\appendixsubsecyyy}
3823 \def\appendixsubsecyyy#1{\apphead2{#1}} % normally calls appendixsubseczzz
3824 \def\appendixsubseczzz#1{%
3825 \global\subsubsecno=0 \global\advance\subsecno by 1
3826 \sectionheading{#1}{subsec}{Yappendix}%
3827 {\appendixletter.\the\secno.\the\subsecno}%
3830 \outer\def\unnumberedsubsec{\parsearg\unnumberedsubsecyyy}
3831 \def\unnumberedsubsecyyy#1{\unnmhead2{#1}} %normally calls unnumberedsubseczzz
3832 \def\unnumberedsubseczzz#1{%
3833 \global\subsubsecno=0 \global\advance\subsecno by 1
3834 \sectionheading{#1}{subsec}{Ynothing}%
3835 {\the\unnumberedno.\the\secno.\the\subsecno}%
3839 \outer\def\numberedsubsubsec{\parsearg\numberedsubsubsecyyy}
3840 \def\numberedsubsubsecyyy#1{\numhead3{#1}} % normally numberedsubsubseczzz
3841 \def\numberedsubsubseczzz#1{%
3842 \global\advance\subsubsecno by 1
3843 \sectionheading{#1}{subsubsec}{Ynumbered}%
3844 {\the\chapno.\the\secno.\the\subsecno.\the\subsubsecno}%
3847 \outer\def\appendixsubsubsec{\parsearg\appendixsubsubsecyyy}
3848 \def\appendixsubsubsecyyy#1{\apphead3{#1}} % normally appendixsubsubseczzz
3849 \def\appendixsubsubseczzz#1{%
3850 \global\advance\subsubsecno by 1
3851 \sectionheading{#1}{subsubsec}{Yappendix}%
3852 {\appendixletter.\the\secno.\the\subsecno.\the\subsubsecno}%
3855 \outer\def\unnumberedsubsubsec{\parsearg\unnumberedsubsubsecyyy}
3856 \def\unnumberedsubsubsecyyy#1{\unnmhead3{#1}} %normally unnumberedsubsubseczzz
3857 \def\unnumberedsubsubseczzz#1{%
3858 \global\advance\subsubsecno by 1
3859 \sectionheading{#1}{subsubsec}{Ynothing}%
3860 {\the\unnumberedno.\the\secno.\the\subsecno.\the\subsubsecno}%
3863 % These are variants which are not "outer", so they can appear in @ifinfo.
3864 % Actually, they are now be obsolete; ordinary section commands should work.
3865 \def\infotop{\parsearg\unnumberedzzz}
3866 \def\infounnumbered{\parsearg\unnumberedzzz}
3867 \def\infounnumberedsec{\parsearg\unnumberedseczzz}
3868 \def\infounnumberedsubsec{\parsearg\unnumberedsubseczzz}
3869 \def\infounnumberedsubsubsec{\parsearg\unnumberedsubsubseczzz}
3871 \def\infoappendix{\parsearg\appendixzzz}
3872 \def\infoappendixsec{\parsearg\appendixseczzz}
3873 \def\infoappendixsubsec{\parsearg\appendixsubseczzz}
3874 \def\infoappendixsubsubsec{\parsearg\appendixsubsubseczzz}
3876 \def\infochapter{\parsearg\chapterzzz}
3877 \def\infosection{\parsearg\sectionzzz}
3878 \def\infosubsection{\parsearg\subsectionzzz}
3879 \def\infosubsubsection{\parsearg\subsubsectionzzz}
3881 % These macros control what the section commands do, according
3882 % to what kind of chapter we are in (ordinary, appendix, or unnumbered).
3883 % Define them by default for a numbered chapter.
3884 \let\section = \numberedsec
3885 \let\subsection = \numberedsubsec
3886 \let\subsubsection = \numberedsubsubsec
3888 % Define @majorheading, @heading and @subheading
3890 % NOTE on use of \vbox for chapter headings, section headings, and such:
3891 % 1) We use \vbox rather than the earlier \line to permit
3892 % overlong headings to fold.
3893 % 2) \hyphenpenalty is set to 10000 because hyphenation in a
3894 % heading is obnoxious; this forbids it.
3895 % 3) Likewise, headings look best if no \parindent is used, and
3896 % if justification is not attempted. Hence \raggedright.
3900 {\advance\chapheadingskip by 10pt \chapbreak }%
3901 \parsearg\chapheadingzzz
3904 \def\chapheading{\chapbreak \parsearg\chapheadingzzz}
3905 \def\chapheadingzzz#1{%
3906 {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
3907 \parindent=0pt\raggedright
3909 \bigskip \par\penalty 200\relax
3910 \suppressfirstparagraphindent
3913 % @heading, @subheading, @subsubheading.
3914 \def\heading{\parsearg\doheading}
3915 \def\subheading{\parsearg\dosubheading}
3916 \def\subsubheading{\parsearg\dosubsubheading}
3917 \def\doheading#1{\sectionheading{#1}{sec}{Yomitfromtoc}{}
3918 \suppressfirstparagraphindent}
3919 \def\dosubheading#1{\sectionheading{#1}{subsec}{Yomitfromtoc}{}
3920 \suppressfirstparagraphindent}
3921 \def\dosubsubheading#1{\sectionheading{#1}{subsubsec}{Yomitfromtoc}{}
3922 \suppressfirstparagraphindent}
3924 % These macros generate a chapter, section, etc. heading only
3925 % (including whitespace, linebreaking, etc. around it),
3926 % given all the information in convenient, parsed form.
3928 %%% Args are the skip and penalty (usually negative)
3929 \def\dobreak#1#2{\par\ifdim\lastskip<#1\removelastskip\penalty#2\vskip#1\fi}
3931 \def\setchapterstyle #1 {\csname CHAPF#1\endcsname}
3933 %%% Define plain chapter starts, and page on/off switching for it
3934 % Parameter controlling skip before chapter headings (if needed)
3936 \newskip\chapheadingskip
3938 \def\chapbreak{\dobreak \chapheadingskip {-4000}}
3939 \def\chappager{\par\vfill\supereject}
3940 \def\chapoddpage{\chappager \ifodd\pageno \else \hbox to 0pt{} \chappager\fi}
3942 \def\setchapternewpage #1 {\csname CHAPPAG#1\endcsname}
3945 \global\let\contentsalignmacro = \chappager
3946 \global\let\pchapsepmacro=\chapbreak
3947 \global\let\pagealignmacro=\chappager}
3950 \global\let\contentsalignmacro = \chappager
3951 \global\let\pchapsepmacro=\chappager
3952 \global\let\pagealignmacro=\chappager
3953 \global\def\HEADINGSon{\HEADINGSsingle}}
3956 \global\let\contentsalignmacro = \chapoddpage
3957 \global\let\pchapsepmacro=\chapoddpage
3958 \global\let\pagealignmacro=\chapoddpage
3959 \global\def\HEADINGSon{\HEADINGSdouble}}
3964 \global\let\chapmacro=\chfplain
3965 \global\let\centerchapmacro=\centerchfplain}
3967 % Normal chapter opening.
3969 % #1 is the text, #2 is the section type (Ynumbered, Ynothing,
3970 % Yappendix, Yomitfromtoc), #3 the chapter number.
3972 % To test against our argument.
3973 \def\Ynothingkeyword{Ynothing}
3974 \def\Yomitfromtockeyword{Yomitfromtoc}
3975 \def\Yappendixkeyword{Yappendix}
3977 \def\chfplain#1#2#3{%
3982 % Have to define \thissection before calling \donoderef, because the
3983 % xref code eventually uses it. On the other hand, it has to be called
3984 % after \pchapsepmacro, or the headline will change too soon.
3985 \gdef\thissection{#1}%
3986 \gdef\thischaptername{#1}%
3988 % Only insert the separating space if we have a chapter/appendix
3989 % number, and don't print the unnumbered ``number''.
3991 \ifx\temptype\Ynothingkeyword
3993 \def\toctype{unnchap}%
3994 \def\thischapter{#1}%
3995 \else\ifx\temptype\Yomitfromtockeyword
3996 \setbox0 = \hbox{}% contents like unnumbered, but no toc entry
3998 \xdef\thischapter{}%
3999 \else\ifx\temptype\Yappendixkeyword
4000 \setbox0 = \hbox{\putwordAppendix{} #3\enspace}%
4002 % We don't substitute the actual chapter name into \thischapter
4003 % because we don't want its macros evaluated now. And we don't
4004 % use \thissection because that changes with each section.
4006 \xdef\thischapter{\putwordAppendix{} \appendixletter:
4007 \noexpand\thischaptername}%
4009 \setbox0 = \hbox{#3\enspace}%
4010 \def\toctype{numchap}%
4011 \xdef\thischapter{\putwordChapter{} \the\chapno:
4012 \noexpand\thischaptername}%
4015 % Write the toc entry for this chapter. Must come before the
4016 % \donoderef, because we include the current node name in the toc
4017 % entry, and \donoderef resets it to empty.
4018 \writetocentry{\toctype}{#1}{#3}%
4020 % For pdftex, we have to write out the node definition (aka, make
4021 % the pdfdest) after any page break, but before the actual text has
4022 % been typeset. If the destination for the pdf outline is after the
4023 % text, then jumping from the outline may wind up with the text not
4024 % being visible, for instance under high magnification.
4027 % Typeset the actual heading.
4028 \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \raggedright
4029 \hangindent=\wd0 \centerparametersmaybe
4032 \nobreak\bigskip % no page break after a chapter title
4036 % @centerchap -- centered and unnumbered.
4037 \let\centerparametersmaybe = \relax
4038 \def\centerchfplain#1{{%
4039 \def\centerparametersmaybe{%
4040 \advance\rightskip by 3\rightskip
4041 \leftskip = \rightskip
4044 \chfplain{#1}{Ynothing}{}%
4047 \CHAPFplain % The default
4049 % I don't think this chapter style is supported any more, so I'm not
4050 % updating it with the new noderef stuff. We'll see. --karl, 11aug03.
4052 \def\unnchfopen #1{%
4053 \chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
4054 \parindent=0pt\raggedright
4055 \rm #1\hfill}}\bigskip \par\nobreak
4058 \def\chfopen #1#2{\chapoddpage {\chapfonts
4059 \vbox to 3in{\vfil \hbox to\hsize{\hfil #2} \hbox to\hsize{\hfil #1} \vfil}}%
4063 \def\centerchfopen #1{%
4064 \chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
4066 \hfill {\rm #1}\hfill}}\bigskip \par\nobreak
4070 \global\let\chapmacro=\chfopen
4071 \global\let\centerchapmacro=\centerchfopen}
4074 % Section titles. These macros combine the section number parts and
4075 % call the generic \sectionheading to do the printing.
4077 \newskip\secheadingskip
4078 \def\secheadingbreak{\dobreak \secheadingskip{-1000}}
4080 % Subsection titles.
4081 \newskip\subsecheadingskip
4082 \def\subsecheadingbreak{\dobreak \subsecheadingskip{-500}}
4084 % Subsubsection titles.
4085 \def\subsubsecheadingskip{\subsecheadingskip}
4086 \def\subsubsecheadingbreak{\subsecheadingbreak}
4089 % Print any size, any type, section title.
4091 % #1 is the text, #2 is the section level (sec/subsec/subsubsec), #3 is
4092 % the section type for xrefs (Ynumbered, Ynothing, Yappendix), #4 is the
4095 \def\sectionheading#1#2#3#4{%
4097 % Switch to the right set of fonts.
4098 \csname #2fonts\endcsname \rm
4100 % Insert space above the heading.
4101 \csname #2headingbreak\endcsname
4103 % Only insert the space after the number if we have a section number.
4104 \def\sectionlevel{#2}%
4107 \ifx\temptype\Ynothingkeyword
4110 \gdef\thissection{#1}%
4111 \else\ifx\temptype\Yomitfromtockeyword
4112 % for @headings -- no section number, don't include in toc,
4113 % and don't redefine \thissection.
4116 \let\sectionlevel=\empty
4117 \else\ifx\temptype\Yappendixkeyword
4118 \setbox0 = \hbox{#4\enspace}%
4120 \gdef\thissection{#1}%
4122 \setbox0 = \hbox{#4\enspace}%
4124 \gdef\thissection{#1}%
4127 % Write the toc entry (before \donoderef). See comments in \chfplain.
4128 \writetocentry{\toctype\sectionlevel}{#1}{#4}%
4130 % Write the node reference (= pdf destination for pdftex).
4131 % Again, see comments in \chfplain.
4134 % Output the actual section heading.
4135 \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \raggedright
4136 \hangindent=\wd0 % zero if no section number
4139 % Add extra space after the heading -- half of whatever came above it.
4140 % Don't allow stretch, though.
4141 \kern .5 \csname #2headingskip\endcsname
4143 % Do not let the kern be a potential breakpoint, as it would be if it
4144 % was followed by glue.
