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Diffstat (limited to 'Master/texmf-dist/tex/context/base/mkii/catc-ini.mkii')
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1 files changed, 269 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/context/base/mkii/catc-ini.mkii b/Master/texmf-dist/tex/context/base/mkii/catc-ini.mkii new file mode 100644 index 00000000000..7527466e103 --- /dev/null +++ b/Master/texmf-dist/tex/context/base/mkii/catc-ini.mkii @@ -0,0 +1,269 @@ +%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 ADE \& \CONTEXT\ Development Team}] +%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. + +%D A long standing wish has been the availability of catcode +%D arrays. Because traditional \TEX\ does ot provide this we +%D implement a fake method in the Mark II file. + +\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 +\chardef\invalidcatcode = 15 + +\chardef\tabasciicode = 9 % ^^I +\chardef\newlineasciicode = 10 % ^^J don't confuse this one with \endoflineasciicode +\chardef\formfeedasciicode = 12 % ^^L +\chardef\endoflineasciicode = 13 % ^^M somewhat messy but this can be the active \par +\chardef\endoffileasciicode = 26 % ^^Z +\chardef\spaceasciicode = 32 +\chardef\hashasciicode = 35 +\chardef\dollarasciicode = 36 +\chardef\commentasciicode = 37 +\chardef\ampersandasciicode = 38 +\chardef\backslashasciicode = 92 % `\\ +\chardef\circumflexasciicode = 94 +\chardef\underscoreasciicode = 95 +\chardef\leftbraceasciicode = 123 % `\{ +\chardef\barasciicode = 124 % `\| +\chardef\rightbraceasciicode = 125 % `\} +\chardef\tildeasciicode = 126 % `\~ +\chardef\delasciicode = 127 + +\newif \ifrecatcodeuppercharacters % only used in good old tex + +% \newcount\cctdefcounter \cctdefcounter\plusone % 0 = signal +\newcount\cctdefcounter \cctdefcounter\zerocount % 0 = signal, so advance before allocate + +\newcount\cctcountera +\newcount\cctcounterb +\newcount\cctcounterc + +\def\newcatcodetable#1% + {\global\advance\cctdefcounter\plusone + \global\mathchardef#1\cctdefcounter + \expandafter\xdef\csname @@ccn:\number\cctdefcounter\endcsname{\string#1}% logging + \expandafter\newtoks\csname @@cct:\number\cctdefcounter\endcsname} + +\mathchardef\currentcatcodetable\zerocount + +\newtoks \setdefaultlowercatcodes +\newtoks \setdefaultuppercatcodes + +\def\next#1% we don't have a proper loop defined yet + {\edef\nextnext{#1{\the#1\catcode\the\cctcountera\space + \ifnum\catcode\cctcountera=\lettercatcode \lettercatcode\else\othercatcode\fi}}% + \nextnext\ifnum\cctcountera<\cctcounterb \advance\cctcountera\plusone \expandafter\next\expandafter#1\fi} + +\cctcountera 0 \cctcounterb 127 \next\setdefaultlowercatcodes +\cctcountera 128 \cctcounterb 255 \next\setdefaultuppercatcodes + +\recatcodeuppercharactersfalse + +\def\catcodetable#1% + {\mathchardef\currentcatcodetable#1% + \the\setdefaultlowercatcodes + \ifrecatcodeuppercharacters\the\setdefaultuppercatcodes\fi + \the\csname @@cct:\number#1\endcsname} + +\long\def\startcatcodetable#1#2\stopcatcodetable + {\global\csname @@cct:\number#1\endcsname{#2}} + +\long\def\startextendcatcodetable#1#2\stopextendcatcodetable + {\global\csname @@cct:\number#1\endcsname\expandafter{\the\csname @@cct:\number#1\endcsname#2}} + +%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 + {\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} + +% un expandable 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\mathchardef\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 + |