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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 (a] 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 (a] 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 (a] 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 (a] 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   \let\indent=\ptexindent
   6273   \let\noindent=\ptexnoindent
   6274   \let\{=\ptexlbrace
   6275   \let\+=\tabalign
   6276   \let\}=\ptexrbrace
   6277   \let\/=\ptexslash
   6278   \let\*=\ptexstar
   6279   \let\t=\ptext
   6280   \expandafter \let\csname top\endcsname=\ptextop  % outer
   6281   \let\frenchspacing=\plainfrenchspacing
   6282   %
   6283   \def\endldots{\mathinner{\ldots\ldots\ldots\ldots}}%
   6284   \def\enddots{\relax\ifmmode\endldots\else$\mathsurround=0pt \endldots\,$\fi}%
   6285   \def\@{@}%
   6286 }
   6287 % There is no need to define \Etex.
   6288 
   6289 % Define @lisp ... @end lisp.
   6290 % @lisp environment forms a group so it can rebind things,
   6291 % including the definition of @end lisp (which normally is erroneous).
   6292 
   6293 % Amount to narrow the margins by for @lisp.
   6294 \newskip\lispnarrowing \lispnarrowing=0.4in
   6295 
   6296 % This is the definition that ^^M gets inside @lisp, @example, and other
   6297 % such environments.  \null is better than a space, since it doesn't
   6298 % have any width.
   6299 \def\lisppar{\null\endgraf}
   6300 
   6301 % This space is always present above and below environments.
   6302 \newskip\envskipamount \envskipamount = 0pt
   6303 
   6304 % Make spacing and below environment symmetrical.  We use \parskip here
   6305 % to help in doing that, since in @example-like environments \parskip
   6306 % is reset to zero; thus the \afterenvbreak inserts no space -- but the
   6307 % start of the next paragraph will insert \parskip.
   6308 %
   6309 \def\aboveenvbreak{{%
   6310   % =10000 instead of <10000 because of a special case in \itemzzz and
   6311   % \sectionheading, q.v.
   6312   \ifnum \lastpenalty=10000 \else
   6313     \advance\envskipamount by \parskip
   6314     \endgraf
   6315     \ifdim\lastskip<\envskipamount
   6316       \removelastskip
   6317       % it's not a good place to break if the last penalty was \nobreak
   6318       % or better ...
   6319       \ifnum\lastpenalty<10000 \penalty-50 \fi
   6320       \vskip\envskipamount
   6321     \fi
   6322   \fi
   6323 }}
   6324 
   6325 \let\afterenvbreak = \aboveenvbreak
   6326 
   6327 % \nonarrowing is a flag.  If "set", @lisp etc don't narrow margins; it will
   6328 % also clear it, so that its embedded environments do the narrowing again.
   6329 \let\nonarrowing=\relax
   6330 
   6331 % @cartouche ... @end cartouche: draw rectangle w/rounded corners around
   6332 % environment contents.
   6333 \font\circle=lcircle10
   6334 \newdimen\circthick
   6335 \newdimen\cartouter\newdimen\cartinner
   6336 \newskip\normbskip\newskip\normpskip\newskip\normlskip
   6337 \circthick=\fontdimen8\circle
   6338 %
   6339 \def\ctl{{\circle\char'013\hskip -6pt}}% 6pt from pl file: 1/2charwidth
   6340 \def\ctr{{\hskip 6pt\circle\char'010}}
   6341 \def\cbl{{\circle\char'012\hskip -6pt}}
   6342 \def\cbr{{\hskip 6pt\circle\char'011}}
   6343 \def\carttop{\hbox to \cartouter{\hskip\lskip
   6344         \ctl\leaders\hrule height\circthick\hfil\ctr
   6345         \hskip\rskip}}
   6346 \def\cartbot{\hbox to \cartouter{\hskip\lskip
   6347         \cbl\leaders\hrule height\circthick\hfil\cbr
   6348         \hskip\rskip}}
   6349 %
   6350 \newskip\lskip\newskip\rskip
   6351 
   6352 \envdef\cartouche{%
   6353   \ifhmode\par\fi  % can't be in the midst of a paragraph.
   6354   \startsavinginserts
   6355   \lskip=\leftskip \rskip=\rightskip
   6356   \leftskip=0pt\rightskip=0pt % we want these *outside*.
   6357   \cartinner=\hsize \advance\cartinner by-\lskip
   6358   \advance\cartinner by-\rskip
   6359   \cartouter=\hsize
   6360   \advance\cartouter by 18.4pt	% allow for 3pt kerns on either
   6361 				% side, and for 6pt waste from
   6362 				% each corner char, and rule thickness
   6363   \normbskip=\baselineskip \normpskip=\parskip \normlskip=\lineskip
   6364   % Flag to tell @lisp, etc., not to narrow margin.
   6365   \let\nonarrowing = t%
   6366   %
   6367   % If this cartouche directly follows a sectioning command, we need the
   6368   % \parskip glue (backspaced over by default) or the cartouche can
   6369   % collide with the section heading.
   6370   \ifnum\lastpenalty>10000 \vskip\parskip \penalty\lastpenalty \fi
   6371   %
   6372   \vbox\bgroup
   6373       \baselineskip=0pt\parskip=0pt\lineskip=0pt
   6374       \carttop
   6375       \hbox\bgroup
   6376 	  \hskip\lskip
   6377 	  \vrule\kern3pt
   6378 	  \vbox\bgroup
   6379 	      \kern3pt
   6380 	      \hsize=\cartinner
   6381 	      \baselineskip=\normbskip
   6382 	      \lineskip=\normlskip
   6383 	      \parskip=\normpskip
   6384 	      \vskip -\parskip
   6385 	      \comment % For explanation, see the end of def\group.
   6386 }
   6387 \def\Ecartouche{%
   6388               \ifhmode\par\fi
   6389 	      \kern3pt
   6390 	  \egroup
   6391 	  \kern3pt\vrule
   6392 	  \hskip\rskip
   6393       \egroup
   6394       \cartbot
   6395   \egroup
   6396   \checkinserts
   6397 }
   6398 
   6399 
   6400 % This macro is called at the beginning of all the @example variants,
   6401 % inside a group.
   6402 \newdimen\nonfillparindent
   6403 \def\nonfillstart{%
   6404   \aboveenvbreak
   6405   \hfuzz = 12pt % Don't be fussy
   6406   \sepspaces % Make spaces be word-separators rather than space tokens.
   6407   \let\par = \lisppar % don't ignore blank lines
   6408   \obeylines % each line of input is a line of output
   6409   \parskip = 0pt
   6410   % Turn off paragraph indentation but redefine \indent to emulate
   6411   % the normal \indent.
   6412   \nonfillparindent=\parindent
   6413   \parindent = 0pt
   6414   \let\indent\nonfillindent
   6415   %
   6416   \emergencystretch = 0pt % don't try to avoid overfull boxes
   6417   \ifx\nonarrowing\relax
   6418     \advance \leftskip by \lispnarrowing
   6419     \exdentamount=\lispnarrowing
   6420   \else
   6421     \let\nonarrowing = \relax
   6422   \fi
   6423   \let\exdent=\nofillexdent
   6424 }
   6425 
   6426 \begingroup
   6427 \obeyspaces
   6428 % We want to swallow spaces (but not other tokens) after the fake
   6429 % @indent in our nonfill-environments, where spaces are normally
   6430 % active and set to @tie, resulting in them not being ignored after
   6431 % @indent.
   6432 \gdef\nonfillindent{\futurelet\temp\nonfillindentcheck}%
   6433 \gdef\nonfillindentcheck{%
   6434 \ifx\temp %
   6435 \expandafter\nonfillindentgobble%
   6436 \else%
   6437 \leavevmode\nonfillindentbox%
   6438 \fi%
   6439 }%
   6440 \endgroup
   6441 \def\nonfillindentgobble#1{\nonfillindent}
   6442 \def\nonfillindentbox{\hbox to \nonfillparindent{\hss}}
   6443 
   6444 % If you want all examples etc. small: @set dispenvsize small.
   6445 % If you want even small examples the full size: @set dispenvsize nosmall.
   6446 % This affects the following displayed environments:
   6447 %    @example, @display, @format, @lisp
   6448 %
   6449 \def\smallword{small}
   6450 \def\nosmallword{nosmall}
   6451 \let\SETdispenvsize\relax
   6452 \def\setnormaldispenv{%
   6453   \ifx\SETdispenvsize\smallword
   6454     % end paragraph for sake of leading, in case document has no blank
   6455     % line.  This is redundant with what happens in \aboveenvbreak, but
   6456     % we need to do it before changing the fonts, and it's inconvenient
   6457     % to change the fonts afterward.
   6458     \ifnum \lastpenalty=10000 \else \endgraf \fi
   6459     \smallexamplefonts \rm
   6460   \fi
   6461 }
   6462 \def\setsmalldispenv{%
   6463   \ifx\SETdispenvsize\nosmallword
   6464   \else
   6465     \ifnum \lastpenalty=10000 \else \endgraf \fi
   6466     \smallexamplefonts \rm
   6467   \fi
   6468 }
   6469 
   6470 % We often define two environments, @foo and @smallfoo.
   6471 % Let's do it in one command.  #1 is the env name, #2 the definition.
   6472 \def\makedispenvdef#1#2{%
   6473   \expandafter\envdef\csname#1\endcsname {\setnormaldispenv #2}%
   6474   \expandafter\envdef\csname small#1\endcsname {\setsmalldispenv #2}%
   6475   \expandafter\let\csname E#1\endcsname \afterenvbreak
   6476   \expandafter\let\csname Esmall#1\endcsname \afterenvbreak
   6477 }
   6478 
   6479 % Define two environment synonyms (#1 and #2) for an environment.
   6480 \def\maketwodispenvdef#1#2#3{%
   6481   \makedispenvdef{#1}{#3}%
   6482   \makedispenvdef{#2}{#3}%
   6483 }
   6484 %
   6485 % @lisp: indented, narrowed, typewriter font;
   6486 % @example: same as @lisp.
   6487 %
   6488 % @smallexample and @smalllisp: use smaller fonts.
   6489 % Originally contributed by Pavel@xerox.
   6490 %
   6491 \maketwodispenvdef{lisp}{example}{%
   6492   \nonfillstart
   6493   \tt\setupmarkupstyle{example}%
   6494   \let\kbdfont = \kbdexamplefont % Allow @kbd to do something special.
   6495   \gobble % eat return
   6496 }
   6497 % @display/@smalldisplay: same as @lisp except keep current font.
   6498 %
   6499 \makedispenvdef{display}{%
   6500   \nonfillstart
   6501   \gobble
   6502 }
   6503 
   6504 % @format/@smallformat: same as @display except don't narrow margins.
   6505 %
   6506 \makedispenvdef{format}{%
   6507   \let\nonarrowing = t%
   6508   \nonfillstart
   6509   \gobble
   6510 }
   6511 
   6512 % @flushleft: same as @format, but doesn't obey \SETdispenvsize.
   6513 \envdef\flushleft{%
   6514   \let\nonarrowing = t%
   6515   \nonfillstart
   6516   \gobble
   6517 }
   6518 \let\Eflushleft = \afterenvbreak
   6519 
   6520 % @flushright.
   6521 %
   6522 \envdef\flushright{%
   6523   \let\nonarrowing = t%
   6524   \nonfillstart
   6525   \advance\leftskip by 0pt plus 1fill\relax
   6526   \gobble
   6527 }
   6528 \let\Eflushright = \afterenvbreak
   6529 
   6530 
   6531 % @raggedright does more-or-less normal line breaking but no right
   6532 % justification.  From plain.tex.
   6533 \envdef\raggedright{%
   6534   \rightskip0pt plus2em \spaceskip.3333em \xspaceskip.5em\relax
   6535 }
   6536 \let\Eraggedright\par
   6537 
   6538 \envdef\raggedleft{%
   6539   \parindent=0pt \leftskip0pt plus2em
   6540   \spaceskip.3333em \xspaceskip.5em \parfillskip=0pt
   6541   \hbadness=10000 % Last line will usually be underfull, so turn off
   6542                   % badness reporting.
   6543 }
   6544 \let\Eraggedleft\par
   6545 
   6546 \envdef\raggedcenter{%
   6547   \parindent=0pt \rightskip0pt plus1em \leftskip0pt plus1em
   6548   \spaceskip.3333em \xspaceskip.5em \parfillskip=0pt
   6549   \hbadness=10000 % Last line will usually be underfull, so turn off
   6550                   % badness reporting.
   6551 }
   6552 \let\Eraggedcenter\par
   6553 
   6554 
   6555 % @quotation does normal linebreaking (hence we can't use \nonfillstart)
   6556 % and narrows the margins.  We keep \parskip nonzero in general, since
   6557 % we're doing normal filling.  So, when using \aboveenvbreak and
   6558 % \afterenvbreak, temporarily make \parskip 0.
   6559 %
   6560 \makedispenvdef{quotation}{\quotationstart}
   6561 %
   6562 \def\quotationstart{%
   6563   \indentedblockstart % same as \indentedblock, but increase right margin too.
   6564   \ifx\nonarrowing\relax
   6565     \advance\rightskip by \lispnarrowing
   6566   \fi
   6567   \parsearg\quotationlabel
   6568 }
   6569 
   6570 % We have retained a nonzero parskip for the environment, since we're
   6571 % doing normal filling.
   6572 %
   6573 \def\Equotation{%
   6574   \par
   6575   \ifx\quotationauthor\thisisundefined\else
   6576     % indent a bit.
   6577     \leftline{\kern 2\leftskip \sl ---\quotationauthor}%
   6578   \fi
   6579   {\parskip=0pt \afterenvbreak}%
   6580 }
   6581 \def\Esmallquotation{\Equotation}
   6582 
   6583 % If we're given an argument, typeset it in bold with a colon after.
   6584 \def\quotationlabel#1{%
   6585   \def\temp{#1}%
   6586   \ifx\temp\empty \else
   6587     {\bf #1: }%
   6588   \fi
   6589 }
   6590 
   6591 % @indentedblock is like @quotation, but indents only on the left and
   6592 % has no optional argument.
   6593 % 
   6594 \makedispenvdef{indentedblock}{\indentedblockstart}
   6595 %
   6596 \def\indentedblockstart{%
   6597   {\parskip=0pt \aboveenvbreak}% because \aboveenvbreak inserts \parskip
   6598   \parindent=0pt
   6599   %
   6600   % @cartouche defines \nonarrowing to inhibit narrowing at next level down.
   6601   \ifx\nonarrowing\relax
   6602     \advance\leftskip by \lispnarrowing
   6603     \exdentamount = \lispnarrowing
   6604   \else
   6605     \let\nonarrowing = \relax
   6606   \fi
   6607 }
   6608 
   6609 % Keep a nonzero parskip for the environment, since we're doing normal filling.
   6610 %
   6611 \def\Eindentedblock{%
   6612   \par
   6613   {\parskip=0pt \afterenvbreak}%
   6614 }
   6615 \def\Esmallindentedblock{\Eindentedblock}
   6616 
   6617 
   6618 % LaTeX-like @verbatim...@end verbatim and @verb{<char>...<char>}
   6619 % If we want to allow any <char> as delimiter,
   6620 % we need the curly braces so that makeinfo sees the @verb command, eg:
   6621 % `@verbx...x' would look like the '@verbx' command.  --janneke (a] gnu.org
   6622 %
   6623 % [Knuth]: Donald Ervin Knuth, 1996.  The TeXbook.
   6624 %
   6625 % [Knuth] p.344; only we need to do the other characters Texinfo sets
   6626 % active too.  Otherwise, they get lost as the first character on a
   6627 % verbatim line.
   6628 \def\dospecials{%
   6629   \do\ \do\\\do\{\do\}\do\$\do\&%
   6630   \do\#\do\^\do\^^K\do\_\do\^^A\do\%\do\~%
   6631   \do\<\do\>\do\|\do\@\do+\do\"%
   6632   % Don't do the quotes -- if we do, @set txicodequoteundirected and
   6633   % @set txicodequotebacktick will not have effect on @verb and
   6634   % @verbatim, and ?` and !` ligatures won't get disabled.
   6635   %\do\`\do\'%
   6636 }
   6637 %
   6638 % [Knuth] p. 380
   6639 \def\uncatcodespecials{%
   6640   \def\do##1{\catcode`##1=\other}\dospecials}
   6641 %
   6642 % Setup for the @verb command.
   6643 %
   6644 % Eight spaces for a tab
   6645 \begingroup
   6646   \catcode`\^^I=\active
   6647   \gdef\tabeightspaces{\catcode`\^^I=\active\def^^I{\ \ \ \ \ \ \ \ }}
   6648 \endgroup
   6649 %
   6650 \def\setupverb{%
   6651   \tt  % easiest (and conventionally used) font for verbatim
   6652   \def\par{\leavevmode\endgraf}%
   6653   \setupmarkupstyle{verb}%
   6654   \tabeightspaces
   6655   % Respect line breaks,
   6656   % print special symbols as themselves, and
   6657   % make each space count
   6658   % must do in this order:
   6659   \obeylines \uncatcodespecials \sepspaces
   6660 }
   6661 
   6662 % Setup for the @verbatim environment
   6663 %
   6664 % Real tab expansion.
   6665 \newdimen\tabw \setbox0=\hbox{\tt\space} \tabw=8\wd0 % tab amount
   6666 %
   6667 % We typeset each line of the verbatim in an \hbox, so we can handle
   6668 % tabs.  The \global is in case the verbatim line starts with an accent,
   6669 % or some other command that starts with a begin-group.  Otherwise, the
   6670 % entire \verbbox would disappear at the corresponding end-group, before
   6671 % it is typeset.  Meanwhile, we can't have nested verbatim commands
   6672 % (can we?), so the \global won't be overwriting itself.
   6673 \newbox\verbbox
   6674 \def\starttabbox{\global\setbox\verbbox=\hbox\bgroup}
   6675 %
   6676 \begingroup
   6677   \catcode`\^^I=\active
   6678   \gdef\tabexpand{%
   6679     \catcode`\^^I=\active
   6680     \def^^I{\leavevmode\egroup
   6681       \dimen\verbbox=\wd\verbbox % the width so far, or since the previous tab
   6682       \divide\dimen\verbbox by\tabw
   6683       \multiply\dimen\verbbox by\tabw % compute previous multiple of \tabw
   6684       \advance\dimen\verbbox by\tabw  % advance to next multiple of \tabw
   6685       \wd\verbbox=\dimen\verbbox \box\verbbox \starttabbox
   6686     }%
   6687   }
   6688 \endgroup
   6689 
   6690 % start the verbatim environment.
   6691 \def\setupverbatim{%
   6692   \let\nonarrowing = t%
   6693   \nonfillstart
   6694   \tt % easiest (and conventionally used) font for verbatim
   6695   % The \leavevmode here is for blank lines.  Otherwise, we would
   6696   % never \starttabox and the \egroup would end verbatim mode.
   6697   \def\par{\leavevmode\egroup\box\verbbox\endgraf}%
   6698   \tabexpand
   6699   \setupmarkupstyle{verbatim}%
   6700   % Respect line breaks,
   6701   % print special symbols as themselves, and
   6702   % make each space count.
   6703   % Must do in this order:
   6704   \obeylines \uncatcodespecials \sepspaces
   6705   \everypar{\starttabbox}%
   6706 }
   6707 
   6708 % Do the @verb magic: verbatim text is quoted by unique
   6709 % delimiter characters.  Before first delimiter expect a
   6710 % right brace, after last delimiter expect closing brace:
   6711 %
   6712 %    \def\doverb'{'<char>#1<char>'}'{#1}
   6713 %
   6714 % [Knuth] p. 382; only eat outer {}
   6715 \begingroup
   6716   \catcode`[=1\catcode`]=2\catcode`\{=\other\catcode`\}=\other
   6717   \gdef\doverb{#1[\def\next##1#1}[##1\endgroup]\next]
   6718 \endgroup
   6719 %
   6720 \def\verb{\begingroup\setupverb\doverb}
   6721 %
   6722 %
   6723 % Do the @verbatim magic: define the macro \doverbatim so that
   6724 % the (first) argument ends when '@end verbatim' is reached, ie:
   6725 %
   6726 %     \def\doverbatim#1@end verbatim{#1}
   6727 %
   6728 % For Texinfo it's a lot easier than for LaTeX,
   6729 % because texinfo's \verbatim doesn't stop at '\end{verbatim}':
   6730 % we need not redefine '\', '{' and '}'.
   6731 %
   6732 % Inspired by LaTeX's verbatim command set [latex.ltx]
   6733 %
   6734 \begingroup
   6735   \catcode`\ =\active
   6736   \obeylines %
   6737   % ignore everything up to the first ^^M, that's the newline at the end
   6738   % of the @verbatim input line itself.  Otherwise we get an extra blank
   6739   % line in the output.
   6740   \xdef\doverbatim#1^^M#2@end verbatim{#2\noexpand\end\gobble verbatim}%
   6741   % We really want {...\end verbatim} in the body of the macro, but
   6742   % without the active space; thus we have to use \xdef and \gobble.
   6743 \endgroup
   6744 %
   6745 \envdef\verbatim{%
   6746     \setupverbatim\doverbatim
   6747 }
   6748 \let\Everbatim = \afterenvbreak
   6749 
   6750 
   6751 % @verbatiminclude FILE - insert text of file in verbatim environment.
   6752 %
   6753 \def\verbatiminclude{\parseargusing\filenamecatcodes\doverbatiminclude}
   6754 %
   6755 \def\doverbatiminclude#1{%
   6756   {%
   6757     \makevalueexpandable
   6758     \setupverbatim
   6759     \indexnofonts       % Allow `@@' and other weird things in file names.
   6760     \wlog{texinfo.tex: doing @verbatiminclude of #1^^J}%
   6761     \input #1
   6762     \afterenvbreak
   6763   }%
   6764 }
   6765 
   6766 % @copying ... @end copying.
   6767 % Save the text away for @insertcopying later.
   6768 %
   6769 % We save the uninterpreted tokens, rather than creating a box.
   6770 % Saving the text in a box would be much easier, but then all the
   6771 % typesetting commands (@smallbook, font changes, etc.) have to be done
   6772 % beforehand -- and a) we want @copying to be done first in the source
   6773 % file; b) letting users define the frontmatter in as flexible order as
   6774 % possible is very desirable.