4147 % We'll almost certainly start a paragraph next, so don't let that
4148 % glue accumulate. (Not a breakpoint because it's preceded by a
4149 % discardable item.)
4152 % This \nobreak is purely so the last item on the list is a \penalty
4153 % of 10000. This is so other code, for instance \parsebodycommon, can
4154 % check for and avoid allowing breakpoints. Otherwise, it would
4155 % insert a valid breakpoint between:
4156 % @section sec-whatever
4157 % @deffn def-whatever
4163 % Table of contents.
4166 % Write an entry to the toc file, opening it if necessary.
4167 % Called from @chapter, etc.
4169 % Example usage: \writetocentry{sec}{Section Name}{\the\chapno.\the\secno}
4170 % We append the current node name (if any) and page number as additional
4171 % arguments for the \{chap,sec,...}entry macros which will eventually
4172 % read this. The node name is used in the pdf outlines as the
4173 % destination to jump to.
4175 % We open the .toc file for writing here instead of at @setfilename (or
4176 % any other fixed time) so that @contents can be anywhere in the document.
4177 % But if #1 is `omit', then we don't do anything. This is used for the
4178 % table of contents chapter openings themselves.
4180 \newif\iftocfileopened
4181 \def\omitkeyword{omit}%
4183 \def\writetocentry#1#2#3{%
4184 \edef\writetoctype{#1}%
4185 \ifx\writetoctype\omitkeyword \else
4186 \iftocfileopened\else
4187 \immediate\openout\tocfile = \jobname.toc
4188 \global\tocfileopenedtrue
4193 \toks2 = \expandafter{\lastnode}%
4194 \edef\temp{\write\tocfile{\realbackslash #1entry{\the\toks0}{#3}%
4195 {\the\toks2}{\noexpand\folio}}}%
4200 % Tell \shipout to create a pdf destination on each page, if we're
4201 % writing pdf. These are used in the table of contents. We can't
4202 % just write one on every page because the title pages are numbered
4203 % 1 and 2 (the page numbers aren't printed), and so are the first
4204 % two pages of the document. Thus, we'd have two destinations named
4205 % `1', and two named `2'.
4206 \ifpdf \global\pdfmakepagedesttrue \fi
4209 \newskip\contentsrightmargin \contentsrightmargin=1in
4210 \newcount\savepageno
4211 \newcount\lastnegativepageno \lastnegativepageno = -1
4213 % Prepare to read what we've written to \tocfile.
4215 \def\startcontents#1{%
4216 % If @setchapternewpage on, and @headings double, the contents should
4217 % start on an odd page, unlike chapters. Thus, we maintain
4218 % \contentsalignmacro in parallel with \pagealignmacro.
4219 % From: Torbjorn Granlund <tege@matematik.su.se>
4221 \immediate\closeout\tocfile
4223 % Don't need to put `Contents' or `Short Contents' in the headline.
4224 % It is abundantly clear what they are.
4226 \chapmacro{#1}{Yomitfromtoc}{}%
4228 \savepageno = \pageno
4229 \begingroup % Set up to handle contents files properly.
4230 \catcode`\\=0 \catcode`\{=1 \catcode`\}=2 \catcode`\@=11
4231 % We can't do this, because then an actual ^ in a section
4232 % title fails, e.g., @chapter ^ -- exponentiation. --karl, 9jul97.
4233 %\catcode`\^=7 % to see ^^e4 as \"a etc. juha@piuha.ydi.vtt.fi
4234 \raggedbottom % Worry more about breakpoints than the bottom.
4235 \advance\hsize by -\contentsrightmargin % Don't use the full line length.
4237 % Roman numerals for page numbers.
4238 \ifnum \pageno>0 \global\pageno = \lastnegativepageno \fi
4242 % Normal (long) toc.
4244 \startcontents{\putwordTOC}%
4245 \openin 1 \jobname.toc
4251 \contentsalignmacro % in case @setchapternewpage odd is in effect
4254 \lastnegativepageno = \pageno
4255 \global\pageno = \savepageno
4258 % And just the chapters.
4259 \def\summarycontents{%
4260 \startcontents{\putwordShortTOC}%
4262 \let\numchapentry = \shortchapentry
4263 \let\appentry = \shortchapentry
4264 \let\unnchapentry = \shortunnchapentry
4265 % We want a true roman here for the page numbers.
4267 \let\rm=\shortcontrm \let\bf=\shortcontbf
4268 \let\sl=\shortcontsl \let\tt=\shortconttt
4270 \hyphenpenalty = 10000
4271 \advance\baselineskip by 1pt % Open it up a little.
4272 \def\numsecentry##1##2##3##4{}
4273 \let\appsecentry = \numsecentry
4274 \let\unnsecentry = \numsecentry
4275 \let\numsubsecentry = \numsecentry
4276 \let\appsubsecentry = \numsecentry
4277 \let\unnsubsecentry = \numsecentry
4278 \let\numsubsubsecentry = \numsecentry
4279 \let\appsubsubsecentry = \numsecentry
4280 \let\unnsubsubsecentry = \numsecentry
4281 \openin 1 \jobname.toc
4287 \contentsalignmacro % in case @setchapternewpage odd is in effect
4289 \lastnegativepageno = \pageno
4290 \global\pageno = \savepageno
4292 \let\shortcontents = \summarycontents
4294 % Typeset the label for a chapter or appendix for the short contents.
4295 % The arg is, e.g., `A' for an appendix, or `3' for a chapter.
4297 \def\shortchaplabel#1{%
4298 % This space should be enough, since a single number is .5em, and the
4299 % widest letter (M) is 1em, at least in the Computer Modern fonts.
4300 % But use \hss just in case.
4301 % (This space doesn't include the extra space that gets added after
4302 % the label; that gets put in by \shortchapentry above.)
4304 % We'd like to right-justify chapter numbers, but that looks strange
4305 % with appendix letters. And right-justifying numbers and
4306 % left-justifying letters looks strange when there is less than 10
4307 % chapters. Have to read the whole toc once to know how many chapters
4308 % there are before deciding ...
4309 \hbox to 1em{#1\hss}%
4312 % These macros generate individual entries in the table of contents.
4313 % The first argument is the chapter or section name.
4314 % The last argument is the page number.
4315 % The arguments in between are the chapter number, section number, ...
4317 % Chapters, in the main contents.
4318 \def\numchapentry#1#2#3#4{\dochapentry{#2\labelspace#1}{#4}}
4320 % Chapters, in the short toc.
4321 % See comments in \dochapentry re vbox and related settings.
4322 \def\shortchapentry#1#2#3#4{%
4323 \tocentry{\shortchaplabel{#2}\labelspace #1}{\doshortpageno\bgroup#4\egroup}%
4326 % Appendices, in the main contents.
4327 % Need the word Appendix, and a fixed-size box.
4329 \def\appendixbox#1{%
4330 % We use M since it's probably the widest letter.
4331 \setbox0 = \hbox{\putwordAppendix{} M}%
4332 \hbox to \wd0{\putwordAppendix{} #1\hss}}
4334 \def\appentry#1#2#3#4{\dochapentry{\appendixbox{#2}\labelspace#1}{#4}}
4336 % Unnumbered chapters.
4337 \def\unnchapentry#1#2#3#4{\dochapentry{#1}{#4}}
4338 \def\shortunnchapentry#1#2#3#4{\tocentry{#1}{\doshortpageno\bgroup#4\egroup}}
4341 \def\numsecentry#1#2#3#4{\dosecentry{#2\labelspace#1}{#4}}
4342 \let\appsecentry=\numsecentry
4343 \def\unnsecentry#1#2#3#4{\dosecentry{#1}{#4}}
4346 \def\numsubsecentry#1#2#3#4{\dosubsecentry{#2\labelspace#1}{#4}}
4347 \let\appsubsecentry=\numsubsecentry
4348 \def\unnsubsecentry#1#2#3#4{\dosubsecentry{#1}{#4}}
4350 % And subsubsections.
4351 \def\numsubsubsecentry#1#2#3#4{\dosubsubsecentry{#2\labelspace#1}{#4}}
4352 \let\appsubsubsecentry=\numsubsubsecentry
4353 \def\unnsubsubsecentry#1#2#3#4{\dosubsubsecentry{#1}{#4}}
4355 % This parameter controls the indentation of the various levels.
4356 \newdimen\tocindent \tocindent = 2pc
4358 % Now for the actual typesetting. In all these, #1 is the text and #2 is the
4361 % If the toc has to be broken over pages, we want it to be at chapters
4362 % if at all possible; hence the \penalty.
4363 \def\dochapentry#1#2{%
4364 \penalty-300 \vskip1\baselineskip plus.33\baselineskip minus.25\baselineskip
4367 \tocentry{#1}{\dopageno\bgroup#2\egroup}%
4369 \nobreak\vskip .25\baselineskip plus.1\baselineskip
4372 \def\dosecentry#1#2{\begingroup
4373 \secentryfonts \leftskip=\tocindent
4374 \tocentry{#1}{\dopageno\bgroup#2\egroup}%
4377 \def\dosubsecentry#1#2{\begingroup
4378 \subsecentryfonts \leftskip=2\tocindent
4379 \tocentry{#1}{\dopageno\bgroup#2\egroup}%
4382 \def\dosubsubsecentry#1#2{\begingroup
4383 \subsubsecentryfonts \leftskip=3\tocindent
4384 \tocentry{#1}{\dopageno\bgroup#2\egroup}%
4387 % Final typesetting of a toc entry; we use the same \entry macro as for
4388 % the index entries, but we want to suppress hyphenation here. (We
4389 % can't do that in the \entry macro, since index entries might consist
4390 % of hyphenated-identifiers-that-do-not-fit-on-a-line-and-nothing-else.)
4391 \def\tocentry#1#2{\begingroup
4392 \vskip 0pt plus1pt % allow a little stretch for the sake of nice page breaks
4393 % Do not use \turnoffactive in these arguments. Since the toc is
4394 % typeset in cmr, characters such as _ would come out wrong; we
4395 % have to do the usual translation tricks.
4399 % Space between chapter (or whatever) number and the title.
4400 \def\labelspace{\hskip1em \relax}
4402 \def\dopageno#1{{\rm #1}}
4403 \def\doshortpageno#1{{\rm #1}}
4405 \def\chapentryfonts{\secfonts \rm}
4406 \def\secentryfonts{\textfonts}
4407 \def\subsecentryfonts{\textfonts}
4408 \def\subsubsecentryfonts{\textfonts}
4411 \message{environments,}
4412 % @foo ... @end foo.
4414 % @point{}, @result{}, @expansion{}, @print{}, @equiv{}.
4416 % Since these characters are used in examples, it should be an even number of
4417 % \tt widths. Each \tt character is 1en, so two makes it 1em.
4420 \def\result{\leavevmode\raise.15ex\hbox to 1em{\hfil$\Rightarrow$\hfil}}
4421 \def\expansion{\leavevmode\raise.1ex\hbox to 1em{\hfil$\mapsto$\hfil}}
4422 \def\print{\leavevmode\lower.1ex\hbox to 1em{\hfil$\dashv$\hfil}}
4423 \def\equiv{\leavevmode\lower.1ex\hbox to 1em{\hfil$\ptexequiv$\hfil}}
4425 % The @error{} command.
4426 % Adapted from the TeXbook's \boxit.
4430 {\tentt \global\dimen0 = 3em}% Width of the box.
4431 \dimen2 = .55pt % Thickness of rules
4432 % The text. (`r' is open on the right, `e' somewhat less so on the left.)
4433 \setbox0 = \hbox{\kern-.75pt \tensf error\kern-1.5pt}
4435 \global\setbox\errorbox=\hbox to \dimen0{\hfil
4436 \hsize = \dimen0 \advance\hsize by -5.8pt % Space to left+right.
4437 \advance\hsize by -2\dimen2 % Rules.
4439 \hrule height\dimen2
4440 \hbox{\vrule width\dimen2 \kern3pt % Space to left of text.
4441 \vtop{\kern2.4pt \box0 \kern2.4pt}% Space above/below.
4442 \kern3pt\vrule width\dimen2}% Space to right.
4443 \hrule height\dimen2}
4446 \def\error{\leavevmode\lower.7ex\copy\errorbox}
4448 % @tex ... @end tex escapes into raw Tex temporarily.
4449 % One exception: @ is still an escape character, so that @end tex works.
4450 % But \@ or @@ will get a plain tex @ character.
4452 \def\tex{\begingroup
4453 \catcode `\\=0 \catcode `\{=1 \catcode `\}=2
4454 \catcode `\$=3 \catcode `\&=4 \catcode `\#=6
4455 \catcode `\^=7 \catcode `\_=8 \catcode `\~=\active \let~=\tie
4466 \let\bullet=\ptexbullet
4471 \let\equiv=\ptexequiv
4474 \let\indent=\ptexindent
4475 \let\noindent=\ptexnoindent
4483 \def\endldots{\mathinner{\ldots\ldots\ldots\ldots}}%
4484 \def\enddots{\relax\ifmmode\endldots\else$\mathsurround=0pt \endldots\,$\fi}%
4486 \let\Etex=\endgroup}
4488 % Define @lisp ... @end lisp.
