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authorKarl Berry <karl@freefriends.org>2006-01-12 23:55:08 +0000
committerKarl Berry <karl@freefriends.org>2006-01-12 23:55:08 +0000
commit41236dcc49acdc34938558d30f5614826711e2d8 (patch)
tree489310c658f2d6931e2236eea2d81620e8683594 /Master/texmf-dist/tex/latex/etex
parenta8f7dd2188a3be7ad9bacf511a79c28c2de2f14a (diff)
etex
git-svn-id: svn://tug.org/texlive/trunk@880 c570f23f-e606-0410-a88d-b1316a301751
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+
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{etex}
+% [1997/08/12 v0.1 eTeX basic definition package (DPC)]
+ [1998/03/26 v2.0 eTeX basic definition package (PEB)]
+
+\DeclareOption{grouptypes}{\catcode`\G=9}
+\DeclareOption{interactionmodes}{\catcode`\I=9}
+\DeclareOption{nodetypes}{\catcode`\N=9}
+\DeclareOption{iftypes}{\catcode`\C=9}
+\DeclareOption{localalloclog}{\let\et@xwlog\wlog} % the default
+\DeclareOption{localallocnolog}{\let\et@xwlog\@gobble} % be quiet
+\DeclareOption{localallocshow}{\let\et@xwlog\typeout} % debugging
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%% A basic interface to some etex primitives, closely modeled on
+%% etex.src and etexdefs.lib provided by the core etex team.
+
+%% The etex.src `module' system is not copied here, the standard
+%% LaTeX package option mechanism is used instead,
+%% however the package options match the module names.
+%% (Currently grouptypes, interactionmodes, nodetypes, iftypes.)
+%% The individual type names are different too: We use, e.g.,
+%%
+%% `\bottomleveltype' and `\simplegrouptype' instead of
+%% `\grouptypes{bottomlevel}' and `\grouptypes{simple}'.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%% Other Comments...
+
+%% The names of the `interactionmodes' are not too good.
+%% In particular \scroll and \batch are likely to clash with existing
+%% uses. These names have been changed into \batchinteractionmode,
+%% \scrollinteractionmode etc.
+%% Similarly, the names of the `groupetypes' have been changed, in
+%% particular \mathgroup would conflict with the LaTeX kernel.
+
+%% \etex logo could have the same trick as \LaTeXe to pick up a bold
+%% epsilon when needed. (Not done here, I hate wasting tokens on logos.)
+%% This version does have a \m@th not in the original.
+
+%% The \globcountvector, \loccountvector, etc. allocation macros are
+%% not (yet) implemented.
+
+%% Currently if run on a standard TeX, the package generates an error.
+%% Perhaps it should instead load some code to try to fake
+%% the new etex primitives in that case???
+%% Likewise, the package generates an error when used with e-TeX V 1
+
+%% The etex.src language mechanism is not copied here. That facility
+%% does not use any of the etex features. LaTeX should be customised
+%% using the same hyphen.cfg mechanism as for a format built with a
+%% standard TeX.
+
+%% David Carlisle
+
+%% Upgraded for e-TeX V 2.0
+%% Peter Breitenlohner
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+
+
+\ifx\eTeXversion\@undefined
+ \PackageError{etex}
+ {This package may only be run using an\MessageBreak
+ etex in extended mode}
+ {Perhaps you forgot the `*' when making the format with (e)initex.%
+ }
+\fi
+
+\ifnum\eTeXversion<2
+ \PackageError{etex}
+ {This package requires e-TeX V 2}
+ {You are probably using the obsolete e-TeX V 1.%
+ }
+\fi
+
+\def\eTeX{%
+ $\m@th\varepsilon$-\TeX}
+
+\def\tracingall{%
+ \tracingcommands\thr@@ % etex
+ \tracingstats\tw@
+ \tracingpages\@ne
+ \tracinglostchars\tw@ % etex
+ \tracingmacros\tw@
+ \tracingparagraphs\@ne
+ \tracingrestores\@ne
+ \tracinggroups\@ne % etex
+ \tracingifs\@ne % etex
+ \tracingscantokens\@ne % etex
+ \tracingnesting\@ne % etex
+ \tracingassigns\@ne % etex
+ \errorcontextlines\maxdimen
+ \showoutput}
+
+\def\loggingall{%
+ \tracingall
+ \tracingonline\z@}
+
+\def\tracingnone{%
+ \tracingonline\z@
+ \showboxdepth\m@ne
+ \showboxbreadth\m@ne
+ \tracingoutput\z@
+ \errorcontextlines\m@ne
+ \tracingassigns\z@
+ \tracingnesting\z@
+ \tracingscantokens\z@
+ \tracingifs\z@
+ \tracinggroups\z@
+ \tracingrestores\z@
+ \tracingparagraphs\z@
+ \tracingmacros\z@
+ \tracinglostchars\@ne
+ \tracingpages\z@
+ \tracingstats\z@
+ \tracingcommands\z@}
+
+%% Register allocation
+%% We have to adjust the Plain TeX / LaTeX register allocation counts
+%% for our slightly modified book-keeping, but first we allocate our
+%% insertion counter \et@xins, because \insc@ount of Plain TeX / LaTeX
+%% will be used differently.
