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    1 % texinfo.tex -- TeX macros to handle Texinfo files.
    2 % 
    3 % Load plain if necessary, i.e., if running under initex.
    4 \expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
    5 %
    6 \def\texinfoversion{2013-02-01.11}
    7 %
    8 % Copyright 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
    9 % 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   10 % 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
   11 %
   12 % This texinfo.tex file is free software: you can redistribute it and/or
   13 % modify it under the terms of the GNU General Public License as
   14 % published by the Free Software Foundation, either version 3 of the
   15 % License, or (at your option) any later version.
   16 %
   17 % This texinfo.tex file is distributed in the hope that it will be
   18 % useful, but WITHOUT ANY WARRANTY; without even the implied warranty
   19 % of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   20 % General Public License for more details.
   21 %
   22 % You should have received a copy of the GNU General Public License
   23 % along with this program.  If not, see <http://www.gnu.org/licenses/>.
   24 %
   25 % As a special exception, when this file is read by TeX when processing
   26 % a Texinfo source document, you may use the result without
   27 % restriction. This Exception is an additional permission under section 7
   28 % of the GNU General Public License, version 3 ("GPLv3").
   29 %
   30 % Please try the latest version of texinfo.tex before submitting bug
   31 % reports; you can get the latest version from:
   32 %   http://ftp.gnu.org/gnu/texinfo/ (the Texinfo release area), or
   33 %   http://ftpmirror.gnu.org/texinfo/ (same, via a mirror), or
   34 %   http://www.gnu.org/software/texinfo/ (the Texinfo home page)
   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.
   37 %
   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.
   41 %
   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:
   45 %   tex foo.texi
   46 %   texindex foo.??
   47 %   tex foo.texi
   48 %   tex foo.texi
   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.
   53 %
   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.
   57 %
   58 % The GNU Texinfo home page is http://www.gnu.org/software/texinfo.
   59 
   60 
   61 \message{Loading texinfo [version \texinfoversion]:}
   62 
   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}
   68 
   69 \chardef\other=12
   70 
   71 % We never want plain's \outer definition of \+ in Texinfo.
   72 % For @tex, we can use \tabalign.
   73 \let\+ = \relax
   74 
   75 % Save some plain tex macros whose names we will redefine.
   76 \let\ptexb=\b
   77 \let\ptexbullet=\bullet
   78 \let\ptexc=\c
   79 \let\ptexcomma=\,
   80 \let\ptexdot=\.
   81 \let\ptexdots=\dots
   82 \let\ptexend=\end
   83 \let\ptexequiv=\equiv
   84 \let\ptexexclam=\!
   85 \let\ptexfootnote=\footnote
   86 \let\ptexgtr=>
   87 \let\ptexhat=^
   88 \let\ptexi=\i
   89 \let\ptexindent=\indent
   90 \let\ptexinsert=\insert
   91 \let\ptexlbrace=\{
   92 \let\ptexless=<
   93 \let\ptexnewwrite\newwrite
   94 \let\ptexnoindent=\noindent
   95 \let\ptexplus=+
   96 \let\ptexraggedright=\raggedright
   97 \let\ptexrbrace=\}
   98 \let\ptexslash=\/
   99 \let\ptexstar=\*
  100 \let\ptext=\t
  101 \let\ptextop=\top
  102 {\catcode`\'=\active \global\let\ptexquoteright'}% active in plain's math mode
  103 
  104 % If this character appears in an error message or help string, it
  105 % starts a new line in the output.
  106 \newlinechar = `^^J
  107 
  108 % Use TeX 3.0's \inputlineno to get the line number, for better error
  109 % messages, but if we're using an old version of TeX, don't do anything.
  110 %
  111 \ifx\inputlineno\thisisundefined
  112   \let\linenumber = \empty % Pre-3.0.
  113 \else
  114   \def\linenumber{l.\the\inputlineno:\space}
  115 \fi
  116 
  117 % Set up fixed words for English if not already set.
  118 \ifx\putwordAppendix\undefined  \gdef\putwordAppendix{Appendix}\fi
  119 \ifx\putwordChapter\undefined   \gdef\putwordChapter{Chapter}\fi
  120 \ifx\putworderror\undefined     \gdef\putworderror{error}\fi
  121 \ifx\putwordfile\undefined      \gdef\putwordfile{file}\fi
  122 \ifx\putwordin\undefined        \gdef\putwordin{in}\fi
  123 \ifx\putwordIndexIsEmpty\undefined       \gdef\putwordIndexIsEmpty{(Index is empty)}\fi
  124 \ifx\putwordIndexNonexistent\undefined   \gdef\putwordIndexNonexistent{(Index is nonexistent)}\fi
  125 \ifx\putwordInfo\undefined      \gdef\putwordInfo{Info}\fi
  126 \ifx\putwordInstanceVariableof\undefined \gdef\putwordInstanceVariableof{Instance Variable of}\fi
  127 \ifx\putwordMethodon\undefined  \gdef\putwordMethodon{Method on}\fi
  128 \ifx\putwordNoTitle\undefined   \gdef\putwordNoTitle{No Title}\fi
  129 \ifx\putwordof\undefined        \gdef\putwordof{of}\fi
  130 \ifx\putwordon\undefined        \gdef\putwordon{on}\fi
  131 \ifx\putwordpage\undefined      \gdef\putwordpage{page}\fi
  132 \ifx\putwordsection\undefined   \gdef\putwordsection{section}\fi
  133 \ifx\putwordSection\undefined   \gdef\putwordSection{Section}\fi
  134 \ifx\putwordsee\undefined       \gdef\putwordsee{see}\fi
  135 \ifx\putwordSee\undefined       \gdef\putwordSee{See}\fi
  136 \ifx\putwordShortTOC\undefined  \gdef\putwordShortTOC{Short Contents}\fi
  137 \ifx\putwordTOC\undefined       \gdef\putwordTOC{Table of Contents}\fi
  138 %
  139 \ifx\putwordMJan\undefined \gdef\putwordMJan{January}\fi
  140 \ifx\putwordMFeb\undefined \gdef\putwordMFeb{February}\fi
  141 \ifx\putwordMMar\undefined \gdef\putwordMMar{March}\fi
  142 \ifx\putwordMApr\undefined \gdef\putwordMApr{April}\fi
  143 \ifx\putwordMMay\undefined \gdef\putwordMMay{May}\fi
  144 \ifx\putwordMJun\undefined \gdef\putwordMJun{June}\fi
  145 \ifx\putwordMJul\undefined \gdef\putwordMJul{July}\fi
  146 \ifx\putwordMAug\undefined \gdef\putwordMAug{August}\fi
  147 \ifx\putwordMSep\undefined \gdef\putwordMSep{September}\fi
  148 \ifx\putwordMOct\undefined \gdef\putwordMOct{October}\fi
  149 \ifx\putwordMNov\undefined \gdef\putwordMNov{November}\fi
  150 \ifx\putwordMDec\undefined \gdef\putwordMDec{December}\fi
  151 %
  152 \ifx\putwordDefmac\undefined    \gdef\putwordDefmac{Macro}\fi
  153 \ifx\putwordDefspec\undefined   \gdef\putwordDefspec{Special Form}\fi
  154 \ifx\putwordDefvar\undefined    \gdef\putwordDefvar{Variable}\fi
  155 \ifx\putwordDefopt\undefined    \gdef\putwordDefopt{User Option}\fi
  156 \ifx\putwordDeffunc\undefined   \gdef\putwordDeffunc{Function}\fi
  157 
  158 % Since the category of space is not known, we have to be careful.
  159 \chardef\spacecat = 10
  160 \def\spaceisspace{\catcode`\ =\spacecat}
  161 
  162 % sometimes characters are active, so we need control sequences.
  163 \chardef\ampChar   = `\&
  164 \chardef\colonChar = `\:
  165 \chardef\commaChar = `\,
  166 \chardef\dashChar  = `\-
  167 \chardef\dotChar   = `\.
  168 \chardef\exclamChar= `\!
  169 \chardef\hashChar  = `\#
  170 \chardef\lquoteChar= `\`
  171 \chardef\questChar = `\?
  172 \chardef\rquoteChar= `\'
  173 \chardef\semiChar  = `\;
  174 \chardef\slashChar = `\/
  175 \chardef\underChar = `\_
  176 
  177 % Ignore a token.
  178 %
  179 \def\gobble#1{}
  180 
  181 % The following is used inside several \edef's.
  182 \def\makecsname#1{\expandafter\noexpand\csname#1\endcsname}
  183 
  184 % Hyphenation fixes.
  185 \hyphenation{
  186   Flor-i-da Ghost-script Ghost-view Mac-OS Post-Script
  187   ap-pen-dix bit-map bit-maps
  188   data-base data-bases eshell fall-ing half-way long-est man-u-script
  189   man-u-scripts mini-buf-fer mini-buf-fers over-view par-a-digm
  190   par-a-digms rath-er rec-tan-gu-lar ro-bot-ics se-vere-ly set-up spa-ces
  191   spell-ing spell-ings
  192   stand-alone strong-est time-stamp time-stamps which-ever white-space
  193   wide-spread wrap-around
  194 }
  195 
  196 % Margin to add to right of even pages, to left of odd pages.
  197 \newdimen\bindingoffset
  198 \newdimen\normaloffset
  199 \newdimen\pagewidth \newdimen\pageheight
  200 
  201 % For a final copy, take out the rectangles
  202 % that mark overfull boxes (in case you have decided
  203 % that the text looks ok even though it passes the margin).
  204 %
  205 \def\finalout{\overfullrule=0pt }
  206 
  207 % Sometimes it is convenient to have everything in the transcript file
  208 % and nothing on the terminal.  We don't just call \tracingall here,
  209 % since that produces some useless output on the terminal.  We also make
  210 % some effort to order the tracing commands to reduce output in the log
  211 % file; cf. trace.sty in LaTeX.
  212 %
  213 \def\gloggingall{\begingroup \globaldefs = 1 \loggingall \endgroup}%
  214 \def\loggingall{%
  215   \tracingstats2
  216   \tracingpages1
  217   \tracinglostchars2  % 2 gives us more in etex
  218   \tracingparagraphs1
  219   \tracingoutput1
  220   \tracingmacros2
  221   \tracingrestores1
  222   \showboxbreadth\maxdimen \showboxdepth\maxdimen
  223   \ifx\eTeXversion\thisisundefined\else % etex gives us more logging
  224     \tracingscantokens1
  225     \tracingifs1
  226     \tracinggroups1
  227     \tracingnesting2
  228     \tracingassigns1
  229   \fi
  230   \tracingcommands3  % 3 gives us more in etex
  231   \errorcontextlines16
  232 }%
  233 
  234 % @errormsg{MSG}.  Do the index-like expansions on MSG, but if things
  235 % aren't perfect, it's not the end of the world, being an error message,
  236 % after all.
  237 % 
  238 \def\errormsg{\begingroup \indexnofonts \doerrormsg}
  239 \def\doerrormsg#1{\errmessage{#1}}
  240 
  241 % add check for \lastpenalty to plain's definitions.  If the last thing
  242 % we did was a \nobreak, we don't want to insert more space.
  243 %
  244 \def\smallbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\smallskipamount
  245   \removelastskip\penalty-50\smallskip\fi\fi}
  246 \def\medbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\medskipamount
  247   \removelastskip\penalty-100\medskip\fi\fi}
  248 \def\bigbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\bigskipamount
  249   \removelastskip\penalty-200\bigskip\fi\fi}
  250 
  251 % Do @cropmarks to get crop marks.
  252 %
  253 \newif\ifcropmarks
  254 \let\cropmarks = \cropmarkstrue
  255 %
  256 % Dimensions to add cropmarks at corners.
  257 % Added by P. A. MacKay, 12 Nov. 1986
  258 %
  259 \newdimen\outerhsize \newdimen\outervsize % set by the paper size routines
  260 \newdimen\cornerlong  \cornerlong=1pc
  261 \newdimen\cornerthick \cornerthick=.3pt
  262 \newdimen\topandbottommargin \topandbottommargin=.75in
  263 
  264 % Output a mark which sets \thischapter, \thissection and \thiscolor.
  265 % We dump everything together because we only have one kind of mark.
  266 % This works because we only use \botmark / \topmark, not \firstmark.
  267 %
  268 % A mark contains a subexpression of the \ifcase ... \fi construct.
  269 % \get*marks macros below extract the needed part using \ifcase.
  270 %
  271 % Another complication is to let the user choose whether \thischapter
  272 % (\thissection) refers to the chapter (section) in effect at the top
  273 % of a page, or that at the bottom of a page.  The solution is
  274 % described on page 260 of The TeXbook.  It involves outputting two
  275 % marks for the sectioning macros, one before the section break, and
  276 % one after.  I won't pretend I can describe this better than DEK...
  277 \def\domark{%
  278   \toks0=\expandafter{\lastchapterdefs}%
  279   \toks2=\expandafter{\lastsectiondefs}%
  280   \toks4=\expandafter{\prevchapterdefs}%
  281   \toks6=\expandafter{\prevsectiondefs}%
  282   \toks8=\expandafter{\lastcolordefs}%
  283   \mark{%
  284                    \the\toks0 \the\toks2
  285       \noexpand\or \the\toks4 \the\toks6
  286     \noexpand\else \the\toks8
  287   }%
  288 }
  289 % \topmark doesn't work for the very first chapter (after the title
  290 % page or the contents), so we use \firstmark there -- this gets us
  291 % the mark with the chapter defs, unless the user sneaks in, e.g.,
  292 % @setcolor (or @url, or @link, etc.) between @contents and the very
  293 % first @chapter.
  294 \def\gettopheadingmarks{%
  295   \ifcase0\topmark\fi
  296   \ifx\thischapter\empty \ifcase0\firstmark\fi \fi
  297 }
  298 \def\getbottomheadingmarks{\ifcase1\botmark\fi}
  299 \def\getcolormarks{\ifcase2\topmark\fi}
  300 
  301 % Avoid "undefined control sequence" errors.
  302 \def\lastchapterdefs{}
  303 \def\lastsectiondefs{}
  304 \def\prevchapterdefs{}
  305 \def\prevsectiondefs{}
  306 \def\lastcolordefs{}
  307 
  308 % Main output routine.
  309 \chardef\PAGE = 255
  310 \output = {\onepageout{\pagecontents\PAGE}}
  311 
  312 \newbox\headlinebox
  313 \newbox\footlinebox
  314 
  315 % \onepageout takes a vbox as an argument.  Note that \pagecontents
  316 % does insertions, but you have to call it yourself.
  317 \def\onepageout#1{%
  318   \ifcropmarks \hoffset=0pt \else \hoffset=\normaloffset \fi
  319   %
  320   \ifodd\pageno  \advance\hoffset by \bindingoffset
  321   \else \advance\hoffset by -\bindingoffset\fi
  322   %
  323   % Do this outside of the \shipout so @code etc. will be expanded in
  324   % the headline as they should be, not taken literally (outputting ''code).
  325   \ifodd\pageno \getoddheadingmarks \else \getevenheadingmarks \fi
  326   \setbox\headlinebox = \vbox{\let\hsize=\pagewidth \makeheadline}%
  327   \ifodd\pageno \getoddfootingmarks \else \getevenfootingmarks \fi
  328   \setbox\footlinebox = \vbox{\let\hsize=\pagewidth \makefootline}%
  329   %
  330   {%
  331     % Have to do this stuff outside the \shipout because we want it to
  332     % take effect in \write's, yet the group defined by the \vbox ends
  333     % before the \shipout runs.
  334     %
  335     \indexdummies         % don't expand commands in the output.
  336     \normalturnoffactive  % \ in index entries must not stay \, e.g., if
  337                % the page break happens to be in the middle of an example.
  338                % We don't want .vr (or whatever) entries like this:
  339                % \entry{{\tt \indexbackslash }acronym}{32}{\code {\acronym}}
  340                % "\acronym" won't work when it's read back in;
  341                % it needs to be
  342                % {\code {{\tt \backslashcurfont }acronym}
  343     \shipout\vbox{%
  344       % Do this early so pdf references go to the beginning of the page.
  345       \ifpdfmakepagedest \pdfdest name{\the\pageno} xyz\fi
  346       %
  347       \ifcropmarks \vbox to \outervsize\bgroup
  348         \hsize = \outerhsize
  349         \vskip-\topandbottommargin
  350         \vtop to0pt{%
  351           \line{\ewtop\hfil\ewtop}%
  352           \nointerlineskip
  353           \line{%
  354             \vbox{\moveleft\cornerthick\nstop}%
  355             \hfill
  356             \vbox{\moveright\cornerthick\nstop}%
  357           }%
  358           \vss}%
  359         \vskip\topandbottommargin
  360         \line\bgroup
  361           \hfil % center the page within the outer (page) hsize.
  362           \ifodd\pageno\hskip\bindingoffset\fi
  363           \vbox\bgroup
  364       \fi
  365       %
  366       \unvbox\headlinebox
  367       \pagebody{#1}%
  368       \ifdim\ht\footlinebox > 0pt
  369         % Only leave this space if the footline is nonempty.
  370         % (We lessened \vsize for it in \oddfootingyyy.)
  371         % The \baselineskip=24pt in plain's \makefootline has no effect.
  372         \vskip 24pt
  373         \unvbox\footlinebox
  374       \fi
  375       %
  376       \ifcropmarks
  377           \egroup % end of \vbox\bgroup
  378         \hfil\egroup % end of (centering) \line\bgroup
  379         \vskip\topandbottommargin plus1fill minus1fill
  380         \boxmaxdepth = \cornerthick
  381         \vbox to0pt{\vss
  382           \line{%
  383             \vbox{\moveleft\cornerthick\nsbot}%
  384             \hfill
  385             \vbox{\moveright\cornerthick\nsbot}%
  386           }%
  387           \nointerlineskip
  388           \line{\ewbot\hfil\ewbot}%
  389         }%
  390       \egroup % \vbox from first cropmarks clause
  391       \fi
  392     }% end of \shipout\vbox
  393   }% end of group with \indexdummies
  394   \advancepageno
  395   \ifnum\outputpenalty>-20000 \else\dosupereject\fi
  396 }
  397 
  398 \newinsert\margin \dimen\margin=\maxdimen
  399 
  400 \def\pagebody#1{\vbox to\pageheight{\boxmaxdepth=\maxdepth #1}}
  401 {\catcode`\@ =11
  402 \gdef\pagecontents#1{\ifvoid\topins\else\unvbox\topins\fi
  403 % marginal hacks, juha@viisa.uucp (Juha Takala)
  404 \ifvoid\margin\else % marginal info is present
  405   \rlap{\kern\hsize\vbox to\z@{\kern1pt\box\margin \vss}}\fi
  406 \dimen@=\dp#1\relax \unvbox#1\relax
  407 \ifvoid\footins\else\vskip\skip\footins\footnoterule \unvbox\footins\fi
  408 \ifr@ggedbottom \kern-\dimen@ \vfil \fi}
  409 }
  410 
  411 % Here are the rules for the cropmarks.  Note that they are
  412 % offset so that the space between them is truly \outerhsize or \outervsize
  413 % (P. A. MacKay, 12 November, 1986)
  414 %
  415 \def\ewtop{\vrule height\cornerthick depth0pt width\cornerlong}
  416 \def\nstop{\vbox
  417   {\hrule height\cornerthick depth\cornerlong width\cornerthick}}
  418 \def\ewbot{\vrule height0pt depth\cornerthick width\cornerlong}
  419 \def\nsbot{\vbox
  420   {\hrule height\cornerlong depth\cornerthick width\cornerthick}}
  421 
  422 % Parse an argument, then pass it to #1.  The argument is the rest of
  423 % the input line (except we remove a trailing comment).  #1 should be a
  424 % macro which expects an ordinary undelimited TeX argument.
  425 %
  426 \def\parsearg{\parseargusing{}}
  427 \def\parseargusing#1#2{%
  428   \def\argtorun{#2}%
  429   \begingroup
  430     \obeylines
  431     \spaceisspace
  432     #1%
  433     \parseargline\empty% Insert the \empty token, see \finishparsearg below.
  434 }
  435 
  436 {\obeylines %
  437   \gdef\parseargline#1^^M{%
  438     \endgroup % End of the group started in \parsearg.
  439     \argremovecomment #1\comment\ArgTerm%
  440   }%
  441 }
  442 
  443 % First remove any @comment, then any @c comment.
  444 \def\argremovecomment#1\comment#2\ArgTerm{\argremovec #1\c\ArgTerm}
  445 \def\argremovec#1\c#2\ArgTerm{\argcheckspaces#1\^^M\ArgTerm}
  446 
  447 % Each occurrence of `\^^M' or `<space>\^^M' is replaced by a single space.
  448 %
  449 % \argremovec might leave us with trailing space, e.g.,
  450 %    @end itemize  @c foo
  451 % This space token undergoes the same procedure and is eventually removed
  452 % by \finishparsearg.
  453 %
  454 \def\argcheckspaces#1\^^M{\argcheckspacesX#1\^^M \^^M}
  455 \def\argcheckspacesX#1 \^^M{\argcheckspacesY#1\^^M}
  456 \def\argcheckspacesY#1\^^M#2\^^M#3\ArgTerm{%
  457   \def\temp{#3}%
  458   \ifx\temp\empty
  459     % Do not use \next, perhaps the caller of \parsearg uses it; reuse \temp:
  460     \let\temp\finishparsearg
  461   \else
  462     \let\temp\argcheckspaces
  463   \fi
  464   % Put the space token in:
  465   \temp#1 #3\ArgTerm
  466 }
  467 
  468 % If a _delimited_ argument is enclosed in braces, they get stripped; so
  469 % to get _exactly_ the rest of the line, we had to prevent such situation.
  470 % We prepended an \empty token at the very beginning and we expand it now,
  471 % just before passing the control to \argtorun.
  472 % (Similarly, we have to think about #3 of \argcheckspacesY above: it is
  473 % either the null string, or it ends with \^^M---thus there is no danger
  474 % that a pair of braces would be stripped.
  475 %
  476 % But first, we have to remove the trailing space token.
  477 %
  478 \def\finishparsearg#1 \ArgTerm{\expandafter\argtorun\expandafter{#1}}
  479 
  480 % \parseargdef\foo{...}
  481 %   is roughly equivalent to
  482 % \def\foo{\parsearg\Xfoo}
  483 % \def\Xfoo#1{...}
  484 %
  485 % Actually, I use \csname\string\foo\endcsname, ie. \\foo, as it is my
  486 % favourite TeX trick.  --kasal, 16nov03
  487 
  488 \def\parseargdef#1{%
  489   \expandafter \doparseargdef \csname\string#1\endcsname #1%
  490 }
  491 \def\doparseargdef#1#2{%
  492   \def#2{\parsearg#1}%
  493   \def#1##1%
  494 }
  495 
  496 % Several utility definitions with active space:
  497 {
  498   \obeyspaces
  499   \gdef\obeyedspace{ }
  500 
  501   % Make each space character in the input produce a normal interword
  502   % space in the output.  Don't allow a line break at this space, as this
  503   % is used only in environments like @example, where each line of input
  504   % should produce a line of output anyway.
  505   %
  506   \gdef\sepspaces{\obeyspaces\let =\tie}
  507 
  508   % If an index command is used in an @example environment, any spaces
  509   % therein should become regular spaces in the raw index file, not the
  510   % expansion of \tie (\leavevmode \penalty \@M \ ).
  511   \gdef\unsepspaces{\let =\space}
  512 }
  513 
  514 
  515 \def\flushcr{\ifx\par\lisppar \def\next##1{}\else \let\next=\relax \fi \next}
  516 
  517 % Define the framework for environments in texinfo.tex.  It's used like this:
  518 %
  519 %   \envdef\foo{...}
  520 %   \def\Efoo{...}
  521 %
  522 % It's the responsibility of \envdef to insert \begingroup before the
  523 % actual body; @end closes the group after calling \Efoo.  \envdef also
  524 % defines \thisenv, so the current environment is known; @end checks
  525 % whether the environment name matches.  The \checkenv macro can also be
  526 % used to check whether the current environment is the one expected.
  527 %
  528 % Non-false conditionals (@iftex, @ifset) don't fit into this, so they
  529 % are not treated as environments; they don't open a group.  (The
  530 % implementation of @end takes care not to call \endgroup in this
  531 % special case.)
  532 
  533 
  534 % At run-time, environments start with this:
  535 \def\startenvironment#1{\begingroup\def\thisenv{#1}}
  536 % initialize
  537 \let\thisenv\empty
  538 
  539 % ... but they get defined via ``\envdef\foo{...}'':
  540 \long\def\envdef#1#2{\def#1{\startenvironment#1#2}}
  541 \def\envparseargdef#1#2{\parseargdef#1{\startenvironment#1#2}}
  542 
  543 % Check whether we're in the right environment:
  544 \def\checkenv#1{%
  545   \def\temp{#1}%
  546   \ifx\thisenv\temp
  547   \else
  548     \badenverr
  549   \fi
  550 }
  551 
  552 % Environment mismatch, #1 expected:
  553 \def\badenverr{%
  554   \errhelp = \EMsimple
  555   \errmessage{This command can appear only \inenvironment\temp,
  556     not \inenvironment\thisenv}%
  557 }
  558 \def\inenvironment#1{%
  559   \ifx#1\empty
  560     outside of any environment%
  561   \else
  562     in environment \expandafter\string#1%
  563   \fi
  564 }
  565 
  566 % @end foo executes the definition of \Efoo.
  567 % But first, it executes a specialized version of \checkenv
  568 %
  569 \parseargdef\end{%
  570   \if 1\csname iscond.#1\endcsname
  571   \else
  572     % The general wording of \badenverr may not be ideal.
  573     \expandafter\checkenv\csname#1\endcsname
  574     \csname E#1\endcsname
  575     \endgroup
  576   \fi
  577 }
  578 
  579 \newhelp\EMsimple{Press RETURN to continue.}
  580 
  581 
  582 % Be sure we're in horizontal mode when doing a tie, since we make space
  583 % equivalent to this in @example-like environments. Otherwise, a space
  584 % at the beginning of a line will start with \penalty -- and
  585 % since \penalty is valid in vertical mode, we'd end up putting the
  586 % penalty on the vertical list instead of in the new paragraph.
  587 {\catcode`@ = 11
  588  % Avoid using \@M directly, because that causes trouble
  589  % if the definition is written into an index file.
  590  \global\let\tiepenalty = \@M
  591  \gdef\tie{\leavevmode\penalty\tiepenalty\ }
  592 }
  593 
  594 % @: forces normal size whitespace following.
  595 \def\:{\spacefactor=1000 }
  596 
  597 % @* forces a line break.
  598 \def\*{\unskip\hfil\break\hbox{}\ignorespaces}
  599 
  600 % @/ allows a line break.
  601 \let\/=\allowbreak
  602 
  603 % @. is an end-of-sentence period.
  604 \def\.{.\spacefactor=\endofsentencespacefactor\space}
  605 
  606 % @! is an end-of-sentence bang.
  607 \def\!{!\spacefactor=\endofsentencespacefactor\space}
  608 
  609 % @? is an end-of-sentence query.
  610 \def\?{?\spacefactor=\endofsentencespacefactor\space}
  611 
  612 % @frenchspacing on|off  says whether to put extra space after punctuation.
  613 %
  614 \def\onword{on}
  615 \def\offword{off}
  616 %
  617 \parseargdef\frenchspacing{%
  618   \def\temp{#1}%
  619   \ifx\temp\onword \plainfrenchspacing
  620   \else\ifx\temp\offword \plainnonfrenchspacing
  621   \else
  622     \errhelp = \EMsimple
  623     \errmessage{Unknown @frenchspacing option `\temp', must be on|off}%
  624   \fi\fi
  625 }
  626 
  627 % @w prevents a word break.  Without the \leavevmode, @w at the
  628 % beginning of a paragraph, when TeX is still in vertical mode, would
  629 % produce a whole line of output instead of starting the paragraph.
  630 \def\w#1{\leavevmode\hbox{#1}}
  631 
  632 % @group ... @end group forces ... to be all on one page, by enclosing
  633 % it in a TeX vbox.  We use \vtop instead of \vbox to construct the box
  634 % to keep its height that of a normal line.  According to the rules for
  635 % \topskip (p.114 of the TeXbook), the glue inserted is
  636 % max (\topskip - \ht (first item), 0).  If that height is large,
  637 % therefore, no glue is inserted, and the space between the headline and
  638 % the text is small, which looks bad.
  639 %
  640 % Another complication is that the group might be very large.  This can
  641 % cause the glue on the previous page to be unduly stretched, because it
  642 % does not have much material.  In this case, it's better to add an
  643 % explicit \vfill so that the extra space is at the bottom.  The
  644 % threshold for doing this is if the group is more than \vfilllimit
  645 % percent of a page (\vfilllimit can be changed inside of @tex).
  646 %
  647 \newbox\groupbox
  648 \def\vfilllimit{0.7}
  649 %
  650 \envdef\group{%
  651   \ifnum\catcode`\^^M=\active \else
  652     \errhelp = \groupinvalidhelp
  653     \errmessage{@group invalid in context where filling is enabled}%
  654   \fi
  655   \startsavinginserts
  656   %
  657   \setbox\groupbox = \vtop\bgroup
  658     % Do @comment since we are called inside an environment such as
  659     % @example, where each end-of-line in the input causes an
  660     % end-of-line in the output.  We don't want the end-of-line after
  661     % the `@group' to put extra space in the output.  Since @group
  662     % should appear on a line by itself (according to the Texinfo
  663     % manual), we don't worry about eating any user text.
  664     \comment
  665 }
  666 %
  667 % The \vtop produces a box with normal height and large depth; thus, TeX puts
  668 % \baselineskip glue before it, and (when the next line of text is done)
  669 % \lineskip glue after it.  Thus, space below is not quite equal to space
  670 % above.  But it's pretty close.
  671 \def\Egroup{%
  672     % To get correct interline space between the last line of the group
  673     % and the first line afterwards, we have to propagate \prevdepth.
  674     \endgraf % Not \par, as it may have been set to \lisppar.
  675     \global\dimen1 = \prevdepth
  676   \egroup           % End the \vtop.
  677   % \dimen0 is the vertical size of the group's box.
  678   \dimen0 = \ht\groupbox  \advance\dimen0 by \dp\groupbox
  679   % \dimen2 is how much space is left on the page (more or less).
  680   \dimen2 = \pageheight   \advance\dimen2 by -\pagetotal
  681   % if the group doesn't fit on the current page, and it's a big big
  682   % group, force a page break.
  683   \ifdim \dimen0 > \dimen2
  684     \ifdim \pagetotal < \vfilllimit\pageheight
  685       \page
  686     \fi
  687   \fi
  688   \box\groupbox
  689   \prevdepth = \dimen1
  690   \checkinserts
  691 }
  692 %
  693 % TeX puts in an \escapechar (i.e., `@') at the beginning of the help
  694 % message, so this ends up printing `@group can only ...'.
  695 %
  696 \newhelp\groupinvalidhelp{%
  697 group can only be used in environments such as @example,^^J%
  698 where each line of input produces a line of output.}
  699 
  700 % @need space-in-mils
  701 % forces a page break if there is not space-in-mils remaining.
  702 
  703 \newdimen\mil  \mil=0.001in
  704 
  705 \parseargdef\need{%
  706   % Ensure vertical mode, so we don't make a big box in the middle of a
  707   % paragraph.
  708   \par
  709   %
  710   % If the @need value is less than one line space, it's useless.
  711   \dimen0 = #1\mil
  712   \dimen2 = \ht\strutbox
  713   \advance\dimen2 by \dp\strutbox
  714   \ifdim\dimen0 > \dimen2
  715     %
  716     % Do a \strut just to make the height of this box be normal, so the
  717     % normal leading is inserted relative to the preceding line.
  718     % And a page break here is fine.
  719     \vtop to #1\mil{\strut\vfil}%
  720     %
  721     % TeX does not even consider page breaks if a penalty added to the
  722     % main vertical list is 10000 or more.  But in order to see if the
  723     % empty box we just added fits on the page, we must make it consider
  724     % page breaks.  On the other hand, we don't want to actually break the
  725     % page after the empty box.  So we use a penalty of 9999.
  726     %
  727     % There is an extremely small chance that TeX will actually break the
  728     % page at this \penalty, if there are no other feasible breakpoints in
  729     % sight.  (If the user is using lots of big @group commands, which
  730     % almost-but-not-quite fill up a page, TeX will have a hard time doing
  731     % good page breaking, for example.)  However, I could not construct an
  732     % example where a page broke at this \penalty; if it happens in a real
  733     % document, then we can reconsider our strategy.
  734     \penalty9999
  735     %
  736     % Back up by the size of the box, whether we did a page break or not.
  737     \kern -#1\mil
  738     %
  739     % Do not allow a page break right after this kern.
  740     \nobreak
  741   \fi
  742 }
  743 
  744 % @br   forces paragraph break (and is undocumented).
  745 
  746 \let\br = \par
  747 
  748 % @page forces the start of a new page.
  749 %
  750 \def\page{\par\vfill\supereject}
  751 
  752 % @exdent text....
  753 % outputs text on separate line in roman font, starting at standard page margin
  754 
  755 % This records the amount of indent in the innermost environment.
  756 % That's how much \exdent should take out.
  757 \newskip\exdentamount
  758 
  759 % This defn is used inside fill environments such as @defun.
  760 \parseargdef\exdent{\hfil\break\hbox{\kern -\exdentamount{\rm#1}}\hfil\break}
  761 
  762 % This defn is used inside nofill environments such as @example.
  763 \parseargdef\nofillexdent{{\advance \leftskip by -\exdentamount
  764   \leftline{\hskip\leftskip{\rm#1}}}}
  765 
  766 % @inmargin{WHICH}{TEXT} puts TEXT in the WHICH margin next to the current
  767 % paragraph.  For more general purposes, use the \margin insertion
  768 % class.  WHICH is `l' or `r'.  Not documented, written for gawk manual.
  769 %
  770 \newskip\inmarginspacing \inmarginspacing=1cm
  771 \def\strutdepth{\dp\strutbox}
  772 %
  773 \def\doinmargin#1#2{\strut\vadjust{%
  774   \nobreak
  775   \kern-\strutdepth
  776   \vtop to \strutdepth{%
  777     \baselineskip=\strutdepth
  778     \vss
  779     % if you have multiple lines of stuff to put here, you'll need to
  780     % make the vbox yourself of the appropriate size.
  781     \ifx#1l%
  782       \llap{\ignorespaces #2\hskip\inmarginspacing}%
  783     \else
  784       \rlap{\hskip\hsize \hskip\inmarginspacing \ignorespaces #2}%
  785     \fi
  786     \null
  787   }%
  788 }}
  789 \def\inleftmargin{\doinmargin l}
  790 \def\inrightmargin{\doinmargin r}
  791 %
  792 % @inmargin{TEXT [, RIGHT-TEXT]}
  793 % (if RIGHT-TEXT is given, use TEXT for left page, RIGHT-TEXT for right;
  794 % else use TEXT for both).
  795 %
  796 \def\inmargin#1{\parseinmargin #1,,\finish}
  797 \def\parseinmargin#1,#2,#3\finish{% not perfect, but better than nothing.
