syst-ini.mkxl /size: 56 Kb    last modification: 2021-10-28 13:51
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%D \module
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%D [ file=syst-ini,
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%D version=2008.11.04, % 2001.11.16, % 1999.03.17, % an oldie: 1995.10.10
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%D title=\CONTEXT\ System Macros,
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%D subtitle=Bootstrapping \TEX,
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%D author=Hans Hagen,
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%D date=\currentdate,
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%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
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%C
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%C This module is part of the \CONTEXT\ macro||package and is
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%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
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%C details.
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%D We used to load plain \TEX\ in a special way, but redefining a couple of
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%D primitives so that for instance font loading was ignored. For those interested,
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%D this loader is found in \type {syst-tex.tex}. Some of the comment's are Don
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%D Knuths and more of it can be found in the plain \TEX\ format.
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%D
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%D Successive versions will be adapted to \LUAMETATEX. That also means that we
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%D define things a bit differently than in \MKII\ and \MKIV. This is party due to
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%D the fact that in this engine we removed some side effects or added features. The
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%D original \TEX\ program is well defined and documented and is still the benchmark.
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%D The \ETEX\ extensions originally were meant as systematic follow up but that
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%D never went beyond a first upgrade. It had a dual mode: compatible or extensible.
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%D We always used the second mode. The \LUATEX\ engines don't have that.
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%D
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%D There are some hard coded properties that relate to for instance node types but
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%D we always used abstraction. There are also side effects that (probably) originate
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%D in the fact that \ETEX\ had to stay compatible with the dominant set of macros
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%D using the original \TEX\ ones (either or not wrapped). Even unwanted side effects
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%D eventually become features. In\LUATEX\ and even more in \LUAMETATEX\ we get
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%D around that by additional mode variables that you can find below.
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%D
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%D Side note: those who complain about \TEX\ as rather special language, \ETEX\
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%D extensions that should have been or be different, should really look into how
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%D \TEX\ and friends evolved, and not come to quick and wrong conclusions. There are
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%D only a very few languages that evolve this way. As a comparison one can wonder
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%D why \CCODE\ never had proper strings like \PASCAL\ bit it's just hindsight and
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%D discussing it has no use. In a similar fashion one should keep in mind that what
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%D you see here is just a logical follow up in \MKII\ where we had to bend the rules
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%D and \MKIV\ where we had a bit more available. Not many who look at the latest
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%D engines had to jump though all the hoops.
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%D
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%D This is for instance noticeable in the names of some primitvies: \CONTEXT\ has a
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%D concept of protection before \type {\protected} showed up, and similarly had
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%D expansion helpers. This is why in \MKII\ you find \type {\protected}, \type
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%D {\expanded}, and \type {\unexpanded} commands with different meanings than the
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%D later \ETEX\ primitives. In \MKIV\ we stuck to the \CONTEXT\ originals and use
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%D \type {\normal...} ones when needed (so \type {\normal...} is there for a
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%D reason!). In \LMTX\ we made the transition from \type {\unexpanded} to \type
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%D {\protected} so again this file looks different than the \MKIV\ ancestor.
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%D
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%D When primitives get initialized they come from the \TEX\ namespace (the
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%D originals), the \ETEX\ extensions (although we dropped some) and \LUATEX\ which
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%D includes the \LUAMETATEX\ ones. The most noticeable \ETEX\ extensions we kept are
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%D those that relate to expansion and the expression scanners. The last group has
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%D always been somewhat special because (we were told) it was modelled after a macro
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%D set so it had to be compatible. It is tempting to replace it (and eventually I
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%D might do that) but for now we stick to them (although with an integer divide
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%D extension (like the \LUA\ \type {//} and the source has commented binary
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%D operators but I haven't yet decided on the symbols to use because we need to
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%D avoid expansion issues). For the record: the more extensive, related to \ETEX\
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%D follow up \NTS\ never took of, probably because of the implementation language
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%D and because performance made it unuseable. This is also why \LUATEX\ took a
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%D different route: extending by an extension language. Of course in the end some
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%D core functionality got added too.
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%D
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%D The most noticeable \LUAMETATEX\ specific code here has to do with additional
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%D data types (integer and dimension constants) and macro argument extensions. We
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%D also set up some defaults in handling math, languages, etc. Elsewhere in the
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%D \CONTEXT\ source the real configuration and usage happens so don't consider this
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%D an tutorial (as the plain format is).
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%D
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%D Category codes are another areas where subtle changed happened. You might not
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%D grasp it (maybe because \CONTEXT\ is alien to you) but whenever you see something
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%D that looks weird keep in mind that there is a valid reason for it.
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%D
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%D In due time I will add some more comments here, also because some \CONTEXT\
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%D users might be interested in the hostiry. Now to the code!
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%D Characters can have special states, that can be triggered by setting their
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%D category coded. Some are preset, others are to be set as soon as possible,
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%D otherwise we cannot define any useful macros.
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%D
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%D First we define a bunch of constants. Normally we would \type {\setconstant}
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%D but we're prestine and have no macros defined yet. Abstraction also makes it
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%D possible to avoid the \type {^^} in the input. We no longer define the \ETEX\
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%D nodes here (we have not only more, but also different numbers) so we do it
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%D elsewhere.
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% cheatsheet
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%
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% # : 0--9
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% * : ignore spaces
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% + : keep the braces
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% - : discard and don't count the argument
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% . : ignore pars and spaces
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% , : push back space when no match
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% / : remove leading and trailing spaces and pars
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% : : pick up scanning here
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% ; : quit scanning
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% = : braces are mandate
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% ^ : keep leading spaces
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% _ : braces are mandate and kept
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\immutable
\integerdef
\escapecatcode
0
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\immutable
\integerdef
\begingroupcatcode
1
108
\immutable
\integerdef
\endgroupcatcode
2
109
\immutable
\integerdef
\mathshiftcatcode
3
110
\immutable
\integerdef
\alignmentcatcode
4
111
\immutable
\integerdef
\endoflinecatcode
5
112
\immutable
\integerdef
\parametercatcode
6
113
\immutable
\integerdef
\superscriptcatcode
7
114
\immutable
\integerdef
\subscriptcatcode
8
115
\immutable
\integerdef
\ignorecatcode
9
116
\immutable
\integerdef
\spacecatcode
1
0
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\immutable
\integerdef
\lettercatcode
1
1
118
\immutable
\integerdef
\othercatcode
1
2
% finally obsolete: \let\other \othercatcode
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\immutable
\integerdef
\activecatcode
1
3
% finally obsolete: \let\active\activecatcode
120
\immutable
\integerdef
\commentcatcode
1
4
121
\immutable
\integerdef
\invalidcatcode
1
5
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%immutable\integerdef\zeroasciicode 0
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\immutable
\integerdef
\tabasciicode
9
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\immutable
\integerdef
\newlineasciicode
1
0
% don't confuse this one with \endoflineasciicode
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\immutable
\integerdef
\formfeedasciicode
1
2
127
\immutable
\integerdef
\endoflineasciicode
1
3
% somewhat messy but this can be the active \par
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\immutable
\integerdef
\endoffileasciicode
2
6
129
\immutable
\integerdef
\spaceasciicode
3
2
130
\immutable
\integerdef
\exclamationmarkasciicode
3
3
% ! used in namespace protection
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\immutable
\integerdef
\doublequoteasciicode
3
4
% "
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\immutable
\integerdef
\hashasciicode
3
5
133
\immutable
\integerdef
\dollarasciicode
3
6
134
\immutable
\integerdef
\commentasciicode
3
7
135
\immutable
\integerdef
\ampersandasciicode
3
8
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\immutable
\integerdef
\singlequoteasciicode
3
9
% '
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\immutable
\integerdef
\primeasciicode
3
9
% '
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\immutable
\integerdef
\leftparentasciicode
4
0
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\immutable
\integerdef
\rightparentasciicode
4
1
140
\immutable
\integerdef
\commaasciicode
4
4
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\immutable
\integerdef
\hyphenasciicode
4
5
142
\immutable
\integerdef
\periodasciicode
4
6
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\immutable
\integerdef
\forwardslashasciicode
4
7
% /
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\immutable
\integerdef
\colonasciicode
5
8
145
\immutable
\integerdef
\lessthanasciicode
6
0
% < used as alternative verbatim {
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\immutable
\integerdef
\morethanasciicode
6
2
% > used as alternative verbatim }
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\immutable
\integerdef
\questionmarkasciicode
6
3
% ? used in namespace protection
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\immutable
\integerdef
\atsignasciicode
6
4
% @ used in namespace protection
149
\immutable
\integerdef
\leftbracketasciicode
9
1
150
\immutable
\integerdef
\backslashasciicode
9
2
% `\\
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\immutable
\integerdef
\rightbracketasciicode
9
3
152
\immutable
\integerdef
\circumflexasciicode
9
4
153
\immutable
\integerdef
\underscoreasciicode
9
5
154
\immutable
\integerdef
\leftbraceasciicode
1
2
3
% `\{
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\immutable
\integerdef
\barasciicode
1
2
4
% `\|
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\immutable
\integerdef
\rightbraceasciicode
1
2
5
% `\}
157
\immutable
\integerdef
\tildeasciicode
1
2
6
% `\~
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\immutable
\integerdef
\delasciicode
1
2
7
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\aliased
\let
\percentasciicode
\commentasciicode
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%catcode\zeroasciicode \ignorecatcode % `\^^@ ascii null is ignored
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\catcode
\tabasciicode
\spacecatcode
% `\^^I ascii tab is a blank space
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\catcode
\formfeedasciicode
\activecatcode
% `\^^L ascii form-feed (active, set later)
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%catcode\endoflineasciicode \endoflinecatcode % `\^^M ascii return is end-line
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\catcode
\endoffileasciicode
\ignorecatcode
% `\^^Z endoffile (ignored in ConTeXt)
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%catcode\spaceasciicode \spacecatcode % `\ ascii space is blank space
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\catcode
\hashasciicode
\parametercatcode
% `\# hash mark is macro parameter character
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\catcode
\dollarasciicode
\mathshiftcatcode
% `\$ dollar sign is math shift
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%catcode\commentasciicode \commentcatcode % `\% percent sign is comment character
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\catcode
\ampersandasciicode
\alignmentcatcode
% `\& ampersand is alignment tab
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%catcode\backslashasciicode \escapecatcode % `\\ backslash is TeX escape character
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\catcode
\circumflexasciicode
\superscriptcatcode
% `\^ circumflex and uparrow are for superscripts
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\catcode
\underscoreasciicode
\subscriptcatcode
% `\_ underline and downarrow are for subscripts
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\catcode
\leftbraceasciicode
\begingroupcatcode
% `\{ left brace is begin-group character
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\catcode
\rightbraceasciicode
\endgroupcatcode
% `\} right brace is end-group character
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\catcode
\tildeasciicode
\activecatcode
% `\~ tilde is active
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%catcode\delasciicode \invalidcatcode % `\^^? ascii delete is invalid
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%D First we need to initialization the primitives. Because \CONTEXT\ is already a
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%D pretty old macro package, we have a couple of issues with respect to primitives.
