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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{2009-03-28.05}
      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 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 has been our intent since Texinfo was invented.)
     28 %
     29 % Please try the latest version of texinfo.tex before submitting bug
     30 % reports; you can get the latest version from:
     31 %   http://www.gnu.org/software/texinfo/ (the Texinfo home page), or
     32 %   ftp://tug.org/tex/texinfo.tex
     33 %     (and all CTAN mirrors, see http://www.ctan.org).
     34 % The texinfo.tex in any given distribution could well be out
     35 % of date, so if that's what you're using, please check.
     36 %
     37 % Send bug reports to bug-texinfo (a] gnu.org.  Please include including a
     38 % complete document in each bug report with which we can reproduce the
     39 % problem.  Patches are, of course, greatly appreciated.
     40 %
     41 % To process a Texinfo manual with TeX, it's most reliable to use the
     42 % texi2dvi shell script that comes with the distribution.  For a simple
     43 % manual foo.texi, however, you can get away with this:
     44 %   tex foo.texi
     45 %   texindex foo.??
     46 %   tex foo.texi
     47 %   tex foo.texi
     48 %   dvips foo.dvi -o  # or whatever; this makes foo.ps.
     49 % The extra TeX runs get the cross-reference information correct.
     50 % Sometimes one run after texindex suffices, and sometimes you need more
     51 % than two; texi2dvi does it as many times as necessary.
     52 %
     53 % It is possible to adapt texinfo.tex for other languages, to some
     54 % extent.  You can get the existing language-specific files from the
     55 % full Texinfo distribution.
     56 %
     57 % The GNU Texinfo home page is http://www.gnu.org/software/texinfo.
     58 
     59 
     60 \message{Loading texinfo [version \texinfoversion]:}
     61 
     62 % If in a .fmt file, print the version number
     63 % and turn on active characters that we couldn't do earlier because
     64 % they might have appeared in the input file name.
     65 \everyjob{\message{[Texinfo version \texinfoversion]}%
     66   \catcode`+=\active \catcode`\_=\active}
     67 
     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\ptexrbrace=\}
     97 \let\ptexslash=\/
     98 \let\ptexstar=\*
     99 \let\ptext=\t
    100 \let\ptextop=\top
    101 {\catcode`\'=\active
    102 \global\let\ptexquoteright'}% Math-mode def from plain.tex.
    103 \let\ptexraggedright=\raggedright
    104 
    105 % If this character appears in an error message or help string, it
    106 % starts a new line in the output.
    107 \newlinechar = `^^J
    108 
    109 % Use TeX 3.0's \inputlineno to get the line number, for better error
    110 % messages, but if we're using an old version of TeX, don't do anything.
    111 %
    112 \ifx\inputlineno\thisisundefined
    113   \let\linenumber = \empty % Pre-3.0.
    114 \else
    115   \def\linenumber{l.\the\inputlineno:\space}
    116 \fi
    117 
    118 % Set up fixed words for English if not already set.
    119 \ifx\putwordAppendix\undefined  \gdef\putwordAppendix{Appendix}\fi
    120 \ifx\putwordChapter\undefined   \gdef\putwordChapter{Chapter}\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\colonChar = `\:
    164 \chardef\commaChar = `\,
    165 \chardef\dashChar  = `\-
    166 \chardef\dotChar   = `\.
    167 \chardef\exclamChar= `\!
    168 \chardef\lquoteChar= `\`
    169 \chardef\questChar = `\?
    170 \chardef\rquoteChar= `\'
    171 \chardef\semiChar  = `\;
    172 \chardef\underChar = `\_
    173 
    174 % Ignore a token.
    175 %
    176 \def\gobble#1{}
    177 
    178 % The following is used inside several \edef's.
    179 \def\makecsname#1{\expandafter\noexpand\csname#1\endcsname}
    180 
    181 % Hyphenation fixes.
    182 \hyphenation{
    183   Flor-i-da Ghost-script Ghost-view Mac-OS Post-Script
    184   ap-pen-dix bit-map bit-maps
    185   data-base data-bases eshell fall-ing half-way long-est man-u-script
    186   man-u-scripts mini-buf-fer mini-buf-fers over-view par-a-digm
    187   par-a-digms rath-er rec-tan-gu-lar ro-bot-ics se-vere-ly set-up spa-ces
    188   spell-ing spell-ings
    189   stand-alone strong-est time-stamp time-stamps which-ever white-space
    190   wide-spread wrap-around
    191 }
    192 
    193 % Margin to add to right of even pages, to left of odd pages.
    194 \newdimen\bindingoffset
    195 \newdimen\normaloffset
    196 \newdimen\pagewidth \newdimen\pageheight
    197 
    198 % For a final copy, take out the rectangles
    199 % that mark overfull boxes (in case you have decided
    200 % that the text looks ok even though it passes the margin).
    201 %
    202 \def\finalout{\overfullrule=0pt}
    203 
    204 % @| inserts a changebar to the left of the current line.  It should
    205 % surround any changed text.  This approach does *not* work if the
    206 % change spans more than two lines of output.  To handle that, we would
    207 % have adopt a much more difficult approach (putting marks into the main
    208 % vertical list for the beginning and end of each change).
    209 %
    210 \def\|{%
    211   % \vadjust can only be used in horizontal mode.
    212   \leavevmode
    213   %
    214   % Append this vertical mode material after the current line in the output.
    215   \vadjust{%
    216     % We want to insert a rule with the height and depth of the current
    217     % leading; that is exactly what \strutbox is supposed to record.
    218     \vskip-\baselineskip
    219     %
    220     % \vadjust-items are inserted at the left edge of the type.  So
    221     % the \llap here moves out into the left-hand margin.
    222     \llap{%
    223       %
    224       % For a thicker or thinner bar, change the `1pt'.
    225       \vrule height\baselineskip width1pt
    226       %
    227       % This is the space between the bar and the text.
    228       \hskip 12pt
    229     }%
    230   }%
    231 }
    232 
    233 % Sometimes it is convenient to have everything in the transcript file
    234 % and nothing on the terminal.  We don't just call \tracingall here,
    235 % since that produces some useless output on the terminal.  We also make
    236 % some effort to order the tracing commands to reduce output in the log
    237 % file; cf. trace.sty in LaTeX.
    238 %
    239 \def\gloggingall{\begingroup \globaldefs = 1 \loggingall \endgroup}%
    240 \def\loggingall{%
    241   \tracingstats2
    242   \tracingpages1
    243   \tracinglostchars2  % 2 gives us more in etex
    244   \tracingparagraphs1
    245   \tracingoutput1
    246   \tracingmacros2
    247   \tracingrestores1
    248   \showboxbreadth\maxdimen \showboxdepth\maxdimen
    249   \ifx\eTeXversion\undefined\else % etex gives us more logging
    250     \tracingscantokens1
    251     \tracingifs1
    252     \tracinggroups1
    253     \tracingnesting2
    254     \tracingassigns1
    255   \fi
    256   \tracingcommands3  % 3 gives us more in etex
    257   \errorcontextlines16
    258 }%
    259 
    260 % add check for \lastpenalty to plain's definitions.  If the last thing
    261 % we did was a \nobreak, we don't want to insert more space.
    262 %
    263 \def\smallbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\smallskipamount
    264   \removelastskip\penalty-50\smallskip\fi\fi}
    265 \def\medbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\medskipamount
    266   \removelastskip\penalty-100\medskip\fi\fi}
    267 \def\bigbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\bigskipamount
    268   \removelastskip\penalty-200\bigskip\fi\fi}
    269 
    270 % For @cropmarks command.
    271 % Do @cropmarks to get crop marks.
    272 %
    273 \newif\ifcropmarks
    274 \let\cropmarks = \cropmarkstrue
    275 %
    276 % Dimensions to add cropmarks at corners.
    277 % Added by P. A. MacKay, 12 Nov. 1986
    278 %
    279 \newdimen\outerhsize \newdimen\outervsize % set by the paper size routines
    280 \newdimen\cornerlong  \cornerlong=1pc
    281 \newdimen\cornerthick \cornerthick=.3pt
    282 \newdimen\topandbottommargin \topandbottommargin=.75in
    283 
    284 % Output a mark which sets \thischapter, \thissection and \thiscolor.
    285 % We dump everything together because we only have one kind of mark.
    286 % This works because we only use \botmark / \topmark, not \firstmark.
    287 %
    288 % A mark contains a subexpression of the \ifcase ... \fi construct.
    289 % \get*marks macros below extract the needed part using \ifcase.
    290 %
    291 % Another complication is to let the user choose whether \thischapter
    292 % (\thissection) refers to the chapter (section) in effect at the top
    293 % of a page, or that at the bottom of a page.  The solution is
    294 % described on page 260 of The TeXbook.  It involves outputting two
    295 % marks for the sectioning macros, one before the section break, and
    296 % one after.  I won't pretend I can describe this better than DEK...
    297 \def\domark{%
    298   \toks0=\expandafter{\lastchapterdefs}%
    299   \toks2=\expandafter{\lastsectiondefs}%
    300   \toks4=\expandafter{\prevchapterdefs}%
    301   \toks6=\expandafter{\prevsectiondefs}%
    302   \toks8=\expandafter{\lastcolordefs}%
    303   \mark{%
    304                    \the\toks0 \the\toks2
    305       \noexpand\or \the\toks4 \the\toks6
    306     \noexpand\else \the\toks8
    307   }%
    308 }
    309 % \topmark doesn't work for the very first chapter (after the title
    310 % page or the contents), so we use \firstmark there -- this gets us
    311 % the mark with the chapter defs, unless the user sneaks in, e.g.,
    312 % @setcolor (or @url, or @link, etc.) between @contents and the very
    313 % first @chapter.
    314 \def\gettopheadingmarks{%
    315   \ifcase0\topmark\fi
    316   \ifx\thischapter\empty \ifcase0\firstmark\fi \fi
    317 }
    318 \def\getbottomheadingmarks{\ifcase1\botmark\fi}
    319 \def\getcolormarks{\ifcase2\topmark\fi}
    320 
    321 % Avoid "undefined control sequence" errors.
    322 \def\lastchapterdefs{}
    323 \def\lastsectiondefs{}
    324 \def\prevchapterdefs{}
    325 \def\prevsectiondefs{}
    326 \def\lastcolordefs{}
    327 
    328 % Main output routine.
    329 \chardef\PAGE = 255
    330 \output = {\onepageout{\pagecontents\PAGE}}
    331 
    332 \newbox\headlinebox
    333 \newbox\footlinebox
    334 
    335 % \onepageout takes a vbox as an argument.  Note that \pagecontents
    336 % does insertions, but you have to call it yourself.
    337 \def\onepageout#1{%
    338   \ifcropmarks \hoffset=0pt \else \hoffset=\normaloffset \fi
    339   %
    340   \ifodd\pageno  \advance\hoffset by \bindingoffset
    341   \else \advance\hoffset by -\bindingoffset\fi
    342   %
    343   % Do this outside of the \shipout so @code etc. will be expanded in
    344   % the headline as they should be, not taken literally (outputting ''code).
    345   \ifodd\pageno \getoddheadingmarks \else \getevenheadingmarks \fi
    346   \setbox\headlinebox = \vbox{\let\hsize=\pagewidth \makeheadline}%
    347   \ifodd\pageno \getoddfootingmarks \else \getevenfootingmarks \fi
    348   \setbox\footlinebox = \vbox{\let\hsize=\pagewidth \makefootline}%
    349   %
    350   {%
    351     % Have to do this stuff outside the \shipout because we want it to
    352     % take effect in \write's, yet the group defined by the \vbox ends
    353     % before the \shipout runs.
    354     %
    355     \indexdummies         % don't expand commands in the output.
    356     \normalturnoffactive  % \ in index entries must not stay \, e.g., if
    357                % the page break happens to be in the middle of an example.
    358                % We don't want .vr (or whatever) entries like this:
    359                % \entry{{\tt \indexbackslash }acronym}{32}{\code {\acronym}}
    360                % "\acronym" won't work when it's read back in;
    361                % it needs to be
    362                % {\code {{\tt \backslashcurfont }acronym}
    363     \shipout\vbox{%
    364       % Do this early so pdf references go to the beginning of the page.
    365       \ifpdfmakepagedest \pdfdest name{\the\pageno} xyz\fi
    366       %
    367       \ifcropmarks \vbox to \outervsize\bgroup
    368         \hsize = \outerhsize
    369         \vskip-\topandbottommargin
    370         \vtop to0pt{%
    371           \line{\ewtop\hfil\ewtop}%
    372           \nointerlineskip
    373           \line{%
    374             \vbox{\moveleft\cornerthick\nstop}%
    375             \hfill
    376             \vbox{\moveright\cornerthick\nstop}%
    377           }%
    378           \vss}%
    379         \vskip\topandbottommargin
    380         \line\bgroup
    381           \hfil % center the page within the outer (page) hsize.
    382           \ifodd\pageno\hskip\bindingoffset\fi
    383           \vbox\bgroup
    384       \fi
    385       %
    386       \unvbox\headlinebox
    387       \pagebody{#1}%
    388       \ifdim\ht\footlinebox > 0pt
    389         % Only leave this space if the footline is nonempty.
    390         % (We lessened \vsize for it in \oddfootingyyy.)
    391         % The \baselineskip=24pt in plain's \makefootline has no effect.
    392         \vskip 24pt
    393         \unvbox\footlinebox
    394       \fi
    395       %
    396       \ifcropmarks
    397           \egroup % end of \vbox\bgroup
    398         \hfil\egroup % end of (centering) \line\bgroup
    399         \vskip\topandbottommargin plus1fill minus1fill
    400         \boxmaxdepth = \cornerthick
    401         \vbox to0pt{\vss
    402           \line{%
    403             \vbox{\moveleft\cornerthick\nsbot}%
    404             \hfill
    405             \vbox{\moveright\cornerthick\nsbot}%
    406           }%
    407           \nointerlineskip
    408           \line{\ewbot\hfil\ewbot}%
    409         }%
    410       \egroup % \vbox from first cropmarks clause
    411       \fi
    412     }% end of \shipout\vbox
    413   }% end of group with \indexdummies
    414   \advancepageno
    415   \ifnum\outputpenalty>-20000 \else\dosupereject\fi
    416 }
    417 
    418 \newinsert\margin \dimen\margin=\maxdimen
    419 
    420 \def\pagebody#1{\vbox to\pageheight{\boxmaxdepth=\maxdepth #1}}
    421 {\catcode`\@ =11
    422 \gdef\pagecontents#1{\ifvoid\topins\else\unvbox\topins\fi
    423 % marginal hacks, juha (a] viisa.uucp (Juha Takala)
    424 \ifvoid\margin\else % marginal info is present
    425   \rlap{\kern\hsize\vbox to\z@{\kern1pt\box\margin \vss}}\fi
    426 \dimen@=\dp#1\relax \unvbox#1\relax
    427 \ifvoid\footins\else\vskip\skip\footins\footnoterule \unvbox\footins\fi
    428 \ifr@ggedbottom \kern-\dimen@ \vfil \fi}
    429 }
    430 
    431 % Here are the rules for the cropmarks.  Note that they are
    432 % offset so that the space between them is truly \outerhsize or \outervsize
    433 % (P. A. MacKay, 12 November, 1986)
    434 %
    435 \def\ewtop{\vrule height\cornerthick depth0pt width\cornerlong}
    436 \def\nstop{\vbox
    437   {\hrule height\cornerthick depth\cornerlong width\cornerthick}}
    438 \def\ewbot{\vrule height0pt depth\cornerthick width\cornerlong}
    439 \def\nsbot{\vbox
    440   {\hrule height\cornerlong depth\cornerthick width\cornerthick}}
    441 
    442 % Parse an argument, then pass it to #1.  The argument is the rest of
    443 % the input line (except we remove a trailing comment).  #1 should be a
    444 % macro which expects an ordinary undelimited TeX argument.
    445 %
    446 \def\parsearg{\parseargusing{}}
    447 \def\parseargusing#1#2{%
    448   \def\argtorun{#2}%
    449   \begingroup
    450     \obeylines
    451     \spaceisspace
    452     #1%
    453     \parseargline\empty% Insert the \empty token, see \finishparsearg below.
    454 }
    455 
    456 {\obeylines %
    457   \gdef\parseargline#1^^M{%
    458     \endgroup % End of the group started in \parsearg.
    459     \argremovecomment #1\comment\ArgTerm%
    460   }%
    461 }
    462 
    463 % First remove any @comment, then any @c comment.
    464 \def\argremovecomment#1\comment#2\ArgTerm{\argremovec #1\c\ArgTerm}
    465 \def\argremovec#1\c#2\ArgTerm{\argcheckspaces#1\^^M\ArgTerm}
    466 
    467 % Each occurrence of `\^^M' or `<space>\^^M' is replaced by a single space.
    468 %
    469 % \argremovec might leave us with trailing space, e.g.,
    470 %    @end itemize  @c foo
    471 % This space token undergoes the same procedure and is eventually removed
    472 % by \finishparsearg.
    473 %
    474 \def\argcheckspaces#1\^^M{\argcheckspacesX#1\^^M \^^M}
    475 \def\argcheckspacesX#1 \^^M{\argcheckspacesY#1\^^M}
    476 \def\argcheckspacesY#1\^^M#2\^^M#3\ArgTerm{%
    477   \def\temp{#3}%
    478   \ifx\temp\empty
    479     % Do not use \next, perhaps the caller of \parsearg uses it; reuse \temp:
    480     \let\temp\finishparsearg
    481   \else
    482     \let\temp\argcheckspaces
    483   \fi
    484   % Put the space token in:
    485   \temp#1 #3\ArgTerm
    486 }
    487 
    488 % If a _delimited_ argument is enclosed in braces, they get stripped; so
    489 % to get _exactly_ the rest of the line, we had to prevent such situation.
    490 % We prepended an \empty token at the very beginning and we expand it now,
    491 % just before passing the control to \argtorun.
    492 % (Similarly, we have to think about #3 of \argcheckspacesY above: it is
    493 % either the null string, or it ends with \^^M---thus there is no danger
    494 % that a pair of braces would be stripped.
    495 %
    496 % But first, we have to remove the trailing space token.
    497 %
    498 \def\finishparsearg#1 \ArgTerm{\expandafter\argtorun\expandafter{#1}}
    499 
    500 % \parseargdef\foo{...}
    501 %	is roughly equivalent to
    502 % \def\foo{\parsearg\Xfoo}
    503 % \def\Xfoo#1{...}
    504 %
    505 % Actually, I use \csname\string\foo\endcsname, ie. \\foo, as it is my
    506 % favourite TeX trick.  --kasal, 16nov03
    507 
    508 \def\parseargdef#1{%
    509   \expandafter \doparseargdef \csname\string#1\endcsname #1%
    510 }
    511 \def\doparseargdef#1#2{%
    512   \def#2{\parsearg#1}%
    513   \def#1##1%
    514 }
    515 
    516 % Several utility definitions with active space:
    517 {
    518   \obeyspaces
    519   \gdef\obeyedspace{ }
    520 
    521   % Make each space character in the input produce a normal interword
    522   % space in the output.  Don't allow a line break at this space, as this
    523   % is used only in environments like @example, where each line of input
    524   % should produce a line of output anyway.
    525   %
    526   \gdef\sepspaces{\obeyspaces\let =\tie}
    527 
    528   % If an index command is used in an @example environment, any spaces
    529   % therein should become regular spaces in the raw index file, not the
    530   % expansion of \tie (\leavevmode \penalty \@M \ ).
    531   \gdef\unsepspaces{\let =\space}
    532 }
    533 
    534 
    535 \def\flushcr{\ifx\par\lisppar \def\next##1{}\else \let\next=\relax \fi \next}
    536 
    537 % Define the framework for environments in texinfo.tex.  It's used like this:
    538 %
    539 %   \envdef\foo{...}
    540 %   \def\Efoo{...}
    541 %
    542 % It's the responsibility of \envdef to insert \begingroup before the
    543 % actual body; @end closes the group after calling \Efoo.  \envdef also
    544 % defines \thisenv, so the current environment is known; @end checks
    545 % whether the environment name matches.  The \checkenv macro can also be
    546 % used to check whether the current environment is the one expected.
    547 %
    548 % Non-false conditionals (@iftex, @ifset) don't fit into this, so they
    549 % are not treated as environments; they don't open a group.  (The
    550 % implementation of @end takes care not to call \endgroup in this
    551 % special case.)
    552 
    553 
    554 % At run-time, environments start with this:
    555 \def\startenvironment#1{\begingroup\def\thisenv{#1}}
    556 % initialize
    557 \let\thisenv\empty
    558 
    559 % ... but they get defined via ``\envdef\foo{...}'':
    560 \long\def\envdef#1#2{\def#1{\startenvironment#1#2}}
    561 \def\envparseargdef#1#2{\parseargdef#1{\startenvironment#1#2}}
    562 
    563 % Check whether we're in the right environment:
    564 \def\checkenv#1{%
    565   \def\temp{#1}%
    566   \ifx\thisenv\temp
    567   \else
    568     \badenverr
    569   \fi
    570 }
    571 
    572 % Environment mismatch, #1 expected:
    573 \def\badenverr{%
    574   \errhelp = \EMsimple
    575   \errmessage{This command can appear only \inenvironment\temp,
    576     not \inenvironment\thisenv}%
    577 }
    578 \def\inenvironment#1{%
    579   \ifx#1\empty
    580     out of any environment%
    581   \else
    582     in environment \expandafter\string#1%
    583   \fi
    584 }
    585 
    586 % @end foo executes the definition of \Efoo.
    587 % But first, it executes a specialized version of \checkenv
    588 %
    589 \parseargdef\end{%
    590   \if 1\csname iscond.#1\endcsname
    591   \else
    592     % The general wording of \badenverr may not be ideal, but... --kasal, 06nov03
    593     \expandafter\checkenv\csname#1\endcsname
    594     \csname E#1\endcsname
    595     \endgroup
    596   \fi
    597 }
    598 
    599 \newhelp\EMsimple{Press RETURN to continue.}
    600 
    601 
    602 %% Simple single-character @ commands
    603 
    604 % @@ prints an @
    605 % Kludge this until the fonts are right (grr).
    606 \def\@{{\tt\char64}}
    607 
    608 % This is turned off because it was never documented
    609 % and you can use @w{...} around a quote to suppress ligatures.
    610 %% Define @` and @' to be the same as ` and '
    611 %% but suppressing ligatures.
    612 %\def\`{{`}}
    613 %\def\'{{'}}
    614 
    615 % Used to generate quoted braces.
    616 \def\mylbrace {{\tt\char123}}
    617 \def\myrbrace {{\tt\char125}}
    618 \let\{=\mylbrace
    619 \let\}=\myrbrace
    620 \begingroup
    621   % Definitions to produce \{ and \} commands for indices,
    622   % and @{ and @} for the aux/toc files.
    623   \catcode`\{ = \other \catcode`\} = \other
    624   \catcode`\[ = 1 \catcode`\] = 2
    625   \catcode`\! = 0 \catcode`\\ = \other
    626   !gdef!lbracecmd[\{]%
    627   !gdef!rbracecmd[\}]%
    628   !gdef!lbraceatcmd[@{]%
    629   !gdef!rbraceatcmd[@}]%
    630 !endgroup
    631 
    632 % @comma{} to avoid , parsing problems.
    633 \let\comma = ,
    634 
    635 % Accents: @, @dotaccent @ringaccent @ubaraccent @udotaccent
    636 % Others are defined by plain TeX: @` @' @" @^ @~ @= @u @v @H.
    637 \let\, = \c
    638 \let\dotaccent = \.
    639 \def\ringaccent#1{{\accent23 #1}}
    640 \let\tieaccent = \t
    641 \let\ubaraccent = \b
    642 \let\udotaccent = \d
    643 
    644 % Other special characters: @questiondown @exclamdown @ordf @ordm
    645 % Plain TeX defines: @AA @AE @O @OE @L (plus lowercase versions) @ss.
    646 \def\questiondown{?`}
    647 \def\exclamdown{!`}
    648 \def\ordf{\leavevmode\raise1ex\hbox{\selectfonts\lllsize \underbar{a}}}
    649 \def\ordm{\leavevmode\raise1ex\hbox{\selectfonts\lllsize \underbar{o}}}
    650 
    651 % Dotless i and dotless j, used for accents.
    652 \def\imacro{i}
    653 \def\jmacro{j}
    654 \def\dotless#1{%
    655   \def\temp{#1}%
    656   \ifx\temp\imacro \ifmmode\imath \else\ptexi \fi
    657   \else\ifx\temp\jmacro \ifmmode\jmath \else\j \fi
    658   \else \errmessage{@dotless can be used only with i or j}%
    659   \fi\fi
    660 }
    661 
    662 % The \TeX{} logo, as in plain, but resetting the spacing so that a
    663 % period following counts as ending a sentence.  (Idea found in latex.)
    664 %
    665 \edef\TeX{\TeX \spacefactor=1000 }
    666 
    667 % @LaTeX{} logo.  Not quite the same results as the definition in
    668 % latex.ltx, since we use a different font for the raised A; it's most
    669 % convenient for us to use an explicitly smaller font, rather than using
    670 % the \scriptstyle font (since we don't reset \scriptstyle and
    671 % \scriptscriptstyle).
    672 %
    673 \def\LaTeX{%
    674   L\kern-.36em
    675   {\setbox0=\hbox{T}%
    676    \vbox to \ht0{\hbox{\selectfonts\lllsize A}\vss}}%
    677   \kern-.15em
    678   \TeX
    679 }
    680 
    681 % Be sure we're in horizontal mode when doing a tie, since we make space
    682 % equivalent to this in @example-like environments. Otherwise, a space
    683 % at the beginning of a line will start with \penalty -- and
    684 % since \penalty is valid in vertical mode, we'd end up putting the
    685 % penalty on the vertical list instead of in the new paragraph.
    686 {\catcode`@ = 11
    687  % Avoid using \@M directly, because that causes trouble
    688  % if the definition is written into an index file.
    689  \global\let\tiepenalty = \@M
    690  \gdef\tie{\leavevmode\penalty\tiepenalty\ }
    691 }
    692 
    693 % @: forces normal size whitespace following.
    694 \def\:{\spacefactor=1000 }
    695 
    696 % @* forces a line break.
    697 \def\*{\hfil\break\hbox{}\ignorespaces}
    698 
    699 % @/ allows a line break.
    700 \let\/=\allowbreak
    701 
    702 % @. is an end-of-sentence period.
    703 \def\.{.\spacefactor=\endofsentencespacefactor\space}
    704 
    705 % @! is an end-of-sentence bang.
    706 \def\!{!\spacefactor=\endofsentencespacefactor\space}
    707 
    708 % @? is an end-of-sentence query.
    709 \def\?{?\spacefactor=\endofsentencespacefactor\space}
    710 
    711 % @frenchspacing on|off  says whether to put extra space after punctuation.
    712 %
    713 \def\onword{on}
    714 \def\offword{off}
    715 %
    716 \parseargdef\frenchspacing{%
    717   \def\temp{#1}%
    718   \ifx\temp\onword \plainfrenchspacing
    719   \else\ifx\temp\offword \plainnonfrenchspacing
    720   \else
    721     \errhelp = \EMsimple
    722     \errmessage{Unknown @frenchspacing option `\temp', must be on/off}%
    723   \fi\fi
    724 }
    725 
    726 % @w prevents a word break.  Without the \leavevmode, @w at the
    727 % beginning of a paragraph, when TeX is still in vertical mode, would
    728 % produce a whole line of output instead of starting the paragraph.
    729 \def\w#1{\leavevmode\hbox{#1}}
    730 
    731 % @group ... @end group forces ... to be all on one page, by enclosing
    732 % it in a TeX vbox.  We use \vtop instead of \vbox to construct the box
    733 % to keep its height that of a normal line.  According to the rules for
    734 % \topskip (p.114 of the TeXbook), the glue inserted is
    735 % max (\topskip - \ht (first item), 0).  If that height is large,
    736 % therefore, no glue is inserted, and the space between the headline and
    737 % the text is small, which looks bad.
    738 %
    739 % Another complication is that the group might be very large.  This can
    740 % cause the glue on the previous page to be unduly stretched, because it
    741 % does not have much material.  In this case, it's better to add an
    742 % explicit \vfill so that the extra space is at the bottom.  The
    743 % threshold for doing this is if the group is more than \vfilllimit
    744 % percent of a page (\vfilllimit can be changed inside of @tex).
    745 %
    746 \newbox\groupbox
    747 \def\vfilllimit{0.7}
    748 %
    749 \envdef\group{%
    750   \ifnum\catcode`\^^M=\active \else
    751     \errhelp = \groupinvalidhelp
    752     \errmessage{@group invalid in context where filling is enabled}%
    753   \fi
    754   \startsavinginserts
    755   %
    756   \setbox\groupbox = \vtop\bgroup
    757     % Do @comment since we are called inside an environment such as
    758     % @example, where each end-of-line in the input causes an
    759     % end-of-line in the output.  We don't want the end-of-line after
    760     % the `@group' to put extra space in the output.  Since @group
    761     % should appear on a line by itself (according to the Texinfo
    762     % manual), we don't worry about eating any user text.
    763     \comment
    764 }
    765 %
    766 % The \vtop produces a box with normal height and large depth; thus, TeX puts
    767 % \baselineskip glue before it, and (when the next line of text is done)
    768 % \lineskip glue after it.  Thus, space below is not quite equal to space
    769 % above.  But it's pretty close.
    770 \def\Egroup{%
    771     % To get correct interline space between the last line of the group
    772     % and the first line afterwards, we have to propagate \prevdepth.
    773     \endgraf % Not \par, as it may have been set to \lisppar.
    774     \global\dimen1 = \prevdepth
    775   \egroup           % End the \vtop.
    776   % \dimen0 is the vertical size of the group's box.
    777   \dimen0 = \ht\groupbox  \advance\dimen0 by \dp\groupbox
    778   % \dimen2 is how much space is left on the page (more or less).
    779   \dimen2 = \pageheight   \advance\dimen2 by -\pagetotal
    780   % if the group doesn't fit on the current page, and it's a big big
    781   % group, force a page break.
    782   \ifdim \dimen0 > \dimen2
    783     \ifdim \pagetotal < \vfilllimit\pageheight
    784       \page
    785     \fi
    786   \fi
    787   \box\groupbox
    788   \prevdepth = \dimen1
    789   \checkinserts
    790 }
    791 %
    792 % TeX puts in an \escapechar (i.e., `@') at the beginning of the help
    793 % message, so this ends up printing `@group can only ...'.
    794 %
    795 \newhelp\groupinvalidhelp{%
    796 group can only be used in environments such as @example,^^J%
    797 where each line of input produces a line of output.}
    798 
    799 % @need space-in-mils
    800 % forces a page break if there is not space-in-mils remaining.
    801 
    802 \newdimen\mil  \mil=0.001in
    803 
    804 % Old definition--didn't work.
    805 %\parseargdef\need{\par %
    806 %% This method tries to make TeX break the page naturally
    807 %% if the depth of the box does not fit.
    808 %{\baselineskip=0pt%
    809 %\vtop to #1\mil{\vfil}\kern -#1\mil\nobreak
    810 %\prevdepth=-1000pt
    811 %}}
    812 
    813 \parseargdef\need{%
    814   % Ensure vertical mode, so we don't make a big box in the middle of a
    815   % paragraph.
    816   \par
    817   %
    818   % If the @need value is less than one line space, it's useless.
    819   \dimen0 = #1\mil
    820   \dimen2 = \ht\strutbox
    821   \advance\dimen2 by \dp\strutbox
    822   \ifdim\dimen0 > \dimen2
    823     %
    824     % Do a \strut just to make the height of this box be normal, so the
    825     % normal leading is inserted relative to the preceding line.
    826     % And a page break here is fine.
    827     \vtop to #1\mil{\strut\vfil}%
    828     %
    829     % TeX does not even consider page breaks if a penalty added to the
    830     % main vertical list is 10000 or more.  But in order to see if the
    831     % empty box we just added fits on the page, we must make it consider
    832     % page breaks.  On the other hand, we don't want to actually break the
    833     % page after the empty box.  So we use a penalty of 9999.
    834     %
    835     % There is an extremely small chance that TeX will actually break the
    836     % page at this \penalty, if there are no other feasible breakpoints in
    837     % sight.  (If the user is using lots of big @group commands, which
    838     % almost-but-not-quite fill up a page, TeX will have a hard time doing
    839     % good page breaking, for example.)  However, I could not construct an
    840     % example where a page broke at this \penalty; if it happens in a real
    841     % document, then we can reconsider our strategy.
    842     \penalty9999
    843     %
    844     % Back up by the size of the box, whether we did a page break or not.
    845     \kern -#1\mil
    846     %
    847     % Do not allow a page break right after this kern.
    848     \nobreak
    849   \fi
    850 }
    851 
    852 % @br   forces paragraph break (and is undocumented).
    853 
    854 \let\br = \par
    855 
    856 % @page forces the start of a new page.
    857 %
    858 \def\page{\par\vfill\supereject}
    859 
    860 % @exdent text....
    861 % outputs text on separate line in roman font, starting at standard page margin
    862 
    863 % This records the amount of indent in the innermost environment.
    864 % That's how much \exdent should take out.
    865 \newskip\exdentamount
    866 
    867 % This defn is used inside fill environments such as @defun.
    868 \parseargdef\exdent{\hfil\break\hbox{\kern -\exdentamount{\rm#1}}\hfil\break}
    869 
    870 % This defn is used inside nofill environments such as @example.
    871 \parseargdef\nofillexdent{{\advance \leftskip by -\exdentamount
    872   \leftline{\hskip\leftskip{\rm#1}}}}
    873 
    874 % @inmargin{WHICH}{TEXT} puts TEXT in the WHICH margin next to the current
    875 % paragraph.  For more general purposes, use the \margin insertion
    876 % class.  WHICH is `l' or `r'.
    877 %
    878 \newskip\inmarginspacing \inmarginspacing=1cm
    879 \def\strutdepth{\dp\strutbox}
    880 %
    881 \def\doinmargin#1#2{\strut\vadjust{%
    882   \nobreak
    883   \kern-\strutdepth
    884   \vtop to \strutdepth{%
    885     \baselineskip=\strutdepth
    886     \vss
    887     % if you have multiple lines of stuff to put here, you'll need to
    888     % make the vbox yourself of the appropriate size.
    889     \ifx#1l%
    890       \llap{\ignorespaces #2\hskip\inmarginspacing}%
    891     \else
    892       \rlap{\hskip\hsize \hskip\inmarginspacing \ignorespaces #2}%
    893     \fi
    894     \null
    895   }%
    896 }}
    897 \def\inleftmargin{\doinmargin l}
    898 \def\inrightmargin{\doinmargin r}
    899 %
    900 % @inmargin{TEXT [, RIGHT-TEXT]}
    901 % (if RIGHT-TEXT is given, use TEXT for left page, RIGHT-TEXT for right;
    902 % else use TEXT for both).
    903 %
    904 \def\inmargin#1{\parseinmargin #1,,\finish}
    905 \def\parseinmargin#1,#2,#3\finish{% not perfect, but better than nothing.
    906   \setbox0 = \hbox{\ignorespaces #2}%
    907   \ifdim\wd0 > 0pt
    908     \def\lefttext{#1}%  have both texts
    909     \def\righttext{#2}%
    910   \else
    911     \def\lefttext{#1}%  have only one text
    912     \def\righttext{#1}%
    913   \fi
    914   %
    915   \ifodd\pageno
    916     \def\temp{\inrightmargin\righttext}% odd page -> outside is right margin
    917   \else
    918     \def\temp{\inleftmargin\lefttext}%
    919   \fi
    920   \temp
    921 }
    922 
    923 % @include FILE -- \input text of FILE.
    924 %
    925 \def\include{\parseargusing\filenamecatcodes\includezzz}
    926 \def\includezzz#1{%
    927   \pushthisfilestack
    928   \def\thisfile{#1}%
    929   {%
    930     \makevalueexpandable  % we want to expand any @value in FILE.
    931     \turnoffactive        % and allow special characters in the expansion
    932     \indexnofonts         % Allow `@@' and other weird things in file names.
    933     \edef\temp{\noexpand\input #1 }%
    934     %
    935     % This trickery is to read FILE outside of a group, in case it makes
    936     % definitions, etc.
    937     \expandafter
    938   }\temp
    939   \popthisfilestack
    940 }
    941 \def\filenamecatcodes{%
    942   \catcode`\\=\other
    943   \catcode`~=\other
    944   \catcode`^=\other
    945   \catcode`_=\other
    946   \catcode`|=\other
    947   \catcode`<=\other
    948   \catcode`>=\other
    949   \catcode`+=\other
    950   \catcode`-=\other
    951   \catcode`\`=\other
    952   \catcode`\'=\other
    953 }
    954 
    955 \def\pushthisfilestack{%
    956   \expandafter\pushthisfilestackX\popthisfilestack\StackTerm
    957 }
    958 \def\pushthisfilestackX{%
    959   \expandafter\pushthisfilestackY\thisfile\StackTerm
    960 }
    961 \def\pushthisfilestackY #1\StackTerm #2\StackTerm {%
    962   \gdef\popthisfilestack{\gdef\thisfile{#1}\gdef\popthisfilestack{#2}}%
    963 }
    964 
    965 \def\popthisfilestack{\errthisfilestackempty}
    966 \def\errthisfilestackempty{\errmessage{Internal error:
    967   the stack of filenames is empty.}}
    968 
    969 \def\thisfile{}
    970 
    971 % @center line
    972 % outputs that line, centered.
    973 %
    974 \parseargdef\center{%
    975   \ifhmode
    976     \let\next\centerH
    977   \else
    978     \let\next\centerV
    979   \fi
    980   \next{\hfil \ignorespaces#1\unskip \hfil}%
    981 }
    982 \def\centerH#1{%
    983   {%
    984     \hfil\break
    985     \advance\hsize by -\leftskip
    986     \advance\hsize by -\rightskip
    987     \line{#1}%
    988     \break
    989   }%
    990 }
    991 \def\centerV#1{\line{\kern\leftskip #1\kern\rightskip}}
    992 
    993 % @sp n   outputs n lines of vertical space
    994 
    995 \parseargdef\sp{\vskip #1\baselineskip}
    996 
    997 % @comment ...line which is ignored...
    998 % @c is the same as @comment
    999 % @ignore ... @end ignore  is another way to write a comment
   1000 
   1001 \def\comment{\begingroup \catcode`\^^M=\other%
   1002 \catcode`\@=\other \catcode`\{=\other \catcode`\}=\other%
   1003 \commentxxx}
   1004 {\catcode`\^^M=\other \gdef\commentxxx#1^^M{\endgroup}}
   1005 
   1006 \let\c=\comment
   1007 
   1008 % @paragraphindent NCHARS
   1009 % We'll use ems for NCHARS, close enough.
   1010 % NCHARS can also be the word `asis' or `none'.
   1011 % We cannot feasibly implement @paragraphindent asis, though.
   1012 %
   1013 \def\asisword{asis} % no translation, these are keywords
   1014 \def\noneword{none}
   1015 %
   1016 \parseargdef\paragraphindent{%
   1017   \def\temp{#1}%
   1018   \ifx\temp\asisword
   1019   \else
   1020     \ifx\temp\noneword
   1021       \defaultparindent = 0pt
   1022     \else
   1023       \defaultparindent = #1em
   1024     \fi
   1025   \fi
   1026   \parindent = \defaultparindent
   1027 }
   1028 
   1029 % @exampleindent NCHARS
   1030 % We'll use ems for NCHARS like @paragraphindent.
   1031 % It seems @exampleindent asis isn't necessary, but
   1032 % I preserve it to make it similar to @paragraphindent.
   1033 \parseargdef\exampleindent{%
   1034   \def\temp{#1}%
   1035   \ifx\temp\asisword
   1036   \else
   1037     \ifx\temp\noneword
   1038       \lispnarrowing = 0pt
   1039     \else
   1040       \lispnarrowing = #1em
   1041     \fi
   1042   \fi
   1043 }
   1044 
   1045 % @firstparagraphindent WORD
   1046 % If WORD is `none', then suppress indentation of the first paragraph
   1047 % after a section heading.  If WORD is `insert', then do indent at such
   1048 % paragraphs.
   1049 %
   1050 % The paragraph indentation is suppressed or not by calling
   1051 % \suppressfirstparagraphindent, which the sectioning commands do.
   1052 % We switch the definition of this back and forth according to WORD.
   1053 % By default, we suppress indentation.
   1054 %
   1055 \def\suppressfirstparagraphindent{\dosuppressfirstparagraphindent}
   1056 \def\insertword{insert}
   1057 %
   1058 \parseargdef\firstparagraphindent{%
   1059   \def\temp{#1}%
   1060   \ifx\temp\noneword
   1061     \let\suppressfirstparagraphindent = \dosuppressfirstparagraphindent
   1062   \else\ifx\temp\insertword
   1063     \let\suppressfirstparagraphindent = \relax
   1064   \else
   1065     \errhelp = \EMsimple
   1066     \errmessage{Unknown @firstparagraphindent option `\temp'}%
   1067   \fi\fi
   1068 }
   1069 
   1070 % Here is how we actually suppress indentation.  Redefine \everypar to
   1071 % \kern backwards by \parindent, and then reset itself to empty.
   1072 %
   1073 % We also make \indent itself not actually do anything until the next
   1074 % paragraph.
   1075 %
   1076 \gdef\dosuppressfirstparagraphindent{%
   1077   \gdef\indent{%
   1078     \restorefirstparagraphindent
   1079     \indent
   1080   }%
   1081   \gdef\noindent{%
   1082     \restorefirstparagraphindent
   1083     \noindent
   1084   }%
   1085   \global\everypar = {%
   1086     \kern -\parindent
   1087     \restorefirstparagraphindent
   1088   }%
   1089 }
   1090 
   1091 \gdef\restorefirstparagraphindent{%
   1092   \global \let \indent = \ptexindent
   1093   \global \let \noindent = \ptexnoindent
   1094   \global \everypar = {}%
   1095 }
   1096 
   1097 
   1098 % @asis just yields its argument.  Used with @table, for example.
   1099 %
   1100 \def\asis#1{#1}
   1101 
   1102 % @math outputs its argument in math mode.
   1103 %
   1104 % One complication: _ usually means subscripts, but it could also mean
   1105 % an actual _ character, as in @math{@var{some_variable} + 1}.  So make
   1106 % _ active, and distinguish by seeing if the current family is \slfam,
   1107 % which is what @var uses.
   1108 {
   1109   \catcode`\_ = \active
   1110   \gdef\mathunderscore{%
   1111     \catcode`\_=\active
   1112     \def_{\ifnum\fam=\slfam \_\else\sb\fi}%
   1113   }
   1114 }
   1115 % Another complication: we want \\ (and @\) to output a \ character.
   1116 % FYI, plain.tex uses \\ as a temporary control sequence (why?), but
   1117 % this is not advertised and we don't care.  Texinfo does not
   1118 % otherwise define @\.
   1119 %
   1120 % The \mathchar is class=0=ordinary, family=7=ttfam, position=5C=\.
   1121 \def\mathbackslash{\ifnum\fam=\ttfam \mathchar"075C \else\backslash \fi}
   1122 %
   1123 \def\math{%
   1124   \tex
   1125   \mathunderscore
   1126   \let\\ = \mathbackslash
   1127   \mathactive
   1128   % make the texinfo accent commands work in math mode
   1129   \let\"=\ddot
   1130   \let\'=\acute
   1131   \let\==\bar
   1132   \let\^=\hat
   1133   \let\`=\grave
   1134   \let\u=\breve
   1135   \let\v=\check
   1136   \let\~=\tilde
   1137   \let\dotaccent=\dot
   1138   $\finishmath
   1139 }
   1140 \def\finishmath#1{#1$\endgroup}  % Close the group opened by \tex.
   1141 
   1142 % Some active characters (such as <) are spaced differently in math.
   1143 % We have to reset their definitions in case the @math was an argument
   1144 % to a command which sets the catcodes (such as @item or @section).
   1145 %
   1146 {
   1147   \catcode`^ = \active
   1148   \catcode`< = \active
   1149   \catcode`> = \active
   1150   \catcode`+ = \active
   1151   \catcode`' = \active
   1152   \gdef\mathactive{%
   1153     \let^ = \ptexhat
   1154     \let< = \ptexless
   1155     \let> = \ptexgtr
   1156     \let+ = \ptexplus
   1157     \let' = \ptexquoteright
   1158   }
   1159 }
   1160 
   1161 % Some math mode symbols.
   1162 \def\bullet{$\ptexbullet$}
   1163 \def\geq{\ifmmode \ge\else $\ge$\fi}
   1164 \def\leq{\ifmmode \le\else $\le$\fi}
   1165 \def\minus{\ifmmode -\else $-$\fi}
   1166 
   1167 % @dots{} outputs an ellipsis using the current font.
   1168 % We do .5em per period so that it has the same spacing in the cm
   1169 % typewriter fonts as three actual period characters; on the other hand,
   1170 % in other typewriter fonts three periods are wider than 1.5em.  So do
   1171 % whichever is larger.
   1172 %
   1173 \def\dots{%
   1174   \leavevmode
   1175   \setbox0=\hbox{...}% get width of three periods
   1176   \ifdim\wd0 > 1.5em
   1177     \dimen0 = \wd0
   1178   \else
   1179     \dimen0 = 1.5em
   1180   \fi
   1181   \hbox to \dimen0{%
   1182     \hskip 0pt plus.25fil
   1183     .\hskip 0pt plus1fil
   1184     .\hskip 0pt plus1fil
   1185     .\hskip 0pt plus.5fil
   1186   }%
   1187 }
   1188 
   1189 % @enddots{} is an end-of-sentence ellipsis.
   1190 %
   1191 \def\enddots{%
   1192   \dots
   1193   \spacefactor=\endofsentencespacefactor
   1194 }
   1195 
   1196 % @comma{} is so commas can be inserted into text without messing up
   1197 % Texinfo's parsing.
   1198 %
   1199 \let\comma = ,
   1200 
   1201 % @refill is a no-op.
   1202 \let\refill=\relax
   1203 
   1204 % If working on a large document in chapters, it is convenient to
   1205 % be able to disable indexing, cross-referencing, and contents, for test runs.
   1206 % This is done with @novalidate (before @setfilename).
   1207 %
   1208 \newif\iflinks \linkstrue % by default we want the aux files.
   1209 \let\novalidate = \linksfalse
   1210 
   1211 % @setfilename is done at the beginning of every texinfo file.
   1212 % So open here the files we need to have open while reading the input.
   1213 % This makes it possible to make a .fmt file for texinfo.
   1214 \def\setfilename{%
   1215    \fixbackslash  % Turn off hack to swallow `\input texinfo'.
   1216    \iflinks
   1217      \tryauxfile
   1218      % Open the new aux file.  TeX will close it automatically at exit.
   1219      \immediate\openout\auxfile=\jobname.aux
   1220    \fi % \openindices needs to do some work in any case.
   1221    \openindices
   1222    \let\setfilename=\comment % Ignore extra @setfilename cmds.
   1223    %
   1224    % If texinfo.cnf is present on the system, read it.
   1225    % Useful for site-wide @afourpaper, etc.
   1226    \openin 1 texinfo.cnf
   1227    \ifeof 1 \else \input texinfo.cnf \fi
   1228    \closein 1
   1229    %
   1230    \comment % Ignore the actual filename.
   1231 }
   1232 
   1233 % Called from \setfilename.
   1234 %
   1235 \def\openindices{%
   1236   \newindex{cp}%
   1237   \newcodeindex{fn}%
   1238   \newcodeindex{vr}%
   1239   \newcodeindex{tp}%
   1240   \newcodeindex{ky}%
   1241   \newcodeindex{pg}%
   1242 }
   1243 
   1244 % @bye.
   1245 \outer\def\bye{\pagealignmacro\tracingstats=1\ptexend}
   1246 
   1247 
   1248 \message{pdf,}
   1249 % adobe `portable' document format
   1250 \newcount\tempnum
   1251 \newcount\lnkcount
   1252 \newtoks\filename
   1253 \newcount\filenamelength
   1254 \newcount\pgn
   1255 \newtoks\toksA
   1256 \newtoks\toksB
   1257 \newtoks\toksC
   1258 \newtoks\toksD
   1259 \newbox\boxA
   1260 \newcount\countA
   1261 \newif\ifpdf
   1262 \newif\ifpdfmakepagedest
   1263 
   1264 % when pdftex is run in dvi mode, \pdfoutput is defined (so \pdfoutput=1
   1265 % can be set).  So we test for \relax and 0 as well as \undefined,
   1266 % borrowed from ifpdf.sty.
   1267 \ifx\pdfoutput\undefined
   1268 \else
   1269   \ifx\pdfoutput\relax
   1270   \else
   1271     \ifcase\pdfoutput
   1272     \else
   1273       \pdftrue
   1274     \fi
   1275   \fi
   1276 \fi
   1277 
   1278 % PDF uses PostScript string constants for the names of xref targets,
   1279 % for display in the outlines, and in other places.  Thus, we have to
   1280 % double any backslashes.  Otherwise, a name like "\node" will be
   1281 % interpreted as a newline (\n), followed by o, d, e.  Not good.
   1282 % http://www.ntg.nl/pipermail/ntg-pdftex/2004-July/000654.html
   1283 % (and related messages, the final outcome is that it is up to the TeX
   1284 % user to double the backslashes and otherwise make the string valid, so
   1285 % that's what we do).
   1286 
   1287 % double active backslashes.
   1288 %
   1289 {\catcode`\@=0 \catcode`\\=\active
   1290  @gdef@activebackslashdouble{%
   1291    @catcode`@\=@active
   1292    @let\=@doublebackslash}
   1293 }
   1294 
   1295 % To handle parens, we must adopt a different approach, since parens are
   1296 % not active characters.  hyperref.dtx (which has the same problem as
   1297 % us) handles it with this amazing macro to replace tokens, with minor
   1298 % changes for Texinfo.  It is included here under the GPL by permission
   1299 % from the author, Heiko Oberdiek.
   1300 %
   1301 % #1 is the tokens to replace.
   1302 % #2 is the replacement.
   1303 % #3 is the control sequence with the string.
   1304 %
   1305 \def\HyPsdSubst#1#2#3{%
   1306   \def\HyPsdReplace##1#1##2\END{%
   1307     ##1%
   1308     \ifx\\##2\\%
   1309     \else
   1310       #2%
   1311       \HyReturnAfterFi{%
   1312         \HyPsdReplace##2\END
   1313       }%
   1314     \fi
   1315   }%
   1316   \xdef#3{\expandafter\HyPsdReplace#3#1\END}%
   1317 }
   1318 \long\def\HyReturnAfterFi#1\fi{\fi#1}
   1319 
   1320 % #1 is a control sequence in which to do the replacements.
   1321 \def\backslashparens#1{%
   1322   \xdef#1{#1}% redefine it as its expansion; the definition is simply
   1323              % \lastnode when called from \setref -> \pdfmkdest.
   1324   \HyPsdSubst{(}{\realbackslash(}{#1}%
   1325   \HyPsdSubst{)}{\realbackslash)}{#1}%
   1326 }
   1327 
   1328 \newhelp\nopdfimagehelp{Texinfo supports .png, .jpg, .jpeg, and .pdf images
   1329 with PDF output, and none of those formats could be found.  (.eps cannot
   1330 be supported due to the design of the PDF format; use regular TeX (DVI
   1331 output) for that.)}
   1332 
   1333 \ifpdf
   1334   %
   1335   % Color manipulation macros based on pdfcolor.tex.
   1336   \def\cmykDarkRed{0.28 1 1 0.35}
   1337   \def\cmykBlack{0 0 0 1}
   1338   %
   1339   % k sets the color for filling (usual text, etc.);
   1340   % K sets the color for stroking (thin rules, e.g., normal _'s).
   1341   \def\pdfsetcolor#1{\pdfliteral{#1 k  #1 K}}
   1342   %
   1343   % Set color, and create a mark which defines \thiscolor accordingly,
   1344   % so that \makeheadline knows which color to restore.