   6775 %
   6776 \def\copying{\checkenv{}\begingroup\scanargctxt\docopying}
   6777 \def\docopying#1@end copying{\endgroup\def\copyingtext{#1}}
   6778 %
   6779 \def\insertcopying{%
   6780   \begingroup
   6781     \parindent = 0pt  % paragraph indentation looks wrong on title page
   6782     \scanexp\copyingtext
   6783   \endgroup
   6784 }
   6785 
   6786 
   6787 \message{defuns,}
   6788 % @defun etc.
   6789 
   6790 \newskip\defbodyindent \defbodyindent=.4in
   6791 \newskip\defargsindent \defargsindent=50pt
   6792 \newskip\deflastargmargin \deflastargmargin=18pt
   6793 \newcount\defunpenalty
   6794 
   6795 % Start the processing of @deffn:
   6796 \def\startdefun{%
   6797   \ifnum\lastpenalty<10000
   6798     \medbreak
   6799     \defunpenalty=10003 % Will keep this @deffn together with the
   6800                         % following @def command, see below.
   6801   \else
   6802     % If there are two @def commands in a row, we'll have a \nobreak,
   6803     % which is there to keep the function description together with its
   6804     % header.  But if there's nothing but headers, we need to allow a
   6805     % break somewhere.  Check specifically for penalty 10002, inserted
   6806     % by \printdefunline, instead of 10000, since the sectioning
   6807     % commands also insert a nobreak penalty, and we don't want to allow
   6808     % a break between a section heading and a defun.
   6809     %
   6810     % As a further refinement, we avoid "club" headers by signalling
   6811     % with penalty of 10003 after the very first @deffn in the
   6812     % sequence (see above), and penalty of 10002 after any following
   6813     % @def command.
   6814     \ifnum\lastpenalty=10002 \penalty2000 \else \defunpenalty=10002 \fi
   6815     %
   6816     % Similarly, after a section heading, do not allow a break.
   6817     % But do insert the glue.
   6818     \medskip  % preceded by discardable penalty, so not a breakpoint
   6819   \fi
   6820   %
   6821   \parindent=0in
   6822   \advance\leftskip by \defbodyindent
   6823   \exdentamount=\defbodyindent
   6824 }
   6825 
   6826 \def\dodefunx#1{%
   6827   % First, check whether we are in the right environment:
   6828   \checkenv#1%
   6829   %
   6830   % As above, allow line break if we have multiple x headers in a row.
   6831   % It's not a great place, though.
   6832   \ifnum\lastpenalty=10002 \penalty3000 \else \defunpenalty=10002 \fi
   6833   %
   6834   % And now, it's time to reuse the body of the original defun:
   6835   \expandafter\gobbledefun#1%
   6836 }
   6837 \def\gobbledefun#1\startdefun{}
   6838 
   6839 % \printdefunline \deffnheader{text}
   6840 %
   6841 \def\printdefunline#1#2{%
   6842   \begingroup
   6843     % call \deffnheader:
   6844     #1#2 \endheader
   6845     % common ending:
   6846     \interlinepenalty = 10000
   6847     \advance\rightskip by 0pt plus 1fil\relax
   6848     \endgraf
   6849     \nobreak\vskip -\parskip
   6850     \penalty\defunpenalty  % signal to \startdefun and \dodefunx
   6851     % Some of the @defun-type tags do not enable magic parentheses,
   6852     % rendering the following check redundant.  But we don't optimize.
   6853     \checkparencounts
   6854   \endgroup
   6855 }
   6856 
   6857 \def\Edefun{\endgraf\medbreak}
   6858 
   6859 % \makedefun{deffn} creates \deffn, \deffnx and \Edeffn;
   6860 % the only thing remaining is to define \deffnheader.
   6861 %
   6862 \def\makedefun#1{%
   6863   \expandafter\let\csname E#1\endcsname = \Edefun
   6864   \edef\temp{\noexpand\domakedefun
   6865     \makecsname{#1}\makecsname{#1x}\makecsname{#1header}}%
   6866   \temp
   6867 }
   6868 
   6869 % \domakedefun \deffn \deffnx \deffnheader
   6870 %
   6871 % Define \deffn and \deffnx, without parameters.
   6872 % \deffnheader has to be defined explicitly.
   6873 %
   6874 \def\domakedefun#1#2#3{%
   6875   \envdef#1{%
   6876     \startdefun
   6877     \doingtypefnfalse    % distinguish typed functions from all else
   6878     \parseargusing\activeparens{\printdefunline#3}%
   6879   }%
   6880   \def#2{\dodefunx#1}%
   6881   \def#3%
   6882 }
   6883 
   6884 \newif\ifdoingtypefn       % doing typed function?
   6885 \newif\ifrettypeownline    % typeset return type on its own line?
   6886 
   6887 % @deftypefnnewline on|off says whether the return type of typed functions
   6888 % are printed on their own line.  This affects @deftypefn, @deftypefun,
   6889 % @deftypeop, and @deftypemethod.
   6890 % 
   6891 \parseargdef\deftypefnnewline{%
   6892   \def\temp{#1}%
   6893   \ifx\temp\onword
   6894     \expandafter\let\csname SETtxideftypefnnl\endcsname
   6895       = \empty
   6896   \else\ifx\temp\offword
   6897     \expandafter\let\csname SETtxideftypefnnl\endcsname
   6898       = \relax
   6899   \else
   6900     \errhelp = \EMsimple
   6901     \errmessage{Unknown @txideftypefnnl value `\temp',
   6902                 must be on|off}%
   6903   \fi\fi
   6904 }
   6905 
   6906 % Untyped functions:
   6907 
   6908 % @deffn category name args
   6909 \makedefun{deffn}{\deffngeneral{}}
   6910 
   6911 % @deffn category class name args
   6912 \makedefun{defop}#1 {\defopon{#1\ \putwordon}}
   6913 
   6914 % \defopon {category on}class name args
   6915 \def\defopon#1#2 {\deffngeneral{\putwordon\ \code{#2}}{#1\ \code{#2}} }
   6916 
   6917 % \deffngeneral {subind}category name args
   6918 %
   6919 \def\deffngeneral#1#2 #3 #4\endheader{%
   6920   % Remember that \dosubind{fn}{foo}{} is equivalent to \doind{fn}{foo}.
   6921   \dosubind{fn}{\code{#3}}{#1}%
   6922   \defname{#2}{}{#3}\magicamp\defunargs{#4\unskip}%
   6923 }
   6924 
   6925 % Typed functions:
   6926 
   6927 % @deftypefn category type name args
   6928 \makedefun{deftypefn}{\deftypefngeneral{}}
   6929 
   6930 % @deftypeop category class type name args
   6931 \makedefun{deftypeop}#1 {\deftypeopon{#1\ \putwordon}}
   6932 
   6933 % \deftypeopon {category on}class type name args
   6934 \def\deftypeopon#1#2 {\deftypefngeneral{\putwordon\ \code{#2}}{#1\ \code{#2}} }
   6935 
   6936 % \deftypefngeneral {subind}category type name args
   6937 %
   6938 \def\deftypefngeneral#1#2 #3 #4 #5\endheader{%
   6939   \dosubind{fn}{\code{#4}}{#1}%
   6940   \doingtypefntrue
   6941   \defname{#2}{#3}{#4}\defunargs{#5\unskip}%
   6942 }
   6943 
   6944 % Typed variables:
   6945 
   6946 % @deftypevr category type var args
   6947 \makedefun{deftypevr}{\deftypecvgeneral{}}
   6948 
   6949 % @deftypecv category class type var args
   6950 \makedefun{deftypecv}#1 {\deftypecvof{#1\ \putwordof}}
   6951 
   6952 % \deftypecvof {category of}class type var args
   6953 \def\deftypecvof#1#2 {\deftypecvgeneral{\putwordof\ \code{#2}}{#1\ \code{#2}} }
   6954 
   6955 % \deftypecvgeneral {subind}category type var args
   6956 %
   6957 \def\deftypecvgeneral#1#2 #3 #4 #5\endheader{%
   6958   \dosubind{vr}{\code{#4}}{#1}%
   6959   \defname{#2}{#3}{#4}\defunargs{#5\unskip}%
   6960 }
   6961 
   6962 % Untyped variables:
   6963 
   6964 % @defvr category var args
   6965 \makedefun{defvr}#1 {\deftypevrheader{#1} {} }
   6966 
   6967 % @defcv category class var args
   6968 \makedefun{defcv}#1 {\defcvof{#1\ \putwordof}}
   6969 
   6970 % \defcvof {category of}class var args
   6971 \def\defcvof#1#2 {\deftypecvof{#1}#2 {} }
   6972 
   6973 % Types:
   6974 
   6975 % @deftp category name args
   6976 \makedefun{deftp}#1 #2 #3\endheader{%
   6977   \doind{tp}{\code{#2}}%
   6978   \defname{#1}{}{#2}\defunargs{#3\unskip}%
   6979 }
   6980 
   6981 % Remaining @defun-like shortcuts:
   6982 \makedefun{defun}{\deffnheader{\putwordDeffunc} }
   6983 \makedefun{defmac}{\deffnheader{\putwordDefmac} }
   6984 \makedefun{defspec}{\deffnheader{\putwordDefspec} }
   6985 \makedefun{deftypefun}{\deftypefnheader{\putwordDeffunc} }
   6986 \makedefun{defvar}{\defvrheader{\putwordDefvar} }
   6987 \makedefun{defopt}{\defvrheader{\putwordDefopt} }
   6988 \makedefun{deftypevar}{\deftypevrheader{\putwordDefvar} }
   6989 \makedefun{defmethod}{\defopon\putwordMethodon}
   6990 \makedefun{deftypemethod}{\deftypeopon\putwordMethodon}
   6991 \makedefun{defivar}{\defcvof\putwordInstanceVariableof}
   6992 \makedefun{deftypeivar}{\deftypecvof\putwordInstanceVariableof}
   6993 
   6994 % \defname, which formats the name of the @def (not the args).
   6995 % #1 is the category, such as "Function".
   6996 % #2 is the return type, if any.
   6997 % #3 is the function name.
   6998 %
   6999 % We are followed by (but not passed) the arguments, if any.
   7000 %
   7001 \def\defname#1#2#3{%
   7002   \par
   7003   % Get the values of \leftskip and \rightskip as they were outside the @def...
   7004   \advance\leftskip by -\defbodyindent
   7005   %
   7006   % Determine if we are typesetting the return type of a typed function
   7007   % on a line by itself.
   7008   \rettypeownlinefalse
   7009   \ifdoingtypefn  % doing a typed function specifically?
   7010     % then check user option for putting return type on its own line:
   7011     \expandafter\ifx\csname SETtxideftypefnnl\endcsname\relax \else
   7012       \rettypeownlinetrue
   7013     \fi
   7014   \fi
   7015   %
   7016   % How we'll format the category name.  Putting it in brackets helps
   7017   % distinguish it from the body text that may end up on the next line
   7018   % just below it.
   7019   \def\temp{#1}%
   7020   \setbox0=\hbox{\kern\deflastargmargin \ifx\temp\empty\else [\rm\temp]\fi}
   7021   %
   7022   % Figure out line sizes for the paragraph shape.  We'll always have at
   7023   % least two.
   7024   \tempnum = 2
   7025   %
   7026   % The first line needs space for \box0; but if \rightskip is nonzero,
   7027   % we need only space for the part of \box0 which exceeds it:
   7028   \dimen0=\hsize  \advance\dimen0 by -\wd0  \advance\dimen0 by \rightskip
   7029   %
   7030   % If doing a return type on its own line, we'll have another line.
   7031   \ifrettypeownline
   7032     \advance\tempnum by 1
   7033     \def\maybeshapeline{0in \hsize}%
   7034   \else
   7035     \def\maybeshapeline{}%
   7036   \fi
   7037   %
   7038   % The continuations:
   7039   \dimen2=\hsize  \advance\dimen2 by -\defargsindent
   7040   %
   7041   % The final paragraph shape:
   7042   \parshape \tempnum  0in \dimen0  \maybeshapeline  \defargsindent \dimen2
   7043   %
   7044   % Put the category name at the right margin.
   7045   \noindent
   7046   \hbox to 0pt{%
   7047     \hfil\box0 \kern-\hsize
   7048     % \hsize has to be shortened this way:
   7049     \kern\leftskip
   7050     % Intentionally do not respect \rightskip, since we need the space.
   7051   }%
   7052   %
   7053   % Allow all lines to be underfull without complaint:
   7054   \tolerance=10000 \hbadness=10000
   7055   \exdentamount=\defbodyindent
   7056   {%
   7057     % defun fonts. We use typewriter by default (used to be bold) because:
   7058     % . we're printing identifiers, they should be in tt in principle.
   7059     % . in languages with many accents, such as Czech or French, it's
   7060     %   common to leave accents off identifiers.  The result looks ok in
   7061     %   tt, but exceedingly strange in rm.
   7062     % . we don't want -- and --- to be treated as ligatures.
   7063     % . this still does not fix the ?` and !` ligatures, but so far no
   7064     %   one has made identifiers using them :).
   7065     \df \tt
   7066     \def\temp{#2}% text of the return type
   7067     \ifx\temp\empty\else
   7068       \tclose{\temp}% typeset the return type
   7069       \ifrettypeownline
   7070         % put return type on its own line; prohibit line break following:
   7071         \hfil\vadjust{\nobreak}\break  
   7072       \else
   7073         \space  % type on same line, so just followed by a space
   7074       \fi
   7075     \fi           % no return type
   7076     #3% output function name
   7077   }%
   7078   {\rm\enskip}% hskip 0.5 em of \tenrm
   7079   %
   7080   \boldbrax
   7081   % arguments will be output next, if any.
   7082 }
   7083 
   7084 % Print arguments in slanted roman (not ttsl), inconsistently with using
   7085 % tt for the name.  This is because literal text is sometimes needed in
   7086 % the argument list (groff manual), and ttsl and tt are not very
   7087 % distinguishable.  Prevent hyphenation at `-' chars.
   7088 %
   7089 \def\defunargs#1{%
   7090   % use sl by default (not ttsl),
   7091   % tt for the names.
   7092   \df \sl \hyphenchar\font=0
   7093   %
   7094   % On the other hand, if an argument has two dashes (for instance), we
   7095   % want a way to get ttsl.  We used to recommend @var for that, so
   7096   % leave the code in, but it's strange for @var to lead to typewriter.
   7097   % Nowadays we recommend @code, since the difference between a ttsl hyphen
   7098   % and a tt hyphen is pretty tiny.  @code also disables ?` !`.
   7099   \def\var##1{{\setupmarkupstyle{var}\ttslanted{##1}}}%
   7100   #1%
   7101   \sl\hyphenchar\font=45
   7102 }
   7103 
   7104 % We want ()&[] to print specially on the defun line.
   7105 %
   7106 \def\activeparens{%
   7107   \catcode`\(=\active \catcode`\)=\active
   7108   \catcode`\[=\active \catcode`\]=\active
   7109   \catcode`\&=\active
   7110 }
   7111 
   7112 % Make control sequences which act like normal parenthesis chars.
   7113 \let\lparen = ( \let\rparen = )
   7114 
   7115 % Be sure that we always have a definition for `(', etc.  For example,
   7116 % if the fn name has parens in it, \boldbrax will not be in effect yet,
   7117 % so TeX would otherwise complain about undefined control sequence.
   7118 {
   7119   \activeparens
   7120   \global\let(=\lparen \global\let)=\rparen
   7121   \global\let[=\lbrack \global\let]=\rbrack
   7122   \global\let& = \&
   7123 
   7124   \gdef\boldbrax{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb}
   7125   \gdef\magicamp{\let&=\amprm}
   7126 }
   7127 
   7128 \newcount\parencount
   7129 
   7130 % If we encounter &foo, then turn on ()-hacking afterwards
   7131 \newif\ifampseen
   7132 \def\amprm#1 {\ampseentrue{\bf\&#1 }}
   7133 
   7134 \def\parenfont{%
   7135   \ifampseen
   7136     % At the first level, print parens in roman,
   7137     % otherwise use the default font.
   7138     \ifnum \parencount=1 \rm \fi
   7139   \else
   7140     % The \sf parens (in \boldbrax) actually are a little bolder than
   7141     % the contained text.  This is especially needed for [ and ] .
   7142     \sf
   7143   \fi
   7144 }
   7145 \def\infirstlevel#1{%
   7146   \ifampseen
   7147     \ifnum\parencount=1
   7148       #1%
   7149     \fi
   7150   \fi
   7151 }
   7152 \def\bfafterword#1 {#1 \bf}
   7153 
   7154 \def\opnr{%
   7155   \global\advance\parencount by 1
   7156   {\parenfont(}%
   7157   \infirstlevel \bfafterword
   7158 }
   7159 \def\clnr{%
   7160   {\parenfont)}%
   7161   \infirstlevel \sl
   7162   \global\advance\parencount by -1
   7163 }
   7164 
   7165 \newcount\brackcount
   7166 \def\lbrb{%
   7167   \global\advance\brackcount by 1
   7168   {\bf[}%
   7169 }
   7170 \def\rbrb{%
   7171   {\bf]}%
   7172   \global\advance\brackcount by -1
   7173 }
   7174 
   7175 \def\checkparencounts{%
   7176   \ifnum\parencount=0 \else \badparencount \fi
   7177   \ifnum\brackcount=0 \else \badbrackcount \fi
   7178 }
   7179 % these should not use \errmessage; the glibc manual, at least, actually
   7180 % has such constructs (when documenting function pointers).
   7181 \def\badparencount{%
   7182   \message{Warning: unbalanced parentheses in @def...}%
   7183   \global\parencount=0
   7184 }
   7185 \def\badbrackcount{%
   7186   \message{Warning: unbalanced square brackets in @def...}%
   7187   \global\brackcount=0
   7188 }
   7189 
   7190 
   7191 \message{macros,}
   7192 % @macro.
   7193 
   7194 % To do this right we need a feature of e-TeX, \scantokens,
   7195 % which we arrange to emulate with a temporary file in ordinary TeX.
   7196 \ifx\eTeXversion\thisisundefined
   7197   \newwrite\macscribble
   7198   \def\scantokens#1{%
   7199     \toks0={#1}%
   7200     \immediate\openout\macscribble=\jobname.tmp
   7201     \immediate\write\macscribble{\the\toks0}%
   7202     \immediate\closeout\macscribble
   7203     \input \jobname.tmp
   7204   }
   7205 \fi
   7206 
   7207 \def\scanmacro#1{\begingroup
   7208   \newlinechar`\^^M
   7209   \let\xeatspaces\eatspaces
   7210   %
   7211   % Undo catcode changes of \startcontents and \doprintindex
   7212   % When called from @insertcopying or (short)caption, we need active
   7213   % backslash to get it printed correctly.  Previously, we had
   7214   % \catcode`\\=\other instead.  We'll see whether a problem appears
   7215   % with macro expansion.				--kasal, 19aug04
   7216   \catcode`\@=0 \catcode`\\=\active \escapechar=`\@
   7217   %
   7218   % ... and for \example:
   7219   \spaceisspace
   7220   %
   7221   % The \empty here causes a following catcode 5 newline to be eaten as
   7222   % part of reading whitespace after a control sequence.  It does not
   7223   % eat a catcode 13 newline.  There's no good way to handle the two
   7224   % cases (untried: maybe e-TeX's \everyeof could help, though plain TeX
   7225   % would then have different behavior).  See the Macro Details node in
   7226   % the manual for the workaround we recommend for macros and
   7227   % line-oriented commands.
   7228   % 
   7229   \scantokens{#1\empty}%
   7230 \endgroup}
   7231 
   7232 \def\scanexp#1{%
   7233   \edef\temp{\noexpand\scanmacro{#1}}%
   7234   \temp
   7235 }
   7236 
   7237 \newcount\paramno   % Count of parameters
   7238 \newtoks\macname    % Macro name
   7239 \newif\ifrecursive  % Is it recursive?
   7240 
   7241 % List of all defined macros in the form
   7242 %    \definedummyword\macro1\definedummyword\macro2...
   7243 % Currently is also contains all @aliases; the list can be split
   7244 % if there is a need.
   7245 \def\macrolist{}
   7246 
   7247 % Add the macro to \macrolist
   7248 \def\addtomacrolist#1{\expandafter \addtomacrolistxxx \csname#1\endcsname}
   7249 \def\addtomacrolistxxx#1{%
   7250      \toks0 = \expandafter{\macrolist\definedummyword#1}%
   7251      \xdef\macrolist{\the\toks0}%
   7252 }
   7253 
   7254 % Utility routines.
   7255 % This does \let #1 = #2, with \csnames; that is,
   7256 %   \let \csname#1\endcsname = \csname#2\endcsname
   7257 % (except of course we have to play expansion games).
   7258 %
   7259 \def\cslet#1#2{%
   7260   \expandafter\let
   7261   \csname#1\expandafter\endcsname
   7262   \csname#2\endcsname
   7263 }
   7264 
   7265 % Trim leading and trailing spaces off a string.
   7266 % Concepts from aro-bend problem 15 (see CTAN).
   7267 {\catcode`\@=11
   7268 \gdef\eatspaces #1{\expandafter\trim@\expandafter{#1 }}
   7269 \gdef\trim@ #1{\trim@@ @#1 @ #1 @ @@}
   7270 \gdef\trim@@ #1@ #2@ #3@@{\trim@@@\empty #2 @}
   7271 \def\unbrace#1{#1}
   7272 \unbrace{\gdef\trim@@@ #1 } #2@{#1}
   7273 }
   7274 
   7275 % Trim a single trailing ^^M off a string.
   7276 {\catcode`\^^M=\other \catcode`\Q=3%
   7277 \gdef\eatcr #1{\eatcra #1Q^^MQ}%
   7278 \gdef\eatcra#1^^MQ{\eatcrb#1Q}%
   7279 \gdef\eatcrb#1Q#2Q{#1}%
   7280 }
   7281 
   7282 % Macro bodies are absorbed as an argument in a context where
   7283 % all characters are catcode 10, 11 or 12, except \ which is active
   7284 % (as in normal texinfo). It is necessary to change the definition of \
   7285 % to recognize macro arguments; this is the job of \mbodybackslash.