+
+\newcount\et@xins
+
+\advance\count10 by 1 % \count10=23 % allocates \count registers 23, 24, ...
+\advance\count11 by 1 % \count11=10 % allocates \dimen registers 10, 11, ...
+\advance\count12 by 1 % \count12=10 % allocates \skip registers 10, 11, ...
+\advance\count13 by 1 % \count13=10 % allocates \muskip registers 10, 11, ...
+\advance\count14 by 1 % \count14=10 % allocates \box registers 10, 11, ...
+\advance\count15 by 1 % \count15=10 % allocates \toks registers 10, 11, ...
+\advance\count16 by 1 % \count16=0 % allocates input streams 0, 1, ...
+\advance\count17 by 1 % \count17=0 % allocates output streams 0, 1, ...
+\advance\count18 by 1 % \count18=4 % allocates math families 4, 5, ...
+\advance\count19 by 1 % \count19=0 % allocates \language codes 0, 1, ...
+
+\et@xins=\insc@unt % \et@xins=255 % allocates insertions 254, 253, ...
+
+%% We don't change the LaTeX definitions of \newcount, etc., but the
+%% \alloc@ macro doing the actual work is redefined.
+
+%% When the normal register pool for \count, \dimen, \skip, \muskip,
+%% \box, or \toks registers is exhausted, we switch to the extended pool.
+
+\def\alloc@#1#2#3#4#5%
+ {\ifnum\count1#1<#4% make sure there's still room
+ \allocationnumber\count1#1
+ \global\advance\count1#1\@ne
+ \global#3#5\allocationnumber
+ \wlog{\string#5=\string#2\the\allocationnumber}%
+ \else\ifnum#1<6
+ \begingroup \escapechar\m@ne
+ \expandafter\alloc@@\expandafter{\string#2}#5%
+ \else\errmessage{No room for a new #2}\fi\fi
+ }
+
+%% The \expandafter construction used here allows the generation of
+%% \newcount and \globcount from #1=count.
+
+\def\alloc@@#1#2%
+ {\endgroup % restore \escapechar
+ \wlog{Normal \csname#1\endcsname register pool exhausted,
+ switching to extended pool.}%
+ \global\expandafter\let
+ \csname new#1\expandafter\endcsname
+ \csname glob#1\endcsname
+ \csname new#1\endcsname#2%
+ }
+
+%% We do change the LaTeX definition of \newinsert
+
+\def\newinsert#1{% make sure there's still room for ...
+ \ch@ck0\et@xins\count{% ... a \count, ...
+ \ch@ck1\et@xins\dimen{% ... \dimen, ...
+ \ch@ck2\et@xins\skip{% ... \skip, ...
+ \ch@ck4\et@xins\box{% ... and \box register
+ \global\advance\et@xins\m@ne
+ \unless\ifnum\insc@unt<\et@xins \global\insc@unt\et@xins \fi
+ \allocationnumber\et@xins
+ \global\chardef#1\allocationnumber
+ \wlog{\string#1=\string\insert\the\allocationnumber}}}}}}
+
+\def\ch@ck#1#2#3#4%
+ {\ifnum\count1#1<#2#4\else\errmessage{No room for a new #3}\fi}
+
+%% And we define \reserveinserts, so that you can say \reserveinserts{17}
+%% in order to reserve room for up to 17 additional insertion classes, that
+%% will not be taken away by \newcount, \newdimen, \newskip, or \newbox.
+
+\outer\def \reserveinserts#1%
+ {\global\insc@unt\numexpr \et@xins \ifnum#1>\z@ -#1\fi \relax}
+
+% Now, we define \globcount, \globbox, etc., so that you can say
+% \globcount\foo and \foo will be defined (with \countdef) to be the
+% next count register from the vastly larger but somewhat less efficient
+% extended register pool. We also define \loccount, etc., but these
+% register definitions are local to the current group.
+
+\count260=277 % globally allocates \count registers 277, 278, ...
+\count261=256 % globally allocates \dimen registers 256, 257, ...
+\count262=256 % globally allocates \skip registers 256, 257, ...
+\count263=256 % globally allocates \muskip registers 256, 257, ...
+\count264=256 % globally allocates \box registers 256, 257, ...
+\count265=256 % globally allocates \toks registers 256, 257, ...