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%D The \ETEX\ engine added a few as did \PDFTEX. The \LUATEX\ engine added even
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%D more. This means that there can be a potential clash between primitives and
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%D existing macros. The most noticeable ones are:
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%D
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%D \starttyping
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%D \protected
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%D \expanded
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%D \unexpanded
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%D \stoptyping
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%D
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%D Because we had macros like that before the primitives showed up. The protection
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%D related macros were there before we even knew about extensions to the engine.
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%D When the expansion related ones were introduced, we originally came up with
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%D different names but due to requests we used the current names, somethng that in
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%D retrospect was a bad idea: they should have gotten different names in \LUATEX, if
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%D only because at that time only \CONTEXT\ was using them in rolling releases.
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%D Anyway, we're now stuck with this situation, and it means that one should use the
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%D \type {\normal...} variants in low level code:
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%D
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%D \starttyping
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%D \normalexpanded
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%D \normalprotected
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%D \normalunexpanded
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%D \stoptyping
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%D
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%D In the end not using different names in \LUATEX\ for these kind of backfires. It
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%D makes not much sense to fix this in \LUAMETATEX\ because we're now to long on the
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%D road. It is actually the reason why we have the option in \LUATEX\ to alias all
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%D primitives in one go using a prefix. Actually this trick could be used to recover
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%D a primitive meaning: just enable it with some prefix and \type {\let} the
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%D original to that. But \unknown\ we prevent that trick below.
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%D
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%D The code below differs from \LUATEX: in \LUAMETATEX\ all primitives are already
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%D available; it cannot limit itself to being \TEX\ or \ETEX. It could not do that
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%D anyway because there are differences (no backend, to mention one).
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\directlua {
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tex
.
enableprimitives
(
"
normal
"
,
true
)
% we default to everything
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function
tex
.
enableprimitives
(
)
end
% so we kind of protect what's there
221
}
222 223
\untraced
\permanent
\let
\undefined
\undefined
224 225
\immutable
\def
\space
{
}
226
\immutable
\def
\empty
{
}
227
\mutable
\def
\temp
{
}
228 229
\immutable
\letcharcode
\formfeedasciicode
\par
% \def ^^L{\par} formfeed
230
\immutable
\letcharcode
\tildeasciicode
\
% tilde
231
\immutable
\letcharcode
\spaceasciicode
\space
% space
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\immutable
\defcsname
\Uchar
\tabasciicode
\endcsname
{
\
}
% \def\^^I{\ } tab
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\immutable
\defcsname
\Uchar
\formfeedasciicode
\endcsname
{
\par
}
% \def\^^L{\par} formfeed
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\immutable
\defcsname
\Uchar
\endoflineasciicode
\endcsname
{
\
}
% \def\^^M{\ } return
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%D For now:
238 239
\permanent
\def
\gobbleoneargument
#
-
{
}
% will be defined later on anyway
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%D First we define a simplified version of the \CONTEXT\ protection mechanism. Later
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%D we will implement a better variant.
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\def
\unprotect
245
{
\edef
\protect
246
{
\catcode
\atsignasciicode
\the
\catcode
\atsignasciicode
\relax
247
\catcode
\exclamationmarkasciicode
\the
\catcode
\exclamationmarkasciicode
\relax
248
\catcode
\questionmarkasciicode
\the
\catcode
\questionmarkasciicode
\relax
249
\catcode
\underscoreasciicode
\the
\catcode
\underscoreasciicode
\relax
250
\let
\protect
\relax
}
%
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\catcode
\atsignasciicode
\lettercatcode
252
\catcode
\exclamationmarkasciicode
\lettercatcode
253
\catcode
\questionmarkasciicode
\lettercatcode
254
\catcode
\underscoreasciicode
\lettercatcode
}
255 256
\let
\protect
\relax
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\unprotect
259 260
%D Some pretty important definitions:
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\immutable
\let
\bgroup
=
{
263
\immutable
\let
\egroup
=
}
264 265
%D \macros
266
%D {normalbgroup,normalgroup}
267
%D
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%D No comment.
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%D Allocation of registers is done slightly different than in plain \TEX. First of
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%D all we use different reserved counters. We also don't implement a family handler
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%D because users are not supposed to implement their own math. We reserve the lowest
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%D 31 registers for scratch purposes. Keep in mind that in the core engine some
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%D registers are reserved: counters 0 upto 9, and counter 255.
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%D
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%D As with plain \TEX\ we recommend that macro designers always use \type {\global}
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%D assignments with respect to registers numbered 1, 3, 5 \unknown\ 31, and always
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%D non||\type {\global} assignments with respect to registers 0, 2, 4, \unknown\ 30.
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%D This will prevent \quote {save stack buildup} that might otherwise occur.
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%D
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%D We reserve some registers for special (management) purposes. In the mkiv file you
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%D can see how we also (even if we don't use it) deal with families and languages
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%D and distinguish read and write ranges. There we also use a more traditional
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%D insert allocator that operates in its own range. In \MKIV\ the ranges are:
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% 0 - 20 : scratch
287
% 21 - 127 : internal
288
% 128 - 254 : inserts (no longer)
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% 255 : page
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% 256 - : user defined
291 292
%D However, in \LMTX\ we have:
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% 0 - 199 : scratch
295
% 200 - 254 : internal
296
% 255 : page
297
% 256 - : user defined
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%D Later on, the \type {\c_syst_max_allocated_register} variable will be halfed so
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%D that while local allocators will use the 22* range. So we have plenty of room
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%D reserved for more private ones.
302 303
\permanent
\countdef
\c_syst_min_allocated_register
=
2
0
1
\c_syst_min_allocated_register
=
2
5
6
% can change
304
\permanent
\countdef
\c_syst_max_allocated_register
=
2
0
2
\c_syst_max_allocated_register
=
6
5
5
3
5
% is adapted later on
305
\permanent
\countdef
\c_syst_min_allocated_iohandle
=
2
0
3
\c_syst_min_allocated_iohandle
=
0
306
\permanent
\countdef
\c_syst_max_allocated_iohandle
=
2
0
4
\c_syst_max_allocated_iohandle
=
1
0
2
3
307
\permanent
\countdef
\c_syst_min_allocated_attribute
=
2
0
5
\c_syst_min_allocated_attribute
=
1
0
2
4
% 0-1023 : private
308
\permanent
\countdef
\c_syst_min_allocated_mark
=
2
0
6
\c_syst_min_allocated_mark
=
1
6
% a few scratch ones
309
\permanent
\countdef
\c_syst_max_allocated_mark
=
2
0
7
\c_syst_max_allocated_mark
=
1
0
2
4
% max 10K in luametatex anyway
310 311
\permanent
\countdef
\c_syst_last_allocated_count
=
2
1
1
\c_syst_last_allocated_count
=
\c_syst_min_allocated_register
312
\permanent
\countdef
\c_syst_last_allocated_dimen
=
2
1
2
\c_syst_last_allocated_dimen
=
\c_syst_min_allocated_register
313
\permanent
\countdef
\c_syst_last_allocated_skip
=
2
1
3
\c_syst_last_allocated_skip
=
\c_syst_min_allocated_register
314
\permanent
\countdef
\c_syst_last_allocated_muskip
=
2
1
4
\c_syst_last_allocated_muskip
=
\c_syst_min_allocated_register
315
\permanent
\countdef
\c_syst_last_allocated_box
=
2
1
5
\c_syst_last_allocated_box
=
\c_syst_min_allocated_register
316
\permanent
\countdef
\c_syst_last_allocated_toks
=
2
1
6
\c_syst_last_allocated_toks
=
\c_syst_min_allocated_register
317
\permanent
\countdef
\c_syst_last_allocated_read
=
2
1
7
\c_syst_last_allocated_read
=
\c_syst_min_allocated_iohandle
318
\permanent
\countdef
\c_syst_last_allocated_write
=
2
1
8
\c_syst_last_allocated_write
=
\c_syst_min_allocated_iohandle
319
\permanent
\countdef
\c_syst_last_allocated_marks
=
2
1
9
\c_syst_last_allocated_marks
=
\c_syst_min_allocated_mark
320 321
\permanent
\countdef
\c_syst_min_counter_value
=
2
5
3
\c_syst_min_counter_value
=
-
"
7
FFFFFFF
322
\permanent
\countdef
\c_syst_max_counter_value
=
2
5
4
\c_syst_max_counter_value
=
"
7
FFFFFFF
323 324
\immutable
\integerdef
\zerocount
0
325
\immutable
\integerdef
\plusone
1
326
\immutable
\integerdef
\minusone
-
1
327 328
\immutable
\integerdef
\normalpagebox
2
5
5
% hardcoded in pdftex/xetex
329 330
\immutable
\integerdef
\statuswrite
\minusone
331 332
%D So, effectively we start allocating from 256 and upwards. The inserts sit in the
333
%D range 128 upto 254. Page numbers use the counters 0 upto 9 and the pagebox is
334
%D 255. Users can use the scratch registers upto 31 without problem but all others
335
%D are reserved.