   7286 %
   7287 % Non-ASCII encodings make 8-bit characters active, so un-activate
   7288 % them to avoid their expansion.  Must do this non-globally, to
   7289 % confine the change to the current group.
   7290 %
   7291 % It's necessary to have hard CRs when the macro is executed. This is
   7292 % done by making ^^M (\endlinechar) catcode 12 when reading the macro
   7293 % body, and then making it the \newlinechar in \scanmacro.
   7294 %
   7295 \def\scanctxt{% used as subroutine
   7296   \catcode`\"=\other
   7297   \catcode`\+=\other
   7298   \catcode`\<=\other
   7299   \catcode`\>=\other
   7300   \catcode`\@=\other
   7301   \catcode`\^=\other
   7302   \catcode`\_=\other
   7303   \catcode`\|=\other
   7304   \catcode`\~=\other
   7305   \ifx\declaredencoding\ascii \else \setnonasciicharscatcodenonglobal\other \fi
   7306 }
   7307 
   7308 \def\scanargctxt{% used for copying and captions, not macros.
   7309   \scanctxt
   7310   \catcode`\\=\other
   7311   \catcode`\^^M=\other
   7312 }
   7313 
   7314 \def\macrobodyctxt{% used for @macro definitions
   7315   \scanctxt
   7316   \catcode`\{=\other
   7317   \catcode`\}=\other
   7318   \catcode`\^^M=\other
   7319   \usembodybackslash
   7320 }
   7321 
   7322 \def\macroargctxt{% used when scanning invocations
   7323   \scanctxt
   7324   \catcode`\\=0
   7325 }
   7326 % why catcode 0 for \ in the above?  To recognize \\ \{ \} as "escapes"
   7327 % for the single characters \ { }.  Thus, we end up with the "commands"
   7328 % that would be written @\ @{ @} in a Texinfo document.
   7329 % 
   7330 % We already have @{ and @}.  For @\, we define it here, and only for
   7331 % this purpose, to produce a typewriter backslash (so, the @\ that we
   7332 % define for @math can't be used with @macro calls):
   7333 %
   7334 \def\\{\normalbackslash}%
   7335 % 
   7336 % We would like to do this for \, too, since that is what makeinfo does.
   7337 % But it is not possible, because Texinfo already has a command @, for a
   7338 % cedilla accent.  Documents must use @comma{} instead.
   7339 %
   7340 % \anythingelse will almost certainly be an error of some kind.
   7341 
   7342 
   7343 % \mbodybackslash is the definition of \ in @macro bodies.
   7344 % It maps \foo\ => \csname macarg.foo\endcsname => #N
   7345 % where N is the macro parameter number.
   7346 % We define \csname macarg.\endcsname to be \realbackslash, so
   7347 % \\ in macro replacement text gets you a backslash.
   7348 %
   7349 {\catcode`@=0 @catcode`@\=@active
   7350  @gdef@usembodybackslash{@let\=@mbodybackslash}
   7351  @gdef@mbodybackslash#1\{@csname macarg.#1@endcsname}
   7352 }
   7353 \expandafter\def\csname macarg.\endcsname{\realbackslash}
   7354 
   7355 \def\margbackslash#1{\char`\#1 }
   7356 
   7357 \def\macro{\recursivefalse\parsearg\macroxxx}
   7358 \def\rmacro{\recursivetrue\parsearg\macroxxx}
   7359 
   7360 \def\macroxxx#1{%
   7361   \getargs{#1}% now \macname is the macname and \argl the arglist
   7362   \ifx\argl\empty       % no arguments
   7363      \paramno=0\relax
   7364   \else
   7365      \expandafter\parsemargdef \argl;%
   7366      \if\paramno>256\relax
   7367        \ifx\eTeXversion\thisisundefined
   7368          \errhelp = \EMsimple
   7369          \errmessage{You need eTeX to compile a file with macros with more than 256 arguments}
   7370        \fi
   7371      \fi
   7372   \fi
   7373   \if1\csname ismacro.\the\macname\endcsname
   7374      \message{Warning: redefining \the\macname}%
   7375   \else
   7376      \expandafter\ifx\csname \the\macname\endcsname \relax
   7377      \else \errmessage{Macro name \the\macname\space already defined}\fi
   7378      \global\cslet{macsave.\the\macname}{\the\macname}%
   7379      \global\expandafter\let\csname ismacro.\the\macname\endcsname=1%
   7380      \addtomacrolist{\the\macname}%
   7381   \fi
   7382   \begingroup \macrobodyctxt
   7383   \ifrecursive \expandafter\parsermacbody
   7384   \else \expandafter\parsemacbody
   7385   \fi}
   7386 
   7387 \parseargdef\unmacro{%
   7388   \if1\csname ismacro.#1\endcsname
   7389     \global\cslet{#1}{macsave.#1}%
   7390     \global\expandafter\let \csname ismacro.#1\endcsname=0%
   7391     % Remove the macro name from \macrolist:
   7392     \begingroup
   7393       \expandafter\let\csname#1\endcsname \relax
   7394       \let\definedummyword\unmacrodo
   7395       \xdef\macrolist{\macrolist}%
   7396     \endgroup
   7397   \else
   7398     \errmessage{Macro #1 not defined}%
   7399   \fi
   7400 }
   7401 
   7402 % Called by \do from \dounmacro on each macro.  The idea is to omit any
   7403 % macro definitions that have been changed to \relax.
   7404 %
   7405 \def\unmacrodo#1{%
   7406   \ifx #1\relax
   7407     % remove this
   7408   \else
   7409     \noexpand\definedummyword \noexpand#1%
   7410   \fi
   7411 }
   7412 
   7413 % This makes use of the obscure feature that if the last token of a
   7414 % <parameter list> is #, then the preceding argument is delimited by
   7415 % an opening brace, and that opening brace is not consumed.
   7416 \def\getargs#1{\getargsxxx#1{}}
   7417 \def\getargsxxx#1#{\getmacname #1 \relax\getmacargs}
   7418 \def\getmacname#1 #2\relax{\macname={#1}}
   7419 \def\getmacargs#1{\def\argl{#1}}
   7420 
   7421 % For macro processing make @ a letter so that we can make Texinfo private macro names.
   7422 \edef\texiatcatcode{\the\catcode`\@}
   7423 \catcode `@=11\relax
   7424 
   7425 % Parse the optional {params} list.  Set up \paramno and \paramlist
   7426 % so \defmacro knows what to do.  Define \macarg.BLAH for each BLAH
   7427 % in the params list to some hook where the argument si to be expanded.  If
   7428 % there are less than 10 arguments that hook is to be replaced by ##N where N
   7429 % is the position in that list, that is to say the macro arguments are to be
   7430 % defined `a la TeX in the macro body.  
   7431 %
   7432 % That gets used by \mbodybackslash (above).
   7433 %
   7434 % We need to get `macro parameter char #' into several definitions.
   7435 % The technique used is stolen from LaTeX: let \hash be something
   7436 % unexpandable, insert that wherever you need a #, and then redefine
   7437 % it to # just before using the token list produced.
   7438 %
   7439 % The same technique is used to protect \eatspaces till just before
   7440 % the macro is used.
   7441 %
   7442 % If there are 10 or more arguments, a different technique is used, where the
   7443 % hook remains in the body, and when macro is to be expanded the body is
   7444 % processed again to replace the arguments.
   7445 %
   7446 % In that case, the hook is \the\toks N-1, and we simply set \toks N-1 to the
   7447 % argument N value and then \edef  the body (nothing else will expand because of
   7448 % the catcode regime underwhich the body was input).
   7449 %
   7450 % If you compile with TeX (not eTeX), and you have macros with 10 or more
   7451 % arguments, you need that no macro has more than 256 arguments, otherwise an
   7452 % error is produced.
   7453 \def\parsemargdef#1;{%
   7454   \paramno=0\def\paramlist{}%
   7455   \let\hash\relax
   7456   \let\xeatspaces\relax
   7457   \parsemargdefxxx#1,;,%
   7458   % In case that there are 10 or more arguments we parse again the arguments
   7459   % list to set new definitions for the \macarg.BLAH macros corresponding to
   7460   % each BLAH argument. It was anyhow needed to parse already once this list
   7461   % in order to count the arguments, and as macros with at most 9 arguments
   7462   % are by far more frequent than macro with 10 or more arguments, defining
   7463   % twice the \macarg.BLAH macros does not cost too much processing power.
   7464   \ifnum\paramno<10\relax\else
   7465     \paramno0\relax
   7466     \parsemmanyargdef@@#1,;,% 10 or more arguments
   7467   \fi
   7468 }
   7469 \def\parsemargdefxxx#1,{%
   7470   \if#1;\let\next=\relax
   7471   \else \let\next=\parsemargdefxxx
   7472     \advance\paramno by 1
   7473     \expandafter\edef\csname macarg.\eatspaces{#1}\endcsname
   7474         {\xeatspaces{\hash\the\paramno}}%
   7475     \edef\paramlist{\paramlist\hash\the\paramno,}%
   7476   \fi\next}
   7477 
   7478 \def\parsemmanyargdef@@#1,{%
   7479   \if#1;\let\next=\relax
   7480   \else 
   7481     \let\next=\parsemmanyargdef@@
   7482     \edef\tempb{\eatspaces{#1}}%
   7483     \expandafter\def\expandafter\tempa
   7484        \expandafter{\csname macarg.\tempb\endcsname}%
   7485     % Note that we need some extra \noexpand\noexpand, this is because we
   7486     % don't want \the  to be expanded in the \parsermacbody  as it uses an
   7487     % \xdef .
   7488     \expandafter\edef\tempa
   7489       {\noexpand\noexpand\noexpand\the\toks\the\paramno}%
   7490     \advance\paramno by 1\relax
   7491   \fi\next}
   7492 
   7493 % These two commands read recursive and nonrecursive macro bodies.
   7494 % (They're different since rec and nonrec macros end differently.)
   7495 %
   7496 
   7497 \catcode `\@\texiatcatcode
   7498 \long\def\parsemacbody#1@end macro%
   7499 {\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
   7500 \long\def\parsermacbody#1@end rmacro%
   7501 {\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
   7502 \catcode `\@=11\relax
   7503 
   7504 \let\endargs@\relax
   7505 \let\nil@\relax
   7506 \def\nilm@{\nil@}%
   7507 \long\def\nillm@{\nil@}%
   7508 
   7509 % This macro is expanded during the Texinfo macro expansion, not during its
   7510 % definition.  It gets all the arguments values and assigns them to macros
   7511 % macarg.ARGNAME
   7512 %
   7513 % #1 is the macro name
   7514 % #2 is the list of argument names
   7515 % #3 is the list of argument values
   7516 \def\getargvals@#1#2#3{%
   7517   \def\macargdeflist@{}%
   7518   \def\saveparamlist@{#2}% Need to keep a copy for parameter expansion.
   7519   \def\paramlist{#2,\nil@}%
   7520   \def\macroname{#1}%
   7521   \begingroup
   7522   \macroargctxt
   7523   \def\argvaluelist{#3,\nil@}%
   7524   \def\@tempa{#3}%
   7525   \ifx\@tempa\empty
   7526     \setemptyargvalues@
   7527   \else
   7528     \getargvals@@
   7529   \fi
   7530 }
   7531 
   7532 % 
   7533 \def\getargvals@@{%
   7534   \ifx\paramlist\nilm@
   7535       % Some sanity check needed here that \argvaluelist is also empty.
   7536       \ifx\argvaluelist\nillm@
   7537       \else
   7538         \errhelp = \EMsimple
   7539         \errmessage{Too many arguments in macro `\macroname'!}%
   7540       \fi
   7541       \let\next\macargexpandinbody@
   7542   \else
   7543     \ifx\argvaluelist\nillm@
   7544        % No more arguments values passed to macro.  Set remaining named-arg
   7545        % macros to empty.
   7546        \let\next\setemptyargvalues@
   7547     \else
   7548       % pop current arg name into \@tempb
   7549       \def\@tempa##1{\pop@{\@tempb}{\paramlist}##1\endargs@}%
   7550       \expandafter\@tempa\expandafter{\paramlist}%
   7551        % pop current argument value into \@tempc
   7552       \def\@tempa##1{\longpop@{\@tempc}{\argvaluelist}##1\endargs@}%
   7553       \expandafter\@tempa\expandafter{\argvaluelist}%
   7554        % Here \@tempb is the current arg name and \@tempc is the current arg value.
   7555        % First place the new argument macro definition into \@tempd
   7556        \expandafter\macname\expandafter{\@tempc}%
   7557        \expandafter\let\csname macarg.\@tempb\endcsname\relax
   7558        \expandafter\def\expandafter\@tempe\expandafter{%
   7559          \csname macarg.\@tempb\endcsname}%
   7560        \edef\@tempd{\long\def\@tempe{\the\macname}}%
   7561        \push@\@tempd\macargdeflist@
   7562        \let\next\getargvals@@
   7563     \fi
   7564   \fi
   7565   \next
   7566 }
   7567 
   7568 \def\push@#1#2{%
   7569   \expandafter\expandafter\expandafter\def
   7570   \expandafter\expandafter\expandafter#2%
   7571   \expandafter\expandafter\expandafter{%
   7572   \expandafter#1#2}%
   7573 }
   7574 
   7575 % Replace arguments by their values in the macro body, and place the result
   7576 % in macro \@tempa
   7577 \def\macvalstoargs@{%
   7578   %  To do this we use the property that token registers that are \the'ed
   7579   % within an \edef  expand only once. So we are going to place all argument
   7580   % values into respective token registers.
   7581   %
   7582   % First we save the token context, and initialize argument numbering.
   7583   \begingroup
   7584     \paramno0\relax
   7585     % Then, for each argument number #N, we place the corresponding argument
   7586     % value into a new token list register \toks#N
   7587     \expandafter\putargsintokens@\saveparamlist@,;,%
   7588     % Then, we expand the body so that argument are replaced by their
   7589     % values. The trick for values not to be expanded themselves is that they
   7590     % are within tokens and that tokens expand only once in an \edef .
   7591     \edef\@tempc{\csname mac.\macroname .body\endcsname}%
   7592     % Now we restore the token stack pointer to free the token list registers
   7593     % which we have used, but we make sure that expanded body is saved after
   7594     % group.
   7595     \expandafter
   7596   \endgroup
   7597   \expandafter\def\expandafter\@tempa\expandafter{\@tempc}%
   7598   }
   7599 
   7600 \def\macargexpandinbody@{% 
   7601   %% Define the named-macro outside of this group and then close this group. 
   7602   \expandafter
   7603   \endgroup
   7604   \macargdeflist@
   7605   % First the replace in body the macro arguments by their values, the result
   7606   % is in \@tempa .
   7607   \macvalstoargs@
   7608   % Then we point at the \norecurse or \gobble (for recursive) macro value
   7609   % with \@tempb .
   7610   \expandafter\let\expandafter\@tempb\csname mac.\macroname .recurse\endcsname
   7611   % Depending on whether it is recursive or not, we need some tailing
   7612   % \egroup .
   7613   \ifx\@tempb\gobble
   7614      \let\@tempc\relax
   7615   \else
   7616      \let\@tempc\egroup
   7617   \fi
   7618   % And now we do the real job:
   7619   \edef\@tempd{\noexpand\@tempb{\macroname}\noexpand\scanmacro{\@tempa}\@tempc}%
   7620   \@tempd
   7621 }
   7622 
   7623 \def\putargsintokens@#1,{%
   7624   \if#1;\let\next\relax
   7625   \else
   7626     \let\next\putargsintokens@
   7627     % First we allocate the new token list register, and give it a temporary
   7628     % alias \@tempb .
   7629     \toksdef\@tempb\the\paramno
   7630     % Then we place the argument value into that token list register.
   7631     \expandafter\let\expandafter\@tempa\csname macarg.#1\endcsname
   7632     \expandafter\@tempb\expandafter{\@tempa}%
   7633     \advance\paramno by 1\relax
   7634   \fi
   7635   \next
   7636 }
   7637 
   7638 % Save the token stack pointer into macro #1
   7639 \def\texisavetoksstackpoint#1{\edef#1{\the\@cclvi}}
   7640 % Restore the token stack pointer from number in macro #1
   7641 \def\texirestoretoksstackpoint#1{\expandafter\mathchardef\expandafter\@cclvi#1\relax}
   7642 % newtoks that can be used non \outer .
   7643 \def\texinonouternewtoks{\alloc@ 5\toks \toksdef \@cclvi}
   7644 
   7645 % Tailing missing arguments are set to empty
   7646 \def\setemptyargvalues@{%
   7647   \ifx\paramlist\nilm@
   7648     \let\next\macargexpandinbody@
   7649   \else
   7650     \expandafter\setemptyargvaluesparser@\paramlist\endargs@
   7651     \let\next\setemptyargvalues@
   7652   \fi
   7653   \next
   7654 }
   7655 
   7656 \def\setemptyargvaluesparser@#1,#2\endargs@{%
   7657   \expandafter\def\expandafter\@tempa\expandafter{%
   7658     \expandafter\def\csname macarg.#1\endcsname{}}%
   7659   \push@\@tempa\macargdeflist@
   7660   \def\paramlist{#2}%
   7661 }
   7662 
   7663 % #1 is the element target macro
   7664 % #2 is the list macro
   7665 % #3,#4\endargs@ is the list value
   7666 \def\pop@#1#2#3,#4\endargs@{%
   7667    \def#1{#3}%
   7668    \def#2{#4}%
   7669 }
   7670 \long\def\longpop@#1#2#3,#4\endargs@{%
   7671    \long\def#1{#3}%
   7672    \long\def#2{#4}%
   7673 }
   7674 
   7675 % This defines a Texinfo @macro. There are eight cases: recursive and
   7676 % nonrecursive macros of zero, one, up to nine, and many arguments.
   7677 % Much magic with \expandafter here.
   7678 % \xdef is used so that macro definitions will survive the file
   7679 % they're defined in; @include reads the file inside a group.
   7680 %
   7681 \def\defmacro{%
   7682   \let\hash=##% convert placeholders to macro parameter chars
   7683   \ifrecursive
   7684     \ifcase\paramno
   7685     % 0
   7686       \expandafter\xdef\csname\the\macname\endcsname{%
   7687         \noexpand\scanmacro{\temp}}%
   7688     \or % 1
   7689       \expandafter\xdef\csname\the\macname\endcsname{%
   7690          \bgroup\noexpand\macroargctxt
   7691          \noexpand\braceorline
   7692          \expandafter\noexpand\csname\the\macname xxx\endcsname}%
   7693       \expandafter\xdef\csname\the\macname xxx\endcsname##1{%
   7694          \egroup\noexpand\scanmacro{\temp}}%
   7695     \else
   7696       \ifnum\paramno<10\relax % at most 9
   7697         \expandafter\xdef\csname\the\macname\endcsname{%
   7698            \bgroup\noexpand\macroargctxt
   7699            \noexpand\csname\the\macname xx\endcsname}%
   7700         \expandafter\xdef\csname\the\macname xx\endcsname##1{%
   7701             \expandafter\noexpand\csname\the\macname xxx\endcsname ##1,}%
   7702         \expandafter\expandafter
   7703         \expandafter\xdef
   7704         \expandafter\expandafter
   7705           \csname\the\macname xxx\endcsname
   7706             \paramlist{\egroup\noexpand\scanmacro{\temp}}%
   7707       \else % 10 or more
   7708         \expandafter\xdef\csname\the\macname\endcsname{%
   7709           \noexpand\getargvals@{\the\macname}{\argl}%
   7710         }%    
   7711         \global\expandafter\let\csname mac.\the\macname .body\endcsname\temp
   7712         \global\expandafter\let\csname mac.\the\macname .recurse\endcsname\gobble
   7713       \fi
   7714     \fi
   7715   \else
   7716     \ifcase\paramno
   7717     % 0
   7718       \expandafter\xdef\csname\the\macname\endcsname{%
   7719         \noexpand\norecurse{\the\macname}%
   7720         \noexpand\scanmacro{\temp}\egroup}%
   7721     \or % 1
   7722       \expandafter\xdef\csname\the\macname\endcsname{%
   7723          \bgroup\noexpand\macroargctxt
   7724          \noexpand\braceorline
   7725          \expandafter\noexpand\csname\the\macname xxx\endcsname}%
   7726       \expandafter\xdef\csname\the\macname xxx\endcsname##1{%
   7727         \egroup
   7728         \noexpand\norecurse{\the\macname}%
   7729         \noexpand\scanmacro{\temp}\egroup}%
   7730     \else % at most 9
   7731       \ifnum\paramno<10\relax
   7732         \expandafter\xdef\csname\the\macname\endcsname{%
   7733            \bgroup\noexpand\macroargctxt
   7734            \expandafter\noexpand\csname\the\macname xx\endcsname}%
   7735         \expandafter\xdef\csname\the\macname xx\endcsname##1{%
   7736             \expandafter\noexpand\csname\the\macname xxx\endcsname ##1,}%
   7737         \expandafter\expandafter
   7738         \expandafter\xdef
   7739         \expandafter\expandafter
   7740         \csname\the\macname xxx\endcsname
   7741         \paramlist{%
   7742             \egroup
   7743             \noexpand\norecurse{\the\macname}%
   7744             \noexpand\scanmacro{\temp}\egroup}%
   7745       \else % 10 or more:
   7746         \expandafter\xdef\csname\the\macname\endcsname{%
   7747           \noexpand\getargvals@{\the\macname}{\argl}%
   7748         }%
   7749         \global\expandafter\let\csname mac.\the\macname .body\endcsname\temp
   7750         \global\expandafter\let\csname mac.\the\macname .recurse\endcsname\norecurse
   7751       \fi
   7752     \fi
   7753   \fi}
   7754 
   7755 \catcode `\@\texiatcatcode\relax
   7756 
   7757 \def\norecurse#1{\bgroup\cslet{#1}{macsave.#1}}
   7758 
   7759 % \braceorline decides whether the next nonwhitespace character is a
   7760 % {.  If so it reads up to the closing }, if not, it reads the whole
   7761 % line.  Whatever was read is then fed to the next control sequence
   7762 % as an argument (by \parsebrace or \parsearg).