  798   \setbox0 = \hbox{\ignorespaces #2}%
  799   \ifdim\wd0 > 0pt
  800     \def\lefttext{#1}%  have both texts
  801     \def\righttext{#2}%
  802   \else
  803     \def\lefttext{#1}%  have only one text
  804     \def\righttext{#1}%
  805   \fi
  806   %
  807   \ifodd\pageno
  808     \def\temp{\inrightmargin\righttext}% odd page -> outside is right margin
  809   \else
  810     \def\temp{\inleftmargin\lefttext}%
  811   \fi
  812   \temp
  813 }
  814 
  815 % @| inserts a changebar to the left of the current line.  It should
  816 % surround any changed text.  This approach does *not* work if the
  817 % change spans more than two lines of output.  To handle that, we would
  818 % have adopt a much more difficult approach (putting marks into the main
  819 % vertical list for the beginning and end of each change).  This command
  820 % is not documented, not supported, and doesn't work.
  821 %
  822 \def\|{%
  823   % \vadjust can only be used in horizontal mode.
  824   \leavevmode
  825   %
  826   % Append this vertical mode material after the current line in the output.
  827   \vadjust{%
  828     % We want to insert a rule with the height and depth of the current
  829     % leading; that is exactly what \strutbox is supposed to record.
  830     \vskip-\baselineskip
  831     %
  832     % \vadjust-items are inserted at the left edge of the type.  So
  833     % the \llap here moves out into the left-hand margin.
  834     \llap{%
  835       %
  836       % For a thicker or thinner bar, change the `1pt'.
  837       \vrule height\baselineskip width1pt
  838       %
  839       % This is the space between the bar and the text.
  840       \hskip 12pt
  841     }%
  842   }%
  843 }
  844 
  845 % @include FILE -- \input text of FILE.
  846 %
  847 \def\include{\parseargusing\filenamecatcodes\includezzz}
  848 \def\includezzz#1{%
  849   \pushthisfilestack
  850   \def\thisfile{#1}%
  851   {%
  852     \makevalueexpandable  % we want to expand any @value in FILE.
  853     \turnoffactive        % and allow special characters in the expansion
  854     \indexnofonts         % Allow `@@' and other weird things in file names.
  855     \wlog{texinfo.tex: doing @include of #1^^J}%
  856     \edef\temp{\noexpand\input #1 }%
  857     %
  858     % This trickery is to read FILE outside of a group, in case it makes
  859     % definitions, etc.
  860     \expandafter
  861   }\temp
  862   \popthisfilestack
  863 }
  864 \def\filenamecatcodes{%
  865   \catcode`\\=\other
  866   \catcode`~=\other
  867   \catcode`^=\other
  868   \catcode`_=\other
  869   \catcode`|=\other
  870   \catcode`<=\other
  871   \catcode`>=\other
  872   \catcode`+=\other
  873   \catcode`-=\other
  874   \catcode`\`=\other
  875   \catcode`\'=\other
  876 }
  877 
  878 \def\pushthisfilestack{%
  879   \expandafter\pushthisfilestackX\popthisfilestack\StackTerm
  880 }
  881 \def\pushthisfilestackX{%
  882   \expandafter\pushthisfilestackY\thisfile\StackTerm
  883 }
  884 \def\pushthisfilestackY #1\StackTerm #2\StackTerm {%
  885   \gdef\popthisfilestack{\gdef\thisfile{#1}\gdef\popthisfilestack{#2}}%
  886 }
  887 
  888 \def\popthisfilestack{\errthisfilestackempty}
  889 \def\errthisfilestackempty{\errmessage{Internal error:
  890   the stack of filenames is empty.}}
  891 %
  892 \def\thisfile{}
  893 
  894 % @center line
  895 % outputs that line, centered.
  896 %
  897 \parseargdef\center{%
  898   \ifhmode
  899     \let\centersub\centerH
  900   \else
  901     \let\centersub\centerV
  902   \fi
  903   \centersub{\hfil \ignorespaces#1\unskip \hfil}%
  904   \let\centersub\relax % don't let the definition persist, just in case
  905 }
  906 \def\centerH#1{{%
  907   \hfil\break
  908   \advance\hsize by -\leftskip
  909   \advance\hsize by -\rightskip
  910   \line{#1}%
  911   \break
  912 }}
  913 %
  914 \newcount\centerpenalty
  915 \def\centerV#1{%
  916   % The idea here is the same as in \startdefun, \cartouche, etc.: if
  917   % @center is the first thing after a section heading, we need to wipe
  918   % out the negative parskip inserted by \sectionheading, but still
  919   % prevent a page break here.
  920   \centerpenalty = \lastpenalty
  921   \ifnum\centerpenalty>10000 \vskip\parskip \fi
  922   \ifnum\centerpenalty>9999 \penalty\centerpenalty \fi
  923   \line{\kern\leftskip #1\kern\rightskip}%
  924 }
  925 
  926 % @sp n   outputs n lines of vertical space
  927 %
  928 \parseargdef\sp{\vskip #1\baselineskip}
  929 
  930 % @comment ...line which is ignored...
  931 % @c is the same as @comment
  932 % @ignore ... @end ignore  is another way to write a comment
  933 %
  934 \def\comment{\begingroup \catcode`\^^M=\other%
  935 \catcode`\@=\other \catcode`\{=\other \catcode`\}=\other%
  936 \commentxxx}
  937 {\catcode`\^^M=\other \gdef\commentxxx#1^^M{\endgroup}}
  938 %
  939 \let\c=\comment
  940 
  941 % @paragraphindent NCHARS
  942 % We'll use ems for NCHARS, close enough.
  943 % NCHARS can also be the word `asis' or `none'.
  944 % We cannot feasibly implement @paragraphindent asis, though.
  945 %
  946 \def\asisword{asis} % no translation, these are keywords
  947 \def\noneword{none}
  948 %
  949 \parseargdef\paragraphindent{%
  950   \def\temp{#1}%
  951   \ifx\temp\asisword
  952   \else
  953     \ifx\temp\noneword
  954       \defaultparindent = 0pt
  955     \else
  956       \defaultparindent = #1em
  957     \fi
  958   \fi
  959   \parindent = \defaultparindent
  960 }
  961 
  962 % @exampleindent NCHARS
  963 % We'll use ems for NCHARS like @paragraphindent.
  964 % It seems @exampleindent asis isn't necessary, but
  965 % I preserve it to make it similar to @paragraphindent.
  966 \parseargdef\exampleindent{%
  967   \def\temp{#1}%
  968   \ifx\temp\asisword
  969   \else
  970     \ifx\temp\noneword
  971       \lispnarrowing = 0pt
  972     \else
  973       \lispnarrowing = #1em
  974     \fi
  975   \fi
  976 }
  977 
  978 % @firstparagraphindent WORD
  979 % If WORD is `none', then suppress indentation of the first paragraph
  980 % after a section heading.  If WORD is `insert', then do indent at such
  981 % paragraphs.
  982 %
  983 % The paragraph indentation is suppressed or not by calling
  984 % \suppressfirstparagraphindent, which the sectioning commands do.
  985 % We switch the definition of this back and forth according to WORD.
  986 % By default, we suppress indentation.
  987 %
  988 \def\suppressfirstparagraphindent{\dosuppressfirstparagraphindent}
  989 \def\insertword{insert}
  990 %
  991 \parseargdef\firstparagraphindent{%
  992   \def\temp{#1}%
  993   \ifx\temp\noneword
  994     \let\suppressfirstparagraphindent = \dosuppressfirstparagraphindent
  995   \else\ifx\temp\insertword
  996     \let\suppressfirstparagraphindent = \relax
  997   \else
  998     \errhelp = \EMsimple
  999     \errmessage{Unknown @firstparagraphindent option `\temp'}%
 1000   \fi\fi
 1001 }
 1002 
 1003 % Here is how we actually suppress indentation.  Redefine \everypar to
 1004 % \kern backwards by \parindent, and then reset itself to empty.
 1005 %
 1006 % We also make \indent itself not actually do anything until the next
 1007 % paragraph.
 1008 %
 1009 \gdef\dosuppressfirstparagraphindent{%
 1010   \gdef\indent{%
 1011     \restorefirstparagraphindent
 1012     \indent
 1013   }%
 1014   \gdef\noindent{%
 1015     \restorefirstparagraphindent
 1016     \noindent
 1017   }%
 1018   \global\everypar = {%
 1019     \kern -\parindent
 1020     \restorefirstparagraphindent
 1021   }%
 1022 }
 1023 
 1024 \gdef\restorefirstparagraphindent{%
 1025   \global \let \indent = \ptexindent
 1026   \global \let \noindent = \ptexnoindent
 1027   \global \everypar = {}%
 1028 }
 1029 
 1030 
 1031 % @refill is a no-op.
 1032 \let\refill=\relax
 1033 
 1034 % If working on a large document in chapters, it is convenient to
 1035 % be able to disable indexing, cross-referencing, and contents, for test runs.
 1036 % This is done with @novalidate (before @setfilename).
 1037 %
 1038 \newif\iflinks \linkstrue % by default we want the aux files.
 1039 \let\novalidate = \linksfalse
 1040 
 1041 % @setfilename is done at the beginning of every texinfo file.
 1042 % So open here the files we need to have open while reading the input.
 1043 % This makes it possible to make a .fmt file for texinfo.
 1044 \def\setfilename{%
 1045    \fixbackslash  % Turn off hack to swallow `\input texinfo'.
 1046    \iflinks
 1047      \tryauxfile
 1048      % Open the new aux file.  TeX will close it automatically at exit.
 1049      \immediate\openout\auxfile=\jobname.aux
 1050    \fi % \openindices needs to do some work in any case.
 1051    \openindices
 1052    \let\setfilename=\comment % Ignore extra @setfilename cmds.
 1053    %
 1054    % If texinfo.cnf is present on the system, read it.
 1055    % Useful for site-wide @afourpaper, etc.
 1056    \openin 1 texinfo.cnf
 1057    \ifeof 1 \else \input texinfo.cnf \fi
 1058    \closein 1
 1059    %
 1060    \comment % Ignore the actual filename.
 1061 }
 1062 
 1063 % Called from \setfilename.
 1064 %
 1065 \def\openindices{%
 1066   \newindex{cp}%
 1067   \newcodeindex{fn}%
 1068   \newcodeindex{vr}%
 1069   \newcodeindex{tp}%
 1070   \newcodeindex{ky}%
 1071   \newcodeindex{pg}%
 1072 }
 1073 
 1074 % @bye.
 1075 \outer\def\bye{\pagealignmacro\tracingstats=1\ptexend}
 1076 
 1077 
 1078 \message{pdf,}
 1079 % adobe `portable' document format
 1080 \newcount\tempnum
 1081 \newcount\lnkcount
 1082 \newtoks\filename
 1083 \newcount\filenamelength
 1084 \newcount\pgn
 1085 \newtoks\toksA
 1086 \newtoks\toksB
 1087 \newtoks\toksC
 1088 \newtoks\toksD
 1089 \newbox\boxA
 1090 \newcount\countA
 1091 \newif\ifpdf
 1092 \newif\ifpdfmakepagedest
 1093 
 1094 % when pdftex is run in dvi mode, \pdfoutput is defined (so \pdfoutput=1
 1095 % can be set).  So we test for \relax and 0 as well as being undefined.
 1096 \ifx\pdfoutput\thisisundefined
 1097 \else
 1098   \ifx\pdfoutput\relax
 1099   \else
 1100     \ifcase\pdfoutput
 1101     \else
 1102       \pdftrue
 1103     \fi
 1104   \fi
 1105 \fi
 1106 
 1107 % PDF uses PostScript string constants for the names of xref targets,
 1108 % for display in the outlines, and in other places.  Thus, we have to
 1109 % double any backslashes.  Otherwise, a name like "\node" will be
 1110 % interpreted as a newline (\n), followed by o, d, e.  Not good.
 1111 % 
 1112 % See http://www.ntg.nl/pipermail/ntg-pdftex/2004-July/000654.html and
 1113 % related messages.  The final outcome is that it is up to the TeX user
 1114 % to double the backslashes and otherwise make the string valid, so
 1115 % that's what we do.  pdftex 1.30.0 (ca.2005) introduced a primitive to
 1116 % do this reliably, so we use it.
 1117 
 1118 % #1 is a control sequence in which to do the replacements,
 1119 % which we \xdef.
 1120 \def\txiescapepdf#1{%
 1121   \ifx\pdfescapestring\thisisundefined
 1122     % No primitive available; should we give a warning or log?
 1123     % Many times it won't matter.
 1124   \else
 1125     % The expandable \pdfescapestring primitive escapes parentheses,
 1126     % backslashes, and other special chars.
 1127     \xdef#1{\pdfescapestring{#1}}%
 1128   \fi
 1129 }
 1130 
 1131 \newhelp\nopdfimagehelp{Texinfo supports .png, .jpg, .jpeg, and .pdf images
 1132 with PDF output, and none of those formats could be found.  (.eps cannot
 1133 be supported due to the design of the PDF format; use regular TeX (DVI
 1134 output) for that.)}
 1135 
 1136 \ifpdf
 1137   %
 1138   % Color manipulation macros based on pdfcolor.tex,
 1139   % except using rgb instead of cmyk; the latter is said to render as a
 1140   % very dark gray on-screen and a very dark halftone in print, instead
 1141   % of actual black.
 1142   \def\rgbDarkRed{0.50 0.09 0.12}
 1143   \def\rgbBlack{0 0 0}
 1144   %
 1145   % k sets the color for filling (usual text, etc.);
 1146   % K sets the color for stroking (thin rules, e.g., normal _'s).
 1147   \def\pdfsetcolor#1{\pdfliteral{#1 rg  #1 RG}}
 1148   %
 1149   % Set color, and create a mark which defines \thiscolor accordingly,
 1150   % so that \makeheadline knows which color to restore.
 1151   \def\setcolor#1{%
 1152     \xdef\lastcolordefs{\gdef\noexpand\thiscolor{#1}}%
 1153     \domark
 1154     \pdfsetcolor{#1}%
 1155   }
 1156   %
 1157   \def\maincolor{\rgbBlack}
 1158   \pdfsetcolor{\maincolor}
 1159   \edef\thiscolor{\maincolor}
 1160   \def\lastcolordefs{}
 1161   %
 1162   \def\makefootline{%
 1163     \baselineskip24pt
 1164     \line{\pdfsetcolor{\maincolor}\the\footline}%
 1165   }
 1166   %
 1167   \def\makeheadline{%
 1168     \vbox to 0pt{%
 1169       \vskip-22.5pt
 1170       \line{%
 1171         \vbox to8.5pt{}%
 1172         % Extract \thiscolor definition from the marks.
 1173         \getcolormarks
 1174         % Typeset the headline with \maincolor, then restore the color.
 1175         \pdfsetcolor{\maincolor}\the\headline\pdfsetcolor{\thiscolor}%
 1176       }%
 1177       \vss
 1178     }%
 1179     \nointerlineskip
 1180   }
 1181   %
 1182   %
 1183   \pdfcatalog{/PageMode /UseOutlines}
 1184   %
 1185   % #1 is image name, #2 width (might be empty/whitespace), #3 height (ditto).
 1186   \def\dopdfimage#1#2#3{%
 1187     \def\pdfimagewidth{#2}\setbox0 = \hbox{\ignorespaces #2}%
 1188     \def\pdfimageheight{#3}\setbox2 = \hbox{\ignorespaces #3}%
 1189     %
 1190     % pdftex (and the PDF format) support .pdf, .png, .jpg (among
 1191     % others).  Let's try in that order, PDF first since if
 1192     % someone has a scalable image, presumably better to use that than a
 1193     % bitmap.
 1194     \let\pdfimgext=\empty
 1195     \begingroup
 1196       \openin 1 #1.pdf \ifeof 1
 1197         \openin 1 #1.PDF \ifeof 1
 1198           \openin 1 #1.png \ifeof 1
 1199             \openin 1 #1.jpg \ifeof 1
 1200               \openin 1 #1.jpeg \ifeof 1
 1201                 \openin 1 #1.JPG \ifeof 1
 1202                   \errhelp = \nopdfimagehelp
 1203                   \errmessage{Could not find image file #1 for pdf}%
 1204                 \else \gdef\pdfimgext{JPG}%
 1205                 \fi
 1206               \else \gdef\pdfimgext{jpeg}%
 1207               \fi
 1208             \else \gdef\pdfimgext{jpg}%
 1209             \fi
 1210           \else \gdef\pdfimgext{png}%
 1211           \fi
 1212         \else \gdef\pdfimgext{PDF}%
 1213         \fi
 1214       \else \gdef\pdfimgext{pdf}%
 1215       \fi
 1216       \closein 1
 1217     \endgroup
 1218     %
 1219     % without \immediate, ancient pdftex seg faults when the same image is
 1220     % included twice.  (Version 3.14159-pre-1.0-unofficial-20010704.)
 1221     \ifnum\pdftexversion < 14
 1222       \immediate\pdfimage
 1223     \else
 1224       \immediate\pdfximage
 1225     \fi
 1226       \ifdim \wd0 >0pt width \pdfimagewidth \fi
 1227       \ifdim \wd2 >0pt height \pdfimageheight \fi
 1228       \ifnum\pdftexversion<13
 1229          #1.\pdfimgext
 1230        \else
 1231          {#1.\pdfimgext}%
 1232        \fi
 1233     \ifnum\pdftexversion < 14 \else
 1234       \pdfrefximage \pdflastximage
 1235     \fi}
 1236   %
 1237   \def\pdfmkdest#1{{%
 1238     % We have to set dummies so commands such as @code, and characters
 1239     % such as \, aren't expanded when present in a section title.
 1240     \indexnofonts
 1241     \turnoffactive
 1242     \makevalueexpandable
 1243     \def\pdfdestname{#1}%
 1244     \txiescapepdf\pdfdestname
 1245     \safewhatsit{\pdfdest name{\pdfdestname} xyz}%
 1246   }}
 1247   %
 1248   % used to mark target names; must be expandable.
 1249   \def\pdfmkpgn#1{#1}
 1250   %
 1251   % by default, use a color that is dark enough to print on paper as
 1252   % nearly black, but still distinguishable for online viewing.
 1253   \def\urlcolor{\rgbDarkRed}
 1254   \def\linkcolor{\rgbDarkRed}
 1255   \def\endlink{\setcolor{\maincolor}\pdfendlink}
 1256   %
 1257   % Adding outlines to PDF; macros for calculating structure of outlines
 1258   % come from Petr Olsak
 1259   \def\expnumber#1{\expandafter\ifx\csname#1\endcsname\relax 0%
 1260     \else \csname#1\endcsname \fi}
 1261   \def\advancenumber#1{\tempnum=\expnumber{#1}\relax
 1262     \advance\tempnum by 1
 1263     \expandafter\xdef\csname#1\endcsname{\the\tempnum}}
 1264   %
 1265   % #1 is the section text, which is what will be displayed in the
 1266   % outline by the pdf viewer.  #2 is the pdf expression for the number
 1267   % of subentries (or empty, for subsubsections).  #3 is the node text,
 1268   % which might be empty if this toc entry had no corresponding node.
 1269   % #4 is the page number
 1270   %
 1271   \def\dopdfoutline#1#2#3#4{%
 1272     % Generate a link to the node text if that exists; else, use the
 1273     % page number.  We could generate a destination for the section
 1274     % text in the case where a section has no node, but it doesn't
 1275     % seem worth the trouble, since most documents are normally structured.
 1276     \edef\pdfoutlinedest{#3}%
 1277     \ifx\pdfoutlinedest\empty
 1278       \def\pdfoutlinedest{#4}%
 1279     \else
 1280       \txiescapepdf\pdfoutlinedest
 1281     \fi
 1282     %
 1283     % Also escape PDF chars in the display string.
 1284     \edef\pdfoutlinetext{#1}%
 1285     \txiescapepdf\pdfoutlinetext
 1286     %
 1287     \pdfoutline goto name{\pdfmkpgn{\pdfoutlinedest}}#2{\pdfoutlinetext}%
 1288   }
 1289   %
 1290   \def\pdfmakeoutlines{%
 1291     \begingroup
 1292       % Read toc silently, to get counts of subentries for \pdfoutline.
 1293       \def\partentry##1##2##3##4{}% ignore parts in the outlines
 1294       \def\numchapentry##1##2##3##4{%
 1295     \def\thischapnum{##2}%
 1296     \def\thissecnum{0}%
 1297     \def\thissubsecnum{0}%
 1298       }%
 1299       \def\numsecentry##1##2##3##4{%
 1300     \advancenumber{chap\thischapnum}%
 1301     \def\thissecnum{##2}%
 1302     \def\thissubsecnum{0}%
 1303       }%
 1304       \def\numsubsecentry##1##2##3##4{%
 1305     \advancenumber{sec\thissecnum}%
 1306     \def\thissubsecnum{##2}%
 1307       }%
 1308       \def\numsubsubsecentry##1##2##3##4{%
 1309     \advancenumber{subsec\thissubsecnum}%
 1310       }%
 1311       \def\thischapnum{0}%
 1312       \def\thissecnum{0}%
 1313       \def\thissubsecnum{0}%
 1314       %
 1315       % use \def rather than \let here because we redefine \chapentry et
 1316       % al. a second time, below.
 1317       \def\appentry{\numchapentry}%
 1318       \def\appsecentry{\numsecentry}%
 1319       \def\appsubsecentry{\numsubsecentry}%
 1320       \def\appsubsubsecentry{\numsubsubsecentry}%
 1321       \def\unnchapentry{\numchapentry}%
 1322       \def\unnsecentry{\numsecentry}%
 1323       \def\unnsubsecentry{\numsubsecentry}%
 1324       \def\unnsubsubsecentry{\numsubsubsecentry}%
 1325       \readdatafile{toc}%
 1326       %
 1327       % Read toc second time, this time actually producing the outlines.
 1328       % The `-' means take the \expnumber as the absolute number of
 1329       % subentries, which we calculated on our first read of the .toc above.
 1330       %
 1331       % We use the node names as the destinations.
 1332       \def\numchapentry##1##2##3##4{%
 1333         \dopdfoutline{##1}{count-\expnumber{chap##2}}{##3}{##4}}%
 1334       \def\numsecentry##1##2##3##4{%
 1335         \dopdfoutline{##1}{count-\expnumber{sec##2}}{##3}{##4}}%
 1336       \def\numsubsecentry##1##2##3##4{%
 1337         \dopdfoutline{##1}{count-\expnumber{subsec##2}}{##3}{##4}}%
 1338       \def\numsubsubsecentry##1##2##3##4{% count is always zero
 1339         \dopdfoutline{##1}{}{##3}{##4}}%
 1340       %
 1341       % PDF outlines are displayed using system fonts, instead of
 1342       % document fonts.  Therefore we cannot use special characters,
 1343       % since the encoding is unknown.  For example, the eogonek from
 1344       % Latin 2 (0xea) gets translated to a | character.  Info from
 1345       % Staszek Wawrykiewicz, 19 Jan 2004 04:09:24 +0100.
 1346       %
 1347       % TODO this right, we have to translate 8-bit characters to
 1348       % their "best" equivalent, based on the @documentencoding.  Too
 1349       % much work for too little return.  Just use the ASCII equivalents
 1350       % we use for the index sort strings.
 1351       % 
 1352       \indexnofonts
 1353       \setupdatafile
 1354       % We can have normal brace characters in the PDF outlines, unlike
 1355       % Texinfo index files.  So set that up.
 1356       \def\{{\lbracecharliteral}%
 1357       \def\}{\rbracecharliteral}%
 1358       \catcode`\\=\active \otherbackslash
 1359       \input \tocreadfilename
 1360     \endgroup
 1361   }
 1362   {\catcode`[=1 \catcode`]=2
 1363    \catcode`{=\other \catcode`}=\other
 1364    \gdef\lbracecharliteral[{]%
 1365    \gdef\rbracecharliteral[}]%
 1366   ]
 1367   %
 1368   \def\skipspaces#1{\def\PP{#1}\def\D{|}%
 1369     \ifx\PP\D\let\nextsp\relax
 1370     \else\let\nextsp\skipspaces
 1371       \addtokens{\filename}{\PP}%
 1372       \advance\filenamelength by 1
 1373     \fi
 1374     \nextsp}
 1375   \def\getfilename#1{%
 1376     \filenamelength=0
 1377     % If we don't expand the argument now, \skipspaces will get
 1378     % snagged on things like "@value{foo}".
 1379     \edef\temp{#1}%
 1380     \expandafter\skipspaces\temp|\relax
 1381   }
 1382   \ifnum\pdftexversion < 14
 1383     \let \startlink \pdfannotlink
 1384   \else
 1385     \let \startlink \pdfstartlink
 1386   \fi
 1387   % make a live url in pdf output.
 1388   \def\pdfurl#1{%
 1389     \begingroup
 1390       % it seems we really need yet another set of dummies; have not
 1391       % tried to figure out what each command should do in the context
 1392       % of @url.  for now, just make @/ a no-op, that's the only one
 1393       % people have actually reported a problem with.
 1394       %
 1395       \normalturnoffactive
 1396       \def\@{@}%
 1397       \let\/=\empty
 1398       \makevalueexpandable
 1399       % do we want to go so far as to use \indexnofonts instead of just
 1400       % special-casing \var here?
 1401       \def\var##1{##1}%
 1402       %
 1403       \leavevmode\setcolor{\urlcolor}%
 1404       \startlink attr{/Border [0 0 0]}%
 1405         user{/Subtype /Link /A << /S /URI /URI (#1) >>}%
 1406     \endgroup}
 1407   \def\pdfgettoks#1.{\setbox\boxA=\hbox{\toksA={#1.}\toksB={}\maketoks}}
 1408   \def\addtokens#1#2{\edef\addtoks{\noexpand#1={\the#1#2}}\addtoks}
 1409   \def\adn#1{\addtokens{\toksC}{#1}\global\countA=1\let\next=\maketoks}
 1410   \def\poptoks#1#2|ENDTOKS|{\let\first=#1\toksD={#1}\toksA={#2}}
 1411   \def\maketoks{%
 1412     \expandafter\poptoks\the\toksA|ENDTOKS|\relax
 1413     \ifx\first0\adn0
 1414     \else\ifx\first1\adn1 \else\ifx\first2\adn2 \else\ifx\first3\adn3
 1415     \else\ifx\first4\adn4 \else\ifx\first5\adn5 \else\ifx\first6\adn6
 1416     \else\ifx\first7\adn7 \else\ifx\first8\adn8 \else\ifx\first9\adn9
 1417     \else
 1418       \ifnum0=\countA\else\makelink\fi
 1419       \ifx\first.\let\next=\done\else
 1420         \let\next=\maketoks
 1421         \addtokens{\toksB}{\the\toksD}
 1422         \ifx\first,\addtokens{\toksB}{\space}\fi
 1423       \fi
 1424     \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
 1425     \next}
 1426   \def\makelink{\addtokens{\toksB}%
 1427     {\noexpand\pdflink{\the\toksC}}\toksC={}\global\countA=0}
 1428   \def\pdflink#1{%
 1429     \startlink attr{/Border [0 0 0]} goto name{\pdfmkpgn{#1}}
 1430     \setcolor{\linkcolor}#1\endlink}
 1431   \def\done{\edef\st{\global\noexpand\toksA={\the\toksB}}\st}
 1432 \else
 1433   % non-pdf mode
 1434   \let\pdfmkdest = \gobble
 1435   \let\pdfurl = \gobble
 1436   \let\endlink = \relax
 1437   \let\setcolor = \gobble
 1438   \let\pdfsetcolor = \gobble
 1439   \let\pdfmakeoutlines = \relax
 1440 \fi  % \ifx\pdfoutput
 1441 
 1442 
 1443 \message{fonts,}
 1444 
 1445 % Change the current font style to #1, remembering it in \curfontstyle.
 1446 % For now, we do not accumulate font styles: @b{@i{foo}} prints foo in
 1447 % italics, not bold italics.
 1448 %
 1449 \def\setfontstyle#1{%
 1450   \def\curfontstyle{#1}% not as a control sequence, because we are \edef'd.
 1451   \csname ten#1\endcsname  % change the current font
 1452 }
 1453 
 1454 % Select #1 fonts with the current style.
 1455 %
 1456 \def\selectfonts#1{\csname #1fonts\endcsname \csname\curfontstyle\endcsname}
 1457 
 1458 \def\rm{\fam=0 \setfontstyle{rm}}
 1459 \def\it{\fam=\itfam \setfontstyle{it}}
 1460 \def\sl{\fam=\slfam \setfontstyle{sl}}
 1461 \def\bf{\fam=\bffam \setfontstyle{bf}}\def\bfstylename{bf}
 1462 \def\tt{\fam=\ttfam \setfontstyle{tt}}
 1463 
 1464 % Unfortunately, we have to override this for titles and the like, since
 1465 % in those cases "rm" is bold.  Sigh.
 1466 \def\rmisbold{\rm\def\curfontstyle{bf}}
 1467 
 1468 % Texinfo sort of supports the sans serif font style, which plain TeX does not.
 1469 % So we set up a \sf.
 1470 \newfam\sffam
 1471 \def\sf{\fam=\sffam \setfontstyle{sf}}
 1472 \let\li = \sf % Sometimes we call it \li, not \sf.
 1473 
 1474 % We don't need math for this font style.
 1475 \def\ttsl{\setfontstyle{ttsl}}
 1476 
 1477 
 1478 % Set the baselineskip to #1, and the lineskip and strut size
 1479 % correspondingly.  There is no deep meaning behind these magic numbers
 1480 % used as factors; they just match (closely enough) what Knuth defined.
 1481 %
 1482 \def\lineskipfactor{.08333}
 1483 \def\strutheightpercent{.70833}
 1484 \def\strutdepthpercent {.29167}
 1485 %
 1486 % can get a sort of poor man's double spacing by redefining this.
 1487 \def\baselinefactor{1}
 1488 %
 1489 \newdimen\textleading
 1490 \def\setleading#1{%
 1491   \dimen0 = #1\relax
 1492   \normalbaselineskip = \baselinefactor\dimen0
 1493   \normallineskip = \lineskipfactor\normalbaselineskip
 1494   \normalbaselines
 1495   \setbox\strutbox =\hbox{%
 1496     \vrule width0pt height\strutheightpercent\baselineskip
 1497                     depth \strutdepthpercent \baselineskip
 1498   }%
 1499 }
 1500 
 1501 % PDF CMaps.  See also LaTeX's t1.cmap.
 1502 %
 1503 % do nothing with this by default.
 1504 \expandafter\let\csname cmapOT1\endcsname\gobble
 1505 \expandafter\let\csname cmapOT1IT\endcsname\gobble
 1506 \expandafter\let\csname cmapOT1TT\endcsname\gobble
 1507 
 1508 % if we are producing pdf, and we have \pdffontattr, then define cmaps.
 1509 % (\pdffontattr was introduced many years ago, but people still run
 1510 % older pdftex's; it's easy to conditionalize, so we do.)
