/
ltfiles.dtx
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ltfiles.dtx
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% \iffalse meta-comment
%
% Copyright (C) 1993-2022
% The LaTeX Project and any individual authors listed elsewhere
% in this file.
%
% This file is part of the LaTeX base system.
% -------------------------------------------
%
% It may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
% https://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2008 or later.
%
% This file has the LPPL maintenance status "maintained".
%
% The list of all files belonging to the LaTeX base distribution is
% given in the file `manifest.txt'. See also `legal.txt' for additional
% information.
%
% The list of derived (unpacked) files belonging to the distribution
% and covered by LPPL is defined by the unpacking scripts (with
% extension .ins) which are part of the distribution.
%
% \fi
%
% \iffalse
%%% From File: ltfiles.dtx
%<*driver>
% \fi
\ProvidesFile{ltfiles.dtx}
[2022/05/27 v1.2r LaTeX Kernel (File Handling)]
% \iffalse
\documentclass{ltxdoc}
\GetFileInfo{ltfiles.dtx}
\title{\filename}
\date{\filedate}
\author{%
Johannes Braams\and
David Carlisle\and
Alan Jeffrey\and
Leslie Lamport\and
Frank Mittelbach\and
Chris Rowley\and
Rainer Sch\"opf}
\providecommand\pkg[1]{\texttt{#1}}
\providecommand\InternalDetectionOff{}
\providecommand\InternalDetectionOn{}
\begin{document}
\MaintainedByLaTeXTeam{latex}
\maketitle
\DocInput{\filename}
\end{document}
%</driver>
% \fi
%
% \providecommand\hook[1]{\texttt{#1}}
%
%
% \changes{v1.0h}{1994/05/21}{Use new error commands}
% \changes{v1.0n}{1994/11/17}
% {\cs{@tempa} to \cs{reserved@a}}
% \changes{v1.0u}{1995/07/13}{Updates to docu}
% \changes{v1.1m}{2015/02/21}
% {Removed autoload support}
% \changes{v1.2i}{2020/08/21}{Integration of new hook management interface}
%
% \section{File Handling}
%
% The following user commands are defined in this part:
%
% \DescribeMacro{\document} (ie |\begin{document}|)\\
% Reads in the .AUX files and |\catcode|'s |@| to 12.
%
% \DescribeMacro{\nofiles}\\
% Suppresses all file output by setting |\@filesw| false.
%
% \DescribeMacro{\includeonly}\marg{NAME1, ... ,NAMEn}\\
% Causes only parts NAME1, ... ,NAMEn to be read by
% their |\include| commands. Works by setting \@partsw true
% and setting |\@partlist| to NAME1, ... ,NAMEn.
%
% \DescribeMacro{\include}\marg{NAME}\\
% Does an |\input| NAME unless |\@partsw| is true and
% NAME is not in |\@partlist|. If |\@filesw| is true, then
% it directs .AUX output to NAME.AUX, including a
% checkpoint at the end.
%
% \DescribeMacro{\input}\marg{NAME}\\
% The same as TeX's |\input|, except it allows optional
% braces around the file name. In \LaTeXe, it also avoids
% the primitive `missing file' error, if the file can not be
% found.
%
% \DescribeMacro{\IfFileExists}\marg{NAME}\marg{then}\marg{else}\\
% If the file exists on the system, execute \emph{then} otherwise
% execute \emph{else}.
%
% \DescribeMacro{\InputIfFileExists}\marg{NAME}\marg{then}\marg{else}\\
% If the file exists on the system, execute \emph{then} and input
% \emph{NAME} otherwise execute \emph{else}.
%
% \MaybeStop{}
%
% \changes{v1.0a}{1994/03/07}{Initial version, split from latex.dtx}
% \changes{v1.0a}{1994/03/07}{Long lines wrapped to 72 columns}
%
% \begin{oldcomments}
%
% \begin{macrocode}
%<*2ekernel>
\message{files,}
% \end{macrocode}
%
% VARIABLES, SWITCHES AND INTERNAL COMMANDS:
% \@mainaux : Output file number for main .AUX file.
% \@partaux : Output file number for current part's .AUX file.
% \@auxout : Either \@mainout or \@partout, depending on
% which .AUX file output goes to.
% \@input{foo} : If file foo exists, then \input's it,
% otherwise types a warning message.
% @filesw : Switch -- set false if no .AUX, .TOC, .IDX etc
% files are to be written
% @partsw : Set true by a \includeonly command.