   7763 % 
   7764 \def\braceorline#1{\let\macnamexxx=#1\futurelet\nchar\braceorlinexxx}
   7765 \def\braceorlinexxx{%
   7766   \ifx\nchar\bgroup\else
   7767     \expandafter\parsearg
   7768   \fi \macnamexxx}
   7769 
   7770 
   7771 % @alias.
   7772 % We need some trickery to remove the optional spaces around the equal
   7773 % sign.  Make them active and then expand them all to nothing.
   7774 %
   7775 \def\alias{\parseargusing\obeyspaces\aliasxxx}
   7776 \def\aliasxxx #1{\aliasyyy#1\relax}
   7777 \def\aliasyyy #1=#2\relax{%
   7778   {%
   7779     \expandafter\let\obeyedspace=\empty
   7780     \addtomacrolist{#1}%
   7781     \xdef\next{\global\let\makecsname{#1}=\makecsname{#2}}%
   7782   }%
   7783   \next
   7784 }
   7785 
   7786 
   7787 \message{cross references,}
   7788 
   7789 \newwrite\auxfile
   7790 \newif\ifhavexrefs    % True if xref values are known.
   7791 \newif\ifwarnedxrefs  % True if we warned once that they aren't known.
   7792 
   7793 % @inforef is relatively simple.
   7794 \def\inforef #1{\inforefzzz #1,,,,**}
   7795 \def\inforefzzz #1,#2,#3,#4**{%
   7796   \putwordSee{} \putwordInfo{} \putwordfile{} \file{\ignorespaces #3{}},
   7797   node \samp{\ignorespaces#1{}}}
   7798 
   7799 % @node's only job in TeX is to define \lastnode, which is used in
   7800 % cross-references.  The @node line might or might not have commas, and
   7801 % might or might not have spaces before the first comma, like:
   7802 % @node foo , bar , ...
   7803 % We don't want such trailing spaces in the node name.
   7804 %
   7805 \parseargdef\node{\checkenv{}\donode #1 ,\finishnodeparse}
   7806 %
   7807 % also remove a trailing comma, in case of something like this:
   7808 % @node Help-Cross,  ,  , Cross-refs
   7809 \def\donode#1 ,#2\finishnodeparse{\dodonode #1,\finishnodeparse}
   7810 \def\dodonode#1,#2\finishnodeparse{\gdef\lastnode{#1}}
   7811 
   7812 \let\nwnode=\node
   7813 \let\lastnode=\empty
   7814 
   7815 % Write a cross-reference definition for the current node.  #1 is the
   7816 % type (Ynumbered, Yappendix, Ynothing).
   7817 %
   7818 \def\donoderef#1{%
   7819   \ifx\lastnode\empty\else
   7820     \setref{\lastnode}{#1}%
   7821     \global\let\lastnode=\empty
   7822   \fi
   7823 }
   7824 
   7825 % @anchor{NAME} -- define xref target at arbitrary point.
   7826 %
   7827 \newcount\savesfregister
   7828 %
   7829 \def\savesf{\relax \ifhmode \savesfregister=\spacefactor \fi}
   7830 \def\restoresf{\relax \ifhmode \spacefactor=\savesfregister \fi}
   7831 \def\anchor#1{\savesf \setref{#1}{Ynothing}\restoresf \ignorespaces}
   7832 
   7833 % \setref{NAME}{SNT} defines a cross-reference point NAME (a node or an
   7834 % anchor), which consists of three parts:
   7835 % 1) NAME-title - the current sectioning name taken from \lastsection,
   7836 %                 or the anchor name.
   7837 % 2) NAME-snt   - section number and type, passed as the SNT arg, or
   7838 %                 empty for anchors.
   7839 % 3) NAME-pg    - the page number.
   7840 %
   7841 % This is called from \donoderef, \anchor, and \dofloat.  In the case of
   7842 % floats, there is an additional part, which is not written here:
   7843 % 4) NAME-lof   - the text as it should appear in a @listoffloats.
   7844 %
   7845 \def\setref#1#2{%
   7846   \pdfmkdest{#1}%
   7847   \iflinks
   7848     {%
   7849       \atdummies  % preserve commands, but don't expand them
   7850       \edef\writexrdef##1##2{%
   7851 	\write\auxfile{@xrdef{#1-% #1 of \setref, expanded by the \edef
   7852 	  ##1}{##2}}% these are parameters of \writexrdef
   7853       }%
   7854       \toks0 = \expandafter{\lastsection}%
   7855       \immediate \writexrdef{title}{\the\toks0 }%
   7856       \immediate \writexrdef{snt}{\csname #2\endcsname}% \Ynumbered etc.
   7857       \safewhatsit{\writexrdef{pg}{\folio}}% will be written later, at \shipout
   7858     }%
   7859   \fi
   7860 }
   7861 
   7862 % @xrefautosectiontitle on|off says whether @section(ing) names are used
   7863 % automatically in xrefs, if the third arg is not explicitly specified.
   7864 % This was provided as a "secret" @set xref-automatic-section-title
   7865 % variable, now it's official.
   7866 % 
   7867 \parseargdef\xrefautomaticsectiontitle{%
   7868   \def\temp{#1}%
   7869   \ifx\temp\onword
   7870     \expandafter\let\csname SETxref-automatic-section-title\endcsname
   7871       = \empty
   7872   \else\ifx\temp\offword
   7873     \expandafter\let\csname SETxref-automatic-section-title\endcsname
   7874       = \relax
   7875   \else
   7876     \errhelp = \EMsimple
   7877     \errmessage{Unknown @xrefautomaticsectiontitle value `\temp',
   7878                 must be on|off}%
   7879   \fi\fi
   7880 }
   7881 
   7882 % 
   7884 % @xref, @pxref, and @ref generate cross-references.  For \xrefX, #1 is
   7885 % the node name, #2 the name of the Info cross-reference, #3 the printed
   7886 % node name, #4 the name of the Info file, #5 the name of the printed
   7887 % manual.  All but the node name can be omitted.
   7888 %
   7889 \def\pxref#1{\putwordsee{} \xrefX[#1,,,,,,,]}
   7890 \def\xref#1{\putwordSee{} \xrefX[#1,,,,,,,]}
   7891 \def\ref#1{\xrefX[#1,,,,,,,]}
   7892 %
   7893 \newbox\toprefbox
   7894 \newbox\printedrefnamebox
   7895 \newbox\infofilenamebox
   7896 \newbox\printedmanualbox
   7897 %
   7898 \def\xrefX[#1,#2,#3,#4,#5,#6]{\begingroup
   7899   \unsepspaces
   7900   %
   7901   % Get args without leading/trailing spaces.
   7902   \def\printedrefname{\ignorespaces #3}%
   7903   \setbox\printedrefnamebox = \hbox{\printedrefname\unskip}%
   7904   %
   7905   \def\infofilename{\ignorespaces #4}%
   7906   \setbox\infofilenamebox = \hbox{\infofilename\unskip}%
   7907   %
   7908   \def\printedmanual{\ignorespaces #5}%
   7909   \setbox\printedmanualbox  = \hbox{\printedmanual\unskip}%
   7910   %
   7911   % If the printed reference name (arg #3) was not explicitly given in
   7912   % the @xref, figure out what we want to use.
   7913   \ifdim \wd\printedrefnamebox = 0pt
   7914     % No printed node name was explicitly given.
   7915     \expandafter\ifx\csname SETxref-automatic-section-title\endcsname \relax
   7916       % Not auto section-title: use node name inside the square brackets.
   7917       \def\printedrefname{\ignorespaces #1}%
   7918     \else
   7919       % Auto section-title: use chapter/section title inside
   7920       % the square brackets if we have it.
   7921       \ifdim \wd\printedmanualbox > 0pt
   7922         % It is in another manual, so we don't have it; use node name.
   7923         \def\printedrefname{\ignorespaces #1}%
   7924       \else
   7925         \ifhavexrefs
   7926           % We (should) know the real title if we have the xref values.
   7927           \def\printedrefname{\refx{#1-title}{}}%
   7928         \else
   7929           % Otherwise just copy the Info node name.
   7930           \def\printedrefname{\ignorespaces #1}%
   7931         \fi%
   7932       \fi
   7933     \fi
   7934   \fi
   7935   %
   7936   % Make link in pdf output.
   7937   \ifpdf
   7938     {\indexnofonts
   7939      \turnoffactive
   7940      \makevalueexpandable
   7941      % This expands tokens, so do it after making catcode changes, so _
   7942      % etc. don't get their TeX definitions.  This ignores all spaces in
   7943      % #4, including (wrongly) those in the middle of the filename.
   7944      \getfilename{#4}%
   7945      %
   7946      % This (wrongly) does not take account of leading or trailing
   7947      % spaces in #1, which should be ignored.
   7948      \edef\pdfxrefdest{#1}%
   7949      \ifx\pdfxrefdest\empty
   7950        \def\pdfxrefdest{Top}% no empty targets
   7951      \else
   7952        \txiescapepdf\pdfxrefdest  % escape PDF special chars
   7953      \fi
   7954      %
   7955      \leavevmode
   7956      \startlink attr{/Border [0 0 0]}%
   7957      \ifnum\filenamelength>0
   7958        goto file{\the\filename.pdf} name{\pdfxrefdest}%
   7959      \else
   7960        goto name{\pdfmkpgn{\pdfxrefdest}}%
   7961      \fi
   7962     }%
   7963     \setcolor{\linkcolor}%
   7964   \fi
   7965   %
   7966   % Float references are printed completely differently: "Figure 1.2"
   7967   % instead of "[somenode], p.3".  We distinguish them by the
   7968   % LABEL-title being set to a magic string.
   7969   {%
   7970     % Have to otherify everything special to allow the \csname to
   7971     % include an _ in the xref name, etc.
   7972     \indexnofonts
   7973     \turnoffactive
   7974     \expandafter\global\expandafter\let\expandafter\Xthisreftitle
   7975       \csname XR#1-title\endcsname
   7976   }%
   7977   \iffloat\Xthisreftitle
   7978     % If the user specified the print name (third arg) to the ref,
   7979     % print it instead of our usual "Figure 1.2".
   7980     \ifdim\wd\printedrefnamebox = 0pt
   7981       \refx{#1-snt}{}%
   7982     \else
   7983       \printedrefname
   7984     \fi
   7985     %
   7986     % If the user also gave the printed manual name (fifth arg), append
   7987     % "in MANUALNAME".
   7988     \ifdim \wd\printedmanualbox > 0pt
   7989       \space \putwordin{} \cite{\printedmanual}%
   7990     \fi
   7991   \else
   7992     % node/anchor (non-float) references.
   7993     % 
   7994     % If we use \unhbox to print the node names, TeX does not insert
   7995     % empty discretionaries after hyphens, which means that it will not
   7996     % find a line break at a hyphen in a node names.  Since some manuals
   7997     % are best written with fairly long node names, containing hyphens,
   7998     % this is a loss.  Therefore, we give the text of the node name
   7999     % again, so it is as if TeX is seeing it for the first time.
   8000     % 
   8001     \ifdim \wd\printedmanualbox > 0pt
   8002       % Cross-manual reference with a printed manual name.
   8003       % 
   8004       \crossmanualxref{\cite{\printedmanual\unskip}}%
   8005     %
   8006     \else\ifdim \wd\infofilenamebox > 0pt
   8007       % Cross-manual reference with only an info filename (arg 4), no
   8008       % printed manual name (arg 5).  This is essentially the same as
   8009       % the case above; we output the filename, since we have nothing else.
   8010       % 
   8011       \crossmanualxref{\code{\infofilename\unskip}}%
   8012     %
   8013     \else
   8014       % Reference within this manual.
   8015       %
   8016       % _ (for example) has to be the character _ for the purposes of the
   8017       % control sequence corresponding to the node, but it has to expand
   8018       % into the usual \leavevmode...\vrule stuff for purposes of
   8019       % printing. So we \turnoffactive for the \refx-snt, back on for the
   8020       % printing, back off for the \refx-pg.
   8021       {\turnoffactive
   8022        % Only output a following space if the -snt ref is nonempty; for
   8023        % @unnumbered and @anchor, it won't be.
   8024        \setbox2 = \hbox{\ignorespaces \refx{#1-snt}{}}%
   8025        \ifdim \wd2 > 0pt \refx{#1-snt}\space\fi
   8026       }%
   8027       % output the `[mynode]' via the macro below so it can be overridden.
   8028       \xrefprintnodename\printedrefname
   8029       %
   8030       % But we always want a comma and a space:
   8031       ,\space
   8032       %
   8033       % output the `page 3'.
   8034       \turnoffactive \putwordpage\tie\refx{#1-pg}{}%
   8035     \fi\fi
   8036   \fi
   8037   \endlink
   8038 \endgroup}
   8039 
   8040 % Output a cross-manual xref to #1.  Used just above (twice).
   8041 % 
   8042 % Only include the text "Section ``foo'' in" if the foo is neither
   8043 % missing or Top.  Thus, @xref{,,,foo,The Foo Manual} outputs simply
   8044 % "see The Foo Manual", the idea being to refer to the whole manual.
   8045 % 
   8046 % But, this being TeX, we can't easily compare our node name against the
   8047 % string "Top" while ignoring the possible spaces before and after in
   8048 % the input.  By adding the arbitrary 7sp below, we make it much less
   8049 % likely that a real node name would have the same width as "Top" (e.g.,
   8050 % in a monospaced font).  Hopefully it will never happen in practice.
   8051 % 
   8052 % For the same basic reason, we retypeset the "Top" at every
   8053 % reference, since the current font is indeterminate.
   8054 % 
   8055 \def\crossmanualxref#1{%
   8056   \setbox\toprefbox = \hbox{Top\kern7sp}%
   8057   \setbox2 = \hbox{\ignorespaces \printedrefname \unskip \kern7sp}%
   8058   \ifdim \wd2 > 7sp  % nonempty?
   8059     \ifdim \wd2 = \wd\toprefbox \else  % same as Top?
   8060       \putwordSection{} ``\printedrefname'' \putwordin{}\space
   8061     \fi
   8062   \fi
   8063   #1%
   8064 }
   8065 
   8066 % This macro is called from \xrefX for the `[nodename]' part of xref
   8067 % output.  It's a separate macro only so it can be changed more easily,
   8068 % since square brackets don't work well in some documents.  Particularly
   8069 % one that Bob is working on :).
   8070 %
   8071 \def\xrefprintnodename#1{[#1]}
   8072 
   8073 % Things referred to by \setref.
   8074 %
   8075 \def\Ynothing{}
   8076 \def\Yomitfromtoc{}
   8077 \def\Ynumbered{%
   8078   \ifnum\secno=0
   8079     \putwordChapter@tie \the\chapno
   8080   \else \ifnum\subsecno=0
   8081     \putwordSection@tie \the\chapno.\the\secno
   8082   \else \ifnum\subsubsecno=0
   8083     \putwordSection@tie \the\chapno.\the\secno.\the\subsecno
   8084   \else
   8085     \putwordSection@tie \the\chapno.\the\secno.\the\subsecno.\the\subsubsecno
   8086   \fi\fi\fi
   8087 }
   8088 \def\Yappendix{%
   8089   \ifnum\secno=0
   8090      \putwordAppendix@tie @char\the\appendixno{}%
   8091   \else \ifnum\subsecno=0
   8092      \putwordSection@tie @char\the\appendixno.\the\secno
   8093   \else \ifnum\subsubsecno=0
   8094     \putwordSection@tie @char\the\appendixno.\the\secno.\the\subsecno
   8095   \else
   8096     \putwordSection@tie
   8097       @char\the\appendixno.\the\secno.\the\subsecno.\the\subsubsecno
   8098   \fi\fi\fi
   8099 }
   8100 
   8101 % Define \refx{NAME}{SUFFIX} to reference a cross-reference string named NAME.
   8102 % If its value is nonempty, SUFFIX is output afterward.
   8103 %
   8104 \def\refx#1#2{%
   8105   {%
   8106     \indexnofonts
   8107     \otherbackslash
   8108     \expandafter\global\expandafter\let\expandafter\thisrefX
   8109       \csname XR#1\endcsname
   8110   }%
   8111   \ifx\thisrefX\relax
   8112     % If not defined, say something at least.
   8113     \angleleft un\-de\-fined\angleright
   8114     \iflinks
   8115       \ifhavexrefs
   8116         {\toks0 = {#1}% avoid expansion of possibly-complex value
   8117          \message{\linenumber Undefined cross reference `\the\toks0'.}}%
   8118       \else
   8119         \ifwarnedxrefs\else
   8120           \global\warnedxrefstrue
   8121           \message{Cross reference values unknown; you must run TeX again.}%
   8122         \fi
   8123       \fi
   8124     \fi
   8125   \else
   8126     % It's defined, so just use it.
   8127     \thisrefX
   8128   \fi
   8129   #2% Output the suffix in any case.
   8130 }
   8131 
   8132 % This is the macro invoked by entries in the aux file.  Usually it's
   8133 % just a \def (we prepend XR to the control sequence name to avoid
   8134 % collisions).  But if this is a float type, we have more work to do.
   8135 %
   8136 \def\xrdef#1#2{%
   8137   {% The node name might contain 8-bit characters, which in our current
   8138    % implementation are changed to commands like @'e.  Don't let these
   8139    % mess up the control sequence name.
   8140     \indexnofonts
   8141     \turnoffactive
   8142     \xdef\safexrefname{#1}%
   8143   }%
   8144   %
   8145   \expandafter\gdef\csname XR\safexrefname\endcsname{#2}% remember this xref
   8146   %
   8147   % Was that xref control sequence that we just defined for a float?
   8148   \expandafter\iffloat\csname XR\safexrefname\endcsname
   8149     % it was a float, and we have the (safe) float type in \iffloattype.
   8150     \expandafter\let\expandafter\floatlist
   8151       \csname floatlist\iffloattype\endcsname
   8152     %
   8153     % Is this the first time we've seen this float type?
   8154     \expandafter\ifx\floatlist\relax
   8155       \toks0 = {\do}% yes, so just \do
   8156     \else
   8157       % had it before, so preserve previous elements in list.
   8158       \toks0 = \expandafter{\floatlist\do}%
   8159     \fi
   8160     %
   8161     % Remember this xref in the control sequence \floatlistFLOATTYPE,
   8162     % for later use in \listoffloats.
   8163     \expandafter\xdef\csname floatlist\iffloattype\endcsname{\the\toks0
   8164       {\safexrefname}}%
   8165   \fi
   8166 }
   8167 
   8168 % Read the last existing aux file, if any.  No error if none exists.
   8169 %
   8170 \def\tryauxfile{%
   8171   \openin 1 \jobname.aux
   8172   \ifeof 1 \else
   8173     \readdatafile{aux}%
   8174     \global\havexrefstrue
   8175   \fi
   8176   \closein 1
   8177 }
   8178 
   8179 \def\setupdatafile{%
   8180   \catcode`\^^@=\other
   8181   \catcode`\^^A=\other
   8182   \catcode`\^^B=\other
   8183   \catcode`\^^C=\other
   8184   \catcode`\^^D=\other
   8185   \catcode`\^^E=\other
   8186   \catcode`\^^F=\other
   8187   \catcode`\^^G=\other
   8188   \catcode`\^^H=\other
   8189   \catcode`\^^K=\other
   8190   \catcode`\^^L=\other
   8191   \catcode`\^^N=\other
   8192   \catcode`\^^P=\other
   8193   \catcode`\^^Q=\other
   8194   \catcode`\^^R=\other
   8195   \catcode`\^^S=\other
   8196   \catcode`\^^T=\other
   8197   \catcode`\^^U=\other
   8198   \catcode`\^^V=\other
   8199   \catcode`\^^W=\other
   8200   \catcode`\^^X=\other
   8201   \catcode`\^^Z=\other
   8202   \catcode`\^^[=\other
   8203   \catcode`\^^\=\other
   8204   \catcode`\^^]=\other
   8205   \catcode`\^^^=\other
   8206   \catcode`\^^_=\other
   8207   % It was suggested to set the catcode of ^ to 7, which would allow ^^e4 etc.
   8208   % in xref tags, i.e., node names.  But since ^^e4 notation isn't
   8209   % supported in the main text, it doesn't seem desirable.  Furthermore,
   8210   % that is not enough: for node names that actually contain a ^
   8211   % character, we would end up writing a line like this: 'xrdef {'hat
   8212   % b-title}{'hat b} and \xrdef does a \csname...\endcsname on the first
   8213   % argument, and \hat is not an expandable control sequence.  It could
   8214   % all be worked out, but why?  Either we support ^^ or we don't.
   8215   %
   8216   % The other change necessary for this was to define \auxhat:
   8217   % \def\auxhat{\def^{'hat }}% extra space so ok if followed by letter
   8218   % and then to call \auxhat in \setq.
   8219   %
   8220   \catcode`\^=\other
   8221   %
   8222   % Special characters.  Should be turned off anyway, but...
   8223   \catcode`\~=\other
   8224   \catcode`\[=\other
   8225   \catcode`\]=\other
   8226   \catcode`\"=\other
   8227   \catcode`\_=\other
   8228   \catcode`\|=\other
   8229   \catcode`\<=\other
   8230   \catcode`\>=\other
   8231   \catcode`\$=\other
   8232   \catcode`\#=\other
   8233   \catcode`\&=\other
   8234   \catcode`\%=\other
   8235   \catcode`+=\other % avoid \+ for paranoia even though we've turned it off
   8236   %
   8237   % This is to support \ in node names and titles, since the \
   8238   % characters end up in a \csname.  It's easier than
   8239   % leaving it active and making its active definition an actual \
   8240   % character.  What I don't understand is why it works in the *value*
   8241   % of the xrdef.  Seems like it should be a catcode12 \, and that
   8242   % should not typeset properly.  But it works, so I'm moving on for
   8243   % now.  --karl, 15jan04.
   8244   \catcode`\\=\other
   8245   %
   8246   % Make the characters 128-255 be printing characters.
   8247   {%
   8248     \count1=128
   8249     \def\loop{%
   8250       \catcode\count1=\other
   8251       \advance\count1 by 1
   8252       \ifnum \count1<256 \loop \fi
   8253     }%
   8254   }%
   8255   %
   8256   % @ is our escape character in .aux files, and we need braces.
