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% \iffalse meta-comment
%
%% File: l3sys.dtx Copyright (C) 2015 The LaTeX3 Project
%%
%% It may be distributed and/or modified under the conditions of the
%% LaTeX Project Public License (LPPL), either version 1.3c of this
%% license or (at your option) any later version. The latest version
%% of this license is in the file
%%
%% http://www.latex-project.org/lppl.txt
%%
%% This file is part of the "l3kernel bundle" (The Work in LPPL)
%% and all files in that bundle must be distributed together.
%%
%% The released version of this bundle is available from CTAN.
%%
%% -----------------------------------------------------------------------
%%
%% The development version of the bundle can be found at
%%
%% http://www.latex-project.org/svnroot/experimental/trunk/
%%
%% for those people who are interested.
%%
%%%%%%%%%%%
%% NOTE: %%
%%%%%%%%%%%
%%
%% Snapshots taken from the repository represent work in progress and may
%% not work or may contain conflicting material! We therefore ask
%% people _not_ to put them into distributions, archives, etc. without
%% prior consultation with the LaTeX3 Project.
%%
%% -----------------------------------------------------------------------
%
%<*driver>
\documentclass[full]{l3doc}
%</driver>
%<*driver|package>
\GetIdInfo$Id$
{L3 Experimental system/runtime functions}
%</driver|package>
%<*driver>
\begin{document}
\DocInput{\jobname.dtx}
\end{document}
%</driver>
% \fi
%
% \title{^^A
% The \pkg{l3sys} package\\System/runtime functions^^A
% \thanks{This file describes v\ExplFileVersion,
% last revised \ExplFileDate.}^^A
% }
%
% \author{^^A
% The \LaTeX3 Project\thanks
% {^^A
% E-mail:
% \href{mailto:latex-team@latex-project.org}
% {latex-team@latex-project.org}^^A
% }^^A
% }
%
% \date{Released \ExplFileDate}
%
% \maketitle
%
% \begin{documentation}
%
% \subsection{Engine-specific conditionals}
%
% \begin{function}[added = 2015-09-07, EXP, pTF]^^A
% {^^A
% \sys_if_engine_luatex:,
% \sys_if_engine_pdftex:,
% \sys_if_engine_ptex: ,
% \sys_if_engine_uptex: ,
% \sys_if_engine_xetex:
% }
% \begin{syntax}
% \cs{sys_if_engine_pdftex:TF} \Arg{true code} \Arg{false code}
% \end{syntax}
% Conditionals which allow engine-specific code to be used. The names
% follow naturally from those of the engine binaries: note that the
% |(u)ptex| tests are for \epTeX{} and \eupTeX{} as \pkg{expl3} requires
% the \eTeX{} extensions. Each conditional is true for
% \emph{exactly one} supported engine. In particular,
% |\sys_if_engine_ptex_p:| is true for \epTeX{} but false for \eupTeX{}.
% \end{function}
%
% \end{documentation}
%
% \begin{implementation}
%
% \section{\pkg{l3sys} implementation}
%
% \begin{macrocode}
%<*initex|package>
% \end{macrocode}
%
% \subsubsection{Detecting the engine}
%
% \begin{macro}[pTF, EXP]^^A
% {^^A
% \sys_if_engine_luatex:,
% \sys_if_engine_pdftex:,
% \sys_if_engine_ptex:,
% \sys_if_engine_uptex:,
% \sys_if_engine_xetex:
% }
% Set up the engine tests on the basis exactly one test should be true.
% Mainly a case of looking for the appropriate marker primitive. For
% \upTeX{}, there is a complexity in that setting |-kanji-internal=sjis|
% or |-kanji-internal=euc| effective makes it more like \pTeX{}. In those
% cases we therefore report \pTeX{} rather than \upTeX{}.