336 337
\permanent
\let
\wlog
\gobbleoneargument
% Let's get rid of this one.
338 339
%D The allocators share a common helper macro. Marks might be changed to work in lower
340
%D regions and we always assumes allocation.
341 342
\permanent
\protected
\def
\newcount
{
\syst_basics_allocate
\c_syst_last_allocated_count
\count
\countdef
\c_syst_max_allocated_register
}
343
\permanent
\protected
\def
\newdimen
{
\syst_basics_allocate
\c_syst_last_allocated_dimen
\dimen
\dimendef
\c_syst_max_allocated_register
}
344
\permanent
\protected
\def
\newskip
{
\syst_basics_allocate
\c_syst_last_allocated_skip
\skip
\skipdef
\c_syst_max_allocated_register
}
345
\permanent
\protected
\def
\newmuskip
{
\syst_basics_allocate
\c_syst_last_allocated_muskip
\muskip
\muskipdef
\c_syst_max_allocated_register
}
346
\permanent
\protected
\def
\newbox
{
\syst_basics_allocate
\c_syst_last_allocated_box
\box
\integerdef
\c_syst_max_allocated_register
}
347
\permanent
\protected
\def
\newtoks
{
\syst_basics_allocate
\c_syst_last_allocated_toks
\toks
\toksdef
\c_syst_max_allocated_register
}
348
\permanent
\protected
\def
\newread
{
\syst_basics_allocate
\c_syst_last_allocated_read
\read
\integerdef
\c_syst_max_allocated_iohandle
}
349
\permanent
\protected
\def
\newwrite
{
\syst_basics_allocate
\c_syst_last_allocated_write
\write
\integerdef
\c_syst_max_allocated_iohandle
}
350
\permanent
\protected
\def
\newmarks
{
\syst_basics_allocate
\c_syst_last_allocated_marks
\marks
\integerdef
\c_syst_max_allocated_mark
}
351 352
\firstvalidlanguage
\plusone
% so zero is ignored in hyphenation, this might become the default
353 354
%D Watch out, for the moment we disable the check for already being defined later we
355
%D will revert this but first all chardefs must be replaced.
356 357
\permanent
\protected
\def
\setconstant
{
}
358
\permanent
\protected
\def
\setconstantvalue
#
1
#
2
{
\csname
#
1
\endcsname
\numexpr
#
2
\relax
}
359 360
\permanent
\protected
\def
\newconstant
#
1
%
361
{
\ifrelax
#
1
%
362
%\writestatus{!!!!!!!!!!}{\string #1 => RELAX}%
363
\unletfrozen
#
1
%
364
\newcount
#
1
%
365
\orelse
\ifdefined
#
1
%
366
%\writestatus{!!!!!!!!!!}{\string #1 => DEFINED}%
367
\else
368
\newcount
#
1
%
369
\fi
}
370 371
\permanent
\protected
\def
\setnewconstant
#
1
{
\newconstant
#
1
#
1
}
372 373
% %D The next definitions are really needed (in \CONTEXT):
374 375
\newlinechar
\newlineasciicode
\permanent
\edef
\outputnewlinechar
{
\Uchar
\newlineasciicode
}
% {^^J}
376 377
%D One reason to start high with allocation is that it permits us to allocate
378
%D consecutive ranges more easily, for instance if for \MPLIB\ we want to allocate a
379
%D continuous range of boxes. It also permits us to do a proper upward allocation
380
%D for inserts. The current code evolved from code that dealt with older engines but
381
%D as all engines now provide many registers we removed all traces. If you ever run
382
%D into the \MKII\ \type {mptopdf} code, you'll notice that some register magic was
383
%D needed to fit into existing macro packages. The same is true for \PICTEX\ that we
384
%D used in (gheneric) \PPCHTEX.
385 386
\ifdefined
\writestatus
\else
387
%\protected\def\writestatus#1#2{\immediate\write\statuswrite{#1: #2}}
388
\frozen
\protected
\def
\writestatus
#
1
#
2
{
\message
{
#
1
:
#
2
}
}
389
\fi
390 391
\def
\syst_basics_allocate_yes
#
1
#
2
#
3
#
4
#
5
% last class method max name
392
{
\ifnum
#
1
<
#
4
\relax
393
\global
\advance
#
1
\plusone
394
\permanent
\global
#
3
#
5
=
#
1
\relax
395
\else
396
\writestatus
{
warning
}
{
no
room
for
\string
#
2
\space
\string
#
5
\space
(
max
:
\number
#
4
)
}
%
397
\fi
}
398 399
\def
\syst_basics_allocate_nop
#
1
#
2
#
3
#
4
#
5
% last class method max name
400
{
\writestatus
{
warning
}
{
\string
#
2
\string
#
5
is
already
defined
(
\string
\relax
\space
it
first
)
}
}
401 402
\def
\syst_basics_allocate
#
1
#
2
#
3
#
4
#
5
% last class method max name
403
{
\ifrelax
#
5
%
404
\expandafter
\syst_basics_allocate_yes
405
\orelse
\ifdefined
#
5
%
406
\expandafter
\syst_basics_allocate_nop
407
\else
408
\expandafter
\syst_basics_allocate_yes
409
\fi
410
#
1
#
2
#
3
#
4
#
5
}
411 412
%D Since the number of chars exceed 256 now, we can use \type {\chardef} instead of
413
%D the more limited \type {\mathchardef}.
414 415
% \protected\def\newbox {\syst_basics_allocate\c_syst_last_allocated_box \box \chardef\c_syst_max_allocated_register}
416
% \protected\def\newmarks{\syst_basics_allocate\c_syst_last_allocated_marks\marks\chardef\c_syst_max_allocated_register}
417 418
%D Attributes are something very \LUATEX. In \CONTEXT\ you are not supposed to use
419
%D the attributes directly but always allocate then first. For instance attribute~0
420
%D is reserved for special purposes (this might change). Attributes in the range
421
%D 128-1023 are private and should not be touched.
422 423
\immutable
\integerdef
\attributeunsetvalue
\c_syst_min_counter_value
% used to be \minusone
424 425
% \permanent\protected\def\newattribute{\syst_basics_allocate\c_syst_last_allocated_attribute\attribute\attributedef\c_syst_max_allocated_register}
426 427
% %D Not used by \CONTEXT\ but for instance \PICTEX\ needs it. It's a trick to force
428
% %D strings instead of tokens that take more memory.
429
%
430
% \permanent\protected\def\newhelp#1#2{\newtoks#1#1\expandafter{\detokenize{#2}}}
431 432
%D \macros
433
%D {scratchcounter,
434
%D scratchdimen,scratchskip,scratchmuskip,
435
%D scratchbox,
436
%D scratchtoks}
437
%D
438
%D We now define a few scratch registers, so that successive loads at least have
439
%D some available. The private ones are used in cases where we don't want to
440
%D intrude on normal scratch ones.