4489 % @lisp does a \begingroup so it can rebind things,
4490 % including the definition of @end lisp (which normally is erroneous).
4492 % Amount to narrow the margins by for @lisp.
4493 \newskip\lispnarrowing \lispnarrowing=0.4in
4495 % This is the definition that ^^M gets inside @lisp, @example, and other
4496 % such environments. \null is better than a space, since it doesn't
4498 \def\lisppar{\null\endgraf}
4500 % This space is always present above and below environments.
4501 \newskip\envskipamount \envskipamount = 0pt
4503 % Make spacing and below environment symmetrical. We use \parskip here
4504 % to help in doing that, since in @example-like environments \parskip
4505 % is reset to zero; thus the \afterenvbreak inserts no space -- but the
4506 % start of the next paragraph will insert \parskip.
4508 \def\aboveenvbreak{{%
4509 % =10000 instead of <10000 because of a special case in \itemzzz, q.v.
4510 \ifnum \lastpenalty=10000 \else
4511 \advance\envskipamount by \parskip
4513 \ifdim\lastskip<\envskipamount
4515 % it's not a good place to break if the last penalty was \nobreak
4517 \ifnum\lastpenalty>10000 \else \penalty-50 \fi
4518 \vskip\envskipamount
4523 \let\afterenvbreak = \aboveenvbreak
4525 % \nonarrowing is a flag. If "set", @lisp etc don't narrow margins.
4526 \let\nonarrowing=\relax
4528 % @cartouche ... @end cartouche: draw rectangle w/rounded corners around
4529 % environment contents.
4530 \font\circle=lcircle10
4532 \newdimen\cartouter\newdimen\cartinner
4533 \newskip\normbskip\newskip\normpskip\newskip\normlskip
4534 \circthick=\fontdimen8\circle
4536 \def\ctl{{\circle\char'013\hskip -6pt}}% 6pt from pl file: 1/2charwidth
4537 \def\ctr{{\hskip 6pt\circle\char'010}}
4538 \def\cbl{{\circle\char'012\hskip -6pt}}
4539 \def\cbr{{\hskip 6pt\circle\char'011}}
4540 \def\carttop{\hbox to \cartouter{\hskip\lskip
4541 \ctl\leaders\hrule height\circthick\hfil\ctr
4543 \def\cartbot{\hbox to \cartouter{\hskip\lskip
4544 \cbl\leaders\hrule height\circthick\hfil\cbr
4547 \newskip\lskip\newskip\rskip
4550 \par % can't be in the midst of a paragraph.
4552 \lskip=\leftskip \rskip=\rightskip
4553 \leftskip=0pt\rightskip=0pt %we want these *outside*.
4554 \cartinner=\hsize \advance\cartinner by-\lskip
4555 \advance\cartinner by-\rskip
4557 \advance\cartouter by 18.4pt % allow for 3pt kerns on either
4558 % side, and for 6pt waste from
4559 % each corner char, and rule thickness
4560 \normbskip=\baselineskip \normpskip=\parskip \normlskip=\lineskip
4561 % Flag to tell @lisp, etc., not to narrow margin.
4562 \let\nonarrowing=\comment
4564 \baselineskip=0pt\parskip=0pt\lineskip=0pt
4573 \baselineskip=\normbskip
4574 \lineskip=\normlskip
4590 % This macro is called at the beginning of all the @example variants,
4594 \inENV % This group ends at the end of the body
4595 \hfuzz = 12pt % Don't be fussy
4596 \sepspaces % Make spaces be word-separators rather than space tokens.
4597 \let\par = \lisppar % don't ignore blank lines
4598 \obeylines % each line of input is a line of output
4601 \emergencystretch = 0pt % don't try to avoid overfull boxes
4602 % @cartouche defines \nonarrowing to inhibit narrowing
4603 % at next level down.
4604 \ifx\nonarrowing\relax
4605 \advance \leftskip by \lispnarrowing
4606 \exdentamount=\lispnarrowing
4607 \let\exdent=\nofillexdent
4608 \let\nonarrowing=\relax
4612 % Define the \E... control sequence only if we are inside the particular
4613 % environment, so the error checking in \end will work.
4615 % To end an @example-like environment, we first end the paragraph (via
4616 % \afterenvbreak's vertical glue), and then the group. That way we keep
4617 % the zero \parskip that the environments set -- \parskip glue will be
4618 % inserted at the beginning of the next paragraph in the document, after
4621 \def\nonfillfinish{\afterenvbreak\endgroup}
4623 % @lisp: indented, narrowed, typewriter font.
4624 \def\lisp{\begingroup
4626 \let\Elisp = \nonfillfinish
4628 \let\kbdfont = \kbdexamplefont % Allow @kbd to do something special.
4629 \gobble % eat return
4632 % @example: Same as @lisp.
4633 \def\example{\begingroup \def\Eexample{\nonfillfinish\endgroup}\lisp}
4635 % @smallexample and @smalllisp: use smaller fonts.
4636 % Originally contributed by Pavel@xerox.
4637 \def\smalllisp{\begingroup
4638 \def\Esmalllisp{\nonfillfinish\endgroup}%
4639 \def\Esmallexample{\nonfillfinish\endgroup}%
4643 \let\smallexample = \smalllisp
4646 % @display: same as @lisp except keep current font.
4648 \def\display{\begingroup
4650 \let\Edisplay = \nonfillfinish
4654 % @smalldisplay: @display plus smaller fonts.
4656 \def\smalldisplay{\begingroup
4657 \def\Esmalldisplay{\nonfillfinish\endgroup}%
4658 \smallexamplefonts \rm
4662 % @format: same as @display except don't narrow margins.
4664 \def\format{\begingroup
4665 \let\nonarrowing = t
4667 \let\Eformat = \nonfillfinish
4671 % @smallformat: @format plus smaller fonts.
4673 \def\smallformat{\begingroup
4674 \def\Esmallformat{\nonfillfinish\endgroup}%
4675 \smallexamplefonts \rm
4679 % @flushleft (same as @format).
4681 \def\flushleft{\begingroup \def\Eflushleft{\nonfillfinish\endgroup}\format}
4685 \def\flushright{\begingroup
4686 \let\nonarrowing = t
4688 \let\Eflushright = \nonfillfinish
4689 \advance\leftskip by 0pt plus 1fill
4694 % @quotation does normal linebreaking (hence we can't use \nonfillstart)
4695 % and narrows the margins.
4697 \def\quotation{\parsearg\doquotation}
4698 \def\doquotation#1{%
4699 \begingroup\inENV %This group ends at the end of the @quotation body
4700 {\parskip=0pt \aboveenvbreak}% because \aboveenvbreak inserts \parskip
4702 % We have retained a nonzero parskip for the environment, since we're
4703 % doing normal filling. So to avoid extra space below the environment...
4704 \def\Equotation{\parskip = 0pt \nonfillfinish}%
4706 % @cartouche defines \nonarrowing to inhibit narrowing at next level down.
4707 \ifx\nonarrowing\relax
4708 \advance\leftskip by \lispnarrowing
4709 \advance\rightskip by \lispnarrowing
4710 \exdentamount = \lispnarrowing
4711 \let\nonarrowing = \relax
4714 % If we're given an argument, typeset it in bold with a colon after.
4716 \ifx\thearg\empty \else
4722 % LaTeX-like @verbatim...@end verbatim and @verb{<char>...<char>}
4723 % If we want to allow any <char> as delimiter,
4724 % we need the curly braces so that makeinfo sees the @verb command, eg:
4725 % `@verbx...x' would look like the '@verbx' command. --janneke@gnu.org
4727 % [Knuth]: Donald Ervin Knuth, 1996. The TeXbook.
4729 % [Knuth] p.344; only we need to do the other characters Texinfo sets
4730 % active too. Otherwise, they get lost as the first character on a
4733 \do\ \do\\\do\{\do\}\do\$\do\&%
4734 \do\#\do\^\do\^^K\do\_\do\^^A\do\%\do\~%
4735 \do\<\do\>\do\|\do\@\do+\do\"%
4739 \def\uncatcodespecials{%
4740 \def\do##1{\catcode`##1=12}\dospecials}
4742 % [Knuth] pp. 380,381,391
4743 % Disable Spanish ligatures ?` and !` of \tt font
4745 \catcode`\`=\active\gdef`{\relax\lq}
4748 % Setup for the @verb command.
4750 % Eight spaces for a tab
4752 \catcode`\^^I=\active
4753 \gdef\tabeightspaces{\catcode`\^^I=\active\def^^I{\ \ \ \ \ \ \ \ }}
4757 \tt % easiest (and conventionally used) font for verbatim
4758 \def\par{\leavevmode\endgraf}%
4761 % Respect line breaks,
4762 % print special symbols as themselves, and
4763 % make each space count
4764 % must do in this order:
4765 \obeylines \uncatcodespecials \sepspaces
4768 % Setup for the @verbatim environment
4770 % Real tab expansion
4771 \newdimen\tabw \setbox0=\hbox{\tt\space} \tabw=8\wd0 % tab amount
4773 \def\starttabbox{\setbox0=\hbox\bgroup}
4775 \catcode`\^^I=\active
4777 \catcode`\^^I=\active
4778 \def^^I{\leavevmode\egroup
4779 \dimen0=\wd0 % the width so far, or since the previous tab
4780 \divide\dimen0 by\tabw
4781 \multiply\dimen0 by\tabw % compute previous multiple of \tabw
4782 \advance\dimen0 by\tabw % advance to next multiple of \tabw
4783 \wd0=\dimen0 \box0 \starttabbox
4787 \def\setupverbatim{%
4788 % Easiest (and conventionally used) font for verbatim
4790 \def\par{\leavevmode\egroup\box0\endgraf}%
4793 % Respect line breaks,
4794 % print special symbols as themselves, and
4795 % make each space count
4796 % must do in this order:
4797 \obeylines \uncatcodespecials \sepspaces
4798 \everypar{\starttabbox}%
4801 % Do the @verb magic: verbatim text is quoted by unique
4802 % delimiter characters. Before first delimiter expect a
4803 % right brace, after last delimiter expect closing brace:
4805 % \def\doverb'{'<char>#1<char>'}'{#1}
4807 % [Knuth] p. 382; only eat outer {}
4809 \catcode`[=1\catcode`]=2\catcode`\{=12\catcode`\}=12
4810 \gdef\doverb{#1[\def\next##1#1}[##1\endgroup]\next]
4813 \def\verb{\begingroup\setupverb\doverb}
4816 % Do the @verbatim magic: define the macro \doverbatim so that
4817 % the (first) argument ends when '@end verbatim' is reached, ie:
4819 % \def\doverbatim#1@end verbatim{#1}
4821 % For Texinfo it's a lot easier than for LaTeX,
4822 % because texinfo's \verbatim doesn't stop at '\end{verbatim}':
4823 % we need not redefine '\', '{' and '}'.
4825 % Inspired by LaTeX's verbatim command set [latex.ltx]
4826 %% Include LaTeX hack for completeness -- never know
4828 %% \catcode`|=0 \catcode`[=1
4829 %% \catcode`]=2\catcode`\{=12\catcode`\}=12\catcode`\ =\active
4830 %% \catcode`\\=12|gdef|doverbatim#1@end verbatim[
4831 %% #1|endgroup|def|Everbatim[]|end[verbatim]]
4837 % ignore everything up to the first ^^M, that's the newline at the end
4838 % of the @verbatim input line itself. Otherwise we get an extra blank
4839 % line in the output.
4840 \gdef\doverbatim#1^^M#2@end verbatim{#2\end verbatim}%
4844 \def\Everbatim{\nonfillfinish\endgroup}%
4847 \advance\leftskip by -\defbodyindent
4848 \begingroup\setupverbatim\doverbatim
4851 % @verbatiminclude FILE - insert text of file in verbatim environment.
4853 % Allow normal characters that we make active in the argument (a file name).
4854 \def\verbatiminclude{%
4864 \parsearg\doverbatiminclude
4866 \def\setupverbatiminclude{%
4869 \advance\leftskip by -\defbodyindent
4870 \begingroup\setupverbatim
4873 \def\doverbatiminclude#1{%
4874 % Restore active chars for included file.
4877 \let\value=\expandablevalue
4879 \expandafter\expandafter\setupverbatiminclude\input\thisfile
4885 % @copying ... @end copying.
4886 % Save the text away for @insertcopying later. Many commands won't be
4887 % allowed in this context, but that's ok.
4889 % We save the uninterpreted tokens, rather than creating a box.
4890 % Saving the text in a box would be much easier, but then all the
4891 % typesetting commands (@smallbook, font changes, etc.) have to be done
4892 % beforehand -- and a) we want @copying to be done first in the source
4893 % file; b) letting users define the frontmatter in as flexible order as
4894 % possible is very desirable.
