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-rw-r--r--macros/eplain/tex/arrow.tex597
-rw-r--r--macros/eplain/tex/btxmac.tex929
-rw-r--r--macros/eplain/tex/eplain.aux3
-rw-r--r--macros/eplain/tex/eplain.ini6
-rw-r--r--macros/eplain/tex/eplain.tex4135
5 files changed, 5670 insertions, 0 deletions
diff --git a/macros/eplain/tex/arrow.tex b/macros/eplain/tex/arrow.tex
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+++ b/macros/eplain/tex/arrow.tex
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+% arrow.tex: macros for commutative diagrams.
+%
+% Copyright (C) 1991,1992 Steven T. Smith.
+% stsmith@ll.mit.edu
+%
+% This program is free software; you can redistribute it and/or modify
+% it under the terms of the GNU General Public License as published by
+% the Free Software Foundation; either version 2, or (at your option)
+% any later version.
+%
+% This program is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+% GNU General Public License for more details.
+%
+% You should have received a copy of the GNU General Public License
+% along with this file; see the file COPYING. If not, write to the
+% Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+% Boston, MA 02110-1301, USA.
+%
+% As a special exception, when this file is read by TeX when
+% processing a TeX source document, you may use the result without
+% restriction.
+
+% Version 0 Released for alpha testing, November 16, 1991.
+% Version 0.1 Morphism positions for slanted lines improved, Nov. 17, 1991.
+% Version 0.11 \biline changed to \bisline for compatible naming. 11/21/91
+% Version 0.2 Equate \lft & \rt w. _ and ^ instead of L_{12} & R_{12}. 1/20/92
+% Version 1.0 Distributed with Eplain. 1/20/92
+% Version 1.1 Purged \newcount's, etc.; Warner ref.; \getch@nnel logic. 4/21/92
+% Version 1.11 Replace \smash with \smash@@ (for amstex compatibility) 3/27/96
+
+
+
+% Syntax: \[arrow](X,Y) or
+% \[arrow](X,Y)\lft{MOR} (morphism placed left of arrow) or
+% \[arrow](X,Y)\rt{MOR} (morphism placed right of arrow)
+%
+% [arrow] is one of
+% sline (straight line)
+% dotline (dotted line) * Unimplemented
+% arrow (straight arrow)
+% dotarrow (dotted arrow) * Unimplemented
+%
+% The following allow plain versions and some combination of \lft and \rt.
+% biarrow (two straight arrows)
+% adjarrow (two adjoint arrows)
+% bisline (two straight lines)
+%
+% Also, for left, right, up, and down mappings:
+%
+% \mapright (or \mapright^{f_*}, \mapright_{f_*})
+% \mapleft (ditto)
+% \mapup (use \rt and \lft as above)
+% \mapdown (ditto)
+%
+% And variants of these (can use combinations of ^/_ and lft/rt):
+%
+% \bimapright (two right arrows)
+% \bimapleft (two left arrows)
+% \adjmapright (two adjoint arrows; <- over ->)
+% \adjmapleft (two adjoint arrows; -> over <-)
+% \hline (horizontal line)
+% \dothline (dotted horizontal line) * Unimplemented
+% \bihline (two horizontal lines)
+%
+% \bimapdown (two down arrows)
+% \bimapup (two left arrows)
+% \adjmapdown (two adjoint arrows; down then up)
+% \adjmapup (two adjoint arrows; up then down)
+% \vline (vertical line)
+% \dotvline (dotted vertical line) * Unimplemented
+% \bivline (two vertical lines)
+
+% Use \thinlines temporarily to find the current catcode of @, so we can
+% restore it at the end.
+\edef\thinlines{\the\catcode`@ }%
+\catcode`@ = 11
+\let\@oldatcatcode = \thinlines
+
+
+% I changed \smash to \smash@@ in these macros to avoid AMSTEX conflict.
+
+\def\smash@@{\relax % \relax, in case this comes first in \halign
+ \ifmmode\def\next{\mathpalette\mathsm@sh}\else\let\next\makesm@sh
+ \fi\next}
+\def\makesm@sh#1{\setbox\z@\hbox{#1}\finsm@sh}
+\def\mathsm@sh#1#2{\setbox\z@\hbox{$\m@th#1{#2}$}\finsm@sh}
+\def\finsm@sh{\ht\z@\z@ \dp\z@\z@ \box\z@}
+
+% Adapted LaTeX code for drawing lines and vectors
+
+% Note: to ensure compatibility with LaTeX, all LaTeX control
+% sequences have been renamed. Control sequence names containing the
+% at sign (@) have been changed to contain an ampersand (&) instead.
+\edef\@oldandcatcode{\the\catcode`& }%
+\catcode`& = 11
+
+% LaTeX macros changed here:
+% \line - changed to \drawline
+% \vector - changed to \drawvector
+% \@badlinearg - simply uses \errmessage now
+% \@height, \@width, and \@depth are changed to height, width, and depth
+% \@sline and \@svector - changed so that \hbox{\drawline...} yields
+% a box of positive width and positive height for a positive slope
+% and positive depth for a negative slope.
+% \@hline and \@hvector - likewise
+% \unitlength eliminated; pass dimensions to \drawline and \drawvector.
+
+% LaTeX's while loop
+\def\&whilenoop#1{}%
+\def\&whiledim#1\do #2{\ifdim #1\relax#2\&iwhiledim{#1\relax#2}\fi}%
+\def\&iwhiledim#1{\ifdim #1\let\&nextwhile=\&iwhiledim
+ \else\let\&nextwhile=\&whilenoop\fi\&nextwhile{#1}}%
+
+% LaTeX's \line and \vector macros:
+\newif\if&negarg
+\newdimen\&wholewidth
+\newdimen\&halfwidth
+
+\font\tenln=line10
+
+\def\thinlines{\let\&linefnt\tenln \let\&circlefnt\tencirc
+ \&wholewidth\fontdimen8\tenln \&halfwidth .5\&wholewidth}%
+\def\thicklines{\let\&linefnt\tenlnw \let\&circlefnt\tencircw
+ \&wholewidth\fontdimen8\tenlnw \&halfwidth .5\&wholewidth}%
+
+\def\drawline(#1,#2)#3{\&xarg #1\relax \&yarg #2\relax \&linelen=#3\relax
+ \ifnum\&xarg =0 \&vline \else \ifnum\&yarg =0 \&hline \else \&sline\fi\fi}%
+
+\def\&sline{\leavevmode
+ \ifnum\&xarg< 0 \&negargtrue \&xarg -\&xarg \&yyarg -\&yarg
+ \else \&negargfalse \&yyarg \&yarg \fi
+ \ifnum \&yyarg >0 \&tempcnta\&yyarg \else \&tempcnta -\&yyarg \fi
+ \ifnum\&tempcnta>6 \&badlinearg \&yyarg0 \fi
+ \ifnum\&xarg>6 \&badlinearg \&xarg1 \fi
+ \setbox\&linechar\hbox{\&linefnt\&getlinechar(\&xarg,\&yyarg)}%
+ \ifnum \&yyarg >0 \let\&upordown\raise \&clnht\z@
+ \else\let\&upordown\lower \&clnht \ht\&linechar\fi
+ \&clnwd=\wd\&linechar
+ \&whiledim \&clnwd <\&linelen \do {%
+ \&upordown\&clnht\copy\&linechar
+ \advance\&clnht \ht\&linechar
+ \advance\&clnwd \wd\&linechar
+ }%
+ \advance\&clnht -\ht\&linechar
+ \advance\&clnwd -\wd\&linechar
+ \&tempdima\&linelen\advance\&tempdima -\&clnwd
+ \&tempdimb\&tempdima\advance\&tempdimb -\wd\&linechar
+ \hskip\&tempdimb \multiply\&tempdima \@m
+ \&tempcnta \&tempdima \&tempdima \wd\&linechar \divide\&tempcnta \&tempdima
+ \&tempdima \ht\&linechar \multiply\&tempdima \&tempcnta
+ \divide\&tempdima \@m
+ \advance\&clnht \&tempdima
+ \ifdim \&linelen <\wd\&linechar \hskip \wd\&linechar
+ \else\&upordown\&clnht\copy\&linechar\fi}%
+
+\def\&hline{\vrule height \&halfwidth depth \&halfwidth width \&linelen}%
+
+\def\&getlinechar(#1,#2){\&tempcnta#1\relax\multiply\&tempcnta 8
+ \advance\&tempcnta -9 \ifnum #2>0 \advance\&tempcnta #2\relax\else
+ \advance\&tempcnta -#2\relax\advance\&tempcnta 64 \fi
+ \char\&tempcnta}%
+
+\def\drawvector(#1,#2)#3{\&xarg #1\relax \&yarg #2\relax
+ \&tempcnta \ifnum\&xarg<0 -\&xarg\else\&xarg\fi
+ \ifnum\&tempcnta<5\relax \&linelen=#3\relax
+ \ifnum\&xarg =0 \&vvector \else \ifnum\&yarg =0 \&hvector
+ \else \&svector\fi\fi\else\&badlinearg\fi}%
+
+\def\&hvector{\ifnum\&xarg<0 \rlap{\&linefnt\&getlarrow(1,0)}\fi \&hline
+ \ifnum\&xarg>0 \llap{\&linefnt\&getrarrow(1,0)}\fi}%
+
+\def\&vvector{\ifnum \&yarg <0 \&downvector \else \&upvector \fi}%
+
+\def\&svector{\&sline
+ \&tempcnta\&yarg \ifnum\&tempcnta <0 \&tempcnta=-\&tempcnta\fi
+ \ifnum\&tempcnta <5
+ \if&negarg\ifnum\&yarg>0 % 3d quadrant; dp > 0
+ \llap{\lower\ht\&linechar\hbox to\&linelen{\&linefnt
+ \&getlarrow(\&xarg,\&yyarg)\hss}}\else % 4th quadrant; ht > 0
+ \llap{\hbox to\&linelen{\&linefnt\&getlarrow(\&xarg,\&yyarg)\hss}}\fi
+ \else\ifnum\&yarg>0 % 1st quadrant; ht > 0
+ \&tempdima\&linelen \multiply\&tempdima\&yarg
+ \divide\&tempdima\&xarg \advance\&tempdima-\ht\&linechar
+ \raise\&tempdima\llap{\&linefnt\&getrarrow(\&xarg,\&yyarg)}\else
+ \&tempdima\&linelen \multiply\&tempdima-\&yarg % 2d quadrant; dp > 0
+ \divide\&tempdima\&xarg
+ \lower\&tempdima\llap{\&linefnt\&getrarrow(\&xarg,\&yyarg)}\fi\fi
+ \else\&badlinearg\fi}%
+
+\def\&getlarrow(#1,#2){\ifnum #2 =\z@ \&tempcnta='33\else
+\&tempcnta=#1\relax\multiply\&tempcnta \sixt@@n \advance\&tempcnta
+-9 \&tempcntb=#2\relax\multiply\&tempcntb \tw@
+\ifnum \&tempcntb >0 \advance\&tempcnta \&tempcntb\relax
+\else\advance\&tempcnta -\&tempcntb\advance\&tempcnta 64
+\fi\fi\char\&tempcnta}%
+
+\def\&getrarrow(#1,#2){\&tempcntb=#2\relax
+\ifnum\&tempcntb < 0 \&tempcntb=-\&tempcntb\relax\fi
+\ifcase \&tempcntb\relax \&tempcnta='55 \or
+\ifnum #1<3 \&tempcnta=#1\relax\multiply\&tempcnta
+24 \advance\&tempcnta -6 \else \ifnum #1=3 \&tempcnta=49
+\else\&tempcnta=58 \fi\fi\or
+\ifnum #1<3 \&tempcnta=#1\relax\multiply\&tempcnta
+24 \advance\&tempcnta -3 \else \&tempcnta=51\fi\or
+\&tempcnta=#1\relax\multiply\&tempcnta
+\sixt@@n \advance\&tempcnta -\tw@ \else
+\&tempcnta=#1\relax\multiply\&tempcnta
+\sixt@@n \advance\&tempcnta 7 \fi\ifnum #2<0 \advance\&tempcnta 64 \fi
+\char\&tempcnta}%
+
+\def\&vline{\ifnum \&yarg <0 \&downline \else \&upline\fi}%
+
+\def\&upline{\hbox to \z@{\hskip -\&halfwidth \vrule width \&wholewidth
+ height \&linelen depth \z@\hss}}%
+
+\def\&downline{\hbox to \z@{\hskip -\&halfwidth \vrule width \&wholewidth
+ height \z@ depth \&linelen \hss}}%
+
+\def\&upvector{\&upline\setbox\&tempboxa\hbox{\&linefnt\char'66}\raise
+ \&linelen \hbox to\z@{\lower \ht\&tempboxa\box\&tempboxa\hss}}%
+
+\def\&downvector{\&downline\lower \&linelen
+ \hbox to \z@{\&linefnt\char'77\hss}}%
+
+\def\&badlinearg{\errmessage{Bad \string\arrow\space argument.}}%
+
+%INITIALIZATION
+\thinlines
+
+% Allocate registers using the rules of p.~346 of {\sl The \TeX book}.
+\countdef\&xarg 0
+\countdef\&yarg 2
+\countdef\&yyarg 4
+\countdef\&tempcnta 6
+\countdef\&tempcntb 8
+
+\dimendef\&linelen 0
+\dimendef\&clnwd 2
+\dimendef\&clnht 4
+\dimendef\&tempdima 6
+\dimendef\&tempdimb 8
+
+\chardef\@arrbox 0
+\chardef\&linechar 2
+\chardef\&tempboxa 2 % \&linechar and \&tempboxa don't interfere.
+
+
+% Macros for abstract nonsense
+
+% Macros for slanted lines and arrows.
+
+\let\lft^%
+\let\rt_% distinguish between \rt and \lft
+
+\newif\if@pslope % test for positive slope
+\def\@findslope(#1,#2){\ifnum#1>0
+ \ifnum#2>0 \@pslopetrue \else\@pslopefalse\fi \else
+ \ifnum#2>0 \@pslopefalse \else\@pslopetrue\fi\fi}%
+
+\def\generalsmap(#1,#2){\getm@rphposn(#1,#2)\plnmorph\futurelet\next\addm@rph}%
+
+% Put arrow in \@arrbox, then add morphisms later.
+
+% Single lines and arrows.
+\def\sline(#1,#2){\setbox\@arrbox=\hbox{\drawline(#1,#2){\sarrowlength}}%
+ \@findslope(#1,#2)\d@@blearrfalse\generalsmap(#1,#2)}%
+\def\arrow(#1,#2){\setbox\@arrbox=\hbox{\drawvector(#1,#2){\sarrowlength}}%
+ \@findslope(#1,#2)\d@@blearrfalse\generalsmap(#1,#2)}%
+
+% Double lines, arrows, and adjoint arrows.
+\newif\ifd@@blearr
+
+\def\bisline(#1,#2){\@findslope(#1,#2)%
+ \if@pslope \let\@upordown\raise \else \let\@upordown\lower\fi
+ \getch@nnel(#1,#2)\setbox\@arrbox=\hbox{\@upordown\@vchannel
+ \rlap{\drawline(#1,#2){\sarrowlength}}%
+ \hskip\@hchannel\hbox{\drawline(#1,#2){\sarrowlength}}}%
+ \d@@blearrtrue\generalsmap(#1,#2)}%
+\def\biarrow(#1,#2){\@findslope(#1,#2)%
+ \if@pslope \let\@upordown\raise \else \let\@upordown\lower\fi
+ \getch@nnel(#1,#2)\setbox\@arrbox=\hbox{\@upordown\@vchannel
+ \rlap{\drawvector(#1,#2){\sarrowlength}}%
+ \hskip\@hchannel\hbox{\drawvector(#1,#2){\sarrowlength}}}%
+ \d@@blearrtrue\generalsmap(#1,#2)}%
+\def\adjarrow(#1,#2){\@findslope(#1,#2)%
+ \if@pslope \let\@upordown\raise \else \let\@upordown\lower\fi
+ \getch@nnel(#1,#2)\setbox\@arrbox=\hbox{\@upordown\@vchannel
+ \rlap{\drawvector(#1,#2){\sarrowlength}}%
+ \hskip\@hchannel\hbox{\drawvector(-#1,-#2){\sarrowlength}}}%
+ \d@@blearrtrue\generalsmap(#1,#2)}%
+
+% Morphism placement.
+
+% Logic for positioning morphisms on slanted arrows:
+% If \lft then
+% \hskip by -\@hmorphdflt
+% if \@pslopetrue then \raise by \@vmorphdflt
+% else \lower by \@vmorphdflt
+% Else if \rt then
+% \hskip by \@hmorphdflt
+% if \@pslopetrue then \lower by \@vmorphdflt
+% else \raise by \@vmorphdflt
+%
+% \@hmorphdflt and \@vmorphdflt defined by \getm@rphposn
+% Advance \morphdist by .5\channelwidth if double arrows
+%
+% Use \@shiftmorph to allow users to move morphisms
+
+% Logic for \@shiftmorph:
+% If \rtm@rph then
+% if \hmorphposnrt=0 then hshift by\hmorphposn else hshift by\hmorphposnrt
+% if \vmorphposnrt=0 then vshift by\vmorphposn else vshift by\vmorphposnrt
+% Else
+% if \hmorphposnlft=0 then hshift by\hmorphposn else hshift by\hmorphposnlft
+% if \vmorphposnlft=0 then vshift by\vmorphposn else vshift by\vmorphposnlft
+
+\newif\ifrtm@rph
+\def\@shiftmorph#1{\hbox{\setbox0=\hbox{$\scriptstyle#1$}%
+ \setbox1=\hbox{\hskip\@hm@rphshift\raise\@vm@rphshift\copy0}%
+ \wd1=\wd0 \ht1=\ht0 \dp1=\dp0 \box1}}%
+\def\@hm@rphshift{\ifrtm@rph
+ \ifdim\hmorphposnrt=\z@\hmorphposn\else\hmorphposnrt\fi \else
+ \ifdim\hmorphposnlft=\z@\hmorphposn\else\hmorphposnlft\fi \fi}%
+\def\@vm@rphshift{\ifrtm@rph
+ \ifdim\vmorphposnrt=\z@\vmorphposn\else\vmorphposnrt\fi \else
+ \ifdim\vmorphposnlft=\z@\vmorphposn\else\vmorphposnlft\fi \fi}%
+
+\def\addm@rph{\ifx\next\lft\let\temp=\lftmorph\else
+ \ifx\next\rt\let\temp=\rtmorph\else\let\temp\relax\fi\fi \temp}%
+
+\def\plnmorph{\dimen1\wd\@arrbox \ifdim\dimen1<\z@ \dimen1-\dimen1\fi
+ \vcenter{\box\@arrbox}}%
+\def\lftmorph\lft#1{\rtm@rphfalse \setbox0=\@shiftmorph{#1}%
+ \if@pslope \let\@upordown\raise \else \let\@upordown\lower\fi
+ \llap{\@upordown\@vmorphdflt\hbox to\dimen1{\hss % \dimen1=\wd\@arrbox
+ \llap{\box0}\hss}\hskip\@hmorphdflt}\futurelet\next\addm@rph}%
+\def\rtmorph\rt#1{\rtm@rphtrue \setbox0=\@shiftmorph{#1}%
+ \if@pslope \let\@upordown\lower \else \let\@upordown\raise\fi
+ \llap{\@upordown\@vmorphdflt\hbox to\dimen1{\hss
+ \rlap{\box0}\hss}\hskip-\@hmorphdflt}\futurelet\next\addm@rph}%
+
+% Get appropriate shifts for morphisms and double lines at various slopes
+% Syntax e.g.: \@getshift(1,2){\@hchannel}{\@vchannel}{\channelwidth}%
+
+\def\getm@rphposn(#1,#2){\ifd@@blearr \dimen@\morphdist \advance\dimen@ by
+ .5\channelwidth \@getshift(#1,#2){\@hmorphdflt}{\@vmorphdflt}{\dimen@}\else
+ \@getshift(#1,#2){\@hmorphdflt}{\@vmorphdflt}{\morphdist}\fi}%
+
+\def\getch@nnel(#1,#2){\ifdim\hchannel=\z@ \ifdim\vchannel=\z@
+ \@getshift(#1,#2){\@hchannel}{\@vchannel}{\channelwidth}%
+ \else \@hchannel\hchannel \@vchannel\vchannel \fi
+ \else \@hchannel\hchannel \@vchannel\vchannel \fi}%
+
+\def\@getshift(#1,#2)#3#4#5{\dimen@ #5\relax
+ \&xarg #1\relax \&yarg #2\relax
+ \ifnum\&xarg<0 \&xarg -\&xarg \fi
+ \ifnum\&yarg<0 \&yarg -\&yarg \fi
+ \ifnum\&xarg<\&yarg \&negargtrue \&yyarg\&xarg \&xarg\&yarg \&yarg\&yyarg\fi
+ \ifcase\&xarg \or % There is no case 0
+ \ifcase\&yarg % case 1
+ \dimen@i \z@ \dimen@ii \dimen@ \or % case (1,0)
+ \dimen@i .7071\dimen@ \dimen@ii .7071\dimen@ \fi \or
+ \ifcase\&yarg % case 2
+ \or % case 0,2 wrong
+ \dimen@i .4472\dimen@ \dimen@ii .8944\dimen@ \fi \or
+ \ifcase\&yarg % case 3
+ \or % case 0,3 wrong
+ \dimen@i .3162\dimen@ \dimen@ii .9486\dimen@ \or
+ \dimen@i .5547\dimen@ \dimen@ii .8321\dimen@ \fi \or
+ \ifcase\&yarg % case 4
+ \or % case 0,2,4 wrong
+ \dimen@i .2425\dimen@ \dimen@ii .9701\dimen@ \or\or
+ \dimen@i .6\dimen@ \dimen@ii .8\dimen@ \fi \or
+ \ifcase\&yarg % case 5
+ \or % case 0,5 wrong
+ \dimen@i .1961\dimen@ \dimen@ii .9801\dimen@ \or
+ \dimen@i .3714\dimen@ \dimen@ii .9284\dimen@ \or
+ \dimen@i .5144\dimen@ \dimen@ii .8575\dimen@ \or
+ \dimen@i .6247\dimen@ \dimen@ii .7801\dimen@ \fi \or
+ \ifcase\&yarg % case 6
+ \or % case 0,2,3,4,6 wrong
+ \dimen@i .1645\dimen@ \dimen@ii .9864\dimen@ \or\or\or\or
+ \dimen@i .6402\dimen@ \dimen@ii .7682\dimen@ \fi \fi
+ \if&negarg \&tempdima\dimen@i \dimen@i\dimen@ii \dimen@ii\&tempdima\fi
+ #3\dimen@i\relax #4\dimen@ii\relax }%
+
+\catcode`\&=4 % Back to alignment tab
+
+
+% Macros for horizontal and vertical lines and arrows.
+% These macros use an idea from Appendix~D, p.~374 of the Texbook.
+% Usage: `\mapright^f', `\mapleft', etc.
+% `\mapdown\lft{f}', `\mapup\rt{g}', `\mapdown', etc.
+
+% \toks@ will contain the token sequence that defines the arrow and morphisms;
+% ensure that \toks@={\mathop{\vcenter{\smash@@{horiz. arrow}}}\limits} to start.
+\def\generalhmap{\futurelet\next\@generalhmap}%
+\def\@generalhmap{\ifx\next^ \let\temp\generalhm@rph\else
+ \ifx\next_ \let\temp\generalhm@rph\else \let\temp\m@kehmap\fi\fi \temp}%
+\def\generalhm@rph#1#2{\ifx#1^
+ \toks@=\expandafter{\the\toks@#1{\rtm@rphtrue\@shiftmorph{#2}}}\else
+ \toks@=\expandafter{\the\toks@#1{\rtm@rphfalse\@shiftmorph{#2}}}\fi
+ \generalhmap}%
+\def\m@kehmap{\mathrel{\smash@@{\the\toks@}}}%
+
+\def\mapright{\toks@={\mathop{\vcenter{\smash@@{\drawrightarrow}}}\limits}%
+ \generalhmap}%
+\def\mapleft{\toks@={\mathop{\vcenter{\smash@@{\drawleftarrow}}}\limits}%
+ \generalhmap}%
+\def\bimapright{\toks@={\mathop{\vcenter{\smash@@{\drawbirightarrow}}}\limits}%
+ \generalhmap}%
+\def\bimapleft{\toks@={\mathop{\vcenter{\smash@@{\drawbileftarrow}}}\limits}%
+ \generalhmap}%
+\def\adjmapright{\toks@={\mathop{\vcenter{\smash@@{\drawadjrightarrow}}}\limits}%
+ \generalhmap}%
+\def\adjmapleft{\toks@={\mathop{\vcenter{\smash@@{\drawadjleftarrow}}}\limits}%
+ \generalhmap}%
+\def\hline{\toks@={\mathop{\vcenter{\smash@@{\drawhline}}}\limits}%
+ \generalhmap}%
+\def\bihline{\toks@={\mathop{\vcenter{\smash@@{\drawbihline}}}\limits}%
+ \generalhmap}%
+
+\def\drawrightarrow{\hbox{\drawvector(1,0){\harrowlength}}}%
+\def\drawleftarrow{\hbox{\drawvector(-1,0){\harrowlength}}}%
+\def\drawbirightarrow{\hbox{\raise.5\channelwidth
+ \hbox{\drawvector(1,0){\harrowlength}}\lower.5\channelwidth
+ \llap{\drawvector(1,0){\harrowlength}}}}%
+\def\drawbileftarrow{\hbox{\raise.5\channelwidth
+ \hbox{\drawvector(-1,0){\harrowlength}}\lower.5\channelwidth
+ \llap{\drawvector(-1,0){\harrowlength}}}}%
+\def\drawadjrightarrow{\hbox{\raise.5\channelwidth
+ \hbox{\drawvector(-1,0){\harrowlength}}\lower.5\channelwidth
+ \llap{\drawvector(1,0){\harrowlength}}}}%
+\def\drawadjleftarrow{\hbox{\raise.5\channelwidth
+ \hbox{\drawvector(1,0){\harrowlength}}\lower.5\channelwidth
+ \llap{\drawvector(-1,0){\harrowlength}}}}%
+\def\drawhline{\hbox{\drawline(1,0){\harrowlength}}}%
+\def\drawbihline{\hbox{\raise.5\channelwidth
+ \hbox{\drawline(1,0){\harrowlength}}\lower.5\channelwidth
+ \llap{\drawline(1,0){\harrowlength}}}}%
+
+% Vertical arrows are handled differently because there is no \mathop.
+% \toks@ will contain the token sequence that defines the arrow and morphisms;
+% ensure that \toks@={\vcenter{vertical arrow}} to start.
+\def\generalvmap{\futurelet\next\@generalvmap}%
+\def\@generalvmap{\ifx\next\lft \let\temp\generalvm@rph\else
+ \ifx\next\rt \let\temp\generalvm@rph\else \let\temp\m@kevmap\fi\fi \temp}%
+% Prepend or append to \toks@ depending on \rt or \lft.
+\toksdef\toks@@=1
+\def\generalvm@rph#1#2{\ifx#1\rt % append
+ \toks@=\expandafter{\the\toks@
+ \rlap{$\vcenter{\rtm@rphtrue\@shiftmorph{#2}}$}}\else % prepend
+ \toks@@={\llap{$\vcenter{\rtm@rphfalse\@shiftmorph{#2}}$}}%
+ \toks@=\expandafter\expandafter\expandafter{\expandafter\the\expandafter
+ \toks@@ \the\toks@}\fi \generalvmap}%
+\def\m@kevmap{\the\toks@}%
+
+\def\mapdown{\toks@={\vcenter{\drawdownarrow}}\generalvmap}%
+\def\mapup{\toks@={\vcenter{\drawuparrow}}\generalvmap}%
+\def\bimapdown{\toks@={\vcenter{\drawbidownarrow}}\generalvmap}%
+\def\bimapup{\toks@={\vcenter{\drawbiuparrow}}\generalvmap}%
+\def\adjmapdown{\toks@={\vcenter{\drawadjdownarrow}}\generalvmap}%
+\def\adjmapup{\toks@={\vcenter{\drawadjuparrow}}\generalvmap}%
+\def\vline{\toks@={\vcenter{\drawvline}}\generalvmap}%
+\def\bivline{\toks@={\vcenter{\drawbivline}}\generalvmap}%
+
+\def\drawdownarrow{\hbox to5pt{\hss\drawvector(0,-1){\varrowlength}\hss}}%
+\def\drawuparrow{\hbox to5pt{\hss\drawvector(0,1){\varrowlength}\hss}}%
+\def\drawbidownarrow{\hbox to5pt{\hss\hbox{\drawvector(0,-1){\varrowlength}}%
+ \hskip\channelwidth\hbox{\drawvector(0,-1){\varrowlength}}\hss}}%
+\def\drawbiuparrow{\hbox to5pt{\hss\hbox{\drawvector(0,1){\varrowlength}}%
+ \hskip\channelwidth\hbox{\drawvector(0,1){\varrowlength}}\hss}}%
+\def\drawadjdownarrow{\hbox to5pt{\hss\hbox{\drawvector(0,-1){\varrowlength}}%
+ \hskip\channelwidth\lower\varrowlength
+ \hbox{\drawvector(0,1){\varrowlength}}\hss}}%
+\def\drawadjuparrow{\hbox to5pt{\hss\hbox{\drawvector(0,1){\varrowlength}}%
+ \hskip\channelwidth\raise\varrowlength
+ \hbox{\drawvector(0,-1){\varrowlength}}\hss}}%
+\def\drawvline{\hbox to5pt{\hss\drawline(0,1){\varrowlength}\hss}}%
+\def\drawbivline{\hbox to5pt{\hss\hbox{\drawline(0,1){\varrowlength}}%
+ \hskip\channelwidth\hbox{\drawline(0,1){\varrowlength}}\hss}}%
+
+
+% Macros for setting commutative diagrams.
+
+% A macro inspired by Ex.~18.46 of the TeXbook.
+\def\commdiag#1{\null\,
+ \vcenter{\commdiagbaselines
+ \m@th\ialign{\hfil$##$\hfil&&\hfil$\mkern4mu ##$\hfil\crcr
+ \mathstrut\crcr\noalign{\kern-\baselineskip}
+ #1\crcr\mathstrut\crcr\noalign{\kern-\baselineskip}}}\,}%
+
+\def\commdiagbaselines{\baselineskip15pt \lineskip3pt \lineskiplimit3pt }%
+% A macro inspired by Francis Borceux's Diagram macros for LaTeX
+% (FBORCEUX@BUCLLN11.BITNET).
+\def\gridcommdiag#1{\null\,
+ \vcenter{\offinterlineskip
+ \m@th\ialign{&\vbox to\vgrid{\vss
+ \hbox to\hgrid{\hss\smash@@{$##$}\hss}}\crcr
+ \mathstrut\crcr\noalign{\kern-\vgrid}
+ #1\crcr\mathstrut\crcr\noalign{\kern-.5\vgrid}}}\,}%
+
+% Default parameters
+% Define default heights and widths for arrows using the golden ratio.
+% Note that 5:3 (for sline) and 3:2 (for vector) approximate this ratio.
+\newdimen\harrowlength \harrowlength=60pt
+\newdimen\varrowlength \varrowlength=.618\harrowlength
+\newdimen\sarrowlength \sarrowlength=\harrowlength
+
+% Morphism placement
+\newdimen\hmorphposn \hmorphposn=\z@
+\newdimen\vmorphposn \vmorphposn=\z@
+\newdimen\morphdist \morphdist=4pt
+
+\dimendef\@hmorphdflt 0 % These two dimensions are
+\dimendef\@vmorphdflt 2 % defined by \getm@rphposn
+
+\newdimen\hmorphposnrt \hmorphposnrt=\z@
+\newdimen\hmorphposnlft \hmorphposnlft=\z@
+\newdimen\vmorphposnrt \vmorphposnrt=\z@
+\newdimen\vmorphposnlft \vmorphposnlft=\z@
+\let\hmorphposnup=\hmorphposnrt
+\let\hmorphposndn=\hmorphposnlft
+\let\vmorphposnup=\vmorphposnrt
+\let\vmorphposndn=\vmorphposnlft
+
+% Default grid size for \gridcommdiag
+\newdimen\hgrid \hgrid=15pt
+\newdimen\vgrid \vgrid=15pt
+
+% Horizontal and vertical distance between double lines and arrows.