441 442
\newcount
\scratchcounter
\newcount
\globalscratchcounter
\newcount
\privatescratchcounter
443
\newdimen
\scratchdimen
\newdimen
\globalscratchdimen
\newdimen
\privatescratchdimen
444
\newskip
\scratchskip
\newskip
\globalscratchskip
\newskip
\privatescratchskip
445
\newmuskip
\scratchmuskip
\newmuskip
\globalscratchmuskip
\newmuskip
\privatescratchmuskip
446
\newtoks
\scratchtoks
\newtoks
\globalscratchtoks
\newtoks
\privatescratchtoks
447
\newbox
\scratchbox
\newbox
\globalscratchbox
\newbox
\privatescratchbox
448 449
\newcount
\scratchcounterone
\newcount
\scratchcountertwo
\newcount
\scratchcounterthree
450
\newdimen
\scratchdimenone
\newdimen
\scratchdimentwo
\newdimen
\scratchdimenthree
451
\newskip
\scratchskipone
\newskip
\scratchskiptwo
\newskip
\scratchskipthree
452
\newmuskip
\scratchmuskipone
\newmuskip
\scratchmuskiptwo
\newmuskip
\scratchmuskipthree
453
\newtoks
\scratchtoksone
\newtoks
\scratchtokstwo
\newtoks
\scratchtoksthree
454
\newbox
\scratchboxone
\newbox
\scratchboxtwo
\newbox
\scratchboxthree
455 456
\newcount
\scratchcounterfour
\newcount
\scratchcounterfive
\newcount
\scratchcountersix
457
\newdimen
\scratchdimenfour
\newdimen
\scratchdimenfive
\newdimen
\scratchdimensix
458
\newskip
\scratchskipfour
\newskip
\scratchskipfive
\newskip
\scratchskipsix
459
\newmuskip
\scratchmuskipfour
\newmuskip
\scratchmuskipfive
\newmuskip
\scratchmuskipsix
460
\newtoks
\scratchtoksfour
\newtoks
\scratchtoksfive
\newtoks
\scratchtokssix
461
\newbox
\scratchboxfour
\newbox
\scratchboxfive
\newbox
\scratchboxsix
462 463
\newcount
\globalscratchcounterone
464
\newcount
\globalscratchcountertwo
465
\newcount
\globalscratchcounterthree
466 467
\mutable
\let
\scratchmacro
\relax
468
\mutable
\let
\scratchmacroone
\relax
469
\mutable
\let
\scratchmacrotwo
\relax
470 471
%D \macros
472
%D {tempstring, scratchstring*}
473 474
\mutable
\let
\tempstring
\empty
475 476
\mutable
\let
\scratchstring
\empty
477
\mutable
\let
\scratchstringone
\empty
478
\mutable
\let
\scratchstringtwo
\empty
479 480
%D \macros
481
%D {scratchwidth, scratchheight, scratchdepth, scratchoffset, scratchdistance}
482
%D
483
%D A few more scratch dimensions:
484 485
\newdimen
\scratchwidth
486
\newdimen
\scratchheight
487
\newdimen
\scratchdepth
488
\newdimen
\scratchtotal
489 490
\newdimen
\scratchoffset
491
\newdimen
\scratchleftoffset
492
\newdimen
\scratchrightoffset
493
\newdimen
\scratchtopoffset
494
\newdimen
\scratchbottomoffset
495 496
\newdimen
\scratchdistance
497 498
\newdimen
\scratchhsize
499
\newdimen
\scratchvsize
500 501
\newdimen
\scratchxoffset
502
\newdimen
\scratchyoffset
503
\newdimen
\scratchhoffset
504
\newdimen
\scratchvoffset
505 506
\newdimen
\scratchxposition
507
\newdimen
\scratchyposition
508 509
\newcount
\scratchnx
510
\newcount
\scratchny
511 512
\newcount
\scratchmx
513
\newcount
\scratchmy
514 515
\newcount
\scratchmin
516
\newcount
\scratchmax
517 518
\newcount
\scratchunicode
519 520
\newdimen
\scratchleftskip
521
\newdimen
\scratchrightskip
522
\newdimen
\scratchtopskip
523
\newdimen
\scratchbottomskip
524 525
%D More allocations:
526 527
% \newcount \maxcount \immutable\maxcount 2147483647
528 529
% \newdimen \zeropoint \immutable\zeropoint 0pt
530
% \newdimen \onepoint \immutable\onepoint 1pt
531
% \newdimen \halfapoint \immutable\halfapoint 0.5pt
532
% \newdimen \maxdimen \immutable\maxdimen 16383.99999pt % 1073741823sp
533
% \newdimen \onebasepoint \immutable\onebasepoint 1bp
534
% \newdimen \scaledpoint \immutable\scaledpoint 1sp
535
% \newdimen \thousandpoint \immutable\thousandpoint 1000pt
536 537
\immutable
\integerdef
\maxcount
2
1
4
7
4
8
3
6
4
7
538 539
\immutable
\dimensiondef
\zeropoint
0
pt
540
\immutable
\dimensiondef
\onepoint
1
pt
541
\immutable
\dimensiondef
\halfapoint
0
.
5
pt
542
\immutable
\dimensiondef
\maxdimen
1
6
3
8
3
.
9
9
9
9
9
pt
% 1073741823sp
543
\immutable
\dimensiondef
\onebasepoint
1
bp
544
\immutable
\dimensiondef
\scaledpoint
1
sp
545
\immutable
\dimensiondef
\thousandpoint
1
0
0
0
pt
546 547
\immutable
\gluespecdef
\zeroskip
0
pt
plus
0
pt
minus
0
pt
548 549
\immutable
\mugluespecdef
\zeromuskip
0
mu
550
\immutable
\mugluespecdef
\onemuskip
1
mu
551
\immutable
\mugluespecdef
\muquad
1
8
mu
552 553
\aliased
\let
\points
\onepoint
554
\aliased
\let
\halfpoint
\halfapoint
555 556
\newtoks
\emptytoks
557 558
%D And even more: (todo: countdefs 60+). Watch out, we need a count for a negative constant
559
%D but can use chardefs for positive ones. Actually, because we have plenty of counters we
560
%D can also use counts for those.
561 562
%immutable\integerdef\minusone -1
563
\immutable
\integerdef
\minustwo
-
2
564
%immutable\integerdef\zerocount 0
565
%immutable\integerdef\plusone 1
566
\immutable
\integerdef
\plustwo
2
567
\immutable
\integerdef
\plusthree
3
568
\immutable
\integerdef
\plusfour
4
569
\immutable
\integerdef
\plusfive
5
570
\immutable
\integerdef
\plussix
6
571
\immutable
\integerdef
\plusseven
7
572
\immutable
\integerdef
\pluseight
8
573
\immutable
\integerdef
\plusnine
9
574
\immutable
\integerdef
\plusten
1
0
575
\immutable
\integerdef
\pluseleven
1
1
576
\immutable
\integerdef
\plustwelve
1
2
577
\immutable
\integerdef
\plussixteen
1
6
578
\immutable
\integerdef
\plusfifty
5
0
579
\immutable
\integerdef
\plushundred
1
0
0
580
\immutable
\integerdef
\plusonehundred
1
0
0
581
\immutable
\integerdef
\plustwohundred
2
0
0
582
\immutable
\integerdef
\plusfivehundred
5
0
0
583
\immutable
\integerdef
\pluscxxvii
1
2
7
584
\immutable
\integerdef
\pluscxxviii
1
2
8
585
\immutable
\integerdef
\pluscclv
2
5
5
586
\immutable
\integerdef
\pluscclvi
2
5
6
587
\immutable
\integerdef
\plusthousand
1
0
0
0
588
\immutable
\integerdef
\plustenthousand
1
0
0
0
0
589
\immutable
\integerdef
\plustwentythousand
2
0
0
0
0
590
\immutable
\integerdef
\medcard
3
2
7
6
8
591
\immutable
\integerdef
\maxcard
6
5
5
3
6
% pdftex has less mathchars
592
\immutable
\integerdef
\maxcardminusone
6
5
5
3
5
593 594
%D \macros
595
%D {doubleexpandafter,tripleexpandafter,expanded,startexpanded}
596
%D
597
%D A few handy shortcuts
598 599
\permanent
\let
\singleexpandafter
\expandafter
600
\permanent
\def
\doubleexpandafter
{
\expandafter
\expandafter
\expandafter
}
601
\permanent
\def
\tripleexpandafter
{
\expandafter
\doubleexpandafter
\expandafter
}
602 603
%D We prefer the more readable variant than in plain \TEX. User should only
604
%D use \type {\emptybox}:
605 606
\newbox
\voidbox
% public
607 608
\permanent
\def
\unvoidbox
{
\unhbox
\voidbox
}
609
\permanent
\def
\emptybox
{
\box
\voidbox
}
% used in initializations so no attributes
610
\permanent
\def
\emptyvbox
{
\normalvpack
{
}
}
% no copy as we need to set attributes
611
\permanent
\def
\emptyhbox
{
\normalhpack
{
}
}
% no copy as we need to set attributes
612 613
\aliased
\let
\leavevmode
\unvoidbox
% we prefer to use \dontleavehmode
614 615
%D \macros
616
%D {dontcomplain,lessboxtracing}
617
%D
618
%D We need this one soon. The second one shows less box details (because that actually
619
%D slows down noticeably due to the more extensive details in node content.
620 621
% With \showboxdepth\maxcount and \showboxbreadth\maxcount the second one is way slower:
622
%
623
% \testfeatureonce{10}{\setbox\scratchbox\vbox {\samplefile{tufte}}} \elapsedtime\par
624
% \testfeatureonce{10}{\setbox\scratchbox\vbox to 10cm{\samplefile{tufte}}} \elapsedtime\par
625 626
\permanent
\protected
\def
\dontcomplain
627
{
\hbadness
\plustenthousand
628
\vbadness
\plustenthousand
629
\hfuzz
\maxdimen
630
\vfuzz
\maxdimen
}
631 632
\permanent
\protected
\def
\lessboxtracing
633
{
\showboxdepth
\plusthree
634
\showboxbreadth
\plusfive
}
635 636
%D Some expected plain variants follow. We don't reuse registers because we don't
637
%D want clashes. These will go away and packages that need them have to define them.
638 639
\aliased
\let
\p@
\onepoint
640
\aliased
\let
\m@ne
\minusone
641
\aliased
\let
\z@
\zeropoint
642
\aliased
\let
\@ne
\plusone
643
\aliased
\let
\tw@
\plustwo
644
\aliased
\let
\thr@@
\plusthree
645
\aliased
\let
\sixt@@n
\plussixteen
646
\aliased
\let
\@cclv
\pluscclv
647
\aliased
\let
\@cclvi
\pluscclvi
648
\aliased
\let
\voidb@x
\voidbox
649 650
\newtoks
\toks@
%scratchtoks
651 652
%D We define \type {\newif} a la plain \TEX, but will redefine it later. As Knuth
653
%D says:
654
%D
655
%D \startnarrower
656
%D And here's a different sort of allocation: for example,
657
%D
658
%D \starttyping
659
%D \newif\iffoo
660
%D \stoptyping
661
%D
662
%D creates \type {\footrue}, \type {\foofalse} to go with \type {\iffoo}.