 1511 \ifpdf \ifx\pdffontattr\thisisundefined \else
 1512   \begingroup
 1513     \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
 1514     \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
 1515 %%DocumentNeededResources: ProcSet (CIDInit)
 1516 %%IncludeResource: ProcSet (CIDInit)
 1517 %%BeginResource: CMap (TeX-OT1-0)
 1518 %%Title: (TeX-OT1-0 TeX OT1 0)
 1519 %%Version: 1.000
 1520 %%EndComments
 1521 /CIDInit /ProcSet findresource begin
 1522 12 dict begin
 1523 begincmap
 1524 /CIDSystemInfo
 1525 << /Registry (TeX)
 1526 /Ordering (OT1)
 1527 /Supplement 0
 1528 >> def
 1529 /CMapName /TeX-OT1-0 def
 1530 /CMapType 2 def
 1531 1 begincodespacerange
 1532 <00> <7F>
 1533 endcodespacerange
 1534 8 beginbfrange
 1535 <00> <01> <0393>
 1536 <09> <0A> <03A8>
 1537 <23> <26> <0023>
 1538 <28> <3B> <0028>
 1539 <3F> <5B> <003F>
 1540 <5D> <5E> <005D>
 1541 <61> <7A> <0061>
 1542 <7B> <7C> <2013>
 1543 endbfrange
 1544 40 beginbfchar
 1545 <02> <0398>
 1546 <03> <039B>
 1547 <04> <039E>
 1548 <05> <03A0>
 1549 <06> <03A3>
 1550 <07> <03D2>
 1551 <08> <03A6>
 1552 <0B> <00660066>
 1553 <0C> <00660069>
 1554 <0D> <0066006C>
 1555 <0E> <006600660069>
 1556 <0F> <00660066006C>
 1557 <10> <0131>
 1558 <11> <0237>
 1559 <12> <0060>
 1560 <13> <00B4>
 1561 <14> <02C7>
 1562 <15> <02D8>
 1563 <16> <00AF>
 1564 <17> <02DA>
 1565 <18> <00B8>
 1566 <19> <00DF>
 1567 <1A> <00E6>
 1568 <1B> <0153>
 1569 <1C> <00F8>
 1570 <1D> <00C6>
 1571 <1E> <0152>
 1572 <1F> <00D8>
 1573 <21> <0021>
 1574 <22> <201D>
 1575 <27> <2019>
 1576 <3C> <00A1>
 1577 <3D> <003D>
 1578 <3E> <00BF>
 1579 <5C> <201C>
 1580 <5F> <02D9>
 1581 <60> <2018>
 1582 <7D> <02DD>
 1583 <7E> <007E>
 1584 <7F> <00A8>
 1585 endbfchar
 1586 endcmap
 1587 CMapName currentdict /CMap defineresource pop
 1588 end
 1589 end
 1590 %%EndResource
 1591 %%EOF
 1592     }\endgroup
 1593   \expandafter\edef\csname cmapOT1\endcsname#1{%
 1594     \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
 1595   }%
 1596 %
 1597 % \cmapOT1IT
 1598   \begingroup
 1599     \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
 1600     \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
 1601 %%DocumentNeededResources: ProcSet (CIDInit)
 1602 %%IncludeResource: ProcSet (CIDInit)
 1603 %%BeginResource: CMap (TeX-OT1IT-0)
 1604 %%Title: (TeX-OT1IT-0 TeX OT1IT 0)
 1605 %%Version: 1.000
 1606 %%EndComments
 1607 /CIDInit /ProcSet findresource begin
 1608 12 dict begin
 1609 begincmap
 1610 /CIDSystemInfo
 1611 << /Registry (TeX)
 1612 /Ordering (OT1IT)
 1613 /Supplement 0
 1614 >> def
 1615 /CMapName /TeX-OT1IT-0 def
 1616 /CMapType 2 def
 1617 1 begincodespacerange
 1618 <00> <7F>
 1619 endcodespacerange
 1620 8 beginbfrange
 1621 <00> <01> <0393>
 1622 <09> <0A> <03A8>
 1623 <25> <26> <0025>
 1624 <28> <3B> <0028>
 1625 <3F> <5B> <003F>
 1626 <5D> <5E> <005D>
 1627 <61> <7A> <0061>
 1628 <7B> <7C> <2013>
 1629 endbfrange
 1630 42 beginbfchar
 1631 <02> <0398>
 1632 <03> <039B>
 1633 <04> <039E>
 1634 <05> <03A0>
 1635 <06> <03A3>
 1636 <07> <03D2>
 1637 <08> <03A6>
 1638 <0B> <00660066>
 1639 <0C> <00660069>
 1640 <0D> <0066006C>
 1641 <0E> <006600660069>
 1642 <0F> <00660066006C>
 1643 <10> <0131>
 1644 <11> <0237>
 1645 <12> <0060>
 1646 <13> <00B4>
 1647 <14> <02C7>
 1648 <15> <02D8>
 1649 <16> <00AF>
 1650 <17> <02DA>
 1651 <18> <00B8>
 1652 <19> <00DF>
 1653 <1A> <00E6>
 1654 <1B> <0153>
 1655 <1C> <00F8>
 1656 <1D> <00C6>
 1657 <1E> <0152>
 1658 <1F> <00D8>
 1659 <21> <0021>
 1660 <22> <201D>
 1661 <23> <0023>
 1662 <24> <00A3>
 1663 <27> <2019>
 1664 <3C> <00A1>
 1665 <3D> <003D>
 1666 <3E> <00BF>
 1667 <5C> <201C>
 1668 <5F> <02D9>
 1669 <60> <2018>
 1670 <7D> <02DD>
 1671 <7E> <007E>
 1672 <7F> <00A8>
 1673 endbfchar
 1674 endcmap
 1675 CMapName currentdict /CMap defineresource pop
 1676 end
 1677 end
 1678 %%EndResource
 1679 %%EOF
 1680     }\endgroup
 1681   \expandafter\edef\csname cmapOT1IT\endcsname#1{%
 1682     \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
 1683   }%
 1684 %
 1685 % \cmapOT1TT
 1686   \begingroup
 1687     \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
 1688     \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
 1689 %%DocumentNeededResources: ProcSet (CIDInit)
 1690 %%IncludeResource: ProcSet (CIDInit)
 1691 %%BeginResource: CMap (TeX-OT1TT-0)
 1692 %%Title: (TeX-OT1TT-0 TeX OT1TT 0)
 1693 %%Version: 1.000
 1694 %%EndComments
 1695 /CIDInit /ProcSet findresource begin
 1696 12 dict begin
 1697 begincmap
 1698 /CIDSystemInfo
 1699 << /Registry (TeX)
 1700 /Ordering (OT1TT)
 1701 /Supplement 0
 1702 >> def
 1703 /CMapName /TeX-OT1TT-0 def
 1704 /CMapType 2 def
 1705 1 begincodespacerange
 1706 <00> <7F>
 1707 endcodespacerange
 1708 5 beginbfrange
 1709 <00> <01> <0393>
 1710 <09> <0A> <03A8>
 1711 <21> <26> <0021>
 1712 <28> <5F> <0028>
 1713 <61> <7E> <0061>
 1714 endbfrange
 1715 32 beginbfchar
 1716 <02> <0398>
 1717 <03> <039B>
 1718 <04> <039E>
 1719 <05> <03A0>
 1720 <06> <03A3>
 1721 <07> <03D2>
 1722 <08> <03A6>
 1723 <0B> <2191>
 1724 <0C> <2193>
 1725 <0D> <0027>
 1726 <0E> <00A1>
 1727 <0F> <00BF>
 1728 <10> <0131>
 1729 <11> <0237>
 1730 <12> <0060>
 1731 <13> <00B4>
 1732 <14> <02C7>
 1733 <15> <02D8>
 1734 <16> <00AF>
 1735 <17> <02DA>
 1736 <18> <00B8>
 1737 <19> <00DF>
 1738 <1A> <00E6>
 1739 <1B> <0153>
 1740 <1C> <00F8>
 1741 <1D> <00C6>
 1742 <1E> <0152>
 1743 <1F> <00D8>
 1744 <20> <2423>
 1745 <27> <2019>
 1746 <60> <2018>
 1747 <7F> <00A8>
 1748 endbfchar
 1749 endcmap
 1750 CMapName currentdict /CMap defineresource pop
 1751 end
 1752 end
 1753 %%EndResource
 1754 %%EOF
 1755     }\endgroup
 1756   \expandafter\edef\csname cmapOT1TT\endcsname#1{%
 1757     \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
 1758   }%
 1759 \fi\fi
 1760 
 1761 
 1762 % Set the font macro #1 to the font named \fontprefix#2.
 1763 % #3 is the font's design size, #4 is a scale factor, #5 is the CMap
 1764 % encoding (only OT1, OT1IT and OT1TT are allowed, or empty to omit).
 1765 % Example:
 1766 % #1 = \textrm
 1767 % #2 = \rmshape
 1768 % #3 = 10
 1769 % #4 = \mainmagstep
 1770 % #5 = OT1
 1771 %
 1772 \def\setfont#1#2#3#4#5{%
 1773   \font#1=\fontprefix#2#3 scaled #4
 1774   \csname cmap#5\endcsname#1%
 1775 }
 1776 % This is what gets called when #5 of \setfont is empty.
 1777 \let\cmap\gobble
 1778 %
 1779 % (end of cmaps)
 1780 
 1781 % Use cm as the default font prefix.
 1782 % To specify the font prefix, you must define \fontprefix
 1783 % before you read in texinfo.tex.
 1784 \ifx\fontprefix\thisisundefined
 1785 \def\fontprefix{cm}
 1786 \fi
 1787 % Support font families that don't use the same naming scheme as CM.
 1788 \def\rmshape{r}
 1789 \def\rmbshape{bx}               % where the normal face is bold
 1790 \def\bfshape{b}
 1791 \def\bxshape{bx}
 1792 \def\ttshape{tt}
 1793 \def\ttbshape{tt}
 1794 \def\ttslshape{sltt}
 1795 \def\itshape{ti}
 1796 \def\itbshape{bxti}
 1797 \def\slshape{sl}
 1798 \def\slbshape{bxsl}
 1799 \def\sfshape{ss}
 1800 \def\sfbshape{ss}
 1801 \def\scshape{csc}
 1802 \def\scbshape{csc}
 1803 
 1804 % Definitions for a main text size of 11pt.  (The default in Texinfo.)
 1805 %
 1806 \def\definetextfontsizexi{%
 1807 % Text fonts (11.2pt, magstep1).
 1808 \def\textnominalsize{11pt}
 1809 \edef\mainmagstep{\magstephalf}
 1810 \setfont\textrm\rmshape{10}{\mainmagstep}{OT1}
 1811 \setfont\texttt\ttshape{10}{\mainmagstep}{OT1TT}
 1812 \setfont\textbf\bfshape{10}{\mainmagstep}{OT1}
 1813 \setfont\textit\itshape{10}{\mainmagstep}{OT1IT}
 1814 \setfont\textsl\slshape{10}{\mainmagstep}{OT1}
 1815 \setfont\textsf\sfshape{10}{\mainmagstep}{OT1}
 1816 \setfont\textsc\scshape{10}{\mainmagstep}{OT1}
 1817 \setfont\textttsl\ttslshape{10}{\mainmagstep}{OT1TT}
 1818 \font\texti=cmmi10 scaled \mainmagstep
 1819 \font\textsy=cmsy10 scaled \mainmagstep
 1820 \def\textecsize{1095}
 1821 
 1822 % A few fonts for @defun names and args.
 1823 \setfont\defbf\bfshape{10}{\magstep1}{OT1}
 1824 \setfont\deftt\ttshape{10}{\magstep1}{OT1TT}
 1825 \setfont\defttsl\ttslshape{10}{\magstep1}{OT1TT}
 1826 \def\df{\let\tentt=\deftt \let\tenbf = \defbf \let\tenttsl=\defttsl \bf}
 1827 
 1828 % Fonts for indices, footnotes, small examples (9pt).
 1829 \def\smallnominalsize{9pt}
 1830 \setfont\smallrm\rmshape{9}{1000}{OT1}
 1831 \setfont\smalltt\ttshape{9}{1000}{OT1TT}
 1832 \setfont\smallbf\bfshape{10}{900}{OT1}
 1833 \setfont\smallit\itshape{9}{1000}{OT1IT}
 1834 \setfont\smallsl\slshape{9}{1000}{OT1}
 1835 \setfont\smallsf\sfshape{9}{1000}{OT1}
 1836 \setfont\smallsc\scshape{10}{900}{OT1}
 1837 \setfont\smallttsl\ttslshape{10}{900}{OT1TT}
 1838 \font\smalli=cmmi9
 1839 \font\smallsy=cmsy9
 1840 \def\smallecsize{0900}
 1841 
 1842 % Fonts for small examples (8pt).
 1843 \def\smallernominalsize{8pt}
 1844 \setfont\smallerrm\rmshape{8}{1000}{OT1}
 1845 \setfont\smallertt\ttshape{8}{1000}{OT1TT}
 1846 \setfont\smallerbf\bfshape{10}{800}{OT1}
 1847 \setfont\smallerit\itshape{8}{1000}{OT1IT}
 1848 \setfont\smallersl\slshape{8}{1000}{OT1}
 1849 \setfont\smallersf\sfshape{8}{1000}{OT1}
 1850 \setfont\smallersc\scshape{10}{800}{OT1}
 1851 \setfont\smallerttsl\ttslshape{10}{800}{OT1TT}
 1852 \font\smalleri=cmmi8
 1853 \font\smallersy=cmsy8
 1854 \def\smallerecsize{0800}
 1855 
 1856 % Fonts for title page (20.4pt):
 1857 \def\titlenominalsize{20pt}
 1858 \setfont\titlerm\rmbshape{12}{\magstep3}{OT1}
 1859 \setfont\titleit\itbshape{10}{\magstep4}{OT1IT}
 1860 \setfont\titlesl\slbshape{10}{\magstep4}{OT1}
 1861 \setfont\titlett\ttbshape{12}{\magstep3}{OT1TT}
 1862 \setfont\titlettsl\ttslshape{10}{\magstep4}{OT1TT}
 1863 \setfont\titlesf\sfbshape{17}{\magstep1}{OT1}
 1864 \let\titlebf=\titlerm
 1865 \setfont\titlesc\scbshape{10}{\magstep4}{OT1}
 1866 \font\titlei=cmmi12 scaled \magstep3
 1867 \font\titlesy=cmsy10 scaled \magstep4
 1868 \def\titleecsize{2074}
 1869 
 1870 % Chapter (and unnumbered) fonts (17.28pt).
 1871 \def\chapnominalsize{17pt}
 1872 \setfont\chaprm\rmbshape{12}{\magstep2}{OT1}
 1873 \setfont\chapit\itbshape{10}{\magstep3}{OT1IT}
 1874 \setfont\chapsl\slbshape{10}{\magstep3}{OT1}
 1875 \setfont\chaptt\ttbshape{12}{\magstep2}{OT1TT}
 1876 \setfont\chapttsl\ttslshape{10}{\magstep3}{OT1TT}
 1877 \setfont\chapsf\sfbshape{17}{1000}{OT1}
 1878 \let\chapbf=\chaprm
 1879 \setfont\chapsc\scbshape{10}{\magstep3}{OT1}
 1880 \font\chapi=cmmi12 scaled \magstep2
 1881 \font\chapsy=cmsy10 scaled \magstep3
 1882 \def\chapecsize{1728}
 1883 
 1884 % Section fonts (14.4pt).
 1885 \def\secnominalsize{14pt}
 1886 \setfont\secrm\rmbshape{12}{\magstep1}{OT1}
 1887 \setfont\secit\itbshape{10}{\magstep2}{OT1IT}
 1888 \setfont\secsl\slbshape{10}{\magstep2}{OT1}
 1889 \setfont\sectt\ttbshape{12}{\magstep1}{OT1TT}
 1890 \setfont\secttsl\ttslshape{10}{\magstep2}{OT1TT}
 1891 \setfont\secsf\sfbshape{12}{\magstep1}{OT1}
 1892 \let\secbf\secrm
 1893 \setfont\secsc\scbshape{10}{\magstep2}{OT1}
 1894 \font\seci=cmmi12 scaled \magstep1
 1895 \font\secsy=cmsy10 scaled \magstep2
 1896 \def\sececsize{1440}
 1897 
 1898 % Subsection fonts (13.15pt).
 1899 \def\ssecnominalsize{13pt}
 1900 \setfont\ssecrm\rmbshape{12}{\magstephalf}{OT1}
 1901 \setfont\ssecit\itbshape{10}{1315}{OT1IT}
 1902 \setfont\ssecsl\slbshape{10}{1315}{OT1}
 1903 \setfont\ssectt\ttbshape{12}{\magstephalf}{OT1TT}
 1904 \setfont\ssecttsl\ttslshape{10}{1315}{OT1TT}
 1905 \setfont\ssecsf\sfbshape{12}{\magstephalf}{OT1}
 1906 \let\ssecbf\ssecrm
 1907 \setfont\ssecsc\scbshape{10}{1315}{OT1}
 1908 \font\sseci=cmmi12 scaled \magstephalf
 1909 \font\ssecsy=cmsy10 scaled 1315
 1910 \def\ssececsize{1200}
 1911 
 1912 % Reduced fonts for @acro in text (10pt).
 1913 \def\reducednominalsize{10pt}
 1914 \setfont\reducedrm\rmshape{10}{1000}{OT1}
 1915 \setfont\reducedtt\ttshape{10}{1000}{OT1TT}
 1916 \setfont\reducedbf\bfshape{10}{1000}{OT1}
 1917 \setfont\reducedit\itshape{10}{1000}{OT1IT}
 1918 \setfont\reducedsl\slshape{10}{1000}{OT1}
 1919 \setfont\reducedsf\sfshape{10}{1000}{OT1}
 1920 \setfont\reducedsc\scshape{10}{1000}{OT1}
 1921 \setfont\reducedttsl\ttslshape{10}{1000}{OT1TT}
 1922 \font\reducedi=cmmi10
 1923 \font\reducedsy=cmsy10
 1924 \def\reducedecsize{1000}
 1925 
 1926 \textleading = 13.2pt % line spacing for 11pt CM
 1927 \textfonts            % reset the current fonts
 1928 \rm
 1929 } % end of 11pt text font size definitions, \definetextfontsizexi
 1930 
 1931 
 1932 % Definitions to make the main text be 10pt Computer Modern, with
 1933 % section, chapter, etc., sizes following suit.  This is for the GNU
 1934 % Press printing of the Emacs 22 manual.  Maybe other manuals in the
 1935 % future.  Used with @smallbook, which sets the leading to 12pt.
 1936 %
 1937 \def\definetextfontsizex{%
 1938 % Text fonts (10pt).
 1939 \def\textnominalsize{10pt}
 1940 \edef\mainmagstep{1000}
 1941 \setfont\textrm\rmshape{10}{\mainmagstep}{OT1}
 1942 \setfont\texttt\ttshape{10}{\mainmagstep}{OT1TT}
 1943 \setfont\textbf\bfshape{10}{\mainmagstep}{OT1}
 1944 \setfont\textit\itshape{10}{\mainmagstep}{OT1IT}
 1945 \setfont\textsl\slshape{10}{\mainmagstep}{OT1}
 1946 \setfont\textsf\sfshape{10}{\mainmagstep}{OT1}
 1947 \setfont\textsc\scshape{10}{\mainmagstep}{OT1}
 1948 \setfont\textttsl\ttslshape{10}{\mainmagstep}{OT1TT}
 1949 \font\texti=cmmi10 scaled \mainmagstep
 1950 \font\textsy=cmsy10 scaled \mainmagstep
 1951 \def\textecsize{1000}
 1952 
 1953 % A few fonts for @defun names and args.
 1954 \setfont\defbf\bfshape{10}{\magstephalf}{OT1}
 1955 \setfont\deftt\ttshape{10}{\magstephalf}{OT1TT}
 1956 \setfont\defttsl\ttslshape{10}{\magstephalf}{OT1TT}
 1957 \def\df{\let\tentt=\deftt \let\tenbf = \defbf \let\tenttsl=\defttsl \bf}
 1958 
 1959 % Fonts for indices, footnotes, small examples (9pt).
 1960 \def\smallnominalsize{9pt}
 1961 \setfont\smallrm\rmshape{9}{1000}{OT1}
 1962 \setfont\smalltt\ttshape{9}{1000}{OT1TT}
 1963 \setfont\smallbf\bfshape{10}{900}{OT1}
 1964 \setfont\smallit\itshape{9}{1000}{OT1IT}
 1965 \setfont\smallsl\slshape{9}{1000}{OT1}
 1966 \setfont\smallsf\sfshape{9}{1000}{OT1}
 1967 \setfont\smallsc\scshape{10}{900}{OT1}
 1968 \setfont\smallttsl\ttslshape{10}{900}{OT1TT}
 1969 \font\smalli=cmmi9
 1970 \font\smallsy=cmsy9
 1971 \def\smallecsize{0900}
 1972 
 1973 % Fonts for small examples (8pt).
 1974 \def\smallernominalsize{8pt}
 1975 \setfont\smallerrm\rmshape{8}{1000}{OT1}
 1976 \setfont\smallertt\ttshape{8}{1000}{OT1TT}
 1977 \setfont\smallerbf\bfshape{10}{800}{OT1}
 1978 \setfont\smallerit\itshape{8}{1000}{OT1IT}
 1979 \setfont\smallersl\slshape{8}{1000}{OT1}
 1980 \setfont\smallersf\sfshape{8}{1000}{OT1}
 1981 \setfont\smallersc\scshape{10}{800}{OT1}
 1982 \setfont\smallerttsl\ttslshape{10}{800}{OT1TT}
 1983 \font\smalleri=cmmi8
 1984 \font\smallersy=cmsy8
 1985 \def\smallerecsize{0800}
 1986 
 1987 % Fonts for title page (20.4pt):
 1988 \def\titlenominalsize{20pt}
 1989 \setfont\titlerm\rmbshape{12}{\magstep3}{OT1}
 1990 \setfont\titleit\itbshape{10}{\magstep4}{OT1IT}
 1991 \setfont\titlesl\slbshape{10}{\magstep4}{OT1}
 1992 \setfont\titlett\ttbshape{12}{\magstep3}{OT1TT}
 1993 \setfont\titlettsl\ttslshape{10}{\magstep4}{OT1TT}
 1994 \setfont\titlesf\sfbshape{17}{\magstep1}{OT1}
 1995 \let\titlebf=\titlerm
 1996 \setfont\titlesc\scbshape{10}{\magstep4}{OT1}
 1997 \font\titlei=cmmi12 scaled \magstep3
 1998 \font\titlesy=cmsy10 scaled \magstep4
 1999 \def\titleecsize{2074}
 2000 
 2001 % Chapter fonts (14.4pt).
 2002 \def\chapnominalsize{14pt}
 2003 \setfont\chaprm\rmbshape{12}{\magstep1}{OT1}
 2004 \setfont\chapit\itbshape{10}{\magstep2}{OT1IT}
 2005 \setfont\chapsl\slbshape{10}{\magstep2}{OT1}
 2006 \setfont\chaptt\ttbshape{12}{\magstep1}{OT1TT}
 2007 \setfont\chapttsl\ttslshape{10}{\magstep2}{OT1TT}
 2008 \setfont\chapsf\sfbshape{12}{\magstep1}{OT1}
 2009 \let\chapbf\chaprm
 2010 \setfont\chapsc\scbshape{10}{\magstep2}{OT1}
 2011 \font\chapi=cmmi12 scaled \magstep1
 2012 \font\chapsy=cmsy10 scaled \magstep2
 2013 \def\chapecsize{1440}
 2014 
 2015 % Section fonts (12pt).
 2016 \def\secnominalsize{12pt}
 2017 \setfont\secrm\rmbshape{12}{1000}{OT1}
 2018 \setfont\secit\itbshape{10}{\magstep1}{OT1IT}
 2019 \setfont\secsl\slbshape{10}{\magstep1}{OT1}
 2020 \setfont\sectt\ttbshape{12}{1000}{OT1TT}
 2021 \setfont\secttsl\ttslshape{10}{\magstep1}{OT1TT}
 2022 \setfont\secsf\sfbshape{12}{1000}{OT1}
 2023 \let\secbf\secrm
 2024 \setfont\secsc\scbshape{10}{\magstep1}{OT1}
 2025 \font\seci=cmmi12
 2026 \font\secsy=cmsy10 scaled \magstep1
 2027 \def\sececsize{1200}
 2028 
 2029 % Subsection fonts (10pt).
 2030 \def\ssecnominalsize{10pt}
 2031 \setfont\ssecrm\rmbshape{10}{1000}{OT1}
 2032 \setfont\ssecit\itbshape{10}{1000}{OT1IT}
 2033 \setfont\ssecsl\slbshape{10}{1000}{OT1}
 2034 \setfont\ssectt\ttbshape{10}{1000}{OT1TT}
 2035 \setfont\ssecttsl\ttslshape{10}{1000}{OT1TT}
 2036 \setfont\ssecsf\sfbshape{10}{1000}{OT1}
 2037 \let\ssecbf\ssecrm
 2038 \setfont\ssecsc\scbshape{10}{1000}{OT1}
 2039 \font\sseci=cmmi10
 2040 \font\ssecsy=cmsy10
 2041 \def\ssececsize{1000}
 2042 
 2043 % Reduced fonts for @acro in text (9pt).
 2044 \def\reducednominalsize{9pt}
 2045 \setfont\reducedrm\rmshape{9}{1000}{OT1}
 2046 \setfont\reducedtt\ttshape{9}{1000}{OT1TT}
 2047 \setfont\reducedbf\bfshape{10}{900}{OT1}
 2048 \setfont\reducedit\itshape{9}{1000}{OT1IT}
 2049 \setfont\reducedsl\slshape{9}{1000}{OT1}
 2050 \setfont\reducedsf\sfshape{9}{1000}{OT1}
 2051 \setfont\reducedsc\scshape{10}{900}{OT1}
 2052 \setfont\reducedttsl\ttslshape{10}{900}{OT1TT}
 2053 \font\reducedi=cmmi9
 2054 \font\reducedsy=cmsy9
 2055 \def\reducedecsize{0900}
 2056 
 2057 \divide\parskip by 2  % reduce space between paragraphs
 2058 \textleading = 12pt   % line spacing for 10pt CM
 2059 \textfonts            % reset the current fonts
 2060 \rm
 2061 } % end of 10pt text font size definitions, \definetextfontsizex
 2062 
 2063 
 2064 % We provide the user-level command
 2065 %   @fonttextsize 10
 2066 % (or 11) to redefine the text font size.  pt is assumed.
 2067 %
 2068 \def\xiword{11}
 2069 \def\xword{10}
 2070 \def\xwordpt{10pt}
 2071 %
 2072 \parseargdef\fonttextsize{%
 2073   \def\textsizearg{#1}%
 2074   %\wlog{doing @fonttextsize \textsizearg}%
 2075   %
 2076   % Set \globaldefs so that documents can use this inside @tex, since
 2077   % makeinfo 4.8 does not support it, but we need it nonetheless.
 2078   %
 2079  \begingroup \globaldefs=1
 2080   \ifx\textsizearg\xword \definetextfontsizex
 2081   \else \ifx\textsizearg\xiword \definetextfontsizexi
 2082   \else
 2083     \errhelp=\EMsimple
 2084     \errmessage{@fonttextsize only supports `10' or `11', not `\textsizearg'}
 2085   \fi\fi
 2086  \endgroup
 2087 }
 2088 
 2089 
 2090 % In order for the font changes to affect most math symbols and letters,
 2091 % we have to define the \textfont of the standard families.  Since
 2092 % texinfo doesn't allow for producing subscripts and superscripts except
 2093 % in the main text, we don't bother to reset \scriptfont and
 2094 % \scriptscriptfont (which would also require loading a lot more fonts).
 2095 %
 2096 \def\resetmathfonts{%
 2097   \textfont0=\tenrm \textfont1=\teni \textfont2=\tensy
 2098   \textfont\itfam=\tenit \textfont\slfam=\tensl \textfont\bffam=\tenbf
 2099   \textfont\ttfam=\tentt \textfont\sffam=\tensf
 2100 }
 2101 
 2102 % The font-changing commands redefine the meanings of \tenSTYLE, instead
 2103 % of just \STYLE.  We do this because \STYLE needs to also set the
 2104 % current \fam for math mode.  Our \STYLE (e.g., \rm) commands hardwire
 2105 % \tenSTYLE to set the current font.
 2106 %
 2107 % Each font-changing command also sets the names \lsize (one size lower)
 2108 % and \lllsize (three sizes lower).  These relative commands are used in
 2109 % the LaTeX logo and acronyms.
 2110 %
 2111 % This all needs generalizing, badly.
 2112 %
 2113 \def\textfonts{%
 2114   \let\tenrm=\textrm \let\tenit=\textit \let\tensl=\textsl
 2115   \let\tenbf=\textbf \let\tentt=\texttt \let\smallcaps=\textsc
 2116   \let\tensf=\textsf \let\teni=\texti \let\tensy=\textsy
 2117   \let\tenttsl=\textttsl
 2118   \def\curfontsize{text}%
 2119   \def\lsize{reduced}\def\lllsize{smaller}%
 2120   \resetmathfonts \setleading{\textleading}}
 2121 \def\titlefonts{%
 2122   \let\tenrm=\titlerm \let\tenit=\titleit \let\tensl=\titlesl
 2123   \let\tenbf=\titlebf \let\tentt=\titlett \let\smallcaps=\titlesc
 2124   \let\tensf=\titlesf \let\teni=\titlei \let\tensy=\titlesy
 2125   \let\tenttsl=\titlettsl
 2126   \def\curfontsize{title}%
 2127   \def\lsize{chap}\def\lllsize{subsec}%
 2128   \resetmathfonts \setleading{27pt}}
 2129 \def\titlefont#1{{\titlefonts\rmisbold #1}}
 2130 \def\chapfonts{%
 2131   \let\tenrm=\chaprm \let\tenit=\chapit \let\tensl=\chapsl
 2132   \let\tenbf=\chapbf \let\tentt=\chaptt \let\smallcaps=\chapsc
 2133   \let\tensf=\chapsf \let\teni=\chapi \let\tensy=\chapsy
 2134   \let\tenttsl=\chapttsl
 2135   \def\curfontsize{chap}%
 2136   \def\lsize{sec}\def\lllsize{text}%
 2137   \resetmathfonts \setleading{19pt}}
 2138 \def\secfonts{%
 2139   \let\tenrm=\secrm \let\tenit=\secit \let\tensl=\secsl
 2140   \let\tenbf=\secbf \let\tentt=\sectt \let\smallcaps=\secsc
 2141   \let\tensf=\secsf \let\teni=\seci \let\tensy=\secsy
 2142   \let\tenttsl=\secttsl
 2143   \def\curfontsize{sec}%
 2144   \def\lsize{subsec}\def\lllsize{reduced}%
 2145   \resetmathfonts \setleading{16pt}}
 2146 \def\subsecfonts{%
 2147   \let\tenrm=\ssecrm \let\tenit=\ssecit \let\tensl=\ssecsl
 2148   \let\tenbf=\ssecbf \let\tentt=\ssectt \let\smallcaps=\ssecsc
 2149   \let\tensf=\ssecsf \let\teni=\sseci \let\tensy=\ssecsy
 2150   \let\tenttsl=\ssecttsl
 2151   \def\curfontsize{ssec}%
 2152   \def\lsize{text}\def\lllsize{small}%
 2153   \resetmathfonts \setleading{15pt}}
 2154 \let\subsubsecfonts = \subsecfonts
 2155 \def\reducedfonts{%
 2156   \let\tenrm=\reducedrm \let\tenit=\reducedit \let\tensl=\reducedsl
 2157   \let\tenbf=\reducedbf \let\tentt=\reducedtt \let\reducedcaps=\reducedsc
 2158   \let\tensf=\reducedsf \let\teni=\reducedi \let\tensy=\reducedsy
 2159   \let\tenttsl=\reducedttsl
 2160   \def\curfontsize{reduced}%
 2161   \def\lsize{small}\def\lllsize{smaller}%
 2162   \resetmathfonts \setleading{10.5pt}}
 2163 \def\smallfonts{%
 2164   \let\tenrm=\smallrm \let\tenit=\smallit \let\tensl=\smallsl
 2165   \let\tenbf=\smallbf \let\tentt=\smalltt \let\smallcaps=\smallsc
 2166   \let\tensf=\smallsf \let\teni=\smalli \let\tensy=\smallsy
 2167   \let\tenttsl=\smallttsl
 2168   \def\curfontsize{small}%
 2169   \def\lsize{smaller}\def\lllsize{smaller}%
 2170   \resetmathfonts \setleading{10.5pt}}
 2171 \def\smallerfonts{%
 2172   \let\tenrm=\smallerrm \let\tenit=\smallerit \let\tensl=\smallersl
 2173   \let\tenbf=\smallerbf \let\tentt=\smallertt \let\smallcaps=\smallersc
 2174   \let\tensf=\smallersf \let\teni=\smalleri \let\tensy=\smallersy
 2175   \let\tenttsl=\smallerttsl
 2176   \def\curfontsize{smaller}%
 2177   \def\lsize{smaller}\def\lllsize{smaller}%
 2178   \resetmathfonts \setleading{9.5pt}}
 2179 
 2180 % Fonts for short table of contents.
 2181 \setfont\shortcontrm\rmshape{12}{1000}{OT1}
 2182 \setfont\shortcontbf\bfshape{10}{\magstep1}{OT1}  % no cmb12
 2183 \setfont\shortcontsl\slshape{12}{1000}{OT1}
 2184 \setfont\shortconttt\ttshape{12}{1000}{OT1TT}
 2185 
 2186 % Define these just so they can be easily changed for other fonts.
 2187 \def\angleleft{$\langle$}
 2188 \def\angleright{$\rangle$}
 2189 
 2190 % Set the fonts to use with the @small... environments.
 2191 \let\smallexamplefonts = \smallfonts
 2192 
 2193 % About \smallexamplefonts.  If we use \smallfonts (9pt), @smallexample
 2194 % can fit this many characters:
 2195 %   8.5x11=86   smallbook=72  a4=90  a5=69
 2196 % If we use \scriptfonts (8pt), then we can fit this many characters:
 2197 %   8.5x11=90+  smallbook=80  a4=90+  a5=77
 2198 % For me, subjectively, the few extra characters that fit aren't worth
 2199 % the additional smallness of 8pt.  So I'm making the default 9pt.
 2200 %
 2201 % By the way, for comparison, here's what fits with @example (10pt):
 2202 %   8.5x11=71  smallbook=60  a4=75  a5=58
 2203 % --karl, 24jan03.
 2204 
 2205 % Set up the default fonts, so we can use them for creating boxes.
 2206 %
 2207 \definetextfontsizexi
 2208 
 2209 
 2210 \message{markup,}
 2211 
 2212 % Check if we are currently using a typewriter font.  Since all the
 2213 % Computer Modern typewriter fonts have zero interword stretch (and
 2214 % shrink), and it is reasonable to expect all typewriter fonts to have
 2215 % this property, we can check that font parameter.
 2216 %
 2217 \def\ifmonospace{\ifdim\fontdimen3\font=0pt }
 2218 
 2219 % Markup style infrastructure.  \defmarkupstylesetup\INITMACRO will
 2220 % define and register \INITMACRO to be called on markup style changes.
 2221 % \INITMACRO can check \currentmarkupstyle for the innermost
 2222 % style and the set of \ifmarkupSTYLE switches for all styles
 2223 % currently in effect.
 2224 \newif\ifmarkupvar
 2225 \newif\ifmarkupsamp
 2226 \newif\ifmarkupkey
 2227 %\newif\ifmarkupfile % @file == @samp.
 2228 %\newif\ifmarkupoption % @option == @samp.
 2229 \newif\ifmarkupcode
 2230 \newif\ifmarkupkbd
 2231 %\newif\ifmarkupenv % @env == @code.
 2232 %\newif\ifmarkupcommand % @command == @code.
 2233 \newif\ifmarkuptex % @tex (and part of @math, for now).
 2234 \newif\ifmarkupexample
 2235 \newif\ifmarkupverb
 2236 \newif\ifmarkupverbatim
 2237 
 2238 \let\currentmarkupstyle\empty
 2239 
 2240 \def\setupmarkupstyle#1{%
 2241   \csname markup#1true\endcsname
 2242   \def\currentmarkupstyle{#1}%
 2243   \markupstylesetup
 2244 }
 2245 
 2246 \let\markupstylesetup\empty
 2247 
 2248 \def\defmarkupstylesetup#1{%
 2249   \expandafter\def\expandafter\markupstylesetup
 2250     \expandafter{\markupstylesetup #1}%
 2251   \def#1%
 2252 }
 2253 
 2254 % Markup style setup for left and right quotes.
 2255 \defmarkupstylesetup\markupsetuplq{%
 2256   \expandafter\let\expandafter \temp
 2257     \csname markupsetuplq\currentmarkupstyle\endcsname
 2258   \ifx\temp\relax \markupsetuplqdefault \else \temp \fi
 2259 }
 2260 
 2261 \defmarkupstylesetup\markupsetuprq{%
 2262   \expandafter\let\expandafter \temp
 2263     \csname markupsetuprq\currentmarkupstyle\endcsname
 2264   \ifx\temp\relax \markupsetuprqdefault \else \temp \fi
 2265 }
 2266 
 2267 {
 2268 \catcode`\'=\active
 2269 \catcode`\`=\active
 2270 
 2271 \gdef\markupsetuplqdefault{\let`\lq}
 2272 \gdef\markupsetuprqdefault{\let'\rq}
 2273 
 2274 \gdef\markupsetcodequoteleft{\let`\codequoteleft}
 2275 \gdef\markupsetcodequoteright{\let'\codequoteright}
 2276 }
 2277 
 2278 \let\markupsetuplqcode \markupsetcodequoteleft
 2279 \let\markupsetuprqcode \markupsetcodequoteright
 2280 %
 2281 \let\markupsetuplqexample \markupsetcodequoteleft
 2282 \let\markupsetuprqexample \markupsetcodequoteright
 2283 %
 2284 \let\markupsetuplqkbd     \markupsetcodequoteleft
 2285 \let\markupsetuprqkbd     \markupsetcodequoteright
 2286 %
 2287 \let\markupsetuplqsamp \markupsetcodequoteleft
 2288 \let\markupsetuprqsamp \markupsetcodequoteright
 2289 %
 2290 \let\markupsetuplqverb \markupsetcodequoteleft
 2291 \let\markupsetuprqverb \markupsetcodequoteright
 2292 %
 2293 \let\markupsetuplqverbatim \markupsetcodequoteleft
 2294 \let\markupsetuprqverbatim \markupsetcodequoteright
 2295 
 2296 % Allow an option to not use regular directed right quote/apostrophe
 2297 % (char 0x27), but instead the undirected quote from cmtt (char 0x0d).
 2298 % The undirected quote is ugly, so don't make it the default, but it
 2299 % works for pasting with more pdf viewers (at least evince), the
 2300 % lilypond developers report.  xpdf does work with the regular 0x27.