   1345   \def\setcolor#1{%
   1346     \xdef\lastcolordefs{\gdef\noexpand\thiscolor{#1}}%
   1347     \domark
   1348     \pdfsetcolor{#1}%
   1349   }
   1350   %
   1351   \def\maincolor{\cmykBlack}
   1352   \pdfsetcolor{\maincolor}
   1353   \edef\thiscolor{\maincolor}
   1354   \def\lastcolordefs{}
   1355   %
   1356   \def\makefootline{%
   1357     \baselineskip24pt
   1358     \line{\pdfsetcolor{\maincolor}\the\footline}%
   1359   }
   1360   %
   1361   \def\makeheadline{%
   1362     \vbox to 0pt{%
   1363       \vskip-22.5pt
   1364       \line{%
   1365         \vbox to8.5pt{}%
   1366         % Extract \thiscolor definition from the marks.
   1367         \getcolormarks
   1368         % Typeset the headline with \maincolor, then restore the color.
   1369         \pdfsetcolor{\maincolor}\the\headline\pdfsetcolor{\thiscolor}%
   1370       }%
   1371       \vss
   1372     }%
   1373     \nointerlineskip
   1374   }
   1375   %
   1376   %
   1377   \pdfcatalog{/PageMode /UseOutlines}
   1378   %
   1379   % #1 is image name, #2 width (might be empty/whitespace), #3 height (ditto).
   1380   \def\dopdfimage#1#2#3{%
   1381     \def\imagewidth{#2}\setbox0 = \hbox{\ignorespaces #2}%
   1382     \def\imageheight{#3}\setbox2 = \hbox{\ignorespaces #3}%
   1383     %
   1384     % pdftex (and the PDF format) support .png, .jpg, .pdf (among
   1385     % others).  Let's try in that order.
   1386     \let\pdfimgext=\empty
   1387     \begingroup
   1388       \openin 1 #1.png \ifeof 1
   1389         \openin 1 #1.jpg \ifeof 1
   1390           \openin 1 #1.jpeg \ifeof 1
   1391             \openin 1 #1.JPG \ifeof 1
   1392               \openin 1 #1.pdf \ifeof 1
   1393                 \openin 1 #1.PDF \ifeof 1
   1394                   \errhelp = \nopdfimagehelp
   1395                   \errmessage{Could not find image file #1 for pdf}%
   1396                 \else \gdef\pdfimgext{PDF}%
   1397                 \fi
   1398               \else \gdef\pdfimgext{pdf}%
   1399               \fi
   1400             \else \gdef\pdfimgext{JPG}%
   1401             \fi
   1402           \else \gdef\pdfimgext{jpeg}%
   1403           \fi
   1404         \else \gdef\pdfimgext{jpg}%
   1405         \fi
   1406       \else \gdef\pdfimgext{png}%
   1407       \fi
   1408       \closein 1
   1409     \endgroup
   1410     %
   1411     % without \immediate, ancient pdftex seg faults when the same image is
   1412     % included twice.  (Version 3.14159-pre-1.0-unofficial-20010704.)
   1413     \ifnum\pdftexversion < 14
   1414       \immediate\pdfimage
   1415     \else
   1416       \immediate\pdfximage
   1417     \fi
   1418       \ifdim \wd0 >0pt width \imagewidth \fi
   1419       \ifdim \wd2 >0pt height \imageheight \fi
   1420       \ifnum\pdftexversion<13
   1421          #1.\pdfimgext
   1422        \else
   1423          {#1.\pdfimgext}%
   1424        \fi
   1425     \ifnum\pdftexversion < 14 \else
   1426       \pdfrefximage \pdflastximage
   1427     \fi}
   1428   %
   1429   \def\pdfmkdest#1{{%
   1430     % We have to set dummies so commands such as @code, and characters
   1431     % such as \, aren't expanded when present in a section title.
   1432     \indexnofonts
   1433     \turnoffactive
   1434     \activebackslashdouble
   1435     \makevalueexpandable
   1436     \def\pdfdestname{#1}%
   1437     \backslashparens\pdfdestname
   1438     \safewhatsit{\pdfdest name{\pdfdestname} xyz}%
   1439   }}
   1440   %
   1441   % used to mark target names; must be expandable.
   1442   \def\pdfmkpgn#1{#1}
   1443   %
   1444   % by default, use a color that is dark enough to print on paper as
   1445   % nearly black, but still distinguishable for online viewing.
   1446   \def\urlcolor{\cmykDarkRed}
   1447   \def\linkcolor{\cmykDarkRed}
   1448   \def\endlink{\setcolor{\maincolor}\pdfendlink}
   1449   %
   1450   % Adding outlines to PDF; macros for calculating structure of outlines
   1451   % come from Petr Olsak
   1452   \def\expnumber#1{\expandafter\ifx\csname#1\endcsname\relax 0%
   1453     \else \csname#1\endcsname \fi}
   1454   \def\advancenumber#1{\tempnum=\expnumber{#1}\relax
   1455     \advance\tempnum by 1
   1456     \expandafter\xdef\csname#1\endcsname{\the\tempnum}}
   1457   %
   1458   % #1 is the section text, which is what will be displayed in the
   1459   % outline by the pdf viewer.  #2 is the pdf expression for the number
   1460   % of subentries (or empty, for subsubsections).  #3 is the node text,
   1461   % which might be empty if this toc entry had no corresponding node.
   1462   % #4 is the page number
   1463   %
   1464   \def\dopdfoutline#1#2#3#4{%
   1465     % Generate a link to the node text if that exists; else, use the
   1466     % page number.  We could generate a destination for the section
   1467     % text in the case where a section has no node, but it doesn't
   1468     % seem worth the trouble, since most documents are normally structured.
   1469     \def\pdfoutlinedest{#3}%
   1470     \ifx\pdfoutlinedest\empty
   1471       \def\pdfoutlinedest{#4}%
   1472     \else
   1473       % Doubled backslashes in the name.
   1474       {\activebackslashdouble \xdef\pdfoutlinedest{#3}%
   1475        \backslashparens\pdfoutlinedest}%
   1476     \fi
   1477     %
   1478     % Also double the backslashes in the display string.
   1479     {\activebackslashdouble \xdef\pdfoutlinetext{#1}%
   1480      \backslashparens\pdfoutlinetext}%
   1481     %
   1482     \pdfoutline goto name{\pdfmkpgn{\pdfoutlinedest}}#2{\pdfoutlinetext}%
   1483   }
   1484   %
   1485   \def\pdfmakeoutlines{%
   1486     \begingroup
   1487       % Thanh's hack / proper braces in bookmarks
   1488       \edef\mylbrace{\iftrue \string{\else}\fi}\let\{=\mylbrace
   1489       \edef\myrbrace{\iffalse{\else\string}\fi}\let\}=\myrbrace
   1490       %
   1491       % Read toc silently, to get counts of subentries for \pdfoutline.
   1492       \def\numchapentry##1##2##3##4{%
   1493 	\def\thischapnum{##2}%
   1494 	\def\thissecnum{0}%
   1495 	\def\thissubsecnum{0}%
   1496       }%
   1497       \def\numsecentry##1##2##3##4{%
   1498 	\advancenumber{chap\thischapnum}%
   1499 	\def\thissecnum{##2}%
   1500 	\def\thissubsecnum{0}%
   1501       }%
   1502       \def\numsubsecentry##1##2##3##4{%
   1503 	\advancenumber{sec\thissecnum}%
   1504 	\def\thissubsecnum{##2}%
   1505       }%
   1506       \def\numsubsubsecentry##1##2##3##4{%
   1507 	\advancenumber{subsec\thissubsecnum}%
   1508       }%
   1509       \def\thischapnum{0}%
   1510       \def\thissecnum{0}%
   1511       \def\thissubsecnum{0}%
   1512       %
   1513       % use \def rather than \let here because we redefine \chapentry et
   1514       % al. a second time, below.
   1515       \def\appentry{\numchapentry}%
   1516       \def\appsecentry{\numsecentry}%
   1517       \def\appsubsecentry{\numsubsecentry}%
   1518       \def\appsubsubsecentry{\numsubsubsecentry}%
   1519       \def\unnchapentry{\numchapentry}%
   1520       \def\unnsecentry{\numsecentry}%
   1521       \def\unnsubsecentry{\numsubsecentry}%
   1522       \def\unnsubsubsecentry{\numsubsubsecentry}%
   1523       \readdatafile{toc}%
   1524       %
   1525       % Read toc second time, this time actually producing the outlines.
   1526       % The `-' means take the \expnumber as the absolute number of
   1527       % subentries, which we calculated on our first read of the .toc above.
   1528       %
   1529       % We use the node names as the destinations.
   1530       \def\numchapentry##1##2##3##4{%
   1531         \dopdfoutline{##1}{count-\expnumber{chap##2}}{##3}{##4}}%
   1532       \def\numsecentry##1##2##3##4{%
   1533         \dopdfoutline{##1}{count-\expnumber{sec##2}}{##3}{##4}}%
   1534       \def\numsubsecentry##1##2##3##4{%
   1535         \dopdfoutline{##1}{count-\expnumber{subsec##2}}{##3}{##4}}%
   1536       \def\numsubsubsecentry##1##2##3##4{% count is always zero
   1537         \dopdfoutline{##1}{}{##3}{##4}}%
   1538       %
   1539       % PDF outlines are displayed using system fonts, instead of
   1540       % document fonts.  Therefore we cannot use special characters,
   1541       % since the encoding is unknown.  For example, the eogonek from
   1542       % Latin 2 (0xea) gets translated to a | character.  Info from
   1543       % Staszek Wawrykiewicz, 19 Jan 2004 04:09:24 +0100.
   1544       %
   1545       % xx to do this right, we have to translate 8-bit characters to
   1546       % their "best" equivalent, based on the @documentencoding.  Right
   1547       % now, I guess we'll just let the pdf reader have its way.
   1548       \indexnofonts
   1549       \setupdatafile
   1550       \catcode`\\=\active \otherbackslash
   1551       \input \tocreadfilename
   1552     \endgroup
   1553   }
   1554   %
   1555   \def\skipspaces#1{\def\PP{#1}\def\D{|}%
   1556     \ifx\PP\D\let\nextsp\relax
   1557     \else\let\nextsp\skipspaces
   1558       \ifx\p\space\else\addtokens{\filename}{\PP}%
   1559         \advance\filenamelength by 1
   1560       \fi
   1561     \fi
   1562     \nextsp}
   1563   \def\getfilename#1{\filenamelength=0\expandafter\skipspaces#1|\relax}
   1564   \ifnum\pdftexversion < 14
   1565     \let \startlink \pdfannotlink
   1566   \else
   1567     \let \startlink \pdfstartlink
   1568   \fi
   1569   % make a live url in pdf output.
   1570   \def\pdfurl#1{%
   1571     \begingroup
   1572       % it seems we really need yet another set of dummies; have not
   1573       % tried to figure out what each command should do in the context
   1574       % of @url.  for now, just make @/ a no-op, that's the only one
   1575       % people have actually reported a problem with.
   1576       %
   1577       \normalturnoffactive
   1578       \def\@{@}%
   1579       \let\/=\empty
   1580       \makevalueexpandable
   1581       % do we want to go so far as to use \indexnofonts instead of just
   1582       % special-casing \var here?
   1583       \def\var##1{##1}%
   1584       %
   1585       \leavevmode\setcolor{\urlcolor}%
   1586       \startlink attr{/Border [0 0 0]}%
   1587         user{/Subtype /Link /A << /S /URI /URI (#1) >>}%
   1588     \endgroup}
   1589   \def\pdfgettoks#1.{\setbox\boxA=\hbox{\toksA={#1.}\toksB={}\maketoks}}
   1590   \def\addtokens#1#2{\edef\addtoks{\noexpand#1={\the#1#2}}\addtoks}
   1591   \def\adn#1{\addtokens{\toksC}{#1}\global\countA=1\let\next=\maketoks}
   1592   \def\poptoks#1#2|ENDTOKS|{\let\first=#1\toksD={#1}\toksA={#2}}
   1593   \def\maketoks{%
   1594     \expandafter\poptoks\the\toksA|ENDTOKS|\relax
   1595     \ifx\first0\adn0
   1596     \else\ifx\first1\adn1 \else\ifx\first2\adn2 \else\ifx\first3\adn3
   1597     \else\ifx\first4\adn4 \else\ifx\first5\adn5 \else\ifx\first6\adn6
   1598     \else\ifx\first7\adn7 \else\ifx\first8\adn8 \else\ifx\first9\adn9
   1599     \else
   1600       \ifnum0=\countA\else\makelink\fi
   1601       \ifx\first.\let\next=\done\else
   1602         \let\next=\maketoks
   1603         \addtokens{\toksB}{\the\toksD}
   1604         \ifx\first,\addtokens{\toksB}{\space}\fi
   1605       \fi
   1606     \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
   1607     \next}
   1608   \def\makelink{\addtokens{\toksB}%
   1609     {\noexpand\pdflink{\the\toksC}}\toksC={}\global\countA=0}
   1610   \def\pdflink#1{%
   1611     \startlink attr{/Border [0 0 0]} goto name{\pdfmkpgn{#1}}
   1612     \setcolor{\linkcolor}#1\endlink}
   1613   \def\done{\edef\st{\global\noexpand\toksA={\the\toksB}}\st}
   1614 \else
   1615   % non-pdf mode
   1616   \let\pdfmkdest = \gobble
   1617   \let\pdfurl = \gobble
   1618   \let\endlink = \relax
   1619   \let\setcolor = \gobble
   1620   \let\pdfsetcolor = \gobble
   1621   \let\pdfmakeoutlines = \relax
   1622 \fi  % \ifx\pdfoutput
   1623 
   1624 
   1625 \message{fonts,}
   1626 
   1627 % Change the current font style to #1, remembering it in \curfontstyle.
   1628 % For now, we do not accumulate font styles: @b{@i{foo}} prints foo in
   1629 % italics, not bold italics.
   1630 %
   1631 \def\setfontstyle#1{%
   1632   \def\curfontstyle{#1}% not as a control sequence, because we are \edef'd.
   1633   \csname ten#1\endcsname  % change the current font
   1634 }
   1635 
   1636 % Select #1 fonts with the current style.
   1637 %
   1638 \def\selectfonts#1{\csname #1fonts\endcsname \csname\curfontstyle\endcsname}
   1639 
   1640 \def\rm{\fam=0 \setfontstyle{rm}}
   1641 \def\it{\fam=\itfam \setfontstyle{it}}
   1642 \def\sl{\fam=\slfam \setfontstyle{sl}}
   1643 \def\bf{\fam=\bffam \setfontstyle{bf}}\def\bfstylename{bf}
   1644 \def\tt{\fam=\ttfam \setfontstyle{tt}}
   1645 
   1646 % Unfortunately, we have to override this for titles and the like, since
   1647 % in those cases "rm" is bold.  Sigh.
   1648 \def\rmisbold{\rm\def\curfontstyle{bf}}
   1649 
   1650 % Texinfo sort of supports the sans serif font style, which plain TeX does not.
   1651 % So we set up a \sf.
   1652 \newfam\sffam
   1653 \def\sf{\fam=\sffam \setfontstyle{sf}}
   1654 \let\li = \sf % Sometimes we call it \li, not \sf.
   1655 
   1656 % We don't need math for this font style.
   1657 \def\ttsl{\setfontstyle{ttsl}}
   1658 
   1659 
   1660 % Default leading.
   1661 \newdimen\textleading  \textleading = 13.2pt
   1662 
   1663 % Set the baselineskip to #1, and the lineskip and strut size
   1664 % correspondingly.  There is no deep meaning behind these magic numbers
   1665 % used as factors; they just match (closely enough) what Knuth defined.
   1666 %
   1667 \def\lineskipfactor{.08333}
   1668 \def\strutheightpercent{.70833}
   1669 \def\strutdepthpercent {.29167}
   1670 %
   1671 % can get a sort of poor man's double spacing by redefining this.
   1672 \def\baselinefactor{1}
   1673 %
   1674 \def\setleading#1{%
   1675   \dimen0 = #1\relax
   1676   \normalbaselineskip = \baselinefactor\dimen0
   1677   \normallineskip = \lineskipfactor\normalbaselineskip
   1678   \normalbaselines
   1679   \setbox\strutbox =\hbox{%
   1680     \vrule width0pt height\strutheightpercent\baselineskip
   1681                     depth \strutdepthpercent \baselineskip
   1682   }%
   1683 }
   1684 
   1685 % PDF CMaps.  See also LaTeX's t1.cmap.
   1686 %
   1687 % do nothing with this by default.
   1688 \expandafter\let\csname cmapOT1\endcsname\gobble
   1689 \expandafter\let\csname cmapOT1IT\endcsname\gobble
   1690 \expandafter\let\csname cmapOT1TT\endcsname\gobble
   1691 
   1692 % if we are producing pdf, and we have \pdffontattr, then define cmaps.
   1693 % (\pdffontattr was introduced many years ago, but people still run
   1694 % older pdftex's; it's easy to conditionalize, so we do.)
   1695 \ifpdf \ifx\pdffontattr\undefined \else
   1696   \begingroup
   1697     \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
   1698     \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
   1699 %%DocumentNeededResources: ProcSet (CIDInit)
   1700 %%IncludeResource: ProcSet (CIDInit)
   1701 %%BeginResource: CMap (TeX-OT1-0)
   1702 %%Title: (TeX-OT1-0 TeX OT1 0)
   1703 %%Version: 1.000
   1704 %%EndComments
   1705 /CIDInit /ProcSet findresource begin
   1706 12 dict begin
   1707 begincmap
   1708 /CIDSystemInfo
   1709 << /Registry (TeX)
   1710 /Ordering (OT1)
   1711 /Supplement 0
   1712 >> def
   1713 /CMapName /TeX-OT1-0 def
   1714 /CMapType 2 def
   1715 1 begincodespacerange
   1716 <00> <7F>
   1717 endcodespacerange
   1718 8 beginbfrange
   1719 <00> <01> <0393>
   1720 <09> <0A> <03A8>
   1721 <23> <26> <0023>
   1722 <28> <3B> <0028>
   1723 <3F> <5B> <003F>
   1724 <5D> <5E> <005D>
   1725 <61> <7A> <0061>
   1726 <7B> <7C> <2013>
   1727 endbfrange
   1728 40 beginbfchar
   1729 <02> <0398>
   1730 <03> <039B>
   1731 <04> <039E>
   1732 <05> <03A0>
   1733 <06> <03A3>
   1734 <07> <03D2>
   1735 <08> <03A6>
   1736 <0B> <00660066>
   1737 <0C> <00660069>
   1738 <0D> <0066006C>
   1739 <0E> <006600660069>
   1740 <0F> <00660066006C>
   1741 <10> <0131>
   1742 <11> <0237>
   1743 <12> <0060>
   1744 <13> <00B4>
   1745 <14> <02C7>
   1746 <15> <02D8>
   1747 <16> <00AF>
   1748 <17> <02DA>
   1749 <18> <00B8>
   1750 <19> <00DF>
   1751 <1A> <00E6>
   1752 <1B> <0153>
   1753 <1C> <00F8>
   1754 <1D> <00C6>
   1755 <1E> <0152>
   1756 <1F> <00D8>
   1757 <21> <0021>
   1758 <22> <201D>
   1759 <27> <2019>
   1760 <3C> <00A1>
   1761 <3D> <003D>
   1762 <3E> <00BF>
   1763 <5C> <201C>
   1764 <5F> <02D9>
   1765 <60> <2018>
   1766 <7D> <02DD>
   1767 <7E> <007E>
   1768 <7F> <00A8>
   1769 endbfchar
   1770 endcmap
   1771 CMapName currentdict /CMap defineresource pop
   1772 end
   1773 end
   1774 %%EndResource
   1775 %%EOF
   1776     }\endgroup
   1777   \expandafter\edef\csname cmapOT1\endcsname#1{%
   1778     \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
   1779   }%
   1780 %
   1781 % \cmapOT1IT
   1782   \begingroup
   1783     \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
   1784     \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
   1785 %%DocumentNeededResources: ProcSet (CIDInit)
   1786 %%IncludeResource: ProcSet (CIDInit)
   1787 %%BeginResource: CMap (TeX-OT1IT-0)
   1788 %%Title: (TeX-OT1IT-0 TeX OT1IT 0)
   1789 %%Version: 1.000
   1790 %%EndComments
   1791 /CIDInit /ProcSet findresource begin
   1792 12 dict begin
   1793 begincmap
   1794 /CIDSystemInfo
   1795 << /Registry (TeX)
   1796 /Ordering (OT1IT)
   1797 /Supplement 0
   1798 >> def
   1799 /CMapName /TeX-OT1IT-0 def
   1800 /CMapType 2 def
   1801 1 begincodespacerange
   1802 <00> <7F>
   1803 endcodespacerange
   1804 8 beginbfrange
   1805 <00> <01> <0393>
   1806 <09> <0A> <03A8>
   1807 <25> <26> <0025>
   1808 <28> <3B> <0028>
   1809 <3F> <5B> <003F>
   1810 <5D> <5E> <005D>
   1811 <61> <7A> <0061>
   1812 <7B> <7C> <2013>
   1813 endbfrange
   1814 42 beginbfchar
   1815 <02> <0398>
   1816 <03> <039B>
   1817 <04> <039E>
   1818 <05> <03A0>
   1819 <06> <03A3>
   1820 <07> <03D2>
   1821 <08> <03A6>
   1822 <0B> <00660066>
   1823 <0C> <00660069>
   1824 <0D> <0066006C>
   1825 <0E> <006600660069>
   1826 <0F> <00660066006C>
   1827 <10> <0131>
   1828 <11> <0237>
   1829 <12> <0060>
   1830 <13> <00B4>
   1831 <14> <02C7>
   1832 <15> <02D8>
   1833 <16> <00AF>
   1834 <17> <02DA>
   1835 <18> <00B8>
   1836 <19> <00DF>
   1837 <1A> <00E6>
   1838 <1B> <0153>
   1839 <1C> <00F8>
   1840 <1D> <00C6>
   1841 <1E> <0152>
   1842 <1F> <00D8>
   1843 <21> <0021>
   1844 <22> <201D>
   1845 <23> <0023>
   1846 <24> <00A3>
   1847 <27> <2019>
   1848 <3C> <00A1>
   1849 <3D> <003D>
   1850 <3E> <00BF>
   1851 <5C> <201C>
   1852 <5F> <02D9>
   1853 <60> <2018>
   1854 <7D> <02DD>
   1855 <7E> <007E>
   1856 <7F> <00A8>
   1857 endbfchar
   1858 endcmap
   1859 CMapName currentdict /CMap defineresource pop
   1860 end
   1861 end
   1862 %%EndResource
   1863 %%EOF
   1864     }\endgroup
   1865   \expandafter\edef\csname cmapOT1IT\endcsname#1{%
   1866     \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
   1867   }%
   1868 %
   1869 % \cmapOT1TT
   1870   \begingroup
   1871     \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
   1872     \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
   1873 %%DocumentNeededResources: ProcSet (CIDInit)
   1874 %%IncludeResource: ProcSet (CIDInit)
   1875 %%BeginResource: CMap (TeX-OT1TT-0)
   1876 %%Title: (TeX-OT1TT-0 TeX OT1TT 0)
   1877 %%Version: 1.000
   1878 %%EndComments
   1879 /CIDInit /ProcSet findresource begin
   1880 12 dict begin
   1881 begincmap
   1882 /CIDSystemInfo
   1883 << /Registry (TeX)
   1884 /Ordering (OT1TT)
   1885 /Supplement 0
   1886 >> def
   1887 /CMapName /TeX-OT1TT-0 def
   1888 /CMapType 2 def
   1889 1 begincodespacerange
   1890 <00> <7F>
   1891 endcodespacerange
   1892 5 beginbfrange
   1893 <00> <01> <0393>
   1894 <09> <0A> <03A8>
   1895 <21> <26> <0021>
   1896 <28> <5F> <0028>
   1897 <61> <7E> <0061>
   1898 endbfrange
   1899 32 beginbfchar
   1900 <02> <0398>
   1901 <03> <039B>
   1902 <04> <039E>
   1903 <05> <03A0>
   1904 <06> <03A3>
   1905 <07> <03D2>
   1906 <08> <03A6>
   1907 <0B> <2191>
   1908 <0C> <2193>
   1909 <0D> <0027>
   1910 <0E> <00A1>
   1911 <0F> <00BF>
   1912 <10> <0131>
   1913 <11> <0237>
   1914 <12> <0060>
   1915 <13> <00B4>
   1916 <14> <02C7>
   1917 <15> <02D8>
   1918 <16> <00AF>
   1919 <17> <02DA>
   1920 <18> <00B8>
   1921 <19> <00DF>
   1922 <1A> <00E6>
   1923 <1B> <0153>
   1924 <1C> <00F8>
   1925 <1D> <00C6>
   1926 <1E> <0152>
   1927 <1F> <00D8>
   1928 <20> <2423>
   1929 <27> <2019>
   1930 <60> <2018>
   1931 <7F> <00A8>
   1932 endbfchar
   1933 endcmap
   1934 CMapName currentdict /CMap defineresource pop
   1935 end
   1936 end
   1937 %%EndResource
   1938 %%EOF
   1939     }\endgroup
   1940   \expandafter\edef\csname cmapOT1TT\endcsname#1{%
   1941     \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
   1942   }%
   1943 \fi\fi
   1944 
   1945 
   1946 % Set the font macro #1 to the font named #2, adding on the
   1947 % specified font prefix (normally `cm').
   1948 % #3 is the font's design size, #4 is a scale factor, #5 is the CMap
   1949 % encoding (currently only OT1, OT1IT and OT1TT are allowed, pass
   1950 % empty to omit).
   1951 \def\setfont#1#2#3#4#5{%
   1952   \font#1=\fontprefix#2#3 scaled #4
   1953   \csname cmap#5\endcsname#1%
   1954 }
   1955 % This is what gets called when #5 of \setfont is empty.
   1956 \let\cmap\gobble
   1957 % emacs-page end of cmaps
   1958 
   1959 % Use cm as the default font prefix.
   1960 % To specify the font prefix, you must define \fontprefix
   1961 % before you read in texinfo.tex.
   1962 \ifx\fontprefix\undefined
   1963 \def\fontprefix{cm}
   1964 \fi
   1965 % Support font families that don't use the same naming scheme as CM.
   1966 \def\rmshape{r}
   1967 \def\rmbshape{bx}               %where the normal face is bold
   1968 \def\bfshape{b}
   1969 \def\bxshape{bx}
   1970 \def\ttshape{tt}
   1971 \def\ttbshape{tt}
   1972 \def\ttslshape{sltt}
   1973 \def\itshape{ti}
   1974 \def\itbshape{bxti}
   1975 \def\slshape{sl}
   1976 \def\slbshape{bxsl}
   1977 \def\sfshape{ss}
   1978 \def\sfbshape{ss}
   1979 \def\scshape{csc}
   1980 \def\scbshape{csc}
   1981 
   1982 % Definitions for a main text size of 11pt.  This is the default in
   1983 % Texinfo.
   1984 %
   1985 \def\definetextfontsizexi{%
   1986 % Text fonts (11.2pt, magstep1).
   1987 \def\textnominalsize{11pt}
   1988 \edef\mainmagstep{\magstephalf}
   1989 \setfont\textrm\rmshape{10}{\mainmagstep}{OT1}
   1990 \setfont\texttt\ttshape{10}{\mainmagstep}{OT1TT}
   1991 \setfont\textbf\bfshape{10}{\mainmagstep}{OT1}
   1992 \setfont\textit\itshape{10}{\mainmagstep}{OT1IT}
   1993 \setfont\textsl\slshape{10}{\mainmagstep}{OT1}
   1994 \setfont\textsf\sfshape{10}{\mainmagstep}{OT1}
   1995 \setfont\textsc\scshape{10}{\mainmagstep}{OT1}
   1996 \setfont\textttsl\ttslshape{10}{\mainmagstep}{OT1TT}
   1997 \font\texti=cmmi10 scaled \mainmagstep
   1998 \font\textsy=cmsy10 scaled \mainmagstep
   1999 \def\textecsize{1095}
   2000 
   2001 % A few fonts for @defun names and args.
   2002 \setfont\defbf\bfshape{10}{\magstep1}{OT1}
   2003 \setfont\deftt\ttshape{10}{\magstep1}{OT1TT}
   2004 \setfont\defttsl\ttslshape{10}{\magstep1}{OT1TT}
   2005 \def\df{\let\tentt=\deftt \let\tenbf = \defbf \let\tenttsl=\defttsl \bf}
   2006 
   2007 % Fonts for indices, footnotes, small examples (9pt).
   2008 \def\smallnominalsize{9pt}
   2009 \setfont\smallrm\rmshape{9}{1000}{OT1}
   2010 \setfont\smalltt\ttshape{9}{1000}{OT1TT}
   2011 \setfont\smallbf\bfshape{10}{900}{OT1}
   2012 \setfont\smallit\itshape{9}{1000}{OT1IT}
   2013 \setfont\smallsl\slshape{9}{1000}{OT1}
   2014 \setfont\smallsf\sfshape{9}{1000}{OT1}
   2015 \setfont\smallsc\scshape{10}{900}{OT1}
   2016 \setfont\smallttsl\ttslshape{10}{900}{OT1TT}
   2017 \font\smalli=cmmi9
   2018 \font\smallsy=cmsy9
   2019 \def\smallecsize{0900}
   2020 
   2021 % Fonts for small examples (8pt).
   2022 \def\smallernominalsize{8pt}
   2023 \setfont\smallerrm\rmshape{8}{1000}{OT1}
   2024 \setfont\smallertt\ttshape{8}{1000}{OT1TT}
   2025 \setfont\smallerbf\bfshape{10}{800}{OT1}
   2026 \setfont\smallerit\itshape{8}{1000}{OT1IT}
   2027 \setfont\smallersl\slshape{8}{1000}{OT1}
   2028 \setfont\smallersf\sfshape{8}{1000}{OT1}
   2029 \setfont\smallersc\scshape{10}{800}{OT1}
   2030 \setfont\smallerttsl\ttslshape{10}{800}{OT1TT}
   2031 \font\smalleri=cmmi8
   2032 \font\smallersy=cmsy8
   2033 \def\smallerecsize{0800}
   2034 
   2035 % Fonts for title page (20.4pt):
   2036 \def\titlenominalsize{20pt}
   2037 \setfont\titlerm\rmbshape{12}{\magstep3}{OT1}
   2038 \setfont\titleit\itbshape{10}{\magstep4}{OT1IT}
   2039 \setfont\titlesl\slbshape{10}{\magstep4}{OT1}
   2040 \setfont\titlett\ttbshape{12}{\magstep3}{OT1TT}
   2041 \setfont\titlettsl\ttslshape{10}{\magstep4}{OT1TT}
   2042 \setfont\titlesf\sfbshape{17}{\magstep1}{OT1}
   2043 \let\titlebf=\titlerm
   2044 \setfont\titlesc\scbshape{10}{\magstep4}{OT1}
   2045 \font\titlei=cmmi12 scaled \magstep3
   2046 \font\titlesy=cmsy10 scaled \magstep4
   2047 \def\titleecsize{2074}
   2048 
   2049 % Chapter (and unnumbered) fonts (17.28pt).
   2050 \def\chapnominalsize{17pt}
   2051 \setfont\chaprm\rmbshape{12}{\magstep2}{OT1}
   2052 \setfont\chapit\itbshape{10}{\magstep3}{OT1IT}
   2053 \setfont\chapsl\slbshape{10}{\magstep3}{OT1}
   2054 \setfont\chaptt\ttbshape{12}{\magstep2}{OT1TT}
   2055 \setfont\chapttsl\ttslshape{10}{\magstep3}{OT1TT}
   2056 \setfont\chapsf\sfbshape{17}{1000}{OT1}
   2057 \let\chapbf=\chaprm
   2058 \setfont\chapsc\scbshape{10}{\magstep3}{OT1}
   2059 \font\chapi=cmmi12 scaled \magstep2
   2060 \font\chapsy=cmsy10 scaled \magstep3
   2061 \def\chapecsize{1728}
   2062 
   2063 % Section fonts (14.4pt).
   2064 \def\secnominalsize{14pt}
   2065 \setfont\secrm\rmbshape{12}{\magstep1}{OT1}
   2066 \setfont\secit\itbshape{10}{\magstep2}{OT1IT}
   2067 \setfont\secsl\slbshape{10}{\magstep2}{OT1}
   2068 \setfont\sectt\ttbshape{12}{\magstep1}{OT1TT}
   2069 \setfont\secttsl\ttslshape{10}{\magstep2}{OT1TT}
   2070 \setfont\secsf\sfbshape{12}{\magstep1}{OT1}
   2071 \let\secbf\secrm
   2072 \setfont\secsc\scbshape{10}{\magstep2}{OT1}
   2073 \font\seci=cmmi12 scaled \magstep1
   2074 \font\secsy=cmsy10 scaled \magstep2
   2075 \def\sececsize{1440}
   2076 
   2077 % Subsection fonts (13.15pt).
   2078 \def\ssecnominalsize{13pt}
   2079 \setfont\ssecrm\rmbshape{12}{\magstephalf}{OT1}
   2080 \setfont\ssecit\itbshape{10}{1315}{OT1IT}
   2081 \setfont\ssecsl\slbshape{10}{1315}{OT1}
   2082 \setfont\ssectt\ttbshape{12}{\magstephalf}{OT1TT}
   2083 \setfont\ssecttsl\ttslshape{10}{1315}{OT1TT}
   2084 \setfont\ssecsf\sfbshape{12}{\magstephalf}{OT1}
   2085 \let\ssecbf\ssecrm
   2086 \setfont\ssecsc\scbshape{10}{1315}{OT1}
   2087 \font\sseci=cmmi12 scaled \magstephalf
   2088 \font\ssecsy=cmsy10 scaled 1315
   2089 \def\ssececsize{1200}
   2090 
   2091 % Reduced fonts for @acro in text (10pt).
   2092 \def\reducednominalsize{10pt}
   2093 \setfont\reducedrm\rmshape{10}{1000}{OT1}
   2094 \setfont\reducedtt\ttshape{10}{1000}{OT1TT}
   2095 \setfont\reducedbf\bfshape{10}{1000}{OT1}
   2096 \setfont\reducedit\itshape{10}{1000}{OT1IT}
   2097 \setfont\reducedsl\slshape{10}{1000}{OT1}
   2098 \setfont\reducedsf\sfshape{10}{1000}{OT1}
   2099 \setfont\reducedsc\scshape{10}{1000}{OT1}
   2100 \setfont\reducedttsl\ttslshape{10}{1000}{OT1TT}
   2101 \font\reducedi=cmmi10
   2102 \font\reducedsy=cmsy10
   2103 \def\reducedecsize{1000}
   2104 
   2105 % reset the current fonts
   2106 \textfonts
   2107 \rm
   2108 } % end of 11pt text font size definitions
   2109 
   2110 
   2111 % Definitions to make the main text be 10pt Computer Modern, with
   2112 % section, chapter, etc., sizes following suit.  This is for the GNU
   2113 % Press printing of the Emacs 22 manual.  Maybe other manuals in the
   2114 % future.  Used with @smallbook, which sets the leading to 12pt.
   2115 %
   2116 \def\definetextfontsizex{%
   2117 % Text fonts (10pt).
   2118 \def\textnominalsize{10pt}
   2119 \edef\mainmagstep{1000}
   2120 \setfont\textrm\rmshape{10}{\mainmagstep}{OT1}
   2121 \setfont\texttt\ttshape{10}{\mainmagstep}{OT1TT}
   2122 \setfont\textbf\bfshape{10}{\mainmagstep}{OT1}
   2123 \setfont\textit\itshape{10}{\mainmagstep}{OT1IT}
   2124 \setfont\textsl\slshape{10}{\mainmagstep}{OT1}
   2125 \setfont\textsf\sfshape{10}{\mainmagstep}{OT1}
   2126 \setfont\textsc\scshape{10}{\mainmagstep}{OT1}
   2127 \setfont\textttsl\ttslshape{10}{\mainmagstep}{OT1TT}
   2128 \font\texti=cmmi10 scaled \mainmagstep
   2129 \font\textsy=cmsy10 scaled \mainmagstep
   2130 \def\textecsize{1000}
   2131 
   2132 % A few fonts for @defun names and args.
   2133 \setfont\defbf\bfshape{10}{\magstephalf}{OT1}
   2134 \setfont\deftt\ttshape{10}{\magstephalf}{OT1TT}
   2135 \setfont\defttsl\ttslshape{10}{\magstephalf}{OT1TT}
   2136 \def\df{\let\tentt=\deftt \let\tenbf = \defbf \let\tenttsl=\defttsl \bf}
   2137 
   2138 % Fonts for indices, footnotes, small examples (9pt).
   2139 \def\smallnominalsize{9pt}
   2140 \setfont\smallrm\rmshape{9}{1000}{OT1}
   2141 \setfont\smalltt\ttshape{9}{1000}{OT1TT}
   2142 \setfont\smallbf\bfshape{10}{900}{OT1}
   2143 \setfont\smallit\itshape{9}{1000}{OT1IT}
   2144 \setfont\smallsl\slshape{9}{1000}{OT1}
   2145 \setfont\smallsf\sfshape{9}{1000}{OT1}
   2146 \setfont\smallsc\scshape{10}{900}{OT1}
   2147 \setfont\smallttsl\ttslshape{10}{900}{OT1TT}
   2148 \font\smalli=cmmi9
   2149 \font\smallsy=cmsy9
   2150 \def\smallecsize{0900}
   2151 
   2152 % Fonts for small examples (8pt).
   2153 \def\smallernominalsize{8pt}
   2154 \setfont\smallerrm\rmshape{8}{1000}{OT1}
   2155 \setfont\smallertt\ttshape{8}{1000}{OT1TT}
   2156 \setfont\smallerbf\bfshape{10}{800}{OT1}
   2157 \setfont\smallerit\itshape{8}{1000}{OT1IT}
   2158 \setfont\smallersl\slshape{8}{1000}{OT1}
   2159 \setfont\smallersf\sfshape{8}{1000}{OT1}
   2160 \setfont\smallersc\scshape{10}{800}{OT1}
   2161 \setfont\smallerttsl\ttslshape{10}{800}{OT1TT}
   2162 \font\smalleri=cmmi8
   2163 \font\smallersy=cmsy8
   2164 \def\smallerecsize{0800}
   2165 
   2166 % Fonts for title page (20.4pt):
   2167 \def\titlenominalsize{20pt}
   2168 \setfont\titlerm\rmbshape{12}{\magstep3}{OT1}
   2169 \setfont\titleit\itbshape{10}{\magstep4}{OT1IT}
   2170 \setfont\titlesl\slbshape{10}{\magstep4}{OT1}
   2171 \setfont\titlett\ttbshape{12}{\magstep3}{OT1TT}
   2172 \setfont\titlettsl\ttslshape{10}{\magstep4}{OT1TT}
   2173 \setfont\titlesf\sfbshape{17}{\magstep1}{OT1}
   2174 \let\titlebf=\titlerm
   2175 \setfont\titlesc\scbshape{10}{\magstep4}{OT1}
   2176 \font\titlei=cmmi12 scaled \magstep3
   2177 \font\titlesy=cmsy10 scaled \magstep4
   2178 \def\titleecsize{2074}
   2179 
   2180 % Chapter fonts (14.4pt).
   2181 \def\chapnominalsize{14pt}
   2182 \setfont\chaprm\rmbshape{12}{\magstep1}{OT1}
   2183 \setfont\chapit\itbshape{10}{\magstep2}{OT1IT}
   2184 \setfont\chapsl\slbshape{10}{\magstep2}{OT1}
   2185 \setfont\chaptt\ttbshape{12}{\magstep1}{OT1TT}
   2186 \setfont\chapttsl\ttslshape{10}{\magstep2}{OT1TT}
   2187 \setfont\chapsf\sfbshape{12}{\magstep1}{OT1}
   2188 \let\chapbf\chaprm
   2189 \setfont\chapsc\scbshape{10}{\magstep2}{OT1}
   2190 \font\chapi=cmmi12 scaled \magstep1
   2191 \font\chapsy=cmsy10 scaled \magstep2
   2192 \def\chapecsize{1440}
   2193 
   2194 % Section fonts (12pt).
   2195 \def\secnominalsize{12pt}
   2196 \setfont\secrm\rmbshape{12}{1000}{OT1}
   2197 \setfont\secit\itbshape{10}{\magstep1}{OT1IT}
   2198 \setfont\secsl\slbshape{10}{\magstep1}{OT1}
   2199 \setfont\sectt\ttbshape{12}{1000}{OT1TT}
   2200 \setfont\secttsl\ttslshape{10}{\magstep1}{OT1TT}
   2201 \setfont\secsf\sfbshape{12}{1000}{OT1}
   2202 \let\secbf\secrm
   2203 \setfont\secsc\scbshape{10}{\magstep1}{OT1}
   2204 \font\seci=cmmi12
   2205 \font\secsy=cmsy10 scaled \magstep1
   2206 \def\sececsize{1200}
   2207 
   2208 % Subsection fonts (10pt).
   2209 \def\ssecnominalsize{10pt}
   2210 \setfont\ssecrm\rmbshape{10}{1000}{OT1}
   2211 \setfont\ssecit\itbshape{10}{1000}{OT1IT}
   2212 \setfont\ssecsl\slbshape{10}{1000}{OT1}
   2213 \setfont\ssectt\ttbshape{10}{1000}{OT1TT}
   2214 \setfont\ssecttsl\ttslshape{10}{1000}{OT1TT}
   2215 \setfont\ssecsf\sfbshape{10}{1000}{OT1}
   2216 \let\ssecbf\ssecrm
   2217 \setfont\ssecsc\scbshape{10}{1000}{OT1}
   2218 \font\sseci=cmmi10
   2219 \font\ssecsy=cmsy10
   2220 \def\ssececsize{1000}
   2221 
   2222 % Reduced fonts for @acro in text (9pt).
   2223 \def\reducednominalsize{9pt}
   2224 \setfont\reducedrm\rmshape{9}{1000}{OT1}
   2225 \setfont\reducedtt\ttshape{9}{1000}{OT1TT}
   2226 \setfont\reducedbf\bfshape{10}{900}{OT1}
   2227 \setfont\reducedit\itshape{9}{1000}{OT1IT}
   2228 \setfont\reducedsl\slshape{9}{1000}{OT1}
   2229 \setfont\reducedsf\sfshape{9}{1000}{OT1}
   2230 \setfont\reducedsc\scshape{10}{900}{OT1}
   2231 \setfont\reducedttsl\ttslshape{10}{900}{OT1TT}
   2232 \font\reducedi=cmmi9
   2233 \font\reducedsy=cmsy9
   2234 \def\reducedecsize{0900}
   2235 
   2236 % reduce space between paragraphs
   2237 \divide\parskip by 2
   2238 
   2239 % reset the current fonts
   2240 \textfonts
   2241 \rm
   2242 } % end of 10pt text font size definitions
   2243 
   2244 
   2245 % We provide the user-level command
   2246 %   @fonttextsize 10
   2247 % (or 11) to redefine the text font size.  pt is assumed.
   2248 %
   2249 \def\xword{10}
   2250 \def\xiword{11}
   2251 %
   2252 \parseargdef\fonttextsize{%
   2253   \def\textsizearg{#1}%
   2254   \wlog{doing @fonttextsize \textsizearg}%
   2255   %
   2256   % Set \globaldefs so that documents can use this inside @tex, since
   2257   % makeinfo 4.8 does not support it, but we need it nonetheless.
   2258   %
   2259  \begingroup \globaldefs=1
   2260   \ifx\textsizearg\xword \definetextfontsizex
   2261   \else \ifx\textsizearg\xiword \definetextfontsizexi
   2262   \else
   2263     \errhelp=\EMsimple
   2264     \errmessage{@fonttextsize only supports `10' or `11', not `\textsizearg'}
   2265   \fi\fi
   2266  \endgroup
   2267 }
   2268 
   2269 
   2270 % In order for the font changes to affect most math symbols and letters,
   2271 % we have to define the \textfont of the standard families.  Since
   2272 % texinfo doesn't allow for producing subscripts and superscripts except
   2273 % in the main text, we don't bother to reset \scriptfont and
   2274 % \scriptscriptfont (which would also require loading a lot more fonts).
   2275 %
   2276 \def\resetmathfonts{%
   2277   \textfont0=\tenrm \textfont1=\teni \textfont2=\tensy
   2278   \textfont\itfam=\tenit \textfont\slfam=\tensl \textfont\bffam=\tenbf
   2279   \textfont\ttfam=\tentt \textfont\sffam=\tensf
   2280 }
   2281 
   2282 % The font-changing commands redefine the meanings of \tenSTYLE, instead
   2283 % of just \STYLE.  We do this because \STYLE needs to also set the
   2284 % current \fam for math mode.  Our \STYLE (e.g., \rm) commands hardwire
   2285 % \tenSTYLE to set the current font.
   2286 %
   2287 % Each font-changing command also sets the names \lsize (one size lower)
   2288 % and \lllsize (three sizes lower).  These relative commands are used in
   2289 % the LaTeX logo and acronyms.
   2290 %
   2291 % This all needs generalizing, badly.
   2292 %
   2293 \def\textfonts{%
   2294   \let\tenrm=\textrm \let\tenit=\textit \let\tensl=\textsl
   2295   \let\tenbf=\textbf \let\tentt=\texttt \let\smallcaps=\textsc
   2296   \let\tensf=\textsf \let\teni=\texti \let\tensy=\textsy
   2297   \let\tenttsl=\textttsl
   2298   \def\curfontsize{text}%
   2299   \def\lsize{reduced}\def\lllsize{smaller}%
   2300   \resetmathfonts \setleading{\textleading}}
   2301 \def\titlefonts{%
   2302   \let\tenrm=\titlerm \let\tenit=\titleit \let\tensl=\titlesl
   2303   \let\tenbf=\titlebf \let\tentt=\titlett \let\smallcaps=\titlesc
   2304   \let\tensf=\titlesf \let\teni=\titlei \let\tensy=\titlesy
   2305   \let\tenttsl=\titlettsl
   2306   \def\curfontsize{title}%
   2307   \def\lsize{chap}\def\lllsize{subsec}%
   2308   \resetmathfonts \setleading{25pt}}
   2309 \def\titlefont#1{{\titlefonts\rmisbold #1}}
   2310 \def\chapfonts{%
   2311   \let\tenrm=\chaprm \let\tenit=\chapit \let\tensl=\chapsl
   2312   \let\tenbf=\chapbf \let\tentt=\chaptt \let\smallcaps=\chapsc
   2313   \let\tensf=\chapsf \let\teni=\chapi \let\tensy=\chapsy
   2314   \let\tenttsl=\chapttsl
   2315   \def\curfontsize{chap}%
   2316   \def\lsize{sec}\def\lllsize{text}%
   2317   \resetmathfonts \setleading{19pt}}
   2318 \def\secfonts{%
   2319   \let\tenrm=\secrm \let\tenit=\secit \let\tensl=\secsl
   2320   \let\tenbf=\secbf \let\tentt=\sectt \let\smallcaps=\secsc
   2321   \let\tensf=\secsf \let\teni=\seci \let\tensy=\secsy
   2322   \let\tenttsl=\secttsl
   2323   \def\curfontsize{sec}%
   2324   \def\lsize{subsec}\def\lllsize{reduced}%
   2325   \resetmathfonts \setleading{16pt}}
   2326 \def\subsecfonts{%
   2327   \let\tenrm=\ssecrm \let\tenit=\ssecit \let\tensl=\ssecsl
   2328   \let\tenbf=\ssecbf \let\tentt=\ssectt \let\smallcaps=\ssecsc
   2329   \let\tensf=\ssecsf \let\teni=\sseci \let\tensy=\ssecsy
   2330   \let\tenttsl=\ssecttsl
   2331   \def\curfontsize{ssec}%
   2332   \def\lsize{text}\def\lllsize{small}%
   2333   \resetmathfonts \setleading{15pt}}
   2334 \let\subsubsecfonts = \subsecfonts
   2335 \def\reducedfonts{%
   2336   \let\tenrm=\reducedrm \let\tenit=\reducedit \let\tensl=\reducedsl
   2337   \let\tenbf=\reducedbf \let\tentt=\reducedtt \let\reducedcaps=\reducedsc
   2338   \let\tensf=\reducedsf \let\teni=\reducedi \let\tensy=\reducedsy
   2339   \let\tenttsl=\reducedttsl
   2340   \def\curfontsize{reduced}%
   2341   \def\lsize{small}\def\lllsize{smaller}%
   2342   \resetmathfonts \setleading{10.5pt}}
   2343 \def\smallfonts{%
   2344   \let\tenrm=\smallrm \let\tenit=\smallit \let\tensl=\smallsl
   2345   \let\tenbf=\smallbf \let\tentt=\smalltt \let\smallcaps=\smallsc
   2346   \let\tensf=\smallsf \let\teni=\smalli \let\tensy=\smallsy
   2347   \let\tenttsl=\smallttsl
   2348   \def\curfontsize{small}%
   2349   \def\lsize{smaller}\def\lllsize{smaller}%
   2350   \resetmathfonts \setleading{10.5pt}}
   2351 \def\smallerfonts{%
   2352   \let\tenrm=\smallerrm \let\tenit=\smallerit \let\tensl=\smallersl
   2353   \let\tenbf=\smallerbf \let\tentt=\smallertt \let\smallcaps=\smallersc
   2354   \let\tensf=\smallersf \let\teni=\smalleri \let\tensy=\smallersy
   2355   \let\tenttsl=\smallerttsl
   2356   \def\curfontsize{smaller}%
   2357   \def\lsize{smaller}\def\lllsize{smaller}%
   2358   \resetmathfonts \setleading{9.5pt}}
   2359 
   2360 % Fonts for short table of contents.
   2361 \setfont\shortcontrm\rmshape{12}{1000}{OT1}
   2362 \setfont\shortcontbf\bfshape{10}{\magstep1}{OT1}  % no cmb12
   2363 \setfont\shortcontsl\slshape{12}{1000}{OT1}
   2364 \setfont\shortconttt\ttshape{12}{1000}{OT1TT}
   2365 
   2366 % Define these just so they can be easily changed for other fonts.
   2367 \def\angleleft{$\langle$}
   2368 \def\angleright{$\rangle$}
   2369 
   2370 % Set the fonts to use with the @small... environments.
   2371 \let\smallexamplefonts = \smallfonts
   2372 
   2373 % About \smallexamplefonts.  If we use \smallfonts (9pt), @smallexample
   2374 % can fit this many characters:
   2375 %   8.5x11=86   smallbook=72  a4=90  a5=69
   2376 % If we use \scriptfonts (8pt), then we can fit this many characters:
   2377 %   8.5x11=90+  smallbook=80  a4=90+  a5=77
   2378 % For me, subjectively, the few extra characters that fit aren't worth
   2379 % the additional smallness of 8pt.  So I'm making the default 9pt.
   2380 %
   2381 % By the way, for comparison, here's what fits with @example (10pt):
   2382 %   8.5x11=71  smallbook=60  a4=75  a5=58
   2383 % --karl, 24jan03.
   2384 
   2385 % Set up the default fonts, so we can use them for creating boxes.
   2386 %
   2387 \definetextfontsizexi
   2388 
   2389 
   2390 \message{markup,}
   2391 
   2392 % Check if we are currently using a typewriter font.  Since all the
   2393 % Computer Modern typewriter fonts have zero interword stretch (and
   2394 % shrink), and it is reasonable to expect all typewriter fonts to have
   2395 % this property, we can check that font parameter.
   2396 %
   2397 \def\ifmonospace{\ifdim\fontdimen3\font=0pt }
   2398 
   2399 % Markup style infrastructure.  \defmarkupstylesetup\INITMACRO will
   2400 % define and register \INITMACRO to be called on markup style changes.