% \begin{macrocode}
\clist_map_inline:nn { lua , pdf , p , up , xe }
{
\cs_new_eq:cN { sys_if_engine_ #1 tex:T } \use_none:n
\cs_new_eq:cN { sys_if_engine_ #1 tex:F } \use:n
\cs_new_eq:cN { sys_if_engine_ #1 tex:TF } \use_ii:nn
\cs_new_eq:cN { sys_if_engine_ #1 tex_p: } \c_false_bool
}
\cs_if_exist:NT \luatex_luatexversion:D
{
\cs_gset_eq:NN \sys_if_engine_luatex:T \use:n
\cs_gset_eq:NN \sys_if_engine_luatex:F \use_none:n
\cs_gset_eq:NN \sys_if_engine_luatex:TF \use_i:nn
\cs_gset_eq:NN \sys_if_engine_luatex_p: \c_true_bool
}
\cs_if_exist:NT \pdftex_pdftexversion:D
{
\cs_gset_eq:NN \sys_if_engine_pdftex:T \use:n
\cs_gset_eq:NN \sys_if_engine_pdftex:F \use_none:n
\cs_gset_eq:NN \sys_if_engine_pdftex:TF \use_i:nn
\cs_gset_eq:NN \sys_if_engine_pdftex_p: \c_true_bool
}
\cs_if_exist:NT \ptex_kanjiskip:D
{
\bool_if:nTF
{
\cs_if_exist_p:N \uptex_disablecjktoken:D &&
\int_compare_p:nNn { \ptex_jis:D "2121 } = { "3000 }
}
{
\cs_gset_eq:NN \sys_if_engine_uptex:T \use:n
\cs_gset_eq:NN \sys_if_engine_uptex:F \use_none:n
\cs_gset_eq:NN \sys_if_engine_uptex:TF \use_i:nn
\cs_gset_eq:NN \sys_if_engine_uptex_p: \c_true_bool
}
{
\cs_gset_eq:NN \sys_if_engine_ptex:T \use:n
\cs_gset_eq:NN \sys_if_engine_ptex:F \use_none:n
\cs_gset_eq:NN \sys_if_engine_ptex:TF \use_i:nn
\cs_gset_eq:NN \sys_if_engine_ptex_p: \c_true_bool
}
}
\cs_if_exist:NT \xetex_XeTeXversion:D
{
\cs_gset_eq:NN \sys_if_engine_xetex:T \use:n
\cs_gset_eq:NN \sys_if_engine_xetex:F \use_none:n
\cs_gset_eq:NN \sys_if_engine_xetex:TF \use_i:nn
\cs_gset_eq:NN \sys_if_engine_xetex_p: \c_true_bool
}
% \end{macrocode}
% \end{macro}
%
% \subsection{Deprecated functions}
%
% Deprecated 2015-09-07 for removal after 2016-12-31. The older logic supported
% only three engines so that has to be allowed for.
% \begin{macrocode}
\prg_new_eq_conditional:NNn \luatex_if_engine: \sys_if_engine_luatex:
{ T , F , TF , p }
\prg_new_eq_conditional:NNn \xetex_if_engine: \sys_if_engine_xetex:
{ T , F , TF , p }
\bool_if:nTF
{
\sys_if_engine_luatex_p: ||
\sys_if_engine_xetex_p:
}
{
\cs_new_eq:NN \pdftex_if_engine:T \use_none:n
\cs_new_eq:NN \pdftex_if_engine:F \use:n
\cs_new_eq:NN \pdftex_if_engine:TF \use_ii:nn
\cs_new_eq:NN \pdftex_if_engine_p: \c_false_bool
}
{
\cs_new_eq:NN \pdftex_if_engine:T \use:n
\cs_new_eq:NN \pdftex_if_engine:F \use_none:n
\cs_new_eq:NN \pdftex_if_engine:TF \use_i:nn
\cs_new_eq:NN \pdftex_if_engine_p: \c_true_bool
}
% \end{macrocode}
%
% \begin{macrocode}
%</initex|package>
% \end{macrocode}
%
%\end{implementation}
%
%\PrintIndex
|