4896 \def\copying{\begingroup
4897 % Define a command to swallow text until we reach `@end copying'.
4898 % \ is the escape char in this texinfo.tex file, so it is the
4899 % delimiter for the command; @ will be the escape char when we read
4900 % it, but that doesn't matter.
4901 \long\def\docopying##1\end copying{\gdef\copyingtext{##1}\enddocopying}%
4903 % We must preserve ^^M's in the input file; see \insertcopying below.
4904 \catcode`\^^M = \active
4908 % What we do to finish off the copying text.
4910 \def\enddocopying{\endgroup\ignorespaces}
4912 % @insertcopying. Here we must play games with ^^M's. On the one hand,
4913 % we need them to delimit commands such as `@end quotation', so they
4914 % must be active. On the other hand, we certainly don't want every
4915 % end-of-line to be a \par, as would happen with the normal active
4916 % definition of ^^M. On the third hand, two ^^M's in a row should still
4919 % Our approach is to make ^^M insert a space and a penalty1 normally;
4920 % then it can also check if \lastpenalty=1. If it does, then manually
4923 % This messes up the normal definitions of @c[omment], so we redefine
4924 % it. Similarly for @ignore. (These commands are used in the gcc
4925 % manual for man page generation.)
4927 % Seems pretty fragile, most line-oriented commands will presumably
4928 % fail, but for the limited use of getting the copying text (which
4929 % should be quite simple) inserted, we can hope it's ok.
4931 {\catcode`\^^M=\active %
4932 \gdef\insertcopying{\begingroup %
4933 \parindent = 0pt % looks wrong on title page
4935 \ifnum \lastpenalty=1 %
4942 % Fix @c[omment] for catcode 13 ^^M's.
4943 \def\c##1^^M{\ignorespaces}%
4946 % Don't bother jumping through all the hoops that \doignore does, it
4947 % would be very hard since the catcodes are already set.
4948 \long\def\ignore##1\end ignore{\ignorespaces}%
4957 \newskip\defbodyindent \defbodyindent=.4in
4958 \newskip\defargsindent \defargsindent=50pt
4959 \newskip\deflastargmargin \deflastargmargin=18pt
4961 % We want ()&[] to print specially on the defun line.
4964 \catcode`\(=\active \catcode`\)=\active
4965 \catcode`\[=\active \catcode`\]=\active
4969 % Make control sequences which act like normal parenthesis chars.
4970 \let\lparen = ( \let\rparen = )
4972 % Be sure that we always have a definition for `(', etc. For example,
4973 % if the fn name has parens in it, \boldbrax will not be in effect yet,
4974 % so TeX would otherwise complain about undefined control sequence.
4977 \global\let(=\lparen \global\let)=\rparen
4978 \global\let[=\lbrack \global\let]=\rbrack
4981 \gdef\functionparens{\boldbrax\let&=\amprm}
4982 \gdef\boldbrax{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb}
4985 \newcount\parencount
4987 % If we encounter &foo, then turn on ()-hacking afterwards
4989 \def\amprm#1 {\ampseentrue{\rm\} }
4993 % At the first level, print parens in roman,
4994 % otherwise use the default font.
4995 \ifnum \parencount=1 \rm \fi
4997 % The \sf parens (in \boldbrax) actually are a little bolder than
4998 % the contained text. This is especially needed for [ and ] .
5002 \def\infirstlevel#1{%
5009 \def\bfafterword#1 {#1 \bf}
5012 \global\advance\parencount by 1
5014 \infirstlevel \bfafterword
5019 \global\advance\parencount by -1
5022 \newcount\brackcount
5024 \global\advance\brackcount by 1
5029 \global\advance\brackcount by -1
5032 \def\checkparencounts{%
5033 \ifnum\parencount=0 \else \badparencount \fi
5034 \ifnum\brackcount=0 \else \badbrackcount \fi
5036 \def\badparencount{%
5037 \errmessage{Unbalanced parentheses in @def}%
5038 \global\parencount=0
5040 \def\badbrackcount{%
5041 \errmessage{Unbalanced square braces in @def}%
5042 \global\brackcount=0
5045 % \defname, which formats the name of the @def (not the args).
5046 % #1 is the function name.
5047 % #2 is the type of definition, such as "Function".
5050 % Get the values of \leftskip and \rightskip as they were outside the @def...
5051 \advance\leftskip by -\defbodyindent
5053 % How we'll format the type name. Putting it in brackets helps
5054 % distinguish it from the body text that may end up on the next line
5057 \setbox0=\hbox{\kern\deflastargmargin \ifx\temp\empty\else [\rm\temp]\fi}
5059 % Figure out line sizes for the paragraph shape.
5060 % The first line needs space for \box0; but if \rightskip is nonzero,
5061 % we need only space for the part of \box0 which exceeds it:
5062 \dimen0=\hsize \advance\dimen0 by -\wd0 \advance\dimen0 by \rightskip
5063 % The continuations:
5064 \dimen2=\hsize \advance\dimen2 by -\defargsindent
5065 % (plain.tex says that \dimen1 should be used only as global.)
5066 \parshape 2 0in \dimen0 \defargsindent \dimen2
5068 % Put the type name to the right margin.
5071 \hfil\box0 \kern-\hsize
5072 % \hsize has to be shortened this way:
5074 % Intentionally do not respect \rightskip, since we need the space.
5077 % Allow all lines to be underfull without complaint:
5078 \tolerance=10000 \hbadness=10000
5079 \exdentamount=\defbodyindent
5080 {\df #1}\enskip % output function name
5081 % \defunargs will be called next to output the arguments, if any.
5084 % Common pieces to start any @def...
5085 % #1 is the \E... control sequence to end the definition (which we define).
5086 % #2 is the \...x control sequence (which our caller defines).
5087 % #3 is the control sequence to process the header, such as \defunheader.
5089 \def\parsebodycommon#1#2#3{%
5091 \ifnum\lastpenalty<10000
5094 % If there are two @def commands in a row, we'll have a \nobreak,
5095 % which is there to keep the function description together with its
5096 % header. But if there's nothing but headers, we need to allow a
5097 % break somewhere. Check for penalty 10002 (inserted by
5098 % \defargscommonending) instead of 10000, since the sectioning
5099 % commands insert a \penalty10000, and we don't want to allow a break
5100 % between a section heading and a defun.
5101 \ifnum\lastpenalty=10002 \penalty2000 \fi
5103 % Similarly, after a section heading, do not allow a break.
5104 % But do insert the glue.
5105 \medskip % preceded by discardable penalty, so not a breakpoint
5108 % Define the \E... end token that this defining construct specifies
5109 % so that it will exit this group.
5110 \def#1{\endgraf\endgroup\medbreak}%
5113 \advance\leftskip by \defbodyindent
5114 \exdentamount=\defbodyindent
5117 % Common part of the \...x definitions.
5119 \def\defxbodycommon{%
5120 % As with \parsebodycommon above, allow line break if we have multiple
5121 % x headers in a row. It's not a great place, though.
5122 \ifnum\lastpenalty=10002 \penalty3000 \fi
5124 \begingroup\obeylines
5127 % Process body of @defun, @deffn, @defmac, etc.
5129 \def\defparsebody#1#2#3{%
5130 \parsebodycommon{#1}{#2}{#3}%
5131 \def#2{\defxbodycommon \activeparens \spacesplit#3}%
5132 \catcode\equalChar=\active
5133 \begingroup\obeylines\activeparens
5137 % #1, #2, #3 are the common arguments (see \parsebodycommon above).
5138 % #4, delimited by the space, is the class name.
5140 \def\defmethparsebody#1#2#3#4 {%
5141 \parsebodycommon{#1}{#2}{#3}%
5142 \def#2##1 {\defxbodycommon \activeparens \spacesplit{#3{##1}}}%
5143 \begingroup\obeylines\activeparens
5144 % The \empty here prevents misinterpretation of a construct such as
5145 % @deffn {whatever} {Enharmonic comma}
5146 % See comments at \deftpparsebody, although in our case we don't have
5147 % to remove the \empty afterwards, since it is empty.
5148 \spacesplit{#3{#4}}\empty
5151 % Used for @deftypemethod and @deftypeivar.
5152 % #1, #2, #3 are the common arguments (see \defparsebody).
5153 % #4, delimited by a space, is the class name.
5154 % #5 is the method's return type.
5156 \def\deftypemethparsebody#1#2#3#4 #5 {%
5157 \parsebodycommon{#1}{#2}{#3}%
5158 \def#2##1 ##2 {\defxbodycommon \activeparens \spacesplit{#3{##1}{##2}}}%
5159 \begingroup\obeylines\activeparens
5160 \spacesplit{#3{#4}{#5}}%
5163 % Used for @deftypeop. The change from \deftypemethparsebody is an
5164 % extra argument at the beginning which is the `category', instead of it
5165 % being the hardwired string `Method' or `Instance Variable'. We have
5166 % to account for this both in the \...x definition and in parsing the
5167 % input at hand. Thus also need a control sequence (passed as #5) for
5168 % the \E... definition to assign the category name to.
5170 \def\deftypeopparsebody#1#2#3#4#5 #6 {%
5171 \parsebodycommon{#1}{#2}{#3}%
5172 \def#2##1 ##2 ##3 {\def#4{##1}%
5173 \defxbodycommon \activeparens \spacesplit{#3{##2}{##3}}}%
5174 \begingroup\obeylines\activeparens
5175 \spacesplit{#3{#5}{#6}}%
5179 \def\defopparsebody #1#2#3#4#5 {%
5180 \parsebodycommon{#1}{#2}{#3}%
5181 \def#2##1 ##2 {\def#4{##1}%
5182 \defxbodycommon \activeparens \spacesplit{#3{##2}}}%
5183 \begingroup\obeylines\activeparens
5184 \spacesplit{#3{#5}}%
5187 % These parsing functions are similar to the preceding ones
5188 % except that they do not make parens into active characters.
5189 % These are used for "variables" since they have no arguments.
5191 \def\defvarparsebody #1#2#3{%
5192 \parsebodycommon{#1}{#2}{#3}%
5193 \def#2{\defxbodycommon \spacesplit#3}%
5194 \catcode\equalChar=\active
5195 \begingroup\obeylines
5200 \def\defopvarparsebody #1#2#3#4#5 {%
5201 \parsebodycommon{#1}{#2}{#3}%
5202 \def#2##1 ##2 {\def#4{##1}%
5203 \defxbodycommon \spacesplit{#3{##2}}}%
5204 \begingroup\obeylines
5205 \spacesplit{#3{#5}}%
5208 \def\defvrparsebody#1#2#3#4 {%
5209 \parsebodycommon{#1}{#2}{#3}%
5210 \def#2##1 {\defxbodycommon \spacesplit{#3{##1}}}%
5211 \begingroup\obeylines
5212 \spacesplit{#3{#4}}%
5215 % This loses on `@deftp {Data Type} {struct termios}' -- it thinks the
5216 % type is just `struct', because we lose the braces in `{struct
5217 % termios}' when \spacesplit reads its undelimited argument. Sigh.
5218 % \let\deftpparsebody=\defvrparsebody
5220 % So, to get around this, we put \empty in with the type name. That
5221 % way, TeX won't find exactly `{...}' as an undelimited argument, and
5222 % won't strip off the braces.
5224 \def\deftpparsebody #1#2#3#4 {%
5225 \parsebodycommon{#1}{#2}{#3}%
5226 \def#2##1 {\defxbodycommon \spacesplit{#3{##1}}}%
5227 \begingroup\obeylines
5228 \spacesplit{\parsetpheaderline{#3{#4}}}\empty
5231 % Fine, but then we have to eventually remove the \empty *and* the
5232 % braces (if any). That's what this does.
5234 \def\removeemptybraces\empty#1\relax{#1}
5236 % After \spacesplit has done its work, this is called -- #1 is the final
5237 % thing to call, #2 the type name (which starts with \empty), and #3
5238 % (which might be empty) the arguments.
5240 \def\parsetpheaderline#1#2#3{%
5241 #1{\removeemptybraces#2\relax}{#3}%
5244 % Split up #2 (the rest of the input line) at the first space token.
5245 % call #1 with two arguments:
5246 % the first is all of #2 before the space token,
5247 % the second is all of #2 after that space token.
5248 % If #2 contains no space token, all of it is passed as the first arg
5249 % and the second is passed as empty.
5252 \gdef\spacesplit#1#2^^M{\endgroup\spacesplitx{#1}#2 \relax\spacesplitx}%
5253 \long\gdef\spacesplitx#1#2 #3#4\spacesplitx{%
5263 % This is called to end the arguments processing for all the @def... commands.
5265 \def\defargscommonending{%
5266 \interlinepenalty = 10000
5267 \advance\rightskip by 0pt plus 1fil
5269 \nobreak\vskip -\parskip
5270 \penalty 10002 % signal to \parsebodycommon and \defxbodycommon.