% \@partlist : Set to the argument of the \includeonly command.
%
% \cp@FOO : The checkpoint for \include'd file FOO.TEX, written
% by \@writeckpt at the end of file FOO.AUX
%
%
% \includeonly{FILELIST} ==
% BEGIN
% \@partsw := T
% \@partlist := FILELIST
% END
%
% \include{FILE} ==
% BEGIN
% \clearpage
% if \@filesw = T
% then \immediate\write\@mainaux{\string\@input{FILE.AUX}}
% fi
% if \@partsw = T
% then \@tempswa := F
% \reserved@b == FILE
% for \reserved@a := \@partlist
% do if eval(\reserved@a) = eval(\reserved@b)
% then \@tempswa := T fi
% od
% fi
%
% if \@tempswa = T
% then \@auxout := \@partaux
% if \@filesw = T
% then \immediate\openout\@partaux{FILE.AUX}
% \immediate\write\@partaux{\relax}
% fi
% \@input{FILE.TEX}
% \clearpage
% \@writeckpt{FILE}
% if @filesw then \closeout \@partaux fi
% \@auxout := \@mainaux
% else \cp@FILE
% fi
% END
%
% \@writeckpt{FILE} ==
% BEGIN
% if \@filesw = T
% \immediate\write on file \@partaux:
% \@setckpt{FILE}{ %% }
% for \reserved@a := \cl@@ckpt
% do \immediate\write on file \@partaux:
% \global\string\setcounter
% {eval(\reserved@a)}{eval(\c@eval(\reserved@a))}
% od %% {
% \immediate\write on file \@partaux: }
% fi
% END
%
% \@setckpt{FILE}{LIST} ==
% BEGIN
% G \cp@FILE := LIST
% END
%
% INITIALIZATION
% \@tempswa := T
%
% \end{oldcomments}
%
%
% \begin{macro}{\@mainaux}
% \begin{macro}{\@partaux}
% \begin{macrocode}
\newwrite\@mainaux
\newwrite\@partaux
% \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\if@filesw}
% \begin{macro}{\if@partsw}
% \begin{macrocode}
\newif\if@filesw \@fileswtrue
\newif\if@partsw \@partswfalse
% \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\@clubpenalty}
% This stores the current normal (non-infinite) value of
% \cs{clubpenalty}; it should therefore be reset whenever the
% normal value is changed (as in the bibliography in the standard
% styles).
% \changes{v1.1h}{1996/10/05}{Added setting its value}
% \begin{macrocode}
\newcount\@clubpenalty
\@clubpenalty \clubpenalty
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\document}
% \changes{v0.9e}{1993/12/09}{Hook added}
% \begin{macrocode}
%</2ekernel>
%<latexrelease>\IncludeInRelease{2020/10/01}%
%<latexrelease> {\document}{Added hook to load l3backend code}%
%<*2ekernel|latexrelease>
\def\document{%
% \end{macrocode}
% We do cancel the grouping as part of the \cs{begin} handling
% (this is now done inside \cs{begin} instead) so that the
% \hook{env/\meta{env}/begin} hook is not hidden inside \cs{begingroup}
% \texttt{...} \cs{endgroup}.
% \begin{macrocode}
% \endgroup
% \end{macrocode}
%
% \begin{macrocode}
\UseOneTimeHook{begindocument/before}%
\@kernel@after@begindocument@before
% \end{macrocode}
%
% Added hook to load \textsf{l3backend} code:
% \changes{v1.2h}{2020/06/05}{Added hook to load \textsf{l3backend} code}
% \begin{macrocode}
\@expl@sys@load@backend@@
\ifx\@unusedoptionlist\@empty\else
\@latex@warning@no@line{Unused global option(s):^^J%
\@spaces[\@unusedoptionlist]}%
\fi
\@colht\textheight
\@colroom\textheight \vsize\textheight
\columnwidth\textwidth
\@clubpenalty\clubpenalty
\if@twocolumn
\advance\columnwidth -\columnsep
\divide\columnwidth\tw@ \hsize\columnwidth \@firstcolumntrue
\fi
\hsize\columnwidth \linewidth\hsize
\begingroup\@floatplacement\@dblfloatplacement
\makeatletter\let\@writefile\@gobbletwo
% \end{macrocode}
% \changes{v1.1a}{1995/10/24}
% {Removed multiplelabels switch}
% \begin{macrocode}
\global \let \@multiplelabels \relax
\@input{\jobname.aux}%
\endgroup
\if@filesw
\immediate\openout\@mainaux\jobname.aux
\immediate\write\@mainaux{\relax}%
\fi
% \end{macrocode}
%
% Dateline 1991/03/26: FMi added |\process@table| to support NFSS;
% This will also work with old lfonts if no other style defines
% |\process@table|. The following line forces the initialization of
% the math fonts.