+\count266=1 % globally allocates \marks classes 1, 2, ...
+
+\count270=32768 % locally allocates \count registers 32767, 32766, ...
+\count271=32768 % ditto for \dimen registers
+\count272=32768 % ditto for \skip registers
+\count273=32768 % ditto for \muskip registers
+\count274=32768 % ditto for \box registers
+\count275=32768 % ditto for \toks registers
+\count276=32768 % ditto for \marks classes
+
+% \count registers 256-259 and 267-269 are not (yet) used
+
+% \def \et@xglob #1#2#3#4% <offset>, <type>, <method>, <register>
+% \def \et@xloc #1#2#3#4% <offset>, <type>, <method>, <register>
+
+\def \globcount {\et@xglob 0\count \countdef}
+\def \loccount {\et@xloc 0\count \countdef}
+\def \globdimen {\et@xglob 1\dimen \dimendef}
+\def \locdimen {\et@xloc 1\dimen \dimendef}
+\def \globskip {\et@xglob 2\skip \skipdef}
+\def \locskip {\et@xloc 2\skip \skipdef}
+\def \globmuskip {\et@xglob 3\muskip \muskipdef}
+\def \locmuskip {\et@xloc 3\muskip \muskipdef}
+\def \globbox {\et@xglob 4\box \mathchardef}
+\def \locbox {\et@xloc 4\box \mathchardef}
+\def \globtoks {\et@xglob 5\toks \toksdef}
+\def \loctoks {\et@xloc 5\toks \toksdef}
+\def \globmarks {\et@xglob 6\marks \mathchardef}
+\def \locmarks {\et@xloc 6\marks \mathchardef}
+
+\let\newmarks=\globmarks %% this used to be \newmark for e-TeX V 1.1
+
+\def\et@xglob#1#2#3#4%
+ {\et@xchk#1#2{% make sure there's still room
+ \allocationnumber=\count26#1%
+ \global\advance\count26#1\@ne
+ \global#3#4\allocationnumber
+ \wlog{\string#4=\string#2\the\allocationnumber}}%
+ }
+
+\def\et@xloc#1#2#3#4%
+ {\et@xchk#1#2{% make sure there's still room
+ \advance\count27#1by\m@ne
+ \allocationnumber=\count27#1%
+ #3#4=\allocationnumber
+ \et@xwlog{\string#4=\string#2\the\allocationnumber\space(local)}}%
+ }
+
+%% The allocation messages for local allocations use \et@xwlog, such that
+%% these messages can easily be switched on/off
+
+\let\et@xwlog=\wlog
+
+\def\et@xchk#1#2#3%
+ {\ifnum\count26#1<\count27#1 #3\else\errmessage{No room for a new #2}\fi}
+
+% Next we define \globcountblk, \loccountblk, etc., so that you can
+% say \globcountblk\foo{17} and \foo will be defined (with \mathchardef)
+% as the first (the zeroth?) of a block of 17 consecutive registers.
+% Thus the user is intended to reference elements <\foo+0> to <\foo+n-1>,
+% where n is the length of the block allocated.
+
+% \def \et@xgblk #1#2#3#4% <offset>, <type>, <register>, <size>
+% \def \et@xlblk #1#2#3#4% <offset>, <type>, <register>, <size>
+
+\def\globcountblk {\et@xgblk 0\count }
+\def\loccountblk {\et@xlblk 0\count }
+\def\globdimenblk {\et@xgblk 1\dimen }
+\def\locdimenblk {\et@xlblk 1\dimen }
+\def\globskipblk {\et@xgblk 2\skip }
+\def\locskipblk {\et@xlblk 2\skip }
+\def\globmuskipblk {\et@xgblk 3\muskip }
+\def\locmuskipblk {\et@xlblk 3\muskip }
+\def\globboxblk {\et@xgblk 4\box }
+\def\locboxblk {\et@xlblk 4\box }
+\def\globtoksblk {\et@xgblk 5\toks }
+\def\loctoksblk {\et@xlblk 5\toks }
+\def\globmarksblk {\et@xgblk 6\marks }
+\def\locmarksblk {\et@xlblk 6\marks }
+
+% \def\et@xchkblk#1#1#3#4% <offset>, <type>, <size>, <action>
+
+\def\et@xgblk#1#2#3#4%
+ {\et@xchkblk#1#2{#4}% make sure there's still room
+ {\allocationnumber\count26#1%
+ \global\advance\count26#1by#4%
+ \global\mathchardef#3\allocationnumber
+ \wlog{\string#3=\string#2blk{\number#4} at
+ \the\allocationnumber}%
+ }%
+ }
+
+\def\et@xlblk#1#2#3#4%
+ {\et@xchkblk#1#2{#4}% make sure there's still room