5273 % This expands the args and terminates the paragraph they comprise.
5275 \def\defunargs#1{\functionparens \sl
5276 % Expand, preventing hyphenation at `-' chars.
5277 % Note that groups don't affect changes in \hyphenchar.
5278 % Set the font temporarily and use \font in case \setfont made \tensl a macro.
5279 {\tensl\hyphenchar\font=0}%
5281 {\tensl\hyphenchar\font=45}%
5283 \defargscommonending
5286 \def\deftypefunargs #1{%
5287 % Expand, preventing hyphenation at `-' chars.
5288 % Note that groups don't affect changes in \hyphenchar.
5289 % Use \boldbrax, not \functionparens, so that & is not special.
5291 \tclose{#1}% avoid \code because of side effects on active chars
5292 \defargscommonending
5295 % Do complete processing of one @defun or @defunx line already parsed.
5297 % @deffn Command forward-char nchars
5299 \def\deffn{\defmethparsebody\Edeffn\deffnx\deffnheader}
5301 \def\deffnheader #1#2#3{\doind {fn}{\code{#2}}%
5302 \begingroup\defname {#2}{#1}\defunargs{#3}\endgroup %
5303 \catcode\equalChar=\other % Turn off change made in \defparsebody
5306 % @defun == @deffn Function
5308 \def\defun{\defparsebody\Edefun\defunx\defunheader}
5310 \def\defunheader #1#2{\doind {fn}{\code{#1}}% Make entry in function index
5311 \begingroup\defname {#1}{\putwordDeffunc}%
5312 \defunargs {#2}\endgroup %
5313 \catcode\equalChar=\other % Turn off change made in \defparsebody
5316 % @deftypefun int foobar (int @var{foo}, float @var{bar})
5318 \def\deftypefun{\defparsebody\Edeftypefun\deftypefunx\deftypefunheader}
5320 % #1 is the data type. #2 is the name and args.
5321 \def\deftypefunheader #1#2{\deftypefunheaderx{#1}#2 \relax}
5322 % #1 is the data type, #2 the name, #3 the args.
5323 \def\deftypefunheaderx #1#2 #3\relax{%
5324 \doind {fn}{\code{#2}}% Make entry in function index
5325 \begingroup\defname {\defheaderxcond#1\relax$.$#2}{\putwordDeftypefun}%
5326 \deftypefunargs {#3}\endgroup %
5327 \catcode\equalChar=\other % Turn off change made in \defparsebody
5330 % @deftypefn {Library Function} int foobar (int @var{foo}, float @var{bar})
5332 \def\deftypefn{\defmethparsebody\Edeftypefn\deftypefnx\deftypefnheader}
5334 % \defheaderxcond#1\relax$.$
5335 % puts #1 in @code, followed by a space, but does nothing if #1 is null.
5336 \def\defheaderxcond#1#2$.${\ifx#1\relax\else\code{#1#2} \fi}
5338 % #1 is the classification. #2 is the data type. #3 is the name and args.
5339 \def\deftypefnheader #1#2#3{\deftypefnheaderx{#1}{#2}#3 \relax}
5340 % #1 is the classification, #2 the data type, #3 the name, #4 the args.
5341 \def\deftypefnheaderx #1#2#3 #4\relax{%
5342 \doind {fn}{\code{#3}}% Make entry in function index
5344 \defname {\defheaderxcond#2\relax$.$#3}{#1}%
5345 \deftypefunargs {#4}\endgroup %
5346 \catcode\equalChar=\other % Turn off change made in \defparsebody
5349 % @defmac == @deffn Macro
5351 \def\defmac{\defparsebody\Edefmac\defmacx\defmacheader}
5353 \def\defmacheader #1#2{\doind {fn}{\code{#1}}% Make entry in function index
5354 \begingroup\defname {#1}{\putwordDefmac}%
5355 \defunargs {#2}\endgroup %
5356 \catcode\equalChar=\other % Turn off change made in \defparsebody
5359 % @defspec == @deffn Special Form
5361 \def\defspec{\defparsebody\Edefspec\defspecx\defspecheader}
5363 \def\defspecheader #1#2{\doind {fn}{\code{#1}}% Make entry in function index
5364 \begingroup\defname {#1}{\putwordDefspec}%
5365 \defunargs {#2}\endgroup %
5366 \catcode\equalChar=\other % Turn off change made in \defparsebody
5369 % @defop CATEGORY CLASS OPERATION ARG...
5371 \def\defop #1 {\def\defoptype{#1}%
5372 \defopparsebody\Edefop\defopx\defopheader\defoptype}
5374 \def\defopheader#1#2#3{%
5375 \dosubind{fn}{\code{#2}}{\putwordon\ \code{#1}}% function index entry
5377 \defname{#2}{\defoptype\ \putwordon\ #1}%
5382 % @deftypeop CATEGORY CLASS TYPE OPERATION ARG...
5384 \def\deftypeop #1 {\def\deftypeopcategory{#1}%
5385 \deftypeopparsebody\Edeftypeop\deftypeopx\deftypeopheader
5388 % #1 is the class name, #2 the data type, #3 the operation name, #4 the args.
5389 \def\deftypeopheader#1#2#3#4{%
5390 \dosubind{fn}{\code{#3}}{\putwordon\ \code{#1}}% entry in function index
5392 \defname{\defheaderxcond#2\relax$.$#3}
5393 {\deftypeopcategory\ \putwordon\ \code{#1}}%
5394 \deftypefunargs{#4}%
5398 % @deftypemethod CLASS TYPE METHOD ARG...
5400 \def\deftypemethod{%
5401 \deftypemethparsebody\Edeftypemethod\deftypemethodx\deftypemethodheader}
5403 % #1 is the class name, #2 the data type, #3 the method name, #4 the args.
5404 \def\deftypemethodheader#1#2#3#4{%
5405 \dosubind{fn}{\code{#3}}{\putwordon\ \code{#1}}% entry in function index
5407 \defname{\defheaderxcond#2\relax$.$#3}{\putwordMethodon\ \code{#1}}%
5408 \deftypefunargs{#4}%
5412 % @deftypeivar CLASS TYPE VARNAME
5415 \deftypemethparsebody\Edeftypeivar\deftypeivarx\deftypeivarheader}
5417 % #1 is the class name, #2 the data type, #3 the variable name.
5418 \def\deftypeivarheader#1#2#3{%
5419 \dosubind{vr}{\code{#3}}{\putwordof\ \code{#1}}% entry in variable index
5421 \defname{\defheaderxcond#2\relax$.$#3}
5422 {\putwordInstanceVariableof\ \code{#1}}%
5427 % @defmethod == @defop Method
5429 \def\defmethod{\defmethparsebody\Edefmethod\defmethodx\defmethodheader}
5431 % #1 is the class name, #2 the method name, #3 the args.
5432 \def\defmethodheader#1#2#3{%
5433 \dosubind{fn}{\code{#2}}{\putwordon\ \code{#1}}% entry in function index
5435 \defname{#2}{\putwordMethodon\ \code{#1}}%
5440 % @defcv {Class Option} foo-class foo-flag
5442 \def\defcv #1 {\def\defcvtype{#1}%
5443 \defopvarparsebody\Edefcv\defcvx\defcvarheader\defcvtype}
5445 \def\defcvarheader #1#2#3{%
5446 \dosubind{vr}{\code{#2}}{\putwordof\ \code{#1}}% variable index entry
5448 \defname{#2}{\defcvtype\ \putwordof\ #1}%
5453 % @defivar CLASS VARNAME == @defcv {Instance Variable} CLASS VARNAME
5455 \def\defivar{\defvrparsebody\Edefivar\defivarx\defivarheader}
5457 \def\defivarheader#1#2#3{%
5458 \dosubind{vr}{\code{#2}}{\putwordof\ \code{#1}}% entry in var index
5460 \defname{#2}{\putwordInstanceVariableof\ #1}%
5466 % First, define the processing that is wanted for arguments of @defvar.
5467 % This is actually simple: just print them in roman.
5468 % This must expand the args and terminate the paragraph they make up
5469 \def\defvarargs #1{%
5472 \defargscommonending
5475 % @defvr Counter foo-count
5477 \def\defvr{\defvrparsebody\Edefvr\defvrx\defvrheader}
5479 \def\defvrheader #1#2#3{\doind {vr}{\code{#2}}%
5480 \begingroup\defname {#2}{#1}\defvarargs{#3}\endgroup}
5482 % @defvar == @defvr Variable
5484 \def\defvar{\defvarparsebody\Edefvar\defvarx\defvarheader}
5486 \def\defvarheader #1#2{\doind {vr}{\code{#1}}% Make entry in var index
5487 \begingroup\defname {#1}{\putwordDefvar}%
5488 \defvarargs {#2}\endgroup %
5491 % @defopt == @defvr {User Option}
5493 \def\defopt{\defvarparsebody\Edefopt\defoptx\defoptheader}
5495 \def\defoptheader #1#2{\doind {vr}{\code{#1}}% Make entry in var index
5496 \begingroup\defname {#1}{\putwordDefopt}%
5497 \defvarargs {#2}\endgroup %
5500 % @deftypevar int foobar
5502 \def\deftypevar{\defvarparsebody\Edeftypevar\deftypevarx\deftypevarheader}
5504 % #1 is the data type. #2 is the name, perhaps followed by text that
5505 % is actually part of the data type, which should not be put into the index.
5506 \def\deftypevarheader #1#2{%
5507 \dovarind#2 \relax% Make entry in variables index
5508 \begingroup\defname {\defheaderxcond#1\relax$.$#2}{\putwordDeftypevar}%
5509 \defargscommonending
5511 \def\dovarind#1 #2\relax{\doind{vr}{\code{#1}}}
5513 % @deftypevr {Global Flag} int enable
5515 \def\deftypevr{\defvrparsebody\Edeftypevr\deftypevrx\deftypevrheader}
5517 \def\deftypevrheader #1#2#3{\dovarind#3 \relax%
5518 \begingroup\defname {\defheaderxcond#2\relax$.$#3}{#1}
5519 \defargscommonending
5523 % Args are printed in bold, a slight difference from @defvar.
5525 \def\deftpargs #1{\bf \defvarargs{#1}}
5527 % @deftp Class window height width ...
5529 \def\deftp{\deftpparsebody\Edeftp\deftpx\deftpheader}
5531 \def\deftpheader #1#2#3{\doind {tp}{\code{#2}}%
5532 \begingroup\defname {#2}{#1}\deftpargs{#3}\endgroup}
5534 % These definitions are used if you use @defunx (etc.)
5535 % anywhere other than immediately after a @defun or @defunx.
5537 \def\defcvx#1 {\errmessage{@defcvx in invalid context}}
5538 \def\deffnx#1 {\errmessage{@deffnx in invalid context}}
5539 \def\defivarx#1 {\errmessage{@defivarx in invalid context}}
5540 \def\defmacx#1 {\errmessage{@defmacx in invalid context}}
5541 \def\defmethodx#1 {\errmessage{@defmethodx in invalid context}}
5542 \def\defoptx #1 {\errmessage{@defoptx in invalid context}}
5543 \def\defopx#1 {\errmessage{@defopx in invalid context}}
5544 \def\defspecx#1 {\errmessage{@defspecx in invalid context}}
5545 \def\deftpx#1 {\errmessage{@deftpx in invalid context}}
5546 \def\deftypefnx#1 {\errmessage{@deftypefnx in invalid context}}
5547 \def\deftypefunx#1 {\errmessage{@deftypefunx in invalid context}}
5548 \def\deftypeivarx#1 {\errmessage{@deftypeivarx in invalid context}}
5549 \def\deftypemethodx#1 {\errmessage{@deftypemethodx in invalid context}}
5550 \def\deftypeopx#1 {\errmessage{@deftypeopx in invalid context}}
5551 \def\deftypevarx#1 {\errmessage{@deftypevarx in invalid context}}
5552 \def\deftypevrx#1 {\errmessage{@deftypevrx in invalid context}}
5553 \def\defunx#1 {\errmessage{@defunx in invalid context}}
5554 \def\defvarx#1 {\errmessage{@defvarx in invalid context}}
5555 \def\defvrx#1 {\errmessage{@defvrx in invalid context}}
5561 % To do this right we need a feature of e-TeX, \scantokens,
5562 % which we arrange to emulate with a temporary file in ordinary TeX.
5563 \ifx\eTeXversion\undefined
5564 \newwrite\macscribble
5566 \begingroup \newlinechar`\^^M
5567 % Undo catcode changes of \startcontents and \doprintindex
5568 \catcode`\@=0 \catcode`\\=\other \escapechar=`\@
5569 % Append \endinput to make sure that TeX does not see the ending newline.
