diff options
Diffstat (limited to 'tex/context/base/syst-etx.tex')
| -rw-r--r-- | tex/context/base/syst-etx.tex | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/tex/context/base/syst-etx.tex b/tex/context/base/syst-etx.tex new file mode 100644 index 000000000..e00eab73c --- /dev/null +++ b/tex/context/base/syst-etx.tex @@ -0,0 +1,215 @@ +\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 \@@medallocation||\@@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 |