+\newdimen\hchannel \hchannel=0pt
+\newdimen\vchannel \vchannel=0pt
+\newdimen\channelwidth \channelwidth=3pt
+
+\dimendef\@hchannel 0 % Defined via the
+\dimendef\@vchannel 2 % macro \getch@nnel
+
+\catcode`& = \@oldandcatcode
+\catcode`@ = \@oldatcatcode
+
+
+% Some examples
+
+%\parskip=20pt
+%
+%The first example:
+%$$\commdiag{A&\mapright^f&B&\mapleft^g&C\cr
+%\mapdown\lft\psi&\arrow(3,-2)\rt s&\mapup\rt\phi&
+%\arrow(-3,2)\lft l&\mapdown\rt\theta\cr
+%D&\mapright_h&E&\mapleft_{\int_0^t{\bf A}\,d\sigma}&F\cr}$$
+%
+%
+%Covering homotopy property (Bott and Tu, {\it Differential Forms in
+%Algebraic Topology}):
+%$$\commdiag{Y&\mapright^f&E\cr \mapdown&\arrow(3,2)\lft{f_t}&\mapdown\cr
+%Y\times I&\mapright^{\bar f_t}&X}$$
+%
+%
+%Universal mapping property (Warner, {\it Foundations of Differentiable
+%Manifolds and Lie Groups}): $$\varrowlength=20pt
+%\commdiag{V\otimes W\cr \mapup\lft\phi&\arrow(3,-1)\rt{\tilde l}\cr
+%V\times W&\mapright^l&U\cr}$$
+%
+%
+%A cube (Francis Borceux):
+%$$\harrowlength=48pt \varrowlength=48pt \sarrowlength=20pt
+%\def\cross#1#2{\setbox0=\hbox{$#1$}%
+% \hbox to\wd0{\hss\hbox{$#2$}\hss}\llap{\unhbox0}}
+%\gridcommdiag{&&B&&\mapright^b&&D\cr
+%&\arrow(1,1)\lft a&&&&\arrow(1,1)\lft d\cr
+%A&&\cross{\hmorphposn=12pt\mapright^c}{\vmorphposn=-12pt\mapdown\lft f}
+%&&C&&\mapdown\rt h\cr\cr
+%\mapdown\lft e&&F&&\cross{\hmorphposn=-12pt\mapright_j}
+%{\vmorphposn=12pt\mapdown\rt g}&&H\cr
+%&\arrow(1,1)\lft i&&&&\arrow(1,1)\rt l\cr
+%E&&\mapright_k&&G\cr}$$
+%
+%Zassenhaus's Butterfly Lemma (Lang, {\it Algebra}):
+%$$\hgrid=16pt \vgrid=8pt \sarrowlength=32pt
+%\def\cross#1#2{\setbox0=\hbox{$#1$}%
+% \hbox to\wd0{\hss\hbox{$#2$}\hss}\llap{\unhbox0}}
+%\def\l#1{\llap{$#1$\hskip.5em}}
+%\def\r#1{\rlap{\hskip.5em$#1$}}
+%\gridcommdiag{&&U&&&&V\cr &&\bullet&&&&\bullet\cr
+%&&\sarrowlength=16pt\sline(0,1)&&&&\sarrowlength=16pt\sline(0,1)\cr
+%&&\l{u(U\cap V)}\bullet&&&&\bullet\r{(U\cap V)v}\cr
+%&&&\sline(2,-1)&&\sline(2,1)\cr
+%&&\cross{=}{\sline(0,1)}&&\bullet&&\cross{=}{\sline(0,1)}\cr\cr
+%&&\l{^{\textstyle u(U\cap v)}}\bullet&&\cross{=}{\sline(0,1)}&&
+% \bullet\r{^{\textstyle(u\cap V)v}}\cr
+%&\sline(2,1)&&\sline(2,-1)&&\sline(2,1)&&\sline(2,-1)\cr
+%\l{u}\bullet&&&&\bullet&&&&\bullet\r{v}\cr
+%&\sline(2,-1)&&\sline(2,1)&&\sline(2,-1)&&\sline(2,1)\cr
+%&&\bullet&&&&\bullet\cr &&u\cap V&&&&U\cap v\cr}$$
diff --git a/macros/eplain/tex/btxmac.tex b/macros/eplain/tex/btxmac.tex
new file mode 100644
index 0000000000..9fd3e20415
--- /dev/null
+++ b/macros/eplain/tex/btxmac.tex
@@ -0,0 +1,929 @@
+%% @texfile{
+%% author = "Karl Berry and Oren Patashnik",
+%% version = "0.99p",
+%% date = "30 May 2019",
+%% filename = "btxmac.tex",
+%% address = "tex-eplain@tug.org",
+%% supported = "yes",
+%% docstring = "Defines macros that make BibTeX work with plain TeX",
+%% }
+% BibTeX-for-TeX macros for BibTeX 0.99c, TeX 3.0 or later.
+% Copyright 1990, 1991, 1992, 1995, 2005, 2007, 2013, 2016, 2019 Karl Berry &
+% Oren Patashnik.
+%
+% Unlimited copying and redistribution of this file are permitted as
+% long as this file is not modified. Modifications (and redistribution
+% thereof) are permitted, but only if the resulting file is not named
+% btxmac.tex.
+%
+% This file contains TeX macros that allow BibTeX, a bibliography
+% program that was originally designed for use with LaTeX, to work with
+% plain TeX. Please report any bugs (outright goofs, improvable macros,
+% misfeatures, or unclear documentation) to Oren Patashnik
+% (opbibtex@cs.stanford.edu). These macros will become frozen shortly
+% after BibTeX version 1.00 is released.
+%
+% AMS-TEX WARNING: We tried very hard, as of version .99i of these macros,
+% to make them compatible with AmS-TeX. We succeeded to the extent
+% that, if you use one of the standard bibliography styles, you probably
+% won't notice any problems with version 0.99i of btxmac.tex. But
+% ultimately we failed, in that the inherent incompatibilities between
+% plain TeX and AmS-TeX kept making these macros break, for certain
+% inputs or certain styles. Examples: (1) AmS-TeX treats at-signs as
+% special, in ways that plain TeX and LaTeX don't, so that, for example,
+% you can't have any `@' characters in an argument to the \cite command,
+% the way you can in TeX or LaTeX; (2) AmS-TeX decided that plain TeX's
+% and LaTeX's macron-accent control sequence `\=' should be undefined;
+% so you'll need to define `\=' to be `\B' to get the xampl.bib example
+% suggested below to work with AmS-TeX; (3) AmS-TeX redefines the tie
+% character `~' of plain TeX, and AmS-TeX's `amsppt' style redefines
+% plain TeX's `\nobreak' macro, so that if you use an author-date style
+% like `apalike' and you have a multiple-author reference for which the
+% author-date style automatically produces a citation in the text like
+% `(Jones et~al., 1992)' you will throw AmS-TeX's `amsppt' style into
+% an infinite loop, exceeding its input stack size.
+%
+% In practice, such incompatibilities surface infrequently; but it is
+% now clear to us that it's not worth the effort (perhaps it's not even
+% possible) to make the btxmac.tex macros robust when used both with
+% plain TeX and Ams-TeX. If the BibTeX/AmS-TeX results attainable with
+% the current btxmac.tex macros are sufficient, fine. But if there's a
+% demand for more robust BibTeX/AmS-TeX behavior, then someone who's
+% very familiar with the AmS-TeX package should probably make an
+% amsbtxmc.tex version of the macros. Until then, if you're an AmS-TeX
+% user, or a LaTeX or plain TeX user sharing files with an AmS-TeX user,
+% beware.
+% END OF AMS-TEX WARNING.
+%
+% To use these macros you should be familiar with how BibTeX interacts
+% with LaTeX, since BibTeX's interaction with TeX is very similar; that
+% interaction is explained in the LaTeX manual. It also helps to
+% have read "BibTeXing", the documentation that accompanies BibTeX.
+%
+% Then, if you want, you should redefine any of the macros that begin
+% with `\bbl' or `\biblabel' or `\print' that you need to get formatting
+% different from the default (the default settings are designed to
+% accompany a bibliography style like BibTeX's standard style `plain').
+% The macros you might want to change are described briefly a few
+% paragraphs hence.
+%
+% To get started without reading any documentation, try running the
+% short .tex file below through TeX and BibTeX.
+%
+% Remember the general scheme: Running (La)TeX writes information on the
+% .aux (auxiliary) file; then running BibTeX reads information from the
+% .aux, .bst (style), and .bib (database) files, and writes information
+% (the bibliography) on a .bbl file; then running (La)TeX incorporates
+% the bibliography; then running (La)TeX once more fixes the remaining
+% forward references into the bibliography. Thus, to get everything
+% incorporated into your output, you'll have to run (La)TeX, BibTeX,
+% (La)TeX, (La)TeX. (Standup, sitdown, fight, fight, fight.)
+%
+% These macros can stand alone or they can be \input into a macro
+% package, like Eplain, that is sufficiently compatible with plain TeX.
+% To use these macros to format the 0.99 version of the xampl.bib file
+% that's distributed with BibTeX (that version of the file has no
+% self-identification), you'll need to define \mbox, which is a LaTeX
+% command, to be \hbox, as in the example below.
+%
+% Here's an eight-line plain TeX file for trying out btxmac.tex; of course
+% you'll have to remove the comment characters at the beginning of each
+% line, and, depending on your system, you might have to take steps so
+% that BibTeX can "see" the files xampl.bib and plain.bst (BibTeX will
+% give you two empty-field warning messages that you should ignore).
+%
+% \input btxmac
+% \noindent This cites Aamport's gnominious article~\cite{article-full}.
+% \medskip
+% \leftline{\bf References}
+% \nocite{*} % put all database entries into the reference list
+% \bibliographystyle{plain} % specify plain.bst as the style file
+% \bibliography{xampl} % specify the database files; here, just xampl.bib
+% \bye
+%
+%
+% HISTORY
+%
+% Karl Berry wrote the original version of these macros in 1989 and
+% 1990, for use in his `Eplain' package. Oren Patashnik modified them
+% slightly in July 1990, as part of the official BibTeX distribution.
+%
+% 1-Aug-90 Version 0.99a, not released to the general public.
+% 14-Aug-90 0.99b, first general release.
+% 26-Aug-90 0.99c, made \@undefinedmessage work with other macro packages.
+% 6-Sep-90 0.99d, allowed for general formatting of bibliography labels,
+% for general formatting of (in-text) citations, and for
+% changing certain catcodes while reading the .aux file.
+% 14-Nov-90 0.99e, changed the way \@setletters works, made some \new...'s
+% non-outer, and changed the way Eplain reads this file.
+% 12-Dec-90 0.99f, made \@resetnumerals change the `,' and `.' catcodes; and
+% added \biblabelextrahang, \@getoptionalarg, and \bblsc.
+% 11-Mar-91 0.99g, made a few minor changes required by the way Eplain reads
+% this file, but no functional changes.
+% 24-Apr-91 0.99h, inhibited the reading and writing of the .aux file if it
+% isn't used or if the \noauxfile macro is defined, and
+% removed some .aux-file-opening detritus; printed the
+% cite-key of undefined citations in \tt font; changed the
+% catcode of `_' inside \cite; and called \@resetnumerals
+% from inside a group.
+% 29-Feb-92 0.99i, made these macros semi-compatible with AmS-TeX; removed
+% \@resetnumerals, \@setletters, \@tokstostring, and
+% friends; changed the way \cite handles catcodes; changed
+% \@getoptionalarg, and had \bibitem and \newcommand use
+% it; added \@futurenonspacelet and (to facilitate the use
+% of multiple reference lists) \bblfilebasename; changed
+% \biblabelprint to use the new macros \biblabelprecontents
+% and \biblabelpostcontents, and to, by default, right-
+% justify numeric labels; and renamed \biblabelextrahang to
+% the more descriptive \biblabelextraspace.
+% 14-Mar-92 0.99j, made 0.99i's use of `\\' local to btxmac.tex.
+% 13-Nov-95 0.99k, defined \begin and \end (while reading bbl file) only if
+% it wasn't already defined.
+% 11-Aug-03 0.99l, defined \renewcommand and \providecommand, since some AMS
+% style files use them. Also defined \emph, \textbf, and
+% \mbox, since many .bib files use them. This version was
+% never actually released, but these changes appear
+% starting with 0.99k-18aug05.
+% 18-Aug-05 0.99k-18aug05, made the \em, \emph, etc., definitions effective
+% only if not already defined. Provided
+% \printcite{pre,post}item, \bblitemhook.
+% 09-Sep-07 0.99k-09sep07, executed \@citedef in a group to avoid potential
+% save-stack overflow.
+% 07-Feb-13 0.99m, made \newcommand and \providecommand be \long, and not
+% use \edef. Defined \bbltextbf.
+% 30-Sep-13 0.99n, made \@futurenonspacelet be \long,
+% renamed \@optionaltemp to \@optionalusercs,
+% ignored spaces after the optional argument.
+% 12-May-16 0.99o, renamed \@newcommand and others to \@btx..., to avoid
+% conflict with Babel's file plain.def.
+% 30-May-19 0.99p, one missed rename of \@continuenewcommand to \@btx...,
+% that made \providecommand fail.
+%
+% The LaTeX-related commands defined in this file include
+% (a) the four commands that a user types (\bibliography,
+% \bibliographystyle, \cite, and \nocite);
+% (b) three commands that BibTeX looks for in the .aux
+% file (\bibdata, \bibstyle, and \citation---there is a fourth command
+% that BibTeX looks for, but that command is related to LaTeX's \include
+% facility, so these macros ignore that command); and
+% (c) the LaTeX commands (\newcommand, \renewcommand, \providecommand)
+% that are written by a standard (alpha) or AMS bibliography style.
+% (d) a few more LaTeX commands (\emph, \mbox, \textbf) which many .bib
+% files use.
+%
+% The definitions here are not the same as the corresponding LaTeX
+% definitions (those LaTeX definitions depend on a significant fraction
+% of LaTeX itself). But the only significant differences are with the
+% \*command macros, which in LaTeX (a) give warnings in various
+% circumstances; (b) allow a second optional argument; and (c) make the
+% defined control sequences \long. The versions here don't do any of
+% those things.
+%
+% To summarize: Unless you know what you're doing, you shouldn't define
+% any control sequences with these ten names:
+%
+% \bibdata
+% \bibliography
+% \bibliographystyle
+% \bibstyle
+% \citation
+% \cite
+% \newcommand
+% \nocite
+% \providecommand
+% \renewcommand
+%
+% There are other commands written by one or more of the four standard
+% (plain, abbrv, alpha, unsrt) or four semistandard (acm, apalike,
+% ieeetr, siam) bibliography styles, or commonly used in .bib files.
+% These take effect only within the bibliography, and are redefinable,
+% as explained later:
+%
+% \em
+% \emph
+% \mbox
+% \newblock
+% \sc
+% \textbf
+%
+% There's one control sequence you might want to use (but not redefine)
+% in redefining \biblabelprint:
+%
+% \biblabelwidth
+%
+% There are fifteen other control sequences (explained later in more detail)
+% that the macros of this file will use if you define them---you should
+% define them after the \input btxmac command but before the \bibliography
+% command. The first six begin with `\bbl' and affect fonts, spacing,
+% perhaps other characteristics of the bibliography, and which .bbl files
+% get read; the next five begin with `\biblabel' and determine how labels
+% are formatted in the bibliography; and the last four begin with `\print'
+% and determine how the in-text citations are formatted:
+%
+% \bblem
+% \bblfilebasename
+% \bblhook
+% \bblnewblock
+% \bblrm
+% \bblsc
+% \biblabelcontents
+% \biblabelprecontents
+% \biblabelprint
+% \biblabelpostcontents
+% \biblabelextraspace
+% \printbetweencitations
+% \printcitefinish
+% \printcitenote
+% \printcitestart
+%
+% If it's defined before the \input btxmac command, the control sequence
+% below inhibits the reading and writing of the .aux file(s), and the
+% issuing of related warning messages. Any definition will do. This
+% feature might help when you're working on draft stages of a document:
+%
+% \noauxfile
+%
+%
+% Here's another control sequence (it's described later) that you
+% probably won't want to redefine unless you are writing another macro
+% package; if you do redefine it, however, do it before the \input btxmac
+% command (and notice that it has an `@' in its name):
+%
+% \@undefinedmessage
+%
+% Any other control sequence in this file that might conflict with
+% something you've defined will have an `@' in its name, so such conflicts
+% are unlikely; but if you're worried about a specific control sequence
+% name, do a text search of this file to look for it.
+%
+%
+% So to start things off we turn `@' into a letter (category code 11),
+% keeping track of the old category code for future restoration.
+% (Simply resetting it to 12 when we leave these macros is
+% insufficient.) We use `\cite' as a temporary control sequence to
+% save the current catcode of @ to avoid possibly overwriting something
+% (without an `@' in its name) that might already be defined.
+%
+\edef\cite{\the\catcode`@}%
+\catcode`@ = 11
+\let\@oldatcatcode = \cite
+\chardef\@letter = 11
+\chardef\@other = 12
+%
+%
+% Next come some things that will be useful later.
+%
+% Make an outer definition into an inner one (due to Chris Thompson).
+% The arguments should be the control sequence to be defined, and the
+% new of the \outer control sequence, as characters; the control
+% sequence #1 is defined to be just the same as \csname#2\endcsname, but
+% not \outer. For example, \@innerdef\innernewcount{newcount} would
+% define \innernewcount to be a non-outer version of \newcount.
+%
+\def\@innerdef#1#2{\edef#1{\expandafter\noexpand\csname #2\endcsname}}%
+%
+% We use \@innerdef to make some of our allocations local, because
+% Eplain includes our code inside a conditional. We put @'s in the
+% names to minimize the (already small) chance of conflicts.
+%
+\@innerdef\@innernewcount{newcount}%
+\@innerdef\@innernewdimen{newdimen}%
+\@innerdef\@innernewif{newif}%
+\@innerdef\@innernewwrite{newwrite}%
+%
+%
+% Swallow one parameter.
+%
+\def\@gobble#1{}%
+%
+%
+% Use TeX 3.0's \inputlineno to get the line number, for better error
+% messages, but if we're using an old version of TeX, don't do anything.
+%
+\ifx\inputlineno\@undefined
+ \let\@linenumber = \empty % Pre-3.0.
+\else
+ \def\@linenumber{\the\inputlineno:\space}%
+\fi
+%
+%
+% The following macro \@futurenonspacelet (from the TeXbook) behaves
+% essentially like \futurelet except that it discards any implicit or
+% explicit space tokens that intervene before a nonspace is scanned:
+%
+\long\def\@futurenonspacelet#1{\def\cs{#1}%
+ \afterassignment\@stepone\let\@nexttoken=
+}%
+\begingroup % The grouping here avoids stepping on an outside use of `\\'.
+\def\\{\global\let\@stoken= }%
+\\ % now \@stoken is a space token (\\ is a control symbol, so that
+ % space after it is seen).
+\endgroup
+\def\@stepone{\expandafter\futurelet\cs\@steptwo}%
+\def\@steptwo{\expandafter\ifx\cs\@stoken\let\@@next=\@stepthree
+ \else\let\@@next=\@nexttoken\fi \@@next}%
+\def\@stepthree{\afterassignment\@stepone\let\@@next= }%
+%
+%
+% \@getoptionalarg\CS gets an optional argument from the input, enclosed
+% in brackets, then expands \CS. We set \@optionalarg to \empty if we
+% don't find one, otherwise to the text of the argument. This assumes
+% the brackets don't have a funny category code.
+%
+\def\@getoptionalarg#1{%
+ \let\@optionalusercs = #1%
+ \let\@optionalnext = \relax
+ \@futurenonspacelet\@optionalnext\@bracketcheck
+}%
+%
+% The \expandafter's in this macro let us avoid the use of \aftergroup,
+% which is somewhat more expensive.
+%
+\def\@bracketcheck{%
+ \ifx [\@optionalnext
+ \expandafter\@@getoptionalarg % we have an optional arg
+ \else
+ \let\@optionalarg = \empty % no optional arg
+ \expandafter\@optionalusercs
+ \fi
+}%
+%
+% Get the next bracketed text.
+\def\@@getoptionalarg[#1]{%
+ \def\@optionalarg{#1}%
+ % Ignore spaces after the optional arg, too.
+ % (We don't actually need to peek ahead, but this is the easiest way
+ % to ignore the spaces.)
+ \let\@optdummy=\relax % just in case it has become \outer somehow
+ \@futurenonspacelet\@optdummy\@optionalusercs
+}%
+%
+%
+% From LaTeX.
+%
+\def\@nnil{\@nil}%
+\def\@fornoop#1\@@#2#3{}%
+%
+\def\@for#1:=#2\do#3{%
+ \edef\@fortmp{#2}%
+ \ifx\@fortmp\empty \else
+ \expandafter\@forloop#2,\@nil,\@nil\@@#1{#3}%
+ \fi
+}%
+%
+\def\@forloop#1,#2,#3\@@#4#5{\def#4{#1}\ifx #4\@nnil \else
+ #5\def#4{#2}\ifx #4\@nnil \else#5\@iforloop #3\@@#4{#5}\fi\fi
+}%
+%
+\def\@iforloop#1,#2\@@#3#4{\def#3{#1}\ifx #3\@nnil
+ \let\@nextwhile=\@fornoop \else
+ #4\relax\let\@nextwhile=\@iforloop\fi\@nextwhile#2\@@#3{#4}%
+}%
+%
+%
+% This macro tests if a file \jobname.#1 exists, and sets \if@fileexists
+% appropriately. If an optional argument is given, it is used as the
+% root part of the filename instead of \jobname.
+%
+\@innernewif\if@fileexists
+%
+\def\@testfileexistence{\@getoptionalarg\@finishtestfileexistence}%
+\def\@finishtestfileexistence#1{%
+ \begingroup
+ \def\extension{#1}%
+ \immediate\openin0 =
+ \ifx\@optionalarg\empty\jobname\else\@optionalarg\fi
+ \ifx\extension\empty \else .#1\fi
+ \space
+ \ifeof 0
+ \global\@fileexistsfalse
+ \else
+ \global\@fileexiststrue
+ \fi
+ \immediate\closein0
+ \endgroup
+}%
+%
+%
+%% [[[start of BibTeX-specific stuff]]]
+%
+% Now come the four main LaTeX commands and their associated .aux
+% commands. Just as in LaTeX, \bibliographystyle defines the BibTeX
+% style name (.bst file, that is), and \bibliography defines the
+% database (.bib) file(s). The corresponding .aux-file commands are
+% \bibstyle and \bibdata, which are there only for BibTeX's (but not
+% LaTeX's) use.
+%
+\def\bibliographystyle#1{%
+ \@readauxfile
+ \@writeaux{\string\bibstyle{#1}}%
+}%
+\let\bibstyle = \@gobble
+%
+% As well as writing the \bibdata command to tell BibTeX which .bib
+% files to read, we read the .bbl file that BibTeX (or a person,
+% conceivably) has produced. We use \bblfilebasename as the root of the
+% filename to read; this defaults to \jobname.
+%
+\let\bblfilebasename = \jobname
+\def\bibliography#1{%
+ \@readauxfile
+ \@writeaux{\string\bibdata{#1}}%
+ \@testfileexistence[\bblfilebasename]{bbl}%
+ \if@fileexists
+ % We just output a non-discardable item (the `whatsit' with the
+ % \bibdata command). This means that the glue that will be
+ % inserted next (\parskip or \baselineskip, most likely) will be a
+ % legal breakpoint. Most likely, this is after some kind of
+ % heading, where we don't want to allow a page break. So:
+ \nobreak
+ \@readbblfile
+ \fi
+}%
+\let\bibdata = \@gobble
+%
+% The \nocite{label,label,...} command writes its argument to \@auxfile,
+% unless instructed not to, but produces no text in the document. Both
+% the \nocite and \cite commands produce \citation commands in the .aux file.
+%
+\def\nocite#1{%
+ \@readauxfile
+ \@writeaux{\string\citation{#1}}%
+}%
+%
+\@innernewif\if@notfirstcitation
+%
+% \cite[note]{label,label,...} produces the citations for the labels as
+% well. If the optional argument `note' is present, it's added after
+% the labels. Since \cite calls \nocite to do its .aux-file writing,
+% \cite doesn't need to call \@readauxfile (\nocite does).
+%
+\def\cite{\@getoptionalarg\@cite}%
+%
+% Typeset the citations for the labels in #1, followed by the note, if
+% it exists. To change the citation's format in the text, redefine one
+% or more `\print...' macros, whose defaults appear later in this file.
+%
+\def\@cite#1{%
+ % Remember the optional argument, in case one of the macros we call
+ % below ends up looking for an optional argument itself. For
+ % example, if a \cite[note] triggers reading the .aux file, then the
+ % [note] would be clobbered, since \@testfileexistence looks for an
+ % optional arg.
+ \let\@citenotetext = \@optionalarg
+ % Start printing the text, beginning with a left bracket by default.
+ \printcitestart
+ % It's complicated, but because \nocite puts a `whatsit' onto the list,
+ % \nocite should follow \printcitestart. It's conceivable, but very
+ % unlikely, that this `whatsit' will cause a problem (glue that doesn't
+ % disappear when you want it to is the most likely symptom), requiring
+ % a change either to \printcitestart or to the label that the .bst file
+ % produces.
+ \nocite{#1}%
+ \@notfirstcitationfalse
+ \@for \@citation :=#1\do
+ {%
+ \expandafter\@onecitation\@citation\@@
+ }%
+ \ifx\empty\@citenotetext\else
+ \printcitenote{\@citenotetext}%
+ \fi
+ \printcitefinish
+}%
+%
+\def\@onecitation#1\@@{%
+ \if@notfirstcitation
+ \printbetweencitations
+ \fi
+ %
+ \expandafter \ifx \csname\@citelabel{#1}\endcsname \relax
+ \if@citewarning
+ \message{\@linenumber Undefined citation `#1'.}%
+ \fi
+ % Give it a dummy definition:
+ \expandafter\gdef\csname\@citelabel{#1}\endcsname{%
+ {\tt
+ \escapechar = -1
+ \nobreak\hskip0pt
+ \expandafter\string\csname#1\endcsname
+ \nobreak\hskip0pt
+ }%
+ }%
+ \fi
+ % Now produce the text, whether it was undefined or not.
+ \printcitepreitem{#1}%
+ \csname\@citelabel{#1}\endcsname
+ \printcitepostitem
+ \@notfirstcitationtrue
+}%
+%
+% Given a label `foo', the macro `\b@foo' is supposed to
+% hold the text that should be produced.
+%
+\def\@citelabel#1{b@#1}%
+%
+% So, how does a citation label get defined? When we read the .bbl file
+% (below), a \bibitem writes out a \@citedef command. And when we read
+% the \@citedef, we define \@citelabel{#1}, where #1 is the user's
+% label.
+%
+% The group around the def will keep the save stack from overflowing:
+% We are reading the .aux file inside a group. For undefined
+% commands, \csname...\endcsname makes them equivalent to \relax
+% locally in that group; when we globally redefine them, TeX enters
+% the definitions on the save stack, once for each label. When done
+% in the topmost group, this can overflow a stack of any size, given
+% sufficient number of label definitions. So, we put these
+% \csname...\endcsname's inside another group, to pop the stack for
+% every label.
+\def\@citedef#1#2{{\expandafter\gdef\csname\@citelabel{#1}\endcsname{#2}}}%
+%
+%
+% Reading the .bbl file also produces the typeset bibliography. Please
+% notice, however, that we do not produce the title for the references
+% (e.g., `References'), as LaTeX does. The formatting and spacing of
+% that title, whether it should go into the headline, and so on, are all
+% things determined by your format. We cannot know those things in
+% advance. If you wish, you can define \bblhook to produce the title.
+% Or just do it before the \bibliography command.
+%
+\def\@readbblfile{%
+ % Define a counter to tell us which item number we are on, unless
+ % we've already defined it (because the document has more than one
+ % bibliography).
+ \ifx\@itemnum\@undefined
+ \@innernewcount\@itemnum
+ \fi
+ %
+ \begingroup
+ % If another package has already defined \begin, don't define our
+ % own simplistic \begin and \end; assume they want to take care of
+ % it themselves. (That way, their \begin's and \end's for other
+ % things can be used in the bib files.)
+ \ifx\begin\@undefined
+ \def\begin##1##2{%
+ % ##1 is just `thebibliography'.
+ % ##2 is the widest label.
+ % We set (new dimen) \biblabelwidth based on the widest label
+ \setbox0 = \hbox{\biblabelcontents{##2}}%
+ \biblabelwidth = \wd0
+ }%
+ \let\end = \@gobble % The arg is `thebibliography' again.
+ \fi
+ %
+ % Here we have two possibilities:
+ % \bibitem[typesetlabel]{citationlabel}
+ % \bibitem{citationlabel}
+ % If we have the second of these, the citations are numbered, starting
+ % from one; we use our own count register \@itemnum for this.
+ %
+ \@itemnum = 0
+ \def\bibitem{\@getoptionalarg\@bibitem}%
+ \def\@bibitem{%
+ \ifx\@optionalarg\empty
+ \expandafter\@numberedbibitem
+ \else
+ \expandafter\@alphabibitem
+ \fi
+ }%
+ \def\@alphabibitem##1{%
+ % Need \xdef here for various reasons.
+ \expandafter \xdef\csname\@citelabel{##1}\endcsname {\@optionalarg}%
+ % Left-justify alpha labels, unless \biblabel{pre,post}contents
+ % are already defined.
+ \ifx\biblabelprecontents\@undefined
+ \let\biblabelprecontents = \relax
+ \fi
+ \ifx\biblabelpostcontents\@undefined
+ \let\biblabelpostcontents = \hss
+ \fi
+ \@finishbibitem{##1}%
+ }%
+ %
+ \def\@numberedbibitem##1{%
+ \advance\@itemnum by 1
+ \expandafter \xdef\csname\@citelabel{##1}\endcsname{\number\@itemnum}%
+ % Right-justify numeric labels, unless \biblabel{pre,post}contents
+ % are already defined.
+ \ifx\biblabelprecontents\@undefined
+ \let\biblabelprecontents = \hss
+ \fi
+ \ifx\biblabelpostcontents\@undefined
+ \let\biblabelpostcontents = \relax
+ \fi
+ \@finishbibitem{##1}%
+ }%
+ %
+ \def\@finishbibitem##1{%
+ \bblitemhook{##1}%
+ \biblabelprint{\csname\@citelabel{##1}\endcsname}%
+ \@writeaux{\string\@citedef{##1}{\csname\@citelabel{##1}\endcsname}}%
+ \ignorespaces
+ }%
+ %
+ % Do the printing (we're producing the bibliography, remember).
+ %
+ \ifx\undefined\em \let\em=\bblem \fi
+ \ifx\undefined\emph \let\emph=\bblemph \fi
+ \ifx\undefined\mbox \let\mbox=\bblmbox \fi
+ \ifx\undefined\newblock \let\newblock=\bblnewblock \fi
+ \ifx\undefined\sc \let\sc=\bblsc \fi
+ \ifx\undefined\textbf \let\textbf=\bbltextbf \fi
+ %
+ % Punctuation won't affect spacing;
+ \frenchspacing
+ % the penalties below are from LaTeX's [article,book,report].sty;
+ \clubpenalty = 4000 \widowpenalty = 4000
+ % the next two values come from LaTeX's \sloppy command;
+ \tolerance = 10000 \hfuzz = .5pt
+ \everypar = {\hangindent = \biblabelwidth
+ \advance\hangindent by \biblabelextraspace}%
+ \bblrm
+ % the \parskip is a guess at what looks good;
+ \parskip = 1.5ex plus .5ex minus .5ex
+ % and the space between label and text comes from LaTeX's \labelsep.
+ \biblabelextraspace = .5em
+ \bblhook
+ %
+ \input \bblfilebasename.bbl
+ \endgroup
+}%
+%
+% The widest label's width is useful for redefining \biblabelprint;
+% you redefine \biblabelwidth, in effect, by redefining the
+% \biblabelcontents macro that appears below. And \biblabelextraspace,
+% which is redefinable inside \bblhook, is added to \biblabelwidth to
+% determine the amount of hanging indentation.
+%
+\@innernewdimen\biblabelwidth
+\@innernewdimen\biblabelextraspace
+%
+% Now come the main macros that are related to the printing of the
+% bibliography. Since you might want to redefine them, they are given
+% default definitions outside of \@readbblfile.
+%
+% The first one controls the printing of a bibliography entry's label.
+% If you change it, make sure that it starts with something like
+% \noindent or \indent or \leavevmode that puts TeX into horizontal mode
+% (even if the label itself is empty); otherwise, the hanging
+% indentation will get messed up in certain circumstances.