5570 \toks0={#1\endinput}%
5571 \immediate\openout\macscribble=\jobname.tmp
5572 \immediate\write\macscribble{\the\toks0}%
5573 \immediate\closeout\macscribble
5574 \let\xeatspaces\eatspaces
5580 \begingroup \newlinechar`\^^M
5581 % Undo catcode changes of \startcontents and \doprintindex
5582 \catcode`\@=0 \catcode`\\=\other \escapechar=`\@
5583 \let\xeatspaces\eatspaces\scantokens{#1\endinput}\endgroup}
5586 \newcount\paramno % Count of parameters
5587 \newtoks\macname % Macro name
5588 \newif\ifrecursive % Is it recursive?
5589 \def\macrolist{} % List of all defined macros in the form
5590 % \do\macro1\do\macro2...
5593 % Thisdoes \let #1 = #2, except with \csnames.
5595 \expandafter\expandafter
5597 \expandafter\expandafter
5599 \csname#2\endcsname}
5601 % Trim leading and trailing spaces off a string.
5602 % Concepts from aro-bend problem 15 (see CTAN).
5604 \gdef\eatspaces #1{\expandafter\trim@\expandafter{#1 }}
5605 \gdef\trim@ #1{\trim@@ @#1 @ #1 @ @@}
5606 \gdef\trim@@ #1@ #2@ #3@@{\trim@@@\empty #2 @}
5608 \unbrace{\gdef\trim@@@ #1 } #2@{#1}
5611 % Trim a single trailing ^^M off a string.
5612 {\catcode`\^^M=\other \catcode`\Q=3%
5613 \gdef\eatcr #1{\eatcra #1Q^^MQ}%
5614 \gdef\eatcra#1^^MQ{\eatcrb#1Q}%
5615 \gdef\eatcrb#1Q#2Q{#1}%
5618 % Macro bodies are absorbed as an argument in a context where
5619 % all characters are catcode 10, 11 or 12, except \ which is active
5620 % (as in normal texinfo). It is necessary to change the definition of \.
5622 % It's necessary to have hard CRs when the macro is executed. This is
5623 % done by making ^^M (\endlinechar) catcode 12 when reading the macro
5624 % body, and then making it the \newlinechar in \scanmacro.
5626 \def\macrobodyctxt{%
5637 \catcode`\^^M=\other
5651 % \mbodybackslash is the definition of \ in @macro bodies.
5652 % It maps \foo\ => \csname macarg.foo\endcsname => #N
5653 % where N is the macro parameter number.
5654 % We define \csname macarg.\endcsname to be \realbackslash, so
5655 % \\ in macro replacement text gets you a backslash.
5657 {\catcode`@=0 @catcode`@\=@active
5658 @gdef@usembodybackslash{@let\=@mbodybackslash}
5659 @gdef@mbodybackslash#1\{@csname macarg.#1@endcsname}
5661 \expandafter\def\csname macarg.\endcsname{\realbackslash}
5663 \def\macro{\recursivefalse\parsearg\macroxxx}
5664 \def\rmacro{\recursivetrue\parsearg\macroxxx}
5667 \getargs{#1}% now \macname is the macname and \argl the arglist
5668 \ifx\argl\empty % no arguments
5671 \expandafter\parsemargdef \argl;%
5673 \if1\csname ismacro.\the\macname\endcsname
5674 \message{Warning: redefining \the\macname}%
5676 \expandafter\ifx\csname \the\macname\endcsname \relax
5677 \else \errmessage{Macro name \the\macname\space already defined}\fi
5678 \global\cslet{macsave.\the\macname}{\the\macname}%
5679 \global\expandafter\let\csname ismacro.\the\macname\endcsname=1%
5680 % Add the macroname to \macrolist
5681 \toks0 = \expandafter{\macrolist\do}%
5682 \xdef\macrolist{\the\toks0
5683 \expandafter\noexpand\csname\the\macname\endcsname}%
5685 \begingroup \macrobodyctxt
5686 \ifrecursive \expandafter\parsermacbody
5687 \else \expandafter\parsemacbody
5690 \def\unmacro{\parsearg\dounmacro}
5692 \if1\csname ismacro.#1\endcsname
5693 \global\cslet{#1}{macsave.#1}%
5694 \global\expandafter\let \csname ismacro.#1\endcsname=0%
5695 % Remove the macro name from \macrolist:
5697 \expandafter\let\csname#1\endcsname \relax
5699 \xdef\macrolist{\macrolist}%
5702 \errmessage{Macro #1 not defined}%
5706 % Called by \do from \dounmacro on each macro. The idea is to omit any
5707 % macro definitions that have been changed to \relax.
5713 \noexpand\do \noexpand #1%
5717 % This makes use of the obscure feature that if the last token of a
5718 % <parameter list> is #, then the preceding argument is delimited by
5719 % an opening brace, and that opening brace is not consumed.
5720 \def\getargs#1{\getargsxxx#1{}}
5721 \def\getargsxxx#1#{\getmacname #1 \relax\getmacargs}
5722 \def\getmacname #1 #2\relax{\macname={#1}}
5723 \def\getmacargs#1{\def\argl{#1}}
5725 % Parse the optional {params} list. Set up \paramno and \paramlist
5726 % so \defmacro knows what to do. Define \macarg.blah for each blah
5727 % in the params list, to be ##N where N is the position in that list.
5728 % That gets used by \mbodybackslash (above).
5730 % We need to get `macro parameter char #' into several definitions.
5731 % The technique used is stolen from LaTeX: let \hash be something
5732 % unexpandable, insert that wherever you need a #, and then redefine
5733 % it to # just before using the token list produced.
5735 % The same technique is used to protect \eatspaces till just before
5736 % the macro is used.
5738 \def\parsemargdef#1;{\paramno=0\def\paramlist{}%
5739 \let\hash\relax\let\xeatspaces\relax\parsemargdefxxx#1,;,}
5740 \def\parsemargdefxxx#1,{%
5741 \if#1;\let\next=\relax
5742 \else \let\next=\parsemargdefxxx
5743 \advance\paramno by 1%
5744 \expandafter\edef\csname macarg.\eatspaces{#1}\endcsname
5745 {\xeatspaces{\hash\the\paramno}}%
5746 \edef\paramlist{\paramlist\hash\the\paramno,}%
5749 % These two commands read recursive and nonrecursive macro bodies.
5750 % (They're different since rec and nonrec macros end differently.)
5752 \long\def\parsemacbody#1@end macro%
5753 {\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
5754 \long\def\parsermacbody#1@end rmacro%
5755 {\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
5757 % This defines the macro itself. There are six cases: recursive and
5758 % nonrecursive macros of zero, one, and many arguments.
5759 % Much magic with \expandafter here.
5760 % \xdef is used so that macro definitions will survive the file
5761 % they're defined in; @include reads the file inside a group.
5763 \let\hash=##% convert placeholders to macro parameter chars
5767 \expandafter\xdef\csname\the\macname\endcsname{%
5768 \noexpand\scanmacro{\temp}}%
5770 \expandafter\xdef\csname\the\macname\endcsname{%
5771 \bgroup\noexpand\macroargctxt
5772 \noexpand\braceorline
5773 \expandafter\noexpand\csname\the\macname xxx\endcsname}%
5774 \expandafter\xdef\csname\the\macname xxx\endcsname##1{%
5775 \egroup\noexpand\scanmacro{\temp}}%
5777 \expandafter\xdef\csname\the\macname\endcsname{%
5778 \bgroup\noexpand\macroargctxt
5779 \noexpand\csname\the\macname xx\endcsname}%
5780 \expandafter\xdef\csname\the\macname xx\endcsname##1{%
5781 \expandafter\noexpand\csname\the\macname xxx\endcsname ##1,}%
5782 \expandafter\expandafter
5784 \expandafter\expandafter
5785 \csname\the\macname xxx\endcsname
5786 \paramlist{\egroup\noexpand\scanmacro{\temp}}%
5791 \expandafter\xdef\csname\the\macname\endcsname{%
5792 \noexpand\norecurse{\the\macname}%
5793 \noexpand\scanmacro{\temp}\egroup}%
5795 \expandafter\xdef\csname\the\macname\endcsname{%
5796 \bgroup\noexpand\macroargctxt
5797 \noexpand\braceorline
5798 \expandafter\noexpand\csname\the\macname xxx\endcsname}%
5799 \expandafter\xdef\csname\the\macname xxx\endcsname##1{%
5801 \noexpand\norecurse{\the\macname}%
5802 \noexpand\scanmacro{\temp}\egroup}%
5804 \expandafter\xdef\csname\the\macname\endcsname{%
5805 \bgroup\noexpand\macroargctxt
5806 \expandafter\noexpand\csname\the\macname xx\endcsname}%
5807 \expandafter\xdef\csname\the\macname xx\endcsname##1{%
5808 \expandafter\noexpand\csname\the\macname xxx\endcsname ##1,}%
5809 \expandafter\expandafter
5811 \expandafter\expandafter
5812 \csname\the\macname xxx\endcsname
5815 \noexpand\norecurse{\the\macname}%
5816 \noexpand\scanmacro{\temp}\egroup}%
5820 \def\norecurse#1{\bgroup\cslet{#1}{macsave.#1}}
5822 % \braceorline decides whether the next nonwhitespace character is a
5823 % {. If so it reads up to the closing }, if not, it reads the whole
5824 % line. Whatever was read is then fed to the next control sequence
5825 % as an argument (by \parsebrace or \parsearg)
5826 \def\braceorline#1{\let\next=#1\futurelet\nchar\braceorlinexxx}
5827 \def\braceorlinexxx{%
5828 \ifx\nchar\bgroup\else
5829 \expandafter\parsearg
5832 % We mant to disable all macros during \shipout so that they are not
5833 % expanded by \write.
5834 \def\turnoffmacros{\begingroup \def\do##1{\let\noexpand##1=\relax}%
5835 \edef\next{\macrolist}\expandafter\endgroup\next}
5839 % We need some trickery to remove the optional spaces around the equal
5840 % sign. Just make them active and then expand them all to nothing.
5841 \def\alias{\parseargusing\obeyspaces\aliasxxx}
5842 \def\aliasxxx #1{\aliasyyy#1\relax}
5843 \def\aliasyyy #1=#2\relax{%
5845 \expandafter\let\obeyedspace=\empty
5846 \xdef\next{\global\let\makecsname{#1}=\makecsname{#2}}%
5850 \def\makecsname#1{\expandafter\noexpand\csname#1\endcsname}
5853 \message{cross references,}
5857 \newif\ifhavexrefs % True if xref values are known.
5858 \newif\ifwarnedxrefs % True if we warned once that they aren't known.
5860 % @inforef is relatively simple.
5861 \def\inforef #1{\inforefzzz #1,,,,**}
5862 \def\inforefzzz #1,#2,#3,#4**{\putwordSee{} \putwordInfo{} \putwordfile{} \file{\ignorespaces #3{}},
5863 node \samp{\ignorespaces#1{}}}
5865 % @node's only job in TeX is to define \lastnode, which is used in
5867 \def\node{\ENVcheck\parsearg\nodezzz}
5868 \def\nodezzz#1{\nodexxx #1,\finishnodeparse}
5869 \def\nodexxx#1,#2\finishnodeparse{\gdef\lastnode{#1}}
5871 \let\lastnode=\empty
5873 % Write a cross-reference definition for the current node. #1 is the
5874 % type (Ynumbered, Yappendix, Ynothing).
5877 \ifx\lastnode\empty\else
5878 \setref{\lastnode}{#1}%
5879 \global\let\lastnode=\empty
5883 % @anchor{NAME} -- define xref target at arbitrary point.
5885 \newcount\savesfregister
5887 \gdef\savesf{\relax \ifhmode \savesfregister=\spacefactor \fi}
5888 \gdef\restoresf{\relax \ifhmode \spacefactor=\savesfregister \fi}
5889 \gdef\anchor#1{\savesf \setref{#1}{Ynothing}\restoresf \ignorespaces}
5891 % \setref{NAME}{SNT} defines a cross-reference point NAME (a node or an
5892 % anchor), namely NAME-title (the corresponding @chapter/etc. name),
5893 % NAME-pg (the page number), and NAME-snt (section number and type).
5894 % Called from \donoderef and \anchor.
5896 % We take care not to fully expand the title, since it may contain
5899 % Use \turnoffactive so that punctuation chars such as underscore
5900 % and backslash work in node names.
5907 \edef\writexrdef##1##2{%
5908 \write\auxfile{@xrdef{#1-% #1 of \setref, expanded by the \edef
5909 ##1}{##2}}% these are parameters of \writexrdef
5911 \toks0 = \expandafter{\thissection}%
5912 \immediate \writexrdef{title}{\the\toks0 }%
5913 \immediate \writexrdef{snt}{\csname #2\endcsname}% \Ynumbered etc.
5914 \writexrdef{pg}{\folio}% will be written later, during \shipout
5919 % @xref, @pxref, and @ref generate cross-references. For \xrefX, #1 is
5920 % the node name, #2 the name of the Info cross-reference, #3 the printed
5921 % node name, #4 the name of the Info file, #5 the name of the printed
5922 % manual. All but the node name can be omitted.