% \begin{macrocode}
\process@table
\let\glb@currsize\@empty % Force math initialization.
% \end{macrocode}
% \changes{v0.9t}{1994/01/31}
% {set \cs{@normalsize} or \cs{normalsize} if necessary}
% \changes{v1.0d}{1994/03/28}
% {(DPC) remove \cs{@normalsize check}}
% \changes{v1.0d}{1994/03/28}
% {(DPC) Use \cs{normalsize} not \cs{@normalsize}}
% \changes{v1.0g}{1994/05/13}{Added execution of \cs{every@size}}
% \changes{v1.0m}{1994/11/07}{Renamed \cs{every@size} to
% \cs{every@math@size}.}
% \changes{v1.0q}{1995/04/25}
% {Removed execution of \cs{every@size} latex/1407}
% \begin{macrocode}
\normalsize
\everypar{}%
% \end{macrocode}
%
% So that punctuation in headings is not disturbed by verbatim
% or other local changes to the space factor codes, save the document
% default here. This will be locally reset by the output routine.
% For special cases a class may want to define |\normalsfcodes|
% directly, in case that definition will be used.
% (This is an old bug, problem existed in \LaTeX2.0x and plain \TeX.)
% \changes{v1.1k}{1997/04/14}
% {Set the document space factor defaults. latex/2404}
% \begin{macrocode}
\ifx\normalsfcodes\@empty
\ifnum\sfcode`\.=\@m
\let\normalsfcodes\frenchspacing
\else
\let\normalsfcodes\nonfrenchspacing
\fi
\fi
% \end{macrocode}
% For similar reasons also save the default language, this will be reset
% locally in the output routine. In particular it allows hyphenation
% in the page head even if the page break happens in verbatim.
% If this has already been set by a package, set to the value of |\language|
% at this point.
% \changes{v1.1n}{2017/03/10}{Save language default}
% \begin{macrocode}
\ifx\document@default@language\m@ne
\chardef\document@default@language\language
\fi
% \end{macrocode}
%
% Way back in 1991 (08/26) FMi \& RmS set the |\@noskipsec| switch
% to true in the preamble and to false here.
% This was done to trap lists and related text in the preamble but it
% does not catch everything; hence Change 1.1g was introduced.
% \begin{macrocode}
\@noskipsecfalse
% \end{macrocode}
% \changes{v1.1a}{1995/10/24}
% {Removed refundefined switch}
% \begin{macrocode}
\let \@refundefined \relax
% \end{macrocode}
% Just before disabling the preamble commands we execute the begin
% document hook which contains any code contributed by
% |\AtBeginDocument|. Also disable the gathering of the file list,
% if no |\listfiles| has been issued. |\AtBeginDocument| is redefined
% at this point so that and such commands that get into the hook do
% not chase their tail\ldots
% \changes{v1.1e}{1996/04/24}
% {(DPC) Reset \cs{AtBeginDocument} eg for latex/1297}
% \begin{macrocode}
\@kernel@before@begindocument
\UseOneTimeHook{begindocument}%
\@kernel@after@begindocument
% \end{macrocode}
%
% Most of the following assignments will be done globally in case
% the user adds something like |\begin{multicols}| to the document
% hook, i.e. starts are group in |\begin{document}|.
% \changes{v1.0r}{1995/04/27}
% {Added \cs{global} to support groups in hook}
% \changes{v1.0c}{1994/03/16}
% {(DPC) directly add file list settings}
% \changes{v1.0v}{1995/08/16}{set \cs{topskip} globally}
% \changes{v1.0v}{1995/08/16}{set \cs{@maxdepth}}
%
% \changes{v1.0s}{1995/05/25}
% {Added check for \cs{topskip} zero}
% \changes{v1.0t}{1995/05/25}
% {Corrected typo}
% Since a value of exactly 0pt for \cs{topskip} causes
% \cs{twocolumn[]} to misbehave, we add this check, hoping
% that it will not cause any problems elsewhere.