663
%D \stopnarrower
664 665
% \protected\def\newif#1%
666
% {\count@\escapechar
667
% \escapechar\minusone
668
% \expandafter\expandafter\expandafter\def\new_if #1{true}{\let#1\iftrue }%
669
% \expandafter\expandafter\expandafter\def\new_if#1{false}{\let#1\iffalse}%
670
% \new_if#1{false}% the condition starts out false
671
% \escapechar\count@}
672
%
673
% \def\new_if#1#2%
674
% {\csname\expandafter\if@\string#1#2\endcsname}
675
%
676
% \bgroup % `if' is required
677
% \uccode`1=`i \uccode`2=`f \uppercase{\gdef\if@12{}}
678
% \egroup
679 680
% We use \csstring so there is no need to push/pop escapechar.
681
% We use different names so that we get a better error message.
682
%
683
% \protected\def\newif#1%
684
% {\let\new_if_saved\newif
685
% \let\newif\new_if_check
686
% \expandafter\expandafter\expandafter\def\new_if_cs #1{true}{\let#1\iftrue }%
687
% \expandafter\expandafter\expandafter\def\new_if_cs#1{false}{\let#1\iffalse}%
688
% \new_if_cs#1{false}%
689
% \let\newif\new_if_saved}
690
%
691
% \protected\def\new_if_cs#1#2%
692
% {\csname\expandafter\newif\csstring#1#2\endcsname}
693
%
694
% We wrap all into one macro (the frozen stuff adds 10% runtime):
695 696
\permanent
\protected
\def
\newif
#
1
%
697
{
\permanent
\protected
\gdefcsname
\expandafter
\new_if_check
\csstring
#
1
true
\endcsname
{
\overloaded
\frozen
\let
#
1
\iftrue
}
%
698
\permanent
\protected
\gdefcsname
\expandafter
\new_if_check
\csstring
#
1
false
\endcsname
{
\overloaded
\frozen
\let
#
1
\iffalse
}
%
699
\csname
\expandafter
\new_if_check
\csstring
#
1
false
\endcsname
}
700 701
\normalexpanded
{
\gdef
\noexpand
\new_if_check
\string
i
\string
f
{
}
}
702 703
%D Let's test this one:
704 705
\newif
\ifdone
706
\newif
\iffound
707 708
\newif
\ifscratchcondition
709
\newif
\ifscratchconditionone
710
\newif
\ifscratchconditiontwo
711 712
%D This used to be a protected definition with a \type {dimexpr} but now we have
713
%D it natively (less tracking noise).
714 715
\aliased
\let
\htdp
\boxtotal
716 717
%D A few shortcuts (gone by now):
718 719
% \permanent\protected\def\udef {\protected\def }
720
% \permanent\protected\def\ugdef{\protected\gdef}
721
% \permanent\protected\def\uedef{\protected\edef}
722
% \permanent\protected\def\uxdef{\protected\xdef}
723 724
% For now:
725 726
\permanent
\protected
\def
\defUmathtopaccent
#
1
#
2
#
3
#
4
{
\global
\immutable
\protected
\def
#
1
{
\Umathaccent
"
#
2
"
#
3
"
#
4
}
}
727
\permanent
\protected
\def
\defUmathbotaccent
#
1
#
2
#
3
#
4
{
\global
\immutable
\protected
\def
#
1
{
\Umathbotaccent
"
#
2
"
#
3
"
#
4
}
}
728
\permanent
\protected
\def
\defUdelimiterover
#
1
#
2
#
3
#
4
{
\global
\immutable
\protected
\def
#
1
{
\Udelimiterover
"
#
2
"
#
3
}
}
729
\permanent
\protected
\def
\defUdelimiterunder
#
1
#
2
#
3
#
4
{
\global
\immutable
\protected
\def
#
1
{
\Udelimiterunder
"
#
2
"
#
3
}
}
730
\permanent
\protected
\def
\defUdelimiter
#
1
#
2
#
3
#
4
{
\global
\immutable
\protected
\def
#
1
{
\Udelimiter
"
#
2
"
#
3
"
#
4
}
}
731
\permanent
\protected
\def
\defUradical
#
1
#
2
#
3
{
\global
\immutable
\protected
\def
#
1
{
\Uradical
"
#
2
"
#
3
}
}
732
\permanent
\protected
\def
\defUroot
#
1
#
2
#
3
{
\global
\immutable
\protected
\def
#
1
{
\Uroot
"
#
2
"
#
3
}
}
733
\permanent
\protected
\def
\defUmathchar
#
1
#
2
#
3
#
4
{
\global
\immutable
\Umathchardef
#
1
"
#
2
"
#
3
"
#
4
}
734 735
%D For a while we keep the following, as systems like tikz need it. Best not use
736
%D that one \CONTEXT. It will probably move to the tikz loader.
737 738
\aliased
\let
\active
\activecatcode
739 740
%D Constants to be used with \type {\interactionmode}.
741 742
\immutable
\integerdef
\batchmodecode
\zerocount
743
\immutable
\integerdef
\nonstopmodecode
\plusone
744
\immutable
\integerdef
\scrollmodecode
\plustwo
745
\immutable
\integerdef
\errorstopmodecode
\plusthree
746 747
%D Of course we want even bigger log files, so we copied this from the \ETEX\
748
%D source files.
749
%D
750
%D When watching such logs, beware of nasty side effects of \type {\scantokens},
751
%D as in:
752
%D
753
%D \starttyping
754
%D \bgroup
755
%D \lccode`a=12\lowercase{\xdef\whatever{a}}\egroup
756
%D \def\whatever{test \whatever test}
757
%D \scantokens\expandafter{\whatever}
758
%D \egroup
759
%D \stoptyping
760
%D
761
%D In \LUATEX\ we have ways around this.
762 763
% no longer \errorstopmode cf. plain tex 3.141592653
764 765
\permanent
\protected
\def
\tracingall
766
{
\tracingonline
\plusone
767
\tracingcommands
\plusfour
% > 3: show mode change independent
768
\tracingmacros
\plusthree
% > 2: obey \untraced
769
\tracingoutput
\plusone
770
\tracingpages
\plusone
771
\tracingparagraphs
\plustwo
772
\tracingrestores
\plusone
773
\tracinggroups
\plusone
774
\tracingifs
\plusone
775
\tracingnesting
\plusthree
776
\tracingassigns
\plustwo
777
\tracingmath
\plusone
778
\tracingalignments
\plustwo
% > 1: also show preamble
779
\showboxbreadth
\maxcount
780
\showboxdepth
\maxcount
}
781 782
\permanent
\protected
\def
\tracingless
783
{
\tracingall
784
\tracingoutput
\zerocount
785
\showboxbreadth
\maxcount
786
\showboxdepth
\plusten
}
787 788
\permanent
\protected
\def
\loggingall
789
{
\tracingall
790
\tracingonline
\zerocount
}
791 792
\permanent
\protected
\def
\tracingnone
793
{
\showboxdepth
\maxcount
% \plusthree
794
\showboxbreadth
\plusten
% \plusfive
795
\tracingalignments
\zerocount
796
\tracingmath
\zerocount
797
\tracingassigns
\zerocount
798
\tracingnesting
\zerocount
799
\tracingifs
\zerocount
800
\tracinggroups
\zerocount
801
\tracingrestores
\zerocount
802
\tracingparagraphs
\zerocount
803
\tracingpages
\zerocount
804
\tracingoutput
\zerocount
805
\tracingmacros
\zerocount
806
\tracingcommands
\zerocount
807
\tracingonline
\zerocount
}
808 809
%D When we want to see a box we can as well show all of it.
810 811
\showboxdepth
\maxcount
812
\showboxbreadth
\maxcount
813 814
%D Just for tracing purposes we set:
815 816
\tracingstats
\plusone
817 818
%D This is only used when we load \CONTEXT. Nesting is not supported here.
819 820
\permanent
\def
\pushoverloadmode
821
{
\enforced
\permanent
\protected
\edef
\popoverloadmode
{
\overloadmode
\the
\overloadmode
\enforced
\let
\popoverloadmode
\relax
}
%
822
\overloadmode
\zerocount
}
823 824
\aliased
\let
\popoverloadmode
\relax
825 826
\let
\pushrunstate
\relax
% will be defined later
827
\let
\poprunstate
\relax
% will be defined later
828 829
\newtoks
\everydump
830 831
\pushoverloadmode
832 833
\permanent
\protected
\def
\dump
834
{
\the
\everydump
835
\global
\everydump
\emptytoks
836
\pushoverloadmode
837
\enforced
\glet
\dump
\relax
838
\popoverloadmode
839
%let\pushoverloadmode\relax
840
%let\popoverloadmode\relax
841
% \tracingall
842
\normaldump
}
843 844
\permanent
\protected
\def
\input
845
{
\normalinput
}
846 847
\popoverloadmode
848 849
%D \macros
850
%D {newconditional,
851
%D settrue, setfalse,
852
%D ifconditional,then}
853
%D
854
%D \TEX's lacks boolean variables, although the \PLAIN\ format implements \type
855
%D {\newif}. The main disadvantage of this scheme is that it takes three hash table
856
%D entries. A more memory saving alternative is presented here. A conditional is
857
%D defined by:
858
%D
859
%D \starttyping
860
%D \newconditional\doublesided
861
%D \setfalse
862
%D \stoptyping
863
%D Setting a conditional is done by \type{\settrue} and
864
%D \type{\setfalse}:
865
%D
866
%D \starttyping
867
%D \settrue\doublesided
868
%D \setfalse
869
%D \stoptyping
870
%D while testing is accomplished by:
871
%D
872
%D \starttyping
873
%D \ifconditional\doublesided ... \else ... \fi
874
%D \setfalse
875
%D \stoptyping
876
%D We cannot use the simple scheme:
877
%D
878
%D \starttyping
879
%D \def\settrue #1{\let#1=\iftrue}
880
%D \def\setfalse#1{\let#1=\iffalse}
881
%D \stoptyping
882
%D
883
%D Such an implementation gives problems with nested conditionals. The next
884
%D implementation is about as fast and just as straightforward:
885 886
\aliased
\let
\conditionalfalse
\plusone
% maybe we will have a dedicated count/chardef
887
\aliased
\let
\conditionaltrue
\zerocount
% maybe we will have a dedicated count/chardef
888 889
% \permanent\protected\def\settrue #1{\integerdef#1\conditionaltrue }
890
% \permanent\protected\def\setfalse#1{\integerdef#1\conditionalfalse}
891
%
892
% \permanent\protected\def\settruevalue #1{\expandafter\integerdef\csname#1\endcsname\conditionaltrue }
893
% \permanent\protected\def\setfalsevalue#1{\expandafter\integerdef\csname#1\endcsname\conditionalfalse}
894 895
\permanent
\protected
\def
\settrue
#
1
{
\enforced
\let
#
1
\conditionaltrue
}
896
\permanent
\protected
\def
\setfalse
#
1
{
\enforced
\let
#
1
\conditionalfalse
}
897
\permanent
\protected
\def
\setconditional
#
1
{
\enforced
\let
#
1
}
898 899
\permanent
\protected
\def
\settruevalue
#
1
{
\enforced
\letcsname
#
1
\endcsname
\conditionaltrue
}
900
\permanent
\protected
\def
\setfalsevalue
#
1
{
\enforced
\letcsname
#
1
\endcsname
\conditionalfalse
}
901 902 903
\aliased
\let
\newconditional
\setfalse
904
\aliased
\let
\ifconditional
\ifcase
905 906
\permanent
\protected
\lettonothing
\then
% so that we can say: \ifnum1>2\then -)
907 908
\permanent
\def
\truecondition
{
\iftrue
}
909
\permanent
\def
\falsecondition
{
\iffalse
}
910 911
% This one has to be unprotected otherwise we get a files-ends-to-soon but it's ok
912
% as conditions expand anyway.
