%D \module
%D   [       file=catc-def,
%D        version=2006.09.18,
%D          title=\CONTEXT\ Catcode Macros,
%D       subtitle=Default Tables,
%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 Contrary to \MKIV\ we define the catcode tables in one file. The original split
%D was a prelude to a split approach where context would run on top of a basic layer
%D (so that we could make smaller alternative formats) but that idea (from the early
%D days of \LUATEX) was dropped when I realized that there is not common ground to
%D cover between formats. It is simply not worth the trouble.

%D Maybe we also need a copy of \type {\ctxcatcodes} so that we can always go back
%D to the unpatched regime.

\ifdefined\nilcatcodes \else \newcatcodetable \nilcatcodes \fi
\ifdefined\texcatcodes \else \newcatcodetable \texcatcodes \fi
\ifdefined\luacatcodes \else \newcatcodetable \luacatcodes \fi
\ifdefined\notcatcodes \else \newcatcodetable \notcatcodes \fi
\ifdefined\rlncatcodes \else \newcatcodetable \rlncatcodes \fi
\ifdefined\vrbcatcodes \else \newcatcodetable \vrbcatcodes \fi
\ifdefined\prtcatcodes \else \newcatcodetable \prtcatcodes \fi
\ifdefined\ctxcatcodes \else \newcatcodetable \ctxcatcodes \fi
\ifdefined\txtcatcodes \else \newcatcodetable \txtcatcodes \fi
\ifdefined\tpacatcodes \else \newcatcodetable \tpacatcodes \fi % { }
\ifdefined\tpbcatcodes \else \newcatcodetable \tpbcatcodes \fi % < >
\ifdefined\ctdcatcodes \else \newcatcodetable \ctdcatcodes \fi % context definitions

\startcatcodetable \nilcatcodes
    \catcode\tabasciicode       \spacecatcode
    \catcode\endoflineasciicode \endoflinecatcode
    \catcode\formfeedasciicode  \endoflinecatcode
    \catcode\spaceasciicode     \spacecatcode
    \catcode\endoffileasciicode \ignorecatcode
\stopcatcodetable

\startcatcodetable \texcatcodes
    \catcode\tabasciicode       \spacecatcode
    \catcode\endoflineasciicode \endoflinecatcode
    \catcode\formfeedasciicode  \endoflinecatcode
    \catcode\spaceasciicode     \spacecatcode
    \catcode\endoffileasciicode \ignorecatcode
    \catcode\circumflexasciicode\superscriptcatcode
    \catcode\underscoreasciicode\subscriptcatcode
    \catcode\ampersandasciicode \alignmentcatcode
    \catcode\backslashasciicode \escapecatcode
    \catcode\leftbraceasciicode \begingroupcatcode
    \catcode\rightbraceasciicode\endgroupcatcode
    \catcode\dollarasciicode    \mathshiftcatcode
    \catcode\hashasciicode      \parametercatcode
    \catcode\commentasciicode   \commentcatcode
\stopcatcodetable

\startcatcodetable \luacatcodes
    \catcode\tabasciicode       \othercatcode
    \catcode\endoflineasciicode \othercatcode
    \catcode\formfeedasciicode  \othercatcode
    \catcode\spaceasciicode     \othercatcode
    \catcode\endoffileasciicode \ignorecatcode
    \catcode\circumflexasciicode\othercatcode
    \catcode\underscoreasciicode\othercatcode
    \catcode\ampersandasciicode \othercatcode
    \catcode\backslashasciicode \escapecatcode
    \catcode\commentasciicode   \othercatcode
    \catcode\hashasciicode      \othercatcode
    \catcode\barasciicode       \othercatcode
    \catcode\leftbraceasciicode \othercatcode
    \catcode\rightbraceasciicode\othercatcode
    \catcode\tildeasciicode     \othercatcode
    \catcode\dollarasciicode    \othercatcode
\stopcatcodetable

\startcatcodetable \notcatcodes % probably less needed
    \catcode\tabasciicode         \spacecatcode
    \catcode\endoflineasciicode   \endoflinecatcode
    \catcode\formfeedasciicode    \endoflinecatcode
    \catcode\spaceasciicode       \spacecatcode
    \catcode\endoffileasciicode   \ignorecatcode
    \catcode\circumflexasciicode  \othercatcode
    \catcode\underscoreasciicode  \othercatcode
    \catcode\ampersandasciicode   \othercatcode
    \catcode\tildeasciicode       \othercatcode
    \catcode\hashasciicode        \othercatcode
    \catcode\dollarasciicode      \othercatcode
    \catcode\commentasciicode     \othercatcode
    \catcode\lessthanasciicode    \othercatcode
    \catcode\morethanasciicode    \othercatcode
    \catcode\leftbraceasciicode   \othercatcode
    \catcode\rightbraceasciicode  \othercatcode
    \catcode\doublequoteasciicode \othercatcode
    \catcode\singlequoteasciicode \othercatcode
    \catcode\forwardslashasciicode\othercatcode
    \catcode\backslashasciicode   \othercatcode
    \catcode\barasciicode         \othercatcode
\stopcatcodetable

