File:  [gforth] / gforth / doc / Attic / texinfo.tex
Revision 1.1: download - view: text, annotated - select for diffs
Wed May 21 20:40:05 1997 UTC (25 years ago) by anton
Branches: MAIN
CVS tags: HEAD
jwilke's changes:
Moved many files to other directories
renamed many files
other changes unknown to me.

    1: %% TeX macros to handle texinfo files
    2: 
    3: %  Copyright (C) 1985, 86, 88, 90, 91, 92, 93,
    4: %                94, 95, 1996 Free Software Foundation, Inc.
    5: 
    6: %This texinfo.tex file is free software; you can redistribute it and/or
    7: %modify it under the terms of the GNU General Public License as
    8: %published by the Free Software Foundation; either version 2, or (at
    9: %your option) any later version.
   10: 
   11: %This texinfo.tex file is distributed in the hope that it will be
   12: %useful, but WITHOUT ANY WARRANTY; without even the implied warranty
   13: %of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   14: %General Public License for more details.
   15: 
   16: %You should have received a copy of the GNU General Public License
   17: %along with this texinfo.tex file; see the file COPYING.  If not, write
   18: %to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   19: %Boston, MA 02111-1307, USA.
   20: 
   21: 
   22: %In other words, you are welcome to use, share and improve this program.
   23: %You are forbidden to forbid anyone else to use, share and improve
   24: %what you give them.   Help stamp out software-hoarding!
   25: 
   26: 
   27: % Send bug reports to bug-texinfo@prep.ai.mit.edu.
   28: % Please include a *precise* test case in each bug report.
   29: 
   30: 
   31: % Make it possible to create a .fmt file just by loading this file:
   32: % if the underlying format is not loaded, start by loading it now.
   33: % Added by gildea November 1993.
   34: \expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
   35: 
   36: % This automatically updates the version number based on RCS.
   37: \def\deftexinfoversion$#1: #2 ${\def\texinfoversion{#2}}
   38: \deftexinfoversion$Revision: 1.1 $
   39: \message{Loading texinfo package [Version \texinfoversion]:}
   40: 
   41: % If in a .fmt file, print the version number
   42: % and turn on active characters that we couldn't do earlier because
   43: % they might have appeared in the input file name.
   44: \everyjob{\message{[Texinfo version \texinfoversion]}\message{}
   45:   \catcode`+=\active \catcode`\_=\active}
   46: 
   47: % Save some parts of plain tex whose names we will redefine.
   48: 
   49: \let\ptexb=\b
   50: \let\ptexbullet=\bullet
   51: \let\ptexc=\c
   52: \let\ptexcomma=\,
   53: \let\ptexdot=\.
   54: \let\ptexdots=\dots
   55: \let\ptexend=\end
   56: \let\ptexequiv = \equiv
   57: \let\ptexi=\i
   58: \let\ptexlbrace=\{
   59: \let\ptexrbrace=\}
   60: \let\ptexstar=\*
   61: \let\ptext=\t
   62: \let\ptextilde=\~
   63: 
   64: % Be sure we're in horizontal mode when doing a tie, since we make space
   65: % equivalent to this in @example-like environments. Otherwise, a space
   66: % at the beginning of a line will start with \penalty -- and
   67: % since \penalty is valid in vertical mode, we'd end up putting the
   68: % penalty on the vertical list instead of in the new paragraph.
   69: {\catcode`@ = 11
   70:  % Avoid using \@M directly, because that causes trouble
   71:  % if the definition is written into an index file.
   72:  \global\let\tiepenalty = \@M
   73:  \gdef\tie{\leavevmode\penalty\tiepenalty\ }
   74: }
   75: \let\~ = \tie                  % And make it available as @~.
   76: 
   77: 
   78: \message{Basics,}
   79: \chardef\other=12
   80: 
   81: % If this character appears in an error message or help string, it
   82: % starts a new line in the output.
   83: \newlinechar = `^^J
   84: 
   85: % Set up fixed words for English.
   86: \ifx\putwordChapter\undefined{\gdef\putwordChapter{Chapter}}\fi%
   87: \def\putwordInfo{Info}%
   88: \ifx\putwordSee\undefined{\gdef\putwordSee{See}}\fi%
   89: \ifx\putwordsee\undefined{\gdef\putwordsee{see}}\fi%
   90: \ifx\putwordfile\undefined{\gdef\putwordfile{file}}\fi%
   91: \ifx\putwordpage\undefined{\gdef\putwordpage{page}}\fi%
   92: \ifx\putwordsection\undefined{\gdef\putwordsection{section}}\fi%
   93: \ifx\putwordSection\undefined{\gdef\putwordSection{Section}}\fi%
   94: \ifx\putwordTableofContents\undefined{\gdef\putwordTableofContents{Table of Contents}}\fi%
   95: \ifx\putwordShortContents\undefined{\gdef\putwordShortContents{Short Contents}}\fi%
   96: \ifx\putwordAppendix\undefined{\gdef\putwordAppendix{Appendix}}\fi%
   97: 
   98: % Ignore a token.
   99: %
  100: \def\gobble#1{}
  101: 
  102: \hyphenation{ap-pen-dix}
  103: \hyphenation{mini-buf-fer mini-buf-fers}
  104: \hyphenation{eshell}
  105: 
  106: % Margin to add to right of even pages, to left of odd pages.
  107: \newdimen \bindingoffset  
  108: \newdimen \normaloffset   
  109: \newdimen\pagewidth \newdimen\pageheight
  110: 
  111: % Sometimes it is convenient to have everything in the transcript file
  112: % and nothing on the terminal.  We don't just call \tracingall here,
  113: % since that produces some useless output on the terminal.
  114: %
  115: \def\gloggingall{\begingroup \globaldefs = 1 \loggingall \endgroup}%
  116: \def\loggingall{\tracingcommands2 \tracingstats2
  117:    \tracingpages1 \tracingoutput1 \tracinglostchars1
  118:    \tracingmacros2 \tracingparagraphs1 \tracingrestores1
  119:    \showboxbreadth\maxdimen\showboxdepth\maxdimen
  120: }%
  121: 
  122: %---------------------Begin change-----------------------
  123: %
  124: %%%% For @cropmarks command.
  125: % Dimensions to add cropmarks at corners Added by P. A. MacKay, 12 Nov. 1986
  126: %
  127: \newdimen\cornerlong \newdimen\cornerthick
  128: \newdimen \topandbottommargin
  129: \newdimen \outerhsize \newdimen \outervsize
  130: \cornerlong=1pc\cornerthick=.3pt        % These set size of cropmarks
  131: \outerhsize=7in
  132: %\outervsize=9.5in
  133: % Alternative @smallbook page size is 9.25in
  134: \outervsize=9.25in
  135: \topandbottommargin=.75in
  136: %
  137: %---------------------End change-----------------------
  138: 
  139: % \onepageout takes a vbox as an argument.  Note that \pagecontents
  140: % does insertions, but you have to call it yourself.
  141: \chardef\PAGE=255  \output={\onepageout{\pagecontents\PAGE}}
  142: \def\onepageout#1{%
  143:   \hoffset=\normaloffset
  144:   \ifodd\pageno  \advance\hoffset by \bindingoffset
  145:   \else \advance\hoffset by -\bindingoffset\fi
  146:   {%
  147:     \escapechar = `\\ % use backslash in output files.
  148:     \indexdummies
  149:     \shipout\vbox{%
  150:       {\let\hsize=\pagewidth \makeheadline}%
  151:       \pagebody{#1}%
  152:       {\let\hsize=\pagewidth \makefootline}%
  153:     }%
  154:   }%
  155:   \advancepageno
  156:   \ifnum\outputpenalty>-20000 \else\dosupereject\fi
  157: }
  158: 
  159: %%%% For @cropmarks command %%%%
  160: 
  161: % Here is a modification of the main output routine for Near East Publications
  162: % This provides right-angle cropmarks at all four corners.
  163: % The contents of the page are centerlined into the cropmarks,
  164: % and any desired binding offset is added as an \hskip on either
  165: % site of the centerlined box.  (P. A. MacKay, 12 November, 1986)
  166: %
  167: \def\croppageout#1{\hoffset=0pt % make sure this doesn't mess things up
  168: {\escapechar=`\\\relax % makes sure backslash is used in output files.
  169:                  \shipout
  170:                  \vbox to \outervsize{\hsize=\outerhsize
  171:                  \vbox{\line{\ewtop\hfill\ewtop}}
  172:                  \nointerlineskip
  173:                  \line{\vbox{\moveleft\cornerthick\nstop}
  174:                        \hfill
  175:                        \vbox{\moveright\cornerthick\nstop}}
  176:                  \vskip \topandbottommargin
  177:                  \centerline{\ifodd\pageno\hskip\bindingoffset\fi
  178:                         \vbox{
  179:                         {\let\hsize=\pagewidth \makeheadline}
  180:                         \pagebody{#1}
  181:                         {\let\hsize=\pagewidth \makefootline}}
  182:                         \ifodd\pageno\else\hskip\bindingoffset\fi}
  183:                  \vskip \topandbottommargin plus1fill minus1fill
  184:                  \boxmaxdepth\cornerthick
  185:                  \line{\vbox{\moveleft\cornerthick\nsbot}
  186:                        \hfill
  187:                        \vbox{\moveright\cornerthick\nsbot}}
  188:                  \nointerlineskip
  189:                  \vbox{\line{\ewbot\hfill\ewbot}}
  190:         }}
  191:   \advancepageno
  192:   \ifnum\outputpenalty>-20000 \else\dosupereject\fi}
  193: %
  194: % Do @cropmarks to get crop marks
  195: \def\cropmarks{\let\onepageout=\croppageout }
  196: 
  197: \newinsert\margin \dimen\margin=\maxdimen
  198: 
  199: \def\pagebody#1{\vbox to\pageheight{\boxmaxdepth=\maxdepth #1}}
  200: {\catcode`\@ =11
  201: \gdef\pagecontents#1{\ifvoid\topins\else\unvbox\topins\fi
  202: % marginal hacks, juha@viisa.uucp (Juha Takala)
  203: \ifvoid\margin\else % marginal info is present
  204:   \rlap{\kern\hsize\vbox to\z@{\kern1pt\box\margin \vss}}\fi
  205: \dimen@=\dp#1 \unvbox#1
  206: \ifvoid\footins\else\vskip\skip\footins\footnoterule \unvbox\footins\fi
  207: \ifr@ggedbottom \kern-\dimen@ \vfil \fi}
  208: }
  209: 
  210: %
  211: % Here are the rules for the cropmarks.  Note that they are
  212: % offset so that the space between them is truly \outerhsize or \outervsize
  213: % (P. A. MacKay, 12 November, 1986)
  214: %
  215: \def\ewtop{\vrule height\cornerthick depth0pt width\cornerlong}
  216: \def\nstop{\vbox
  217:   {\hrule height\cornerthick depth\cornerlong width\cornerthick}}
  218: \def\ewbot{\vrule height0pt depth\cornerthick width\cornerlong}
  219: \def\nsbot{\vbox
  220:   {\hrule height\cornerlong depth\cornerthick width\cornerthick}}
  221: 
  222: % Parse an argument, then pass it to #1.  The argument is the rest of
  223: % the input line (except we remove a trailing comment).  #1 should be a
  224: % macro which expects an ordinary undelimited TeX argument.
  225: %
  226: \def\parsearg#1{%
  227:   \let\next = #1%
  228:   \begingroup
  229:     \obeylines
  230:     \futurelet\temp\parseargx
  231: }
  232: 
  233: % If the next token is an obeyed space (from an @example environment or
  234: % the like), remove it and recurse.  Otherwise, we're done.
  235: \def\parseargx{%
  236:   % \obeyedspace is defined far below, after the definition of \sepspaces.
  237:   \ifx\obeyedspace\temp
  238:     \expandafter\parseargdiscardspace
  239:   \else
  240:     \expandafter\parseargline
  241:   \fi
  242: }
  243: 
  244: % Remove a single space (as the delimiter token to the macro call).
  245: {\obeyspaces %
  246:  \gdef\parseargdiscardspace {\futurelet\temp\parseargx}}
  247: 
  248: {\obeylines %
  249:   \gdef\parseargline#1^^M{%
  250:     \endgroup % End of the group started in \parsearg.
  251:     %
  252:     % First remove any @c comment, then any @comment.
  253:     % Result of each macro is put in \toks0.
  254:     \argremovec #1\c\relax %
  255:     \expandafter\argremovecomment \the\toks0 \comment\relax %
  256:     %
  257:     % Call the caller's macro, saved as \next in \parsearg.
  258:     \expandafter\next\expandafter{\the\toks0}%
  259:   }%
  260: }
  261: 
  262: % Since all \c{,omment} does is throw away the argument, we can let TeX
  263: % do that for us.  The \relax here is matched by the \relax in the call
  264: % in \parseargline; it could be more or less anything, its purpose is
  265: % just to delimit the argument to the \c.
  266: \def\argremovec#1\c#2\relax{\toks0 = {#1}}
  267: \def\argremovecomment#1\comment#2\relax{\toks0 = {#1}}
  268: 
  269: % \argremovec{,omment} might leave us with trailing spaces, though; e.g.,
  270: %    @end itemize  @c foo
  271: % will have two active spaces as part of the argument with the
  272: % `itemize'.  Here we remove all active spaces from #1, and assign the
  273: % result to \toks0.
  274: %
  275: % This loses if there are any *other* active characters besides spaces
  276: % in the argument -- _ ^ +, for example -- since they get expanded.
  277: % Fortunately, Texinfo does not define any such commands.  (If it ever
  278: % does, the catcode of the characters in questionwill have to be changed
  279: % here.)  But this means we cannot call \removeactivespaces as part of
  280: % \argremovec{,omment}, since @c uses \parsearg, and thus the argument
  281: % that \parsearg gets might well have any character at all in it.
  282: %
  283: \def\removeactivespaces#1{%
  284:   \begingroup
  285:     \ignoreactivespaces
  286:     \edef\temp{#1}%
  287:     \global\toks0 = \expandafter{\temp}%
  288:   \endgroup
  289: }
  290: 
  291: % Change the active space to expand to nothing.
  292: %
  293: \begingroup
  294:   \obeyspaces
  295:   \gdef\ignoreactivespaces{\obeyspaces\let =\empty}
  296: \endgroup
  297: 
  298: 
  299: \def\flushcr{\ifx\par\lisppar \def\next##1{}\else \let\next=\relax \fi \next}
  300: 
  301: %% These are used to keep @begin/@end levels from running away
  302: %% Call \inENV within environments (after a \begingroup)
  303: \newif\ifENV \ENVfalse \def\inENV{\ifENV\relax\else\ENVtrue\fi}
  304: \def\ENVcheck{%
  305: \ifENV\errmessage{Still within an environment.  Type Return to continue.}
  306: \endgroup\fi} % This is not perfect, but it should reduce lossage
  307: 
  308: % @begin foo  is the same as @foo, for now.
  309: \newhelp\EMsimple{Type <Return> to continue.}
  310: 
  311: \outer\def\begin{\parsearg\beginxxx}
  312: 
  313: \def\beginxxx #1{%
  314: \expandafter\ifx\csname #1\endcsname\relax
  315: {\errhelp=\EMsimple \errmessage{Undefined command @begin #1}}\else
  316: \csname #1\endcsname\fi}
  317: 
  318: % @end foo executes the definition of \Efoo.
  319: %
  320: \def\end{\parsearg\endxxx}
  321: \def\endxxx #1{%
  322:   \removeactivespaces{#1}%
  323:   \edef\endthing{\the\toks0}%
  324:   %
  325:   \expandafter\ifx\csname E\endthing\endcsname\relax
  326:     \expandafter\ifx\csname \endthing\endcsname\relax
  327:       % There's no \foo, i.e., no ``environment'' foo.
  328:       \errhelp = \EMsimple
  329:       \errmessage{Undefined command `@end \endthing'}%
  330:     \else
  331:       \unmatchedenderror\endthing
  332:     \fi
  333:   \else
  334:     % Everything's ok; the right environment has been started.
  335:     \csname E\endthing\endcsname
  336:   \fi
  337: }
  338: 
  339: % There is an environment #1, but it hasn't been started.  Give an error.
  340: %
  341: \def\unmatchedenderror#1{%
  342:   \errhelp = \EMsimple
  343:   \errmessage{This `@end #1' doesn't have a matching `@#1'}%
  344: }
  345: 
  346: % Define the control sequence \E#1 to give an unmatched @end error.
  347: %
  348: \def\defineunmatchedend#1{%
  349:   \expandafter\def\csname E#1\endcsname{\unmatchedenderror{#1}}%
  350: }
  351: 
  352: 
  353: % Single-spacing is done by various environments (specifically, in
  354: % \nonfillstart and \quotations).
  355: \newskip\singlespaceskip \singlespaceskip = 12.5pt
  356: \def\singlespace{%
  357:   % Why was this kern here?  It messes up equalizing space above and below
  358:   % environments.  --karl, 6may93
  359:   %{\advance \baselineskip by -\singlespaceskip
  360:   %\kern \baselineskip}%
  361:   \setleading \singlespaceskip
  362: }
  363: 
  364: %% Simple single-character @ commands
  365: 
  366: % @@ prints an @
  367: % Kludge this until the fonts are right (grr).
  368: \def\@{{\tt \char '100}}
  369: 
  370: % This is turned off because it was never documented
  371: % and you can use @w{...} around a quote to suppress ligatures.
  372: %% Define @` and @' to be the same as ` and '
  373: %% but suppressing ligatures.
  374: %\def\`{{`}}
  375: %\def\'{{'}}
  376: 
  377: % Used to generate quoted braces.
  378: \def\mylbrace {{\tt \char '173}}
  379: \def\myrbrace {{\tt \char '175}}
  380: \let\{=\mylbrace
  381: \let\}=\myrbrace
  382: \begingroup
  383:   % Definitions to produce actual \{ & \} command in an index.
  384:   \catcode`\{ = 12 \catcode`\} = 12
  385:   \catcode`\[ = 1 \catcode`\] = 2
  386:   \catcode`\@ = 0 \catcode`\\ = 12
  387:   @gdef@lbracecmd[\{]%
  388:   @gdef@rbracecmd[\}]%
  389: @endgroup
  390: 
  391: % Accents: @, @dotaccent @ringaccent @ubaraccent @udotaccent
  392: % Others are defined by plain TeX: @` @' @" @^ @~ @= @v @H.
  393: \let\, = \c
  394: \let\dotaccent = \.
  395: \def\ringaccent#1{{\accent23 #1}}
  396: \let\tieaccent = \t
  397: \let\ubaraccent = \b
  398: \let\udotaccent = \d
  399: 
  400: % Other special characters: @questiondown @exclamdown
  401: % Plain TeX defines: @AA @AE @O @OE @L (and lowercase versions) @ss.
  402: \def\questiondown{?`}
  403: \def\exclamdown{!`}
  404: 
  405: % Dotless i and dotless j, used for accents.
  406: \def\imacro{i}
  407: \def\jmacro{j}
  408: \def\dotless#1{%
  409:   \def\temp{#1}%
  410:   \ifx\temp\imacro \ptexi
  411:   \else\ifx\temp\jmacro \j
  412:   \else \errmessage{@dotless can be used only with i or j}%
  413:   \fi\fi
  414: }
  415: 
  416: % @: forces normal size whitespace following.
  417: \def\:{\spacefactor=1000 }
  418: 
  419: % @* forces a line break.
  420: \def\*{\hfil\break\hbox{}\ignorespaces}
  421: 
  422: % @. is an end-of-sentence period.
  423: \def\.{.\spacefactor=3000 }
  424: 
  425: % @enddots{} is an end-of-sentence ellipsis.
  426: \gdef\enddots{$\mathinner{\ldotp\ldotp\ldotp\ldotp}$\spacefactor=3000}
  427: 
  428: % @! is an end-of-sentence bang.
  429: \gdef\!{!\spacefactor=3000 }
  430: 
  431: % @? is an end-of-sentence query.
  432: \gdef\?{?\spacefactor=3000 }
  433: 
  434: % @w prevents a word break.  Without the \leavevmode, @w at the
  435: % beginning of a paragraph, when TeX is still in vertical mode, would
  436: % produce a whole line of output instead of starting the paragraph.
  437: \def\w#1{\leavevmode\hbox{#1}}
  438: 
  439: % @group ... @end group forces ... to be all on one page, by enclosing
  440: % it in a TeX vbox.  We use \vtop instead of \vbox to construct the box
  441: % to keep its height that of a normal line.  According to the rules for
  442: % \topskip (p.114 of the TeXbook), the glue inserted is
  443: % max (\topskip - \ht (first item), 0).  If that height is large,
  444: % therefore, no glue is inserted, and the space between the headline and
  445: % the text is small, which looks bad.
  446: %
  447: \def\group{\begingroup
  448:   \ifnum\catcode13=\active \else
  449:     \errhelp = \groupinvalidhelp
  450:     \errmessage{@group invalid in context where filling is enabled}%
  451:   \fi
  452:   %
  453:   % The \vtop we start below produces a box with normal height and large
  454:   % depth; thus, TeX puts \baselineskip glue before it, and (when the
  455:   % next line of text is done) \lineskip glue after it.  (See p.82 of
  456:   % the TeXbook.)  Thus, space below is not quite equal to space
  457:   % above.  But it's pretty close.
  458:   \def\Egroup{%
  459:     \egroup           % End the \vtop.
  460:     \endgroup         % End the \group.
  461:   }%
  462:   %
  463:   \vtop\bgroup
  464:     % We have to put a strut on the last line in case the @group is in
  465:     % the midst of an example, rather than completely enclosing it.
  466:     % Otherwise, the interline space between the last line of the group
  467:     % and the first line afterwards is too small.  But we can't put the
  468:     % strut in \Egroup, since there it would be on a line by itself.
  469:     % Hence this just inserts a strut at the beginning of each line.
  470:     \everypar = {\strut}%
  471:     %
  472:     % Since we have a strut on every line, we don't need any of TeX's
  473:     % normal interline spacing.
  474:     \offinterlineskip
  475:     %
  476:     % OK, but now we have to do something about blank
  477:     % lines in the input in @example-like environments, which normally
  478:     % just turn into \lisppar, which will insert no space now that we've
  479:     % turned off the interline space.  Simplest is to make them be an
  480:     % empty paragraph.
  481:     \ifx\par\lisppar
  482:       \edef\par{\leavevmode \par}%
  483:       %
  484:       % Reset ^^M's definition to new definition of \par.
  485:       \obeylines
  486:     \fi
  487:     %
  488:     % Do @comment since we are called inside an environment such as
  489:     % @example, where each end-of-line in the input causes an
  490:     % end-of-line in the output.  We don't want the end-of-line after
  491:     % the `@group' to put extra space in the output.  Since @group
  492:     % should appear on a line by itself (according to the Texinfo
  493:     % manual), we don't worry about eating any user text.
  494:     \comment
  495: }
  496: %
  497: % TeX puts in an \escapechar (i.e., `@') at the beginning of the help
  498: % message, so this ends up printing `@group can only ...'.
  499: %
  500: \newhelp\groupinvalidhelp{%
  501: group can only be used in environments such as @example,^^J%
  502: where each line of input produces a line of output.}
  503: 
  504: % @need space-in-mils
  505: % forces a page break if there is not space-in-mils remaining.
  506: 
  507: \newdimen\mil  \mil=0.001in
  508: 
  509: \def\need{\parsearg\needx}
  510: 
  511: % Old definition--didn't work.
  512: %\def\needx #1{\par %
  513: %% This method tries to make TeX break the page naturally
  514: %% if the depth of the box does not fit.
  515: %{\baselineskip=0pt%
  516: %\vtop to #1\mil{\vfil}\kern -#1\mil\penalty 10000
  517: %\prevdepth=-1000pt
  518: %}}
  519: 
  520: \def\needx#1{%
  521:   % Go into vertical mode, so we don't make a big box in the middle of a
  522:   % paragraph.
  523:   \par
  524:   %
  525:   % Don't add any leading before our big empty box, but allow a page
  526:   % break, since the best break might be right here.
  527:   \allowbreak
  528:   \nointerlineskip
  529:   \vtop to #1\mil{\vfil}%
  530:   %
  531:   % TeX does not even consider page breaks if a penalty added to the
  532:   % main vertical list is 10000 or more.  But in order to see if the
  533:   % empty box we just added fits on the page, we must make it consider
  534:   % page breaks.  On the other hand, we don't want to actually break the
  535:   % page after the empty box.  So we use a penalty of 9999.
  536:   %
  537:   % There is an extremely small chance that TeX will actually break the
  538:   % page at this \penalty, if there are no other feasible breakpoints in
  539:   % sight.  (If the user is using lots of big @group commands, which
  540:   % almost-but-not-quite fill up a page, TeX will have a hard time doing
  541:   % good page breaking, for example.)  However, I could not construct an
  542:   % example where a page broke at this \penalty; if it happens in a real
  543:   % document, then we can reconsider our strategy.
  544:   \penalty9999
  545:   %
  546:   % Back up by the size of the box, whether we did a page break or not.
  547:   \kern -#1\mil
  548:   %
  549:   % Do not allow a page break right after this kern.
  550:   \nobreak
  551: }
  552: 
  553: % @br   forces paragraph break
  554: 
  555: \let\br = \par
  556: 
  557: % @dots{}  output some dots
  558: 
  559: \def\dots{$\ldots$}
  560: 
  561: % @page    forces the start of a new page
  562: 
  563: \def\page{\par\vfill\supereject}
  564: 
  565: % @exdent text....
  566: % outputs text on separate line in roman font, starting at standard page margin
  567: 
  568: % This records the amount of indent in the innermost environment.
  569: % That's how much \exdent should take out.
  570: \newskip\exdentamount
  571: 
  572: % This defn is used inside fill environments such as @defun.
  573: \def\exdent{\parsearg\exdentyyy}
  574: \def\exdentyyy #1{{\hfil\break\hbox{\kern -\exdentamount{\rm#1}}\hfil\break}}
  575: 
  576: % This defn is used inside nofill environments such as @example.
  577: \def\nofillexdent{\parsearg\nofillexdentyyy}
  578: \def\nofillexdentyyy #1{{\advance \leftskip by -\exdentamount
  579: \leftline{\hskip\leftskip{\rm#1}}}}
  580: 
  581: % @inmargin{TEXT} puts TEXT in the margin next to the current paragraph.
  582: 
  583: \def\inmargin#1{%
  584: \strut\vadjust{\nobreak\kern-\strutdepth
  585:   \vtop to \strutdepth{\baselineskip\strutdepth\vss
  586:   \llap{\rightskip=\inmarginspacing \vbox{\noindent #1}}\null}}}
  587: \newskip\inmarginspacing \inmarginspacing=1cm
  588: \def\strutdepth{\dp\strutbox}
  589: 
  590: %\hbox{{\rm#1}}\hfil\break}}
  591: 
  592: % @include file    insert text of that file as input.
  593: % Allow normal characters that  we make active in the argument (a file name).
  594: \def\include{\begingroup
  595:   \catcode`\\=12
  596:   \catcode`~=12
  597:   \catcode`^=12
  598:   \catcode`_=12
  599:   \catcode`|=12
  600:   \catcode`<=12
  601:   \catcode`>=12
  602:   \catcode`+=12
  603:   \parsearg\includezzz}
  604: % Restore active chars for included file.
  605: \def\includezzz#1{\endgroup\begingroup
  606:   % Read the included file in a group so nested @include's work.
  607:   \def\thisfile{#1}%
  608:   \input\thisfile
  609: \endgroup}
  610: 
  611: \def\thisfile{}
  612: 
  613: % @center line   outputs that line, centered
  614: 
  615: \def\center{\parsearg\centerzzz}
  616: \def\centerzzz #1{{\advance\hsize by -\leftskip
  617: \advance\hsize by -\rightskip
  618: \centerline{#1}}}
  619: 
  620: % @sp n   outputs n lines of vertical space
  621: 
  622: \def\sp{\parsearg\spxxx}
  623: \def\spxxx #1{\vskip #1\baselineskip}
  624: 
  625: % @comment ...line which is ignored...