913 914
\permanent
\def
\quitcondition
{
\orelse
\iffalse
}
915 916
%D \macros
917
%D {newmacro,setnewmacro,newfraction}
918
%D
919
%D Let's be complete and also introduce some definers. These are not mandate
920
%D but handy for grepping. We make these mutable because they are \type
921
%D {\let} (the only advantage is that we often give them names with some
922
%D prefix.
923 924
\permanent
\protected
\def
\newmacro
#
1
{
\mutable
\let
#
1
\empty
}
925
\permanent
\protected
\def
\setnewmacro
#
1
{
\mutable
\let
#
1
}
926 927
\permanent
\protected
\def
\newfraction
#
1
{
\mutable
\let
#
1
\!!plusone
}
928 929
\def
\!!zerocount
{
0
}
% later redefined
930
\def
\!!plusone
{
1
}
% later redefined
931 932
%D It would be handy to have a primitive \type {\unless\ifcase} because then we
933
%D could use nicer values. Anyhow, this conditional code used to be in the \type
934
%D {syst-aux} module but is now promoted to here.
935 936
%D \macros
937
%D {ifzeropt}
938
%D
939
%D The next macro is both cosmetic and byte saving. It is pretty \type
940
%D {\if}||safe too. It can be used in cases like:
941
%D
942
%D \starttyping
943
%D \ifzeropt \somedimen ... \else ... \fi
944
%D \stoptyping
945 946
\aliased
\let
\ifzeropt
\ifcase
947 948
% these token list helpers might move to syst-aux.mkiv
949
%
950
% we assume a \cs. not toks0 or so
951
%
952
% \protected\def\appendtotoks #1#{\def\temp{#1}\afterassignment\doappendtotoks \scratchtoks=}
953
% \protected\def\prependtotoks#1#{\def\temp{#1}\afterassignment\doprependtotoks\scratchtoks=}
954 955
\newtoks
\t_syst_toks_temp
\let
\m_syst_toks_temp
\t_syst_toks_temp
956 957
\permanent
\protected
\def
\appendtotoks
#
1
{
\let
\m_syst_toks_temp
#
1
\afterassignment
\syst_toks_append_l
\t_syst_toks_temp
=
}
958
\permanent
\protected
\def
\prependtotoks
#
1
{
\let
\m_syst_toks_temp
#
1
\afterassignment
\syst_toks_prepend_l
\t_syst_toks_temp
=
}
959 960
% \def\syst_toks_append {\m_syst_toks_temp\expandafter\expandafter\expandafter{\expandafter\the\expandafter\m_syst_toks_temp\the\t_syst_toks_temp}}}
961
% \def\syst_toks_prepend{\m_syst_toks_temp\expandafter\expandafter\expandafter{\expandafter\the\expandafter\t_syst_toks_temp\the\m_syst_toks_temp}}}
962 963
\permanent
\protected
\def
\globalappendtotoks
#
1
{
\let
\m_syst_toks_temp
#
1
\afterassignment
\syst_toks_append_g
\t_syst_toks_temp
=
}
964
\permanent
\protected
\def
\globalprependtotoks
#
1
{
\let
\m_syst_toks_temp
#
1
\afterassignment
\syst_toks_prepend_g
\t_syst_toks_temp
=
}
965 966
\def
\syst_toks_append_l
{
\normalexpanded
{
\m_syst_toks_temp
{
\the
\m_syst_toks_temp
\the
\t_syst_toks_temp
}
}
}
967
\def
\syst_toks_prepend_l
{
\normalexpanded
{
\m_syst_toks_temp
{
\the
\t_syst_toks_temp
\the
\m_syst_toks_temp
}
}
}
968 969
\def
\syst_toks_append_g
{
\global
\syst_toks_append_l
}
970
\def
\syst_toks_prepend_g
{
\global
\syst_toks_prepend_l
}
971 972
\permanent
\protected
\def
\addtotoks
#
1
{
\let
\m_syst_toks_temp
#
1
\afterassignment
\syst_toks_add_l
\let
\next
}
973
\permanent
\protected
\def
\globaladdtotoks
#
1
{
\let
\m_syst_toks_temp
#
1
\afterassignment
\syst_toks_add_g
\let
\next
}
974 975
\def
\syst_toks_add_l
{
\m_syst_toks_temp
\expandafter
\bgroup
\the
\m_syst_toks_temp
}
976
\def
\syst_toks_add_g
{
\global
\syst_toks_add_l
}
977 978
\permanent
\protected
\def
\addtotokscs
#
1
#
2
{
#
1
{
\the
#
1
#
2
}
}
% saves a few bytes
979
\permanent
\protected
\def
\globaladdtotokscs
#
1
#
2
{
\global
#
1
{
\the
#
1
#
2
}
}
% saves a few bytes
980 981
%D \macros
982
%D {begcsname}
983
%D
984
%D Handy for \ETEX-only usage (avoids making \type {\relax}'s:
985 986
% \def\begcsname#1\endcsname{\ifcsname#1\endcsname\csname#1\endcsname\fi}
987 988
\aliased
\let
\begcsname
\begincsname
989 990
%D Now come a few macros that might be needed in successive loading. We redefine the
991
%D \type {\par} primitive pretty soon so that we get the equivalents right.
992 993
% too tricky: \par is use more often than a par starts so we have too much change
994
% that we get assymetrical behaviour
995
%
996
% \newtoks\everyendpar
997
%
998
% \protected\def\endpar{\the\everyendpar\normalpar}
999
% \protected\def\par {\endpar}
1000
%
1001
% \protected\def\reseteverypar
1002
% {\everypar \emptytoks
1003
% \everyendpar\emptytoks}
1004 1005
\permanent
\protected
\def
\reseteverypar
1006
{
\everypar
\emptytoks
}
1007 1008
\aliased
\let
\endgraf
\par
% plain, a kind of funny name
1009
%aliased\let\endline\cr % plain, not needed and probably also confusing
1010 1011
\permanent
\protected
\def
\null
{
\hpack
{
}
}
1012 1013
%D The following two might be overloaded later on but some modules need then
1014
%D earlier. These functionality is reflected in the name and will not change.
1015 1016
% \bgroup
1017
% \catcode`\^^M=\activecatcode%
1018
% \gdef\obeylines{\catcode`\^^M\activecatcode \let^^M\par}%
1019
% \glet^^M\par%
1020
% \egroup
1021
%
1022
% \bgroup
1023
% \gdef\obeyspaces{\catcode`\ \activecatcode}%
1024
% \obeyspaces\glet =\space%
1025
% \egroup
1026 1027
\def
\obeylines
{
\catcode
\endoflineasciicode
\activecatcode
\letcharcode
\endoflineasciicode
\par
}
% check if these can be \permanent
1028
\def
\obeyspaces
{
\catcode
\spaceasciicode
\activecatcode
\letcharcode
\spaceasciicode
\space
}
% check if these can be \permanent
1029 1030
% %D A constant:
1031
%
1032
% \let\endoflinetoken=^^M
1033 1034
%D Also needed might be a simple loop structure and we borrow plain \TEX's one
1035
%D as it is often expected to be present and it is about the fastest you can
1036
%D get. Beware: this macro does not support nested loops. We use a namespace
1037
%D prefix \type {@@pln}.
1038 1039
\let
\syst_plain_body
\relax
1040 1041
\permanent
\def
\loop
#
1
\repeat
{
\def
\syst_plain_body
{
#
1
}
\syst_plain_iterate
}
% might go
1042 1043
%D The following makes \type {\loop} \unknown\ \type {\if} \unknown\ \type
1044
%D {\repeat} skippable (clever trick):
1045 1046
\permanent
\let
\repeat
\fi
% so both \loop and \repeat are reserved words!