   2401 % \INITMACRO can check \currentmarkupstyle for the innermost
   2402 % style and the set of \ifmarkupSTYLE switches for all styles
   2403 % currently in effect.
   2404 \newif\ifmarkupvar
   2405 \newif\ifmarkupsamp
   2406 \newif\ifmarkupkey
   2407 %\newif\ifmarkupfile % @file == @samp.
   2408 %\newif\ifmarkupoption % @option == @samp.
   2409 \newif\ifmarkupcode
   2410 \newif\ifmarkupkbd
   2411 %\newif\ifmarkupenv % @env == @code.
   2412 %\newif\ifmarkupcommand % @command == @code.
   2413 \newif\ifmarkuptex % @tex (and part of @math, for now).
   2414 \newif\ifmarkupexample
   2415 \newif\ifmarkupverb
   2416 \newif\ifmarkupverbatim
   2417 
   2418 \let\currentmarkupstyle\empty
   2419 
   2420 \def\setupmarkupstyle#1{%
   2421   \csname markup#1true\endcsname
   2422   \def\currentmarkupstyle{#1}%
   2423   \markupstylesetup
   2424 }
   2425 
   2426 \let\markupstylesetup\empty
   2427 
   2428 \def\defmarkupstylesetup#1{%
   2429   \expandafter\def\expandafter\markupstylesetup
   2430     \expandafter{\markupstylesetup #1}%
   2431   \def#1%
   2432 }
   2433 
   2434 % Markup style setup for left and right quotes.
   2435 \defmarkupstylesetup\markupsetuplq{%
   2436   \expandafter\let\expandafter \temp \csname markupsetuplq\currentmarkupstyle\endcsname
   2437   \ifx\temp\relax \markupsetuplqdefault \else \temp \fi
   2438 }
   2439 
   2440 \defmarkupstylesetup\markupsetuprq{%
   2441   \expandafter\let\expandafter \temp \csname markupsetuprq\currentmarkupstyle\endcsname
   2442   \ifx\temp\relax \markupsetuprqdefault \else \temp \fi
   2443 }
   2444 
   2445 {
   2446 \catcode`\'=\active
   2447 \catcode`\`=\active
   2448 
   2449 \gdef\markupsetuplqdefault{\let`\lq}
   2450 \gdef\markupsetuprqdefault{\let'\rq}
   2451 
   2452 \gdef\markupsetcodequoteleft{\let`\codequoteleft}
   2453 \gdef\markupsetcodequoteright{\let'\codequoteright}
   2454 
   2455 \gdef\markupsetnoligaturesquoteleft{\let`\noligaturesquoteleft}
   2456 }
   2457 
   2458 \let\markupsetuplqcode \markupsetcodequoteleft
   2459 \let\markupsetuprqcode \markupsetcodequoteright
   2460 \let\markupsetuplqexample \markupsetcodequoteleft
   2461 \let\markupsetuprqexample \markupsetcodequoteright
   2462 \let\markupsetuplqverb \markupsetcodequoteleft
   2463 \let\markupsetuprqverb \markupsetcodequoteright
   2464 \let\markupsetuplqverbatim \markupsetcodequoteleft
   2465 \let\markupsetuprqverbatim \markupsetcodequoteright
   2466 
   2467 \let\markupsetuplqsamp \markupsetnoligaturesquoteleft
   2468 \let\markupsetuplqkbd \markupsetnoligaturesquoteleft
   2469 
   2470 % Allow an option to not replace quotes with a regular directed right
   2471 % quote/apostrophe (char 0x27), but instead use the undirected quote
   2472 % from cmtt (char 0x0d).  The undirected quote is ugly, so don't make it
   2473 % the default, but it works for pasting with more pdf viewers (at least
   2474 % evince), the lilypond developers report.  xpdf does work with the
   2475 % regular 0x27.
   2476 %
   2477 \def\codequoteright{%
   2478   \expandafter\ifx\csname SETtxicodequoteundirected\endcsname\relax
   2479     \expandafter\ifx\csname SETcodequoteundirected\endcsname\relax
   2480       '%
   2481     \else \char'15 \fi
   2482   \else \char'15 \fi
   2483 }
   2484 %
   2485 % and a similar option for the left quote char vs. a grave accent.
   2486 % Modern fonts display ASCII 0x60 as a grave accent, so some people like
   2487 % the code environments to do likewise.
   2488 %
   2489 \def\codequoteleft{%
   2490   \expandafter\ifx\csname SETtxicodequotebacktick\endcsname\relax
   2491     \expandafter\ifx\csname SETcodequotebacktick\endcsname\relax
   2492       % [Knuth] pp. 380,381,391
   2493       % \relax disables Spanish ligatures ?` and !` of \tt font.
   2494       \relax`%
   2495     \else \char'22 \fi
   2496   \else \char'22 \fi
   2497 }
   2498 
   2499 % [Knuth] pp. 380,381,391, disable Spanish ligatures ?` and !` of \tt font.
   2500 \def\noligaturesquoteleft{\relax\lq}
   2501 
   2502 % Count depth in font-changes, for error checks
   2503 \newcount\fontdepth \fontdepth=0
   2504 
   2505 %% Add scribe-like font environments, plus @l for inline lisp (usually sans
   2506 %% serif) and @ii for TeX italic
   2507 
   2508 % \smartitalic{ARG} outputs arg in italics, followed by an italic correction
   2509 % unless the following character is such as not to need one.
   2510 \def\smartitalicx{\ifx\next,\else\ifx\next-\else\ifx\next.\else
   2511                     \ptexslash\fi\fi\fi}
   2512 \def\smartslanted#1{{\ifusingtt\ttsl\sl #1}\futurelet\next\smartitalicx}
   2513 \def\smartitalic#1{{\ifusingtt\ttsl\it #1}\futurelet\next\smartitalicx}
   2514 
   2515 % like \smartslanted except unconditionally uses \ttsl.
   2516 % @var is set to this for defun arguments.
   2517 \def\ttslanted#1{{\ttsl #1}\futurelet\next\smartitalicx}
   2518 
   2519 % @cite is like \smartslanted except unconditionally use \sl.  We never want
   2520 % ttsl for book titles, do we?
   2521 \def\cite#1{{\sl #1}\futurelet\next\smartitalicx}
   2522 
   2523 \let\i=\smartitalic
   2524 \let\slanted=\smartslanted
   2525 \def\var#1{{\setupmarkupstyle{var}\smartslanted{#1}}}
   2526 \let\dfn=\smartslanted
   2527 \let\emph=\smartitalic
   2528 
   2529 % Explicit font changes: @r, @sc, undocumented @ii.
   2530 \def\r#1{{\rm #1}}              % roman font
   2531 \def\sc#1{{\smallcaps#1}}       % smallcaps font
   2532 \def\ii#1{{\it #1}}             % italic font
   2533 
   2534 % @b, explicit bold.  Also @strong.
   2535 \def\b#1{{\bf #1}}
   2536 \let\strong=\b
   2537 
   2538 % @sansserif, explicit sans.
   2539 \def\sansserif#1{{\sf #1}}
   2540 
   2541 % We can't just use \exhyphenpenalty, because that only has effect at
   2542 % the end of a paragraph.  Restore normal hyphenation at the end of the
   2543 % group within which \nohyphenation is presumably called.
   2544 %
   2545 \def\nohyphenation{\hyphenchar\font = -1  \aftergroup\restorehyphenation}
   2546 \def\restorehyphenation{\hyphenchar\font = `- }
   2547 
   2548 % Set sfcode to normal for the chars that usually have another value.
   2549 % Can't use plain's \frenchspacing because it uses the `\x notation, and
   2550 % sometimes \x has an active definition that messes things up.
   2551 %
   2552 \catcode`@=11
   2553   \def\plainfrenchspacing{%
   2554     \sfcode\dotChar  =\@m \sfcode\questChar=\@m \sfcode\exclamChar=\@m
   2555     \sfcode\colonChar=\@m \sfcode\semiChar =\@m \sfcode\commaChar =\@m
   2556     \def\endofsentencespacefactor{1000}% for @. and friends
   2557   }
   2558   \def\plainnonfrenchspacing{%
   2559     \sfcode`\.3000\sfcode`\?3000\sfcode`\!3000
   2560     \sfcode`\:2000\sfcode`\;1500\sfcode`\,1250
   2561     \def\endofsentencespacefactor{3000}% for @. and friends
   2562   }
   2563 \catcode`@=\other
   2564 \def\endofsentencespacefactor{3000}% default
   2565 
   2566 % @t, explicit typewriter.
   2567 \def\t#1{%
   2568   {\tt \rawbackslash \plainfrenchspacing #1}%
   2569   \null
   2570 }
   2571 
   2572 % @samp.
   2573 \def\samp#1{{\setupmarkupstyle{samp}\lq\tclose{#1}\rq\null}}
   2574 
   2575 % definition of @key that produces a lozenge.  Doesn't adjust to text size.
   2576 %\setfont\keyrm\rmshape{8}{1000}{OT1}
   2577 %\font\keysy=cmsy9
   2578 %\def\key#1{{\keyrm\textfont2=\keysy \leavevmode\hbox{%
   2579 %  \raise0.4pt\hbox{\angleleft}\kern-.08em\vtop{%
   2580 %    \vbox{\hrule\kern-0.4pt
   2581 %     \hbox{\raise0.4pt\hbox{\vphantom{\angleleft}}#1}}%
   2582 %    \kern-0.4pt\hrule}%
   2583 %  \kern-.06em\raise0.4pt\hbox{\angleright}}}}
   2584 
   2585 % definition of @key with no lozenge.  If the current font is already
   2586 % monospace, don't change it; that way, we respect @kbdinputstyle.  But
   2587 % if it isn't monospace, then use \tt.
   2588 %
   2589 \def\key#1{{\setupmarkupstyle{key}%
   2590   \nohyphenation
   2591   \ifmonospace\else\tt\fi
   2592   #1}\null}
   2593 
   2594 % ctrl is no longer a Texinfo command.
   2595 \def\ctrl #1{{\tt \rawbackslash \hat}#1}
   2596 
   2597 % @file, @option are the same as @samp.
   2598 \let\file=\samp
   2599 \let\option=\samp
   2600 
   2601 % @code is a modification of @t,
   2602 % which makes spaces the same size as normal in the surrounding text.
   2603 \def\tclose#1{%
   2604   {%
   2605     % Change normal interword space to be same as for the current font.
   2606     \spaceskip = \fontdimen2\font
   2607     %
   2608     % Switch to typewriter.
   2609     \tt
   2610     %
   2611     % But `\ ' produces the large typewriter interword space.
   2612     \def\ {{\spaceskip = 0pt{} }}%
   2613     %
   2614     % Turn off hyphenation.
   2615     \nohyphenation
   2616     %
   2617     \rawbackslash
   2618     \plainfrenchspacing
   2619     #1%
   2620   }%
   2621   \null
   2622 }
   2623 
   2624 % We *must* turn on hyphenation at `-' and `_' in @code.
   2625 % Otherwise, it is too hard to avoid overfull hboxes
   2626 % in the Emacs manual, the Library manual, etc.
   2627 
   2628 % Unfortunately, TeX uses one parameter (\hyphenchar) to control
   2629 % both hyphenation at - and hyphenation within words.
   2630 % We must therefore turn them both off (\tclose does that)
   2631 % and arrange explicitly to hyphenate at a dash.
   2632 %  -- rms.
   2633 {
   2634   \catcode`\-=\active \catcode`\_=\active
   2635   \catcode`\'=\active \catcode`\`=\active
   2636   \global\let'=\rq \global\let`=\lq  % default definitions
   2637   %
   2638   \global\def\code{\begingroup
   2639     \setupmarkupstyle{code}%
   2640     % The following should really be moved into \setupmarkupstyle handlers.
   2641     \catcode\dashChar=\active  \catcode\underChar=\active
   2642     \ifallowcodebreaks
   2643      \let-\codedash
   2644      \let_\codeunder
   2645     \else
   2646      \let-\realdash
   2647      \let_\realunder
   2648     \fi
   2649     \codex
   2650   }
   2651 }
   2652 
   2653 \def\realdash{-}
   2654 \def\codedash{-\discretionary{}{}{}}
   2655 \def\codeunder{%
   2656   % this is all so @math{@code{var_name}+1} can work.  In math mode, _
   2657   % is "active" (mathcode"8000) and \normalunderscore (or \char95, etc.)
   2658   % will therefore expand the active definition of _, which is us
   2659   % (inside @code that is), therefore an endless loop.
   2660   \ifusingtt{\ifmmode
   2661                \mathchar"075F % class 0=ordinary, family 7=ttfam, pos 0x5F=_.
   2662              \else\normalunderscore \fi
   2663              \discretionary{}{}{}}%
   2664             {\_}%
   2665 }
   2666 \def\codex #1{\tclose{#1}\endgroup}
   2667 
   2668 % An additional complication: the above will allow breaks after, e.g.,
   2669 % each of the four underscores in __typeof__.  This is undesirable in
   2670 % some manuals, especially if they don't have long identifiers in
   2671 % general.  @allowcodebreaks provides a way to control this.
   2672 %
   2673 \newif\ifallowcodebreaks  \allowcodebreakstrue
   2674 
   2675 \def\keywordtrue{true}
   2676 \def\keywordfalse{false}
   2677 
   2678 \parseargdef\allowcodebreaks{%
   2679   \def\txiarg{#1}%
   2680   \ifx\txiarg\keywordtrue
   2681     \allowcodebreakstrue
   2682   \else\ifx\txiarg\keywordfalse
   2683     \allowcodebreaksfalse
   2684   \else
   2685     \errhelp = \EMsimple
   2686     \errmessage{Unknown @allowcodebreaks option `\txiarg'}%
   2687   \fi\fi
   2688 }
   2689 
   2690 % @kbd is like @code, except that if the argument is just one @key command,
   2691 % then @kbd has no effect.
   2692 \def\kbd#1{{\setupmarkupstyle{kbd}\def\look{#1}\expandafter\kbdfoo\look??\par}}
   2693 
   2694 % @kbdinputstyle -- arg is `distinct' (@kbd uses slanted tty font always),
   2695 %   `example' (@kbd uses ttsl only inside of @example and friends),
   2696 %   or `code' (@kbd uses normal tty font always).
   2697 \parseargdef\kbdinputstyle{%
   2698   \def\txiarg{#1}%
   2699   \ifx\txiarg\worddistinct
   2700     \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\ttsl}%
   2701   \else\ifx\txiarg\wordexample
   2702     \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\tt}%
   2703   \else\ifx\txiarg\wordcode
   2704     \gdef\kbdexamplefont{\tt}\gdef\kbdfont{\tt}%
   2705   \else
   2706     \errhelp = \EMsimple
   2707     \errmessage{Unknown @kbdinputstyle option `\txiarg'}%
   2708   \fi\fi\fi
   2709 }
   2710 \def\worddistinct{distinct}
   2711 \def\wordexample{example}
   2712 \def\wordcode{code}
   2713 
   2714 % Default is `distinct'.
   2715 \kbdinputstyle distinct
   2716 
   2717 \def\xkey{\key}
   2718 \def\kbdfoo#1#2#3\par{\def\one{#1}\def\three{#3}\def\threex{??}%
   2719 \ifx\one\xkey\ifx\threex\three \key{#2}%
   2720 \else{\tclose{\kbdfont\setupmarkupstyle{kbd}\look}}\fi
   2721 \else{\tclose{\kbdfont\setupmarkupstyle{kbd}\look}}\fi}
   2722 
   2723 % For @indicateurl, @env, @command quotes seem unnecessary, so use \code.
   2724 \let\indicateurl=\code
   2725 \let\env=\code
   2726 \let\command=\code
   2727 
   2728 % @clicksequence{File @click{} Open ...}
   2729 \def\clicksequence#1{\begingroup #1\endgroup}
   2730 
   2731 % @clickstyle @arrow   (by default)
   2732 \parseargdef\clickstyle{\def\click{#1}}
   2733 \def\click{\arrow}
   2734 
   2735 % @uref (abbreviation for `urlref') takes an optional (comma-separated)
   2736 % second argument specifying the text to display and an optional third
   2737 % arg as text to display instead of (rather than in addition to) the url
   2738 % itself.  First (mandatory) arg is the url.  Perhaps eventually put in
   2739 % a hypertex \special here.
   2740 %
   2741 \def\uref#1{\douref #1,,,\finish}
   2742 \def\douref#1,#2,#3,#4\finish{\begingroup
   2743   \unsepspaces
   2744   \pdfurl{#1}%
   2745   \setbox0 = \hbox{\ignorespaces #3}%
   2746   \ifdim\wd0 > 0pt
   2747     \unhbox0 % third arg given, show only that
   2748   \else
   2749     \setbox0 = \hbox{\ignorespaces #2}%
   2750     \ifdim\wd0 > 0pt
   2751       \ifpdf
   2752         \unhbox0             % PDF: 2nd arg given, show only it
   2753       \else
   2754         \unhbox0\ (\code{#1})% DVI: 2nd arg given, show both it and url
   2755       \fi
   2756     \else
   2757       \code{#1}% only url given, so show it
   2758     \fi
   2759   \fi
   2760   \endlink
   2761 \endgroup}
   2762 
   2763 % @url synonym for @uref, since that's how everyone uses it.
   2764 %
   2765 \let\url=\uref
   2766 
   2767 % rms does not like angle brackets --karl, 17may97.
   2768 % So now @email is just like @uref, unless we are pdf.
   2769 %
   2770 %\def\email#1{\angleleft{\tt #1}\angleright}
   2771 \ifpdf
   2772   \def\email#1{\doemail#1,,\finish}
   2773   \def\doemail#1,#2,#3\finish{\begingroup
   2774     \unsepspaces
   2775     \pdfurl{mailto:#1}%
   2776     \setbox0 = \hbox{\ignorespaces #2}%
   2777     \ifdim\wd0>0pt\unhbox0\else\code{#1}\fi
   2778     \endlink
   2779   \endgroup}
   2780 \else
   2781   \let\email=\uref
   2782 \fi
   2783 
   2784 % Typeset a dimension, e.g., `in' or `pt'.  The only reason for the
   2785 % argument is to make the input look right: @dmn{pt} instead of @dmn{}pt.
   2786 %
   2787 \def\dmn#1{\thinspace #1}
   2788 
   2789 % @l was never documented to mean ``switch to the Lisp font'',
   2790 % and it is not used as such in any manual I can find.  We need it for
   2791 % Polish suppressed-l.  --karl, 22sep96.
   2792 %\def\l#1{{\li #1}\null}
   2793 
   2794 % @acronym for "FBI", "NATO", and the like.
   2795 % We print this one point size smaller, since it's intended for
   2796 % all-uppercase.
   2797 %
   2798 \def\acronym#1{\doacronym #1,,\finish}
   2799 \def\doacronym#1,#2,#3\finish{%
   2800   {\selectfonts\lsize #1}%
   2801   \def\temp{#2}%
   2802   \ifx\temp\empty \else
   2803     \space ({\unsepspaces \ignorespaces \temp \unskip})%
   2804   \fi
   2805 }
   2806 
   2807 % @abbr for "Comput. J." and the like.
   2808 % No font change, but don't do end-of-sentence spacing.
   2809 %
   2810 \def\abbr#1{\doabbr #1,,\finish}
   2811 \def\doabbr#1,#2,#3\finish{%
   2812   {\plainfrenchspacing #1}%
   2813   \def\temp{#2}%
   2814   \ifx\temp\empty \else
   2815     \space ({\unsepspaces \ignorespaces \temp \unskip})%
   2816   \fi
   2817 }
   2818 
   2819 
   2820 \message{glyphs,}
   2821 
   2822 % @point{}, @result{}, @expansion{}, @print{}, @equiv{}.
   2823 %
   2824 % Since these characters are used in examples, they should be an even number of
   2825 % \tt widths. Each \tt character is 1en, so two makes it 1em.
   2826 %
   2827 \def\point{$\star$}
   2828 \def\arrow{\leavevmode\raise.05ex\hbox to 1em{\hfil$\rightarrow$\hfil}}
   2829 \def\result{\leavevmode\raise.05ex\hbox to 1em{\hfil$\Rightarrow$\hfil}}
   2830 \def\expansion{\leavevmode\hbox to 1em{\hfil$\mapsto$\hfil}}
   2831 \def\print{\leavevmode\lower.1ex\hbox to 1em{\hfil$\dashv$\hfil}}
   2832 \def\equiv{\leavevmode\hbox to 1em{\hfil$\ptexequiv$\hfil}}
   2833 
   2834 % The @error{} command.
   2835 % Adapted from the TeXbook's \boxit.
   2836 %
   2837 \newbox\errorbox
   2838 %
   2839 {\tentt \global\dimen0 = 3em}% Width of the box.
   2840 \dimen2 = .55pt % Thickness of rules
   2841 % The text. (`r' is open on the right, `e' somewhat less so on the left.)
   2842 \setbox0 = \hbox{\kern-.75pt \reducedsf error\kern-1.5pt}
   2843 %
   2844 \setbox\errorbox=\hbox to \dimen0{\hfil
   2845    \hsize = \dimen0 \advance\hsize by -5.8pt % Space to left+right.
   2846    \advance\hsize by -2\dimen2 % Rules.
   2847    \vbox{%
   2848       \hrule height\dimen2
   2849       \hbox{\vrule width\dimen2 \kern3pt          % Space to left of text.
   2850          \vtop{\kern2.4pt \box0 \kern2.4pt}% Space above/below.
   2851          \kern3pt\vrule width\dimen2}% Space to right.
   2852       \hrule height\dimen2}
   2853     \hfil}
   2854 %
   2855 \def\error{\leavevmode\lower.7ex\copy\errorbox}
   2856 
   2857 % @pounds{} is a sterling sign, which Knuth put in the CM italic font.
   2858 %
   2859 \def\pounds{{\it\$}}
   2860 
   2861 % @euro{} comes from a separate font, depending on the current style.
   2862 % We use the free feym* fonts from the eurosym package by Henrik
   2863 % Theiling, which support regular, slanted, bold and bold slanted (and
   2864 % "outlined" (blackboard board, sort of) versions, which we don't need).
   2865 % It is available from http://www.ctan.org/tex-archive/fonts/eurosym.
   2866 %
   2867 % Although only regular is the truly official Euro symbol, we ignore
   2868 % that.  The Euro is designed to be slightly taller than the regular
   2869 % font height.
   2870 %
   2871 % feymr - regular
   2872 % feymo - slanted
   2873 % feybr - bold
   2874 % feybo - bold slanted
   2875 %
   2876 % There is no good (free) typewriter version, to my knowledge.
   2877 % A feymr10 euro is ~7.3pt wide, while a normal cmtt10 char is ~5.25pt wide.
   2878 % Hmm.
   2879 %
   2880 % Also doesn't work in math.  Do we need to do math with euro symbols?
   2881 % Hope not.
   2882 %
   2883 %
   2884 \def\euro{{\eurofont e}}
   2885 \def\eurofont{%
   2886   % We set the font at each command, rather than predefining it in
   2887   % \textfonts and the other font-switching commands, so that
   2888   % installations which never need the symbol don't have to have the
   2889   % font installed.
   2890   %
   2891   % There is only one designed size (nominal 10pt), so we always scale
   2892   % that to the current nominal size.
   2893   %
   2894   % By the way, simply using "at 1em" works for cmr10 and the like, but
   2895   % does not work for cmbx10 and other extended/shrunken fonts.
   2896   %
   2897   \def\eurosize{\csname\curfontsize nominalsize\endcsname}%
   2898   %
   2899   \ifx\curfontstyle\bfstylename
   2900     % bold:
   2901     \font\thiseurofont = \ifusingit{feybo10}{feybr10} at \eurosize
   2902   \else
   2903     % regular:
   2904     \font\thiseurofont = \ifusingit{feymo10}{feymr10} at \eurosize
   2905   \fi
   2906   \thiseurofont
   2907 }
   2908 
   2909 % Glyphs from the EC fonts.  We don't use \let for the aliases, because
   2910 % sometimes we redefine the original macro, and the alias should reflect
   2911 % the redefinition.
   2912 %
   2913 % Use LaTeX names for the Icelandic letters.
   2914 \def\DH{{\ecfont \char"D0}} % Eth
   2915 \def\dh{{\ecfont \char"F0}} % eth
   2916 \def\TH{{\ecfont \char"DE}} % Thorn
   2917 \def\th{{\ecfont \char"FE}} % thorn
   2918 %
   2919 \def\guillemetleft{{\ecfont \char"13}}
   2920 \def\guillemotleft{\guillemetleft}
   2921 \def\guillemetright{{\ecfont \char"14}}
   2922 \def\guillemotright{\guillemetright}
   2923 \def\guilsinglleft{{\ecfont \char"0E}}
   2924 \def\guilsinglright{{\ecfont \char"0F}}
   2925 \def\quotedblbase{{\ecfont \char"12}}
   2926 \def\quotesinglbase{{\ecfont \char"0D}}
   2927 %
   2928 % This positioning is not perfect (see the ogonek LaTeX package), but
   2929 % we have the precomposed glyphs for the most common cases.  We put the
   2930 % tests to use those glyphs in the single \ogonek macro so we have fewer
   2931 % dummy definitions to worry about for index entries, etc.
   2932 %
   2933 % ogonek is also used with other letters in Lithuanian (IOU), but using
   2934 % the precomposed glyphs for those is not so easy since they aren't in
   2935 % the same EC font.
   2936 \def\ogonek#1{{%
   2937   \def\temp{#1}%
   2938   \ifx\temp\macrocharA\Aogonek
   2939   \else\ifx\temp\macrochara\aogonek
   2940   \else\ifx\temp\macrocharE\Eogonek
   2941   \else\ifx\temp\macrochare\eogonek
   2942   \else
   2943     \ecfont \setbox0=\hbox{#1}%
   2944     \ifdim\ht0=1ex\accent"0C #1%
   2945     \else\ooalign{\unhbox0\crcr\hidewidth\char"0C \hidewidth}%
   2946     \fi
   2947   \fi\fi\fi\fi
   2948   }%
   2949 }
   2950 \def\Aogonek{{\ecfont \char"81}}\def\macrocharA{A}
   2951 \def\aogonek{{\ecfont \char"A1}}\def\macrochara{a}
   2952 \def\Eogonek{{\ecfont \char"86}}\def\macrocharE{E}
   2953 \def\eogonek{{\ecfont \char"A6}}\def\macrochare{e}
   2954 %
   2955 % Use the ec* fonts (cm-super in outline format) for non-CM glyphs.
   2956 \def\ecfont{%
   2957   % We can't distinguish serif/sans and italic/slanted, but this
   2958   % is used for crude hacks anyway (like adding French and German
   2959   % quotes to documents typeset with CM, where we lose kerning), so
   2960   % hopefully nobody will notice/care.
   2961   \edef\ecsize{\csname\curfontsize ecsize\endcsname}%
   2962   \edef\nominalsize{\csname\curfontsize nominalsize\endcsname}%
   2963   \ifx\curfontstyle\bfstylename
   2964     % bold:
   2965     \font\thisecfont = ecb\ifusingit{i}{x}\ecsize \space at \nominalsize
   2966   \else
   2967     % regular:
   2968     \font\thisecfont = ec\ifusingit{ti}{rm}\ecsize \space at \nominalsize
   2969   \fi
   2970   \thisecfont
   2971 }
   2972 
   2973 % @registeredsymbol - R in a circle.  The font for the R should really
   2974 % be smaller yet, but lllsize is the best we can do for now.
   2975 % Adapted from the plain.tex definition of \copyright.
   2976 %
   2977 \def\registeredsymbol{%
   2978   $^{{\ooalign{\hfil\raise.07ex\hbox{\selectfonts\lllsize R}%
   2979                \hfil\crcr\Orb}}%
   2980     }$%
   2981 }
   2982 
   2983 % @textdegree - the normal degrees sign.
   2984 %
   2985 \def\textdegree{$^\circ$}
   2986 
   2987 % Laurent Siebenmann reports \Orb undefined with:
   2988 %  Textures 1.7.7 (preloaded format=plain 93.10.14)  (68K)  16 APR 2004 02:38
   2989 % so we'll define it if necessary.
   2990 %
   2991 \ifx\Orb\undefined
   2992 \def\Orb{\mathhexbox20D}
   2993 \fi
   2994 
   2995 % Quotes.
   2996 \chardef\quotedblleft="5C
   2997 \chardef\quotedblright=`\"
   2998 \chardef\quoteleft=`\`
   2999 \chardef\quoteright=`\'
   3000 
   3001 
   3002 \message{page headings,}
   3003 
   3004 \newskip\titlepagetopglue \titlepagetopglue = 1.5in
   3005 \newskip\titlepagebottomglue \titlepagebottomglue = 2pc
   3006 
   3007 % First the title page.  Must do @settitle before @titlepage.
   3008 \newif\ifseenauthor
   3009 \newif\iffinishedtitlepage
   3010 
   3011 % Do an implicit @contents or @shortcontents after @end titlepage if the
   3012 % user says @setcontentsaftertitlepage or @setshortcontentsaftertitlepage.
   3013 %
   3014 \newif\ifsetcontentsaftertitlepage
   3015  \let\setcontentsaftertitlepage = \setcontentsaftertitlepagetrue
   3016 \newif\ifsetshortcontentsaftertitlepage
   3017  \let\setshortcontentsaftertitlepage = \setshortcontentsaftertitlepagetrue
   3018 
   3019 \parseargdef\shorttitlepage{\begingroup\hbox{}\vskip 1.5in \chaprm \centerline{#1}%
   3020         \endgroup\page\hbox{}\page}
   3021 
   3022 \envdef\titlepage{%
   3023   % Open one extra group, as we want to close it in the middle of \Etitlepage.
   3024   \begingroup
   3025     \parindent=0pt \textfonts
   3026     % Leave some space at the very top of the page.
   3027     \vglue\titlepagetopglue
   3028     % No rule at page bottom unless we print one at the top with @title.
   3029     \finishedtitlepagetrue
   3030     %
   3031     % Most title ``pages'' are actually two pages long, with space
   3032     % at the top of the second.  We don't want the ragged left on the second.
   3033     \let\oldpage = \page
   3034     \def\page{%
   3035       \iffinishedtitlepage\else
   3036 	 \finishtitlepage
   3037       \fi
   3038       \let\page = \oldpage
   3039       \page
   3040       \null
   3041     }%
   3042 }
   3043 
   3044 \def\Etitlepage{%
   3045     \iffinishedtitlepage\else
   3046 	\finishtitlepage
   3047     \fi
   3048     % It is important to do the page break before ending the group,
   3049     % because the headline and footline are only empty inside the group.
   3050     % If we use the new definition of \page, we always get a blank page
   3051     % after the title page, which we certainly don't want.
   3052     \oldpage
   3053   \endgroup
   3054   %
   3055   % Need this before the \...aftertitlepage checks so that if they are
   3056   % in effect the toc pages will come out with page numbers.
   3057   \HEADINGSon
   3058   %
   3059   % If they want short, they certainly want long too.
   3060   \ifsetshortcontentsaftertitlepage
   3061     \shortcontents
   3062     \contents
   3063     \global\let\shortcontents = \relax
   3064     \global\let\contents = \relax
   3065   \fi
   3066   %
   3067   \ifsetcontentsaftertitlepage
   3068     \contents
   3069     \global\let\contents = \relax
   3070     \global\let\shortcontents = \relax
   3071   \fi
   3072 }
   3073 
   3074 \def\finishtitlepage{%
   3075   \vskip4pt \hrule height 2pt width \hsize
   3076   \vskip\titlepagebottomglue
   3077   \finishedtitlepagetrue
   3078 }
   3079 
   3080 %%% Macros to be used within @titlepage:
   3081 
   3082 \let\subtitlerm=\tenrm
   3083 \def\subtitlefont{\subtitlerm \normalbaselineskip = 13pt \normalbaselines}
   3084 
   3085 \parseargdef\title{%
   3086   \checkenv\titlepage
   3087   \leftline{\titlefonts\rmisbold #1}
   3088   % print a rule at the page bottom also.
   3089   \finishedtitlepagefalse
   3090   \vskip4pt \hrule height 4pt width \hsize \vskip4pt
   3091 }
   3092 
   3093 \parseargdef\subtitle{%
   3094   \checkenv\titlepage
   3095   {\subtitlefont \rightline{#1}}%
   3096 }
   3097 
   3098 % @author should come last, but may come many times.
   3099 % It can also be used inside @quotation.
   3100 %
   3101 \parseargdef\author{%
   3102   \def\temp{\quotation}%
   3103   \ifx\thisenv\temp
   3104     \def\quotationauthor{#1}% printed in \Equotation.
   3105   \else
   3106     \checkenv\titlepage
   3107     \ifseenauthor\else \vskip 0pt plus 1filll \seenauthortrue \fi
   3108     {\secfonts\rmisbold \leftline{#1}}%
   3109   \fi
   3110 }
   3111 
   3112 
   3113 %%% Set up page headings and footings.
   3114 
   3115 \let\thispage=\folio
   3116 
   3117 \newtoks\evenheadline    % headline on even pages
   3118 \newtoks\oddheadline     % headline on odd pages
   3119 \newtoks\evenfootline    % footline on even pages
   3120 \newtoks\oddfootline     % footline on odd pages
   3121 
   3122 % Now make TeX use those variables
   3123 \headline={{\textfonts\rm \ifodd\pageno \the\oddheadline
   3124                             \else \the\evenheadline \fi}}
   3125 \footline={{\textfonts\rm \ifodd\pageno \the\oddfootline
   3126                             \else \the\evenfootline \fi}\HEADINGShook}
   3127 \let\HEADINGShook=\relax
   3128 
   3129 % Commands to set those variables.
   3130 % For example, this is what  @headings on  does
   3131 % @evenheading @thistitle|@thispage|@thischapter
   3132 % @oddheading @thischapter|@thispage|@thistitle
   3133 % @evenfooting @thisfile||
   3134 % @oddfooting ||@thisfile
   3135 
   3136 
   3137 \def\evenheading{\parsearg\evenheadingxxx}
   3138 \def\evenheadingxxx #1{\evenheadingyyy #1\|\|\|\|\finish}
   3139 \def\evenheadingyyy #1\|#2\|#3\|#4\finish{%
   3140 \global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
   3141 
   3142 \def\oddheading{\parsearg\oddheadingxxx}
   3143 \def\oddheadingxxx #1{\oddheadingyyy #1\|\|\|\|\finish}
   3144 \def\oddheadingyyy #1\|#2\|#3\|#4\finish{%
   3145 \global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
   3146 
   3147 \parseargdef\everyheading{\oddheadingxxx{#1}\evenheadingxxx{#1}}%
   3148 
   3149 \def\evenfooting{\parsearg\evenfootingxxx}
   3150 \def\evenfootingxxx #1{\evenfootingyyy #1\|\|\|\|\finish}
   3151 \def\evenfootingyyy #1\|#2\|#3\|#4\finish{%
   3152 \global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
   3153 
   3154 \def\oddfooting{\parsearg\oddfootingxxx}
   3155 \def\oddfootingxxx #1{\oddfootingyyy #1\|\|\|\|\finish}
   3156 \def\oddfootingyyy #1\|#2\|#3\|#4\finish{%
   3157   \global\oddfootline = {\rlap{\centerline{#2}}\line{#1\hfil#3}}%
   3158   %
   3159   % Leave some space for the footline.  Hopefully ok to assume
   3160   % @evenfooting will not be used by itself.
   3161   \global\advance\pageheight by -12pt
   3162   \global\advance\vsize by -12pt
   3163 }
   3164 
   3165 \parseargdef\everyfooting{\oddfootingxxx{#1}\evenfootingxxx{#1}}
   3166 
   3167 % @evenheadingmarks top     \thischapter <- chapter at the top of a page
   3168 % @evenheadingmarks bottom  \thischapter <- chapter at the bottom of a page
   3169 %
   3170 % The same set of arguments for:
   3171 %
   3172 % @oddheadingmarks
   3173 % @evenfootingmarks
   3174 % @oddfootingmarks
   3175 % @everyheadingmarks
   3176 % @everyfootingmarks
   3177 
   3178 \def\evenheadingmarks{\headingmarks{even}{heading}}
   3179 \def\oddheadingmarks{\headingmarks{odd}{heading}}
   3180 \def\evenfootingmarks{\headingmarks{even}{footing}}
   3181 \def\oddfootingmarks{\headingmarks{odd}{footing}}
   3182 \def\everyheadingmarks#1 {\headingmarks{even}{heading}{#1}
   3183                           \headingmarks{odd}{heading}{#1} }
   3184 \def\everyfootingmarks#1 {\headingmarks{even}{footing}{#1}
   3185                           \headingmarks{odd}{footing}{#1} }
   3186 % #1 = even/odd, #2 = heading/footing, #3 = top/bottom.
   3187 \def\headingmarks#1#2#3 {%
   3188   \expandafter\let\expandafter\temp \csname get#3headingmarks\endcsname
   3189   \global\expandafter\let\csname get#1#2marks\endcsname \temp
   3190 }
   3191 
   3192 \everyheadingmarks bottom
   3193 \everyfootingmarks bottom
   3194 
   3195 % @headings double      turns headings on for double-sided printing.
   3196 % @headings single      turns headings on for single-sided printing.
   3197 % @headings off         turns them off.
   3198 % @headings on          same as @headings double, retained for compatibility.
   3199 % @headings after       turns on double-sided headings after this page.
   3200 % @headings doubleafter turns on double-sided headings after this page.
   3201 % @headings singleafter turns on single-sided headings after this page.
   3202 % By default, they are off at the start of a document,
   3203 % and turned `on' after @end titlepage.
   3204 
   3205 \def\headings #1 {\csname HEADINGS#1\endcsname}
   3206 
   3207 \def\HEADINGSoff{%
   3208 \global\evenheadline={\hfil} \global\evenfootline={\hfil}
   3209 \global\oddheadline={\hfil} \global\oddfootline={\hfil}}
   3210 \HEADINGSoff
   3211 % When we turn headings on, set the page number to 1.
   3212 % For double-sided printing, put current file name in lower left corner,
   3213 % chapter name on inside top of right hand pages, document
   3214 % title on inside top of left hand pages, and page numbers on outside top
   3215 % edge of all pages.
   3216 \def\HEADINGSdouble{%
   3217 \global\pageno=1
   3218 \global\evenfootline={\hfil}
   3219 \global\oddfootline={\hfil}
   3220 \global\evenheadline={\line{\folio\hfil\thistitle}}
   3221 \global\oddheadline={\line{\thischapter\hfil\folio}}
   3222 \global\let\contentsalignmacro = \chapoddpage
   3223 }
   3224 \let\contentsalignmacro = \chappager
   3225 
   3226 % For single-sided printing, chapter title goes across top left of page,
   3227 % page number on top right.
   3228 \def\HEADINGSsingle{%
   3229 \global\pageno=1
   3230 \global\evenfootline={\hfil}
   3231 \global\oddfootline={\hfil}
   3232 \global\evenheadline={\line{\thischapter\hfil\folio}}
   3233 \global\oddheadline={\line{\thischapter\hfil\folio}}
   3234 \global\let\contentsalignmacro = \chappager
   3235 }
   3236 \def\HEADINGSon{\HEADINGSdouble}
   3237 
   3238 \def\HEADINGSafter{\let\HEADINGShook=\HEADINGSdoublex}
   3239 \let\HEADINGSdoubleafter=\HEADINGSafter
   3240 \def\HEADINGSdoublex{%
   3241 \global\evenfootline={\hfil}
   3242 \global\oddfootline={\hfil}
   3243 \global\evenheadline={\line{\folio\hfil\thistitle}}
   3244 \global\oddheadline={\line{\thischapter\hfil\folio}}
   3245 \global\let\contentsalignmacro = \chapoddpage
   3246 }
   3247 
   3248 \def\HEADINGSsingleafter{\let\HEADINGShook=\HEADINGSsinglex}
   3249 \def\HEADINGSsinglex{%
   3250 \global\evenfootline={\hfil}
   3251 \global\oddfootline={\hfil}
   3252 \global\evenheadline={\line{\thischapter\hfil\folio}}
   3253 \global\oddheadline={\line{\thischapter\hfil\folio}}
   3254 \global\let\contentsalignmacro = \chappager
   3255 }
   3256 
   3257 % Subroutines used in generating headings
   3258 % This produces Day Month Year style of output.
   3259 % Only define if not already defined, in case a txi-??.tex file has set
   3260 % up a different format (e.g., txi-cs.tex does this).
   3261 \ifx\today\undefined
   3262 \def\today{%
   3263   \number\day\space
   3264   \ifcase\month
   3265   \or\putwordMJan\or\putwordMFeb\or\putwordMMar\or\putwordMApr
   3266   \or\putwordMMay\or\putwordMJun\or\putwordMJul\or\putwordMAug
   3267   \or\putwordMSep\or\putwordMOct\or\putwordMNov\or\putwordMDec
   3268   \fi
   3269   \space\number\year}
   3270 \fi
   3271 
   3272 % @settitle line...  specifies the title of the document, for headings.
   3273 % It generates no output of its own.
   3274 \def\thistitle{\putwordNoTitle}
   3275 \def\settitle{\parsearg{\gdef\thistitle}}
   3276 
   3277 
   3278 \message{tables,}
   3279 % Tables -- @table, @ftable, @vtable, @item(x).
   3280 
   3281 % default indentation of table text
   3282 \newdimen\tableindent \tableindent=.8in
   3283 % default indentation of @itemize and @enumerate text
   3284 \newdimen\itemindent  \itemindent=.3in
   3285 % margin between end of table item and start of table text.
   3286 \newdimen\itemmargin  \itemmargin=.1in
   3287 
   3288 % used internally for \itemindent minus \itemmargin
   3289 \newdimen\itemmax
   3290 
   3291 % Note @table, @ftable, and @vtable define @item, @itemx, etc., with
   3292 % these defs.
   3293 % They also define \itemindex
   3294 % to index the item name in whatever manner is desired (perhaps none).
   3295 
   3296 \newif\ifitemxneedsnegativevskip
   3297 
   3298 \def\itemxpar{\par\ifitemxneedsnegativevskip\nobreak\vskip-\parskip\nobreak\fi}
   3299 
   3300 \def\internalBitem{\smallbreak \parsearg\itemzzz}
   3301 \def\internalBitemx{\itemxpar \parsearg\itemzzz}
   3302 
   3303 \def\itemzzz #1{\begingroup %
   3304   \advance\hsize by -\rightskip
   3305   \advance\hsize by -\tableindent
   3306   \setbox0=\hbox{\itemindicate{#1}}%
   3307   \itemindex{#1}%
   3308   \nobreak % This prevents a break before @itemx.
   3309   %
   3310   % If the item text does not fit in the space we have, put it on a line
   3311   % by itself, and do not allow a page break either before or after that
   3312   % line.  We do not start a paragraph here because then if the next
   3313   % command is, e.g., @kindex, the whatsit would get put into the
   3314   % horizontal list on a line by itself, resulting in extra blank space.
   3315   \ifdim \wd0>\itemmax
   3316     %
   3317     % Make this a paragraph so we get the \parskip glue and wrapping,
   3318     % but leave it ragged-right.
   3319     \begingroup
   3320       \advance\leftskip by-\tableindent
   3321       \advance\hsize by\tableindent
   3322       \advance\rightskip by0pt plus1fil
   3323       \leavevmode\unhbox0\par
   3324     \endgroup
   3325     %
   3326     % We're going to be starting a paragraph, but we don't want the
   3327     % \parskip glue -- logically it's part of the @item we just started.
   3328     \nobreak \vskip-\parskip
   3329     %
   3330     % Stop a page break at the \parskip glue coming up.  However, if
   3331     % what follows is an environment such as @example, there will be no
   3332     % \parskip glue; then the negative vskip we just inserted would
   3333     % cause the example and the item to crash together.  So we use this
   3334     % bizarre value of 10001 as a signal to \aboveenvbreak to insert
   3335     % \parskip glue after all.  Section titles are handled this way also.
   3336     %
   3337     \penalty 10001
   3338     \endgroup
   3339     \itemxneedsnegativevskipfalse
   3340   \else
   3341     % The item text fits into the space.  Start a paragraph, so that the
   3342     % following text (if any) will end up on the same line.
   3343     \noindent
   3344     % Do this with kerns and \unhbox so that if there is a footnote in
   3345     % the item text, it can migrate to the main vertical list and
   3346     % eventually be printed.
   3347     \nobreak\kern-\tableindent
   3348     \dimen0 = \itemmax  \advance\dimen0 by \itemmargin \advance\dimen0 by -\wd0
   3349     \unhbox0
   3350     \nobreak\kern\dimen0
   3351     \endgroup
   3352     \itemxneedsnegativevskiptrue
   3353   \fi
   3354 }
   3355 
   3356 \def\item{\errmessage{@item while not in a list environment}}
   3357 \def\itemx{\errmessage{@itemx while not in a list environment}}
   3358 
   3359 % @table, @ftable, @vtable.
   3360 \envdef\table{%
   3361   \let\itemindex\gobble
   3362   \tablecheck{table}%
   3363 }
   3364 \envdef\ftable{%
   3365   \def\itemindex ##1{\doind {fn}{\code{##1}}}%
   3366   \tablecheck{ftable}%
   3367 }
   3368 \envdef\vtable{%
   3369   \def\itemindex ##1{\doind {vr}{\code{##1}}}%
   3370   \tablecheck{vtable}%
   3371 }
   3372 \def\tablecheck#1{%
   3373   \ifnum \the\catcode`\^^M=\active
   3374     \endgroup
   3375     \errmessage{This command won't work in this context; perhaps the problem is
   3376       that we are \inenvironment\thisenv}%
   3377     \def\next{\doignore{#1}}%
   3378   \else
   3379     \let\next\tablex
   3380   \fi
   3381   \next
   3382 }
   3383 \def\tablex#1{%
   3384   \def\itemindicate{#1}%
   3385   \parsearg\tabley
   3386 }
   3387 \def\tabley#1{%
   3388   {%
   3389     \makevalueexpandable
   3390     \edef\temp{\noexpand\tablez #1\space\space\space}%
   3391     \expandafter
   3392   }\temp \endtablez
   3393 }
   3394 \def\tablez #1 #2 #3 #4\endtablez{%
   3395   \aboveenvbreak
   3396   \ifnum 0#1>0 \advance \leftskip by #1\mil \fi
   3397   \ifnum 0#2>0 \tableindent=#2\mil \fi
   3398   \ifnum 0#3>0 \advance \rightskip by #3\mil \fi
   3399   \itemmax=\tableindent
   3400   \advance \itemmax by -\itemmargin
   3401   \advance \leftskip by \tableindent
   3402   \exdentamount=\tableindent
   3403   \parindent = 0pt
   3404   \parskip = \smallskipamount
   3405   \ifdim \parskip=0pt \parskip=2pt \fi
   3406   \let\item = \internalBitem
   3407   \let\itemx = \internalBitemx
   3408 }
   3409 \def\Etable{\endgraf\afterenvbreak}
   3410 \let\Eftable\Etable
   3411 \let\Evtable\Etable
   3412 \let\Eitemize\Etable
   3413 \let\Eenumerate\Etable
   3414 
   3415 % This is the counter used by @enumerate, which is really @itemize
   3416 
   3417 \newcount \itemno
   3418 
   3419 \envdef\itemize{\parsearg\doitemize}
   3420 
   3421 \def\doitemize#1{%
   3422   \aboveenvbreak
   3423   \itemmax=\itemindent
   3424   \advance\itemmax by -\itemmargin
   3425   \advance\leftskip by \itemindent
   3426   \exdentamount=\itemindent
   3427   \parindent=0pt
   3428   \parskip=\smallskipamount
   3429   \ifdim\parskip=0pt \parskip=2pt \fi
   3430   %
   3431   % Try typesetting the item mark that if the document erroneously says
   3432   % something like @itemize @samp (intending @table), there's an error
   3433   % right away at the @itemize.  It's not the best error message in the
   3434   % world, but it's better than leaving it to the @item.  This means if
   3435   % the user wants an empty mark, they have to say @w{} not just @w.
   3436   \def\itemcontents{#1}%
   3437   \setbox0 = \hbox{\itemcontents}%
   3438   %
   3439   % @itemize with no arg is equivalent to @itemize @bullet.
   3440   \ifx\itemcontents\empty\def\itemcontents{\bullet}\fi
   3441   %
   3442   \let\item=\itemizeitem
   3443 }
   3444 
   3445 % Definition of @item while inside @itemize and @enumerate.
   3446 %
   3447 \def\itemizeitem{%
   3448   \advance\itemno by 1  % for enumerations
   3449   {\let\par=\endgraf \smallbreak}% reasonable place to break
   3450   {%
   3451    % If the document has an @itemize directly after a section title, a
   3452    % \nobreak will be last on the list, and \sectionheading will have
   3453    % done a \vskip-\parskip.  In that case, we don't want to zero
   3454    % parskip, or the item text will crash with the heading.  On the
   3455    % other hand, when there is normal text preceding the item (as there
   3456    % usually is), we do want to zero parskip, or there would be too much
   3457    % space.  In that case, we won't have a \nobreak before.  At least
   3458    % that's the theory.
   3459    \ifnum\lastpenalty<10000 \parskip=0in \fi
   3460    \noindent
   3461    \hbox to 0pt{\hss \itemcontents \kern\itemmargin}%
   3462    %
   3463    \vadjust{\penalty 1200}}% not good to break after first line of item.
   3464   \flushcr
   3465 }
   3466 
   3467 % \splitoff TOKENS\endmark defines \first to be the first token in
   3468 % TOKENS, and \rest to be the remainder.
   3469 %
   3470 \def\splitoff#1#2\endmark{\def\first{#1}\def\rest{#2}}%
   3471 
   3472 % Allow an optional argument of an uppercase letter, lowercase letter,
   3473 % or number, to specify the first label in the enumerated list.  No
   3474 % argument is the same as `1'.
   3475 %
   3476 \envparseargdef\enumerate{\enumeratey #1  \endenumeratey}
   3477 \def\enumeratey #1 #2\endenumeratey{%
   3478   % If we were given no argument, pretend we were given `1'.
   3479   \def\thearg{#1}%
   3480   \ifx\thearg\empty \def\thearg{1}\fi
   3481   %
   3482   % Detect if the argument is a single token.  If so, it might be a
   3483   % letter.  Otherwise, the only valid thing it can be is a number.
   3484   % (We will always have one token, because of the test we just made.
   3485   % This is a good thing, since \splitoff doesn't work given nothing at
   3486   % all -- the first parameter is undelimited.)
   3487   \expandafter\splitoff\thearg\endmark
   3488   \ifx\rest\empty
   3489     % Only one token in the argument.  It could still be anything.
   3490     % A ``lowercase letter'' is one whose \lccode is nonzero.
   3491     % An ``uppercase letter'' is one whose \lccode is both nonzero, and
   3492     %   not equal to itself.
   3493     % Otherwise, we assume it's a number.
   3494     %
   3495     % We need the \relax at the end of the \ifnum lines to stop TeX from
   3496     % continuing to look for a <number>.
   3497     %
   3498     \ifnum\lccode\expandafter`\thearg=0\relax
   3499       \numericenumerate % a number (we hope)
   3500     \else
   3501       % It's a letter.
   3502       \ifnum\lccode\expandafter`\thearg=\expandafter`\thearg\relax
   3503         \lowercaseenumerate % lowercase letter
   3504       \else
   3505         \uppercaseenumerate % uppercase letter
   3506       \fi
   3507     \fi
   3508   \else
   3509     % Multiple tokens in the argument.  We hope it's a number.
   3510     \numericenumerate
   3511   \fi
   3512 }
   3513 
   3514 % An @enumerate whose labels are integers.  The starting integer is
   3515 % given in \thearg.
   3516 %
   3517 \def\numericenumerate{%
   3518   \itemno = \thearg
   3519   \startenumeration{\the\itemno}%
   3520 }
   3521 
   3522 % The starting (lowercase) letter is in \thearg.