 2301 %
 2302 \def\codequoteright{%
 2303   \expandafter\ifx\csname SETtxicodequoteundirected\endcsname\relax
 2304     \expandafter\ifx\csname SETcodequoteundirected\endcsname\relax
 2305       '%
 2306     \else \char'15 \fi
 2307   \else \char'15 \fi
 2308 }
 2309 %
 2310 % and a similar option for the left quote char vs. a grave accent.
 2311 % Modern fonts display ASCII 0x60 as a grave accent, so some people like
 2312 % the code environments to do likewise.
 2313 %
 2314 \def\codequoteleft{%
 2315   \expandafter\ifx\csname SETtxicodequotebacktick\endcsname\relax
 2316     \expandafter\ifx\csname SETcodequotebacktick\endcsname\relax
 2317       % [Knuth] pp. 380,381,391
 2318       % \relax disables Spanish ligatures ?` and !` of \tt font.
 2319       \relax`%
 2320     \else \char'22 \fi
 2321   \else \char'22 \fi
 2322 }
 2323 
 2324 % Commands to set the quote options.
 2325 % 
 2326 \parseargdef\codequoteundirected{%
 2327   \def\temp{#1}%
 2328   \ifx\temp\onword
 2329     \expandafter\let\csname SETtxicodequoteundirected\endcsname
 2330       = t%
 2331   \else\ifx\temp\offword
 2332     \expandafter\let\csname SETtxicodequoteundirected\endcsname
 2333       = \relax
 2334   \else
 2335     \errhelp = \EMsimple
 2336     \errmessage{Unknown @codequoteundirected value `\temp', must be on|off}%
 2337   \fi\fi
 2338 }
 2339 %
 2340 \parseargdef\codequotebacktick{%
 2341   \def\temp{#1}%
 2342   \ifx\temp\onword
 2343     \expandafter\let\csname SETtxicodequotebacktick\endcsname
 2344       = t%
 2345   \else\ifx\temp\offword
 2346     \expandafter\let\csname SETtxicodequotebacktick\endcsname
 2347       = \relax
 2348   \else
 2349     \errhelp = \EMsimple
 2350     \errmessage{Unknown @codequotebacktick value `\temp', must be on|off}%
 2351   \fi\fi
 2352 }
 2353 
 2354 % [Knuth] pp. 380,381,391, disable Spanish ligatures ?` and !` of \tt font.
 2355 \def\noligaturesquoteleft{\relax\lq}
 2356 
 2357 % Count depth in font-changes, for error checks
 2358 \newcount\fontdepth \fontdepth=0
 2359 
 2360 % Font commands.
 2361 
 2362 % #1 is the font command (\sl or \it), #2 is the text to slant.
 2363 % If we are in a monospaced environment, however, 1) always use \ttsl,
 2364 % and 2) do not add an italic correction.
 2365 \def\dosmartslant#1#2{%
 2366   \ifusingtt 
 2367     {{\ttsl #2}\let\next=\relax}%
 2368     {\def\next{{#1#2}\futurelet\next\smartitaliccorrection}}%
 2369   \next
 2370 }
 2371 \def\smartslanted{\dosmartslant\sl}
 2372 \def\smartitalic{\dosmartslant\it}
 2373 
 2374 % Output an italic correction unless \next (presumed to be the following
 2375 % character) is such as not to need one.
 2376 \def\smartitaliccorrection{%
 2377   \ifx\next,%
 2378   \else\ifx\next-%
 2379   \else\ifx\next.%
 2380   \else\ptexslash
 2381   \fi\fi\fi
 2382   \aftersmartic
 2383 }
 2384 
 2385 % Unconditional use \ttsl, and no ic.  @var is set to this for defuns.
 2386 \def\ttslanted#1{{\ttsl #1}}
 2387 
 2388 % @cite is like \smartslanted except unconditionally use \sl.  We never want
 2389 % ttsl for book titles, do we?
 2390 \def\cite#1{{\sl #1}\futurelet\next\smartitaliccorrection}
 2391 
 2392 \def\aftersmartic{}
 2393 \def\var#1{%
 2394   \let\saveaftersmartic = \aftersmartic
 2395   \def\aftersmartic{\null\let\aftersmartic=\saveaftersmartic}%
 2396   \smartslanted{#1}%
 2397 }
 2398 
 2399 \let\i=\smartitalic
 2400 \let\slanted=\smartslanted
 2401 \let\dfn=\smartslanted
 2402 \let\emph=\smartitalic
 2403 
 2404 % Explicit font changes: @r, @sc, undocumented @ii.
 2405 \def\r#1{{\rm #1}}              % roman font
 2406 \def\sc#1{{\smallcaps#1}}       % smallcaps font
 2407 \def\ii#1{{\it #1}}             % italic font
 2408 
 2409 % @b, explicit bold.  Also @strong.
 2410 \def\b#1{{\bf #1}}
 2411 \let\strong=\b
 2412 
 2413 % @sansserif, explicit sans.
 2414 \def\sansserif#1{{\sf #1}}
 2415 
 2416 % We can't just use \exhyphenpenalty, because that only has effect at
 2417 % the end of a paragraph.  Restore normal hyphenation at the end of the
 2418 % group within which \nohyphenation is presumably called.
 2419 %
 2420 \def\nohyphenation{\hyphenchar\font = -1  \aftergroup\restorehyphenation}
 2421 \def\restorehyphenation{\hyphenchar\font = `- }
 2422 
 2423 % Set sfcode to normal for the chars that usually have another value.
 2424 % Can't use plain's \frenchspacing because it uses the `\x notation, and
 2425 % sometimes \x has an active definition that messes things up.
 2426 %
 2427 \catcode`@=11
 2428   \def\plainfrenchspacing{%
 2429     \sfcode\dotChar  =\@m \sfcode\questChar=\@m \sfcode\exclamChar=\@m
 2430     \sfcode\colonChar=\@m \sfcode\semiChar =\@m \sfcode\commaChar =\@m
 2431     \def\endofsentencespacefactor{1000}% for @. and friends
 2432   }
 2433   \def\plainnonfrenchspacing{%
 2434     \sfcode`\.3000\sfcode`\?3000\sfcode`\!3000
 2435     \sfcode`\:2000\sfcode`\;1500\sfcode`\,1250
 2436     \def\endofsentencespacefactor{3000}% for @. and friends
 2437   }
 2438 \catcode`@=\other
 2439 \def\endofsentencespacefactor{3000}% default
 2440 
 2441 % @t, explicit typewriter.
 2442 \def\t#1{%
 2443   {\tt \rawbackslash \plainfrenchspacing #1}%
 2444   \null
 2445 }
 2446 
 2447 % @samp.
 2448 \def\samp#1{{\setupmarkupstyle{samp}\lq\tclose{#1}\rq\null}}
 2449 
 2450 % @indicateurl is \samp, that is, with quotes.
 2451 \let\indicateurl=\samp
 2452 
 2453 % @code (and similar) prints in typewriter, but with spaces the same
 2454 % size as normal in the surrounding text, without hyphenation, etc.
 2455 % This is a subroutine for that.
 2456 \def\tclose#1{%
 2457   {%
 2458     % Change normal interword space to be same as for the current font.
 2459     \spaceskip = \fontdimen2\font
 2460     %
 2461     % Switch to typewriter.
 2462     \tt
 2463     %
 2464     % But `\ ' produces the large typewriter interword space.
 2465     \def\ {{\spaceskip = 0pt{} }}%
 2466     %
 2467     % Turn off hyphenation.
 2468     \nohyphenation
 2469     %
 2470     \rawbackslash
 2471     \plainfrenchspacing
 2472     #1%
 2473   }%
 2474   \null % reset spacefactor to 1000
 2475 }
 2476 
 2477 % We *must* turn on hyphenation at `-' and `_' in @code.
 2478 % Otherwise, it is too hard to avoid overfull hboxes
 2479 % in the Emacs manual, the Library manual, etc.
 2480 %
 2481 % Unfortunately, TeX uses one parameter (\hyphenchar) to control
 2482 % both hyphenation at - and hyphenation within words.
 2483 % We must therefore turn them both off (\tclose does that)
 2484 % and arrange explicitly to hyphenate at a dash.
 2485 %  -- rms.
 2486 {
 2487   \catcode`\-=\active \catcode`\_=\active
 2488   \catcode`\'=\active \catcode`\`=\active
 2489   \global\let'=\rq \global\let`=\lq  % default definitions
 2490   %
 2491   \global\def\code{\begingroup
 2492     \setupmarkupstyle{code}%
 2493     % The following should really be moved into \setupmarkupstyle handlers.
 2494     \catcode\dashChar=\active  \catcode\underChar=\active
 2495     \ifallowcodebreaks
 2496      \let-\codedash
 2497      \let_\codeunder
 2498     \else
 2499      \let-\normaldash
 2500      \let_\realunder
 2501     \fi
 2502     \codex
 2503   }
 2504 }
 2505 
 2506 \def\codex #1{\tclose{#1}\endgroup}
 2507 
 2508 \def\normaldash{-}
 2509 \def\codedash{-\discretionary{}{}{}}
 2510 \def\codeunder{%
 2511   % this is all so @math{@code{var_name}+1} can work.  In math mode, _
 2512   % is "active" (mathcode"8000) and \normalunderscore (or \char95, etc.)
 2513   % will therefore expand the active definition of _, which is us
 2514   % (inside @code that is), therefore an endless loop.
 2515   \ifusingtt{\ifmmode
 2516                \mathchar"075F % class 0=ordinary, family 7=ttfam, pos 0x5F=_.
 2517              \else\normalunderscore \fi
 2518              \discretionary{}{}{}}%
 2519             {\_}%
 2520 }
 2521 
 2522 % An additional complication: the above will allow breaks after, e.g.,
 2523 % each of the four underscores in __typeof__.  This is bad.
 2524 % @allowcodebreaks provides a document-level way to turn breaking at -
 2525 % and _ on and off.
 2526 %
 2527 \newif\ifallowcodebreaks  \allowcodebreakstrue
 2528 
 2529 \def\keywordtrue{true}
 2530 \def\keywordfalse{false}
 2531 
 2532 \parseargdef\allowcodebreaks{%
 2533   \def\txiarg{#1}%
 2534   \ifx\txiarg\keywordtrue
 2535     \allowcodebreakstrue
 2536   \else\ifx\txiarg\keywordfalse
 2537     \allowcodebreaksfalse
 2538   \else
 2539     \errhelp = \EMsimple
 2540     \errmessage{Unknown @allowcodebreaks option `\txiarg', must be true|false}%
 2541   \fi\fi
 2542 }
 2543 
 2544 % For @command, @env, @file, @option quotes seem unnecessary,
 2545 % so use \code rather than \samp.
 2546 \let\command=\code
 2547 \let\env=\code
 2548 \let\file=\code
 2549 \let\option=\code
 2550 
 2551 % @uref (abbreviation for `urlref') takes an optional (comma-separated)
 2552 % second argument specifying the text to display and an optional third
 2553 % arg as text to display instead of (rather than in addition to) the url
 2554 % itself.  First (mandatory) arg is the url.
 2555 % (This \urefnobreak definition isn't used now, leaving it for a while
 2556 % for comparison.)
 2557 \def\urefnobreak#1{\dourefnobreak #1,,,\finish}
 2558 \def\dourefnobreak#1,#2,#3,#4\finish{\begingroup
 2559   \unsepspaces
 2560   \pdfurl{#1}%
 2561   \setbox0 = \hbox{\ignorespaces #3}%
 2562   \ifdim\wd0 > 0pt
 2563     \unhbox0 % third arg given, show only that
 2564   \else
 2565     \setbox0 = \hbox{\ignorespaces #2}%
 2566     \ifdim\wd0 > 0pt
 2567       \ifpdf
 2568         \unhbox0             % PDF: 2nd arg given, show only it
 2569       \else
 2570         \unhbox0\ (\code{#1})% DVI: 2nd arg given, show both it and url
 2571       \fi
 2572     \else
 2573       \code{#1}% only url given, so show it
 2574     \fi
 2575   \fi
 2576   \endlink
 2577 \endgroup}
 2578 
 2579 % This \urefbreak definition is the active one.
 2580 \def\urefbreak{\begingroup \urefcatcodes \dourefbreak}
 2581 \let\uref=\urefbreak
 2582 \def\dourefbreak#1{\urefbreakfinish #1,,,\finish}
 2583 \def\urefbreakfinish#1,#2,#3,#4\finish{% doesn't work in @example
 2584   \unsepspaces
 2585   \pdfurl{#1}%
 2586   \setbox0 = \hbox{\ignorespaces #3}%
 2587   \ifdim\wd0 > 0pt
 2588     \unhbox0 % third arg given, show only that
 2589   \else
 2590     \setbox0 = \hbox{\ignorespaces #2}%
 2591     \ifdim\wd0 > 0pt
 2592       \ifpdf
 2593         \unhbox0             % PDF: 2nd arg given, show only it
 2594       \else
 2595         \unhbox0\ (\urefcode{#1})% DVI: 2nd arg given, show both it and url
 2596       \fi
 2597     \else
 2598       \urefcode{#1}% only url given, so show it
 2599     \fi
 2600   \fi
 2601   \endlink
 2602 \endgroup}
 2603 
 2604 % Allow line breaks around only a few characters (only).
 2605 \def\urefcatcodes{%
 2606   \catcode\ampChar=\active   \catcode\dotChar=\active
 2607   \catcode\hashChar=\active  \catcode\questChar=\active
 2608   \catcode\slashChar=\active
 2609 }
 2610 {
 2611   \urefcatcodes
 2612   %
 2613   \global\def\urefcode{\begingroup
 2614     \setupmarkupstyle{code}%
 2615     \urefcatcodes
 2616     \let&\urefcodeamp
 2617     \let.\urefcodedot
 2618     \let#\urefcodehash
 2619     \let?\urefcodequest
 2620     \let/\urefcodeslash
 2621     \codex
 2622   }
 2623   %
 2624   % By default, they are just regular characters.
 2625   \global\def&{\normalamp}
 2626   \global\def.{\normaldot}
 2627   \global\def#{\normalhash}
 2628   \global\def?{\normalquest}
 2629   \global\def/{\normalslash}
 2630 }
 2631 
 2632 % we put a little stretch before and after the breakable chars, to help
 2633 % line breaking of long url's.  The unequal skips make look better in
 2634 % cmtt at least, especially for dots.
 2635 \def\urefprestretch{\urefprebreak \hskip0pt plus.13em }
 2636 \def\urefpoststretch{\urefpostbreak \hskip0pt plus.1em }
 2637 %
 2638 \def\urefcodeamp{\urefprestretch \&\urefpoststretch}
 2639 \def\urefcodedot{\urefprestretch .\urefpoststretch}
 2640 \def\urefcodehash{\urefprestretch \#\urefpoststretch}
 2641 \def\urefcodequest{\urefprestretch ?\urefpoststretch}
 2642 \def\urefcodeslash{\futurelet\next\urefcodeslashfinish}
 2643 {
 2644   \catcode`\/=\active
 2645   \global\def\urefcodeslashfinish{%
 2646     \urefprestretch \slashChar
 2647     % Allow line break only after the final / in a sequence of
 2648     % slashes, to avoid line break between the slashes in http://.
 2649     \ifx\next/\else \urefpoststretch \fi
 2650   }
 2651 }
 2652 
 2653 % One more complication: by default we'll break after the special
 2654 % characters, but some people like to break before the special chars, so
 2655 % allow that.  Also allow no breaking at all, for manual control.
 2656 % 
 2657 \parseargdef\urefbreakstyle{%
 2658   \def\txiarg{#1}%
 2659   \ifx\txiarg\wordnone
 2660     \def\urefprebreak{\nobreak}\def\urefpostbreak{\nobreak}
 2661   \else\ifx\txiarg\wordbefore
 2662     \def\urefprebreak{\allowbreak}\def\urefpostbreak{\nobreak}
 2663   \else\ifx\txiarg\wordafter
 2664     \def\urefprebreak{\nobreak}\def\urefpostbreak{\allowbreak}
 2665   \else
 2666     \errhelp = \EMsimple
 2667     \errmessage{Unknown @urefbreakstyle setting `\txiarg'}%
 2668   \fi\fi\fi
 2669 }
 2670 \def\wordafter{after}
 2671 \def\wordbefore{before}
 2672 \def\wordnone{none}
 2673 
 2674 \urefbreakstyle after
 2675 
 2676 % @url synonym for @uref, since that's how everyone uses it.
 2677 %
 2678 \let\url=\uref
 2679 
 2680 % rms does not like angle brackets --karl, 17may97.
 2681 % So now @email is just like @uref, unless we are pdf.
 2682 %
 2683 %\def\email#1{\angleleft{\tt #1}\angleright}
 2684 \ifpdf
 2685   \def\email#1{\doemail#1,,\finish}
 2686   \def\doemail#1,#2,#3\finish{\begingroup
 2687     \unsepspaces
 2688     \pdfurl{mailto:#1}%
 2689     \setbox0 = \hbox{\ignorespaces #2}%
 2690     \ifdim\wd0>0pt\unhbox0\else\code{#1}\fi
 2691     \endlink
 2692   \endgroup}
 2693 \else
 2694   \let\email=\uref
 2695 \fi
 2696 
 2697 % @kbdinputstyle -- arg is `distinct' (@kbd uses slanted tty font always),
 2698 %   `example' (@kbd uses ttsl only inside of @example and friends),
 2699 %   or `code' (@kbd uses normal tty font always).
 2700 \parseargdef\kbdinputstyle{%
 2701   \def\txiarg{#1}%
 2702   \ifx\txiarg\worddistinct
 2703     \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\ttsl}%
 2704   \else\ifx\txiarg\wordexample
 2705     \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\tt}%
 2706   \else\ifx\txiarg\wordcode
 2707     \gdef\kbdexamplefont{\tt}\gdef\kbdfont{\tt}%
 2708   \else
 2709     \errhelp = \EMsimple
 2710     \errmessage{Unknown @kbdinputstyle setting `\txiarg'}%
 2711   \fi\fi\fi
 2712 }
 2713 \def\worddistinct{distinct}
 2714 \def\wordexample{example}
 2715 \def\wordcode{code}
 2716 
 2717 % Default is `distinct'.
 2718 \kbdinputstyle distinct
 2719 
 2720 % @kbd is like @code, except that if the argument is just one @key command,
 2721 % then @kbd has no effect.
 2722 \def\kbd#1{{\def\look{#1}\expandafter\kbdsub\look??\par}}
 2723 
 2724 \def\xkey{\key}
 2725 \def\kbdsub#1#2#3\par{%
 2726   \def\one{#1}\def\three{#3}\def\threex{??}%
 2727   \ifx\one\xkey\ifx\threex\three \key{#2}%
 2728   \else{\tclose{\kbdfont\setupmarkupstyle{kbd}\look}}\fi
 2729   \else{\tclose{\kbdfont\setupmarkupstyle{kbd}\look}}\fi
 2730 }
 2731 
 2732 % definition of @key that produces a lozenge.  Doesn't adjust to text size.
 2733 %\setfont\keyrm\rmshape{8}{1000}{OT1}
 2734 %\font\keysy=cmsy9
 2735 %\def\key#1{{\keyrm\textfont2=\keysy \leavevmode\hbox{%
 2736 %  \raise0.4pt\hbox{\angleleft}\kern-.08em\vtop{%
 2737 %    \vbox{\hrule\kern-0.4pt
 2738 %     \hbox{\raise0.4pt\hbox{\vphantom{\angleleft}}#1}}%
 2739 %    \kern-0.4pt\hrule}%
 2740 %  \kern-.06em\raise0.4pt\hbox{\angleright}}}}
 2741 
 2742 % definition of @key with no lozenge.  If the current font is already
 2743 % monospace, don't change it; that way, we respect @kbdinputstyle.  But
 2744 % if it isn't monospace, then use \tt.
 2745 %
 2746 \def\key#1{{\setupmarkupstyle{key}%
 2747   \nohyphenation
 2748   \ifmonospace\else\tt\fi
 2749   #1}\null}
 2750 
 2751 % @clicksequence{File @click{} Open ...}
 2752 \def\clicksequence#1{\begingroup #1\endgroup}
 2753 
 2754 % @clickstyle @arrow   (by default)
 2755 \parseargdef\clickstyle{\def\click{#1}}
 2756 \def\click{\arrow}
 2757 
 2758 % Typeset a dimension, e.g., `in' or `pt'.  The only reason for the
 2759 % argument is to make the input look right: @dmn{pt} instead of @dmn{}pt.
 2760 %
 2761 \def\dmn#1{\thinspace #1}
 2762 
 2763 % @l was never documented to mean ``switch to the Lisp font'',
 2764 % and it is not used as such in any manual I can find.  We need it for
 2765 % Polish suppressed-l.  --karl, 22sep96.
 2766 %\def\l#1{{\li #1}\null}
 2767 
 2768 % @acronym for "FBI", "NATO", and the like.
 2769 % We print this one point size smaller, since it's intended for
 2770 % all-uppercase.
 2771 %
 2772 \def\acronym#1{\doacronym #1,,\finish}
 2773 \def\doacronym#1,#2,#3\finish{%
 2774   {\selectfonts\lsize #1}%
 2775   \def\temp{#2}%
 2776   \ifx\temp\empty \else
 2777     \space ({\unsepspaces \ignorespaces \temp \unskip})%
 2778   \fi
 2779   \null % reset \spacefactor=1000
 2780 }
 2781 
 2782 % @abbr for "Comput. J." and the like.
 2783 % No font change, but don't do end-of-sentence spacing.
 2784 %
 2785 \def\abbr#1{\doabbr #1,,\finish}
 2786 \def\doabbr#1,#2,#3\finish{%
 2787   {\plainfrenchspacing #1}%
 2788   \def\temp{#2}%
 2789   \ifx\temp\empty \else
 2790     \space ({\unsepspaces \ignorespaces \temp \unskip})%
 2791   \fi
 2792   \null % reset \spacefactor=1000
 2793 }
 2794 
 2795 % @asis just yields its argument.  Used with @table, for example.
 2796 %
 2797 \def\asis#1{#1}
 2798 
 2799 % @math outputs its argument in math mode.
 2800 %
 2801 % One complication: _ usually means subscripts, but it could also mean
 2802 % an actual _ character, as in @math{@var{some_variable} + 1}.  So make
 2803 % _ active, and distinguish by seeing if the current family is \slfam,
 2804 % which is what @var uses.
 2805 {
 2806   \catcode`\_ = \active
 2807   \gdef\mathunderscore{%
 2808     \catcode`\_=\active
 2809     \def_{\ifnum\fam=\slfam \_\else\sb\fi}%
 2810   }
 2811 }
 2812 % Another complication: we want \\ (and @\) to output a math (or tt) \.
 2813 % FYI, plain.tex uses \\ as a temporary control sequence (for no
 2814 % particular reason), but this is not advertised and we don't care.
 2815 %
 2816 % The \mathchar is class=0=ordinary, family=7=ttfam, position=5C=\.
 2817 \def\mathbackslash{\ifnum\fam=\ttfam \mathchar"075C \else\backslash \fi}
 2818 %
 2819 \def\math{%
 2820   \tex
 2821   \mathunderscore
 2822   \let\\ = \mathbackslash
 2823   \mathactive
 2824   % make the texinfo accent commands work in math mode
 2825   \let\"=\ddot
 2826   \let\'=\acute
 2827   \let\==\bar
 2828   \let\^=\hat
 2829   \let\`=\grave
 2830   \let\u=\breve
 2831   \let\v=\check
 2832   \let\~=\tilde
 2833   \let\dotaccent=\dot
 2834   $\finishmath
 2835 }
 2836 \def\finishmath#1{#1$\endgroup}  % Close the group opened by \tex.
 2837 
 2838 % Some active characters (such as <) are spaced differently in math.
 2839 % We have to reset their definitions in case the @math was an argument
 2840 % to a command which sets the catcodes (such as @item or @section).
 2841 %
 2842 {
 2843   \catcode`^ = \active
 2844   \catcode`< = \active
 2845   \catcode`> = \active
 2846   \catcode`+ = \active
 2847   \catcode`' = \active
 2848   \gdef\mathactive{%
 2849     \let^ = \ptexhat
 2850     \let< = \ptexless
 2851     \let> = \ptexgtr
 2852     \let+ = \ptexplus
 2853     \let' = \ptexquoteright
 2854   }
 2855 }
 2856 
 2857 % ctrl is no longer a Texinfo command, but leave this definition for fun.
 2858 \def\ctrl #1{{\tt \rawbackslash \hat}#1}
 2859 
 2860 % @inlinefmt{FMTNAME,PROCESSED-TEXT} and @inlineraw{FMTNAME,RAW-TEXT}.
 2861 % Ignore unless FMTNAME == tex; then it is like @iftex and @tex,
 2862 % except specified as a normal braced arg, so no newlines to worry about.
 2863 % 
 2864 \def\outfmtnametex{tex}
 2865 %
 2866 \long\def\inlinefmt#1{\doinlinefmt #1,\finish}
 2867 \long\def\doinlinefmt#1,#2,\finish{%
 2868   \def\inlinefmtname{#1}%
 2869   \ifx\inlinefmtname\outfmtnametex \ignorespaces #2\fi
 2870 }
 2871 % For raw, must switch into @tex before parsing the argument, to avoid
 2872 % setting catcodes prematurely.  Doing it this way means that, for
 2873 % example, @inlineraw{html, foo{bar} gets a parse error instead of being
 2874 % ignored.  But this isn't important because if people want a literal
 2875 % *right* brace they would have to use a command anyway, so they may as
 2876 % well use a command to get a left brace too.  We could re-use the
 2877 % delimiter character idea from \verb, but it seems like overkill.
 2878 % 
 2879 \long\def\inlineraw{\tex \doinlineraw}
 2880 \long\def\doinlineraw#1{\doinlinerawtwo #1,\finish}
 2881 \def\doinlinerawtwo#1,#2,\finish{%
 2882   \def\inlinerawname{#1}%
 2883   \ifx\inlinerawname\outfmtnametex \ignorespaces #2\fi
 2884   \endgroup % close group opened by \tex.
 2885 }
 2886 
 2887 
 2888 \message{glyphs,}
 2889 % and logos.
 2890 
 2891 % @@ prints an @, as does @atchar{}.
 2892 \def\@{\char64 }
 2893 \let\atchar=\@
 2894 
 2895 % @{ @} @lbracechar{} @rbracechar{} all generate brace characters.
 2896 % Unless we're in typewriter, use \ecfont because the CM text fonts do
 2897 % not have braces, and we don't want to switch into math.
 2898 \def\mylbrace{{\ifmonospace\else\ecfont\fi \char123}}
 2899 \def\myrbrace{{\ifmonospace\else\ecfont\fi \char125}}
 2900 \let\{=\mylbrace \let\lbracechar=\{
 2901 \let\}=\myrbrace \let\rbracechar=\}
 2902 \begingroup
 2903   % Definitions to produce \{ and \} commands for indices,
 2904   % and @{ and @} for the aux/toc files.
 2905   \catcode`\{ = \other \catcode`\} = \other
 2906   \catcode`\[ = 1 \catcode`\] = 2
 2907   \catcode`\! = 0 \catcode`\\ = \other
 2908   !gdef!lbracecmd[\{]%
 2909   !gdef!rbracecmd[\}]%
 2910   !gdef!lbraceatcmd[@{]%
 2911   !gdef!rbraceatcmd[@}]%
 2912 !endgroup
 2913 
 2914 % @comma{} to avoid , parsing problems.
 2915 \let\comma = ,
 2916 
 2917 % Accents: @, @dotaccent @ringaccent @ubaraccent @udotaccent
 2918 % Others are defined by plain TeX: @` @' @" @^ @~ @= @u @v @H.
 2919 \let\, = \ptexc
 2920 \let\dotaccent = \ptexdot
 2921 \def\ringaccent#1{{\accent23 #1}}
 2922 \let\tieaccent = \ptext
 2923 \let\ubaraccent = \ptexb
 2924 \let\udotaccent = \d
 2925 
 2926 % Other special characters: @questiondown @exclamdown @ordf @ordm
 2927 % Plain TeX defines: @AA @AE @O @OE @L (plus lowercase versions) @ss.
 2928 \def\questiondown{?`}
 2929 \def\exclamdown{!`}
 2930 \def\ordf{\leavevmode\raise1ex\hbox{\selectfonts\lllsize \underbar{a}}}
 2931 \def\ordm{\leavevmode\raise1ex\hbox{\selectfonts\lllsize \underbar{o}}}
 2932 
 2933 % Dotless i and dotless j, used for accents.
 2934 \def\imacro{i}
 2935 \def\jmacro{j}
 2936 \def\dotless#1{%
 2937   \def\temp{#1}%
 2938   \ifx\temp\imacro \ifmmode\imath \else\ptexi \fi
 2939   \else\ifx\temp\jmacro \ifmmode\jmath \else\j \fi
 2940   \else \errmessage{@dotless can be used only with i or j}%
 2941   \fi\fi
 2942 }
 2943 
 2944 % The \TeX{} logo, as in plain, but resetting the spacing so that a
 2945 % period following counts as ending a sentence.  (Idea found in latex.)
 2946 %
 2947 \edef\TeX{\TeX \spacefactor=1000 }
 2948 
 2949 % @LaTeX{} logo.  Not quite the same results as the definition in
 2950 % latex.ltx, since we use a different font for the raised A; it's most
 2951 % convenient for us to use an explicitly smaller font, rather than using
 2952 % the \scriptstyle font (since we don't reset \scriptstyle and
 2953 % \scriptscriptstyle).
 2954 %
 2955 \def\LaTeX{%
 2956   L\kern-.36em
 2957   {\setbox0=\hbox{T}%
 2958    \vbox to \ht0{\hbox{%
 2959      \ifx\textnominalsize\xwordpt
 2960        % for 10pt running text, \lllsize (8pt) is too small for the A in LaTeX.
 2961        % Revert to plain's \scriptsize, which is 7pt.
 2962        \count255=\the\fam $\fam\count255 \scriptstyle A$%
 2963      \else
 2964        % For 11pt, we can use our lllsize.
 2965        \selectfonts\lllsize A%
 2966      \fi
 2967      }%
 2968      \vss
 2969   }}%
 2970   \kern-.15em
 2971   \TeX
 2972 }
 2973 
 2974 % Some math mode symbols.
 2975 \def\bullet{$\ptexbullet$}
 2976 \def\geq{\ifmmode \ge\else $\ge$\fi}
 2977 \def\leq{\ifmmode \le\else $\le$\fi}
 2978 \def\minus{\ifmmode -\else $-$\fi}
 2979 
 2980 % @dots{} outputs an ellipsis using the current font.
 2981 % We do .5em per period so that it has the same spacing in the cm
 2982 % typewriter fonts as three actual period characters; on the other hand,
 2983 % in other typewriter fonts three periods are wider than 1.5em.  So do
 2984 % whichever is larger.
 2985 %
 2986 \def\dots{%
 2987   \leavevmode
 2988   \setbox0=\hbox{...}% get width of three periods
 2989   \ifdim\wd0 > 1.5em
 2990     \dimen0 = \wd0
 2991   \else
 2992     \dimen0 = 1.5em
 2993   \fi
 2994   \hbox to \dimen0{%
 2995     \hskip 0pt plus.25fil
 2996     .\hskip 0pt plus1fil
 2997     .\hskip 0pt plus1fil
 2998     .\hskip 0pt plus.5fil
 2999   }%
 3000 }
 3001 
 3002 % @enddots{} is an end-of-sentence ellipsis.
 3003 %
 3004 \def\enddots{%
 3005   \dots
 3006   \spacefactor=\endofsentencespacefactor
 3007 }
 3008 
 3009 % @point{}, @result{}, @expansion{}, @print{}, @equiv{}.
 3010 %
 3011 % Since these characters are used in examples, they should be an even number of
 3012 % \tt widths. Each \tt character is 1en, so two makes it 1em.
 3013 %
 3014 \def\point{$\star$}
 3015 \def\arrow{\leavevmode\raise.05ex\hbox to 1em{\hfil$\rightarrow$\hfil}}
 3016 \def\result{\leavevmode\raise.05ex\hbox to 1em{\hfil$\Rightarrow$\hfil}}
 3017 \def\expansion{\leavevmode\hbox to 1em{\hfil$\mapsto$\hfil}}
 3018 \def\print{\leavevmode\lower.1ex\hbox to 1em{\hfil$\dashv$\hfil}}
 3019 \def\equiv{\leavevmode\hbox to 1em{\hfil$\ptexequiv$\hfil}}
 3020 
 3021 % The @error{} command.
 3022 % Adapted from the TeXbook's \boxit.
 3023 %
 3024 \newbox\errorbox
 3025 %
 3026 {\tentt \global\dimen0 = 3em}% Width of the box.
 3027 \dimen2 = .55pt % Thickness of rules
 3028 % The text. (`r' is open on the right, `e' somewhat less so on the left.)
 3029 \setbox0 = \hbox{\kern-.75pt \reducedsf \putworderror\kern-1.5pt}
 3030 %
 3031 \setbox\errorbox=\hbox to \dimen0{\hfil
 3032    \hsize = \dimen0 \advance\hsize by -5.8pt % Space to left+right.
 3033    \advance\hsize by -2\dimen2 % Rules.
 3034    \vbox{%
 3035       \hrule height\dimen2
 3036       \hbox{\vrule width\dimen2 \kern3pt          % Space to left of text.
 3037          \vtop{\kern2.4pt \box0 \kern2.4pt}% Space above/below.
 3038          \kern3pt\vrule width\dimen2}% Space to right.
 3039       \hrule height\dimen2}
 3040     \hfil}
 3041 %
 3042 \def\error{\leavevmode\lower.7ex\copy\errorbox}
 3043 
 3044 % @pounds{} is a sterling sign, which Knuth put in the CM italic font.
 3045 %
 3046 \def\pounds{{\it\$}}
 3047 
 3048 % @euro{} comes from a separate font, depending on the current style.
 3049 % We use the free feym* fonts from the eurosym package by Henrik
 3050 % Theiling, which support regular, slanted, bold and bold slanted (and
 3051 % "outlined" (blackboard board, sort of) versions, which we don't need).
 3052 % It is available from http://www.ctan.org/tex-archive/fonts/eurosym.
 3053 %
 3054 % Although only regular is the truly official Euro symbol, we ignore
 3055 % that.  The Euro is designed to be slightly taller than the regular
 3056 % font height.
 3057 %
 3058 % feymr - regular
 3059 % feymo - slanted
 3060 % feybr - bold
 3061 % feybo - bold slanted
 3062 %
 3063 % There is no good (free) typewriter version, to my knowledge.
 3064 % A feymr10 euro is ~7.3pt wide, while a normal cmtt10 char is ~5.25pt wide.
 3065 % Hmm.
 3066 %
 3067 % Also doesn't work in math.  Do we need to do math with euro symbols?
 3068 % Hope not.
 3069 %
 3070 %
 3071 \def\euro{{\eurofont e}}
 3072 \def\eurofont{%
 3073   % We set the font at each command, rather than predefining it in
 3074   % \textfonts and the other font-switching commands, so that
 3075   % installations which never need the symbol don't have to have the
 3076   % font installed.