\startcatcodetable \rlncatcodes
    \catcode\tabasciicode         \othercatcode
    \catcode\endoflineasciicode   \othercatcode
    \catcode\formfeedasciicode    \othercatcode
    \catcode\spaceasciicode       \spacecatcode % maybe we also need a vector with space being other
    \catcode\endoffileasciicode   \othercatcode
    \catcode\circumflexasciicode  \othercatcode
    \catcode\underscoreasciicode  \othercatcode
    \catcode\ampersandasciicode   \othercatcode
    \catcode\tildeasciicode       \othercatcode
    \catcode\hashasciicode        \othercatcode
    \catcode\dollarasciicode      \othercatcode
    \catcode\commentasciicode     \othercatcode
    \catcode\lessthanasciicode    \othercatcode
    \catcode\morethanasciicode    \othercatcode
    \catcode\leftbraceasciicode   \othercatcode
    \catcode\rightbraceasciicode  \othercatcode
    \catcode\doublequoteasciicode \othercatcode
    \catcode\singlequoteasciicode \othercatcode
    \catcode\forwardslashasciicode\othercatcode
    \catcode\backslashasciicode   \othercatcode
    \catcode\barasciicode         \othercatcode
\stopcatcodetable

\startcatcodetable \vrbcatcodes % probably less needed
    \catcode\tabasciicode      \othercatcode
    \catcode\endoflineasciicode\othercatcode
    \catcode\formfeedasciicode \othercatcode
    \catcode\spaceasciicode    \othercatcode
    \catcode\endoffileasciicode\othercatcode
\stopcatcodetable

\startcatcodetable \prtcatcodes
    \catcode\tabasciicode            \spacecatcode
    \catcode\endoflineasciicode      \endoflinecatcode
    \catcode\formfeedasciicode       \endoflinecatcode
    \catcode\spaceasciicode          \spacecatcode
    \catcode\endoffileasciicode      \ignorecatcode
    \catcode\circumflexasciicode     \superscriptcatcode
    %catcode\underscoreasciicode     \subscriptcatcode
    \catcode\underscoreasciicode     \lettercatcode
    \catcode\ampersandasciicode      \alignmentcatcode
    \catcode\backslashasciicode      \escapecatcode
    \catcode\leftbraceasciicode      \begingroupcatcode
    \catcode\rightbraceasciicode     \endgroupcatcode
    \catcode\dollarasciicode         \mathshiftcatcode
    \catcode\hashasciicode           \parametercatcode
    \catcode\commentasciicode        \commentcatcode
    \catcode\atsignasciicode         \lettercatcode
    \catcode\exclamationmarkasciicode\lettercatcode
    \catcode\questionmarkasciicode   \lettercatcode
    \catcode\tildeasciicode          \activecatcode
    \catcode\barasciicode            \activecatcode
\stopcatcodetable

\startcatcodetable \ctxcatcodes
    \catcode\tabasciicode       \spacecatcode
    \catcode\endoflineasciicode \endoflinecatcode
    \catcode\formfeedasciicode  \endoflinecatcode
    \catcode\spaceasciicode     \spacecatcode
    \catcode\endoffileasciicode \ignorecatcode
  % \catcode\circumflexasciicode\superscriptcatcode
  % \catcode\underscoreasciicode\subscriptcatcode
  % \catcode\ampersandasciicode \alignmentcatcode
    \catcode\underscoreasciicode\othercatcode
    \catcode\circumflexasciicode\othercatcode
    \catcode\ampersandasciicode \othercatcode
    \catcode\backslashasciicode \escapecatcode
    \catcode\leftbraceasciicode \begingroupcatcode
    \catcode\rightbraceasciicode\endgroupcatcode
    \catcode\dollarasciicode    \mathshiftcatcode
    \catcode\hashasciicode      \parametercatcode
    \catcode\commentasciicode   \commentcatcode
    \catcode\tildeasciicode     \activecatcode
    \catcode\barasciicode       \activecatcode
\stopcatcodetable