+%
+\def\biblabelprint#1{%
+ \noindent
+ \hbox to \biblabelwidth{%
+ \biblabelprecontents
+ \biblabelcontents{#1}%
+ \biblabelpostcontents
+ }%
+ \kern\biblabelextraspace
+}%
+%
+% If you are using numeric labels, and you want them left-justified
+% (numeric labels by default are right-justified), do something like:
+% \def\biblabelprecontents{\relax}
+% \def\biblabelpostcontents{\hss}
+%
+% By default the labels are typeset in \bblrm, and enclosed in brackets.
+\def\biblabelcontents#1{{\bblrm [#1]}}%
+%
+% The main text, too, is typeset using \bblrm, which is \rm by default.
+\def\bblrm{\rm}%
+%
+% Emphasis for producing, e.g., titles, is done with \it by default.
+\def\bblem{\it}%
+%
+% Another way to emphasize, with built-in italic correction. (Doesn't
+% look for a following comma or period, though.)
+\def\bblemph#1{{\bblem #1\/}}
+%
+% And bold.
+\def\bbltextbf#1{{\bf #1}}
+%
+% \mbox is \hbox forcing horizontal mode.
+\def\bblmbox{\leavevmode\hbox}
+%
+% Some styles use a caps-and-small-caps font for author names. LaTeX
+% defines an \sc command but plain TeX doesn't, so we need one here.
+% The definition below doesn't load the font unless it's needed, but it
+% tries to load only the 10pt version, because it might not exist at
+% other point sizes.
+%
+\def\bblsc{\ifx\@scfont\@undefined
+ \font\@scfont = cmcsc10
+ \fi
+ \@scfont
+}%
+%
+% The major parts of an entry are separated with \bblnewblock. The
+% numbers below are taken from LaTeX's `article' style.
+%
+\def\bblnewblock{\hskip .11em plus .33em minus .07em }%
+%
+% Here's where you stick any other bibliography-formatting goodies, or
+% redefine the values above.
+%
+\let\bblhook = \empty
+%
+% And here you can add code to be executed before each item (before
+% \biblabelprint is called). The parameter is citation label for this
+% bibliography entry.
+%
+\let\bblitemhook = \@gobble
+%
+%
+% Here are the four default definitions for formatting the in-text
+% citations. These are what you redefine (after your \input btxmac but
+% before your \bibliography) to get parens instead of brackets, or
+% superscripts, or footnotes, or whatever.
+%
+\def\printcitestart{[}% left bracket
+\def\printcitefinish{]}% right bracket
+\def\printbetweencitations{, }% comma, space
+\let\printcitepreitem\@gobble % takes label
+\let\printcitepostitem\empty
+\def\printcitenote#1{, #1}% comma, space, note (if it exists)
+%
+% That scheme is pretty flexible. For example you could use
+% \def\printcitestart{\unskip $^\bgroup}
+% \def\printcitefinish{\egroup$}
+% \def\printbetweencitations{,}
+% \def\printcitenote#1{\hbox{\sevenrm\space (#1)}}
+% \font\eighttt = cmtt8
+% \scriptfont\ttfam = \eighttt
+% to get superscripted in-text citations. (The scriptfont stuff
+% exists only to print an undefined citation; it's in cmtt8 because
+% there is no cmtt7.) To get something radically different, however,
+% you'll have to define your own \cite command.
+%
+% When we read `\citation' from the .aux file, it means nothing.
+%
+\let\citation = \@gobble
+%
+%
+% Now comes the stuff for dealing with LaTeX's \newcommand. As
+% mentioned earlier, this \newcommand will redefine a preexisting
+% command; that's different from how LaTeX's \newcommand behaves.
+%
+\@innernewcount\@btxnumparams
+%
+% \newcommand{\foo}[n]{text} defines the control sequence \foo to have n
+% parameters, and replacement text `text'. In LaTeX, this command gives
+% a warning if \foo is already defined, and allows a second
+% optional argument (which is a default value for the first optional
+% arg) but we don't bother with either of these.
+%
+\ifx\newcommand\undefined
+\long\def\newcommand#1{%
+ \def\@btxcommandname{#1}%
+ \@getoptionalarg\@btxcontinuenewcommand
+}%
+\fi
+%
+%
+% \renewcommand{\foo}[n]{text}, for our purposes, is the same as
+% \newcommand. In LaTeX, it gives a warning if \foo is not already defined.
+%
+\ifx\renewcommand\undefined
+ \let\renewcommand = \newcommand
+\fi
+%
+%
+% \providecommand{\foo}[n]{text} defines \foo as in \newcommand only if
+% \foo is not already defined.
+%
+\ifx\providecommand\undefined
+\long\def\providecommand#1{%
+ \def\@btxcommandname{#1}%
+ %
+ \expandafter\ifx\@btxcommandname \@undefined
+ \let\cs=\@btxcontinuenewcommand % undefined, so we'll define it
+ \else
+ \let\cs=\@gobble % already defined, so ignore it
+ \fi
+ \@getoptionalarg\cs
+}%
+\fi
+%
+%
+% Figure out if this definition has parameters.
+%
+\def\@btxcontinuenewcommand{%
+ % If no optional argument, we have zero parameters. Otherwise, we
+ % have that many.
+ \@btxnumparams = \ifx\@optionalarg\empty 0\else\@optionalarg \fi \relax
+ \@btxnewcommand
+}%
+%
+% \@btxnumparams is how many arguments this command has. The name of the
+% command is \@btxcommandname. The replacement text for the new macro is #1.
+%
+\def\@btxnewcommand#1{%
+ \def\@btxstartdef{\expandafter\def\@btxcommandname}%
+ \ifnum\@btxnumparams=0
+ \let\@btxparamdef = \empty
+ \else
+ \ifnum\@btxnumparams>9
+ \errmessage{\the\@btxnumparams\space is too many parameters}%
+ \else
+ \ifnum\@btxnumparams<0
+ \errmessage{\the\@btxnumparams\space is too few parameters}%
+ \else
+ \edef\@btxparamdef{%
+ % This is sad, but \loop doesn't work inside \edef,
+ % because \body isn't defined.
+ \ifcase\@btxnumparams
+ \empty No arguments.
+ \or ####1%
+ \or ####1####2%
+ \or ####1####2####3%
+ \or ####1####2####3####4%
+ \or ####1####2####3####4####5%
+ \or ####1####2####3####4####5####6%
+ \or ####1####2####3####4####5####6####7%
+ \or ####1####2####3####4####5####6####7####8%
+ \or ####1####2####3####4####5####6####7####8####9%
+ \fi
+ }%
+ \fi
+ \fi
+ \fi
+ \expandafter\@btxstartdef\@btxparamdef{#1}%
+}%
+%
+%% [[[end of BibTeX-specific stuff]]]
+%
+%
+% Names of references (arguments given in the \cite and \nocite
+% commands) and file names (arguments given in the \bibliography and
+% \bibliographystyle commands) are recorded in \jobname.aux, called the
+% \@auxfile in these macros. Here's how they get read in.
+%
+\def\@readauxfile{%
+ \if@auxfiledone \else % remember: \@auxfiledonetrue if \noauxfile is defined
+ \global\@auxfiledonetrue
+ \@testfileexistence{aux}%
+ \if@fileexists
+ \begingroup
+ % Because we might be in horizontal mode when \@readauxfile
+ % is called (if it's in response to a \cite or \nocite), we
+ % want to ignore all the would-be spaces at the ends of
+ % lines in the aux file. Fortunately, it's highly unlikely
+ % an end-of-line might actually be desired.
+ % And because we don't change the category code of anything
+ % but @, primitives like \gdef can't be used to define labels
+ % in the aux file. The solution adopted by btxmac.tex is to
+ % write `\@citedef{LABEL}{DEFINITION}' to the aux file, and
+ % use \csname on LABEL.
+ \endlinechar = -1
+ \catcode`@ = 11
+ \input \jobname.aux
+ \endgroup
+ \else
+ \message{\@undefinedmessage}%
+ \global\@citewarningfalse
+ \fi
+ \immediate\openout\@auxfile = \jobname.aux
+ \fi
+}%
+%
+% The \@readauxfile macro does all that work the first time it's called.
+% Since it's called once for every \cite, \nocite, \bibliography, and
+% \bibliographystyle command that the user issues, we need to remember
+% whether the work's been done. It's considered done if we're not to do
+% it---that is, if \noauxfile is defined.
+%
+\newif\if@auxfiledone
+\ifx\noauxfile\@undefined \else \@auxfiledonetrue\fi
+%
+% It's conceivable you'd want to change how other characters are read;
+% to do that, change their category code before doing \input btxmac.
+%
+%
+% After reading the .aux file, \@readauxfile opens it for writing.
+% The \@writeaux macro does the actual writing (as long as
+% \noauxfile is undefined).
+%
+\@innernewwrite\@auxfile
+\def\@writeaux#1{\ifx\noauxfile\@undefined \write\@auxfile{#1}\fi}%
+%
+%
+% A macro package that uses btxmac.tex might define
+% \@undefinedmessage (before doing an \input btxmac).
+%
+\ifx\@undefinedmessage\@undefined
+ \def\@undefinedmessage{No .aux file; I won't give you warnings about
+ undefined citations.}%
+\fi
+%
+% Even if citations are undefined, we want to complain only if
+% \@citewarningtrue. The default is to set \@citewarningtrue unless
+% \noauxfile is defined. Again, a macro package that uses
+% btxmac.tex might want to redefine this.
+%
+\@innernewif\if@citewarning
+\ifx\noauxfile\@undefined \@citewarningtrue\fi
+%
+%
+% Finally, before leaving we restore @'s old category code.
+%
+\catcode`@ = \@oldatcatcode
diff --git a/macros/eplain/tex/eplain.aux b/macros/eplain/tex/eplain.aux
new file mode 100644
index 0000000000..0efcf286dc
--- /dev/null
+++ b/macros/eplain/tex/eplain.aux
@@ -0,0 +1,3 @@
+% This eplain.aux file is installed for the sake of initex. Running
+% initex without this file would produce an eplain.fmt which never
+% issues warning messages about undefined labels.
diff --git a/macros/eplain/tex/eplain.ini b/macros/eplain/tex/eplain.ini
new file mode 100644
index 0000000000..0df42edf05
--- /dev/null
+++ b/macros/eplain/tex/eplain.ini
@@ -0,0 +1,6 @@
+% Thomas Esser, 1998. public domain.
+% hyphenation is set up in language.dat
+\input bplain
+\input eplain
+\dump
+\endinput
diff --git a/macros/eplain/tex/eplain.tex b/macros/eplain/tex/eplain.tex
new file mode 100644
index 0000000000..d4dc8e2a1c
--- /dev/null
+++ b/macros/eplain/tex/eplain.tex
@@ -0,0 +1,4135 @@
+%% @texfile{
+%% author = "Karl Berry, Steven Smith, Oleg Katsitadze, and others",
+%% version = "3.9",
+%% date = "Thu May 30 08:55:47 PDT 2019",
+%% filename = "eplain.tex",
+%% email = "bug-eplain@tug.org",
+%% checksum = "4135 9294 134244",
+%% codetable = "ASCII",
+%% supported = "yes",
+%% docstring = "This file defines macros that extend and expand on
+%% plain TeX. eplain.tex is xeplain.tex and the other
+%% source files with comments stripped; see the original
+%% files for author credits, etc. The original sources
+%% can be found in Eplain sources in your TeX
+%% distribution, on CTAN or on Eplain's home page at
+%% http://tug.org/eplain. Please base diffs or
+%% other contributions on xeplain.tex, not the
+%% stripped-down eplain.tex.",
+%% }
+\ifx\eplain\undefined
+ \let\next\relax
+\else
+ \expandafter\let\expandafter\next\csname endinput\endcsname
+\fi
+\next
+%%
+%% This is file `ifpdf.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% ifpdf.dtx (with options: `package')
+%%
+%% Source File: ifpdf.dtx
+%% Copyright 2016 Heiko Oberdiek and LaTeX3 project
+%%
+%% This file may be distributed under the terms of the LPPL.
+%% See README for details.
+\ifx\ProvidesPackage\undefined
+\def\next#1#2[#3]{\wlog{#2 #3}}
+\expandafter\next\fi
+\ProvidesPackage{ifpdf}
+[2016/04/04 v3.0 Provides the ifpdf switch]
+\expandafter\ifx\csname ifpdf\endcsname\relax
+ \csname newif\expandafter\endcsname\csname ifpdf\endcsname
+\else
+ \ifx\pdftrue\undefined
+ \ifx\PackageError\undefined
+ \begingroup\def\PackageError#1#2#3{\endgroup\errmessage{#2}}
+ \fi
+ \PackageError{ifpdf}{incompatible ifpdf definition}{}
+ \expandafter\expandafter\expandafter
+ \fi
+\fi
+\let\ifpdf\iffalse
+\ifx\directlua\undefined
+\begingroup\expandafter\expandafter\expandafter\endgroup
+\expandafter\ifx\csname pdfoutput\endcsname\relax
+\else
+ \ifnum\pdfoutput>0 %
+ \pdftrue
+ \fi
+\fi
+\else
+\directlua{%
+if (tex.outputmode or tex.pdfoutput or 0) > 0 then
+ tex.print('\string\\pdftrue')
+end
+}
+\fi
+%%
+%% End of file `ifpdf.sty'.
+\def\makeactive#1{\catcode`#1 = \active \ignorespaces}%
+\chardef\letter = 11
+\chardef\other = 12
+\def\makeatletter{%
+ \edef\resetatcatcode{\catcode`\noexpand\@\the\catcode`\@\relax}%
+ \catcode`\@11\relax
+}%
+\def\makeatother{%
+ \edef\resetatcatcode{\catcode`\noexpand\@\the\catcode`\@\relax}%
+ \catcode`\@12\relax
+}%
+\edef\leftdisplays{\the\catcode`@}%
+\catcode`@ = \letter
+\let\@eplainoldatcode = \leftdisplays
+\toksdef\toks@ii = 2
+\def\uncatcodespecials{%
+ \def\do##1{\catcode`##1 = \other}%
+ \dospecials
+}%
+{%
+ \makeactive\^^M %
+ \long\gdef\letreturn#1{\let^^M = #1}%
+}%
+\let\@eattoken = \relax % Define this, so \eattoken can be used in \edef.
+\def\eattoken{\let\@eattoken = }%
+\def\gobble#1{}%
+\def\gobbletwo#1#2{}%
+\def\gobblethree#1#2#3{}%
+\def\identity#1{#1}%
+\def\@emptymarkA{\@emptymarkB}
+\def\ifempty#1{\@@ifempty #1\@emptymarkA\@emptymarkB}%
+\def\@@ifempty#1#2\@emptymarkB{\ifx #1\@emptymarkA}%
+\def\@gobbleminus#1{\ifx-#1\else#1\fi}%
+\def\ifinteger#1{\ifcat_\ifnum9<1\@gobbleminus#1 _\else A\fi}%
+\def\isinteger{TT\fi\ifinteger}%
+\def\@gobblemeaning#1:->{}%
+\def\sanitize{\expandafter\@gobblemeaning\meaning}%
+\def\ifundefined#1{\expandafter\ifx\csname#1\endcsname\relax}%
+\def\csn#1{\csname#1\endcsname}%
+\def\ece#1#2{\expandafter#1\csname#2\endcsname}%
+\def\expandonce{\expandafter\noexpand}%
+\let\@plainwlog = \wlog
+\let\wlog = \gobble
+\newlinechar = `^^J
+\def\gloggingall{\begingroup \globaldefs = 1 \loggingall \endgroup}%
+\def\loggingall{\tracingcommands\tw@\tracingstats\tw@
+ \tracingpages\@ne\tracingoutput\@ne\tracinglostchars\@ne
+ \tracingmacros\tw@\tracingparagraphs\@ne\tracingrestores\@ne
+ \showboxbreadth\maxdimen\showboxdepth\maxdimen
+}%
+\def\tracingboxes{\showboxbreadth = \maxdimen \showboxdepth = \maxdimen}%
+\def\gtracingoff{\begingroup \globaldefs = 1 \tracingoff \endgroup}%
+\def\tracingoff{\tracingonline\z@\tracingcommands\z@\tracingstats\z@
+ \tracingpages\z@\tracingoutput\z@\tracinglostchars\z@
+ \tracingmacros\z@\tracingparagraphs\z@\tracingrestores\z@
+ \showboxbreadth5 \showboxdepth3
+}%
+\begingroup
+ \catcode`\{ = 12 \catcode`\} = 12
+ \catcode`\[ = 1 \catcode`\] = 2
+ \gdef\lbracechar[{]%
+ \gdef\rbracechar[}]%
+ \catcode`\% = \other
+ \gdef\percentchar[%]\endgroup
+\def\vpenalty{\ifhmode\par\fi \penalty}%
+\def\hpenalty{\ifvmode\leavevmode\fi \penalty}%
+\def\iterate{%
+ \let\loop@next\relax
+ \body
+ \let\loop@next\iterate
+ \fi
+ \loop@next
+}%
+\def\edefappend#1#2{%
+ \toks@ = \expandafter{#1}%
+ \edef#1{\the\toks@ #2}%
+}%
+\def\allowhyphens{\nobreak\hskip\z@skip}%
+\long\def\hookprepend{\@hookassign{\the\toks@ii \the\toks@}}%
+\long\def\hookappend{\@hookassign{\the\toks@ \the\toks@ii}}%
+\let\hookaction = \hookappend % either one should be ok
+\long\def\@hookassign#1#2#3{%
+ \expandafter\ifx\csname @#2hook\endcsname \relax
+ \toks@ = {}%
+ \else
+ \expandafter\let\expandafter\temp \csname @#2hook\endcsname
+ \toks@ = \expandafter{\temp}%
+ \fi
+ \toks2 = {#3}% Don't expand the argument all the way.
+ \ece\edef{@#2hook}{#1}%
+}%
+\long\def\hookactiononce#1#2{%
+ \edefappend#2{\global\let\noexpand#2\relax}
+ \hookaction{#1}#2%
+}%
+\def\hookrun#1{%
+ \expandafter\ifx\csname @#1hook\endcsname \relax \else
+ \def\temp{\csname @#1hook\endcsname}%
+ \expandafter\temp
+ \fi
+}%
+\def\setproperty#1#2#3{\ece\edef{#1@p#2}{#3}}%
+\def\setpropertyglobal#1#2#3{\ece\xdef{#1@p#2}{#3}}%
+\def\getproperty#1#2{%
+ \expandafter\ifx\csname#1@p#2\endcsname\relax
+ \else \csname#1@p#2\endcsname
+ \fi
+}%
+\ifx\@undefinedmessage\@undefined
+ \def\@undefinedmessage
+ {No .aux file; I won't warn you about undefined labels.}%
+\fi
+%% @texfile{
+%% author = "Karl Berry and Oren Patashnik",
+%% version = "0.99p",
+%% date = "30 May 2019",
+%% filename = "btxmac.tex",
+%% address = "tex-eplain@tug.org",
+%% supported = "yes",
+%% docstring = "Defines macros that make BibTeX work with plain TeX",
+%% }
+\edef\cite{\the\catcode`@}%
+\catcode`@ = 11
+\let\@oldatcatcode = \cite
+\chardef\@letter = 11
+\chardef\@other = 12
+\def\@innerdef#1#2{\edef#1{\expandafter\noexpand\csname #2\endcsname}}%
+\@innerdef\@innernewcount{newcount}%
+\@innerdef\@innernewdimen{newdimen}%
+\@innerdef\@innernewif{newif}%
+\@innerdef\@innernewwrite{newwrite}%
+\def\@gobble#1{}%
+\ifx\inputlineno\@undefined
+ \let\@linenumber = \empty % Pre-3.0.
+\else
+ \def\@linenumber{\the\inputlineno:\space}%
+\fi
+\long\def\@futurenonspacelet#1{\def\cs{#1}%
+ \afterassignment\@stepone\let\@nexttoken=
+}%
+\begingroup % The grouping here avoids stepping on an outside use of `\\'.
+\def\\{\global\let\@stoken= }%
+\\ % now \@stoken is a space token (\\ is a control symbol, so that
+\endgroup
+\def\@stepone{\expandafter\futurelet\cs\@steptwo}%
+\def\@steptwo{\expandafter\ifx\cs\@stoken\let\@@next=\@stepthree
+ \else\let\@@next=\@nexttoken\fi \@@next}%
+\def\@stepthree{\afterassignment\@stepone\let\@@next= }%
+\def\@getoptionalarg#1{%
+ \let\@optionalusercs = #1%
+ \let\@optionalnext = \relax
+ \@futurenonspacelet\@optionalnext\@bracketcheck
+}%
+\def\@bracketcheck{%
+ \ifx [\@optionalnext
+ \expandafter\@@getoptionalarg % we have an optional arg
+ \else
+ \let\@optionalarg = \empty % no optional arg
+ \expandafter\@optionalusercs
+ \fi
+}%
+\def\@@getoptionalarg[#1]{%
+ \def\@optionalarg{#1}%
+ \let\@optdummy=\relax % just in case it has become \outer somehow
+ \@futurenonspacelet\@optdummy\@optionalusercs
+}%
+\def\@nnil{\@nil}%
+\def\@fornoop#1\@@#2#3{}%
+\def\@for#1:=#2\do#3{%
+ \edef\@fortmp{#2}%
+ \ifx\@fortmp\empty \else
+ \expandafter\@forloop#2,\@nil,\@nil\@@#1{#3}%
+ \fi
+}%
+\def\@forloop#1,#2,#3\@@#4#5{\def#4{#1}\ifx #4\@nnil \else
+ #5\def#4{#2}\ifx #4\@nnil \else#5\@iforloop #3\@@#4{#5}\fi\fi
+}%
+\def\@iforloop#1,#2\@@#3#4{\def#3{#1}\ifx #3\@nnil
+ \let\@nextwhile=\@fornoop \else
+ #4\relax\let\@nextwhile=\@iforloop\fi\@nextwhile#2\@@#3{#4}%
+}%
+\@innernewif\if@fileexists
+\def\@testfileexistence{\@getoptionalarg\@finishtestfileexistence}%
+\def\@finishtestfileexistence#1{%
+ \begingroup
+ \def\extension{#1}%
+ \immediate\openin0 =
+ \ifx\@optionalarg\empty\jobname\else\@optionalarg\fi
+ \ifx\extension\empty \else .#1\fi
+ \space
+ \ifeof 0
+ \global\@fileexistsfalse
+ \else
+ \global\@fileexiststrue
+ \fi
+ \immediate\closein0
+ \endgroup
+}%
+\toks0 = {%
+\def\bibliographystyle#1{%
+ \@readauxfile
+ \@writeaux{\string\bibstyle{#1}}%
+}%
+\let\bibstyle = \@gobble
+\let\bblfilebasename = \jobname
+\def\bibliography#1{%
+ \@readauxfile
+ \@writeaux{\string\bibdata{#1}}%
+ \@testfileexistence[\bblfilebasename]{bbl}%
+ \if@fileexists
+ \nobreak
+ \@readbblfile
+ \fi
+}%
+\let\bibdata = \@gobble
+\def\nocite#1{%
+ \@readauxfile
+ \@writeaux{\string\citation{#1}}%
+}%
+\@innernewif\if@notfirstcitation
+\def\cite{\@getoptionalarg\@cite}%
+\def\@cite#1{%
+ \let\@citenotetext = \@optionalarg
+ \printcitestart
+ \nocite{#1}%
+ \@notfirstcitationfalse
+ \@for \@citation :=#1\do
+ {%
+ \expandafter\@onecitation\@citation\@@
+ }%
+ \ifx\empty\@citenotetext\else
+ \printcitenote{\@citenotetext}%
+ \fi
+ \printcitefinish
+}%
+\def\@onecitation#1\@@{%
+ \if@notfirstcitation
+ \printbetweencitations
+ \fi
+ \expandafter \ifx \csname\@citelabel{#1}\endcsname \relax
+ \if@citewarning
+ \message{\@linenumber Undefined citation `#1'.}%
+ \fi
+ \expandafter\gdef\csname\@citelabel{#1}\endcsname{%
+ {\tt
+ \escapechar = -1
+ \nobreak\hskip0pt
+ \expandafter\string\csname#1\endcsname
+ \nobreak\hskip0pt
+ }%
+ }%
+ \fi
+ \printcitepreitem{#1}%
+ \csname\@citelabel{#1}\endcsname
+ \printcitepostitem
+ \@notfirstcitationtrue
+}%
+\def\@citelabel#1{b@#1}%
+\def\@citedef#1#2{{\expandafter\gdef\csname\@citelabel{#1}\endcsname{#2}}}%
+\def\@readbblfile{%
+ \ifx\@itemnum\@undefined
+ \@innernewcount\@itemnum
+ \fi
+ \begingroup
+ \ifx\begin\@undefined
+ \def\begin##1##2{%
+ \setbox0 = \hbox{\biblabelcontents{##2}}%
+ \biblabelwidth = \wd0
+ }%
+ \let\end = \@gobble % The arg is `thebibliography' again.
+ \fi
+ \@itemnum = 0
+ \def\bibitem{\@getoptionalarg\@bibitem}%
+ \def\@bibitem{%
+ \ifx\@optionalarg\empty
+ \expandafter\@numberedbibitem
+ \else
+ \expandafter\@alphabibitem
+ \fi
+ }%
+ \def\@alphabibitem##1{%
+ \expandafter \xdef\csname\@citelabel{##1}\endcsname {\@optionalarg}%
+ \ifx\biblabelprecontents\@undefined
+ \let\biblabelprecontents = \relax
+ \fi
+ \ifx\biblabelpostcontents\@undefined
+ \let\biblabelpostcontents = \hss
+ \fi
+ \@finishbibitem{##1}%
+ }%
+ \def\@numberedbibitem##1{%
+ \advance\@itemnum by 1
+ \expandafter \xdef\csname\@citelabel{##1}\endcsname{\number\@itemnum}%
+ \ifx\biblabelprecontents\@undefined
+ \let\biblabelprecontents = \hss
+ \fi
+ \ifx\biblabelpostcontents\@undefined
+ \let\biblabelpostcontents = \relax
+ \fi
+ \@finishbibitem{##1}%
+ }%
+ \def\@finishbibitem##1{%
+ \bblitemhook{##1}%
+ \biblabelprint{\csname\@citelabel{##1}\endcsname}%
+ \@writeaux{\string\@citedef{##1}{\csname\@citelabel{##1}\endcsname}}%
+ \ignorespaces
+ }%
+ \ifx\undefined\em \let\em=\bblem \fi
+ \ifx\undefined\emph \let\emph=\bblemph \fi
+ \ifx\undefined\mbox \let\mbox=\bblmbox \fi
+ \ifx\undefined\newblock \let\newblock=\bblnewblock \fi
+ \ifx\undefined\sc \let\sc=\bblsc \fi
+ \ifx\undefined\textbf \let\textbf=\bbltextbf \fi
+ \frenchspacing
+ \clubpenalty = 4000 \widowpenalty = 4000
+ \tolerance = 10000 \hfuzz = .5pt
+ \everypar = {\hangindent = \biblabelwidth
+ \advance\hangindent by \biblabelextraspace}%
+ \bblrm
+ \parskip = 1.5ex plus .5ex minus .5ex
+ \biblabelextraspace = .5em
+ \bblhook
+ \input \bblfilebasename.bbl
+ \endgroup
+}%
+\@innernewdimen\biblabelwidth
+\@innernewdimen\biblabelextraspace
+\def\biblabelprint#1{%
+ \noindent
+ \hbox to \biblabelwidth{%
+ \biblabelprecontents
+ \biblabelcontents{#1}%
+ \biblabelpostcontents
+ }%
+ \kern\biblabelextraspace
+}%
+\def\biblabelcontents#1{{\bblrm [#1]}}%
+\def\bblrm{\rm}%
+\def\bblem{\it}%
+\def\bblemph#1{{\bblem #1\/}}
+\def\bbltextbf#1{{\bf #1}}
+\def\bblmbox{\leavevmode\hbox}
+\def\bblsc{\ifx\@scfont\@undefined
+ \font\@scfont = cmcsc10
+ \fi
+ \@scfont
+}%
+\def\bblnewblock{\hskip .11em plus .33em minus .07em }%
+\let\bblhook = \empty
+\let\bblitemhook = \@gobble
+\def\printcitestart{[}% left bracket
+\def\printcitefinish{]}% right bracket
+\def\printbetweencitations{, }% comma, space
+\let\printcitepreitem\@gobble % takes label
+\let\printcitepostitem\empty
+\def\printcitenote#1{, #1}% comma, space, note (if it exists)
+\let\citation = \@gobble
+\@innernewcount\@btxnumparams
+\ifx\newcommand\undefined
+\long\def\newcommand#1{%
+ \def\@btxcommandname{#1}%
+ \@getoptionalarg\@btxcontinuenewcommand
+}%
+\fi
+\ifx\renewcommand\undefined
+ \let\renewcommand = \newcommand
+\fi
+\ifx\providecommand\undefined
+\long\def\providecommand#1{%
+ \def\@btxcommandname{#1}%
+ \expandafter\ifx\@btxcommandname \@undefined
+ \let\cs=\@btxcontinuenewcommand % undefined, so we'll define it
+ \else
+ \let\cs=\@gobble % already defined, so ignore it
+ \fi
+ \@getoptionalarg\cs
+}%
+\fi
+\def\@btxcontinuenewcommand{%
+ \@btxnumparams = \ifx\@optionalarg\empty 0\else\@optionalarg \fi \relax
+ \@btxnewcommand
+}%
+\def\@btxnewcommand#1{%
+ \def\@btxstartdef{\expandafter\def\@btxcommandname}%
+ \ifnum\@btxnumparams=0
+ \let\@btxparamdef = \empty
+ \else
+ \ifnum\@btxnumparams>9
+ \errmessage{\the\@btxnumparams\space is too many parameters}%
+ \else
+ \ifnum\@btxnumparams<0
+ \errmessage{\the\@btxnumparams\space is too few parameters}%
+ \else
+ \edef\@btxparamdef{%
+ \ifcase\@btxnumparams
+ \empty No arguments.
+ \or ####1%
+ \or ####1####2%
+ \or ####1####2####3%
+ \or ####1####2####3####4%
+ \or ####1####2####3####4####5%
+ \or ####1####2####3####4####5####6%
+ \or ####1####2####3####4####5####6####7%
+ \or ####1####2####3####4####5####6####7####8%
+ \or ####1####2####3####4####5####6####7####8####9%
+ \fi
+ }%
+ \fi
+ \fi
+ \fi
+ \expandafter\@btxstartdef\@btxparamdef{#1}%
+}%
+}%
+\ifx\nobibtex\@undefined \the\toks0 \fi
+\def\@readauxfile{%
+ \if@auxfiledone \else % remember: \@auxfiledonetrue if \noauxfile is defined
+ \global\@auxfiledonetrue
+ \@testfileexistence{aux}%
+ \if@fileexists
+ \begingroup
+ \endlinechar = -1
+ \catcode`@ = 11
+ \input \jobname.aux
+ \endgroup
+ \else
+ \message{\@undefinedmessage}%
+ \global\@citewarningfalse
+ \fi
+ \immediate\openout\@auxfile = \jobname.aux
+ \fi
+}%
+\newif\if@auxfiledone
+\ifx\noauxfile\@undefined \else \@auxfiledonetrue\fi
+\@innernewwrite\@auxfile
+\def\@writeaux#1{\ifx\noauxfile\@undefined \write\@auxfile{#1}\fi}%
+\ifx\@undefinedmessage\@undefined
+ \def\@undefinedmessage{No .aux file; I won't give you warnings about
+ undefined citations.}%
+\fi
+\@innernewif\if@citewarning
+\ifx\noauxfile\@undefined \@citewarningtrue\fi
+\catcode`@ = \@oldatcatcode
+\let\auxfile = \@auxfile
+\let\for = \@for
+\let\futurenonspacelet = \@futurenonspacelet
+\def\iffileexists{\if@fileexists}%
+\let\innerdef = \@innerdef
+\let\innernewcount = \@innernewcount
+\let\innernewdimen = \@innernewdimen
+\let\innernewif = \@innernewif
+\let\innernewwrite = \@innernewwrite
+\let\linenumber = \@linenumber
+\let\readauxfile = \@readauxfile
+\let\spacesub = \@spacesub
+\let\testfileexistence = \@testfileexistence
+\let\writeaux = \@writeaux
+\def\innerinnerdef#1{\expandafter\innerdef\csname inner#1\endcsname{#1}}%
+\innerinnerdef{newbox}%
+\innerinnerdef{newfam}%
+\innerinnerdef{newhelp}%
+\innerinnerdef{newinsert}%
+\innerinnerdef{newlanguage}%
+\innerinnerdef{newmuskip}%
+\innerinnerdef{newread}%
+\innerinnerdef{newskip}%
+\innerinnerdef{newtoks}%
+\def\immediatewriteaux#1{%
+ \ifx\noauxfile\@undefined
+ \immediate\write\@auxfile{#1}%
+ \fi
+}%
+\def\bblitemhook#1{\gdef\@hlbblitemlabel{#1}}%
+\def\biblabelprint#1{%
+ \noindent
+ \hbox to \biblabelwidth{%
+ \hldest@impl{bib}{\@hlbblitemlabel}%
+ \biblabelprecontents
+ \biblabelcontents{#1}%
+ \biblabelpostcontents
+ }%
+ \kern\biblabelextraspace
+}%
+\def\eplainprintcitepreitem#1{\hlstart@impl{cite}{#1}}%
+\def\eplainprintcitepostitem{\hlend@impl{cite}}%
+\def\printcitepreitem#1{%
+ \testfileexistence[\bblfilebasename]{bbl}%
+ \iffileexists
+ \global\let\printcitepreitem\eplainprintcitepreitem
+ \global\let\printcitepostitem\eplainprintcitepostitem
+ \else
+ \global\let\printcitepreitem\gobble
+ \global\let\printcitepostitem\relax
+ \fi
+ \printcitepreitem{#1}%
+}%
+\def\@Nnil{\@Nil}%
+\def\@Fornoop#1\@@#2#3{}%
+\def\For#1:=#2\do#3{%
+ \edef\@Fortmp{#2}%
+ \ifx\@Fortmp\empty \else
+ \expandafter\@Forloop#2,\@Nil,\@Nil\@@#1{#3}%
+ \fi
+}%
+\def\@Forloop#1,#2,#3\@@#4#5{\@Fordef#1\@@#4\ifx #4\@Nnil \else
+ #5\@Fordef#2\@@#4\ifx #4\@Nnil \else#5\@iForloop #3\@@#4{#5}\fi\fi
+}%
+\def\@iForloop#1,#2\@@#3#4{\@Fordef#1\@@#3\ifx #3\@Nnil
+ \let\@Nextwhile=\@Fornoop \else
+ #4\relax\let\@Nextwhile=\@iForloop\fi\@Nextwhile#2\@@#3{#4}%
+}%
+\def\@Forspc{ }%
+\def\@Fordef{\futurelet\@Fortmp\@@Fordef}% Peep at the next token.