 3077   %
 3078   % There is only one designed size (nominal 10pt), so we always scale
 3079   % that to the current nominal size.
 3080   %
 3081   % By the way, simply using "at 1em" works for cmr10 and the like, but
 3082   % does not work for cmbx10 and other extended/shrunken fonts.
 3083   %
 3084   \def\eurosize{\csname\curfontsize nominalsize\endcsname}%
 3085   %
 3086   \ifx\curfontstyle\bfstylename
 3087     % bold:
 3088     \font\thiseurofont = \ifusingit{feybo10}{feybr10} at \eurosize
 3089   \else
 3090     % regular:
 3091     \font\thiseurofont = \ifusingit{feymo10}{feymr10} at \eurosize
 3092   \fi
 3093   \thiseurofont
 3094 }
 3095 
 3096 % Glyphs from the EC fonts.  We don't use \let for the aliases, because
 3097 % sometimes we redefine the original macro, and the alias should reflect
 3098 % the redefinition.
 3099 %
 3100 % Use LaTeX names for the Icelandic letters.
 3101 \def\DH{{\ecfont \char"D0}} % Eth
 3102 \def\dh{{\ecfont \char"F0}} % eth
 3103 \def\TH{{\ecfont \char"DE}} % Thorn
 3104 \def\th{{\ecfont \char"FE}} % thorn
 3105 %
 3106 \def\guillemetleft{{\ecfont \char"13}}
 3107 \def\guillemotleft{\guillemetleft}
 3108 \def\guillemetright{{\ecfont \char"14}}
 3109 \def\guillemotright{\guillemetright}
 3110 \def\guilsinglleft{{\ecfont \char"0E}}
 3111 \def\guilsinglright{{\ecfont \char"0F}}
 3112 \def\quotedblbase{{\ecfont \char"12}}
 3113 \def\quotesinglbase{{\ecfont \char"0D}}
 3114 %
 3115 % This positioning is not perfect (see the ogonek LaTeX package), but
 3116 % we have the precomposed glyphs for the most common cases.  We put the
 3117 % tests to use those glyphs in the single \ogonek macro so we have fewer
 3118 % dummy definitions to worry about for index entries, etc.
 3119 %
 3120 % ogonek is also used with other letters in Lithuanian (IOU), but using
 3121 % the precomposed glyphs for those is not so easy since they aren't in
 3122 % the same EC font.
 3123 \def\ogonek#1{{%
 3124   \def\temp{#1}%
 3125   \ifx\temp\macrocharA\Aogonek
 3126   \else\ifx\temp\macrochara\aogonek
 3127   \else\ifx\temp\macrocharE\Eogonek
 3128   \else\ifx\temp\macrochare\eogonek
 3129   \else
 3130     \ecfont \setbox0=\hbox{#1}%
 3131     \ifdim\ht0=1ex\accent"0C #1%
 3132     \else\ooalign{\unhbox0\crcr\hidewidth\char"0C \hidewidth}%
 3133     \fi
 3134   \fi\fi\fi\fi
 3135   }%
 3136 }
 3137 \def\Aogonek{{\ecfont \char"81}}\def\macrocharA{A}
 3138 \def\aogonek{{\ecfont \char"A1}}\def\macrochara{a}
 3139 \def\Eogonek{{\ecfont \char"86}}\def\macrocharE{E}
 3140 \def\eogonek{{\ecfont \char"A6}}\def\macrochare{e}
 3141 %
 3142 % Use the ec* fonts (cm-super in outline format) for non-CM glyphs.
 3143 \def\ecfont{%
 3144   % We can't distinguish serif/sans and italic/slanted, but this
 3145   % is used for crude hacks anyway (like adding French and German
 3146   % quotes to documents typeset with CM, where we lose kerning), so
 3147   % hopefully nobody will notice/care.
 3148   \edef\ecsize{\csname\curfontsize ecsize\endcsname}%
 3149   \edef\nominalsize{\csname\curfontsize nominalsize\endcsname}%
 3150   \ifmonospace
 3151     % typewriter:
 3152     \font\thisecfont = ectt\ecsize \space at \nominalsize
 3153   \else
 3154     \ifx\curfontstyle\bfstylename
 3155       % bold:
 3156       \font\thisecfont = ecb\ifusingit{i}{x}\ecsize \space at \nominalsize
 3157     \else
 3158       % regular:
 3159       \font\thisecfont = ec\ifusingit{ti}{rm}\ecsize \space at \nominalsize
 3160     \fi
 3161   \fi
 3162   \thisecfont
 3163 }
 3164 
 3165 % @registeredsymbol - R in a circle.  The font for the R should really
 3166 % be smaller yet, but lllsize is the best we can do for now.
 3167 % Adapted from the plain.tex definition of \copyright.
 3168 %
 3169 \def\registeredsymbol{%
 3170   $^{{\ooalign{\hfil\raise.07ex\hbox{\selectfonts\lllsize R}%
 3171                \hfil\crcr\Orb}}%
 3172     }$%
 3173 }
 3174 
 3175 % @textdegree - the normal degrees sign.
 3176 %
 3177 \def\textdegree{$^\circ$}
 3178 
 3179 % Laurent Siebenmann reports \Orb undefined with:
 3180 %  Textures 1.7.7 (preloaded format=plain 93.10.14)  (68K)  16 APR 2004 02:38
 3181 % so we'll define it if necessary.
 3182 %
 3183 \ifx\Orb\thisisundefined
 3184 \def\Orb{\mathhexbox20D}
 3185 \fi
 3186 
 3187 % Quotes.
 3188 \chardef\quotedblleft="5C
 3189 \chardef\quotedblright=`\"
 3190 \chardef\quoteleft=`\`
 3191 \chardef\quoteright=`\'
 3192 
 3193 
 3194 \message{page headings,}
 3195 
 3196 \newskip\titlepagetopglue \titlepagetopglue = 1.5in
 3197 \newskip\titlepagebottomglue \titlepagebottomglue = 2pc
 3198 
 3199 % First the title page.  Must do @settitle before @titlepage.
 3200 \newif\ifseenauthor
 3201 \newif\iffinishedtitlepage
 3202 
 3203 % Do an implicit @contents or @shortcontents after @end titlepage if the
 3204 % user says @setcontentsaftertitlepage or @setshortcontentsaftertitlepage.
 3205 %
 3206 \newif\ifsetcontentsaftertitlepage
 3207  \let\setcontentsaftertitlepage = \setcontentsaftertitlepagetrue
 3208 \newif\ifsetshortcontentsaftertitlepage
 3209  \let\setshortcontentsaftertitlepage = \setshortcontentsaftertitlepagetrue
 3210 
 3211 \parseargdef\shorttitlepage{%
 3212   \begingroup \hbox{}\vskip 1.5in \chaprm \centerline{#1}%
 3213   \endgroup\page\hbox{}\page}
 3214 
 3215 \envdef\titlepage{%
 3216   % Open one extra group, as we want to close it in the middle of \Etitlepage.
 3217   \begingroup
 3218     \parindent=0pt \textfonts
 3219     % Leave some space at the very top of the page.
 3220     \vglue\titlepagetopglue
 3221     % No rule at page bottom unless we print one at the top with @title.
 3222     \finishedtitlepagetrue
 3223     %
 3224     % Most title ``pages'' are actually two pages long, with space
 3225     % at the top of the second.  We don't want the ragged left on the second.
 3226     \let\oldpage = \page
 3227     \def\page{%
 3228       \iffinishedtitlepage\else
 3229      \finishtitlepage
 3230       \fi
 3231       \let\page = \oldpage
 3232       \page
 3233       \null
 3234     }%
 3235 }
 3236 
 3237 \def\Etitlepage{%
 3238     \iffinishedtitlepage\else
 3239     \finishtitlepage
 3240     \fi
 3241     % It is important to do the page break before ending the group,
 3242     % because the headline and footline are only empty inside the group.
 3243     % If we use the new definition of \page, we always get a blank page
 3244     % after the title page, which we certainly don't want.
 3245     \oldpage
 3246   \endgroup
 3247   %
 3248   % Need this before the \...aftertitlepage checks so that if they are
 3249   % in effect the toc pages will come out with page numbers.
 3250   \HEADINGSon
 3251   %
 3252   % If they want short, they certainly want long too.
 3253   \ifsetshortcontentsaftertitlepage
 3254     \shortcontents
 3255     \contents
 3256     \global\let\shortcontents = \relax
 3257     \global\let\contents = \relax
 3258   \fi
 3259   %
 3260   \ifsetcontentsaftertitlepage
 3261     \contents
 3262     \global\let\contents = \relax
 3263     \global\let\shortcontents = \relax
 3264   \fi
 3265 }
 3266 
 3267 \def\finishtitlepage{%
 3268   \vskip4pt \hrule height 2pt width \hsize
 3269   \vskip\titlepagebottomglue
 3270   \finishedtitlepagetrue
 3271 }
 3272 
 3273 % Settings used for typesetting titles: no hyphenation, no indentation,
 3274 % don't worry much about spacing, ragged right.  This should be used
 3275 % inside a \vbox, and fonts need to be set appropriately first.  Because
 3276 % it is always used for titles, nothing else, we call \rmisbold.  \par
 3277 % should be specified before the end of the \vbox, since a vbox is a group.
 3278 % 
 3279 \def\raggedtitlesettings{%
 3280   \rmisbold
 3281   \hyphenpenalty=10000
 3282   \parindent=0pt
 3283   \tolerance=5000
 3284   \ptexraggedright
 3285 }
 3286 
 3287 % Macros to be used within @titlepage:
 3288 
 3289 \let\subtitlerm=\tenrm
 3290 \def\subtitlefont{\subtitlerm \normalbaselineskip = 13pt \normalbaselines}
 3291 
 3292 \parseargdef\title{%
 3293   \checkenv\titlepage
 3294   \vbox{\titlefonts \raggedtitlesettings #1\par}%
 3295   % print a rule at the page bottom also.
 3296   \finishedtitlepagefalse
 3297   \vskip4pt \hrule height 4pt width \hsize \vskip4pt
 3298 }
 3299 
 3300 \parseargdef\subtitle{%
 3301   \checkenv\titlepage
 3302   {\subtitlefont \rightline{#1}}%
 3303 }
 3304 
 3305 % @author should come last, but may come many times.
 3306 % It can also be used inside @quotation.
 3307 %
 3308 \parseargdef\author{%
 3309   \def\temp{\quotation}%
 3310   \ifx\thisenv\temp
 3311     \def\quotationauthor{#1}% printed in \Equotation.
 3312   \else
 3313     \checkenv\titlepage
 3314     \ifseenauthor\else \vskip 0pt plus 1filll \seenauthortrue \fi
 3315     {\secfonts\rmisbold \leftline{#1}}%
 3316   \fi
 3317 }
 3318 
 3319 
 3320 % Set up page headings and footings.
 3321 
 3322 \let\thispage=\folio
 3323 
 3324 \newtoks\evenheadline    % headline on even pages
 3325 \newtoks\oddheadline     % headline on odd pages
 3326 \newtoks\evenfootline    % footline on even pages
 3327 \newtoks\oddfootline     % footline on odd pages
 3328 
 3329 % Now make TeX use those variables
 3330 \headline={{\textfonts\rm \ifodd\pageno \the\oddheadline
 3331                             \else \the\evenheadline \fi}}
 3332 \footline={{\textfonts\rm \ifodd\pageno \the\oddfootline
 3333                             \else \the\evenfootline \fi}\HEADINGShook}
 3334 \let\HEADINGShook=\relax
 3335 
 3336 % Commands to set those variables.
 3337 % For example, this is what  @headings on  does
 3338 % @evenheading @thistitle|@thispage|@thischapter
 3339 % @oddheading @thischapter|@thispage|@thistitle
 3340 % @evenfooting @thisfile||
 3341 % @oddfooting ||@thisfile
 3342 
 3343 
 3344 \def\evenheading{\parsearg\evenheadingxxx}
 3345 \def\evenheadingxxx #1{\evenheadingyyy #1\|\|\|\|\finish}
 3346 \def\evenheadingyyy #1\|#2\|#3\|#4\finish{%
 3347 \global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
 3348 
 3349 \def\oddheading{\parsearg\oddheadingxxx}
 3350 \def\oddheadingxxx #1{\oddheadingyyy #1\|\|\|\|\finish}
 3351 \def\oddheadingyyy #1\|#2\|#3\|#4\finish{%
 3352 \global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
 3353 
 3354 \parseargdef\everyheading{\oddheadingxxx{#1}\evenheadingxxx{#1}}%
 3355 
 3356 \def\evenfooting{\parsearg\evenfootingxxx}
 3357 \def\evenfootingxxx #1{\evenfootingyyy #1\|\|\|\|\finish}
 3358 \def\evenfootingyyy #1\|#2\|#3\|#4\finish{%
 3359 \global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
 3360 
 3361 \def\oddfooting{\parsearg\oddfootingxxx}
 3362 \def\oddfootingxxx #1{\oddfootingyyy #1\|\|\|\|\finish}
 3363 \def\oddfootingyyy #1\|#2\|#3\|#4\finish{%
 3364   \global\oddfootline = {\rlap{\centerline{#2}}\line{#1\hfil#3}}%
 3365   %
 3366   % Leave some space for the footline.  Hopefully ok to assume
 3367   % @evenfooting will not be used by itself.
 3368   \global\advance\pageheight by -12pt
 3369   \global\advance\vsize by -12pt
 3370 }
 3371 
 3372 \parseargdef\everyfooting{\oddfootingxxx{#1}\evenfootingxxx{#1}}
 3373 
 3374 % @evenheadingmarks top     \thischapter <- chapter at the top of a page
 3375 % @evenheadingmarks bottom  \thischapter <- chapter at the bottom of a page
 3376 %
 3377 % The same set of arguments for:
 3378 %
 3379 % @oddheadingmarks
 3380 % @evenfootingmarks
 3381 % @oddfootingmarks
 3382 % @everyheadingmarks
 3383 % @everyfootingmarks
 3384 
 3385 \def\evenheadingmarks{\headingmarks{even}{heading}}
 3386 \def\oddheadingmarks{\headingmarks{odd}{heading}}
 3387 \def\evenfootingmarks{\headingmarks{even}{footing}}
 3388 \def\oddfootingmarks{\headingmarks{odd}{footing}}
 3389 \def\everyheadingmarks#1 {\headingmarks{even}{heading}{#1}
 3390                           \headingmarks{odd}{heading}{#1} }
 3391 \def\everyfootingmarks#1 {\headingmarks{even}{footing}{#1}
 3392                           \headingmarks{odd}{footing}{#1} }
 3393 % #1 = even/odd, #2 = heading/footing, #3 = top/bottom.
 3394 \def\headingmarks#1#2#3 {%
 3395   \expandafter\let\expandafter\temp \csname get#3headingmarks\endcsname
 3396   \global\expandafter\let\csname get#1#2marks\endcsname \temp
 3397 }
 3398 
 3399 \everyheadingmarks bottom
 3400 \everyfootingmarks bottom
 3401 
 3402 % @headings double      turns headings on for double-sided printing.
 3403 % @headings single      turns headings on for single-sided printing.
 3404 % @headings off         turns them off.
 3405 % @headings on          same as @headings double, retained for compatibility.
 3406 % @headings after       turns on double-sided headings after this page.
 3407 % @headings doubleafter turns on double-sided headings after this page.
 3408 % @headings singleafter turns on single-sided headings after this page.
 3409 % By default, they are off at the start of a document,
 3410 % and turned `on' after @end titlepage.
 3411 
 3412 \def\headings #1 {\csname HEADINGS#1\endcsname}
 3413 
 3414 \def\headingsoff{% non-global headings elimination
 3415   \evenheadline={\hfil}\evenfootline={\hfil}%
 3416    \oddheadline={\hfil}\oddfootline={\hfil}%
 3417 }
 3418 
 3419 \def\HEADINGSoff{{\globaldefs=1 \headingsoff}} % global setting
 3420 \HEADINGSoff  % it's the default
 3421 
 3422 % When we turn headings on, set the page number to 1.
 3423 % For double-sided printing, put current file name in lower left corner,
 3424 % chapter name on inside top of right hand pages, document
 3425 % title on inside top of left hand pages, and page numbers on outside top
 3426 % edge of all pages.
 3427 \def\HEADINGSdouble{%
 3428 \global\pageno=1
 3429 \global\evenfootline={\hfil}
 3430 \global\oddfootline={\hfil}
 3431 \global\evenheadline={\line{\folio\hfil\thistitle}}
 3432 \global\oddheadline={\line{\thischapter\hfil\folio}}
 3433 \global\let\contentsalignmacro = \chapoddpage
 3434 }
 3435 \let\contentsalignmacro = \chappager
 3436 
 3437 % For single-sided printing, chapter title goes across top left of page,
 3438 % page number on top right.
 3439 \def\HEADINGSsingle{%
 3440 \global\pageno=1
 3441 \global\evenfootline={\hfil}
 3442 \global\oddfootline={\hfil}
 3443 \global\evenheadline={\line{\thischapter\hfil\folio}}
 3444 \global\oddheadline={\line{\thischapter\hfil\folio}}
 3445 \global\let\contentsalignmacro = \chappager
 3446 }
 3447 \def\HEADINGSon{\HEADINGSdouble}
 3448 
 3449 \def\HEADINGSafter{\let\HEADINGShook=\HEADINGSdoublex}
 3450 \let\HEADINGSdoubleafter=\HEADINGSafter
 3451 \def\HEADINGSdoublex{%
 3452 \global\evenfootline={\hfil}
 3453 \global\oddfootline={\hfil}
 3454 \global\evenheadline={\line{\folio\hfil\thistitle}}
 3455 \global\oddheadline={\line{\thischapter\hfil\folio}}
 3456 \global\let\contentsalignmacro = \chapoddpage
 3457 }
 3458 
 3459 \def\HEADINGSsingleafter{\let\HEADINGShook=\HEADINGSsinglex}
 3460 \def\HEADINGSsinglex{%
 3461 \global\evenfootline={\hfil}
 3462 \global\oddfootline={\hfil}
 3463 \global\evenheadline={\line{\thischapter\hfil\folio}}
 3464 \global\oddheadline={\line{\thischapter\hfil\folio}}
 3465 \global\let\contentsalignmacro = \chappager
 3466 }
 3467 
 3468 % Subroutines used in generating headings
 3469 % This produces Day Month Year style of output.
 3470 % Only define if not already defined, in case a txi-??.tex file has set
 3471 % up a different format (e.g., txi-cs.tex does this).
 3472 \ifx\today\thisisundefined
 3473 \def\today{%
 3474   \number\day\space
 3475   \ifcase\month
 3476   \or\putwordMJan\or\putwordMFeb\or\putwordMMar\or\putwordMApr
 3477   \or\putwordMMay\or\putwordMJun\or\putwordMJul\or\putwordMAug
 3478   \or\putwordMSep\or\putwordMOct\or\putwordMNov\or\putwordMDec
 3479   \fi
 3480   \space\number\year}
 3481 \fi
 3482 
 3483 % @settitle line...  specifies the title of the document, for headings.
 3484 % It generates no output of its own.
 3485 \def\thistitle{\putwordNoTitle}
 3486 \def\settitle{\parsearg{\gdef\thistitle}}
 3487 
 3488 
 3489 \message{tables,}
 3490 % Tables -- @table, @ftable, @vtable, @item(x).
 3491 
 3492 % default indentation of table text
 3493 \newdimen\tableindent \tableindent=.8in
 3494 % default indentation of @itemize and @enumerate text
 3495 \newdimen\itemindent  \itemindent=.3in
 3496 % margin between end of table item and start of table text.
 3497 \newdimen\itemmargin  \itemmargin=.1in
 3498 
 3499 % used internally for \itemindent minus \itemmargin
 3500 \newdimen\itemmax
 3501 
 3502 % Note @table, @ftable, and @vtable define @item, @itemx, etc., with
 3503 % these defs.
 3504 % They also define \itemindex
 3505 % to index the item name in whatever manner is desired (perhaps none).
 3506 
 3507 \newif\ifitemxneedsnegativevskip
 3508 
 3509 \def\itemxpar{\par\ifitemxneedsnegativevskip\nobreak\vskip-\parskip\nobreak\fi}
 3510 
 3511 \def\internalBitem{\smallbreak \parsearg\itemzzz}
 3512 \def\internalBitemx{\itemxpar \parsearg\itemzzz}
 3513 
 3514 \def\itemzzz #1{\begingroup %
 3515   \advance\hsize by -\rightskip
 3516   \advance\hsize by -\tableindent
 3517   \setbox0=\hbox{\itemindicate{#1}}%
 3518   \itemindex{#1}%
 3519   \nobreak % This prevents a break before @itemx.
 3520   %
 3521   % If the item text does not fit in the space we have, put it on a line
 3522   % by itself, and do not allow a page break either before or after that
 3523   % line.  We do not start a paragraph here because then if the next
 3524   % command is, e.g., @kindex, the whatsit would get put into the
 3525   % horizontal list on a line by itself, resulting in extra blank space.
 3526   \ifdim \wd0>\itemmax
 3527     %
 3528     % Make this a paragraph so we get the \parskip glue and wrapping,
 3529     % but leave it ragged-right.
 3530     \begingroup
 3531       \advance\leftskip by-\tableindent
 3532       \advance\hsize by\tableindent
 3533       \advance\rightskip by0pt plus1fil\relax
 3534       \leavevmode\unhbox0\par
 3535     \endgroup
 3536     %
 3537     % We're going to be starting a paragraph, but we don't want the
 3538     % \parskip glue -- logically it's part of the @item we just started.
 3539     \nobreak \vskip-\parskip
 3540     %
 3541     % Stop a page break at the \parskip glue coming up.  However, if
 3542     % what follows is an environment such as @example, there will be no
 3543     % \parskip glue; then the negative vskip we just inserted would
 3544     % cause the example and the item to crash together.  So we use this
 3545     % bizarre value of 10001 as a signal to \aboveenvbreak to insert
 3546     % \parskip glue after all.  Section titles are handled this way also.
 3547     %
 3548     \penalty 10001
 3549     \endgroup
 3550     \itemxneedsnegativevskipfalse
 3551   \else
 3552     % The item text fits into the space.  Start a paragraph, so that the
 3553     % following text (if any) will end up on the same line.
 3554     \noindent
 3555     % Do this with kerns and \unhbox so that if there is a footnote in
 3556     % the item text, it can migrate to the main vertical list and
 3557     % eventually be printed.
 3558     \nobreak\kern-\tableindent
 3559     \dimen0 = \itemmax  \advance\dimen0 by \itemmargin \advance\dimen0 by -\wd0
 3560     \unhbox0
 3561     \nobreak\kern\dimen0
 3562     \endgroup
 3563     \itemxneedsnegativevskiptrue
 3564   \fi
 3565 }
 3566 
 3567 \def\item{\errmessage{@item while not in a list environment}}
 3568 \def\itemx{\errmessage{@itemx while not in a list environment}}
 3569 
 3570 % @table, @ftable, @vtable.
 3571 \envdef\table{%
 3572   \let\itemindex\gobble
 3573   \tablecheck{table}%
 3574 }
 3575 \envdef\ftable{%
 3576   \def\itemindex ##1{\doind {fn}{\code{##1}}}%
 3577   \tablecheck{ftable}%
 3578 }
 3579 \envdef\vtable{%
 3580   \def\itemindex ##1{\doind {vr}{\code{##1}}}%
 3581   \tablecheck{vtable}%
 3582 }
 3583 \def\tablecheck#1{%
 3584   \ifnum \the\catcode`\^^M=\active
 3585     \endgroup
 3586     \errmessage{This command won't work in this context; perhaps the problem is
 3587       that we are \inenvironment\thisenv}%
 3588     \def\next{\doignore{#1}}%
 3589   \else
 3590     \let\next\tablex
 3591   \fi
 3592   \next
 3593 }
 3594 \def\tablex#1{%
 3595   \def\itemindicate{#1}%
 3596   \parsearg\tabley
 3597 }
 3598 \def\tabley#1{%
 3599   {%
 3600     \makevalueexpandable
 3601     \edef\temp{\noexpand\tablez #1\space\space\space}%
 3602     \expandafter
 3603   }\temp \endtablez
 3604 }
 3605 \def\tablez #1 #2 #3 #4\endtablez{%
 3606   \aboveenvbreak
 3607   \ifnum 0#1>0 \advance \leftskip by #1\mil \fi
 3608   \ifnum 0#2>0 \tableindent=#2\mil \fi
 3609   \ifnum 0#3>0 \advance \rightskip by #3\mil \fi
 3610   \itemmax=\tableindent
 3611   \advance \itemmax by -\itemmargin
 3612   \advance \leftskip by \tableindent
 3613   \exdentamount=\tableindent
 3614   \parindent = 0pt
 3615   \parskip = \smallskipamount
 3616   \ifdim \parskip=0pt \parskip=2pt \fi
 3617   \let\item = \internalBitem
 3618   \let\itemx = \internalBitemx
 3619 }
 3620 \def\Etable{\endgraf\afterenvbreak}
 3621 \let\Eftable\Etable
 3622 \let\Evtable\Etable
 3623 \let\Eitemize\Etable
 3624 \let\Eenumerate\Etable
 3625 
 3626 % This is the counter used by @enumerate, which is really @itemize
 3627 
 3628 \newcount \itemno
 3629 
 3630 \envdef\itemize{\parsearg\doitemize}
 3631 
 3632 \def\doitemize#1{%
 3633   \aboveenvbreak
 3634   \itemmax=\itemindent
 3635   \advance\itemmax by -\itemmargin
 3636   \advance\leftskip by \itemindent
 3637   \exdentamount=\itemindent
 3638   \parindent=0pt
 3639   \parskip=\smallskipamount
 3640   \ifdim\parskip=0pt \parskip=2pt \fi
 3641   %
 3642   % Try typesetting the item mark that if the document erroneously says
 3643   % something like @itemize @samp (intending @table), there's an error
 3644   % right away at the @itemize.  It's not the best error message in the
 3645   % world, but it's better than leaving it to the @item.  This means if
 3646   % the user wants an empty mark, they have to say @w{} not just @w.
 3647   \def\itemcontents{#1}%
 3648   \setbox0 = \hbox{\itemcontents}%
 3649   %
 3650   % @itemize with no arg is equivalent to @itemize @bullet.
 3651   \ifx\itemcontents\empty\def\itemcontents{\bullet}\fi
 3652   %
 3653   \let\item=\itemizeitem
 3654 }
 3655 
 3656 % Definition of @item while inside @itemize and @enumerate.
 3657 %
 3658 \def\itemizeitem{%
 3659   \advance\itemno by 1  % for enumerations
 3660   {\let\par=\endgraf \smallbreak}% reasonable place to break
 3661   {%
 3662    % If the document has an @itemize directly after a section title, a
 3663    % \nobreak will be last on the list, and \sectionheading will have
 3664    % done a \vskip-\parskip.  In that case, we don't want to zero
 3665    % parskip, or the item text will crash with the heading.  On the
 3666    % other hand, when there is normal text preceding the item (as there
 3667    % usually is), we do want to zero parskip, or there would be too much
 3668    % space.  In that case, we won't have a \nobreak before.  At least
 3669    % that's the theory.
 3670    \ifnum\lastpenalty<10000 \parskip=0in \fi
 3671    \noindent
 3672    \hbox to 0pt{\hss \itemcontents \kern\itemmargin}%
 3673    %
 3674    \vadjust{\penalty 1200}}% not good to break after first line of item.
 3675   \flushcr
 3676 }
 3677 
 3678 % \splitoff TOKENS\endmark defines \first to be the first token in
 3679 % TOKENS, and \rest to be the remainder.
 3680 %
 3681 \def\splitoff#1#2\endmark{\def\first{#1}\def\rest{#2}}%
 3682 
 3683 % Allow an optional argument of an uppercase letter, lowercase letter,
 3684 % or number, to specify the first label in the enumerated list.  No
 3685 % argument is the same as `1'.
 3686 %
 3687 \envparseargdef\enumerate{\enumeratey #1  \endenumeratey}
 3688 \def\enumeratey #1 #2\endenumeratey{%
 3689   % If we were given no argument, pretend we were given `1'.
 3690   \def\thearg{#1}%
 3691   \ifx\thearg\empty \def\thearg{1}\fi
 3692   %
 3693   % Detect if the argument is a single token.  If so, it might be a
 3694   % letter.  Otherwise, the only valid thing it can be is a number.
 3695   % (We will always have one token, because of the test we just made.
 3696   % This is a good thing, since \splitoff doesn't work given nothing at
 3697   % all -- the first parameter is undelimited.)
 3698   \expandafter\splitoff\thearg\endmark
 3699   \ifx\rest\empty
 3700     % Only one token in the argument.  It could still be anything.
 3701     % A ``lowercase letter'' is one whose \lccode is nonzero.
 3702     % An ``uppercase letter'' is one whose \lccode is both nonzero, and
 3703     %   not equal to itself.
 3704     % Otherwise, we assume it's a number.
 3705     %
 3706     % We need the \relax at the end of the \ifnum lines to stop TeX from
 3707     % continuing to look for a <number>.
 3708     %
 3709     \ifnum\lccode\expandafter`\thearg=0\relax
 3710       \numericenumerate % a number (we hope)
 3711     \else
 3712       % It's a letter.
 3713       \ifnum\lccode\expandafter`\thearg=\expandafter`\thearg\relax
 3714         \lowercaseenumerate % lowercase letter
 3715       \else
 3716         \uppercaseenumerate % uppercase letter
 3717       \fi
 3718     \fi
 3719   \else
 3720     % Multiple tokens in the argument.  We hope it's a number.
 3721     \numericenumerate
 3722   \fi
 3723 }
 3724 
 3725 % An @enumerate whose labels are integers.  The starting integer is
 3726 % given in \thearg.
 3727 %
 3728 \def\numericenumerate{%
 3729   \itemno = \thearg
 3730   \startenumeration{\the\itemno}%
 3731 }
 3732 
 3733 % The starting (lowercase) letter is in \thearg.
 3734 \def\lowercaseenumerate{%
 3735   \itemno = \expandafter`\thearg
 3736   \startenumeration{%
 3737     % Be sure we're not beyond the end of the alphabet.
 3738     \ifnum\itemno=0
 3739       \errmessage{No more lowercase letters in @enumerate; get a bigger
 3740                   alphabet}%
 3741     \fi
 3742     \char\lccode\itemno
 3743   }%
 3744 }
 3745 
 3746 % The starting (uppercase) letter is in \thearg.
 3747 \def\uppercaseenumerate{%
 3748   \itemno = \expandafter`\thearg
 3749   \startenumeration{%
 3750     % Be sure we're not beyond the end of the alphabet.
 3751     \ifnum\itemno=0
 3752       \errmessage{No more uppercase letters in @enumerate; get a bigger
 3753                   alphabet}
 3754     \fi
 3755     \char\uccode\itemno
 3756   }%
 3757 }
 3758 
 3759 % Call \doitemize, adding a period to the first argument and supplying the
 3760 % common last two arguments.  Also subtract one from the initial value in
 3761 % \itemno, since @item increments \itemno.
 3762 %
 3763 \def\startenumeration#1{%
 3764   \advance\itemno by -1
 3765   \doitemize{#1.}\flushcr
 3766 }
 3767 
 3768 % @alphaenumerate and @capsenumerate are abbreviations for giving an arg
 3769 % to @enumerate.
 3770 %
 3771 \def\alphaenumerate{\enumerate{a}}
 3772 \def\capsenumerate{\enumerate{A}}
 3773 \def\Ealphaenumerate{\Eenumerate}
 3774 \def\Ecapsenumerate{\Eenumerate}
 3775 
 3776 
 3777 % @multitable macros
 3778 % Amy Hendrickson, 8/18/94, 3/6/96
 3779 %
 3780 % @multitable ... @end multitable will make as many columns as desired.
 3781 % Contents of each column will wrap at width given in preamble.  Width
 3782 % can be specified either with sample text given in a template line,
 3783 % or in percent of \hsize, the current width of text on page.
 3784 
 3785 % Table can continue over pages but will only break between lines.
 3786 
 3787 % To make preamble:
 3788 %
 3789 % Either define widths of columns in terms of percent of \hsize:
 3790 %   @multitable @columnfractions .25 .3 .45
 3791 %   @item ...
 3792 %
 3793 %   Numbers following @columnfractions are the percent of the total
 3794 %   current hsize to be used for each column. You may use as many
 3795 %   columns as desired.
 3796 
 3797 
 3798 % Or use a template:
 3799 %   @multitable {Column 1 template} {Column 2 template} {Column 3 template}
 3800 %   @item ...
 3801 %   using the widest term desired in each column.
 3802 
 3803 % Each new table line starts with @item, each subsequent new column
 3804 % starts with @tab. Empty columns may be produced by supplying @tab's
 3805 % with nothing between them for as many times as empty columns are needed,
 3806 % ie, @tab@tab@tab will produce two empty columns.
 3807 
 3808 % @item, @tab do not need to be on their own lines, but it will not hurt
 3809 % if they are.
 3810 
 3811 % Sample multitable:
 3812 
 3813 %   @multitable {Column 1 template} {Column 2 template} {Column 3 template}
 3814 %   @item first col stuff @tab second col stuff @tab third col
 3815 %   @item
 3816 %   first col stuff
 3817 %   @tab
 3818 %   second col stuff
 3819 %   @tab
 3820 %   third col
 3821 %   @item first col stuff @tab second col stuff
 3822 %   @tab Many paragraphs of text may be used in any column.
 3823 %
 3824 %         They will wrap at the width determined by the template.
 3825 %   @item@tab@tab This will be in third column.
 3826 %   @end multitable
 3827 
 3828 % Default dimensions may be reset by user.
 3829 % @multitableparskip is vertical space between paragraphs in table.
 3830 % @multitableparindent is paragraph indent in table.
 3831 % @multitablecolmargin is horizontal space to be left between columns.
 3832 % @multitablelinespace is space to leave between table items, baseline
 3833 %                                                            to baseline.
 3834 %   0pt means it depends on current normal line spacing.
 3835 %
 3836 \newskip\multitableparskip
 3837 \newskip\multitableparindent
 3838 \newdimen\multitablecolspace
 3839 \newskip\multitablelinespace
 3840 \multitableparskip=0pt
 3841 \multitableparindent=6pt
 3842 \multitablecolspace=12pt
 3843 \multitablelinespace=0pt
 3844 
 3845 % Macros used to set up halign preamble:
 3846 %
 3847 \let\endsetuptable\relax
 3848 \def\xendsetuptable{\endsetuptable}
 3849 \let\columnfractions\relax
 3850 \def\xcolumnfractions{\columnfractions}
 3851 \newif\ifsetpercent
 3852 
 3853 % #1 is the @columnfraction, usually a decimal number like .5, but might
 3854 % be just 1.  We just use it, whatever it is.