   8257   \catcode`\{=1
   8258   \catcode`\}=2
   8259   \catcode`\@=0
   8260 }
   8261 
   8262 \def\readdatafile#1{%
   8263 \begingroup
   8264   \setupdatafile
   8265   \input\jobname.#1
   8266 \endgroup}
   8267 
   8268 
   8269 \message{insertions,}
   8270 % including footnotes.
   8271 
   8272 \newcount \footnoteno
   8273 
   8274 % The trailing space in the following definition for supereject is
   8275 % vital for proper filling; pages come out unaligned when you do a
   8276 % pagealignmacro call if that space before the closing brace is
   8277 % removed. (Generally, numeric constants should always be followed by a
   8278 % space to prevent strange expansion errors.)
   8279 \def\supereject{\par\penalty -20000\footnoteno =0 }
   8280 
   8281 % @footnotestyle is meaningful for Info output only.
   8282 \let\footnotestyle=\comment
   8283 
   8284 {\catcode `\@=11
   8285 %
   8286 % Auto-number footnotes.  Otherwise like plain.
   8287 \gdef\footnote{%
   8288   \let\indent=\ptexindent
   8289   \let\noindent=\ptexnoindent
   8290   \global\advance\footnoteno by \@ne
   8291   \edef\thisfootno{$^{\the\footnoteno}$}%
   8292   %
   8293   % In case the footnote comes at the end of a sentence, preserve the
   8294   % extra spacing after we do the footnote number.
   8295   \let\@sf\empty
   8296   \ifhmode\edef\@sf{\spacefactor\the\spacefactor}\ptexslash\fi
   8297   %
   8298   % Remove inadvertent blank space before typesetting the footnote number.
   8299   \unskip
   8300   \thisfootno\@sf
   8301   \dofootnote
   8302 }%
   8303 
   8304 % Don't bother with the trickery in plain.tex to not require the
   8305 % footnote text as a parameter.  Our footnotes don't need to be so general.
   8306 %
   8307 % Oh yes, they do; otherwise, @ifset (and anything else that uses
   8308 % \parseargline) fails inside footnotes because the tokens are fixed when
   8309 % the footnote is read.  --karl, 16nov96.
   8310 %
   8311 \gdef\dofootnote{%
   8312   \insert\footins\bgroup
   8313   % We want to typeset this text as a normal paragraph, even if the
   8314   % footnote reference occurs in (for example) a display environment.
   8315   % So reset some parameters.
   8316   \hsize=\pagewidth
   8317   \interlinepenalty\interfootnotelinepenalty
   8318   \splittopskip\ht\strutbox % top baseline for broken footnotes
   8319   \splitmaxdepth\dp\strutbox
   8320   \floatingpenalty\@MM
   8321   \leftskip\z@skip
   8322   \rightskip\z@skip
   8323   \spaceskip\z@skip
   8324   \xspaceskip\z@skip
   8325   \parindent\defaultparindent
   8326   %
   8327   \smallfonts \rm
   8328   %
   8329   % Because we use hanging indentation in footnotes, a @noindent appears
   8330   % to exdent this text, so make it be a no-op.  makeinfo does not use
   8331   % hanging indentation so @noindent can still be needed within footnote
   8332   % text after an @example or the like (not that this is good style).
   8333   \let\noindent = \relax
   8334   %
   8335   % Hang the footnote text off the number.  Use \everypar in case the
   8336   % footnote extends for more than one paragraph.
   8337   \everypar = {\hang}%
   8338   \textindent{\thisfootno}%
   8339   %
   8340   % Don't crash into the line above the footnote text.  Since this
   8341   % expands into a box, it must come within the paragraph, lest it
   8342   % provide a place where TeX can split the footnote.
   8343   \footstrut
   8344   %
   8345   % Invoke rest of plain TeX footnote routine.
   8346   \futurelet\next\fo@t
   8347 }
   8348 }%end \catcode `\@=11
   8349 
   8350 % In case a @footnote appears in a vbox, save the footnote text and create
   8351 % the real \insert just after the vbox finished.  Otherwise, the insertion
   8352 % would be lost.
   8353 % Similarly, if a @footnote appears inside an alignment, save the footnote
   8354 % text to a box and make the \insert when a row of the table is finished.
   8355 % And the same can be done for other insert classes.  --kasal, 16nov03.
   8356 
   8357 % Replace the \insert primitive by a cheating macro.
   8358 % Deeper inside, just make sure that the saved insertions are not spilled
   8359 % out prematurely.
   8360 %
   8361 \def\startsavinginserts{%
   8362   \ifx \insert\ptexinsert
   8363     \let\insert\saveinsert
   8364   \else
   8365     \let\checkinserts\relax
   8366   \fi
   8367 }
   8368 
   8369 % This \insert replacement works for both \insert\footins{foo} and
   8370 % \insert\footins\bgroup foo\egroup, but it doesn't work for \insert27{foo}.
   8371 %
   8372 \def\saveinsert#1{%
   8373   \edef\next{\noexpand\savetobox \makeSAVEname#1}%
   8374   \afterassignment\next
   8375   % swallow the left brace
   8376   \let\temp =
   8377 }
   8378 \def\makeSAVEname#1{\makecsname{SAVE\expandafter\gobble\string#1}}
   8379 \def\savetobox#1{\global\setbox#1 = \vbox\bgroup \unvbox#1}
   8380 
   8381 \def\checksaveins#1{\ifvoid#1\else \placesaveins#1\fi}
   8382 
   8383 \def\placesaveins#1{%
   8384   \ptexinsert \csname\expandafter\gobblesave\string#1\endcsname
   8385     {\box#1}%
   8386 }
   8387 
   8388 % eat @SAVE -- beware, all of them have catcode \other:
   8389 {
   8390   \def\dospecials{\do S\do A\do V\do E} \uncatcodespecials  %  ;-)
   8391   \gdef\gobblesave @SAVE{}
   8392 }
   8393 
   8394 % initialization:
   8395 \def\newsaveins #1{%
   8396   \edef\next{\noexpand\newsaveinsX \makeSAVEname#1}%
   8397   \next
   8398 }
   8399 \def\newsaveinsX #1{%
   8400   \csname newbox\endcsname #1%
   8401   \expandafter\def\expandafter\checkinserts\expandafter{\checkinserts
   8402     \checksaveins #1}%
   8403 }
   8404 
   8405 % initialize:
   8406 \let\checkinserts\empty
   8407 \newsaveins\footins
   8408 \newsaveins\margin
   8409 
   8410 
   8411 % @image.  We use the macros from epsf.tex to support this.
   8412 % If epsf.tex is not installed and @image is used, we complain.
   8413 %
   8414 % Check for and read epsf.tex up front.  If we read it only at @image
   8415 % time, we might be inside a group, and then its definitions would get
   8416 % undone and the next image would fail.
   8417 \openin 1 = epsf.tex
   8418 \ifeof 1 \else
   8419   % Do not bother showing banner with epsf.tex v2.7k (available in
   8420   % doc/epsf.tex and on ctan).
   8421   \def\epsfannounce{\toks0 = }%
   8422   \input epsf.tex
   8423 \fi
   8424 \closein 1
   8425 %
   8426 % We will only complain once about lack of epsf.tex.
   8427 \newif\ifwarnednoepsf
   8428 \newhelp\noepsfhelp{epsf.tex must be installed for images to
   8429   work.  It is also included in the Texinfo distribution, or you can get
   8430   it from ftp://tug.org/tex/epsf.tex.}
   8431 %
   8432 \def\image#1{%
   8433   \ifx\epsfbox\thisisundefined
   8434     \ifwarnednoepsf \else
   8435       \errhelp = \noepsfhelp
   8436       \errmessage{epsf.tex not found, images will be ignored}%
   8437       \global\warnednoepsftrue
   8438     \fi
   8439   \else
   8440     \imagexxx #1,,,,,\finish
   8441   \fi
   8442 }
   8443 %
   8444 % Arguments to @image:
   8445 % #1 is (mandatory) image filename; we tack on .eps extension.
   8446 % #2 is (optional) width, #3 is (optional) height.
   8447 % #4 is (ignored optional) html alt text.
   8448 % #5 is (ignored optional) extension.
   8449 % #6 is just the usual extra ignored arg for parsing stuff.
   8450 \newif\ifimagevmode
   8451 \def\imagexxx#1,#2,#3,#4,#5,#6\finish{\begingroup
   8452   \catcode`\^^M = 5     % in case we're inside an example
   8453   \normalturnoffactive  % allow _ et al. in names
   8454   % If the image is by itself, center it.
   8455   \ifvmode
   8456     \imagevmodetrue
   8457   \else \ifx\centersub\centerV
   8458     % for @center @image, we need a vbox so we can have our vertical space
   8459     \imagevmodetrue
   8460     \vbox\bgroup % vbox has better behavior than vtop herev
   8461   \fi\fi
   8462   %
   8463   \ifimagevmode
   8464     \nobreak\medskip
   8465     % Usually we'll have text after the image which will insert
   8466     % \parskip glue, so insert it here too to equalize the space
   8467     % above and below.
   8468     \nobreak\vskip\parskip
   8469     \nobreak
   8470   \fi
   8471   %
   8472   % Leave vertical mode so that indentation from an enclosing
   8473   %  environment such as @quotation is respected.
   8474   % However, if we're at the top level, we don't want the
   8475   %  normal paragraph indentation.
   8476   % On the other hand, if we are in the case of @center @image, we don't
   8477   %  want to start a paragraph, which will create a hsize-width box and
   8478   %  eradicate the centering.
   8479   \ifx\centersub\centerV\else \noindent \fi
   8480   %
   8481   % Output the image.
   8482   \ifpdf
   8483     \dopdfimage{#1}{#2}{#3}%
   8484   \else
   8485     % \epsfbox itself resets \epsf?size at each figure.
   8486     \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \epsfxsize=#2\relax \fi
   8487     \setbox0 = \hbox{\ignorespaces #3}\ifdim\wd0 > 0pt \epsfysize=#3\relax \fi
   8488     \epsfbox{#1.eps}%
   8489   \fi
   8490   %
   8491   \ifimagevmode
   8492     \medskip  % space after a standalone image
   8493   \fi  
   8494   \ifx\centersub\centerV \egroup \fi
   8495 \endgroup}
   8496 
   8497 
   8498 % @float FLOATTYPE,LABEL,LOC ... @end float for displayed figures, tables,
   8499 % etc.  We don't actually implement floating yet, we always include the
   8500 % float "here".  But it seemed the best name for the future.
   8501 %
   8502 \envparseargdef\float{\eatcommaspace\eatcommaspace\dofloat#1, , ,\finish}
   8503 
   8504 % There may be a space before second and/or third parameter; delete it.
   8505 \def\eatcommaspace#1, {#1,}
   8506 
   8507 % #1 is the optional FLOATTYPE, the text label for this float, typically
   8508 % "Figure", "Table", "Example", etc.  Can't contain commas.  If omitted,
   8509 % this float will not be numbered and cannot be referred to.
   8510 %
   8511 % #2 is the optional xref label.  Also must be present for the float to
   8512 % be referable.
   8513 %
   8514 % #3 is the optional positioning argument; for now, it is ignored.  It
   8515 % will somehow specify the positions allowed to float to (here, top, bottom).
   8516 %
   8517 % We keep a separate counter for each FLOATTYPE, which we reset at each
   8518 % chapter-level command.
   8519 \let\resetallfloatnos=\empty
   8520 %
   8521 \def\dofloat#1,#2,#3,#4\finish{%
   8522   \let\thiscaption=\empty
   8523   \let\thisshortcaption=\empty
   8524   %
   8525   % don't lose footnotes inside @float.
   8526   %
   8527   % BEWARE: when the floats start float, we have to issue warning whenever an
   8528   % insert appears inside a float which could possibly float. --kasal, 26may04
   8529   %
   8530   \startsavinginserts
   8531   %
   8532   % We can't be used inside a paragraph.
   8533   \par
   8534   %
   8535   \vtop\bgroup
   8536     \def\floattype{#1}%
   8537     \def\floatlabel{#2}%
   8538     \def\floatloc{#3}% we do nothing with this yet.
   8539     %
   8540     \ifx\floattype\empty
   8541       \let\safefloattype=\empty
   8542     \else
   8543       {%
   8544         % the floattype might have accents or other special characters,
   8545         % but we need to use it in a control sequence name.
   8546         \indexnofonts
   8547         \turnoffactive
   8548         \xdef\safefloattype{\floattype}%
   8549       }%
   8550     \fi
   8551     %
   8552     % If label is given but no type, we handle that as the empty type.
   8553     \ifx\floatlabel\empty \else
   8554       % We want each FLOATTYPE to be numbered separately (Figure 1,
   8555       % Table 1, Figure 2, ...).  (And if no label, no number.)
   8556       %
   8557       \expandafter\getfloatno\csname\safefloattype floatno\endcsname
   8558       \global\advance\floatno by 1
   8559       %
   8560       {%
   8561         % This magic value for \lastsection is output by \setref as the
   8562         % XREFLABEL-title value.  \xrefX uses it to distinguish float
   8563         % labels (which have a completely different output format) from
   8564         % node and anchor labels.  And \xrdef uses it to construct the
   8565         % lists of floats.
   8566         %
   8567         \edef\lastsection{\floatmagic=\safefloattype}%
   8568         \setref{\floatlabel}{Yfloat}%
   8569       }%
   8570     \fi
   8571     %
   8572     % start with \parskip glue, I guess.
   8573     \vskip\parskip
   8574     %
   8575     % Don't suppress indentation if a float happens to start a section.
   8576     \restorefirstparagraphindent
   8577 }
   8578 
   8579 % we have these possibilities:
   8580 % @float Foo,lbl & @caption{Cap}: Foo 1.1: Cap
   8581 % @float Foo,lbl & no caption:    Foo 1.1
   8582 % @float Foo & @caption{Cap}:     Foo: Cap
   8583 % @float Foo & no caption:        Foo
   8584 % @float ,lbl & Caption{Cap}:     1.1: Cap
   8585 % @float ,lbl & no caption:       1.1
   8586 % @float & @caption{Cap}:         Cap
   8587 % @float & no caption:
   8588 %
   8589 \def\Efloat{%
   8590     \let\floatident = \empty
   8591     %
   8592     % In all cases, if we have a float type, it comes first.
   8593     \ifx\floattype\empty \else \def\floatident{\floattype}\fi
   8594     %
   8595     % If we have an xref label, the number comes next.
   8596     \ifx\floatlabel\empty \else
   8597       \ifx\floattype\empty \else % if also had float type, need tie first.
   8598         \appendtomacro\floatident{\tie}%
   8599       \fi
   8600       % the number.
   8601       \appendtomacro\floatident{\chaplevelprefix\the\floatno}%
   8602     \fi
   8603     %
   8604     % Start the printed caption with what we've constructed in
   8605     % \floatident, but keep it separate; we need \floatident again.
   8606     \let\captionline = \floatident
   8607     %
   8608     \ifx\thiscaption\empty \else
   8609       \ifx\floatident\empty \else
   8610 	\appendtomacro\captionline{: }% had ident, so need a colon between
   8611       \fi
   8612       %
   8613       % caption text.
   8614       \appendtomacro\captionline{\scanexp\thiscaption}%
   8615     \fi
   8616     %
   8617     % If we have anything to print, print it, with space before.
   8618     % Eventually this needs to become an \insert.
   8619     \ifx\captionline\empty \else
   8620       \vskip.5\parskip
   8621       \captionline
   8622       %
   8623       % Space below caption.
   8624       \vskip\parskip
   8625     \fi
   8626     %
   8627     % If have an xref label, write the list of floats info.  Do this
   8628     % after the caption, to avoid chance of it being a breakpoint.
   8629     \ifx\floatlabel\empty \else
   8630       % Write the text that goes in the lof to the aux file as
   8631       % \floatlabel-lof.  Besides \floatident, we include the short
   8632       % caption if specified, else the full caption if specified, else nothing.
   8633       {%
   8634         \atdummies
   8635         %
   8636         % since we read the caption text in the macro world, where ^^M
   8637         % is turned into a normal character, we have to scan it back, so
   8638         % we don't write the literal three characters "^^M" into the aux file.
   8639 	\scanexp{%
   8640 	  \xdef\noexpand\gtemp{%
   8641 	    \ifx\thisshortcaption\empty
   8642 	      \thiscaption
   8643 	    \else
   8644 	      \thisshortcaption
   8645 	    \fi
   8646 	  }%
   8647 	}%
   8648         \immediate\write\auxfile{@xrdef{\floatlabel-lof}{\floatident
   8649 	  \ifx\gtemp\empty \else : \gtemp \fi}}%
   8650       }%
   8651     \fi
   8652   \egroup  % end of \vtop
   8653   %
   8654   % place the captured inserts
   8655   %
   8656   % BEWARE: when the floats start floating, we have to issue warning
   8657   % whenever an insert appears inside a float which could possibly
   8658   % float. --kasal, 26may04
   8659   %
   8660   \checkinserts
   8661 }
   8662 
   8663 % Append the tokens #2 to the definition of macro #1, not expanding either.
   8664 %
   8665 \def\appendtomacro#1#2{%
   8666   \expandafter\def\expandafter#1\expandafter{#1#2}%
   8667 }
   8668 
   8669 % @caption, @shortcaption
   8670 %
   8671 \def\caption{\docaption\thiscaption}
   8672 \def\shortcaption{\docaption\thisshortcaption}
   8673 \def\docaption{\checkenv\float \bgroup\scanargctxt\defcaption}
   8674 \def\defcaption#1#2{\egroup \def#1{#2}}
   8675 
   8676 % The parameter is the control sequence identifying the counter we are
   8677 % going to use.  Create it if it doesn't exist and assign it to \floatno.
   8678 \def\getfloatno#1{%
   8679   \ifx#1\relax
   8680       % Haven't seen this figure type before.
   8681       \csname newcount\endcsname #1%
   8682       %
   8683       % Remember to reset this floatno at the next chap.
   8684       \expandafter\gdef\expandafter\resetallfloatnos
   8685         \expandafter{\resetallfloatnos #1=0 }%
   8686   \fi
   8687   \let\floatno#1%
   8688 }
   8689 
   8690 % \setref calls this to get the XREFLABEL-snt value.  We want an @xref
   8691 % to the FLOATLABEL to expand to "Figure 3.1".  We call \setref when we
   8692 % first read the @float command.
   8693 %
   8694 \def\Yfloat{\floattype@tie \chaplevelprefix\the\floatno}%
   8695 
   8696 % Magic string used for the XREFLABEL-title value, so \xrefX can
   8697 % distinguish floats from other xref types.
   8698 \def\floatmagic{!!float!!}
   8699 
   8700 % #1 is the control sequence we are passed; we expand into a conditional
   8701 % which is true if #1 represents a float ref.  That is, the magic
   8702 % \lastsection value which we \setref above.
   8703 %
   8704 \def\iffloat#1{\expandafter\doiffloat#1==\finish}
   8705 %
   8706 % #1 is (maybe) the \floatmagic string.  If so, #2 will be the
   8707 % (safe) float type for this float.  We set \iffloattype to #2.
   8708 %
   8709 \def\doiffloat#1=#2=#3\finish{%
   8710   \def\temp{#1}%
   8711   \def\iffloattype{#2}%
   8712   \ifx\temp\floatmagic
   8713 }
   8714 
   8715 % @listoffloats FLOATTYPE - print a list of floats like a table of contents.
   8716 %
   8717 \parseargdef\listoffloats{%
   8718   \def\floattype{#1}% floattype
   8719   {%
   8720     % the floattype might have accents or other special characters,
   8721     % but we need to use it in a control sequence name.
   8722     \indexnofonts
   8723     \turnoffactive
   8724     \xdef\safefloattype{\floattype}%
   8725   }%
   8726   %
   8727   % \xrdef saves the floats as a \do-list in \floatlistSAFEFLOATTYPE.
   8728   \expandafter\ifx\csname floatlist\safefloattype\endcsname \relax
   8729     \ifhavexrefs
   8730       % if the user said @listoffloats foo but never @float foo.
   8731       \message{\linenumber No `\safefloattype' floats to list.}%
   8732     \fi
   8733   \else
   8734     \begingroup
   8735       \leftskip=\tocindent  % indent these entries like a toc
   8736       \let\do=\listoffloatsdo
   8737       \csname floatlist\safefloattype\endcsname
   8738     \endgroup
   8739   \fi
   8740 }
   8741 
   8742 % This is called on each entry in a list of floats.  We're passed the
   8743 % xref label, in the form LABEL-title, which is how we save it in the
   8744 % aux file.  We strip off the -title and look up \XRLABEL-lof, which
   8745 % has the text we're supposed to typeset here.
   8746 %
   8747 % Figures without xref labels will not be included in the list (since
   8748 % they won't appear in the aux file).
   8749 %
   8750 \def\listoffloatsdo#1{\listoffloatsdoentry#1\finish}
   8751 \def\listoffloatsdoentry#1-title\finish{{%
   8752   % Can't fully expand XR#1-lof because it can contain anything.  Just
   8753   % pass the control sequence.  On the other hand, XR#1-pg is just the
   8754   % page number, and we want to fully expand that so we can get a link
   8755   % in pdf output.
   8756   \toksA = \expandafter{\csname XR#1-lof\endcsname}%
   8757   %
   8758   % use the same \entry macro we use to generate the TOC and index.
   8759   \edef\writeentry{\noexpand\entry{\the\toksA}{\csname XR#1-pg\endcsname}}%
   8760   \writeentry
   8761 }}
   8762 
   8763 
   8764 \message{localization,}
   8765 
   8766 % For single-language documents, @documentlanguage is usually given very
   8767 % early, just after @documentencoding.  Single argument is the language
   8768 % (de) or locale (de_DE) abbreviation.
   8769 %
   8770 {
   8771   \catcode`\_ = \active
   8772   \globaldefs=1
   8773 \parseargdef\documentlanguage{\begingroup
   8774   \let_=\normalunderscore  % normal _ character for filenames
   8775   \tex % read txi-??.tex file in plain TeX.
   8776     % Read the file by the name they passed if it exists.
   8777     \openin 1 txi-#1.tex
   8778     \ifeof 1
   8779       \documentlanguagetrywithoutunderscore{#1_\finish}%
   8780     \else
   8781       \globaldefs = 1  % everything in the txi-LL files needs to persist
   8782       \input txi-#1.tex
   8783     \fi
   8784     \closein 1
   8785   \endgroup % end raw TeX
   8786 \endgroup}
   8787 %
   8788 % If they passed de_DE, and txi-de_DE.tex doesn't exist,
   8789 % try txi-de.tex.