+\def\@@Fordef{%
+ \expandafter\ifx\@Forspc\@Fortmp % Next token is a space.
+ \expandafter\@Fortrim
+ \else
+ \expandafter\@@@Fordef
+ \fi
+}%
+\expandafter\def\expandafter\@Fortrim\@Forspc#1\@@{\@Fordef#1\@@}%
+\def\@@@Fordef#1\@@#2{\def#2{#1}}%
+\def\tmpfileextension{.tmp}%
+\let\tmpfilebasename = \jobname
+\ifx\eTeXversion\undefined
+ \innernewwrite\eplain@tmpfile
+ \def\scantokens#1{%
+ \toks@={#1}%
+ \immediate\openout\eplain@tmpfile=\tmpfilebasename\tmpfileextension
+ \immediate\write\eplain@tmpfile{\the\toks@}%
+ \immediate\closeout\eplain@tmpfile
+ \input \tmpfilebasename\tmpfileextension\relax
+ }%
+\fi
+\begingroup
+ \makeactive\^^M \makeactive\ % No spaces or ^^M's from here on.
+\gdef\obeywhitespace{%
+\makeactive\^^M\def^^M{\par\futurelet\next\@finishobeyedreturn}%
+\makeactive\ \let =\ %
+\aftergroup\@removebox%
+\futurelet\next\@finishobeywhitespace%
+}%
+\gdef\@finishobeywhitespace{{%
+\ifx\next %
+\aftergroup\@obeywhitespaceloop%
+\else\ifx\next^^M%
+\aftergroup\gobble%
+\fi\fi}}%
+\gdef\@finishobeyedreturn{%
+\ifx\next^^M\vskip\blanklineskipamount\fi%
+\indent%
+}%
+\endgroup
+\def\@obeywhitespaceloop#1{\futurelet\next\@finishobeywhitespace}%
+\def\@removebox{%
+ \ifhmode
+ \setbox0 = \lastbox
+ \ifdim\wd0=\parindent
+ \setbox2 = \hbox{\unhcopy0}% Preserve \box0 so we can put it back.
+ \ifdim\wd2=0pt
+ \ignorespaces
+ \else
+ \box0 % Put it back: it wasn't empty.
+ \fi
+ \else
+ \box0 % Put it back: it wasn't the right width.
+ \fi
+ \fi
+}%
+\newskip\blanklineskipamount
+\blanklineskipamount = 0pt
+\def\frac#1/#2{\leavevmode
+ \kern.1em \raise .5ex \hbox{\the\scriptfont0 #1}%
+ \kern-.1em $/$%
+ \kern-.15em \lower .25ex \hbox{\the\scriptfont0 #2}%
+}%
+\newdimen\hruledefaultheight \hruledefaultheight = 0.4pt
+\newdimen\hruledefaultdepth \hruledefaultdepth = 0.0pt
+\newdimen\vruledefaultwidth \vruledefaultwidth = 0.4pt
+\def\ehrule{\hrule height\hruledefaultheight depth\hruledefaultdepth}%
+\def\evrule{\vrule width\vruledefaultwidth}%
+%%% ====================================================================
+%%% @TeX-style-file{
+%%% author = "Nelson H. F. Beebe",
+%%% version = "1.10",
+%%% date = "02 March 1998",
+%%% time = "08:36:13 MST",
+%%% filename = "texnames.sty",
+%%% address = "Center for Scientific Computing
+%%% Department of Mathematics
+%%% South Physics Building
+%%% University of Utah
+%%% Salt Lake City, UT 84112
+%%% USA
+%%% Tel: (801) 581-5254
+%%% FAX: (801) 581-4148",
+%%% checksum = "27723 296 1385 12423",
+%%% email = "beebe@magna.math.utah.edu (Internet)",
+%%% codetable = "ISO/ASCII",
+%%% keywords = "TeX names",
+%%% supported = "yes",
+%%% docstring = "This style file for AmSTeX, LaTeX, and TeX
+%%% defines macros for the names of TeX
+%%% and METAFONT programs, in several
+%%% letter-case variants:
+%%%
+%%% \AMSTEX, \AMSTeX, \AmSTeX
+%%% \BIBTEX, \BIBTeX, \BibTeX
+%%% \LAMSTeX, \LAmSTeX
+%%% \LaTeX, \LATEX
+%%% \METAFONT, \MF
+%%% \SLITEX, \SLITeX, \SLiTeX, \SliTeX
+%%%
+%%% It will NOT redefine any macro that
+%%% already exists, so it can be included
+%%% harmlessly after other style files.
+%%%
+%%% In AmSTeX or Plain TeX, just do
+%%%
+%%% \input texnames.sty
+%%%
+%%% In LaTeX, do
+%%%
+%%% \documentstyle[...,texnames]{...}
+%%%
+%%% This file grew out of original work by
+%%%
+%%% Richard Furuta
+%%% Department of Computer Science
+%%% University of Maryland
+%%% College Park, MD 20742
+%%%
+%%% furuta@mimsy.umd.edu
+%%% seismo!umcp-cs!furuta
+%%%
+%%% 22 October 1986, first release (1.00)
+%%%
+%%% 1 April 1987 (1.01): Modified by William
+%%% LeFebvre, Rice University to include
+%%% definitions for BibTeX and SLiTeX, as they
+%%% appear in the LaTeX Local User's Guide
+%%% template (the file latex/local.tex in
+%%% standard distributions)
+%%%
+%%% 26 October 1991 (1.02): Modified by
+%%% Nelson H. F. Beebe <beebe@math.utah.edu> to
+%%% add several new macro names, and adapt for
+%%% use with Plain TeX and AmSTeX.
+%%%
+%%% 26 October 1991 (1.03): Add \LaTeX and
+%%% \LATEX
+%%%
+%%% 25 November 1991 (1.04): Add \LamSTeX
+%%% and \LAMSTeX
+%%%
+%%% 27 January 1991 (1.05 and 1.06): Add slanted
+%%% font support for \MF. Make several comment
+%%% changes. Add a couple of missing % at end
+%%% of line, and replace blank lines by empty
+%%% comments.
+%%%
+%%% 30 December 1992 (1.07): Use \TeX in
+%%% definitions of \BibTeX and \LaTeX. Remove
+%%% occurrences of \rm. Change \sc to use
+%%% \scriptfont instead of hardwiring cmcsc10.
+%%% Use \cal for \LAMSTeX.
+%%%
+%%% 1 March 1993 (1.08): Consolidate \ifx's onto
+%%% single lines for brevity. Add
+%%% \spacefactor1000 to definitions for \TeX and \MF.
+%%%
+%%% 16 March 1993 (1.09): Add \AmS, \AMS, \AmSLaTeX,
+%%% and \AMSLaTeX.
+%%%
+%%% 02 March 1998 (1.10): Add \LaTeXe.
+%%%
+%%% The checksum field above contains a CRC-16
+%%% checksum as the first value, followed by the
+%%% equivalent of the standard UNIX wc (word
+%%% count) utility output of lines, words, and
+%%% characters. This is produced by Robert
+%%% Solovay's checksum utility.",
+%%%
+%%% }
+%%% ====================================================================
+\ifx\sc\undefined
+ \def\sc{%
+ \expandafter\ifx\the\scriptfont\fam\nullfont
+ \font\temp = cmr7 \temp
+ \else
+ \the\scriptfont\fam
+ \fi
+ \def\uppercasesc{\char\uccode`}%
+ }%
+\fi
+\ifx\uppercasesc\undefined
+ \let\uppercasesc = \relax
+\fi
+\def\TeX{T\kern-.1667em\lower.5ex\hbox{E}\kern-.125emX\spacefactor1000 }%
+\ifx\AmS\undefined
+ \def\AmS{{\the\textfont2 A}\kern-.1667em\lower.5ex\hbox
+ {\the\textfont2 M}\kern-.125em{\the\textfont2 S}}
+\fi
+\ifx\AMS\undefined \let\AMS=\AmS \fi
+\ifx\AmSLaTeX\undefined
+ \def\AmSLaTeX{\AmS-\LaTeX}
+\fi
+\ifx\AMSLaTeX\undefined \let\AMSLaTeX=\AmSLaTeX \fi
+\ifx\AmSTeX\undefined
+ \def\AmSTeX{$\cal A$\kern-.1667em\lower.5ex\hbox{$\cal M$}%
+ \kern-.125em$\cal S$-\TeX}%
+\fi
+\ifx\AMSTEX\undefined \let\AMSTEX=\AmSTeX \fi
+\ifx\AMSTeX\undefined \let\AMSTeX=\AmSTeX \fi
+\ifx\BibTeX\undefined
+ \def\BibTeX{B{\sc \uppercasesc i\kern-.025em \uppercasesc b}\kern-.08em
+ \TeX}%
+\fi
+\ifx\BIBTeX\undefined \let\BIBTeX=\BibTeX \fi
+\ifx\BIBTEX\undefined \let\BIBTEX=\BibTeX \fi
+\ifx\LAMSTeX\undefined
+ \def\LAMSTeX{L\raise.42ex\hbox{\kern-.3em\the\scriptfont2 A}%
+ \kern-.2em\lower.376ex\hbox{\the\textfont2 M}%
+ \kern-.125em {\the\textfont2 S}-\TeX}%
+\fi
+\ifx\LamSTeX\undefined \let\LamSTeX=\LAMSTeX \fi
+\ifx\LAmSTeX\undefined \let\LAmSTeX=\LAMSTeX \fi
+\ifx\LaTeX\undefined
+ \def\LaTeX{L\kern-.36em\raise.3ex\hbox{\sc \uppercasesc a}\kern-.15em\TeX}%
+\fi
+\ifx\LATEX\undefined \let\LATEX=\LaTeX \fi
+\ifx\LaTeXe\undefined
+ \def\LaTeXe{\LaTeX{}\kern.05em2$_{\textstyle\varepsilon}$}
+\fi
+\ifx\MF\undefined
+ \ifx\manfnt\undefined
+ \font\manfnt=logo10
+ \fi
+ \ifx\manfntsl\undefined
+ \font\manfntsl=logosl10
+ \fi
+ \def\MF{{\ifdim\fontdimen1\font>0pt \let\manfnt = \manfntsl \fi
+ {\manfnt META}\-{\manfnt FONT}}\spacefactor1000 }%
+\fi
+\ifx\METAFONT\undefined \let\METAFONT=\MF \fi
+\ifx\SLITEX\undefined
+ \def\SLITEX{S\kern-.065em L\kern-.18em\raise.32ex\hbox{i}\kern-.03em\TeX}%
+\fi
+\ifx\SLiTeX\undefined \let\SLiTeX=\SLITEX \fi
+\ifx\SliTeX\undefined \let\SliTeX=\SLITEX \fi
+\ifx\SLITeX\undefined \let\SLITeX=\SLITEX \fi
+%%% @TeX-style-file
+%%% {
+%%% author = "Philip Taylor",
+%%% version = "3.05",
+%%% date = "7 April 2011",
+%%% time = "15:59:31 BST",
+%%% filename = "path.sty",
+%%% license = "Unlimited copying and redistribution of this
+%%% file are permitted as long as this file is
+%%% not modified. Modifications are permitted,
+%%% but only if the resulting file is not named
+%%% path.sty regardless of case",
+%%% address = "c/o The Hellenic Institute
+%%% Royal Holloway, University of London
+%%% Egham Hull, Egham
+%%% Surrey TW20 0EX
+%%% United Kingdom",
+%%% telephone = "Tel: +44 1622 820 735",
+%%% email = "P.Taylor@Rhul.Ac.Uk",
+%%% codetable = "ISO/ASCII",
+%%% keywords = "file name, filename, path name, pathname,
+%%% discretionary, discretionaries",
+%%% supported = "yes",
+%%% docstring = {Computer filenames, host names, and e-mail
+%%% addresses tend to be long strings that
+%%% cause line breaking problems for TeX.
+%%% Sometimes rather long strings are
+%%% encountered, such as:
+%%%
+%%% mighty-mouse-gw.scrc.symbolics.com
+%%%
+%%% This file defines a macro, \path|...|,
+%%% similar to LaTeX's \verb|...| macro, that
+%%% sets the text in the typewriter font,
+%%% allowing hyphen-less line breaks at
+%%% punctuation characters.
+%%%
+%%% The default set of punctuation characters is
+%%% defined as
+%%%
+%%% \discretionaries |~!@$%^&*()_+`-=#{"}[]:;'<>,.?\/|
+%%%
+%%% However, you can change it as needed, for
+%%% example
+%%%
+%%% \discretionaries +@%!.+
+%%%
+%%% would assign to it the set @ % ! . which
+%%% commonly occur in electronic mail addresses.
+%%%
+%%% The delimiter characters surrounding the
+%%% arguments to \discretionaries and \path
+%%% will normally be a punctuation character not
+%%% found in the argument, and not otherwise
+%%% significant to TeX. In particular, backslash
+%%% cannot be used as a delimiter. In the rare
+%%% event that this is required, set
+%%%
+%%% \specialpathdelimiterstrue
+%%%
+%%% This practice is not recommended, because TeX
+%%% then runs about four times slower while it is
+%%% typesetting \path\...\ requests.
+%%% \specialpathdelimitersfalse is the normal
+%%% setting.
+%%%
+%%% This file may be used in Plain TeX or AmSTeX
+%%% by
+%%%
+%%% \input path.sty
+%%%
+%%% and in LaTeX by
+%%%
+%%% \usepackage {path}
+%%%
+%%% The checksum field above, if present, contains
+%%% a CRC-16 checksum as the first value, followed
+%%% by the equivalent of the standard UNIX wc (word
+%%% count) utility output of lines, words, and
+%%% characters. This is produced by Robert
+%%% Solovay's checksum utility.
+%%% }
+%%% }
+%%% ====================================================================
+%%% The use of `\path' as a temporary control sequence is a kludge, but
+%%% it's a reasonably simple way to accomplish making @ a letter (to
+%%% provide ``concealed'' control sequences) without overwriting something
+%%% (without an `@' in its name) that might already be defined.
+\edef \path {\the \catcode `\@}%
+\catcode `\@ = 11
+\let \oldc@tcode = \path
+%%% Make commercial-at a letter to provide concealed control sequences
+\catcode `\@ = 11
+%%% and then declare two \count variables with concealed names
+\newcount \c@tcode
+\newcount \c@unter
+%%% and a boolean variable with an open name, to specify the nature of
+%%% the delimiters which will be associated with the \path command
+\newif \ifspecialpathdelimiters
+%%% If desired, you can define \pathafterhook to take
+\let \pathafterhook = \relax
+%%% We need to define control sequences which expand to both
+%%% active and passive spaces ...
+\begingroup
+\catcode `\ = 10
+\gdef \passivesp@ce { }
+\catcode `\ = 13\relax%
+\gdef\activesp@ce{ }%
+\endgroup
+%%% \discretionaries will define a macro \discr@ti@n@ri@s which will
+%%% make every character between the first and final <delim> a
+%%% discretionary breakpoint.
+\def \discretionaries %%% <delim> <chars> <delim>
+ {\begingroup
+ \c@tcodes = 13
+ \discr@tionaries
+ }
+%%% \discr@tionaries will receive as parameter the initial <delim>
+%%% which will delimit the set of discretionaries; this <delim>
+%%% will be active.
+\def \discr@tionaries #1%%% <delim>
+ {\def \discr@ti@naries ##1#1%%% <chars> <delim>
+ {\endgroup
+ \def \discr@ti@n@ries ####1%%% <char> or <delim>
+ {\if \noexpand ####1\noexpand #1%
+ \let \n@xt = \relax
+ \else
+ \catcode `####1 = 13
+ \def ####1{\discretionary
+ {\char `####1}{}{\char `####1}}%
+ \let \n@xt = \discr@ti@n@ries
+ \fi
+ \n@xt
+ }%
+ \def \discr@ti@n@ri@s {\discr@ti@n@ries ##1#1}%
+ }%
+ \discr@ti@naries
+ }
+%%% \path, which is the user interface to \p@th, first checks
+%%% to see whether \specialpathdelimiters is <true> or <false>;
+%%% if <true>, it needs to take special action to ensure that
+%%% \stress {all} characters (apart from <space>) are acceptable
+%%% as delimiters; this is very time-consuming, and should be
+%%% avoided if at all possible. It also defines \endp@th, to
+%%% close the appropriate number of groups, and finally transfers
+%%% control to \p@th
+\def \path
+ {\ifspecialpathdelimiters
+ \begingroup
+ \c@tcodes = 12
+ \def \endp@th {\endgroup \endgroup \pathafterhook}%
+ \else
+ \def \endp@th {\endgroup \pathafterhook}%
+ \fi
+ \p@th
+ }
+%%% \p@th, which has essentially the same syntax as \discretionaries,
+%%% expects to be followed by a <delim>, a <path>, and a second instance
+%%% of <delim>; it will typeset <path> in the \tt font with hyphenation
+%%% inhibited --- breaks (but not true hyphenation) are allowed at any
+%%% or all of the special characters which have
+%%% previously been declared as \discretionaries.
+\def \p@th #1%%% <delim>
+ {\begingroup
+ \tt
+ \c@tcode = \catcode `#1
+ \discr@ti@n@ri@s
+ \catcode `\ = \active
+ \expandafter \edef \activesp@ce {\passivesp@ce \hbox {}}%
+ \catcode `#1 = \c@tcode
+ \def \p@@th ##1#1% <chars> <delim>
+ {\leavevmode \hbox {}##1%
+ \endp@th
+ }%
+ \p@@th
+ }
+%%% \c@tcodes expects to be followed by the r-h-s of a numeric
+%%% assignment optionally including the assignment operator; it saves
+%%% the value of the r-h-s in \c@tcode, and invokes \c@tc@des.
+\def \c@tcodes {\afterassignment \c@tc@des \c@tcode}
+%%% \c@tc@des uses the value saved in \c@tcode, and assigns it to the
+%%% \catcode of all characters with the single exception of <space>,
+%%% which retains its normal catcode of 10; on exit, every single
+%%% character apart from <space> will have the catcode which followed
+%%% \c@tcodes. The code is optimised to avoid unnecessary usage of
+%%% save-stack space.
+\def \c@tc@des
+ {\c@unter = 0
+ \loop
+ \ifnum \catcode \c@unter = \c@tcode
+ \else
+ \catcode \c@unter = \c@tcode
+ \fi
+ \ifnum \c@unter < 255
+ \advance \c@unter by 1
+ \repeat
+ \catcode `\ = 10
+ }
+%%% We restore the original catcode of commercial-at
+\catcode `\@ = \oldc@tcode
+%%% Define a default set of discretionary break characters
+%%% to include all punctuation characters except vertical
+%%% bar
+\discretionaries |~!@$%^&*()_+`-=#{}[]:";'<>,.?\/|
+\ifx\eTeX\undefined
+ \def\eTeX{\hbox{\mathsurround=0pt $\varepsilon$-\kern-.125em\TeX}}%
+\fi
+\ifx\ExTeX\undefined
+ \def\ExTeX{\hbox{\mathsurround=0pt
+ $\textstyle\varepsilon_{\kern-0.15em\cal{X}}$\kern-.2em\TeX}}%
+\fi
+\def\eplain@Xe@reflect#1{%
+ \ifx\reflectbox\undefined
+ \errmessage{A graphics package must be loaded for \string\XeTeX}%
+ \else
+ \ifdim \fontdimen1\font>0pt
+ \raise 1.75ex \hbox{\kern.1em\rotatebox{180}{#1}}\kern-.1em
+ \else
+ \reflectbox{#1}%
+ \fi
+ \fi
+}%
+\def\eplain@Xe#1{\leavevmode
+ \smash{\hbox{X%
+ \setbox0=\hbox{\TeX}\setbox2=\hbox{E}%
+ \lower\dp0\hbox{\raise\dp2\hbox{\kern-.125em\eplain@Xe@reflect{E}}}%
+ \kern-.1667em #1}}}%
+\ifx\XeTeX\undefined
+ \def\XeTeX{\eplain@Xe\TeX}%
+\fi
+\ifx\XeLaTeX\undefined
+ \def\XeLaTeX{\eplain@Xe{\thinspace\LaTeX}}%
+\fi
+\def\blackbox{\vrule height .8ex width .6ex depth -.2ex \relax}% square bullet
+\def\makeblankbox#1#2{%
+ \ifvoid0
+ \errhelp = \@makeblankboxhelp
+ \errmessage{Box 0 is void}%
+ \fi
+ \hbox{\lower\dp0
+ \vbox{\hidehrule{#1}{#2}%
+ \kern -#1% overlap rules
+ \hbox to \wd0{\hidevrule{#1}{#2}%
+ \raise\ht0\vbox to #1{}% vrule height
+ \lower\dp0\vtop to #1{}% vrule depth
+ \hfil\hidevrule{#2}{#1}%
+ }%
+ \kern-#1\hidehrule{#2}{#1}%
+ }%
+ }%
+}%
+\newhelp\@makeblankboxhelp{Assigning to the dimensions of a void^^J%
+ box has no effect. Do `\string\setbox0=\string\null' before you^^J%
+ define its dimensions.}%
+\def\hidehrule#1#2{\kern-#1\hrule height#1 depth#2 \kern-#2}%
+\def\hidevrule#1#2{%
+ \kern-#1%
+ \dimen@=#1\advance\dimen@ by #2%
+ \vrule width\dimen@
+ \kern-#2%
+}%
+\newdimen\boxitspace \boxitspace = 3pt
+\long\def\boxit#1{%
+ \vbox{%
+ \ehrule
+ \hbox{%
+ \evrule
+ \kern\boxitspace
+ \vbox{\kern\boxitspace \parindent = 0pt #1\kern\boxitspace}%
+ \kern\boxitspace
+ \evrule
+ }%
+ \ehrule
+ }%
+}%
+\def\numbername#1{\ifcase#1%
+ zero%
+ \or one%
+ \or two%
+ \or three%
+ \or four%
+ \or five%
+ \or six%
+ \or seven%
+ \or eight%
+ \or nine%
+ \or ten%
+ \or #1%
+ \fi
+}%
+\let\@plainnewif = \newif
+\let\@plainnewdimen = \newdimen
+\let\newif = \innernewif
+\let\newdimen = \innernewdimen
+\edef\@eplainoldandcode{\the\catcode`& }%
+\catcode`& = 11
+\toks0 = {%
+\edef\thinlines{\the\catcode`@ }%
+\catcode`@ = 11
+\let\@oldatcatcode = \thinlines
+\def\smash@@{\relax % \relax, in case this comes first in \halign
+ \ifmmode\def\next{\mathpalette\mathsm@sh}\else\let\next\makesm@sh
+ \fi\next}
+\def\makesm@sh#1{\setbox\z@\hbox{#1}\finsm@sh}
+\def\mathsm@sh#1#2{\setbox\z@\hbox{$\m@th#1{#2}$}\finsm@sh}
+\def\finsm@sh{\ht\z@\z@ \dp\z@\z@ \box\z@}
+\edef\@oldandcatcode{\the\catcode`& }%
+\catcode`& = 11
+\def\&whilenoop#1{}%
+\def\&whiledim#1\do #2{\ifdim #1\relax#2\&iwhiledim{#1\relax#2}\fi}%
+\def\&iwhiledim#1{\ifdim #1\let\&nextwhile=\&iwhiledim
+ \else\let\&nextwhile=\&whilenoop\fi\&nextwhile{#1}}%
+\newif\if&negarg
+\newdimen\&wholewidth
+\newdimen\&halfwidth
+\font\tenln=line10
+\def\thinlines{\let\&linefnt\tenln \let\&circlefnt\tencirc
+ \&wholewidth\fontdimen8\tenln \&halfwidth .5\&wholewidth}%
+\def\thicklines{\let\&linefnt\tenlnw \let\&circlefnt\tencircw
+ \&wholewidth\fontdimen8\tenlnw \&halfwidth .5\&wholewidth}%
+\def\drawline(#1,#2)#3{\&xarg #1\relax \&yarg #2\relax \&linelen=#3\relax
+ \ifnum\&xarg =0 \&vline \else \ifnum\&yarg =0 \&hline \else \&sline\fi\fi}%
+\def\&sline{\leavevmode
+ \ifnum\&xarg< 0 \&negargtrue \&xarg -\&xarg \&yyarg -\&yarg
+ \else \&negargfalse \&yyarg \&yarg \fi
+ \ifnum \&yyarg >0 \&tempcnta\&yyarg \else \&tempcnta -\&yyarg \fi
+ \ifnum\&tempcnta>6 \&badlinearg \&yyarg0 \fi
+ \ifnum\&xarg>6 \&badlinearg \&xarg1 \fi
+ \setbox\&linechar\hbox{\&linefnt\&getlinechar(\&xarg,\&yyarg)}%
+ \ifnum \&yyarg >0 \let\&upordown\raise \&clnht\z@
+ \else\let\&upordown\lower \&clnht \ht\&linechar\fi
+ \&clnwd=\wd\&linechar
+ \&whiledim \&clnwd <\&linelen \do {%
+ \&upordown\&clnht\copy\&linechar
+ \advance\&clnht \ht\&linechar
+ \advance\&clnwd \wd\&linechar
+ }%
+ \advance\&clnht -\ht\&linechar
+ \advance\&clnwd -\wd\&linechar
+ \&tempdima\&linelen\advance\&tempdima -\&clnwd
+ \&tempdimb\&tempdima\advance\&tempdimb -\wd\&linechar
+ \hskip\&tempdimb \multiply\&tempdima \@m
+ \&tempcnta \&tempdima \&tempdima \wd\&linechar \divide\&tempcnta \&tempdima
+ \&tempdima \ht\&linechar \multiply\&tempdima \&tempcnta
+ \divide\&tempdima \@m
+ \advance\&clnht \&tempdima
+ \ifdim \&linelen <\wd\&linechar \hskip \wd\&linechar
+ \else\&upordown\&clnht\copy\&linechar\fi}%
+\def\&hline{\vrule height \&halfwidth depth \&halfwidth width \&linelen}%
+\def\&getlinechar(#1,#2){\&tempcnta#1\relax\multiply\&tempcnta 8
+ \advance\&tempcnta -9 \ifnum #2>0 \advance\&tempcnta #2\relax\else
+ \advance\&tempcnta -#2\relax\advance\&tempcnta 64 \fi
+ \char\&tempcnta}%
+\def\drawvector(#1,#2)#3{\&xarg #1\relax \&yarg #2\relax
+ \&tempcnta \ifnum\&xarg<0 -\&xarg\else\&xarg\fi
+ \ifnum\&tempcnta<5\relax \&linelen=#3\relax
+ \ifnum\&xarg =0 \&vvector \else \ifnum\&yarg =0 \&hvector
+ \else \&svector\fi\fi\else\&badlinearg\fi}%
+\def\&hvector{\ifnum\&xarg<0 \rlap{\&linefnt\&getlarrow(1,0)}\fi \&hline
+ \ifnum\&xarg>0 \llap{\&linefnt\&getrarrow(1,0)}\fi}%
+\def\&vvector{\ifnum \&yarg <0 \&downvector \else \&upvector \fi}%
+\def\&svector{\&sline
+ \&tempcnta\&yarg \ifnum\&tempcnta <0 \&tempcnta=-\&tempcnta\fi
+ \ifnum\&tempcnta <5
+ \if&negarg\ifnum\&yarg>0 % 3d quadrant; dp > 0
+ \llap{\lower\ht\&linechar\hbox to\&linelen{\&linefnt
+ \&getlarrow(\&xarg,\&yyarg)\hss}}\else % 4th quadrant; ht > 0
+ \llap{\hbox to\&linelen{\&linefnt\&getlarrow(\&xarg,\&yyarg)\hss}}\fi
+ \else\ifnum\&yarg>0 % 1st quadrant; ht > 0
+ \&tempdima\&linelen \multiply\&tempdima\&yarg
+ \divide\&tempdima\&xarg \advance\&tempdima-\ht\&linechar
+ \raise\&tempdima\llap{\&linefnt\&getrarrow(\&xarg,\&yyarg)}\else
+ \&tempdima\&linelen \multiply\&tempdima-\&yarg % 2d quadrant; dp > 0
+ \divide\&tempdima\&xarg
+ \lower\&tempdima\llap{\&linefnt\&getrarrow(\&xarg,\&yyarg)}\fi\fi
+ \else\&badlinearg\fi}%
+\def\&getlarrow(#1,#2){\ifnum #2 =\z@ \&tempcnta='33\else
+\&tempcnta=#1\relax\multiply\&tempcnta \sixt@@n \advance\&tempcnta
+-9 \&tempcntb=#2\relax\multiply\&tempcntb \tw@
+\ifnum \&tempcntb >0 \advance\&tempcnta \&tempcntb\relax
+\else\advance\&tempcnta -\&tempcntb\advance\&tempcnta 64
+\fi\fi\char\&tempcnta}%
+\def\&getrarrow(#1,#2){\&tempcntb=#2\relax
+\ifnum\&tempcntb < 0 \&tempcntb=-\&tempcntb\relax\fi
+\ifcase \&tempcntb\relax \&tempcnta='55 \or
+\ifnum #1<3 \&tempcnta=#1\relax\multiply\&tempcnta
+24 \advance\&tempcnta -6 \else \ifnum #1=3 \&tempcnta=49
+\else\&tempcnta=58 \fi\fi\or
+\ifnum #1<3 \&tempcnta=#1\relax\multiply\&tempcnta
+24 \advance\&tempcnta -3 \else \&tempcnta=51\fi\or
+\&tempcnta=#1\relax\multiply\&tempcnta
+\sixt@@n \advance\&tempcnta -\tw@ \else
+\&tempcnta=#1\relax\multiply\&tempcnta
+\sixt@@n \advance\&tempcnta 7 \fi\ifnum #2<0 \advance\&tempcnta 64 \fi
+\char\&tempcnta}%
+\def\&vline{\ifnum \&yarg <0 \&downline \else \&upline\fi}%
+\def\&upline{\hbox to \z@{\hskip -\&halfwidth \vrule width \&wholewidth
+ height \&linelen depth \z@\hss}}%
+\def\&downline{\hbox to \z@{\hskip -\&halfwidth \vrule width \&wholewidth
+ height \z@ depth \&linelen \hss}}%
+\def\&upvector{\&upline\setbox\&tempboxa\hbox{\&linefnt\char'66}\raise
+ \&linelen \hbox to\z@{\lower \ht\&tempboxa\box\&tempboxa\hss}}%
+\def\&downvector{\&downline\lower \&linelen
+ \hbox to \z@{\&linefnt\char'77\hss}}%
+\def\&badlinearg{\errmessage{Bad \string\arrow\space argument.}}%
+\thinlines
+\countdef\&xarg 0
+\countdef\&yarg 2
+\countdef\&yyarg 4
+\countdef\&tempcnta 6
+\countdef\&tempcntb 8
+\dimendef\&linelen 0
+\dimendef\&clnwd 2
+\dimendef\&clnht 4
+\dimendef\&tempdima 6
+\dimendef\&tempdimb 8
+\chardef\@arrbox 0
+\chardef\&linechar 2
+\chardef\&tempboxa 2 % \&linechar and \&tempboxa don't interfere.