1047 1048
%D The original (no \type {syst_plain_} there):
1049
%D
1050
%D \starttyping
1051
%D \def\syst_plain_iterate
1052
%D {\syst_plain_body
1053
%D \let\next\syst_plain_iterate
1054
%D \else
1055
%D \let\next\relax
1056
%D \fi
1057
%D \next}
1058
%D \stoptyping
1059
%D
1060
%D A more efficient alternative:
1061
%D
1062
%D \starttyping
1063
%D \def\syst_plain_iterate
1064
%D {\syst_plain_body
1065
%D \expandafter\syst_plain_iterate
1066
%D \else\expandafter\relax\fi}
1067
%D \stoptyping
1068
%D
1069
%D An even more efficient one:
1070 1071
\def
\syst_plain_iterate
1072
{
\syst_plain_body
1073
\expandafter
\syst_plain_iterate
\else
\fi
}
1074 1075
%D We don't define a real output routine yet but at least get rid of pages:
1076 1077
\output
{
\shipout
\box
\normalpagebox
}
1078 1079
%D Although we don't add pagenumbers yet we alias the default register used
1080
%D for counting pages:
1081 1082
\permanent
\countdef
\pageno
\zerocount
\pageno
\plusone
% first page is number 1
1083 1084
%D Beside the raw counter \type {\pageno} the \type {\folio} macro provides
1085
%D the value.
1086 1087
\permanent
\def
\folio
{
\the
\pageno
}
% kind of expected and therefore reserved
1088 1089
%D The following registers are kind of standard and (for the moment) we define
1090
%D them here. This might change.
1091 1092
\newskip
\bigskipamount
\bigskipamount
=
1
2
pt
plus
4
pt
minus
4
pt
1093
\newskip
\medskipamount
\medskipamount
=
6
pt
plus
2
pt
minus
2
pt
1094
\newskip
\smallskipamount
\smallskipamount
=
3
pt
plus
1
pt
minus
1
pt
1095 1096
\baselineskip
=
1
2
pt
1097
\lineskip
=
1
pt
1098
\lineskiplimit
=
0
pt
1099 1100
%D Sometimes kerns make more sense than glue but we need to be in the right mode:
1101 1102
\permanent
\protected
\def
\vkern
{
\ifhmode
\par
\fi
\kern
}
1103
\permanent
\protected
\def
\hkern
{
\ifvmode
\dontleavehmode
\fi
\kern
}
1104 1105
\permanent
\protected
\def
\vpenalty
{
\ifhmode
\par
\fi
\penalty
}
1106
\permanent
\protected
\def
\hpenalty
{
\ifvmode
\dontleavehmode
\fi
\penalty
}
1107 1108
%D Again a few kind-of-extensions the core. These come from plain \TEX\ but are
1109
%D probably not used in \CONTEXT.
1110 1111
\newskip
\hideskip
\hideskip
=
-
1
0
0
0
pt
plus
1
fill
1112
\newskip
\centering
\centering
=
0
pt
plus
1
0
0
0
pt
minus
1
0
0
0
pt
1113 1114
\permanent
\def
\hidewidth
% for alignment entries that can stick out
1115
{
\hskip
\hideskip
}
1116 1117
\permanent
\def
\ialign
% initialized \halign
1118
{
\everycr
\emptytoks
1119
\tabskip
\zeroskip
1120
\halign
}
1121 1122
\newcount
\mscount
1123 1124
\permanent
\def
\spanomit
{
\span
\omit
}
% bypass error message
1125 1126
\permanent
\def
\multispan
#
1
%
1127
{
\omit
1128
\mscount
#
1
\relax
1129
\loop
1130
\ifnum
\mscount
>
\plusone
1131
\spanomit
\advance
\mscount
\minusone
1132
\repeat
}
1133 1134
\let
\nopdfcompression
\relax
% later
1135
\let
\onlypdfobjectcompression
\relax
% later
1136
\let
\maximumpdfcompression
\relax
% later
1137
\let
\normalpdfcompression
\relax
% later
1138 1139
%D Basic status stuff.
1140 1141
% \newif\ifproductionrun % already defined
1142 1143
%D For those who expect this \unknown
1144 1145
\ifdefined
\fmtname
\else
\immutable
\def
\fmtname
{
ConTeXt
Initial
TeX
}
\fi
1146
\ifdefined
\fmtversion
\else
\immutable
\def
\fmtversion
{
3
.
1
4
1
5
9
2
6
}
\fi
1147 1148
%D A few bonus macros:
1149 1150
%permanent\def\modulonumber#1#2{\the\numexpr#2-((((#2+(#1/2))/#1)-1)*#1)\relax}
1151
\permanent
\def
\modulonumber
#
1
#
2
{
\the
\numexpr
#
2
-
(
#
2
:
#
1
)
*
#
1
\relax
}
1152
\permanent
\def
\dividenumber
#
1
#
2
{
\the
\numexpr
(
#
2
-
(
#
1
/
2
)
)
/
#
1
\relax
}
1153 1154
%D These could be set at the \LUA\ end instead:
1155 1156
\immutable
\edef
\texenginename
{
\directlua{
tex
.
print
(
LUATEXENGINE
)
}
}
1157
\immutable
\edef
\texengineversion
{
\directlua{
tex
.
print
(
LUATEXVERSION
)
}
}
1158
\immutable
\edef
\texenginefunctionality
{
\directlua{
tex
.
print
(
LUATEXFUNCTIONALITY
)
}
}
1159 1160
%D We have no reason not to enable this:
1161 1162
\savingvdiscards
\plusone
1163 1164
%D We only can set this one via directives (system.synctex) and we only support
1165
%D the context variant. This will go away completely.
1166 1167
\newcount
\synctex
% \let\normalsynctex\synctex
1168 1169
%D We get rid of the funny \TEX\ offset defaults of one inch by setting them to zero.
1170 1171
% \voffset\zeropoint \overloaded\let\voffset\relax \newdimen\voffset \let\normalvoffset\voffset
1172
% \hoffset\zeropoint \overloaded\let\hoffset\relax \newdimen\hoffset \let\normalhoffset\hoffset
1173 1174
\matheqnogapstep
\zerocount
% for now
1175 1176
%D Now we define a few helpers that we need in a very early stage. We have no
1177
%D message system yet but redundant definitions are fatal anyway.
1178 1179
\newcount
\c_syst_helpers_n_of_namespaces
\c_syst_helpers_n_of_namespaces
\pluseight
% 1-8 reserved for catcodes
1180 1181
\def
\v_interfaces_prefix_template_system
{
\number
\c_syst_helpers_n_of_namespaces
>
>
}
1182
%def\v_interfaces_prefix_template_system{\characters\c_syst_helpers_n_of_namespaces>>} % no \characters yet
1183 1184
\protected
\def
\installsystemnamespace
#
1
% will be redefined
1185
{
\ifcsname
?
?
#
1
\endcsname
1186
\immediate
\write
\statuswrite
{
fatal
error
:
duplicate
system
namespace
'
#
1
'
}
%
1187
\else
1188
\global
\advance
\c_syst_helpers_n_of_namespaces
\plusone
1189
\immutable
\edefcsname
?
?
#
1
\endcsname
{
\v_interfaces_prefix_template_system
}
%
1190
\fi
}
1191 1192
%D It makes more sense to have these here:
1193 1194
\aliased
\let
\normalsuperscript
\Usuperscript
1195
\aliased
\let
\normalsubscript
\Usubscript
1196
\aliased
\let
\normalnosuperscript
\Unosuperscript
1197
\aliased
\let
\normalnosubscript
\Unosubscript
1198
\aliased
\let
\normalstartimath
\Ustartmath
1199
\aliased
\let
\normalstopimath
\Ustopmath
1200
\aliased
\let
\normalstartdmath
\Ustartdisplaymath
1201
\aliased
\let
\normalstopdmath
\Ustopdisplaymath
1202 1203
%D Also better here:
1204 1205
\immutable
\def
\wildcardsymbol
{
*
}
1206 1207
%D For a while we will keep these useless numbers as for instance tikz checks for them:
1208 1209
\immutable
\integerdef
\eTeXversion
2
1210
\immutable
\def
\eTeXrevision
{
2
}
1211 1212
%D Experiment:
1213 1214
\glyphoptions
"
8
0
% replaces \glyphdimensionsmode=1
1215 1216
%D Just in case users use this (or some styles still have it):
1217 1218
\aliased
\let
\immediateassignment
\immediate
1219
\aliased
\let
\immediateassigned
\localcontrolled
1220 1221
%D Needed (maybe no longer the multiple next ones):
1222 1223
\mutable
\let
\nexttoken
\relax
1224
\mutable
\let
\next
\relax
1225
\mutable
\let
\nextnext
\relax
1226
\mutable
\let
\nextnextnext
\relax
1227 1228
%D For now here: will get a proper solution
1229 1230
% \pushoverloadmode
1231
% \mutable\let\par\par
1232
% \popoverloadmode
1233 1234
%D Often used as cs key:
1235 1236
\mutable
\let
\on
\relax
% \empty
1237
\mutable
\let
\of
\relax
% \empty
1238
\mutable
\let
\and
\relax
% \empty
1239
\mutable
\let
\with
\relax
% \empty
1240
\mutable
\let
\nop
\empty
% used often
1241
\mutable
\let
\yes
\empty
% used often
1242 1243
%D Another experiment:
1244 1245
\def
\syst_suggested_alias
#
1
#
2
% expandable
1246
{
\beginlocalcontrol
1247
\writestatus
{
suggestion
}
{
use
\string
#
2
instead
of
\string
#
1
}
%
1248
\enforced
\glet
#
1
#
2
%
1249
\endlocalcontrol
1250
#
2
}
1251 1252
\permanent
\protected
\def
\suggestedalias
#
1
#
2
%
1253
{
\ifflags
#
2
\permanent
\permanent
\fi
% the rest is taken with the copy
1254
\def
#
1
{
\syst_suggested_alias
#
1
#
2
}
}
1255 1256
% A few traditional allocations (these might go too):
1257 1258
% \countdef \count@ 255 % hm, used in \newif .. todo: replace it there
1259
% \dimendef \dimen@ 0
1260
% \dimendef \dimen@i 1 % global only
1261
% \dimendef \dimen@ii 2
1262 1263
\suggestedalias
\count@
\scratchcounter
1264
\suggestedalias
\dimen@
\scratchdimen
1265
\suggestedalias
\dimen@i
\scratchdimenone
1266
\suggestedalias
\dimen@ii
\scratchdimentwo
1267 1268
%D The next feature is experimental and could go into another system module, but it
1269
%D feels more natural to have it here.