   3523 \def\lowercaseenumerate{%
   3524   \itemno = \expandafter`\thearg
   3525   \startenumeration{%
   3526     % Be sure we're not beyond the end of the alphabet.
   3527     \ifnum\itemno=0
   3528       \errmessage{No more lowercase letters in @enumerate; get a bigger
   3529                   alphabet}%
   3530     \fi
   3531     \char\lccode\itemno
   3532   }%
   3533 }
   3534 
   3535 % The starting (uppercase) letter is in \thearg.
   3536 \def\uppercaseenumerate{%
   3537   \itemno = \expandafter`\thearg
   3538   \startenumeration{%
   3539     % Be sure we're not beyond the end of the alphabet.
   3540     \ifnum\itemno=0
   3541       \errmessage{No more uppercase letters in @enumerate; get a bigger
   3542                   alphabet}
   3543     \fi
   3544     \char\uccode\itemno
   3545   }%
   3546 }
   3547 
   3548 % Call \doitemize, adding a period to the first argument and supplying the
   3549 % common last two arguments.  Also subtract one from the initial value in
   3550 % \itemno, since @item increments \itemno.
   3551 %
   3552 \def\startenumeration#1{%
   3553   \advance\itemno by -1
   3554   \doitemize{#1.}\flushcr
   3555 }
   3556 
   3557 % @alphaenumerate and @capsenumerate are abbreviations for giving an arg
   3558 % to @enumerate.
   3559 %
   3560 \def\alphaenumerate{\enumerate{a}}
   3561 \def\capsenumerate{\enumerate{A}}
   3562 \def\Ealphaenumerate{\Eenumerate}
   3563 \def\Ecapsenumerate{\Eenumerate}
   3564 
   3565 
   3566 % @multitable macros
   3567 % Amy Hendrickson, 8/18/94, 3/6/96
   3568 %
   3569 % @multitable ... @end multitable will make as many columns as desired.
   3570 % Contents of each column will wrap at width given in preamble.  Width
   3571 % can be specified either with sample text given in a template line,
   3572 % or in percent of \hsize, the current width of text on page.
   3573 
   3574 % Table can continue over pages but will only break between lines.
   3575 
   3576 % To make preamble:
   3577 %
   3578 % Either define widths of columns in terms of percent of \hsize:
   3579 %   @multitable @columnfractions .25 .3 .45
   3580 %   @item ...
   3581 %
   3582 %   Numbers following @columnfractions are the percent of the total
   3583 %   current hsize to be used for each column. You may use as many
   3584 %   columns as desired.
   3585 
   3586 
   3587 % Or use a template:
   3588 %   @multitable {Column 1 template} {Column 2 template} {Column 3 template}
   3589 %   @item ...
   3590 %   using the widest term desired in each column.
   3591 
   3592 % Each new table line starts with @item, each subsequent new column
   3593 % starts with @tab. Empty columns may be produced by supplying @tab's
   3594 % with nothing between them for as many times as empty columns are needed,
   3595 % ie, @tab@tab@tab will produce two empty columns.
   3596 
   3597 % @item, @tab do not need to be on their own lines, but it will not hurt
   3598 % if they are.
   3599 
   3600 % Sample multitable:
   3601 
   3602 %   @multitable {Column 1 template} {Column 2 template} {Column 3 template}
   3603 %   @item first col stuff @tab second col stuff @tab third col
   3604 %   @item
   3605 %   first col stuff
   3606 %   @tab
   3607 %   second col stuff
   3608 %   @tab
   3609 %   third col
   3610 %   @item first col stuff @tab second col stuff
   3611 %   @tab Many paragraphs of text may be used in any column.
   3612 %
   3613 %         They will wrap at the width determined by the template.
   3614 %   @item@tab@tab This will be in third column.
   3615 %   @end multitable
   3616 
   3617 % Default dimensions may be reset by user.
   3618 % @multitableparskip is vertical space between paragraphs in table.
   3619 % @multitableparindent is paragraph indent in table.
   3620 % @multitablecolmargin is horizontal space to be left between columns.
   3621 % @multitablelinespace is space to leave between table items, baseline
   3622 %                                                            to baseline.
   3623 %   0pt means it depends on current normal line spacing.
   3624 %
   3625 \newskip\multitableparskip
   3626 \newskip\multitableparindent
   3627 \newdimen\multitablecolspace
   3628 \newskip\multitablelinespace
   3629 \multitableparskip=0pt
   3630 \multitableparindent=6pt
   3631 \multitablecolspace=12pt
   3632 \multitablelinespace=0pt
   3633 
   3634 % Macros used to set up halign preamble:
   3635 %
   3636 \let\endsetuptable\relax
   3637 \def\xendsetuptable{\endsetuptable}
   3638 \let\columnfractions\relax
   3639 \def\xcolumnfractions{\columnfractions}
   3640 \newif\ifsetpercent
   3641 
   3642 % #1 is the @columnfraction, usually a decimal number like .5, but might
   3643 % be just 1.  We just use it, whatever it is.
   3644 %
   3645 \def\pickupwholefraction#1 {%
   3646   \global\advance\colcount by 1
   3647   \expandafter\xdef\csname col\the\colcount\endcsname{#1\hsize}%
   3648   \setuptable
   3649 }
   3650 
   3651 \newcount\colcount
   3652 \def\setuptable#1{%
   3653   \def\firstarg{#1}%
   3654   \ifx\firstarg\xendsetuptable
   3655     \let\go = \relax
   3656   \else
   3657     \ifx\firstarg\xcolumnfractions
   3658       \global\setpercenttrue
   3659     \else
   3660       \ifsetpercent
   3661          \let\go\pickupwholefraction
   3662       \else
   3663          \global\advance\colcount by 1
   3664          \setbox0=\hbox{#1\unskip\space}% Add a normal word space as a
   3665                    % separator; typically that is always in the input, anyway.
   3666          \expandafter\xdef\csname col\the\colcount\endcsname{\the\wd0}%
   3667       \fi
   3668     \fi
   3669     \ifx\go\pickupwholefraction
   3670       % Put the argument back for the \pickupwholefraction call, so
   3671       % we'll always have a period there to be parsed.
   3672       \def\go{\pickupwholefraction#1}%
   3673     \else
   3674       \let\go = \setuptable
   3675     \fi%
   3676   \fi
   3677   \go
   3678 }
   3679 
   3680 % multitable-only commands.
   3681 %
   3682 % @headitem starts a heading row, which we typeset in bold.
   3683 % Assignments have to be global since we are inside the implicit group
   3684 % of an alignment entry.  \everycr resets \everytab so we don't have to
   3685 % undo it ourselves.
   3686 \def\headitemfont{\b}% for people to use in the template row; not changeable
   3687 \def\headitem{%
   3688   \checkenv\multitable
   3689   \crcr
   3690   \global\everytab={\bf}% can't use \headitemfont since the parsing differs
   3691   \the\everytab % for the first item
   3692 }%
   3693 %
   3694 % A \tab used to include \hskip1sp.  But then the space in a template
   3695 % line is not enough.  That is bad.  So let's go back to just `&' until
   3696 % we again encounter the problem the 1sp was intended to solve.
   3697 %					--karl, nathan (a] acm.org, 20apr99.
   3698 \def\tab{\checkenv\multitable &\the\everytab}%
   3699 
   3700 % @multitable ... @end multitable definitions:
   3701 %
   3702 \newtoks\everytab  % insert after every tab.
   3703 %
   3704 \envdef\multitable{%
   3705   \vskip\parskip
   3706   \startsavinginserts
   3707   %
   3708   % @item within a multitable starts a normal row.
   3709   % We use \def instead of \let so that if one of the multitable entries
   3710   % contains an @itemize, we don't choke on the \item (seen as \crcr aka
   3711   % \endtemplate) expanding \doitemize.
   3712   \def\item{\crcr}%
   3713   %
   3714   \tolerance=9500
   3715   \hbadness=9500
   3716   \setmultitablespacing
   3717   \parskip=\multitableparskip
   3718   \parindent=\multitableparindent
   3719   \overfullrule=0pt
   3720   \global\colcount=0
   3721   %
   3722   \everycr = {%
   3723     \noalign{%
   3724       \global\everytab={}%
   3725       \global\colcount=0 % Reset the column counter.
   3726       % Check for saved footnotes, etc.
   3727       \checkinserts
   3728       % Keeps underfull box messages off when table breaks over pages.
   3729       %\filbreak
   3730 	% Maybe so, but it also creates really weird page breaks when the
   3731 	% table breaks over pages. Wouldn't \vfil be better?  Wait until the
   3732 	% problem manifests itself, so it can be fixed for real --karl.
   3733     }%
   3734   }%
   3735   %
   3736   \parsearg\domultitable
   3737 }
   3738 \def\domultitable#1{%
   3739   % To parse everything between @multitable and @item:
   3740   \setuptable#1 \endsetuptable
   3741   %
   3742   % This preamble sets up a generic column definition, which will
   3743   % be used as many times as user calls for columns.
   3744   % \vtop will set a single line and will also let text wrap and
   3745   % continue for many paragraphs if desired.
   3746   \halign\bgroup &%
   3747     \global\advance\colcount by 1
   3748     \multistrut
   3749     \vtop{%
   3750       % Use the current \colcount to find the correct column width:
   3751       \hsize=\expandafter\csname col\the\colcount\endcsname
   3752       %
   3753       % In order to keep entries from bumping into each other
   3754       % we will add a \leftskip of \multitablecolspace to all columns after
   3755       % the first one.
   3756       %
   3757       % If a template has been used, we will add \multitablecolspace
   3758       % to the width of each template entry.
   3759       %
   3760       % If the user has set preamble in terms of percent of \hsize we will
   3761       % use that dimension as the width of the column, and the \leftskip
   3762       % will keep entries from bumping into each other.  Table will start at
   3763       % left margin and final column will justify at right margin.
   3764       %
   3765       % Make sure we don't inherit \rightskip from the outer environment.
   3766       \rightskip=0pt
   3767       \ifnum\colcount=1
   3768 	% The first column will be indented with the surrounding text.
   3769 	\advance\hsize by\leftskip
   3770       \else
   3771 	\ifsetpercent \else
   3772 	  % If user has not set preamble in terms of percent of \hsize
   3773 	  % we will advance \hsize by \multitablecolspace.
   3774 	  \advance\hsize by \multitablecolspace
   3775 	\fi
   3776        % In either case we will make \leftskip=\multitablecolspace:
   3777       \leftskip=\multitablecolspace
   3778       \fi
   3779       % Ignoring space at the beginning and end avoids an occasional spurious
   3780       % blank line, when TeX decides to break the line at the space before the
   3781       % box from the multistrut, so the strut ends up on a line by itself.
   3782       % For example:
   3783       % @multitable @columnfractions .11 .89
   3784       % @item @code{#}
   3785       % @tab Legal holiday which is valid in major parts of the whole country.
   3786       % Is automatically provided with highlighting sequences respectively
   3787       % marking characters.
   3788       \noindent\ignorespaces##\unskip\multistrut
   3789     }\cr
   3790 }
   3791 \def\Emultitable{%
   3792   \crcr
   3793   \egroup % end the \halign
   3794   \global\setpercentfalse
   3795 }
   3796 
   3797 \def\setmultitablespacing{%
   3798   \def\multistrut{\strut}% just use the standard line spacing
   3799   %
   3800   % Compute \multitablelinespace (if not defined by user) for use in
   3801   % \multitableparskip calculation.  We used define \multistrut based on
   3802   % this, but (ironically) that caused the spacing to be off.
   3803   % See bug-texinfo report from Werner Lemberg, 31 Oct 2004 12:52:20 +0100.
   3804 \ifdim\multitablelinespace=0pt
   3805 \setbox0=\vbox{X}\global\multitablelinespace=\the\baselineskip
   3806 \global\advance\multitablelinespace by-\ht0
   3807 \fi
   3808 %% Test to see if parskip is larger than space between lines of
   3809 %% table. If not, do nothing.
   3810 %%        If so, set to same dimension as multitablelinespace.
   3811 \ifdim\multitableparskip>\multitablelinespace
   3812 \global\multitableparskip=\multitablelinespace
   3813 \global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
   3814                                       %% than skip between lines in the table.
   3815 \fi%
   3816 \ifdim\multitableparskip=0pt
   3817 \global\multitableparskip=\multitablelinespace
   3818 \global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
   3819                                       %% than skip between lines in the table.
   3820 \fi}
   3821 
   3822 
   3823 \message{conditionals,}
   3824 
   3825 % @iftex, @ifnotdocbook, @ifnothtml, @ifnotinfo, @ifnotplaintext,
   3826 % @ifnotxml always succeed.  They currently do nothing; we don't
   3827 % attempt to check whether the conditionals are properly nested.  But we
   3828 % have to remember that they are conditionals, so that @end doesn't
   3829 % attempt to close an environment group.
   3830 %
   3831 \def\makecond#1{%
   3832   \expandafter\let\csname #1\endcsname = \relax
   3833   \expandafter\let\csname iscond.#1\endcsname = 1
   3834 }
   3835 \makecond{iftex}
   3836 \makecond{ifnotdocbook}
   3837 \makecond{ifnothtml}
   3838 \makecond{ifnotinfo}
   3839 \makecond{ifnotplaintext}
   3840 \makecond{ifnotxml}
   3841 
   3842 % Ignore @ignore, @ifhtml, @ifinfo, and the like.
   3843 %
   3844 \def\direntry{\doignore{direntry}}
   3845 \def\documentdescription{\doignore{documentdescription}}
   3846 \def\docbook{\doignore{docbook}}
   3847 \def\html{\doignore{html}}
   3848 \def\ifdocbook{\doignore{ifdocbook}}
   3849 \def\ifhtml{\doignore{ifhtml}}
   3850 \def\ifinfo{\doignore{ifinfo}}
   3851 \def\ifnottex{\doignore{ifnottex}}
   3852 \def\ifplaintext{\doignore{ifplaintext}}
   3853 \def\ifxml{\doignore{ifxml}}
   3854 \def\ignore{\doignore{ignore}}
   3855 \def\menu{\doignore{menu}}
   3856 \def\xml{\doignore{xml}}
   3857 
   3858 % Ignore text until a line `@end #1', keeping track of nested conditionals.
   3859 %
   3860 % A count to remember the depth of nesting.
   3861 \newcount\doignorecount
   3862 
   3863 \def\doignore#1{\begingroup
   3864   % Scan in ``verbatim'' mode:
   3865   \obeylines
   3866   \catcode`\@ = \other
   3867   \catcode`\{ = \other
   3868   \catcode`\} = \other
   3869   %
   3870   % Make sure that spaces turn into tokens that match what \doignoretext wants.
   3871   \spaceisspace
   3872   %
   3873   % Count number of #1's that we've seen.
   3874   \doignorecount = 0
   3875   %
   3876   % Swallow text until we reach the matching `@end #1'.
   3877   \dodoignore{#1}%
   3878 }
   3879 
   3880 { \catcode`_=11 % We want to use \_STOP_ which cannot appear in texinfo source.
   3881   \obeylines %
   3882   %
   3883   \gdef\dodoignore#1{%
   3884     % #1 contains the command name as a string, e.g., `ifinfo'.
   3885     %
   3886     % Define a command to find the next `@end #1'.
   3887     \long\def\doignoretext##1^^M@end #1{%
   3888       \doignoretextyyy##1^^M@#1\_STOP_}%
   3889     %
   3890     % And this command to find another #1 command, at the beginning of a
   3891     % line.  (Otherwise, we would consider a line `@c @ifset', for
   3892     % example, to count as an @ifset for nesting.)
   3893     \long\def\doignoretextyyy##1^^M@#1##2\_STOP_{\doignoreyyy{##2}\_STOP_}%
   3894     %
   3895     % And now expand that command.
   3896     \doignoretext ^^M%
   3897   }%
   3898 }
   3899 
   3900 \def\doignoreyyy#1{%
   3901   \def\temp{#1}%
   3902   \ifx\temp\empty			% Nothing found.
   3903     \let\next\doignoretextzzz
   3904   \else					% Found a nested condition, ...
   3905     \advance\doignorecount by 1
   3906     \let\next\doignoretextyyy		% ..., look for another.
   3907     % If we're here, #1 ends with ^^M\ifinfo (for example).
   3908   \fi
   3909   \next #1% the token \_STOP_ is present just after this macro.
   3910 }
   3911 
   3912 % We have to swallow the remaining "\_STOP_".
   3913 %
   3914 \def\doignoretextzzz#1{%
   3915   \ifnum\doignorecount = 0	% We have just found the outermost @end.
   3916     \let\next\enddoignore
   3917   \else				% Still inside a nested condition.
   3918     \advance\doignorecount by -1
   3919     \let\next\doignoretext      % Look for the next @end.
   3920   \fi
   3921   \next
   3922 }
   3923 
   3924 % Finish off ignored text.
   3925 { \obeylines%
   3926   % Ignore anything after the last `@end #1'; this matters in verbatim
   3927   % environments, where otherwise the newline after an ignored conditional
   3928   % would result in a blank line in the output.
   3929   \gdef\enddoignore#1^^M{\endgroup\ignorespaces}%
   3930 }
   3931 
   3932 
   3933 % @set VAR sets the variable VAR to an empty value.
   3934 % @set VAR REST-OF-LINE sets VAR to the value REST-OF-LINE.
   3935 %
   3936 % Since we want to separate VAR from REST-OF-LINE (which might be
   3937 % empty), we can't just use \parsearg; we have to insert a space of our
   3938 % own to delimit the rest of the line, and then take it out again if we
   3939 % didn't need it.
   3940 % We rely on the fact that \parsearg sets \catcode`\ =10.
   3941 %
   3942 \parseargdef\set{\setyyy#1 \endsetyyy}
   3943 \def\setyyy#1 #2\endsetyyy{%
   3944   {%
   3945     \makevalueexpandable
   3946     \def\temp{#2}%
   3947     \edef\next{\gdef\makecsname{SET#1}}%
   3948     \ifx\temp\empty
   3949       \next{}%
   3950     \else
   3951       \setzzz#2\endsetzzz
   3952     \fi
   3953   }%
   3954 }
   3955 % Remove the trailing space \setxxx inserted.
   3956 \def\setzzz#1 \endsetzzz{\next{#1}}
   3957 
   3958 % @clear VAR clears (i.e., unsets) the variable VAR.
   3959 %
   3960 \parseargdef\clear{%
   3961   {%
   3962     \makevalueexpandable
   3963     \global\expandafter\let\csname SET#1\endcsname=\relax
   3964   }%
   3965 }
   3966 
   3967 % @value{foo} gets the text saved in variable foo.
   3968 \def\value{\begingroup\makevalueexpandable\valuexxx}
   3969 \def\valuexxx#1{\expandablevalue{#1}\endgroup}
   3970 {
   3971   \catcode`\- = \active \catcode`\_ = \active
   3972   %
   3973   \gdef\makevalueexpandable{%
   3974     \let\value = \expandablevalue
   3975     % We don't want these characters active, ...
   3976     \catcode`\-=\other \catcode`\_=\other
   3977     % ..., but we might end up with active ones in the argument if
   3978     % we're called from @code, as @code{@value{foo-bar_}}, though.
   3979     % So \let them to their normal equivalents.
   3980     \let-\realdash \let_\normalunderscore
   3981   }
   3982 }
   3983 
   3984 % We have this subroutine so that we can handle at least some @value's
   3985 % properly in indexes (we call \makevalueexpandable in \indexdummies).
   3986 % The command has to be fully expandable (if the variable is set), since
   3987 % the result winds up in the index file.  This means that if the
   3988 % variable's value contains other Texinfo commands, it's almost certain
   3989 % it will fail (although perhaps we could fix that with sufficient work
   3990 % to do a one-level expansion on the result, instead of complete).
   3991 %
   3992 \def\expandablevalue#1{%
   3993   \expandafter\ifx\csname SET#1\endcsname\relax
   3994     {[No value for ``#1'']}%
   3995     \message{Variable `#1', used in @value, is not set.}%
   3996   \else
   3997     \csname SET#1\endcsname
   3998   \fi
   3999 }
   4000 
   4001 % @ifset VAR ... @end ifset reads the `...' iff VAR has been defined
   4002 % with @set.
   4003 %
   4004 % To get special treatment of `@end ifset,' call \makeond and the redefine.
   4005 %
   4006 \makecond{ifset}
   4007 \def\ifset{\parsearg{\doifset{\let\next=\ifsetfail}}}
   4008 \def\doifset#1#2{%
   4009   {%
   4010     \makevalueexpandable
   4011     \let\next=\empty
   4012     \expandafter\ifx\csname SET#2\endcsname\relax
   4013       #1% If not set, redefine \next.
   4014     \fi
   4015     \expandafter
   4016   }\next
   4017 }
   4018 \def\ifsetfail{\doignore{ifset}}
   4019 
   4020 % @ifclear VAR ... @end ifclear reads the `...' iff VAR has never been
   4021 % defined with @set, or has been undefined with @clear.
   4022 %
   4023 % The `\else' inside the `\doifset' parameter is a trick to reuse the
   4024 % above code: if the variable is not set, do nothing, if it is set,
   4025 % then redefine \next to \ifclearfail.
   4026 %
   4027 \makecond{ifclear}
   4028 \def\ifclear{\parsearg{\doifset{\else \let\next=\ifclearfail}}}
   4029 \def\ifclearfail{\doignore{ifclear}}
   4030 
   4031 % @dircategory CATEGORY  -- specify a category of the dir file
   4032 % which this file should belong to.  Ignore this in TeX.
   4033 \let\dircategory=\comment
   4034 
   4035 % @defininfoenclose.
   4036 \let\definfoenclose=\comment
   4037 
   4038 
   4039 \message{indexing,}
   4040 % Index generation facilities
   4041 
   4042 % Define \newwrite to be identical to plain tex's \newwrite
   4043 % except not \outer, so it can be used within macros and \if's.
   4044 \edef\newwrite{\makecsname{ptexnewwrite}}
   4045 
   4046 % \newindex {foo} defines an index named foo.
   4047 % It automatically defines \fooindex such that
   4048 % \fooindex ...rest of line... puts an entry in the index foo.
   4049 % It also defines \fooindfile to be the number of the output channel for
   4050 % the file that accumulates this index.  The file's extension is foo.
   4051 % The name of an index should be no more than 2 characters long
   4052 % for the sake of vms.
   4053 %
   4054 \def\newindex#1{%
   4055   \iflinks
   4056     \expandafter\newwrite \csname#1indfile\endcsname
   4057     \openout \csname#1indfile\endcsname \jobname.#1 % Open the file
   4058   \fi
   4059   \expandafter\xdef\csname#1index\endcsname{%     % Define @#1index
   4060     \noexpand\doindex{#1}}
   4061 }
   4062 
   4063 % @defindex foo  ==  \newindex{foo}
   4064 %
   4065 \def\defindex{\parsearg\newindex}
   4066 
   4067 % Define @defcodeindex, like @defindex except put all entries in @code.
   4068 %
   4069 \def\defcodeindex{\parsearg\newcodeindex}
   4070 %
   4071 \def\newcodeindex#1{%
   4072   \iflinks
   4073     \expandafter\newwrite \csname#1indfile\endcsname
   4074     \openout \csname#1indfile\endcsname \jobname.#1
   4075   \fi
   4076   \expandafter\xdef\csname#1index\endcsname{%
   4077     \noexpand\docodeindex{#1}}%
   4078 }
   4079 
   4080 
   4081 % @synindex foo bar    makes index foo feed into index bar.
   4082 % Do this instead of @defindex foo if you don't want it as a separate index.
   4083 %
   4084 % @syncodeindex foo bar   similar, but put all entries made for index foo
   4085 % inside @code.
   4086 %
   4087 \def\synindex#1 #2 {\dosynindex\doindex{#1}{#2}}
   4088 \def\syncodeindex#1 #2 {\dosynindex\docodeindex{#1}{#2}}
   4089 
   4090 % #1 is \doindex or \docodeindex, #2 the index getting redefined (foo),
   4091 % #3 the target index (bar).
   4092 \def\dosynindex#1#2#3{%
   4093   % Only do \closeout if we haven't already done it, else we'll end up
   4094   % closing the target index.
   4095   \expandafter \ifx\csname donesynindex#2\endcsname \relax
   4096     % The \closeout helps reduce unnecessary open files; the limit on the
   4097     % Acorn RISC OS is a mere 16 files.
   4098     \expandafter\closeout\csname#2indfile\endcsname
   4099     \expandafter\let\csname donesynindex#2\endcsname = 1
   4100   \fi
   4101   % redefine \fooindfile:
   4102   \expandafter\let\expandafter\temp\expandafter=\csname#3indfile\endcsname
   4103   \expandafter\let\csname#2indfile\endcsname=\temp
   4104   % redefine \fooindex:
   4105   \expandafter\xdef\csname#2index\endcsname{\noexpand#1{#3}}%
   4106 }
   4107 
   4108 % Define \doindex, the driver for all \fooindex macros.
   4109 % Argument #1 is generated by the calling \fooindex macro,
   4110 %  and it is "foo", the name of the index.
   4111 
   4112 % \doindex just uses \parsearg; it calls \doind for the actual work.
   4113 % This is because \doind is more useful to call from other macros.
   4114 
   4115 % There is also \dosubind {index}{topic}{subtopic}
   4116 % which makes an entry in a two-level index such as the operation index.
   4117 
   4118 \def\doindex#1{\edef\indexname{#1}\parsearg\singleindexer}
   4119 \def\singleindexer #1{\doind{\indexname}{#1}}
   4120 
   4121 % like the previous two, but they put @code around the argument.
   4122 \def\docodeindex#1{\edef\indexname{#1}\parsearg\singlecodeindexer}
   4123 \def\singlecodeindexer #1{\doind{\indexname}{\code{#1}}}
   4124 
   4125 % Take care of Texinfo commands that can appear in an index entry.
   4126 % Since there are some commands we want to expand, and others we don't,
   4127 % we have to laboriously prevent expansion for those that we don't.
   4128 %
   4129 \def\indexdummies{%
   4130   \escapechar = `\\     % use backslash in output files.
   4131   \def\@{@}% change to @@ when we switch to @ as escape char in index files.
   4132   \def\ {\realbackslash\space }%
   4133   %
   4134   % Need these in case \tex is in effect and \{ is a \delimiter again.
   4135   % But can't use \lbracecmd and \rbracecmd because texindex assumes
   4136   % braces and backslashes are used only as delimiters.
   4137   \let\{ = \mylbrace
   4138   \let\} = \myrbrace
   4139   %
   4140   % I don't entirely understand this, but when an index entry is
   4141   % generated from a macro call, the \endinput which \scanmacro inserts
   4142   % causes processing to be prematurely terminated.  This is,
   4143   % apparently, because \indexsorttmp is fully expanded, and \endinput
   4144   % is an expandable command.  The redefinition below makes \endinput
   4145   % disappear altogether for that purpose -- although logging shows that
   4146   % processing continues to some further point.  On the other hand, it
   4147   % seems \endinput does not hurt in the printed index arg, since that
   4148   % is still getting written without apparent harm.
   4149   %
   4150   % Sample source (mac-idx3.tex, reported by Graham Percival to
   4151   % help-texinfo, 22may06):
   4152   % @macro funindex {WORD}
   4153   % @findex xyz
   4154   % @end macro
   4155   % ...
   4156   % @funindex commtest
   4157   %
   4158   % The above is not enough to reproduce the bug, but it gives the flavor.
   4159   %
   4160   % Sample whatsit resulting:
   4161   % .@write3{\entry{xyz}{@folio }{@code {xyz@endinput }}}
   4162   %
   4163   % So:
   4164   \let\endinput = \empty
   4165   %
   4166   % Do the redefinitions.
   4167   \commondummies
   4168 }
   4169 
   4170 % For the aux and toc files, @ is the escape character.  So we want to
   4171 % redefine everything using @ as the escape character (instead of
   4172 % \realbackslash, still used for index files).  When everything uses @,
   4173 % this will be simpler.
   4174 %
   4175 \def\atdummies{%
   4176   \def\@{@@}%
   4177   \def\ {@ }%
   4178   \let\{ = \lbraceatcmd
   4179   \let\} = \rbraceatcmd
   4180   %
   4181   % Do the redefinitions.
   4182   \commondummies
   4183   \otherbackslash
   4184 }
   4185 
   4186 % Called from \indexdummies and \atdummies.
   4187 %
   4188 \def\commondummies{%
   4189   %
   4190   % \definedummyword defines \#1 as \string\#1\space, thus effectively
   4191   % preventing its expansion.  This is used only for control% words,
   4192   % not control letters, because the \space would be incorrect for
   4193   % control characters, but is needed to separate the control word
   4194   % from whatever follows.
   4195   %
   4196   % For control letters, we have \definedummyletter, which omits the
   4197   % space.
   4198   %
   4199   % These can be used both for control words that take an argument and
   4200   % those that do not.  If it is followed by {arg} in the input, then
   4201   % that will dutifully get written to the index (or wherever).
   4202   %
   4203   \def\definedummyword  ##1{\def##1{\string##1\space}}%
   4204   \def\definedummyletter##1{\def##1{\string##1}}%
   4205   \let\definedummyaccent\definedummyletter
   4206   %
   4207   \commondummiesnofonts
   4208   %
   4209   \definedummyletter\_%
   4210   %
   4211   % Non-English letters.
   4212   \definedummyword\AA
   4213   \definedummyword\AE
   4214   \definedummyword\DH
   4215   \definedummyword\L
   4216   \definedummyword\O
   4217   \definedummyword\OE
   4218   \definedummyword\TH
   4219   \definedummyword\aa
   4220   \definedummyword\ae
   4221   \definedummyword\dh
   4222   \definedummyword\exclamdown
   4223   \definedummyword\l
   4224   \definedummyword\o
   4225   \definedummyword\oe
   4226   \definedummyword\ordf
   4227   \definedummyword\ordm
   4228   \definedummyword\questiondown
   4229   \definedummyword\ss
   4230   \definedummyword\th
   4231   %
   4232   % Although these internal commands shouldn't show up, sometimes they do.
   4233   \definedummyword\bf
   4234   \definedummyword\gtr
   4235   \definedummyword\hat
   4236   \definedummyword\less
   4237   \definedummyword\sf
   4238   \definedummyword\sl
   4239   \definedummyword\tclose
   4240   \definedummyword\tt
   4241   %
   4242   \definedummyword\LaTeX
   4243   \definedummyword\TeX
   4244   %
   4245   % Assorted special characters.
   4246   \definedummyword\bullet
   4247   \definedummyword\comma
   4248   \definedummyword\copyright
   4249   \definedummyword\registeredsymbol
   4250   \definedummyword\dots
   4251   \definedummyword\enddots
   4252   \definedummyword\equiv
   4253   \definedummyword\error
   4254   \definedummyword\euro
   4255   \definedummyword\guillemetleft
   4256   \definedummyword\guillemetright
   4257   \definedummyword\guilsinglleft
   4258   \definedummyword\guilsinglright
   4259   \definedummyword\expansion
   4260   \definedummyword\minus
   4261   \definedummyword\ogonek
   4262   \definedummyword\pounds
   4263   \definedummyword\point
   4264   \definedummyword\print
   4265   \definedummyword\quotedblbase
   4266   \definedummyword\quotedblleft
   4267   \definedummyword\quotedblright
   4268   \definedummyword\quoteleft
   4269   \definedummyword\quoteright
   4270   \definedummyword\quotesinglbase
   4271   \definedummyword\result
   4272   \definedummyword\textdegree
   4273   %
   4274   % We want to disable all macros so that they are not expanded by \write.
   4275   \macrolist
   4276   %
   4277   \normalturnoffactive
   4278   %
   4279   % Handle some cases of @value -- where it does not contain any
   4280   % (non-fully-expandable) commands.
   4281   \makevalueexpandable
   4282 }
   4283 
   4284 % \commondummiesnofonts: common to \commondummies and \indexnofonts.
   4285 %
   4286 \def\commondummiesnofonts{%
   4287   % Control letters and accents.
   4288   \definedummyletter\!%
   4289   \definedummyaccent\"%
   4290   \definedummyaccent\'%
   4291   \definedummyletter\*%
   4292   \definedummyaccent\,%
   4293   \definedummyletter\.%
   4294   \definedummyletter\/%
   4295   \definedummyletter\:%
   4296   \definedummyaccent\=%
   4297   \definedummyletter\?%
   4298   \definedummyaccent\^%
   4299   \definedummyaccent\`%
   4300   \definedummyaccent\~%
   4301   \definedummyword\u
   4302   \definedummyword\v
   4303   \definedummyword\H
   4304   \definedummyword\dotaccent
   4305   \definedummyword\ogonek
   4306   \definedummyword\ringaccent
   4307   \definedummyword\tieaccent
   4308   \definedummyword\ubaraccent
   4309   \definedummyword\udotaccent
   4310   \definedummyword\dotless
   4311   %
   4312   % Texinfo font commands.
   4313   \definedummyword\b
   4314   \definedummyword\i
   4315   \definedummyword\r
   4316   \definedummyword\sc
   4317   \definedummyword\t
   4318   %
   4319   % Commands that take arguments.
   4320   \definedummyword\acronym
   4321   \definedummyword\cite
   4322   \definedummyword\code
   4323   \definedummyword\command
   4324   \definedummyword\dfn
   4325   \definedummyword\emph
   4326   \definedummyword\env
   4327   \definedummyword\file
   4328   \definedummyword\kbd
   4329   \definedummyword\key
   4330   \definedummyword\math
   4331   \definedummyword\option
   4332   \definedummyword\pxref
   4333   \definedummyword\ref
   4334   \definedummyword\samp
   4335   \definedummyword\strong
   4336   \definedummyword\tie
   4337   \definedummyword\uref
   4338   \definedummyword\url
   4339   \definedummyword\var
   4340   \definedummyword\verb
   4341   \definedummyword\w
   4342   \definedummyword\xref
   4343 }
   4344 
   4345 % \indexnofonts is used when outputting the strings to sort the index
   4346 % by, and when constructing control sequence names.  It eliminates all
   4347 % control sequences and just writes whatever the best ASCII sort string
   4348 % would be for a given command (usually its argument).
   4349 %
   4350 \def\indexnofonts{%
   4351   % Accent commands should become @asis.
   4352   \def\definedummyaccent##1{\let##1\asis}%
   4353   % We can just ignore other control letters.
   4354   \def\definedummyletter##1{\let##1\empty}%
   4355   % Hopefully, all control words can become @asis.
   4356   \let\definedummyword\definedummyaccent
   4357   %
   4358   \commondummiesnofonts
   4359   %
   4360   % Don't no-op \tt, since it isn't a user-level command
   4361   % and is used in the definitions of the active chars like <, >, |, etc.
   4362   % Likewise with the other plain tex font commands.
   4363   %\let\tt=\asis
   4364   %
   4365   \def\ { }%
   4366   \def\@{@}%
   4367   % how to handle braces?
   4368   \def\_{\normalunderscore}%
   4369   %
   4370   % Non-English letters.
   4371   \def\AA{AA}%
   4372   \def\AE{AE}%
   4373   \def\DH{DZZ}%
   4374   \def\L{L}%
   4375   \def\OE{OE}%
   4376   \def\O{O}%
   4377   \def\TH{ZZZ}%
   4378   \def\aa{aa}%
   4379   \def\ae{ae}%
   4380   \def\dh{dzz}%
   4381   \def\exclamdown{!}%
   4382   \def\l{l}%
   4383   \def\oe{oe}%
   4384   \def\ordf{a}%
   4385   \def\ordm{o}%
   4386   \def\o{o}%
   4387   \def\questiondown{?}%
   4388   \def\ss{ss}%
   4389   \def\th{zzz}%
   4390   %
   4391   \def\LaTeX{LaTeX}%
   4392   \def\TeX{TeX}%
   4393   %
   4394   % Assorted special characters.
   4395   % (The following {} will end up in the sort string, but that's ok.)
   4396   \def\bullet{bullet}%
   4397   \def\comma{,}%
   4398   \def\copyright{copyright}%
   4399   \def\registeredsymbol{R}%
   4400   \def\dots{...}%
   4401   \def\enddots{...}%
   4402   \def\equiv{==}%
   4403   \def\error{error}%
   4404   \def\euro{euro}%
   4405   \def\guillemetleft{<<}%
   4406   \def\guillemetright{>>}%
   4407   \def\guilsinglleft{<}%
   4408   \def\guilsinglright{>}%
   4409   \def\expansion{==>}%
   4410   \def\minus{-}%
   4411   \def\pounds{pounds}%
   4412   \def\point{.}%
   4413   \def\print{-|}%
   4414   \def\quotedblbase{"}%
   4415   \def\quotedblleft{"}%
   4416   \def\quotedblright{"}%
   4417   \def\quoteleft{`}%
   4418   \def\quoteright{'}%
   4419   \def\quotesinglbase{,}%
   4420   \def\result{=>}%
   4421   \def\textdegree{degrees}%
   4422   %
   4423   % We need to get rid of all macros, leaving only the arguments (if present).
   4424   % Of course this is not nearly correct, but it is the best we can do for now.
   4425   % makeinfo does not expand macros in the argument to @deffn, which ends up
   4426   % writing an index entry, and texindex isn't prepared for an index sort entry
   4427   % that starts with \.
   4428   %
   4429   % Since macro invocations are followed by braces, we can just redefine them
   4430   % to take a single TeX argument.  The case of a macro invocation that
   4431   % goes to end-of-line is not handled.
   4432   %
   4433   \macrolist
   4434 }
   4435 
   4436 \let\indexbackslash=0  %overridden during \printindex.
   4437 \let\SETmarginindex=\relax % put index entries in margin (undocumented)?
   4438 
   4439 % Most index entries go through here, but \dosubind is the general case.
   4440 % #1 is the index name, #2 is the entry text.
   4441 \def\doind#1#2{\dosubind{#1}{#2}{}}
   4442 
   4443 % Workhorse for all \fooindexes.
   4444 % #1 is name of index, #2 is stuff to put there, #3 is subentry --
   4445 % empty if called from \doind, as we usually are (the main exception
   4446 % is with most defuns, which call us directly).
   4447 %
   4448 \def\dosubind#1#2#3{%
   4449   \iflinks
   4450   {%
   4451     % Store the main index entry text (including the third arg).
   4452     \toks0 = {#2}%
   4453     % If third arg is present, precede it with a space.
   4454     \def\thirdarg{#3}%
   4455     \ifx\thirdarg\empty \else
   4456       \toks0 = \expandafter{\the\toks0 \space #3}%
   4457     \fi
   4458     %
   4459     \edef\writeto{\csname#1indfile\endcsname}%
   4460     %
   4461     \safewhatsit\dosubindwrite
   4462   }%
   4463   \fi
   4464 }
   4465 
   4466 % Write the entry in \toks0 to the index file:
   4467 %
   4468 \def\dosubindwrite{%
   4469   % Put the index entry in the margin if desired.
   4470   \ifx\SETmarginindex\relax\else
   4471     \insert\margin{\hbox{\vrule height8pt depth3pt width0pt \the\toks0}}%
   4472   \fi
   4473   %
   4474   % Remember, we are within a group.
   4475   \indexdummies % Must do this here, since \bf, etc expand at this stage
   4476   \def\backslashcurfont{\indexbackslash}% \indexbackslash isn't defined now
   4477       % so it will be output as is; and it will print as backslash.
   4478   %
   4479   % Process the index entry with all font commands turned off, to
   4480   % get the string to sort by.
   4481   {\indexnofonts
   4482    \edef\temp{\the\toks0}% need full expansion
   4483    \xdef\indexsorttmp{\temp}%
   4484   }%
   4485   %
   4486   % Set up the complete index entry, with both the sort key and
   4487   % the original text, including any font commands.  We write
   4488   % three arguments to \entry to the .?? file (four in the
   4489   % subentry case), texindex reduces to two when writing the .??s
   4490   % sorted result.
   4491   \edef\temp{%
   4492     \write\writeto{%
   4493       \string\entry{\indexsorttmp}{\noexpand\folio}{\the\toks0}}%
   4494   }%
   4495   \temp
   4496 }
   4497 
   4498 % Take care of unwanted page breaks/skips around a whatsit:
   4499 %
   4500 % If a skip is the last thing on the list now, preserve it
   4501 % by backing up by \lastskip, doing the \write, then inserting
   4502 % the skip again.  Otherwise, the whatsit generated by the
   4503 % \write or \pdfdest will make \lastskip zero.  The result is that
   4504 % sequences like this:
   4505 % @end defun
   4506 % @tindex whatever
   4507 % @defun ...
   4508 % will have extra space inserted, because the \medbreak in the
   4509 % start of the @defun won't see the skip inserted by the @end of
   4510 % the previous defun.
   4511 %
   4512 % But don't do any of this if we're not in vertical mode.  We
   4513 % don't want to do a \vskip and prematurely end a paragraph.
   4514 %
   4515 % Avoid page breaks due to these extra skips, too.
   4516 %
   4517 % But wait, there is a catch there:
   4518 % We'll have to check whether \lastskip is zero skip.  \ifdim is not
   4519 % sufficient for this purpose, as it ignores stretch and shrink parts
   4520 % of the skip.  The only way seems to be to check the textual
   4521 % representation of the skip.
   4522 %
   4523 % The following is almost like \def\zeroskipmacro{0.0pt} except that
   4524 % the ``p'' and ``t'' characters have catcode \other, not 11 (letter).
   4525 %
   4526 \edef\zeroskipmacro{\expandafter\the\csname z@skip\endcsname}
   4527 %
   4528 \newskip\whatsitskip
   4529 \newcount\whatsitpenalty
   4530 %
   4531 % ..., ready, GO:
   4532 %
   4533 \def\safewhatsit#1{%
   4534 \ifhmode
   4535   #1%
   4536 \else
   4537   % \lastskip and \lastpenalty cannot both be nonzero simultaneously.
   4538   \whatsitskip = \lastskip
   4539   \edef\lastskipmacro{\the\lastskip}%
   4540   \whatsitpenalty = \lastpenalty
   4541   %
   4542   % If \lastskip is nonzero, that means the last item was a
   4543   % skip.  And since a skip is discardable, that means this
   4544   % -\whatsitskip glue we're inserting is preceded by a
   4545   % non-discardable item, therefore it is not a potential
   4546   % breakpoint, therefore no \nobreak needed.
   4547   \ifx\lastskipmacro\zeroskipmacro
   4548   \else
   4549     \vskip-\whatsitskip
   4550   \fi
   4551   %
   4552   #1%
   4553   %
   4554   \ifx\lastskipmacro\zeroskipmacro
   4555     % If \lastskip was zero, perhaps the last item was a penalty, and
   4556     % perhaps it was >=10000, e.g., a \nobreak.  In that case, we want
   4557     % to re-insert the same penalty (values >10000 are used for various
   4558     % signals); since we just inserted a non-discardable item, any
   4559     % following glue (such as a \parskip) would be a breakpoint.  For example:
   4560     %
   4561     %   @deffn deffn-whatever
   4562     %   @vindex index-whatever
   4563     %   Description.
   4564     % would allow a break between the index-whatever whatsit
   4565     % and the "Description." paragraph.
   4566     \ifnum\whatsitpenalty>9999 \penalty\whatsitpenalty \fi
   4567   \else
   4568     % On the other hand, if we had a nonzero \lastskip,
   4569     % this make-up glue would be preceded by a non-discardable item
   4570     % (the whatsit from the \write), so we must insert a \nobreak.
   4571     \nobreak\vskip\whatsitskip
   4572   \fi
   4573 \fi
   4574 }
   4575 
   4576 % The index entry written in the file actually looks like
   4577 %  \entry {sortstring}{page}{topic}
   4578 % or
   4579 %  \entry {sortstring}{page}{topic}{subtopic}
   4580 % The texindex program reads in these files and writes files
   4581 % containing these kinds of lines:
   4582 %  \initial {c}
   4583 %     before the first topic whose initial is c
   4584 %  \entry {topic}{pagelist}
   4585 %     for a topic that is used without subtopics
   4586 %  \primary {topic}
   4587 %     for the beginning of a topic that is used with subtopics
   4588 %  \secondary {subtopic}{pagelist}
   4589 %     for each subtopic.
   4590 
   4591 % Define the user-accessible indexing commands
   4592 % @findex, @vindex, @kindex, @cindex.
   4593 
   4594 \def\findex {\fnindex}
   4595 \def\kindex {\kyindex}
   4596 \def\cindex {\cpindex}
   4597 \def\vindex {\vrindex}
   4598 \def\tindex {\tpindex}
   4599 \def\pindex {\pgindex}
   4600 
   4601 \def\cindexsub {\begingroup\obeylines\cindexsub}
   4602 {\obeylines %
   4603 \gdef\cindexsub "#1" #2^^M{\endgroup %
   4604 \dosubind{cp}{#2}{#1}}}
   4605 
   4606 % Define the macros used in formatting output of the sorted index material.
   4607 
   4608 % @printindex causes a particular index (the ??s file) to get printed.
   4609 % It does not print any chapter heading (usually an @unnumbered).
   4610 %
   4611 \parseargdef\printindex{\begingroup
   4612   \dobreak \chapheadingskip{10000}%
   4613   %
   4614   \smallfonts \rm
   4615   \tolerance = 9500
   4616   \plainfrenchspacing
   4617   \everypar = {}% don't want the \kern\-parindent from indentation suppression.
   4618   %
   4619   % See if the index file exists and is nonempty.
   4620   % Change catcode of @ here so that if the index file contains
   4621   % \initial {@}
   4622   % as its first line, TeX doesn't complain about mismatched braces
   4623   % (because it thinks @} is a control sequence).
   4624   \catcode`\@ = 11
   4625   \openin 1 \jobname.#1s
   4626   \ifeof 1
   4627     % \enddoublecolumns gets confused if there is no text in the index,
   4628     % and it loses the chapter title and the aux file entries for the
   4629     % index.  The easiest way to prevent this problem is to make sure
   4630     % there is some text.
   4631     \putwordIndexNonexistent
   4632   \else
   4633     %
   4634     % If the index file exists but is empty, then \openin leaves \ifeof
   4635     % false.  We have to make TeX try to read something from the file, so
   4636     % it can discover if there is anything in it.
   4637     \read 1 to \temp
   4638     \ifeof 1
   4639       \putwordIndexIsEmpty
   4640     \else
   4641       % Index files are almost Texinfo source, but we use \ as the escape
   4642       % character.  It would be better to use @, but that's too big a change
   4643       % to make right now.
   4644       \def\indexbackslash{\backslashcurfont}%
   4645       \catcode`\\ = 0
   4646       \escapechar = `\\
   4647       \begindoublecolumns
   4648       \input \jobname.#1s
   4649       \enddoublecolumns
   4650     \fi
   4651   \fi
   4652   \closein 1
   4653 \endgroup}
   4654 
   4655 % These macros are used by the sorted index file itself.
   4656 % Change them to control the appearance of the index.
   4657 
   4658 \def\initial#1{{%
   4659   % Some minor font changes for the special characters.
   4660   \let\tentt=\sectt \let\tt=\sectt \let\sf=\sectt
   4661   %
   4662   % Remove any glue we may have, we'll be inserting our own.
   4663   \removelastskip
   4664   %
   4665   % We like breaks before the index initials, so insert a bonus.
   4666   \nobreak
   4667   \vskip 0pt plus 3\baselineskip
   4668   \penalty 0
   4669   \vskip 0pt plus -3\baselineskip
   4670   %
   4671   % Typeset the initial.  Making this add up to a whole number of
   4672   % baselineskips increases the chance of the dots lining up from column
   4673   % to column.  It still won't often be perfect, because of the stretch
   4674   % we need before each entry, but it's better.
   4675   %
   4676   % No shrink because it confuses \balancecolumns.
   4677   \vskip 1.67\baselineskip plus .5\baselineskip
   4678   \leftline{\secbf #1}%
   4679   % Do our best not to break after the initial.
   4680   \nobreak
   4681   \vskip .33\baselineskip plus .1\baselineskip
   4682 }}
   4683 
   4684 % \entry typesets a paragraph consisting of the text (#1), dot leaders, and
   4685 % then page number (#2) flushed to the right margin.  It is used for index
   4686 % and table of contents entries.  The paragraph is indented by \leftskip.
   4687 %
   4688 % A straightforward implementation would start like this:
   4689 %	\def\entry#1#2{...
   4690 % But this freezes the catcodes in the argument, and can cause problems to
   4691 % @code, which sets - active.  This problem was fixed by a kludge---
   4692 % ``-'' was active throughout whole index, but this isn't really right.
   4693 %
   4694 % The right solution is to prevent \entry from swallowing the whole text.
   4695 %                                 --kasal, 21nov03
   4696 \def\entry{%
   4697   \begingroup
   4698     %
   4699     % Start a new paragraph if necessary, so our assignments below can't
   4700     % affect previous text.
   4701     \par
   4702     %
   4703     % Do not fill out the last line with white space.
   4704     \parfillskip = 0in
   4705     %
   4706     % No extra space above this paragraph.
   4707     \parskip = 0in
   4708     %
   4709     % Do not prefer a separate line ending with a hyphen to fewer lines.
   4710     \finalhyphendemerits = 0
   4711     %
   4712     % \hangindent is only relevant when the entry text and page number
   4713     % don't both fit on one line.  In that case, bob suggests starting the
   4714     % dots pretty far over on the line.  Unfortunately, a large
   4715     % indentation looks wrong when the entry text itself is broken across
   4716     % lines.  So we use a small indentation and put up with long leaders.
   4717     %
   4718     % \hangafter is reset to 1 (which is the value we want) at the start
   4719     % of each paragraph, so we need not do anything with that.
   4720     \hangindent = 2em
   4721     %
   4722     % When the entry text needs to be broken, just fill out the first line
   4723     % with blank space.
   4724     \rightskip = 0pt plus1fil
   4725     %
   4726     % A bit of stretch before each entry for the benefit of balancing
   4727     % columns.
   4728     \vskip 0pt plus1pt
   4729     %
   4730     % Swallow the left brace of the text (first parameter):
   4731     \afterassignment\doentry
   4732     \let\temp =
   4733 }
   4734 \def\doentry{%
   4735     \bgroup % Instead of the swallowed brace.
   4736       \noindent
   4737       \aftergroup\finishentry
   4738       % And now comes the text of the entry.
   4739 }
   4740 \def\finishentry#1{%
   4741     % #1 is the page number.
   4742     %
   4743     % The following is kludged to not output a line of dots in the index if
   4744     % there are no page numbers.  The next person who breaks this will be
   4745     % cursed by a Unix daemon.
   4746     \setbox\boxA = \hbox{#1}%
   4747     \ifdim\wd\boxA = 0pt
   4748       \ %
   4749     \else
   4750       %
   4751       % If we must, put the page number on a line of its own, and fill out
   4752       % this line with blank space.  (The \hfil is overwhelmed with the
   4753       % fill leaders glue in \indexdotfill if the page number does fit.)
   4754       \hfil\penalty50
   4755       \null\nobreak\indexdotfill % Have leaders before the page number.
   4756       %
   4757       % The `\ ' here is removed by the implicit \unskip that TeX does as
   4758       % part of (the primitive) \par.  Without it, a spurious underfull
   4759       % \hbox ensues.
   4760       \ifpdf
   4761 	\pdfgettoks#1.%
   4762 	\ \the\toksA
   4763       \else
   4764 	\ #1%
   4765       \fi
   4766     \fi
   4767     \par
   4768   \endgroup
   4769 }
   4770 
   4771 % Like plain.tex's \dotfill, except uses up at least 1 em.
   4772 \def\indexdotfill{\cleaders
   4773   \hbox{$\mathsurround=0pt \mkern1.5mu.\mkern1.5mu$}\hskip 1em plus 1fill}
   4774 
   4775 \def\primary #1{\line{#1\hfil}}
   4776 
   4777 \newskip\secondaryindent \secondaryindent=0.5cm
   4778 \def\secondary#1#2{{%
   4779   \parfillskip=0in
   4780   \parskip=0in
   4781   \hangindent=1in
   4782   \hangafter=1
   4783   \noindent\hskip\secondaryindent\hbox{#1}\indexdotfill
   4784   \ifpdf
   4785     \pdfgettoks#2.\ \the\toksA % The page number ends the paragraph.