+\let\lft^%
+\let\rt_% distinguish between \rt and \lft
+\newif\if@pslope % test for positive slope
+\def\@findslope(#1,#2){\ifnum#1>0
+ \ifnum#2>0 \@pslopetrue \else\@pslopefalse\fi \else
+ \ifnum#2>0 \@pslopefalse \else\@pslopetrue\fi\fi}%
+\def\generalsmap(#1,#2){\getm@rphposn(#1,#2)\plnmorph\futurelet\next\addm@rph}%
+\def\sline(#1,#2){\setbox\@arrbox=\hbox{\drawline(#1,#2){\sarrowlength}}%
+ \@findslope(#1,#2)\d@@blearrfalse\generalsmap(#1,#2)}%
+\def\arrow(#1,#2){\setbox\@arrbox=\hbox{\drawvector(#1,#2){\sarrowlength}}%
+ \@findslope(#1,#2)\d@@blearrfalse\generalsmap(#1,#2)}%
+\newif\ifd@@blearr
+\def\bisline(#1,#2){\@findslope(#1,#2)%
+ \if@pslope \let\@upordown\raise \else \let\@upordown\lower\fi
+ \getch@nnel(#1,#2)\setbox\@arrbox=\hbox{\@upordown\@vchannel
+ \rlap{\drawline(#1,#2){\sarrowlength}}%
+ \hskip\@hchannel\hbox{\drawline(#1,#2){\sarrowlength}}}%
+ \d@@blearrtrue\generalsmap(#1,#2)}%
+\def\biarrow(#1,#2){\@findslope(#1,#2)%
+ \if@pslope \let\@upordown\raise \else \let\@upordown\lower\fi
+ \getch@nnel(#1,#2)\setbox\@arrbox=\hbox{\@upordown\@vchannel
+ \rlap{\drawvector(#1,#2){\sarrowlength}}%
+ \hskip\@hchannel\hbox{\drawvector(#1,#2){\sarrowlength}}}%
+ \d@@blearrtrue\generalsmap(#1,#2)}%
+\def\adjarrow(#1,#2){\@findslope(#1,#2)%
+ \if@pslope \let\@upordown\raise \else \let\@upordown\lower\fi
+ \getch@nnel(#1,#2)\setbox\@arrbox=\hbox{\@upordown\@vchannel
+ \rlap{\drawvector(#1,#2){\sarrowlength}}%
+ \hskip\@hchannel\hbox{\drawvector(-#1,-#2){\sarrowlength}}}%
+ \d@@blearrtrue\generalsmap(#1,#2)}%
+\newif\ifrtm@rph
+\def\@shiftmorph#1{\hbox{\setbox0=\hbox{$\scriptstyle#1$}%
+ \setbox1=\hbox{\hskip\@hm@rphshift\raise\@vm@rphshift\copy0}%
+ \wd1=\wd0 \ht1=\ht0 \dp1=\dp0 \box1}}%
+\def\@hm@rphshift{\ifrtm@rph
+ \ifdim\hmorphposnrt=\z@\hmorphposn\else\hmorphposnrt\fi \else
+ \ifdim\hmorphposnlft=\z@\hmorphposn\else\hmorphposnlft\fi \fi}%
+\def\@vm@rphshift{\ifrtm@rph
+ \ifdim\vmorphposnrt=\z@\vmorphposn\else\vmorphposnrt\fi \else
+ \ifdim\vmorphposnlft=\z@\vmorphposn\else\vmorphposnlft\fi \fi}%
+\def\addm@rph{\ifx\next\lft\let\temp=\lftmorph\else
+ \ifx\next\rt\let\temp=\rtmorph\else\let\temp\relax\fi\fi \temp}%
+\def\plnmorph{\dimen1\wd\@arrbox \ifdim\dimen1<\z@ \dimen1-\dimen1\fi
+ \vcenter{\box\@arrbox}}%
+\def\lftmorph\lft#1{\rtm@rphfalse \setbox0=\@shiftmorph{#1}%
+ \if@pslope \let\@upordown\raise \else \let\@upordown\lower\fi
+ \llap{\@upordown\@vmorphdflt\hbox to\dimen1{\hss % \dimen1=\wd\@arrbox
+ \llap{\box0}\hss}\hskip\@hmorphdflt}\futurelet\next\addm@rph}%
+\def\rtmorph\rt#1{\rtm@rphtrue \setbox0=\@shiftmorph{#1}%
+ \if@pslope \let\@upordown\lower \else \let\@upordown\raise\fi
+ \llap{\@upordown\@vmorphdflt\hbox to\dimen1{\hss
+ \rlap{\box0}\hss}\hskip-\@hmorphdflt}\futurelet\next\addm@rph}%
+\def\getm@rphposn(#1,#2){\ifd@@blearr \dimen@\morphdist \advance\dimen@ by
+ .5\channelwidth \@getshift(#1,#2){\@hmorphdflt}{\@vmorphdflt}{\dimen@}\else
+ \@getshift(#1,#2){\@hmorphdflt}{\@vmorphdflt}{\morphdist}\fi}%
+\def\getch@nnel(#1,#2){\ifdim\hchannel=\z@ \ifdim\vchannel=\z@
+ \@getshift(#1,#2){\@hchannel}{\@vchannel}{\channelwidth}%
+ \else \@hchannel\hchannel \@vchannel\vchannel \fi
+ \else \@hchannel\hchannel \@vchannel\vchannel \fi}%
+\def\@getshift(#1,#2)#3#4#5{\dimen@ #5\relax
+ \&xarg #1\relax \&yarg #2\relax
+ \ifnum\&xarg<0 \&xarg -\&xarg \fi
+ \ifnum\&yarg<0 \&yarg -\&yarg \fi
+ \ifnum\&xarg<\&yarg \&negargtrue \&yyarg\&xarg \&xarg\&yarg \&yarg\&yyarg\fi
+ \ifcase\&xarg \or % There is no case 0
+ \ifcase\&yarg % case 1
+ \dimen@i \z@ \dimen@ii \dimen@ \or % case (1,0)
+ \dimen@i .7071\dimen@ \dimen@ii .7071\dimen@ \fi \or
+ \ifcase\&yarg % case 2
+ \or % case 0,2 wrong
+ \dimen@i .4472\dimen@ \dimen@ii .8944\dimen@ \fi \or
+ \ifcase\&yarg % case 3
+ \or % case 0,3 wrong
+ \dimen@i .3162\dimen@ \dimen@ii .9486\dimen@ \or
+ \dimen@i .5547\dimen@ \dimen@ii .8321\dimen@ \fi \or
+ \ifcase\&yarg % case 4
+ \or % case 0,2,4 wrong
+ \dimen@i .2425\dimen@ \dimen@ii .9701\dimen@ \or\or
+ \dimen@i .6\dimen@ \dimen@ii .8\dimen@ \fi \or
+ \ifcase\&yarg % case 5
+ \or % case 0,5 wrong
+ \dimen@i .1961\dimen@ \dimen@ii .9801\dimen@ \or
+ \dimen@i .3714\dimen@ \dimen@ii .9284\dimen@ \or
+ \dimen@i .5144\dimen@ \dimen@ii .8575\dimen@ \or
+ \dimen@i .6247\dimen@ \dimen@ii .7801\dimen@ \fi \or
+ \ifcase\&yarg % case 6
+ \or % case 0,2,3,4,6 wrong
+ \dimen@i .1645\dimen@ \dimen@ii .9864\dimen@ \or\or\or\or
+ \dimen@i .6402\dimen@ \dimen@ii .7682\dimen@ \fi \fi
+ \if&negarg \&tempdima\dimen@i \dimen@i\dimen@ii \dimen@ii\&tempdima\fi
+ #3\dimen@i\relax #4\dimen@ii\relax }%
+\catcode`\&=4 % Back to alignment tab
+}%
+\catcode`& = 4
+\toks2 = {%
+\catcode`\&=4 % Back to alignment tab
+\def\generalhmap{\futurelet\next\@generalhmap}%
+\def\@generalhmap{\ifx\next^ \let\temp\generalhm@rph\else
+ \ifx\next_ \let\temp\generalhm@rph\else \let\temp\m@kehmap\fi\fi \temp}%
+\def\generalhm@rph#1#2{\ifx#1^
+ \toks@=\expandafter{\the\toks@#1{\rtm@rphtrue\@shiftmorph{#2}}}\else
+ \toks@=\expandafter{\the\toks@#1{\rtm@rphfalse\@shiftmorph{#2}}}\fi
+ \generalhmap}%
+\def\m@kehmap{\mathrel{\smash@@{\the\toks@}}}%
+\def\mapright{\toks@={\mathop{\vcenter{\smash@@{\drawrightarrow}}}\limits}%
+ \generalhmap}%
+\def\mapleft{\toks@={\mathop{\vcenter{\smash@@{\drawleftarrow}}}\limits}%
+ \generalhmap}%
+\def\bimapright{\toks@={\mathop{\vcenter{\smash@@{\drawbirightarrow}}}\limits}%
+ \generalhmap}%
+\def\bimapleft{\toks@={\mathop{\vcenter{\smash@@{\drawbileftarrow}}}\limits}%
+ \generalhmap}%
+\def\adjmapright{\toks@={\mathop{\vcenter{\smash@@{\drawadjrightarrow}}}\limits}%
+ \generalhmap}%
+\def\adjmapleft{\toks@={\mathop{\vcenter{\smash@@{\drawadjleftarrow}}}\limits}%
+ \generalhmap}%
+\def\hline{\toks@={\mathop{\vcenter{\smash@@{\drawhline}}}\limits}%
+ \generalhmap}%
+\def\bihline{\toks@={\mathop{\vcenter{\smash@@{\drawbihline}}}\limits}%
+ \generalhmap}%
+\def\drawrightarrow{\hbox{\drawvector(1,0){\harrowlength}}}%
+\def\drawleftarrow{\hbox{\drawvector(-1,0){\harrowlength}}}%
+\def\drawbirightarrow{\hbox{\raise.5\channelwidth
+ \hbox{\drawvector(1,0){\harrowlength}}\lower.5\channelwidth
+ \llap{\drawvector(1,0){\harrowlength}}}}%
+\def\drawbileftarrow{\hbox{\raise.5\channelwidth
+ \hbox{\drawvector(-1,0){\harrowlength}}\lower.5\channelwidth
+ \llap{\drawvector(-1,0){\harrowlength}}}}%
+\def\drawadjrightarrow{\hbox{\raise.5\channelwidth
+ \hbox{\drawvector(-1,0){\harrowlength}}\lower.5\channelwidth
+ \llap{\drawvector(1,0){\harrowlength}}}}%
+\def\drawadjleftarrow{\hbox{\raise.5\channelwidth
+ \hbox{\drawvector(1,0){\harrowlength}}\lower.5\channelwidth
+ \llap{\drawvector(-1,0){\harrowlength}}}}%
+\def\drawhline{\hbox{\drawline(1,0){\harrowlength}}}%
+\def\drawbihline{\hbox{\raise.5\channelwidth
+ \hbox{\drawline(1,0){\harrowlength}}\lower.5\channelwidth
+ \llap{\drawline(1,0){\harrowlength}}}}%
+\def\generalvmap{\futurelet\next\@generalvmap}%
+\def\@generalvmap{\ifx\next\lft \let\temp\generalvm@rph\else
+ \ifx\next\rt \let\temp\generalvm@rph\else \let\temp\m@kevmap\fi\fi \temp}%
+\toksdef\toks@@=1
+\def\generalvm@rph#1#2{\ifx#1\rt % append
+ \toks@=\expandafter{\the\toks@
+ \rlap{$\vcenter{\rtm@rphtrue\@shiftmorph{#2}}$}}\else % prepend
+ \toks@@={\llap{$\vcenter{\rtm@rphfalse\@shiftmorph{#2}}$}}%
+ \toks@=\expandafter\expandafter\expandafter{\expandafter\the\expandafter
+ \toks@@ \the\toks@}\fi \generalvmap}%
+\def\m@kevmap{\the\toks@}%
+\def\mapdown{\toks@={\vcenter{\drawdownarrow}}\generalvmap}%
+\def\mapup{\toks@={\vcenter{\drawuparrow}}\generalvmap}%
+\def\bimapdown{\toks@={\vcenter{\drawbidownarrow}}\generalvmap}%
+\def\bimapup{\toks@={\vcenter{\drawbiuparrow}}\generalvmap}%
+\def\adjmapdown{\toks@={\vcenter{\drawadjdownarrow}}\generalvmap}%
+\def\adjmapup{\toks@={\vcenter{\drawadjuparrow}}\generalvmap}%
+\def\vline{\toks@={\vcenter{\drawvline}}\generalvmap}%
+\def\bivline{\toks@={\vcenter{\drawbivline}}\generalvmap}%
+\def\drawdownarrow{\hbox to5pt{\hss\drawvector(0,-1){\varrowlength}\hss}}%
+\def\drawuparrow{\hbox to5pt{\hss\drawvector(0,1){\varrowlength}\hss}}%
+\def\drawbidownarrow{\hbox to5pt{\hss\hbox{\drawvector(0,-1){\varrowlength}}%
+ \hskip\channelwidth\hbox{\drawvector(0,-1){\varrowlength}}\hss}}%
+\def\drawbiuparrow{\hbox to5pt{\hss\hbox{\drawvector(0,1){\varrowlength}}%
+ \hskip\channelwidth\hbox{\drawvector(0,1){\varrowlength}}\hss}}%
+\def\drawadjdownarrow{\hbox to5pt{\hss\hbox{\drawvector(0,-1){\varrowlength}}%
+ \hskip\channelwidth\lower\varrowlength
+ \hbox{\drawvector(0,1){\varrowlength}}\hss}}%
+\def\drawadjuparrow{\hbox to5pt{\hss\hbox{\drawvector(0,1){\varrowlength}}%
+ \hskip\channelwidth\raise\varrowlength
+ \hbox{\drawvector(0,-1){\varrowlength}}\hss}}%
+\def\drawvline{\hbox to5pt{\hss\drawline(0,1){\varrowlength}\hss}}%
+\def\drawbivline{\hbox to5pt{\hss\hbox{\drawline(0,1){\varrowlength}}%
+ \hskip\channelwidth\hbox{\drawline(0,1){\varrowlength}}\hss}}%
+\def\commdiag#1{\null\,
+ \vcenter{\commdiagbaselines
+ \m@th\ialign{\hfil$##$\hfil&&\hfil$\mkern4mu ##$\hfil\crcr
+ \mathstrut\crcr\noalign{\kern-\baselineskip}
+ #1\crcr\mathstrut\crcr\noalign{\kern-\baselineskip}}}\,}%
+\def\commdiagbaselines{\baselineskip15pt \lineskip3pt \lineskiplimit3pt }%
+\def\gridcommdiag#1{\null\,
+ \vcenter{\offinterlineskip
+ \m@th\ialign{&\vbox to\vgrid{\vss
+ \hbox to\hgrid{\hss\smash@@{$##$}\hss}}\crcr
+ \mathstrut\crcr\noalign{\kern-\vgrid}
+ #1\crcr\mathstrut\crcr\noalign{\kern-.5\vgrid}}}\,}%
+\newdimen\harrowlength \harrowlength=60pt
+\newdimen\varrowlength \varrowlength=.618\harrowlength
+\newdimen\sarrowlength \sarrowlength=\harrowlength
+\newdimen\hmorphposn \hmorphposn=\z@
+\newdimen\vmorphposn \vmorphposn=\z@
+\newdimen\morphdist \morphdist=4pt
+\dimendef\@hmorphdflt 0 % These two dimensions are
+\dimendef\@vmorphdflt 2 % defined by \getm@rphposn
+\newdimen\hmorphposnrt \hmorphposnrt=\z@
+\newdimen\hmorphposnlft \hmorphposnlft=\z@
+\newdimen\vmorphposnrt \vmorphposnrt=\z@
+\newdimen\vmorphposnlft \vmorphposnlft=\z@
+\let\hmorphposnup=\hmorphposnrt
+\let\hmorphposndn=\hmorphposnlft
+\let\vmorphposnup=\vmorphposnrt
+\let\vmorphposndn=\vmorphposnlft
+\newdimen\hgrid \hgrid=15pt
+\newdimen\vgrid \vgrid=15pt
+\newdimen\hchannel \hchannel=0pt
+\newdimen\vchannel \vchannel=0pt
+\newdimen\channelwidth \channelwidth=3pt
+\dimendef\@hchannel 0 % Defined via the
+\dimendef\@vchannel 2 % macro \getch@nnel
+\catcode`& = \@oldandcatcode
+\catcode`@ = \@oldatcatcode
+}%
+\let\newif = \@plainnewif
+\let\newdimen = \@plainnewdimen
+\ifx\noarrow\@undefined \the\toks0 \the\toks2 \fi
+\catcode`& = \@eplainoldandcode
+\def\environment#1{%
+ \ifx\@groupname\@undefined\else
+ \errhelp = \@unnamedendgrouphelp
+ \errmessage{`\@groupname' was not closed by \string\endenvironment}%
+ \fi
+ \edef\@groupname{#1}%
+ \begingroup
+ \let\@groupname = \@undefined
+}%
+\def\endenvironment#1{%
+ \endgroup
+ \edef\@thearg{#1}%
+ \ifx\@groupname\@thearg
+ \else
+ \ifx\@groupname\@undefined
+ \errhelp = \@isolatedendenvironmenthelp
+ \errmessage{Isolated \string\endenvironment\space for `#1'}%
+ \else
+ \errhelp = \@mismatchedenvironmenthelp
+ \errmessage{Environment `#1' ended, but `\@groupname' started}%
+ \endgroup % Probably a typo in the names.
+ \fi
+ \fi
+ \let\@groupname = \@undefined
+}%
+\newhelp\@unnamedendgrouphelp{Most likely, you just forgot an^^J%
+ \string\endenvironment. Maybe you should try inserting another^^J%
+ \string\endgroup to recover.}%
+\newhelp\@isolatedendenvironmenthelp{You ended an environment X, but^^J%
+ no \string\environment{X} to start it is anywhere in sight.^^J%
+ You might also be at an \string\endenvironment\space that would match^^J%
+ a \string\begingroup, i.e., you forgot an \string\endgroup.}%
+\newhelp\@mismatchedenvironmenthelp{You started an environment named X, but^^J%
+ you ended one named Y. Maybe you made a typo in one^^J%
+ or the other of the names?}%
+\newif\ifenvironment
+\def\checkenv{\ifenvironment \errhelp = \@interwovenenvhelp
+ \errmessage{Interwoven environments}%
+ \egroup \fi
+}%
+\newhelp\@interwovenenvhelp{Perhaps you forgot to end the previous^^J%
+ environment? I'm finishing off the current group,^^J%
+ hoping that will fix it.}%
+\newtoks\previouseverydisplay
+\let\@leftleftfill\relax % as it was
+\newdimen\leftdisplayindent \leftdisplayindent=\parindent
+\newif\if@leftdisplays
+\def\leftdisplays{%
+ \if@leftdisplays\else
+ \previouseverydisplay = \everydisplay
+ \everydisplay = {\the\previouseverydisplay \leftdisplaysetup}%
+ \let\@save@maybedisableeqno = \@maybedisableeqno
+ \let\@saveeqno = \eqno
+ \let\@saveleqno = \leqno
+ \let\@saveeqalignno = \eqalignno
+ \let\@saveleqalignno = \leqalignno
+ \let\@maybedisableeqno = \relax
+ \def\eqno{\hfill\textstyle\enspace}%
+ \def\leqno{%
+ \hfill
+ \hbox to0pt\bgroup
+ \kern-\displaywidth
+ \kern-\leftdisplayindent % I'll use just \leftdisplayindent
+ $\aftergroup\@leftleqnoend % inserted after ending $
+ }%
+ \@redefinealignmentdisplays
+ \@leftdisplaystrue
+ \fi
+}%
+\newbox\@lignbox
+\newdimen\disprevdepth
+\def\centereddisplays{%
+ \if@leftdisplays
+ \everydisplay = \previouseverydisplay
+ \let\@maybedisableeqno = \@save@maybedisableeqno
+ \let\eqno = \@saveeqno
+ \let\leqno = \@saveleqno
+ \let\eqalignno = \@saveeqalignno
+ \let\leqalignno = \@saveleqalignno
+ \@leftdisplaysfalse
+ \fi
+}%
+\def\leftdisplaysetup{%
+ \dimen@ = \leftdisplayindent
+ \advance\dimen@ by \leftskip
+ \advance\displayindent by \dimen@
+ \advance\displaywidth by -\dimen@
+ \halign\bgroup##\cr \noalign\bgroup
+ \disprevdepth = \prevdepth
+ \setbox\z@ = \hbox to\displaywidth\bgroup
+ $\displaystyle
+ \aftergroup\@lefteqend % inserted after ending $
+}
+\def\@lefteqend{% gets inserted between the ending $$
+ \hfil\egroup% end box 0
+ \@putdisplay}
+\def\@leftleqnoend{\hss \egroup $}% end the \hbox to 0pt for \leqno, restore $
+\def\@putdisplay{%
+ \ifvoid\@lignbox % Ordinary display; use it.
+ \moveright\displayindent\box\z@
+ \else % alignment display; unwrap alignment
+ \prevdepth = \dp\@lignbox % affects the skip *below*
+ \unvbox\@lignbox
+ \fi
+ \egroup\egroup % end \noalign, end outer \halign
+ $% restore first $ of trailing $$
+}
+\def\@redefinealignmentdisplays{%
+ \def\displaylines##1{
+ \global\setbox\@lignbox\vbox{%
+ \prevdepth = \disprevdepth
+ \displ@y
+ \tabskip\displayindent
+ \halign{\hbox to\displaywidth
+ {$\@lign\displaystyle####\hfil$\hfil}\crcr
+ ##1\crcr}}}%
+ \def\eqalignno##1{%
+ \def\eqno{&}%
+ \def\leqno{&}%
+ \global\setbox\@lignbox\vbox{%
+ \prevdepth = \disprevdepth
+ \displ@y
+ \advance\displaywidth by \displayindent
+ \tabskip\displayindent
+ \halign to\displaywidth{%
+ \hfil $\@lign\displaystyle{####}$\@leftleftfill\tabskip\z@skip
+ &$\@lign\displaystyle{{}####}$\hfil\tabskip\centering
+ &\llap{$\@lign####$}\tabskip\z@skip\crcr
+ ##1\crcr}}}%
+ \def\leqalignno##1{%
+ \def\eqno{&}%
+ \def\leqno{&}%
+ \global\setbox\@lignbox\vbox{%
+ \prevdepth = \disprevdepth
+ \displ@y
+ \advance\displaywidth by \displayindent
+ \tabskip\displayindent
+ \halign to\displaywidth{%
+ \hfil $\@lign\displaystyle{####}$\@leftleftfill\tabskip\z@skip
+ &$\@lign\displaystyle{{}####}$\hfil\tabskip\centering
+ &\kern-\displaywidth
+ \rlap{\kern\displayindent \kern-\leftdisplayindent$\@lign####$}%
+ \tabskip\displaywidth\crcr
+ ##1\crcr}}}%
+}%
+\let\@primitivenoalign = \noalign
+\newtoks\@everynoalign
+\def\@lefteqalignonoalign#1{%
+ \@primitivenoalign{%
+ \advance\leftskip by -\parindent
+ \advance\leftskip by -\leftdisplayindent
+ \parskip = 0pt
+ \parindent = 0pt
+ \the\@everynoalign
+ #1%
+ }%
+}%
+\def\monthname{%
+ \ifcase\month
+ \or Jan\or Feb\or Mar\or Apr\or May\or Jun%
+ \or Jul\or Aug\or Sep\or Oct\or Nov\or Dec%
+ \fi
+}%
+\def\fullmonthname{%
+ \ifcase\month
+ \or January\or February\or March\or April\or May\or June%
+ \or July\or August\or September\or October\or November\or December%
+ \fi
+}%
+\def\timestring{\begingroup
+ \count0 = \time
+ \divide\count0 by 60
+ \count2 = \count0 % The hour, from zero to 23.
+ \count4 = \time
+ \multiply\count0 by 60
+ \advance\count4 by -\count0 % The minute, from zero to 59.
+ \ifnum\count4<10
+ \toks1 = {0}%
+ \else
+ \toks1 = {}%
+ \fi
+ \ifnum\count2<12
+ \toks0 = {a.m.}%
+ \else
+ \toks0 = {p.m.}%
+ \advance\count2 by -12
+ \fi
+ \ifnum\count2=0
+ \count2 = 12
+ \fi
+ \number\count2:\the\toks1 \number\count4 \thinspace \the\toks0
+\endgroup}%
+\def\timestamp{\number\day\space\monthname\space\number\year\quad\timestring}%
+\def\today{\the\day\ \fullmonthname\ \the\year}%
+\newskip\abovelistskipamount \abovelistskipamount = .5\baselineskip
+ \newcount\abovelistpenalty \abovelistpenalty = 10000
+ \def\abovelistskip{\vpenalty\abovelistpenalty \vskip\abovelistskipamount}%
+\newskip\interitemskipamount \interitemskipamount = 0pt
+ \newcount\belowlistpenalty \belowlistpenalty = -50
+ \def\belowlistskip{\vpenalty\belowlistpenalty \vskip\belowlistskipamount}%
+\newskip\belowlistskipamount \belowlistskipamount = .5\baselineskip
+ \newcount\interitempenalty \interitempenalty = 0
+ \def\interitemskip{\vpenalty\interitempenalty \vskip\interitemskipamount}%
+\newdimen\listleftindent \listleftindent = 0pt
+\newdimen\listrightindent \listrightindent = 0pt
+\let\listmarkerspace = \enspace
+\newtoks\everylist
+\def\listcompact{\interitemskipamount = 0pt \relax}%
+\newdimen\@listindent
+\def\beginlist{%
+ \abovelistskip
+ \@listindent = \parindent
+ \advance\@listindent by \listleftindent
+ \advance\leftskip by \@listindent
+ \advance\rightskip by \listrightindent
+ \itemnumber = 1
+ \the\everylist
+}%
+\def\li{\@getoptionalarg\@finli}%
+\def\@finli{%
+ \let\@lioptarg\@optionalarg
+ \ifx\@lioptarg\empty \else
+ \begingroup
+ \@@hldestoff
+ \expandafter\writeitemxref\expandafter{\@lioptarg}%
+ \endgroup
+ \fi
+ \ifnum\itemnumber=1 \else \interitemskip \fi
+ \begingroup
+ \ifx\@lioptarg\empty \else
+ \toks@ = \expandafter{\@lioptarg}%
+ \let\li@nohldest@marker\marker
+ \edef\marker{\noexpand\hldest@impl{li}{\the\toks@}\noexpand\li@nohldest@marker}%
+ \fi
+ \printitem
+ \endgroup
+ \advance\itemnumber by 1
+ \advance\itemletter by 1
+ \advance\itemromannumeral by 1
+ \ignorespaces
+}%
+\def\writeitemxref#1{\definexref{#1}\marker{item}}%
+\def\printitem{%
+ \par
+ \nobreak
+ \vskip-\parskip
+ \noindent
+ \printmarker\marker
+}%
+\def\printmarker#1{\llap{\marker \enspace}}%
+\def\endlist{\belowlistskip}%
+\newcount\numberedlistdepth
+\newcount\itemnumber
+\newcount\itemletter
+\newcount\itemromannumeral
+\def\numberedmarker{%
+ \ifcase\numberedlistdepth
+ (impossible)%
+ \or \printitemnumber
+ \or \printitemletter
+ \or \printitemromannumeral
+ \else *%
+ \fi
+}%
+\def\printitemnumber{\number\itemnumber}%
+\def\printitemletter{\char\the\itemletter}%
+\def\printitemromannumeral{\romannumeral\itemromannumeral}%
+\def\numberedprintmarker#1{\llap{#1) \listmarkerspace}}%
+\def\numberedlist{\environment{@numbered-list}%
+ \advance\numberedlistdepth by 1
+ \itemletter = `a
+ \itemromannumeral = 1
+ \beginlist
+ \let\marker = \numberedmarker
+ \let\printmarker = \numberedprintmarker
+}%
+\def\endnumberedlist{%
+ \par
+ \endenvironment{@numbered-list}%
+ \endlist
+}%
+\let\orderedlist = \numberedlist
+\let\endorderedlist = \endnumberedlist
+\newcount\unorderedlistdepth
+\def\unorderedmarker{%
+ \ifcase\unorderedlistdepth
+ (impossible)%
+ \or \blackbox
+ \or ---%
+ \else *%
+ \fi
+}%
+\def\unorderedprintmarker#1{\llap{#1\listmarkerspace}}%
+\def\unorderedlist{\environment{@unordered-list}%
+ \advance\unorderedlistdepth by 1
+ \beginlist
+ \let\marker = \unorderedmarker
+ \let\printmarker = \unorderedprintmarker
+}%
+\def\endunorderedlist{%
+ \par
+ \endenvironment{@unordered-list}%
+ \endlist
+}%
+\def\listing#1{%
+ \par \begingroup
+ \@setuplisting
+ \setuplistinghook
+ \input #1
+ \endgroup
+}%
+\let\setuplistinghook = \relax
+\def\linenumberedlisting{%
+ \ifx\lineno\undefined \innernewcount\lineno \fi
+ \lineno = 0
+ \everypar = {\advance\lineno by 1 \printlistinglineno}%
+}%
+\def\printlistinglineno{\llap{[\the\lineno]\quad}}%
+\def\nolastlinelisting{\aftergroup\@removeboxes}%
+\def\@removeboxes{%
+ \setbox0 = \lastbox
+ \ifvoid0
+ \ignorespaces % Ignore spaces after the \obeywhitespace's group.
+ \else
+ \expandafter\@removeboxes
+ \fi
+}%
+{%
+ \makeactive\^^L
+ \let^^L = \relax
+ \gdef\@setuplisting{%
+ \uncatcodespecials
+ \obeywhitespace
+ \makeactive\`
+ \makeactive\^^I
+ \makeactive\^^L
+ \def^^L{\vfill\break}%
+ \parskip = 0pt
+ \listingfont
+ }%
+}%
+\def\listingfont{\tt}%
+{%
+ \makeactive\`
+ \gdef`{\relax\lq}% Defeat ligatures.