 3855 %
 3856 \def\pickupwholefraction#1 {%
 3857   \global\advance\colcount by 1
 3858   \expandafter\xdef\csname col\the\colcount\endcsname{#1\hsize}%
 3859   \setuptable
 3860 }
 3861 
 3862 \newcount\colcount
 3863 \def\setuptable#1{%
 3864   \def\firstarg{#1}%
 3865   \ifx\firstarg\xendsetuptable
 3866     \let\go = \relax
 3867   \else
 3868     \ifx\firstarg\xcolumnfractions
 3869       \global\setpercenttrue
 3870     \else
 3871       \ifsetpercent
 3872          \let\go\pickupwholefraction
 3873       \else
 3874          \global\advance\colcount by 1
 3875          \setbox0=\hbox{#1\unskip\space}% Add a normal word space as a
 3876                    % separator; typically that is always in the input, anyway.
 3877          \expandafter\xdef\csname col\the\colcount\endcsname{\the\wd0}%
 3878       \fi
 3879     \fi
 3880     \ifx\go\pickupwholefraction
 3881       % Put the argument back for the \pickupwholefraction call, so
 3882       % we'll always have a period there to be parsed.
 3883       \def\go{\pickupwholefraction#1}%
 3884     \else
 3885       \let\go = \setuptable
 3886     \fi%
 3887   \fi
 3888   \go
 3889 }
 3890 
 3891 % multitable-only commands.
 3892 %
 3893 % @headitem starts a heading row, which we typeset in bold.
 3894 % Assignments have to be global since we are inside the implicit group
 3895 % of an alignment entry.  \everycr resets \everytab so we don't have to
 3896 % undo it ourselves.
 3897 \def\headitemfont{\b}% for people to use in the template row; not changeable
 3898 \def\headitem{%
 3899   \checkenv\multitable
 3900   \crcr
 3901   \global\everytab={\bf}% can't use \headitemfont since the parsing differs
 3902   \the\everytab % for the first item
 3903 }%
 3904 %
 3905 % A \tab used to include \hskip1sp.  But then the space in a template
 3906 % line is not enough.  That is bad.  So let's go back to just `&' until
 3907 % we again encounter the problem the 1sp was intended to solve.
 3908 %                   --karl, nathan@acm.org, 20apr99.
 3909 \def\tab{\checkenv\multitable &\the\everytab}%
 3910 
 3911 % @multitable ... @end multitable definitions:
 3912 %
 3913 \newtoks\everytab  % insert after every tab.
 3914 %
 3915 \envdef\multitable{%
 3916   \vskip\parskip
 3917   \startsavinginserts
 3918   %
 3919   % @item within a multitable starts a normal row.
 3920   % We use \def instead of \let so that if one of the multitable entries
 3921   % contains an @itemize, we don't choke on the \item (seen as \crcr aka
 3922   % \endtemplate) expanding \doitemize.
 3923   \def\item{\crcr}%
 3924   %
 3925   \tolerance=9500
 3926   \hbadness=9500
 3927   \setmultitablespacing
 3928   \parskip=\multitableparskip
 3929   \parindent=\multitableparindent
 3930   \overfullrule=0pt
 3931   \global\colcount=0
 3932   %
 3933   \everycr = {%
 3934     \noalign{%
 3935       \global\everytab={}%
 3936       \global\colcount=0 % Reset the column counter.
 3937       % Check for saved footnotes, etc.
 3938       \checkinserts
 3939       % Keeps underfull box messages off when table breaks over pages.
 3940       %\filbreak
 3941     % Maybe so, but it also creates really weird page breaks when the
 3942     % table breaks over pages. Wouldn't \vfil be better?  Wait until the
 3943     % problem manifests itself, so it can be fixed for real --karl.
 3944     }%
 3945   }%
 3946   %
 3947   \parsearg\domultitable
 3948 }
 3949 \def\domultitable#1{%
 3950   % To parse everything between @multitable and @item:
 3951   \setuptable#1 \endsetuptable
 3952   %
 3953   % This preamble sets up a generic column definition, which will
 3954   % be used as many times as user calls for columns.
 3955   % \vtop will set a single line and will also let text wrap and
 3956   % continue for many paragraphs if desired.
 3957   \halign\bgroup &%
 3958     \global\advance\colcount by 1
 3959     \multistrut
 3960     \vtop{%
 3961       % Use the current \colcount to find the correct column width:
 3962       \hsize=\expandafter\csname col\the\colcount\endcsname
 3963       %
 3964       % In order to keep entries from bumping into each other
 3965       % we will add a \leftskip of \multitablecolspace to all columns after
 3966       % the first one.
 3967       %
 3968       % If a template has been used, we will add \multitablecolspace
 3969       % to the width of each template entry.
 3970       %
 3971       % If the user has set preamble in terms of percent of \hsize we will
 3972       % use that dimension as the width of the column, and the \leftskip
 3973       % will keep entries from bumping into each other.  Table will start at
 3974       % left margin and final column will justify at right margin.
 3975       %
 3976       % Make sure we don't inherit \rightskip from the outer environment.
 3977       \rightskip=0pt
 3978       \ifnum\colcount=1
 3979     % The first column will be indented with the surrounding text.
 3980     \advance\hsize by\leftskip
 3981       \else
 3982     \ifsetpercent \else
 3983       % If user has not set preamble in terms of percent of \hsize
 3984       % we will advance \hsize by \multitablecolspace.
 3985       \advance\hsize by \multitablecolspace
 3986     \fi
 3987        % In either case we will make \leftskip=\multitablecolspace:
 3988       \leftskip=\multitablecolspace
 3989       \fi
 3990       % Ignoring space at the beginning and end avoids an occasional spurious
 3991       % blank line, when TeX decides to break the line at the space before the
 3992       % box from the multistrut, so the strut ends up on a line by itself.
 3993       % For example:
 3994       % @multitable @columnfractions .11 .89
 3995       % @item @code{#}
 3996       % @tab Legal holiday which is valid in major parts of the whole country.
 3997       % Is automatically provided with highlighting sequences respectively
 3998       % marking characters.
 3999       \noindent\ignorespaces##\unskip\multistrut
 4000     }\cr
 4001 }
 4002 \def\Emultitable{%
 4003   \crcr
 4004   \egroup % end the \halign
 4005   \global\setpercentfalse
 4006 }
 4007 
 4008 \def\setmultitablespacing{%
 4009   \def\multistrut{\strut}% just use the standard line spacing
 4010   %
 4011   % Compute \multitablelinespace (if not defined by user) for use in
 4012   % \multitableparskip calculation.  We used define \multistrut based on
 4013   % this, but (ironically) that caused the spacing to be off.
 4014   % See bug-texinfo report from Werner Lemberg, 31 Oct 2004 12:52:20 +0100.
 4015 \ifdim\multitablelinespace=0pt
 4016 \setbox0=\vbox{X}\global\multitablelinespace=\the\baselineskip
 4017 \global\advance\multitablelinespace by-\ht0
 4018 \fi
 4019 % Test to see if parskip is larger than space between lines of
 4020 % table. If not, do nothing.
 4021 %        If so, set to same dimension as multitablelinespace.
 4022 \ifdim\multitableparskip>\multitablelinespace
 4023 \global\multitableparskip=\multitablelinespace
 4024 \global\advance\multitableparskip-7pt % to keep parskip somewhat smaller
 4025                                       % than skip between lines in the table.
 4026 \fi%
 4027 \ifdim\multitableparskip=0pt
 4028 \global\multitableparskip=\multitablelinespace
 4029 \global\advance\multitableparskip-7pt % to keep parskip somewhat smaller
 4030                                       % than skip between lines in the table.
 4031 \fi}
 4032 
 4033 
 4034 \message{conditionals,}
 4035 
 4036 % @iftex, @ifnotdocbook, @ifnothtml, @ifnotinfo, @ifnotplaintext,
 4037 % @ifnotxml always succeed.  They currently do nothing; we don't
 4038 % attempt to check whether the conditionals are properly nested.  But we
 4039 % have to remember that they are conditionals, so that @end doesn't
 4040 % attempt to close an environment group.
 4041 %
 4042 \def\makecond#1{%
 4043   \expandafter\let\csname #1\endcsname = \relax
 4044   \expandafter\let\csname iscond.#1\endcsname = 1
 4045 }
 4046 \makecond{iftex}
 4047 \makecond{ifnotdocbook}
 4048 \makecond{ifnothtml}
 4049 \makecond{ifnotinfo}
 4050 \makecond{ifnotplaintext}
 4051 \makecond{ifnotxml}
 4052 
 4053 % Ignore @ignore, @ifhtml, @ifinfo, and the like.
 4054 %
 4055 \def\direntry{\doignore{direntry}}
 4056 \def\documentdescription{\doignore{documentdescription}}
 4057 \def\docbook{\doignore{docbook}}
 4058 \def\html{\doignore{html}}
 4059 \def\ifdocbook{\doignore{ifdocbook}}
 4060 \def\ifhtml{\doignore{ifhtml}}
 4061 \def\ifinfo{\doignore{ifinfo}}
 4062 \def\ifnottex{\doignore{ifnottex}}
 4063 \def\ifplaintext{\doignore{ifplaintext}}
 4064 \def\ifxml{\doignore{ifxml}}
 4065 \def\ignore{\doignore{ignore}}
 4066 \def\menu{\doignore{menu}}
 4067 \def\xml{\doignore{xml}}
 4068 
 4069 % Ignore text until a line `@end #1', keeping track of nested conditionals.
 4070 %
 4071 % A count to remember the depth of nesting.
 4072 \newcount\doignorecount
 4073 
 4074 \def\doignore#1{\begingroup
 4075   % Scan in ``verbatim'' mode:
 4076   \obeylines
 4077   \catcode`\@ = \other
 4078   \catcode`\{ = \other
 4079   \catcode`\} = \other
 4080   %
 4081   % Make sure that spaces turn into tokens that match what \doignoretext wants.
 4082   \spaceisspace
 4083   %
 4084   % Count number of #1's that we've seen.
 4085   \doignorecount = 0
 4086   %
 4087   % Swallow text until we reach the matching `@end #1'.
 4088   \dodoignore{#1}%
 4089 }
 4090 
 4091 { \catcode`_=11 % We want to use \_STOP_ which cannot appear in texinfo source.
 4092   \obeylines %
 4093   %
 4094   \gdef\dodoignore#1{%
 4095     % #1 contains the command name as a string, e.g., `ifinfo'.
 4096     %
 4097     % Define a command to find the next `@end #1'.
 4098     \long\def\doignoretext##1^^M@end #1{%
 4099       \doignoretextyyy##1^^M@#1\_STOP_}%
 4100     %
 4101     % And this command to find another #1 command, at the beginning of a
 4102     % line.  (Otherwise, we would consider a line `@c @ifset', for
 4103     % example, to count as an @ifset for nesting.)
 4104     \long\def\doignoretextyyy##1^^M@#1##2\_STOP_{\doignoreyyy{##2}\_STOP_}%
 4105     %
 4106     % And now expand that command.
 4107     \doignoretext ^^M%
 4108   }%
 4109 }
 4110 
 4111 \def\doignoreyyy#1{%
 4112   \def\temp{#1}%
 4113   \ifx\temp\empty           % Nothing found.
 4114     \let\next\doignoretextzzz
 4115   \else                 % Found a nested condition, ...
 4116     \advance\doignorecount by 1
 4117     \let\next\doignoretextyyy       % ..., look for another.
 4118     % If we're here, #1 ends with ^^M\ifinfo (for example).
 4119   \fi
 4120   \next #1% the token \_STOP_ is present just after this macro.
 4121 }
 4122 
 4123 % We have to swallow the remaining "\_STOP_".
 4124 %
 4125 \def\doignoretextzzz#1{%
 4126   \ifnum\doignorecount = 0  % We have just found the outermost @end.
 4127     \let\next\enddoignore
 4128   \else             % Still inside a nested condition.
 4129     \advance\doignorecount by -1
 4130     \let\next\doignoretext      % Look for the next @end.
 4131   \fi
 4132   \next
 4133 }
 4134 
 4135 % Finish off ignored text.
 4136 { \obeylines%
 4137   % Ignore anything after the last `@end #1'; this matters in verbatim
 4138   % environments, where otherwise the newline after an ignored conditional
 4139   % would result in a blank line in the output.
 4140   \gdef\enddoignore#1^^M{\endgroup\ignorespaces}%
 4141 }
 4142 
 4143 
 4144 % @set VAR sets the variable VAR to an empty value.
 4145 % @set VAR REST-OF-LINE sets VAR to the value REST-OF-LINE.
 4146 %
 4147 % Since we want to separate VAR from REST-OF-LINE (which might be
 4148 % empty), we can't just use \parsearg; we have to insert a space of our
 4149 % own to delimit the rest of the line, and then take it out again if we
 4150 % didn't need it.
 4151 % We rely on the fact that \parsearg sets \catcode`\ =10.
 4152 %
 4153 \parseargdef\set{\setyyy#1 \endsetyyy}
 4154 \def\setyyy#1 #2\endsetyyy{%
 4155   {%
 4156     \makevalueexpandable
 4157     \def\temp{#2}%
 4158     \edef\next{\gdef\makecsname{SET#1}}%
 4159     \ifx\temp\empty
 4160       \next{}%
 4161     \else
 4162       \setzzz#2\endsetzzz
 4163     \fi
 4164   }%
 4165 }
 4166 % Remove the trailing space \setxxx inserted.
 4167 \def\setzzz#1 \endsetzzz{\next{#1}}
 4168 
 4169 % @clear VAR clears (i.e., unsets) the variable VAR.
 4170 %
 4171 \parseargdef\clear{%
 4172   {%
 4173     \makevalueexpandable
 4174     \global\expandafter\let\csname SET#1\endcsname=\relax
 4175   }%
 4176 }
 4177 
 4178 % @value{foo} gets the text saved in variable foo.
 4179 \def\value{\begingroup\makevalueexpandable\valuexxx}
 4180 \def\valuexxx#1{\expandablevalue{#1}\endgroup}
 4181 {
 4182   \catcode`\- = \active \catcode`\_ = \active
 4183   %
 4184   \gdef\makevalueexpandable{%
 4185     \let\value = \expandablevalue
 4186     % We don't want these characters active, ...
 4187     \catcode`\-=\other \catcode`\_=\other
 4188     % ..., but we might end up with active ones in the argument if
 4189     % we're called from @code, as @code{@value{foo-bar_}}, though.
 4190     % So \let them to their normal equivalents.
 4191     \let-\normaldash \let_\normalunderscore
 4192   }
 4193 }
 4194 
 4195 % We have this subroutine so that we can handle at least some @value's
 4196 % properly in indexes (we call \makevalueexpandable in \indexdummies).
 4197 % The command has to be fully expandable (if the variable is set), since
 4198 % the result winds up in the index file.  This means that if the
 4199 % variable's value contains other Texinfo commands, it's almost certain
 4200 % it will fail (although perhaps we could fix that with sufficient work
 4201 % to do a one-level expansion on the result, instead of complete).
 4202 %
 4203 \def\expandablevalue#1{%
 4204   \expandafter\ifx\csname SET#1\endcsname\relax
 4205     {[No value for ``#1'']}%
 4206     \message{Variable `#1', used in @value, is not set.}%
 4207   \else
 4208     \csname SET#1\endcsname
 4209   \fi
 4210 }
 4211 
 4212 % @ifset VAR ... @end ifset reads the `...' iff VAR has been defined
 4213 % with @set.
 4214 %
 4215 % To get special treatment of `@end ifset,' call \makeond and the redefine.
 4216 %
 4217 \makecond{ifset}
 4218 \def\ifset{\parsearg{\doifset{\let\next=\ifsetfail}}}
 4219 \def\doifset#1#2{%
 4220   {%
 4221     \makevalueexpandable
 4222     \let\next=\empty
 4223     \expandafter\ifx\csname SET#2\endcsname\relax
 4224       #1% If not set, redefine \next.
 4225     \fi
 4226     \expandafter
 4227   }\next
 4228 }
 4229 \def\ifsetfail{\doignore{ifset}}
 4230 
 4231 % @ifclear VAR ... @end executes the `...' iff VAR has never been
 4232 % defined with @set, or has been undefined with @clear.
 4233 %
 4234 % The `\else' inside the `\doifset' parameter is a trick to reuse the
 4235 % above code: if the variable is not set, do nothing, if it is set,
 4236 % then redefine \next to \ifclearfail.
 4237 %
 4238 \makecond{ifclear}
 4239 \def\ifclear{\parsearg{\doifset{\else \let\next=\ifclearfail}}}
 4240 \def\ifclearfail{\doignore{ifclear}}
 4241 
 4242 % @ifcommandisdefined CMD ... @end executes the `...' if CMD (written
 4243 % without the @) is in fact defined.  We can only feasibly check at the
 4244 % TeX level, so something like `mathcode' is going to considered
 4245 % defined even though it is not a Texinfo command.
 4246 % 
 4247 \makecond{ifcommanddefined}
 4248 \def\ifcommanddefined{\parsearg{\doifcmddefined{\let\next=\ifcmddefinedfail}}}
 4249 %
 4250 \def\doifcmddefined#1#2{{%
 4251     \makevalueexpandable
 4252     \let\next=\empty
 4253     \expandafter\ifx\csname #2\endcsname\relax
 4254       #1% If not defined, \let\next as above.
 4255     \fi
 4256     \expandafter
 4257   }\next
 4258 }
 4259 \def\ifcmddefinedfail{\doignore{ifcommanddefined}}
 4260 
 4261 % @ifcommandnotdefined CMD ... handled similar to @ifclear above.
 4262 \makecond{ifcommandnotdefined}
 4263 \def\ifcommandnotdefined{%
 4264   \parsearg{\doifcmddefined{\else \let\next=\ifcmdnotdefinedfail}}}
 4265 \def\ifcmdnotdefinedfail{\doignore{ifcommandnotdefined}}
 4266 
 4267 % Set the `txicommandconditionals' variable, so documents have a way to
 4268 % test if the @ifcommand...defined conditionals are available.
 4269 \set txicommandconditionals
 4270 
 4271 % @dircategory CATEGORY  -- specify a category of the dir file
 4272 % which this file should belong to.  Ignore this in TeX.
 4273 \let\dircategory=\comment
 4274 
 4275 % @defininfoenclose.
 4276 \let\definfoenclose=\comment
 4277 
 4278 
 4279 \message{indexing,}
 4280 % Index generation facilities
 4281 
 4282 % Define \newwrite to be identical to plain tex's \newwrite
 4283 % except not \outer, so it can be used within macros and \if's.
 4284 \edef\newwrite{\makecsname{ptexnewwrite}}
 4285 
 4286 % \newindex {foo} defines an index named foo.
 4287 % It automatically defines \fooindex such that
 4288 % \fooindex ...rest of line... puts an entry in the index foo.
 4289 % It also defines \fooindfile to be the number of the output channel for
 4290 % the file that accumulates this index.  The file's extension is foo.
 4291 % The name of an index should be no more than 2 characters long
 4292 % for the sake of vms.
 4293 %
 4294 \def\newindex#1{%
 4295   \iflinks
 4296     \expandafter\newwrite \csname#1indfile\endcsname
 4297     \openout \csname#1indfile\endcsname \jobname.#1 % Open the file
 4298   \fi
 4299   \expandafter\xdef\csname#1index\endcsname{%     % Define @#1index
 4300     \noexpand\doindex{#1}}
 4301 }
 4302 
 4303 % @defindex foo  ==  \newindex{foo}
 4304 %
 4305 \def\defindex{\parsearg\newindex}
 4306 
 4307 % Define @defcodeindex, like @defindex except put all entries in @code.
 4308 %
 4309 \def\defcodeindex{\parsearg\newcodeindex}
 4310 %
 4311 \def\newcodeindex#1{%
 4312   \iflinks
 4313     \expandafter\newwrite \csname#1indfile\endcsname
 4314     \openout \csname#1indfile\endcsname \jobname.#1
 4315   \fi
 4316   \expandafter\xdef\csname#1index\endcsname{%
 4317     \noexpand\docodeindex{#1}}%
 4318 }
 4319 
 4320 
 4321 % @synindex foo bar    makes index foo feed into index bar.
 4322 % Do this instead of @defindex foo if you don't want it as a separate index.
 4323 %
 4324 % @syncodeindex foo bar   similar, but put all entries made for index foo
 4325 % inside @code.
 4326 %
 4327 \def\synindex#1 #2 {\dosynindex\doindex{#1}{#2}}
 4328 \def\syncodeindex#1 #2 {\dosynindex\docodeindex{#1}{#2}}
 4329 
 4330 % #1 is \doindex or \docodeindex, #2 the index getting redefined (foo),
 4331 % #3 the target index (bar).
 4332 \def\dosynindex#1#2#3{%
 4333   % Only do \closeout if we haven't already done it, else we'll end up
 4334   % closing the target index.
 4335   \expandafter \ifx\csname donesynindex#2\endcsname \relax
 4336     % The \closeout helps reduce unnecessary open files; the limit on the
 4337     % Acorn RISC OS is a mere 16 files.
 4338     \expandafter\closeout\csname#2indfile\endcsname
 4339     \expandafter\let\csname donesynindex#2\endcsname = 1
 4340   \fi
 4341   % redefine \fooindfile:
 4342   \expandafter\let\expandafter\temp\expandafter=\csname#3indfile\endcsname
 4343   \expandafter\let\csname#2indfile\endcsname=\temp
 4344   % redefine \fooindex:
 4345   \expandafter\xdef\csname#2index\endcsname{\noexpand#1{#3}}%
 4346 }
 4347 
 4348 % Define \doindex, the driver for all \fooindex macros.
 4349 % Argument #1 is generated by the calling \fooindex macro,
 4350 %  and it is "foo", the name of the index.
 4351 
 4352 % \doindex just uses \parsearg; it calls \doind for the actual work.
 4353 % This is because \doind is more useful to call from other macros.
 4354 
 4355 % There is also \dosubind {index}{topic}{subtopic}
 4356 % which makes an entry in a two-level index such as the operation index.
 4357 
 4358 \def\doindex#1{\edef\indexname{#1}\parsearg\singleindexer}
 4359 \def\singleindexer #1{\doind{\indexname}{#1}}
 4360 
 4361 % like the previous two, but they put @code around the argument.
 4362 \def\docodeindex#1{\edef\indexname{#1}\parsearg\singlecodeindexer}
 4363 \def\singlecodeindexer #1{\doind{\indexname}{\code{#1}}}
 4364 
 4365 % Take care of Texinfo commands that can appear in an index entry.
 4366 % Since there are some commands we want to expand, and others we don't,
 4367 % we have to laboriously prevent expansion for those that we don't.
 4368 %
 4369 \def\indexdummies{%
 4370   \escapechar = `\\     % use backslash in output files.
 4371   \def\@{@}% change to @@ when we switch to @ as escape char in index files.
 4372   \def\ {\realbackslash\space }%
 4373   %
 4374   % Need these unexpandable (because we define \tt as a dummy)
 4375   % definitions when @{ or @} appear in index entry text.  Also, more
 4376   % complicated, when \tex is in effect and \{ is a \delimiter again.
 4377   % We can't use \lbracecmd and \rbracecmd because texindex assumes
 4378   % braces and backslashes are used only as delimiters.  Perhaps we
 4379   % should define @lbrace and @rbrace commands a la @comma.
 4380   \def\{{{\tt\char123}}%
 4381   \def\}{{\tt\char125}}%
 4382   %
 4383   % I don't entirely understand this, but when an index entry is
 4384   % generated from a macro call, the \endinput which \scanmacro inserts
 4385   % causes processing to be prematurely terminated.  This is,
 4386   % apparently, because \indexsorttmp is fully expanded, and \endinput
 4387   % is an expandable command.  The redefinition below makes \endinput
 4388   % disappear altogether for that purpose -- although logging shows that
 4389   % processing continues to some further point.  On the other hand, it
 4390   % seems \endinput does not hurt in the printed index arg, since that
 4391   % is still getting written without apparent harm.
 4392   %
 4393   % Sample source (mac-idx3.tex, reported by Graham Percival to
 4394   % help-texinfo, 22may06):
 4395   % @macro funindex {WORD}
 4396   % @findex xyz
 4397   % @end macro
 4398   % ...
 4399   % @funindex commtest
 4400   %
 4401   % The above is not enough to reproduce the bug, but it gives the flavor.
 4402   %
 4403   % Sample whatsit resulting:
 4404   % .@write3{\entry{xyz}{@folio }{@code {xyz@endinput }}}
 4405   %
 4406   % So:
 4407   \let\endinput = \empty
 4408   %
 4409   % Do the redefinitions.
 4410   \commondummies
 4411 }
 4412 
 4413 % For the aux and toc files, @ is the escape character.  So we want to
 4414 % redefine everything using @ as the escape character (instead of
 4415 % \realbackslash, still used for index files).  When everything uses @,
 4416 % this will be simpler.
 4417 %
 4418 \def\atdummies{%
 4419   \def\@{@@}%
 4420   \def\ {@ }%
 4421   \let\{ = \lbraceatcmd
 4422   \let\} = \rbraceatcmd
 4423   %
 4424   % Do the redefinitions.
 4425   \commondummies
 4426   \otherbackslash
 4427 }
 4428 
 4429 % Called from \indexdummies and \atdummies.
 4430 %
 4431 \def\commondummies{%
 4432   %
 4433   % \definedummyword defines \#1 as \string\#1\space, thus effectively
 4434   % preventing its expansion.  This is used only for control words,
 4435   % not control letters, because the \space would be incorrect for
 4436   % control characters, but is needed to separate the control word
 4437   % from whatever follows.
 4438   %
 4439   % For control letters, we have \definedummyletter, which omits the
 4440   % space.
 4441   %
 4442   % These can be used both for control words that take an argument and
 4443   % those that do not.  If it is followed by {arg} in the input, then
 4444   % that will dutifully get written to the index (or wherever).
 4445   %
 4446   \def\definedummyword  ##1{\def##1{\string##1\space}}%
 4447   \def\definedummyletter##1{\def##1{\string##1}}%
 4448   \let\definedummyaccent\definedummyletter
 4449   %
 4450   \commondummiesnofonts
 4451   %
 4452   \definedummyletter\_%
 4453   \definedummyletter\-%
 4454   %
 4455   % Non-English letters.
 4456   \definedummyword\AA
 4457   \definedummyword\AE
 4458   \definedummyword\DH
 4459   \definedummyword\L
 4460   \definedummyword\O
 4461   \definedummyword\OE
 4462   \definedummyword\TH
 4463   \definedummyword\aa
 4464   \definedummyword\ae
 4465   \definedummyword\dh
 4466   \definedummyword\exclamdown
 4467   \definedummyword\l
 4468   \definedummyword\o
 4469   \definedummyword\oe
 4470   \definedummyword\ordf
 4471   \definedummyword\ordm
 4472   \definedummyword\questiondown
 4473   \definedummyword\ss
 4474   \definedummyword\th
 4475   %
 4476   % Although these internal commands shouldn't show up, sometimes they do.
 4477   \definedummyword\bf
 4478   \definedummyword\gtr
 4479   \definedummyword\hat
 4480   \definedummyword\less
 4481   \definedummyword\sf
 4482   \definedummyword\sl
 4483   \definedummyword\tclose
 4484   \definedummyword\tt
 4485   %
 4486   \definedummyword\LaTeX
 4487   \definedummyword\TeX
 4488   %
 4489   % Assorted special characters.
 4490   \definedummyword\arrow
 4491   \definedummyword\bullet
 4492   \definedummyword\comma
 4493   \definedummyword\copyright
 4494   \definedummyword\registeredsymbol
 4495   \definedummyword\dots
 4496   \definedummyword\enddots
 4497   \definedummyword\entrybreak
 4498   \definedummyword\equiv
 4499   \definedummyword\error
 4500   \definedummyword\euro
 4501   \definedummyword\expansion
 4502   \definedummyword\geq
 4503   \definedummyword\guillemetleft
 4504   \definedummyword\guillemetright
 4505   \definedummyword\guilsinglleft
 4506   \definedummyword\guilsinglright
 4507   \definedummyword\lbracechar
 4508   \definedummyword\leq
 4509   \definedummyword\minus
 4510   \definedummyword\ogonek
 4511   \definedummyword\pounds
 4512   \definedummyword\point
 4513   \definedummyword\print
 4514   \definedummyword\quotedblbase
 4515   \definedummyword\quotedblleft
 4516   \definedummyword\quotedblright
 4517   \definedummyword\quoteleft
 4518   \definedummyword\quoteright
 4519   \definedummyword\quotesinglbase
 4520   \definedummyword\rbracechar
 4521   \definedummyword\result
 4522   \definedummyword\textdegree
 4523   %
 4524   % We want to disable all macros so that they are not expanded by \write.
 4525   \macrolist
 4526   %
 4527   \normalturnoffactive
 4528   %
 4529   % Handle some cases of @value -- where it does not contain any
 4530   % (non-fully-expandable) commands.
 4531   \makevalueexpandable
 4532 }
 4533 
 4534 % \commondummiesnofonts: common to \commondummies and \indexnofonts.
 4535 %
 4536 \def\commondummiesnofonts{%
 4537   % Control letters and accents.
 4538   \definedummyletter\!%
 4539   \definedummyaccent\"%
 4540   \definedummyaccent\'%
 4541   \definedummyletter\*%
 4542   \definedummyaccent\,%
 4543   \definedummyletter\.%
 4544   \definedummyletter\/%
 4545   \definedummyletter\:%
 4546   \definedummyaccent\=%
 4547   \definedummyletter\?%
 4548   \definedummyaccent\^%
 4549   \definedummyaccent\`%
 4550   \definedummyaccent\~%
 4551   \definedummyword\u
 4552   \definedummyword\v
 4553   \definedummyword\H
 4554   \definedummyword\dotaccent
 4555   \definedummyword\ogonek
 4556   \definedummyword\ringaccent
 4557   \definedummyword\tieaccent
 4558   \definedummyword\ubaraccent
 4559   \definedummyword\udotaccent
 4560   \definedummyword\dotless
 4561   %
 4562   % Texinfo font commands.
 4563   \definedummyword\b
 4564   \definedummyword\i
 4565   \definedummyword\r
 4566   \definedummyword\sansserif
 4567   \definedummyword\sc
 4568   \definedummyword\slanted
 4569   \definedummyword\t
 4570   %
 4571   % Commands that take arguments.
 4572   \definedummyword\abbr
 4573   \definedummyword\acronym
 4574   \definedummyword\anchor
 4575   \definedummyword\cite
 4576   \definedummyword\code
 4577   \definedummyword\command
 4578   \definedummyword\dfn
 4579   \definedummyword\dmn
 4580   \definedummyword\email
 4581   \definedummyword\emph
 4582   \definedummyword\env
 4583   \definedummyword\file
 4584   \definedummyword\image
 4585   \definedummyword\indicateurl
 4586   \definedummyword\inforef
 4587   \definedummyword\kbd
 4588   \definedummyword\key
 4589   \definedummyword\math
 4590   \definedummyword\option
 4591   \definedummyword\pxref
 4592   \definedummyword\ref
 4593   \definedummyword\samp
 4594   \definedummyword\strong
 4595   \definedummyword\tie
 4596   \definedummyword\uref
 4597   \definedummyword\url
 4598   \definedummyword\var
 4599   \definedummyword\verb
 4600   \definedummyword\w
 4601   \definedummyword\xref
 4602 }
 4603 
 4604 % \indexnofonts is used when outputting the strings to sort the index
 4605 % by, and when constructing control sequence names.  It eliminates all
 4606 % control sequences and just writes whatever the best ASCII sort string
 4607 % would be for a given command (usually its argument).
 4608 %
 4609 \def\indexnofonts{%
 4610   % Accent commands should become @asis.
 4611   \def\definedummyaccent##1{\let##1\asis}%
 4612   % We can just ignore other control letters.
 4613   \def\definedummyletter##1{\let##1\empty}%
 4614   % All control words become @asis by default; overrides below.
 4615   \let\definedummyword\definedummyaccent
 4616   %
 4617   \commondummiesnofonts
 4618   %
 4619   % Don't no-op \tt, since it isn't a user-level command
 4620   % and is used in the definitions of the active chars like <, >, |, etc.
 4621   % Likewise with the other plain tex font commands.
 4622   %\let\tt=\asis
 4623   %
 4624   \def\ { }%
 4625   \def\@{@}%
 4626   \def\_{\normalunderscore}%
 4627   \def\-{}% @- shouldn't affect sorting
 4628   %
 4629   % Unfortunately, texindex is not prepared to handle braces in the
 4630   % content at all.  So for index sorting, we map @{ and @} to strings
 4631   % starting with |, since that ASCII character is between ASCII { and }.
 4632   \def\{{|a}%
 4633   \def\lbracechar{|a}%
 4634   %
 4635   \def\}{|b}%
 4636   \def\rbracechar{|b}%
 4637   %
 4638   % Non-English letters.
 4639   \def\AA{AA}%
 4640   \def\AE{AE}%
 4641   \def\DH{DZZ}%
 4642   \def\L{L}%
 4643   \def\OE{OE}%
 4644   \def\O{O}%
 4645   \def\TH{ZZZ}%
 4646   \def\aa{aa}%
 4647   \def\ae{ae}%
 4648   \def\dh{dzz}%
 4649   \def\exclamdown{!}%
 4650   \def\l{l}%
 4651   \def\oe{oe}%
 4652   \def\ordf{a}%
 4653   \def\ordm{o}%
 4654   \def\o{o}%
 4655   \def\questiondown{?}%
 4656   \def\ss{ss}%
 4657   \def\th{zzz}%
 4658   %
 4659   \def\LaTeX{LaTeX}%
 4660   \def\TeX{TeX}%
 4661   %
 4662   % Assorted special characters.
 4663   % (The following {} will end up in the sort string, but that's ok.)
 4664   \def\arrow{->}%
 4665   \def\bullet{bullet}%
 4666   \def\comma{,}%
 4667   \def\copyright{copyright}%
 4668   \def\dots{...}%
 4669   \def\enddots{...}%
 4670   \def\equiv{==}%
 4671   \def\error{error}%
 4672   \def\euro{euro}%
 4673   \def\expansion{==>}%
 4674   \def\geq{>=}%
 4675   \def\guillemetleft{<<}%
 4676   \def\guillemetright{>>}%
 4677   \def\guilsinglleft{<}%
 4678   \def\guilsinglright{>}%
 4679   \def\leq{<=}%
 4680   \def\minus{-}%
 4681   \def\point{.}%
 4682   \def\pounds{pounds}%
 4683   \def\print{-|}%
 4684   \def\quotedblbase{"}%
 4685   \def\quotedblleft{"}%
 4686   \def\quotedblright{"}%
 4687   \def\quoteleft{`}%
 4688   \def\quoteright{'}%
 4689   \def\quotesinglbase{,}%
 4690   \def\registeredsymbol{R}%
 4691   \def\result{=>}%
 4692   \def\textdegree{o}%
 4693   %
 4694   \expandafter\ifx\csname SETtxiindexlquoteignore\endcsname\relax
 4695   \else \indexlquoteignore \fi
 4696   %
 4697   % We need to get rid of all macros, leaving only the arguments (if present).
 4698   % Of course this is not nearly correct, but it is the best we can do for now.
 4699   % makeinfo does not expand macros in the argument to @deffn, which ends up
 4700   % writing an index entry, and texindex isn't prepared for an index sort entry
 4701   % that starts with \.