\startcatcodetable \tpacatcodes
    \catcode\tabasciicode       \othercatcode
    \catcode\endoflineasciicode \othercatcode
    \catcode\formfeedasciicode  \othercatcode
    \catcode\spaceasciicode     \othercatcode
    \catcode\endoffileasciicode \othercatcode
    \catcode\leftbraceasciicode \begingroupcatcode
    \catcode\rightbraceasciicode\endgroupcatcode
\stopcatcodetable

\startcatcodetable \tpbcatcodes
    \catcode\tabasciicode       \othercatcode
    \catcode\endoflineasciicode \othercatcode
    \catcode\formfeedasciicode  \othercatcode
    \catcode\spaceasciicode     \othercatcode
    \catcode\endoffileasciicode \othercatcode
    \catcode\lessthanasciicode  \begingroupcatcode
    \catcode\morethanasciicode  \endgroupcatcode
\stopcatcodetable

\setnewconstant \doublecommentsignal "10FF25 %% < 110000 (last valid range)

\startcatcodetable \txtcatcodes
    \catcode\tabasciicode       \spacecatcode
    \catcode\endoflineasciicode \endoflinecatcode
    \catcode\formfeedasciicode  \endoflinecatcode
    \catcode\spaceasciicode     \spacecatcode
    \catcode\endoffileasciicode \ignorecatcode
    \catcode\backslashasciicode \escapecatcode
    \catcode\leftbraceasciicode \begingroupcatcode
    \catcode\rightbraceasciicode\endgroupcatcode
    \catcode\doublecommentsignal\commentcatcode
\stopcatcodetable

\startcatcodetable \ctdcatcodes
    \catcode\tabasciicode            \ignorecatcode
    \catcode\endoflineasciicode      \ignorecatcode
    \catcode\formfeedasciicode       \ignorecatcode
    \catcode\spaceasciicode          \ignorecatcode
    \catcode\endoffileasciicode      \ignorecatcode
    \catcode\circumflexasciicode     \superscriptcatcode % candidate
    \catcode\underscoreasciicode     \lettercatcode
    \catcode\ampersandasciicode      \alignmentcatcode
  % \catcode\colonasciicode          \lettercatcode      % candidate
    \catcode\backslashasciicode      \escapecatcode
    \catcode\leftbraceasciicode      \begingroupcatcode
    \catcode\rightbraceasciicode     \endgroupcatcode
    \catcode\dollarasciicode         \mathshiftcatcode
    \catcode\hashasciicode           \parametercatcode
    \catcode\commentasciicode        \commentcatcode
    \catcode\atsignasciicode         \lettercatcode
    \catcode\exclamationmarkasciicode\lettercatcode
    \catcode\questionmarkasciicode   \lettercatcode
    \catcode\tildeasciicode          \activecatcode
    \catcode\barasciicode            \activecatcode
\stopcatcodetable

%D From now on we can use the protection mechanisms.

\permanent\protected\def\unprotect                  {\pushcatcodetable\catcodetable\prtcatcodes}
\permanent\protected\def\protect                    {\popcatcodetable}

\permanent\protected\def\starttexcode               {\pushcatcodetable\catcodetable\prtcatcodes}
\permanent\protected\def\stoptexcode                {\popcatcodetable}

\permanent\protected\def\startcontextcode           {\pushcatcodetable\catcodetable\ctxcatcodes}
\permanent\protected\def\stopcontextcode            {\popcatcodetable}

\permanent\protected\def\startcontextdefinitioncode {\pushcatcodetable\catcodetable\ctdcatcodes}
\permanent\protected\def\stopcontextdefinitioncode  {\popcatcodetable}

%D We have a few active characters (left):

\letcatcodecommand \ctxcatcodes \barasciicode   \relax
\letcatcodecommand \ctxcatcodes \tildeasciicode \relax

%D Because some characters have a special meaning, we provide shortcuts to their
%D character representation. Some will be overloaded (which might change).

\permanent\chardef \^ = \circumflexasciicode
\permanent\chardef \_ = \underscoreasciicode
\permanent\chardef \& = \ampersandasciicode
\permanent\chardef \% = \commentasciicode
\permanent\chardef \# = \hashasciicode
\permanent\chardef \$ = \dollarasciicode
\permanent\chardef \{ = \leftbraceasciicode
\permanent\chardef \} = \rightbraceasciicode
\permanent\chardef \\ = \backslashasciicode
\permanent\chardef \| = \barasciicode

\pushoverloadmode
                \catcodetable       \ctxcatcodes
    \aliased\let\defaultcatcodetable\ctxcatcodes
\popoverloadmode

\endinput