  626: % @c is the same as @comment
  627: % @ignore ... @end ignore  is another way to write a comment
  628: 
  629: \def\comment{\catcode 64=\other \catcode 123=\other \catcode 125=\other%
  630: \parsearg \commentxxx}
  631: 
  632: \def\commentxxx #1{\catcode 64=0 \catcode 123=1 \catcode 125=2 }
  633: 
  634: \let\c=\comment
  635: 
  636: % @paragraphindent  is defined for the Info formatting commands only.
  637: \let\paragraphindent=\comment
  638: 
  639: % Prevent errors for section commands.
  640: % Used in @ignore and in failing conditionals.
  641: \def\ignoresections{%
  642: \let\chapter=\relax
  643: \let\unnumbered=\relax
  644: \let\top=\relax
  645: \let\unnumberedsec=\relax
  646: \let\unnumberedsection=\relax
  647: \let\unnumberedsubsec=\relax
  648: \let\unnumberedsubsection=\relax
  649: \let\unnumberedsubsubsec=\relax
  650: \let\unnumberedsubsubsection=\relax
  651: \let\section=\relax
  652: \let\subsec=\relax
  653: \let\subsubsec=\relax
  654: \let\subsection=\relax
  655: \let\subsubsection=\relax
  656: \let\appendix=\relax
  657: \let\appendixsec=\relax
  658: \let\appendixsection=\relax
  659: \let\appendixsubsec=\relax
  660: \let\appendixsubsection=\relax
  661: \let\appendixsubsubsec=\relax
  662: \let\appendixsubsubsection=\relax
  663: \let\contents=\relax
  664: \let\smallbook=\relax
  665: \let\titlepage=\relax
  666: }
  667: 
  668: % Used in nested conditionals, where we have to parse the Texinfo source
  669: % and so want to turn off most commands, in case they are used
  670: % incorrectly.
  671: %
  672: \def\ignoremorecommands{%
  673:   \let\defcodeindex = \relax
  674:   \let\defcv = \relax
  675:   \let\deffn = \relax
  676:   \let\deffnx = \relax
  677:   \let\defindex = \relax
  678:   \let\defivar = \relax
  679:   \let\defmac = \relax
  680:   \let\defmethod = \relax
  681:   \let\defop = \relax
  682:   \let\defopt = \relax
  683:   \let\defspec = \relax
  684:   \let\deftp = \relax
  685:   \let\deftypefn = \relax
  686:   \let\deftypefun = \relax
  687:   \let\deftypevar = \relax
  688:   \let\deftypevr = \relax
  689:   \let\defun = \relax
  690:   \let\defvar = \relax
  691:   \let\defvr = \relax
  692:   \let\ref = \relax
  693:   \let\xref = \relax
  694:   \let\printindex = \relax
  695:   \let\pxref = \relax
  696:   \let\settitle = \relax
  697:   \let\setchapternewpage = \relax
  698:   \let\setchapterstyle = \relax
  699:   \let\everyheading = \relax
  700:   \let\evenheading = \relax
  701:   \let\oddheading = \relax
  702:   \let\everyfooting = \relax
  703:   \let\evenfooting = \relax
  704:   \let\oddfooting = \relax
  705:   \let\headings = \relax
  706:   \let\include = \relax
  707:   \let\lowersections = \relax
  708:   \let\down = \relax
  709:   \let\raisesections = \relax
  710:   \let\up = \relax
  711:   \let\set = \relax
  712:   \let\clear = \relax
  713:   \let\item = \relax
  714: }
  715: 
  716: % Ignore @ignore ... @end ignore.
  717: %
  718: \def\ignore{\doignore{ignore}}
  719: 
  720: % Also ignore @ifinfo, @ifhtml, @html, @menu, and @direntry text.
  721: %
  722: \def\ifinfo{\doignore{ifinfo}}
  723: \def\ifhtml{\doignore{ifhtml}}
  724: \def\html{\doignore{html}}
  725: \def\menu{\doignore{menu}}
  726: \def\direntry{\doignore{direntry}}
  727: 
  728: % Also ignore @macro ... @end macro.  The user must run texi2dvi,
  729: % which runs makeinfo to do macro expansion.  Ignore @unmacro, too.
  730: \def\macro{\doignore{macro}}
  731: \let\unmacro = \comment
  732: 
  733: 
  734: % @dircategory CATEGORY  -- specify a category of the dir file
  735: % which this file should belong to.  Ignore this in TeX.
  736: \let\dircategory = \comment
  737: 
  738: % Ignore text until a line `@end #1'.
  739: %
  740: \def\doignore#1{\begingroup
  741:   % Don't complain about control sequences we have declared \outer.
  742:   \ignoresections
  743:   %
  744:   % Define a command to swallow text until we reach `@end #1'.
  745:   \long\def\doignoretext##1\end #1{\enddoignore}%
  746:   %
  747:   % Make sure that spaces turn into tokens that match what \doignoretext wants.
  748:   \catcode32 = 10
  749:   %
  750:   % And now expand that command.
  751:   \doignoretext
  752: }
  753: 
  754: % What we do to finish off ignored text.
  755: %
  756: \def\enddoignore{\endgroup\ignorespaces}%
  757: 
  758: \newif\ifwarnedobs\warnedobsfalse
  759: \def\obstexwarn{%
  760:   \ifwarnedobs\relax\else
  761:   % We need to warn folks that they may have trouble with TeX 3.0.
  762:   % This uses \immediate\write16 rather than \message to get newlines.
  763:     \immediate\write16{}
  764:     \immediate\write16{***WARNING*** for users of Unix TeX 3.0!}
  765:     \immediate\write16{This manual trips a bug in TeX version 3.0 (tex hangs).}
  766:     \immediate\write16{If you are running another version of TeX, relax.}
  767:     \immediate\write16{If you are running Unix TeX 3.0, kill this TeX process.}
  768:     \immediate\write16{  Then upgrade your TeX installation if you can.}
  769:     \immediate\write16{  (See ftp://ftp.gnu.ai.mit.edu/pub/gnu/TeX.README.)}
  770:     \immediate\write16{If you are stuck with version 3.0, run the}
  771:     \immediate\write16{  script ``tex3patch'' from the Texinfo distribution}
  772:     \immediate\write16{  to use a workaround.}
  773:     \immediate\write16{}
  774:     \global\warnedobstrue
  775:     \fi
  776: }
  777: 
  778: % **In TeX 3.0, setting text in \nullfont hangs tex.  For a
  779: % workaround (which requires the file ``dummy.tfm'' to be installed),
  780: % uncomment the following line:
  781: %%%%%\font\nullfont=dummy\let\obstexwarn=\relax
  782: 
  783: % Ignore text, except that we keep track of conditional commands for
  784: % purposes of nesting, up to an `@end #1' command.
  785: %
  786: \def\nestedignore#1{%
  787:   \obstexwarn
  788:   % We must actually expand the ignored text to look for the @end
  789:   % command, so that nested ignore constructs work.  Thus, we put the
  790:   % text into a \vbox and then do nothing with the result.  To minimize
  791:   % the change of memory overflow, we follow the approach outlined on
  792:   % page 401 of the TeXbook: make the current font be a dummy font.
  793:   %
  794:   \setbox0 = \vbox\bgroup
  795:     % Don't complain about control sequences we have declared \outer.
  796:     \ignoresections
  797:     %
  798:     % Define `@end #1' to end the box, which will in turn undefine the
  799:     % @end command again.
  800:     \expandafter\def\csname E#1\endcsname{\egroup\ignorespaces}%
  801:     %
  802:     % We are going to be parsing Texinfo commands.  Most cause no
  803:     % trouble when they are used incorrectly, but some commands do
  804:     % complicated argument parsing or otherwise get confused, so we
  805:     % undefine them.
  806:     %
  807:     % We can't do anything about stray @-signs, unfortunately;
  808:     % they'll produce `undefined control sequence' errors.
  809:     \ignoremorecommands
  810:     %
  811:     % Set the current font to be \nullfont, a TeX primitive, and define
  812:     % all the font commands to also use \nullfont.  We don't use
  813:     % dummy.tfm, as suggested in the TeXbook, because not all sites
  814:     % might have that installed.  Therefore, math mode will still
  815:     % produce output, but that should be an extremely small amount of
  816:     % stuff compared to the main input.
  817:     %
  818:     \nullfont
  819:     \let\tenrm = \nullfont  \let\tenit = \nullfont  \let\tensl = \nullfont
  820:     \let\tenbf = \nullfont  \let\tentt = \nullfont  \let\smallcaps = \nullfont
  821:     \let\tensf = \nullfont
  822:     % Similarly for index fonts (mostly for their use in
  823:     % smallexample)
  824:     \let\indrm = \nullfont  \let\indit = \nullfont  \let\indsl = \nullfont
  825:     \let\indbf = \nullfont  \let\indtt = \nullfont  \let\indsc = \nullfont
  826:     \let\indsf = \nullfont
  827:     %
  828:     % Don't complain when characters are missing from the fonts.
  829:     \tracinglostchars = 0
  830:     %
  831:     % Don't bother to do space factor calculations.
  832:     \frenchspacing
  833:     %
  834:     % Don't report underfull hboxes.
  835:     \hbadness = 10000
  836:     %
  837:     % Do minimal line-breaking.
  838:     \pretolerance = 10000
  839:     %
  840:     % Do not execute instructions in @tex
  841:     \def\tex{\doignore{tex}}
  842: }
  843: 
  844: % @set VAR sets the variable VAR to an empty value.
  845: % @set VAR REST-OF-LINE sets VAR to the value REST-OF-LINE.
  846: %
  847: % Since we want to separate VAR from REST-OF-LINE (which might be
  848: % empty), we can't just use \parsearg; we have to insert a space of our
  849: % own to delimit the rest of the line, and then take it out again if we
  850: % didn't need it.  Make sure the catcode of space is correct to avoid
  851: % losing inside @example, for instance.
  852: %
  853: \def\set{\begingroup\catcode` =10 \parsearg\setxxx}
  854: \def\setxxx#1{\setyyy#1 \endsetyyy}
  855: \def\setyyy#1 #2\endsetyyy{%
  856:   \def\temp{#2}%
  857:   \ifx\temp\empty \global\expandafter\let\csname SET#1\endcsname = \empty
  858:   \else \setzzz{#1}#2\endsetzzz % Remove the trailing space \setxxx inserted.
  859:   \fi
  860:   \endgroup
  861: }
  862: % Can't use \xdef to pre-expand #2 and save some time, since \temp or
  863: % \next or other control sequences that we've defined might get us into
  864: % an infinite loop. Consider `@set foo @cite{bar}'.
  865: \def\setzzz#1#2 \endsetzzz{\expandafter\gdef\csname SET#1\endcsname{#2}}
  866: 
  867: % @clear VAR clears (i.e., unsets) the variable VAR.
  868: %
  869: \def\clear{\parsearg\clearxxx}
  870: \def\clearxxx#1{\global\expandafter\let\csname SET#1\endcsname=\relax}
  871: 
  872: % @value{foo} gets the text saved in variable foo.
  873: %
  874: \def\value#1{\expandafter
  875:                 \ifx\csname SET#1\endcsname\relax
  876:                         {\{No value for ``#1''\}}
  877:                 \else \csname SET#1\endcsname \fi}
  878: 
  879: % @ifset VAR ... @end ifset reads the `...' iff VAR has been defined
  880: % with @set.
  881: %
  882: \def\ifset{\parsearg\ifsetxxx}
  883: \def\ifsetxxx #1{%
  884:   \expandafter\ifx\csname SET#1\endcsname\relax
  885:     \expandafter\ifsetfail
  886:   \else
  887:     \expandafter\ifsetsucceed
  888:   \fi
  889: }
  890: \def\ifsetsucceed{\conditionalsucceed{ifset}}
  891: \def\ifsetfail{\nestedignore{ifset}}
  892: \defineunmatchedend{ifset}
  893: 
  894: % @ifclear VAR ... @end ifclear reads the `...' iff VAR has never been
  895: % defined with @set, or has been undefined with @clear.
  896: %
  897: \def\ifclear{\parsearg\ifclearxxx}
  898: \def\ifclearxxx #1{%
  899:   \expandafter\ifx\csname SET#1\endcsname\relax
  900:     \expandafter\ifclearsucceed
  901:   \else
  902:     \expandafter\ifclearfail
  903:   \fi
  904: }
  905: \def\ifclearsucceed{\conditionalsucceed{ifclear}}
  906: \def\ifclearfail{\nestedignore{ifclear}}
  907: \defineunmatchedend{ifclear}
  908: 
  909: % @iftex always succeeds; we read the text following, through @end
  910: % iftex).  But `@end iftex' should be valid only after an @iftex.
  911: %
  912: \def\iftex{\conditionalsucceed{iftex}}
  913: \defineunmatchedend{iftex}
  914: 
  915: % We can't just want to start a group at @iftex (for example) and end it
  916: % at @end iftex, since then @set commands inside the conditional have no
  917: % effect (they'd get reverted at the end of the group).  So we must
  918: % define \Eiftex to redefine itself to be its previous value.  (We can't
  919: % just define it to fail again with an ``unmatched end'' error, since
  920: % the @ifset might be nested.)
  921: %
  922: \def\conditionalsucceed#1{%
  923:   \edef\temp{%
  924:     % Remember the current value of \E#1.
  925:     \let\nece{prevE#1} = \nece{E#1}%
  926:     %
  927:     % At the `@end #1', redefine \E#1 to be its previous value.
  928:     \def\nece{E#1}{\let\nece{E#1} = \nece{prevE#1}}%
  929:   }%
  930:   \temp
  931: }
  932: 
  933: % We need to expand lots of \csname's, but we don't want to expand the
  934: % control sequences after we've constructed them.
  935: %
  936: \def\nece#1{\expandafter\noexpand\csname#1\endcsname}
  937: 
  938: % @asis just yields its argument.  Used with @table, for example.
  939: %
  940: \def\asis#1{#1}
  941: 
  942: % @math means output in math mode.
  943: % We don't use $'s directly in the definition of \math because control
  944: % sequences like \math are expanded when the toc file is written.  Then,
  945: % we read the toc file back, the $'s will be normal characters (as they
  946: % should be, according to the definition of Texinfo).  So we must use a
  947: % control sequence to switch into and out of math mode.
  948: %
  949: % This isn't quite enough for @math to work properly in indices, but it
  950: % seems unlikely it will ever be needed there.
  951: %
  952: \let\implicitmath = $
  953: \def\math#1{\implicitmath #1\implicitmath}
  954: 
  955: % @bullet and @minus need the same treatment as @math, just above.
  956: \def\bullet{\implicitmath\ptexbullet\implicitmath}
  957: \def\minus{\implicitmath-\implicitmath}
  958: 
  959: \def\node{\ENVcheck\parsearg\nodezzz}
  960: \def\nodezzz#1{\nodexxx [#1,]}
  961: \def\nodexxx[#1,#2]{\gdef\lastnode{#1}}
  962: \let\nwnode=\node
  963: \let\lastnode=\relax
  964: 
  965: \def\donoderef{\ifx\lastnode\relax\else
  966: \expandafter\expandafter\expandafter\setref{\lastnode}\fi
  967: \global\let\lastnode=\relax}
  968: 
  969: \def\unnumbnoderef{\ifx\lastnode\relax\else
  970: \expandafter\expandafter\expandafter\unnumbsetref{\lastnode}\fi
  971: \global\let\lastnode=\relax}
  972: 
  973: \def\appendixnoderef{\ifx\lastnode\relax\else
  974: \expandafter\expandafter\expandafter\appendixsetref{\lastnode}\fi
  975: \global\let\lastnode=\relax}
  976: 
  977: % @refill is a no-op.
  978: \let\refill=\relax
  979: 
  980: % @setfilename is done at the beginning of every texinfo file.
  981: % So open here the files we need to have open while reading the input.
  982: % This makes it possible to make a .fmt file for texinfo.
  983: \def\setfilename{%
  984:    \readauxfile
  985:    \opencontents
  986:    \openindices
  987:    \fixbackslash  % Turn off hack to swallow `\input texinfo'.
  988:    \global\let\setfilename=\comment % Ignore extra @setfilename cmds.
  989:    \comment % Ignore the actual filename.
  990: }
  991: 
  992: % @bye.
  993: \outer\def\bye{\pagealignmacro\tracingstats=1\ptexend}
  994: 
  995: % \def\macro#1{\begingroup\ignoresections\catcode`\#=6\def\macrotemp{#1}\parsearg\macroxxx}
  996: % \def\macroxxx#1#2 \end macro{%
  997: % \expandafter\gdef\macrotemp#1{#2}%
  998: % \endgroup}
  999: 
 1000: %\def\linemacro#1{\begingroup\ignoresections\catcode`\#=6\def\macrotemp{#1}\parsearg\linemacroxxx}
 1001: %\def\linemacroxxx#1#2 \end linemacro{%
 1002: %\let\parsearg=\relax
 1003: %\edef\macrotempx{\csname M\butfirst\expandafter\string\macrotemp\endcsname}%
 1004: %\expandafter\xdef\macrotemp{\parsearg\macrotempx}%
 1005: %\expandafter\gdef\macrotempx#1{#2}%
 1006: %\endgroup}
 1007: 
 1008: %\def\butfirst#1{}
 1009: 
 1010: 
 1011: \message{fonts,}
 1012: 
 1013: % Font-change commands.
 1014: 
 1015: % Texinfo supports the sans serif font style, which plain TeX does not.
 1016: % So we set up a \sf analogous to plain's \rm, etc.
 1017: \newfam\sffam
 1018: \def\sf{\fam=\sffam \tensf}
 1019: \let\li = \sf % Sometimes we call it \li, not \sf.
 1020: 
 1021: % We don't need math for this one.
 1022: \def\ttsl{\tenttsl}
 1023: 
 1024: %% Try out Computer Modern fonts at \magstephalf
 1025: \let\mainmagstep=\magstephalf
 1026: 
 1027: % Set the font macro #1 to the font named #2, adding on the
 1028: % specified font prefix (normally `cm').
 1029: % #3 is the font's design size, #4 is a scale factor
 1030: \def\setfont#1#2#3#4{\font#1=\fontprefix#2#3 scaled #4}
 1031: 
 1032: % Use cm as the default font prefix.
 1033: % To specify the font prefix, you must define \fontprefix
 1034: % before you read in texinfo.tex.
 1035: \ifx\fontprefix\undefined
 1036: \def\fontprefix{cm}
 1037: \fi
 1038: % Support font families that don't use the same naming scheme as CM.
 1039: \def\rmshape{r}
 1040: \def\rmbshape{bx}               %where the normal face is bold
 1041: \def\bfshape{b}
 1042: \def\bxshape{bx}
 1043: \def\ttshape{tt}
 1044: \def\ttbshape{tt}
 1045: \def\ttslshape{sltt}
 1046: \def\itshape{ti}
 1047: \def\itbshape{bxti}
 1048: \def\slshape{sl}
 1049: \def\slbshape{bxsl}
 1050: \def\sfshape{ss}
 1051: \def\sfbshape{ss}
 1052: \def\scshape{csc}
 1053: \def\scbshape{csc}
 1054: 
 1055: \ifx\bigger\relax
 1056: \let\mainmagstep=\magstep1
 1057: \setfont\textrm\rmshape{12}{1000}
 1058: \setfont\texttt\ttshape{12}{1000}
 1059: \else
 1060: \setfont\textrm\rmshape{10}{\mainmagstep}
 1061: \setfont\texttt\ttshape{10}{\mainmagstep}
 1062: \fi
 1063: % Instead of cmb10, you many want to use cmbx10.
 1064: % cmbx10 is a prettier font on its own, but cmb10
 1065: % looks better when embedded in a line with cmr10.
 1066: \setfont\textbf\bfshape{10}{\mainmagstep}
 1067: \setfont\textit\itshape{10}{\mainmagstep}
 1068: \setfont\textsl\slshape{10}{\mainmagstep}
 1069: \setfont\textsf\sfshape{10}{\mainmagstep}
 1070: \setfont\textsc\scshape{10}{\mainmagstep}
 1071: \setfont\textttsl\ttslshape{10}{\mainmagstep}
 1072: \font\texti=cmmi10 scaled \mainmagstep
 1073: \font\textsy=cmsy10 scaled \mainmagstep
 1074: 
 1075: % A few fonts for @defun, etc.
 1076: \setfont\defbf\bxshape{10}{\magstep1} %was 1314
 1077: \setfont\deftt\ttshape{10}{\magstep1}
 1078: \def\df{\let\tentt=\deftt \let\tenbf = \defbf \bf}
 1079: 
 1080: % Fonts for indices and small examples (9pt).
 1081: % We actually use the slanted font rather than the italic,
 1082: % because texinfo normally uses the slanted fonts for that.
 1083: % Do not make many font distinctions in general in the index, since they
 1084: % aren't very useful.
 1085: \setfont\ninett\ttshape{9}{1000}
 1086: \setfont\indrm\rmshape{9}{1000}
 1087: \setfont\indit\slshape{9}{1000}
 1088: \let\indsl=\indit
 1089: \let\indtt=\ninett
 1090: \let\indttsl=\ninett
 1091: \let\indsf=\indrm
 1092: \let\indbf=\indrm
 1093: \setfont\indsc\scshape{10}{900}
 1094: \font\indi=cmmi9
 1095: \font\indsy=cmsy9
 1096: 
 1097: % Chapter (and unnumbered) fonts (17.28pt).
 1098: \setfont\chaprm\rmbshape{12}{\magstep2}
 1099: \setfont\chapit\itbshape{10}{\magstep3}
 1100: \setfont\chapsl\slbshape{10}{\magstep3}
 1101: \setfont\chaptt\ttbshape{12}{\magstep2}
 1102: \setfont\chapttsl\ttslshape{10}{\magstep3}
 1103: \setfont\chapsf\sfbshape{12}{\magstep2}
 1104: \let\chapbf=\chaprm
 1105: \setfont\chapsc\scbshape{10}{\magstep3}
 1106: \font\chapi=cmmi12 scaled \magstep2
 1107: \font\chapsy=cmsy10 scaled \magstep3
 1108: 
 1109: % Section fonts (14.4pt).
 1110: \setfont\secrm\rmbshape{12}{\magstep1}
 1111: \setfont\secit\itbshape{10}{\magstep2}
 1112: \setfont\secsl\slbshape{10}{\magstep2}
 1113: \setfont\sectt\ttbshape{12}{\magstep1}
 1114: \setfont\secttsl\ttslshape{10}{\magstep2}
 1115: \setfont\secsf\sfbshape{12}{\magstep1}
 1116: \let\secbf\secrm
 1117: \setfont\secsc\scbshape{10}{\magstep2}
 1118: \font\seci=cmmi12 scaled \magstep1
 1119: \font\secsy=cmsy10 scaled \magstep2
 1120: 
 1121: % \setfont\ssecrm\bxshape{10}{\magstep1}    % This size an font looked bad.
 1122: % \setfont\ssecit\itshape{10}{\magstep1}    % The letters were too crowded.
 1123: % \setfont\ssecsl\slshape{10}{\magstep1}
 1124: % \setfont\ssectt\ttshape{10}{\magstep1}
 1125: % \setfont\ssecsf\sfshape{10}{\magstep1}
 1126: 
 1127: %\setfont\ssecrm\bfshape{10}{1315}      % Note the use of cmb rather than cmbx.
 1128: %\setfont\ssecit\itshape{10}{1315}      % Also, the size is a little larger than
 1129: %\setfont\ssecsl\slshape{10}{1315}      % being scaled magstep1.
 1130: %\setfont\ssectt\ttshape{10}{1315}
 1131: %\setfont\ssecsf\sfshape{10}{1315}
 1132: 
 1133: %\let\ssecbf=\ssecrm
 1134: 
 1135: % Subsection fonts (13.15pt).
 1136: \setfont\ssecrm\rmbshape{12}{\magstephalf}
 1137: \setfont\ssecit\itbshape{10}{1315}
 1138: \setfont\ssecsl\slbshape{10}{1315}
 1139: \setfont\ssectt\ttbshape{12}{\magstephalf}
 1140: \setfont\ssecttsl\ttslshape{10}{\magstep1}
 1141: \setfont\ssecsf\sfbshape{12}{\magstephalf}
 1142: \let\ssecbf\ssecrm
 1143: \setfont\ssecsc\scbshape{10}{\magstep1}
 1144: \font\sseci=cmmi12 scaled \magstephalf
 1145: \font\ssecsy=cmsy10 scaled \magstep1
 1146: % The smallcaps and symbol fonts should actually be scaled \magstep1.5,
 1147: % but that is not a standard magnification.
 1148: 
 1149: % Fonts for title page:
 1150: \setfont\titlerm\rmbshape{12}{\magstep3}
 1151: \let\authorrm = \secrm
 1152: 
 1153: % In order for the font changes to affect most math symbols and letters,
 1154: % we have to define the \textfont of the standard families.  Since
 1155: % texinfo doesn't allow for producing subscripts and superscripts, we
 1156: % don't bother to reset \scriptfont and \scriptscriptfont (which would
 1157: % also require loading a lot more fonts).
 1158: %
 1159: \def\resetmathfonts{%
 1160:   \textfont0 = \tenrm \textfont1 = \teni \textfont2 = \tensy
 1161:   \textfont\itfam = \tenit \textfont\slfam = \tensl \textfont\bffam = \tenbf
 1162:   \textfont\ttfam = \tentt \textfont\sffam = \tensf
 1163: }
 1164: 
 1165: 
 1166: % The font-changing commands redefine the meanings of \tenSTYLE, instead
 1167: % of just \STYLE.  We do this so that font changes will continue to work
 1168: % in math mode, where it is the current \fam that is relevant in most
 1169: % cases, not the current font.  Plain TeX does \def\bf{\fam=\bffam
 1170: % \tenbf}, for example.  By redefining \tenbf, we obviate the need to
 1171: % redefine \bf itself.
 1172: \def\textfonts{%
 1173:   \let\tenrm=\textrm \let\tenit=\textit \let\tensl=\textsl
 1174:   \let\tenbf=\textbf \let\tentt=\texttt \let\smallcaps=\textsc
 1175:   \let\tensf=\textsf \let\teni=\texti \let\tensy=\textsy \let\tenttsl=\textttsl
 1176:   \resetmathfonts}
 1177: \def\chapfonts{%
 1178:   \let\tenrm=\chaprm \let\tenit=\chapit \let\tensl=\chapsl
 1179:   \let\tenbf=\chapbf \let\tentt=\chaptt \let\smallcaps=\chapsc
 1180:   \let\tensf=\chapsf \let\teni=\chapi \let\tensy=\chapsy \let\tenttsl=\chapttsl
 1181:   \resetmathfonts \setleading{19pt}}
 1182: \def\secfonts{%
 1183:   \let\tenrm=\secrm \let\tenit=\secit \let\tensl=\secsl
 1184:   \let\tenbf=\secbf \let\tentt=\sectt \let\smallcaps=\secsc
 1185:   \let\tensf=\secsf \let\teni=\seci \let\tensy=\secsy \let\tenttsl=\secttsl
 1186:   \resetmathfonts \setleading{16pt}}
 1187: \def\subsecfonts{%
 1188:   \let\tenrm=\ssecrm \let\tenit=\ssecit \let\tensl=\ssecsl
 1189:   \let\tenbf=\ssecbf \let\tentt=\ssectt \let\smallcaps=\ssecsc
 1190:   \let\tensf=\ssecsf \let\teni=\sseci \let\tensy=\ssecsy \let\tenttsl=\ssecttsl
 1191:   \resetmathfonts \setleading{15pt}}
 1192: \let\subsubsecfonts = \subsecfonts % Maybe make sssec fonts scaled magstephalf?
 1193: \def\indexfonts{%
 1194:   \let\tenrm=\indrm \let\tenit=\indit \let\tensl=\indsl
 1195:   \let\tenbf=\indbf \let\tentt=\indtt \let\smallcaps=\indsc
 1196:   \let\tensf=\indsf \let\teni=\indi \let\tensy=\indsy \let\tenttsl=\indttsl
 1197:   \resetmathfonts \setleading{12pt}}
 1198: 
 1199: % Set up the default fonts, so we can use them for creating boxes.