5924 \def\pxref#1{\putwordsee{} \xrefX[#1,,,,,,,]}
5925 \def\xref#1{\putwordSee{} \xrefX[#1,,,,,,,]}
5926 \def\ref#1{\xrefX[#1,,,,,,,]}
5927 \def\xrefX[#1,#2,#3,#4,#5,#6]{\begingroup
5929 \def\printedmanual{\ignorespaces #5}%
5930 \def\printednodename{\ignorespaces #3}%
5931 \setbox1=\hbox{\printedmanual}%
5932 \setbox0=\hbox{\printednodename}%
5934 % No printed node name was explicitly given.
5935 \expandafter\ifx\csname SETxref-automatic-section-title\endcsname\relax
5936 % Use the node name inside the square brackets.
5937 \def\printednodename{\ignorespaces #1}%
5939 % Use the actual chapter/section title appear inside
5940 % the square brackets. Use the real section title if we have it.
5942 % It is in another manual, so we don't have it.
5943 \def\printednodename{\ignorespaces #1}%
5946 % We know the real title if we have the xref values.
5947 \def\printednodename{\refx{#1-title}{}}%
5949 % Otherwise just copy the Info node name.
5950 \def\printednodename{\ignorespaces #1}%
5956 % If we use \unhbox0 and \unhbox1 to print the node names, TeX does not
5957 % insert empty discretionaries after hyphens, which means that it will
5958 % not find a line break at a hyphen in a node names. Since some manuals
5959 % are best written with fairly long node names, containing hyphens, this
5960 % is a loss. Therefore, we give the text of the node name again, so it
5961 % is as if TeX is seeing it for the first time.
5965 {\turnoffactive \otherbackslash
5966 \ifnum\filenamelength>0
5967 \startlink attr{/Border [0 0 0]}%
5968 goto file{\the\filename.pdf} name{#1}%
5970 \startlink attr{/Border [0 0 0]}%
5971 goto name{\pdfmkpgn{#1}}%
5978 \putwordsection{} ``\printednodename'' \putwordin{} \cite{\printedmanual}%
5980 % _ (for example) has to be the character _ for the purposes of the
5981 % control sequence corresponding to the node, but it has to expand
5982 % into the usual \leavevmode...\vrule stuff for purposes of
5983 % printing. So we \turnoffactive for the \refx-snt, back on for the
5984 % printing, back off for the \refx-pg.
5985 {\turnoffactive \otherbackslash
5986 % Only output a following space if the -snt ref is nonempty; for
5987 % @unnumbered and @anchor, it won't be.
5988 \setbox2 = \hbox{\ignorespaces \refx{#1-snt}{}}%
5989 \ifdim \wd2 > 0pt \refx{#1-snt}\space\fi
5991 % output the `[mynode]' via a macro.
5992 \xrefprintnodename\printednodename
5994 % But we always want a comma and a space:
5997 % output the `page 3'.
5998 \turnoffactive \otherbackslash \putwordpage\tie\refx{#1-pg}{}%
6003 % This macro is called from \xrefX for the `[nodename]' part of xref
6004 % output. It's a separate macro only so it can be changed more easily,
6005 % since not square brackets don't work in some documents. Particularly
6006 % one that Bob is working on :).
6008 \def\xrefprintnodename#1{[#1]}
6010 % Things referred to by \setref.
6016 \putwordChapter@tie \the\chapno
6017 \else \ifnum\subsecno=0
6018 \putwordSection@tie \the\chapno.\the\secno
6019 \else \ifnum\subsubsecno=0
6020 \putwordSection@tie \the\chapno.\the\secno.\the\subsecno
6022 \putwordSection@tie \the\chapno.\the\secno.\the\subsecno.\the\subsubsecno
6027 \putwordAppendix@tie @char\the\appendixno{}%
6028 \else \ifnum\subsecno=0
6029 \putwordSection@tie @char\the\appendixno.\the\secno
6030 \else \ifnum\subsubsecno=0
6031 \putwordSection@tie @char\the\appendixno.\the\secno.\the\subsecno
6034 @char\the\appendixno.\the\secno.\the\subsecno.\the\subsubsecno
6038 % Use TeX 3.0's \inputlineno to get the line number, for better error
6039 % messages, but if we're using an old version of TeX, don't do anything.
6041 \ifx\inputlineno\thisisundefined
6042 \let\linenumber = \empty % Pre-3.0.
6044 \def\linenumber{\the\inputlineno:\space}
6047 % Define \refx{NAME}{SUFFIX} to reference a cross-reference string named NAME.
6048 % If its value is nonempty, SUFFIX is output afterward.
6054 \expandafter\global\expandafter\let\expandafter\thisrefX
6055 \csname X#1\endcsname
6058 % If not defined, say something at least.
6059 \angleleft un\-de\-fined\angleright
6062 \message{\linenumber Undefined cross reference `#1'.}%
6065 \global\warnedxrefstrue
6066 \message{Cross reference values unknown; you must run TeX again.}%
6071 % It's defined, so just use it.
6074 #2% Output the suffix in any case.
6077 % This is the macro invoked by entries in the aux file.
6079 \def\xrdef#1{\expandafter\gdef\csname X#1\endcsname}
6081 % Read the last existing aux file, if any. No error if none exists.
6084 \def\readauxfile{\begingroup
6085 \catcode`\^^@=\other
6086 \catcode`\^^A=\other
6087 \catcode`\^^B=\other
6088 \catcode`\^^C=\other
6089 \catcode`\^^D=\other
6090 \catcode`\^^E=\other
6091 \catcode`\^^F=\other
6092 \catcode`\^^G=\other
6093 \catcode`\^^H=\other
6094 \catcode`\^^K=\other
6095 \catcode`\^^L=\other
6096 \catcode`\^^N=\other
6097 \catcode`\^^P=\other
6098 \catcode`\^^Q=\other
6099 \catcode`\^^R=\other
6100 \catcode`\^^S=\other
6101 \catcode`\^^T=\other
6102 \catcode`\^^U=\other
6103 \catcode`\^^V=\other
6104 \catcode`\^^W=\other
6105 \catcode`\^^X=\other
6106 \catcode`\^^Z=\other
6107 \catcode`\^^[=\other
6108 \catcode`\^^\=\other
6109 \catcode`\^^]=\other
6110 \catcode`\^^^=\other
6111 \catcode`\^^_=\other
6112 % It was suggested to set the catcode of ^ to 7, which would allow ^^e4 etc.
6113 % in xref tags, i.e., node names. But since ^^e4 notation isn't
6114 % supported in the main text, it doesn't seem desirable. Furthermore,
6115 % that is not enough: for node names that actually contain a ^
6116 % character, we would end up writing a line like this: 'xrdef {'hat
6117 % b-title}{'hat b} and \xrdef does a \csname...\endcsname on the first
6118 % argument, and \hat is not an expandable control sequence. It could
6119 % all be worked out, but why? Either we support ^^ or we don't.
6121 % The other change necessary for this was to define \auxhat:
6122 % \def\auxhat{\def^{'hat }}% extra space so ok if followed by letter
6123 % and then to call \auxhat in \setq.
6127 % Special characters. Should be turned off anyway, but...
6140 \catcode`+=\other % avoid \+ for paranoia even though we've turned it off
6142 % Make the characters 128-255 be printing characters
6146 \catcode\count 1=\other
6147 \advance\count 1 by 1
6148 \ifnum \count 1<256 \loop \fi
6152 % Turn off \ as an escape so we do not lose on
6153 % entries which were dumped with control sequences in their names.
6154 % For example, @xrdef{$\leq $-fun}{page ...} made by @defun ^^
6155 % Reference to such entries still does not work the way one would wish,
6156 % but at least they do not bomb out when the aux file is read in.
6159 % @ is our escape character in .aux files.
6164 \openin 1 \jobname.aux
6168 \global\havexrefstrue
6170 % Open the new aux file right away (otherwise the \immediate's in
6171 % \setref cause spurious terminal output). TeX will close it
6172 % automatically at exit.
6173 \immediate\openout\auxfile=\jobname.aux
6179 \newcount \footnoteno
6181 % The trailing space in the following definition for supereject is
6182 % vital for proper filling; pages come out unaligned when you do a
6183 % pagealignmacro call if that space before the closing brace is
6184 % removed. (Generally, numeric constants should always be followed by a
6185 % space to prevent strange expansion errors.)
6186 \def\supereject{\par\penalty -20000\footnoteno =0 }
6188 % @footnotestyle is meaningful for info output only.
6189 \let\footnotestyle=\comment
6191 \let\ptexfootnote=\footnote
6195 % Auto-number footnotes. Otherwise like plain.
6197 \let\indent=\ptexindent
6198 \let\noindent=\ptexnoindent
6199 \global\advance\footnoteno by \@ne
6200 \edef\thisfootno{$^{\the\footnoteno}$}%
6202 % In case the footnote comes at the end of a sentence, preserve the
6203 % extra spacing after we do the footnote number.
6205 \ifhmode\edef\@sf{\spacefactor\the\spacefactor}\ptexslash\fi
6207 % Remove inadvertent blank space before typesetting the footnote number.
6213 % Don't bother with the trickery in plain.tex to not require the
6214 % footnote text as a parameter. Our footnotes don't need to be so general.
6216 % Oh yes, they do; otherwise, @ifset and anything else that uses
6217 % \parseargline fail inside footnotes because the tokens are fixed when
6218 % the footnote is read. --karl, 16nov96.
6220 % The start of the footnote looks usually like this:
6221 \gdef\startfootins{\insert\footins\bgroup}
6223 % ... but this macro is redefined inside @multitable.
6227 % We want to typeset this text as a normal paragraph, even if the
6228 % footnote reference occurs in (for example) a display environment.
6229 % So reset some parameters.
6231 \interlinepenalty\interfootnotelinepenalty
6232 \splittopskip\ht\strutbox % top baseline for broken footnotes
6233 \splitmaxdepth\dp\strutbox
6234 \floatingpenalty\@MM
6239 \parindent\defaultparindent
6243 % Because we use hanging indentation in footnotes, a @noindent appears
6244 % to exdent this text, so make it be a no-op. makeinfo does not use
6245 % hanging indentation so @noindent can still be needed within footnote
6246 % text after an @example or the like (not that this is good style).
6247 \let\noindent = \relax
6249 % Hang the footnote text off the number. Use \everypar in case the
6250 % footnote extends for more than one paragraph.
6251 \everypar = {\hang}%
6252 \textindent{\thisfootno}%
6254 % Don't crash into the line above the footnote text. Since this
6255 % expands into a box, it must come within the paragraph, lest it
6256 % provide a place where TeX can split the footnote.
6258 \futurelet\next\fo@t
6260 }%end \catcode `\@=11
6262 % @| inserts a changebar to the left of the current line. It should
6263 % surround any changed text. This approach does *not* work if the
6264 % change spans more than two lines of output. To handle that, we would
6265 % have adopt a much more difficult approach (putting marks into the main
6266 % vertical list for the beginning and end of each change).
6269 % \vadjust can only be used in horizontal mode.
6272 % Append this vertical mode material after the current line in the output.
6274 % We want to insert a rule with the height and depth of the current
6275 % leading; that is exactly what \strutbox is supposed to record.
6276 \vskip-\baselineskip
6278 % \vadjust-items are inserted at the left edge of the type. So
6279 % the \llap here moves out into the left-hand margin.
6282 % For a thicker or thinner bar, change the `1pt'.
6283 \vrule height\baselineskip width1pt
6285 % This is the space between the bar and the text.
6291 % For a final copy, take out the rectangles
6292 % that mark overfull boxes (in case you have decided
6293 % that the text looks ok even though it passes the margin).
6295 \def\finalout{\overfullrule=0pt}
6297 % @image. We use the macros from epsf.tex to support this.
6298 % If epsf.tex is not installed and @image is used, we complain.
6300 % Check for and read epsf.tex up front. If we read it only at @image
6301 % time, we might be inside a group, and then its definitions would get
6302 % undone and the next image would fail.
6303 \openin 1 = epsf.tex
6306 % Do not bother showing banner with epsf.tex v2.7k (available in
6307 % doc/epsf.tex and on ctan).
6308 \def\epsfannounce{\toks0 = }%
6312 % We will only complain once about lack of epsf.tex.
6313 \newif\ifwarnednoepsf
6314 \newhelp\noepsfhelp{epsf.tex must be installed for images to
6315 work. It is also included in the Texinfo distribution, or you can get
6316 it from ftp://tug.org/tex/epsf.tex.}
6319 \ifx\epsfbox\undefined
6320 \ifwarnednoepsf \else
6321 \errhelp = \noepsfhelp
6322 \errmessage{epsf.tex not found, images will be ignored}%
6323 \global\warnednoepsftrue
6326 \imagexxx #1,,,,,\finish
6330 % Arguments to @image:
6331 % #1 is (mandatory) image filename; we tack on .eps extension.