+}%
+{%
+ \makeactive\^^I
+ \gdef^^I{\hskip8\fontdimen2\font \relax}%
+}%
+\def\verbatimescapechar#1{%
+ \gdef\@makeverbatimescapechar{%
+ \@makeverbatimdoubleescape #1%
+ \catcode`#1 = 0
+ }%
+}%
+\def\@makeverbatimdoubleescape#1{%
+ \catcode`#1 = \other
+ \begingroup
+ \lccode`\* = `#1%
+ \lowercase{\endgroup \ece\def*{*}}%
+}%
+\verbatimescapechar\| % initially escapechar is |
+\def\verbatim{\begingroup
+ \uncatcodespecials
+ \makeactive\` % make space character a single space, not stretchable
+ \@makeverbatimescapechar
+ \tt\obeywhitespace}
+\let\endverbatim = \endgroup
+\def\definecontentsfile#1{%
+ \ece\innernewwrite{#1file}%
+ \ece\innernewif{if@#1fileopened}%
+ \ece\let{#1filebasename} = \jobname
+ \ece\def{open#1file}{\opencontentsfile{#1}}%
+ \ece\def{write#1entry}{\writecontentsentry{#1}}%
+ \ece\def{writenumbered#1entry}{\writenumberedcontentsentry{#1}}%
+ \ece\def{writenumbered#1line}{\writenumberedcontentsline{#1}}%
+ \ece\innernewif{ifrewrite#1file} \csname rewrite#1filetrue\endcsname
+ \ece\def{read#1file}{\readcontentsfile{#1}}%
+}%
+\definecontentsfile{toc}%
+\def\opencontentsfile#1{%
+ \csname if@#1fileopened\endcsname \else
+ \ece{\immediate\openout}{#1file} = \csname #1filebasename\endcsname.#1
+ \ece\global{@#1fileopenedtrue}%
+ \fi
+}%
+\def\writecontentsentry#1#2#3{\writenumberedcontentsentry{#1}{#2}{#3}{}}%
+\def\writenumberedcontentsentry#1#2#3#4{%
+ \csname ifrewrite#1file\endcsname
+ \writenumberedcontents@cmdname{#1}{#2}%
+ \def\temp{#3}% the text
+ \toks2 = \expandafter{#4}%
+ \edef\cs{\the\toks2}%
+ \edef\@wr{%
+ \write\csname #1file\endcsname{%
+ \the\toks0 % the \toc...entry control sequence
+ {\sanitize\temp}% the text
+ \ifx\empty\cs\else {\sanitize\cs}\fi % a secondary number, or nothing
+ {\noexpand\folio}% the page number
+ }%
+ }%
+ \@wr
+ \fi
+ \ignorespaces
+}%
+\def\writenumberedcontentsline#1#2#3#4{%
+ \csname ifrewrite#1file\endcsname
+ \writenumberedcontents@cmdname{#1}{#2}%
+ \def\temp{#4}% the text
+ \toks2 = \expandafter{#3}%
+ \edef\cs{\the\toks2}%
+ \edef\@wr{%
+ \write\csname #1file\endcsname{%
+ \the\toks0 % the \toc...entry control sequence
+ \ifx\empty\cs\else {\sanitize\cs}\fi % a secondary number, or nothing
+ {\sanitize\temp}% the text
+ {\noexpand\folio}% the page number
+ }%
+ }%
+ \@wr
+ \fi
+ \ignorespaces
+}%
+\def\writenumberedcontents@cmdname#1#2{%
+ \csname open#1file\endcsname
+ \edef\temp{#2}% Expand PART fully and see if this produced an integer.
+ \expandafter\if\expandafter\isinteger\expandafter{\temp}%
+ \toks0 = {\expandafter\noexpand \csname #1entry\endcsname}%
+ \edef\temp{\the\toks0{\temp}}%
+ \toks0 = \expandafter{\temp}%
+ \else
+ \toks0 = {\expandafter\noexpand \csname #1#2entry\endcsname}%
+ \fi
+}%
+\def\readcontentsfile#1{%
+ \edef\temp{%
+ \noexpand\testfileexistence[\csname #1filebasename\endcsname]{#1}%
+ }\temp
+ \if@fileexists
+ \input \csname #1filebasename\endcsname.#1\relax
+ \fi
+}%
+\def\tocchapterentry#1#2{\line{\bf #1 \dotfill\ #2}}%
+\def\tocsectionentry#1#2{\line{\quad\sl #1 \dotfill\ \rm #2}}%
+\def\tocsubsectionentry#1#2{\line{\qquad\rm #1 \dotfill\ #2}}%
+\def\tocentry#1#2#3{\line{\rm\hskip#1em #2 \dotfill\ #3}}%
+\let\ifxrefwarning = \iftrue
+\def\xrefwarningtrue{\@citewarningtrue \let\ifxrefwarning = \iftrue}%
+\def\xrefwarningfalse{\@citewarningfalse \let\ifxrefwarning = \iffalse}%
+\begingroup
+ \catcode`\_ = 8
+ \gdef\xrlabel#1{#1_x}%
+\endgroup
+\def\xrdef#1{%
+ \begingroup
+ \hldest@impl{xrdef}{#1}%
+ \begingroup
+ \@@hldestoff
+ \definexref{#1}{\noexpand\folio}{page}%
+ \endgroup
+ \endgroup
+ \ignorespaces
+}%
+\def\definexref#1#2#3{%
+ \hldest@impl{definexref}{#1}%
+ \edef\temp{#1}%
+ \readauxfile
+ \edef\@wr{\noexpand\writeaux{\string\@definelabel{\temp}{#2}{#3}}}%
+ \@wr
+ \ignorespaces
+}%
+\def\@definelabel#1{% #2 and #3 will be read later.
+ \begingroup % Will be ended in \@definelabel@nocheck.
+ \expandafter\ifx\csname\xrlabel{#1}\endcsname \relax
+ \expandafter\@definelabel@nocheck
+ \else
+ \expandafter\@definelabel@warn
+ \fi
+ {#1}%
+}%
+\def\@definelabel@nocheck#1#2#3{%
+ \expandafter\gdef\csname\xrlabel{#1}\endcsname{#2}%
+ \setpropertyglobal{\xrlabel{#1}}{class}{#3}%
+ \endgroup % From \@definelabel.
+}%
+\def\@definelabel@warn#1#2#3{%
+ \message{^^J\linenumber Label `#1' multiply defined,
+ value `#2' of class `#3' overwriting value
+ `\csname\xrlabel{#1}\endcsname' of class
+ `\getproperty{\xrlabel{#1}}{class}'.}%
+ \@definelabel@nocheck{#1}{#2}{#3}%
+}%
+\def\reftie{\penalty\@M \ }% Do not rely on `~' being defined as a tie.
+\let\refspace\
+\def\xrefn{\@getoptionalarg\@finxrefn}%
+\def\@finxrefn#1{%
+ \hlstart@impl{ref}{#1}%
+ \ifx\@optionalarg\empty \else
+ \let\@xrefnoptarg\@optionalarg
+ \readauxfile
+ {\@@hloff\@xrefnoptarg}\reftie
+ \fi
+ \plain@xrefn{#1}%
+ \hlend@impl{ref}%
+}%
+\def\plain@xrefn#1{%
+ \readauxfile
+ \expandafter \ifx\csname\xrlabel{#1}\endcsname\relax
+ \if@citewarning
+ \message{\linenumber Undefined label `#1'.}%
+ \fi
+ \expandafter\def\csname\xrlabel{#1}\endcsname{%
+ `{\tt
+ \escapechar = -1
+ \expandafter\string\csname#1\endcsname
+ }'%
+ }%
+ \fi
+ \csname\xrlabel{#1}\endcsname % Always produce something.
+}%
+\let\refn = \xrefn
+\def\xrefpageword{p.\thinspace}%
+\def\xref{\@getoptionalarg\@finxref}%
+\def\@finxref#1{%
+ \hlstart@impl{xref}{#1}%
+ \ifx\@optionalarg\empty \else
+ {\@@hloff\@optionalarg}\refspace
+ \fi
+ \xrefpageword\plain@xrefn{#1}%
+ \hlend@impl{xref}%
+}%
+\def\@maybewarnref{%
+ \ifundefined{amsppt.sty}%
+ \else
+ \message{Warning: amsppt.sty and Eplain both define \string\ref. See
+ the Eplain manual.}%
+ \let\amsref = \ref
+ \fi
+ \let\ref = \eplainref
+ \ref
+}
+\let\ref = \@maybewarnref
+\def\eplainref{\@getoptionalarg\@fineplainref}%
+\def\@fineplainref{\@generalref{1}{}}%
+\def\refs{\let\@optionalarg\empty \@generalref{0}s}%
+\def\@generalref#1#2#3{%
+ \let\@generalrefoptarg\@optionalarg
+ \readauxfile
+ \ifcase#1 \else \hlstart@impl{ref}{#3}\fi
+ \edef\@generalref@class{\getproperty{\xrlabel{#3}}{class}}%
+ \expandafter\ifx\csname \@generalref@class word\endcsname\relax
+ \ifx\@generalrefoptarg\empty \else {\@@hloff\@generalrefoptarg\reftie}\fi
+ \else
+ \begingroup
+ \@@hloff
+ \ifx\@generalrefoptarg\empty \else \@generalrefoptarg \refspace \fi
+ \csname \@generalref@class word\endcsname
+ #2\reftie
+ \endgroup
+ \fi
+ \ifcase#1 \hlstart@impl{ref}{#3}\fi
+ \plain@xrefn{#3}%
+ \hlend@impl{ref}%
+}%
+\newcount\eqnumber
+\newcount\subeqnumber
+\def\eqdefn{\@getoptionalarg\@fineqdefn}%
+\def\@fineqdefn#1{%
+ \ifx\@optionalarg\empty
+ \global\advance\eqnumber by 1
+ \def\temp{\eqconstruct{\number\eqnumber}}%
+ \else
+ \def\temp{\@optionalarg}%
+ \fi
+ \global\subeqnumber = 0
+ \gdef\@currenteqlabel{#1}%
+ \toks0 = \expandafter{\@currenteqlabel}%
+ \begingroup
+ \def\eqrefn{\noexpand\plain@xrefn}%
+ \def\xrefn{\noexpand\plain@xrefn}%
+ \edef\temp{\noexpand\@eqdefn{\the\toks0}{\temp}}%
+ \temp
+ \endgroup
+}%
+\def\eqsubdefn#1{%
+ \global\advance\subeqnumber by 1
+ \toks0 = {#1}%
+ \toks2 = \expandafter{\@currenteqlabel}%
+ \begingroup
+ \def\eqrefn{\noexpand\plain@xrefn}%
+ \def\xrefn{\noexpand\plain@xrefn}%
+ \def\eqsubreftext{\noexpand\eqsubreftext}%
+ \edef\temp{%
+ \noexpand\@eqdefn
+ {\the\toks0}%
+ {\eqsubreftext{\eqrefn{\the\toks2}}{\the\subeqnumber}}%
+ }%
+ \temp
+ \endgroup
+}%
+\newcount\phantomeqnumber
+\def\phantomeqlabel{PHEQ\the\phantomeqnumber}%
+\def\@eqdefn#1#2{%
+ \ifempty{#1}%
+ \global\advance\phantomeqnumber by 1
+ \edef\hl@eqlabel{\phantomeqlabel}%
+ \readauxfile
+ \else
+ \def\hl@eqlabel{#1}%
+ {\@@hldestoff \definexref{#1}{#2}{eq}}%
+ \fi
+ \hldest@impl{eq}{\hl@eqlabel}%
+ \begingroup % \@definelabel@nocheck will end this group.
+ \@definelabel@nocheck{#1}{#2}{eq}%
+}%
+\def\eqdef{\@getoptionalarg\@fineqdef}%
+\def\@fineqdef{%
+ \toks0 = \expandafter{\@optionalarg}%
+ \edef\temp{\noexpand\@eqdef{\noexpand\eqdefn[\the\toks0]}}%
+ \temp
+}%
+\def\eqsubdef{\@eqdef\eqsubdefn}%
+\def\@eqdef#1#2{%
+ \@maybedisableeqno
+ \eqnum #1{#2}% Define the label and hyperlink destination.
+ \let\@optionalarg\empty % \@fineqref will examine \@optionalarg.
+ {\@@hloff\@fineqref{#2}}% Print the text without a hyperlink.
+ \@mayberestoreeqno
+ \ignorespaces
+}%
+\let\@mayberestoreeqno = \relax
+\def\@maybedisableeqno{%
+ \ifinner
+ \global\let\eqno = \relax
+ \global\let\leqno = \relax
+ \global\let\@mayberestoreeqno = \@restoreeqno
+ \fi
+}%
+\let\@primitiveeqno = \eqno
+\let\@primitiveleqno = \leqno
+\def\@restoreeqno{%
+ \global\let\eqno = \@primitiveeqno
+ \global\let\leqno = \@primitiveleqno
+ \global\let\@mayberestoreeqno = \empty
+}%
+\def\righteqnumbers{%
+ \def\eqnum{\eqno}%
+ \def\eqalignnum{\eqalignno}%
+}%
+\def\lefteqnumbers{%
+ \def\eqnum{\leqno}%
+ \def\eqalignnum{\leqalignno}%
+}%
+\righteqnumbers
+\def\eqrefn{\@getoptionalarg\@fineqrefn}%
+\def\@fineqrefn#1{%
+ \eqref@start{#1}%
+ \plain@xrefn{#1}%
+ \hlend@impl{eq}%
+}%
+\def\eqref{\@getoptionalarg\@fineqref}%
+\def\@fineqref#1{%
+ \eqref@start{#1}%
+ \eqprint{\plain@xrefn{#1}}%
+ \hlend@impl{eq}%
+}%
+\def\eqref@start#1{%
+ \let\@eqrefoptarg\@optionalarg
+ \ifempty{#1}%
+ \hlstart@impl{eq}{\phantomeqlabel}%
+ \else
+ \hlstart@impl{eq}{#1}%
+ \fi
+ \ifx\@eqrefoptarg\empty \else
+ {\@@hloff\@eqrefoptarg\reftie}%
+ \fi
+}%
+\let\eqconstruct = \identity
+\def\eqprint#1{(#1)}%
+\def\eqsubreftext#1#2{#1.#2}%
+\let\extraidxcmdsuffixes = \empty
+\def\defineindex#1{%
+ \def\@idxprefix{#1}%
+ \expandafter\innernewif\csname if\@idxprefix dx\endcsname
+ \csname \@idxprefix dxtrue\endcsname
+ \for\@idxcmd:=,marked,submarked,name%
+ \extraidxcmdsuffixes\do
+ {%
+ \@defineindexcmd\@idxcmd
+ }%
+ \ece\innernewwrite{@#1indexfile}%
+ \ece\innernewif{if@#1indexfileopened}%
+}%
+\newif\ifsilentindexentry
+\def\@defineindexcmd#1{%
+ \@defineoneindexcmd{s}{#1}\silentindexentrytrue
+ \@defineoneindexcmd{}{#1}\silentindexentryfalse
+}%
+\def\@defineoneindexcmd#1#2#3{%
+ \toks@ = {#3}%
+ \edef\temp{%
+ \def
+ \expandonce\csname#1\@idxprefix dx#2\endcsname % e.g., \idx or \sidxname.
+ {\def\noexpand\@idxprefix{\@idxprefix}% define \@idxprefix
+ \expandonce\csname @@#1idx#2\endcsname
+ }%
+ \def
+ \expandonce\csname @@#1idx#2\endcsname{% e.g., \@@idx
+ \the\toks@
+ \noexpand\@idxgetrange\expandonce\csname @#1idx#2\endcsname
+ }%
+ }%
+ \temp
+}%
+\let\indexfilebasename = \jobname
+\def\@idxwrite#1#2{%
+ \csname if\@idxprefix dx\endcsname
+ \@openidxfile
+ \def\temp{#1}%
+ \edef\@wr{%
+ \expandafter\write\csname @\@idxprefix indexfile\endcsname{%
+ \string\indexentry
+ {\sanitize\temp}%
+ {\noexpand#2}%
+ }%
+ }%
+ \@wr
+ \else
+ \write-1{}%
+ \fi
+ \ifindexproofing
+ \def\temp{#1}%
+ \edef\temp{%
+ \insert\@indexproof{\noexpand\indexproofterm{\sanitize\temp}}%
+ }%
+ \temp
+ \ifhmode\allowhyphens\fi
+ \fi
+ \hookrun{afterindexterm}%
+ \ifsilentindexentry \expandafter\ignorespaces\fi
+}%
+\def\@openidxfile{%
+ \csname if@\@idxprefix indexfileopened\endcsname \else
+ \expandafter\immediate\openout\csname @\@idxprefix indexfile\endcsname =
+ \indexfilebasename.\@idxprefix dx
+ \expandafter\global\csname @\@idxprefix indexfileopenedtrue\endcsname
+ \fi
+}%
+\newif\ifindexproofing
+\newinsert\@indexproof
+\dimen\@indexproof = \maxdimen % No limit on number of terms.
+\count\@indexproof = 0 \skip\@indexproof = 0pt % They take up no space.
+\font\indexprooffont = cmtt8
+\def\indexproofterm#1{\hbox{\strut \indexprooffont #1}}%
+\let\@plainmakeheadline = \makeheadline
+\def\makeheadline{%
+ \expandafter\ifx\csname\idxpageanchor{\folio}\endcsname\relax \else
+ {\@@hldeston \hldest@impl{idx}{\hlidxpagelabel{\folio}}}%
+ \fi
+ \indexproofunbox
+ \@plainmakeheadline
+}%
+\def\indexsetmargins{%
+ \ifx\undefined\outsidemargin
+ \dimen@ = 1truein
+ \advance\dimen@ by \hoffset
+ \edef\outsidemargin{\the\dimen@}%
+ \let\insidemargin = \outsidemargin
+ \fi
+}%
+\def\indexproofunbox{%
+ \ifvoid\@indexproof\else
+ \indexsetmargins
+ \rlap{%
+ \kern\hsize
+ \ifodd\pageno \kern\outsidemargin \else \kern\insidemargin \fi
+ \vbox to 0pt{\unvbox\@indexproof\vss}%
+ }\nointerlineskip
+ \fi
+}%
+\def\idxrangebeginword{begin}%
+\def\idxbeginrangemark{(}% the corresponding magic char to go in the idx file
+\def\idxrangeendword{end}%
+\def\idxendrangemark{)}%
+\def\idxseecmdword{see}%
+\def\idxseealsocmdword{seealso}%
+\newif\if@idxsee
+\newif\if@hlidxencap
+\let\@idxseenterm = \relax
+\def\idxpagemarkupcmdword{pagemarkup}%
+\let\@idxpagemarkup = \relax
+\def\@idxgetrange#1{%
+ \let\@idxrangestr = \empty
+ \let\@afteridxgetrange = #1%
+ \begingroup
+ \catcode\idxargopen=1
+ \@getoptionalarg\@finidxgetopt
+}%
+\def\@finidxgetopt{%
+ \global\let\@idxgetrange@arg\@optionalarg
+ \endgroup
+ \@hlidxencaptrue
+ \for\@idxarg:=\@idxgetrange@arg\do{%
+ \expandafter\@idxcheckpagemarkup\@idxarg=,%
+ \ifx\@idxarg\idxrangebeginword
+ \def\@idxrangestr{\idxencapoperator\idxbeginrangemark}%
+ \else
+ \ifx\@idxarg\idxrangeendword
+ \def\@idxrangestr{\idxencapoperator\idxendrangemark}%
+ \@hlidxencapfalse
+ \else
+ \ifx\@idxarg\idxseecmdword
+ \def\@idxpagemarkup{indexsee}%
+ \@idxseetrue
+ \@hlidxencapfalse
+ \else
+ \ifx\@idxarg\idxseealsocmdword
+ \def\@idxpagemarkup{indexseealso}%
+ \@idxseetrue
+ \@hlidxencapfalse
+ \else
+ \ifx\@idxpagemarkup\relax
+ \errmessage{Unrecognized index option `\@idxarg'}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ }%
+ \ifnum\hldest@place@idx < 0 \else
+ \if@hlidxencap
+ \ifx\@idxpagemarkup\relax
+ \let\@idxpagemarkup\empty
+ \fi
+ \ifcase\hldest@place@idx \relax
+ \edef\@idxpagemarkup{hlidxpage{\@idxpagemarkup}}%
+ \definepageanchor{\noexpand\folio}%
+ \else
+ \global\advance\hlidxlabelnumber by 1
+ \edef\@idxpagemarkup{hlidx{\hlidxlabel}{\@idxpagemarkup}}%
+ \hldest@impl{idx}{\hlidxlabel}%
+ \fi
+ \fi
+ \fi
+ \@afteridxgetrange
+}%
+\def\@idxcheckpagemarkup#1=#2,{%
+ \def\temp{#1}%
+ \ifx\temp\idxpagemarkupcmdword
+ \if ,#2, % If #2 is empty, complain.
+ \errmessage{Missing markup command to `pagemarkup'}%
+ \else
+ \def\temp##1={##1}%
+ \edef\@idxpagemarkup{\temp\string#2}%
+ \fi
+ \fi
+}%
+\def\hldest@place@idx{-1}%
+\begingroup
+ \catcode`\_ = 8
+ \gdef\idxpageanchor#1{#1_p}%
+\endgroup
+\def\definepageanchor#1{%
+ \readauxfile
+ \edef\@wr{\noexpand\writeaux{\string\@definepageanchor{#1}}}%
+ \@wr
+ \ignorespaces
+}%
+\def\@definepageanchor#1{%
+ \expandafter\gdef\csname\idxpageanchor{#1}\endcsname{}%
+}%
+\newcount\hlidxlabelnumber
+\def\hlidxlabel{IDX\the\hlidxlabelnumber}%
+\def\hlidxpagelabel#1{IDXPG#1}%
+\def\hlidx#1#2#3{%
+ \ifempty{#2}%
+ \let\@idxpageencap\relax
+ \else
+ \expandafter\let\expandafter\@idxpageencap\csname #2\endcsname
+ \fi
+ \hlstart@impl{idx}{#1}%
+ \@idxpageencap{#3}%
+ \hlend@impl{idx}%
+}%
+\def\hlidxpage#1#2{%
+ \@hlidxgetpages{#2}%
+ \ifempty{#1}%
+ \let\@idxpageencap\relax
+ \else
+ \expandafter\let\expandafter\@idxpageencap\csname #1\endcsname
+ \fi
+ \hlstart@impl{idx}{\hlidxpagelabel{\@idxpageiref}}%
+ \expandafter\@idxpageencap\expandafter{\@idxpagei}%
+ \hlend@impl{idx}%
+ \ifx\@idxpageii\empty \else
+ \@idxpagesep
+ \hlstart@impl{idx}{\hlidxpagelabel{\@idxpageiiref}}%
+ \expandafter\@idxpageencap\expandafter{\@idxpageii}%
+ \hlend@impl{idx}%
+ \fi
+}%
+\def\@hlidxgetpages#1{%
+ \idxparselist{#1}%
+ \ifx\idxpagei\empty
+ \idxparserange{#1}%
+ \ifx\idxpagei\empty
+ \def\@idxpageiref{#1}% Label for \hlstart.
+ \else
+ \let\@idxpageiref\idxpagei % Label for \hlstart.
+ \fi
+ \def\@idxpagei{#1}%
+ \let\@idxpageii\empty
+ \else
+ \let\@idxpagei\idxpagei
+ \let\@idxpageii\idxpageii
+ \let\@idxpageiref\idxpagei % Label for \hlstart.
+ \let\@idxpageiiref\idxpageii % Label for \hlstart.
+ \let\@idxpagesep\idxpagelistdelimiter
+ \fi
+}%
+\def\setidxpagelistdelimiter#1{%
+ \gdef\idxpagelistdelimiter{#1}%
+ \gdef\@removepagelistdelimiter##1#1{##1}%
+ \gdef\@idxparselist##1#1##2\@@{%
+ \ifempty{##2}%
+ \let\idxpagei\empty
+ \else
+ \def\idxpagei{##1}%
+ \edef\idxpageii{\@removepagelistdelimiter##2}%
+ \fi
+ }%
+ \gdef\idxparselist##1{\@idxparselist##1#1\@@}%
+}%
+\def\setidxpagerangedelimiter#1{%
+ \gdef\idxpagerangedelimiter{#1}%
+ \gdef\@removepagerangedelimiter##1#1{##1}%
+ \gdef\@idxparserange##1#1##2\@@{%
+ \ifempty{##2}%
+ \let\idxpagei\empty
+ \else
+ \def\idxpagei{##1}%
+ \edef\idxpageii{\@removepagerangedelimiter##2}%
+ \fi
+ }%
+ \gdef\idxparserange##1{\@idxparserange##1#1\@@}%
+}%
+\setidxpagelistdelimiter{, }%
+\setidxpagerangedelimiter{--}%
+\def\idxsubentryseparator{!}%
+\def\idxencapoperator{|}%
+\def\idxmaxpagenum{99999}%
+\newtoks\@idxmaintoks
+\newtoks\@idxsubtoks
+\def\@idxtokscollect{%
+ \edef\temp{\the\@idxsubtoks}%
+ \edef\@indexentry{%
+ \the\@idxmaintoks
+ \ifx\temp\empty\else \idxsubentryseparator\the\@idxsubtoks \fi
+ \@idxrangestr
+ }%
+ \if@idxsee
+ \@idxseefalse % Reset so the next term won't be a `see'.
+ \edef\temp{\noexpand\idx@getverbatimarg
+ {\noexpand\@finidxtokscollect{\idxmaxpagenum}}}%
+ \else
+ \def\temp{\@finfinidxtokscollect\folio}%
+ \fi
+ \temp
+}%
+\def\@finidxtokscollect#1#2{%
+ \def\@idxseenterm{#2}%
+ \@finfinidxtokscollect{#1}%
+}%
+\def\@finfinidxtokscollect#1{%
+ \ifx\@idxpagemarkup\relax \else
+ \toks@ = \expandafter{\@indexentry}%
+ \edef\@indexentry{%
+ \the\toks@
+ \ifx\@idxrangestr\empty \idxencapoperator \fi
+ \@idxpagemarkup
+ }%
+ \let\@idxpagemarkup = \relax
+ \fi
+ \ifx\@idxseenterm\relax \else
+ \toks@ = \expandafter{\@indexentry}%
+ \edef\@indexentry{\the\toks@{\sanitize\@idxseenterm}}%
+ \let\@idxseenterm = \relax
+ \fi
+ \expandafter\@idxwrite\expandafter{\@indexentry}{#1}%
+}%
+\def\@idxcollect#1#2{%
+ \@idxmaintoks = {#1}%
+ \@idxsubtoks = {#2}%
+ \@idxtokscollect
+}%
+\def\idxargopen{`\{}%
+\def\idxargclose{`\}}%
+\def\idx@getverbatimarg#1{%
+ \def\idx@getverbatimarg@cmd{#1}% Save the command, allowing it to be
+ \begingroup
+ \uncatcodespecials
+ \catcode\idxargopen=1
+ \catcode\idxargclose=2
+ \catcode`\ =10 % Swallow multiple consequent spaces.
+ \catcode`\^^I=10 % Just in case, to avoid dependence on
+ \catcode`\^^M=5 % current meanings of tabs and newlines.
+ \idx@fingetverbatimarg
+}%
+\def\idx@fingetverbatimarg#1{\endgroup\idx@getverbatimarg@cmd{#1}}%
+\def\idx@getverboptarg#1{%
+ \def\idx@optionaltemp{#1}% Save the command, allowing it to be more
+ \let\idx@optionalnext = \relax
+ \begingroup
+ \if@idxsee \catcode\idxargopen=1 \fi
+ \@futurenonspacelet\idx@optionalnext\idx@bracketcheck
+}%
+\def\idx@bracketcheck{%
+ \ifx [\idx@optionalnext
+ \endgroup % Cancel \catcode\idxargopen=1.
+ \expandafter\idx@finbracketcheck
+ \else
+ \endgroup % Cancel \catcode\idxargopen=1.
+ \let\@optionalarg = \empty
+ \expandafter\idx@optionaltemp
+ \fi
+}%
+\def\idx@finbracketcheck{%
+ \begingroup
+ \uncatcodespecials
+ \catcode`\ =10 % Swallow multiple consequent spaces.
+ \catcode`\^^I=10 % Just in case, to avoid dependence on
+ \catcode`\^^M=5 % current meanings of tabs and newlines.
+ \idx@@getoptionalarg
+}%
+\def\idx@@getoptionalarg[#1]{%
+ \endgroup
+ \def\@optionalarg{#1}%
+ \idx@optionaltemp
+}%
+{\catcode`\&=0
+\gdef\idx@scanterm#1{%
+ \edef\idx@scanterm@nl@catcode{\the\catcode`\^^M\relax}%
+ \catcode`\^^M=5
+ \scantokens{#1&endinput}%
+ \catcode`\^^M=\idx@scanterm@nl@catcode
+}}%
+\def\@idx{\idx@getverbatimarg\@finidx}%
+\def\@finidx#1{%
+ \idx@scanterm{#1}% Produce TERM as output.
+ \@idxcollect{#1}{}%
+}%
+\def\@sidx{\idx@getverbatimarg\@finsidx}%
+\def\@finsidx#1{\@idxmaintoks = {#1}\idx@getverboptarg\@finfinsidx}%
+\def\@finfinsidx{%
+ \@idxsubtoks = \expandafter{\@optionalarg}%
+ \@idxtokscollect
+}%
+\def\idxsortkeysep{@}% This `@' is catcode 11, but it doesn't matter.
+\def\@idxconstructmarked#1#2#3{%
+ \toks@ = {#2}% The control sequence.
+ \toks2 = {#3}% The term.
+ \edef\temp{\the\toks2 \idxsortkeysep \the\toks@{\the\toks2}}%
+ #1 = \expandafter{\temp}%
+}%
+\def\@idxmarked#1{\idx@getverbatimarg{\@finidxmarked{#1}}}%
+\def\@finidxmarked#1#2{%
+ \idx@scanterm{#1{#2}}% Produce \CS{TERM} as output.
+ \@idxconstructmarked\@idxmaintoks{#1}{#2}%
+ \@idxsubtoks = {}%
+ \@idxtokscollect
+}%
+\def\@sidxmarked#1{\idx@getverbatimarg{\@finsidxmarked{#1}}}%
+\def\@finsidxmarked#1#2{%
+ \@idxconstructmarked\toks@{#1}{#2}%
+ \edef\temp{{\the\toks@}}%
+ \expandafter\@finsidx\temp
+}%
+\def\@idxsubmarked{%
+ \let\sidxsubmarked@print\idxsubmarked@print
+ \idx@getverbatimarg\@finsidxsubmarked
+}%
+\def\idxsubmarked@print{\expandafter\idx@scanterm\expandafter}%
+\def\@sidxsubmarked{%
+ \let\sidxsubmarked@print\gobble
+ \idx@getverbatimarg\@finsidxsubmarked
+}%
+\def\@finsidxsubmarked#1{\@idxmaintoks = {#1}\@@finsidxsubmarked}% Reads TERM.
+\def\@@finsidxsubmarked#1{\idx@getverbatimarg{\@@@finsidxsubmarked{#1}}}% Reads \CS.
+\def\@@@finsidxsubmarked#1#2{% Reads {\CS}{SUBTERM}.
+ \sidxsubmarked@print % Prints for \@idxsubmarked, gobbles for \@sidxsubmarked.
+ {\the\@idxmaintoks\space #1{#2}}% Maybe produce `TERM \CS{SUBTERM}' as output.
+ \@idxconstructmarked\@idxsubtoks{#1}{#2}%
+ \@idxtokscollect
+}%
+\def\idxnameseparator{, }% as in `Tachikawa, Elizabeth'
+\def\@idxcollectname#1#2{%
+ \def\temp{#1}%
+ \ifx\temp\empty
+ \toks@ = {}%
+ \else
+ \toks@ = \expandafter{\idxnameseparator #1}%
+ \fi
+ \toks2 = {#2}%
+ \edef\temp{\the\toks2 \the\toks@}%
+}%
+\def\@idxname{\idx@getverbatimarg\@finidxname}%
+\def\@finidxname#1{\idx@getverbatimarg{\@finfinidxname{#1}}}%
+\def\@finfinidxname#1#2{%
+ \idx@scanterm{#1 #2}% Separate the names by a space in the output.
+ \@idxcollectname{#1}{#2}%
+ \expandafter\@idxcollect\expandafter{\temp}{}%
+}%
+\def\@sidxname{\idx@getverbatimarg\@finsidxname}%
+\def\@finsidxname#1{\idx@getverbatimarg{\@finfinsidxname{#1}}}%
+\def\@finfinsidxname#1#2{%
+ \@idxcollectname{#1}{#2}%
+ \expandafter\@finsidx\expandafter{\temp}%
+}%
+\let\indexfonts = \relax
+\def\readindexfile#1{%
+ \edef\@idxprefix{#1}%
+ \testfileexistence[\indexfilebasename]{\@idxprefix nd}%
+ \iffileexists \begingroup
+ \ifx\begin\undefined
+ \def\begin##1{\@beginindex}%
+ \let\end = \@gobble
+ \fi
+ \input \indexfilebasename.\@idxprefix nd
+ \singlecolumn
+ \endgroup
+ \else
+ \message{No index file \indexfilebasename.\@idxprefix nd.}%
+ \fi
+}%
+\def\@beginindex{%
+ \let\item = \@indexitem
+ \let\subitem = \@indexsubitem
+ \let\subsubitem = \@indexsubsubitem
+ \indexfonts
+ \doublecolumns
+ \parindent = 0pt
+ \hookrun{beginindex}%
+}%
+\let\indexspace = \bigbreak
+\let\afterindexterm = \quad
+\newskip\aboveindexitemskipamount \aboveindexitemskipamount = 0pt plus2pt
+\def\aboveindexitemskip{\vskip\aboveindexitemskipamount}%
+\def\@indexitem{\begingroup
+ \@indexitemsetup
+ \leftskip = 0pt
+ \aboveindexitemskip
+ \penalty-100 % Encourage page breaks before items.