 1200: %
 1201: \textfonts
 1202: 
 1203: % Count depth in font-changes, for error checks
 1204: \newcount\fontdepth \fontdepth=0
 1205: 
 1206: % Fonts for short table of contents.
 1207: \setfont\shortcontrm\rmshape{12}{1000}
 1208: \setfont\shortcontbf\bxshape{12}{1000}
 1209: \setfont\shortcontsl\slshape{12}{1000}
 1210: 
 1211: %% Add scribe-like font environments, plus @l for inline lisp (usually sans
 1212: %% serif) and @ii for TeX italic
 1213: 
 1214: % \smartitalic{ARG} outputs arg in italics, followed by an italic correction
 1215: % unless the following character is such as not to need one.
 1216: \def\smartitalicx{\ifx\next,\else\ifx\next-\else\ifx\next.\else\/\fi\fi\fi}
 1217: \def\smartitalic#1{{\sl #1}\futurelet\next\smartitalicx}
 1218: 
 1219: \let\i=\smartitalic
 1220: \let\var=\smartitalic
 1221: \let\dfn=\smartitalic
 1222: \let\emph=\smartitalic
 1223: \let\cite=\smartitalic
 1224: 
 1225: \def\b#1{{\bf #1}}
 1226: \let\strong=\b
 1227: 
 1228: % We can't just use \exhyphenpenalty, because that only has effect at
 1229: % the end of a paragraph.  Restore normal hyphenation at the end of the
 1230: % group within which \nohyphenation is presumably called.
 1231: %
 1232: \def\nohyphenation{\hyphenchar\font = -1  \aftergroup\restorehyphenation}
 1233: \def\restorehyphenation{\hyphenchar\font = `- }
 1234: 
 1235: \def\t#1{%
 1236:   {\tt \rawbackslash \frenchspacing #1}%
 1237:   \null
 1238: }
 1239: \let\ttfont=\t
 1240: \def\samp #1{`\tclose{#1}'\null}
 1241: \setfont\smallrm\rmshape{8}{1000}
 1242: \font\smallsy=cmsy9
 1243: \def\key#1{{\smallrm\textfont2=\smallsy \leavevmode\hbox{%
 1244:   \raise0.4pt\hbox{$\langle$}\kern-.08em\vtop{%
 1245:     \vbox{\hrule\kern-0.4pt
 1246:      \hbox{\raise0.4pt\hbox{\vphantom{$\langle$}}#1}}%
 1247:     \kern-0.4pt\hrule}%
 1248:   \kern-.06em\raise0.4pt\hbox{$\rangle$}}}}
 1249: % The old definition, with no lozenge:
 1250: %\def\key #1{{\ttsl \nohyphenation \uppercase{#1}}\null}
 1251: \def\ctrl #1{{\tt \rawbackslash \hat}#1}
 1252: 
 1253: \let\file=\samp
 1254: \let\url=\samp % perhaps include a hypertex \special eventually
 1255: \def\email#1{$\langle${\tt #1}$\rangle$}
 1256: 
 1257: % @code is a modification of @t,
 1258: % which makes spaces the same size as normal in the surrounding text.
 1259: \def\tclose#1{%
 1260:   {%
 1261:     % Change normal interword space to be same as for the current font.
 1262:     \spaceskip = \fontdimen2\font
 1263:     %
 1264:     % Switch to typewriter.
 1265:     \tt
 1266:     %
 1267:     % But `\ ' produces the large typewriter interword space.
 1268:     \def\ {{\spaceskip = 0pt{} }}%
 1269:     %
 1270:     % Turn off hyphenation.
 1271:     \nohyphenation
 1272:     %
 1273:     \rawbackslash
 1274:     \frenchspacing
 1275:     #1%
 1276:   }%
 1277:   \null
 1278: }
 1279: 
 1280: % We *must* turn on hyphenation at `-' and `_' in \code.
 1281: % Otherwise, it is too hard to avoid overfull hboxes
 1282: % in the Emacs manual, the Library manual, etc.
 1283: 
 1284: % Unfortunately, TeX uses one parameter (\hyphenchar) to control
 1285: % both hyphenation at - and hyphenation within words.
 1286: % We must therefore turn them both off (\tclose does that)
 1287: % and arrange explicitly to hyphenate at a dash.
 1288: %  -- rms.
 1289: {
 1290: \catcode`\-=\active
 1291: \catcode`\_=\active
 1292: \global\def\code{\begingroup \catcode`\-=\active \let-\codedash \catcode`\_=\active \let_\codeunder \codex}
 1293: % The following is used by \doprintindex to insure that long function names
 1294: % wrap around.  It is necessary for - and _ to be active before the index is
 1295: % read from the file, as \entry parses the arguments long before \code is
 1296: % ever called.  -- mycroft
 1297: \global\def\indexbreaks{\catcode`\-=\active \let-\realdash \catcode`\_=\active \let_\realunder}
 1298: }
 1299: 
 1300: \def\realdash{-}
 1301: \def\realunder{_}
 1302: \def\codedash{-\discretionary{}{}{}}
 1303: \def\codeunder{\normalunderscore\discretionary{}{}{}}
 1304: \def\codex #1{\tclose{#1}\endgroup}
 1305: 
 1306: %\let\exp=\tclose  %Was temporary
 1307: 
 1308: % @kbd is like @code, except that if the argument is just one @key command,
 1309: % then @kbd has no effect.
 1310: %
 1311: \def\xkey{\key}
 1312: \def\kbdfoo#1#2#3\par{\def\one{#1}\def\three{#3}\def\threex{??}%
 1313: \ifx\one\xkey\ifx\threex\three \key{#2}%
 1314: \else{\tclose{\ttsl\look}}\fi
 1315: \else{\tclose{\ttsl\look}}\fi}
 1316: 
 1317: % Check if we are currently using a typewriter font.  Since all the
 1318: % Computer Modern typewriter fonts have zero interword stretch (and
 1319: % shrink), and it is reasonable to expect all typewriter fonts to have
 1320: % this property, we can check that font parameter.
 1321: % 
 1322: \def\ifmonospace{\ifdim\fontdimen3\font=0pt }
 1323: 
 1324: % Typeset a dimension, e.g., `in' or `pt'.  The only reason for the
 1325: % argument is to make the input look right: @dmn{pt} instead of
 1326: % @dmn{}pt.
 1327: %
 1328: \def\dmn#1{\thinspace #1}
 1329: 
 1330: \def\kbd#1{\def\look{#1}\expandafter\kbdfoo\look??\par}
 1331: 
 1332: % @l was never documented to mean ``switch to the Lisp font'',
 1333: % and it is not used as such in any manual I can find.  We need it for
 1334: % Polish suppressed-l.  --karl, 22sep96.
 1335: %\def\l#1{{\li #1}\null}
 1336: 
 1337: \def\r#1{{\rm #1}}              % roman font
 1338: % Use of \lowercase was suggested.
 1339: \def\sc#1{{\smallcaps#1}}       % smallcaps font
 1340: \def\ii#1{{\it #1}}             % italic font
 1341: 
 1342: % @pounds{} is a sterling sign.
 1343: \def\pounds{{\it\$}}
 1344: 
 1345: 
 1346: \message{page headings,}
 1347: 
 1348: \newskip\titlepagetopglue \titlepagetopglue = 1.5in
 1349: \newskip\titlepagebottomglue \titlepagebottomglue = 2pc
 1350: 
 1351: % First the title page.  Must do @settitle before @titlepage.
 1352: \def\titlefont#1{{\titlerm #1}}
 1353: 
 1354: \newif\ifseenauthor
 1355: \newif\iffinishedtitlepage
 1356: 
 1357: \def\shorttitlepage{\parsearg\shorttitlepagezzz}
 1358: \def\shorttitlepagezzz #1{\begingroup\hbox{}\vskip 1.5in \chaprm \centerline{#1}%
 1359:         \endgroup\page\hbox{}\page}
 1360: 
 1361: \def\titlepage{\begingroup \parindent=0pt \textfonts
 1362:    \let\subtitlerm=\tenrm
 1363: % I deinstalled the following change because \cmr12 is undefined.
 1364: % This change was not in the ChangeLog anyway.  --rms.
 1365: %   \let\subtitlerm=\cmr12
 1366:    \def\subtitlefont{\subtitlerm \normalbaselineskip = 13pt \normalbaselines}%
 1367:    %
 1368:    \def\authorfont{\authorrm \normalbaselineskip = 16pt \normalbaselines}%
 1369:    %
 1370:    % Leave some space at the very top of the page.
 1371:    \vglue\titlepagetopglue
 1372:    %
 1373:    % Now you can print the title using @title.
 1374:    \def\title{\parsearg\titlezzz}%
 1375:    \def\titlezzz##1{\leftline{\titlefont{##1}}
 1376:                     % print a rule at the page bottom also.
 1377:                     \finishedtitlepagefalse
 1378:                     \vskip4pt \hrule height 4pt width \hsize \vskip4pt}%
 1379:    % No rule at page bottom unless we print one at the top with @title.
 1380:    \finishedtitlepagetrue
 1381:    %
 1382:    % Now you can put text using @subtitle.
 1383:    \def\subtitle{\parsearg\subtitlezzz}%
 1384:    \def\subtitlezzz##1{{\subtitlefont \rightline{##1}}}%
 1385:    %
 1386:    % @author should come last, but may come many times.
 1387:    \def\author{\parsearg\authorzzz}%
 1388:    \def\authorzzz##1{\ifseenauthor\else\vskip 0pt plus 1filll\seenauthortrue\fi
 1389:       {\authorfont \leftline{##1}}}%
 1390:    %
 1391:    % Most title ``pages'' are actually two pages long, with space
 1392:    % at the top of the second.  We don't want the ragged left on the second.
 1393:    \let\oldpage = \page
 1394:    \def\page{%
 1395:       \iffinishedtitlepage\else
 1396:          \finishtitlepage
 1397:       \fi
 1398:       \oldpage
 1399:       \let\page = \oldpage
 1400:       \hbox{}}%
 1401: %   \def\page{\oldpage \hbox{}}
 1402: }
 1403: 
 1404: \def\Etitlepage{%
 1405:    \iffinishedtitlepage\else
 1406:       \finishtitlepage
 1407:    \fi
 1408:    % It is important to do the page break before ending the group,
 1409:    % because the headline and footline are only empty inside the group.
 1410:    % If we use the new definition of \page, we always get a blank page
 1411:    % after the title page, which we certainly don't want.
 1412:    \oldpage
 1413:    \endgroup
 1414:    \HEADINGSon
 1415: }
 1416: 
 1417: \def\finishtitlepage{%
 1418:    \vskip4pt \hrule height 2pt width \hsize
 1419:    \vskip\titlepagebottomglue
 1420:    \finishedtitlepagetrue
 1421: }
 1422: 
 1423: %%% Set up page headings and footings.
 1424: 
 1425: \let\thispage=\folio
 1426: 
 1427: \newtoks \evenheadline    % Token sequence for heading line of even pages
 1428: \newtoks \oddheadline     % Token sequence for heading line of odd pages
 1429: \newtoks \evenfootline    % Token sequence for footing line of even pages
 1430: \newtoks \oddfootline     % Token sequence for footing line of odd pages
 1431: 
 1432: % Now make Tex use those variables
 1433: \headline={{\textfonts\rm \ifodd\pageno \the\oddheadline
 1434:                             \else \the\evenheadline \fi}}
 1435: \footline={{\textfonts\rm \ifodd\pageno \the\oddfootline
 1436:                             \else \the\evenfootline \fi}\HEADINGShook}
 1437: \let\HEADINGShook=\relax
 1438: 
 1439: % Commands to set those variables.
 1440: % For example, this is what  @headings on  does
 1441: % @evenheading @thistitle|@thispage|@thischapter
 1442: % @oddheading @thischapter|@thispage|@thistitle
 1443: % @evenfooting @thisfile||
 1444: % @oddfooting ||@thisfile
 1445: 
 1446: \def\evenheading{\parsearg\evenheadingxxx}
 1447: \def\oddheading{\parsearg\oddheadingxxx}
 1448: \def\everyheading{\parsearg\everyheadingxxx}
 1449: 
 1450: \def\evenfooting{\parsearg\evenfootingxxx}
 1451: \def\oddfooting{\parsearg\oddfootingxxx}
 1452: \def\everyfooting{\parsearg\everyfootingxxx}
 1453: 
 1454: {\catcode`\@=0 %
 1455: 
 1456: \gdef\evenheadingxxx #1{\evenheadingyyy #1@|@|@|@|\finish}
 1457: \gdef\evenheadingyyy #1@|#2@|#3@|#4\finish{%
 1458: \global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
 1459: 
 1460: \gdef\oddheadingxxx #1{\oddheadingyyy #1@|@|@|@|\finish}
 1461: \gdef\oddheadingyyy #1@|#2@|#3@|#4\finish{%
 1462: \global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
 1463: 
 1464: \gdef\everyheadingxxx #1{\everyheadingyyy #1@|@|@|@|\finish}
 1465: \gdef\everyheadingyyy #1@|#2@|#3@|#4\finish{%
 1466: \global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}
 1467: \global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
 1468: 
 1469: \gdef\evenfootingxxx #1{\evenfootingyyy #1@|@|@|@|\finish}
 1470: \gdef\evenfootingyyy #1@|#2@|#3@|#4\finish{%
 1471: \global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
 1472: 
 1473: \gdef\oddfootingxxx #1{\oddfootingyyy #1@|@|@|@|\finish}
 1474: \gdef\oddfootingyyy #1@|#2@|#3@|#4\finish{%
 1475: \global\oddfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
 1476: 
 1477: \gdef\everyfootingxxx #1{\everyfootingyyy #1@|@|@|@|\finish}
 1478: \gdef\everyfootingyyy #1@|#2@|#3@|#4\finish{%
 1479: \global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}
 1480: \global\oddfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
 1481: %
 1482: }% unbind the catcode of @.
 1483: 
 1484: % @headings double      turns headings on for double-sided printing.
 1485: % @headings single      turns headings on for single-sided printing.
 1486: % @headings off         turns them off.
 1487: % @headings on          same as @headings double, retained for compatibility.
 1488: % @headings after       turns on double-sided headings after this page.
 1489: % @headings doubleafter turns on double-sided headings after this page.
 1490: % @headings singleafter turns on single-sided headings after this page.
 1491: % By default, they are off at the start of a document,
 1492: % and turned `on' after @end titlepage.
 1493: 
 1494: \def\headings #1 {\csname HEADINGS#1\endcsname}
 1495: 
 1496: \def\HEADINGSoff{
 1497: \global\evenheadline={\hfil} \global\evenfootline={\hfil}
 1498: \global\oddheadline={\hfil} \global\oddfootline={\hfil}}
 1499: \HEADINGSoff
 1500: % When we turn headings on, set the page number to 1.
 1501: % For double-sided printing, put current file name in lower left corner,
 1502: % chapter name on inside top of right hand pages, document
 1503: % title on inside top of left hand pages, and page numbers on outside top
 1504: % edge of all pages.
 1505: \def\HEADINGSdouble{
 1506: \global\pageno=1
 1507: \global\evenfootline={\hfil}
 1508: \global\oddfootline={\hfil}
 1509: \global\evenheadline={\line{\folio\hfil\thistitle}}
 1510: \global\oddheadline={\line{\thischapter\hfil\folio}}
 1511: \global\let\contentsalignmacro = \chapoddpage
 1512: }
 1513: \let\contentsalignmacro = \chappager
 1514: 
 1515: % For single-sided printing, chapter title goes across top left of page,
 1516: % page number on top right.
 1517: \def\HEADINGSsingle{
 1518: \global\pageno=1
 1519: \global\evenfootline={\hfil}
 1520: \global\oddfootline={\hfil}
 1521: \global\evenheadline={\line{\thischapter\hfil\folio}}
 1522: \global\oddheadline={\line{\thischapter\hfil\folio}}
 1523: \global\let\contentsalignmacro = \chappager
 1524: }
 1525: \def\HEADINGSon{\HEADINGSdouble}
 1526: 
 1527: \def\HEADINGSafter{\let\HEADINGShook=\HEADINGSdoublex}
 1528: \let\HEADINGSdoubleafter=\HEADINGSafter
 1529: \def\HEADINGSdoublex{%
 1530: \global\evenfootline={\hfil}
 1531: \global\oddfootline={\hfil}
 1532: \global\evenheadline={\line{\folio\hfil\thistitle}}
 1533: \global\oddheadline={\line{\thischapter\hfil\folio}}
 1534: \global\let\contentsalignmacro = \chapoddpage
 1535: }
 1536: 
 1537: \def\HEADINGSsingleafter{\let\HEADINGShook=\HEADINGSsinglex}
 1538: \def\HEADINGSsinglex{%
 1539: \global\evenfootline={\hfil}
 1540: \global\oddfootline={\hfil}
 1541: \global\evenheadline={\line{\thischapter\hfil\folio}}
 1542: \global\oddheadline={\line{\thischapter\hfil\folio}}
 1543: \global\let\contentsalignmacro = \chappager
 1544: }
 1545: 
 1546: % Subroutines used in generating headings
 1547: % Produces Day Month Year style of output.
 1548: \def\today{\number\day\space
 1549: \ifcase\month\or
 1550: January\or February\or March\or April\or May\or June\or
 1551: July\or August\or September\or October\or November\or December\fi
 1552: \space\number\year}
 1553: 
 1554: % Use this if you want the Month Day, Year style of output.
 1555: %\def\today{\ifcase\month\or
 1556: %January\or February\or March\or April\or May\or June\or
 1557: %July\or August\or September\or October\or November\or December\fi
 1558: %\space\number\day, \number\year}
 1559: 
 1560: % @settitle line...  specifies the title of the document, for headings
 1561: % It generates no output of its own
 1562: 
 1563: \def\thistitle{No Title}
 1564: \def\settitle{\parsearg\settitlezzz}
 1565: \def\settitlezzz #1{\gdef\thistitle{#1}}
 1566: 
 1567: 
 1568: \message{tables,}
 1569: 
 1570: % @tabs -- simple alignment
 1571: 
 1572: % These don't work.  For one thing, \+ is defined as outer.
 1573: % So these macros cannot even be defined.
 1574: 
 1575: %\def\tabs{\parsearg\tabszzz}
 1576: %\def\tabszzz #1{\settabs\+#1\cr}
 1577: %\def\tabline{\parsearg\tablinezzz}
 1578: %\def\tablinezzz #1{\+#1\cr}
 1579: %\def\&{&}
 1580: 
 1581: % Tables -- @table, @ftable, @vtable, @item(x), @kitem(x), @xitem(x).
 1582: 
 1583: % default indentation of table text
 1584: \newdimen\tableindent \tableindent=.8in
 1585: % default indentation of @itemize and @enumerate text
 1586: \newdimen\itemindent  \itemindent=.3in
 1587: % margin between end of table item and start of table text.
 1588: \newdimen\itemmargin  \itemmargin=.1in
 1589: 
 1590: % used internally for \itemindent minus \itemmargin
 1591: \newdimen\itemmax
 1592: 
 1593: % Note @table, @vtable, and @vtable define @item, @itemx, etc., with
 1594: % these defs.
 1595: % They also define \itemindex
 1596: % to index the item name in whatever manner is desired (perhaps none).
 1597: 
 1598: \newif\ifitemxneedsnegativevskip
 1599: 
 1600: \def\itemxpar{\par\ifitemxneedsnegativevskip\nobreak\vskip-\parskip\nobreak\fi}
 1601: 
 1602: \def\internalBitem{\smallbreak \parsearg\itemzzz}
 1603: \def\internalBitemx{\itemxpar \parsearg\itemzzz}
 1604: 
 1605: \def\internalBxitem "#1"{\def\xitemsubtopix{#1} \smallbreak \parsearg\xitemzzz}
 1606: \def\internalBxitemx "#1"{\def\xitemsubtopix{#1} \itemxpar \parsearg\xitemzzz}
 1607: 
 1608: \def\internalBkitem{\smallbreak \parsearg\kitemzzz}
 1609: \def\internalBkitemx{\itemxpar \parsearg\kitemzzz}
 1610: 
 1611: \def\kitemzzz #1{\dosubind {kw}{\code{#1}}{for {\bf \lastfunction}}%
 1612:                  \itemzzz {#1}}
 1613: 
 1614: \def\xitemzzz #1{\dosubind {kw}{\code{#1}}{for {\bf \xitemsubtopic}}%
 1615:                  \itemzzz {#1}}
 1616: 
 1617: \def\itemzzz #1{\begingroup %
 1618:   \advance\hsize by -\rightskip
 1619:   \advance\hsize by -\tableindent
 1620:   \setbox0=\hbox{\itemfont{#1}}%
 1621:   \itemindex{#1}%
 1622:   \nobreak % This prevents a break before @itemx.
 1623:   %
 1624:   % Be sure we are not still in the middle of a paragraph.
 1625:   %{\parskip = 0in
 1626:   %\par
 1627:   %}%
 1628:   %
 1629:   % If the item text does not fit in the space we have, put it on a line
 1630:   % by itself, and do not allow a page break either before or after that
 1631:   % line.  We do not start a paragraph here because then if the next
 1632:   % command is, e.g., @kindex, the whatsit would get put into the
 1633:   % horizontal list on a line by itself, resulting in extra blank space.
 1634:   \ifdim \wd0>\itemmax
 1635:     %
 1636:     % Make this a paragraph so we get the \parskip glue and wrapping,
 1637:     % but leave it ragged-right.
 1638:     \begingroup
 1639:       \advance\leftskip by-\tableindent
 1640:       \advance\hsize by\tableindent
 1641:       \advance\rightskip by0pt plus1fil
 1642:       \leavevmode\unhbox0\par
 1643:     \endgroup
 1644:     %
 1645:     % We're going to be starting a paragraph, but we don't want the
 1646:     % \parskip glue -- logically it's part of the @item we just started.
 1647:     \nobreak \vskip-\parskip
 1648:     %
 1649:     % Stop a page break at the \parskip glue coming up.  Unfortunately
 1650:     % we can't prevent a possible page break at the following
 1651:     % \baselineskip glue.
 1652:     \nobreak
 1653:     \endgroup
 1654:     \itemxneedsnegativevskipfalse
 1655:   \else
 1656:     % The item text fits into the space.  Start a paragraph, so that the
 1657:     % following text (if any) will end up on the same line.  Since that
 1658:     % text will be indented by \tableindent, we make the item text be in
 1659:     % a zero-width box.
 1660:     \noindent
 1661:     \rlap{\hskip -\tableindent\box0}\ignorespaces%
 1662:     \endgroup%
 1663:     \itemxneedsnegativevskiptrue%
 1664:   \fi
 1665: }
 1666: 
 1667: \def\item{\errmessage{@item while not in a table}}
 1668: \def\itemx{\errmessage{@itemx while not in a table}}
 1669: \def\kitem{\errmessage{@kitem while not in a table}}
 1670: \def\kitemx{\errmessage{@kitemx while not in a table}}
 1671: \def\xitem{\errmessage{@xitem while not in a table}}
 1672: \def\xitemx{\errmessage{@xitemx while not in a table}}
 1673: 
 1674: %% Contains a kludge to get @end[description] to work
 1675: \def\description{\tablez{\dontindex}{1}{}{}{}{}}
 1676: 
 1677: \def\table{\begingroup\inENV\obeylines\obeyspaces\tablex}
 1678: {\obeylines\obeyspaces%
 1679: \gdef\tablex #1^^M{%
 1680: \tabley\dontindex#1        \endtabley}}
 1681: 
 1682: \def\ftable{\begingroup\inENV\obeylines\obeyspaces\ftablex}
 1683: {\obeylines\obeyspaces%
 1684: \gdef\ftablex #1^^M{%
 1685: \tabley\fnitemindex#1        \endtabley
 1686: \def\Eftable{\endgraf\afterenvbreak\endgroup}%
 1687: \let\Etable=\relax}}
 1688: 
 1689: \def\vtable{\begingroup\inENV\obeylines\obeyspaces\vtablex}
 1690: {\obeylines\obeyspaces%
 1691: \gdef\vtablex #1^^M{%
 1692: \tabley\vritemindex#1        \endtabley
 1693: \def\Evtable{\endgraf\afterenvbreak\endgroup}%
 1694: \let\Etable=\relax}}
 1695: 
 1696: \def\dontindex #1{}
 1697: \def\fnitemindex #1{\doind {fn}{\code{#1}}}%
 1698: \def\vritemindex #1{\doind {vr}{\code{#1}}}%
 1699: 
 1700: {\obeyspaces %
 1701: \gdef\tabley#1#2 #3 #4 #5 #6 #7\endtabley{\endgroup%
 1702: \tablez{#1}{#2}{#3}{#4}{#5}{#6}}}
 1703: 
 1704: \def\tablez #1#2#3#4#5#6{%
 1705: \aboveenvbreak %
 1706: \begingroup %
 1707: \def\Edescription{\Etable}% Necessary kludge.
 1708: \let\itemindex=#1%
 1709: \ifnum 0#3>0 \advance \leftskip by #3\mil \fi %
 1710: \ifnum 0#4>0 \tableindent=#4\mil \fi %
 1711: \ifnum 0#5>0 \advance \rightskip by #5\mil \fi %
 1712: \def\itemfont{#2}%
 1713: \itemmax=\tableindent %
 1714: \advance \itemmax by -\itemmargin %
 1715: \advance \leftskip by \tableindent %
 1716: \exdentamount=\tableindent
 1717: \parindent = 0pt
 1718: \parskip = \smallskipamount
 1719: \ifdim \parskip=0pt \parskip=2pt \fi%
 1720: \def\Etable{\endgraf\afterenvbreak\endgroup}%
 1721: \let\item = \internalBitem %
 1722: \let\itemx = \internalBitemx %
 1723: \let\kitem = \internalBkitem %
 1724: \let\kitemx = \internalBkitemx %
 1725: \let\xitem = \internalBxitem %
 1726: \let\xitemx = \internalBxitemx %
 1727: }
 1728: 
 1729: % This is the counter used by @enumerate, which is really @itemize
 1730: 
 1731: \newcount \itemno
 1732: 
 1733: \def\itemize{\parsearg\itemizezzz}
 1734: 
 1735: \def\itemizezzz #1{%
 1736:   \begingroup % ended by the @end itemsize
 1737:   \itemizey {#1}{\Eitemize}
 1738: }
 1739: 
 1740: \def\itemizey #1#2{%
 1741: \aboveenvbreak %
 1742: \itemmax=\itemindent %
 1743: \advance \itemmax by -\itemmargin %
 1744: \advance \leftskip by \itemindent %
 1745: \exdentamount=\itemindent
 1746: \parindent = 0pt %
 1747: \parskip = \smallskipamount %
 1748: \ifdim \parskip=0pt \parskip=2pt \fi%
 1749: \def#2{\endgraf\afterenvbreak\endgroup}%
 1750: \def\itemcontents{#1}%
 1751: \let\item=\itemizeitem}
 1752: 
 1753: % Set sfcode to normal for the chars that usually have another value.
 1754: % These are `.?!:;,'
 1755: \def\frenchspacing{\sfcode46=1000 \sfcode63=1000 \sfcode33=1000
 1756:   \sfcode58=1000 \sfcode59=1000 \sfcode44=1000 }
 1757: 
 1758: % \splitoff TOKENS\endmark defines \first to be the first token in
 1759: % TOKENS, and \rest to be the remainder.
 1760: %
 1761: \def\splitoff#1#2\endmark{\def\first{#1}\def\rest{#2}}%
 1762: 
 1763: % Allow an optional argument of an uppercase letter, lowercase letter,
 1764: % or number, to specify the first label in the enumerated list.  No
 1765: % argument is the same as `1'.