   4786   \else
   4787     #2
   4788   \fi
   4789   \par
   4790 }}
   4791 
   4792 % Define two-column mode, which we use to typeset indexes.
   4793 % Adapted from the TeXbook, page 416, which is to say,
   4794 % the manmac.tex format used to print the TeXbook itself.
   4795 \catcode`\@=11
   4796 
   4797 \newbox\partialpage
   4798 \newdimen\doublecolumnhsize
   4799 
   4800 \def\begindoublecolumns{\begingroup % ended by \enddoublecolumns
   4801   % Grab any single-column material above us.
   4802   \output = {%
   4803     %
   4804     % Here is a possibility not foreseen in manmac: if we accumulate a
   4805     % whole lot of material, we might end up calling this \output
   4806     % routine twice in a row (see the doublecol-lose test, which is
   4807     % essentially a couple of indexes with @setchapternewpage off).  In
   4808     % that case we just ship out what is in \partialpage with the normal
   4809     % output routine.  Generally, \partialpage will be empty when this
   4810     % runs and this will be a no-op.  See the indexspread.tex test case.
   4811     \ifvoid\partialpage \else
   4812       \onepageout{\pagecontents\partialpage}%
   4813     \fi
   4814     %
   4815     \global\setbox\partialpage = \vbox{%
   4816       % Unvbox the main output page.
   4817       \unvbox\PAGE
   4818       \kern-\topskip \kern\baselineskip
   4819     }%
   4820   }%
   4821   \eject % run that output routine to set \partialpage
   4822   %
   4823   % Use the double-column output routine for subsequent pages.
   4824   \output = {\doublecolumnout}%
   4825   %
   4826   % Change the page size parameters.  We could do this once outside this
   4827   % routine, in each of @smallbook, @afourpaper, and the default 8.5x11
   4828   % format, but then we repeat the same computation.  Repeating a couple
   4829   % of assignments once per index is clearly meaningless for the
   4830   % execution time, so we may as well do it in one place.
   4831   %
   4832   % First we halve the line length, less a little for the gutter between
   4833   % the columns.  We compute the gutter based on the line length, so it
   4834   % changes automatically with the paper format.  The magic constant
   4835   % below is chosen so that the gutter has the same value (well, +-<1pt)
   4836   % as it did when we hard-coded it.
   4837   %
   4838   % We put the result in a separate register, \doublecolumhsize, so we
   4839   % can restore it in \pagesofar, after \hsize itself has (potentially)
   4840   % been clobbered.
   4841   %
   4842   \doublecolumnhsize = \hsize
   4843     \advance\doublecolumnhsize by -.04154\hsize
   4844     \divide\doublecolumnhsize by 2
   4845   \hsize = \doublecolumnhsize
   4846   %
   4847   % Double the \vsize as well.  (We don't need a separate register here,
   4848   % since nobody clobbers \vsize.)
   4849   \vsize = 2\vsize
   4850 }
   4851 
   4852 % The double-column output routine for all double-column pages except
   4853 % the last.
   4854 %
   4855 \def\doublecolumnout{%
   4856   \splittopskip=\topskip \splitmaxdepth=\maxdepth
   4857   % Get the available space for the double columns -- the normal
   4858   % (undoubled) page height minus any material left over from the
   4859   % previous page.
   4860   \dimen@ = \vsize
   4861   \divide\dimen@ by 2
   4862   \advance\dimen@ by -\ht\partialpage
   4863   %
   4864   % box0 will be the left-hand column, box2 the right.
   4865   \setbox0=\vsplit255 to\dimen@ \setbox2=\vsplit255 to\dimen@
   4866   \onepageout\pagesofar
   4867   \unvbox255
   4868   \penalty\outputpenalty
   4869 }
   4870 %
   4871 % Re-output the contents of the output page -- any previous material,
   4872 % followed by the two boxes we just split, in box0 and box2.
   4873 \def\pagesofar{%
   4874   \unvbox\partialpage
   4875   %
   4876   \hsize = \doublecolumnhsize
   4877   \wd0=\hsize \wd2=\hsize
   4878   \hbox to\pagewidth{\box0\hfil\box2}%
   4879 }
   4880 %
   4881 % All done with double columns.
   4882 \def\enddoublecolumns{%
   4883   % The following penalty ensures that the page builder is exercised
   4884   % _before_ we change the output routine.  This is necessary in the
   4885   % following situation:
   4886   %
   4887   % The last section of the index consists only of a single entry.
   4888   % Before this section, \pagetotal is less than \pagegoal, so no
   4889   % break occurs before the last section starts.  However, the last
   4890   % section, consisting of \initial and the single \entry, does not
   4891   % fit on the page and has to be broken off.  Without the following
   4892   % penalty the page builder will not be exercised until \eject
   4893   % below, and by that time we'll already have changed the output
   4894   % routine to the \balancecolumns version, so the next-to-last
   4895   % double-column page will be processed with \balancecolumns, which
   4896   % is wrong:  The two columns will go to the main vertical list, with
   4897   % the broken-off section in the recent contributions.  As soon as
   4898   % the output routine finishes, TeX starts reconsidering the page
   4899   % break.  The two columns and the broken-off section both fit on the
   4900   % page, because the two columns now take up only half of the page
   4901   % goal.  When TeX sees \eject from below which follows the final
   4902   % section, it invokes the new output routine that we've set after
   4903   % \balancecolumns below; \onepageout will try to fit the two columns
   4904   % and the final section into the vbox of \pageheight (see
   4905   % \pagebody), causing an overfull box.
   4906   %
   4907   % Note that glue won't work here, because glue does not exercise the
   4908   % page builder, unlike penalties (see The TeXbook, pp. 280-281).
   4909   \penalty0
   4910   %
   4911   \output = {%
   4912     % Split the last of the double-column material.  Leave it on the
   4913     % current page, no automatic page break.
   4914     \balancecolumns
   4915     %
   4916     % If we end up splitting too much material for the current page,
   4917     % though, there will be another page break right after this \output
   4918     % invocation ends.  Having called \balancecolumns once, we do not
   4919     % want to call it again.  Therefore, reset \output to its normal
   4920     % definition right away.  (We hope \balancecolumns will never be
   4921     % called on to balance too much material, but if it is, this makes
   4922     % the output somewhat more palatable.)
   4923     \global\output = {\onepageout{\pagecontents\PAGE}}%
   4924   }%
   4925   \eject
   4926   \endgroup % started in \begindoublecolumns
   4927   %
   4928   % \pagegoal was set to the doubled \vsize above, since we restarted
   4929   % the current page.  We're now back to normal single-column
   4930   % typesetting, so reset \pagegoal to the normal \vsize (after the
   4931   % \endgroup where \vsize got restored).
   4932   \pagegoal = \vsize
   4933 }
   4934 %
   4935 % Called at the end of the double column material.
   4936 \def\balancecolumns{%
   4937   \setbox0 = \vbox{\unvbox255}% like \box255 but more efficient, see p.120.
   4938   \dimen@ = \ht0
   4939   \advance\dimen@ by \topskip
   4940   \advance\dimen@ by-\baselineskip
   4941   \divide\dimen@ by 2 % target to split to
   4942   %debug\message{final 2-column material height=\the\ht0, target=\the\dimen@.}%
   4943   \splittopskip = \topskip
   4944   % Loop until we get a decent breakpoint.
   4945   {%
   4946     \vbadness = 10000
   4947     \loop
   4948       \global\setbox3 = \copy0
   4949       \global\setbox1 = \vsplit3 to \dimen@
   4950     \ifdim\ht3>\dimen@
   4951       \global\advance\dimen@ by 1pt
   4952     \repeat
   4953   }%
   4954   %debug\message{split to \the\dimen@, column heights: \the\ht1, \the\ht3.}%
   4955   \setbox0=\vbox to\dimen@{\unvbox1}%
   4956   \setbox2=\vbox to\dimen@{\unvbox3}%
   4957   %
   4958   \pagesofar
   4959 }
   4960 \catcode`\@ = \other
   4961 
   4962 
   4963 \message{sectioning,}
   4964 % Chapters, sections, etc.
   4965 
   4966 % \unnumberedno is an oxymoron, of course.  But we count the unnumbered
   4967 % sections so that we can refer to them unambiguously in the pdf
   4968 % outlines by their "section number".  We avoid collisions with chapter
   4969 % numbers by starting them at 10000.  (If a document ever has 10000
   4970 % chapters, we're in trouble anyway, I'm sure.)
   4971 \newcount\unnumberedno \unnumberedno = 10000
   4972 \newcount\chapno
   4973 \newcount\secno        \secno=0
   4974 \newcount\subsecno     \subsecno=0
   4975 \newcount\subsubsecno  \subsubsecno=0
   4976 
   4977 % This counter is funny since it counts through charcodes of letters A, B, ...
   4978 \newcount\appendixno  \appendixno = `\@
   4979 %
   4980 % \def\appendixletter{\char\the\appendixno}
   4981 % We do the following ugly conditional instead of the above simple
   4982 % construct for the sake of pdftex, which needs the actual
   4983 % letter in the expansion, not just typeset.
   4984 %
   4985 \def\appendixletter{%
   4986   \ifnum\appendixno=`A A%
   4987   \else\ifnum\appendixno=`B B%
   4988   \else\ifnum\appendixno=`C C%
   4989   \else\ifnum\appendixno=`D D%
   4990   \else\ifnum\appendixno=`E E%
   4991   \else\ifnum\appendixno=`F F%
   4992   \else\ifnum\appendixno=`G G%
   4993   \else\ifnum\appendixno=`H H%
   4994   \else\ifnum\appendixno=`I I%
   4995   \else\ifnum\appendixno=`J J%
   4996   \else\ifnum\appendixno=`K K%
   4997   \else\ifnum\appendixno=`L L%
   4998   \else\ifnum\appendixno=`M M%
   4999   \else\ifnum\appendixno=`N N%
   5000   \else\ifnum\appendixno=`O O%
   5001   \else\ifnum\appendixno=`P P%
   5002   \else\ifnum\appendixno=`Q Q%
   5003   \else\ifnum\appendixno=`R R%
   5004   \else\ifnum\appendixno=`S S%
   5005   \else\ifnum\appendixno=`T T%
   5006   \else\ifnum\appendixno=`U U%
   5007   \else\ifnum\appendixno=`V V%
   5008   \else\ifnum\appendixno=`W W%
   5009   \else\ifnum\appendixno=`X X%
   5010   \else\ifnum\appendixno=`Y Y%
   5011   \else\ifnum\appendixno=`Z Z%
   5012   % The \the is necessary, despite appearances, because \appendixletter is
   5013   % expanded while writing the .toc file.  \char\appendixno is not
   5014   % expandable, thus it is written literally, thus all appendixes come out
   5015   % with the same letter (or @) in the toc without it.
   5016   \else\char\the\appendixno
   5017   \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
   5018   \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi}
   5019 
   5020 % Each @chapter defines these (using marks) as the number+name, number
   5021 % and name of the chapter.  Page headings and footings can use
   5022 % these.  @section does likewise.
   5023 \def\thischapter{}
   5024 \def\thischapternum{}
   5025 \def\thischaptername{}
   5026 \def\thissection{}
   5027 \def\thissectionnum{}
   5028 \def\thissectionname{}
   5029 
   5030 \newcount\absseclevel % used to calculate proper heading level
   5031 \newcount\secbase\secbase=0 % @raisesections/@lowersections modify this count
   5032 
   5033 % @raisesections: treat @section as chapter, @subsection as section, etc.
   5034 \def\raisesections{\global\advance\secbase by -1}
   5035 \let\up=\raisesections % original BFox name
   5036 
   5037 % @lowersections: treat @chapter as section, @section as subsection, etc.
   5038 \def\lowersections{\global\advance\secbase by 1}
   5039 \let\down=\lowersections % original BFox name
   5040 
   5041 % we only have subsub.
   5042 \chardef\maxseclevel = 3
   5043 %
   5044 % A numbered section within an unnumbered changes to unnumbered too.
   5045 % To achive this, remember the "biggest" unnum. sec. we are currently in:
   5046 \chardef\unmlevel = \maxseclevel
   5047 %
   5048 % Trace whether the current chapter is an appendix or not:
   5049 % \chapheadtype is "N" or "A", unnumbered chapters are ignored.
   5050 \def\chapheadtype{N}
   5051 
   5052 % Choose a heading macro
   5053 % #1 is heading type
   5054 % #2 is heading level
   5055 % #3 is text for heading
   5056 \def\genhead#1#2#3{%
   5057   % Compute the abs. sec. level:
   5058   \absseclevel=#2
   5059   \advance\absseclevel by \secbase
   5060   % Make sure \absseclevel doesn't fall outside the range:
   5061   \ifnum \absseclevel < 0
   5062     \absseclevel = 0
   5063   \else
   5064     \ifnum \absseclevel > 3
   5065       \absseclevel = 3
   5066     \fi
   5067   \fi
   5068   % The heading type:
   5069   \def\headtype{#1}%
   5070   \if \headtype U%
   5071     \ifnum \absseclevel < \unmlevel
   5072       \chardef\unmlevel = \absseclevel
   5073     \fi
   5074   \else
   5075     % Check for appendix sections:
   5076     \ifnum \absseclevel = 0
   5077       \edef\chapheadtype{\headtype}%
   5078     \else
   5079       \if \headtype A\if \chapheadtype N%
   5080 	\errmessage{@appendix... within a non-appendix chapter}%
   5081       \fi\fi
   5082     \fi
   5083     % Check for numbered within unnumbered:
   5084     \ifnum \absseclevel > \unmlevel
   5085       \def\headtype{U}%
   5086     \else
   5087       \chardef\unmlevel = 3
   5088     \fi
   5089   \fi
   5090   % Now print the heading:
   5091   \if \headtype U%
   5092     \ifcase\absseclevel
   5093 	\unnumberedzzz{#3}%
   5094     \or \unnumberedseczzz{#3}%
   5095     \or \unnumberedsubseczzz{#3}%
   5096     \or \unnumberedsubsubseczzz{#3}%
   5097     \fi
   5098   \else
   5099     \if \headtype A%
   5100       \ifcase\absseclevel
   5101 	  \appendixzzz{#3}%
   5102       \or \appendixsectionzzz{#3}%
   5103       \or \appendixsubseczzz{#3}%
   5104       \or \appendixsubsubseczzz{#3}%
   5105       \fi
   5106     \else
   5107       \ifcase\absseclevel
   5108 	  \chapterzzz{#3}%
   5109       \or \seczzz{#3}%
   5110       \or \numberedsubseczzz{#3}%
   5111       \or \numberedsubsubseczzz{#3}%
   5112       \fi
   5113     \fi
   5114   \fi
   5115   \suppressfirstparagraphindent
   5116 }
   5117 
   5118 % an interface:
   5119 \def\numhead{\genhead N}
   5120 \def\apphead{\genhead A}
   5121 \def\unnmhead{\genhead U}
   5122 
   5123 % @chapter, @appendix, @unnumbered.  Increment top-level counter, reset
   5124 % all lower-level sectioning counters to zero.
   5125 %
   5126 % Also set \chaplevelprefix, which we prepend to @float sequence numbers
   5127 % (e.g., figures), q.v.  By default (before any chapter), that is empty.
   5128 \let\chaplevelprefix = \empty
   5129 %
   5130 \outer\parseargdef\chapter{\numhead0{#1}} % normally numhead0 calls chapterzzz
   5131 \def\chapterzzz#1{%
   5132   % section resetting is \global in case the chapter is in a group, such
   5133   % as an @include file.
   5134   \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
   5135     \global\advance\chapno by 1
   5136   %
   5137   % Used for \float.
   5138   \gdef\chaplevelprefix{\the\chapno.}%
   5139   \resetallfloatnos
   5140   %
   5141   % \putwordChapter can contain complex things in translations.
   5142   \toks0=\expandafter{\putwordChapter}%
   5143   \message{\the\toks0 \space \the\chapno}%
   5144   %
   5145   % Write the actual heading.
   5146   \chapmacro{#1}{Ynumbered}{\the\chapno}%
   5147   %
   5148   % So @section and the like are numbered underneath this chapter.
   5149   \global\let\section = \numberedsec
   5150   \global\let\subsection = \numberedsubsec
   5151   \global\let\subsubsection = \numberedsubsubsec
   5152 }
   5153 
   5154 \outer\parseargdef\appendix{\apphead0{#1}} % normally calls appendixzzz
   5155 %
   5156 \def\appendixzzz#1{%
   5157   \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
   5158     \global\advance\appendixno by 1
   5159   \gdef\chaplevelprefix{\appendixletter.}%
   5160   \resetallfloatnos
   5161   %
   5162   % \putwordAppendix can contain complex things in translations.
   5163   \toks0=\expandafter{\putwordAppendix}%
   5164   \message{\the\toks0 \space \appendixletter}%
   5165   %
   5166   \chapmacro{#1}{Yappendix}{\appendixletter}%
   5167   %
   5168   \global\let\section = \appendixsec
   5169   \global\let\subsection = \appendixsubsec
   5170   \global\let\subsubsection = \appendixsubsubsec
   5171 }
   5172 
   5173 \outer\parseargdef\unnumbered{\unnmhead0{#1}} % normally unnmhead0 calls unnumberedzzz
   5174 \def\unnumberedzzz#1{%
   5175   \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
   5176     \global\advance\unnumberedno by 1
   5177   %
   5178   % Since an unnumbered has no number, no prefix for figures.
   5179   \global\let\chaplevelprefix = \empty
   5180   \resetallfloatnos
   5181   %
   5182   % This used to be simply \message{#1}, but TeX fully expands the
   5183   % argument to \message.  Therefore, if #1 contained @-commands, TeX
   5184   % expanded them.  For example, in `@unnumbered The @cite{Book}', TeX
   5185   % expanded @cite (which turns out to cause errors because \cite is meant
   5186   % to be executed, not expanded).
   5187   %
   5188   % Anyway, we don't want the fully-expanded definition of @cite to appear
   5189   % as a result of the \message, we just want `@cite' itself.  We use
   5190   % \the<toks register> to achieve this: TeX expands \the<toks> only once,
   5191   % simply yielding the contents of <toks register>.  (We also do this for
   5192   % the toc entries.)
   5193   \toks0 = {#1}%
   5194   \message{(\the\toks0)}%
   5195   %
   5196   \chapmacro{#1}{Ynothing}{\the\unnumberedno}%
   5197   %
   5198   \global\let\section = \unnumberedsec
   5199   \global\let\subsection = \unnumberedsubsec
   5200   \global\let\subsubsection = \unnumberedsubsubsec
   5201 }
   5202 
   5203 % @centerchap is like @unnumbered, but the heading is centered.
   5204 \outer\parseargdef\centerchap{%
   5205   % Well, we could do the following in a group, but that would break
   5206   % an assumption that \chapmacro is called at the outermost level.
   5207   % Thus we are safer this way:		--kasal, 24feb04
   5208   \let\centerparametersmaybe = \centerparameters
   5209   \unnmhead0{#1}%
   5210   \let\centerparametersmaybe = \relax
   5211 }
   5212 
   5213 % @top is like @unnumbered.
   5214 \let\top\unnumbered
   5215 
   5216 % Sections.
   5217 \outer\parseargdef\numberedsec{\numhead1{#1}} % normally calls seczzz
   5218 \def\seczzz#1{%
   5219   \global\subsecno=0 \global\subsubsecno=0  \global\advance\secno by 1
   5220   \sectionheading{#1}{sec}{Ynumbered}{\the\chapno.\the\secno}%
   5221 }
   5222 
   5223 \outer\parseargdef\appendixsection{\apphead1{#1}} % normally calls appendixsectionzzz
   5224 \def\appendixsectionzzz#1{%
   5225   \global\subsecno=0 \global\subsubsecno=0  \global\advance\secno by 1
   5226   \sectionheading{#1}{sec}{Yappendix}{\appendixletter.\the\secno}%
   5227 }
   5228 \let\appendixsec\appendixsection
   5229 
   5230 \outer\parseargdef\unnumberedsec{\unnmhead1{#1}} % normally calls unnumberedseczzz
   5231 \def\unnumberedseczzz#1{%
   5232   \global\subsecno=0 \global\subsubsecno=0  \global\advance\secno by 1
   5233   \sectionheading{#1}{sec}{Ynothing}{\the\unnumberedno.\the\secno}%
   5234 }
   5235 
   5236 % Subsections.
   5237 \outer\parseargdef\numberedsubsec{\numhead2{#1}} % normally calls numberedsubseczzz
   5238 \def\numberedsubseczzz#1{%
   5239   \global\subsubsecno=0  \global\advance\subsecno by 1
   5240   \sectionheading{#1}{subsec}{Ynumbered}{\the\chapno.\the\secno.\the\subsecno}%
   5241 }
   5242 
   5243 \outer\parseargdef\appendixsubsec{\apphead2{#1}} % normally calls appendixsubseczzz
   5244 \def\appendixsubseczzz#1{%
   5245   \global\subsubsecno=0  \global\advance\subsecno by 1
   5246   \sectionheading{#1}{subsec}{Yappendix}%
   5247                  {\appendixletter.\the\secno.\the\subsecno}%
   5248 }
   5249 
   5250 \outer\parseargdef\unnumberedsubsec{\unnmhead2{#1}} %normally calls unnumberedsubseczzz
   5251 \def\unnumberedsubseczzz#1{%
   5252   \global\subsubsecno=0  \global\advance\subsecno by 1
   5253   \sectionheading{#1}{subsec}{Ynothing}%
   5254                  {\the\unnumberedno.\the\secno.\the\subsecno}%
   5255 }
   5256 
   5257 % Subsubsections.
   5258 \outer\parseargdef\numberedsubsubsec{\numhead3{#1}} % normally numberedsubsubseczzz
   5259 \def\numberedsubsubseczzz#1{%
   5260   \global\advance\subsubsecno by 1
   5261   \sectionheading{#1}{subsubsec}{Ynumbered}%
   5262                  {\the\chapno.\the\secno.\the\subsecno.\the\subsubsecno}%
   5263 }
   5264 
   5265 \outer\parseargdef\appendixsubsubsec{\apphead3{#1}} % normally appendixsubsubseczzz
   5266 \def\appendixsubsubseczzz#1{%
   5267   \global\advance\subsubsecno by 1
   5268   \sectionheading{#1}{subsubsec}{Yappendix}%
   5269                  {\appendixletter.\the\secno.\the\subsecno.\the\subsubsecno}%
   5270 }
   5271 
   5272 \outer\parseargdef\unnumberedsubsubsec{\unnmhead3{#1}} %normally unnumberedsubsubseczzz
   5273 \def\unnumberedsubsubseczzz#1{%
   5274   \global\advance\subsubsecno by 1
   5275   \sectionheading{#1}{subsubsec}{Ynothing}%
   5276                  {\the\unnumberedno.\the\secno.\the\subsecno.\the\subsubsecno}%
   5277 }
   5278 
   5279 % These macros control what the section commands do, according
   5280 % to what kind of chapter we are in (ordinary, appendix, or unnumbered).
   5281 % Define them by default for a numbered chapter.
   5282 \let\section = \numberedsec
   5283 \let\subsection = \numberedsubsec
   5284 \let\subsubsection = \numberedsubsubsec
   5285 
   5286 % Define @majorheading, @heading and @subheading
   5287 
   5288 % NOTE on use of \vbox for chapter headings, section headings, and such:
   5289 %       1) We use \vbox rather than the earlier \line to permit
   5290 %          overlong headings to fold.
   5291 %       2) \hyphenpenalty is set to 10000 because hyphenation in a
   5292 %          heading is obnoxious; this forbids it.
   5293 %       3) Likewise, headings look best if no \parindent is used, and
   5294 %          if justification is not attempted.  Hence \raggedright.
   5295 
   5296 \def\majorheading{%
   5297   {\advance\chapheadingskip by 10pt \chapbreak }%
   5298   \parsearg\chapheadingzzz
   5299 }
   5300 
   5301 \def\chapheading{\chapbreak \parsearg\chapheadingzzz}
   5302 \def\chapheadingzzz#1{%
   5303   {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
   5304                     \parindent=0pt\ptexraggedright
   5305                     \rmisbold #1\hfill}}%
   5306   \bigskip \par\penalty 200\relax
   5307   \suppressfirstparagraphindent
   5308 }
   5309 
   5310 % @heading, @subheading, @subsubheading.
   5311 \parseargdef\heading{\sectionheading{#1}{sec}{Yomitfromtoc}{}
   5312   \suppressfirstparagraphindent}
   5313 \parseargdef\subheading{\sectionheading{#1}{subsec}{Yomitfromtoc}{}
   5314   \suppressfirstparagraphindent}
   5315 \parseargdef\subsubheading{\sectionheading{#1}{subsubsec}{Yomitfromtoc}{}
   5316   \suppressfirstparagraphindent}
   5317 
   5318 % These macros generate a chapter, section, etc. heading only
   5319 % (including whitespace, linebreaking, etc. around it),
   5320 % given all the information in convenient, parsed form.
   5321 
   5322 %%% Args are the skip and penalty (usually negative)
   5323 \def\dobreak#1#2{\par\ifdim\lastskip<#1\removelastskip\penalty#2\vskip#1\fi}
   5324 
   5325 %%% Define plain chapter starts, and page on/off switching for it
   5326 % Parameter controlling skip before chapter headings (if needed)
   5327 
   5328 \newskip\chapheadingskip
   5329 
   5330 \def\chapbreak{\dobreak \chapheadingskip {-4000}}
   5331 \def\chappager{\par\vfill\supereject}
   5332 % Because \domark is called before \chapoddpage, the filler page will
   5333 % get the headings for the next chapter, which is wrong.  But we don't
   5334 % care -- we just disable all headings on the filler page.
   5335 \def\chapoddpage{%
   5336   \chappager
   5337   \ifodd\pageno \else
   5338     \begingroup
   5339       \evenheadline={\hfil}\evenfootline={\hfil}%
   5340       \oddheadline={\hfil}\oddfootline={\hfil}%
   5341       \hbox to 0pt{}%
   5342       \chappager
   5343     \endgroup
   5344   \fi
   5345 }
   5346 
   5347 \def\setchapternewpage #1 {\csname CHAPPAG#1\endcsname}
   5348 
   5349 \def\CHAPPAGoff{%
   5350 \global\let\contentsalignmacro = \chappager
   5351 \global\let\pchapsepmacro=\chapbreak
   5352 \global\let\pagealignmacro=\chappager}
   5353 
   5354 \def\CHAPPAGon{%
   5355 \global\let\contentsalignmacro = \chappager
   5356 \global\let\pchapsepmacro=\chappager
   5357 \global\let\pagealignmacro=\chappager
   5358 \global\def\HEADINGSon{\HEADINGSsingle}}
   5359 
   5360 \def\CHAPPAGodd{%
   5361 \global\let\contentsalignmacro = \chapoddpage
   5362 \global\let\pchapsepmacro=\chapoddpage
   5363 \global\let\pagealignmacro=\chapoddpage
   5364 \global\def\HEADINGSon{\HEADINGSdouble}}
   5365 
   5366 \CHAPPAGon
   5367 
   5368 % Chapter opening.
   5369 %
   5370 % #1 is the text, #2 is the section type (Ynumbered, Ynothing,
   5371 % Yappendix, Yomitfromtoc), #3 the chapter number.
   5372 %
   5373 % To test against our argument.
   5374 \def\Ynothingkeyword{Ynothing}
   5375 \def\Yomitfromtockeyword{Yomitfromtoc}
   5376 \def\Yappendixkeyword{Yappendix}
   5377 %
   5378 \def\chapmacro#1#2#3{%
   5379   % Insert the first mark before the heading break (see notes for \domark).
   5380   \let\prevchapterdefs=\lastchapterdefs
   5381   \let\prevsectiondefs=\lastsectiondefs
   5382   \gdef\lastsectiondefs{\gdef\thissectionname{}\gdef\thissectionnum{}%
   5383                         \gdef\thissection{}}%
   5384   %
   5385   \def\temptype{#2}%
   5386   \ifx\temptype\Ynothingkeyword
   5387     \gdef\lastchapterdefs{\gdef\thischaptername{#1}\gdef\thischapternum{}%
   5388                           \gdef\thischapter{\thischaptername}}%
   5389   \else\ifx\temptype\Yomitfromtockeyword
   5390     \gdef\lastchapterdefs{\gdef\thischaptername{#1}\gdef\thischapternum{}%
   5391                           \gdef\thischapter{}}%
   5392   \else\ifx\temptype\Yappendixkeyword
   5393     \toks0={#1}%
   5394     \xdef\lastchapterdefs{%
   5395       \gdef\noexpand\thischaptername{\the\toks0}%
   5396       \gdef\noexpand\thischapternum{\appendixletter}%
   5397       % \noexpand\putwordAppendix avoids expanding indigestible
   5398       % commands in some of the translations.
   5399       \gdef\noexpand\thischapter{\noexpand\putwordAppendix{}
   5400                                  \noexpand\thischapternum:
   5401                                  \noexpand\thischaptername}%
   5402     }%
   5403   \else
   5404     \toks0={#1}%
   5405     \xdef\lastchapterdefs{%
   5406       \gdef\noexpand\thischaptername{\the\toks0}%
   5407       \gdef\noexpand\thischapternum{\the\chapno}%
   5408       % \noexpand\putwordChapter avoids expanding indigestible
   5409       % commands in some of the translations.
   5410       \gdef\noexpand\thischapter{\noexpand\putwordChapter{}
   5411                                  \noexpand\thischapternum:
   5412                                  \noexpand\thischaptername}%
   5413     }%
   5414   \fi\fi\fi
   5415   %
   5416   % Output the mark.  Pass it through \safewhatsit, to take care of
   5417   % the preceding space.
   5418   \safewhatsit\domark
   5419   %
   5420   % Insert the chapter heading break.
   5421   \pchapsepmacro
   5422   %
   5423   % Now the second mark, after the heading break.  No break points
   5424   % between here and the heading.
   5425   \let\prevchapterdefs=\lastchapterdefs
   5426   \let\prevsectiondefs=\lastsectiondefs
   5427   \domark
   5428   %
   5429   {%
   5430     \chapfonts \rmisbold
   5431     %
   5432     % Have to define \lastsection before calling \donoderef, because the
   5433     % xref code eventually uses it.  On the other hand, it has to be called
   5434     % after \pchapsepmacro, or the headline will change too soon.
   5435     \gdef\lastsection{#1}%
   5436     %
   5437     % Only insert the separating space if we have a chapter/appendix
   5438     % number, and don't print the unnumbered ``number''.
   5439     \ifx\temptype\Ynothingkeyword
   5440       \setbox0 = \hbox{}%
   5441       \def\toctype{unnchap}%
   5442     \else\ifx\temptype\Yomitfromtockeyword
   5443       \setbox0 = \hbox{}% contents like unnumbered, but no toc entry
   5444       \def\toctype{omit}%
   5445     \else\ifx\temptype\Yappendixkeyword
   5446       \setbox0 = \hbox{\putwordAppendix{} #3\enspace}%
   5447       \def\toctype{app}%
   5448     \else
   5449       \setbox0 = \hbox{#3\enspace}%
   5450       \def\toctype{numchap}%
   5451     \fi\fi\fi
   5452     %
   5453     % Write the toc entry for this chapter.  Must come before the
   5454     % \donoderef, because we include the current node name in the toc
   5455     % entry, and \donoderef resets it to empty.
   5456     \writetocentry{\toctype}{#1}{#3}%
   5457     %
   5458     % For pdftex, we have to write out the node definition (aka, make
   5459     % the pdfdest) after any page break, but before the actual text has
   5460     % been typeset.  If the destination for the pdf outline is after the
   5461     % text, then jumping from the outline may wind up with the text not
   5462     % being visible, for instance under high magnification.
   5463     \donoderef{#2}%
   5464     %
   5465     % Typeset the actual heading.
   5466     \nobreak % Avoid page breaks at the interline glue.
   5467     \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \ptexraggedright
   5468           \hangindent=\wd0 \centerparametersmaybe
   5469           \unhbox0 #1\par}%
   5470   }%
   5471   \nobreak\bigskip % no page break after a chapter title
   5472   \nobreak
   5473 }
   5474 
   5475 % @centerchap -- centered and unnumbered.
   5476 \let\centerparametersmaybe = \relax
   5477 \def\centerparameters{%
   5478   \advance\rightskip by 3\rightskip
   5479   \leftskip = \rightskip
   5480   \parfillskip = 0pt
   5481 }
   5482 
   5483 
   5484 % I don't think this chapter style is supported any more, so I'm not
   5485 % updating it with the new noderef stuff.  We'll see.  --karl, 11aug03.
   5486 %
   5487 \def\setchapterstyle #1 {\csname CHAPF#1\endcsname}
   5488 %
   5489 \def\unnchfopen #1{%
   5490 \chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
   5491                        \parindent=0pt\ptexraggedright
   5492                        \rmisbold #1\hfill}}\bigskip \par\nobreak
   5493 }
   5494 \def\chfopen #1#2{\chapoddpage {\chapfonts
   5495 \vbox to 3in{\vfil \hbox to\hsize{\hfil #2} \hbox to\hsize{\hfil #1} \vfil}}%
   5496 \par\penalty 5000 %
   5497 }
   5498 \def\centerchfopen #1{%
   5499 \chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
   5500                        \parindent=0pt
   5501                        \hfill {\rmisbold #1}\hfill}}\bigskip \par\nobreak
   5502 }
   5503 \def\CHAPFopen{%
   5504   \global\let\chapmacro=\chfopen
   5505   \global\let\centerchapmacro=\centerchfopen}
   5506 
   5507 
   5508 % Section titles.  These macros combine the section number parts and
   5509 % call the generic \sectionheading to do the printing.
   5510 %
   5511 \newskip\secheadingskip
   5512 \def\secheadingbreak{\dobreak \secheadingskip{-1000}}
   5513 
   5514 % Subsection titles.
   5515 \newskip\subsecheadingskip
   5516 \def\subsecheadingbreak{\dobreak \subsecheadingskip{-500}}
   5517 
   5518 % Subsubsection titles.
   5519 \def\subsubsecheadingskip{\subsecheadingskip}
   5520 \def\subsubsecheadingbreak{\subsecheadingbreak}
   5521 
   5522 
   5523 % Print any size, any type, section title.
   5524 %
   5525 % #1 is the text, #2 is the section level (sec/subsec/subsubsec), #3 is
   5526 % the section type for xrefs (Ynumbered, Ynothing, Yappendix), #4 is the
   5527 % section number.
   5528 %
   5529 \def\seckeyword{sec}
   5530 %
   5531 \def\sectionheading#1#2#3#4{%
   5532   {%
   5533     % Switch to the right set of fonts.
   5534     \csname #2fonts\endcsname \rmisbold
   5535     %
   5536     \def\sectionlevel{#2}%
   5537     \def\temptype{#3}%
   5538     %
   5539     % Insert first mark before the heading break (see notes for \domark).
   5540     \let\prevsectiondefs=\lastsectiondefs
   5541     \ifx\temptype\Ynothingkeyword
   5542       \ifx\sectionlevel\seckeyword
   5543         \gdef\lastsectiondefs{\gdef\thissectionname{#1}\gdef\thissectionnum{}%
   5544                               \gdef\thissection{\thissectionname}}%
   5545       \fi
   5546     \else\ifx\temptype\Yomitfromtockeyword
   5547       % Don't redefine \thissection.
   5548     \else\ifx\temptype\Yappendixkeyword
   5549       \ifx\sectionlevel\seckeyword
   5550         \toks0={#1}%
   5551         \xdef\lastsectiondefs{%
   5552           \gdef\noexpand\thissectionname{\the\toks0}%
   5553           \gdef\noexpand\thissectionnum{#4}%
   5554           % \noexpand\putwordSection avoids expanding indigestible
   5555           % commands in some of the translations.
   5556           \gdef\noexpand\thissection{\noexpand\putwordSection{}
   5557                                      \noexpand\thissectionnum:
   5558                                      \noexpand\thissectionname}%
   5559         }%
   5560       \fi
   5561     \else
   5562       \ifx\sectionlevel\seckeyword
   5563         \toks0={#1}%
   5564         \xdef\lastsectiondefs{%
   5565           \gdef\noexpand\thissectionname{\the\toks0}%
   5566           \gdef\noexpand\thissectionnum{#4}%
   5567           % \noexpand\putwordSection avoids expanding indigestible
   5568           % commands in some of the translations.
   5569           \gdef\noexpand\thissection{\noexpand\putwordSection{}
   5570                                      \noexpand\thissectionnum:
   5571                                      \noexpand\thissectionname}%
   5572         }%
   5573       \fi
   5574     \fi\fi\fi
   5575     %
   5576     % Go into vertical mode.  Usually we'll already be there, but we
   5577     % don't want the following whatsit to end up in a preceding paragraph
   5578     % if the document didn't happen to have a blank line.
   5579     \par
   5580     %
   5581     % Output the mark.  Pass it through \safewhatsit, to take care of
   5582     % the preceding space.
   5583     \safewhatsit\domark
   5584     %
   5585     % Insert space above the heading.
   5586     \csname #2headingbreak\endcsname
   5587     %
   5588     % Now the second mark, after the heading break.  No break points
   5589     % between here and the heading.
   5590     \let\prevsectiondefs=\lastsectiondefs
   5591     \domark
   5592     %
   5593     % Only insert the space after the number if we have a section number.
   5594     \ifx\temptype\Ynothingkeyword
   5595       \setbox0 = \hbox{}%
   5596       \def\toctype{unn}%
   5597       \gdef\lastsection{#1}%
   5598     \else\ifx\temptype\Yomitfromtockeyword
   5599       % for @headings -- no section number, don't include in toc,
   5600       % and don't redefine \lastsection.
   5601       \setbox0 = \hbox{}%
   5602       \def\toctype{omit}%
   5603       \let\sectionlevel=\empty
   5604     \else\ifx\temptype\Yappendixkeyword
   5605       \setbox0 = \hbox{#4\enspace}%
   5606       \def\toctype{app}%
   5607       \gdef\lastsection{#1}%
   5608     \else
   5609       \setbox0 = \hbox{#4\enspace}%
   5610       \def\toctype{num}%
   5611       \gdef\lastsection{#1}%
   5612     \fi\fi\fi
   5613     %
   5614     % Write the toc entry (before \donoderef).  See comments in \chapmacro.
   5615     \writetocentry{\toctype\sectionlevel}{#1}{#4}%
   5616     %
   5617     % Write the node reference (= pdf destination for pdftex).
   5618     % Again, see comments in \chapmacro.
   5619     \donoderef{#3}%
   5620     %
   5621     % Interline glue will be inserted when the vbox is completed.
   5622     % That glue will be a valid breakpoint for the page, since it'll be
   5623     % preceded by a whatsit (usually from the \donoderef, or from the
   5624     % \writetocentry if there was no node).  We don't want to allow that
   5625     % break, since then the whatsits could end up on page n while the
   5626     % section is on page n+1, thus toc/etc. are wrong.  Debian bug 276000.
   5627     \nobreak
   5628     %
   5629     % Output the actual section heading.
   5630     \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \ptexraggedright
   5631           \hangindent=\wd0  % zero if no section number
   5632           \unhbox0 #1}%
   5633   }%
   5634   % Add extra space after the heading -- half of whatever came above it.
   5635   % Don't allow stretch, though.
   5636   \kern .5 \csname #2headingskip\endcsname
   5637   %
   5638   % Do not let the kern be a potential breakpoint, as it would be if it
   5639   % was followed by glue.
   5640   \nobreak
   5641   %
   5642   % We'll almost certainly start a paragraph next, so don't let that
   5643   % glue accumulate.  (Not a breakpoint because it's preceded by a
   5644   % discardable item.)
   5645   \vskip-\parskip
   5646   %
   5647   % This is purely so the last item on the list is a known \penalty >
   5648   % 10000.  This is so \startdefun can avoid allowing breakpoints after
   5649   % section headings.  Otherwise, it would insert a valid breakpoint between:
   5650   %
   5651   %   @section sec-whatever
   5652   %   @deffn def-whatever
   5653   \penalty 10001
   5654 }
   5655 
   5656 
   5657 \message{toc,}
   5658 % Table of contents.
   5659 \newwrite\tocfile
   5660 
   5661 % Write an entry to the toc file, opening it if necessary.
   5662 % Called from @chapter, etc.
   5663 %
   5664 % Example usage: \writetocentry{sec}{Section Name}{\the\chapno.\the\secno}
   5665 % We append the current node name (if any) and page number as additional
   5666 % arguments for the \{chap,sec,...}entry macros which will eventually
   5667 % read this.  The node name is used in the pdf outlines as the
   5668 % destination to jump to.
   5669 %
   5670 % We open the .toc file for writing here instead of at @setfilename (or
   5671 % any other fixed time) so that @contents can be anywhere in the document.
   5672 % But if #1 is `omit', then we don't do anything.  This is used for the
   5673 % table of contents chapter openings themselves.
   5674 %
   5675 \newif\iftocfileopened
   5676 \def\omitkeyword{omit}%
   5677 %
   5678 \def\writetocentry#1#2#3{%
   5679   \edef\writetoctype{#1}%
   5680   \ifx\writetoctype\omitkeyword \else
   5681     \iftocfileopened\else
   5682       \immediate\openout\tocfile = \jobname.toc
   5683       \global\tocfileopenedtrue
   5684     \fi
   5685     %
   5686     \iflinks
   5687       {\atdummies
   5688        \edef\temp{%
   5689          \write\tocfile{@#1entry{#2}{#3}{\lastnode}{\noexpand\folio}}}%
   5690        \temp
   5691       }%
   5692     \fi
   5693   \fi
   5694   %
   5695   % Tell \shipout to create a pdf destination on each page, if we're
   5696   % writing pdf.  These are used in the table of contents.  We can't
   5697   % just write one on every page because the title pages are numbered
   5698   % 1 and 2 (the page numbers aren't printed), and so are the first
   5699   % two pages of the document.  Thus, we'd have two destinations named
   5700   % `1', and two named `2'.
   5701   \ifpdf \global\pdfmakepagedesttrue \fi
   5702 }
   5703 
   5704 
   5705 % These characters do not print properly in the Computer Modern roman
   5706 % fonts, so we must take special care.  This is more or less redundant
   5707 % with the Texinfo input format setup at the end of this file.
   5708 %
   5709 \def\activecatcodes{%
   5710   \catcode`\"=\active
   5711   \catcode`\$=\active
   5712   \catcode`\<=\active
   5713   \catcode`\>=\active
   5714   \catcode`\\=\active
   5715   \catcode`\^=\active
   5716   \catcode`\_=\active
   5717   \catcode`\|=\active
   5718   \catcode`\~=\active
   5719 }
   5720 
   5721 
   5722 % Read the toc file, which is essentially Texinfo input.
   5723 \def\readtocfile{%
   5724   \setupdatafile
   5725   \activecatcodes
   5726   \input \tocreadfilename
   5727 }
   5728 
   5729 \newskip\contentsrightmargin \contentsrightmargin=1in
   5730 \newcount\savepageno
   5731 \newcount\lastnegativepageno \lastnegativepageno = -1
   5732 
   5733 % Prepare to read what we've written to \tocfile.
   5734 %
   5735 \def\startcontents#1{%
   5736   % If @setchapternewpage on, and @headings double, the contents should
   5737   % start on an odd page, unlike chapters.  Thus, we maintain
   5738   % \contentsalignmacro in parallel with \pagealignmacro.
   5739   % From: Torbjorn Granlund <tege (a] matematik.su.se>
   5740   \contentsalignmacro
   5741   \immediate\closeout\tocfile
   5742   %
   5743   % Don't need to put `Contents' or `Short Contents' in the headline.
   5744   % It is abundantly clear what they are.
   5745   \chapmacro{#1}{Yomitfromtoc}{}%
   5746   %
   5747   \savepageno = \pageno
   5748   \begingroup                  % Set up to handle contents files properly.
   5749     \raggedbottom              % Worry more about breakpoints than the bottom.
   5750     \advance\hsize by -\contentsrightmargin % Don't use the full line length.
   5751     %
   5752     % Roman numerals for page numbers.
   5753     \ifnum \pageno>0 \global\pageno = \lastnegativepageno \fi
   5754 }
   5755 
   5756 % redefined for the two-volume lispref.  We always output on
   5757 % \jobname.toc even if this is redefined.
   5758 %
   5759 \def\tocreadfilename{\jobname.toc}
   5760 
   5761 % Normal (long) toc.
   5762 %
   5763 \def\contents{%
   5764   \startcontents{\putwordTOC}%
   5765     \openin 1 \tocreadfilename\space
   5766     \ifeof 1 \else
   5767       \readtocfile
   5768     \fi
   5769     \vfill \eject
   5770     \contentsalignmacro % in case @setchapternewpage odd is in effect
   5771     \ifeof 1 \else
   5772       \pdfmakeoutlines
   5773     \fi
   5774     \closein 1
   5775   \endgroup
   5776   \lastnegativepageno = \pageno
   5777   \global\pageno = \savepageno
   5778 }
   5779 
   5780 % And just the chapters.
   5781 \def\summarycontents{%
   5782   \startcontents{\putwordShortTOC}%
   5783     %
   5784     \let\numchapentry = \shortchapentry
   5785     \let\appentry = \shortchapentry
   5786     \let\unnchapentry = \shortunnchapentry
   5787     % We want a true roman here for the page numbers.
   5788     \secfonts
   5789     \let\rm=\shortcontrm \let\bf=\shortcontbf
   5790     \let\sl=\shortcontsl \let\tt=\shortconttt
   5791     \rm
   5792     \hyphenpenalty = 10000
   5793     \advance\baselineskip by 1pt % Open it up a little.
   5794     \def\numsecentry##1##2##3##4{}
   5795     \let\appsecentry = \numsecentry
   5796     \let\unnsecentry = \numsecentry
   5797     \let\numsubsecentry = \numsecentry
   5798     \let\appsubsecentry = \numsecentry
   5799     \let\unnsubsecentry = \numsecentry
   5800     \let\numsubsubsecentry = \numsecentry
   5801     \let\appsubsubsecentry = \numsecentry
   5802     \let\unnsubsubsecentry = \numsecentry
   5803     \openin 1 \tocreadfilename\space
   5804     \ifeof 1 \else
   5805       \readtocfile
   5806     \fi
   5807     \closein 1
   5808     \vfill \eject
   5809     \contentsalignmacro % in case @setchapternewpage odd is in effect
   5810   \endgroup
   5811   \lastnegativepageno = \pageno
   5812   \global\pageno = \savepageno
   5813 }
   5814 \let\shortcontents = \summarycontents
   5815 
   5816 % Typeset the label for a chapter or appendix for the short contents.
   5817 % The arg is, e.g., `A' for an appendix, or `3' for a chapter.
   5818 %
   5819 \def\shortchaplabel#1{%
   5820   % This space should be enough, since a single number is .5em, and the
   5821   % widest letter (M) is 1em, at least in the Computer Modern fonts.
   5822   % But use \hss just in case.
   5823   % (This space doesn't include the extra space that gets added after
   5824   % the label; that gets put in by \shortchapentry above.)
   5825   %
   5826   % We'd like to right-justify chapter numbers, but that looks strange
   5827   % with appendix letters.  And right-justifying numbers and
   5828   % left-justifying letters looks strange when there is less than 10
   5829   % chapters.  Have to read the whole toc once to know how many chapters
   5830   % there are before deciding ...
   5831   \hbox to 1em{#1\hss}%
   5832 }
   5833 
   5834 % These macros generate individual entries in the table of contents.
   5835 % The first argument is the chapter or section name.
   5836 % The last argument is the page number.
   5837 % The arguments in between are the chapter number, section number, ...
   5838 
   5839 % Chapters, in the main contents.
   5840 \def\numchapentry#1#2#3#4{\dochapentry{#2\labelspace#1}{#4}}
   5841 %
   5842 % Chapters, in the short toc.
   5843 % See comments in \dochapentry re vbox and related settings.
   5844 \def\shortchapentry#1#2#3#4{%
   5845   \tocentry{\shortchaplabel{#2}\labelspace #1}{\doshortpageno\bgroup#4\egroup}%
   5846 }
   5847 
   5848 % Appendices, in the main contents.
   5849 % Need the word Appendix, and a fixed-size box.
   5850 %
   5851 \def\appendixbox#1{%
   5852   % We use M since it's probably the widest letter.
   5853   \setbox0 = \hbox{\putwordAppendix{} M}%
   5854   \hbox to \wd0{\putwordAppendix{} #1\hss}}
   5855 %
   5856 \def\appentry#1#2#3#4{\dochapentry{\appendixbox{#2}\labelspace#1}{#4}}
   5857 
   5858 % Unnumbered chapters.
   5859 \def\unnchapentry#1#2#3#4{\dochapentry{#1}{#4}}
   5860 \def\shortunnchapentry#1#2#3#4{\tocentry{#1}{\doshortpageno\bgroup#4\egroup}}
   5861 
   5862 % Sections.
   5863 \def\numsecentry#1#2#3#4{\dosecentry{#2\labelspace#1}{#4}}
   5864 \let\appsecentry=\numsecentry
   5865 \def\unnsecentry#1#2#3#4{\dosecentry{#1}{#4}}
   5866 
   5867 % Subsections.
   5868 \def\numsubsecentry#1#2#3#4{\dosubsecentry{#2\labelspace#1}{#4}}
   5869 \let\appsubsecentry=\numsubsecentry
   5870 \def\unnsubsecentry#1#2#3#4{\dosubsecentry{#1}{#4}}
   5871 
   5872 % And subsubsections.
   5873 \def\numsubsubsecentry#1#2#3#4{\dosubsubsecentry{#2\labelspace#1}{#4}}
   5874 \let\appsubsubsecentry=\numsubsubsecentry
   5875 \def\unnsubsubsecentry#1#2#3#4{\dosubsubsecentry{#1}{#4}}
   5876 
   5877 % This parameter controls the indentation of the various levels.
   5878 % Same as \defaultparindent.
   5879 \newdimen\tocindent \tocindent = 15pt
   5880 
   5881 % Now for the actual typesetting. In all these, #1 is the text and #2 is the
   5882 % page number.
   5883 %
   5884 % If the toc has to be broken over pages, we want it to be at chapters
   5885 % if at all possible; hence the \penalty.
   5886 \def\dochapentry#1#2{%
   5887    \penalty-300 \vskip1\baselineskip plus.33\baselineskip minus.25\baselineskip
   5888    \begingroup
   5889      \chapentryfonts
   5890      \tocentry{#1}{\dopageno\bgroup#2\egroup}%
   5891    \endgroup
   5892    \nobreak\vskip .25\baselineskip plus.1\baselineskip
   5893 }
   5894 
   5895 \def\dosecentry#1#2{\begingroup
   5896   \secentryfonts \leftskip=\tocindent
   5897   \tocentry{#1}{\dopageno\bgroup#2\egroup}%
   5898 \endgroup}
   5899 
   5900 \def\dosubsecentry#1#2{\begingroup
   5901   \subsecentryfonts \leftskip=2\tocindent
   5902   \tocentry{#1}{\dopageno\bgroup#2\egroup}%
   5903 \endgroup}
   5904 
   5905 \def\dosubsubsecentry#1#2{\begingroup
   5906   \subsubsecentryfonts \leftskip=3\tocindent
   5907   \tocentry{#1}{\dopageno\bgroup#2\egroup}%
   5908 \endgroup}
   5909 
   5910 % We use the same \entry macro as for the index entries.
   5911 \let\tocentry = \entry
   5912 
   5913 % Space between chapter (or whatever) number and the title.
   5914 \def\labelspace{\hskip1em \relax}
   5915 
   5916 \def\dopageno#1{{\rm #1}}
   5917 \def\doshortpageno#1{{\rm #1}}
   5918 
   5919 \def\chapentryfonts{\secfonts \rm}
   5920 \def\secentryfonts{\textfonts}
   5921 \def\subsecentryfonts{\textfonts}
   5922 \def\subsubsecentryfonts{\textfonts}
   5923 
   5924 
   5925 \message{environments,}
   5926 % @foo ... @end foo.