6332 % #2 is (optional) width, #3 is (optional) height.
6333 % #4 is (ignored optional) html alt text.
6334 % #5 is (ignored optional) extension.
6335 % #6 is just the usual extra ignored arg for parsing this stuff.
6337 \def\imagexxx#1,#2,#3,#4,#5,#6\finish{\begingroup
6338 \catcode`\^^M = 5 % in case we're inside an example
6339 \normalturnoffactive % allow _ et al. in names
6340 % If the image is by itself, center it.
6344 % Usually we'll have text after the image which will insert
6345 % \parskip glue, so insert it here too to equalize the space
6347 \nobreak\vskip\parskip
6354 \dopdfimage{#1}{#2}{#3}%
6356 % \epsfbox itself resets \epsf?size at each figure.
6357 \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \epsfxsize=#2\relax \fi
6358 \setbox0 = \hbox{\ignorespaces #3}\ifdim\wd0 > 0pt \epsfysize=#3\relax \fi
6362 \ifimagevmode \hss \egroup \bigbreak \fi % space after the image
6366 \message{localization,}
6369 % @documentlanguage is usually given very early, just after
6370 % @setfilename. If done too late, it may not override everything
6371 % properly. Single argument is the language abbreviation.
6372 % It would be nice if we could set up a hyphenation file here.
6374 \def\documentlanguage{\parsearg\dodocumentlanguage}
6375 \def\dodocumentlanguage#1{%
6376 \tex % read txi-??.tex file in plain TeX.
6377 % Read the file if it exists.
6378 \openin 1 txi-#1.tex
6380 \errhelp = \nolanghelp
6381 \errmessage{Cannot read language file txi-#1.tex}%
6384 \def\temp{\input txi-#1.tex }%
6389 \newhelp\nolanghelp{The given language definition file cannot be found or
6390 is empty. Maybe you need to install it? In the current directory
6391 should work if nowhere else does.}
6394 % @documentencoding should change something in TeX eventually, most
6395 % likely, but for now just recognize it.
6396 \let\documentencoding = \comment
6399 % Page size parameters.
6401 \newdimen\defaultparindent \defaultparindent = 15pt
6403 \chapheadingskip = 15pt plus 4pt minus 2pt
6404 \secheadingskip = 12pt plus 3pt minus 2pt
6405 \subsecheadingskip = 9pt plus 2pt minus 2pt
6407 % Prevent underfull vbox error messages.
6410 % Don't be so finicky about underfull hboxes, either.
6413 % Following George Bush, just get rid of widows and orphans.
6417 % Use TeX 3.0's \emergencystretch to help line breaking, but if we're
6418 % using an old version of TeX, don't do anything. We want the amount of
6419 % stretch added to depend on the line length, hence the dependence on
6420 % \hsize. We call this whenever the paper size is set.
6422 \def\setemergencystretch{%
6423 \ifx\emergencystretch\thisisundefined
6424 % Allow us to assign to \emergencystretch anyway.
6425 \def\emergencystretch{\dimen0}%
6427 \emergencystretch = .15\hsize
6431 % Parameters in order: 1) textheight; 2) textwidth; 3) voffset;
6432 % 4) hoffset; 5) binding offset; 6) topskip; 7) physical page height; 8)
6433 % physical page width.
6435 % We also call \setleading{\textleading}, so the caller should define
6436 % \textleading. The caller should also set \parskip.
6438 \def\internalpagesizes#1#2#3#4#5#6#7#8{%
6441 \splittopskip = \topskip
6444 \advance\vsize by \topskip
6445 \outervsize = \vsize
6446 \advance\outervsize by 2\topandbottommargin
6447 \pageheight = \vsize
6450 \outerhsize = \hsize
6451 \advance\outerhsize by 0.5in
6454 \normaloffset = #4\relax
6455 \bindingoffset = #5\relax
6458 \pdfpageheight #7\relax
6459 \pdfpagewidth #8\relax
6462 \setleading{\textleading}
6464 \parindent = \defaultparindent
6465 \setemergencystretch
6468 % @letterpaper (the default).
6469 \def\letterpaper{{\globaldefs = 1
6470 \parskip = 3pt plus 2pt minus 1pt
6471 \textleading = 13.2pt
6473 % If page is nothing but text, make it come out even.
6474 \internalpagesizes{46\baselineskip}{6in}%
6476 {\bindingoffset}{36pt}%
6480 % Use @smallbook to reset parameters for 7x9.5 (or so) format.
6481 \def\smallbook{{\globaldefs = 1
6482 \parskip = 2pt plus 1pt
6485 \internalpagesizes{7.5in}{5in}%
6487 {\bindingoffset}{16pt}%
6490 \lispnarrowing = 0.3in
6493 \contentsrightmargin = 0pt
6494 \defbodyindent = .5cm
6497 % Use @afourpaper to print on European A4 paper.
6498 \def\afourpaper{{\globaldefs = 1
6499 \parskip = 3pt plus 2pt minus 1pt
6500 \textleading = 13.2pt
6502 % Double-side printing via postscript on Laserjet 4050
6503 % prints double-sided nicely when \bindingoffset=10mm and \hoffset=-6mm.
6504 % To change the settings for a different printer or situation, adjust
6505 % \normaloffset until the front-side and back-side texts align. Then
6506 % do the same for \bindingoffset. You can set these for testing in
6507 % your texinfo source file like this:
6509 % \global\normaloffset = -6mm
6510 % \global\bindingoffset = 10mm
6512 \internalpagesizes{51\baselineskip}{160mm}
6513 {\voffset}{\hoffset}%
6514 {\bindingoffset}{44pt}%
6519 \contentsrightmargin = 0pt
6520 \defbodyindent = 5mm
6523 % Use @afivepaper to print on European A5 paper.
6524 % From romildo@urano.iceb.ufop.br, 2 July 2000.
6525 % He also recommends making @example and @lisp be small.
6526 \def\afivepaper{{\globaldefs = 1
6527 \parskip = 2pt plus 1pt minus 0.1pt
6528 \textleading = 12.5pt
6530 \internalpagesizes{160mm}{120mm}%
6531 {\voffset}{\hoffset}%
6532 {\bindingoffset}{8pt}%
6535 \lispnarrowing = 0.2in
6538 \contentsrightmargin = 0pt
6539 \defbodyindent = 2mm
6543 % A specific text layout, 24x15cm overall, intended for A4 paper.
6544 \def\afourlatex{{\globaldefs = 1
6546 \internalpagesizes{237mm}{150mm}%
6548 {\bindingoffset}{7mm}%
6551 % Must explicitly reset to 0 because we call \afourpaper.
6555 % Use @afourwide to print on A4 paper in landscape format.
6556 \def\afourwide{{\globaldefs = 1
6558 \internalpagesizes{241mm}{165mm}%
6559 {\voffset}{-2.95mm}%
6560 {\bindingoffset}{7mm}%
6565 % @pagesizes TEXTHEIGHT[,TEXTWIDTH]
6566 % Perhaps we should allow setting the margins, \topskip, \parskip,
6567 % and/or leading, also. Or perhaps we should compute them somehow.
6569 \def\pagesizes{\parsearg\pagesizesxxx}
6570 \def\pagesizesxxx#1{\pagesizesyyy #1,,\finish}
6571 \def\pagesizesyyy#1,#2,#3\finish{{%
6572 \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \hsize=#2\relax \fi
6575 \parskip = 3pt plus 2pt minus 1pt
6576 \setleading{\textleading}%
6579 \advance\dimen0 by \voffset
6582 \advance\dimen2 by \normaloffset
6584 \internalpagesizes{#1}{\hsize}%
6585 {\voffset}{\normaloffset}%
6586 {\bindingoffset}{44pt}%
6590 % Set default to letter.
6595 \message{and turning on texinfo input format.}
6597 % Define macros to output various characters with catcode for normal text.
6607 \def\normaldoublequote{"}
6610 \def\normalunderscore{_}
6611 \def\normalverticalbar{|}
6613 \def\normalgreater{>}
6615 \def\normaldollar{$}%$ font-lock fix
6617 % This macro is used to make a character print one way in ttfont
6618 % where it can probably just be output, and another way in other fonts,
6619 % where something hairier probably needs to be done.
6621 % #1 is what to print if we are indeed using \tt; #2 is what to print
6622 % otherwise. Since all the Computer Modern typewriter fonts have zero
6623 % interword stretch (and shrink), and it is reasonable to expect all
6624 % typewriter fonts to have this, we can check that font parameter.
6626 \def\ifusingtt#1#2{\ifdim \fontdimen3\font=0pt #1\else #2\fi}
6628 % Same as above, but check for italic font. Actually this also catches
6629 % non-italic slanted fonts since it is impossible to distinguish them from
6630 % italic fonts. But since this is only used by $ and it uses \sl anyway
6631 % this is not a problem.
6632 \def\ifusingit#1#2{\ifdim \fontdimen1\font>0pt #1\else #2\fi}
6634 % Turn off all special characters except @
6635 % (and those which the user can use as if they were ordinary).
6636 % Most of these we simply print from the \tt font, but for some, we can
6637 % use math or other variants that look better in normal text.
6640 \def\activedoublequote{{\tt\char34}}
6641 \let"=\activedoublequote
6643 \def~{{\tt\char126}}
6649 \def_{\ifusingtt\normalunderscore\_}
6650 % Subroutine for the previous macro.
6651 \def\_{\leavevmode \kern.07em \vbox{\hrule width.3em height.1ex}\kern .07em }
6654 \def|{{\tt\char124}}
6662 \def+{{\tt \char 43}}
6664 \def${\ifusingit{{\sl\$}}\normaldollar}%$ font-lock fix
6666 % Set up an active definition for =, but don't enable it most of the time.
6667 {\catcode`\==\active
6668 \global\def={{\tt \char 61}}}
6673 % If a .fmt file is being used, characters that might appear in a file
6674 % name cannot be active until we have parsed the command line.
6675 % So turn them off again, and have \everyjob (or @setfilename) turn them on.
6676 % \otherifyactive is called near the end of this file.
6677 \def\otherifyactive{\catcode`+=\other \catcode`\_=\other}
6681 % \rawbackslashxx outputs one backslash character in current font,
6683 \global\chardef\rawbackslashxx=`\\
6685 % \rawbackslash defines an active \ to do \rawbackslashxx.
6686 % \otherbackslash defines an active \ to be a literal `\' character with
6688 {\catcode`\\=\active
6689 @gdef@rawbackslash{@let\=@rawbackslashxx}
6690 @gdef@otherbackslash{@let\=@realbackslash}
6693 % \realbackslash is an actual character `\' with catcode other.
6694 {\catcode`\\=\other @gdef@realbackslash{\}}
6696 % \normalbackslash outputs one backslash in fixed width font.
6697 \def\normalbackslash{{\tt\rawbackslashxx}}
6701 % Used sometimes to turn off (effectively) the active characters
6702 % even after parsing them.
6703 @def@turnoffactive{%
6704 @let"=@normaldoublequote
6705 @let\=@realbackslash
6708 @let_=@normalunderscore
6709 @let|=@normalverticalbar
6711 @let>=@normalgreater
6713 @let$=@normaldollar %$ font-lock fix
6716 % Same as @turnoffactive except outputs \ as {\tt\char`\\} instead of
6717 % the literal character `\'. (Thus, \ is not expandable when this is in
6720 @def@normalturnoffactive{@turnoffactive @let\=@normalbackslash}
6722 % Make _ and + \other characters, temporarily.
6723 % This is canceled by @fixbackslash.
6726 % If a .fmt file is being used, we don't want the `\input texinfo' to show up.
6727 % That is what \eatinput is for; after that, the `\' should revert to printing
6730 @gdef@eatinput input texinfo{@fixbackslash}
6731 @global@let\ = @eatinput
6733 % On the other hand, perhaps the file did not have a `\input texinfo'. Then
6734 % the first `\{ in the file would cause an error. This macro tries to fix
6735 % that, assuming it is called before the first `\' could plausibly occur.
6736 % Also back turn on active characters that might appear in the input
6737 % file name, in case not using a pre-dumped format.
6739 @gdef@fixbackslash{%
6740 @ifx\@eatinput @let\ = @normalbackslash @fi
6745 % Say @foo, not \foo, in error messages.
6748 % These look ok in all fonts, so just make them not special.
6749 @catcode`@& = @other
6750 @catcode`@# = @other
6751 @catcode`@% = @other
6753 @c Set initial fonts.
6759 @c eval: (add-hook 'write-file-hooks 'time-stamp)
6760 @c page-delimiter: "^\\\\message"
6761 @c time-stamp-start: "def\\\\texinfoversion{"
6762 @c time-stamp-format: "%:y-%02m-%02d.%02H"
6763 @c time-stamp-end: "}"
6769 arch-tag: e1b36e32-c96e-4135-a41a-0b2efa2ea115