% \begin{macrocode}
\ifdim\topskip<1sp\global\topskip 1sp\relax\fi
\global\@maxdepth\maxdepth
\global\let\@begindocumenthook\@undefined
\ifx\@listfiles\@undefined
\global\let\@filelist\relax
\global\let\@addtofilelist\@gobble
\fi
% \end{macrocode}
% At the very end we disable all preamble commands. This has to
% happen after the begin document hooks was executed so that this
% hook can still use such commands.
% \changes{v0.9o}{1994/01/15}
% {move \cs{@preamblecmds} after document hook}
% \changes{v1.0v}{1995/08/16}{set \cs{do} globally}
% \begin{macrocode}
\gdef\do##1{\global\let ##1\@notprerr}%
\@preamblecmds
% \end{macrocode}
% The next line saves tokens and also allows |\@nodocument| to be
% used directly to trap preamble errors.
% \changes{v1.1g}{1996/09/29}{Added disabling of \cs{@nodocument}}
% \begin{macrocode}
\global\let \@nodocument \relax
% \end{macrocode}
% The next line is a pure safety measure in case a do list is ever
% expanded at the wrong place. In addition it will save a few
% tokens to get rid of the above definition.
% \begin{macrocode}
\global\let\do\noexpand
% \end{macrocode}
%
% \begin{macrocode}
\UseOneTimeHook{begindocument/end}%
% \end{macrocode}
% \changes{v1.1c}{1995/12/05}{\cs{ignorespaces} added for latex/1933}
% Use of the hook might mean that we are already in
% horizontal mode, so ignore the space after |\begin{document}|.
% \begin{macrocode}
\ignorespaces}
% \end{macrocode}
%
% The \hook{begindocument} hook already existed in the kernel since
% 1994 under the name \cs{atbegindocumenthook} the
% additional ones are originally from the \pkg{etoolbox}
% package under the names \cs{@endpreamblehook} \cs{afterpreamble}.
% \begin{macrocode}
\NewHook{begindocument}
\NewHook{begindocument/before}
\NewHook{begindocument/end}
% \end{macrocode}
% \begin{macro}{\@kernel@after@begindocument@before,
% \@kernel@before@begindocument,
% \@kernel@after@begindocument}
%
% Above we used two kernel only hooks to be run after the public
% \hook{begindocument/before} and after \hook{begindocument}
% hooks.
%
% In \cs{@kernel@after@begindocument@before} we already place one
% action: drop the fast execution code for the
% \hook{env/document/begin} hook. That hook marks the end of the
% preamble and should therefore only be run once. In a normal
% document that is anyway the case (so the code would just sit
% there taking up space afterwards, which these days is rather
% harmless), however, in more complicated scenarios where several
% full documents are combined to a single document it might get
% applied several times with harmful effects. We therefore
% explicitly drop it at this point. the coding is somewhat obscure
% due to the name of the macro which requires constructing.
% \InternalDetectionOff
% \begin{macrocode}
\edef \@kernel@after@begindocument@before {%
\let\expandafter\noexpand\csname
__hook env/document/begin\endcsname
\noexpand\@empty}
% \end{macrocode}
% \InternalDetectionOn
%
% These internal hooks are already declared earlier (in
% \texttt{ltexpl}) so that other modules could write to them.
% \changes{v1.2m}{2021/04/17}{Move \cs{@kernel@before@begindocument} and
% \cs{@kernel@after@begindocument} init earlier so that other modules can
% write to the hooks}
% \begin{macrocode}
%\let \@kernel@before@begindocument \@empty
%\let \@kernel@after@begindocument \@empty
% \end{macrocode}
%
% \end{macro}
%
%
% \begin{macrocode}
%</2ekernel|latexrelease>
%<latexrelease>\EndIncludeInRelease
% \end{macrocode}
%
% \begin{macrocode}
%<latexrelease>\IncludeInRelease{2017/04/15}%
%<latexrelease> {\document}{Save language for hyphenation}%
%<latexrelease>
%<latexrelease>\def\document{\endgroup
%<latexrelease> \ifx\@unusedoptionlist\@empty\else
%<latexrelease> \@latex@warning@no@line{Unused global option(s):^^J%
%<latexrelease> \@spaces[\@unusedoptionlist]}%
%<latexrelease> \fi
%<latexrelease> \@colht\textheight
%<latexrelease> \@colroom\textheight \vsize\textheight
%<latexrelease> \columnwidth\textwidth
%<latexrelease> \@clubpenalty\clubpenalty
%<latexrelease> \if@twocolumn
%<latexrelease> \advance\columnwidth -\columnsep
%<latexrelease> \divide\columnwidth\tw@ \hsize\columnwidth \@firstcolumntrue
%<latexrelease> \fi
%<latexrelease> \hsize\columnwidth \linewidth\hsize
%<latexrelease> \begingroup\@floatplacement\@dblfloatplacement
%<latexrelease> \makeatletter\let\@writefile\@gobbletwo
%<latexrelease> \global \let \@multiplelabels \relax
%<latexrelease> \@input{\jobname.aux}%
%<latexrelease> \endgroup
%<latexrelease> \if@filesw
%<latexrelease> \immediate\openout\@mainaux\jobname.aux
%<latexrelease> \immediate\write\@mainaux{\relax}%
%<latexrelease> \fi
%<latexrelease> \process@table
%<latexrelease> \let\glb@currsize\@empty % Force math initialization.
