% \iffalse meta-comment
%
% Written in 2010 by Manuel Pégourié-Gonnard.
%     <mpg@elzevir.fr>
%
% This work is under the CC0 license.
%
% This work consists of the main source file luatexbase-compat.dtx
% and the derived files
%   luatexbase-compat.pdf luatexbase-compat.sty
%   test-compat-plain.tex test-compat-latex.tex
%
% Unpacking:
%    tex luatexbase-compat.dtx
% Documentation:
%    pdflatex luatexbase-compat.dtx
%
%    The class ltxdoc loads the configuration file ltxdoc.cfg
%    if available. Here you can specify further options, e.g.
%    use A4 as paper format:
%       \PassOptionsToClass{a4paper}{article}
%
%<*ignore>
\begingroup
  \def\x{LaTeX2e}%
\expandafter\endgroup
\ifcase 0\ifx\install y1\fi\expandafter
         \ifx\csname processbatchFile\endcsname\relax\else1\fi
         \ifx\fmtname\x\else 1\fi\relax
\else\csname fi\endcsname
%</ignore>
%<*install>
\input docstrip.tex

\keepsilent
\askforoverwritefalse

\preamble

Written in 2010 by Manuel Pegourie-Gonnard.

This work is under the CC0 license.
See source file '\inFileName' for details.

\endpreamble

\generate{%
  \usedir{tex/luatex/luatexbase}%
  \file{luatexbase-compat.sty}{\from{luatexbase-compat.dtx}{texpackage}}%
}

\generate{%
  \usedir{doc/luatex/luatexbase}%
  \file{test-compat-plain.tex}{\from{luatexbase-compat.dtx}{testplain}}%
  \file{test-compat-latex.tex}{\from{luatexbase-compat.dtx}{testlatex}}%
}

\obeyspaces
\Msg{************************************************************************}
\Msg{*}
\Msg{* To finish the installation you have to move the following}
\Msg{* files into a directory searched by TeX:}
\Msg{*}
\Msg{*     luatexbase-compat.sty}
\Msg{*}
\Msg{* Happy TeXing!}
\Msg{*}
\Msg{************************************************************************}