   5927 
   5928 % @tex ... @end tex    escapes into raw Tex temporarily.
   5929 % One exception: @ is still an escape character, so that @end tex works.
   5930 % But \@ or @@ will get a plain tex @ character.
   5931 
   5932 \envdef\tex{%
   5933   \setupmarkupstyle{tex}%
   5934   \catcode `\\=0 \catcode `\{=1 \catcode `\}=2
   5935   \catcode `\$=3 \catcode `\&=4 \catcode `\#=6
   5936   \catcode `\^=7 \catcode `\_=8 \catcode `\~=\active \let~=\tie
   5937   \catcode `\%=14
   5938   \catcode `\+=\other
   5939   \catcode `\"=\other
   5940   \catcode `\|=\other
   5941   \catcode `\<=\other
   5942   \catcode `\>=\other
   5943   \catcode`\`=\other
   5944   \catcode`\'=\other
   5945   \escapechar=`\\
   5946   %
   5947   \let\b=\ptexb
   5948   \let\bullet=\ptexbullet
   5949   \let\c=\ptexc
   5950   \let\,=\ptexcomma
   5951   \let\.=\ptexdot
   5952   \let\dots=\ptexdots
   5953   \let\equiv=\ptexequiv
   5954   \let\!=\ptexexclam
   5955   \let\i=\ptexi
   5956   \let\indent=\ptexindent
   5957   \let\noindent=\ptexnoindent
   5958   \let\{=\ptexlbrace
   5959   \let\+=\tabalign
   5960   \let\}=\ptexrbrace
   5961   \let\/=\ptexslash
   5962   \let\*=\ptexstar
   5963   \let\t=\ptext
   5964   \expandafter \let\csname top\endcsname=\ptextop  % outer
   5965   \let\frenchspacing=\plainfrenchspacing
   5966   %
   5967   \def\endldots{\mathinner{\ldots\ldots\ldots\ldots}}%
   5968   \def\enddots{\relax\ifmmode\endldots\else$\mathsurround=0pt \endldots\,$\fi}%
   5969   \def\@{@}%
   5970 }
   5971 % There is no need to define \Etex.
   5972 
   5973 % Define @lisp ... @end lisp.
   5974 % @lisp environment forms a group so it can rebind things,
   5975 % including the definition of @end lisp (which normally is erroneous).
   5976 
   5977 % Amount to narrow the margins by for @lisp.
   5978 \newskip\lispnarrowing \lispnarrowing=0.4in
   5979 
   5980 % This is the definition that ^^M gets inside @lisp, @example, and other
   5981 % such environments.  \null is better than a space, since it doesn't
   5982 % have any width.
   5983 \def\lisppar{\null\endgraf}
   5984 
   5985 % This space is always present above and below environments.
   5986 \newskip\envskipamount \envskipamount = 0pt
   5987 
   5988 % Make spacing and below environment symmetrical.  We use \parskip here
   5989 % to help in doing that, since in @example-like environments \parskip
   5990 % is reset to zero; thus the \afterenvbreak inserts no space -- but the
   5991 % start of the next paragraph will insert \parskip.
   5992 %
   5993 \def\aboveenvbreak{{%
   5994   % =10000 instead of <10000 because of a special case in \itemzzz and
   5995   % \sectionheading, q.v.
   5996   \ifnum \lastpenalty=10000 \else
   5997     \advance\envskipamount by \parskip
   5998     \endgraf
   5999     \ifdim\lastskip<\envskipamount
   6000       \removelastskip
   6001       % it's not a good place to break if the last penalty was \nobreak
   6002       % or better ...
   6003       \ifnum\lastpenalty<10000 \penalty-50 \fi
   6004       \vskip\envskipamount
   6005     \fi
   6006   \fi
   6007 }}
   6008 
   6009 \let\afterenvbreak = \aboveenvbreak
   6010 
   6011 % \nonarrowing is a flag.  If "set", @lisp etc don't narrow margins; it will
   6012 % also clear it, so that its embedded environments do the narrowing again.
   6013 \let\nonarrowing=\relax
   6014 
   6015 % @cartouche ... @end cartouche: draw rectangle w/rounded corners around
   6016 % environment contents.
   6017 \font\circle=lcircle10
   6018 \newdimen\circthick
   6019 \newdimen\cartouter\newdimen\cartinner
   6020 \newskip\normbskip\newskip\normpskip\newskip\normlskip
   6021 \circthick=\fontdimen8\circle
   6022 %
   6023 \def\ctl{{\circle\char'013\hskip -6pt}}% 6pt from pl file: 1/2charwidth
   6024 \def\ctr{{\hskip 6pt\circle\char'010}}
   6025 \def\cbl{{\circle\char'012\hskip -6pt}}
   6026 \def\cbr{{\hskip 6pt\circle\char'011}}
   6027 \def\carttop{\hbox to \cartouter{\hskip\lskip
   6028         \ctl\leaders\hrule height\circthick\hfil\ctr
   6029         \hskip\rskip}}
   6030 \def\cartbot{\hbox to \cartouter{\hskip\lskip
   6031         \cbl\leaders\hrule height\circthick\hfil\cbr
   6032         \hskip\rskip}}
   6033 %
   6034 \newskip\lskip\newskip\rskip
   6035 
   6036 \envdef\cartouche{%
   6037   \ifhmode\par\fi  % can't be in the midst of a paragraph.
   6038   \startsavinginserts
   6039   \lskip=\leftskip \rskip=\rightskip
   6040   \leftskip=0pt\rightskip=0pt % we want these *outside*.
   6041   \cartinner=\hsize \advance\cartinner by-\lskip
   6042   \advance\cartinner by-\rskip
   6043   \cartouter=\hsize
   6044   \advance\cartouter by 18.4pt	% allow for 3pt kerns on either
   6045 				% side, and for 6pt waste from
   6046 				% each corner char, and rule thickness
   6047   \normbskip=\baselineskip \normpskip=\parskip \normlskip=\lineskip
   6048   % Flag to tell @lisp, etc., not to narrow margin.
   6049   \let\nonarrowing = t%
   6050   \vbox\bgroup
   6051       \baselineskip=0pt\parskip=0pt\lineskip=0pt
   6052       \carttop
   6053       \hbox\bgroup
   6054 	  \hskip\lskip
   6055 	  \vrule\kern3pt
   6056 	  \vbox\bgroup
   6057 	      \kern3pt
   6058 	      \hsize=\cartinner
   6059 	      \baselineskip=\normbskip
   6060 	      \lineskip=\normlskip
   6061 	      \parskip=\normpskip
   6062 	      \vskip -\parskip
   6063 	      \comment % For explanation, see the end of \def\group.
   6064 }
   6065 \def\Ecartouche{%
   6066               \ifhmode\par\fi
   6067 	      \kern3pt
   6068 	  \egroup
   6069 	  \kern3pt\vrule
   6070 	  \hskip\rskip
   6071       \egroup
   6072       \cartbot
   6073   \egroup
   6074   \checkinserts
   6075 }
   6076 
   6077 
   6078 % This macro is called at the beginning of all the @example variants,
   6079 % inside a group.
   6080 \newdimen\nonfillparindent
   6081 \def\nonfillstart{%
   6082   \aboveenvbreak
   6083   \hfuzz = 12pt % Don't be fussy
   6084   \sepspaces % Make spaces be word-separators rather than space tokens.
   6085   \let\par = \lisppar % don't ignore blank lines
   6086   \obeylines % each line of input is a line of output
   6087   \parskip = 0pt
   6088   % Turn off paragraph indentation but redefine \indent to emulate
   6089   % the normal \indent.
   6090   \nonfillparindent=\parindent
   6091   \parindent = 0pt
   6092   \let\indent\nonfillindent
   6093   %
   6094   \emergencystretch = 0pt % don't try to avoid overfull boxes
   6095   \ifx\nonarrowing\relax
   6096     \advance \leftskip by \lispnarrowing
   6097     \exdentamount=\lispnarrowing
   6098   \else
   6099     \let\nonarrowing = \relax
   6100   \fi
   6101   \let\exdent=\nofillexdent
   6102 }
   6103 
   6104 \begingroup
   6105 \obeyspaces
   6106 % We want to swallow spaces (but not other tokens) after the fake
   6107 % @indent in our nonfill-environments, where spaces are normally
   6108 % active and set to @tie, resulting in them not being ignored after
   6109 % @indent.
   6110 \gdef\nonfillindent{\futurelet\temp\nonfillindentcheck}%
   6111 \gdef\nonfillindentcheck{%
   6112 \ifx\temp %
   6113 \expandafter\nonfillindentgobble%
   6114 \else%
   6115 \leavevmode\nonfillindentbox%
   6116 \fi%
   6117 }%
   6118 \endgroup
   6119 \def\nonfillindentgobble#1{\nonfillindent}
   6120 \def\nonfillindentbox{\hbox to \nonfillparindent{\hss}}
   6121 
   6122 % If you want all examples etc. small: @set dispenvsize small.
   6123 % If you want even small examples the full size: @set dispenvsize nosmall.
   6124 % This affects the following displayed environments:
   6125 %    @example, @display, @format, @lisp
   6126 %
   6127 \def\smallword{small}
   6128 \def\nosmallword{nosmall}
   6129 \let\SETdispenvsize\relax
   6130 \def\setnormaldispenv{%
   6131   \ifx\SETdispenvsize\smallword
   6132     % end paragraph for sake of leading, in case document has no blank
   6133     % line.  This is redundant with what happens in \aboveenvbreak, but
   6134     % we need to do it before changing the fonts, and it's inconvenient
   6135     % to change the fonts afterward.
   6136     \ifnum \lastpenalty=10000 \else \endgraf \fi
   6137     \smallexamplefonts \rm
   6138   \fi
   6139 }
   6140 \def\setsmalldispenv{%
   6141   \ifx\SETdispenvsize\nosmallword
   6142   \else
   6143     \ifnum \lastpenalty=10000 \else \endgraf \fi
   6144     \smallexamplefonts \rm
   6145   \fi
   6146 }
   6147 
   6148 % We often define two environments, @foo and @smallfoo.
   6149 % Let's do it by one command:
   6150 \def\makedispenv #1#2{
   6151   \expandafter\envdef\csname#1\endcsname {\setnormaldispenv #2}
   6152   \expandafter\envdef\csname small#1\endcsname {\setsmalldispenv #2}
   6153   \expandafter\let\csname E#1\endcsname \afterenvbreak
   6154   \expandafter\let\csname Esmall#1\endcsname \afterenvbreak
   6155 }
   6156 
   6157 % Define two synonyms:
   6158 \def\maketwodispenvs #1#2#3{
   6159   \makedispenv{#1}{#3}
   6160   \makedispenv{#2}{#3}
   6161 }
   6162 
   6163 % @lisp: indented, narrowed, typewriter font; @example: same as @lisp.
   6164 %
   6165 % @smallexample and @smalllisp: use smaller fonts.
   6166 % Originally contributed by Pavel@xerox.
   6167 %
   6168 \maketwodispenvs {lisp}{example}{%
   6169   \nonfillstart
   6170   \tt\setupmarkupstyle{example}%
   6171   \let\kbdfont = \kbdexamplefont % Allow @kbd to do something special.
   6172   \gobble       % eat return
   6173 }
   6174 % @display/@smalldisplay: same as @lisp except keep current font.
   6175 %
   6176 \makedispenv {display}{%
   6177   \nonfillstart
   6178   \gobble
   6179 }
   6180 
   6181 % @format/@smallformat: same as @display except don't narrow margins.
   6182 %
   6183 \makedispenv{format}{%
   6184   \let\nonarrowing = t%
   6185   \nonfillstart
   6186   \gobble
   6187 }
   6188 
   6189 % @flushleft: same as @format, but doesn't obey \SETdispenvsize.
   6190 \envdef\flushleft{%
   6191   \let\nonarrowing = t%
   6192   \nonfillstart
   6193   \gobble
   6194 }
   6195 \let\Eflushleft = \afterenvbreak
   6196 
   6197 % @flushright.
   6198 %
   6199 \envdef\flushright{%
   6200   \let\nonarrowing = t%
   6201   \nonfillstart
   6202   \advance\leftskip by 0pt plus 1fill
   6203   \gobble
   6204 }
   6205 \let\Eflushright = \afterenvbreak
   6206 
   6207 
   6208 % @raggedright does more-or-less normal line breaking but no right
   6209 % justification.  From plain.tex.
   6210 \envdef\raggedright{%
   6211   \rightskip0pt plus2em \spaceskip.3333em \xspaceskip.5em\relax
   6212 }
   6213 \let\Eraggedright\par
   6214 
   6215 \envdef\raggedleft{%
   6216   \parindent=0pt \leftskip0pt plus2em
   6217   \spaceskip.3333em \xspaceskip.5em \parfillskip=0pt
   6218   \hbadness=10000 % Last line will usually be underfull, so turn off
   6219                   % badness reporting.
   6220 }
   6221 \let\Eraggedleft\par
   6222 
   6223 \envdef\raggedcenter{%
   6224   \parindent=0pt \rightskip0pt plus1em \leftskip0pt plus1em
   6225   \spaceskip.3333em \xspaceskip.5em \parfillskip=0pt
   6226   \hbadness=10000 % Last line will usually be underfull, so turn off
   6227                   % badness reporting.
   6228 }
   6229 \let\Eraggedcenter\par
   6230 
   6231 
   6232 % @quotation does normal linebreaking (hence we can't use \nonfillstart)
   6233 % and narrows the margins.  We keep \parskip nonzero in general, since
   6234 % we're doing normal filling.  So, when using \aboveenvbreak and
   6235 % \afterenvbreak, temporarily make \parskip 0.
   6236 %
   6237 \def\quotationstart{%
   6238   {\parskip=0pt \aboveenvbreak}% because \aboveenvbreak inserts \parskip
   6239   \parindent=0pt
   6240   %
   6241   % @cartouche defines \nonarrowing to inhibit narrowing at next level down.
   6242   \ifx\nonarrowing\relax
   6243     \advance\leftskip by \lispnarrowing
   6244     \advance\rightskip by \lispnarrowing
   6245     \exdentamount = \lispnarrowing
   6246   \else
   6247     \let\nonarrowing = \relax
   6248   \fi
   6249   \parsearg\quotationlabel
   6250 }
   6251 
   6252 \envdef\quotation{%
   6253   \setnormaldispenv
   6254   \quotationstart
   6255 }
   6256 
   6257 \envdef\smallquotation{%
   6258   \setsmalldispenv
   6259   \quotationstart
   6260 }
   6261 \let\Esmallquotation = \Equotation
   6262 
   6263 % We have retained a nonzero parskip for the environment, since we're
   6264 % doing normal filling.
   6265 %
   6266 \def\Equotation{%
   6267   \par
   6268   \ifx\quotationauthor\undefined\else
   6269     % indent a bit.
   6270     \leftline{\kern 2\leftskip \sl ---\quotationauthor}%
   6271   \fi
   6272   {\parskip=0pt \afterenvbreak}%
   6273 }
   6274 
   6275 % If we're given an argument, typeset it in bold with a colon after.
   6276 \def\quotationlabel#1{%
   6277   \def\temp{#1}%
   6278   \ifx\temp\empty \else
   6279     {\bf #1: }%
   6280   \fi
   6281 }
   6282 
   6283 
   6284 % LaTeX-like @verbatim...@end verbatim and @verb{<char>...<char>}
   6285 % If we want to allow any <char> as delimiter,
   6286 % we need the curly braces so that makeinfo sees the @verb command, eg:
   6287 % `@verbx...x' would look like the '@verbx' command.  --janneke (a] gnu.org
   6288 %
   6289 % [Knuth]: Donald Ervin Knuth, 1996.  The TeXbook.
   6290 %
   6291 % [Knuth] p.344; only we need to do the other characters Texinfo sets
   6292 % active too.  Otherwise, they get lost as the first character on a
   6293 % verbatim line.
   6294 \def\dospecials{%
   6295   \do\ \do\\\do\{\do\}\do\$\do\&%
   6296   \do\#\do\^\do\^^K\do\_\do\^^A\do\%\do\~%
   6297   \do\<\do\>\do\|\do\@\do+\do\"%
   6298   % Don't do the quotes -- if we do, @set txicodequoteundirected and
   6299   % @set txicodequotebacktick will not have effect on @verb and
   6300   % @verbatim, and ?` and !` ligatures won't get disabled.
   6301   %\do\`\do\'%
   6302 }
   6303 %
   6304 % [Knuth] p. 380
   6305 \def\uncatcodespecials{%
   6306   \def\do##1{\catcode`##1=\other}\dospecials}
   6307 %
   6308 % Setup for the @verb command.
   6309 %
   6310 % Eight spaces for a tab
   6311 \begingroup
   6312   \catcode`\^^I=\active
   6313   \gdef\tabeightspaces{\catcode`\^^I=\active\def^^I{\ \ \ \ \ \ \ \ }}
   6314 \endgroup
   6315 %
   6316 \def\setupverb{%
   6317   \tt  % easiest (and conventionally used) font for verbatim
   6318   \def\par{\leavevmode\endgraf}%
   6319   \setupmarkupstyle{verb}%
   6320   \tabeightspaces
   6321   % Respect line breaks,
   6322   % print special symbols as themselves, and
   6323   % make each space count
   6324   % must do in this order:
   6325   \obeylines \uncatcodespecials \sepspaces
   6326 }
   6327 
   6328 % Setup for the @verbatim environment
   6329 %
   6330 % Real tab expansion
   6331 \newdimen\tabw \setbox0=\hbox{\tt\space} \tabw=8\wd0 % tab amount
   6332 %
   6333 \def\starttabbox{\setbox0=\hbox\bgroup}
   6334 %
   6335 \begingroup
   6336   \catcode`\^^I=\active
   6337   \gdef\tabexpand{%
   6338     \catcode`\^^I=\active
   6339     \def^^I{\leavevmode\egroup
   6340       \dimen0=\wd0 % the width so far, or since the previous tab
   6341       \divide\dimen0 by\tabw
   6342       \multiply\dimen0 by\tabw % compute previous multiple of \tabw
   6343       \advance\dimen0 by\tabw  % advance to next multiple of \tabw
   6344       \wd0=\dimen0 \box0 \starttabbox
   6345     }%
   6346   }
   6347 \endgroup
   6348 
   6349 % start the verbatim environment.
   6350 \def\setupverbatim{%
   6351   \let\nonarrowing = t%
   6352   \nonfillstart
   6353   % Easiest (and conventionally used) font for verbatim
   6354   \tt
   6355   \def\par{\leavevmode\egroup\box0\endgraf}%
   6356   \tabexpand
   6357   \setupmarkupstyle{verbatim}%
   6358   % Respect line breaks,
   6359   % print special symbols as themselves, and
   6360   % make each space count
   6361   % must do in this order:
   6362   \obeylines \uncatcodespecials \sepspaces
   6363   \everypar{\starttabbox}%
   6364 }
   6365 
   6366 % Do the @verb magic: verbatim text is quoted by unique
   6367 % delimiter characters.  Before first delimiter expect a
   6368 % right brace, after last delimiter expect closing brace:
   6369 %
   6370 %    \def\doverb'{'<char>#1<char>'}'{#1}
   6371 %
   6372 % [Knuth] p. 382; only eat outer {}
   6373 \begingroup
   6374   \catcode`[=1\catcode`]=2\catcode`\{=\other\catcode`\}=\other
   6375   \gdef\doverb{#1[\def\next##1#1}[##1\endgroup]\next]
   6376 \endgroup
   6377 %
   6378 \def\verb{\begingroup\setupverb\doverb}
   6379 %
   6380 %
   6381 % Do the @verbatim magic: define the macro \doverbatim so that
   6382 % the (first) argument ends when '@end verbatim' is reached, ie:
   6383 %
   6384 %     \def\doverbatim#1@end verbatim{#1}
   6385 %
   6386 % For Texinfo it's a lot easier than for LaTeX,
   6387 % because texinfo's \verbatim doesn't stop at '\end{verbatim}':
   6388 % we need not redefine '\', '{' and '}'.
   6389 %
   6390 % Inspired by LaTeX's verbatim command set [latex.ltx]
   6391 %
   6392 \begingroup
   6393   \catcode`\ =\active
   6394   \obeylines %
   6395   % ignore everything up to the first ^^M, that's the newline at the end
   6396   % of the @verbatim input line itself.  Otherwise we get an extra blank
   6397   % line in the output.
   6398   \xdef\doverbatim#1^^M#2@end verbatim{#2\noexpand\end\gobble verbatim}%
   6399   % We really want {...\end verbatim} in the body of the macro, but
   6400   % without the active space; thus we have to use \xdef and \gobble.
   6401 \endgroup
   6402 %
   6403 \envdef\verbatim{%
   6404     \setupverbatim\doverbatim
   6405 }
   6406 \let\Everbatim = \afterenvbreak
   6407 
   6408 
   6409 % @verbatiminclude FILE - insert text of file in verbatim environment.
   6410 %
   6411 \def\verbatiminclude{\parseargusing\filenamecatcodes\doverbatiminclude}
   6412 %
   6413 \def\doverbatiminclude#1{%
   6414   {%
   6415     \makevalueexpandable
   6416     \setupverbatim
   6417     \indexnofonts       % Allow `@@' and other weird things in file names.
   6418     \input #1
   6419     \afterenvbreak
   6420   }%
   6421 }
   6422 
   6423 % @copying ... @end copying.
   6424 % Save the text away for @insertcopying later.
   6425 %
   6426 % We save the uninterpreted tokens, rather than creating a box.
   6427 % Saving the text in a box would be much easier, but then all the
   6428 % typesetting commands (@smallbook, font changes, etc.) have to be done
   6429 % beforehand -- and a) we want @copying to be done first in the source
   6430 % file; b) letting users define the frontmatter in as flexible order as
   6431 % possible is very desirable.
   6432 %
   6433 \def\copying{\checkenv{}\begingroup\scanargctxt\docopying}
   6434 \def\docopying#1@end copying{\endgroup\def\copyingtext{#1}}
   6435 %
   6436 \def\insertcopying{%
   6437   \begingroup
   6438     \parindent = 0pt  % paragraph indentation looks wrong on title page
   6439     \scanexp\copyingtext
   6440   \endgroup
   6441 }
   6442 
   6443 
   6444 \message{defuns,}
   6445 % @defun etc.
   6446 
   6447 \newskip\defbodyindent \defbodyindent=.4in
   6448 \newskip\defargsindent \defargsindent=50pt
   6449 \newskip\deflastargmargin \deflastargmargin=18pt
   6450 \newcount\defunpenalty
   6451 
   6452 % Start the processing of @deffn:
   6453 \def\startdefun{%
   6454   \ifnum\lastpenalty<10000
   6455     \medbreak
   6456     \defunpenalty=10003 % Will keep this @deffn together with the
   6457                         % following @def command, see below.
   6458   \else
   6459     % If there are two @def commands in a row, we'll have a \nobreak,
   6460     % which is there to keep the function description together with its
   6461     % header.  But if there's nothing but headers, we need to allow a
   6462     % break somewhere.  Check specifically for penalty 10002, inserted
   6463     % by \printdefunline, instead of 10000, since the sectioning
   6464     % commands also insert a nobreak penalty, and we don't want to allow
   6465     % a break between a section heading and a defun.
   6466     %
   6467     % As a minor refinement, we avoid "club" headers by signalling
   6468     % with penalty of 10003 after the very first @deffn in the
   6469     % sequence (see above), and penalty of 10002 after any following
   6470     % @def command.
   6471     \ifnum\lastpenalty=10002 \penalty2000 \else \defunpenalty=10002 \fi
   6472     %
   6473     % Similarly, after a section heading, do not allow a break.
   6474     % But do insert the glue.
   6475     \medskip  % preceded by discardable penalty, so not a breakpoint
   6476   \fi
   6477   %
   6478   \parindent=0in
   6479   \advance\leftskip by \defbodyindent
   6480   \exdentamount=\defbodyindent
   6481 }
   6482 
   6483 \def\dodefunx#1{%
   6484   % First, check whether we are in the right environment:
   6485   \checkenv#1%
   6486   %
   6487   % As above, allow line break if we have multiple x headers in a row.
   6488   % It's not a great place, though.
   6489   \ifnum\lastpenalty=10002 \penalty3000 \else \defunpenalty=10002 \fi
   6490   %
   6491   % And now, it's time to reuse the body of the original defun:
   6492   \expandafter\gobbledefun#1%
   6493 }
   6494 \def\gobbledefun#1\startdefun{}
   6495 
   6496 % \printdefunline \deffnheader{text}
   6497 %
   6498 \def\printdefunline#1#2{%
   6499   \begingroup
   6500     % call \deffnheader:
   6501     #1#2 \endheader
   6502     % common ending:
   6503     \interlinepenalty = 10000
   6504     \advance\rightskip by 0pt plus 1fil
   6505     \endgraf
   6506     \nobreak\vskip -\parskip
   6507     \penalty\defunpenalty  % signal to \startdefun and \dodefunx
   6508     % Some of the @defun-type tags do not enable magic parentheses,
   6509     % rendering the following check redundant.  But we don't optimize.
   6510     \checkparencounts
   6511   \endgroup
   6512 }
   6513 
   6514 \def\Edefun{\endgraf\medbreak}
   6515 
   6516 % \makedefun{deffn} creates \deffn, \deffnx and \Edeffn;
   6517 % the only thing remaining is to define \deffnheader.
   6518 %
   6519 \def\makedefun#1{%
   6520   \expandafter\let\csname E#1\endcsname = \Edefun
   6521   \edef\temp{\noexpand\domakedefun
   6522     \makecsname{#1}\makecsname{#1x}\makecsname{#1header}}%
   6523   \temp
   6524 }
   6525 
   6526 % \domakedefun \deffn \deffnx \deffnheader
   6527 %
   6528 % Define \deffn and \deffnx, without parameters.
   6529 % \deffnheader has to be defined explicitly.
   6530 %
   6531 \def\domakedefun#1#2#3{%
   6532   \envdef#1{%
   6533     \startdefun
   6534     \parseargusing\activeparens{\printdefunline#3}%
   6535   }%
   6536   \def#2{\dodefunx#1}%
   6537   \def#3%
   6538 }
   6539 
   6540 %%% Untyped functions:
   6541 
   6542 % @deffn category name args
   6543 \makedefun{deffn}{\deffngeneral{}}
   6544 
   6545 % @deffn category class name args
   6546 \makedefun{defop}#1 {\defopon{#1\ \putwordon}}
   6547 
   6548 % \defopon {category on}class name args
   6549 \def\defopon#1#2 {\deffngeneral{\putwordon\ \code{#2}}{#1\ \code{#2}} }
   6550 
   6551 % \deffngeneral {subind}category name args
   6552 %
   6553 \def\deffngeneral#1#2 #3 #4\endheader{%
   6554   % Remember that \dosubind{fn}{foo}{} is equivalent to \doind{fn}{foo}.
   6555   \dosubind{fn}{\code{#3}}{#1}%
   6556   \defname{#2}{}{#3}\magicamp\defunargs{#4\unskip}%
   6557 }
   6558 
   6559 %%% Typed functions:
   6560 
   6561 % @deftypefn category type name args
   6562 \makedefun{deftypefn}{\deftypefngeneral{}}
   6563 
   6564 % @deftypeop category class type name args
   6565 \makedefun{deftypeop}#1 {\deftypeopon{#1\ \putwordon}}
   6566 
   6567 % \deftypeopon {category on}class type name args
   6568 \def\deftypeopon#1#2 {\deftypefngeneral{\putwordon\ \code{#2}}{#1\ \code{#2}} }
   6569 
   6570 % \deftypefngeneral {subind}category type name args
   6571 %
   6572 \def\deftypefngeneral#1#2 #3 #4 #5\endheader{%
   6573   \dosubind{fn}{\code{#4}}{#1}%
   6574   \defname{#2}{#3}{#4}\defunargs{#5\unskip}%
   6575 }
   6576 
   6577 %%% Typed variables:
   6578 
   6579 % @deftypevr category type var args
   6580 \makedefun{deftypevr}{\deftypecvgeneral{}}
   6581 
   6582 % @deftypecv category class type var args
   6583 \makedefun{deftypecv}#1 {\deftypecvof{#1\ \putwordof}}
   6584 
   6585 % \deftypecvof {category of}class type var args
   6586 \def\deftypecvof#1#2 {\deftypecvgeneral{\putwordof\ \code{#2}}{#1\ \code{#2}} }
   6587 
   6588 % \deftypecvgeneral {subind}category type var args
   6589 %
   6590 \def\deftypecvgeneral#1#2 #3 #4 #5\endheader{%
   6591   \dosubind{vr}{\code{#4}}{#1}%
   6592   \defname{#2}{#3}{#4}\defunargs{#5\unskip}%
   6593 }
   6594 
   6595 %%% Untyped variables:
   6596 
   6597 % @defvr category var args
   6598 \makedefun{defvr}#1 {\deftypevrheader{#1} {} }
   6599 
   6600 % @defcv category class var args
   6601 \makedefun{defcv}#1 {\defcvof{#1\ \putwordof}}
   6602 
   6603 % \defcvof {category of}class var args
   6604 \def\defcvof#1#2 {\deftypecvof{#1}#2 {} }
   6605 
   6606 %%% Type:
   6607 % @deftp category name args
   6608 \makedefun{deftp}#1 #2 #3\endheader{%
   6609   \doind{tp}{\code{#2}}%
   6610   \defname{#1}{}{#2}\defunargs{#3\unskip}%
   6611 }
   6612 
   6613 % Remaining @defun-like shortcuts:
   6614 \makedefun{defun}{\deffnheader{\putwordDeffunc} }
   6615 \makedefun{defmac}{\deffnheader{\putwordDefmac} }
   6616 \makedefun{defspec}{\deffnheader{\putwordDefspec} }
   6617 \makedefun{deftypefun}{\deftypefnheader{\putwordDeffunc} }
   6618 \makedefun{defvar}{\defvrheader{\putwordDefvar} }
   6619 \makedefun{defopt}{\defvrheader{\putwordDefopt} }
   6620 \makedefun{deftypevar}{\deftypevrheader{\putwordDefvar} }
   6621 \makedefun{defmethod}{\defopon\putwordMethodon}
   6622 \makedefun{deftypemethod}{\deftypeopon\putwordMethodon}
   6623 \makedefun{defivar}{\defcvof\putwordInstanceVariableof}
   6624 \makedefun{deftypeivar}{\deftypecvof\putwordInstanceVariableof}
   6625 
   6626 % \defname, which formats the name of the @def (not the args).
   6627 % #1 is the category, such as "Function".
   6628 % #2 is the return type, if any.
   6629 % #3 is the function name.
   6630 %
   6631 % We are followed by (but not passed) the arguments, if any.
   6632 %
   6633 \def\defname#1#2#3{%
   6634   % Get the values of \leftskip and \rightskip as they were outside the @def...
   6635   \advance\leftskip by -\defbodyindent
   6636   %
   6637   % How we'll format the type name.  Putting it in brackets helps
   6638   % distinguish it from the body text that may end up on the next line
   6639   % just below it.
   6640   \def\temp{#1}%
   6641   \setbox0=\hbox{\kern\deflastargmargin \ifx\temp\empty\else [\rm\temp]\fi}
   6642   %
   6643   % Figure out line sizes for the paragraph shape.
   6644   % The first line needs space for \box0; but if \rightskip is nonzero,
   6645   % we need only space for the part of \box0 which exceeds it:
   6646   \dimen0=\hsize  \advance\dimen0 by -\wd0  \advance\dimen0 by \rightskip
   6647   % The continuations:
   6648   \dimen2=\hsize  \advance\dimen2 by -\defargsindent
   6649   % (plain.tex says that \dimen1 should be used only as global.)
   6650   \parshape 2 0in \dimen0 \defargsindent \dimen2
   6651   %
   6652   % Put the type name to the right margin.
   6653   \noindent
   6654   \hbox to 0pt{%
   6655     \hfil\box0 \kern-\hsize
   6656     % \hsize has to be shortened this way:
   6657     \kern\leftskip
   6658     % Intentionally do not respect \rightskip, since we need the space.
   6659   }%
   6660   %
   6661   % Allow all lines to be underfull without complaint:
   6662   \tolerance=10000 \hbadness=10000
   6663   \exdentamount=\defbodyindent
   6664   {%
   6665     % defun fonts. We use typewriter by default (used to be bold) because:
   6666     % . we're printing identifiers, they should be in tt in principle.
   6667     % . in languages with many accents, such as Czech or French, it's
   6668     %   common to leave accents off identifiers.  The result looks ok in
   6669     %   tt, but exceedingly strange in rm.
   6670     % . we don't want -- and --- to be treated as ligatures.
   6671     % . this still does not fix the ?` and !` ligatures, but so far no
   6672     %   one has made identifiers using them :).
   6673     \df \tt
   6674     \def\temp{#2}% return value type
   6675     \ifx\temp\empty\else \tclose{\temp} \fi
   6676     #3% output function name
   6677   }%
   6678   {\rm\enskip}% hskip 0.5 em of \tenrm
   6679   %
   6680   \boldbrax
   6681   % arguments will be output next, if any.
   6682 }
   6683 
   6684 % Print arguments in slanted roman (not ttsl), inconsistently with using
   6685 % tt for the name.  This is because literal text is sometimes needed in
   6686 % the argument list (groff manual), and ttsl and tt are not very
   6687 % distinguishable.  Prevent hyphenation at `-' chars.
   6688 %
   6689 \def\defunargs#1{%
   6690   % use sl by default (not ttsl),
   6691   % tt for the names.
   6692   \df \sl \hyphenchar\font=0
   6693   %
   6694   % On the other hand, if an argument has two dashes (for instance), we
   6695   % want a way to get ttsl.  Let's try @var for that.
   6696   \def\var##1{{\setupmarkupstyle{var}\ttslanted{##1}}}%
   6697   #1%
   6698   \sl\hyphenchar\font=45
   6699 }
   6700 
   6701 % We want ()&[] to print specially on the defun line.
   6702 %
   6703 \def\activeparens{%
   6704   \catcode`\(=\active \catcode`\)=\active
   6705   \catcode`\[=\active \catcode`\]=\active
   6706   \catcode`\&=\active
   6707 }
   6708 
   6709 % Make control sequences which act like normal parenthesis chars.
   6710 \let\lparen = ( \let\rparen = )
   6711 
   6712 % Be sure that we always have a definition for `(', etc.  For example,
   6713 % if the fn name has parens in it, \boldbrax will not be in effect yet,
   6714 % so TeX would otherwise complain about undefined control sequence.
   6715 {
   6716   \activeparens
   6717   \global\let(=\lparen \global\let)=\rparen
   6718   \global\let[=\lbrack \global\let]=\rbrack
   6719   \global\let& = \&
   6720 
   6721   \gdef\boldbrax{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb}
   6722   \gdef\magicamp{\let&=\amprm}
   6723 }
   6724 
   6725 \newcount\parencount
   6726 
   6727 % If we encounter &foo, then turn on ()-hacking afterwards
   6728 \newif\ifampseen
   6729 \def\amprm#1 {\ampseentrue{\bf\&#1 }}
   6730 
   6731 \def\parenfont{%
   6732   \ifampseen
   6733     % At the first level, print parens in roman,
   6734     % otherwise use the default font.
   6735     \ifnum \parencount=1 \rm \fi
   6736   \else
   6737     % The \sf parens (in \boldbrax) actually are a little bolder than
   6738     % the contained text.  This is especially needed for [ and ] .
   6739     \sf
   6740   \fi
   6741 }
   6742 \def\infirstlevel#1{%
   6743   \ifampseen
   6744     \ifnum\parencount=1
   6745       #1%
   6746     \fi
   6747   \fi
   6748 }
   6749 \def\bfafterword#1 {#1 \bf}
   6750 
   6751 \def\opnr{%
   6752   \global\advance\parencount by 1
   6753   {\parenfont(}%
   6754   \infirstlevel \bfafterword
   6755 }
   6756 \def\clnr{%
   6757   {\parenfont)}%
   6758   \infirstlevel \sl
   6759   \global\advance\parencount by -1
   6760 }
   6761 
   6762 \newcount\brackcount
   6763 \def\lbrb{%
   6764   \global\advance\brackcount by 1
   6765   {\bf[}%
   6766 }
   6767 \def\rbrb{%
   6768   {\bf]}%
   6769   \global\advance\brackcount by -1
   6770 }
   6771 
   6772 \def\checkparencounts{%
   6773   \ifnum\parencount=0 \else \badparencount \fi
   6774   \ifnum\brackcount=0 \else \badbrackcount \fi
   6775 }
   6776 % these should not use \errmessage; the glibc manual, at least, actually
   6777 % has such constructs (when documenting function pointers).
   6778 \def\badparencount{%
   6779   \message{Warning: unbalanced parentheses in @def...}%
   6780   \global\parencount=0
   6781 }
   6782 \def\badbrackcount{%
   6783   \message{Warning: unbalanced square brackets in @def...}%
   6784   \global\brackcount=0
   6785 }
   6786 
   6787 
   6788 \message{macros,}
   6789 % @macro.
   6790 
   6791 % To do this right we need a feature of e-TeX, \scantokens,
   6792 % which we arrange to emulate with a temporary file in ordinary TeX.
   6793 \ifx\eTeXversion\undefined
   6794   \newwrite\macscribble
   6795   \def\scantokens#1{%
   6796     \toks0={#1}%
   6797     \immediate\openout\macscribble=\jobname.tmp
   6798     \immediate\write\macscribble{\the\toks0}%
   6799     \immediate\closeout\macscribble
   6800     \input \jobname.tmp
   6801   }
   6802 \fi
   6803 
   6804 \def\scanmacro#1{%
   6805   \begingroup
   6806     \newlinechar`\^^M
   6807     \let\xeatspaces\eatspaces
   6808     % Undo catcode changes of \startcontents and \doprintindex
   6809     % When called from @insertcopying or (short)caption, we need active
   6810     % backslash to get it printed correctly.  Previously, we had
   6811     % \catcode`\\=\other instead.  We'll see whether a problem appears
   6812     % with macro expansion.				--kasal, 19aug04
   6813     \catcode`\@=0 \catcode`\\=\active \escapechar=`\@
   6814     % ... and \example
   6815     \spaceisspace
   6816     %
   6817     % Append \endinput to make sure that TeX does not see the ending newline.
   6818     % I've verified that it is necessary both for e-TeX and for ordinary TeX
   6819     %							--kasal, 29nov03
   6820     \scantokens{#1\endinput}%
   6821   \endgroup
   6822 }
   6823 
   6824 \def\scanexp#1{%
   6825   \edef\temp{\noexpand\scanmacro{#1}}%
   6826   \temp
   6827 }
   6828 
   6829 \newcount\paramno   % Count of parameters
   6830 \newtoks\macname    % Macro name
   6831 \newif\ifrecursive  % Is it recursive?
   6832 
   6833 % List of all defined macros in the form
   6834 %    \definedummyword\macro1\definedummyword\macro2...
   6835 % Currently is also contains all @aliases; the list can be split
   6836 % if there is a need.
   6837 \def\macrolist{}
   6838 
   6839 % Add the macro to \macrolist
   6840 \def\addtomacrolist#1{\expandafter \addtomacrolistxxx \csname#1\endcsname}
   6841 \def\addtomacrolistxxx#1{%
   6842      \toks0 = \expandafter{\macrolist\definedummyword#1}%
   6843      \xdef\macrolist{\the\toks0}%
   6844 }
   6845 
   6846 % Utility routines.
   6847 % This does \let #1 = #2, with \csnames; that is,
   6848 %   \let \csname#1\endcsname = \csname#2\endcsname
   6849 % (except of course we have to play expansion games).
   6850 %
   6851 \def\cslet#1#2{%
   6852   \expandafter\let
   6853   \csname#1\expandafter\endcsname
   6854   \csname#2\endcsname
   6855 }
   6856 
   6857 % Trim leading and trailing spaces off a string.
   6858 % Concepts from aro-bend problem 15 (see CTAN).
   6859 {\catcode`\@=11
   6860 \gdef\eatspaces #1{\expandafter\trim@\expandafter{#1 }}
   6861 \gdef\trim@ #1{\trim@@ @#1 @ #1 @ @@}
   6862 \gdef\trim@@ #1@ #2@ #3@@{\trim@@@\empty #2 @}
   6863 \def\unbrace#1{#1}
   6864 \unbrace{\gdef\trim@@@ #1 } #2@{#1}
   6865 }
   6866 
   6867 % Trim a single trailing ^^M off a string.
   6868 {\catcode`\^^M=\other \catcode`\Q=3%
   6869 \gdef\eatcr #1{\eatcra #1Q^^MQ}%
   6870 \gdef\eatcra#1^^MQ{\eatcrb#1Q}%
   6871 \gdef\eatcrb#1Q#2Q{#1}%
   6872 }
   6873 
   6874 % Macro bodies are absorbed as an argument in a context where
   6875 % all characters are catcode 10, 11 or 12, except \ which is active
   6876 % (as in normal texinfo). It is necessary to change the definition of \.
   6877 
   6878 % Non-ASCII encodings make 8-bit characters active, so un-activate
   6879 % them to avoid their expansion.  Must do this non-globally, to
   6880 % confine the change to the current group.
   6881 
   6882 % It's necessary to have hard CRs when the macro is executed. This is
   6883 % done by  making ^^M (\endlinechar) catcode 12 when reading the macro
   6884 % body, and then making it the \newlinechar in \scanmacro.
   6885 
   6886 \def\scanctxt{%
   6887   \catcode`\"=\other
   6888   \catcode`\+=\other
   6889   \catcode`\<=\other
   6890   \catcode`\>=\other
   6891   \catcode`\@=\other
   6892   \catcode`\^=\other
   6893   \catcode`\_=\other
   6894   \catcode`\|=\other
   6895   \catcode`\~=\other
   6896   \ifx\declaredencoding\ascii \else \setnonasciicharscatcodenonglobal\other \fi
   6897 }
   6898 
   6899 \def\scanargctxt{%
   6900   \scanctxt
   6901   \catcode`\\=\other
   6902   \catcode`\^^M=\other
   6903 }
   6904 
   6905 \def\macrobodyctxt{%
   6906   \scanctxt
   6907   \catcode`\{=\other
   6908   \catcode`\}=\other
   6909   \catcode`\^^M=\other
   6910   \usembodybackslash
   6911 }
   6912 
   6913 \def\macroargctxt{%
   6914   \scanctxt
   6915   \catcode`\\=\other
   6916 }
   6917 
   6918 % \mbodybackslash is the definition of \ in @macro bodies.
   6919 % It maps \foo\ => \csname macarg.foo\endcsname => #N
   6920 % where N is the macro parameter number.
   6921 % We define \csname macarg.\endcsname to be \realbackslash, so
   6922 % \\ in macro replacement text gets you a backslash.
   6923 
   6924 {\catcode`@=0 @catcode`@\=@active
   6925  @gdef@usembodybackslash{@let\=@mbodybackslash}
   6926  @gdef@mbodybackslash#1\{@csname macarg.#1@endcsname}
   6927 }
   6928 \expandafter\def\csname macarg.\endcsname{\realbackslash}
   6929 
   6930 \def\macro{\recursivefalse\parsearg\macroxxx}
   6931 \def\rmacro{\recursivetrue\parsearg\macroxxx}
   6932 
   6933 \def\macroxxx#1{%
   6934   \getargs{#1}%           now \macname is the macname and \argl the arglist
   6935   \ifx\argl\empty       % no arguments
   6936      \paramno=0%
   6937   \else
   6938      \expandafter\parsemargdef \argl;%
   6939   \fi
   6940   \if1\csname ismacro.\the\macname\endcsname
   6941      \message{Warning: redefining \the\macname}%
   6942   \else
   6943      \expandafter\ifx\csname \the\macname\endcsname \relax
   6944      \else \errmessage{Macro name \the\macname\space already defined}\fi
   6945      \global\cslet{macsave.\the\macname}{\the\macname}%
   6946      \global\expandafter\let\csname ismacro.\the\macname\endcsname=1%
   6947      \addtomacrolist{\the\macname}%
   6948   \fi
   6949   \begingroup \macrobodyctxt
   6950   \ifrecursive \expandafter\parsermacbody
   6951   \else \expandafter\parsemacbody
   6952   \fi}
   6953 
   6954 \parseargdef\unmacro{%
   6955   \if1\csname ismacro.#1\endcsname
   6956     \global\cslet{#1}{macsave.#1}%
   6957     \global\expandafter\let \csname ismacro.#1\endcsname=0%
   6958     % Remove the macro name from \macrolist:
   6959     \begingroup
   6960       \expandafter\let\csname#1\endcsname \relax
   6961       \let\definedummyword\unmacrodo
   6962       \xdef\macrolist{\macrolist}%
   6963     \endgroup
   6964   \else
   6965     \errmessage{Macro #1 not defined}%
   6966   \fi
   6967 }
   6968 
   6969 % Called by \do from \dounmacro on each macro.  The idea is to omit any
   6970 % macro definitions that have been changed to \relax.
   6971 %
   6972 \def\unmacrodo#1{%
   6973   \ifx #1\relax
   6974     % remove this
   6975   \else
   6976     \noexpand\definedummyword \noexpand#1%
   6977   \fi
   6978 }
   6979 
   6980 % This makes use of the obscure feature that if the last token of a
   6981 % <parameter list> is #, then the preceding argument is delimited by
   6982 % an opening brace, and that opening brace is not consumed.
   6983 \def\getargs#1{\getargsxxx#1{}}
   6984 \def\getargsxxx#1#{\getmacname #1 \relax\getmacargs}
   6985 \def\getmacname #1 #2\relax{\macname={#1}}
   6986 \def\getmacargs#1{\def\argl{#1}}
   6987 
   6988 % Parse the optional {params} list.  Set up \paramno and \paramlist
   6989 % so \defmacro knows what to do.  Define \macarg.blah for each blah
   6990 % in the params list, to be ##N where N is the position in that list.
   6991 % That gets used by \mbodybackslash (above).
   6992 
   6993 % We need to get `macro parameter char #' into several definitions.
   6994 % The technique used is stolen from LaTeX:  let \hash be something
   6995 % unexpandable, insert that wherever you need a #, and then redefine
   6996 % it to # just before using the token list produced.
   6997 %
   6998 % The same technique is used to protect \eatspaces till just before
   6999 % the macro is used.
   7000 
   7001 \def\parsemargdef#1;{\paramno=0\def\paramlist{}%
   7002         \let\hash\relax\let\xeatspaces\relax\parsemargdefxxx#1,;,}
   7003 \def\parsemargdefxxx#1,{%
   7004   \if#1;\let\next=\relax
   7005   \else \let\next=\parsemargdefxxx
   7006     \advance\paramno by 1%
   7007     \expandafter\edef\csname macarg.\eatspaces{#1}\endcsname
   7008         {\xeatspaces{\hash\the\paramno}}%
   7009     \edef\paramlist{\paramlist\hash\the\paramno,}%
   7010   \fi\next}
   7011 
   7012 % These two commands read recursive and nonrecursive macro bodies.
   7013 % (They're different since rec and nonrec macros end differently.)
   7014 
   7015 \long\def\parsemacbody#1@end macro%
   7016 {\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
   7017 \long\def\parsermacbody#1@end rmacro%
   7018 {\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
   7019 
   7020 % This defines the macro itself. There are six cases: recursive and
   7021 % nonrecursive macros of zero, one, and many arguments.
   7022 % Much magic with \expandafter here.
   7023 % \xdef is used so that macro definitions will survive the file
   7024 % they're defined in; @include reads the file inside a group.
   7025 \def\defmacro{%
   7026   \let\hash=##% convert placeholders to macro parameter chars
   7027   \ifrecursive
   7028     \ifcase\paramno
   7029     % 0
   7030       \expandafter\xdef\csname\the\macname\endcsname{%
   7031         \noexpand\scanmacro{\temp}}%
   7032     \or % 1
   7033       \expandafter\xdef\csname\the\macname\endcsname{%
   7034          \bgroup\noexpand\macroargctxt
   7035          \noexpand\braceorline
   7036          \expandafter\noexpand\csname\the\macname xxx\endcsname}%
   7037       \expandafter\xdef\csname\the\macname xxx\endcsname##1{%
   7038          \egroup\noexpand\scanmacro{\temp}}%
   7039     \else % many
   7040       \expandafter\xdef\csname\the\macname\endcsname{%
   7041          \bgroup\noexpand\macroargctxt
   7042          \noexpand\csname\the\macname xx\endcsname}%
   7043       \expandafter\xdef\csname\the\macname xx\endcsname##1{%
   7044           \expandafter\noexpand\csname\the\macname xxx\endcsname ##1,}%
   7045       \expandafter\expandafter
   7046       \expandafter\xdef
   7047       \expandafter\expandafter
   7048         \csname\the\macname xxx\endcsname
   7049           \paramlist{\egroup\noexpand\scanmacro{\temp}}%
   7050     \fi
   7051   \else
   7052     \ifcase\paramno
   7053     % 0
   7054       \expandafter\xdef\csname\the\macname\endcsname{%
   7055         \noexpand\norecurse{\the\macname}%
   7056         \noexpand\scanmacro{\temp}\egroup}%
   7057     \or % 1
   7058       \expandafter\xdef\csname\the\macname\endcsname{%
   7059          \bgroup\noexpand\macroargctxt
   7060          \noexpand\braceorline
   7061          \expandafter\noexpand\csname\the\macname xxx\endcsname}%
   7062       \expandafter\xdef\csname\the\macname xxx\endcsname##1{%
   7063         \egroup
   7064         \noexpand\norecurse{\the\macname}%
   7065         \noexpand\scanmacro{\temp}\egroup}%
   7066     \else % many
   7067       \expandafter\xdef\csname\the\macname\endcsname{%
   7068          \bgroup\noexpand\macroargctxt
   7069          \expandafter\noexpand\csname\the\macname xx\endcsname}%
   7070       \expandafter\xdef\csname\the\macname xx\endcsname##1{%
   7071           \expandafter\noexpand\csname\the\macname xxx\endcsname ##1,}%
   7072       \expandafter\expandafter
   7073       \expandafter\xdef
   7074       \expandafter\expandafter
   7075       \csname\the\macname xxx\endcsname
   7076       \paramlist{%
   7077           \egroup
   7078           \noexpand\norecurse{\the\macname}%
   7079           \noexpand\scanmacro{\temp}\egroup}%
   7080     \fi
   7081   \fi}
   7082 
   7083 \def\norecurse#1{\bgroup\cslet{#1}{macsave.#1}}
   7084 
   7085 % \braceorline decides whether the next nonwhitespace character is a
   7086 % {.  If so it reads up to the closing }, if not, it reads the whole
   7087 % line.  Whatever was read is then fed to the next control sequence
   7088 % as an argument (by \parsebrace or \parsearg)
   7089 \def\braceorline#1{\let\macnamexxx=#1\futurelet\nchar\braceorlinexxx}
   7090 \def\braceorlinexxx{%
   7091   \ifx\nchar\bgroup\else
   7092     \expandafter\parsearg
   7093   \fi \macnamexxx}
   7094 
   7095 
   7096 % @alias.
   7097 % We need some trickery to remove the optional spaces around the equal
   7098 % sign.  Just make them active and then expand them all to nothing.
   7099 \def\alias{\parseargusing\obeyspaces\aliasxxx}
   7100 \def\aliasxxx #1{\aliasyyy#1\relax}
   7101 \def\aliasyyy #1=#2\relax{%
   7102   {%
   7103     \expandafter\let\obeyedspace=\empty
   7104     \addtomacrolist{#1}%
   7105     \xdef\next{\global\let\makecsname{#1}=\makecsname{#2}}%
   7106   }%
   7107   \next
   7108 }
   7109 
   7110 
   7111 \message{cross references,}
   7112 
   7113 \newwrite\auxfile
   7114 \newif\ifhavexrefs    % True if xref values are known.