%<latexrelease> \normalsize
%<latexrelease> \everypar{}%
%<latexrelease> \ifx\normalsfcodes\@empty
%<latexrelease> \ifnum\sfcode`\.=\@m
%<latexrelease> \let\normalsfcodes\frenchspacing
%<latexrelease> \else
%<latexrelease> \let\normalsfcodes\nonfrenchspacing
%<latexrelease> \fi
%<latexrelease> \fi
%<latexrelease> \ifx\document@default@language\m@ne
%<latexrelease> \chardef\document@default@language\language
%<latexrelease> \fi
%<latexrelease> \@noskipsecfalse
%<latexrelease> \let \@refundefined \relax
%<latexrelease> \let\AtBeginDocument\@firstofone
%<latexrelease> \@begindocumenthook
%<latexrelease> \ifdim\topskip<1sp\global\topskip 1sp\relax\fi
%<latexrelease> \global\@maxdepth\maxdepth
%<latexrelease> \global\let\@begindocumenthook\@undefined
%<latexrelease> \ifx\@listfiles\@undefined
%<latexrelease> \global\let\@filelist\relax
%<latexrelease> \global\let\@addtofilelist\@gobble
%<latexrelease> \fi
%<latexrelease> \gdef\do##1{\global\let ##1\@notprerr}%
%<latexrelease> \@preamblecmds
%<latexrelease> \global\let \@nodocument \relax
%<latexrelease> \global\let\do\noexpand
%<latexrelease> \ignorespaces}
%<latexrelease>\EndIncludeInRelease
%<latexrelease>
%<latexrelease>\IncludeInRelease{0000/00/00}%
%<latexrelease> {\document}{Save language for hyphenation}
%<latexrelease>\def\document{\endgroup
%<latexrelease> \ifx\@unusedoptionlist\@empty\else
%<latexrelease> \@latex@warning@no@line{Unused global option(s):^^J%
%<latexrelease> \@spaces[\@unusedoptionlist]}%
%<latexrelease> \fi
%<latexrelease> \@colht\textheight
%<latexrelease> \@colroom\textheight \vsize\textheight
%<latexrelease> \columnwidth\textwidth
%<latexrelease> \@clubpenalty\clubpenalty
%<latexrelease> \if@twocolumn
%<latexrelease> \advance\columnwidth -\columnsep
%<latexrelease> \divide\columnwidth\tw@ \hsize\columnwidth
%<latexrelease> \@firstcolumntrue
%<latexrelease> \fi
%<latexrelease> \hsize\columnwidth \linewidth\hsize
%<latexrelease> \begingroup\@floatplacement\@dblfloatplacement
%<latexrelease> \makeatletter\let\@writefile\@gobbletwo
%<latexrelease> \global \let \@multiplelabels \relax
%<latexrelease> \@input{\jobname.aux}%
%<latexrelease> \endgroup
%<latexrelease> \if@filesw
%<latexrelease> \immediate\openout\@mainaux\jobname.aux
%<latexrelease> \immediate\write\@mainaux{\relax}%
%<latexrelease> \fi
%<latexrelease> \process@table
%<latexrelease> \let\glb@currsize\@empty
%<latexrelease> \normalsize
%<latexrelease> \everypar{}%
%<latexrelease> \ifx\normalsfcodes\@empty
%<latexrelease> \ifnum\sfcode`\.=\@m
%<latexrelease> \let\normalsfcodes\frenchspacing
%<latexrelease> \else
%<latexrelease> \let\normalsfcodes\nonfrenchspacing
%<latexrelease> \fi
%<latexrelease> \fi
%<latexrelease> \@noskipsecfalse
%<latexrelease> \let \@refundefined \relax
%<latexrelease> \let\AtBeginDocument\@firstofone
%<latexrelease> \@begindocumenthook
%<latexrelease> \ifdim\topskip<1sp\global\topskip 1sp\relax\fi
%<latexrelease> \global\@maxdepth\maxdepth
%<latexrelease> \global\let\@begindocumenthook\@undefined
%<latexrelease> \ifx\@listfiles\@undefined
%<latexrelease> \global\let\@filelist\relax