\endbatchfile
%</install>
%<*ignore>
\fi
%</ignore>
%<*driver>
\NeedsTeXFormat{LaTeX2e}
\documentclass{ltxdoc}
\input lltxb-dtxstyle.tex
\EnableCrossrefs
\CodelineIndex
\begin{document}
  \DocInput{luatexbase-compat.dtx}%
\end{document}
%</driver>
% \fi
%
% \CheckSum{0}
%
% \CharacterTable
%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
%   Digits        \0\1\2\3\4\5\6\7\8\9
%   Exclamation   \!     Double quote  \"     Hash (number) \#
%   Dollar        \$     Percent       \%     Ampersand     \&
%   Acute accent  \'     Left paren    \(     Right paren   \)
%   Asterisk      \*     Plus          \+     Comma         \,
%   Minus         \-     Point         \.     Solidus       \/
%   Colon         \:     Semicolon     \;     Less than     \<
%   Equals        \=     Greater than  \>     Question mark \?
%   Commercial at \@     Left bracket  \[     Backslash     \\
%   Right bracket \]     Circumflex    \^     Underscore    \_
%   Grave accent  \`     Left brace    \{     Vertical bar  \|
%   Right brace   \}     Tilde         \~}
%
% \title{The \pk{luatexbase-compat} package}
% \date{2010/01/21 v0.1}
% \author{%
%  Manuel P\'egouri\'e-Gonnard \\ \email{mpg@elzevir.fr} \and
%   \'Elie Roux \\ \email{elie.roux@telecom-bretagne.eu}}
%
% \maketitle
%
% \begin{abstract}
% \end{abstract}
%
% \tableofcontents
%
% \section{Documentation}
%
%
%    \section{Implementation}
%
%    \begin{macrocode}
%<*texpackage>
%    \end{macrocode}
%
%    \subsection{Preliminaries}
%
%    Reload protection, especially for \plaintex.
%
%    \begin{macrocode}
                \csname lltxb@compat@loaded\endcsname
\expandafter\let\csname lltxb@compat@loaded\endcsname\endinput
%    \end{macrocode}
%
%    Catcode defenses.
%
%    \begin{macrocode}
\begingroup
  \catcode123 1 % {
  \catcode125 2 % }
  \catcode 35 6 % #
  \toks0{}%
  \def\x{}%
  \def\y#1 #2 {%
    \toks0\expandafter{\the\toks0 \catcode#1 \the\catcode#1}%
    \edef\x{\x \catcode#1 #2}}%
  \y 123 1  % {
  \y 125 2  % }
  \y  35 6  % #
  \y  10 12 % ^^J
  \y  34 12 % "
  \y  36 3  % $ $
  \y  39 12 % '
  \y  40 12 % (
  \y  41 12 % )
  \y  42 12 % *
  \y  43 12 % +
  \y  44 12 % ,
  \y  45 12 % -
  \y  46 12 % .
  \y  47 12 % /
  \y  60 12 % <
  \y  61 12 % =
  \y  64 11 % @ (letter)
  \y  62 12 % >
  \y  95 12 % _ (other)
  \y  96 12 % `
  \edef\y#1{\endgroup\edef#1{\the\toks0\relax}\x}%
\expandafter\y\csname lltxb@compat@AtEnd\endcsname
%    \end{macrocode}
%
%    Package declaration.
%
%    \begin{macrocode}
\begingroup
  \expandafter\ifx\csname ProvidesPackage\endcsname\relax
    \def\x#1[#2]{\immediate\write16{Package: #1 #2}}
  \else
    \let\x\ProvidesPackage
  \fi
\expandafter\endgroup
\x{luatexbase-compat}[2010/01/21 v0.1  Compatibility tools for LuaTeX  (mpg)]
%    \end{macrocode}
%
%    Make sure \luatex is used.
%
%    \begin{macrocode}
\begingroup\expandafter\expandafter\expandafter\endgroup
\expandafter\ifx\csname RequirePackage\endcsname\relax
  \input ifluatex.sty
\else
  \RequirePackage{ifluatex}
\fi
\ifluatex\else
  \begingroup
    \expandafter\ifx\csname PackageWarningNoLine\endcsname\relax
      \def\x#1#2{\begingroup\newlinechar10
        \immediate\write16{Package #1 warning: #2}\endgroup}
    \else
      \let\x\PackageWarningNoLine
    \fi
  \expandafter\endgroup
  \x{luatexbase-compat}{LuaTeX is required for this package. Aborting.}
  \lltxb@compat@AtEnd
  \expandafter\endinput
\fi
%    \end{macrocode}
%
%    \subsection{\cs{directlua} abstraction}
%
%    Define |\luatexbase@directlua| to be either |\directlua0| or
%    |\directlua|, depending on the version of \luatex.
%
%    \begin{macrocode}
\begingroup
\expandafter\ifx\csname newcommand\endcsname\relax
  \toks0{\long\def\luatexbase@directlua}%
\else
  \toks0{\newcommand\luatexbase@directlua}%
\fi
\ifnum\luatexversion<36
  \toks0\expandafter{\the\toks0{\directlua0}}%
\else
  \toks0\expandafter{\the\toks0{\directlua}}%
\fi
\expandafter\endgroup
\the\toks0
%    \end{macrocode}
%
%    \subsection{Primitives}
%
%    \begin{macrocode}
\begingroup
\expandafter\ifx\csname newcommand\endcsname\relax
  \toks0{\def\luatexbase@ensure@primitive#1}
\else
  \toks0{\newcommand*\luatexbase@ensure@primitive[1]}
\fi
\toks2{}\def\x#1{\toks2\expandafter{\the\toks2 #1}}
\x{%
  \ifcsname luatex#1\endcsname \else}
\ifnum\luatexversion<37\relax
%    \end{macrocode}
%
%    |tex.enableprimitives()| not available. If the unprefixed primitive is
%    undefined, issue an error.
%
%    \begin{macrocode}
  \x{%
    \begingroup\expandafter\expandafter\expandafter\endgroup
    \expandafter\ifx\csname #1\endcsname\relax}
  \begingroup\expandafter\expandafter\expandafter\endgroup
  \expandafter\ifx\csname PackageError\endcsname\relax
    \x{%
      \errmessage{%
        Package luatexbase-compat error: failed to enable `#1'.}}
  \else
    \x{%
      \PackageError{luatexbase-compat}{%
        Package luatexbase-compat error: failed to enable `#1'.}{}}
  \fi
  \x{%
    \else}
%    \end{macrocode}
%
%    Use the unprefixed primitive to define the prefixed version.
%
%    \begin{macrocode}
  \x{%
      \expandafter\let\csname luatex#1\expandafter\endcsname
      \csname#1\endcsname
    \fi}
\else
%    \end{macrocode}
%
%    |tex.enableprimitives()| available, use it.
%
%    \begin{macrocode}
  \x{%
    \luatexbase@directlua{tex.enableprimitives('luatex', '#1')}}
\fi
\x{%
  \fi}
\toks0\expandafter{\the\toks0\expandafter{\the\toks2}}
\expandafter\endgroup
\the\toks0
%    \end{macrocode}
%
%    That's all folks!
%
%    \begin{macrocode}
\lltxb@compat@AtEnd
%</texpackage>
%    \end{macrocode}
%
%    \section{Test files}
%
%    Test fils for Plain and LaTeX
%
%    \begin{macrocode}
%<testplain>\input luatexbase-compat.sty
%<testlatex>\RequirePackage{luatexbase-compat}
%<*testplain,testlatex>
\catcode64 11
\luatexbase@directlua{local answer = 42}
\luatexbase@ensure@primitive{primitive}
\luatexprimitive\relax
%</testplain,testlatex>
%<testplain>\bye
%<testlatex>\stop
%    \end{macrocode}
%
%
% \Finale
\endinput