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\ifx\undefined\unprotect \catcode`\@=11 \fi
%D Constants to be used with \type {\grouptype}.
\chardef\@@bottomlevelgroup = 0
\chardef\@@simplegroup = 1
\chardef\@@hboxgroup = 2
\chardef\@@adjustedhboxgroup = 3
\chardef\@@vboxgroup = 4
\chardef\@@vtopgroup = 5
\chardef\@@aligngroup = 6
\chardef\@@noaligngroup = 7
\chardef\@@outputgroup = 8
\chardef\@@mathgroup = 9
\chardef\@@discretionarygroup = 10
\chardef\@@insertgroup = 11
\chardef\@@vcentergroup = 12
\chardef\@@mathchoicegroup = 13
\chardef\@@semisimplegroup = 14
\chardef\@@mathshiftgroup = 15
\chardef\@@mathleftgroup = 16
\chardef\@@vadjustgroup = \@@insertgroup
%D Constants to be used with \type {\interactionmode}.
\chardef\@@batchmode = 0
\chardef\@@nonstopmode = 1
\chardef\@@scrollmode = 2
\chardef\@@errorstopmode = 3
%D Constants to be used with \type {\nodetype}.
\chardef\@@charnode = 0
\chardef\@@hlistnode = 1
\chardef\@@vlistnode = 2
\chardef\@@rulenode = 3
\chardef\@@insertnode = 4
\chardef\@@marknode = 5
\chardef\@@adjustnode = 6
\chardef\@@ligaturenode = 7
\chardef\@@discretionarynode = 8
\chardef\@@whatsitnode = 9
\chardef\@@mathnode = 10
\chardef\@@gluenode = 11
\chardef\@@kernnode = 12
\chardef\@@penaltynode = 13
\chardef\@@unsetnode = 14
\chardef\@@mathsnode = 15
%D Constants to be used with \type {\iftype}.
\chardef\@@charif = 1
\chardef\@@catif = 2
\chardef\@@numif = 3
\chardef\@@dimif = 4
\chardef\@@oddif = 5
\chardef\@@vmodeif = 6
\chardef\@@hmodeif = 7
\chardef\@@mmodeif = 8
\chardef\@@innerif = 9
\chardef\@@voidif = 10
\chardef\@@hboxif = 11
\chardef\@@vboxif = 12
\chardef\@@xif = 13
\chardef\@@eofif = 14
\chardef\@@trueif = 15
\chardef\@@falseif = 16
\chardef\@@caseif = 17
\chardef\@@definedif = 18
\chardef\@@csnameif = 19
\chardef\@@fontcharif = 20
%D Just in case we are not using \ETEX, we define some out of
%D range constants.
\beginTEX
\chardef\grouptype = 255
\chardef\interactionmode = 255
\chardef\nodetype = 255
\chardef\iftype = 255
\endTEX
%D Of course we want even bigger log files, so we copied this
%D from the \ETEX\ source files.
\beginETEX \tracing...
\def\tracingall%
{\tracingonline =\@ne
\tracingcommands =\thr@@
\tracingstats =\tw@
\tracingpages =\@ne
\tracingoutput =\@ne
\tracinglostchars =\tw@
\tracingmacros =\tw@
\tracingparagraphs=\@ne
\tracingrestores =\@ne
\showboxbreadth =\maxdimen
\showboxdepth =\maxdimen
\tracinggroups =\@ne
\tracingifs =\@ne
\tracingscantokens=\@ne
\tracingnesting =\@ne
\tracingassigns =\tw@
\errorstopmode}
\def\loggingall%
{\tracingall
\tracingonline=\z@}
\def\tracingnone%
{\tracingassigns =\z@
\tracingnesting =\z@
\tracingscantokens=\z@
\tracingifs =\z@
\tracinggroups =\z@
\showboxdepth =\thr@@
\showboxbreadth =5
\tracingrestores =\z@
\tracingparagraphs=\z@
\tracingmacros =\z@
\tracinglostchars =\@ne
\tracingoutput =\z@
\tracingpages =\z@
\tracingstats =\z@
\tracingcommands =\z@
\tracingonline =\z@ }
\endETEX
%D Just to be sure:
\ifx\eTeX\undefined
\def\eTeX{$\varepsilon$-\TeX}
\fi
%D In \ETEX\ we have lots of registers, so we redefine a few
%D low level macros. We reserve some extra space for inserts
%D and as soon as we near the end of the first register
%D memory bank (often some 10 less than 255), we switch to the
%D slower range \type {\@@medallocation}||\type {\@@maxallocation}.
\beginETEX \new...
%D First we redefine the plain \TEX\ register allocation macros.
\def\newcount {\myalloc@0\count \countdef \@@maxallocation}
\def\newdimen {\myalloc@1\dimen \dimendef \@@maxallocation}
\def\newskip {\myalloc@2\skip \skipdef \@@maxallocation}
\def\newmuskip {\myalloc@3\muskip \muskipdef \@@maxallocation}
\def\newbox {\myalloc@4\box \mathchardef\@@maxallocation}
\def\newtoks {\myalloc@5\toks \toksdef \@@maxallocation}
\def\newread {\myalloc@6\read \chardef \@@minallocation}
\def\newwrite {\myalloc@7\write \chardef \@@minallocation}
\def\newmarks {\myalloc@8\marks \mathchardef\@@maxallocation}
\def\newlanguage{\myalloc@9\language\chardef \@@minallocation}
%D Since in \CONTEXT\ we only have one math family left we
%D redefine \type {\newfam}.
\def\newfam#1{\chardef#1=15 }
%D Therefore we should reset the related counter.
\count18=1
%D We use some constants in the tests.
\mathchardef\@@minallocation= 16
\mathchardef\@@medallocation= 256
\mathchardef\@@maxallocation=32767
%D I cannot imagine that more than~8 extra insert classes
%D are needed, so we say:
\chardef\@@insallocation=8
%D My low level allocation macro now comes down to:
\def\myalloc@#1#2#3#4#5%
{\global\advance\count1#1by\@ne
\ifnum\count1#1>\@@medallocation \else
\global\advance\insc@unt by -\@@insallocation
\ifnum\count1#1<\insc@unt \else
\global\count1#1=\@@medallocation % \wait
\fi
\global\advance\insc@unt by +\@@insallocation
\fi
\ifnum\count1#1>#4%
\global\count1#1=#4%
\errmessage{No room for (\string#2) \string#5}%
\fi
\allocationnumber=\count1#1%
\global#3#5=\allocationnumber
\wlog{\string#5=\string#2\the\allocationnumber}}
\endETEX
%D These macros can be checked by tests like:
%D
%D \starttypen
%D \let\wlog\message \dorecurse{1000}{\newcount\dummy}
%D \stoptypen
%D A few bonus bindings.
\let\normalprotected = \protected
\let\normalunexpanded = \unexpanded
\ifx\undefined\unprotect \catcode`\@=12 \fi \endinput
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