+ \def\par{\endgraf\endgroup\nobreak}%
+}%
+\def\@indexsubitem{%
+ \@indexitemsetup
+ \leftskip = 1em
+}%
+\def\@indexsubsubitem{%
+ \@indexitemsetup
+ \leftskip = 2em
+}%
+\def\@indexitemsetup{%
+ \par
+ \hangindent = 1em
+ \raggedright
+ \hyphenpenalty = 10000
+ \hookrun{indexitem}%
+}%
+\def\seevariant{\it}%
+\def\indexseeword{see}%
+\def\indexsee{\idx@getverbatimarg\@finindexsee}%
+\def\@finindexsee#1#2{{\seevariant \indexseeword\/ }\idx@scanterm{#1}}%
+\def\indexseealsowords{see also}%
+\def\indexseealso{\idx@getverbatimarg\@finindexseealso}%
+\def\@finindexseealso#1#2{{\seevariant \indexseealsowords\/ }\idx@scanterm{#1}}%
+\defineindex{i}%
+\begingroup
+ \catcode `\^^M = \active %
+ \gdef\flushleft{%
+ \def\@endjustifycmd{\@endflushleft}%
+ \def\@eoljustifyaction{\null\hfil\break}%
+ \let\@firstlinejustifyaction = \relax
+ \@startjustify %
+ }%
+ \gdef\flushright{%
+ \def\@endjustifycmd{\@endflushright}%
+ \def\@eoljustifyaction{\break\null\hfil}%
+ \def\@firstlinejustifyaction{\hfil\null}%
+ \@startjustify %
+ }%
+ \gdef\center{%
+ \def\@endjustifycmd{\@endcenter}%
+ \def\@eoljustifyaction{\hfil\break\null\hfil}%
+ \def\@firstlinejustifyaction{\hfil\null}%
+ \@startjustify %
+ }%
+ \gdef\@startjustify{%
+ \parskip = 0pt
+ \catcode`\^^M = \active %
+ \def^^M{\futurelet\next\@finjustifyreturn}%
+ \def\@eateol##1^^M{%
+ \def\temp{##1}%
+ \@firstlinejustifyaction %
+ \ifx\temp\empty\else \temp^^M\fi %
+ }%
+ \expandafter\aftergroup\@endjustifycmd %
+ \checkenv \environmenttrue %
+ \par\noindent %
+ \@eateol %
+ }%
+ \gdef\@finjustifyreturn{%
+ \@eoljustifyaction %
+ \ifx\next^^M%
+ \def\par{\endgraf\vskip\blanklineskipamount \global\let\par = \endgraf}%
+ \@endjustifycmd %
+ \noindent %
+ \@firstlinejustifyaction %
+ \fi %
+ }%
+\endgroup
+\def\@endflushleft{\unpenalty{\parfillskip = 0pt plus1fil\par}\ignorespaces}%
+\def\@endflushright{% Remove the \hfil\null\break we just put on.
+ \unskip \setbox0=\lastbox \unpenalty
+ {\parfillskip = 0pt \par}\ignorespaces
+}%
+\def\@endcenter{% Remove the \hfil\null\break we just put on.
+ \unskip \setbox0=\lastbox \unpenalty
+ {\parfillskip = 0pt plus1fil \par}\ignorespaces
+}%
+\ifx\@undefined\raggedleft
+\innernewskip\raggedleftskip \raggedleftskip=0pt plus2em
+\def\raggedleft{\leftskip\raggedleftskip \parindent=0pt
+ \spaceskip.3333em \xspaceskip.5em \parfillskip0pt \relax}
+\fi % \raggedleft undefined
+\newcount\abovecolumnspenalty \abovecolumnspenalty = 10000
+\newcount\@linestogo % Lines remaining to process.
+\newcount\@linestogoincolumn % Lines remaining in column.
+\newcount\@columndepth % Number of lines in a column.
+\newdimen\@columnwidth % Width of each column.
+\newtoks\crtok \crtok = {\cr}%
+\newcount\currentcolumn
+\def\makecolumns#1/#2: {\par \begingroup
+ \@columndepth = #1
+ \advance\@columndepth by -1
+ \divide \@columndepth by #2
+ \advance\@columndepth by 1
+ \@linestogoincolumn = \@columndepth
+ \@linestogo = #1
+ \currentcolumn = 1
+ \def\@endcolumnactions{%
+ \ifnum \@linestogo<2
+ \the\crtok \egroup \endgroup \par % End \valign and \makecolumns.
+ \else
+ \global\advance\@linestogo by -1
+ \ifnum\@linestogoincolumn<2
+ \global\advance\currentcolumn by 1
+ \global\@linestogoincolumn = \@columndepth
+ \the\crtok
+ \else
+ &\global\advance\@linestogoincolumn by -1
+ \fi
+ \fi
+ }%
+ \makeactive\^^M
+ \letreturn \@endcolumnactions
+ \@columnwidth = \hsize
+ \advance\@columnwidth by -\parindent
+ \divide\@columnwidth by #2
+ \penalty\abovecolumnspenalty
+ \noindent % It's not a paragraph (usually).
+ \valign\bgroup
+ &\hbox to \@columnwidth{\strut \hsize = \@columnwidth ##\hfil}\cr
+}%
+\newcount\footnotenumber
+\newcount\hlfootlabelnumber
+\newdimen\footnotemarkseparation \footnotemarkseparation = .5em
+\newskip\interfootnoteskip \interfootnoteskip = 0pt
+\newtoks\everyfootnote
+\newdimen\footnoterulewidth \footnoterulewidth = 2in
+\newdimen\footnoteruleheight \footnoteruleheight = 0.4pt
+\newdimen\belowfootnoterulespace \belowfootnoterulespace = 2.6pt
+\let\@plainfootnote = \footnote
+\let\@plainvfootnote = \vfootnote
+\def\hlfootlabel{FOOT\the\hlfootlabelnumber}%
+\def\hlfootbacklabel{FOOTB\the\hlfootlabelnumber}%
+\def\@eplainfootnote#1{\let\@sf\empty % parameter #2 (the text) is read later
+ \ifhmode\edef\@sf{\spacefactor\the\spacefactor}\/\fi
+ \global\advance\hlfootlabelnumber by 1
+ \hlstart@impl{foot}{\hlfootlabel}%
+ \hldest@impl{footback}{\hlfootbacklabel}%
+ #1%
+ \hlend@impl{foot}%
+ \@sf\vfootnote{#1}%
+}%
+\let\footnote\@eplainfootnote
+\def\vfootnote#1{\insert\footins\bgroup
+ \interlinepenalty\interfootnotelinepenalty
+ \splittopskip\ht\strutbox % top baseline for broken footnotes
+ \advance\splittopskip by \interfootnoteskip
+ \splitmaxdepth\dp\strutbox
+ \floatingpenalty\@MM
+ \leftskip\z@skip \rightskip\z@skip \spaceskip\z@skip \xspaceskip\z@skip
+ \everypar = {}%
+ \parskip = 0pt % because of the vskip
+ \ifnum\@numcolumns > 1 \hsize = \@normalhsize \fi
+ \the\everyfootnote
+ \vskip\interfootnoteskip
+ \indent\llap{%
+ \hlstart@impl{footback}{\hlfootbacklabel}%
+ \hldest@impl{foot}{\hlfootlabel}%
+ #1%
+ \hlend@impl{footback}%
+ \kern\footnotemarkseparation
+ }%
+ \footstrut\futurelet\next\fo@t
+}%
+\def\footnoterule{\dimen@ = \footnoteruleheight
+ \advance\dimen@ by \belowfootnoterulespace
+ \kern-\dimen@
+ \hrule width\footnoterulewidth height\footnoteruleheight depth0pt
+ \kern\belowfootnoterulespace
+ \vskip-\interfootnoteskip
+}%
+\def\numberedfootnote{%
+ \global\advance\footnotenumber by 1
+ \@eplainfootnote{$^{\number\footnotenumber}$}%
+}%
+\newdimen\paperheight
+\ifnum\mag=1000
+ \paperheight = 11in % No magnification (yet).
+\else
+ \paperheight = 11truein % We already have a magnification.
+\fi
+\def\topmargin{\afterassignment\@finishtopmargin \dimen@}%
+\def\@finishtopmargin{%
+ \dimen2 = \voffset % Remember the old \voffset.
+ \voffset = \dimen@ \advance\voffset by -1truein
+ \advance\dimen2 by -\voffset % Compute the change in \voffset.
+ \advance\vsize by \dimen2 % Change type area accordingly.
+}%
+\def\advancetopmargin{%
+ \dimen@ = 0pt \afterassignment\@finishadvancetopmargin \advance\dimen@
+}%
+\def\@finishadvancetopmargin{%
+ \advance\voffset by \dimen@
+ \advance\vsize by -\dimen@
+}%
+\def\bottommargin{\afterassignment\@finishbottommargin \dimen@}%
+\def\@finishbottommargin{%
+ \@computebottommargin % Result in \dimen2.
+ \advance\dimen2 by -\dimen@ % Compute the change in the bottom margin.
+ \advance\vsize by \dimen2 % Change the type area.
+}%
+\def\advancebottommargin{%
+ \dimen@ = 0pt \afterassignment\@finishadvancebottommargin \advance\dimen@
+}%
+\def\@finishadvancebottommargin{%
+ \advance\vsize by -\dimen@
+}%
+\def\@computebottommargin{%
+ \dimen2 = \paperheight % The total paper size.
+ \advance\dimen2 by -\vsize % Less the text size.
+ \advance\dimen2 by -\voffset % Less the offset at the top.
+ \advance\dimen2 by -1truein % Less the default offset.
+}%
+\newdimen\paperwidth
+\ifnum\mag=1000
+ \paperwidth = 8.5in % No magnification (yet).
+\else
+ \paperwidth = 8.5truein % We already have a magnification.
+\fi
+\def\leftmargin{\afterassignment\@finishleftmargin \dimen@}%
+\def\@finishleftmargin{%
+ \dimen2 = \hoffset % Remember the old \hoffset.
+ \hoffset = \dimen@ \advance\hoffset by -1truein
+ \advance\dimen2 by -\hoffset % Compute the change in \hoffset.
+ \advance\hsize by \dimen2 % Change type area accordingly.
+}%
+\def\advanceleftmargin{%
+ \dimen@ = 0pt \afterassignment\@finishadvanceleftmargin \advance\dimen@
+}%
+\def\@finishadvanceleftmargin{%
+ \advance\hoffset by \dimen@
+ \advance\hsize by -\dimen@
+}%
+\def\rightmargin{\afterassignment\@finishrightmargin \dimen@}%
+\def\@finishrightmargin{%
+ \@computerightmargin % Result in \dimen2.
+ \advance\dimen2 by -\dimen@ % Compute the change in the right margin.
+ \advance\hsize by \dimen2 % Change the type area.
+}%
+\def\advancerightmargin{%
+ \dimen@ = 0pt \afterassignment\@finishadvancerightmargin \advance\dimen@
+}%
+\def\@finishadvancerightmargin{%
+ \advance\hsize by -\dimen@
+}%
+\def\@computerightmargin{%
+ \dimen2 = \paperwidth % The total paper size.
+ \advance\dimen2 by -\hsize % Less the text size.
+ \advance\dimen2 by -\hoffset % Less the offset at the left.
+ \advance\dimen2 by -1truein % Less the default offset.
+}%
+\let\@plainm@g = \m@g
+\def\m@g{\@plainm@g \paperwidth = 8.5 true in \paperheight = 11 true in}%
+\newskip\abovecolumnskip \abovecolumnskip = \bigskipamount
+\newskip\belowcolumnskip \belowcolumnskip = \bigskipamount
+\newdimen\gutter \gutter = 2pc
+\newbox\@partialpage
+\newdimen\@normalhsize
+\newdimen\@normalvsize % The original (before multi-columns) \vsize.
+\newtoks\previousoutput
+\def\quadcolumns{\@columns4}%
+\def\triplecolumns{\@columns3}%
+\def\doublecolumns{\@columns2}%
+\def\begincolumns#1{\ifcase#1\relax \or \singlecolumn \or \@columns2 \or
+ \@columns3 \or \@columns4 \else \relax \fi}%
+\def\endcolumns{\singlecolumn}%
+\let\@ndcolumns = \relax
+\chardef\@numcolumns = 1
+\mathchardef\@ejectpartialpenalty = 10141
+\chardef\@col@minlines = 3
+\chardef\@col@extralines = 3
+\newdimen\@col@extraheight
+\def\@columns#1{%
+ \@ndcolumns
+ \global\let\@ndcolumns = \@endcolumns
+ \global\chardef\@numcolumns = #1
+ \global\previousoutput = \expandafter{\the\output}%
+ \global\output = {%
+ \ifnum\outputpenalty = -\@ejectpartialpenalty
+ \dimen@ = \vsize
+ \advance\dimen@ by \@col@minlines\baselineskip
+ \global\setbox\@partialpage =
+ \vbox \ifdim \pagetotal > \vsize to \dimen@ \fi {%
+ \unvbox255 \unskip
+ }%
+ \else
+ \the\previousoutput
+ \fi
+ }%
+ \vskip \abovecolumnskip
+ \vskip \@col@minlines\baselineskip
+ \penalty -\@ejectpartialpenalty
+ \global\output = {\@columnoutput}%
+ \global\@normalhsize = \hsize
+ \global\@normalvsize = \vsize
+ \count@ = \@numcolumns
+ \advance\count@ by -1
+ \global\advance\hsize by -\count@\gutter
+ \global\divide\hsize by \@numcolumns
+ \advance\vsize by -\ht\@partialpage
+ \advance\vsize by -\ht\footins
+ \ifvoid\footins\else \advance\vsize by -\skip\footins \fi
+ \multiply\count\footins by \@numcolumns
+ \advance\vsize by -\ht\topins
+ \ifvoid\topins\else \advance\vsize by -\skip\topins \fi
+ \multiply\count\topins by \@numcolumns
+ \global\vsize = \@numcolumns\vsize
+ \@col@extraheight=\@col@extralines\baselineskip
+ \multiply\@col@extraheight by \@numcolumns
+ \global\advance\vsize by \@col@extraheight
+}%
+\def\gutterbox{\vbox to \dimen0{\vfil\hbox{\hfil}\vfil}}%
+\def\@columnsplit{%
+ \splittopskip = \topskip
+ \splitmaxdepth = \baselineskip
+ \begingroup
+ \vbadness = 10000
+ \global\setbox1 = \vsplit255 to \dimen@ \global\wd1 = \hsize
+ \global\setbox3 = \vsplit255 to \dimen@ \global\wd3 = \hsize
+ \ifnum\@numcolumns > 2
+ \global\setbox5 = \vsplit255 to \dimen@ \global\wd5 = \hsize
+ \fi
+ \ifnum\@numcolumns > 3
+ \global\setbox7 = \vsplit255 to \dimen@ \global\wd7 = \hsize
+ \fi
+ \endgroup
+ \setbox0 = \box255
+ \global\setbox255 = \vbox{%
+ \unvbox\@partialpage
+ \ifcase\@numcolumns \relax\or\relax
+ \or \hbox to \@normalhsize{\box1\hfil\gutterbox\hfil\box3}%
+ \or \hbox to \@normalhsize{\box1\hfil\gutterbox\hfil\box3%
+ \hfil\gutterbox\hfil\box5}%
+ \or \hbox to \@normalhsize{\box1\hfil\gutterbox\hfil\box3%
+ \hfil\gutterbox\hfil\box5%
+ \hfil\gutterbox\hfil\box7}%
+ \fi
+ }%
+ \setbox\@partialpage = \box0
+}%
+\def\@columnoutput{%
+ \dimen@ = \ht255
+ \advance\dimen@ by -\@col@extraheight
+ \divide\dimen@ by \@numcolumns
+ \@columnsplit
+ \@recoverclubpenalty
+ \hsize = \@normalhsize % Local to \output's group.
+ \vsize = \@normalvsize
+ \the\previousoutput
+ \unvbox\@partialpage
+ \penalty\outputpenalty
+ \global\vsize = \@numcolumns\@normalvsize
+ \global\advance\vsize by \@col@extraheight
+}%
+\def\singlecolumn{%
+ \@ndcolumns
+ \chardef\@numcolumns = 1
+ \vskip\belowcolumnskip
+ \nointerlineskip
+}%
+\newbox\@singlecolumnbox
+\newdimen\column@pagegoal
+\newdimen\column@vsize
+\def\@endcolumns{%
+ \global\let\@ndcolumns = \relax
+ \par % Shouldn't start in horizontal mode.
+ \column@pagegoal = \pagegoal
+ \advance\column@pagegoal by-\@col@extraheight
+ \ifdim \pagetotal > \column@pagegoal
+ \column@vsize = \column@pagegoal
+ \else
+ \column@vsize = \pagetotal
+ \fi
+ \global\output = {\global\setbox1 = \box255}%
+ \pagegoal = \pagetotal
+ \break % Exercise the page builder, i.e., \output.
+ \setbox2 = \box1 % Save material in box2 in case of overflow.
+ \global\output = \expandafter{\the\previousoutput}%
+ \setbox\@singlecolumnbox = \box\@partialpage
+ \@balancecolumns
+}%
+\def\@balancecolumns{%
+ \global\setbox255 = \copy2 % Retrieve what the fake \output set.
+ \dimen@ = \column@vsize
+ \divide\dimen@ by \@numcolumns
+ \@columnsplit
+ \ifvoid\@partialpage
+ \global\vsize = \@normalvsize
+ \global\hsize = \@normalhsize
+ \dump@balanced@columns
+ \let\next\relax
+ \else
+ \advance \column@vsize by \@numcolumns pt
+ \test@spill@columns
+ \ifspill@columns
+ \begingroup
+ \vsize = \@normalvsize
+ \hsize = \@normalhsize
+ \dump@balanced@columns
+ \break
+ \@recoverclubpenalty
+ \endgroup
+ \unvbox\@partialpage
+ \let\next\@endcolumns
+ \else
+ \setbox0=\box\@partialpage % Merely to void \@partialpage.
+ \let\next\@balancecolumns
+ \fi
+ \fi
+ \next
+}%
+\def\dump@balanced@columns{%
+ \ifvoid\topins\else\topinsert\unvbox\topins\endinsert\fi
+ \unvbox\@singlecolumnbox
+ \nointerlineskip
+ \box255
+}%
+\newif\ifspill@columns
+\def\test@spill@columns{%
+ \spill@columnsfalse
+ \ifdim \column@vsize > \column@pagegoal
+ \ifvoid\footins
+ \ifvoid\topins
+ \spill@columnstrue
+ \fi
+ \fi
+ \fi
+}%
+\def\@saveclubpenalty{% save the current value of \clubpenalty
+ \edef\@recoverclubpenalty{%
+ \global\clubpenalty=\the\clubpenalty\relax%
+ \global\let\noexpand\@recoverclubpenalty\relax
+ }% the \noexpand handles infinite self-reference
+}%
+\let\@recoverclubpenalty\relax
+\newdimen\temp@dimen
+\def\columnfill{%
+ \par
+ \dimen@ = \pagetotal % The height of the text so far.
+ \temp@dimen = \vsize % = \@numcolumns * columnheight
+ \advance\temp@dimen by -\@col@extraheight
+ \divide\temp@dimen by \@numcolumns % Compute column height
+ \loop
+ \ifdim \dimen@ > \temp@dimen % more material than a column?
+ \advance \dimen@ by -\temp@dimen
+ \advance \dimen@ by \topskip % fudge factor
+ \repeat
+ \advance \temp@dimen by -\dimen@
+ \advance \temp@dimen by -\prevdepth
+ \@saveclubpenalty
+ \clubpenalty=10000\relax
+ \hrule height\temp@dimen width0pt depth0pt\relax % fill space with rule
+ \nointerlineskip
+ \par
+ \nointerlineskip
+ \allowbreak \vfil % To allow a page break here.
+ \relax
+}%
+\def\@hldest{%
+ \def\hl@prefix{hldest}%
+ \let\after@hl@getparam\hldest@aftergetparam
+ \begingroup
+ \hl@getparam
+}%
+\def\hldest@aftergetparam{%
+ \ifvmode
+ \hldest@driver
+ \else
+ \allowhyphens
+ \smash{\ifx\hldest@opt@raise\empty \else \raise\hldest@opt@raise\fi
+ \hbox{\hldest@driver}}%
+ \allowhyphens
+ \fi
+ \endgroup
+}%
+\def\@hlstart{%
+ \leavevmode
+ \def\hl@prefix{hl}%
+ \let\after@hl@getparam\hlstart@aftergetparam
+ \begingroup
+ \hl@getparam
+}%
+\def\hlstart@aftergetparam{%
+ \ifx\color\undefined \else
+ \ifx\hl@opt@color\empty \else
+ \ifx\hl@opt@colormodel\empty
+ \edef\temp{\noexpand\color{\hl@opt@color}}%
+ \else
+ \edef\temp{\noexpand\color[\hl@opt@colormodel]{\hl@opt@color}}%
+ \fi
+ \temp
+ \fi
+ \fi
+ \hl@driver
+}%
+\def\hl@getparam#1#2{% We'll read #3 (LABEL) later.
+ \edef\@hltype{#1}%
+ \ifx\@hltype\empty
+ \expandafter\let\expandafter\@hltype
+ \csname \hl@prefix @type\endcsname
+ \fi
+ \expandafter\ifx\csname \hl@prefix @typeh@\@hltype\endcsname \relax
+ \errmessage{Invalid hyperlink type `\@hltype'}%
+ \fi
+ \For\hl@arg:=#2\do{%
+ \ifx\hl@arg\empty \else
+ \expandafter\hl@set@opt\hl@arg=,%
+ \fi
+ }%
+ \bgroup
+ \uncatcodespecials
+ \catcode`\{=1 \catcode`\}=2
+ \@hl@getparam
+}%
+\def\@hl@getparam#1{%
+ \egroup
+ \edef\@hllabel{#1}%
+ \after@hl@getparam
+ \ignorespaces
+}%
+\def\hl@set@opt#1=#2,{%
+ \expandafter\ifx\csname \hl@prefix @opt@#1\endcsname \relax
+ \errmessage{Invalid hyperlink option `#1'}%
+ \fi
+ \if ,#2, % if #2 is empty, complain.
+ \errmessage{Missing value for option `#1'}%
+ \else
+ \def\temp##1={##1}%
+ \expandafter\edef\csname \hl@prefix @opt@#1\endcsname{\temp#2}%
+ \fi
+}%
+\def\hldest@impl#1{%
+ \expandafter\ifcase\csname hldest@on@#1\endcsname
+ \relax\expandafter\gobble
+ \else
+ \toks@=\expandafter{\csname hldest@type@#1\endcsname}%
+ \toks@ii=\expandafter{\csname hldest@opts@#1\endcsname}%
+ \edef\temp{\noexpand\hldest{\the\toks@}{\the\toks@ii}}%
+ \expandafter\temp
+ \fi
+}%
+\def\hlstart@impl#1{%
+ \expandafter\ifcase\csname hl@on@#1\endcsname
+ \leavevmode\expandafter\gobble
+ \else
+ \toks@=\expandafter{\csname hl@type@#1\endcsname}%
+ \toks@ii=\expandafter{\csname hl@opts@#1\endcsname}%
+ \edef\temp{\noexpand\hlstart{\the\toks@}{\the\toks@ii}}%
+ \expandafter\temp
+ \fi
+}%
+\def\hlend@impl#1{%
+ \expandafter\ifcase\csname hl@on@#1\endcsname
+ \else
+ \hlend
+ \fi
+}%
+\def\hl@asterisk@word{*}%
+\def\hl@opts@word{opts}%
+\newif\if@params@override
+\def\hldest@groups{definexref,xrdef,li,eq,bib,foot,footback,idx}%
+\def\hl@groups{ref,xref,eq,cite,foot,footback,idx,url,hrefint,hrefext}%
+\def\hldesttype{%
+ \def\hl@prefix{hldest}%
+ \def\hl@param{type}%
+ \let\hl@all@groups\hldest@groups
+ \futurelet\hl@excl\hl@param@read@excl
+}%
+\def\hldestopts{%
+ \def\hl@prefix{hldest}%
+ \def\hl@param{opts}%
+ \let\hl@all@groups\hldest@groups
+ \futurelet\hl@excl\hl@param@read@excl
+}%
+\def\hltype{%
+ \def\hl@prefix{hl}%
+ \def\hl@param{type}%
+ \let\hl@all@groups\hl@groups
+ \futurelet\hl@excl\hl@param@read@excl
+}%
+\def\hlopts{%
+ \def\hl@prefix{hl}%
+ \def\hl@param{opts}%
+ \let\hl@all@groups\hl@groups
+ \futurelet\hl@excl\hl@param@read@excl
+}%
+\def\hl@param@read@excl{%
+ \ifx!\hl@excl
+ \let\next\hl@param@read@opt@arg
+ \@params@overridetrue
+ \else
+ \def\next{\hl@param@read@opt@arg{!}}%
+ \@params@overridefalse
+ \fi
+ \next
+}%
+\def\hl@param@read@opt@arg#1{% #1 is the `!', ignore it.
+ \@getoptionalarg\hl@setparam
+}%
+\def\@hl@setparam#1{%
+ \ifx\@optionalarg\empty
+ \hl@setparam@default{#1}% Set default.
+ \else
+ \let\hl@do@all@groups\gobble
+ \For\hl@group:=\@optionalarg\do{%
+ \ifx\hl@group\hl@asterisk@word
+ \def\hl@do@all@groups{\let\@optionalarg\hl@all@groups \hl@setparam}%
+ \else
+ \hl@setparam@group{#1}%
+ \fi
+ }%
+ \hl@do@all@groups{#1}%
+ \fi
+}%
+\def\hl@setparam@group#1{%
+ \ifx\hl@group\empty
+ \hl@setparam@default{#1}%
+ \else
+ \expandafter\ifx\csname\hl@prefix @\hl@param @\hl@group\endcsname\relax
+ \errmessage{Hyperlink group `\hl@prefix:\hl@param:\hl@group' is not defined}%
+ \fi
+ \ifx\hl@param\hl@opts@word
+ \if@params@override
+ \expandafter\let\csname\hl@prefix @\hl@param @\hl@group\endcsname\empty
+ \fi
+ \hl@update@opts@with@list{#1}% #1 will be used in the \for
+ \else
+ \ece\def{\hl@prefix @\hl@param @\hl@group}{#1}%
+ \fi
+ \fi
+}%
+\def\hl@setparam@default#1{%
+ \ifx\hl@param\hl@opts@word
+ \For\hl@opt:=#1\do{%
+ \ifx\hl@opt\empty \else
+ \expandafter\hl@set@opt\hl@opt=,%
+ \fi
+ }%
+ \else
+ \expandafter\ifx\csname\hl@prefix @\hl@param\endcsname\relax
+ \message{Default hyperlink parameter `\hl@prefix:\hl@param' is not defined}%
+ \fi
+ \ece\def{\hl@prefix @\hl@param}{#1}%
+ \fi
+}%
+\def\hl@update@opts@with@list#1{%
+ \global\expandafter\let\expandafter\hl@update@new@list
+ \csname \hl@prefix @opts@\hl@group\endcsname
+ \begingroup
+ \For\hl@opt:=#1\do{%
+ \hl@update@opts@with@opt
+ }%
+ \endgroup
+ \ece\let{\hl@prefix @opts@\hl@group}\hl@update@new@list
+}%
+\def\hl@update@opts@with@opt{%
+ \global\let\hl@update@old@list\hl@update@new@list
+ \global\let\hl@update@new@list\empty
+ \global\let\hl@update@new@opt\hl@opt
+ \expandafter\hl@parse@opt@key\hl@opt=,%
+ \let\hl@update@new@key\hl@update@key
+ \global\let\hl@update@comma\empty
+ \begingroup
+ \for\hl@opt:=\hl@update@old@list\do{%
+ \ifx\hl@opt\empty \else % Skip empty `options'.
+ \expandafter\hl@parse@opt@key\hl@opt=,%
+ \toks@=\expandafter{\hl@update@new@list}%
+ \ifx\hl@update@key\hl@update@new@key
+ \ifx\hl@update@new@opt\empty \else % Skip multiple options.