   7115 \newif\ifwarnedxrefs  % True if we warned once that they aren't known.
   7116 
   7117 % @inforef is relatively simple.
   7118 \def\inforef #1{\inforefzzz #1,,,,**}
   7119 \def\inforefzzz #1,#2,#3,#4**{\putwordSee{} \putwordInfo{} \putwordfile{} \file{\ignorespaces #3{}},
   7120   node \samp{\ignorespaces#1{}}}
   7121 
   7122 % @node's only job in TeX is to define \lastnode, which is used in
   7123 % cross-references.  The @node line might or might not have commas, and
   7124 % might or might not have spaces before the first comma, like:
   7125 % @node foo , bar , ...
   7126 % We don't want such trailing spaces in the node name.
   7127 %
   7128 \parseargdef\node{\checkenv{}\donode #1 ,\finishnodeparse}
   7129 %
   7130 % also remove a trailing comma, in case of something like this:
   7131 % @node Help-Cross,  ,  , Cross-refs
   7132 \def\donode#1 ,#2\finishnodeparse{\dodonode #1,\finishnodeparse}
   7133 \def\dodonode#1,#2\finishnodeparse{\gdef\lastnode{#1}}
   7134 
   7135 \let\nwnode=\node
   7136 \let\lastnode=\empty
   7137 
   7138 % Write a cross-reference definition for the current node.  #1 is the
   7139 % type (Ynumbered, Yappendix, Ynothing).
   7140 %
   7141 \def\donoderef#1{%
   7142   \ifx\lastnode\empty\else
   7143     \setref{\lastnode}{#1}%
   7144     \global\let\lastnode=\empty
   7145   \fi
   7146 }
   7147 
   7148 % @anchor{NAME} -- define xref target at arbitrary point.
   7149 %
   7150 \newcount\savesfregister
   7151 %
   7152 \def\savesf{\relax \ifhmode \savesfregister=\spacefactor \fi}
   7153 \def\restoresf{\relax \ifhmode \spacefactor=\savesfregister \fi}
   7154 \def\anchor#1{\savesf \setref{#1}{Ynothing}\restoresf \ignorespaces}
   7155 
   7156 % \setref{NAME}{SNT} defines a cross-reference point NAME (a node or an
   7157 % anchor), which consists of three parts:
   7158 % 1) NAME-title - the current sectioning name taken from \lastsection,
   7159 %                 or the anchor name.
   7160 % 2) NAME-snt   - section number and type, passed as the SNT arg, or
   7161 %                 empty for anchors.
   7162 % 3) NAME-pg    - the page number.
   7163 %
   7164 % This is called from \donoderef, \anchor, and \dofloat.  In the case of
   7165 % floats, there is an additional part, which is not written here:
   7166 % 4) NAME-lof   - the text as it should appear in a @listoffloats.
   7167 %
   7168 \def\setref#1#2{%
   7169   \pdfmkdest{#1}%
   7170   \iflinks
   7171     {%
   7172       \atdummies  % preserve commands, but don't expand them
   7173       \edef\writexrdef##1##2{%
   7174 	\write\auxfile{@xrdef{#1-% #1 of \setref, expanded by the \edef
   7175 	  ##1}{##2}}% these are parameters of \writexrdef
   7176       }%
   7177       \toks0 = \expandafter{\lastsection}%
   7178       \immediate \writexrdef{title}{\the\toks0 }%
   7179       \immediate \writexrdef{snt}{\csname #2\endcsname}% \Ynumbered etc.
   7180       \safewhatsit{\writexrdef{pg}{\folio}}% will be written later, during \shipout
   7181     }%
   7182   \fi
   7183 }
   7184 
   7185 % @xref, @pxref, and @ref generate cross-references.  For \xrefX, #1 is
   7186 % the node name, #2 the name of the Info cross-reference, #3 the printed
   7187 % node name, #4 the name of the Info file, #5 the name of the printed
   7188 % manual.  All but the node name can be omitted.
   7189 %
   7190 \def\pxref#1{\putwordsee{} \xrefX[#1,,,,,,,]}
   7191 \def\xref#1{\putwordSee{} \xrefX[#1,,,,,,,]}
   7192 \def\ref#1{\xrefX[#1,,,,,,,]}
   7193 \def\xrefX[#1,#2,#3,#4,#5,#6]{\begingroup
   7194   \unsepspaces
   7195   \def\printedmanual{\ignorespaces #5}%
   7196   \def\printedrefname{\ignorespaces #3}%
   7197   \setbox1=\hbox{\printedmanual\unskip}%
   7198   \setbox0=\hbox{\printedrefname\unskip}%
   7199   \ifdim \wd0 = 0pt
   7200     % No printed node name was explicitly given.
   7201     \expandafter\ifx\csname SETxref-automatic-section-title\endcsname\relax
   7202       % Use the node name inside the square brackets.
   7203       \def\printedrefname{\ignorespaces #1}%
   7204     \else
   7205       % Use the actual chapter/section title appear inside
   7206       % the square brackets.  Use the real section title if we have it.
   7207       \ifdim \wd1 > 0pt
   7208         % It is in another manual, so we don't have it.
   7209         \def\printedrefname{\ignorespaces #1}%
   7210       \else
   7211         \ifhavexrefs
   7212           % We know the real title if we have the xref values.
   7213           \def\printedrefname{\refx{#1-title}{}}%
   7214         \else
   7215           % Otherwise just copy the Info node name.
   7216           \def\printedrefname{\ignorespaces #1}%
   7217         \fi%
   7218       \fi
   7219     \fi
   7220   \fi
   7221   %
   7222   % Make link in pdf output.
   7223   \ifpdf
   7224     {\indexnofonts
   7225      \turnoffactive
   7226      % This expands tokens, so do it after making catcode changes, so _
   7227      % etc. don't get their TeX definitions.
   7228      \getfilename{#4}%
   7229      %
   7230      % See comments at \activebackslashdouble.
   7231      {\activebackslashdouble \xdef\pdfxrefdest{#1}%
   7232       \backslashparens\pdfxrefdest}%
   7233      %
   7234      \leavevmode
   7235      \startlink attr{/Border [0 0 0]}%
   7236      \ifnum\filenamelength>0
   7237        goto file{\the\filename.pdf} name{\pdfxrefdest}%
   7238      \else
   7239        goto name{\pdfmkpgn{\pdfxrefdest}}%
   7240      \fi
   7241     }%
   7242     \setcolor{\linkcolor}%
   7243   \fi
   7244   %
   7245   % Float references are printed completely differently: "Figure 1.2"
   7246   % instead of "[somenode], p.3".  We distinguish them by the
   7247   % LABEL-title being set to a magic string.
   7248   {%
   7249     % Have to otherify everything special to allow the \csname to
   7250     % include an _ in the xref name, etc.
   7251     \indexnofonts
   7252     \turnoffactive
   7253     \expandafter\global\expandafter\let\expandafter\Xthisreftitle
   7254       \csname XR#1-title\endcsname
   7255   }%
   7256   \iffloat\Xthisreftitle
   7257     % If the user specified the print name (third arg) to the ref,
   7258     % print it instead of our usual "Figure 1.2".
   7259     \ifdim\wd0 = 0pt
   7260       \refx{#1-snt}{}%
   7261     \else
   7262       \printedrefname
   7263     \fi
   7264     %
   7265     % if the user also gave the printed manual name (fifth arg), append
   7266     % "in MANUALNAME".
   7267     \ifdim \wd1 > 0pt
   7268       \space \putwordin{} \cite{\printedmanual}%
   7269     \fi
   7270   \else
   7271     % node/anchor (non-float) references.
   7272     %
   7273     % If we use \unhbox0 and \unhbox1 to print the node names, TeX does not
   7274     % insert empty discretionaries after hyphens, which means that it will
   7275     % not find a line break at a hyphen in a node names.  Since some manuals
   7276     % are best written with fairly long node names, containing hyphens, this
   7277     % is a loss.  Therefore, we give the text of the node name again, so it
   7278     % is as if TeX is seeing it for the first time.
   7279     \ifdim \wd1 > 0pt
   7280       \putwordSection{} ``\printedrefname'' \putwordin{} \cite{\printedmanual}%
   7281     \else
   7282       % _ (for example) has to be the character _ for the purposes of the
   7283       % control sequence corresponding to the node, but it has to expand
   7284       % into the usual \leavevmode...\vrule stuff for purposes of
   7285       % printing. So we \turnoffactive for the \refx-snt, back on for the
   7286       % printing, back off for the \refx-pg.
   7287       {\turnoffactive
   7288        % Only output a following space if the -snt ref is nonempty; for
   7289        % @unnumbered and @anchor, it won't be.
   7290        \setbox2 = \hbox{\ignorespaces \refx{#1-snt}{}}%
   7291        \ifdim \wd2 > 0pt \refx{#1-snt}\space\fi
   7292       }%
   7293       % output the `[mynode]' via a macro so it can be overridden.
   7294       \xrefprintnodename\printedrefname
   7295       %
   7296       % But we always want a comma and a space:
   7297       ,\space
   7298       %
   7299       % output the `page 3'.
   7300       \turnoffactive \putwordpage\tie\refx{#1-pg}{}%
   7301     \fi
   7302   \fi
   7303   \endlink
   7304 \endgroup}
   7305 
   7306 % This macro is called from \xrefX for the `[nodename]' part of xref
   7307 % output.  It's a separate macro only so it can be changed more easily,
   7308 % since square brackets don't work well in some documents.  Particularly
   7309 % one that Bob is working on :).
   7310 %
   7311 \def\xrefprintnodename#1{[#1]}
   7312 
   7313 % Things referred to by \setref.
   7314 %
   7315 \def\Ynothing{}
   7316 \def\Yomitfromtoc{}
   7317 \def\Ynumbered{%
   7318   \ifnum\secno=0
   7319     \putwordChapter@tie \the\chapno
   7320   \else \ifnum\subsecno=0
   7321     \putwordSection@tie \the\chapno.\the\secno
   7322   \else \ifnum\subsubsecno=0
   7323     \putwordSection@tie \the\chapno.\the\secno.\the\subsecno
   7324   \else
   7325     \putwordSection@tie \the\chapno.\the\secno.\the\subsecno.\the\subsubsecno
   7326   \fi\fi\fi
   7327 }
   7328 \def\Yappendix{%
   7329   \ifnum\secno=0
   7330      \putwordAppendix@tie @char\the\appendixno{}%
   7331   \else \ifnum\subsecno=0
   7332      \putwordSection@tie @char\the\appendixno.\the\secno
   7333   \else \ifnum\subsubsecno=0
   7334     \putwordSection@tie @char\the\appendixno.\the\secno.\the\subsecno
   7335   \else
   7336     \putwordSection@tie
   7337       @char\the\appendixno.\the\secno.\the\subsecno.\the\subsubsecno
   7338   \fi\fi\fi
   7339 }
   7340 
   7341 % Define \refx{NAME}{SUFFIX} to reference a cross-reference string named NAME.
   7342 % If its value is nonempty, SUFFIX is output afterward.
   7343 %
   7344 \def\refx#1#2{%
   7345   {%
   7346     \indexnofonts
   7347     \otherbackslash
   7348     \expandafter\global\expandafter\let\expandafter\thisrefX
   7349       \csname XR#1\endcsname
   7350   }%
   7351   \ifx\thisrefX\relax
   7352     % If not defined, say something at least.
   7353     \angleleft un\-de\-fined\angleright
   7354     \iflinks
   7355       \ifhavexrefs
   7356         \message{\linenumber Undefined cross reference `#1'.}%
   7357       \else
   7358         \ifwarnedxrefs\else
   7359           \global\warnedxrefstrue
   7360           \message{Cross reference values unknown; you must run TeX again.}%
   7361         \fi
   7362       \fi
   7363     \fi
   7364   \else
   7365     % It's defined, so just use it.
   7366     \thisrefX
   7367   \fi
   7368   #2% Output the suffix in any case.
   7369 }
   7370 
   7371 % This is the macro invoked by entries in the aux file.  Usually it's
   7372 % just a \def (we prepend XR to the control sequence name to avoid
   7373 % collisions).  But if this is a float type, we have more work to do.
   7374 %
   7375 \def\xrdef#1#2{%
   7376   {% The node name might contain 8-bit characters, which in our current
   7377    % implementation are changed to commands like @'e.  Don't let these
   7378    % mess up the control sequence name.
   7379     \indexnofonts
   7380     \turnoffactive
   7381     \xdef\safexrefname{#1}%
   7382   }%
   7383   %
   7384   \expandafter\gdef\csname XR\safexrefname\endcsname{#2}% remember this xref
   7385   %
   7386   % Was that xref control sequence that we just defined for a float?
   7387   \expandafter\iffloat\csname XR\safexrefname\endcsname
   7388     % it was a float, and we have the (safe) float type in \iffloattype.
   7389     \expandafter\let\expandafter\floatlist
   7390       \csname floatlist\iffloattype\endcsname
   7391     %
   7392     % Is this the first time we've seen this float type?
   7393     \expandafter\ifx\floatlist\relax
   7394       \toks0 = {\do}% yes, so just \do
   7395     \else
   7396       % had it before, so preserve previous elements in list.
   7397       \toks0 = \expandafter{\floatlist\do}%
   7398     \fi
   7399     %
   7400     % Remember this xref in the control sequence \floatlistFLOATTYPE,
   7401     % for later use in \listoffloats.
   7402     \expandafter\xdef\csname floatlist\iffloattype\endcsname{\the\toks0
   7403       {\safexrefname}}%
   7404   \fi
   7405 }
   7406 
   7407 % Read the last existing aux file, if any.  No error if none exists.
   7408 %
   7409 \def\tryauxfile{%
   7410   \openin 1 \jobname.aux
   7411   \ifeof 1 \else
   7412     \readdatafile{aux}%
   7413     \global\havexrefstrue
   7414   \fi
   7415   \closein 1
   7416 }
   7417 
   7418 \def\setupdatafile{%
   7419   \catcode`\^^@=\other
   7420   \catcode`\^^A=\other
   7421   \catcode`\^^B=\other
   7422   \catcode`\^^C=\other
   7423   \catcode`\^^D=\other
   7424   \catcode`\^^E=\other
   7425   \catcode`\^^F=\other
   7426   \catcode`\^^G=\other
   7427   \catcode`\^^H=\other
   7428   \catcode`\^^K=\other
   7429   \catcode`\^^L=\other
   7430   \catcode`\^^N=\other
   7431   \catcode`\^^P=\other
   7432   \catcode`\^^Q=\other
   7433   \catcode`\^^R=\other
   7434   \catcode`\^^S=\other
   7435   \catcode`\^^T=\other
   7436   \catcode`\^^U=\other
   7437   \catcode`\^^V=\other
   7438   \catcode`\^^W=\other
   7439   \catcode`\^^X=\other
   7440   \catcode`\^^Z=\other
   7441   \catcode`\^^[=\other
   7442   \catcode`\^^\=\other
   7443   \catcode`\^^]=\other
   7444   \catcode`\^^^=\other
   7445   \catcode`\^^_=\other
   7446   % It was suggested to set the catcode of ^ to 7, which would allow ^^e4 etc.
   7447   % in xref tags, i.e., node names.  But since ^^e4 notation isn't
   7448   % supported in the main text, it doesn't seem desirable.  Furthermore,
   7449   % that is not enough: for node names that actually contain a ^
   7450   % character, we would end up writing a line like this: 'xrdef {'hat
   7451   % b-title}{'hat b} and \xrdef does a \csname...\endcsname on the first
   7452   % argument, and \hat is not an expandable control sequence.  It could
   7453   % all be worked out, but why?  Either we support ^^ or we don't.
   7454   %
   7455   % The other change necessary for this was to define \auxhat:
   7456   % \def\auxhat{\def^{'hat }}% extra space so ok if followed by letter
   7457   % and then to call \auxhat in \setq.
   7458   %
   7459   \catcode`\^=\other
   7460   %
   7461   % Special characters.  Should be turned off anyway, but...
   7462   \catcode`\~=\other
   7463   \catcode`\[=\other
   7464   \catcode`\]=\other
   7465   \catcode`\"=\other
   7466   \catcode`\_=\other
   7467   \catcode`\|=\other
   7468   \catcode`\<=\other
   7469   \catcode`\>=\other
   7470   \catcode`\$=\other
   7471   \catcode`\#=\other
   7472   \catcode`\&=\other
   7473   \catcode`\%=\other
   7474   \catcode`+=\other % avoid \+ for paranoia even though we've turned it off
   7475   %
   7476   % This is to support \ in node names and titles, since the \
   7477   % characters end up in a \csname.  It's easier than
   7478   % leaving it active and making its active definition an actual \
   7479   % character.  What I don't understand is why it works in the *value*
   7480   % of the xrdef.  Seems like it should be a catcode12 \, and that
   7481   % should not typeset properly.  But it works, so I'm moving on for
   7482   % now.  --karl, 15jan04.
   7483   \catcode`\\=\other
   7484   %
   7485   % Make the characters 128-255 be printing characters.
   7486   {%
   7487     \count1=128
   7488     \def\loop{%
   7489       \catcode\count1=\other
   7490       \advance\count1 by 1
   7491       \ifnum \count1<256 \loop \fi
   7492     }%
   7493   }%
   7494   %
   7495   % @ is our escape character in .aux files, and we need braces.
   7496   \catcode`\{=1
   7497   \catcode`\}=2
   7498   \catcode`\@=0
   7499 }
   7500 
   7501 \def\readdatafile#1{%
   7502 \begingroup
   7503   \setupdatafile
   7504   \input\jobname.#1
   7505 \endgroup}
   7506 
   7507 
   7508 \message{insertions,}
   7509 % including footnotes.
   7510 
   7511 \newcount \footnoteno
   7512 
   7513 % The trailing space in the following definition for supereject is
   7514 % vital for proper filling; pages come out unaligned when you do a
   7515 % pagealignmacro call if that space before the closing brace is
   7516 % removed. (Generally, numeric constants should always be followed by a
   7517 % space to prevent strange expansion errors.)
   7518 \def\supereject{\par\penalty -20000\footnoteno =0 }
   7519 
   7520 % @footnotestyle is meaningful for info output only.
   7521 \let\footnotestyle=\comment
   7522 
   7523 {\catcode `\@=11
   7524 %
   7525 % Auto-number footnotes.  Otherwise like plain.
   7526 \gdef\footnote{%
   7527   \let\indent=\ptexindent
   7528   \let\noindent=\ptexnoindent
   7529   \global\advance\footnoteno by \@ne
   7530   \edef\thisfootno{$^{\the\footnoteno}$}%
   7531   %
   7532   % In case the footnote comes at the end of a sentence, preserve the
   7533   % extra spacing after we do the footnote number.
   7534   \let\@sf\empty
   7535   \ifhmode\edef\@sf{\spacefactor\the\spacefactor}\ptexslash\fi
   7536   %
   7537   % Remove inadvertent blank space before typesetting the footnote number.
   7538   \unskip
   7539   \thisfootno\@sf
   7540   \dofootnote
   7541 }%
   7542 
   7543 % Don't bother with the trickery in plain.tex to not require the
   7544 % footnote text as a parameter.  Our footnotes don't need to be so general.
   7545 %
   7546 % Oh yes, they do; otherwise, @ifset (and anything else that uses
   7547 % \parseargline) fails inside footnotes because the tokens are fixed when
   7548 % the footnote is read.  --karl, 16nov96.
   7549 %
   7550 \gdef\dofootnote{%
   7551   \insert\footins\bgroup
   7552   % We want to typeset this text as a normal paragraph, even if the
   7553   % footnote reference occurs in (for example) a display environment.
   7554   % So reset some parameters.
   7555   \hsize=\pagewidth
   7556   \interlinepenalty\interfootnotelinepenalty
   7557   \splittopskip\ht\strutbox % top baseline for broken footnotes
   7558   \splitmaxdepth\dp\strutbox
   7559   \floatingpenalty\@MM
   7560   \leftskip\z@skip
   7561   \rightskip\z@skip
   7562   \spaceskip\z@skip
   7563   \xspaceskip\z@skip
   7564   \parindent\defaultparindent
   7565   %
   7566   \smallfonts \rm
   7567   %
   7568   % Because we use hanging indentation in footnotes, a @noindent appears
   7569   % to exdent this text, so make it be a no-op.  makeinfo does not use
   7570   % hanging indentation so @noindent can still be needed within footnote
   7571   % text after an @example or the like (not that this is good style).
   7572   \let\noindent = \relax
   7573   %
   7574   % Hang the footnote text off the number.  Use \everypar in case the
   7575   % footnote extends for more than one paragraph.
   7576   \everypar = {\hang}%
   7577   \textindent{\thisfootno}%
   7578   %
   7579   % Don't crash into the line above the footnote text.  Since this
   7580   % expands into a box, it must come within the paragraph, lest it
   7581   % provide a place where TeX can split the footnote.
   7582   \footstrut
   7583   \futurelet\next\fo@t
   7584 }
   7585 }%end \catcode `\@=11
   7586 
   7587 % In case a @footnote appears in a vbox, save the footnote text and create
   7588 % the real \insert just after the vbox finished.  Otherwise, the insertion
   7589 % would be lost.
   7590 % Similarly, if a @footnote appears inside an alignment, save the footnote
   7591 % text to a box and make the \insert when a row of the table is finished.
   7592 % And the same can be done for other insert classes.  --kasal, 16nov03.
   7593 
   7594 % Replace the \insert primitive by a cheating macro.
   7595 % Deeper inside, just make sure that the saved insertions are not spilled
   7596 % out prematurely.
   7597 %
   7598 \def\startsavinginserts{%
   7599   \ifx \insert\ptexinsert
   7600     \let\insert\saveinsert
   7601   \else
   7602     \let\checkinserts\relax
   7603   \fi
   7604 }
   7605 
   7606 % This \insert replacement works for both \insert\footins{foo} and
   7607 % \insert\footins\bgroup foo\egroup, but it doesn't work for \insert27{foo}.
   7608 %
   7609 \def\saveinsert#1{%
   7610   \edef\next{\noexpand\savetobox \makeSAVEname#1}%
   7611   \afterassignment\next
   7612   % swallow the left brace
   7613   \let\temp =
   7614 }
   7615 \def\makeSAVEname#1{\makecsname{SAVE\expandafter\gobble\string#1}}
   7616 \def\savetobox#1{\global\setbox#1 = \vbox\bgroup \unvbox#1}
   7617 
   7618 \def\checksaveins#1{\ifvoid#1\else \placesaveins#1\fi}
   7619 
   7620 \def\placesaveins#1{%
   7621   \ptexinsert \csname\expandafter\gobblesave\string#1\endcsname
   7622     {\box#1}%
   7623 }
   7624 
   7625 % eat @SAVE -- beware, all of them have catcode \other:
   7626 {
   7627   \def\dospecials{\do S\do A\do V\do E} \uncatcodespecials  %  ;-)
   7628   \gdef\gobblesave @SAVE{}
   7629 }
   7630 
   7631 % initialization:
   7632 \def\newsaveins #1{%
   7633   \edef\next{\noexpand\newsaveinsX \makeSAVEname#1}%
   7634   \next
   7635 }
   7636 \def\newsaveinsX #1{%
   7637   \csname newbox\endcsname #1%
   7638   \expandafter\def\expandafter\checkinserts\expandafter{\checkinserts
   7639     \checksaveins #1}%
   7640 }
   7641 
   7642 % initialize:
   7643 \let\checkinserts\empty
   7644 \newsaveins\footins
   7645 \newsaveins\margin
   7646 
   7647 
   7648 % @image.  We use the macros from epsf.tex to support this.
   7649 % If epsf.tex is not installed and @image is used, we complain.
   7650 %
   7651 % Check for and read epsf.tex up front.  If we read it only at @image
   7652 % time, we might be inside a group, and then its definitions would get
   7653 % undone and the next image would fail.
   7654 \openin 1 = epsf.tex
   7655 \ifeof 1 \else
   7656   % Do not bother showing banner with epsf.tex v2.7k (available in
   7657   % doc/epsf.tex and on ctan).
   7658   \def\epsfannounce{\toks0 = }%
   7659   \input epsf.tex
   7660 \fi
   7661 \closein 1
   7662 %
   7663 % We will only complain once about lack of epsf.tex.
   7664 \newif\ifwarnednoepsf
   7665 \newhelp\noepsfhelp{epsf.tex must be installed for images to
   7666   work.  It is also included in the Texinfo distribution, or you can get
   7667   it from ftp://tug.org/tex/epsf.tex.}
   7668 %
   7669 \def\image#1{%
   7670   \ifx\epsfbox\undefined
   7671     \ifwarnednoepsf \else
   7672       \errhelp = \noepsfhelp
   7673       \errmessage{epsf.tex not found, images will be ignored}%
   7674       \global\warnednoepsftrue
   7675     \fi
   7676   \else
   7677     \imagexxx #1,,,,,\finish
   7678   \fi
   7679 }
   7680 %
   7681 % Arguments to @image:
   7682 % #1 is (mandatory) image filename; we tack on .eps extension.
   7683 % #2 is (optional) width, #3 is (optional) height.
   7684 % #4 is (ignored optional) html alt text.
   7685 % #5 is (ignored optional) extension.
   7686 % #6 is just the usual extra ignored arg for parsing this stuff.
   7687 \newif\ifimagevmode
   7688 \def\imagexxx#1,#2,#3,#4,#5,#6\finish{\begingroup
   7689   \catcode`\^^M = 5     % in case we're inside an example
   7690   \normalturnoffactive  % allow _ et al. in names
   7691   % If the image is by itself, center it.
   7692   \ifvmode
   7693     \imagevmodetrue
   7694     \nobreak\medskip
   7695     % Usually we'll have text after the image which will insert
   7696     % \parskip glue, so insert it here too to equalize the space
   7697     % above and below.
   7698     \nobreak\vskip\parskip
   7699     \nobreak
   7700   \fi
   7701   %
   7702   % Leave vertical mode so that indentation from an enclosing
   7703   % environment such as @quotation is respected.  On the other hand, if
   7704   % it's at the top level, we don't want the normal paragraph indentation.
   7705   \noindent
   7706   %
   7707   % Output the image.
   7708   \ifpdf
   7709     \dopdfimage{#1}{#2}{#3}%
   7710   \else
   7711     % \epsfbox itself resets \epsf?size at each figure.
   7712     \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \epsfxsize=#2\relax \fi
   7713     \setbox0 = \hbox{\ignorespaces #3}\ifdim\wd0 > 0pt \epsfysize=#3\relax \fi
   7714     \epsfbox{#1.eps}%
   7715   \fi
   7716   %
   7717   \ifimagevmode \medskip \fi  % space after the standalone image
   7718 \endgroup}
   7719 
   7720 
   7721 % @float FLOATTYPE,LABEL,LOC ... @end float for displayed figures, tables,
   7722 % etc.  We don't actually implement floating yet, we always include the
   7723 % float "here".  But it seemed the best name for the future.
   7724 %
   7725 \envparseargdef\float{\eatcommaspace\eatcommaspace\dofloat#1, , ,\finish}
   7726 
   7727 % There may be a space before second and/or third parameter; delete it.
   7728 \def\eatcommaspace#1, {#1,}
   7729 
   7730 % #1 is the optional FLOATTYPE, the text label for this float, typically
   7731 % "Figure", "Table", "Example", etc.  Can't contain commas.  If omitted,
   7732 % this float will not be numbered and cannot be referred to.
   7733 %
   7734 % #2 is the optional xref label.  Also must be present for the float to
   7735 % be referable.
   7736 %
   7737 % #3 is the optional positioning argument; for now, it is ignored.  It
   7738 % will somehow specify the positions allowed to float to (here, top, bottom).
   7739 %
   7740 % We keep a separate counter for each FLOATTYPE, which we reset at each
   7741 % chapter-level command.
   7742 \let\resetallfloatnos=\empty
   7743 %
   7744 \def\dofloat#1,#2,#3,#4\finish{%
   7745   \let\thiscaption=\empty
   7746   \let\thisshortcaption=\empty
   7747   %
   7748   % don't lose footnotes inside @float.
   7749   %
   7750   % BEWARE: when the floats start float, we have to issue warning whenever an
   7751   % insert appears inside a float which could possibly float. --kasal, 26may04
   7752   %
   7753   \startsavinginserts
   7754   %
   7755   % We can't be used inside a paragraph.
   7756   \par
   7757   %
   7758   \vtop\bgroup
   7759     \def\floattype{#1}%
   7760     \def\floatlabel{#2}%
   7761     \def\floatloc{#3}% we do nothing with this yet.
   7762     %
   7763     \ifx\floattype\empty
   7764       \let\safefloattype=\empty
   7765     \else
   7766       {%
   7767         % the floattype might have accents or other special characters,
   7768         % but we need to use it in a control sequence name.
   7769         \indexnofonts
   7770         \turnoffactive
   7771         \xdef\safefloattype{\floattype}%
   7772       }%
   7773     \fi
   7774     %
   7775     % If label is given but no type, we handle that as the empty type.
   7776     \ifx\floatlabel\empty \else
   7777       % We want each FLOATTYPE to be numbered separately (Figure 1,
   7778       % Table 1, Figure 2, ...).  (And if no label, no number.)
   7779       %
   7780       \expandafter\getfloatno\csname\safefloattype floatno\endcsname
   7781       \global\advance\floatno by 1
   7782       %
   7783       {%
   7784         % This magic value for \lastsection is output by \setref as the
   7785         % XREFLABEL-title value.  \xrefX uses it to distinguish float
   7786         % labels (which have a completely different output format) from
   7787         % node and anchor labels.  And \xrdef uses it to construct the
   7788         % lists of floats.
   7789         %
   7790         \edef\lastsection{\floatmagic=\safefloattype}%
   7791         \setref{\floatlabel}{Yfloat}%
   7792       }%
   7793     \fi
   7794     %
   7795     % start with \parskip glue, I guess.
   7796     \vskip\parskip
   7797     %
   7798     % Don't suppress indentation if a float happens to start a section.
   7799     \restorefirstparagraphindent
   7800 }
   7801 
   7802 % we have these possibilities:
   7803 % @float Foo,lbl & @caption{Cap}: Foo 1.1: Cap
   7804 % @float Foo,lbl & no caption:    Foo 1.1
   7805 % @float Foo & @caption{Cap}:     Foo: Cap
   7806 % @float Foo & no caption:        Foo
   7807 % @float ,lbl & Caption{Cap}:     1.1: Cap
   7808 % @float ,lbl & no caption:       1.1
   7809 % @float & @caption{Cap}:         Cap
   7810 % @float & no caption:
   7811 %
   7812 \def\Efloat{%
   7813     \let\floatident = \empty
   7814     %
   7815     % In all cases, if we have a float type, it comes first.
   7816     \ifx\floattype\empty \else \def\floatident{\floattype}\fi
   7817     %
   7818     % If we have an xref label, the number comes next.
   7819     \ifx\floatlabel\empty \else
   7820       \ifx\floattype\empty \else % if also had float type, need tie first.
   7821         \appendtomacro\floatident{\tie}%
   7822       \fi
   7823       % the number.
   7824       \appendtomacro\floatident{\chaplevelprefix\the\floatno}%
   7825     \fi
   7826     %
   7827     % Start the printed caption with what we've constructed in
   7828     % \floatident, but keep it separate; we need \floatident again.
   7829     \let\captionline = \floatident
   7830     %
   7831     \ifx\thiscaption\empty \else
   7832       \ifx\floatident\empty \else
   7833 	\appendtomacro\captionline{: }% had ident, so need a colon between
   7834       \fi
   7835       %
   7836       % caption text.
   7837       \appendtomacro\captionline{\scanexp\thiscaption}%
   7838     \fi
   7839     %
   7840     % If we have anything to print, print it, with space before.
   7841     % Eventually this needs to become an \insert.
   7842     \ifx\captionline\empty \else
   7843       \vskip.5\parskip
   7844       \captionline
   7845       %
   7846       % Space below caption.
   7847       \vskip\parskip
   7848     \fi
   7849     %
   7850     % If have an xref label, write the list of floats info.  Do this
   7851     % after the caption, to avoid chance of it being a breakpoint.
   7852     \ifx\floatlabel\empty \else
   7853       % Write the text that goes in the lof to the aux file as
   7854       % \floatlabel-lof.  Besides \floatident, we include the short
   7855       % caption if specified, else the full caption if specified, else nothing.
   7856       {%
   7857         \atdummies
   7858         %
   7859         % since we read the caption text in the macro world, where ^^M
   7860         % is turned into a normal character, we have to scan it back, so
   7861         % we don't write the literal three characters "^^M" into the aux file.
   7862 	\scanexp{%
   7863 	  \xdef\noexpand\gtemp{%
   7864 	    \ifx\thisshortcaption\empty
   7865 	      \thiscaption
   7866 	    \else
   7867 	      \thisshortcaption
   7868 	    \fi
   7869 	  }%
   7870 	}%
   7871         \immediate\write\auxfile{@xrdef{\floatlabel-lof}{\floatident
   7872 	  \ifx\gtemp\empty \else : \gtemp \fi}}%
   7873       }%
   7874     \fi
   7875   \egroup  % end of \vtop
   7876   %
   7877   % place the captured inserts
   7878   %
   7879   % BEWARE: when the floats start floating, we have to issue warning
   7880   % whenever an insert appears inside a float which could possibly
   7881   % float. --kasal, 26may04
   7882   %
   7883   \checkinserts
   7884 }
   7885 
   7886 % Append the tokens #2 to the definition of macro #1, not expanding either.
   7887 %
   7888 \def\appendtomacro#1#2{%
   7889   \expandafter\def\expandafter#1\expandafter{#1#2}%
   7890 }
   7891 
   7892 % @caption, @shortcaption
   7893 %
   7894 \def\caption{\docaption\thiscaption}
   7895 \def\shortcaption{\docaption\thisshortcaption}
   7896 \def\docaption{\checkenv\float \bgroup\scanargctxt\defcaption}
   7897 \def\defcaption#1#2{\egroup \def#1{#2}}
   7898 
   7899 % The parameter is the control sequence identifying the counter we are
   7900 % going to use.  Create it if it doesn't exist and assign it to \floatno.
   7901 \def\getfloatno#1{%
   7902   \ifx#1\relax
   7903       % Haven't seen this figure type before.
   7904       \csname newcount\endcsname #1%
   7905       %
   7906       % Remember to reset this floatno at the next chap.
   7907       \expandafter\gdef\expandafter\resetallfloatnos
   7908         \expandafter{\resetallfloatnos #1=0 }%
   7909   \fi
   7910   \let\floatno#1%
   7911 }
   7912 
   7913 % \setref calls this to get the XREFLABEL-snt value.  We want an @xref
   7914 % to the FLOATLABEL to expand to "Figure 3.1".  We call \setref when we
   7915 % first read the @float command.
   7916 %
   7917 \def\Yfloat{\floattype@tie \chaplevelprefix\the\floatno}%
   7918 
   7919 % Magic string used for the XREFLABEL-title value, so \xrefX can
   7920 % distinguish floats from other xref types.
   7921 \def\floatmagic{!!float!!}
   7922 
   7923 % #1 is the control sequence we are passed; we expand into a conditional
   7924 % which is true if #1 represents a float ref.  That is, the magic
   7925 % \lastsection value which we \setref above.
   7926 %
   7927 \def\iffloat#1{\expandafter\doiffloat#1==\finish}
   7928 %
   7929 % #1 is (maybe) the \floatmagic string.  If so, #2 will be the
   7930 % (safe) float type for this float.  We set \iffloattype to #2.
   7931 %
   7932 \def\doiffloat#1=#2=#3\finish{%
   7933   \def\temp{#1}%
   7934   \def\iffloattype{#2}%
   7935   \ifx\temp\floatmagic
   7936 }
   7937 
   7938 % @listoffloats FLOATTYPE - print a list of floats like a table of contents.
   7939 %
   7940 \parseargdef\listoffloats{%
   7941   \def\floattype{#1}% floattype
   7942   {%
   7943     % the floattype might have accents or other special characters,
   7944     % but we need to use it in a control sequence name.
   7945     \indexnofonts
   7946     \turnoffactive
   7947     \xdef\safefloattype{\floattype}%
   7948   }%
   7949   %
   7950   % \xrdef saves the floats as a \do-list in \floatlistSAFEFLOATTYPE.
   7951   \expandafter\ifx\csname floatlist\safefloattype\endcsname \relax
   7952     \ifhavexrefs
   7953       % if the user said @listoffloats foo but never @float foo.
   7954       \message{\linenumber No `\safefloattype' floats to list.}%
   7955     \fi
   7956   \else
   7957     \begingroup
   7958       \leftskip=\tocindent  % indent these entries like a toc
   7959       \let\do=\listoffloatsdo
   7960       \csname floatlist\safefloattype\endcsname
   7961     \endgroup
   7962   \fi
   7963 }
   7964 
   7965 % This is called on each entry in a list of floats.  We're passed the
   7966 % xref label, in the form LABEL-title, which is how we save it in the
   7967 % aux file.  We strip off the -title and look up \XRLABEL-lof, which
   7968 % has the text we're supposed to typeset here.
   7969 %
   7970 % Figures without xref labels will not be included in the list (since
   7971 % they won't appear in the aux file).
   7972 %
   7973 \def\listoffloatsdo#1{\listoffloatsdoentry#1\finish}
   7974 \def\listoffloatsdoentry#1-title\finish{{%
   7975   % Can't fully expand XR#1-lof because it can contain anything.  Just
   7976   % pass the control sequence.  On the other hand, XR#1-pg is just the
   7977   % page number, and we want to fully expand that so we can get a link
   7978   % in pdf output.
   7979   \toksA = \expandafter{\csname XR#1-lof\endcsname}%
   7980   %
   7981   % use the same \entry macro we use to generate the TOC and index.
   7982   \edef\writeentry{\noexpand\entry{\the\toksA}{\csname XR#1-pg\endcsname}}%
   7983   \writeentry
   7984 }}
   7985 
   7986 
   7987 \message{localization,}
   7988 
   7989 % For single-language documents, @documentlanguage is usually given very
   7990 % early, just after @documentencoding.  Single argument is the language
   7991 % (de) or locale (de_DE) abbreviation.
   7992 %
   7993 {
   7994   \catcode`\_ = \active
   7995   \globaldefs=1
   7996 \parseargdef\documentlanguage{\begingroup
   7997   \let_=\normalunderscore  % normal _ character for filenames
   7998   \tex % read txi-??.tex file in plain TeX.
   7999     % Read the file by the name they passed if it exists.
   8000     \openin 1 txi-#1.tex
   8001     \ifeof 1
   8002       \documentlanguagetrywithoutunderscore{#1_\finish}%
   8003     \else
   8004       \globaldefs = 1  % everything in the txi-LL files needs to persist
   8005       \input txi-#1.tex
   8006     \fi
   8007     \closein 1
   8008   \endgroup % end raw TeX
   8009 \endgroup}
   8010 %
   8011 % If they passed de_DE, and txi-de_DE.tex doesn't exist,
   8012 % try txi-de.tex.
   8013 %
   8014 \gdef\documentlanguagetrywithoutunderscore#1_#2\finish{%
   8015   \openin 1 txi-#1.tex
   8016   \ifeof 1
   8017     \errhelp = \nolanghelp
   8018     \errmessage{Cannot read language file txi-#1.tex}%
   8019   \else
   8020     \globaldefs = 1  % everything in the txi-LL files needs to persist
   8021     \input txi-#1.tex
   8022   \fi
   8023   \closein 1
   8024 }
   8025 }% end of special _ catcode
   8026 %
   8027 \newhelp\nolanghelp{The given language definition file cannot be found or
   8028 is empty.  Maybe you need to install it?  Putting it in the current
   8029 directory should work if nowhere else does.}
   8030 
   8031 % This macro is called from txi-??.tex files; the first argument is the
   8032 % \language name to set (without the "\lang@" prefix), the second and
   8033 % third args are \{left,right}hyphenmin.
   8034 %
   8035 % The language names to pass are determined when the format is built.
   8036 % See the etex.log file created at that time, e.g.,
   8037 % /usr/local/texlive/2008/texmf-var/web2c/pdftex/etex.log.
   8038 %
   8039 % With TeX Live 2008, etex now includes hyphenation patterns for all
   8040 % available languages.  This means we can support hyphenation in
   8041 % Texinfo, at least to some extent.  (This still doesn't solve the
   8042 % accented characters problem.)
   8043 %
   8044 \catcode`@=11
   8045 \def\txisetlanguage#1#2#3{%
   8046   % do not set the language if the name is undefined in the current TeX.
   8047   \expandafter\ifx\csname lang@#1\endcsname \relax
   8048     \message{no patterns for #1}%
   8049   \else
   8050     \global\language = \csname lang@#1\endcsname
   8051   \fi
   8052   % but there is no harm in adjusting the hyphenmin values regardless.
   8053   \global\lefthyphenmin = #2\relax
   8054   \global\righthyphenmin = #3\relax
   8055 }
   8056 
   8057 % Helpers for encodings.
   8058 % Set the catcode of characters 128 through 255 to the specified number.
   8059 %
   8060 \def\setnonasciicharscatcode#1{%
   8061    \count255=128
   8062    \loop\ifnum\count255<256
   8063       \global\catcode\count255=#1\relax
   8064       \advance\count255 by 1
   8065    \repeat
   8066 }
   8067 
   8068 \def\setnonasciicharscatcodenonglobal#1{%
   8069    \count255=128
   8070    \loop\ifnum\count255<256
   8071       \catcode\count255=#1\relax
   8072       \advance\count255 by 1
   8073    \repeat
   8074 }
   8075 
   8076 % @documentencoding sets the definition of non-ASCII characters
   8077 % according to the specified encoding.
   8078 %
   8079 \parseargdef\documentencoding{%
   8080   % Encoding being declared for the document.
   8081   \def\declaredencoding{\csname #1.enc\endcsname}%
   8082   %
   8083   % Supported encodings: names converted to tokens in order to be able
   8084   % to compare them with \ifx.
   8085   \def\ascii{\csname US-ASCII.enc\endcsname}%
   8086   \def\latnine{\csname ISO-8859-15.enc\endcsname}%
   8087   \def\latone{\csname ISO-8859-1.enc\endcsname}%
   8088   \def\lattwo{\csname ISO-8859-2.enc\endcsname}%
   8089   \def\utfeight{\csname UTF-8.enc\endcsname}%
   8090   %
   8091   \ifx \declaredencoding \ascii
   8092      \asciichardefs
   8093   %
   8094   \else \ifx \declaredencoding \lattwo
   8095      \setnonasciicharscatcode\active
   8096      \lattwochardefs
   8097   %
   8098   \else \ifx \declaredencoding \latone
   8099      \setnonasciicharscatcode\active
   8100      \latonechardefs
   8101   %
   8102   \else \ifx \declaredencoding \latnine
   8103      \setnonasciicharscatcode\active
   8104      \latninechardefs
   8105   %
   8106   \else \ifx \declaredencoding \utfeight
   8107      \setnonasciicharscatcode\active
   8108      \utfeightchardefs
   8109   %
   8110   \else
   8111     \message{Unknown document encoding #1, ignoring.}%
   8112   %
   8113   \fi % utfeight
   8114   \fi % latnine
   8115   \fi % latone
   8116   \fi % lattwo
   8117   \fi % ascii
   8118 }
   8119 
   8120 % A message to be logged when using a character that isn't available
   8121 % the default font encoding (OT1).
   8122 %
   8123 \def\missingcharmsg#1{\message{Character missing in OT1 encoding: #1.}}
   8124 
   8125 % Take account of \c (plain) vs. \, (Texinfo) difference.
   8126 \def\cedilla#1{\ifx\c\ptexc\c{#1}\else\,{#1}\fi}
   8127 
   8128 % First, make active non-ASCII characters in order for them to be
   8129 % correctly categorized when TeX reads the replacement text of
   8130 % macros containing the character definitions.
   8131 \setnonasciicharscatcode\active
   8132 %
   8133 % Latin1 (ISO-8859-1) character definitions.
   8134 \def\latonechardefs{%
   8135   \gdef^^a0{~}
   8136   \gdef^^a1{\exclamdown}
   8137   \gdef^^a2{\missingcharmsg{CENT SIGN}}
   8138   \gdef^^a3{{\pounds}}
   8139   \gdef^^a4{\missingcharmsg{CURRENCY SIGN}}
   8140   \gdef^^a5{\missingcharmsg{YEN SIGN}}
   8141   \gdef^^a6{\missingcharmsg{BROKEN BAR}}
   8142   \gdef^^a7{\S}
   8143   \gdef^^a8{\"{}}
   8144   \gdef^^a9{\copyright}
   8145   \gdef^^aa{\ordf}
   8146   \gdef^^ab{\guillemetleft}
   8147   \gdef^^ac{$\lnot$}
   8148   \gdef^^ad{\-}
   8149   \gdef^^ae{\registeredsymbol}
   8150   \gdef^^af{\={}}
   8151   %
   8152   \gdef^^b0{\textdegree}
   8153   \gdef^^b1{$\pm$}
   8154   \gdef^^b2{$^2$}
   8155   \gdef^^b3{$^3$}
   8156   \gdef^^b4{\'{}}
   8157   \gdef^^b5{$\mu$}
   8158   \gdef^^b6{\P}
   8159   %
   8160   \gdef^^b7{$^.$}
   8161   \gdef^^b8{\cedilla\ }
   8162   \gdef^^b9{$^1$}
   8163   \gdef^^ba{\ordm}
   8164   %
   8165   \gdef^^bb{\guilletright}
   8166   \gdef^^bc{$1\over4$}
   8167   \gdef^^bd{$1\over2$}
   8168   \gdef^^be{$3\over4$}
   8169   \gdef^^bf{\questiondown}
   8170   %
   8171   \gdef^^c0{\`A}
   8172   \gdef^^c1{\'A}
   8173   \gdef^^c2{\^A}
   8174   \gdef^^c3{\~A}
   8175   \gdef^^c4{\"A}
   8176   \gdef^^c5{\ringaccent A}
   8177   \gdef^^c6{\AE}
   8178   \gdef^^c7{\cedilla C}
   8179   \gdef^^c8{\`E}
   8180   \gdef^^c9{\'E}
   8181   \gdef^^ca{\^E}
   8182   \gdef^^cb{\"E}
   8183   \gdef^^cc{\`I}
   8184   \gdef^^cd{\'I}
   8185   \gdef^^ce{\^I}
   8186   \gdef^^cf{\"I}
   8187   %
   8188   \gdef^^d0{\DH}
   8189   \gdef^^d1{\~N}
   8190   \gdef^^d2{\`O}
   8191   \gdef^^d3{\'O}
   8192   \gdef^^d4{\^O}
   8193   \gdef^^d5{\~O}
   8194   \gdef^^d6{\"O}
   8195   \gdef^^d7{$\times$}
   8196   \gdef^^d8{\O}
   8197   \gdef^^d9{\`U}
   8198   \gdef^^da{\'U}
   8199   \gdef^^db{\^U}
   8200   \gdef^^dc{\"U}
   8201   \gdef^^dd{\'Y}
   8202   \gdef^^de{\TH}
   8203   \gdef^^df{\ss}
   8204   %
   8205   \gdef^^e0{\`a}
   8206   \gdef^^e1{\'a}
   8207   \gdef^^e2{\^a}
   8208   \gdef^^e3{\~a}
   8209   \gdef^^e4{\"a}
   8210   \gdef^^e5{\ringaccent a}
   8211   \gdef^^e6{\ae}
   8212   \gdef^^e7{\cedilla c}
   8213   \gdef^^e8{\`e}
   8214   \gdef^^e9{\'e}
   8215   \gdef^^ea{\^e}
   8216   \gdef^^eb{\"e}
   8217   \gdef^^ec{\`{\dotless i}}
   8218   \gdef^^ed{\'{\dotless i}}
   8219   \gdef^^ee{\^{\dotless i}}
   8220   \gdef^^ef{\"{\dotless i}}
   8221   %
   8222   \gdef^^f0{\dh}
   8223   \gdef^^f1{\~n}
   8224   \gdef^^f2{\`o}
   8225   \gdef^^f3{\'o}
   8226   \gdef^^f4{\^o}
   8227   \gdef^^f5{\~o}
   8228   \gdef^^f6{\"o}
   8229   \gdef^^f7{$\div$}
   8230   \gdef^^f8{\o}
   8231   \gdef^^f9{\`u}
   8232   \gdef^^fa{\'u}
   8233   \gdef^^fb{\^u}
   8234   \gdef^^fc{\"u}
   8235   \gdef^^fd{\'y}
   8236   \gdef^^fe{\th}
   8237   \gdef^^ff{\"y}
   8238 }
   8239 
   8240 % Latin9 (ISO-8859-15) encoding character definitions.
   8241 \def\latninechardefs{%
   8242   % Encoding is almost identical to Latin1.
   8243   \latonechardefs
   8244   %
   8245   \gdef^^a4{\euro}
   8246   \gdef^^a6{\v S}
   8247   \gdef^^a8{\v s}
   8248   \gdef^^b4{\v Z}
   8249   \gdef^^b8{\v z}
   8250   \gdef^^bc{\OE}
   8251   \gdef^^bd{\oe}
   8252   \gdef^^be{\"Y}
   8253 }
   8254 
   8255 % Latin2 (ISO-8859-2) character definitions.
   8256 \def\lattwochardefs{%
   8257   \gdef^^a0{~}
   8258   \gdef^^a1{\ogonek{A}}
   8259   \gdef^^a2{\u{}}
   8260   \gdef^^a3{\L}
   8261   \gdef^^a4{\missingcharmsg{CURRENCY SIGN}}
   8262   \gdef^^a5{\v L}
   8263   \gdef^^a6{\'S}
   8264   \gdef^^a7{\S}
   8265   \gdef^^a8{\"{}}
   8266   \gdef^^a9{\v S}
   8267   \gdef^^aa{\cedilla S}
   8268   \gdef^^ab{\v T}
   8269   \gdef^^ac{\'Z}
   8270   \gdef^^ad{\-}
   8271   \gdef^^ae{\v Z}
   8272   \gdef^^af{\dotaccent Z}
   8273   %
   8274   \gdef^^b0{\textdegree}
   8275   \gdef^^b1{\ogonek{a}}
   8276   \gdef^^b2{\ogonek{ }}
   8277   \gdef^^b3{\l}
   8278   \gdef^^b4{\'{}}
   8279   \gdef^^b5{\v l}
   8280   \gdef^^b6{\'s}
   8281   \gdef^^b7{\v{}}
   8282   \gdef^^b8{\cedilla\ }
   8283   \gdef^^b9{\v s}
   8284   \gdef^^ba{\cedilla s}
   8285   \gdef^^bb{\v t}
   8286   \gdef^^bc{\'z}
   8287   \gdef^^bd{\H{}}
   8288   \gdef^^be{\v z}
   8289   \gdef^^bf{\dotaccent z}
   8290   %
   8291   \gdef^^c0{\'R}
   8292   \gdef^^c1{\'A}
   8293   \gdef^^c2{\^A}
   8294   \gdef^^c3{\u A}
   8295   \gdef^^c4{\"A}
   8296   \gdef^^c5{\'L}
   8297   \gdef^^c6{\'C}
   8298   \gdef^^c7{\cedilla C}
   8299   \gdef^^c8{\v C}
   8300   \gdef^^c9{\'E}
   8301   \gdef^^ca{\ogonek{E}}
   8302   \gdef^^cb{\"E}
   8303   \gdef^^cc{\v E}
   8304   \gdef^^cd{\'I}
   8305   \gdef^^ce{\^I}
   8306   \gdef^^cf{\v D}
   8307   %
   8308   \gdef^^d0{\DH}
   8309   \gdef^^d1{\'N}
   8310   \gdef^^d2{\v N}
   8311   \gdef^^d3{\'O}
   8312   \gdef^^d4{\^O}
   8313   \gdef^^d5{\H O}
   8314   \gdef^^d6{\"O}
   8315   \gdef^^d7{$\times$}
   8316   \gdef^^d8{\v R}
   8317   \gdef^^d9{\ringaccent U}
   8318   \gdef^^da{\'U}
   8319   \gdef^^db{\H U}
   8320   \gdef^^dc{\"U}
   8321   \gdef^^dd{\'Y}
   8322   \gdef^^de{\cedilla T}
   8323   \gdef^^df{\ss}
   8324   %
   8325   \gdef^^e0{\'r}
   8326   \gdef^^e1{\'a}
   8327   \gdef^^e2{\^a}
   8328   \gdef^^e3{\u a}
   8329   \gdef^^e4{\"a}
   8330   \gdef^^e5{\'l}
   8331   \gdef^^e6{\'c}
   8332   \gdef^^e7{\cedilla c}
   8333   \gdef^^e8{\v c}
   8334   \gdef^^e9{\'e}
   8335   \gdef^^ea{\ogonek{e}}
   8336   \gdef^^eb{\"e}
   8337   \gdef^^ec{\v e}
   8338   \gdef^^ed{\'\i}
   8339   \gdef^^ee{\^\i}
   8340   \gdef^^ef{\v d}
   8341   %
   8342   \gdef^^f0{\dh}
   8343   \gdef^^f1{\'n}
   8344   \gdef^^f2{\v n}
   8345   \gdef^^f3{\'o}
   8346   \gdef^^f4{\^o}
   8347   \gdef^^f5{\H o}
   8348   \gdef^^f6{\"o}
   8349   \gdef^^f7{$\div$}
   8350   \gdef^^f8{\v r}
   8351   \gdef^^f9{\ringaccent u}
   8352   \gdef^^fa{\'u}
   8353   \gdef^^fb{\H u}
   8354   \gdef^^fc{\"u}
   8355   \gdef^^fd{\'y}
   8356   \gdef^^fe{\cedilla t}
   8357   \gdef^^ff{\dotaccent{}}
   8358 }
   8359 
   8360 % UTF-8 character definitions.