   8790 %
   8791 \gdef\documentlanguagetrywithoutunderscore#1_#2\finish{%
   8792   \openin 1 txi-#1.tex
   8793   \ifeof 1
   8794     \errhelp = \nolanghelp
   8795     \errmessage{Cannot read language file txi-#1.tex}%
   8796   \else
   8797     \globaldefs = 1  % everything in the txi-LL files needs to persist
   8798     \input txi-#1.tex
   8799   \fi
   8800   \closein 1
   8801 }
   8802 }% end of special _ catcode
   8803 %
   8804 \newhelp\nolanghelp{The given language definition file cannot be found or
   8805 is empty.  Maybe you need to install it?  Putting it in the current
   8806 directory should work if nowhere else does.}
   8807 
   8808 % This macro is called from txi-??.tex files; the first argument is the
   8809 % \language name to set (without the "\lang@" prefix), the second and
   8810 % third args are \{left,right}hyphenmin.
   8811 %
   8812 % The language names to pass are determined when the format is built.
   8813 % See the etex.log file created at that time, e.g.,
   8814 % /usr/local/texlive/2008/texmf-var/web2c/pdftex/etex.log.
   8815 %
   8816 % With TeX Live 2008, etex now includes hyphenation patterns for all
   8817 % available languages.  This means we can support hyphenation in
   8818 % Texinfo, at least to some extent.  (This still doesn't solve the
   8819 % accented characters problem.)
   8820 %
   8821 \catcode`@=11
   8822 \def\txisetlanguage#1#2#3{%
   8823   % do not set the language if the name is undefined in the current TeX.
   8824   \expandafter\ifx\csname lang@#1\endcsname \relax
   8825     \message{no patterns for #1}%
   8826   \else
   8827     \global\language = \csname lang@#1\endcsname
   8828   \fi
   8829   % but there is no harm in adjusting the hyphenmin values regardless.
   8830   \global\lefthyphenmin = #2\relax
   8831   \global\righthyphenmin = #3\relax
   8832 }
   8833 
   8834 % Helpers for encodings.
   8835 % Set the catcode of characters 128 through 255 to the specified number.
   8836 %
   8837 \def\setnonasciicharscatcode#1{%
   8838    \count255=128
   8839    \loop\ifnum\count255<256
   8840       \global\catcode\count255=#1\relax
   8841       \advance\count255 by 1
   8842    \repeat
   8843 }
   8844 
   8845 \def\setnonasciicharscatcodenonglobal#1{%
   8846    \count255=128
   8847    \loop\ifnum\count255<256
   8848       \catcode\count255=#1\relax
   8849       \advance\count255 by 1
   8850    \repeat
   8851 }
   8852 
   8853 % @documentencoding sets the definition of non-ASCII characters
   8854 % according to the specified encoding.
   8855 %
   8856 \parseargdef\documentencoding{%
   8857   % Encoding being declared for the document.
   8858   \def\declaredencoding{\csname #1.enc\endcsname}%
   8859   %
   8860   % Supported encodings: names converted to tokens in order to be able
   8861   % to compare them with \ifx.
   8862   \def\ascii{\csname US-ASCII.enc\endcsname}%
   8863   \def\latnine{\csname ISO-8859-15.enc\endcsname}%
   8864   \def\latone{\csname ISO-8859-1.enc\endcsname}%
   8865   \def\lattwo{\csname ISO-8859-2.enc\endcsname}%
   8866   \def\utfeight{\csname UTF-8.enc\endcsname}%
   8867   %
   8868   \ifx \declaredencoding \ascii
   8869      \asciichardefs
   8870   %
   8871   \else \ifx \declaredencoding \lattwo
   8872      \setnonasciicharscatcode\active
   8873      \lattwochardefs
   8874   %
   8875   \else \ifx \declaredencoding \latone
   8876      \setnonasciicharscatcode\active
   8877      \latonechardefs
   8878   %
   8879   \else \ifx \declaredencoding \latnine
   8880      \setnonasciicharscatcode\active
   8881      \latninechardefs
   8882   %
   8883   \else \ifx \declaredencoding \utfeight
   8884      \setnonasciicharscatcode\active
   8885      \utfeightchardefs
   8886   %
   8887   \else
   8888     \message{Unknown document encoding #1, ignoring.}%
   8889   %
   8890   \fi % utfeight
   8891   \fi % latnine
   8892   \fi % latone
   8893   \fi % lattwo
   8894   \fi % ascii
   8895 }
   8896 
   8897 % A message to be logged when using a character that isn't available
   8898 % the default font encoding (OT1).
   8899 %
   8900 \def\missingcharmsg#1{\message{Character missing in OT1 encoding: #1.}}
   8901 
   8902 % Take account of \c (plain) vs. \, (Texinfo) difference.
   8903 \def\cedilla#1{\ifx\c\ptexc\c{#1}\else\,{#1}\fi}
   8904 
   8905 % First, make active non-ASCII characters in order for them to be
   8906 % correctly categorized when TeX reads the replacement text of
   8907 % macros containing the character definitions.
   8908 \setnonasciicharscatcode\active
   8909 %
   8910 % Latin1 (ISO-8859-1) character definitions.
   8911 \def\latonechardefs{%
   8912   \gdef^^a0{\tie}
   8913   \gdef^^a1{\exclamdown}
   8914   \gdef^^a2{\missingcharmsg{CENT SIGN}}
   8915   \gdef^^a3{{\pounds}}
   8916   \gdef^^a4{\missingcharmsg{CURRENCY SIGN}}
   8917   \gdef^^a5{\missingcharmsg{YEN SIGN}}
   8918   \gdef^^a6{\missingcharmsg{BROKEN BAR}}
   8919   \gdef^^a7{\S}
   8920   \gdef^^a8{\"{}}
   8921   \gdef^^a9{\copyright}
   8922   \gdef^^aa{\ordf}
   8923   \gdef^^ab{\guillemetleft}
   8924   \gdef^^ac{$\lnot$}
   8925   \gdef^^ad{\-}
   8926   \gdef^^ae{\registeredsymbol}
   8927   \gdef^^af{\={}}
   8928   %
   8929   \gdef^^b0{\textdegree}
   8930   \gdef^^b1{$\pm$}
   8931   \gdef^^b2{$^2$}
   8932   \gdef^^b3{$^3$}
   8933   \gdef^^b4{\'{}}
   8934   \gdef^^b5{$\mu$}
   8935   \gdef^^b6{\P}
   8936   %
   8937   \gdef^^b7{$^.$}
   8938   \gdef^^b8{\cedilla\ }
   8939   \gdef^^b9{$^1$}
   8940   \gdef^^ba{\ordm}
   8941   %
   8942   \gdef^^bb{\guillemetright}
   8943   \gdef^^bc{$1\over4$}
   8944   \gdef^^bd{$1\over2$}
   8945   \gdef^^be{$3\over4$}
   8946   \gdef^^bf{\questiondown}
   8947   %
   8948   \gdef^^c0{\`A}
   8949   \gdef^^c1{\'A}
   8950   \gdef^^c2{\^A}
   8951   \gdef^^c3{\~A}
   8952   \gdef^^c4{\"A}
   8953   \gdef^^c5{\ringaccent A}
   8954   \gdef^^c6{\AE}
   8955   \gdef^^c7{\cedilla C}
   8956   \gdef^^c8{\`E}
   8957   \gdef^^c9{\'E}
   8958   \gdef^^ca{\^E}
   8959   \gdef^^cb{\"E}
   8960   \gdef^^cc{\`I}
   8961   \gdef^^cd{\'I}
   8962   \gdef^^ce{\^I}
   8963   \gdef^^cf{\"I}
   8964   %
   8965   \gdef^^d0{\DH}
   8966   \gdef^^d1{\~N}
   8967   \gdef^^d2{\`O}
   8968   \gdef^^d3{\'O}
   8969   \gdef^^d4{\^O}
   8970   \gdef^^d5{\~O}
   8971   \gdef^^d6{\"O}
   8972   \gdef^^d7{$\times$}
   8973   \gdef^^d8{\O}
   8974   \gdef^^d9{\`U}
   8975   \gdef^^da{\'U}
   8976   \gdef^^db{\^U}
   8977   \gdef^^dc{\"U}
   8978   \gdef^^dd{\'Y}
   8979   \gdef^^de{\TH}
   8980   \gdef^^df{\ss}
   8981   %
   8982   \gdef^^e0{\`a}
   8983   \gdef^^e1{\'a}
   8984   \gdef^^e2{\^a}
   8985   \gdef^^e3{\~a}
   8986   \gdef^^e4{\"a}
   8987   \gdef^^e5{\ringaccent a}
   8988   \gdef^^e6{\ae}
   8989   \gdef^^e7{\cedilla c}
   8990   \gdef^^e8{\`e}
   8991   \gdef^^e9{\'e}
   8992   \gdef^^ea{\^e}
   8993   \gdef^^eb{\"e}
   8994   \gdef^^ec{\`{\dotless i}}
   8995   \gdef^^ed{\'{\dotless i}}
   8996   \gdef^^ee{\^{\dotless i}}
   8997   \gdef^^ef{\"{\dotless i}}
   8998   %
   8999   \gdef^^f0{\dh}
   9000   \gdef^^f1{\~n}
   9001   \gdef^^f2{\`o}
   9002   \gdef^^f3{\'o}
   9003   \gdef^^f4{\^o}
   9004   \gdef^^f5{\~o}
   9005   \gdef^^f6{\"o}
   9006   \gdef^^f7{$\div$}
   9007   \gdef^^f8{\o}
   9008   \gdef^^f9{\`u}
   9009   \gdef^^fa{\'u}
   9010   \gdef^^fb{\^u}
   9011   \gdef^^fc{\"u}
   9012   \gdef^^fd{\'y}
   9013   \gdef^^fe{\th}
   9014   \gdef^^ff{\"y}
   9015 }
   9016 
   9017 % Latin9 (ISO-8859-15) encoding character definitions.
   9018 \def\latninechardefs{%
   9019   % Encoding is almost identical to Latin1.
   9020   \latonechardefs
   9021   %
   9022   \gdef^^a4{\euro}
   9023   \gdef^^a6{\v S}
   9024   \gdef^^a8{\v s}
   9025   \gdef^^b4{\v Z}
   9026   \gdef^^b8{\v z}
   9027   \gdef^^bc{\OE}
   9028   \gdef^^bd{\oe}
   9029   \gdef^^be{\"Y}
   9030 }
   9031 
   9032 % Latin2 (ISO-8859-2) character definitions.
   9033 \def\lattwochardefs{%
   9034   \gdef^^a0{\tie}
   9035   \gdef^^a1{\ogonek{A}}
   9036   \gdef^^a2{\u{}}
   9037   \gdef^^a3{\L}
   9038   \gdef^^a4{\missingcharmsg{CURRENCY SIGN}}
   9039   \gdef^^a5{\v L}
   9040   \gdef^^a6{\'S}
   9041   \gdef^^a7{\S}
   9042   \gdef^^a8{\"{}}
   9043   \gdef^^a9{\v S}
   9044   \gdef^^aa{\cedilla S}
   9045   \gdef^^ab{\v T}
   9046   \gdef^^ac{\'Z}
   9047   \gdef^^ad{\-}
   9048   \gdef^^ae{\v Z}
   9049   \gdef^^af{\dotaccent Z}
   9050   %
   9051   \gdef^^b0{\textdegree}
   9052   \gdef^^b1{\ogonek{a}}
   9053   \gdef^^b2{\ogonek{ }}
   9054   \gdef^^b3{\l}
   9055   \gdef^^b4{\'{}}
   9056   \gdef^^b5{\v l}
   9057   \gdef^^b6{\'s}
   9058   \gdef^^b7{\v{}}
   9059   \gdef^^b8{\cedilla\ }
   9060   \gdef^^b9{\v s}
   9061   \gdef^^ba{\cedilla s}
   9062   \gdef^^bb{\v t}
   9063   \gdef^^bc{\'z}
   9064   \gdef^^bd{\H{}}
   9065   \gdef^^be{\v z}
   9066   \gdef^^bf{\dotaccent z}
   9067   %
   9068   \gdef^^c0{\'R}
   9069   \gdef^^c1{\'A}
   9070   \gdef^^c2{\^A}
   9071   \gdef^^c3{\u A}
   9072   \gdef^^c4{\"A}
   9073   \gdef^^c5{\'L}
   9074   \gdef^^c6{\'C}
   9075   \gdef^^c7{\cedilla C}
   9076   \gdef^^c8{\v C}
   9077   \gdef^^c9{\'E}
   9078   \gdef^^ca{\ogonek{E}}
   9079   \gdef^^cb{\"E}
   9080   \gdef^^cc{\v E}
   9081   \gdef^^cd{\'I}
   9082   \gdef^^ce{\^I}
   9083   \gdef^^cf{\v D}
   9084   %
   9085   \gdef^^d0{\DH}
   9086   \gdef^^d1{\'N}
   9087   \gdef^^d2{\v N}
   9088   \gdef^^d3{\'O}
   9089   \gdef^^d4{\^O}
   9090   \gdef^^d5{\H O}
   9091   \gdef^^d6{\"O}
   9092   \gdef^^d7{$\times$}
   9093   \gdef^^d8{\v R}
   9094   \gdef^^d9{\ringaccent U}
   9095   \gdef^^da{\'U}
   9096   \gdef^^db{\H U}
   9097   \gdef^^dc{\"U}
   9098   \gdef^^dd{\'Y}
   9099   \gdef^^de{\cedilla T}
   9100   \gdef^^df{\ss}
   9101   %
   9102   \gdef^^e0{\'r}
   9103   \gdef^^e1{\'a}
   9104   \gdef^^e2{\^a}
   9105   \gdef^^e3{\u a}
   9106   \gdef^^e4{\"a}
   9107   \gdef^^e5{\'l}
   9108   \gdef^^e6{\'c}
   9109   \gdef^^e7{\cedilla c}
   9110   \gdef^^e8{\v c}
   9111   \gdef^^e9{\'e}
   9112   \gdef^^ea{\ogonek{e}}
   9113   \gdef^^eb{\"e}
   9114   \gdef^^ec{\v e}
   9115   \gdef^^ed{\'{\dotless{i}}}
   9116   \gdef^^ee{\^{\dotless{i}}}
   9117   \gdef^^ef{\v d}
   9118   %
   9119   \gdef^^f0{\dh}
   9120   \gdef^^f1{\'n}
   9121   \gdef^^f2{\v n}
   9122   \gdef^^f3{\'o}
   9123   \gdef^^f4{\^o}
   9124   \gdef^^f5{\H o}
   9125   \gdef^^f6{\"o}
   9126   \gdef^^f7{$\div$}
   9127   \gdef^^f8{\v r}
   9128   \gdef^^f9{\ringaccent u}
   9129   \gdef^^fa{\'u}
   9130   \gdef^^fb{\H u}
   9131   \gdef^^fc{\"u}
   9132   \gdef^^fd{\'y}
   9133   \gdef^^fe{\cedilla t}
   9134   \gdef^^ff{\dotaccent{}}
   9135 }
   9136 
   9137 % UTF-8 character definitions.
   9138 %
   9139 % This code to support UTF-8 is based on LaTeX's utf8.def, with some
   9140 % changes for Texinfo conventions.  It is included here under the GPL by
   9141 % permission from Frank Mittelbach and the LaTeX team.
   9142 %
   9143 \newcount\countUTFx
   9144 \newcount\countUTFy
   9145 \newcount\countUTFz
   9146 
   9147 \gdef\UTFviiiTwoOctets#1#2{\expandafter
   9148    \UTFviiiDefined\csname u8:#1\string #2\endcsname}
   9149 %
   9150 \gdef\UTFviiiThreeOctets#1#2#3{\expandafter
   9151    \UTFviiiDefined\csname u8:#1\string #2\string #3\endcsname}
   9152 %
   9153 \gdef\UTFviiiFourOctets#1#2#3#4{\expandafter
   9154    \UTFviiiDefined\csname u8:#1\string #2\string #3\string #4\endcsname}
   9155 
   9156 \gdef\UTFviiiDefined#1{%
   9157   \ifx #1\relax
   9158     \message{\linenumber Unicode char \string #1 not defined for Texinfo}%
   9159   \else
   9160     \expandafter #1%
   9161   \fi
   9162 }
   9163 
   9164 \begingroup
   9165   \catcode`\~13
   9166   \catcode`\"12
   9167 
   9168   \def\UTFviiiLoop{%
   9169     \global\catcode\countUTFx\active
   9170     \uccode`\~\countUTFx
   9171     \uppercase\expandafter{\UTFviiiTmp}%
   9172     \advance\countUTFx by 1
   9173     \ifnum\countUTFx < \countUTFy
   9174       \expandafter\UTFviiiLoop
   9175     \fi}
   9176 
   9177   \countUTFx = "C2
   9178   \countUTFy = "E0
   9179   \def\UTFviiiTmp{%
   9180     \xdef~{\noexpand\UTFviiiTwoOctets\string~}}
   9181   \UTFviiiLoop
   9182 
   9183   \countUTFx = "E0
   9184   \countUTFy = "F0
   9185   \def\UTFviiiTmp{%
   9186     \xdef~{\noexpand\UTFviiiThreeOctets\string~}}
   9187   \UTFviiiLoop
   9188 
   9189   \countUTFx = "F0
   9190   \countUTFy = "F4
   9191   \def\UTFviiiTmp{%
   9192     \xdef~{\noexpand\UTFviiiFourOctets\string~}}
   9193   \UTFviiiLoop
   9194 \endgroup
   9195 
   9196 \begingroup
   9197   \catcode`\"=12
   9198   \catcode`\<=12
   9199   \catcode`\.=12
   9200   \catcode`\,=12
   9201   \catcode`\;=12
   9202   \catcode`\!=12
   9203   \catcode`\~=13
   9204 
   9205   \gdef\DeclareUnicodeCharacter#1#2{%
   9206     \countUTFz = "#1\relax
   9207     %\wlog{\space\space defining Unicode char U+#1 (decimal \the\countUTFz)}%
   9208     \begingroup
   9209       \parseXMLCharref
   9210       \def\UTFviiiTwoOctets##1##2{%
   9211         \csname u8:##1\string ##2\endcsname}%
   9212       \def\UTFviiiThreeOctets##1##2##3{%
   9213         \csname u8:##1\string ##2\string ##3\endcsname}%
   9214       \def\UTFviiiFourOctets##1##2##3##4{%
   9215         \csname u8:##1\string ##2\string ##3\string ##4\endcsname}%
   9216       \expandafter\expandafter\expandafter\expandafter
   9217        \expandafter\expandafter\expandafter
   9218        \gdef\UTFviiiTmp{#2}%
   9219     \endgroup}
   9220 
   9221   \gdef\parseXMLCharref{%
   9222     \ifnum\countUTFz < "A0\relax
   9223       \errhelp = \EMsimple
   9224       \errmessage{Cannot define Unicode char value < 00A0}%
   9225     \else\ifnum\countUTFz < "800\relax
   9226       \parseUTFviiiA,%
   9227       \parseUTFviiiB C\UTFviiiTwoOctets.,%
   9228     \else\ifnum\countUTFz < "10000\relax
   9229       \parseUTFviiiA;%
   9230       \parseUTFviiiA,%
   9231       \parseUTFviiiB E\UTFviiiThreeOctets.{,;}%
   9232     \else
   9233       \parseUTFviiiA;%
   9234       \parseUTFviiiA,%
   9235       \parseUTFviiiA!%
   9236       \parseUTFviiiB F\UTFviiiFourOctets.{!,;}%
   9237     \fi\fi\fi
   9238   }
   9239 
   9240   \gdef\parseUTFviiiA#1{%
   9241     \countUTFx = \countUTFz
   9242     \divide\countUTFz by 64
   9243     \countUTFy = \countUTFz
   9244     \multiply\countUTFz by 64
   9245     \advance\countUTFx by -\countUTFz
   9246     \advance\countUTFx by 128
   9247     \uccode `#1\countUTFx
   9248     \countUTFz = \countUTFy}
   9249 
   9250   \gdef\parseUTFviiiB#1#2#3#4{%
   9251     \advance\countUTFz by "#10\relax
   9252     \uccode `#3\countUTFz
   9253     \uppercase{\gdef\UTFviiiTmp{#2#3#4}}}
   9254 \endgroup
   9255 
   9256 \def\utfeightchardefs{%
   9257   \DeclareUnicodeCharacter{00A0}{\tie}
   9258   \DeclareUnicodeCharacter{00A1}{\exclamdown}
   9259   \DeclareUnicodeCharacter{00A3}{\pounds}
   9260   \DeclareUnicodeCharacter{00A8}{\"{ }}
   9261   \DeclareUnicodeCharacter{00A9}{\copyright}
   9262   \DeclareUnicodeCharacter{00AA}{\ordf}
   9263   \DeclareUnicodeCharacter{00AB}{\guillemetleft}
   9264   \DeclareUnicodeCharacter{00AD}{\-}
   9265   \DeclareUnicodeCharacter{00AE}{\registeredsymbol}
   9266   \DeclareUnicodeCharacter{00AF}{\={ }}
   9267 
   9268   \DeclareUnicodeCharacter{00B0}{\ringaccent{ }}
   9269   \DeclareUnicodeCharacter{00B4}{\'{ }}
   9270   \DeclareUnicodeCharacter{00B8}{\cedilla{ }}
   9271   \DeclareUnicodeCharacter{00BA}{\ordm}
   9272   \DeclareUnicodeCharacter{00BB}{\guillemetright}
   9273   \DeclareUnicodeCharacter{00BF}{\questiondown}
   9274 
   9275   \DeclareUnicodeCharacter{00C0}{\`A}
   9276   \DeclareUnicodeCharacter{00C1}{\'A}
   9277   \DeclareUnicodeCharacter{00C2}{\^A}
   9278   \DeclareUnicodeCharacter{00C3}{\~A}
   9279   \DeclareUnicodeCharacter{00C4}{\"A}
   9280   \DeclareUnicodeCharacter{00C5}{\AA}
   9281   \DeclareUnicodeCharacter{00C6}{\AE}
   9282   \DeclareUnicodeCharacter{00C7}{\cedilla{C}}
   9283   \DeclareUnicodeCharacter{00C8}{\`E}
   9284   \DeclareUnicodeCharacter{00C9}{\'E}
   9285   \DeclareUnicodeCharacter{00CA}{\^E}
   9286   \DeclareUnicodeCharacter{00CB}{\"E}
   9287   \DeclareUnicodeCharacter{00CC}{\`I}
   9288   \DeclareUnicodeCharacter{00CD}{\'I}
   9289   \DeclareUnicodeCharacter{00CE}{\^I}
   9290   \DeclareUnicodeCharacter{00CF}{\"I}
   9291 
   9292   \DeclareUnicodeCharacter{00D0}{\DH}
   9293   \DeclareUnicodeCharacter{00D1}{\~N}