+ {\advance\count27#1-#4%
+ \allocationnumber\count27#1%
+ \mathchardef#3\allocationnumber
+ \et@xwlog{\string#3=\string#2blk{\number#4} at
+ \the\allocationnumber\space(local)}%
+ }%
+ }
+
+\def\et@xchkblk#1#2#3#4%
+ {\ifnum#3<\z@
+ \errmessage{Negative register block size \number#3}%
+ \else\ifnum\numexpr\count26#1+#3>\count27#1%
+ \errmessage{No room for new #2block of size \number#3}%
+ \else #4\fi \fi
+ }
+
+\catcode`\G=14
+\catcode`\I=14
+\catcode`\N=14
+\catcode`\C=14
+
+\ProcessOptions
+
+%% Declare names for `grouptypes'
+
+G \chardef \bottomleveltype = 0 % for the outside world
+G \chardef \simplegrouptype = 1 % for local structure only
+G \chardef \hboxgrouptype = 2 % for `\hbox{}'
+G \chardef \adjustedhboxgrouptype = 3 % for `\hbox{}' in vertical mode
+G \chardef \vboxgrouptype = 4 % for `\vbox{}'
+G \chardef \vtopgrouptype = 5 % for `\vtop{}'
+G \chardef \aligngrouptype = 6 % for `\halign{}', `\valign{}'
+G \chardef \noaligngrouptype = 7 % for `\noalign{}'
+G \chardef \outputgrouptype = 8 % for output routine
+G \chardef \mathgrouptype = 9 % for, e.g, `^{}'
+G \chardef \discgrouptype = 10 % for `\discretionary{}{}{}'
+G \chardef \insertgrouptype = 11 % for `\insert{}', `\vadjust{}'
+G \chardef \vcentergrouptype = 12 % for `\vcenter{}'
+G \chardef \mathchoicegrouptype = 13 % for `\mathchoice{}{}{}{}'
+G \chardef \semisimplegrouptype = 14 % for `\begingroup...\endgroup'
+G \chardef \mathshiftgrouptype = 15 % for `$...$'
+G \chardef \mathleftgrouptype = 16 % for `\left...\right'
+
+%% Declare names for `interactionmodes'
+
+I \chardef \batchinteractionmode = 0 % omits all stops and omits terminal output
+I \chardef \nonstopinteractionmode = 1 % omits all stops
+I \chardef \scrollinteractionmode = 2 % omits error stops
+I \chardef \errorstopinteractionmode = 3 % stops at every opportunity to interact
+
+%% Declare names for `nodetypes'
+
+N \chardef \charnode = 0 % character nodes
+N \chardef \hlistnode = 1 % hlist nodes
+N \chardef \vlistnode = 2 % vlist nodes
+N \chardef \rulenode = 3 % rule nodes
+N \chardef \insnode = 4 % insertion nodes
+N \chardef \marknode = 5 % a mark node
+N \chardef \adjustnode = 6 % an adjust node
+N \chardef \ligaturenode = 7 % a ligature node
+N \chardef \discnode = 8 % a discretionary node
+N \chardef \whatsitnode = 9 % special extension nodes
+N \chardef \mathnode = 10 % a math node
+N \chardef \gluenode = 11 % node that points to a glue specification
+N \chardef \kernnode = 12 % a kern node
+N \chardef \penaltynode = 13 % a penalty node
+N \chardef \unsetnode = 14 % an unset node
+N \chardef \mathsnodes = 15 % nodes that occur only in maths mode
+
+%% Declare names for `iftypes'
+
+C \chardef \charif = 1 % \if
+C \chardef \catif = 2 % \ifcat
+C \chardef \numif = 3 % \ifnum
+C \chardef \dimif = 4 % \ifdim
+C \chardef \oddif = 5 % \ifodd
+C \chardef \vmodeif = 6 % \ifvmode
+C \chardef \hmodeif = 7 % \ifhmode
+C \chardef \mmodeif = 8 % \ifmmode
+C \chardef \innerif = 9 % \ifinner
+C \chardef \voidif = 10 % \ifvoid
+C \chardef \hboxif = 11 % \ifhbox
+C \chardef \vboxif = 12 % \ifvbox
+C \chardef \xif = 13 % \ifx
+C \chardef \eofif = 14 % \ifeof
+C \chardef \trueif = 15 % \iftrue
+C \chardef \falseif = 16 % \iffalse
+C \chardef \caseif = 17 % \ifcase
+C \chardef \definedif = 18 % \ifdefined
+C \chardef \csnameif = 19 % \ifcsname
+C \chardef \fontcharif = 20 % \iffontchar
+
+\catcode`\G=11
+\catcode`\I=11
+\catcode`\N=11
+\catcode`\C=11
+