 1766: %
 1767: \def\enumerate{\parsearg\enumeratezzz}
 1768: \def\enumeratezzz #1{\enumeratey #1  \endenumeratey}
 1769: \def\enumeratey #1 #2\endenumeratey{%
 1770:   \begingroup % ended by the @end enumerate
 1771:   %
 1772:   % If we were given no argument, pretend we were given `1'.
 1773:   \def\thearg{#1}%
 1774:   \ifx\thearg\empty \def\thearg{1}\fi
 1775:   %
 1776:   % Detect if the argument is a single token.  If so, it might be a
 1777:   % letter.  Otherwise, the only valid thing it can be is a number.
 1778:   % (We will always have one token, because of the test we just made.
 1779:   % This is a good thing, since \splitoff doesn't work given nothing at
 1780:   % all -- the first parameter is undelimited.)
 1781:   \expandafter\splitoff\thearg\endmark
 1782:   \ifx\rest\empty
 1783:     % Only one token in the argument.  It could still be anything.
 1784:     % A ``lowercase letter'' is one whose \lccode is nonzero.
 1785:     % An ``uppercase letter'' is one whose \lccode is both nonzero, and
 1786:     %   not equal to itself.
 1787:     % Otherwise, we assume it's a number.
 1788:     %
 1789:     % We need the \relax at the end of the \ifnum lines to stop TeX from
 1790:     % continuing to look for a <number>.
 1791:     %
 1792:     \ifnum\lccode\expandafter`\thearg=0\relax
 1793:       \numericenumerate % a number (we hope)
 1794:     \else
 1795:       % It's a letter.
 1796:       \ifnum\lccode\expandafter`\thearg=\expandafter`\thearg\relax
 1797:         \lowercaseenumerate % lowercase letter
 1798:       \else
 1799:         \uppercaseenumerate % uppercase letter
 1800:       \fi
 1801:     \fi
 1802:   \else
 1803:     % Multiple tokens in the argument.  We hope it's a number.
 1804:     \numericenumerate
 1805:   \fi
 1806: }
 1807: 
 1808: % An @enumerate whose labels are integers.  The starting integer is
 1809: % given in \thearg.
 1810: %
 1811: \def\numericenumerate{%
 1812:   \itemno = \thearg
 1813:   \startenumeration{\the\itemno}%
 1814: }
 1815: 
 1816: % The starting (lowercase) letter is in \thearg.
 1817: \def\lowercaseenumerate{%
 1818:   \itemno = \expandafter`\thearg
 1819:   \startenumeration{%
 1820:     % Be sure we're not beyond the end of the alphabet.
 1821:     \ifnum\itemno=0
 1822:       \errmessage{No more lowercase letters in @enumerate; get a bigger
 1823:                   alphabet}%
 1824:     \fi
 1825:     \char\lccode\itemno
 1826:   }%
 1827: }
 1828: 
 1829: % The starting (uppercase) letter is in \thearg.
 1830: \def\uppercaseenumerate{%
 1831:   \itemno = \expandafter`\thearg
 1832:   \startenumeration{%
 1833:     % Be sure we're not beyond the end of the alphabet.
 1834:     \ifnum\itemno=0
 1835:       \errmessage{No more uppercase letters in @enumerate; get a bigger
 1836:                   alphabet}
 1837:     \fi
 1838:     \char\uccode\itemno
 1839:   }%
 1840: }
 1841: 
 1842: % Call itemizey, adding a period to the first argument and supplying the
 1843: % common last two arguments.  Also subtract one from the initial value in
 1844: % \itemno, since @item increments \itemno.
 1845: %
 1846: \def\startenumeration#1{%
 1847:   \advance\itemno by -1
 1848:   \itemizey{#1.}\Eenumerate\flushcr
 1849: }
 1850: 
 1851: % @alphaenumerate and @capsenumerate are abbreviations for giving an arg
 1852: % to @enumerate.
 1853: %
 1854: \def\alphaenumerate{\enumerate{a}}
 1855: \def\capsenumerate{\enumerate{A}}
 1856: \def\Ealphaenumerate{\Eenumerate}
 1857: \def\Ecapsenumerate{\Eenumerate}
 1858: 
 1859: % Definition of @item while inside @itemize.
 1860: 
 1861: \def\itemizeitem{%
 1862: \advance\itemno by 1
 1863: {\let\par=\endgraf \smallbreak}%
 1864: \ifhmode \errmessage{\in hmode at itemizeitem}\fi
 1865: {\parskip=0in \hskip 0pt
 1866: \hbox to 0pt{\hss \itemcontents\hskip \itemmargin}%
 1867: \vadjust{\penalty 1200}}%
 1868: \flushcr}
 1869: 
 1870: % @multitable macros
 1871: % Amy Hendrickson, 8/18/94, 3/6/96
 1872: %
 1873: % @multitable ... @end multitable will make as many columns as desired.
 1874: % Contents of each column will wrap at width given in preamble.  Width
 1875: % can be specified either with sample text given in a template line,
 1876: % or in percent of \hsize, the current width of text on page.
 1877: 
 1878: % Table can continue over pages but will only break between lines.
 1879: 
 1880: % To make preamble:
 1881: %
 1882: % Either define widths of columns in terms of percent of \hsize: 
 1883: %   @multitable @columnfractions .25 .3 .45
 1884: %   @item ...
 1885: %
 1886: %   Numbers following @columnfractions are the percent of the total
 1887: %   current hsize to be used for each column. You may use as many
 1888: %   columns as desired.
 1889: 
 1890: 
 1891: % Or use a template:
 1892: %   @multitable {Column 1 template} {Column 2 template} {Column 3 template}
 1893: %   @item ...
 1894: %   using the widest term desired in each column.
 1895: %
 1896: % For those who want to use more than one line's worth of words in
 1897: % the preamble, break the line within one argument and it
 1898: % will parse correctly, i.e.,
 1899: %
 1900: %     @multitable {Column 1 template} {Column 2 template} {Column 3 
 1901: %      template}
 1902: % Not:
 1903: %     @multitable {Column 1 template} {Column 2 template} 
 1904: %      {Column 3 template}
 1905: 
 1906: % Each new table line starts with @item, each subsequent new column 
 1907: % starts with @tab. Empty columns may be produced by supplying @tab's
 1908: % with nothing between them for as many times as empty columns are needed,
 1909: % ie, @tab@tab@tab will produce two empty columns.
 1910: 
 1911: % @item, @tab, @multitable or @end multitable do not need to be on their
 1912: % own lines, but it will not hurt if they are.
 1913: 
 1914: % Sample multitable:
 1915: 
 1916: %   @multitable {Column 1 template} {Column 2 template} {Column 3 template}
 1917: %   @item first col stuff @tab second col stuff @tab third col
 1918: %   @item 
 1919: %   first col stuff 
 1920: %   @tab 
 1921: %   second col stuff 
 1922: %   @tab 
 1923: %   third col 
 1924: %   @item first col stuff @tab second col stuff 
 1925: %   @tab Many paragraphs of text may be used in any column.
 1926: %     
 1927: %         They will wrap at the width determined by the template.
 1928: %   @item@tab@tab This will be in third column.
 1929: %   @end multitable
 1930: 
 1931: % Default dimensions may be reset by user.
 1932: % @multitableparskip is vertical space between paragraphs in table.
 1933: % @multitableparindent is paragraph indent in table.
 1934: % @multitablecolmargin is horizontal space to be left between columns.
 1935: % @multitablelinespace is space to leave between table items, baseline
 1936: %                                                            to baseline.
 1937: %   0pt means it depends on current normal line spacing.
 1938: 
 1939: %%%%
 1940: % Dimensions 
 1941: 
 1942: \newskip\multitableparskip
 1943: \newskip\multitableparindent
 1944: \newdimen\multitablecolspace
 1945: \newskip\multitablelinespace
 1946: \multitableparskip=0pt
 1947: \multitableparindent=6pt
 1948: \multitablecolspace=12pt
 1949: \multitablelinespace=0pt
 1950: 
 1951: %%%%
 1952: % Macros used to set up halign preamble:
 1953: \let\endsetuptable\relax
 1954: \def\xendsetuptable{\endsetuptable}
 1955: \let\columnfractions\relax
 1956: \def\xcolumnfractions{\columnfractions}
 1957: \newif\ifsetpercent
 1958: 
 1959: %% 2/1/96, to allow fractions to be given with more than one digit.
 1960: \def\pickupwholefraction#1 {\global\advance\colcount by1 %
 1961: \expandafter\xdef\csname col\the\colcount\endcsname{.#1\hsize}%
 1962: \setuptable}
 1963: 
 1964: \newcount\colcount
 1965: \def\setuptable#1{\def\firstarg{#1}%
 1966: \ifx\firstarg\xendsetuptable\let\go\relax%
 1967: \else
 1968:   \ifx\firstarg\xcolumnfractions\global\setpercenttrue%
 1969:   \else
 1970:     \ifsetpercent
 1971:        \let\go\pickupwholefraction   % In this case arg of setuptable
 1972:                                      % is the decimal point before the
 1973:                                      % number given in percent of hsize.
 1974:                                      % We don't need this so we don't use it.
 1975:     \else
 1976:        \global\advance\colcount by1
 1977:        \setbox0=\hbox{#1 }% Add a normal word space as a separator;
 1978:                           % typically that is always in the input, anyway.
 1979:        \expandafter\xdef\csname col\the\colcount\endcsname{\the\wd0}%
 1980:     \fi%
 1981:   \fi%
 1982: \ifx\go\pickupwholefraction\else\let\go\setuptable\fi%
 1983: \fi\go}
 1984: 
 1985: %%%%
 1986: % multitable syntax
 1987: \def\tab{&\hskip1sp\relax} % 2/2/96
 1988:                            % tiny skip here makes sure this column space is
 1989:                            % maintained, even if it is never used.
 1990: 
 1991: 
 1992: %%%%
 1993: % @multitable ... @end multitable definitions:
 1994: 
 1995: \def\multitable{\parsearg\dotable}
 1996: 
 1997: \def\dotable#1{\bgroup
 1998: \let\item\cr
 1999: \tolerance=9500
 2000: \hbadness=9500
 2001: \setmultitablespacing
 2002: \parskip=\multitableparskip
 2003: \parindent=\multitableparindent
 2004: \overfullrule=0pt
 2005: \global\colcount=0\relax%
 2006: \def\Emultitable{\global\setpercentfalse\global\everycr{}\cr\egroup\egroup}%
 2007:  % To parse everything between @multitable and @item :
 2008: \setuptable#1 \endsetuptable
 2009:  % Need to reset this to 0 after \setuptable.
 2010: \global\colcount=0\relax% 
 2011:  %
 2012:  % This preamble sets up a generic column definition, which will
 2013:  % be used as many times as user calls for columns.
 2014:  % \vtop will set a single line and will also let text wrap and 
 2015:  % continue for many paragraphs if desired.
 2016: \halign\bgroup&\global\advance\colcount by 1\relax%
 2017: \multistrut\vtop{\hsize=\expandafter\csname col\the\colcount\endcsname
 2018:  % In order to keep entries from bumping into each other
 2019:  % we will add a \leftskip of \multitablecolspace to all columns after
 2020:  % the first one.
 2021:  %  If a template has been used, we will add \multitablecolspace 
 2022:  % to the width of each template entry.
 2023:  %  If user has set preamble in terms of percent of \hsize
 2024:  % we will use that dimension as the width of the column, and
 2025:  % the \leftskip will keep entries from bumping into each other.
 2026:  % Table will start at left margin and final column will justify at
 2027:  % right margin.
 2028: \ifnum\colcount=1
 2029: \else
 2030:   \ifsetpercent
 2031:   \else
 2032:    % If user has <not> set preamble in terms of percent of \hsize
 2033:    % we will advance \hsize by \multitablecolspace 
 2034:   \advance\hsize by \multitablecolspace
 2035:   \fi
 2036:  % In either case we will make \leftskip=\multitablecolspace:
 2037: \leftskip=\multitablecolspace
 2038: \fi
 2039: \noindent##\multistrut}\cr%
 2040:  % \everycr will reset column counter, \colcount, at the end of
 2041:  % each line. Every column  entry will cause \colcount to advance by one. 
 2042:  % The table preamble
 2043:  % looks at the current \colcount to find the correct column width.
 2044: \global\everycr{\noalign{%
 2045: \filbreak%% keeps underfull box messages off when table breaks over pages.
 2046: \global\colcount=0\relax}}
 2047: }
 2048: 
 2049: \def\setmultitablespacing{% test to see if user has set \multitablelinespace.
 2050: % If so, do nothing. If not, give it an appropriate dimension based on
 2051: % current baselineskip.
 2052: \ifdim\multitablelinespace=0pt
 2053: %% strut to put in table in case some entry doesn't have descenders,
 2054: %% to keep lines equally spaced
 2055: \let\multistrut = \strut
 2056: %% Test to see if parskip is larger than space between lines of
 2057: %% table. If not, do nothing. 
 2058: %%        If so, set to same dimension as multitablelinespace.
 2059: \else
 2060: \gdef\multistrut{\vrule height\multitablelinespace depth\dp0
 2061: width0pt\relax} \fi
 2062: \ifdim\multitableparskip>\multitablelinespace
 2063: \global\multitableparskip=\multitablelinespace
 2064: \global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
 2065:                                       %% than skip between lines in the table.
 2066: \fi%
 2067: \ifdim\multitableparskip=0pt
 2068: \global\multitableparskip=\multitablelinespace
 2069: \global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
 2070:                                       %% than skip between lines in the table.
 2071: \fi}
 2072: 
 2073: 
 2074: \message{indexing,}
 2075: % Index generation facilities
 2076: 
 2077: % Define \newwrite to be identical to plain tex's \newwrite
 2078: % except not \outer, so it can be used within \newindex.
 2079: {\catcode`\@=11
 2080: \gdef\newwrite{\alloc@7\write\chardef\sixt@@n}}
 2081: 
 2082: % \newindex {foo} defines an index named foo.
 2083: % It automatically defines \fooindex such that
 2084: % \fooindex ...rest of line... puts an entry in the index foo.
 2085: % It also defines \fooindfile to be the number of the output channel for
 2086: % the file that accumulates this index.  The file's extension is foo.
 2087: % The name of an index should be no more than 2 characters long
 2088: % for the sake of vms.
 2089: 
 2090: \def\newindex #1{
 2091: \expandafter\newwrite \csname#1indfile\endcsname% Define number for output file
 2092: \openout \csname#1indfile\endcsname \jobname.#1 % Open the file
 2093: \expandafter\xdef\csname#1index\endcsname{%     % Define \xxxindex
 2094: \noexpand\doindex {#1}}
 2095: }
 2096: 
 2097: % @defindex foo  ==  \newindex{foo}
 2098: 
 2099: \def\defindex{\parsearg\newindex}
 2100: 
 2101: % Define @defcodeindex, like @defindex except put all entries in @code.
 2102: 
 2103: \def\newcodeindex #1{
 2104: \expandafter\newwrite \csname#1indfile\endcsname% Define number for output file
 2105: \openout \csname#1indfile\endcsname \jobname.#1 % Open the file
 2106: \expandafter\xdef\csname#1index\endcsname{%     % Define \xxxindex
 2107: \noexpand\docodeindex {#1}}
 2108: }
 2109: 
 2110: \def\defcodeindex{\parsearg\newcodeindex}
 2111: 
 2112: % @synindex foo bar    makes index foo feed into index bar.
 2113: % Do this instead of @defindex foo if you don't want it as a separate index.
 2114: \def\synindex #1 #2 {%
 2115: \expandafter\let\expandafter\synindexfoo\expandafter=\csname#2indfile\endcsname
 2116: \expandafter\let\csname#1indfile\endcsname=\synindexfoo
 2117: \expandafter\xdef\csname#1index\endcsname{%     % Define \xxxindex
 2118: \noexpand\doindex {#2}}%
 2119: }
 2120: 
 2121: % @syncodeindex foo bar   similar, but put all entries made for index foo
 2122: % inside @code.
 2123: \def\syncodeindex #1 #2 {%
 2124: \expandafter\let\expandafter\synindexfoo\expandafter=\csname#2indfile\endcsname
 2125: \expandafter\let\csname#1indfile\endcsname=\synindexfoo
 2126: \expandafter\xdef\csname#1index\endcsname{%     % Define \xxxindex
 2127: \noexpand\docodeindex {#2}}%
 2128: }
 2129: 
 2130: % Define \doindex, the driver for all \fooindex macros.
 2131: % Argument #1 is generated by the calling \fooindex macro,
 2132: %  and it is "foo", the name of the index.
 2133: 
 2134: % \doindex just uses \parsearg; it calls \doind for the actual work.
 2135: % This is because \doind is more useful to call from other macros.
 2136: 
 2137: % There is also \dosubind {index}{topic}{subtopic}
 2138: % which makes an entry in a two-level index such as the operation index.
 2139: 
 2140: \def\doindex#1{\edef\indexname{#1}\parsearg\singleindexer}
 2141: \def\singleindexer #1{\doind{\indexname}{#1}}
 2142: 
 2143: % like the previous two, but they put @code around the argument.
 2144: \def\docodeindex#1{\edef\indexname{#1}\parsearg\singlecodeindexer}
 2145: \def\singlecodeindexer #1{\doind{\indexname}{\code{#1}}}
 2146: 
 2147: \def\indexdummies{%
 2148: % Take care of the plain tex accent commands.
 2149: \def\"{\realbackslash "}%
 2150: \def\`{\realbackslash `}%
 2151: \def\'{\realbackslash '}%
 2152: \def\^{\realbackslash ^}%
 2153: \def\~{\realbackslash ~}%
 2154: \def\={\realbackslash =}%
 2155: \def\b{\realbackslash b}%
 2156: \def\c{\realbackslash c}%
 2157: \def\d{\realbackslash d}%
 2158: \def\u{\realbackslash u}%
 2159: \def\v{\realbackslash v}%
 2160: \def\H{\realbackslash H}%
 2161: % Take care of the plain tex special European modified letters.
 2162: \def\oe{\realbackslash oe}%
 2163: \def\ae{\realbackslash ae}%
 2164: \def\aa{\realbackslash aa}%
 2165: \def\OE{\realbackslash OE}%
 2166: \def\AE{\realbackslash AE}%
 2167: \def\AA{\realbackslash AA}%
 2168: \def\o{\realbackslash o}%
 2169: \def\O{\realbackslash O}%
 2170: \def\l{\realbackslash l}%
 2171: \def\L{\realbackslash L}%
 2172: \def\ss{\realbackslash ss}%
 2173: % Take care of texinfo commands likely to appear in an index entry.
 2174: % (Must be a way to avoid doing expansion at all, and thus not have to
 2175: % laboriously list every single command here.)
 2176: \def\@{@}% will be @@ when we switch to @ as escape char.
 2177: %\let\{ = \lbracecmd
 2178: %\let\} = \rbracecmd
 2179: \def\_{{\realbackslash _}}%
 2180: \def\w{\realbackslash w }%
 2181: \def\bf{\realbackslash bf }%
 2182: %\def\rm{\realbackslash rm }%
 2183: \def\sl{\realbackslash sl }%
 2184: \def\sf{\realbackslash sf}%
 2185: \def\tt{\realbackslash tt}%
 2186: \def\gtr{\realbackslash gtr}%
 2187: \def\less{\realbackslash less}%
 2188: \def\hat{\realbackslash hat}%
 2189: %\def\char{\realbackslash char}%
 2190: \def\TeX{\realbackslash TeX}%
 2191: \def\dots{\realbackslash dots }%
 2192: \def\copyright{\realbackslash copyright }%
 2193: \def\tclose##1{\realbackslash tclose {##1}}%
 2194: \def\code##1{\realbackslash code {##1}}%
 2195: \def\dotless##1{\realbackslash dotless {##1}}%
 2196: \def\samp##1{\realbackslash samp {##1}}%
 2197: \def\,##1{\realbackslash ,{##1}}%
 2198: \def\t##1{\realbackslash t {##1}}%
 2199: \def\r##1{\realbackslash r {##1}}%
 2200: \def\i##1{\realbackslash i {##1}}%
 2201: \def\b##1{\realbackslash b {##1}}%
 2202: \def\cite##1{\realbackslash cite {##1}}%
 2203: \def\key##1{\realbackslash key {##1}}%
 2204: \def\file##1{\realbackslash file {##1}}%
 2205: \def\var##1{\realbackslash var {##1}}%
 2206: \def\kbd##1{\realbackslash kbd {##1}}%
 2207: \def\dfn##1{\realbackslash dfn {##1}}%
 2208: \def\emph##1{\realbackslash emph {##1}}%
 2209: \unsepspaces
 2210: }
 2211: 
 2212: % If an index command is used in an @example environment, any spaces
 2213: % therein should become regular spaces in the raw index file, not the
 2214: % expansion of \tie (\\leavevmode \penalty \@M \ ).
 2215: {\obeyspaces
 2216:  \gdef\unsepspaces{\obeyspaces\let =\space}}
 2217: 
 2218: % \indexnofonts no-ops all font-change commands.
 2219: % This is used when outputting the strings to sort the index by.
 2220: \def\indexdummyfont#1{#1}
 2221: \def\indexdummytex{TeX}
 2222: \def\indexdummydots{...}
 2223: 
 2224: \def\indexnofonts{%
 2225: % Just ignore accents.
 2226: \let\,=\indexdummyfont
 2227: \let\"=\indexdummyfont
 2228: \let\`=\indexdummyfont
 2229: \let\'=\indexdummyfont
 2230: \let\^=\indexdummyfont
 2231: \let\~=\indexdummyfont
 2232: \let\==\indexdummyfont
 2233: \let\b=\indexdummyfont
 2234: \let\c=\indexdummyfont
 2235: \let\d=\indexdummyfont
 2236: \let\u=\indexdummyfont
 2237: \let\v=\indexdummyfont
 2238: \let\H=\indexdummyfont
 2239: \let\dotless=\indexdummyfont
 2240: % Take care of the plain tex special European modified letters.
 2241: \def\oe{oe}%
 2242: \def\ae{ae}%
 2243: \def\aa{aa}%
 2244: \def\OE{OE}%
 2245: \def\AE{AE}%
 2246: \def\AA{AA}%
 2247: \def\o{o}%
 2248: \def\O{O}%
 2249: \def\l{l}%
 2250: \def\L{L}%
 2251: \def\ss{ss}%
 2252: \let\w=\indexdummyfont
 2253: \let\t=\indexdummyfont
 2254: \let\r=\indexdummyfont
 2255: \let\i=\indexdummyfont
 2256: \let\b=\indexdummyfont
 2257: \let\emph=\indexdummyfont
 2258: \let\strong=\indexdummyfont
 2259: \let\cite=\indexdummyfont
 2260: \let\sc=\indexdummyfont
 2261: %Don't no-op \tt, since it isn't a user-level command
 2262: % and is used in the definitions of the active chars like <, >, |...
 2263: %\let\tt=\indexdummyfont
 2264: \let\tclose=\indexdummyfont
 2265: \let\code=\indexdummyfont
 2266: \let\file=\indexdummyfont
 2267: \let\samp=\indexdummyfont
 2268: \let\kbd=\indexdummyfont
 2269: \let\key=\indexdummyfont
 2270: \let\var=\indexdummyfont
 2271: \let\TeX=\indexdummytex
 2272: \let\dots=\indexdummydots
 2273: \def\@{@}%
 2274: }
 2275: 
 2276: % To define \realbackslash, we must make \ not be an escape.
 2277: % We must first make another character (@) an escape
 2278: % so we do not become unable to do a definition.
 2279: 
 2280: {\catcode`\@=0 \catcode`\\=\other
 2281: @gdef@realbackslash{\}}
 2282: 
 2283: \let\indexbackslash=0  %overridden during \printindex.
 2284: 
 2285: \let\SETmarginindex=\relax %initialize!
 2286: % workhorse for all \fooindexes
 2287: % #1 is name of index, #2 is stuff to put there
 2288: \def\doind #1#2{%
 2289:   % Put the index entry in the margin if desired.
 2290:   \ifx\SETmarginindex\relax\else
 2291:     \insert\margin{\hbox{\vrule height8pt depth3pt width0pt #2}}%
 2292:   \fi
 2293:   {%
 2294:     \count255=\lastpenalty
 2295:     {%
 2296:       \indexdummies % Must do this here, since \bf, etc expand at this stage
 2297:       \escapechar=`\\
 2298:       {%
 2299:         \let\folio=0 % We will expand all macros now EXCEPT \folio.
 2300:         \def\rawbackslashxx{\indexbackslash}% \indexbackslash isn't defined now
 2301:         % so it will be output as is; and it will print as backslash.
 2302:         %
 2303:         % First process the index-string with all font commands turned off
 2304:         % to get the string to sort by.
 2305:         {\indexnofonts \xdef\indexsorttmp{#2}}%
 2306:         %
 2307:         % Now produce the complete index entry, with both the sort key and the
 2308:         % original text, including any font commands.
 2309:         \toks0 = {#2}%
 2310:         \edef\temp{%
 2311:           \write\csname#1indfile\endcsname{%
 2312:             \realbackslash entry{\indexsorttmp}{\folio}{\the\toks0}}%
 2313:         }%
 2314:         \temp
 2315:       }%
 2316:     }%
 2317:     \penalty\count255
 2318:   }%
 2319: }
 2320: 
 2321: \def\dosubind #1#2#3{%
 2322: {\count10=\lastpenalty %
 2323: {\indexdummies % Must do this here, since \bf, etc expand at this stage
 2324: \escapechar=`\\%
 2325: {\let\folio=0%
 2326: \def\rawbackslashxx{\indexbackslash}%
 2327: %
 2328: % Now process the index-string once, with all font commands turned off,
 2329: % to get the string to sort the index by.
 2330: {\indexnofonts
 2331: \xdef\temp1{#2 #3}%
 2332: }%
 2333: % Now produce the complete index entry.  We process the index-string again,
 2334: % this time with font commands expanded, to get what to print in the index.
 2335: \edef\temp{%
 2336: \write \csname#1indfile\endcsname{%
 2337: \realbackslash entry {\temp1}{\folio}{#2}{#3}}}%
 2338: \temp }%
 2339: }\penalty\count10}}
 2340: 
 2341: % The index entry written in the file actually looks like
 2342: %  \entry {sortstring}{page}{topic}
 2343: % or
 2344: %  \entry {sortstring}{page}{topic}{subtopic}
 2345: % The texindex program reads in these files and writes files
 2346: % containing these kinds of lines:
 2347: %  \initial {c}
 2348: %     before the first topic whose initial is c
 2349: %  \entry {topic}{pagelist}
 2350: %     for a topic that is used without subtopics
 2351: %  \primary {topic}
 2352: %     for the beginning of a topic that is used with subtopics
 2353: %  \secondary {subtopic}{pagelist}
 2354: %     for each subtopic.
 2355: 
 2356: % Define the user-accessible indexing commands
 2357: % @findex, @vindex, @kindex, @cindex.
 2358: 
 2359: \def\findex {\fnindex}
 2360: \def\kindex {\kyindex}
 2361: \def\cindex {\cpindex}
 2362: \def\vindex {\vrindex}
 2363: \def\tindex {\tpindex}
 2364: \def\pindex {\pgindex}
 2365: 
 2366: \def\cindexsub {\begingroup\obeylines\cindexsub}
 2367: {\obeylines %
 2368: \gdef\cindexsub "#1" #2^^M{\endgroup %
 2369: \dosubind{cp}{#2}{#1}}}
 2370: 
 2371: % Define the macros used in formatting output of the sorted index material.
 2372: 
 2373: % This is what you call to cause a particular index to get printed.
 2374: % Write
 2375: % @unnumbered Function Index
 2376: % @printindex fn
 2377: 
 2378: \def\printindex{\parsearg\doprintindex}
 2379: 
 2380: \def\doprintindex#1{\begingroup
 2381:   \dobreak \chapheadingskip{10000}%
 2382:   %
 2383:   \indexfonts \rm
 2384:   \tolerance = 9500
 2385:   \indexbreaks
 2386:   \def\indexbackslash{\rawbackslashxx}%
 2387:   % Index files are almost Texinfo source, but we use \ as the escape
 2388:   % character.  It would be better to use @, but that's too big a change
 2389:   % to make right now.