+ \toks@ii=\expandafter{\hl@update@new@opt}%
+ \xdef\hl@update@new@list{\the\toks@\hl@update@comma\the\toks@ii}%
+ \global\let\hl@update@new@opt\empty
+ \global\def\hl@update@comma{,}%
+ \fi
+ \else
+ \toks@ii=\expandafter{\hl@opt}%
+ \xdef\hl@update@new@list{\the\toks@\hl@update@comma\the\toks@ii}%
+ \global\def\hl@update@comma{,}%
+ \fi
+ \fi
+ }%
+ \endgroup
+ \ifx\hl@update@new@opt\empty \else
+ \toks@=\expandafter{\hl@update@new@list}%
+ \toks@ii=\expandafter{\hl@update@new@opt}%
+ \xdef\hl@update@new@list{\the\toks@\hl@update@comma\the\toks@ii}%
+ \fi
+}%
+\def\hl@parse@opt@key#1=#2,{\def\hl@update@key{#1}}%
+\def\hldest@opt@raise{\normalbaselineskip}%
+\def\hl@opt@colormodel{cmyk}%
+\def\hl@opt@color{0.28,1,1,0.35}%
+\def\hldest@on@definexref{0}%
+\def\hldest@on@xrdef{0}%
+\def\hldest@on@li{0}%
+\def\hldest@on@eq{0}% \eqdef and friends
+\def\hldest@on@bib{0}% \biblabelprint (BibTeX)
+\def\hldest@on@foot{0}% \footnote / \numberedfootnote
+\def\hldest@on@footback{0}% back-ref for \footnote / \numberedfootnote
+\def\hldest@on@idx{0}% both `page' dests and `exact' dests
+\let\hldest@type@definexref\empty
+\let\hldest@type@xrdef\empty
+\let\hldest@type@li\empty
+\let\hldest@type@eq\empty % \eqdef and friends
+\let\hldest@type@bib\empty % \biblabelprint (BibTeX)
+\let\hldest@type@foot\empty % \footnote / \numberedfootnote
+\let\hldest@type@footback\empty % back-ref for \footnote / \numberedfootnote
+\let\hldest@type@idx\empty % both `page' dests and `exact' dests
+\let\hldest@opts@definexref\empty
+\let\hldest@opts@xrdef\empty
+\let\hldest@opts@li\empty
+\def\hldest@opts@eq{raise=1.7\normalbaselineskip}% \eqdef and friends
+\let\hldest@opts@bib\empty % \biblabelprint (BibTeX)
+\let\hldest@opts@foot\empty % \footnote / \numberedfootnote
+\let\hldest@opts@footback\empty % back-ref for \footnote / \numberedfootnote
+\let\hldest@opts@idx\empty % both `page' dests and `exact' dests
+\def\hl@on@ref{0}% \refn and \xrefn, \ref, \refs
+\def\hl@on@xref{0}%
+\def\hl@on@eq{0}% \eqref and \eqrefn
+\def\hl@on@cite{0}% \cite (BibTeX)
+\def\hl@on@foot{0}% \footnote / \numberedfootnote
+\def\hl@on@footback{0}% back-reference for \footnote / \numberedfootnote
+\def\hl@on@idx{0}%
+\def\hl@on@url{0}% \url from url.sty
+\def\hl@on@hrefint{0}% \href with internal #labels
+\def\hl@on@hrefext{0}% \href with external labels (URLs)
+\let\hl@type@ref\empty % \refn and \xrefn, \ref, \refs
+\let\hl@type@xref\empty
+\let\hl@type@eq\empty % \eqref and \eqrefn
+\let\hl@type@cite\empty % \cite (BibTeX)
+\let\hl@type@foot\empty % \footnote / \numberedfootnote
+\let\hl@type@footback\empty % back-reference for \footnote / \numberedfootnote
+\let\hl@type@idx\empty
+\let\hl@type@url\empty % \url from url.sty (this will be set to `url' by
+\let\hl@type@hrefint\empty % \href with internal #labels
+\let\hl@type@hrefext\empty % \href with external labels (URLs) (this
+\let\hl@opts@ref\empty % \refn and \xrefn, \ref, \refs
+\let\hl@opts@xref\empty
+\let\hl@opts@eq\empty % \eqref and \eqrefn
+\let\hl@opts@cite\empty % \cite (BibTeX)
+\let\hl@opts@foot\empty % \footnote / \numberedfootnote
+\let\hl@opts@footback\empty % back-reference for \footnote / \numberedfootnote
+\let\hl@opts@idx\empty
+\let\hl@opts@url\empty % \url from url.sty
+\let\hl@opts@hrefint\empty % \href with internal #labels
+\let\hl@opts@hrefext\empty % \href with external labels (URLs)
+\def\@hlon{\@hlonoff@value@stub{hl}\@@hlon1 }%
+\def\@hloff{\@hlonoff@value@stub{hl}\@@hloff0 }%
+\def\@hldeston{\@hlonoff@value@stub{hldest}\@@hldeston1 }%
+\def\@hldestoff{\@hlonoff@value@stub{hldest}\@@hldestoff0 }%
+\def\@hlonoff@value@stub#1#2#3{%
+ \def\hl@prefix{#1}%
+ \let\hl@on@empty#2%
+ \def\hl@value{#3}%
+ \expandafter\let\expandafter\hl@all@groups
+ \csname \hl@prefix @groups\endcsname
+ \@getoptionalarg\@finhlswitch
+}%
+\def\@finhlswitch{%
+ \ifx\@optionalarg\empty
+ \hl@on@empty
+ \fi
+ \let\hl@do@all@groups\relax
+ \For\hl@group:=\@optionalarg\do{%
+ \ifx\hl@group\hl@asterisk@word
+ \let\@optionalarg\hl@all@groups
+ \let\hl@do@all@groups\@finhlswitch
+ \else
+ \ifx\hl@group\empty
+ \hl@on@empty
+ \else
+ \expandafter\ifx\csname\hl@prefix @on@\hl@group\endcsname \relax
+ \errmessage{Hyperlink group `\hl@prefix:on:\hl@group'
+ is not defined}%
+ \fi
+ \ece\edef{\hl@prefix @on@\hl@group}{\hl@value}%
+ \fi
+ \fi
+ }%
+ \hl@do@all@groups
+}%
+\def\@@hlon{%
+ \let\hlstart\@hlstart
+ \let\hlend\@hlend
+}%
+\def\@@hloff{%
+ \def\hlstart##1##2##3{\leavevmode\ignorespaces}%
+ \let\hlend\relax
+}%
+\def\@@hldeston{%
+ \let\hldest\@hldest
+}%
+\def\@@hldestoff{%
+ \def\hldest##1##2##3{\ignorespaces}%
+}%
+\def\hl@idxexact@word{idxexact}%
+\def\hl@idxpage@word{idxpage}%
+\def\hl@idxnone@word{idxnone}%
+\def\hl@raw@word{raw}%
+\def\enablehyperlinks{\@getoptionalarg\@finenablehyperlinks}%
+\def\@finenablehyperlinks{%
+ \let\hl@selecteddriver\empty
+ \def\hldest@place@idx{0}%
+ \for\hl@arg:=\@optionalarg\do{%
+ \ifx\hl@arg\hl@idxexact@word
+ \def\hldest@place@idx{1}%
+ \else
+ \ifx\hl@arg\hl@idxnone@word
+ \def\hldest@place@idx{-1}%
+ \else
+ \ifx\hl@arg\hl@idxpage@word
+ \def\hldest@place@idx{0}%
+ \else
+ \let\hl@selecteddriver\hl@arg
+ \fi
+ \fi
+ \fi
+ }%
+ \ifx\hl@selecteddriver\empty
+ \ifpdf
+ \def\hl@selecteddriver{pdftex}%
+ \message{^^JEplain: using `pdftex' hyperlink driver.}%
+ \else
+ \def\hl@selecteddriver{hypertex}%
+ \message{^^JEplain: using `hypertex' hyperlink driver.}%
+ \fi
+ \else
+ \expandafter\ifx\csname hldriver@\hl@selecteddriver\endcsname \relax
+ \errmessage{No hyperlink driver `\hl@selecteddriver' available}%
+ \fi
+ \fi
+ \let\hl@setparam\@hl@setparam
+ \csname hldriver@\hl@selecteddriver\endcsname
+ \def\@finenablehyperlinks{\errmessage{Hyperlink driver `\hl@selecteddriver'
+ already selected}}%
+ \let\hldriver@nolinks\undefined
+ \let\hldriver@hypertex\undefined
+ \let\hldriver@pdftex \undefined
+ \let\hldriver@dvipdfm\undefined
+ \let\hloff\@hloff
+ \let\hlon\@hlon
+ \let\hldestoff\@hldestoff
+ \let\hldeston\@hldeston
+ \hlon[*,]\hloff[foot,footback]%
+ \hldeston[*,]\hldestoff[foot,footback]%
+}%
+\def\hldriver@nolinks{%
+ \def\@hldest##1##2##3{%
+ \edef\temp{\write-1{hldest: ##3}}%
+ \ifvmode
+ \temp
+ \else
+ \allowhyphens
+ \expandafter\smash\expandafter{\temp}%
+ \allowhyphens
+ \fi
+ \ignorespaces
+ }%
+ \def\@hlstart##1##2##3{%
+ \leavevmode
+ \begingroup % Start the color group.
+ \edef\temp{\write-1{hlstart: ##3}}%
+ \temp
+ \ignorespaces
+ }%
+ \def\@hlend{%
+ \edef\temp{\write-1{hlend}}%
+ \temp
+ \endgroup % End the color group from \@hlstart.
+ }%
+ \let\hl@setparam\gobble
+}%
+{\catcode`\#=\other
+\gdef\hlhash{#}}%
+\def\hldriver@hypertex{%
+ \def\hldest@type{xyz}%
+ \let\hldest@opt@cmd \empty
+ \def\hldest@driver{%
+ \ifx\@hltype\hl@raw@word
+ \csname \hldest@opt@cmd \endcsname
+ \else
+ \special{html:<a name="\@hllabel">}\special{html:</a>}%
+ \fi
+ }%
+ \let\hldest@typeh@raw \empty
+ \let\hldest@typeh@xyz \empty
+ \def\hl@type{name}%
+ \ifx\hl@type@url\empty
+ \def\hl@type@url{url}%
+ \fi
+ \ifx\hl@type@hrefext\empty
+ \def\hl@type@hrefext{url}%
+ \fi
+ \let\hl@opt@cmd \empty
+ \let\hl@opt@ext \empty
+ \let\hl@opt@file \empty
+ \def\hl@driver{%
+ \ifx\@hltype\hl@raw@word
+ \csname \hl@opt@cmd \endcsname
+ \else
+ \def\hlstart@preamble{html:<a href="}%
+ \csname hl@typeh@\@hltype\endcsname
+ \fi
+ }%
+ \let\hl@typeh@raw \empty
+ \def\hl@typeh@name{\special{\hlstart@preamble \hlhash\@hllabel">}}%
+ \def\hl@typeh@filename{%
+ \special{%
+ \hlstart@preamble
+ file:\hl@opt@file\hl@opt@ext
+ \ifempty\@hllabel \else \hlhash\@hllabel\fi
+ ">%
+ }%
+ }%
+ \def\hl@typeh@url{%
+ \special{%
+ \hlstart@preamble
+ \@hllabel
+ ">%
+ }%
+ }%
+ \def\@hlend{\special{html:</a>}\endgroup}% End the group from \@hlstart.
+}%
+\def\hldriver@pdftex{%
+\ifpdf % PDF output is enabled.
+ \def\hldest@type{xyz}%
+ \let\hldest@opt@width \empty
+ \let\hldest@opt@height \empty
+ \let\hldest@opt@depth \empty
+ \let\hldest@opt@zoom \empty
+ \let\hldest@opt@cmd \empty
+ \def\hldest@driver{%
+ \ifx\@hltype\hl@raw@word
+ \csname \hldest@opt@cmd \endcsname
+ \else
+ \pdfdest name{\@hllabel}\@hltype
+ \csname hldest@typeh@\@hltype\endcsname
+ \fi
+ }%
+ \let\hldest@typeh@raw \empty
+ \let\hldest@typeh@fit \empty
+ \let\hldest@typeh@fith \empty
+ \let\hldest@typeh@fitv \empty
+ \let\hldest@typeh@fitb \empty
+ \let\hldest@typeh@fitbh \empty
+ \let\hldest@typeh@fitbv \empty
+ \def\hldest@typeh@fitr{%
+ \ifx\hldest@opt@width \empty \else width \hldest@opt@width \fi
+ \ifx\hldest@opt@height \empty \else height \hldest@opt@height \fi
+ \ifx\hldest@opt@depth \empty \else depth \hldest@opt@depth \fi
+ }%
+ \def\hldest@typeh@xyz{%
+ \ifx\hldest@opt@zoom\empty \else zoom \hldest@opt@zoom \fi
+ }%
+ \def\hl@type{name}%
+ \ifx\hl@type@url\empty
+ \def\hl@type@url{url}%
+ \fi
+ \ifx\hl@type@hrefext\empty
+ \def\hl@type@hrefext{url}%
+ \fi
+ \let\hl@opt@width \empty
+ \let\hl@opt@height \empty
+ \let\hl@opt@depth \empty
+ \def\hl@opt@bstyle {S}%
+ \def\hl@opt@bwidth {1}%
+ \let\hl@opt@bcolor \empty
+ \let\hl@opt@hlight \empty
+ \let\hl@opt@bdash \empty
+ \let\hl@opt@pagefit \empty
+ \let\hl@opt@cmd \empty
+ \let\hl@opt@file \empty
+ \let\hl@opt@newwin \empty
+ \def\hl@driver{%
+ \ifx\@hltype\hl@raw@word
+ \csname \hl@opt@cmd \endcsname
+ \else
+ \let\hl@BSspec\relax % construct
+ \ifx\hl@opt@bstyle \empty
+ \ifx\hl@opt@bwidth \empty
+ \ifx\hl@opt@bdash \empty
+ \let\hl@BSspec\empty % don't construct
+ \fi
+ \fi
+ \fi
+ \def\hlstart@preamble{%
+ \pdfstartlink
+ \ifx\hl@opt@width \empty \else width \hl@opt@width \fi
+ \ifx\hl@opt@height \empty \else height \hl@opt@height \fi
+ \ifx\hl@opt@depth \empty \else depth \hl@opt@depth \fi
+ attr{%
+ \ifx\hl@opt@bcolor\empty\else /C[\hl@opt@bcolor]\fi
+ \ifx\hl@opt@hlight\empty\else /H/\hl@opt@hlight\fi
+ \ifx\hl@BSspec\relax
+ /BS<<%
+ /Type/Border%
+ \ifx\hl@opt@bstyle\empty\else /S/\hl@opt@bstyle\fi
+ \ifx\hl@opt@bwidth\empty\else /W \hl@opt@bwidth\fi
+ \ifx\hl@opt@bdash\empty \else /D[\hl@opt@bdash]\fi
+ >>%
+ \fi
+ }%
+ }%
+ \csname hl@typeh@\@hltype\endcsname
+ \fi
+ }%
+ \let\hl@typeh@raw\empty
+ \def\hl@typeh@name{\hlstart@preamble goto name{\@hllabel}}%
+ \def\hl@typeh@num{\hlstart@preamble goto num \@hllabel}%
+ \def\hl@typeh@page{%
+ \count@=\@hllabel
+ \advance\count@ by-1
+ \hlstart@preamble
+ user{%
+ /Subtype/Link%
+ /Dest%
+ [\the\count@
+ \ifx\hl@opt@pagefit\empty/Fit\else\hl@opt@pagefit\fi]%
+ }%
+ }%
+ \def\hl@typeh@filename{\hl@file{(\@hllabel)}}%
+ \def\hl@typeh@filepage{%
+ \count@=\@hllabel
+ \advance\count@ by-1
+ \hl@file{%
+ [\the\count@ \ifx\hl@opt@pagefit\empty/Fit\else\hl@opt@pagefit\fi]%
+ }%
+ }%
+ \def\hl@file##1{%
+ \hlstart@preamble
+ user{%
+ /Subtype/Link%
+ /A<<%
+ /Type/Action%
+ /S/GoToR%
+ /D##1%
+ /F(\hl@opt@file)%
+ \ifx\hl@opt@newwin\empty \else
+ /NewWindow \ifcase\hl@opt@newwin false\else true\fi
+ \fi
+ >>%
+ }%
+ }%
+ \def\hl@typeh@url{%
+ \hlstart@preamble
+ user{%
+ /Subtype/Link%
+ /A<<%
+ /Type/Action%
+ /S/URI%
+ /URI(\@hllabel)%
+ >>%
+ }%
+ }%
+ \def\@hlend{\pdfendlink\endgroup}% End the group from the \@hlstart.
+\else % PDF output is not enabled.
+ \message{Eplain warning: `pdftex' hyperlink driver: PDF output is^^J
+ \space not enabled, falling back on `nolinks' driver.}%
+ \hldriver@nolinks
+\fi
+}%
+\def\hldriver@dvipdfm{%
+ \def\hldest@type{xyz}%
+ \let\hldest@opt@left \empty
+ \let\hldest@opt@top \empty
+ \let\hldest@opt@right \empty
+ \let\hldest@opt@bottom \empty
+ \let\hldest@opt@zoom \empty
+ \let\hldest@opt@cmd \empty
+ \def\hldest@driver{%
+ \ifx\@hltype\hl@raw@word
+ \csname \hldest@opt@cmd \endcsname
+ \else
+ \def\hldest@preamble{%
+ pdf: dest (\@hllabel) [@thispage
+ }%
+ \csname hldest@typeh@\@hltype\endcsname
+ \fi
+ }%
+ \let\hldest@typeh@raw\empty
+ \def\hldest@typeh@fit{%
+ \special{\hldest@preamble /Fit]}%
+ }%
+ \def\hldest@typeh@fith{%
+ \special{\hldest@preamble /FitH
+ \ifx\hldest@opt@top\empty @ypos \else \hldest@opt@top \fi]}%
+ }%
+ \def\hldest@typeh@fitv{%
+ \special{\hldest@preamble /FitV
+ \ifx\hldest@opt@left\empty @xpos \else \hldest@opt@left \fi]}%
+ }%
+ \def\hldest@typeh@fitb{%
+ \special{\hldest@preamble /FitB]}%
+ }%
+ \def\hldest@typeh@fitbh{%
+ \special{\hldest@preamble /FitBH
+ \ifx\hldest@opt@top\empty @ypos \else \hldest@opt@top \fi]}%
+ }%
+ \def\hldest@typeh@fitbv{%
+ \special{\hldest@preamble /FitBV
+ \ifx\hldest@opt@left\empty @xpos \else \hldest@opt@left \fi]}%
+ }%
+ \def\hldest@typeh@fitr{%
+ \special{\hldest@preamble /FitR
+ \ifx\hldest@opt@left\empty @xpos\else\hldest@opt@left\fi\space
+ \ifx\hldest@opt@bottom\empty @ypos\else\hldest@opt@bottom\fi\space
+ \ifx\hldest@opt@right\empty @xpos\else\hldest@opt@right\fi\space
+ \ifx\hldest@opt@top\empty @ypos\else\hldest@opt@top \fi]}%
+ }%
+ \def\hldest@typeh@xyz{%
+ \begingroup
+ \ifx\hldest@opt@zoom\empty
+ \count1=\z@ \count2=\z@
+ \else
+ \count2=\hldest@opt@zoom
+ \count1=\count2 \divide\count1 by 1000
+ \count3=\count1 \multiply\count3 by 1000
+ \advance\count2 by -\count3
+ \fi
+ \special{\hldest@preamble /XYZ
+ \ifx\hldest@opt@left\empty @xpos\else\hldest@opt@left\fi\space
+ \ifx\hldest@opt@top\empty @ypos\else\hldest@opt@top\fi\space
+ \the\count1.\the\count2]}%
+ \endgroup
+ }%
+ \def\hl@type{name}%
+ \ifx\hl@type@url\empty
+ \def\hl@type@url{url}%
+ \fi
+ \ifx\hl@type@hrefext\empty
+ \def\hl@type@hrefext{url}%
+ \fi
+ \def\hl@opt@bstyle {S}%
+ \def\hl@opt@bwidth {1}%
+ \let\hl@opt@bcolor \empty
+ \let\hl@opt@hlight \empty
+ \let\hl@opt@bdash \empty
+ \let\hl@opt@pagefit \empty
+ \let\hl@opt@cmd \empty
+ \let\hl@opt@file \empty
+ \let\hl@opt@newwin \empty
+ \def\hl@driver{%
+ \ifx\@hltype\hl@raw@word
+ \csname \hl@opt@cmd \endcsname
+ \else
+ \let\hl@BSspec\relax % construct
+ \ifx\hl@opt@bstyle \empty
+ \ifx\hl@opt@bwidth \empty
+ \ifx\hl@opt@bdash \empty
+ \let\hl@BSspec\empty % don't construct
+ \fi
+ \fi
+ \fi
+ \def\hlstart@preamble{%
+ pdf: beginann
+ <<%
+ /Type/Annot%
+ /Subtype/Link%
+ \ifx\hl@opt@bcolor\empty\else /C[\hl@opt@bcolor]\fi
+ \ifx\hl@opt@hlight\empty\else /H/\hl@opt@hlight\fi
+ \ifx\hl@BSspec\relax
+ /BS<<%
+ /Type/Border%
+ \ifx\hl@opt@bstyle\empty\else /S/\hl@opt@bstyle\fi
+ \ifx\hl@opt@bwidth\empty\else /W \hl@opt@bwidth\fi
+ \ifx\hl@opt@bdash\empty \else /D[\hl@opt@bdash]\fi
+ >>%
+ \fi
+ }%
+ \csname hl@typeh@\@hltype\endcsname
+ \fi
+ }%
+ \let\hl@typeh@raw\empty
+ \def\hl@typeh@name{\special{\hlstart@preamble /Dest(\@hllabel)>>}}%
+ \def\hl@typeh@page{%
+ \count@=\@hllabel
+ \advance\count@ by-1
+ \special{%
+ \hlstart@preamble
+ /Dest[\the\count@
+ \ifx\hl@opt@pagefit\empty/Fit\else\hl@opt@pagefit\fi]%
+ >>%
+ }%
+ }%
+ \def\hl@typeh@filename{\hl@file{(\@hllabel)}}%
+ \def\hl@typeh@filepage{%
+ \count@=\@hllabel
+ \advance\count@ by-1
+ \hl@file{%
+ [\the\count@ \ifx\hl@opt@pagefit\empty/Fit\else\hl@opt@pagefit\fi]%
+ }%
+ }%
+ \def\hl@file##1{%
+ \special{%
+ \hlstart@preamble
+ /A<<%
+ /Type/Action%
+ /S/GoToR%
+ /D##1%
+ /F(\hl@opt@file)%
+ \ifx\hl@opt@newwin\empty \else
+ /NewWindow \ifcase\hl@opt@newwin false\else true\fi
+ \fi
+ >>%
+ >>%
+ }%
+ }%
+ \def\hl@typeh@url{%
+ \special{%
+ \hlstart@preamble
+ /A<<%
+ /Type/Action%
+ /S/URI%
+ /URI(\@hllabel)%
+ >>%
+ >>%
+ }%
+ }%
+ \def\@hlend{\special{pdf: endann}\endgroup}% End the group from \@hlstart.
+}%
+\def\href{%
+ \bgroup
+ \uncatcodespecials
+ \catcode`\{=1 \catcode`\}=2
+ \@href
+}%
+\def\@href#1{% We'll read #2 (TEXT) later.
+ \egroup
+ \edef\@hreftmp{\ifempty{#1}{}\fi}% Parameter stuffing for \@@href.
+ \expandafter\@@href\@hreftmp#1\@@
+}%
+\def\href@end@int{\hlend@impl{hrefint}}%
+\def\href@end@ext{\hlend@impl{hrefext}}%
+\def\@@href#1#2\@@{%
+ \def\@hreftmp{#1}%
+ \ifx\@hreftmp\hlhash
+ \let\href@end\href@end@int
+ \hlstart@impl{hrefint}{#2}%
+ \else
+ \let\href@end\href@end@ext
+ \hlstart@impl{hrefext}{#1#2}%
+ \fi
+ \@@@href
+}%
+\def\@@@href{%
+ \futurelet\@hreftmp\href@
+}%
+\def\href@{%
+ \ifcat\bgroup\noexpand\@hreftmp
+ \let\@hreftmp\href@@
+ \else
+ \let\@hreftmp\href@@@
+ \fi
+ \@hreftmp
+}%
+\def\href@@{\bgroup\aftergroup\href@end \let\@hreftmp}%
+\def\href@@@#1{#1\href@end}%
+\def\hldeston{\errmessage{Please enable hyperlinks with
+ \string\enablehyperlinks\space before using hyperlink commands
+ (consider selecting the `nolinks' driver to ignore all hyperlink
+ commands in your document)}}%
+\let\hldestoff\hldeston \let\hlon\hldeston \let\hloff\hldeston
+\let\hlstart\hldeston \let\hlend\hldeston \let\hldest\hldeston
+\let\hl@setparam\hldeston
+\@hloff[*]\@hldestoff[*]%
+\newif\ifusepkg@miniltx@loaded
+\newcount\usepkg@recursion@level
+\def\usepkg@rcrs{\the\usepkg@recursion@level}%
+\let\usepkg@at@begin@document\empty
+\let\usepkg@at@end@of@package\empty
+\def\usepkg@word@autopict{autopict}%
+\def\usepkg@word@psfrag{psfrag}%
+\long\def\beginpackages#1\endpackages{%
+ \let\usepackage\real@usepackage
+ \let\DoNotLoadEpstopdf=t
+ \let\eplaininput=\input
+ #1%
+ \usepkg@at@begin@document
+ \global\let\usepkg@at@begin@document\empty
+ \global\let\usepackage\fake@usepackage
+ \let\packageinput=\input
+ \let\input=\eplaininput
+ \ifx\resetatcatcode\@undefined \else\resetatcatcode \fi
+}%
+\def\fake@usepackage{\errmessage{You should not use \string\usepackage\space outside of^^J
+ \@spaces\string\beginpackages...\string\endpackages\space environment}%
+}%
+\def\eplain@RequirePackage{%
+ \global\ece\let{usepkg@save@pkg\usepkg@rcrs}\usepkg@pkg
+ \global\ece\let{usepkg@save@options\usepkg@rcrs}\usepkg@options
+ \global\ece\let{usepkg@save@date\usepkg@rcrs}\usepkg@date
+ \global\ece\let{usepkg@at@end@of@package\usepkg@rcrs}\usepkg@at@end@of@package
+ \global\advance\usepkg@recursion@level by\@ne
+ \real@usepackage
+}%
+\let\usepackage\fake@usepackage
+\def\real@usepackage{\@getoptionalarg\@finusepackage}%
+\def\@finusepackage#1{%
+ \let\usepkg@options\@optionalarg
+ \ifempty{#1}%
+ \errmessage{No packages specified}%
+ \fi
+ \ifusepkg@miniltx@loaded \else
+ \testfileexistence[miniltx]{tex}%
+ \if@fileexists
+ \input miniltx.tex
+ \global\usepkg@miniltx@loadedtrue
+ \global\let\RequirePackage\eplain@RequirePackage
+ \global\let\DeclareOption\eplain@DeclareOption
+ \global\let\PassOptionsToPackage\eplain@PassOptionsToPackage
+ \global\let\ExecuteOptions\eplain@ExecuteOptions
+ \gdef\ProcessOptions{\@ifstar\eplain@ProcessOptions
+ \eplain@ProcessOptions}%
+ \global\let\AtBeginDocument\eplain@AtBeginDocument
+ \global\let\AtEndOfPackage\eplain@AtEndOfPackage
+ \global\let\ProvidesFile\eplain@ProvidesFile
+ \global\let\ProvidesPackage\eplain@ProvidesPackage
+ \else
+ \errmessage{miniltx.tex not found, cannot load LaTeX packages}%
+ \fi
+ \fi
+ \@ifnextchar[%]
+ {\@finfinusepackage{#1}}%
+ {\@finfinusepackage{#1}[]}%
+}%
+\def\@finfinusepackage#1[#2]{%
+ \edef\usepkg@date{#2}%
+ \let\usepkg@load@list\empty
+ \for\usepkg@pkg:=#1\do{%
+ \toks@=\expandafter{\usepkg@load@list}%
+ \edef\usepkg@load@list{%
+ \the\toks@
+ \noexpand\usepkg@load@pkg{\usepkg@pkg}%
+ }%
+ }%
+ \usepkg@load@list
+ \ifnum\usepkg@recursion@level>0
+ \global\advance\usepkg@recursion@level by\m@ne
+ \expandafter\let\expandafter\usepkg@pkg\csname usepkg@save@pkg\usepkg@rcrs\endcsname
+ \expandafter\let\expandafter\usepkg@options\csname usepkg@save@options\usepkg@rcrs\endcsname
+ \expandafter\let\expandafter\usepkg@date\csname usepkg@save@date\usepkg@rcrs\endcsname
+ \expandafter\let\expandafter\usepkg@at@end@of@package\csname usepkg@at@end@of@package\usepkg@rcrs\endcsname
+ \global\ece\let{usepkg@save@pkg\usepkg@rcrs}\undefined
+ \global\ece\let{usepkg@save@options\usepkg@rcrs}\undefined
+ \global\ece\let{usepkg@save@date\usepkg@rcrs}\undefined
+ \global\ece\let{usepkg@at@end@of@package\usepkg@rcrs}\undefined
+ \fi
+}%
+\def\usepkg@load@pkg#1{%
+ \def\usepkg@pkg{#1}%
+ \ifx\usepkg@pkg\usepkg@word@autopict
+ \testfileexistence[picture]{tex}%
+ \if@fileexists \else
+ \errmessage{Loader `picture.tex' for package `\usepkg@pkg' not found}%
+ \fi
+ \else
+ \ifx\usepkg@pkg\usepkg@word@psfrag
+ \testfileexistence[psfrag]{tex}%
+ \if@fileexists \else
+ \errmessage{Loader `psfrag.tex' for package `\usepkg@pkg' not found}%
+ \fi
+ \fi
+ \fi
+ \ifundefined{ver@\usepkg@pkg.sty}%
+ \expandafter\@finusepkg@load@pkg
+ \else
+ \immediate\write-1{^^J\linenumber Eplain: package `\usepkg@pkg' already
+ loaded, skipping reloading}%
+ \fi
+}%
+\def\@finusepkg@load@pkg{%
+ \testfileexistence[\usepkg@pkg]{sty}%
+ \if@fileexists \else
+ \errmessage{Package `\usepkg@pkg' not found}%
+ \fi
+ \expandafter\let\expandafter\temp\csname usepkg@options@\usepkg@pkg\endcsname
+ \ifx\temp\relax
+ \let\temp\empty
+ \fi
+ \ifx\temp\empty
+ \let\temp\usepkg@options
+ \else
+ \ifx\usepkg@options\empty \else
+ \edef\temp{\temp,\usepkg@options}%
+ \fi
+ \fi
+ \global\ece\let{usepkg@options@\usepkg@pkg}\temp
+ \let\usepackage\eplain@RequirePackage
+ \global\let\usepkg@at@end@of@package\empty
+ \ifx\usepkg@pkg\usepkg@word@autopict
+ \input picture.tex
+ \else
+ \ifx\usepkg@pkg\usepkg@word@psfrag
+ \input \usepkg@pkg.tex
+ \else
+ \input \usepkg@pkg.sty
+ \fi
+ \fi
+ \usepkg@at@end@of@package
+ \global\let\usepkg@at@end@of@package\empty
+ \let\usepackage\real@usepackage
+ \global\ece\let{usepkg@options@\usepkg@pkg}\undefined
+ \def\Url@HyperHook##1{\hlstart@impl{url}{\Url@String}##1\hlend@impl{url}}%
+}%
+\def\eplain@DeclareOption#1#2{%
+ \toks@{#2}%
+ \expandafter\xdef\csname usepkg@option@\usepkg@pkg @#1\endcsname{\the\toks@}%
+}%
+\def\eplain@PassOptionsToPackage#1#2{%
+ \ifempty{#1}\else
+ \for\usepkg@temp:=#2\do{%
+ \expandafter\let\expandafter\temp\csname usepkg@options@\usepkg@temp\endcsname
+ \ifx\temp\relax
+ \let\temp\empty
+ \fi
+ \ifx\temp\empty
+ \edef\temp{#1}%
+ \else
+ \edef\temp{\temp,#1}%
+ \fi
+ \global\ece\let{usepkg@options@\usepkg@temp}\temp
+ }%
+ \fi
+}%
+\def\usepkg@exec@options#1{%
+ \for\CurrentOption:=#1\do{%
+ \expandafter\let\expandafter\usepkg@temp
+ \csname usepkg@option@\usepkg@pkg @\CurrentOption\endcsname
+ \ifx\usepkg@temp\relax
+ \expandafter\let\expandafter\temp\csname usepkg@option@\usepkg@pkg @*\endcsname
+ \ifx\temp\relax
+ \errmessage{Unknown option `\CurrentOption' to package `\usepkg@pkg'}%
+ \else
+ \temp
+ \fi
+ \else
+ \usepkg@temp
+ \fi
+ }%
+}%
+\let\eplain@ExecuteOptions\usepkg@exec@options
+\def\eplain@ProcessOptions{%
+ \expandafter\usepkg@exec@options\csname usepkg@options@\usepkg@pkg\endcsname
+}%
+\def\usepkg@accumulate@cmds#1#2{%
+ \toks@=\expandafter{#1}%
+ \toks@ii={#2}%
+ \xdef#1{\the\toks@\the\toks@ii}%
+}%
+\def\eplain@AtBeginDocument{\usepkg@accumulate@cmds\usepkg@at@begin@document}%
+\def\eplain@AtEndOfPackage{\usepkg@accumulate@cmds\usepkg@at@end@of@package}%
+\def\eplain@ProvidesPackage#1{%
+ \@ifnextchar[%]
+ {\eplain@pr@videpackage{#1.sty}}{\eplain@pr@videpackage#1[]}%
+}%
+\def\eplain@pr@videpackage#1[#2]{%
+ \wlog{#1: #2}%
+ \expandafter\xdef\csname ver@#1\endcsname{#2}%
+ \@ifl@t@r{#2}\usepkg@date{}%
+ {\message{Warning: you have requested package `\usepkg@pkg', version \usepkg@date,^^J
+ \@spaces but only version `\csname ver@#1\endcsname' is available.}}%
+}%
+\def\eplain@ProvidesFile#1{%
+ \@ifnextchar[%]
+ {\eplain@pr@videfile{#1}}{\eplain@pr@videfile#1[]}%
+}%
+\def\eplain@pr@videfile#1[#2]{%
+ \wlog{#1: #2}%
+ \expandafter\xdef\csname ver@#1\endcsname{#2}%
+}%
+\def\@ifl@ter#1#2{%
+ \expandafter\@ifl@t@r
+ \csname ver@#2.#1\endcsname
+}%
+\def\@ifl@t@r#1#2{%
+ \ifnum\expandafter\@parse@version#1//00\@nil<%
+ \expandafter\@parse@version#2//00\@nil
+ \expandafter\@secondoftwo
+ \else
+ \expandafter\@firstoftwo
+ \fi
+}%
+\def\@parse@version#1/#2/#3#4#5\@nil{#1#2#3#4 }%
+\let\ttfamily\tt
+\def\strip@prefix#1>{}%
+\def\@ifpackageloaded#1{%
+ \expandafter\ifx\csname ver@#1.sty\endcsname\relax
+ \expandafter\@secondoftwo
+ \else
+ \expandafter\@firstoftwo
+ \fi
+}%
+\long\def\g@addto@macro#1#2{%
+ \begingroup
+ \toks@\expandafter{#1#2}%
+ \xdef#1{\the\toks@}%
+ \endgroup
+}%
+\def\PackageWarning#1#2{%
+ \begingroup
+ \newlinechar=10 %
+ \def\MessageBreak{%
+ ^^J(#1)\@spaces\@spaces\@spaces\@spaces
+ }%
+ \immediate\write16{^^JPackage #1 Warning: #2\on@line.^^J}%
+ \endgroup
+}%
+\def\PackageWarningNoLine#1#2{%
+ \PackageWarning{#1}{#2\@gobble}%
+}%
+\def\on@line{ on input line \the\inputlineno}%
+\def\@spaces{\space\space\space\space}%
+\def\@inmatherr#1{%
+ \relax
+ \ifmmode
+ \errmessage{The command is invalid in math mode}%
+ \fi
+}%
+\let\protected@edef\edef
+\let\wlog = \@plainwlog
+\catcode`@ = \@eplainoldatcode
+\def\fmtname{eplain}%
+\def\eplain{t}%
+{\edef\plainversion{\fmtversion}%
+ \xdef\fmtversion{3.9: 30 May 2019 (and plain \plainversion)}%
+}%
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-11 05:43:31 +0000