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Diffstat (limited to 'Master/texmf-dist/tex/context/base/catc-ini.mkiv')
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1 files changed, 274 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/context/base/catc-ini.mkiv b/Master/texmf-dist/tex/context/base/catc-ini.mkiv new file mode 100644 index 00000000000..668a55d3bdd --- /dev/null +++ b/Master/texmf-dist/tex/context/base/catc-ini.mkiv @@ -0,0 +1,274 @@ +%D \module +%D [ file=catc-ini, +%D version=2006.09.18, +%D title=\CONTEXT\ System Macros, +%D subtitle=Catcode Handling, +%D author=Hans Hagen, +%D date=\currentdate, +%D copyright={PRAGMA / Hans Hagen \& Ton Otten}] +%C +%C This module is part of the \CONTEXT\ macro||package and is +%C therefore copyrighted by \PRAGMA. See mreadme.pdf for +%C details. + +%D We've split the functionality of syst-cat.* over more files +%D now so that we can load more selectively. + +\registerctxluafile{catc-ini} {1.001} + +%D A long standing wish has been the availability of catcode +%D arrays. Because traditional \TEX\ does not provide this we +%D implement a fake method in the \MKII\ file. There is some +%D overlap in code with \MKII\ but we take that for granted. + +\ifx\zerocount\undefined \chardef \zerocount= 0 \fi +\ifx\plusone \undefined \chardef \plusone = 1 \fi +\ifx\minusone \undefined \newcount\minusone \minusone =-1 \fi + +\chardef\escapecatcode = 0 +\chardef\begingroupcatcode = 1 +\chardef\endgroupcatcode = 2 +\chardef\mathshiftcatcode = 3 +\chardef\alignmentcatcode = 4 +\chardef\endoflinecatcode = 5 +\chardef\parametercatcode = 6 +\chardef\superscriptcatcode = 7 +\chardef\subscriptcatcode = 8 +\chardef\ignorecatcode = 9 +\chardef\spacecatcode = 10 +\chardef\lettercatcode = 11 +\chardef\othercatcode = 12 \chardef\other = 12 +\chardef\activecatcode = 13 \chardef\active = 13 +\chardef\commentcatcode = 14 + +\ifx\gobbleoneargument\undefined \long\def\gobbleoneargument#1{} \fi + +\newif \ifrecatcodeuppercharacters % only used in good old tex + +\newcount\cctdefcounter \cctdefcounter\zerocount % 0 = signal, so advance before allocate + +\newcount\cctcountera +\newcount\cctcounterb +\newcount\cctcounterc + +\def\newcatcodetable#1% + {\global\advance\cctdefcounter\plusone + \expandafter\xdef\csname @@ccn:\number\cctdefcounter\endcsname{\string#1}% logging + \global\chardef#1\cctdefcounter + \ctxlua{catcodes.register("\expandafter\gobbleoneargument\string#1",\number#1)}% + % we have two ways to access catcodetable numbers + \startruntimectxluacode tex.\expandafter\gobbleoneargument\string#1 = \number#1 ;\stopruntimectxluacode} + +\newcatcodetable \scratchcatcodes \initcatcodetable\scratchcatcodes + +\newtoks \setdefaultcatcodes + +\setdefaultcatcodes + {\catcode`\\ \othercatcode + \catcode`\^^M \othercatcode + \catcode`\ \othercatcode + \catcode`\% \othercatcode + \catcode127 \othercatcode} + +\long\def\startcatcodetable#1#2\stopcatcodetable + {\bgroup + \catcodetable\scratchcatcodes + \the\setdefaultcatcodes + #2% + \savecatcodetable#1\relax + \egroup} + +\newcatcodetable\dummycatcodes + +\long\def\startextendcatcodetable#1#2\stopextendcatcodetable + {\bgroup + \catcodetable#1\relax + \globaldefs\plusone + #2% + \globaldefs\zerocount + \egroup} + +% == +% +% \long\def\startextendcatcodetable#1#2\stopextendcatcodetable +% {\bgroup +% \scratchcounter\the\catcodetable +% \catcodetable #1 #2 +% \catcodetable\scratchcounter +% \egroup} + +\def\letcatcodecommand + {\afterassignment\letcatcodecommanda\cctcountera} + +\def\letcatcodecommanda + {\afterassignment\letcatcodecommandb\cctcounterb} + +\let\currentcatcodetable\catcodetable + +%D The next command can be defined in a cleaner way in the +%D Mk IV file but we want to have a fast one with a minimal +%D chance for interference. + +\chardef\activehackcode=`\~ + +%D Once a catcode is assigned, the next assignments will happen faster. + +% (expandable) let + +\def\letcatcodecommand {\afterassignment\letcatcodecommanda\cctcountera} +\def\letcatcodecommanda{\afterassignment\letcatcodecommandb\cctcounterb} + +\def\letcatcodecommandb % each time + {\ifcsname CCL:\number\cctcountera:\number\cctcounterb\endcsname + \csname CCL:\number\cctcountera:\number\cctcounterb\expandafter\endcsname + \else + \expandafter\letcatcodecommandc + \fi} + +\def\letcatcodecommandc % only first time + {\expandafter\gdef\csname CCL:\number\cctcountera:\number\cctcounterb\expandafter\endcsname\expandafter + {\expandafter\let\csname CCC:\number\cctcountera:\number\cctcounterb\endcsname}% + \reinstatecatcodecommanda + \csname CCL:\number\cctcountera:\number\cctcounterb\endcsname} + +% expandable def + +\def\defcatcodecommand {\afterassignment\defcatcodecommanda\cctcountera} +\def\defcatcodecommanda{\afterassignment\defcatcodecommandb\cctcounterb} + +\def\defcatcodecommandb % each time + {\ifcsname CCD:\number\cctcountera:\number\cctcounterb\endcsname + \csname CCD:\number\cctcountera:\number\cctcounterb\expandafter\endcsname + \else + \expandafter\defcatcodecommandc + \fi} + +\def\defcatcodecommandc % only first time (we could use \normalexpanded here) + {\expandafter\gdef\csname CCD:\number\cctcountera:\number\cctcounterb\expandafter\endcsname + \expandafter##\expandafter1\expandafter + {\expandafter\def\csname CCC:\number\cctcountera:\number\cctcounterb\endcsname{##1}}% + \reinstatecatcodecommanda + \csname CCD:\number\cctcountera:\number\cctcounterb\endcsname} + +% unexpandable def (e.g. used for discretionaries) + +\def\uedcatcodecommand {\afterassignment\uedcatcodecommanda\cctcountera} +\def\uedcatcodecommanda{\afterassignment\uedcatcodecommandb\cctcounterb} + +\def\uedcatcodecommandb % each time + {\ifcsname CCU:\number\cctcountera:\number\cctcounterb\endcsname + \csname CCU:\number\cctcountera:\number\cctcounterb\expandafter\endcsname + \else + \expandafter\uedcatcodecommandc + \fi} + +\def\uedcatcodecommandc % only first time + {\expandafter\gdef\csname CCU:\number\cctcountera:\number\cctcounterb\expandafter\endcsname + \expandafter##\expandafter1\expandafter + {\expandafter\unexpanded\expandafter\def\csname CCC:\number\cctcountera:\number\cctcounterb\endcsname{##1}}% + \reinstatecatcodecommanda + \csname CCU:\number\cctcountera:\number\cctcounterb\endcsname} + +\def\reinstatecatcodecommand{\afterassignment\reinstatecatcodecommanda\cctcounterb} + +\def\reinstatecatcodecommanda % can be used when a direct definition has been done + {\bgroup % and the selector has been lost + \uccode\activehackcode\cctcounterb + \catcode\uccode\activehackcode\activecatcode + \uppercase{\xdef~{\noexpand\catcodecommand{\number\cctcounterb}}}% + \egroup} + +\chardef\defaultcatcodetable\zerocount + +\def\catcodecommand#1% + {\csname CCC:\number + \ifcsname CCC:\number\currentcatcodetable:\number#1\endcsname + \currentcatcodetable \else \defaultcatcodetable + \fi + :\number#1\endcsname} + +%D \macros +%D {restorecatcodes, +%D beginrestorecatcodes,endrestorecatcodes} +%D +%D We're not finished dealing \CATCODES\ yet. In \CONTEXT\ we +%D use only one auxiliary file, which deals with tables of +%D contents, registers, two pass tracking, references etc. This +%D file, as well as files concerning graphics, is processed when +%D needed, which can be in the mid of typesetting verbatim. +%D However, when reading in data in verbatim mode, we should +%D temporary restore the normal \CATCODES, and that's exactly +%D what the next macros do. Saving the catcodes can be +%D disabled by saying \type{\localcatcodestrue}. + +\let\savedcatcodetable\relax + +\newcount\catcoderestorelevel + +\def\pushcatcodetable + {\advance\catcoderestorelevel\plusone + \tracepushcatcodetable + \expandafter\chardef\csname scct:\number\catcoderestorelevel\endcsname\currentcatcodetable} + +\def\popcatcodetable + {\ifcase\catcoderestorelevel + \showcatcodenestingerror + \else + \expandafter\catcodetable\csname scct:\number\catcoderestorelevel\endcsname + \tracepopcatcodetable + \advance\catcoderestorelevel\minusone + \fi} + +\def\showcatcodenestingerror % can be overloaded + {\immediate\write16{}% + \immediate\write16{Fatal error: catcode push/pop mismatch. Fix this!}\wait\end + \immediate\write16{}} + +\def\restorecatcodes % takes previous level + {\ifnum\catcoderestorelevel>\plusone + \expandafter\catcodetable\csname scct:\number\numexpr\catcoderestorelevel-1\relax\endcsname + \fi} + +\newtoks\everycatcodetable + +\def\setcatcodetable#1% + {\catcodetable#1% + \the\everycatcodetable + \tracesetcatcodetable} + +\def\dotracecatcodetable#1{\immediate\write16{[#1]}} + +\def\tracecatcodetables + {\def\tracesetcatcodetable {\dotracecatcodetable{set \catcodetablename\space at \number\catcoderestorelevel}}% + \def\tracepushcatcodetable{\dotracecatcodetable{push \catcodetablename\space from \catcodetableprev\space at \number\catcoderestorelevel}}% + \def\tracepopcatcodetable {\dotracecatcodetable{pop \catcodetablename\space to \catcodetableprev\space at \number\catcoderestorelevel}}} + +\def\catcodetableprev + {\ifnum\numexpr\catcoderestorelevel-1\relax>\zerocount + \csname @@ccn:\number\csname scct:\number\numexpr\catcoderestorelevel-1\relax\endcsname\endcsname + \else + -% + \fi} + +\def\catcodetablename + {\ifnum\currentcatcodetable>\zerocount + \csname @@ccn:\number\currentcatcodetable\endcsname + \else + -% + \fi} + +\ifx\empty\undefined \def\empty{} \fi + +\let\tracesetcatcodetable \empty +\let\tracepushcatcodetable\empty +\let\tracepopcatcodetable \empty + +\def\beginrestorecatcodes{\pushcatcodetable} +\def\endrestorecatcodes {\popcatcodetable} + +%D Handy for debugging: + +% \tracecatcodetables + +\endinput + |