 2390:   \catcode`\\ = 0
 2391:   \catcode`\@ = 11
 2392:   \escapechar = `\\
 2393:   \begindoublecolumns
 2394:   %
 2395:   % See if the index file exists and is nonempty.
 2396:   \openin 1 \jobname.#1s
 2397:   \ifeof 1
 2398:     % \enddoublecolumns gets confused if there is no text in the index,
 2399:     % and it loses the chapter title and the aux file entries for the
 2400:     % index.  The easiest way to prevent this problem is to make sure
 2401:     % there is some text.
 2402:     (Index is nonexistent)
 2403:   \else
 2404:     %
 2405:     % If the index file exists but is empty, then \openin leaves \ifeof
 2406:     % false.  We have to make TeX try to read something from the file, so
 2407:     % it can discover if there is anything in it.
 2408:     \read 1 to \temp
 2409:     \ifeof 1
 2410:       (Index is empty)
 2411:     \else
 2412:       \input \jobname.#1s
 2413:     \fi
 2414:   \fi
 2415:   \closein 1
 2416:   \enddoublecolumns
 2417: \endgroup}
 2418: 
 2419: % These macros are used by the sorted index file itself.
 2420: % Change them to control the appearance of the index.
 2421: 
 2422: % Same as \bigskipamount except no shrink.
 2423: % \balancecolumns gets confused if there is any shrink.
 2424: \newskip\initialskipamount \initialskipamount 12pt plus4pt
 2425: 
 2426: \def\initial #1{%
 2427: {\let\tentt=\sectt \let\tt=\sectt \let\sf=\sectt
 2428: \ifdim\lastskip<\initialskipamount
 2429: \removelastskip \penalty-200 \vskip \initialskipamount\fi
 2430: \line{\secbf#1\hfill}\kern 2pt\penalty10000}}
 2431: 
 2432: % This typesets a paragraph consisting of #1, dot leaders, and then #2
 2433: % flush to the right margin.  It is used for index and table of contents
 2434: % entries.  The paragraph is indented by \leftskip.
 2435: %
 2436: \def\entry #1#2{\begingroup
 2437:   %
 2438:   % Start a new paragraph if necessary, so our assignments below can't
 2439:   % affect previous text.
 2440:   \par
 2441:   %
 2442:   % Do not fill out the last line with white space.
 2443:   \parfillskip = 0in
 2444:   %
 2445:   % No extra space above this paragraph.
 2446:   \parskip = 0in
 2447:   %
 2448:   % Do not prefer a separate line ending with a hyphen to fewer lines.
 2449:   \finalhyphendemerits = 0
 2450:   %
 2451:   % \hangindent is only relevant when the entry text and page number
 2452:   % don't both fit on one line.  In that case, bob suggests starting the
 2453:   % dots pretty far over on the line.  Unfortunately, a large
 2454:   % indentation looks wrong when the entry text itself is broken across
 2455:   % lines.  So we use a small indentation and put up with long leaders.
 2456:   %
 2457:   % \hangafter is reset to 1 (which is the value we want) at the start
 2458:   % of each paragraph, so we need not do anything with that.
 2459:   \hangindent=2em
 2460:   %
 2461:   % When the entry text needs to be broken, just fill out the first line
 2462:   % with blank space.
 2463:   \rightskip = 0pt plus1fil
 2464:   %
 2465:   % Start a ``paragraph'' for the index entry so the line breaking
 2466:   % parameters we've set above will have an effect.
 2467:   \noindent
 2468:   %
 2469:   % Insert the text of the index entry.  TeX will do line-breaking on it.
 2470:   #1%
 2471:   % The following is kludged to not output a line of dots in the index if
 2472:   % there are no page numbers.  The next person who breaks this will be
 2473:   % cursed by a Unix daemon.
 2474:   \def\tempa{{\rm }}%
 2475:   \def\tempb{#2}%
 2476:   \edef\tempc{\tempa}%
 2477:   \edef\tempd{\tempb}%
 2478:   \ifx\tempc\tempd\ \else%
 2479:     %
 2480:     % If we must, put the page number on a line of its own, and fill out
 2481:     % this line with blank space.  (The \hfil is overwhelmed with the
 2482:     % fill leaders glue in \indexdotfill if the page number does fit.)
 2483:     \hfil\penalty50
 2484:     \null\nobreak\indexdotfill % Have leaders before the page number.
 2485:     %
 2486:     % The `\ ' here is removed by the implicit \unskip that TeX does as
 2487:     % part of (the primitive) \par.  Without it, a spurious underfull
 2488:     % \hbox ensues.
 2489:     \ #2% The page number ends the paragraph.
 2490:   \fi%
 2491:   \par
 2492: \endgroup}
 2493: 
 2494: % Like \dotfill except takes at least 1 em.
 2495: \def\indexdotfill{\cleaders
 2496:   \hbox{$\mathsurround=0pt \mkern1.5mu ${\it .}$ \mkern1.5mu$}\hskip 1em plus 1fill}
 2497: 
 2498: \def\primary #1{\line{#1\hfil}}
 2499: 
 2500: \newskip\secondaryindent \secondaryindent=0.5cm
 2501: 
 2502: \def\secondary #1#2{
 2503: {\parfillskip=0in \parskip=0in
 2504: \hangindent =1in \hangafter=1
 2505: \noindent\hskip\secondaryindent\hbox{#1}\indexdotfill #2\par
 2506: }}
 2507: 
 2508: % Define two-column mode, which we use to typeset indexes.
 2509: % Adapted from the TeXbook, page 416, which is to say,
 2510: % the manmac.tex format used to print the TeXbook itself.
 2511: \catcode`\@=11
 2512: 
 2513: \newbox\partialpage
 2514: \newdimen\doublecolumnhsize
 2515: 
 2516: \def\begindoublecolumns{\begingroup % ended by \enddoublecolumns
 2517:   % Grab any single-column material above us.
 2518:   \output = {\global\setbox\partialpage
 2519:     =\vbox{\unvbox255\kern -\topskip \kern \baselineskip}}%
 2520:   \eject
 2521:   %
 2522:   % Now switch to the double-column output routine.
 2523:   \output={\doublecolumnout}%
 2524:   %
 2525:   % Change the page size parameters.  We could do this once outside this
 2526:   % routine, in each of @smallbook, @afourpaper, and the default 8.5x11
 2527:   % format, but then we repeat the same computation.  Repeating a couple
 2528:   % of assignments once per index is clearly meaningless for the
 2529:   % execution time, so we may as well do it once.
 2530:   %
 2531:   % First we halve the line length, less a little for the gutter between
 2532:   % the columns.  We compute the gutter based on the line length, so it
 2533:   % changes automatically with the paper format.  The magic constant
 2534:   % below is chosen so that the gutter has the same value (well, +- <
 2535:   % 1pt) as it did when we hard-coded it.
 2536:   %
 2537:   % We put the result in a separate register, \doublecolumhsize, so we
 2538:   % can restore it in \pagesofar, after \hsize itself has (potentially)
 2539:   % been clobbered.
 2540:   %
 2541:   \doublecolumnhsize = \hsize
 2542:     \advance\doublecolumnhsize by -.04154\hsize
 2543:     \divide\doublecolumnhsize by 2
 2544:   \hsize = \doublecolumnhsize
 2545:   %
 2546:   % Double the \vsize as well.  (We don't need a separate register here,
 2547:   % since nobody clobbers \vsize.)
 2548:   \vsize = 2\vsize
 2549: }
 2550: \def\doublecolumnout{%
 2551:   \splittopskip=\topskip \splitmaxdepth=\maxdepth
 2552:   % Get the available space for the double columns -- the normal
 2553:   % (undoubled) page height minus any material left over from the
 2554:   % previous page.
 2555:   \dimen@=\pageheight \advance\dimen@ by-\ht\partialpage
 2556:   % box0 will be the left-hand column, box1 the right.
 2557:   \setbox0=\vsplit255 to\dimen@ \setbox2=\vsplit255 to\dimen@
 2558:   \onepageout\pagesofar
 2559:   \unvbox255 \penalty\outputpenalty
 2560: }
 2561: \def\pagesofar{%
 2562:   % The contents of the output page -- any previous material,
 2563:   % followed by the two boxes we just split.
 2564:   \unvbox\partialpage
 2565:   \hsize = \doublecolumnhsize
 2566:   \wd0=\hsize \wd2=\hsize \hbox to\pagewidth{\box0\hfil\box2}%
 2567: }
 2568: \def\enddoublecolumns{%
 2569:   \output={\balancecolumns}\eject % split what we have
 2570:   \endgroup
 2571:   % Back to normal single-column typesetting, but take account of the
 2572:   % fact that we just accumulated some stuff on the output page.
 2573:   \pagegoal=\vsize 
 2574: }
 2575: \def\balancecolumns{%
 2576:   % Called on the last page of the double column material.
 2577:   \setbox0=\vbox{\unvbox255}%
 2578:   \dimen@ = \ht0
 2579:   \advance\dimen@ by \topskip
 2580:   \advance\dimen@ by-\baselineskip
 2581:   \divide\dimen@ by 2
 2582:   \splittopskip = \topskip
 2583:   % Loop until we get a decent breakpoint.
 2584:   {\vbadness=10000 \loop \global\setbox3=\copy0
 2585:     \global\setbox1=\vsplit3 to\dimen@
 2586:     \ifdim\ht3>\dimen@ \global\advance\dimen@ by1pt \repeat}%
 2587:   \setbox0=\vbox to\dimen@{\unvbox1}%
 2588:   \setbox2=\vbox to\dimen@{\unvbox3}%
 2589:   \pagesofar
 2590: }
 2591: \catcode `\@=\other
 2592: 
 2593: 
 2594: \message{sectioning,}
 2595: % Define chapters, sections, etc.
 2596: 
 2597: \newcount \chapno
 2598: \newcount \secno        \secno=0
 2599: \newcount \subsecno     \subsecno=0
 2600: \newcount \subsubsecno  \subsubsecno=0
 2601: 
 2602: % This counter is funny since it counts through charcodes of letters A, B, ...
 2603: \newcount \appendixno  \appendixno = `\@
 2604: \def\appendixletter{\char\the\appendixno}
 2605: 
 2606: \newwrite \contentsfile
 2607: % This is called from \setfilename.
 2608: \def\opencontents{\openout \contentsfile = \jobname.toc}
 2609: 
 2610: % Each @chapter defines this as the name of the chapter.
 2611: % page headings and footings can use it.  @section does likewise
 2612: 
 2613: \def\thischapter{} \def\thissection{}
 2614: \def\seccheck#1{\if \pageno<0 %
 2615: \errmessage{@#1 not allowed after generating table of contents}\fi
 2616: %
 2617: }
 2618: 
 2619: \def\chapternofonts{%
 2620: \let\rawbackslash=\relax%
 2621: \let\frenchspacing=\relax%
 2622: \def\result{\realbackslash result}
 2623: \def\equiv{\realbackslash equiv}
 2624: \def\expansion{\realbackslash expansion}
 2625: \def\print{\realbackslash print}
 2626: \def\TeX{\realbackslash TeX}
 2627: \def\dots{\realbackslash dots}
 2628: \def\copyright{\realbackslash copyright}
 2629: \def\tt{\realbackslash tt}
 2630: \def\bf{\realbackslash bf }
 2631: \def\w{\realbackslash w}
 2632: \def\less{\realbackslash less}
 2633: \def\gtr{\realbackslash gtr}
 2634: \def\hat{\realbackslash hat}
 2635: \def\char{\realbackslash char}
 2636: \def\tclose##1{\realbackslash tclose {##1}}
 2637: \def\code##1{\realbackslash code {##1}}
 2638: \def\samp##1{\realbackslash samp {##1}}
 2639: \def\r##1{\realbackslash r {##1}}
 2640: \def\b##1{\realbackslash b {##1}}
 2641: \def\key##1{\realbackslash key {##1}}
 2642: \def\file##1{\realbackslash file {##1}}
 2643: \def\kbd##1{\realbackslash kbd {##1}}
 2644: % These are redefined because @smartitalic wouldn't work inside xdef.
 2645: \def\i##1{\realbackslash i {##1}}
 2646: \def\cite##1{\realbackslash cite {##1}}
 2647: \def\var##1{\realbackslash var {##1}}
 2648: \def\emph##1{\realbackslash emph {##1}}
 2649: \def\dfn##1{\realbackslash dfn {##1}}
 2650: }
 2651: 
 2652: \newcount\absseclevel % used to calculate proper heading level
 2653: \newcount\secbase\secbase=0 % @raise/lowersections modify this count
 2654: 
 2655: % @raisesections: treat @section as chapter, @subsection as section, etc.
 2656: \def\raisesections{\global\advance\secbase by -1}
 2657: \let\up=\raisesections % original BFox name
 2658: 
 2659: % @lowersections: treat @chapter as section, @section as subsection, etc.
 2660: \def\lowersections{\global\advance\secbase by 1}
 2661: \let\down=\lowersections % original BFox name
 2662: 
 2663: % Choose a numbered-heading macro
 2664: % #1 is heading level if unmodified by @raisesections or @lowersections
 2665: % #2 is text for heading
 2666: \def\numhead#1#2{\absseclevel=\secbase\advance\absseclevel by #1
 2667: \ifcase\absseclevel
 2668:   \chapterzzz{#2}
 2669: \or
 2670:   \seczzz{#2}
 2671: \or
 2672:   \numberedsubseczzz{#2}
 2673: \or
 2674:   \numberedsubsubseczzz{#2}
 2675: \else
 2676:   \ifnum \absseclevel<0
 2677:     \chapterzzz{#2}
 2678:   \else
 2679:     \numberedsubsubseczzz{#2}
 2680:   \fi
 2681: \fi
 2682: }
 2683: 
 2684: % like \numhead, but chooses appendix heading levels
 2685: \def\apphead#1#2{\absseclevel=\secbase\advance\absseclevel by #1
 2686: \ifcase\absseclevel
 2687:   \appendixzzz{#2}
 2688: \or
 2689:   \appendixsectionzzz{#2}
 2690: \or
 2691:   \appendixsubseczzz{#2}
 2692: \or
 2693:   \appendixsubsubseczzz{#2}
 2694: \else
 2695:   \ifnum \absseclevel<0
 2696:     \appendixzzz{#2}
 2697:   \else
 2698:     \appendixsubsubseczzz{#2}
 2699:   \fi
 2700: \fi
 2701: }
 2702: 
 2703: % like \numhead, but chooses numberless heading levels
 2704: \def\unnmhead#1#2{\absseclevel=\secbase\advance\absseclevel by #1
 2705: \ifcase\absseclevel
 2706:   \unnumberedzzz{#2}
 2707: \or
 2708:   \unnumberedseczzz{#2}
 2709: \or
 2710:   \unnumberedsubseczzz{#2}
 2711: \or
 2712:   \unnumberedsubsubseczzz{#2}
 2713: \else
 2714:   \ifnum \absseclevel<0
 2715:     \unnumberedzzz{#2}
 2716:   \else
 2717:     \unnumberedsubsubseczzz{#2}
 2718:   \fi
 2719: \fi
 2720: }
 2721: 
 2722: 
 2723: \def\thischaptername{No Chapter Title}
 2724: \outer\def\chapter{\parsearg\chapteryyy}
 2725: \def\chapteryyy #1{\numhead0{#1}} % normally numhead0 calls chapterzzz
 2726: \def\chapterzzz #1{\seccheck{chapter}%
 2727: \secno=0 \subsecno=0 \subsubsecno=0
 2728: \global\advance \chapno by 1 \message{\putwordChapter \the\chapno}%
 2729: \chapmacro {#1}{\the\chapno}%
 2730: \gdef\thissection{#1}%
 2731: \gdef\thischaptername{#1}%
 2732: % We don't substitute the actual chapter name into \thischapter
 2733: % because we don't want its macros evaluated now.
 2734: \xdef\thischapter{\putwordChapter{} \the\chapno: \noexpand\thischaptername}%
 2735: {\chapternofonts%
 2736: \edef\temp{{\realbackslash chapentry {#1}{\the\chapno}{\noexpand\folio}}}%
 2737: \escapechar=`\\%
 2738: \write \contentsfile \temp  %
 2739: \donoderef %
 2740: \global\let\section = \numberedsec
 2741: \global\let\subsection = \numberedsubsec
 2742: \global\let\subsubsection = \numberedsubsubsec
 2743: }}
 2744: 
 2745: \outer\def\appendix{\parsearg\appendixyyy}
 2746: \def\appendixyyy #1{\apphead0{#1}} % normally apphead0 calls appendixzzz
 2747: \def\appendixzzz #1{\seccheck{appendix}%
 2748: \secno=0 \subsecno=0 \subsubsecno=0
 2749: \global\advance \appendixno by 1 \message{Appendix \appendixletter}%
 2750: \chapmacro {#1}{\putwordAppendix{} \appendixletter}%
 2751: \gdef\thissection{#1}%
 2752: \gdef\thischaptername{#1}%
 2753: \xdef\thischapter{\putwordAppendix{} \appendixletter: \noexpand\thischaptername}%
 2754: {\chapternofonts%
 2755: \edef\temp{{\realbackslash chapentry
 2756:   {#1}{\putwordAppendix{} \appendixletter}{\noexpand\folio}}}%
 2757: \escapechar=`\\%
 2758: \write \contentsfile \temp  %
 2759: \appendixnoderef %
 2760: \global\let\section = \appendixsec
 2761: \global\let\subsection = \appendixsubsec
 2762: \global\let\subsubsection = \appendixsubsubsec
 2763: }}
 2764: 
 2765: % @centerchap is like @unnumbered, but the heading is centered.
 2766: \outer\def\centerchap{\parsearg\centerchapyyy}
 2767: \def\centerchapyyy #1{{\let\unnumbchapmacro=\centerchapmacro \unnumberedyyy{#1}}}
 2768: 
 2769: \outer\def\top{\parsearg\unnumberedyyy}
 2770: \outer\def\unnumbered{\parsearg\unnumberedyyy}
 2771: \def\unnumberedyyy #1{\unnmhead0{#1}} % normally unnmhead0 calls unnumberedzzz
 2772: \def\unnumberedzzz #1{\seccheck{unnumbered}%
 2773: \secno=0 \subsecno=0 \subsubsecno=0
 2774: %
 2775: % This used to be simply \message{#1}, but TeX fully expands the
 2776: % argument to \message.  Therefore, if #1 contained @-commands, TeX
 2777: % expanded them.  For example, in `@unnumbered The @cite{Book}', TeX
 2778: % expanded @cite (which turns out to cause errors because \cite is meant
 2779: % to be executed, not expanded).
 2780: %
 2781: % Anyway, we don't want the fully-expanded definition of @cite to appear
 2782: % as a result of the \message, we just want `@cite' itself.  We use
 2783: % \the<toks register> to achieve this: TeX expands \the<toks> only once,
 2784: % simply yielding the contents of the <toks register>.
 2785: \toks0 = {#1}\message{(\the\toks0)}%
 2786: %
 2787: \unnumbchapmacro {#1}%
 2788: \gdef\thischapter{#1}\gdef\thissection{#1}%
 2789: {\chapternofonts%
 2790: \edef\temp{{\realbackslash unnumbchapentry {#1}{\noexpand\folio}}}%
 2791: \escapechar=`\\%
 2792: \write \contentsfile \temp  %
 2793: \unnumbnoderef %
 2794: \global\let\section = \unnumberedsec
 2795: \global\let\subsection = \unnumberedsubsec
 2796: \global\let\subsubsection = \unnumberedsubsubsec
 2797: }}
 2798: 
 2799: \outer\def\numberedsec{\parsearg\secyyy}
 2800: \def\secyyy #1{\numhead1{#1}} % normally calls seczzz
 2801: \def\seczzz #1{\seccheck{section}%
 2802: \subsecno=0 \subsubsecno=0 \global\advance \secno by 1 %
 2803: \gdef\thissection{#1}\secheading {#1}{\the\chapno}{\the\secno}%
 2804: {\chapternofonts%
 2805: \edef\temp{{\realbackslash secentry %
 2806: {#1}{\the\chapno}{\the\secno}{\noexpand\folio}}}%
 2807: \escapechar=`\\%
 2808: \write \contentsfile \temp %
 2809: \donoderef %
 2810: \penalty 10000 %
 2811: }}
 2812: 
 2813: \outer\def\appendixsection{\parsearg\appendixsecyyy}
 2814: \outer\def\appendixsec{\parsearg\appendixsecyyy}
 2815: \def\appendixsecyyy #1{\apphead1{#1}} % normally calls appendixsectionzzz
 2816: \def\appendixsectionzzz #1{\seccheck{appendixsection}%
 2817: \subsecno=0 \subsubsecno=0 \global\advance \secno by 1 %
 2818: \gdef\thissection{#1}\secheading {#1}{\appendixletter}{\the\secno}%
 2819: {\chapternofonts%
 2820: \edef\temp{{\realbackslash secentry %
 2821: {#1}{\appendixletter}{\the\secno}{\noexpand\folio}}}%
 2822: \escapechar=`\\%
 2823: \write \contentsfile \temp %
 2824: \appendixnoderef %
 2825: \penalty 10000 %
 2826: }}
 2827: 
 2828: \outer\def\unnumberedsec{\parsearg\unnumberedsecyyy}
 2829: \def\unnumberedsecyyy #1{\unnmhead1{#1}} % normally calls unnumberedseczzz
 2830: \def\unnumberedseczzz #1{\seccheck{unnumberedsec}%
 2831: \plainsecheading {#1}\gdef\thissection{#1}%
 2832: {\chapternofonts%
 2833: \edef\temp{{\realbackslash unnumbsecentry{#1}{\noexpand\folio}}}%
 2834: \escapechar=`\\%
 2835: \write \contentsfile \temp %
 2836: \unnumbnoderef %
 2837: \penalty 10000 %
 2838: }}
 2839: 
 2840: \outer\def\numberedsubsec{\parsearg\numberedsubsecyyy}
 2841: \def\numberedsubsecyyy #1{\numhead2{#1}} % normally calls numberedsubseczzz
 2842: \def\numberedsubseczzz #1{\seccheck{subsection}%
 2843: \gdef\thissection{#1}\subsubsecno=0 \global\advance \subsecno by 1 %
 2844: \subsecheading {#1}{\the\chapno}{\the\secno}{\the\subsecno}%
 2845: {\chapternofonts%
 2846: \edef\temp{{\realbackslash subsecentry %
 2847: {#1}{\the\chapno}{\the\secno}{\the\subsecno}{\noexpand\folio}}}%
 2848: \escapechar=`\\%
 2849: \write \contentsfile \temp %
 2850: \donoderef %
 2851: \penalty 10000 %
 2852: }}
 2853: 
 2854: \outer\def\appendixsubsec{\parsearg\appendixsubsecyyy}
 2855: \def\appendixsubsecyyy #1{\apphead2{#1}} % normally calls appendixsubseczzz
 2856: \def\appendixsubseczzz #1{\seccheck{appendixsubsec}%
 2857: \gdef\thissection{#1}\subsubsecno=0 \global\advance \subsecno by 1 %
 2858: \subsecheading {#1}{\appendixletter}{\the\secno}{\the\subsecno}%
 2859: {\chapternofonts%
 2860: \edef\temp{{\realbackslash subsecentry %
 2861: {#1}{\appendixletter}{\the\secno}{\the\subsecno}{\noexpand\folio}}}%
 2862: \escapechar=`\\%
 2863: \write \contentsfile \temp %
 2864: \appendixnoderef %
 2865: \penalty 10000 %
 2866: }}
 2867: 
 2868: \outer\def\unnumberedsubsec{\parsearg\unnumberedsubsecyyy}
 2869: \def\unnumberedsubsecyyy #1{\unnmhead2{#1}} %normally calls unnumberedsubseczzz
 2870: \def\unnumberedsubseczzz #1{\seccheck{unnumberedsubsec}%
 2871: \plainsubsecheading {#1}\gdef\thissection{#1}%
 2872: {\chapternofonts%
 2873: \edef\temp{{\realbackslash unnumbsubsecentry{#1}{\noexpand\folio}}}%
 2874: \escapechar=`\\%
 2875: \write \contentsfile \temp %
 2876: \unnumbnoderef %
 2877: \penalty 10000 %
 2878: }}
 2879: 
 2880: \outer\def\numberedsubsubsec{\parsearg\numberedsubsubsecyyy}
 2881: \def\numberedsubsubsecyyy #1{\numhead3{#1}} % normally numberedsubsubseczzz
 2882: \def\numberedsubsubseczzz #1{\seccheck{subsubsection}%
 2883: \gdef\thissection{#1}\global\advance \subsubsecno by 1 %
 2884: \subsubsecheading {#1}
 2885:   {\the\chapno}{\the\secno}{\the\subsecno}{\the\subsubsecno}%
 2886: {\chapternofonts%
 2887: \edef\temp{{\realbackslash subsubsecentry %
 2888:   {#1}
 2889:   {\the\chapno}{\the\secno}{\the\subsecno}{\the\subsubsecno}
 2890:   {\noexpand\folio}}}%
 2891: \escapechar=`\\%
 2892: \write \contentsfile \temp %
 2893: \donoderef %
 2894: \penalty 10000 %
 2895: }}
 2896: 
 2897: \outer\def\appendixsubsubsec{\parsearg\appendixsubsubsecyyy}
 2898: \def\appendixsubsubsecyyy #1{\apphead3{#1}} % normally appendixsubsubseczzz
 2899: \def\appendixsubsubseczzz #1{\seccheck{appendixsubsubsec}%
 2900: \gdef\thissection{#1}\global\advance \subsubsecno by 1 %
 2901: \subsubsecheading {#1}
 2902:   {\appendixletter}{\the\secno}{\the\subsecno}{\the\subsubsecno}%
 2903: {\chapternofonts%
 2904: \edef\temp{{\realbackslash subsubsecentry{#1}%
 2905:   {\appendixletter}
 2906:   {\the\secno}{\the\subsecno}{\the\subsubsecno}{\noexpand\folio}}}%
 2907: \escapechar=`\\%
 2908: \write \contentsfile \temp %
 2909: \appendixnoderef %
 2910: \penalty 10000 %
 2911: }}
 2912: 
 2913: \outer\def\unnumberedsubsubsec{\parsearg\unnumberedsubsubsecyyy}
 2914: \def\unnumberedsubsubsecyyy #1{\unnmhead3{#1}} %normally unnumberedsubsubseczzz
 2915: \def\unnumberedsubsubseczzz #1{\seccheck{unnumberedsubsubsec}%
 2916: \plainsubsubsecheading {#1}\gdef\thissection{#1}%
 2917: {\chapternofonts%
 2918: \edef\temp{{\realbackslash unnumbsubsubsecentry{#1}{\noexpand\folio}}}%
 2919: \escapechar=`\\%
 2920: \write \contentsfile \temp %
 2921: \unnumbnoderef %
 2922: \penalty 10000 %
 2923: }}
 2924: 
 2925: % These are variants which are not "outer", so they can appear in @ifinfo.
 2926: % Actually, they should now be obsolete; ordinary section commands should work.
 2927: \def\infotop{\parsearg\unnumberedzzz}
 2928: \def\infounnumbered{\parsearg\unnumberedzzz}
 2929: \def\infounnumberedsec{\parsearg\unnumberedseczzz}
 2930: \def\infounnumberedsubsec{\parsearg\unnumberedsubseczzz}
 2931: \def\infounnumberedsubsubsec{\parsearg\unnumberedsubsubseczzz}
 2932: 
 2933: \def\infoappendix{\parsearg\appendixzzz}
 2934: \def\infoappendixsec{\parsearg\appendixseczzz}
 2935: \def\infoappendixsubsec{\parsearg\appendixsubseczzz}
 2936: \def\infoappendixsubsubsec{\parsearg\appendixsubsubseczzz}
 2937: 
 2938: \def\infochapter{\parsearg\chapterzzz}
 2939: \def\infosection{\parsearg\sectionzzz}
 2940: \def\infosubsection{\parsearg\subsectionzzz}
 2941: \def\infosubsubsection{\parsearg\subsubsectionzzz}
 2942: 
 2943: % These macros control what the section commands do, according
 2944: % to what kind of chapter we are in (ordinary, appendix, or unnumbered).