 4702   %
 4703   % Since macro invocations are followed by braces, we can just redefine them
 4704   % to take a single TeX argument.  The case of a macro invocation that
 4705   % goes to end-of-line is not handled.
 4706   %
 4707   \macrolist
 4708 }
 4709 
 4710 % Undocumented (for FSFS 2nd ed.): @set txiindexlquoteignore makes us
 4711 % ignore left quotes in the sort term.
 4712 {\catcode`\`=\active
 4713  \gdef\indexlquoteignore{\let`=\empty}}
 4714 
 4715 \let\indexbackslash=0  %overridden during \printindex.
 4716 \let\SETmarginindex=\relax % put index entries in margin (undocumented)?
 4717 
 4718 % Most index entries go through here, but \dosubind is the general case.
 4719 % #1 is the index name, #2 is the entry text.
 4720 \def\doind#1#2{\dosubind{#1}{#2}{}}
 4721 
 4722 % Workhorse for all \fooindexes.
 4723 % #1 is name of index, #2 is stuff to put there, #3 is subentry --
 4724 % empty if called from \doind, as we usually are (the main exception
 4725 % is with most defuns, which call us directly).
 4726 %
 4727 \def\dosubind#1#2#3{%
 4728   \iflinks
 4729   {%
 4730     % Store the main index entry text (including the third arg).
 4731     \toks0 = {#2}%
 4732     % If third arg is present, precede it with a space.
 4733     \def\thirdarg{#3}%
 4734     \ifx\thirdarg\empty \else
 4735       \toks0 = \expandafter{\the\toks0 \space #3}%
 4736     \fi
 4737     %
 4738     \edef\writeto{\csname#1indfile\endcsname}%
 4739     %
 4740     \safewhatsit\dosubindwrite
 4741   }%
 4742   \fi
 4743 }
 4744 
 4745 % Write the entry in \toks0 to the index file:
 4746 %
 4747 \def\dosubindwrite{%
 4748   % Put the index entry in the margin if desired.
 4749   \ifx\SETmarginindex\relax\else
 4750     \insert\margin{\hbox{\vrule height8pt depth3pt width0pt \the\toks0}}%
 4751   \fi
 4752   %
 4753   % Remember, we are within a group.
 4754   \indexdummies % Must do this here, since \bf, etc expand at this stage
 4755   \def\backslashcurfont{\indexbackslash}% \indexbackslash isn't defined now
 4756       % so it will be output as is; and it will print as backslash.
 4757   %
 4758   % Process the index entry with all font commands turned off, to
 4759   % get the string to sort by.
 4760   {\indexnofonts
 4761    \edef\temp{\the\toks0}% need full expansion
 4762    \xdef\indexsorttmp{\temp}%
 4763   }%
 4764   %
 4765   % Set up the complete index entry, with both the sort key and
 4766   % the original text, including any font commands.  We write
 4767   % three arguments to \entry to the .?? file (four in the
 4768   % subentry case), texindex reduces to two when writing the .??s
 4769   % sorted result.
 4770   \edef\temp{%
 4771     \write\writeto{%
 4772       \string\entry{\indexsorttmp}{\noexpand\folio}{\the\toks0}}%
 4773   }%
 4774   \temp
 4775 }
 4776 
 4777 % Take care of unwanted page breaks/skips around a whatsit:
 4778 %
 4779 % If a skip is the last thing on the list now, preserve it
 4780 % by backing up by \lastskip, doing the \write, then inserting
 4781 % the skip again.  Otherwise, the whatsit generated by the
 4782 % \write or \pdfdest will make \lastskip zero.  The result is that
 4783 % sequences like this:
 4784 % @end defun
 4785 % @tindex whatever
 4786 % @defun ...
 4787 % will have extra space inserted, because the \medbreak in the
 4788 % start of the @defun won't see the skip inserted by the @end of
 4789 % the previous defun.
 4790 %
 4791 % But don't do any of this if we're not in vertical mode.  We
 4792 % don't want to do a \vskip and prematurely end a paragraph.
 4793 %
 4794 % Avoid page breaks due to these extra skips, too.
 4795 %
 4796 % But wait, there is a catch there:
 4797 % We'll have to check whether \lastskip is zero skip.  \ifdim is not
 4798 % sufficient for this purpose, as it ignores stretch and shrink parts
 4799 % of the skip.  The only way seems to be to check the textual
 4800 % representation of the skip.
 4801 %
 4802 % The following is almost like \def\zeroskipmacro{0.0pt} except that
 4803 % the ``p'' and ``t'' characters have catcode \other, not 11 (letter).
 4804 %
 4805 \edef\zeroskipmacro{\expandafter\the\csname z@skip\endcsname}
 4806 %
 4807 \newskip\whatsitskip
 4808 \newcount\whatsitpenalty
 4809 %
 4810 % ..., ready, GO:
 4811 %
 4812 \def\safewhatsit#1{\ifhmode
 4813   #1%
 4814  \else
 4815   % \lastskip and \lastpenalty cannot both be nonzero simultaneously.
 4816   \whatsitskip = \lastskip
 4817   \edef\lastskipmacro{\the\lastskip}%
 4818   \whatsitpenalty = \lastpenalty
 4819   %
 4820   % If \lastskip is nonzero, that means the last item was a
 4821   % skip.  And since a skip is discardable, that means this
 4822   % -\whatsitskip glue we're inserting is preceded by a
 4823   % non-discardable item, therefore it is not a potential
 4824   % breakpoint, therefore no \nobreak needed.
 4825   \ifx\lastskipmacro\zeroskipmacro
 4826   \else
 4827     \vskip-\whatsitskip
 4828   \fi
 4829   %
 4830   #1%
 4831   %
 4832   \ifx\lastskipmacro\zeroskipmacro
 4833     % If \lastskip was zero, perhaps the last item was a penalty, and
 4834     % perhaps it was >=10000, e.g., a \nobreak.  In that case, we want
 4835     % to re-insert the same penalty (values >10000 are used for various
 4836     % signals); since we just inserted a non-discardable item, any
 4837     % following glue (such as a \parskip) would be a breakpoint.  For example:
 4838     %   @deffn deffn-whatever
 4839     %   @vindex index-whatever
 4840     %   Description.
 4841     % would allow a break between the index-whatever whatsit
 4842     % and the "Description." paragraph.
 4843     \ifnum\whatsitpenalty>9999 \penalty\whatsitpenalty \fi
 4844   \else
 4845     % On the other hand, if we had a nonzero \lastskip,
 4846     % this make-up glue would be preceded by a non-discardable item
 4847     % (the whatsit from the \write), so we must insert a \nobreak.
 4848     \nobreak\vskip\whatsitskip
 4849   \fi
 4850 \fi}
 4851 
 4852 % The index entry written in the file actually looks like
 4853 %  \entry {sortstring}{page}{topic}
 4854 % or
 4855 %  \entry {sortstring}{page}{topic}{subtopic}
 4856 % The texindex program reads in these files and writes files
 4857 % containing these kinds of lines:
 4858 %  \initial {c}
 4859 %     before the first topic whose initial is c
 4860 %  \entry {topic}{pagelist}
 4861 %     for a topic that is used without subtopics
 4862 %  \primary {topic}
 4863 %     for the beginning of a topic that is used with subtopics
 4864 %  \secondary {subtopic}{pagelist}
 4865 %     for each subtopic.
 4866 
 4867 % Define the user-accessible indexing commands
 4868 % @findex, @vindex, @kindex, @cindex.
 4869 
 4870 \def\findex {\fnindex}
 4871 \def\kindex {\kyindex}
 4872 \def\cindex {\cpindex}
 4873 \def\vindex {\vrindex}
 4874 \def\tindex {\tpindex}
 4875 \def\pindex {\pgindex}
 4876 
 4877 \def\cindexsub {\begingroup\obeylines\cindexsub}
 4878 {\obeylines %
 4879 \gdef\cindexsub "#1" #2^^M{\endgroup %
 4880 \dosubind{cp}{#2}{#1}}}
 4881 
 4882 % Define the macros used in formatting output of the sorted index material.
 4883 
 4884 % @printindex causes a particular index (the ??s file) to get printed.
 4885 % It does not print any chapter heading (usually an @unnumbered).
 4886 %
 4887 \parseargdef\printindex{\begingroup
 4888   \dobreak \chapheadingskip{10000}%
 4889   %
 4890   \smallfonts \rm
 4891   \tolerance = 9500
 4892   \plainfrenchspacing
 4893   \everypar = {}% don't want the \kern\-parindent from indentation suppression.
 4894   %
 4895   % See if the index file exists and is nonempty.
 4896   % Change catcode of @ here so that if the index file contains
 4897   % \initial {@}
 4898   % as its first line, TeX doesn't complain about mismatched braces
 4899   % (because it thinks @} is a control sequence).
 4900   \catcode`\@ = 11
 4901   \openin 1 \jobname.#1s
 4902   \ifeof 1
 4903     % \enddoublecolumns gets confused if there is no text in the index,
 4904     % and it loses the chapter title and the aux file entries for the
 4905     % index.  The easiest way to prevent this problem is to make sure
 4906     % there is some text.
 4907     \putwordIndexNonexistent
 4908   \else
 4909     %
 4910     % If the index file exists but is empty, then \openin leaves \ifeof
 4911     % false.  We have to make TeX try to read something from the file, so
 4912     % it can discover if there is anything in it.
 4913     \read 1 to \temp
 4914     \ifeof 1
 4915       \putwordIndexIsEmpty
 4916     \else
 4917       % Index files are almost Texinfo source, but we use \ as the escape
 4918       % character.  It would be better to use @, but that's too big a change
 4919       % to make right now.
 4920       \def\indexbackslash{\backslashcurfont}%
 4921       \catcode`\\ = 0
 4922       \escapechar = `\\
 4923       \begindoublecolumns
 4924       \input \jobname.#1s
 4925       \enddoublecolumns
 4926     \fi
 4927   \fi
 4928   \closein 1
 4929 \endgroup}
 4930 
 4931 % These macros are used by the sorted index file itself.
 4932 % Change them to control the appearance of the index.
 4933 
 4934 \def\initial#1{{%
 4935   % Some minor font changes for the special characters.
 4936   \let\tentt=\sectt \let\tt=\sectt \let\sf=\sectt
 4937   %
 4938   % Remove any glue we may have, we'll be inserting our own.
 4939   \removelastskip
 4940   %
 4941   % We like breaks before the index initials, so insert a bonus.
 4942   \nobreak
 4943   \vskip 0pt plus 3\baselineskip
 4944   \penalty 0
 4945   \vskip 0pt plus -3\baselineskip
 4946   %
 4947   % Typeset the initial.  Making this add up to a whole number of
 4948   % baselineskips increases the chance of the dots lining up from column
 4949   % to column.  It still won't often be perfect, because of the stretch
 4950   % we need before each entry, but it's better.
 4951   %
 4952   % No shrink because it confuses \balancecolumns.
 4953   \vskip 1.67\baselineskip plus .5\baselineskip
 4954   \leftline{\secbf #1}%
 4955   % Do our best not to break after the initial.
 4956   \nobreak
 4957   \vskip .33\baselineskip plus .1\baselineskip
 4958 }}
 4959 
 4960 % \entry typesets a paragraph consisting of the text (#1), dot leaders, and
 4961 % then page number (#2) flushed to the right margin.  It is used for index
 4962 % and table of contents entries.  The paragraph is indented by \leftskip.
 4963 %
 4964 % A straightforward implementation would start like this:
 4965 %   \def\entry#1#2{...
 4966 % But this freezes the catcodes in the argument, and can cause problems to
 4967 % @code, which sets - active.  This problem was fixed by a kludge---
 4968 % ``-'' was active throughout whole index, but this isn't really right.
 4969 % The right solution is to prevent \entry from swallowing the whole text.
 4970 %                                 --kasal, 21nov03
 4971 \def\entry{%
 4972   \begingroup
 4973     %
 4974     % Start a new paragraph if necessary, so our assignments below can't
 4975     % affect previous text.
 4976     \par
 4977     %
 4978     % Do not fill out the last line with white space.
 4979     \parfillskip = 0in
 4980     %
 4981     % No extra space above this paragraph.
 4982     \parskip = 0in
 4983     %
 4984     % Do not prefer a separate line ending with a hyphen to fewer lines.
 4985     \finalhyphendemerits = 0
 4986     %
 4987     % \hangindent is only relevant when the entry text and page number
 4988     % don't both fit on one line.  In that case, bob suggests starting the
 4989     % dots pretty far over on the line.  Unfortunately, a large
 4990     % indentation looks wrong when the entry text itself is broken across
 4991     % lines.  So we use a small indentation and put up with long leaders.
 4992     %
 4993     % \hangafter is reset to 1 (which is the value we want) at the start
 4994     % of each paragraph, so we need not do anything with that.
 4995     \hangindent = 2em
 4996     %
 4997     % When the entry text needs to be broken, just fill out the first line
 4998     % with blank space.
 4999     \rightskip = 0pt plus1fil
 5000     %
 5001     % A bit of stretch before each entry for the benefit of balancing
 5002     % columns.
 5003     \vskip 0pt plus1pt
 5004     %
 5005     % When reading the text of entry, convert explicit line breaks
 5006     % from @* into spaces.  The user might give these in long section
 5007     % titles, for instance.
 5008     \def\*{\unskip\space\ignorespaces}%
 5009     \def\entrybreak{\hfil\break}%
 5010     %
 5011     % Swallow the left brace of the text (first parameter):
 5012     \afterassignment\doentry
 5013     \let\temp =
 5014 }
 5015 \def\entrybreak{\unskip\space\ignorespaces}%
 5016 \def\doentry{%
 5017     \bgroup % Instead of the swallowed brace.
 5018       \noindent
 5019       \aftergroup\finishentry
 5020       % And now comes the text of the entry.
 5021 }
 5022 \def\finishentry#1{%
 5023     % #1 is the page number.
 5024     %
 5025     % The following is kludged to not output a line of dots in the index if
 5026     % there are no page numbers.  The next person who breaks this will be
 5027     % cursed by a Unix daemon.
 5028     \setbox\boxA = \hbox{#1}%
 5029     \ifdim\wd\boxA = 0pt
 5030       \ %
 5031     \else
 5032       %
 5033       % If we must, put the page number on a line of its own, and fill out
 5034       % this line with blank space.  (The \hfil is overwhelmed with the
 5035       % fill leaders glue in \indexdotfill if the page number does fit.)
 5036       \hfil\penalty50
 5037       \null\nobreak\indexdotfill % Have leaders before the page number.
 5038       %
 5039       % The `\ ' here is removed by the implicit \unskip that TeX does as
 5040       % part of (the primitive) \par.  Without it, a spurious underfull
 5041       % \hbox ensues.
 5042       \ifpdf
 5043     \pdfgettoks#1.%
 5044     \ \the\toksA
 5045       \else
 5046     \ #1%
 5047       \fi
 5048     \fi
 5049     \par
 5050   \endgroup
 5051 }
 5052 
 5053 % Like plain.tex's \dotfill, except uses up at least 1 em.
 5054 \def\indexdotfill{\cleaders
 5055   \hbox{$\mathsurround=0pt \mkern1.5mu.\mkern1.5mu$}\hskip 1em plus 1fill}
 5056 
 5057 \def\primary #1{\line{#1\hfil}}
 5058 
 5059 \newskip\secondaryindent \secondaryindent=0.5cm
 5060 \def\secondary#1#2{{%
 5061   \parfillskip=0in
 5062   \parskip=0in
 5063   \hangindent=1in
 5064   \hangafter=1
 5065   \noindent\hskip\secondaryindent\hbox{#1}\indexdotfill
 5066   \ifpdf
 5067     \pdfgettoks#2.\ \the\toksA % The page number ends the paragraph.
 5068   \else
 5069     #2
 5070   \fi
 5071   \par
 5072 }}
 5073 
 5074 % Define two-column mode, which we use to typeset indexes.
 5075 % Adapted from the TeXbook, page 416, which is to say,
 5076 % the manmac.tex format used to print the TeXbook itself.
 5077 \catcode`\@=11
 5078 
 5079 \newbox\partialpage
 5080 \newdimen\doublecolumnhsize
 5081 
 5082 \def\begindoublecolumns{\begingroup % ended by \enddoublecolumns
 5083   % Grab any single-column material above us.
 5084   \output = {%
 5085     %
 5086     % Here is a possibility not foreseen in manmac: if we accumulate a
 5087     % whole lot of material, we might end up calling this \output
 5088     % routine twice in a row (see the doublecol-lose test, which is
 5089     % essentially a couple of indexes with @setchapternewpage off).  In
 5090     % that case we just ship out what is in \partialpage with the normal
 5091     % output routine.  Generally, \partialpage will be empty when this
 5092     % runs and this will be a no-op.  See the indexspread.tex test case.
 5093     \ifvoid\partialpage \else
 5094       \onepageout{\pagecontents\partialpage}%
 5095     \fi
 5096     %
 5097     \global\setbox\partialpage = \vbox{%
 5098       % Unvbox the main output page.
 5099       \unvbox\PAGE
 5100       \kern-\topskip \kern\baselineskip
 5101     }%
 5102   }%
 5103   \eject % run that output routine to set \partialpage
 5104   %
 5105   % Use the double-column output routine for subsequent pages.
 5106   \output = {\doublecolumnout}%
 5107   %
 5108   % Change the page size parameters.  We could do this once outside this
 5109   % routine, in each of @smallbook, @afourpaper, and the default 8.5x11
 5110   % format, but then we repeat the same computation.  Repeating a couple
 5111   % of assignments once per index is clearly meaningless for the
 5112   % execution time, so we may as well do it in one place.
 5113   %
 5114   % First we halve the line length, less a little for the gutter between
 5115   % the columns.  We compute the gutter based on the line length, so it
 5116   % changes automatically with the paper format.  The magic constant
 5117   % below is chosen so that the gutter has the same value (well, +-<1pt)
 5118   % as it did when we hard-coded it.
 5119   %
 5120   % We put the result in a separate register, \doublecolumhsize, so we
 5121   % can restore it in \pagesofar, after \hsize itself has (potentially)
 5122   % been clobbered.
 5123   %
 5124   \doublecolumnhsize = \hsize
 5125     \advance\doublecolumnhsize by -.04154\hsize
 5126     \divide\doublecolumnhsize by 2
 5127   \hsize = \doublecolumnhsize
 5128   %
 5129   % Double the \vsize as well.  (We don't need a separate register here,
 5130   % since nobody clobbers \vsize.)
 5131   \vsize = 2\vsize
 5132 }
 5133 
 5134 % The double-column output routine for all double-column pages except
 5135 % the last.
 5136 %
 5137 \def\doublecolumnout{%
 5138   \splittopskip=\topskip \splitmaxdepth=\maxdepth
 5139   % Get the available space for the double columns -- the normal
 5140   % (undoubled) page height minus any material left over from the
 5141   % previous page.
 5142   \dimen@ = \vsize
 5143   \divide\dimen@ by 2
 5144   \advance\dimen@ by -\ht\partialpage
 5145   %
 5146   % box0 will be the left-hand column, box2 the right.
 5147   \setbox0=\vsplit255 to\dimen@ \setbox2=\vsplit255 to\dimen@
 5148   \onepageout\pagesofar
 5149   \unvbox255
 5150   \penalty\outputpenalty
 5151 }
 5152 %
 5153 % Re-output the contents of the output page -- any previous material,
 5154 % followed by the two boxes we just split, in box0 and box2.
 5155 \def\pagesofar{%
 5156   \unvbox\partialpage
 5157   %
 5158   \hsize = \doublecolumnhsize
 5159   \wd0=\hsize \wd2=\hsize
 5160   \hbox to\pagewidth{\box0\hfil\box2}%
 5161 }
 5162 %
 5163 % All done with double columns.
 5164 \def\enddoublecolumns{%
 5165   % The following penalty ensures that the page builder is exercised
 5166   % _before_ we change the output routine.  This is necessary in the
 5167   % following situation:
 5168   %
 5169   % The last section of the index consists only of a single entry.
 5170   % Before this section, \pagetotal is less than \pagegoal, so no
 5171   % break occurs before the last section starts.  However, the last
 5172   % section, consisting of \initial and the single \entry, does not
 5173   % fit on the page and has to be broken off.  Without the following
 5174   % penalty the page builder will not be exercised until \eject
 5175   % below, and by that time we'll already have changed the output
 5176   % routine to the \balancecolumns version, so the next-to-last
 5177   % double-column page will be processed with \balancecolumns, which
 5178   % is wrong:  The two columns will go to the main vertical list, with
 5179   % the broken-off section in the recent contributions.  As soon as
 5180   % the output routine finishes, TeX starts reconsidering the page
 5181   % break.  The two columns and the broken-off section both fit on the
 5182   % page, because the two columns now take up only half of the page
 5183   % goal.  When TeX sees \eject from below which follows the final
 5184   % section, it invokes the new output routine that we've set after
 5185   % \balancecolumns below; \onepageout will try to fit the two columns
 5186   % and the final section into the vbox of \pageheight (see
 5187   % \pagebody), causing an overfull box.
 5188   %
 5189   % Note that glue won't work here, because glue does not exercise the
 5190   % page builder, unlike penalties (see The TeXbook, pp. 280-281).
 5191   \penalty0
 5192   %
 5193   \output = {%
 5194     % Split the last of the double-column material.  Leave it on the
 5195     % current page, no automatic page break.
 5196     \balancecolumns
 5197     %
 5198     % If we end up splitting too much material for the current page,
 5199     % though, there will be another page break right after this \output
 5200     % invocation ends.  Having called \balancecolumns once, we do not
 5201     % want to call it again.  Therefore, reset \output to its normal
 5202     % definition right away.  (We hope \balancecolumns will never be
 5203     % called on to balance too much material, but if it is, this makes
 5204     % the output somewhat more palatable.)
 5205     \global\output = {\onepageout{\pagecontents\PAGE}}%
 5206   }%
 5207   \eject
 5208   \endgroup % started in \begindoublecolumns
 5209   %
 5210   % \pagegoal was set to the doubled \vsize above, since we restarted
 5211   % the current page.  We're now back to normal single-column
 5212   % typesetting, so reset \pagegoal to the normal \vsize (after the
 5213   % \endgroup where \vsize got restored).
 5214   \pagegoal = \vsize
 5215 }
 5216 %
 5217 % Called at the end of the double column material.
 5218 \def\balancecolumns{%
 5219   \setbox0 = \vbox{\unvbox255}% like \box255 but more efficient, see p.120.
 5220   \dimen@ = \ht0
 5221   \advance\dimen@ by \topskip
 5222   \advance\dimen@ by-\baselineskip
 5223   \divide\dimen@ by 2 % target to split to
 5224   %debug\message{final 2-column material height=\the\ht0, target=\the\dimen@.}%
 5225   \splittopskip = \topskip
 5226   % Loop until we get a decent breakpoint.
 5227   {%
 5228     \vbadness = 10000
 5229     \loop
 5230       \global\setbox3 = \copy0
 5231       \global\setbox1 = \vsplit3 to \dimen@
 5232     \ifdim\ht3>\dimen@
 5233       \global\advance\dimen@ by 1pt
 5234     \repeat
 5235   }%
 5236   %debug\message{split to \the\dimen@, column heights: \the\ht1, \the\ht3.}%
 5237   \setbox0=\vbox to\dimen@{\unvbox1}%
 5238   \setbox2=\vbox to\dimen@{\unvbox3}%
 5239   %
 5240   \pagesofar
 5241 }
 5242 \catcode`\@ = \other
 5243 
 5244 
 5245 \message{sectioning,}
 5246 % Chapters, sections, etc.
 5247 
 5248 % Let's start with @part.
 5249 \outer\parseargdef\part{\partzzz{#1}}
 5250 \def\partzzz#1{%
 5251   \chapoddpage
 5252   \null
 5253   \vskip.3\vsize  % move it down on the page a bit
 5254   \begingroup
 5255     \noindent \titlefonts\rmisbold #1\par % the text
 5256     \let\lastnode=\empty      % no node to associate with
 5257     \writetocentry{part}{#1}{}% but put it in the toc
 5258     \headingsoff              % no headline or footline on the part page
 5259     \chapoddpage
 5260   \endgroup
 5261 }
 5262 
 5263 % \unnumberedno is an oxymoron.  But we count the unnumbered
 5264 % sections so that we can refer to them unambiguously in the pdf
 5265 % outlines by their "section number".  We avoid collisions with chapter
 5266 % numbers by starting them at 10000.  (If a document ever has 10000
 5267 % chapters, we're in trouble anyway, I'm sure.)
 5268 \newcount\unnumberedno \unnumberedno = 10000
 5269 \newcount\chapno
 5270 \newcount\secno        \secno=0
 5271 \newcount\subsecno     \subsecno=0
 5272 \newcount\subsubsecno  \subsubsecno=0
 5273 
 5274 % This counter is funny since it counts through charcodes of letters A, B, ...
 5275 \newcount\appendixno  \appendixno = `\@
 5276 %
 5277 % \def\appendixletter{\char\the\appendixno}
 5278 % We do the following ugly conditional instead of the above simple
 5279 % construct for the sake of pdftex, which needs the actual
 5280 % letter in the expansion, not just typeset.
 5281 %
 5282 \def\appendixletter{%
 5283   \ifnum\appendixno=`A A%
 5284   \else\ifnum\appendixno=`B B%
 5285   \else\ifnum\appendixno=`C C%
 5286   \else\ifnum\appendixno=`D D%
 5287   \else\ifnum\appendixno=`E E%
 5288   \else\ifnum\appendixno=`F F%
 5289   \else\ifnum\appendixno=`G G%
 5290   \else\ifnum\appendixno=`H H%
 5291   \else\ifnum\appendixno=`I I%
 5292   \else\ifnum\appendixno=`J J%
 5293   \else\ifnum\appendixno=`K K%
 5294   \else\ifnum\appendixno=`L L%
 5295   \else\ifnum\appendixno=`M M%
 5296   \else\ifnum\appendixno=`N N%
 5297   \else\ifnum\appendixno=`O O%
 5298   \else\ifnum\appendixno=`P P%
 5299   \else\ifnum\appendixno=`Q Q%
 5300   \else\ifnum\appendixno=`R R%
 5301   \else\ifnum\appendixno=`S S%
 5302   \else\ifnum\appendixno=`T T%
 5303   \else\ifnum\appendixno=`U U%
 5304   \else\ifnum\appendixno=`V V%
 5305   \else\ifnum\appendixno=`W W%
 5306   \else\ifnum\appendixno=`X X%
 5307   \else\ifnum\appendixno=`Y Y%
 5308   \else\ifnum\appendixno=`Z Z%
 5309   % The \the is necessary, despite appearances, because \appendixletter is
 5310   % expanded while writing the .toc file.  \char\appendixno is not
 5311   % expandable, thus it is written literally, thus all appendixes come out
 5312   % with the same letter (or @) in the toc without it.
 5313   \else\char\the\appendixno
 5314   \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
 5315   \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi}
 5316 
 5317 % Each @chapter defines these (using marks) as the number+name, number
 5318 % and name of the chapter.  Page headings and footings can use
 5319 % these.  @section does likewise.
 5320 \def\thischapter{}
 5321 \def\thischapternum{}
 5322 \def\thischaptername{}
 5323 \def\thissection{}
 5324 \def\thissectionnum{}
 5325 \def\thissectionname{}
 5326 
 5327 \newcount\absseclevel % used to calculate proper heading level
 5328 \newcount\secbase\secbase=0 % @raisesections/@lowersections modify this count
 5329 
 5330 % @raisesections: treat @section as chapter, @subsection as section, etc.
 5331 \def\raisesections{\global\advance\secbase by -1}
 5332 \let\up=\raisesections % original BFox name
 5333 
 5334 % @lowersections: treat @chapter as section, @section as subsection, etc.
 5335 \def\lowersections{\global\advance\secbase by 1}
 5336 \let\down=\lowersections % original BFox name
 5337 
 5338 % we only have subsub.
 5339 \chardef\maxseclevel = 3
 5340 %
 5341 % A numbered section within an unnumbered changes to unnumbered too.
 5342 % To achieve this, remember the "biggest" unnum. sec. we are currently in:
 5343 \chardef\unnlevel = \maxseclevel
 5344 %
 5345 % Trace whether the current chapter is an appendix or not:
 5346 % \chapheadtype is "N" or "A", unnumbered chapters are ignored.
 5347 \def\chapheadtype{N}
 5348 
 5349 % Choose a heading macro
 5350 % #1 is heading type
 5351 % #2 is heading level
 5352 % #3 is text for heading
 5353 \def\genhead#1#2#3{%
 5354   % Compute the abs. sec. level:
 5355   \absseclevel=#2
 5356   \advance\absseclevel by \secbase
 5357   % Make sure \absseclevel doesn't fall outside the range:
 5358   \ifnum \absseclevel < 0
 5359     \absseclevel = 0
 5360   \else
 5361     \ifnum \absseclevel > 3
 5362       \absseclevel = 3
 5363     \fi
 5364   \fi
 5365   % The heading type:
 5366   \def\headtype{#1}%
 5367   \if \headtype U%
 5368     \ifnum \absseclevel < \unnlevel
 5369       \chardef\unnlevel = \absseclevel
 5370     \fi
 5371   \else
 5372     % Check for appendix sections:
 5373     \ifnum \absseclevel = 0
 5374       \edef\chapheadtype{\headtype}%
 5375     \else
 5376       \if \headtype A\if \chapheadtype N%
 5377     \errmessage{@appendix... within a non-appendix chapter}%
 5378       \fi\fi
 5379     \fi
 5380     % Check for numbered within unnumbered:
 5381     \ifnum \absseclevel > \unnlevel
 5382       \def\headtype{U}%
 5383     \else
 5384       \chardef\unnlevel = 3
 5385     \fi
 5386   \fi
 5387   % Now print the heading:
 5388   \if \headtype U%
 5389     \ifcase\absseclevel
 5390     \unnumberedzzz{#3}%
 5391     \or \unnumberedseczzz{#3}%
 5392     \or \unnumberedsubseczzz{#3}%
 5393     \or \unnumberedsubsubseczzz{#3}%
 5394     \fi
 5395   \else
 5396     \if \headtype A%
 5397       \ifcase\absseclevel
 5398       \appendixzzz{#3}%
 5399       \or \appendixsectionzzz{#3}%
 5400       \or \appendixsubseczzz{#3}%
 5401       \or \appendixsubsubseczzz{#3}%
 5402       \fi
 5403     \else
 5404       \ifcase\absseclevel
 5405       \chapterzzz{#3}%
 5406       \or \seczzz{#3}%
 5407       \or \numberedsubseczzz{#3}%
 5408       \or \numberedsubsubseczzz{#3}%
 5409       \fi
 5410     \fi
 5411   \fi
 5412   \suppressfirstparagraphindent
 5413 }
 5414 
 5415 % an interface:
 5416 \def\numhead{\genhead N}
 5417 \def\apphead{\genhead A}
 5418 \def\unnmhead{\genhead U}
 5419 
 5420 % @chapter, @appendix, @unnumbered.  Increment top-level counter, reset
 5421 % all lower-level sectioning counters to zero.
 5422 %
 5423 % Also set \chaplevelprefix, which we prepend to @float sequence numbers
 5424 % (e.g., figures), q.v.  By default (before any chapter), that is empty.
 5425 \let\chaplevelprefix = \empty
 5426 %
 5427 \outer\parseargdef\chapter{\numhead0{#1}} % normally numhead0 calls chapterzzz
 5428 \def\chapterzzz#1{%
 5429   % section resetting is \global in case the chapter is in a group, such
 5430   % as an @include file.
 5431   \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
 5432     \global\advance\chapno by 1
 5433   %
 5434   % Used for \float.
 5435   \gdef\chaplevelprefix{\the\chapno.}%
 5436   \resetallfloatnos
 5437   %
 5438   % \putwordChapter can contain complex things in translations.
 5439   \toks0=\expandafter{\putwordChapter}%
 5440   \message{\the\toks0 \space \the\chapno}%
 5441   %
 5442   % Write the actual heading.
 5443   \chapmacro{#1}{Ynumbered}{\the\chapno}%
 5444   %
 5445   % So @section and the like are numbered underneath this chapter.
 5446   \global\let\section = \numberedsec
 5447   \global\let\subsection = \numberedsubsec
 5448   \global\let\subsubsection = \numberedsubsubsec
 5449 }
 5450 
 5451 \outer\parseargdef\appendix{\apphead0{#1}} % normally calls appendixzzz
 5452 %
 5453 \def\appendixzzz#1{%
 5454   \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
 5455     \global\advance\appendixno by 1
 5456   \gdef\chaplevelprefix{\appendixletter.}%
 5457   \resetallfloatnos
 5458   %
 5459   % \putwordAppendix can contain complex things in translations.
 5460   \toks0=\expandafter{\putwordAppendix}%
 5461   \message{\the\toks0 \space \appendixletter}%
 5462   %
 5463   \chapmacro{#1}{Yappendix}{\appendixletter}%
 5464   %
 5465   \global\let\section = \appendixsec
 5466   \global\let\subsection = \appendixsubsec
 5467   \global\let\subsubsection = \appendixsubsubsec
 5468 }
 5469 
 5470 % normally unnmhead0 calls unnumberedzzz:
 5471 \outer\parseargdef\unnumbered{\unnmhead0{#1}}
 5472 \def\unnumberedzzz#1{%
 5473   \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
 5474     \global\advance\unnumberedno by 1
 5475   %
 5476   % Since an unnumbered has no number, no prefix for figures.
 5477   \global\let\chaplevelprefix = \empty
 5478   \resetallfloatnos
 5479   %
 5480   % This used to be simply \message{#1}, but TeX fully expands the
 5481   % argument to \message.  Therefore, if #1 contained @-commands, TeX
 5482   % expanded them.  For example, in `@unnumbered The @cite{Book}', TeX
 5483   % expanded @cite (which turns out to cause errors because \cite is meant
 5484   % to be executed, not expanded).
 5485   %
 5486   % Anyway, we don't want the fully-expanded definition of @cite to appear
 5487   % as a result of the \message, we just want `@cite' itself.  We use
 5488   % \the<toks register> to achieve this: TeX expands \the<toks> only once,
 5489   % simply yielding the contents of <toks register>.  (We also do this for
 5490   % the toc entries.)
 5491   \toks0 = {#1}%
 5492   \message{(\the\toks0)}%
 5493   %
 5494   \chapmacro{#1}{Ynothing}{\the\unnumberedno}%
 5495   %
 5496   \global\let\section = \unnumberedsec
 5497   \global\let\subsection = \unnumberedsubsec
 5498   \global\let\subsubsection = \unnumberedsubsubsec
 5499 }
 5500 
 5501 % @centerchap is like @unnumbered, but the heading is centered.
 5502 \outer\parseargdef\centerchap{%
 5503   % Well, we could do the following in a group, but that would break
 5504   % an assumption that \chapmacro is called at the outermost level.
 5505   % Thus we are safer this way:     --kasal, 24feb04
 5506   \let\centerparametersmaybe = \centerparameters
 5507   \unnmhead0{#1}%
 5508   \let\centerparametersmaybe = \relax
 5509 }
 5510 
 5511 % @top is like @unnumbered.