   9294   \DeclareUnicodeCharacter{00D2}{\`O}
   9295   \DeclareUnicodeCharacter{00D3}{\'O}
   9296   \DeclareUnicodeCharacter{00D4}{\^O}
   9297   \DeclareUnicodeCharacter{00D5}{\~O}
   9298   \DeclareUnicodeCharacter{00D6}{\"O}
   9299   \DeclareUnicodeCharacter{00D8}{\O}
   9300   \DeclareUnicodeCharacter{00D9}{\`U}
   9301   \DeclareUnicodeCharacter{00DA}{\'U}
   9302   \DeclareUnicodeCharacter{00DB}{\^U}
   9303   \DeclareUnicodeCharacter{00DC}{\"U}
   9304   \DeclareUnicodeCharacter{00DD}{\'Y}
   9305   \DeclareUnicodeCharacter{00DE}{\TH}
   9306   \DeclareUnicodeCharacter{00DF}{\ss}
   9307 
   9308   \DeclareUnicodeCharacter{00E0}{\`a}
   9309   \DeclareUnicodeCharacter{00E1}{\'a}
   9310   \DeclareUnicodeCharacter{00E2}{\^a}
   9311   \DeclareUnicodeCharacter{00E3}{\~a}
   9312   \DeclareUnicodeCharacter{00E4}{\"a}
   9313   \DeclareUnicodeCharacter{00E5}{\aa}
   9314   \DeclareUnicodeCharacter{00E6}{\ae}
   9315   \DeclareUnicodeCharacter{00E7}{\cedilla{c}}
   9316   \DeclareUnicodeCharacter{00E8}{\`e}
   9317   \DeclareUnicodeCharacter{00E9}{\'e}
   9318   \DeclareUnicodeCharacter{00EA}{\^e}
   9319   \DeclareUnicodeCharacter{00EB}{\"e}
   9320   \DeclareUnicodeCharacter{00EC}{\`{\dotless{i}}}
   9321   \DeclareUnicodeCharacter{00ED}{\'{\dotless{i}}}
   9322   \DeclareUnicodeCharacter{00EE}{\^{\dotless{i}}}
   9323   \DeclareUnicodeCharacter{00EF}{\"{\dotless{i}}}
   9324 
   9325   \DeclareUnicodeCharacter{00F0}{\dh}
   9326   \DeclareUnicodeCharacter{00F1}{\~n}
   9327   \DeclareUnicodeCharacter{00F2}{\`o}
   9328   \DeclareUnicodeCharacter{00F3}{\'o}
   9329   \DeclareUnicodeCharacter{00F4}{\^o}
   9330   \DeclareUnicodeCharacter{00F5}{\~o}
   9331   \DeclareUnicodeCharacter{00F6}{\"o}
   9332   \DeclareUnicodeCharacter{00F8}{\o}
   9333   \DeclareUnicodeCharacter{00F9}{\`u}
   9334   \DeclareUnicodeCharacter{00FA}{\'u}
   9335   \DeclareUnicodeCharacter{00FB}{\^u}
   9336   \DeclareUnicodeCharacter{00FC}{\"u}
   9337   \DeclareUnicodeCharacter{00FD}{\'y}
   9338   \DeclareUnicodeCharacter{00FE}{\th}
   9339   \DeclareUnicodeCharacter{00FF}{\"y}
   9340 
   9341   \DeclareUnicodeCharacter{0100}{\=A}
   9342   \DeclareUnicodeCharacter{0101}{\=a}
   9343   \DeclareUnicodeCharacter{0102}{\u{A}}
   9344   \DeclareUnicodeCharacter{0103}{\u{a}}
   9345   \DeclareUnicodeCharacter{0104}{\ogonek{A}}
   9346   \DeclareUnicodeCharacter{0105}{\ogonek{a}}
   9347   \DeclareUnicodeCharacter{0106}{\'C}
   9348   \DeclareUnicodeCharacter{0107}{\'c}
   9349   \DeclareUnicodeCharacter{0108}{\^C}
   9350   \DeclareUnicodeCharacter{0109}{\^c}
   9351   \DeclareUnicodeCharacter{0118}{\ogonek{E}}
   9352   \DeclareUnicodeCharacter{0119}{\ogonek{e}}
   9353   \DeclareUnicodeCharacter{010A}{\dotaccent{C}}
   9354   \DeclareUnicodeCharacter{010B}{\dotaccent{c}}
   9355   \DeclareUnicodeCharacter{010C}{\v{C}}
   9356   \DeclareUnicodeCharacter{010D}{\v{c}}
   9357   \DeclareUnicodeCharacter{010E}{\v{D}}
   9358 
   9359   \DeclareUnicodeCharacter{0112}{\=E}
   9360   \DeclareUnicodeCharacter{0113}{\=e}
   9361   \DeclareUnicodeCharacter{0114}{\u{E}}
   9362   \DeclareUnicodeCharacter{0115}{\u{e}}
   9363   \DeclareUnicodeCharacter{0116}{\dotaccent{E}}
   9364   \DeclareUnicodeCharacter{0117}{\dotaccent{e}}
   9365   \DeclareUnicodeCharacter{011A}{\v{E}}
   9366   \DeclareUnicodeCharacter{011B}{\v{e}}
   9367   \DeclareUnicodeCharacter{011C}{\^G}
   9368   \DeclareUnicodeCharacter{011D}{\^g}
   9369   \DeclareUnicodeCharacter{011E}{\u{G}}
   9370   \DeclareUnicodeCharacter{011F}{\u{g}}
   9371 
   9372   \DeclareUnicodeCharacter{0120}{\dotaccent{G}}
   9373   \DeclareUnicodeCharacter{0121}{\dotaccent{g}}
   9374   \DeclareUnicodeCharacter{0124}{\^H}
   9375   \DeclareUnicodeCharacter{0125}{\^h}
   9376   \DeclareUnicodeCharacter{0128}{\~I}
   9377   \DeclareUnicodeCharacter{0129}{\~{\dotless{i}}}
   9378   \DeclareUnicodeCharacter{012A}{\=I}
   9379   \DeclareUnicodeCharacter{012B}{\={\dotless{i}}}
   9380   \DeclareUnicodeCharacter{012C}{\u{I}}
   9381   \DeclareUnicodeCharacter{012D}{\u{\dotless{i}}}
   9382 
   9383   \DeclareUnicodeCharacter{0130}{\dotaccent{I}}
   9384   \DeclareUnicodeCharacter{0131}{\dotless{i}}
   9385   \DeclareUnicodeCharacter{0132}{IJ}
   9386   \DeclareUnicodeCharacter{0133}{ij}
   9387   \DeclareUnicodeCharacter{0134}{\^J}
   9388   \DeclareUnicodeCharacter{0135}{\^{\dotless{j}}}
   9389   \DeclareUnicodeCharacter{0139}{\'L}
   9390   \DeclareUnicodeCharacter{013A}{\'l}
   9391 
   9392   \DeclareUnicodeCharacter{0141}{\L}
   9393   \DeclareUnicodeCharacter{0142}{\l}
   9394   \DeclareUnicodeCharacter{0143}{\'N}
   9395   \DeclareUnicodeCharacter{0144}{\'n}
   9396   \DeclareUnicodeCharacter{0147}{\v{N}}
   9397   \DeclareUnicodeCharacter{0148}{\v{n}}
   9398   \DeclareUnicodeCharacter{014C}{\=O}
   9399   \DeclareUnicodeCharacter{014D}{\=o}
   9400   \DeclareUnicodeCharacter{014E}{\u{O}}
   9401   \DeclareUnicodeCharacter{014F}{\u{o}}
   9402 
   9403   \DeclareUnicodeCharacter{0150}{\H{O}}
   9404   \DeclareUnicodeCharacter{0151}{\H{o}}
   9405   \DeclareUnicodeCharacter{0152}{\OE}
   9406   \DeclareUnicodeCharacter{0153}{\oe}
   9407   \DeclareUnicodeCharacter{0154}{\'R}
   9408   \DeclareUnicodeCharacter{0155}{\'r}
   9409   \DeclareUnicodeCharacter{0158}{\v{R}}
   9410   \DeclareUnicodeCharacter{0159}{\v{r}}
   9411   \DeclareUnicodeCharacter{015A}{\'S}
   9412   \DeclareUnicodeCharacter{015B}{\'s}
   9413   \DeclareUnicodeCharacter{015C}{\^S}
   9414   \DeclareUnicodeCharacter{015D}{\^s}
   9415   \DeclareUnicodeCharacter{015E}{\cedilla{S}}
   9416   \DeclareUnicodeCharacter{015F}{\cedilla{s}}
   9417 
   9418   \DeclareUnicodeCharacter{0160}{\v{S}}
   9419   \DeclareUnicodeCharacter{0161}{\v{s}}
   9420   \DeclareUnicodeCharacter{0162}{\cedilla{t}}
   9421   \DeclareUnicodeCharacter{0163}{\cedilla{T}}
   9422   \DeclareUnicodeCharacter{0164}{\v{T}}
   9423 
   9424   \DeclareUnicodeCharacter{0168}{\~U}
   9425   \DeclareUnicodeCharacter{0169}{\~u}
   9426   \DeclareUnicodeCharacter{016A}{\=U}
   9427   \DeclareUnicodeCharacter{016B}{\=u}
   9428   \DeclareUnicodeCharacter{016C}{\u{U}}
   9429   \DeclareUnicodeCharacter{016D}{\u{u}}
   9430   \DeclareUnicodeCharacter{016E}{\ringaccent{U}}
   9431   \DeclareUnicodeCharacter{016F}{\ringaccent{u}}
   9432 
   9433   \DeclareUnicodeCharacter{0170}{\H{U}}
   9434   \DeclareUnicodeCharacter{0171}{\H{u}}
   9435   \DeclareUnicodeCharacter{0174}{\^W}
   9436   \DeclareUnicodeCharacter{0175}{\^w}
   9437   \DeclareUnicodeCharacter{0176}{\^Y}
   9438   \DeclareUnicodeCharacter{0177}{\^y}
   9439   \DeclareUnicodeCharacter{0178}{\"Y}
   9440   \DeclareUnicodeCharacter{0179}{\'Z}
   9441   \DeclareUnicodeCharacter{017A}{\'z}
   9442   \DeclareUnicodeCharacter{017B}{\dotaccent{Z}}
   9443   \DeclareUnicodeCharacter{017C}{\dotaccent{z}}
   9444   \DeclareUnicodeCharacter{017D}{\v{Z}}
   9445   \DeclareUnicodeCharacter{017E}{\v{z}}
   9446 
   9447   \DeclareUnicodeCharacter{01C4}{D\v{Z}}
   9448   \DeclareUnicodeCharacter{01C5}{D\v{z}}
   9449   \DeclareUnicodeCharacter{01C6}{d\v{z}}
   9450   \DeclareUnicodeCharacter{01C7}{LJ}
   9451   \DeclareUnicodeCharacter{01C8}{Lj}
   9452   \DeclareUnicodeCharacter{01C9}{lj}
   9453   \DeclareUnicodeCharacter{01CA}{NJ}
   9454   \DeclareUnicodeCharacter{01CB}{Nj}
   9455   \DeclareUnicodeCharacter{01CC}{nj}
   9456   \DeclareUnicodeCharacter{01CD}{\v{A}}
   9457   \DeclareUnicodeCharacter{01CE}{\v{a}}
   9458   \DeclareUnicodeCharacter{01CF}{\v{I}}
   9459 
   9460   \DeclareUnicodeCharacter{01D0}{\v{\dotless{i}}}
   9461   \DeclareUnicodeCharacter{01D1}{\v{O}}
   9462   \DeclareUnicodeCharacter{01D2}{\v{o}}
   9463   \DeclareUnicodeCharacter{01D3}{\v{U}}
   9464   \DeclareUnicodeCharacter{01D4}{\v{u}}
   9465 
   9466   \DeclareUnicodeCharacter{01E2}{\={\AE}}
   9467   \DeclareUnicodeCharacter{01E3}{\={\ae}}
   9468   \DeclareUnicodeCharacter{01E6}{\v{G}}
   9469   \DeclareUnicodeCharacter{01E7}{\v{g}}
   9470   \DeclareUnicodeCharacter{01E8}{\v{K}}
   9471   \DeclareUnicodeCharacter{01E9}{\v{k}}
   9472 
   9473   \DeclareUnicodeCharacter{01F0}{\v{\dotless{j}}}
   9474   \DeclareUnicodeCharacter{01F1}{DZ}
   9475   \DeclareUnicodeCharacter{01F2}{Dz}
   9476   \DeclareUnicodeCharacter{01F3}{dz}
   9477   \DeclareUnicodeCharacter{01F4}{\'G}
   9478   \DeclareUnicodeCharacter{01F5}{\'g}
   9479   \DeclareUnicodeCharacter{01F8}{\`N}
   9480   \DeclareUnicodeCharacter{01F9}{\`n}
   9481   \DeclareUnicodeCharacter{01FC}{\'{\AE}}
   9482   \DeclareUnicodeCharacter{01FD}{\'{\ae}}
   9483   \DeclareUnicodeCharacter{01FE}{\'{\O}}
   9484   \DeclareUnicodeCharacter{01FF}{\'{\o}}
   9485 
   9486   \DeclareUnicodeCharacter{021E}{\v{H}}
   9487   \DeclareUnicodeCharacter{021F}{\v{h}}
   9488 
   9489   \DeclareUnicodeCharacter{0226}{\dotaccent{A}}
   9490   \DeclareUnicodeCharacter{0227}{\dotaccent{a}}
   9491   \DeclareUnicodeCharacter{0228}{\cedilla{E}}
   9492   \DeclareUnicodeCharacter{0229}{\cedilla{e}}
   9493   \DeclareUnicodeCharacter{022E}{\dotaccent{O}}
   9494   \DeclareUnicodeCharacter{022F}{\dotaccent{o}}
   9495 
   9496   \DeclareUnicodeCharacter{0232}{\=Y}
   9497   \DeclareUnicodeCharacter{0233}{\=y}
   9498   \DeclareUnicodeCharacter{0237}{\dotless{j}}
   9499 
   9500   \DeclareUnicodeCharacter{02DB}{\ogonek{ }}
   9501 
   9502   \DeclareUnicodeCharacter{1E02}{\dotaccent{B}}
   9503   \DeclareUnicodeCharacter{1E03}{\dotaccent{b}}
   9504   \DeclareUnicodeCharacter{1E04}{\udotaccent{B}}
   9505   \DeclareUnicodeCharacter{1E05}{\udotaccent{b}}
   9506   \DeclareUnicodeCharacter{1E06}{\ubaraccent{B}}
   9507   \DeclareUnicodeCharacter{1E07}{\ubaraccent{b}}
   9508   \DeclareUnicodeCharacter{1E0A}{\dotaccent{D}}
   9509   \DeclareUnicodeCharacter{1E0B}{\dotaccent{d}}
   9510   \DeclareUnicodeCharacter{1E0C}{\udotaccent{D}}
   9511   \DeclareUnicodeCharacter{1E0D}{\udotaccent{d}}
   9512   \DeclareUnicodeCharacter{1E0E}{\ubaraccent{D}}
   9513   \DeclareUnicodeCharacter{1E0F}{\ubaraccent{d}}
   9514 
   9515   \DeclareUnicodeCharacter{1E1E}{\dotaccent{F}}
   9516   \DeclareUnicodeCharacter{1E1F}{\dotaccent{f}}
   9517 
   9518   \DeclareUnicodeCharacter{1E20}{\=G}
   9519   \DeclareUnicodeCharacter{1E21}{\=g}
   9520   \DeclareUnicodeCharacter{1E22}{\dotaccent{H}}
   9521   \DeclareUnicodeCharacter{1E23}{\dotaccent{h}}
   9522   \DeclareUnicodeCharacter{1E24}{\udotaccent{H}}
   9523   \DeclareUnicodeCharacter{1E25}{\udotaccent{h}}
   9524   \DeclareUnicodeCharacter{1E26}{\"H}
   9525   \DeclareUnicodeCharacter{1E27}{\"h}
   9526 
   9527   \DeclareUnicodeCharacter{1E30}{\'K}
   9528   \DeclareUnicodeCharacter{1E31}{\'k}
   9529   \DeclareUnicodeCharacter{1E32}{\udotaccent{K}}
   9530   \DeclareUnicodeCharacter{1E33}{\udotaccent{k}}
   9531   \DeclareUnicodeCharacter{1E34}{\ubaraccent{K}}
   9532   \DeclareUnicodeCharacter{1E35}{\ubaraccent{k}}
   9533   \DeclareUnicodeCharacter{1E36}{\udotaccent{L}}
   9534   \DeclareUnicodeCharacter{1E37}{\udotaccent{l}}
   9535   \DeclareUnicodeCharacter{1E3A}{\ubaraccent{L}}
   9536   \DeclareUnicodeCharacter{1E3B}{\ubaraccent{l}}
   9537   \DeclareUnicodeCharacter{1E3E}{\'M}
   9538   \DeclareUnicodeCharacter{1E3F}{\'m}
   9539 
   9540   \DeclareUnicodeCharacter{1E40}{\dotaccent{M}}
   9541   \DeclareUnicodeCharacter{1E41}{\dotaccent{m}}
   9542   \DeclareUnicodeCharacter{1E42}{\udotaccent{M}}
   9543   \DeclareUnicodeCharacter{1E43}{\udotaccent{m}}
   9544   \DeclareUnicodeCharacter{1E44}{\dotaccent{N}}
   9545   \DeclareUnicodeCharacter{1E45}{\dotaccent{n}}
   9546   \DeclareUnicodeCharacter{1E46}{\udotaccent{N}}
   9547   \DeclareUnicodeCharacter{1E47}{\udotaccent{n}}
   9548   \DeclareUnicodeCharacter{1E48}{\ubaraccent{N}}
   9549   \DeclareUnicodeCharacter{1E49}{\ubaraccent{n}}
   9550 
   9551   \DeclareUnicodeCharacter{1E54}{\'P}
   9552   \DeclareUnicodeCharacter{1E55}{\'p}
   9553   \DeclareUnicodeCharacter{1E56}{\dotaccent{P}}
   9554   \DeclareUnicodeCharacter{1E57}{\dotaccent{p}}
   9555   \DeclareUnicodeCharacter{1E58}{\dotaccent{R}}
   9556   \DeclareUnicodeCharacter{1E59}{\dotaccent{r}}
   9557   \DeclareUnicodeCharacter{1E5A}{\udotaccent{R}}
   9558   \DeclareUnicodeCharacter{1E5B}{\udotaccent{r}}
   9559   \DeclareUnicodeCharacter{1E5E}{\ubaraccent{R}}
   9560   \DeclareUnicodeCharacter{1E5F}{\ubaraccent{r}}
   9561 
   9562   \DeclareUnicodeCharacter{1E60}{\dotaccent{S}}
   9563   \DeclareUnicodeCharacter{1E61}{\dotaccent{s}}
   9564   \DeclareUnicodeCharacter{1E62}{\udotaccent{S}}
   9565   \DeclareUnicodeCharacter{1E63}{\udotaccent{s}}
   9566   \DeclareUnicodeCharacter{1E6A}{\dotaccent{T}}
   9567   \DeclareUnicodeCharacter{1E6B}{\dotaccent{t}}
   9568   \DeclareUnicodeCharacter{1E6C}{\udotaccent{T}}
   9569   \DeclareUnicodeCharacter{1E6D}{\udotaccent{t}}
   9570   \DeclareUnicodeCharacter{1E6E}{\ubaraccent{T}}
   9571   \DeclareUnicodeCharacter{1E6F}{\ubaraccent{t}}
   9572 
   9573   \DeclareUnicodeCharacter{1E7C}{\~V}
   9574   \DeclareUnicodeCharacter{1E7D}{\~v}
   9575   \DeclareUnicodeCharacter{1E7E}{\udotaccent{V}}
   9576   \DeclareUnicodeCharacter{1E7F}{\udotaccent{v}}
   9577 
   9578   \DeclareUnicodeCharacter{1E80}{\`W}
   9579   \DeclareUnicodeCharacter{1E81}{\`w}
   9580   \DeclareUnicodeCharacter{1E82}{\'W}
   9581   \DeclareUnicodeCharacter{1E83}{\'w}
   9582   \DeclareUnicodeCharacter{1E84}{\"W}
   9583   \DeclareUnicodeCharacter{1E85}{\"w}
   9584   \DeclareUnicodeCharacter{1E86}{\dotaccent{W}}
   9585   \DeclareUnicodeCharacter{1E87}{\dotaccent{w}}
   9586   \DeclareUnicodeCharacter{1E88}{\udotaccent{W}}
   9587   \DeclareUnicodeCharacter{1E89}{\udotaccent{w}}
   9588   \DeclareUnicodeCharacter{1E8A}{\dotaccent{X}}
   9589   \DeclareUnicodeCharacter{1E8B}{\dotaccent{x}}
   9590   \DeclareUnicodeCharacter{1E8C}{\"X}
   9591   \DeclareUnicodeCharacter{1E8D}{\"x}
   9592   \DeclareUnicodeCharacter{1E8E}{\dotaccent{Y}}
   9593   \DeclareUnicodeCharacter{1E8F}{\dotaccent{y}}
   9594 
   9595   \DeclareUnicodeCharacter{1E90}{\^Z}
   9596   \DeclareUnicodeCharacter{1E91}{\^z}
   9597   \DeclareUnicodeCharacter{1E92}{\udotaccent{Z}}
   9598   \DeclareUnicodeCharacter{1E93}{\udotaccent{z}}
   9599   \DeclareUnicodeCharacter{1E94}{\ubaraccent{Z}}
   9600   \DeclareUnicodeCharacter{1E95}{\ubaraccent{z}}
   9601   \DeclareUnicodeCharacter{1E96}{\ubaraccent{h}}
   9602   \DeclareUnicodeCharacter{1E97}{\"t}
   9603   \DeclareUnicodeCharacter{1E98}{\ringaccent{w}}
   9604   \DeclareUnicodeCharacter{1E99}{\ringaccent{y}}
   9605 
   9606   \DeclareUnicodeCharacter{1EA0}{\udotaccent{A}}
   9607   \DeclareUnicodeCharacter{1EA1}{\udotaccent{a}}
   9608 
   9609   \DeclareUnicodeCharacter{1EB8}{\udotaccent{E}}
   9610   \DeclareUnicodeCharacter{1EB9}{\udotaccent{e}}
   9611   \DeclareUnicodeCharacter{1EBC}{\~E}
   9612   \DeclareUnicodeCharacter{1EBD}{\~e}
   9613 
   9614   \DeclareUnicodeCharacter{1ECA}{\udotaccent{I}}
   9615   \DeclareUnicodeCharacter{1ECB}{\udotaccent{i}}
   9616   \DeclareUnicodeCharacter{1ECC}{\udotaccent{O}}
   9617   \DeclareUnicodeCharacter{1ECD}{\udotaccent{o}}
   9618 
   9619   \DeclareUnicodeCharacter{1EE4}{\udotaccent{U}}
   9620   \DeclareUnicodeCharacter{1EE5}{\udotaccent{u}}
   9621 
   9622   \DeclareUnicodeCharacter{1EF2}{\`Y}
   9623   \DeclareUnicodeCharacter{1EF3}{\`y}
   9624   \DeclareUnicodeCharacter{1EF4}{\udotaccent{Y}}
   9625 
   9626   \DeclareUnicodeCharacter{1EF8}{\~Y}
   9627   \DeclareUnicodeCharacter{1EF9}{\~y}
   9628 
   9629   \DeclareUnicodeCharacter{2013}{--}
   9630   \DeclareUnicodeCharacter{2014}{---}
   9631   \DeclareUnicodeCharacter{2018}{\quoteleft}
   9632   \DeclareUnicodeCharacter{2019}{\quoteright}
   9633   \DeclareUnicodeCharacter{201A}{\quotesinglbase}
   9634   \DeclareUnicodeCharacter{201C}{\quotedblleft}
   9635   \DeclareUnicodeCharacter{201D}{\quotedblright}
   9636   \DeclareUnicodeCharacter{201E}{\quotedblbase}
   9637   \DeclareUnicodeCharacter{2022}{\bullet}
   9638   \DeclareUnicodeCharacter{2026}{\dots}
   9639   \DeclareUnicodeCharacter{2039}{\guilsinglleft}
   9640   \DeclareUnicodeCharacter{203A}{\guilsinglright}
   9641   \DeclareUnicodeCharacter{20AC}{\euro}
   9642 
   9643   \DeclareUnicodeCharacter{2192}{\expansion}
   9644   \DeclareUnicodeCharacter{21D2}{\result}
   9645 
   9646   \DeclareUnicodeCharacter{2212}{\minus}
   9647   \DeclareUnicodeCharacter{2217}{\point}
   9648   \DeclareUnicodeCharacter{2261}{\equiv}
   9649 }% end of \utfeightchardefs
   9650 
   9651 
   9652 % US-ASCII character definitions.