 2945: % Define them by default for a numbered chapter.
 2946: \global\let\section = \numberedsec
 2947: \global\let\subsection = \numberedsubsec
 2948: \global\let\subsubsection = \numberedsubsubsec
 2949: 
 2950: % Define @majorheading, @heading and @subheading
 2951: 
 2952: % NOTE on use of \vbox for chapter headings, section headings, and
 2953: % such:
 2954: %       1) We use \vbox rather than the earlier \line to permit
 2955: %          overlong headings to fold.
 2956: %       2) \hyphenpenalty is set to 10000 because hyphenation in a
 2957: %          heading is obnoxious; this forbids it.
 2958: %       3) Likewise, headings look best if no \parindent is used, and
 2959: %          if justification is not attempted.  Hence \raggedright.
 2960: 
 2961: 
 2962: \def\majorheading{\parsearg\majorheadingzzz}
 2963: \def\majorheadingzzz #1{%
 2964: {\advance\chapheadingskip by 10pt \chapbreak }%
 2965: {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
 2966:                   \parindent=0pt\raggedright
 2967:                   \rm #1\hfill}}\bigskip \par\penalty 200}
 2968: 
 2969: \def\chapheading{\parsearg\chapheadingzzz}
 2970: \def\chapheadingzzz #1{\chapbreak %
 2971: {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
 2972:                   \parindent=0pt\raggedright
 2973:                   \rm #1\hfill}}\bigskip \par\penalty 200}
 2974: 
 2975: % @heading, @subheading, @subsubheading.
 2976: \def\heading{\parsearg\plainsecheading}
 2977: \def\subheading{\parsearg\plainsubsecheading}
 2978: \def\subsubheading{\parsearg\plainsubsubsecheading}
 2979: 
 2980: % These macros generate a chapter, section, etc. heading only
 2981: % (including whitespace, linebreaking, etc. around it),
 2982: % given all the information in convenient, parsed form.
 2983: 
 2984: %%% Args are the skip and penalty (usually negative)
 2985: \def\dobreak#1#2{\par\ifdim\lastskip<#1\removelastskip\penalty#2\vskip#1\fi}
 2986: 
 2987: \def\setchapterstyle #1 {\csname CHAPF#1\endcsname}
 2988: 
 2989: %%% Define plain chapter starts, and page on/off switching for it
 2990: % Parameter controlling skip before chapter headings (if needed)
 2991: 
 2992: \newskip\chapheadingskip
 2993: 
 2994: \def\chapbreak{\dobreak \chapheadingskip {-4000}}
 2995: \def\chappager{\par\vfill\supereject}
 2996: \def\chapoddpage{\chappager \ifodd\pageno \else \hbox to 0pt{} \chappager\fi}
 2997: 
 2998: \def\setchapternewpage #1 {\csname CHAPPAG#1\endcsname}
 2999: 
 3000: \def\CHAPPAGoff{
 3001: \global\let\contentsalignmacro = \chappager
 3002: \global\let\pchapsepmacro=\chapbreak
 3003: \global\let\pagealignmacro=\chappager}
 3004: 
 3005: \def\CHAPPAGon{
 3006: \global\let\contentsalignmacro = \chappager
 3007: \global\let\pchapsepmacro=\chappager
 3008: \global\let\pagealignmacro=\chappager
 3009: \global\def\HEADINGSon{\HEADINGSsingle}}
 3010: 
 3011: \def\CHAPPAGodd{
 3012: \global\let\contentsalignmacro = \chapoddpage
 3013: \global\let\pchapsepmacro=\chapoddpage
 3014: \global\let\pagealignmacro=\chapoddpage
 3015: \global\def\HEADINGSon{\HEADINGSdouble}}
 3016: 
 3017: \CHAPPAGon
 3018: 
 3019: \def\CHAPFplain{
 3020: \global\let\chapmacro=\chfplain
 3021: \global\let\unnumbchapmacro=\unnchfplain
 3022: \global\let\centerchapmacro=\centerchfplain}
 3023: 
 3024: % Plain chapter opening.
 3025: % #1 is the text, #2 the chapter number or empty if unnumbered.
 3026: \def\chfplain#1#2{%
 3027:   \pchapsepmacro
 3028:   {%
 3029:     \chapfonts \rm
 3030:     \def\chapnum{#2}%
 3031:     \setbox0 = \hbox{#2\ifx\chapnum\empty\else\enspace\fi}%
 3032:     \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \raggedright
 3033:           \hangindent = \wd0 \centerparametersmaybe
 3034:           \unhbox0 #1\par}%
 3035:   }%
 3036:   \nobreak\bigskip % no page break after a chapter title
 3037:   \nobreak
 3038: }
 3039: 
 3040: % Plain opening for unnumbered.
 3041: \def\unnchfplain#1{\chfplain{#1}{}}
 3042: 
 3043: % @centerchap -- centered and unnumbered.
 3044: \let\centerparametersmaybe = \relax
 3045: \def\centerchfplain#1{{%
 3046:   \def\centerparametersmaybe{%
 3047:     \advance\rightskip by 3\rightskip
 3048:     \leftskip = \rightskip
 3049:     \parfillskip = 0pt
 3050:   }%
 3051:   \chfplain{#1}{}%
 3052: }}
 3053: 
 3054: \CHAPFplain % The default
 3055: 
 3056: \def\unnchfopen #1{%
 3057: \chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
 3058:                        \parindent=0pt\raggedright
 3059:                        \rm #1\hfill}}\bigskip \par\penalty 10000 %
 3060: }
 3061: 
 3062: \def\chfopen #1#2{\chapoddpage {\chapfonts
 3063: \vbox to 3in{\vfil \hbox to\hsize{\hfil #2} \hbox to\hsize{\hfil #1} \vfil}}%
 3064: \par\penalty 5000 %
 3065: }
 3066: 
 3067: \def\centerchfopen #1{%
 3068: \chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
 3069:                        \parindent=0pt
 3070:                        \hfill {\rm #1}\hfill}}\bigskip \par\penalty 10000 %
 3071: }
 3072: 
 3073: \def\CHAPFopen{
 3074: \global\let\chapmacro=\chfopen
 3075: \global\let\unnumbchapmacro=\unnchfopen
 3076: \global\let\centerchapmacro=\centerchfopen}
 3077: 
 3078: 
 3079: % Section titles.
 3080: \newskip\secheadingskip
 3081: \def\secheadingbreak{\dobreak \secheadingskip {-1000}}
 3082: \def\secheading#1#2#3{\sectionheading{sec}{#2.#3}{#1}}
 3083: \def\plainsecheading#1{\sectionheading{sec}{}{#1}}
 3084: 
 3085: % Subsection titles.
 3086: \newskip \subsecheadingskip
 3087: \def\subsecheadingbreak{\dobreak \subsecheadingskip {-500}}
 3088: \def\subsecheading#1#2#3#4{\sectionheading{subsec}{#2.#3.#4}{#1}}
 3089: \def\plainsubsecheading#1{\sectionheading{subsec}{}{#1}}
 3090: 
 3091: % Subsubsection titles.
 3092: \let\subsubsecheadingskip = \subsecheadingskip
 3093: \let\subsubsecheadingbreak = \subsecheadingbreak
 3094: \def\subsubsecheading#1#2#3#4#5{\sectionheading{subsubsec}{#2.#3.#4.#5}{#1}}
 3095: \def\plainsubsubsecheading#1{\sectionheading{subsubsec}{}{#1}}
 3096: 
 3097: 
 3098: % Print any size section title.
 3099: % 
 3100: % #1 is the section type (sec/subsec/subsubsec), #2 is the section
 3101: % number (maybe empty), #3 the text.
 3102: \def\sectionheading#1#2#3{%
 3103:   {%
 3104:     \expandafter\advance\csname #1headingskip\endcsname by \parskip
 3105:     \csname #1headingbreak\endcsname
 3106:   }%
 3107:   {%
 3108:     % Switch to the right set of fonts.
 3109:     \csname #1fonts\endcsname \rm
 3110:     %
 3111:     % Only insert the separating space if we have a section number.
 3112:     \def\secnum{#2}%
 3113:     \setbox0 = \hbox{#2\ifx\secnum\empty\else\enspace\fi}%
 3114:     %
 3115:     \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \raggedright
 3116:           \hangindent = \wd0 % zero if no section number
 3117:           \unhbox0 #3}%
 3118:   }%
 3119:   \ifdim\parskip<10pt \nobreak\kern10pt\nobreak\kern-\parskip\fi \nobreak
 3120: }
 3121: 
 3122: 
 3123: \message{toc printing,}
 3124: % Finish up the main text and prepare to read what we've written
 3125: % to \contentsfile.
 3126: 
 3127: \newskip\contentsrightmargin \contentsrightmargin=1in
 3128: \def\startcontents#1{%
 3129:    % If @setchapternewpage on, and @headings double, the contents should
 3130:    % start on an odd page, unlike chapters.  Thus, we maintain
 3131:    % \contentsalignmacro in parallel with \pagealignmacro.
 3132:    % From: Torbjorn Granlund <tege@matematik.su.se>
 3133:    \contentsalignmacro
 3134:    \immediate\closeout \contentsfile
 3135:    \ifnum \pageno>0
 3136:       \pageno = -1              % Request roman numbered pages.
 3137:    \fi
 3138:    % Don't need to put `Contents' or `Short Contents' in the headline.
 3139:    % It is abundantly clear what they are.
 3140:    \unnumbchapmacro{#1}\def\thischapter{}%
 3141:    \begingroup                  % Set up to handle contents files properly.
 3142:       \catcode`\\=0  \catcode`\{=1  \catcode`\}=2  \catcode`\@=11
 3143:       \catcode`\^=7 % to see ^^e4 as \"a etc. juha@piuha.ydi.vtt.fi
 3144:       \raggedbottom             % Worry more about breakpoints than the bottom.
 3145:       \advance\hsize by -\contentsrightmargin % Don't use the full line length.
 3146: }
 3147: 
 3148: 
 3149: % Normal (long) toc.
 3150: \outer\def\contents{%
 3151:    \startcontents{\putwordTableofContents}%
 3152:       \input \jobname.toc
 3153:    \endgroup
 3154:    \vfill \eject
 3155: }
 3156: 
 3157: % And just the chapters.
 3158: \outer\def\summarycontents{%
 3159:    \startcontents{\putwordShortContents}%
 3160:       %
 3161:       \let\chapentry = \shortchapentry
 3162:       \let\unnumbchapentry = \shortunnumberedentry
 3163:       % We want a true roman here for the page numbers.
 3164:       \secfonts
 3165:       \let\rm=\shortcontrm \let\bf=\shortcontbf \let\sl=\shortcontsl
 3166:       \rm
 3167:       \hyphenpenalty = 10000
 3168:       \advance\baselineskip by 1pt % Open it up a little.
 3169:       \def\secentry ##1##2##3##4{}
 3170:       \def\unnumbsecentry ##1##2{}
 3171:       \def\subsecentry ##1##2##3##4##5{}
 3172:       \def\unnumbsubsecentry ##1##2{}
 3173:       \def\subsubsecentry ##1##2##3##4##5##6{}
 3174:       \def\unnumbsubsubsecentry ##1##2{}
 3175:       \input \jobname.toc
 3176:    \endgroup
 3177:    \vfill \eject
 3178: }
 3179: \let\shortcontents = \summarycontents
 3180: 
 3181: % These macros generate individual entries in the table of contents.
 3182: % The first argument is the chapter or section name.
 3183: % The last argument is the page number.
 3184: % The arguments in between are the chapter number, section number, ...
 3185: 
 3186: % Chapter-level things, for both the long and short contents.
 3187: \def\chapentry#1#2#3{\dochapentry{#2\labelspace#1}{#3}}
 3188: 
 3189: % See comments in \dochapentry re vbox and related settings
 3190: \def\shortchapentry#1#2#3{%
 3191:   \tocentry{\shortchaplabel{#2}\labelspace #1}{\doshortpageno{#3}}%
 3192: }
 3193: 
 3194: % Typeset the label for a chapter or appendix for the short contents.
 3195: % The arg is, e.g. `Appendix A' for an appendix, or `3' for a chapter.
 3196: % We could simplify the code here by writing out an \appendixentry
 3197: % command in the toc file for appendices, instead of using \chapentry
 3198: % for both, but it doesn't seem worth it.
 3199: \setbox0 = \hbox{\shortcontrm \putwordAppendix }
 3200: \newdimen\shortappendixwidth \shortappendixwidth = \wd0
 3201: 
 3202: \def\shortchaplabel#1{%
 3203:   % We typeset #1 in a box of constant width, regardless of the text of
 3204:   % #1, so the chapter titles will come out aligned.
 3205:   \setbox0 = \hbox{#1}%
 3206:   \dimen0 = \ifdim\wd0 > \shortappendixwidth \shortappendixwidth \else 0pt \fi
 3207:   %
 3208:   % This space should be plenty, since a single number is .5em, and the
 3209:   % widest letter (M) is 1em, at least in the Computer Modern fonts.
 3210:   % (This space doesn't include the extra space that gets added after
 3211:   % the label; that gets put in by \shortchapentry above.)
 3212:   \advance\dimen0 by 1.1em
 3213:   \hbox to \dimen0{#1\hfil}%
 3214: }
 3215: 
 3216: \def\unnumbchapentry#1#2{\dochapentry{#1}{#2}}
 3217: \def\shortunnumberedentry#1#2{\tocentry{#1}{\doshortpageno{#2}}}
 3218: 
 3219: % Sections.
 3220: \def\secentry#1#2#3#4{\dosecentry{#2.#3\labelspace#1}{#4}}
 3221: \def\unnumbsecentry#1#2{\dosecentry{#1}{#2}}
 3222: 
 3223: % Subsections.
 3224: \def\subsecentry#1#2#3#4#5{\dosubsecentry{#2.#3.#4\labelspace#1}{#5}}
 3225: \def\unnumbsubsecentry#1#2{\dosubsecentry{#1}{#2}}
 3226: 
 3227: % And subsubsections.
 3228: \def\subsubsecentry#1#2#3#4#5#6{%
 3229:   \dosubsubsecentry{#2.#3.#4.#5\labelspace#1}{#6}}
 3230: \def\unnumbsubsubsecentry#1#2{\dosubsubsecentry{#1}{#2}}
 3231: 
 3232: % This parameter controls the indentation of the various levels.
 3233: \newdimen\tocindent \tocindent = 3pc
 3234: 
 3235: % Now for the actual typesetting. In all these, #1 is the text and #2 is the
 3236: % page number.
 3237: %
 3238: % If the toc has to be broken over pages, we want it to be at chapters
 3239: % if at all possible; hence the \penalty.
 3240: \def\dochapentry#1#2{%
 3241:    \penalty-300 \vskip1\baselineskip plus.33\baselineskip minus.25\baselineskip
 3242:    \begingroup
 3243:      \chapentryfonts
 3244:      \tocentry{#1}{\dopageno{#2}}%
 3245:    \endgroup
 3246:    \nobreak\vskip .25\baselineskip plus.1\baselineskip
 3247: }
 3248: 
 3249: \def\dosecentry#1#2{\begingroup
 3250:   \secentryfonts \leftskip=\tocindent
 3251:   \tocentry{#1}{\dopageno{#2}}%
 3252: \endgroup}
 3253: 
 3254: \def\dosubsecentry#1#2{\begingroup
 3255:   \subsecentryfonts \leftskip=2\tocindent
 3256:   \tocentry{#1}{\dopageno{#2}}%
 3257: \endgroup}
 3258: 
 3259: \def\dosubsubsecentry#1#2{\begingroup
 3260:   \subsubsecentryfonts \leftskip=3\tocindent
 3261:   \tocentry{#1}{\dopageno{#2}}%
 3262: \endgroup}
 3263: 
 3264: % Final typesetting of a toc entry; we use the same \entry macro as for
 3265: % the index entries, but we want to suppress hyphenation here.  (We
 3266: % can't do that in the \entry macro, since index entries might consist
 3267: % of hyphenated-identifiers-that-do-not-fit-on-a-line-and-nothing-else.)
 3268: %
 3269: % \turnoffactive is for the sake of @" used for umlauts.
 3270: \def\tocentry#1#2{\begingroup
 3271:   \vskip 0pt plus1pt % allow a little stretch for the sake of nice page breaks
 3272:   \entry{\turnoffactive #1}{\turnoffactive #2}%
 3273: \endgroup}
 3274: 
 3275: % Space between chapter (or whatever) number and the title.
 3276: \def\labelspace{\hskip1em \relax}
 3277: 
 3278: \def\dopageno#1{{\rm #1}}
 3279: \def\doshortpageno#1{{\rm #1}}
 3280: 
 3281: \def\chapentryfonts{\secfonts \rm}
 3282: \def\secentryfonts{\textfonts}
 3283: \let\subsecentryfonts = \textfonts
 3284: \let\subsubsecentryfonts = \textfonts
 3285: 
 3286: 
 3287: \message{environments,}
 3288: 
 3289: % Since these characters are used in examples, it should be an even number of
 3290: % \tt widths. Each \tt character is 1en, so two makes it 1em.
 3291: % Furthermore, these definitions must come after we define our fonts.
 3292: \newbox\dblarrowbox    \newbox\longdblarrowbox
 3293: \newbox\pushcharbox    \newbox\bullbox
 3294: \newbox\equivbox       \newbox\errorbox
 3295: 
 3296: %{\tentt
 3297: %\global\setbox\dblarrowbox = \hbox to 1em{\hfil$\Rightarrow$\hfil}
 3298: %\global\setbox\longdblarrowbox = \hbox to 1em{\hfil$\mapsto$\hfil}
 3299: %\global\setbox\pushcharbox = \hbox to 1em{\hfil$\dashv$\hfil}
 3300: %\global\setbox\equivbox = \hbox to 1em{\hfil$\ptexequiv$\hfil}
 3301: % Adapted from the manmac format (p.420 of TeXbook)
 3302: %\global\setbox\bullbox = \hbox to 1em{\kern.15em\vrule height .75ex width .85ex
 3303: %                                      depth .1ex\hfil}
 3304: %}
 3305: 
 3306: % @point{}, @result{}, @expansion{}, @print{}, @equiv{}.
 3307: \def\point{$\star$}
 3308: \def\result{\leavevmode\raise.15ex\hbox to 1em{\hfil$\Rightarrow$\hfil}}
 3309: \def\expansion{\leavevmode\raise.1ex\hbox to 1em{\hfil$\mapsto$\hfil}}
 3310: \def\print{\leavevmode\lower.1ex\hbox to 1em{\hfil$\dashv$\hfil}}
 3311: \def\equiv{\leavevmode\lower.1ex\hbox to 1em{\hfil$\ptexequiv$\hfil}}
 3312: 
 3313: % Adapted from the TeXbook's \boxit.
 3314: {\tentt \global\dimen0 = 3em}% Width of the box.
 3315: \dimen2 = .55pt % Thickness of rules
 3316: % The text. (`r' is open on the right, `e' somewhat less so on the left.)
 3317: \setbox0 = \hbox{\kern-.75pt \tensf error\kern-1.5pt}
 3318: 
 3319: \global\setbox\errorbox=\hbox to \dimen0{\hfil
 3320:    \hsize = \dimen0 \advance\hsize by -5.8pt % Space to left+right.
 3321:    \advance\hsize by -2\dimen2 % Rules.
 3322:    \vbox{
 3323:       \hrule height\dimen2
 3324:       \hbox{\vrule width\dimen2 \kern3pt          % Space to left of text.
 3325:          \vtop{\kern2.4pt \box0 \kern2.4pt}% Space above/below.
 3326:          \kern3pt\vrule width\dimen2}% Space to right.
 3327:       \hrule height\dimen2}
 3328:     \hfil}
 3329: 
 3330: % The @error{} command.
 3331: \def\error{\leavevmode\lower.7ex\copy\errorbox}
 3332: 
 3333: % @tex ... @end tex    escapes into raw Tex temporarily.
 3334: % One exception: @ is still an escape character, so that @end tex works.
 3335: % But \@ or @@ will get a plain tex @ character.
 3336: 
 3337: \def\tex{\begingroup
 3338: \catcode `\\=0 \catcode `\{=1 \catcode `\}=2
 3339: \catcode `\$=3 \catcode `\&=4 \catcode `\#=6
 3340: \catcode `\^=7 \catcode `\_=8 \catcode `\~=13 \let~=\tie
 3341: \catcode `\%=14
 3342: \catcode 43=12 % plus
 3343: \catcode`\"=12
 3344: \catcode`\==12
 3345: \catcode`\|=12
 3346: \catcode`\<=12
 3347: \catcode`\>=12
 3348: \escapechar=`\\
 3349: %
 3350: \let\,=\ptexcomma
 3351: \let\~=\ptextilde
 3352: \let\{=\ptexlbrace
 3353: \let\}=\ptexrbrace
 3354: \let\.=\ptexdot
 3355: \let\*=\ptexstar
 3356: \let\dots=\ptexdots
 3357: \def\endldots{\mathinner{\ldots\ldots\ldots\ldots}}
 3358: \def\enddots{\relax\ifmmode\endldots\else$\mathsurround=0pt \endldots\,$\fi}
 3359: \def\@{@}%
 3360: \let\bullet=\ptexbullet
 3361: \let\b=\ptexb \let\c=\ptexc \let\i=\ptexi \let\t=\ptext
 3362: %
 3363: \let\Etex=\endgroup}
 3364: 
 3365: % Define @lisp ... @endlisp.
 3366: % @lisp does a \begingroup so it can rebind things,
 3367: % including the definition of @endlisp (which normally is erroneous).
 3368: 
 3369: % Amount to narrow the margins by for @lisp.
 3370: \newskip\lispnarrowing \lispnarrowing=0.4in
 3371: 
 3372: % This is the definition that ^^M gets inside @lisp, @example, and other
 3373: % such environments.  \null is better than a space, since it doesn't
 3374: % have any width.
 3375: \def\lisppar{\null\endgraf}
 3376: 
 3377: % Make each space character in the input produce a normal interword
 3378: % space in the output.  Don't allow a line break at this space, as this
 3379: % is used only in environments like @example, where each line of input
 3380: % should produce a line of output anyway.
 3381: %
 3382: {\obeyspaces %
 3383: \gdef\sepspaces{\obeyspaces\let =\tie}}
 3384: 
 3385: % Define \obeyedspace to be our active space, whatever it is.  This is
 3386: % for use in \parsearg.
 3387: {\sepspaces%
 3388: \global\let\obeyedspace= }
 3389: 
 3390: % This space is always present above and below environments.
 3391: \newskip\envskipamount \envskipamount = 0pt
 3392: 
 3393: % Make spacing and below environment symmetrical.  We use \parskip here
 3394: % to help in doing that, since in @example-like environments \parskip
 3395: % is reset to zero; thus the \afterenvbreak inserts no space -- but the
 3396: % start of the next paragraph will insert \parskip
 3397: %
 3398: \def\aboveenvbreak{{\advance\envskipamount by \parskip
 3399: \endgraf \ifdim\lastskip<\envskipamount
 3400: \removelastskip \penalty-50 \vskip\envskipamount \fi}}
 3401: 
 3402: \let\afterenvbreak = \aboveenvbreak
 3403: 
 3404: % \nonarrowing is a flag.  If "set", @lisp etc don't narrow margins.
 3405: \let\nonarrowing=\relax
 3406: 
 3407: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 3408: % \cartouche: draw rectangle w/rounded corners around argument
 3409: \font\circle=lcircle10
 3410: \newdimen\circthick
 3411: \newdimen\cartouter\newdimen\cartinner
 3412: \newskip\normbskip\newskip\normpskip\newskip\normlskip
 3413: \circthick=\fontdimen8\circle
 3414: %
 3415: \def\ctl{{\circle\char'013\hskip -6pt}}% 6pt from pl file: 1/2charwidth
 3416: \def\ctr{{\hskip 6pt\circle\char'010}}
 3417: \def\cbl{{\circle\char'012\hskip -6pt}}
 3418: \def\cbr{{\hskip 6pt\circle\char'011}}
 3419: \def\carttop{\hbox to \cartouter{\hskip\lskip
 3420:         \ctl\leaders\hrule height\circthick\hfil\ctr
 3421:         \hskip\rskip}}
 3422: \def\cartbot{\hbox to \cartouter{\hskip\lskip
 3423:         \cbl\leaders\hrule height\circthick\hfil\cbr
 3424:         \hskip\rskip}}
 3425: %
 3426: \newskip\lskip\newskip\rskip
 3427: 
 3428: \long\def\cartouche{%
 3429: \begingroup
 3430:         \lskip=\leftskip \rskip=\rightskip
 3431:         \leftskip=0pt\rightskip=0pt %we want these *outside*.
 3432:         \cartinner=\hsize \advance\cartinner by-\lskip
 3433:                           \advance\cartinner by-\rskip
 3434:         \cartouter=\hsize
 3435:         \advance\cartouter by 18pt % allow for 3pt kerns on either
 3436: %                                    side, and for 6pt waste from
 3437: %                                    each corner char
 3438:         \normbskip=\baselineskip \normpskip=\parskip \normlskip=\lineskip
 3439:         % Flag to tell @lisp, etc., not to narrow margin.
 3440:         \let\nonarrowing=\comment
 3441:         \vbox\bgroup
 3442:                 \baselineskip=0pt\parskip=0pt\lineskip=0pt
 3443:                 \carttop
 3444:                 \hbox\bgroup
 3445:                         \hskip\lskip
 3446:                         \vrule\kern3pt
 3447:                         \vbox\bgroup
 3448:                                 \hsize=\cartinner
 3449:                                 \kern3pt
 3450:                                 \begingroup
 3451:                                         \baselineskip=\normbskip
 3452:                                         \lineskip=\normlskip
 3453:                                         \parskip=\normpskip
 3454:                                         \vskip -\parskip
 3455: \def\Ecartouche{%
 3456:                                 \endgroup
 3457:                                 \kern3pt
 3458:                         \egroup
 3459:                         \kern3pt\vrule
 3460:                         \hskip\rskip
 3461:                 \egroup
 3462:                 \cartbot
 3463:         \egroup
 3464: \endgroup
 3465: }}
 3466: 
 3467: 
 3468: % This macro is called at the beginning of all the @example variants,
 3469: % inside a group.
 3470: \def\nonfillstart{%
 3471:   \aboveenvbreak
 3472:   \inENV % This group ends at the end of the body
 3473:   \hfuzz = 12pt % Don't be fussy
 3474:   \sepspaces % Make spaces be word-separators rather than space tokens.
 3475:   \singlespace
 3476:   \let\par = \lisppar % don't ignore blank lines
 3477:   \obeylines % each line of input is a line of output
 3478:   \parskip = 0pt
 3479:   \parindent = 0pt
 3480:   \emergencystretch = 0pt % don't try to avoid overfull boxes
 3481:   % @cartouche defines \nonarrowing to inhibit narrowing
 3482:   % at next level down.
 3483:   \ifx\nonarrowing\relax
 3484:     \advance \leftskip by \lispnarrowing
 3485:     \exdentamount=\lispnarrowing
 3486:     \let\exdent=\nofillexdent
 3487:     \let\nonarrowing=\relax
 3488:   \fi
 3489: }
 3490: 
 3491: % To ending an @example-like environment, we first end the paragraph
 3492: % (via \afterenvbreak's vertical glue), and then the group.  That way we
 3493: % keep the zero \parskip that the environments set -- \parskip glue
 3494: % will be inserted at the beginning of the next paragraph in the
 3495: % document, after the environment.
 3496: %
 3497: \def\nonfillfinish{\afterenvbreak\endgroup}%
 3498: 
 3499: % This macro is
 3500: \def\lisp{\begingroup
 3501:   \nonfillstart
 3502:   \let\Elisp = \nonfillfinish
 3503:   \tt
 3504:   \rawbackslash % have \ input char produce \ char from current font
 3505:   \gobble
 3506: }
 3507: 
 3508: % Define the \E... control sequence only if we are inside the
 3509: % environment, so the error checking in \end will work.