1270
%D
1271
%D \starttyping
1272
%D \begingroup
1273
%D \newlocaldimen\mydimena % \mydimena1\onepoint
1274
%D \newlocaldimen\mydimenb % \mydimenb2\onepoint
1275
%D \begingroup
1276
%D \newlocaldimen\mydimena % \mydimena3\onepoint
1277
%D \newlocaldimen\mydimenb % \mydimenb4\onepoint
1278
%D \newlocaldimen\mydimenc % \mydimenc5\onepoint
1279
%D \endgroup
1280
%D \endgroup
1281
%D
1282
%D \begingroup
1283
%D \setlocaldimen\mydimena 1\onepoint
1284
%D \setlocaldimen\mydimenb 2\onepoint
1285
%D \begingrou
1286
%D \setlocaldimen\mydimena 3\onepoint
1287
%D \setlocaldimen\mydimenb 4\onepoint
1288
%D \setlocaldimen\mydimenc 5\onepoint
1289
%D \endgroup
1290
%D \endgroup
1291
%D \stoptyping
1292
%D
1293
%D There is a little extra overhead in the overload protection but not that much.
1294 1295
\permanent
\countdef
\c_syst_local_count
=
2
2
1
\c_syst_local_count
=
\c_syst_max_allocated_register
1296
\permanent
\countdef
\c_syst_local_dimen
=
2
2
2
\c_syst_local_dimen
=
\c_syst_local_count
1297
\permanent
\countdef
\c_syst_local_skip
=
2
2
3
\c_syst_local_skip
=
\c_syst_local_count
1298
\permanent
\countdef
\c_syst_local_muskip
=
2
2
4
\c_syst_local_muskip
=
\c_syst_local_count
1299
\permanent
\countdef
\c_syst_local_box
=
2
2
5
\c_syst_local_box
=
\c_syst_local_count
1300
\permanent
\countdef
\c_syst_local_toks
=
2
2
6
\c_syst_local_toks
=
\c_syst_local_count
1301
\permanent
\countdef
\c_syst_local_read
=
2
2
7
\c_syst_local_read
=
\c_syst_local_count
1302
\permanent
\countdef
\c_syst_local_write
=
2
2
8
\c_syst_local_write
=
\c_syst_local_count
1303 1304
\c_syst_max_allocated_register
\numexpr
\c_syst_max_allocated_register
:
2
\relax
% floor
1305 1306
\permanent
\protected
\def
\syst_local_overflow
#
1
#
2
{
\writestatus
\m!system
{
no
room
for
local
#
1
\string
#
2
}
\wait
}
1307 1308
\permanent
\protected
\def
\setnewlocaldimen
#
1
%
1309
{
\ifnum
\c_syst_local_dimen
>
\c_syst_max_allocated_register
1310
\advance
\c_syst_local_dimen
\minusone
\dimendef
#
1
\c_syst_local_dimen
1311
\else
1312
\syst_local_overflow_dimen
#
1
%
1313
\fi
1314
#
1
}
1315 1316
\permanent
\protected
\def
\setnewlocalcount
#
1
%
1317
{
\ifnum
\c_syst_local_count
>
\c_syst_max_allocated_register
1318
\advance
\c_syst_local_count
\minusone
1319
\overloaded
\frozen
\countdef
#
1
\c_syst_local_count
1320
\else
1321
\syst_local_overflow_count
#
1
%
1322
\fi
1323
#
1
}
1324 1325
\permanent
\protected
\def
\setnewlocalskip
#
1
%
1326
{
\ifnum
\c_syst_local_skip
>
\c_syst_max_allocated_register
1327
\advance
\c_syst_local_skip
\minusone
1328
\overloaded
\frozen
\skipdef
#
1
\c_syst_local_skip
1329
\else
1330
\syst_local_overflow_skip
#
1
%
1331
\fi
1332
#
1
}
1333 1334
\permanent
\protected
\def
\setnewlocalmuskip
#
1
%
1335
{
\ifnum
\c_syst_local_muskip
>
\c_syst_max_allocated_register
1336
\advance
\c_syst_local_muskip
\minusone
1337
\overloaded
\frozen
\muskipdef
#
1
\c_syst_local_muskip
1338
\else
1339
\syst_local_overflow_muskip
#
1
%
1340
\fi
1341
#
1
}
1342 1343
\permanent
\protected
\def
\setnewlocaltoks
#
1
%
1344
{
\ifnum
\c_syst_local_toks
>
\c_syst_max_allocated_register
1345
\advance
\c_syst_local_toks
\minusone
1346
\overloaded
\frozen
\toksdef
#
1
\c_syst_local_toks
1347
\else
1348
\syst_local_overflow_toks
#
1
%
1349
\fi
1350
#
1
}
1351 1352
\permanent
\protected
\def
\setnewlocalbox
#
1
%
1353
{
\ifnum
\c_syst_local_box
>
\c_syst_max_allocated_register
1354
\advance
\c_syst_local_box
\minusone
1355
\overloaded
\frozen
\integerdef
#
1
\c_syst_local_box
1356
\else
1357
\syst_local_overflow_box
#
1
%
1358
\fi
1359
\setbox
#
1
}
1360 1361
\permanent
\protected
\def
\newlocalread
#
1
% so no set
1362
{
\ifnum
\c_syst_local_read
>
\c_syst_max_allocated_register
1363
\advance
\c_syst_local_read
\minusone
1364
\overloaded
\frozen
\integerdef
#
1
\c_syst_local_read
1365
\else
1366
\syst_local_overflow_read
#
1
%
1367
\fi
}
1368 1369
\permanent
\protected
\def
\newlocalwrite
#
1
% so no set
1370
{
\ifnum
\c_syst_local_write
>
\c_syst_max_allocated_register
1371
\advance
\c_syst_local_write
\minusone
1372
\overloaded
\frozen
\integerdef
#
1
\c_syst_local_write
1373
\else
1374
\syst_local_overflow_write
#
1
%
1375
\fi
}
1376 1377
%D The error handlers:
1378 1379
\permanent
\protected
\def
\syst_local_overflow_count
{
\syst_local_overflow
{
count
}
}
1380
\permanent
\protected
\def
\syst_local_overflow_dimen
{
\syst_local_overflow
{
dimen
}
}
1381
\permanent
\protected
\def
\syst_local_overflow_skip
{
\syst_local_overflow
{
skip
}
}
1382
\permanent
\protected
\def
\syst_local_overflow_muskip
{
\syst_local_overflow
{
muskip
}
}
1383
\permanent
\protected
\def
\syst_local_overflow_toks
{
\syst_local_overflow
{
toks
}
}
1384
\permanent
\protected
\def
\syst_local_overflow_box
{
\syst_local_overflow
{
box
}
}
1385
\permanent
\protected
\def
\syst_local_overflow_read
{
\syst_local_overflow
{
read
}
}
1386
\permanent
\protected
\def
\syst_local_overflow_write
{
\syst_local_overflow
{
write
}
}
1387 1388
%D We sacrifice a little performance but save some tokens by not defining these
1389
%D completely:
1390 1391
\permanent
\protected
\def
\newlocalcount
#
1
{
\setnewlocalcount
#
1
\zerocount
}
1392
\permanent
\protected
\def
\newlocaldimen
#
1
{
\setnewlocaldimen
#
1
\zeropoint
}
1393
\permanent
\protected
\def
\newlocalskip
#
1
{
\setnewlocalskip
#
1
\zeroskip
}
1394
\permanent
\protected
\def
\newlocalmuskip
#
1
{
\setnewlocalmuskip
#
1
\zeromuskip
}
1395
\permanent
\protected
\def
\newlocaltoks
#
1
{
\setnewlocaltoks
#
1
\emptytoks
}
1396
\permanent
\protected
\def
\newlocalbox
#
1
{
\setnewlocalbox
#
1
\emptybox
}
1397 1398
%D Let's be detailed: grouplevel:inputlevel:catcodetable (bits 1 2 4)
1399 1400
\tracinglevels
\plusthree
1401 1402
\permanent
\protected
\def
\tracingcatcodes
{
\tracinglevels
\plusseven
}
1403 1404
%D We just report duplicate patterns being ignored:
1405 1406
\tracinghyphenation
\plusone
1407 1408
%D Sometimes nicer:
1409 1410
\let
\ifexpression
\ifnumexpression
1411 1412
%D This will be default:
1413 1414
\autoparagraphmode
\plusone
% we need at least 1 in order to be able to switch to 2
1415
%autoparagraphmode\plustwo % because we define two \par delimited macros
1416 1417
%D The same values apply as \type {\shownodedetails}. When set the box is shown in
1418
%D the the log file but that is pretty slow when we have much detail.
1419 1420
\tracingfullboxes
\zerocount
1421 1422
\protect
\endinput
1423