 5512 \let\top\unnumbered
 5513 
 5514 % Sections.
 5515 % 
 5516 \outer\parseargdef\numberedsec{\numhead1{#1}} % normally calls seczzz
 5517 \def\seczzz#1{%
 5518   \global\subsecno=0 \global\subsubsecno=0  \global\advance\secno by 1
 5519   \sectionheading{#1}{sec}{Ynumbered}{\the\chapno.\the\secno}%
 5520 }
 5521 
 5522 % normally calls appendixsectionzzz:
 5523 \outer\parseargdef\appendixsection{\apphead1{#1}}
 5524 \def\appendixsectionzzz#1{%
 5525   \global\subsecno=0 \global\subsubsecno=0  \global\advance\secno by 1
 5526   \sectionheading{#1}{sec}{Yappendix}{\appendixletter.\the\secno}%
 5527 }
 5528 \let\appendixsec\appendixsection
 5529 
 5530 % normally calls unnumberedseczzz:
 5531 \outer\parseargdef\unnumberedsec{\unnmhead1{#1}}
 5532 \def\unnumberedseczzz#1{%
 5533   \global\subsecno=0 \global\subsubsecno=0  \global\advance\secno by 1
 5534   \sectionheading{#1}{sec}{Ynothing}{\the\unnumberedno.\the\secno}%
 5535 }
 5536 
 5537 % Subsections.
 5538 % 
 5539 % normally calls numberedsubseczzz:
 5540 \outer\parseargdef\numberedsubsec{\numhead2{#1}}
 5541 \def\numberedsubseczzz#1{%
 5542   \global\subsubsecno=0  \global\advance\subsecno by 1
 5543   \sectionheading{#1}{subsec}{Ynumbered}{\the\chapno.\the\secno.\the\subsecno}%
 5544 }
 5545 
 5546 % normally calls appendixsubseczzz:
 5547 \outer\parseargdef\appendixsubsec{\apphead2{#1}}
 5548 \def\appendixsubseczzz#1{%
 5549   \global\subsubsecno=0  \global\advance\subsecno by 1
 5550   \sectionheading{#1}{subsec}{Yappendix}%
 5551                  {\appendixletter.\the\secno.\the\subsecno}%
 5552 }
 5553 
 5554 % normally calls unnumberedsubseczzz:
 5555 \outer\parseargdef\unnumberedsubsec{\unnmhead2{#1}}
 5556 \def\unnumberedsubseczzz#1{%
 5557   \global\subsubsecno=0  \global\advance\subsecno by 1
 5558   \sectionheading{#1}{subsec}{Ynothing}%
 5559                  {\the\unnumberedno.\the\secno.\the\subsecno}%
 5560 }
 5561 
 5562 % Subsubsections.
 5563 % 
 5564 % normally numberedsubsubseczzz:
 5565 \outer\parseargdef\numberedsubsubsec{\numhead3{#1}}
 5566 \def\numberedsubsubseczzz#1{%
 5567   \global\advance\subsubsecno by 1
 5568   \sectionheading{#1}{subsubsec}{Ynumbered}%
 5569                  {\the\chapno.\the\secno.\the\subsecno.\the\subsubsecno}%
 5570 }
 5571 
 5572 % normally appendixsubsubseczzz:
 5573 \outer\parseargdef\appendixsubsubsec{\apphead3{#1}}
 5574 \def\appendixsubsubseczzz#1{%
 5575   \global\advance\subsubsecno by 1
 5576   \sectionheading{#1}{subsubsec}{Yappendix}%
 5577                  {\appendixletter.\the\secno.\the\subsecno.\the\subsubsecno}%
 5578 }
 5579 
 5580 % normally unnumberedsubsubseczzz:
 5581 \outer\parseargdef\unnumberedsubsubsec{\unnmhead3{#1}}
 5582 \def\unnumberedsubsubseczzz#1{%
 5583   \global\advance\subsubsecno by 1
 5584   \sectionheading{#1}{subsubsec}{Ynothing}%
 5585                  {\the\unnumberedno.\the\secno.\the\subsecno.\the\subsubsecno}%
 5586 }
 5587 
 5588 % These macros control what the section commands do, according
 5589 % to what kind of chapter we are in (ordinary, appendix, or unnumbered).
 5590 % Define them by default for a numbered chapter.
 5591 \let\section = \numberedsec
 5592 \let\subsection = \numberedsubsec
 5593 \let\subsubsection = \numberedsubsubsec
 5594 
 5595 % Define @majorheading, @heading and @subheading
 5596 
 5597 \def\majorheading{%
 5598   {\advance\chapheadingskip by 10pt \chapbreak }%
 5599   \parsearg\chapheadingzzz
 5600 }
 5601 
 5602 \def\chapheading{\chapbreak \parsearg\chapheadingzzz}
 5603 \def\chapheadingzzz#1{%
 5604   \vbox{\chapfonts \raggedtitlesettings #1\par}%
 5605   \nobreak\bigskip \nobreak
 5606   \suppressfirstparagraphindent
 5607 }
 5608 
 5609 % @heading, @subheading, @subsubheading.
 5610 \parseargdef\heading{\sectionheading{#1}{sec}{Yomitfromtoc}{}
 5611   \suppressfirstparagraphindent}
 5612 \parseargdef\subheading{\sectionheading{#1}{subsec}{Yomitfromtoc}{}
 5613   \suppressfirstparagraphindent}
 5614 \parseargdef\subsubheading{\sectionheading{#1}{subsubsec}{Yomitfromtoc}{}
 5615   \suppressfirstparagraphindent}
 5616 
 5617 % These macros generate a chapter, section, etc. heading only
 5618 % (including whitespace, linebreaking, etc. around it),
 5619 % given all the information in convenient, parsed form.
 5620 
 5621 % Args are the skip and penalty (usually negative)
 5622 \def\dobreak#1#2{\par\ifdim\lastskip<#1\removelastskip\penalty#2\vskip#1\fi}
 5623 
 5624 % Parameter controlling skip before chapter headings (if needed)
 5625 \newskip\chapheadingskip
 5626 
 5627 % Define plain chapter starts, and page on/off switching for it.
 5628 \def\chapbreak{\dobreak \chapheadingskip {-4000}}
 5629 \def\chappager{\par\vfill\supereject}
 5630 % Because \domark is called before \chapoddpage, the filler page will
 5631 % get the headings for the next chapter, which is wrong.  But we don't
 5632 % care -- we just disable all headings on the filler page.
 5633 \def\chapoddpage{%
 5634   \chappager
 5635   \ifodd\pageno \else
 5636     \begingroup
 5637       \headingsoff
 5638       \null
 5639       \chappager
 5640     \endgroup
 5641   \fi
 5642 }
 5643 
 5644 \def\setchapternewpage #1 {\csname CHAPPAG#1\endcsname}
 5645 
 5646 \def\CHAPPAGoff{%
 5647 \global\let\contentsalignmacro = \chappager
 5648 \global\let\pchapsepmacro=\chapbreak
 5649 \global\let\pagealignmacro=\chappager}
 5650 
 5651 \def\CHAPPAGon{%
 5652 \global\let\contentsalignmacro = \chappager
 5653 \global\let\pchapsepmacro=\chappager
 5654 \global\let\pagealignmacro=\chappager
 5655 \global\def\HEADINGSon{\HEADINGSsingle}}
 5656 
 5657 \def\CHAPPAGodd{%
 5658 \global\let\contentsalignmacro = \chapoddpage
 5659 \global\let\pchapsepmacro=\chapoddpage
 5660 \global\let\pagealignmacro=\chapoddpage
 5661 \global\def\HEADINGSon{\HEADINGSdouble}}
 5662 
 5663 \CHAPPAGon
 5664 
 5665 % Chapter opening.
 5666 %
 5667 % #1 is the text, #2 is the section type (Ynumbered, Ynothing,
 5668 % Yappendix, Yomitfromtoc), #3 the chapter number.
 5669 %
 5670 % To test against our argument.
 5671 \def\Ynothingkeyword{Ynothing}
 5672 \def\Yomitfromtockeyword{Yomitfromtoc}
 5673 \def\Yappendixkeyword{Yappendix}
 5674 %
 5675 \def\chapmacro#1#2#3{%
 5676   % Insert the first mark before the heading break (see notes for \domark).
 5677   \let\prevchapterdefs=\lastchapterdefs
 5678   \let\prevsectiondefs=\lastsectiondefs
 5679   \gdef\lastsectiondefs{\gdef\thissectionname{}\gdef\thissectionnum{}%
 5680                         \gdef\thissection{}}%
 5681   %
 5682   \def\temptype{#2}%
 5683   \ifx\temptype\Ynothingkeyword
 5684     \gdef\lastchapterdefs{\gdef\thischaptername{#1}\gdef\thischapternum{}%
 5685                           \gdef\thischapter{\thischaptername}}%
 5686   \else\ifx\temptype\Yomitfromtockeyword
 5687     \gdef\lastchapterdefs{\gdef\thischaptername{#1}\gdef\thischapternum{}%
 5688                           \gdef\thischapter{}}%
 5689   \else\ifx\temptype\Yappendixkeyword
 5690     \toks0={#1}%
 5691     \xdef\lastchapterdefs{%
 5692       \gdef\noexpand\thischaptername{\the\toks0}%
 5693       \gdef\noexpand\thischapternum{\appendixletter}%
 5694       % \noexpand\putwordAppendix avoids expanding indigestible
 5695       % commands in some of the translations.
 5696       \gdef\noexpand\thischapter{\noexpand\putwordAppendix{}
 5697                                  \noexpand\thischapternum:
 5698                                  \noexpand\thischaptername}%
 5699     }%
 5700   \else
 5701     \toks0={#1}%
 5702     \xdef\lastchapterdefs{%
 5703       \gdef\noexpand\thischaptername{\the\toks0}%
 5704       \gdef\noexpand\thischapternum{\the\chapno}%
 5705       % \noexpand\putwordChapter avoids expanding indigestible
 5706       % commands in some of the translations.
 5707       \gdef\noexpand\thischapter{\noexpand\putwordChapter{}
 5708                                  \noexpand\thischapternum:
 5709                                  \noexpand\thischaptername}%
 5710     }%
 5711   \fi\fi\fi
 5712   %
 5713   % Output the mark.  Pass it through \safewhatsit, to take care of
 5714   % the preceding space.
 5715   \safewhatsit\domark
 5716   %
 5717   % Insert the chapter heading break.
 5718   \pchapsepmacro
 5719   %
 5720   % Now the second mark, after the heading break.  No break points
 5721   % between here and the heading.
 5722   \let\prevchapterdefs=\lastchapterdefs
 5723   \let\prevsectiondefs=\lastsectiondefs
 5724   \domark
 5725   %
 5726   {%
 5727     \chapfonts \rmisbold
 5728     %
 5729     % Have to define \lastsection before calling \donoderef, because the
 5730     % xref code eventually uses it.  On the other hand, it has to be called
 5731     % after \pchapsepmacro, or the headline will change too soon.
 5732     \gdef\lastsection{#1}%
 5733     %
 5734     % Only insert the separating space if we have a chapter/appendix
 5735     % number, and don't print the unnumbered ``number''.
 5736     \ifx\temptype\Ynothingkeyword
 5737       \setbox0 = \hbox{}%
 5738       \def\toctype{unnchap}%
 5739     \else\ifx\temptype\Yomitfromtockeyword
 5740       \setbox0 = \hbox{}% contents like unnumbered, but no toc entry
 5741       \def\toctype{omit}%
 5742     \else\ifx\temptype\Yappendixkeyword
 5743       \setbox0 = \hbox{\putwordAppendix{} #3\enspace}%
 5744       \def\toctype{app}%
 5745     \else
 5746       \setbox0 = \hbox{#3\enspace}%
 5747       \def\toctype{numchap}%
 5748     \fi\fi\fi
 5749     %
 5750     % Write the toc entry for this chapter.  Must come before the
 5751     % \donoderef, because we include the current node name in the toc
 5752     % entry, and \donoderef resets it to empty.
 5753     \writetocentry{\toctype}{#1}{#3}%
 5754     %
 5755     % For pdftex, we have to write out the node definition (aka, make
 5756     % the pdfdest) after any page break, but before the actual text has
 5757     % been typeset.  If the destination for the pdf outline is after the
 5758     % text, then jumping from the outline may wind up with the text not
 5759     % being visible, for instance under high magnification.
 5760     \donoderef{#2}%
 5761     %
 5762     % Typeset the actual heading.
 5763     \nobreak % Avoid page breaks at the interline glue.
 5764     \vbox{\raggedtitlesettings \hangindent=\wd0 \centerparametersmaybe
 5765           \unhbox0 #1\par}%
 5766   }%
 5767   \nobreak\bigskip % no page break after a chapter title
 5768   \nobreak
 5769 }
 5770 
 5771 % @centerchap -- centered and unnumbered.
 5772 \let\centerparametersmaybe = \relax
 5773 \def\centerparameters{%
 5774   \advance\rightskip by 3\rightskip
 5775   \leftskip = \rightskip
 5776   \parfillskip = 0pt
 5777 }
 5778 
 5779 
 5780 % I don't think this chapter style is supported any more, so I'm not
 5781 % updating it with the new noderef stuff.  We'll see.  --karl, 11aug03.
 5782 %
 5783 \def\setchapterstyle #1 {\csname CHAPF#1\endcsname}
 5784 %
 5785 \def\unnchfopen #1{%
 5786   \chapoddpage
 5787   \vbox{\chapfonts \raggedtitlesettings #1\par}%
 5788   \nobreak\bigskip\nobreak
 5789 }
 5790 \def\chfopen #1#2{\chapoddpage {\chapfonts
 5791 \vbox to 3in{\vfil \hbox to\hsize{\hfil #2} \hbox to\hsize{\hfil #1} \vfil}}%
 5792 \par\penalty 5000 %
 5793 }
 5794 \def\centerchfopen #1{%
 5795   \chapoddpage
 5796   \vbox{\chapfonts \raggedtitlesettings \hfill #1\hfill}%
 5797   \nobreak\bigskip \nobreak
 5798 }
 5799 \def\CHAPFopen{%
 5800   \global\let\chapmacro=\chfopen
 5801   \global\let\centerchapmacro=\centerchfopen}
 5802 
 5803 
 5804 % Section titles.  These macros combine the section number parts and
 5805 % call the generic \sectionheading to do the printing.
 5806 %
 5807 \newskip\secheadingskip
 5808 \def\secheadingbreak{\dobreak \secheadingskip{-1000}}
 5809 
 5810 % Subsection titles.
 5811 \newskip\subsecheadingskip
 5812 \def\subsecheadingbreak{\dobreak \subsecheadingskip{-500}}
 5813 
 5814 % Subsubsection titles.
 5815 \def\subsubsecheadingskip{\subsecheadingskip}
 5816 \def\subsubsecheadingbreak{\subsecheadingbreak}
 5817 
 5818 
 5819 % Print any size, any type, section title.
 5820 %
 5821 % #1 is the text, #2 is the section level (sec/subsec/subsubsec), #3 is
 5822 % the section type for xrefs (Ynumbered, Ynothing, Yappendix), #4 is the
 5823 % section number.
 5824 %
 5825 \def\seckeyword{sec}
 5826 %
 5827 \def\sectionheading#1#2#3#4{%
 5828   {%
 5829     \checkenv{}% should not be in an environment.
 5830     %
 5831     % Switch to the right set of fonts.
 5832     \csname #2fonts\endcsname \rmisbold
 5833     %
 5834     \def\sectionlevel{#2}%
 5835     \def\temptype{#3}%
 5836     %
 5837     % Insert first mark before the heading break (see notes for \domark).
 5838     \let\prevsectiondefs=\lastsectiondefs
 5839     \ifx\temptype\Ynothingkeyword
 5840       \ifx\sectionlevel\seckeyword
 5841         \gdef\lastsectiondefs{\gdef\thissectionname{#1}\gdef\thissectionnum{}%
 5842                               \gdef\thissection{\thissectionname}}%
 5843       \fi
 5844     \else\ifx\temptype\Yomitfromtockeyword
 5845       % Don't redefine \thissection.
 5846     \else\ifx\temptype\Yappendixkeyword
 5847       \ifx\sectionlevel\seckeyword
 5848         \toks0={#1}%
 5849         \xdef\lastsectiondefs{%
 5850           \gdef\noexpand\thissectionname{\the\toks0}%
 5851           \gdef\noexpand\thissectionnum{#4}%
 5852           % \noexpand\putwordSection avoids expanding indigestible
 5853           % commands in some of the translations.
 5854           \gdef\noexpand\thissection{\noexpand\putwordSection{}
 5855                                      \noexpand\thissectionnum:
 5856                                      \noexpand\thissectionname}%
 5857         }%
 5858       \fi
 5859     \else
 5860       \ifx\sectionlevel\seckeyword
 5861         \toks0={#1}%
 5862         \xdef\lastsectiondefs{%
 5863           \gdef\noexpand\thissectionname{\the\toks0}%
 5864           \gdef\noexpand\thissectionnum{#4}%
 5865           % \noexpand\putwordSection avoids expanding indigestible
 5866           % commands in some of the translations.
 5867           \gdef\noexpand\thissection{\noexpand\putwordSection{}
 5868                                      \noexpand\thissectionnum:
 5869                                      \noexpand\thissectionname}%
 5870         }%
 5871       \fi
 5872     \fi\fi\fi
 5873     %
 5874     % Go into vertical mode.  Usually we'll already be there, but we
 5875     % don't want the following whatsit to end up in a preceding paragraph
 5876     % if the document didn't happen to have a blank line.
 5877     \par
 5878     %
 5879     % Output the mark.  Pass it through \safewhatsit, to take care of
 5880     % the preceding space.
 5881     \safewhatsit\domark
 5882     %
 5883     % Insert space above the heading.
 5884     \csname #2headingbreak\endcsname
 5885     %
 5886     % Now the second mark, after the heading break.  No break points
 5887     % between here and the heading.
 5888     \let\prevsectiondefs=\lastsectiondefs
 5889     \domark
 5890     %
 5891     % Only insert the space after the number if we have a section number.
 5892     \ifx\temptype\Ynothingkeyword
 5893       \setbox0 = \hbox{}%
 5894       \def\toctype{unn}%
 5895       \gdef\lastsection{#1}%
 5896     \else\ifx\temptype\Yomitfromtockeyword
 5897       % for @headings -- no section number, don't include in toc,
 5898       % and don't redefine \lastsection.
 5899       \setbox0 = \hbox{}%
 5900       \def\toctype{omit}%
 5901       \let\sectionlevel=\empty
 5902     \else\ifx\temptype\Yappendixkeyword
 5903       \setbox0 = \hbox{#4\enspace}%
 5904       \def\toctype{app}%
 5905       \gdef\lastsection{#1}%
 5906     \else
 5907       \setbox0 = \hbox{#4\enspace}%
 5908       \def\toctype{num}%
 5909       \gdef\lastsection{#1}%
 5910     \fi\fi\fi
 5911     %
 5912     % Write the toc entry (before \donoderef).  See comments in \chapmacro.
 5913     \writetocentry{\toctype\sectionlevel}{#1}{#4}%
 5914     %
 5915     % Write the node reference (= pdf destination for pdftex).
 5916     % Again, see comments in \chapmacro.
 5917     \donoderef{#3}%
 5918     %
 5919     % Interline glue will be inserted when the vbox is completed.
 5920     % That glue will be a valid breakpoint for the page, since it'll be
 5921     % preceded by a whatsit (usually from the \donoderef, or from the
 5922     % \writetocentry if there was no node).  We don't want to allow that
 5923     % break, since then the whatsits could end up on page n while the
 5924     % section is on page n+1, thus toc/etc. are wrong.  Debian bug 276000.
 5925     \nobreak
 5926     %
 5927     % Output the actual section heading.
 5928     \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \ptexraggedright
 5929           \hangindent=\wd0  % zero if no section number
 5930           \unhbox0 #1}%
 5931   }%
 5932   % Add extra space after the heading -- half of whatever came above it.
 5933   % Don't allow stretch, though.
 5934   \kern .5 \csname #2headingskip\endcsname
 5935   %
 5936   % Do not let the kern be a potential breakpoint, as it would be if it
 5937   % was followed by glue.
 5938   \nobreak
 5939   %
 5940   % We'll almost certainly start a paragraph next, so don't let that
 5941   % glue accumulate.  (Not a breakpoint because it's preceded by a
 5942   % discardable item.)  However, when a paragraph is not started next
 5943   % (\startdefun, \cartouche, \center, etc.), this needs to be wiped out
 5944   % or the negative glue will cause weirdly wrong output, typically
 5945   % obscuring the section heading with something else.
 5946   \vskip-\parskip
 5947   %
 5948   % This is so the last item on the main vertical list is a known
 5949   % \penalty > 10000, so \startdefun, etc., can recognize the situation
 5950   % and do the needful.
 5951   \penalty 10001
 5952 }
 5953 
 5954 
 5955 \message{toc,}
 5956 % Table of contents.
 5957 \newwrite\tocfile
 5958 
 5959 % Write an entry to the toc file, opening it if necessary.
 5960 % Called from @chapter, etc.
 5961 %
 5962 % Example usage: \writetocentry{sec}{Section Name}{\the\chapno.\the\secno}
 5963 % We append the current node name (if any) and page number as additional
 5964 % arguments for the \{chap,sec,...}entry macros which will eventually
 5965 % read this.  The node name is used in the pdf outlines as the
 5966 % destination to jump to.
 5967 %
 5968 % We open the .toc file for writing here instead of at @setfilename (or
 5969 % any other fixed time) so that @contents can be anywhere in the document.
 5970 % But if #1 is `omit', then we don't do anything.  This is used for the
 5971 % table of contents chapter openings themselves.
 5972 %
 5973 \newif\iftocfileopened
 5974 \def\omitkeyword{omit}%
 5975 %
 5976 \def\writetocentry#1#2#3{%
 5977   \edef\writetoctype{#1}%
 5978   \ifx\writetoctype\omitkeyword \else
 5979     \iftocfileopened\else
 5980       \immediate\openout\tocfile = \jobname.toc
 5981       \global\tocfileopenedtrue
 5982     \fi
 5983     %
 5984     \iflinks
 5985       {\atdummies
 5986        \edef\temp{%
 5987          \write\tocfile{@#1entry{#2}{#3}{\lastnode}{\noexpand\folio}}}%
 5988        \temp
 5989       }%
 5990     \fi
 5991   \fi
 5992   %
 5993   % Tell \shipout to create a pdf destination on each page, if we're
 5994   % writing pdf.  These are used in the table of contents.  We can't
 5995   % just write one on every page because the title pages are numbered
 5996   % 1 and 2 (the page numbers aren't printed), and so are the first
 5997   % two pages of the document.  Thus, we'd have two destinations named
 5998   % `1', and two named `2'.
 5999   \ifpdf \global\pdfmakepagedesttrue \fi
 6000 }
 6001 
 6002 
 6003 % These characters do not print properly in the Computer Modern roman
 6004 % fonts, so we must take special care.  This is more or less redundant
 6005 % with the Texinfo input format setup at the end of this file.
 6006 %
 6007 \def\activecatcodes{%
 6008   \catcode`\"=\active
 6009   \catcode`\$=\active
 6010   \catcode`\<=\active
 6011   \catcode`\>=\active
 6012   \catcode`\\=\active
 6013   \catcode`\^=\active
 6014   \catcode`\_=\active
 6015   \catcode`\|=\active
 6016   \catcode`\~=\active
 6017 }
 6018 
 6019 
 6020 % Read the toc file, which is essentially Texinfo input.
 6021 \def\readtocfile{%
 6022   \setupdatafile
 6023   \activecatcodes
 6024   \input \tocreadfilename
 6025 }
 6026 
 6027 \newskip\contentsrightmargin \contentsrightmargin=1in
 6028 \newcount\savepageno
 6029 \newcount\lastnegativepageno \lastnegativepageno = -1
 6030 
 6031 % Prepare to read what we've written to \tocfile.
 6032 %
 6033 \def\startcontents#1{%
 6034   % If @setchapternewpage on, and @headings double, the contents should
 6035   % start on an odd page, unlike chapters.  Thus, we maintain
 6036   % \contentsalignmacro in parallel with \pagealignmacro.
 6037   % From: Torbjorn Granlund <tege@matematik.su.se>
 6038   \contentsalignmacro
 6039   \immediate\closeout\tocfile
 6040   %
 6041   % Don't need to put `Contents' or `Short Contents' in the headline.
 6042   % It is abundantly clear what they are.
 6043   \chapmacro{#1}{Yomitfromtoc}{}%
 6044   %
 6045   \savepageno = \pageno
 6046   \begingroup                  % Set up to handle contents files properly.
 6047     \raggedbottom              % Worry more about breakpoints than the bottom.
 6048     \advance\hsize by -\contentsrightmargin % Don't use the full line length.
 6049     %
 6050     % Roman numerals for page numbers.
 6051     \ifnum \pageno>0 \global\pageno = \lastnegativepageno \fi
 6052 }
 6053 
 6054 % redefined for the two-volume lispref.  We always output on
 6055 % \jobname.toc even if this is redefined.
 6056 %
 6057 \def\tocreadfilename{\jobname.toc}
 6058 
 6059 % Normal (long) toc.
 6060 %
 6061 \def\contents{%
 6062   \startcontents{\putwordTOC}%
 6063     \openin 1 \tocreadfilename\space
 6064     \ifeof 1 \else
 6065       \readtocfile
 6066     \fi
 6067     \vfill \eject
 6068     \contentsalignmacro % in case @setchapternewpage odd is in effect
 6069     \ifeof 1 \else
 6070       \pdfmakeoutlines
 6071     \fi
 6072     \closein 1
 6073   \endgroup
 6074   \lastnegativepageno = \pageno
 6075   \global\pageno = \savepageno
 6076 }
 6077 
 6078 % And just the chapters.
 6079 \def\summarycontents{%
 6080   \startcontents{\putwordShortTOC}%
 6081     %
 6082     \let\partentry = \shortpartentry
 6083     \let\numchapentry = \shortchapentry
 6084     \let\appentry = \shortchapentry
 6085     \let\unnchapentry = \shortunnchapentry
 6086     % We want a true roman here for the page numbers.
 6087     \secfonts
 6088     \let\rm=\shortcontrm \let\bf=\shortcontbf
 6089     \let\sl=\shortcontsl \let\tt=\shortconttt
 6090     \rm
 6091     \hyphenpenalty = 10000
 6092     \advance\baselineskip by 1pt % Open it up a little.
 6093     \def\numsecentry##1##2##3##4{}
 6094     \let\appsecentry = \numsecentry
 6095     \let\unnsecentry = \numsecentry
 6096     \let\numsubsecentry = \numsecentry
 6097     \let\appsubsecentry = \numsecentry
 6098     \let\unnsubsecentry = \numsecentry
 6099     \let\numsubsubsecentry = \numsecentry
 6100     \let\appsubsubsecentry = \numsecentry
 6101     \let\unnsubsubsecentry = \numsecentry
 6102     \openin 1 \tocreadfilename\space
 6103     \ifeof 1 \else
 6104       \readtocfile
 6105     \fi
 6106     \closein 1
 6107     \vfill \eject
 6108     \contentsalignmacro % in case @setchapternewpage odd is in effect
 6109   \endgroup
 6110   \lastnegativepageno = \pageno
 6111   \global\pageno = \savepageno
 6112 }
 6113 \let\shortcontents = \summarycontents
 6114 
 6115 % Typeset the label for a chapter or appendix for the short contents.
 6116 % The arg is, e.g., `A' for an appendix, or `3' for a chapter.
 6117 %
 6118 \def\shortchaplabel#1{%
 6119   % This space should be enough, since a single number is .5em, and the
 6120   % widest letter (M) is 1em, at least in the Computer Modern fonts.
 6121   % But use \hss just in case.
 6122   % (This space doesn't include the extra space that gets added after
 6123   % the label; that gets put in by \shortchapentry above.)
 6124   %
 6125   % We'd like to right-justify chapter numbers, but that looks strange
 6126   % with appendix letters.  And right-justifying numbers and
 6127   % left-justifying letters looks strange when there is less than 10
 6128   % chapters.  Have to read the whole toc once to know how many chapters
 6129   % there are before deciding ...
 6130   \hbox to 1em{#1\hss}%
 6131 }
 6132 
 6133 % These macros generate individual entries in the table of contents.
 6134 % The first argument is the chapter or section name.
 6135 % The last argument is the page number.
 6136 % The arguments in between are the chapter number, section number, ...
 6137 
 6138 % Parts, in the main contents.  Replace the part number, which doesn't
 6139 % exist, with an empty box.  Let's hope all the numbers have the same width.
 6140 % Also ignore the page number, which is conventionally not printed.
 6141 \def\numeralbox{\setbox0=\hbox{8}\hbox to \wd0{\hfil}}
 6142 \def\partentry#1#2#3#4{\dochapentry{\numeralbox\labelspace#1}{}}
 6143 %
 6144 % Parts, in the short toc.
 6145 \def\shortpartentry#1#2#3#4{%
 6146   \penalty-300
 6147   \vskip.5\baselineskip plus.15\baselineskip minus.1\baselineskip
 6148   \shortchapentry{{\bf #1}}{\numeralbox}{}{}%
 6149 }
 6150 
 6151 % Chapters, in the main contents.
 6152 \def\numchapentry#1#2#3#4{\dochapentry{#2\labelspace#1}{#4}}
 6153 %
 6154 % Chapters, in the short toc.
 6155 % See comments in \dochapentry re vbox and related settings.
 6156 \def\shortchapentry#1#2#3#4{%
 6157   \tocentry{\shortchaplabel{#2}\labelspace #1}{\doshortpageno\bgroup#4\egroup}%
 6158 }
 6159 
 6160 % Appendices, in the main contents.
 6161 % Need the word Appendix, and a fixed-size box.
 6162 %
 6163 \def\appendixbox#1{%
 6164   % We use M since it's probably the widest letter.
 6165   \setbox0 = \hbox{\putwordAppendix{} M}%
 6166   \hbox to \wd0{\putwordAppendix{} #1\hss}}
 6167 %
 6168 \def\appentry#1#2#3#4{\dochapentry{\appendixbox{#2}\labelspace#1}{#4}}
 6169 
 6170 % Unnumbered chapters.
 6171 \def\unnchapentry#1#2#3#4{\dochapentry{#1}{#4}}
 6172 \def\shortunnchapentry#1#2#3#4{\tocentry{#1}{\doshortpageno\bgroup#4\egroup}}
 6173 
 6174 % Sections.
 6175 \def\numsecentry#1#2#3#4{\dosecentry{#2\labelspace#1}{#4}}
 6176 \let\appsecentry=\numsecentry
 6177 \def\unnsecentry#1#2#3#4{\dosecentry{#1}{#4}}
 6178 
 6179 % Subsections.
 6180 \def\numsubsecentry#1#2#3#4{\dosubsecentry{#2\labelspace#1}{#4}}
 6181 \let\appsubsecentry=\numsubsecentry
 6182 \def\unnsubsecentry#1#2#3#4{\dosubsecentry{#1}{#4}}
 6183 
 6184 % And subsubsections.
 6185 \def\numsubsubsecentry#1#2#3#4{\dosubsubsecentry{#2\labelspace#1}{#4}}
 6186 \let\appsubsubsecentry=\numsubsubsecentry
 6187 \def\unnsubsubsecentry#1#2#3#4{\dosubsubsecentry{#1}{#4}}
 6188 
 6189 % This parameter controls the indentation of the various levels.
 6190 % Same as \defaultparindent.
 6191 \newdimen\tocindent \tocindent = 15pt
 6192 
 6193 % Now for the actual typesetting. In all these, #1 is the text and #2 is the
 6194 % page number.
 6195 %
 6196 % If the toc has to be broken over pages, we want it to be at chapters
 6197 % if at all possible; hence the \penalty.
 6198 \def\dochapentry#1#2{%
 6199    \penalty-300 \vskip1\baselineskip plus.33\baselineskip minus.25\baselineskip
 6200    \begingroup
 6201      \chapentryfonts
 6202      \tocentry{#1}{\dopageno\bgroup#2\egroup}%
 6203    \endgroup
 6204    \nobreak\vskip .25\baselineskip plus.1\baselineskip
 6205 }
 6206 
 6207 \def\dosecentry#1#2{\begingroup
 6208   \secentryfonts \leftskip=\tocindent
 6209   \tocentry{#1}{\dopageno\bgroup#2\egroup}%
 6210 \endgroup}
 6211 
 6212 \def\dosubsecentry#1#2{\begingroup
 6213   \subsecentryfonts \leftskip=2\tocindent
 6214   \tocentry{#1}{\dopageno\bgroup#2\egroup}%
 6215 \endgroup}
 6216 
 6217 \def\dosubsubsecentry#1#2{\begingroup
 6218   \subsubsecentryfonts \leftskip=3\tocindent
 6219   \tocentry{#1}{\dopageno\bgroup#2\egroup}%
 6220 \endgroup}
 6221 
 6222 % We use the same \entry macro as for the index entries.
 6223 \let\tocentry = \entry
 6224 
 6225 % Space between chapter (or whatever) number and the title.
 6226 \def\labelspace{\hskip1em \relax}
 6227 
 6228 \def\dopageno#1{{\rm #1}}
 6229 \def\doshortpageno#1{{\rm #1}}
 6230 
 6231 \def\chapentryfonts{\secfonts \rm}
 6232 \def\secentryfonts{\textfonts}
 6233 \def\subsecentryfonts{\textfonts}
 6234 \def\subsubsecentryfonts{\textfonts}
 6235 
 6236 
 6237 \message{environments,}
 6238 % @foo ... @end foo.
 6239 
 6240 % @tex ... @end tex    escapes into raw TeX temporarily.
 6241 % One exception: @ is still an escape character, so that @end tex works.
 6242 % But \@ or @@ will get a plain @ character.
 6243 
 6244 \envdef\tex{%
 6245   \setupmarkupstyle{tex}%
 6246   \catcode `\\=0 \catcode `\{=1 \catcode `\}=2
 6247   \catcode `\$=3 \catcode `\&=4 \catcode `\#=6
 6248   \catcode `\^=7 \catcode `\_=8 \catcode `\~=\active \let~=\tie
 6249   \catcode `\%=14
 6250   \catcode `\+=\other
 6251   \catcode `\"=\other
 6252   \catcode `\|=\other
 6253   \catcode `\<=\other
 6254   \catcode `\>=\other
 6255   \catcode`\`=\other
 6256   \catcode`\'=\other
 6257   \escapechar=`\\
 6258   %
 6259   % ' is active in math mode (mathcode"8000).  So reset it, and all our
 6260   % other math active characters (just in case), to plain's definitions.
 6261   \mathactive
 6262   %
 6263   \let\b=\ptexb
 6264   \let\bullet=\ptexbullet
 6265   \let\c=\ptexc
 6266   \let\,=\ptexcomma
 6267   \let\.=\ptexdot
 6268   \let\dots=\ptexdots
 6269   \let\equiv=\ptexequiv
 6270   \let\!=\ptexexclam
 6271   \let\i=\ptexi
 6272