 3510: %
 3511: % We must call \lisp last in the definition, since it reads the
 3512: % return following the @example (or whatever) command.
 3513: %
 3514: \def\example{\begingroup \def\Eexample{\nonfillfinish\endgroup}\lisp}
 3515: \def\smallexample{\begingroup \def\Esmallexample{\nonfillfinish\endgroup}\lisp}
 3516: \def\smalllisp{\begingroup \def\Esmalllisp{\nonfillfinish\endgroup}\lisp}
 3517: 
 3518: % @smallexample and @smalllisp.  This is not used unless the @smallbook
 3519: % command is given.  Originally contributed by Pavel@xerox.
 3520: %
 3521: \def\smalllispx{\begingroup
 3522:   \nonfillstart
 3523:   \let\Esmalllisp = \nonfillfinish
 3524:   \let\Esmallexample = \nonfillfinish
 3525:   %
 3526:   % Smaller fonts for small examples.
 3527:   \indexfonts \tt
 3528:   \rawbackslash % make \ output the \ character from the current font (tt)
 3529:   \gobble
 3530: }
 3531: 
 3532: % This is @display; same as @lisp except use roman font.
 3533: %
 3534: \def\display{\begingroup
 3535:   \nonfillstart
 3536:   \let\Edisplay = \nonfillfinish
 3537:   \gobble
 3538: }
 3539: 
 3540: % This is @format; same as @display except don't narrow margins.
 3541: %
 3542: \def\format{\begingroup
 3543:   \let\nonarrowing = t
 3544:   \nonfillstart
 3545:   \let\Eformat = \nonfillfinish
 3546:   \gobble
 3547: }
 3548: 
 3549: % @flushleft (same as @format) and @flushright.
 3550: %
 3551: \def\flushleft{\begingroup
 3552:   \let\nonarrowing = t
 3553:   \nonfillstart
 3554:   \let\Eflushleft = \nonfillfinish
 3555:   \gobble
 3556: }
 3557: \def\flushright{\begingroup
 3558:   \let\nonarrowing = t
 3559:   \nonfillstart
 3560:   \let\Eflushright = \nonfillfinish
 3561:   \advance\leftskip by 0pt plus 1fill
 3562:   \gobble}
 3563: 
 3564: % @quotation does normal linebreaking (hence we can't use \nonfillstart)
 3565: % and narrows the margins.
 3566: %
 3567: \def\quotation{%
 3568:   \begingroup\inENV %This group ends at the end of the @quotation body
 3569:   {\parskip=0pt \aboveenvbreak}% because \aboveenvbreak inserts \parskip
 3570:   \singlespace
 3571:   \parindent=0pt
 3572:   % We have retained a nonzero parskip for the environment, since we're
 3573:   % doing normal filling. So to avoid extra space below the environment...
 3574:   \def\Equotation{\parskip = 0pt \nonfillfinish}%
 3575:   %
 3576:   % @cartouche defines \nonarrowing to inhibit narrowing at next level down.
 3577:   \ifx\nonarrowing\relax
 3578:     \advance\leftskip by \lispnarrowing
 3579:     \advance\rightskip by \lispnarrowing
 3580:     \exdentamount = \lispnarrowing
 3581:     \let\nonarrowing = \relax
 3582:   \fi
 3583: }
 3584: 
 3585: \message{defuns,}
 3586: % Define formatter for defuns
 3587: % First, allow user to change definition object font (\df) internally
 3588: \def\setdeffont #1 {\csname DEF#1\endcsname}
 3589: 
 3590: \newskip\defbodyindent \defbodyindent=.4in
 3591: \newskip\defargsindent \defargsindent=50pt
 3592: \newskip\deftypemargin \deftypemargin=12pt
 3593: \newskip\deflastargmargin \deflastargmargin=18pt
 3594: 
 3595: \newcount\parencount
 3596: % define \functionparens, which makes ( and ) and & do special things.
 3597: % \functionparens affects the group it is contained in.
 3598: \def\activeparens{%
 3599: \catcode`\(=\active \catcode`\)=\active \catcode`\&=\active
 3600: \catcode`\[=\active \catcode`\]=\active}
 3601: 
 3602: % Make control sequences which act like normal parenthesis chars.
 3603: \let\lparen = ( \let\rparen = )
 3604: 
 3605: {\activeparens % Now, smart parens don't turn on until &foo (see \amprm)
 3606: 
 3607: % Be sure that we always have a definition for `(', etc.  For example,
 3608: % if the fn name has parens in it, \boldbrax will not be in effect yet,
 3609: % so TeX would otherwise complain about undefined control sequence.
 3610: \global\let(=\lparen \global\let)=\rparen
 3611: \global\let[=\lbrack \global\let]=\rbrack
 3612: 
 3613: \gdef\functionparens{\boldbrax\let&=\amprm\parencount=0 }
 3614: \gdef\boldbrax{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb}
 3615: % This is used to turn on special parens
 3616: % but make & act ordinary (given that it's active).
 3617: \gdef\boldbraxnoamp{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb\let&=\ampnr}
 3618: 
 3619: % Definitions of (, ) and & used in args for functions.
 3620: % This is the definition of ( outside of all parentheses.
 3621: \gdef\oprm#1 {{\rm\char`\(}#1 \bf \let(=\opnested %
 3622: \global\advance\parencount by 1 }
 3623: %
 3624: % This is the definition of ( when already inside a level of parens.
 3625: \gdef\opnested{\char`\(\global\advance\parencount by 1 }
 3626: %
 3627: \gdef\clrm{% Print a paren in roman if it is taking us back to depth of 0.
 3628: % also in that case restore the outer-level definition of (.
 3629: \ifnum \parencount=1 {\rm \char `\)}\sl \let(=\oprm \else \char `\) \fi
 3630: \global\advance \parencount by -1 }
 3631: % If we encounter &foo, then turn on ()-hacking afterwards
 3632: \gdef\amprm#1 {{\rm\&#1}\let(=\oprm \let)=\clrm\ }
 3633: %
 3634: \gdef\normalparens{\boldbrax\let&=\ampnr}
 3635: } % End of definition inside \activeparens
 3636: %% These parens (in \boldbrax) actually are a little bolder than the
 3637: %% contained text.  This is especially needed for [ and ]
 3638: \def\opnr{{\sf\char`\(}} \def\clnr{{\sf\char`\)}} \def\ampnr{\&}
 3639: \def\lbrb{{\bf\char`\[}} \def\rbrb{{\bf\char`\]}}
 3640: 
 3641: % First, defname, which formats the header line itself.
 3642: % #1 should be the function name.
 3643: % #2 should be the type of definition, such as "Function".
 3644: 
 3645: \def\defname #1#2{%
 3646: % Get the values of \leftskip and \rightskip as they were
 3647: % outside the @def...
 3648: \dimen2=\leftskip
 3649: \advance\dimen2 by -\defbodyindent
 3650: \dimen3=\rightskip
 3651: \advance\dimen3 by -\defbodyindent
 3652: \noindent        %
 3653: \setbox0=\hbox{\hskip \deflastargmargin{\rm #2}\hskip \deftypemargin}%
 3654: \dimen0=\hsize \advance \dimen0 by -\wd0 % compute size for first line
 3655: \dimen1=\hsize \advance \dimen1 by -\defargsindent %size for continuations
 3656: \parshape 2 0in \dimen0 \defargsindent \dimen1     %
 3657: % Now output arg 2 ("Function" or some such)
 3658: % ending at \deftypemargin from the right margin,
 3659: % but stuck inside a box of width 0 so it does not interfere with linebreaking
 3660: {% Adjust \hsize to exclude the ambient margins,
 3661: % so that \rightline will obey them.
 3662: \advance \hsize by -\dimen2 \advance \hsize by -\dimen3
 3663: \rlap{\rightline{{\rm #2}\hskip \deftypemargin}}}%
 3664: % Make all lines underfull and no complaints:
 3665: \tolerance=10000 \hbadness=10000
 3666: \advance\leftskip by -\defbodyindent
 3667: \exdentamount=\defbodyindent
 3668: {\df #1}\enskip        % Generate function name
 3669: }
 3670: 
 3671: % Actually process the body of a definition
 3672: % #1 should be the terminating control sequence, such as \Edefun.
 3673: % #2 should be the "another name" control sequence, such as \defunx.
 3674: % #3 should be the control sequence that actually processes the header,
 3675: %    such as \defunheader.
 3676: 
 3677: \def\defparsebody #1#2#3{\begingroup\inENV% Environment for definitionbody
 3678: \medbreak %
 3679: % Define the end token that this defining construct specifies
 3680: % so that it will exit this group.
 3681: \def#1{\endgraf\endgroup\medbreak}%
 3682: \def#2{\begingroup\obeylines\activeparens\spacesplit#3}%
 3683: \parindent=0in
 3684: \advance\leftskip by \defbodyindent \advance \rightskip by \defbodyindent
 3685: \exdentamount=\defbodyindent
 3686: \begingroup %
 3687: \catcode 61=\active % 61 is `='
 3688: \obeylines\activeparens\spacesplit#3}
 3689: 
 3690: \def\defmethparsebody #1#2#3#4 {\begingroup\inENV %
 3691: \medbreak %
 3692: % Define the end token that this defining construct specifies
 3693: % so that it will exit this group.
 3694: \def#1{\endgraf\endgroup\medbreak}%
 3695: \def#2##1 {\begingroup\obeylines\activeparens\spacesplit{#3{##1}}}%
 3696: \parindent=0in
 3697: \advance\leftskip by \defbodyindent \advance \rightskip by \defbodyindent
 3698: \exdentamount=\defbodyindent
 3699: \begingroup\obeylines\activeparens\spacesplit{#3{#4}}}
 3700: 
 3701: \def\defopparsebody #1#2#3#4#5 {\begingroup\inENV %
 3702: \medbreak %
 3703: % Define the end token that this defining construct specifies
 3704: % so that it will exit this group.
 3705: \def#1{\endgraf\endgroup\medbreak}%
 3706: \def#2##1 ##2 {\def#4{##1}%
 3707: \begingroup\obeylines\activeparens\spacesplit{#3{##2}}}%
 3708: \parindent=0in
 3709: \advance\leftskip by \defbodyindent \advance \rightskip by \defbodyindent
 3710: \exdentamount=\defbodyindent
 3711: \begingroup\obeylines\activeparens\spacesplit{#3{#5}}}
 3712: 
 3713: % These parsing functions are similar to the preceding ones
 3714: % except that they do not make parens into active characters.
 3715: % These are used for "variables" since they have no arguments.
 3716: 
 3717: \def\defvarparsebody #1#2#3{\begingroup\inENV% Environment for definitionbody
 3718: \medbreak %
 3719: % Define the end token that this defining construct specifies
 3720: % so that it will exit this group.
 3721: \def#1{\endgraf\endgroup\medbreak}%
 3722: \def#2{\begingroup\obeylines\spacesplit#3}%
 3723: \parindent=0in
 3724: \advance\leftskip by \defbodyindent \advance \rightskip by \defbodyindent
 3725: \exdentamount=\defbodyindent
 3726: \begingroup %
 3727: \catcode 61=\active %
 3728: \obeylines\spacesplit#3}
 3729: 
 3730: % This is used for \def{tp,vr}parsebody.  It could probably be used for
 3731: % some of the others, too, with some judicious conditionals.
 3732: % 
 3733: \def\parsebodycommon#1#2#3{%
 3734:   \begingroup\inENV %
 3735:   \medbreak %
 3736:   % Define the end token that this defining construct specifies
 3737:   % so that it will exit this group.
 3738:   \def#1{\endgraf\endgroup\medbreak}%
 3739:   \def#2##1 {\begingroup\obeylines\spacesplit{#3{##1}}}%
 3740:   \parindent=0in
 3741:   \advance\leftskip by \defbodyindent \advance \rightskip by \defbodyindent
 3742:   \exdentamount=\defbodyindent
 3743:   \begingroup\obeylines
 3744: }
 3745: 
 3746: \def\defvrparsebody#1#2#3#4 {%
 3747:   \parsebodycommon{#1}{#2}{#3}%
 3748:   \spacesplit{#3{#4}}%
 3749: }
 3750: 
 3751: % This loses on `@deftp {Data Type} {struct termios}' -- it thinks the
 3752: % type is just `struct', because we lose the braces in `{struct
 3753: % termios}' when \spacesplit reads its undelimited argument.  Sigh.
 3754: % \let\deftpparsebody=\defvrparsebody
 3755: %
 3756: % So, to get around this, we put \empty in with the type name.  That
 3757: % way, TeX won't find exactly `{...}' as an undelimited argument, and
 3758: % won't strip off the braces.
 3759: %
 3760: \def\deftpparsebody #1#2#3#4 {%
 3761:   \parsebodycommon{#1}{#2}{#3}%
 3762:   \spacesplit{\parsetpheaderline{#3{#4}}}\empty
 3763: }
 3764: 
 3765: % Fine, but then we have to eventually remove the \empty *and* the
 3766: % braces (if any).  That's what this does, putting the result in \tptemp.
 3767: % 
 3768: \def\removeemptybraces\empty#1\relax{\def\tptemp{#1}}%
 3769: 
 3770: % After \spacesplit has done its work, this is called -- #1 is the final
 3771: % thing to call, #2 the type name (which starts with \empty), and #3
 3772: % (which might be empty) the arguments.
 3773: % 
 3774: \def\parsetpheaderline#1#2#3{%
 3775:   \removeemptybraces#2\relax
 3776:   #1{\tptemp}{#3}%
 3777: }%
 3778: 
 3779: \def\defopvarparsebody #1#2#3#4#5 {\begingroup\inENV %
 3780: \medbreak %
 3781: % Define the end token that this defining construct specifies
 3782: % so that it will exit this group.
 3783: \def#1{\endgraf\endgroup\medbreak}%
 3784: \def#2##1 ##2 {\def#4{##1}%
 3785: \begingroup\obeylines\spacesplit{#3{##2}}}%
 3786: \parindent=0in
 3787: \advance\leftskip by \defbodyindent \advance \rightskip by \defbodyindent
 3788: \exdentamount=\defbodyindent
 3789: \begingroup\obeylines\spacesplit{#3{#5}}}
 3790: 
 3791: % Split up #2 at the first space token.
 3792: % call #1 with two arguments:
 3793: %  the first is all of #2 before the space token,
 3794: %  the second is all of #2 after that space token.
 3795: % If #2 contains no space token, all of it is passed as the first arg
 3796: % and the second is passed as empty.
 3797: 
 3798: {\obeylines
 3799: \gdef\spacesplit#1#2^^M{\endgroup\spacesplitfoo{#1}#2 \relax\spacesplitfoo}%
 3800: \long\gdef\spacesplitfoo#1#2 #3#4\spacesplitfoo{%
 3801: \ifx\relax #3%
 3802: #1{#2}{}\else #1{#2}{#3#4}\fi}}
 3803: 
 3804: % So much for the things common to all kinds of definitions.
 3805: 
 3806: % Define @defun.
 3807: 
 3808: % First, define the processing that is wanted for arguments of \defun
 3809: % Use this to expand the args and terminate the paragraph they make up
 3810: 
 3811: \def\defunargs #1{\functionparens \sl
 3812: % Expand, preventing hyphenation at `-' chars.
 3813: % Note that groups don't affect changes in \hyphenchar.
 3814: \hyphenchar\tensl=0
 3815: #1%
 3816: \hyphenchar\tensl=45
 3817: \ifnum\parencount=0 \else \errmessage{unbalanced parens in @def arguments}\fi%
 3818: \interlinepenalty=10000
 3819: \advance\rightskip by 0pt plus 1fil
 3820: \endgraf\penalty 10000\vskip -\parskip\penalty 10000%
 3821: }
 3822: 
 3823: \def\deftypefunargs #1{%
 3824: % Expand, preventing hyphenation at `-' chars.
 3825: % Note that groups don't affect changes in \hyphenchar.
 3826: % Use \boldbraxnoamp, not \functionparens, so that & is not special.
 3827: \boldbraxnoamp
 3828: \tclose{#1}% avoid \code because of side effects on active chars
 3829: \interlinepenalty=10000
 3830: \advance\rightskip by 0pt plus 1fil
 3831: \endgraf\penalty 10000\vskip -\parskip\penalty 10000%
 3832: }
 3833: 
 3834: % Do complete processing of one @defun or @defunx line already parsed.
 3835: 
 3836: % @deffn Command forward-char nchars
 3837: 
 3838: \def\deffn{\defmethparsebody\Edeffn\deffnx\deffnheader}
 3839: 
 3840: \def\deffnheader #1#2#3{\doind {fn}{\code{#2}}%
 3841: \begingroup\defname {#2}{#1}\defunargs{#3}\endgroup %
 3842: \catcode 61=\other % Turn off change made in \defparsebody
 3843: }
 3844: 
 3845: % @defun == @deffn Function
 3846: 
 3847: \def\defun{\defparsebody\Edefun\defunx\defunheader}
 3848: 
 3849: \def\defunheader #1#2{\doind {fn}{\code{#1}}% Make entry in function index
 3850: \begingroup\defname {#1}{Function}%
 3851: \defunargs {#2}\endgroup %
 3852: \catcode 61=\other % Turn off change made in \defparsebody
 3853: }
 3854: 
 3855: % @deftypefun int foobar (int @var{foo}, float @var{bar})
 3856: 
 3857: \def\deftypefun{\defparsebody\Edeftypefun\deftypefunx\deftypefunheader}
 3858: 
 3859: % #1 is the data type.  #2 is the name and args.
 3860: \def\deftypefunheader #1#2{\deftypefunheaderx{#1}#2 \relax}
 3861: % #1 is the data type, #2 the name, #3 the args.
 3862: \def\deftypefunheaderx #1#2 #3\relax{%
 3863: \doind {fn}{\code{#2}}% Make entry in function index
 3864: \begingroup\defname {\defheaderxcond#1\relax$$$#2}{Function}%
 3865: \deftypefunargs {#3}\endgroup %
 3866: \catcode 61=\other % Turn off change made in \defparsebody
 3867: }
 3868: 
 3869: % @deftypefn {Library Function} int foobar (int @var{foo}, float @var{bar})
 3870: 
 3871: \def\deftypefn{\defmethparsebody\Edeftypefn\deftypefnx\deftypefnheader}
 3872: 
 3873: % \defheaderxcond#1\relax$$$
 3874: % puts #1 in @code, followed by a space, but does nothing if #1 is null.
 3875: \def\defheaderxcond#1#2$$${\ifx#1\relax\else\code{#1#2} \fi}
 3876: 
 3877: % #1 is the classification.  #2 is the data type.  #3 is the name and args.
 3878: \def\deftypefnheader #1#2#3{\deftypefnheaderx{#1}{#2}#3 \relax}
 3879: % #1 is the classification, #2 the data type, #3 the name, #4 the args.
 3880: \def\deftypefnheaderx #1#2#3 #4\relax{%
 3881: \doind {fn}{\code{#3}}% Make entry in function index
 3882: \begingroup
 3883: \normalparens % notably, turn off `&' magic, which prevents
 3884: %               at least some C++ text from working
 3885: \defname {\defheaderxcond#2\relax$$$#3}{#1}%
 3886: \deftypefunargs {#4}\endgroup %
 3887: \catcode 61=\other % Turn off change made in \defparsebody
 3888: }
 3889: 
 3890: % @defmac == @deffn Macro
 3891: 
 3892: \def\defmac{\defparsebody\Edefmac\defmacx\defmacheader}
 3893: 
 3894: \def\defmacheader #1#2{\doind {fn}{\code{#1}}% Make entry in function index
 3895: \begingroup\defname {#1}{Macro}%
 3896: \defunargs {#2}\endgroup %
 3897: \catcode 61=\other % Turn off change made in \defparsebody
 3898: }
 3899: 
 3900: % @defspec == @deffn Special Form
 3901: 
 3902: \def\defspec{\defparsebody\Edefspec\defspecx\defspecheader}
 3903: 
 3904: \def\defspecheader #1#2{\doind {fn}{\code{#1}}% Make entry in function index
 3905: \begingroup\defname {#1}{Special Form}%
 3906: \defunargs {#2}\endgroup %
 3907: \catcode 61=\other % Turn off change made in \defparsebody
 3908: }
 3909: 
 3910: % This definition is run if you use @defunx
 3911: % anywhere other than immediately after a @defun or @defunx.
 3912: 
 3913: \def\deffnx #1 {\errmessage{@deffnx in invalid context}}
 3914: \def\defunx #1 {\errmessage{@defunx in invalid context}}
 3915: \def\defmacx #1 {\errmessage{@defmacx in invalid context}}
 3916: \def\defspecx #1 {\errmessage{@defspecx in invalid context}}
 3917: \def\deftypefnx #1 {\errmessage{@deftypefnx in invalid context}}
 3918: \def\deftypeunx #1 {\errmessage{@deftypeunx in invalid context}}
 3919: 
 3920: % @defmethod, and so on
 3921: 
 3922: % @defop {Funny Method} foo-class frobnicate argument
 3923: 
 3924: \def\defop #1 {\def\defoptype{#1}%
 3925: \defopparsebody\Edefop\defopx\defopheader\defoptype}
 3926: 
 3927: \def\defopheader #1#2#3{%
 3928: \dosubind {fn}{\code{#2}}{on #1}% Make entry in function index
 3929: \begingroup\defname {#2}{\defoptype{} on #1}%
 3930: \defunargs {#3}\endgroup %
 3931: }
 3932: 
 3933: % @defmethod == @defop Method
 3934: 
 3935: \def\defmethod{\defmethparsebody\Edefmethod\defmethodx\defmethodheader}
 3936: 
 3937: \def\defmethodheader #1#2#3{%
 3938: \dosubind {fn}{\code{#2}}{on #1}% entry in function index
 3939: \begingroup\defname {#2}{Method on #1}%
 3940: \defunargs {#3}\endgroup %
 3941: }
 3942: 
 3943: % @defcv {Class Option} foo-class foo-flag
 3944: 
 3945: \def\defcv #1 {\def\defcvtype{#1}%
 3946: \defopvarparsebody\Edefcv\defcvx\defcvarheader\defcvtype}
 3947: 
 3948: \def\defcvarheader #1#2#3{%
 3949: \dosubind {vr}{\code{#2}}{of #1}% Make entry in var index
 3950: \begingroup\defname {#2}{\defcvtype{} of #1}%
 3951: \defvarargs {#3}\endgroup %
 3952: }
 3953: 
 3954: % @defivar == @defcv {Instance Variable}
 3955: 
 3956: \def\defivar{\defvrparsebody\Edefivar\defivarx\defivarheader}
 3957: 
 3958: \def\defivarheader #1#2#3{%
 3959: \dosubind {vr}{\code{#2}}{of #1}% Make entry in var index
 3960: \begingroup\defname {#2}{Instance Variable of #1}%
 3961: \defvarargs {#3}\endgroup %
 3962: }
 3963: 
 3964: % These definitions are run if you use @defmethodx, etc.,
 3965: % anywhere other than immediately after a @defmethod, etc.
 3966: 
 3967: \def\defopx #1 {\errmessage{@defopx in invalid context}}
 3968: \def\defmethodx #1 {\errmessage{@defmethodx in invalid context}}
 3969: \def\defcvx #1 {\errmessage{@defcvx in invalid context}}
 3970: \def\defivarx #1 {\errmessage{@defivarx in invalid context}}
 3971: 
 3972: % Now @defvar
 3973: 
 3974: % First, define the processing that is wanted for arguments of @defvar.
 3975: % This is actually simple: just print them in roman.
 3976: % This must expand the args and terminate the paragraph they make up
 3977: \def\defvarargs #1{\normalparens #1%
 3978: \interlinepenalty=10000
 3979: \endgraf\penalty 10000\vskip -\parskip\penalty 10000}
 3980: 
 3981: % @defvr Counter foo-count
 3982: 
 3983: \def\defvr{\defvrparsebody\Edefvr\defvrx\defvrheader}
 3984: 
 3985: \def\defvrheader #1#2#3{\doind {vr}{\code{#2}}%
 3986: \begingroup\defname {#2}{#1}\defvarargs{#3}\endgroup}
 3987: 
 3988: % @defvar == @defvr Variable
 3989: 
 3990: \def\defvar{\defvarparsebody\Edefvar\defvarx\defvarheader}
 3991: 
 3992: \def\defvarheader #1#2{\doind {vr}{\code{#1}}% Make entry in var index
 3993: \begingroup\defname {#1}{Variable}%
 3994: \defvarargs {#2}\endgroup %
 3995: }
 3996: 
 3997: % @defopt == @defvr {User Option}
 3998: 
 3999: \def\defopt{\defvarparsebody\Edefopt\defoptx\defoptheader}
 4000: 
 4001: \def\defoptheader #1#2{\doind {vr}{\code{#1}}% Make entry in var index
 4002: \begingroup\defname {#1}{User Option}%
 4003: \defvarargs {#2}\endgroup %
 4004: }
 4005: 
 4006: % @deftypevar int foobar
 4007: 
 4008: \def\deftypevar{\defvarparsebody\Edeftypevar\deftypevarx\deftypevarheader}
 4009: 
 4010: % #1 is the data type.  #2 is the name.
 4011: \def\deftypevarheader #1#2{%
 4012: \doind {vr}{\code{#2}}% Make entry in variables index
 4013: \begingroup\defname {\defheaderxcond#1\relax$$$#2}{Variable}%
 4014: \interlinepenalty=10000
 4015: \endgraf\penalty 10000\vskip -\parskip\penalty 10000
 4016: \endgroup}
 4017: 
 4018: % @deftypevr {Global Flag} int enable
 4019: 
 4020: \def\deftypevr{\defvrparsebody\Edeftypevr\deftypevrx\deftypevrheader}
 4021: 
 4022: \def\deftypevrheader #1#2#3{\doind {vr}{\code{#3}}%
 4023: \begingroup\defname {\defheaderxcond#2\relax$$$#3}{#1}
 4024: \interlinepenalty=10000
 4025: \endgraf\penalty 10000\vskip -\parskip\penalty 10000
 4026: \endgroup}
 4027: 
 4028: % This definition is run if you use @defvarx
 4029: % anywhere other than immediately after a @defvar or @defvarx.
 4030: 
 4031: \def\defvrx #1 {\errmessage{@defvrx in invalid context}}
 4032: \def\defvarx #1 {\errmessage{@defvarx in invalid context}}
 4033: \def\defoptx #1 {\errmessage{@defoptx in invalid context}}
 4034: \def\deftypevarx #1 {\errmessage{@deftypevarx in invalid context}}
 4035: \def\deftypevrx #1 {\errmessage{@deftypevrx in invalid context}}
 4036: 
 4037: % Now define @deftp
 4038: % Args are printed in bold, a slight difference from @defvar.
 4039: 
 4040: \def\deftpargs #1{\bf \defvarargs{#1}}
 4041: 
 4042: % @deftp Class window height width ...
 4043: 
 4044: \def\deftp{\deftpparsebody\Edeftp\deftpx\deftpheader}
 4045: 
 4046: \def\deftpheader #1#2#3{\doind {tp}{\code{#2}}%
 4047: \begingroup\defname {#2}{#1}\deftpargs{#3}\endgroup}
 4048: 
 4049: % This definition is run if you use @deftpx, etc
 4050: % anywhere other than immediately after a @deftp, etc.
 4051: 
 4052: \def\deftpx #1 {\errmessage{@deftpx in invalid context}}
 4053: 
 4054: 
 4055: \message{cross reference,}
 4056: % Define cross-reference macros
 4057: \newwrite \auxfile
 4058: 
 4059: \newif\ifhavexrefs  % True if xref values are known.
 4060: \newif\ifwarnedxrefs  % True if we warned once that they aren't known.
 4061: 
 4062: % @inforef is simple.