   9653 \def\asciichardefs{% nothing need be done
   9654    \relax
   9655 }
   9656 
   9657 % Make non-ASCII characters printable again for compatibility with
   9658 % existing Texinfo documents that may use them, even without declaring a
   9659 % document encoding.
   9660 %
   9661 \setnonasciicharscatcode \other
   9662 
   9663 
   9664 \message{formatting,}
   9665 
   9666 \newdimen\defaultparindent \defaultparindent = 15pt
   9667 
   9668 \chapheadingskip = 15pt plus 4pt minus 2pt
   9669 \secheadingskip = 12pt plus 3pt minus 2pt
   9670 \subsecheadingskip = 9pt plus 2pt minus 2pt
   9671 
   9672 % Prevent underfull vbox error messages.
   9673 \vbadness = 10000
   9674 
   9675 % Don't be very finicky about underfull hboxes, either.
   9676 \hbadness = 6666
   9677 
   9678 % Following George Bush, get rid of widows and orphans.
   9679 \widowpenalty=10000
   9680 \clubpenalty=10000
   9681 
   9682 % Use TeX 3.0's \emergencystretch to help line breaking, but if we're
   9683 % using an old version of TeX, don't do anything.  We want the amount of
   9684 % stretch added to depend on the line length, hence the dependence on
   9685 % \hsize.  We call this whenever the paper size is set.
   9686 %
   9687 \def\setemergencystretch{%
   9688   \ifx\emergencystretch\thisisundefined
   9689     % Allow us to assign to \emergencystretch anyway.
   9690     \def\emergencystretch{\dimen0}%
   9691   \else
   9692     \emergencystretch = .15\hsize
   9693   \fi
   9694 }
   9695 
   9696 % Parameters in order: 1) textheight; 2) textwidth;
   9697 % 3) voffset; 4) hoffset; 5) binding offset; 6) topskip;
   9698 % 7) physical page height; 8) physical page width.
   9699 %
   9700 % We also call \setleading{\textleading}, so the caller should define
   9701 % \textleading.  The caller should also set \parskip.
   9702 %
   9703 \def\internalpagesizes#1#2#3#4#5#6#7#8{%
   9704   \voffset = #3\relax
   9705   \topskip = #6\relax
   9706   \splittopskip = \topskip
   9707   %
   9708   \vsize = #1\relax
   9709   \advance\vsize by \topskip
   9710   \outervsize = \vsize
   9711   \advance\outervsize by 2\topandbottommargin
   9712   \pageheight = \vsize
   9713   %
   9714   \hsize = #2\relax
   9715   \outerhsize = \hsize
   9716   \advance\outerhsize by 0.5in
   9717   \pagewidth = \hsize
   9718   %
   9719   \normaloffset = #4\relax
   9720   \bindingoffset = #5\relax
   9721   %
   9722   \ifpdf
   9723     \pdfpageheight #7\relax
   9724     \pdfpagewidth #8\relax
   9725     % if we don't reset these, they will remain at "1 true in" of
   9726     % whatever layout pdftex was dumped with.
   9727     \pdfhorigin = 1 true in
   9728     \pdfvorigin = 1 true in
   9729   \fi
   9730   %
   9731   \setleading{\textleading}
   9732   %
   9733   \parindent = \defaultparindent
   9734   \setemergencystretch
   9735 }
   9736 
   9737 % @letterpaper (the default).
   9738 \def\letterpaper{{\globaldefs = 1
   9739   \parskip = 3pt plus 2pt minus 1pt
   9740   \textleading = 13.2pt
   9741   %
   9742   % If page is nothing but text, make it come out even.
   9743   \internalpagesizes{607.2pt}{6in}% that's 46 lines
   9744                     {\voffset}{.25in}%
   9745                     {\bindingoffset}{36pt}%
   9746                     {11in}{8.5in}%
   9747 }}
   9748 
   9749 % Use @smallbook to reset parameters for 7x9.25 trim size.
   9750 \def\smallbook{{\globaldefs = 1
   9751   \parskip = 2pt plus 1pt
   9752   \textleading = 12pt
   9753   %
   9754   \internalpagesizes{7.5in}{5in}%
   9755                     {-.2in}{0in}%
   9756                     {\bindingoffset}{16pt}%
   9757                     {9.25in}{7in}%
   9758   %
   9759   \lispnarrowing = 0.3in
   9760   \tolerance = 700
   9761   \hfuzz = 1pt
   9762   \contentsrightmargin = 0pt
   9763   \defbodyindent = .5cm
   9764 }}
   9765 
   9766 % Use @smallerbook to reset parameters for 6x9 trim size.
   9767 % (Just testing, parameters still in flux.)
   9768 \def\smallerbook{{\globaldefs = 1
   9769   \parskip = 1.5pt plus 1pt
   9770   \textleading = 12pt
   9771   %
   9772   \internalpagesizes{7.4in}{4.8in}%
   9773                     {-.2in}{-.4in}%
   9774                     {0pt}{14pt}%
   9775                     {9in}{6in}%
   9776   %
   9777   \lispnarrowing = 0.25in
   9778   \tolerance = 700
   9779   \hfuzz = 1pt
   9780   \contentsrightmargin = 0pt
   9781   \defbodyindent = .4cm
   9782 }}
   9783 
   9784 % Use @afourpaper to print on European A4 paper.
   9785 \def\afourpaper{{\globaldefs = 1
   9786   \parskip = 3pt plus 2pt minus 1pt
   9787   \textleading = 13.2pt
   9788   %
   9789   % Double-side printing via postscript on Laserjet 4050
   9790   % prints double-sided nicely when \bindingoffset=10mm and \hoffset=-6mm.
   9791   % To change the settings for a different printer or situation, adjust
   9792   % \normaloffset until the front-side and back-side texts align.  Then
   9793   % do the same for \bindingoffset.  You can set these for testing in
   9794   % your texinfo source file like this:
   9795   % @tex
   9796   % \global\normaloffset = -6mm
   9797   % \global\bindingoffset = 10mm
   9798   % @end tex
   9799   \internalpagesizes{673.2pt}{160mm}% that's 51 lines
   9800                     {\voffset}{\hoffset}%
   9801                     {\bindingoffset}{44pt}%
   9802                     {297mm}{210mm}%
   9803   %
   9804   \tolerance = 700
   9805   \hfuzz = 1pt
   9806   \contentsrightmargin = 0pt
   9807   \defbodyindent = 5mm
   9808 }}
   9809 
   9810 % Use @afivepaper to print on European A5 paper.
   9811 % From romildo (a] urano.iceb.ufop.br, 2 July 2000.
   9812 % He also recommends making @example and @lisp be small.
   9813 \def\afivepaper{{\globaldefs = 1
   9814   \parskip = 2pt plus 1pt minus 0.1pt
   9815   \textleading = 12.5pt
   9816   %
   9817   \internalpagesizes{160mm}{120mm}%
   9818                     {\voffset}{\hoffset}%
   9819                     {\bindingoffset}{8pt}%
   9820                     {210mm}{148mm}%
   9821   %
   9822   \lispnarrowing = 0.2in
   9823   \tolerance = 800
   9824   \hfuzz = 1.2pt
   9825   \contentsrightmargin = 0pt
   9826   \defbodyindent = 2mm
   9827   \tableindent = 12mm
   9828 }}
   9829 
   9830 % A specific text layout, 24x15cm overall, intended for A4 paper.
   9831 \def\afourlatex{{\globaldefs = 1
   9832   \afourpaper
   9833   \internalpagesizes{237mm}{150mm}%
   9834                     {\voffset}{4.6mm}%
   9835                     {\bindingoffset}{7mm}%
   9836                     {297mm}{210mm}%
   9837   %
   9838   % Must explicitly reset to 0 because we call \afourpaper.
   9839   \globaldefs = 0
   9840 }}
   9841 
   9842 % Use @afourwide to print on A4 paper in landscape format.
   9843 \def\afourwide{{\globaldefs = 1
   9844   \afourpaper
   9845   \internalpagesizes{241mm}{165mm}%
   9846                     {\voffset}{-2.95mm}%
   9847                     {\bindingoffset}{7mm}%
   9848                     {297mm}{210mm}%
   9849   \globaldefs = 0
   9850 }}
   9851 
   9852 % @pagesizes TEXTHEIGHT[,TEXTWIDTH]
   9853 % Perhaps we should allow setting the margins, \topskip, \parskip,
   9854 % and/or leading, also. Or perhaps we should compute them somehow.
   9855 %
   9856 \parseargdef\pagesizes{\pagesizesyyy #1,,\finish}
   9857 \def\pagesizesyyy#1,#2,#3\finish{{%
   9858   \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \hsize=#2\relax \fi
   9859   \globaldefs = 1
   9860   %
   9861   \parskip = 3pt plus 2pt minus 1pt
   9862   \setleading{\textleading}%
   9863   %
   9864   \dimen0 = #1\relax
   9865   \advance\dimen0 by \voffset
   9866   %
   9867   \dimen2 = \hsize
   9868   \advance\dimen2 by \normaloffset
   9869   %
   9870   \internalpagesizes{#1}{\hsize}%
   9871                     {\voffset}{\normaloffset}%
   9872                     {\bindingoffset}{44pt}%
   9873                     {\dimen0}{\dimen2}%
   9874 }}
   9875 
   9876 % Set default to letter.
   9877 %
   9878 \letterpaper
   9879 
   9880 
   9881 \message{and turning on texinfo input format.}
   9882 
   9883 \def^^L{\par} % remove \outer, so ^L can appear in an @comment
   9884 
   9885 % DEL is a comment character, in case @c does not suffice.
   9886 \catcode`\^^? = 14
   9887 
   9888 % Define macros to output various characters with catcode for normal text.
   9889 \catcode`\"=\other \def\normaldoublequote{"}
   9890 \catcode`\$=\other \def\normaldollar{$}%$ font-lock fix
   9891 \catcode`\+=\other \def\normalplus{+}
   9892 \catcode`\<=\other \def\normalless{<}
   9893 \catcode`\>=\other \def\normalgreater{>}
   9894 \catcode`\^=\other \def\normalcaret{^}
   9895 \catcode`\_=\other \def\normalunderscore{_}
   9896 \catcode`\|=\other \def\normalverticalbar{|}
   9897 \catcode`\~=\other \def\normaltilde{~}
   9898 
   9899 % This macro is used to make a character print one way in \tt
   9900 % (where it can probably be output as-is), and another way in other fonts,
   9901 % where something hairier probably needs to be done.
   9902 %
   9903 % #1 is what to print if we are indeed using \tt; #2 is what to print
   9904 % otherwise.  Since all the Computer Modern typewriter fonts have zero
   9905 % interword stretch (and shrink), and it is reasonable to expect all
   9906 % typewriter fonts to have this, we can check that font parameter.
   9907 %
   9908 \def\ifusingtt#1#2{\ifdim \fontdimen3\font=0pt #1\else #2\fi}
   9909 
   9910 % Same as above, but check for italic font.  Actually this also catches
   9911 % non-italic slanted fonts since it is impossible to distinguish them from
   9912 % italic fonts.  But since this is only used by $ and it uses \sl anyway
   9913 % this is not a problem.
   9914 \def\ifusingit#1#2{\ifdim \fontdimen1\font>0pt #1\else #2\fi}
   9915 
   9916 % Turn off all special characters except @
   9917 % (and those which the user can use as if they were ordinary).
   9918 % Most of these we simply print from the \tt font, but for some, we can
   9919 % use math or other variants that look better in normal text.
   9920 
   9921 \catcode`\"=\active
   9922 \def\activedoublequote{{\tt\char34}}
   9923 \let"=\activedoublequote
   9924 \catcode`\~=\active
   9925 \def~{{\tt\char126}}
   9926 \chardef\hat=`\^
   9927 \catcode`\^=\active
   9928 \def^{{\tt \hat}}
   9929 
   9930 \catcode`\_=\active
   9931 \def_{\ifusingtt\normalunderscore\_}
   9932 \let\realunder=_
   9933 % Subroutine for the previous macro.
   9934 \def\_{\leavevmode \kern.07em \vbox{\hrule width.3em height.1ex}\kern .07em }
   9935 
   9936 \catcode`\|=\active
   9937 \def|{{\tt\char124}}
   9938 \chardef \less=`\<
   9939 \catcode`\<=\active
   9940 \def<{{\tt \less}}
   9941 \chardef \gtr=`\>
   9942 \catcode`\>=\active
   9943 \def>{{\tt \gtr}}
   9944 \catcode`\+=\active
   9945 \def+{{\tt \char 43}}
   9946 \catcode`\$=\active
   9947 \def${\ifusingit{{\sl\$}}\normaldollar}%$ font-lock fix
   9948 
   9949 % If a .fmt file is being used, characters that might appear in a file
   9950 % name cannot be active until we have parsed the command line.
   9951 % So turn them off again, and have \everyjob (or @setfilename) turn them on.
   9952 % \otherifyactive is called near the end of this file.
   9953 \def\otherifyactive{\catcode`+=\other \catcode`\_=\other}
   9954 
   9955 % Used sometimes to turn off (effectively) the active characters even after
   9956 % parsing them.
   9957 \def\turnoffactive{%
   9958   \normalturnoffactive
   9959   \otherbackslash
   9960 }
   9961 
   9962 \catcode`\@=0
   9963 
   9964 % \backslashcurfont outputs one backslash character in current font,
   9965 % as in \char`\\.
   9966 \global\chardef\backslashcurfont=`\\
   9967 \global\let\rawbackslashxx=\backslashcurfont  % let existing .??s files work
   9968 
   9969 % \realbackslash is an actual character `\' with catcode other, and
   9970 % \doublebackslash is two of them (for the pdf outlines).
   9971 {\catcode`\\=\other @gdef@realbackslash{\} @gdef@doublebackslash{\\}}
   9972 
   9973 % In texinfo, backslash is an active character; it prints the backslash
   9974 % in fixed width font.
   9975 \catcode`\\=\active  % @ for escape char from now on.
   9976 
   9977 % The story here is that in math mode, the \char of \backslashcurfont
   9978 % ends up printing the roman \ from the math symbol font (because \char
   9979 % in math mode uses the \mathcode, and plain.tex sets
   9980 % \mathcode`\\="026E).  It seems better for @backslashchar{} to always
   9981 % print a typewriter backslash, hence we use an explicit \mathchar,
   9982 % which is the decimal equivalent of "715c (class 7, e.g., use \fam;
   9983 % ignored family value; char position "5C).  We can't use " for the
   9984 % usual hex value because it has already been made active.
   9985 @def@normalbackslash{{@tt @ifmmode @mathchar29020 @else @backslashcurfont @fi}}
   9986 @let@backslashchar = @normalbackslash % @backslashchar{} is for user documents.
   9987 
   9988 % On startup, @fixbackslash assigns:
   9989 %  @let \ = @normalbackslash
   9990 % \rawbackslash defines an active \ to do \backslashcurfont.
   9991 % \otherbackslash defines an active \ to be a literal `\' character with
   9992 % catcode other.  We switch back and forth between these.
   9993 @gdef@rawbackslash{@let\=@backslashcurfont}
   9994 @gdef@otherbackslash{@let\=@realbackslash}
   9995 
   9996 % Same as @turnoffactive except outputs \ as {\tt\char`\\} instead of
   9997 % the literal character `\'.  Also revert - to its normal character, in
   9998 % case the active - from code has slipped in.
   9999 %
   10000 {@catcode`- = @active
   10001  @gdef@normalturnoffactive{%
   10002    @let-=@normaldash
   10003    @let"=@normaldoublequote
   10004    @let$=@normaldollar %$ font-lock fix
   10005    @let+=@normalplus
   10006    @let<=@normalless
   10007    @let>=@normalgreater
   10008    @let\=@normalbackslash
   10009    @let^=@normalcaret
   10010    @let_=@normalunderscore
   10011    @let|=@normalverticalbar
   10012    @let~=@normaltilde
   10013    @markupsetuplqdefault
   10014    @markupsetuprqdefault
   10015    @unsepspaces
   10016  }
   10017 }
   10018 
   10019 % Make _ and + \other characters, temporarily.
   10020 % This is canceled by @fixbackslash.
   10021 @otherifyactive
   10022 
   10023 % If a .fmt file is being used, we don't want the `\input texinfo' to show up.
   10024 % That is what \eatinput is for; after that, the `\' should revert to printing
   10025 % a backslash.
   10026 %
   10027 @gdef@eatinput input texinfo{@fixbackslash}
   10028 @global@let\ = @eatinput
   10029 
   10030 % On the other hand, perhaps the file did not have a `\input texinfo'. Then
   10031 % the first `\' in the file would cause an error. This macro tries to fix
   10032 % that, assuming it is called before the first `\' could plausibly occur.
   10033 % Also turn back on active characters that might appear in the input
   10034 % file name, in case not using a pre-dumped format.
   10035 %
   10036 @gdef@fixbackslash{%
   10037   @ifx\@eatinput @let\ = @normalbackslash @fi
   10038   @catcode`+=@active
   10039   @catcode`@_=@active
   10040 }
   10041 
   10042 % Say @foo, not \foo, in error messages.
   10043 @escapechar = `@@
   10044 
   10045 % These (along with & and #) are made active for url-breaking, so need
   10046 % active definitions as the normal characters.
   10047 @def@normaldot{.}
   10048 @def@normalquest{?}
   10049 @def@normalslash{/}
   10050 
   10051 % These look ok in all fonts, so just make them not special.
   10052 % @hashchar{} gets its own user-level command, because of #line.
   10053 @catcode`@& = @other @def@normalamp{&}
   10054 @catcode`@# = @other @def@normalhash{#}
   10055 @catcode`@% = @other @def@normalpercent{%}
   10056 
   10057 @let @hashchar = @normalhash
   10058 
   10059 @c Finally, make ` and ' active, so that txicodequoteundirected and
   10060 @c txicodequotebacktick work right in, e.g., @w{@code{`foo'}}.  If we
   10061 @c don't make ` and ' active, @code will not get them as active chars.
   10062 @c Do this last of all since we use ` in the previous @catcode assignments.
   10063 @catcode`@'=@active
   10064 @catcode`@`=@active
   10065 @markupsetuplqdefault
   10066 @markupsetuprqdefault
   10067 
   10068 @c Local variables:
   10069 @c eval: (add-hook 'write-file-hooks 'time-stamp)
   10070 @c page-delimiter: "^\\\\message"
   10071 @c time-stamp-start: "def\\\\texinfoversion{"
   10072 @c time-stamp-format: "%:y-%02m-%02d.%02H"
   10073 @c time-stamp-end: "}"
   10074 @c End:
   10075 
   10076 @c vim:sw=2:
   10077 
   10078 @ignore
   10079    arch-tag: e1b36e32-c96e-4135-a41a-0b2efa2ea115
   10080 @end ignore
   10081