   8361 %
   8362 % This code to support UTF-8 is based on LaTeX's utf8.def, with some
   8363 % changes for Texinfo conventions.  It is included here under the GPL by
   8364 % permission from Frank Mittelbach and the LaTeX team.
   8365 %
   8366 \newcount\countUTFx
   8367 \newcount\countUTFy
   8368 \newcount\countUTFz
   8369 
   8370 \gdef\UTFviiiTwoOctets#1#2{\expandafter
   8371    \UTFviiiDefined\csname u8:#1\string #2\endcsname}
   8372 %
   8373 \gdef\UTFviiiThreeOctets#1#2#3{\expandafter
   8374    \UTFviiiDefined\csname u8:#1\string #2\string #3\endcsname}
   8375 %
   8376 \gdef\UTFviiiFourOctets#1#2#3#4{\expandafter
   8377    \UTFviiiDefined\csname u8:#1\string #2\string #3\string #4\endcsname}
   8378 
   8379 \gdef\UTFviiiDefined#1{%
   8380   \ifx #1\relax
   8381     \message{\linenumber Unicode char \string #1 not defined for Texinfo}%
   8382   \else
   8383     \expandafter #1%
   8384   \fi
   8385 }
   8386 
   8387 \begingroup
   8388   \catcode`\~13
   8389   \catcode`\"12
   8390 
   8391   \def\UTFviiiLoop{%
   8392     \global\catcode\countUTFx\active
   8393     \uccode`\~\countUTFx
   8394     \uppercase\expandafter{\UTFviiiTmp}%
   8395     \advance\countUTFx by 1
   8396     \ifnum\countUTFx < \countUTFy
   8397       \expandafter\UTFviiiLoop
   8398     \fi}
   8399 
   8400   \countUTFx = "C2
   8401   \countUTFy = "E0
   8402   \def\UTFviiiTmp{%
   8403     \xdef~{\noexpand\UTFviiiTwoOctets\string~}}
   8404   \UTFviiiLoop
   8405 
   8406   \countUTFx = "E0
   8407   \countUTFy = "F0
   8408   \def\UTFviiiTmp{%
   8409     \xdef~{\noexpand\UTFviiiThreeOctets\string~}}
   8410   \UTFviiiLoop
   8411 
   8412   \countUTFx = "F0
   8413   \countUTFy = "F4
   8414   \def\UTFviiiTmp{%
   8415     \xdef~{\noexpand\UTFviiiFourOctets\string~}}
   8416   \UTFviiiLoop
   8417 \endgroup
   8418 
   8419 \begingroup
   8420   \catcode`\"=12
   8421   \catcode`\<=12
   8422   \catcode`\.=12
   8423   \catcode`\,=12
   8424   \catcode`\;=12
   8425   \catcode`\!=12
   8426   \catcode`\~=13
   8427 
   8428   \gdef\DeclareUnicodeCharacter#1#2{%
   8429     \countUTFz = "#1\relax
   8430     \wlog{\space\space defining Unicode char U+#1 (decimal \the\countUTFz)}%
   8431     \begingroup
   8432       \parseXMLCharref
   8433       \def\UTFviiiTwoOctets##1##2{%
   8434         \csname u8:##1\string ##2\endcsname}%
   8435       \def\UTFviiiThreeOctets##1##2##3{%
   8436         \csname u8:##1\string ##2\string ##3\endcsname}%
   8437       \def\UTFviiiFourOctets##1##2##3##4{%
   8438         \csname u8:##1\string ##2\string ##3\string ##4\endcsname}%
   8439       \expandafter\expandafter\expandafter\expandafter
   8440        \expandafter\expandafter\expandafter
   8441        \gdef\UTFviiiTmp{#2}%
   8442     \endgroup}
   8443 
   8444   \gdef\parseXMLCharref{%
   8445     \ifnum\countUTFz < "A0\relax
   8446       \errhelp = \EMsimple
   8447       \errmessage{Cannot define Unicode char value < 00A0}%
   8448     \else\ifnum\countUTFz < "800\relax
   8449       \parseUTFviiiA,%
   8450       \parseUTFviiiB C\UTFviiiTwoOctets.,%
   8451     \else\ifnum\countUTFz < "10000\relax
   8452       \parseUTFviiiA;%
   8453       \parseUTFviiiA,%
   8454       \parseUTFviiiB E\UTFviiiThreeOctets.{,;}%
   8455     \else
   8456       \parseUTFviiiA;%
   8457       \parseUTFviiiA,%
   8458       \parseUTFviiiA!%
   8459       \parseUTFviiiB F\UTFviiiFourOctets.{!,;}%
   8460     \fi\fi\fi
   8461   }
   8462 
   8463   \gdef\parseUTFviiiA#1{%
   8464     \countUTFx = \countUTFz
   8465     \divide\countUTFz by 64
   8466     \countUTFy = \countUTFz
   8467     \multiply\countUTFz by 64
   8468     \advance\countUTFx by -\countUTFz
   8469     \advance\countUTFx by 128
   8470     \uccode `#1\countUTFx
   8471     \countUTFz = \countUTFy}
   8472 
   8473   \gdef\parseUTFviiiB#1#2#3#4{%
   8474     \advance\countUTFz by "#10\relax
   8475     \uccode `#3\countUTFz
   8476     \uppercase{\gdef\UTFviiiTmp{#2#3#4}}}
   8477 \endgroup
   8478 
   8479 \def\utfeightchardefs{%
   8480   \DeclareUnicodeCharacter{00A0}{\tie}
   8481   \DeclareUnicodeCharacter{00A1}{\exclamdown}
   8482   \DeclareUnicodeCharacter{00A3}{\pounds}
   8483   \DeclareUnicodeCharacter{00A8}{\"{ }}
   8484   \DeclareUnicodeCharacter{00A9}{\copyright}
   8485   \DeclareUnicodeCharacter{00AA}{\ordf}
   8486   \DeclareUnicodeCharacter{00AB}{\guillemetleft}
   8487   \DeclareUnicodeCharacter{00AD}{\-}
   8488   \DeclareUnicodeCharacter{00AE}{\registeredsymbol}
   8489   \DeclareUnicodeCharacter{00AF}{\={ }}
   8490 
   8491   \DeclareUnicodeCharacter{00B0}{\ringaccent{ }}
   8492   \DeclareUnicodeCharacter{00B4}{\'{ }}
   8493   \DeclareUnicodeCharacter{00B8}{\cedilla{ }}
   8494   \DeclareUnicodeCharacter{00BA}{\ordm}
   8495   \DeclareUnicodeCharacter{00BB}{\guillemetright}
   8496   \DeclareUnicodeCharacter{00BF}{\questiondown}
   8497 
   8498   \DeclareUnicodeCharacter{00C0}{\`A}
   8499   \DeclareUnicodeCharacter{00C1}{\'A}
   8500   \DeclareUnicodeCharacter{00C2}{\^A}
   8501   \DeclareUnicodeCharacter{00C3}{\~A}
   8502   \DeclareUnicodeCharacter{00C4}{\"A}
   8503   \DeclareUnicodeCharacter{00C5}{\AA}
   8504   \DeclareUnicodeCharacter{00C6}{\AE}
   8505   \DeclareUnicodeCharacter{00C7}{\cedilla{C}}
   8506   \DeclareUnicodeCharacter{00C8}{\`E}
   8507   \DeclareUnicodeCharacter{00C9}{\'E}
   8508   \DeclareUnicodeCharacter{00CA}{\^E}
   8509   \DeclareUnicodeCharacter{00CB}{\"E}
   8510   \DeclareUnicodeCharacter{00CC}{\`I}
   8511   \DeclareUnicodeCharacter{00CD}{\'I}
   8512   \DeclareUnicodeCharacter{00CE}{\^I}
   8513   \DeclareUnicodeCharacter{00CF}{\"I}
   8514 
   8515   \DeclareUnicodeCharacter{00D0}{\DH}
   8516   \DeclareUnicodeCharacter{00D1}{\~N}
   8517   \DeclareUnicodeCharacter{00D2}{\`O}
   8518   \DeclareUnicodeCharacter{00D3}{\'O}
   8519   \DeclareUnicodeCharacter{00D4}{\^O}
   8520   \DeclareUnicodeCharacter{00D5}{\~O}
   8521   \DeclareUnicodeCharacter{00D6}{\"O}
   8522   \DeclareUnicodeCharacter{00D8}{\O}
   8523   \DeclareUnicodeCharacter{00D9}{\`U}
   8524   \DeclareUnicodeCharacter{00DA}{\'U}
   8525   \DeclareUnicodeCharacter{00DB}{\^U}
   8526   \DeclareUnicodeCharacter{00DC}{\"U}
   8527   \DeclareUnicodeCharacter{00DD}{\'Y}
   8528   \DeclareUnicodeCharacter{00DE}{\TH}
   8529   \DeclareUnicodeCharacter{00DF}{\ss}
   8530 
   8531   \DeclareUnicodeCharacter{00E0}{\`a}
   8532   \DeclareUnicodeCharacter{00E1}{\'a}
   8533   \DeclareUnicodeCharacter{00E2}{\^a}
   8534   \DeclareUnicodeCharacter{00E3}{\~a}
   8535   \DeclareUnicodeCharacter{00E4}{\"a}
   8536   \DeclareUnicodeCharacter{00E5}{\aa}
   8537   \DeclareUnicodeCharacter{00E6}{\ae}
   8538   \DeclareUnicodeCharacter{00E7}{\cedilla{c}}
   8539   \DeclareUnicodeCharacter{00E8}{\`e}
   8540   \DeclareUnicodeCharacter{00E9}{\'e}
   8541   \DeclareUnicodeCharacter{00EA}{\^e}
   8542   \DeclareUnicodeCharacter{00EB}{\"e}
   8543   \DeclareUnicodeCharacter{00EC}{\`{\dotless{i}}}
   8544   \DeclareUnicodeCharacter{00ED}{\'{\dotless{i}}}
   8545   \DeclareUnicodeCharacter{00EE}{\^{\dotless{i}}}
   8546   \DeclareUnicodeCharacter{00EF}{\"{\dotless{i}}}
   8547 
   8548   \DeclareUnicodeCharacter{00F0}{\dh}
   8549   \DeclareUnicodeCharacter{00F1}{\~n}
   8550   \DeclareUnicodeCharacter{00F2}{\`o}
   8551   \DeclareUnicodeCharacter{00F3}{\'o}
   8552   \DeclareUnicodeCharacter{00F4}{\^o}
   8553   \DeclareUnicodeCharacter{00F5}{\~o}
   8554   \DeclareUnicodeCharacter{00F6}{\"o}
   8555   \DeclareUnicodeCharacter{00F8}{\o}
   8556   \DeclareUnicodeCharacter{00F9}{\`u}
   8557   \DeclareUnicodeCharacter{00FA}{\'u}
   8558   \DeclareUnicodeCharacter{00FB}{\^u}
   8559   \DeclareUnicodeCharacter{00FC}{\"u}
   8560   \DeclareUnicodeCharacter{00FD}{\'y}
   8561   \DeclareUnicodeCharacter{00FE}{\th}
   8562   \DeclareUnicodeCharacter{00FF}{\"y}
   8563 
   8564   \DeclareUnicodeCharacter{0100}{\=A}
   8565   \DeclareUnicodeCharacter{0101}{\=a}
   8566   \DeclareUnicodeCharacter{0102}{\u{A}}
   8567   \DeclareUnicodeCharacter{0103}{\u{a}}
   8568   \DeclareUnicodeCharacter{0104}{\ogonek{A}}
   8569   \DeclareUnicodeCharacter{0105}{\ogonek{a}}
   8570   \DeclareUnicodeCharacter{0106}{\'C}
   8571   \DeclareUnicodeCharacter{0107}{\'c}
   8572   \DeclareUnicodeCharacter{0108}{\^C}
   8573   \DeclareUnicodeCharacter{0109}{\^c}
   8574   \DeclareUnicodeCharacter{0118}{\ogonek{E}}
   8575   \DeclareUnicodeCharacter{0119}{\ogonek{e}}
   8576   \DeclareUnicodeCharacter{010A}{\dotaccent{C}}
   8577   \DeclareUnicodeCharacter{010B}{\dotaccent{c}}
   8578   \DeclareUnicodeCharacter{010C}{\v{C}}
   8579   \DeclareUnicodeCharacter{010D}{\v{c}}
   8580   \DeclareUnicodeCharacter{010E}{\v{D}}
   8581 
   8582   \DeclareUnicodeCharacter{0112}{\=E}
   8583   \DeclareUnicodeCharacter{0113}{\=e}
   8584   \DeclareUnicodeCharacter{0114}{\u{E}}
   8585   \DeclareUnicodeCharacter{0115}{\u{e}}
   8586   \DeclareUnicodeCharacter{0116}{\dotaccent{E}}
   8587   \DeclareUnicodeCharacter{0117}{\dotaccent{e}}
   8588   \DeclareUnicodeCharacter{011A}{\v{E}}
   8589   \DeclareUnicodeCharacter{011B}{\v{e}}
   8590   \DeclareUnicodeCharacter{011C}{\^G}
   8591   \DeclareUnicodeCharacter{011D}{\^g}
   8592   \DeclareUnicodeCharacter{011E}{\u{G}}
   8593   \DeclareUnicodeCharacter{011F}{\u{g}}
   8594 
   8595   \DeclareUnicodeCharacter{0120}{\dotaccent{G}}
   8596   \DeclareUnicodeCharacter{0121}{\dotaccent{g}}
   8597   \DeclareUnicodeCharacter{0124}{\^H}
   8598   \DeclareUnicodeCharacter{0125}{\^h}
   8599   \DeclareUnicodeCharacter{0128}{\~I}
   8600   \DeclareUnicodeCharacter{0129}{\~{\dotless{i}}}
   8601   \DeclareUnicodeCharacter{012A}{\=I}
   8602   \DeclareUnicodeCharacter{012B}{\={\dotless{i}}}
   8603   \DeclareUnicodeCharacter{012C}{\u{I}}
   8604   \DeclareUnicodeCharacter{012D}{\u{\dotless{i}}}
   8605 
   8606   \DeclareUnicodeCharacter{0130}{\dotaccent{I}}
   8607   \DeclareUnicodeCharacter{0131}{\dotless{i}}
   8608   \DeclareUnicodeCharacter{0132}{IJ}
   8609   \DeclareUnicodeCharacter{0133}{ij}
   8610   \DeclareUnicodeCharacter{0134}{\^J}
   8611   \DeclareUnicodeCharacter{0135}{\^{\dotless{j}}}
   8612   \DeclareUnicodeCharacter{0139}{\'L}
   8613   \DeclareUnicodeCharacter{013A}{\'l}
   8614 
   8615   \DeclareUnicodeCharacter{0141}{\L}
   8616   \DeclareUnicodeCharacter{0142}{\l}
   8617   \DeclareUnicodeCharacter{0143}{\'N}
   8618   \DeclareUnicodeCharacter{0144}{\'n}
   8619   \DeclareUnicodeCharacter{0147}{\v{N}}
   8620   \DeclareUnicodeCharacter{0148}{\v{n}}
   8621   \DeclareUnicodeCharacter{014C}{\=O}
   8622   \DeclareUnicodeCharacter{014D}{\=o}
   8623   \DeclareUnicodeCharacter{014E}{\u{O}}
   8624   \DeclareUnicodeCharacter{014F}{\u{o}}
   8625 
   8626   \DeclareUnicodeCharacter{0150}{\H{O}}
   8627   \DeclareUnicodeCharacter{0151}{\H{o}}
   8628   \DeclareUnicodeCharacter{0152}{\OE}
   8629   \DeclareUnicodeCharacter{0153}{\oe}
   8630   \DeclareUnicodeCharacter{0154}{\'R}
   8631   \DeclareUnicodeCharacter{0155}{\'r}
   8632   \DeclareUnicodeCharacter{0158}{\v{R}}
   8633   \DeclareUnicodeCharacter{0159}{\v{r}}
   8634   \DeclareUnicodeCharacter{015A}{\'S}
   8635   \DeclareUnicodeCharacter{015B}{\'s}
   8636   \DeclareUnicodeCharacter{015C}{\^S}
   8637   \DeclareUnicodeCharacter{015D}{\^s}
   8638   \DeclareUnicodeCharacter{015E}{\cedilla{S}}
   8639   \DeclareUnicodeCharacter{015F}{\cedilla{s}}
   8640 
   8641   \DeclareUnicodeCharacter{0160}{\v{S}}
   8642   \DeclareUnicodeCharacter{0161}{\v{s}}
   8643   \DeclareUnicodeCharacter{0162}{\cedilla{t}}
   8644   \DeclareUnicodeCharacter{0163}{\cedilla{T}}
   8645   \DeclareUnicodeCharacter{0164}{\v{T}}
   8646 
   8647   \DeclareUnicodeCharacter{0168}{\~U}
   8648   \DeclareUnicodeCharacter{0169}{\~u}
   8649   \DeclareUnicodeCharacter{016A}{\=U}
   8650   \DeclareUnicodeCharacter{016B}{\=u}
   8651   \DeclareUnicodeCharacter{016C}{\u{U}}
   8652   \DeclareUnicodeCharacter{016D}{\u{u}}
   8653   \DeclareUnicodeCharacter{016E}{\ringaccent{U}}
   8654   \DeclareUnicodeCharacter{016F}{\ringaccent{u}}
   8655 
   8656   \DeclareUnicodeCharacter{0170}{\H{U}}
   8657   \DeclareUnicodeCharacter{0171}{\H{u}}
   8658   \DeclareUnicodeCharacter{0174}{\^W}
   8659   \DeclareUnicodeCharacter{0175}{\^w}
   8660   \DeclareUnicodeCharacter{0176}{\^Y}
   8661   \DeclareUnicodeCharacter{0177}{\^y}
   8662   \DeclareUnicodeCharacter{0178}{\"Y}
   8663   \DeclareUnicodeCharacter{0179}{\'Z}
   8664   \DeclareUnicodeCharacter{017A}{\'z}
   8665   \DeclareUnicodeCharacter{017B}{\dotaccent{Z}}
   8666   \DeclareUnicodeCharacter{017C}{\dotaccent{z}}
   8667   \DeclareUnicodeCharacter{017D}{\v{Z}}
   8668   \DeclareUnicodeCharacter{017E}{\v{z}}
   8669 
   8670   \DeclareUnicodeCharacter{01C4}{D\v{Z}}
   8671   \DeclareUnicodeCharacter{01C5}{D\v{z}}
   8672   \DeclareUnicodeCharacter{01C6}{d\v{z}}
   8673   \DeclareUnicodeCharacter{01C7}{LJ}
   8674   \DeclareUnicodeCharacter{01C8}{Lj}
   8675   \DeclareUnicodeCharacter{01C9}{lj}
   8676   \DeclareUnicodeCharacter{01CA}{NJ}
   8677   \DeclareUnicodeCharacter{01CB}{Nj}
   8678   \DeclareUnicodeCharacter{01CC}{nj}
   8679   \DeclareUnicodeCharacter{01CD}{\v{A}}
   8680   \DeclareUnicodeCharacter{01CE}{\v{a}}
   8681   \DeclareUnicodeCharacter{01CF}{\v{I}}
   8682 
   8683   \DeclareUnicodeCharacter{01D0}{\v{\dotless{i}}}
   8684   \DeclareUnicodeCharacter{01D1}{\v{O}}
   8685   \DeclareUnicodeCharacter{01D2}{\v{o}}
   8686   \DeclareUnicodeCharacter{01D3}{\v{U}}
   8687   \DeclareUnicodeCharacter{01D4}{\v{u}}
   8688 
   8689   \DeclareUnicodeCharacter{01E2}{\={\AE}}
   8690   \DeclareUnicodeCharacter{01E3}{\={\ae}}
   8691   \DeclareUnicodeCharacter{01E6}{\v{G}}
   8692   \DeclareUnicodeCharacter{01E7}{\v{g}}
   8693   \DeclareUnicodeCharacter{01E8}{\v{K}}
   8694   \DeclareUnicodeCharacter{01E9}{\v{k}}
   8695 
   8696   \DeclareUnicodeCharacter{01F0}{\v{\dotless{j}}}
   8697   \DeclareUnicodeCharacter{01F1}{DZ}
   8698   \DeclareUnicodeCharacter{01F2}{Dz}
   8699   \DeclareUnicodeCharacter{01F3}{dz}
   8700   \DeclareUnicodeCharacter{01F4}{\'G}
   8701   \DeclareUnicodeCharacter{01F5}{\'g}
   8702   \DeclareUnicodeCharacter{01F8}{\`N}
   8703   \DeclareUnicodeCharacter{01F9}{\`n}
   8704   \DeclareUnicodeCharacter{01FC}{\'{\AE}}
   8705   \DeclareUnicodeCharacter{01FD}{\'{\ae}}
   8706   \DeclareUnicodeCharacter{01FE}{\'{\O}}
   8707   \DeclareUnicodeCharacter{01FF}{\'{\o}}
   8708 
   8709   \DeclareUnicodeCharacter{021E}{\v{H}}
   8710   \DeclareUnicodeCharacter{021F}{\v{h}}
   8711 
   8712   \DeclareUnicodeCharacter{0226}{\dotaccent{A}}
   8713   \DeclareUnicodeCharacter{0227}{\dotaccent{a}}
   8714   \DeclareUnicodeCharacter{0228}{\cedilla{E}}
   8715   \DeclareUnicodeCharacter{0229}{\cedilla{e}}
   8716   \DeclareUnicodeCharacter{022E}{\dotaccent{O}}
   8717   \DeclareUnicodeCharacter{022F}{\dotaccent{o}}
   8718 
   8719   \DeclareUnicodeCharacter{0232}{\=Y}
   8720   \DeclareUnicodeCharacter{0233}{\=y}
   8721   \DeclareUnicodeCharacter{0237}{\dotless{j}}
   8722 
   8723   \DeclareUnicodeCharacter{02DB}{\ogonek{ }}
   8724 
   8725   \DeclareUnicodeCharacter{1E02}{\dotaccent{B}}
   8726   \DeclareUnicodeCharacter{1E03}{\dotaccent{b}}
   8727   \DeclareUnicodeCharacter{1E04}{\udotaccent{B}}
   8728   \DeclareUnicodeCharacter{1E05}{\udotaccent{b}}
   8729   \DeclareUnicodeCharacter{1E06}{\ubaraccent{B}}
   8730   \DeclareUnicodeCharacter{1E07}{\ubaraccent{b}}
   8731   \DeclareUnicodeCharacter{1E0A}{\dotaccent{D}}
   8732   \DeclareUnicodeCharacter{1E0B}{\dotaccent{d}}
   8733   \DeclareUnicodeCharacter{1E0C}{\udotaccent{D}}
   8734   \DeclareUnicodeCharacter{1E0D}{\udotaccent{d}}
   8735   \DeclareUnicodeCharacter{1E0E}{\ubaraccent{D}}
   8736   \DeclareUnicodeCharacter{1E0F}{\ubaraccent{d}}
   8737 
   8738   \DeclareUnicodeCharacter{1E1E}{\dotaccent{F}}
   8739   \DeclareUnicodeCharacter{1E1F}{\dotaccent{f}}
   8740 
   8741   \DeclareUnicodeCharacter{1E20}{\=G}
   8742   \DeclareUnicodeCharacter{1E21}{\=g}
   8743   \DeclareUnicodeCharacter{1E22}{\dotaccent{H}}
   8744   \DeclareUnicodeCharacter{1E23}{\dotaccent{h}}
   8745   \DeclareUnicodeCharacter{1E24}{\udotaccent{H}}
   8746   \DeclareUnicodeCharacter{1E25}{\udotaccent{h}}
   8747   \DeclareUnicodeCharacter{1E26}{\"H}
   8748   \DeclareUnicodeCharacter{1E27}{\"h}
   8749 
   8750   \DeclareUnicodeCharacter{1E30}{\'K}
   8751   \DeclareUnicodeCharacter{1E31}{\'k}
   8752   \DeclareUnicodeCharacter{1E32}{\udotaccent{K}}
   8753   \DeclareUnicodeCharacter{1E33}{\udotaccent{k}}
   8754   \DeclareUnicodeCharacter{1E34}{\ubaraccent{K}}
   8755   \DeclareUnicodeCharacter{1E35}{\ubaraccent{k}}
   8756   \DeclareUnicodeCharacter{1E36}{\udotaccent{L}}
   8757   \DeclareUnicodeCharacter{1E37}{\udotaccent{l}}
   8758   \DeclareUnicodeCharacter{1E3A}{\ubaraccent{L}}
   8759   \DeclareUnicodeCharacter{1E3B}{\ubaraccent{l}}
   8760   \DeclareUnicodeCharacter{1E3E}{\'M}
   8761   \DeclareUnicodeCharacter{1E3F}{\'m}
   8762 
   8763   \DeclareUnicodeCharacter{1E40}{\dotaccent{M}}
   8764   \DeclareUnicodeCharacter{1E41}{\dotaccent{m}}
   8765   \DeclareUnicodeCharacter{1E42}{\udotaccent{M}}
   8766   \DeclareUnicodeCharacter{1E43}{\udotaccent{m}}
   8767   \DeclareUnicodeCharacter{1E44}{\dotaccent{N}}
   8768   \DeclareUnicodeCharacter{1E45}{\dotaccent{n}}
   8769   \DeclareUnicodeCharacter{1E46}{\udotaccent{N}}
   8770   \DeclareUnicodeCharacter{1E47}{\udotaccent{n}}
   8771   \DeclareUnicodeCharacter{1E48}{\ubaraccent{N}}
   8772   \DeclareUnicodeCharacter{1E49}{\ubaraccent{n}}
   8773 
   8774   \DeclareUnicodeCharacter{1E54}{\'P}
   8775   \DeclareUnicodeCharacter{1E55}{\'p}
   8776   \DeclareUnicodeCharacter{1E56}{\dotaccent{P}}
   8777   \DeclareUnicodeCharacter{1E57}{\dotaccent{p}}
   8778   \DeclareUnicodeCharacter{1E58}{\dotaccent{R}}
   8779   \DeclareUnicodeCharacter{1E59}{\dotaccent{r}}
   8780   \DeclareUnicodeCharacter{1E5A}{\udotaccent{R}}
   8781   \DeclareUnicodeCharacter{1E5B}{\udotaccent{r}}
   8782   \DeclareUnicodeCharacter{1E5E}{\ubaraccent{R}}
   8783   \DeclareUnicodeCharacter{1E5F}{\ubaraccent{r}}
   8784 
   8785   \DeclareUnicodeCharacter{1E60}{\dotaccent{S}}
   8786   \DeclareUnicodeCharacter{1E61}{\dotaccent{s}}
   8787   \DeclareUnicodeCharacter{1E62}{\udotaccent{S}}
   8788   \DeclareUnicodeCharacter{1E63}{\udotaccent{s}}
   8789   \DeclareUnicodeCharacter{1E6A}{\dotaccent{T}}
   8790   \DeclareUnicodeCharacter{1E6B}{\dotaccent{t}}
   8791   \DeclareUnicodeCharacter{1E6C}{\udotaccent{T}}
   8792   \DeclareUnicodeCharacter{1E6D}{\udotaccent{t}}
   8793   \DeclareUnicodeCharacter{1E6E}{\ubaraccent{T}}
   8794   \DeclareUnicodeCharacter{1E6F}{\ubaraccent{t}}
   8795 
   8796   \DeclareUnicodeCharacter{1E7C}{\~V}
   8797   \DeclareUnicodeCharacter{1E7D}{\~v}
   8798   \DeclareUnicodeCharacter{1E7E}{\udotaccent{V}}
   8799   \DeclareUnicodeCharacter{1E7F}{\udotaccent{v}}
   8800 
   8801   \DeclareUnicodeCharacter{1E80}{\`W}
   8802   \DeclareUnicodeCharacter{1E81}{\`w}
   8803   \DeclareUnicodeCharacter{1E82}{\'W}
   8804   \DeclareUnicodeCharacter{1E83}{\'w}
   8805   \DeclareUnicodeCharacter{1E84}{\"W}
   8806   \DeclareUnicodeCharacter{1E85}{\"w}
   8807   \DeclareUnicodeCharacter{1E86}{\dotaccent{W}}
   8808   \DeclareUnicodeCharacter{1E87}{\dotaccent{w}}
   8809   \DeclareUnicodeCharacter{1E88}{\udotaccent{W}}
   8810   \DeclareUnicodeCharacter{1E89}{\udotaccent{w}}
   8811   \DeclareUnicodeCharacter{1E8A}{\dotaccent{X}}
   8812   \DeclareUnicodeCharacter{1E8B}{\dotaccent{x}}
   8813   \DeclareUnicodeCharacter{1E8C}{\"X}
   8814   \DeclareUnicodeCharacter{1E8D}{\"x}
   8815   \DeclareUnicodeCharacter{1E8E}{\dotaccent{Y}}
   8816   \DeclareUnicodeCharacter{1E8F}{\dotaccent{y}}
   8817 
   8818   \DeclareUnicodeCharacter{1E90}{\^Z}
   8819   \DeclareUnicodeCharacter{1E91}{\^z}
   8820   \DeclareUnicodeCharacter{1E92}{\udotaccent{Z}}
   8821   \DeclareUnicodeCharacter{1E93}{\udotaccent{z}}
   8822   \DeclareUnicodeCharacter{1E94}{\ubaraccent{Z}}
   8823   \DeclareUnicodeCharacter{1E95}{\ubaraccent{z}}
   8824   \DeclareUnicodeCharacter{1E96}{\ubaraccent{h}}
   8825   \DeclareUnicodeCharacter{1E97}{\"t}
   8826   \DeclareUnicodeCharacter{1E98}{\ringaccent{w}}
   8827   \DeclareUnicodeCharacter{1E99}{\ringaccent{y}}
   8828 
   8829   \DeclareUnicodeCharacter{1EA0}{\udotaccent{A}}
   8830   \DeclareUnicodeCharacter{1EA1}{\udotaccent{a}}
   8831 
   8832   \DeclareUnicodeCharacter{1EB8}{\udotaccent{E}}
   8833   \DeclareUnicodeCharacter{1EB9}{\udotaccent{e}}
   8834   \DeclareUnicodeCharacter{1EBC}{\~E}
   8835   \DeclareUnicodeCharacter{1EBD}{\~e}
   8836 
   8837   \DeclareUnicodeCharacter{1ECA}{\udotaccent{I}}
   8838   \DeclareUnicodeCharacter{1ECB}{\udotaccent{i}}
   8839   \DeclareUnicodeCharacter{1ECC}{\udotaccent{O}}
   8840   \DeclareUnicodeCharacter{1ECD}{\udotaccent{o}}
   8841 
   8842   \DeclareUnicodeCharacter{1EE4}{\udotaccent{U}}
   8843   \DeclareUnicodeCharacter{1EE5}{\udotaccent{u}}
   8844 
   8845   \DeclareUnicodeCharacter{1EF2}{\`Y}
   8846   \DeclareUnicodeCharacter{1EF3}{\`y}
   8847   \DeclareUnicodeCharacter{1EF4}{\udotaccent{Y}}
   8848 
   8849   \DeclareUnicodeCharacter{1EF8}{\~Y}
   8850   \DeclareUnicodeCharacter{1EF9}{\~y}
   8851 
   8852   \DeclareUnicodeCharacter{2013}{--}
   8853   \DeclareUnicodeCharacter{2014}{---}
   8854   \DeclareUnicodeCharacter{2018}{\quoteleft}
   8855   \DeclareUnicodeCharacter{2019}{\quoteright}
   8856   \DeclareUnicodeCharacter{201A}{\quotesinglbase}
   8857   \DeclareUnicodeCharacter{201C}{\quotedblleft}
   8858   \DeclareUnicodeCharacter{201D}{\quotedblright}
   8859   \DeclareUnicodeCharacter{201E}{\quotedblbase}
   8860   \DeclareUnicodeCharacter{2022}{\bullet}
   8861   \DeclareUnicodeCharacter{2026}{\dots}
   8862   \DeclareUnicodeCharacter{2039}{\guilsinglleft}
   8863   \DeclareUnicodeCharacter{203A}{\guilsinglright}
   8864   \DeclareUnicodeCharacter{20AC}{\euro}
   8865 
   8866   \DeclareUnicodeCharacter{2192}{\expansion}
   8867   \DeclareUnicodeCharacter{21D2}{\result}
   8868 
   8869   \DeclareUnicodeCharacter{2212}{\minus}
   8870   \DeclareUnicodeCharacter{2217}{\point}
   8871   \DeclareUnicodeCharacter{2261}{\equiv}
   8872 }% end of \utfeightchardefs
   8873 
   8874 
   8875 % US-ASCII character definitions.
   8876 \def\asciichardefs{% nothing need be done
   8877    \relax
   8878 }
   8879 
   8880 % Make non-ASCII characters printable again for compatibility with
   8881 % existing Texinfo documents that may use them, even without declaring a
   8882 % document encoding.
   8883 %
   8884 \setnonasciicharscatcode \other
   8885 
   8886 
   8887 \message{formatting,}
   8888 
   8889 \newdimen\defaultparindent \defaultparindent = 15pt
   8890 
   8891 \chapheadingskip = 15pt plus 4pt minus 2pt
   8892 \secheadingskip = 12pt plus 3pt minus 2pt
   8893 \subsecheadingskip = 9pt plus 2pt minus 2pt
   8894 
   8895 % Prevent underfull vbox error messages.
   8896 \vbadness = 10000
   8897 
   8898 % Don't be so finicky about underfull hboxes, either.
   8899 \hbadness = 2000
   8900 
   8901 % Following George Bush, get rid of widows and orphans.
   8902 \widowpenalty=10000
   8903 \clubpenalty=10000
   8904 
   8905 % Use TeX 3.0's \emergencystretch to help line breaking, but if we're
   8906 % using an old version of TeX, don't do anything.  We want the amount of
   8907 % stretch added to depend on the line length, hence the dependence on
   8908 % \hsize.  We call this whenever the paper size is set.
   8909 %
   8910 \def\setemergencystretch{%
   8911   \ifx\emergencystretch\thisisundefined
   8912     % Allow us to assign to \emergencystretch anyway.
   8913     \def\emergencystretch{\dimen0}%
   8914   \else
   8915     \emergencystretch = .15\hsize
   8916   \fi
   8917 }
   8918 
   8919 % Parameters in order: 1) textheight; 2) textwidth;
   8920 % 3) voffset; 4) hoffset; 5) binding offset; 6) topskip;
   8921 % 7) physical page height; 8) physical page width.
   8922 %
   8923 % We also call \setleading{\textleading}, so the caller should define
   8924 % \textleading.  The caller should also set \parskip.
   8925 %
   8926 \def\internalpagesizes#1#2#3#4#5#6#7#8{%
   8927   \voffset = #3\relax
   8928   \topskip = #6\relax
   8929   \splittopskip = \topskip
   8930   %
   8931   \vsize = #1\relax
   8932   \advance\vsize by \topskip
   8933   \outervsize = \vsize
   8934   \advance\outervsize by 2\topandbottommargin
   8935   \pageheight = \vsize
   8936   %
   8937   \hsize = #2\relax
   8938   \outerhsize = \hsize
   8939   \advance\outerhsize by 0.5in
   8940   \pagewidth = \hsize
   8941   %
   8942   \normaloffset = #4\relax
   8943   \bindingoffset = #5\relax
   8944   %
   8945   \ifpdf
   8946     \pdfpageheight #7\relax
   8947     \pdfpagewidth #8\relax
   8948     % if we don't reset these, they will remain at "1 true in" of
   8949     % whatever layout pdftex was dumped with.
   8950     \pdfhorigin = 1 true in
   8951     \pdfvorigin = 1 true in
   8952   \fi
   8953   %
   8954   \setleading{\textleading}
   8955   %
   8956   \parindent = \defaultparindent
   8957   \setemergencystretch
   8958 }
   8959 
   8960 % @letterpaper (the default).
   8961 \def\letterpaper{{\globaldefs = 1
   8962   \parskip = 3pt plus 2pt minus 1pt
   8963   \textleading = 13.2pt
   8964   %
   8965   % If page is nothing but text, make it come out even.
   8966   \internalpagesizes{607.2pt}{6in}% that's 46 lines
   8967                     {\voffset}{.25in}%
   8968                     {\bindingoffset}{36pt}%
   8969                     {11in}{8.5in}%
   8970 }}
   8971 
   8972 % Use @smallbook to reset parameters for 7x9.25 trim size.
   8973 \def\smallbook{{\globaldefs = 1
   8974   \parskip = 2pt plus 1pt
   8975   \textleading = 12pt
   8976   %
   8977   \internalpagesizes{7.5in}{5in}%
   8978                     {-.2in}{0in}%
   8979                     {\bindingoffset}{16pt}%
   8980                     {9.25in}{7in}%
   8981   %
   8982   \lispnarrowing = 0.3in
   8983   \tolerance = 700
   8984   \hfuzz = 1pt
   8985   \contentsrightmargin = 0pt
   8986   \defbodyindent = .5cm
   8987 }}
   8988 
   8989 % Use @smallerbook to reset parameters for 6x9 trim size.
   8990 % (Just testing, parameters still in flux.)
   8991 \def\smallerbook{{\globaldefs = 1
   8992   \parskip = 1.5pt plus 1pt
   8993   \textleading = 12pt
   8994   %
   8995   \internalpagesizes{7.4in}{4.8in}%
   8996                     {-.2in}{-.4in}%
   8997                     {0pt}{14pt}%
   8998                     {9in}{6in}%
   8999   %
   9000   \lispnarrowing = 0.25in
   9001   \tolerance = 700
   9002   \hfuzz = 1pt
   9003   \contentsrightmargin = 0pt
   9004   \defbodyindent = .4cm
   9005 }}
   9006 
   9007 % Use @afourpaper to print on European A4 paper.
   9008 \def\afourpaper{{\globaldefs = 1
   9009   \parskip = 3pt plus 2pt minus 1pt
   9010   \textleading = 13.2pt
   9011   %
   9012   % Double-side printing via postscript on Laserjet 4050
   9013   % prints double-sided nicely when \bindingoffset=10mm and \hoffset=-6mm.
   9014   % To change the settings for a different printer or situation, adjust
   9015   % \normaloffset until the front-side and back-side texts align.  Then
   9016   % do the same for \bindingoffset.  You can set these for testing in
   9017   % your texinfo source file like this:
   9018   % @tex
   9019   % \global\normaloffset = -6mm
   9020   % \global\bindingoffset = 10mm
   9021   % @end tex
   9022   \internalpagesizes{673.2pt}{160mm}% that's 51 lines
   9023                     {\voffset}{\hoffset}%
   9024                     {\bindingoffset}{44pt}%
   9025                     {297mm}{210mm}%
   9026   %
   9027   \tolerance = 700
   9028   \hfuzz = 1pt
   9029   \contentsrightmargin = 0pt
   9030   \defbodyindent = 5mm
   9031 }}
   9032 
   9033 % Use @afivepaper to print on European A5 paper.
   9034 % From romildo (a] urano.iceb.ufop.br, 2 July 2000.
   9035 % He also recommends making @example and @lisp be small.
   9036 \def\afivepaper{{\globaldefs = 1
   9037   \parskip = 2pt plus 1pt minus 0.1pt
   9038   \textleading = 12.5pt
   9039   %
   9040   \internalpagesizes{160mm}{120mm}%
   9041                     {\voffset}{\hoffset}%
   9042                     {\bindingoffset}{8pt}%
   9043                     {210mm}{148mm}%
   9044   %
   9045   \lispnarrowing = 0.2in
   9046   \tolerance = 800
   9047   \hfuzz = 1.2pt
   9048   \contentsrightmargin = 0pt
   9049   \defbodyindent = 2mm
   9050   \tableindent = 12mm
   9051 }}
   9052 
   9053 % A specific text layout, 24x15cm overall, intended for A4 paper.
   9054 \def\afourlatex{{\globaldefs = 1
   9055   \afourpaper
   9056   \internalpagesizes{237mm}{150mm}%
   9057                     {\voffset}{4.6mm}%
   9058                     {\bindingoffset}{7mm}%
   9059                     {297mm}{210mm}%
   9060   %
   9061   % Must explicitly reset to 0 because we call \afourpaper.
   9062   \globaldefs = 0
   9063 }}
   9064 
   9065 % Use @afourwide to print on A4 paper in landscape format.
   9066 \def\afourwide{{\globaldefs = 1
   9067   \afourpaper
   9068   \internalpagesizes{241mm}{165mm}%
   9069                     {\voffset}{-2.95mm}%
   9070                     {\bindingoffset}{7mm}%
   9071                     {297mm}{210mm}%
   9072   \globaldefs = 0
   9073 }}
   9074 
   9075 % @pagesizes TEXTHEIGHT[,TEXTWIDTH]
   9076 % Perhaps we should allow setting the margins, \topskip, \parskip,
   9077 % and/or leading, also. Or perhaps we should compute them somehow.
   9078 %
   9079 \parseargdef\pagesizes{\pagesizesyyy #1,,\finish}
   9080 \def\pagesizesyyy#1,#2,#3\finish{{%
   9081   \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \hsize=#2\relax \fi
   9082   \globaldefs = 1
   9083   %
   9084   \parskip = 3pt plus 2pt minus 1pt
   9085   \setleading{\textleading}%
   9086   %
   9087   \dimen0 = #1\relax
   9088   \advance\dimen0 by \voffset
   9089   %
   9090   \dimen2 = \hsize
   9091   \advance\dimen2 by \normaloffset
   9092   %
   9093   \internalpagesizes{#1}{\hsize}%
   9094                     {\voffset}{\normaloffset}%
   9095                     {\bindingoffset}{44pt}%
   9096                     {\dimen0}{\dimen2}%
   9097 }}
   9098 
   9099 % Set default to letter.
   9100 %
   9101 \letterpaper
   9102 
   9103 
   9104 \message{and turning on texinfo input format.}
   9105 
   9106 % DEL is a comment character, in case @c does not suffice.
   9107 \catcode`\^^? = 14
   9108 
   9109 % Define macros to output various characters with catcode for normal text.
   9110 \catcode`\"=\other
   9111 \catcode`\~=\other
   9112 \catcode`\^=\other
   9113 \catcode`\_=\other
   9114 \catcode`\|=\other
   9115 \catcode`\<=\other
   9116 \catcode`\>=\other
   9117 \catcode`\+=\other
   9118 \catcode`\$=\other
   9119 \def\normaldoublequote{"}
   9120 \def\normaltilde{~}
   9121 \def\normalcaret{^}
   9122 \def\normalunderscore{_}
   9123 \def\normalverticalbar{|}
   9124 \def\normalless{<}
   9125 \def\normalgreater{>}
   9126 \def\normalplus{+}
   9127 \def\normaldollar{$}%$ font-lock fix
   9128 
   9129 % This macro is used to make a character print one way in \tt
   9130 % (where it can probably be output as-is), and another way in other fonts,
   9131 % where something hairier probably needs to be done.
   9132 %
   9133 % #1 is what to print if we are indeed using \tt; #2 is what to print
   9134 % otherwise.  Since all the Computer Modern typewriter fonts have zero
   9135 % interword stretch (and shrink), and it is reasonable to expect all
   9136 % typewriter fonts to have this, we can check that font parameter.
   9137 %
   9138 \def\ifusingtt#1#2{\ifdim \fontdimen3\font=0pt #1\else #2\fi}
   9139 
   9140 % Same as above, but check for italic font.  Actually this also catches
   9141 % non-italic slanted fonts since it is impossible to distinguish them from
   9142 % italic fonts.  But since this is only used by $ and it uses \sl anyway
   9143 % this is not a problem.
   9144 \def\ifusingit#1#2{\ifdim \fontdimen1\font>0pt #1\else #2\fi}
   9145 
   9146 % Turn off all special characters except @
   9147 % (and those which the user can use as if they were ordinary).
   9148 % Most of these we simply print from the \tt font, but for some, we can
   9149 % use math or other variants that look better in normal text.
   9150 
   9151 \catcode`\"=\active
   9152 \def\activedoublequote{{\tt\char34}}
   9153 \let"=\activedoublequote
   9154 \catcode`\~=\active
   9155 \def~{{\tt\char126}}
   9156 \chardef\hat=`\^
   9157 \catcode`\^=\active
   9158 \def^{{\tt \hat}}
   9159 
   9160 \catcode`\_=\active
   9161 \def_{\ifusingtt\normalunderscore\_}
   9162 \let\realunder=_
   9163 % Subroutine for the previous macro.
   9164 \def\_{\leavevmode \kern.07em \vbox{\hrule width.3em height.1ex}\kern .07em }
   9165 
   9166 \catcode`\|=\active
   9167 \def|{{\tt\char124}}
   9168 \chardef \less=`\<
   9169 \catcode`\<=\active
   9170 \def<{{\tt \less}}
   9171 \chardef \gtr=`\>
   9172 \catcode`\>=\active
   9173 \def>{{\tt \gtr}}
   9174 \catcode`\+=\active
   9175 \def+{{\tt \char 43}}
   9176 \catcode`\$=\active
   9177 \def${\ifusingit{{\sl\$}}\normaldollar}%$ font-lock fix
   9178 
   9179 % If a .fmt file is being used, characters that might appear in a file
   9180 % name cannot be active until we have parsed the command line.
   9181 % So turn them off again, and have \everyjob (or @setfilename) turn them on.
   9182 % \otherifyactive is called near the end of this file.
   9183 \def\otherifyactive{\catcode`+=\other \catcode`\_=\other}
   9184 
   9185 % Used sometimes to turn off (effectively) the active characters even after
   9186 % parsing them.
   9187 \def\turnoffactive{%
   9188   \normalturnoffactive
   9189   \otherbackslash
   9190 }
   9191 
   9192 \catcode`\@=0
   9193 
   9194 % \backslashcurfont outputs one backslash character in current font,
   9195 % as in \char`\\.
   9196 \global\chardef\backslashcurfont=`\\
   9197 \global\let\rawbackslashxx=\backslashcurfont  % let existing .??s files work
   9198 
   9199 % \realbackslash is an actual character `\' with catcode other, and
   9200 % \doublebackslash is two of them (for the pdf outlines).
   9201 {\catcode`\\=\other @gdef@realbackslash{\} @gdef@doublebackslash{\\}}
   9202 
   9203 % In texinfo, backslash is an active character; it prints the backslash
   9204 % in fixed width font.
   9205 \catcode`\\=\active
   9206 @def@normalbackslash{{@tt@backslashcurfont}}
   9207 % On startup, @fixbackslash assigns:
   9208 %  @let \ = @normalbackslash
   9209 
   9210 % \rawbackslash defines an active \ to do \backslashcurfont.
   9211 % \otherbackslash defines an active \ to be a literal `\' character with
   9212 % catcode other.
   9213 @gdef@rawbackslash{@let\=@backslashcurfont}
   9214 @gdef@otherbackslash{@let\=@realbackslash}
   9215 
   9216 % Same as @turnoffactive except outputs \ as {\tt\char`\\} instead of
   9217 % the literal character `\'.
   9218 %
   9219 @def@normalturnoffactive{%
   9220   @let\=@normalbackslash
   9221   @let"=@normaldoublequote
   9222   @let~=@normaltilde
   9223   @let^=@normalcaret
   9224   @let_=@normalunderscore
   9225   @let|=@normalverticalbar
   9226   @let<=@normalless
   9227   @let>=@normalgreater
   9228   @let+=@normalplus
   9229   @let$=@normaldollar %$ font-lock fix
   9230   @markupsetuplqdefault
   9231   @markupsetuprqdefault
   9232   @unsepspaces
   9233 }
   9234 
   9235 % Make _ and + \other characters, temporarily.
   9236 % This is canceled by @fixbackslash.
   9237 @otherifyactive
   9238 
   9239 % If a .fmt file is being used, we don't want the `\input texinfo' to show up.
   9240 % That is what \eatinput is for; after that, the `\' should revert to printing
   9241 % a backslash.
   9242 %
   9243 @gdef@eatinput input texinfo{@fixbackslash}
   9244 @global@let\ = @eatinput
   9245 
   9246 % On the other hand, perhaps the file did not have a `\input texinfo'. Then
   9247 % the first `\' in the file would cause an error. This macro tries to fix
   9248 % that, assuming it is called before the first `\' could plausibly occur.
   9249 % Also turn back on active characters that might appear in the input
   9250 % file name, in case not using a pre-dumped format.
   9251 %
   9252 @gdef@fixbackslash{%
   9253   @ifx\@eatinput @let\ = @normalbackslash @fi
   9254   @catcode`+=@active
   9255   @catcode`@_=@active
   9256 }
   9257 
   9258 % Say @foo, not \foo, in error messages.
   9259 @escapechar = `@@
   9260 
   9261 % These look ok in all fonts, so just make them not special.
   9262 @catcode`@& = @other
   9263 @catcode`@# = @other
   9264 @catcode`@% = @other
   9265 
   9266 @c Finally, make ` and ' active, so that txicodequoteundirected and
   9267 @c txicodequotebacktick work right in, e.g., @w{@code{`foo'}}.  If we
   9268 @c don't make ` and ' active, @code will not get them as active chars.
   9269 @c Do this last of all since we use ` in the previous @catcode assignments.
   9270 @catcode`@'=@active
   9271 @catcode`@`=@active
   9272 @markupsetuplqdefault
   9273 @markupsetuprqdefault
   9274 
   9275 @c Gnulib now utterly and painfully insists on no trailing whitespace.
   9276 @c So we have to nuke it.
   9277 
   9278 @c Local variables:
   9279 @c eval: (add-hook 'write-file-hooks 'time-stamp)
   9280 @c eval: (add-hook 'write-file-hooks 'nuke-trailing-whitespace)
   9281 @c page-delimiter: "^\\\\message"
   9282 @c time-stamp-start: "def\\\\texinfoversion{"
   9283 @c time-stamp-format: "%:y-%02m-%02d.%02H"
   9284 @c time-stamp-end: "}"
   9285 @c End:
   9286 
   9287 @c vim:sw=2:
   9288 
   9289 @ignore
   9290    arch-tag: e1b36e32-c96e-4135-a41a-0b2efa2ea115
   9291 @end ignore
   9292