 4063: \def\inforef #1{\inforefzzz #1,,,,**}
 4064: \def\inforefzzz #1,#2,#3,#4**{\putwordSee{} \putwordInfo{} \putwordfile{} \file{\ignorespaces #3{}},
 4065:   node \samp{\ignorespaces#1{}}}
 4066: 
 4067: % \setref{foo} defines a cross-reference point named foo.
 4068: 
 4069: \def\setref#1{%
 4070: \dosetq{#1-title}{Ytitle}%
 4071: \dosetq{#1-pg}{Ypagenumber}%
 4072: \dosetq{#1-snt}{Ysectionnumberandtype}}
 4073: 
 4074: \def\unnumbsetref#1{%
 4075: \dosetq{#1-title}{Ytitle}%
 4076: \dosetq{#1-pg}{Ypagenumber}%
 4077: \dosetq{#1-snt}{Ynothing}}
 4078: 
 4079: \def\appendixsetref#1{%
 4080: \dosetq{#1-title}{Ytitle}%
 4081: \dosetq{#1-pg}{Ypagenumber}%
 4082: \dosetq{#1-snt}{Yappendixletterandtype}}
 4083: 
 4084: % \xref, \pxref, and \ref generate cross-references to specified points.
 4085: % For \xrefX, #1 is the node name, #2 the name of the Info
 4086: % cross-reference, #3 the printed node name, #4 the name of the Info
 4087: % file, #5 the name of the printed manual.  All but the node name can be
 4088: % omitted.
 4089: %
 4090: \def\pxref#1{\putwordsee{} \xrefX[#1,,,,,,,]}
 4091: \def\xref#1{\putwordSee{} \xrefX[#1,,,,,,,]}
 4092: \def\ref#1{\xrefX[#1,,,,,,,]}
 4093: \def\xrefX[#1,#2,#3,#4,#5,#6]{\begingroup
 4094:   \def\printedmanual{\ignorespaces #5}%
 4095:   \def\printednodename{\ignorespaces #3}%
 4096:   \setbox1=\hbox{\printedmanual}%
 4097:   \setbox0=\hbox{\printednodename}%
 4098:   \ifdim \wd0 = 0pt
 4099:     % No printed node name was explicitly given.
 4100:     \expandafter\ifx\csname SETxref-automatic-section-title\endcsname\relax
 4101:       % Use the node name inside the square brackets.
 4102:       \def\printednodename{\ignorespaces #1}%
 4103:     \else
 4104:       % Use the actual chapter/section title appear inside
 4105:       % the square brackets.  Use the real section title if we have it.
 4106:       \ifdim \wd1>0pt%
 4107:         % It is in another manual, so we don't have it.
 4108:         \def\printednodename{\ignorespaces #1}%
 4109:       \else
 4110:         \ifhavexrefs
 4111:           % We know the real title if we have the xref values.
 4112:           \def\printednodename{\refx{#1-title}{}}%
 4113:         \else
 4114:           % Otherwise just copy the Info node name.
 4115:           \def\printednodename{\ignorespaces #1}%
 4116:         \fi%
 4117:       \fi
 4118:     \fi
 4119:   \fi
 4120:   %
 4121:   % If we use \unhbox0 and \unhbox1 to print the node names, TeX does not
 4122:   % insert empty discretionaries after hyphens, which means that it will
 4123:   % not find a line break at a hyphen in a node names.  Since some manuals
 4124:   % are best written with fairly long node names, containing hyphens, this
 4125:   % is a loss.  Therefore, we give the text of the node name again, so it
 4126:   % is as if TeX is seeing it for the first time.
 4127:   \ifdim \wd1 > 0pt
 4128:     \putwordsection{} ``\printednodename'' in \cite{\printedmanual}%
 4129:   \else
 4130:     % _ (for example) has to be the character _ for the purposes of the
 4131:     % control sequence corresponding to the node, but it has to expand
 4132:     % into the usual \leavevmode...\vrule stuff for purposes of
 4133:     % printing. So we \turnoffactive for the \refx-snt, back on for the
 4134:     % printing, back off for the \refx-pg.
 4135:     {\turnoffactive \refx{#1-snt}{}}%
 4136:     \space [\printednodename],\space
 4137:     \turnoffactive \putwordpage\tie\refx{#1-pg}{}%
 4138:   \fi
 4139: \endgroup}
 4140: 
 4141: % \dosetq is the interface for calls from other macros
 4142: 
 4143: % Use \turnoffactive so that punctuation chars such as underscore
 4144: % work in node names.
 4145: \def\dosetq #1#2{{\let\folio=0 \turnoffactive \auxhat%
 4146: \edef\next{\write\auxfile{\internalsetq {#1}{#2}}}%
 4147: \next}}
 4148: 
 4149: % \internalsetq {foo}{page} expands into
 4150: % CHARACTERS 'xrdef {foo}{...expansion of \Ypage...}
 4151: % When the aux file is read, ' is the escape character
 4152: 
 4153: \def\internalsetq #1#2{'xrdef {#1}{\csname #2\endcsname}}
 4154: 
 4155: % Things to be expanded by \internalsetq
 4156: 
 4157: \def\Ypagenumber{\folio}
 4158: 
 4159: \def\Ytitle{\thissection}
 4160: 
 4161: \def\Ynothing{}
 4162: 
 4163: \def\Ysectionnumberandtype{%
 4164: \ifnum\secno=0 \putwordChapter\xreftie\the\chapno %
 4165: \else \ifnum \subsecno=0 \putwordSection\xreftie\the\chapno.\the\secno %
 4166: \else \ifnum \subsubsecno=0 %
 4167: \putwordSection\xreftie\the\chapno.\the\secno.\the\subsecno %
 4168: \else %
 4169: \putwordSection\xreftie\the\chapno.\the\secno.\the\subsecno.\the\subsubsecno %
 4170: \fi \fi \fi }
 4171: 
 4172: \def\Yappendixletterandtype{%
 4173: \ifnum\secno=0 \putwordAppendix\xreftie'char\the\appendixno{}%
 4174: \else \ifnum \subsecno=0 \putwordSection\xreftie'char\the\appendixno.\the\secno %
 4175: \else \ifnum \subsubsecno=0 %
 4176: \putwordSection\xreftie'char\the\appendixno.\the\secno.\the\subsecno %
 4177: \else %
 4178: \putwordSection\xreftie'char\the\appendixno.\the\secno.\the\subsecno.\the\subsubsecno %
 4179: \fi \fi \fi }
 4180: 
 4181: \gdef\xreftie{'tie}
 4182: 
 4183: % Use TeX 3.0's \inputlineno to get the line number, for better error
 4184: % messages, but if we're using an old version of TeX, don't do anything.
 4185: %
 4186: \ifx\inputlineno\thisisundefined
 4187:   \let\linenumber = \empty % Non-3.0.
 4188: \else
 4189:   \def\linenumber{\the\inputlineno:\space}
 4190: \fi
 4191: 
 4192: % Define \refx{NAME}{SUFFIX} to reference a cross-reference string named NAME.
 4193: % If its value is nonempty, SUFFIX is output afterward.
 4194: 
 4195: \def\refx#1#2{%
 4196:   \expandafter\ifx\csname X#1\endcsname\relax
 4197:     % If not defined, say something at least.
 4198:     $\langle$un\-de\-fined$\rangle$%
 4199:     \ifhavexrefs
 4200:       \message{\linenumber Undefined cross reference `#1'.}%
 4201:     \else
 4202:       \ifwarnedxrefs\else
 4203:         \global\warnedxrefstrue
 4204:         \message{Cross reference values unknown; you must run TeX again.}%
 4205:       \fi
 4206:     \fi
 4207:   \else
 4208:     % It's defined, so just use it.
 4209:     \csname X#1\endcsname
 4210:   \fi
 4211:   #2% Output the suffix in any case.
 4212: }
 4213: 
 4214: % Read the last existing aux file, if any.  No error if none exists.
 4215: 
 4216: % This is the macro invoked by entries in the aux file.
 4217: \def\xrdef #1#2{
 4218: {\catcode`\'=\other\expandafter \gdef \csname X#1\endcsname {#2}}}
 4219: 
 4220: \def\readauxfile{%
 4221: \begingroup
 4222: \catcode `\^^@=\other
 4223: \catcode `\=\other
 4224: \catcode `\=\other
 4225: \catcode `\^^C=\other
 4226: \catcode `\^^D=\other
 4227: \catcode `\^^E=\other
 4228: \catcode `\^^F=\other
 4229: \catcode `\^^G=\other
 4230: \catcode `\^^H=\other
 4231: \catcode `\=\other
 4232: \catcode `\^^L=\other
 4233: \catcode `\=\other
 4234: \catcode `\=\other
 4235: \catcode `\=\other
 4236: \catcode `\=\other
 4237: \catcode `\=\other
 4238: \catcode `\=\other
 4239: \catcode `\=\other
 4240: \catcode `\=\other
 4241: \catcode `\=\other
 4242: \catcode `\=\other
 4243: \catcode `\=\other
 4244: \catcode `\=\other
 4245: \catcode 26=\other
 4246: \catcode `\^^[=\other
 4247: \catcode `\^^\=\other
 4248: \catcode `\^^]=\other
 4249: \catcode `\^^^=\other
 4250: \catcode `\^^_=\other
 4251: \catcode `\@=\other
 4252: \catcode `\^=\other
 4253: \catcode `\~=\other
 4254: \catcode `\[=\other
 4255: \catcode `\]=\other
 4256: \catcode`\"=\other
 4257: \catcode`\_=\other
 4258: \catcode`\|=\other
 4259: \catcode`\<=\other
 4260: \catcode`\>=\other
 4261: \catcode `\$=\other
 4262: \catcode `\#=\other
 4263: \catcode `\&=\other
 4264: % `\+ does not work, so use 43.
 4265: \catcode 43=\other
 4266: % Make the characters 128-255 be printing characters
 4267: {%
 4268:   \count 1=128
 4269:   \def\loop{%
 4270:     \catcode\count 1=\other
 4271:     \advance\count 1 by 1
 4272:     \ifnum \count 1<256 \loop \fi
 4273:   }%
 4274: }%
 4275: % the aux file uses ' as the escape.
 4276: % Turn off \ as an escape so we do not lose on
 4277: % entries which were dumped with control sequences in their names.
 4278: % For example, 'xrdef {$\leq $-fun}{page ...} made by @defun ^^
 4279: % Reference to such entries still does not work the way one would wish,
 4280: % but at least they do not bomb out when the aux file is read in.
 4281: \catcode `\{=1 \catcode `\}=2
 4282: \catcode `\%=\other
 4283: \catcode `\'=0
 4284: \catcode`\^=7 % to make ^^e4 etc usable in xref tags 
 4285: \catcode `\\=\other
 4286: \openin 1 \jobname.aux
 4287: \ifeof 1 \else \closein 1 \input \jobname.aux \global\havexrefstrue
 4288: \global\warnedobstrue
 4289: \fi
 4290: % Open the new aux file.  Tex will close it automatically at exit.
 4291: \openout \auxfile=\jobname.aux
 4292: \endgroup}
 4293: 
 4294: 
 4295: % Footnotes.
 4296: 
 4297: \newcount \footnoteno
 4298: 
 4299: % The trailing space in the following definition for supereject is
 4300: % vital for proper filling; pages come out unaligned when you do a
 4301: % pagealignmacro call if that space before the closing brace is
 4302: % removed. (Generally, numeric constants should always be followed by a
 4303: % space to prevent strange expansion errors.)
 4304: \def\supereject{\par\penalty -20000\footnoteno =0 }
 4305: 
 4306: % @footnotestyle is meaningful for info output only..
 4307: \let\footnotestyle=\comment
 4308: 
 4309: \let\ptexfootnote=\footnote
 4310: 
 4311: {\catcode `\@=11
 4312: %
 4313: % Auto-number footnotes.  Otherwise like plain.
 4314: \gdef\footnote{%
 4315:   \global\advance\footnoteno by \@ne
 4316:   \edef\thisfootno{$^{\the\footnoteno}$}%
 4317:   %
 4318:   % In case the footnote comes at the end of a sentence, preserve the
 4319:   % extra spacing after we do the footnote number.
 4320:   \let\@sf\empty
 4321:   \ifhmode\edef\@sf{\spacefactor\the\spacefactor}\/\fi
 4322:   %
 4323:   % Remove inadvertent blank space before typesetting the footnote number.
 4324:   \unskip
 4325:   \thisfootno\@sf
 4326:   \footnotezzz
 4327: }%
 4328: 
 4329: % Don't bother with the trickery in plain.tex to not require the
 4330: % footnote text as a parameter.  Our footnotes don't need to be so general.
 4331: %
 4332: \long\gdef\footnotezzz#1{\insert\footins{%
 4333:   % We want to typeset this text as a normal paragraph, even if the
 4334:   % footnote reference occurs in (for example) a display environment.
 4335:   % So reset some parameters.
 4336:   \interlinepenalty\interfootnotelinepenalty
 4337:   \splittopskip\ht\strutbox % top baseline for broken footnotes
 4338:   \splitmaxdepth\dp\strutbox
 4339:   \floatingpenalty\@MM
 4340:   \leftskip\z@skip
 4341:   \rightskip\z@skip
 4342:   \spaceskip\z@skip
 4343:   \xspaceskip\z@skip
 4344:   \parindent\defaultparindent
 4345:   %
 4346:   % Hang the footnote text off the number.
 4347:   \hang
 4348:   \textindent{\thisfootno}%
 4349:   %
 4350:   % Don't crash into the line above the footnote text.  Since this
 4351:   % expands into a box, it must come within the paragraph, lest it
 4352:   % provide a place where TeX can split the footnote.
 4353:   \footstrut
 4354:   #1\strut}%
 4355: }
 4356: 
 4357: }%end \catcode `\@=11
 4358: 
 4359: % Set the baselineskip to #1, and the lineskip and strut size
 4360: % correspondingly.  There is no deep meaning behind these magic numbers
 4361: % used as factors; they just match (closely enough) what Knuth defined.
 4362: %
 4363: \def\lineskipfactor{.08333}
 4364: \def\strutheightpercent{.70833}
 4365: \def\strutdepthpercent {.29167}
 4366: %
 4367: \def\setleading#1{%
 4368:   \normalbaselineskip = #1\relax
 4369:   \normallineskip = \lineskipfactor\normalbaselineskip
 4370:   \normalbaselines
 4371:   \setbox\strutbox =\hbox{%
 4372:     \vrule width0pt height\strutheightpercent\baselineskip
 4373:                     depth \strutdepthpercent \baselineskip
 4374:   }%
 4375: }
 4376: 
 4377: % @| inserts a changebar to the left of the current line.  It should
 4378: % surround any changed text.  This approach does *not* work if the
 4379: % change spans more than two lines of output.  To handle that, we would
 4380: % have adopt a much more difficult approach (putting marks into the main
 4381: % vertical list for the beginning and end of each change).
 4382: %
 4383: \def\|{%
 4384:   % \vadjust can only be used in horizontal mode.
 4385:   \leavevmode
 4386:   %
 4387:   % Append this vertical mode material after the current line in the output.
 4388:   \vadjust{%
 4389:     % We want to insert a rule with the height and depth of the current
 4390:     % leading; that is exactly what \strutbox is supposed to record.
 4391:     \vskip-\baselineskip
 4392:     %
 4393:     % \vadjust-items are inserted at the left edge of the type.  So
 4394:     % the \llap here moves out into the left-hand margin.
 4395:     \llap{%
 4396:       %
 4397:       % For a thicker or thinner bar, change the `1pt'.
 4398:       \vrule height\baselineskip width1pt
 4399:       %
 4400:       % This is the space between the bar and the text.
 4401:       \hskip 12pt
 4402:     }%
 4403:   }%
 4404: }
 4405: 
 4406: % For a final copy, take out the rectangles
 4407: % that mark overfull boxes (in case you have decided
 4408: % that the text looks ok even though it passes the margin).
 4409: %
 4410: \def\finalout{\overfullrule=0pt}
 4411: 
 4412: 
 4413: % End of control word definitions.
 4414: 
 4415: \message{and turning on texinfo input format.}
 4416: 
 4417: \def\openindices{%
 4418:    \newindex{cp}%
 4419:    \newcodeindex{fn}%
 4420:    \newcodeindex{vr}%
 4421:    \newcodeindex{tp}%
 4422:    \newcodeindex{ky}%
 4423:    \newcodeindex{pg}%
 4424: }
 4425: 
 4426: % Set some numeric style parameters, for 8.5 x 11 format.
 4427: 
 4428: \hsize = 6in
 4429: \hoffset = .25in
 4430: \newdimen\defaultparindent \defaultparindent = 15pt
 4431: \parindent = \defaultparindent
 4432: \parskip 3pt plus 2pt minus 1pt
 4433: \setleading{13.2pt}
 4434: \advance\topskip by 1.2cm
 4435: 
 4436: \chapheadingskip = 15pt plus 4pt minus 2pt
 4437: \secheadingskip = 12pt plus 3pt minus 2pt
 4438: \subsecheadingskip = 9pt plus 2pt minus 2pt
 4439: 
 4440: % Prevent underfull vbox error messages.
 4441: \vbadness=10000
 4442: 
 4443: % Following George Bush, just get rid of widows and orphans.
 4444: \widowpenalty=10000
 4445: \clubpenalty=10000
 4446: 
 4447: % Use TeX 3.0's \emergencystretch to help line breaking, but if we're
 4448: % using an old version of TeX, don't do anything.  We want the amount of
 4449: % stretch added to depend on the line length, hence the dependence on
 4450: % \hsize.  This makes it come to about 9pt for the 8.5x11 format.
 4451: %
 4452: \ifx\emergencystretch\thisisundefined
 4453:   % Allow us to assign to \emergencystretch anyway.
 4454:   \def\emergencystretch{\dimen0}%
 4455: \else
 4456:   \emergencystretch = \hsize
 4457:   \divide\emergencystretch by 45
 4458: \fi
 4459: 
 4460: % Use @smallbook to reset parameters for 7x9.5 format  (or else 7x9.25)
 4461: \def\smallbook{
 4462:   \global\chapheadingskip = 15pt plus 4pt minus 2pt
 4463:   \global\secheadingskip = 12pt plus 3pt minus 2pt
 4464:   \global\subsecheadingskip = 9pt plus 2pt minus 2pt
 4465:   %
 4466:   \global\lispnarrowing = 0.3in
 4467:   \setleading{12pt}
 4468:   \advance\topskip by -1cm
 4469:   \global\parskip 2pt plus 1pt
 4470:   \global\hsize = 5in
 4471:   \global\vsize=7.5in
 4472:   \global\tolerance=700
 4473:   \global\hfuzz=1pt
 4474:   \global\contentsrightmargin=0pt
 4475:   \global\deftypemargin=0pt
 4476:   \global\defbodyindent=.5cm
 4477:   %
 4478:   \global\pagewidth=\hsize
 4479:   \global\pageheight=\vsize
 4480:   %
 4481:   \global\let\smalllisp=\smalllispx
 4482:   \global\let\smallexample=\smalllispx
 4483:   \global\def\Esmallexample{\Esmalllisp}
 4484: }
 4485: 
 4486: % Use @afourpaper to print on European A4 paper.
 4487: \def\afourpaper{
 4488: \global\tolerance=700
 4489: \global\hfuzz=1pt
 4490: \setleading{12pt}
 4491: \global\parskip 15pt plus 1pt
 4492: 
 4493: \global\vsize= 53\baselineskip
 4494: \advance\vsize by \topskip
 4495: %\global\hsize=   5.85in     % A4 wide 10pt
 4496: \global\hsize=  6.5in
 4497: \global\outerhsize=\hsize
 4498: \global\advance\outerhsize by 0.5in
 4499: \global\outervsize=\vsize
 4500: \global\advance\outervsize by 0.6in
 4501: 
 4502: \global\pagewidth=\hsize
 4503: \global\pageheight=\vsize
 4504: }
 4505: 
 4506: \bindingoffset=0pt
 4507: \normaloffset=\hoffset
 4508: \pagewidth=\hsize
 4509: \pageheight=\vsize
 4510: 
 4511: % Allow control of the text dimensions.  Parameters in order: textheight;
 4512: % textwidth; voffset; hoffset; binding offset; topskip.
 4513: % All require a dimension;
 4514: % header is additional; added length extends the bottom of the page.
 4515: 
 4516: \def\changepagesizes#1#2#3#4#5#6{
 4517:  \global\vsize= #1
 4518:  \global\topskip= #6
 4519:  \advance\vsize by \topskip
 4520:  \global\voffset= #3
 4521:  \global\hsize= #2
 4522:  \global\outerhsize=\hsize
 4523:  \global\advance\outerhsize by 0.5in
 4524:  \global\outervsize=\vsize
 4525:  \global\advance\outervsize by 0.6in
 4526:  \global\pagewidth=\hsize
 4527:  \global\pageheight=\vsize
 4528:  \global\normaloffset= #4
 4529:  \global\bindingoffset= #5}
 4530: 
 4531: % A specific text layout, 24x15cm overall, intended for A4 paper.  Top margin
 4532: % 29mm, hence bottom margin 28mm, nominal side margin 3cm.
 4533: \def\afourlatex
 4534:         {\global\tolerance=700
 4535:         \global\hfuzz=1pt
 4536:         \setleading{12pt}
 4537:         \global\parskip 15pt plus 1pt
 4538:         \advance\baselineskip by 1.6pt
 4539:         \changepagesizes{237mm}{150mm}{3.6mm}{3.6mm}{3mm}{7mm}
 4540:         }
 4541: 
 4542: % Use @afourwide to print on European A4 paper in wide format.
 4543: \def\afourwide{\afourpaper
 4544: \changepagesizes{9.5in}{6.5in}{\hoffset}{\normaloffset}{\bindingoffset}{7mm}}
 4545: 
 4546: % Define macros to output various characters with catcode for normal text.
 4547: \catcode`\"=\other
 4548: \catcode`\~=\other
 4549: \catcode`\^=\other
 4550: \catcode`\_=\other
 4551: \catcode`\|=\other
 4552: \catcode`\<=\other
 4553: \catcode`\>=\other
 4554: \catcode`\+=\other
 4555: \def\normaldoublequote{"}
 4556: \def\normaltilde{~}
 4557: \def\normalcaret{^}
 4558: \def\normalunderscore{_}
 4559: \def\normalverticalbar{|}
 4560: \def\normalless{<}
 4561: \def\normalgreater{>}
 4562: \def\normalplus{+}
 4563: 
 4564: % This macro is used to make a character print one way in ttfont
 4565: % where it can probably just be output, and another way in other fonts,
 4566: % where something hairier probably needs to be done.
 4567: %
 4568: % #1 is what to print if we are indeed using \tt; #2 is what to print
 4569: % otherwise.  Since all the Computer Modern typewriter fonts have zero
 4570: % interword stretch (and shrink), and it is reasonable to expect all
 4571: % typewriter fonts to have this, we can check that font parameter.
 4572: %
 4573: \def\ifusingtt#1#2{\ifdim \fontdimen3\the\font=0pt #1\else #2\fi}
 4574: 
 4575: % Turn off all special characters except @
 4576: % (and those which the user can use as if they were ordinary).
 4577: % Most of these we simply print from the \tt font, but for some, we can
 4578: % use math or other variants that look better in normal text.
 4579: 
 4580: \catcode`\"=\active
 4581: \def\activedoublequote{{\tt \char '042}}
 4582: \let"=\activedoublequote
 4583: \catcode`\~=\active
 4584: \def~{{\tt \char '176}}
 4585: \chardef\hat=`\^
 4586: \catcode`\^=\active
 4587: \def\auxhat{\def^{'hat}}
 4588: \def^{{\tt \hat}}
 4589: 
 4590: \catcode`\_=\active
 4591: \def_{\ifusingtt\normalunderscore\_}
 4592: % Subroutine for the previous macro.
 4593: \def\_{\leavevmode \kern.06em \vbox{\hrule width.3em height.1ex}}
 4594: 
 4595: \catcode`\|=\active
 4596: \def|{{\tt \char '174}}
 4597: \chardef \less=`\<
 4598: \catcode`\<=\active
 4599: \def<{{\tt \less}}
 4600: \chardef \gtr=`\>
 4601: \catcode`\>=\active
 4602: \def>{{\tt \gtr}}
 4603: \catcode`\+=\active
 4604: \def+{{\tt \char 43}}
 4605: %\catcode 27=\active
 4606: %\def^^[{$\diamondsuit$}
 4607: 
 4608: % Set up an active definition for =, but don't enable it most of the time.
 4609: {\catcode`\==\active
 4610: \global\def={{\tt \char 61}}}
 4611: 
 4612: \catcode`+=\active
 4613: \catcode`\_=\active
 4614: 
 4615: % If a .fmt file is being used, characters that might appear in a file
 4616: % name cannot be active until we have parsed the command line.
 4617: % So turn them off again, and have \everyjob (or @setfilename) turn them on.
 4618: % \otherifyactive is called near the end of this file.
 4619: \def\otherifyactive{\catcode`+=\other \catcode`\_=\other}
 4620: 
 4621: \catcode`\@=0
 4622: 
 4623: % \rawbackslashxx output one backslash character in current font
 4624: \global\chardef\rawbackslashxx=`\\
 4625: %{\catcode`\\=\other
 4626: %@gdef@rawbackslashxx{\}}
 4627: 
 4628: % \rawbackslash redefines \ as input to do \rawbackslashxx.
 4629: {\catcode`\\=\active
 4630: @gdef@rawbackslash{@let\=@rawbackslashxx }}
 4631: 
 4632: % \normalbackslash outputs one backslash in fixed width font.
 4633: \def\normalbackslash{{\tt\rawbackslashxx}}
 4634: 
 4635: % Say @foo, not \foo, in error messages.
 4636: \escapechar=`\@
 4637: 
 4638: % \catcode 17=0   % Define control-q
 4639: \catcode`\\=\active
 4640: 
 4641: % Used sometimes to turn off (effectively) the active characters
 4642: % even after parsing them.
 4643: @def@turnoffactive{@let"=@normaldoublequote
 4644: @let\=@realbackslash
 4645: @let~=@normaltilde
 4646: @let^=@normalcaret
 4647: @let_=@normalunderscore
 4648: @let|=@normalverticalbar
 4649: @let<=@normalless
 4650: @let>=@normalgreater
 4651: @let+=@normalplus}
 4652: 
 4653: @def@normalturnoffactive{@let"=@normaldoublequote
 4654: @let\=@normalbackslash
 4655: @let~=@normaltilde
 4656: @let^=@normalcaret
 4657: @let_=@normalunderscore
 4658: @let|=@normalverticalbar
 4659: @let<=@normalless
 4660: @let>=@normalgreater
 4661: @let+=@normalplus}
 4662: 
 4663: % Make _ and + \other characters, temporarily.
 4664: % This is canceled by @fixbackslash.
 4665: @otherifyactive
 4666: 
 4667: % If a .fmt file is being used, we don't want the `\input texinfo' to show up.
 4668: % That is what \eatinput is for; after that, the `\' should revert to printing
 4669: % a backslash.
 4670: %
 4671: @gdef@eatinput input texinfo{@fixbackslash}
 4672: @global@let\ = @eatinput
 4673: 
 4674: % On the other hand, perhaps the file did not have a `\input texinfo'. Then
 4675: % the first `\{ in the file would cause an error. This macro tries to fix
 4676: % that, assuming it is called before the first `\' could plausibly occur.
 4677: % Also back turn on active characters that might appear in the input
 4678: % file name, in case not using a pre-dumped format.
 4679: %
 4680: @gdef@fixbackslash{@ifx\@eatinput @let\ = @normalbackslash @fi
 4681:   @catcode`+=@active @catcode`@_=@active}
 4682: 
 4683: %% These look ok in all fonts, so just make them not special.  The @rm below
 4684: %% makes sure that the current font starts out as the newly loaded cmr10
 4685: @catcode`@$=@other @catcode`@%=@other @catcode`@&=@other @catcode`@#=@other
 4686: 
 4687: @textfonts
 4688: @rm
 4689: 
 4690: @c Local variables:
 4691: @c page-delimiter: "^\\\\message"
 4692: @c End:

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