%<latexrelease> \global\let\@addtofilelist\@gobble
%<latexrelease> \fi
%<latexrelease> \gdef\do##1{\global\let ##1\@notprerr}%
%<latexrelease> \@preamblecmds
%<latexrelease> \global\let \@nodocument \relax
%<latexrelease> \global\let\do\noexpand
%<latexrelease> \ignorespaces}
%<latexrelease>\EndIncludeInRelease
%<*2ekernel>
% \end{macrocode}
%
% \begin{macrocode}
\@onlypreamble\document
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\normalsfcodes}
% \changes{v1.1k}{1997/04/14}
% {Macro added (from patch file) latex/2404}
% The setting of |\@empty| is just a flag. This command may be defined
% in a class or package file. If it is still |\@empty| at
% |\begin{document}| it will be defined to be |\frenchspacing| or
% |\nonfrenchspacing|, depending on which of those appears to be in
% effect at that point.
% \begin{macrocode}
\let\normalsfcodes\@empty
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\nofiles}
% \changes{v1.0k}{1994/11/04}
% {Added setting of \cs{protected@write},
% \cs{makeindex} and \cs{makeglossary} to \cs{nofiles}. ASAJ.}
% \changes{v1.0o}{1994/11/30}
% {There is no \cs{@gobblethree}\ldots}
% \changes{v1.0t}{1995/05/25}
% {(CAR) added \cs{long}}
% \changes{v1.1f}{1996/05/17}
% {added \cs{write} to \cs{protected@write} for latex/2146}
% Set |\@fileswfalse| which suppresses the places where \LaTeX\ makes
% |\immediate| writes. The |\makeindex| and |\makeglossary| are
% disabled. |\protected@write| is redefined not to write to the file
% specified, but rather to write a blank line to the log file. This
% ensures that a \meta{whatsit} node is still created, and so spacing
% is not affected by the |\nofiles| command; to ensure this more
% generally, the |\if@nobreak| test is needed.
% \changes{v1.1i}{1996/11/05}
% {Standard \cs{if@nobreak} test added}
% \begin{macrocode}
\def\nofiles{%
\@fileswfalse
\typeout{No auxiliary output files.^^J}%
\long\def\protected@write##1##2##3%
{\write\m@ne{}\if@nobreak\ifvmode\nobreak\fi\fi}%
\let\makeindex\relax
\let\makeglossary\relax}
\@onlypreamble\nofiles
% \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\protected@write}
% This takes three arguments: an output stream, some initialization
% code, and some text to write. It then writes this, with
% appropriate handling of |\protect| and |\thepage|.
% \changes{v1.0k}{1994/11/04}{Macro added ASAJ.}
% \changes{v1.0t}{1995/05/25}
% {(CAR) added \cs{long}}
% \begin{macrocode}
\long\def \protected@write#1#2#3{%
\begingroup
\let\thepage\relax
#2%
\let\protect\@unexpandable@protect
\edef\reserved@a{\write#1{#3}}%
\reserved@a
\endgroup
\if@nobreak\ifvmode\nobreak\fi\fi
}
% \end{macrocode}
% \end{macro}
%
% \begin{macrocode}
\let\@auxout=\@mainaux
% \end{macrocode}
%
%
% \begin{macro}{\include,\includeonly}
% \changes{v0.9p}{1994/01/18}
% {Use \cs{@input@} so include files are listed.}
% \changes{v1.0p}{1995/04/22}{Allow blanks in argument}
% \changes{v1.2a}{2019/07/01}{Support UTF-8}
% \changes{v1.2g}{2020/05/02}{Improved support for spaces in filenames
% (gh/217)}
%
% In the definition of |\include|, |\def\reserved@b| changed to
% |\edef\reserved@b| to be consistent with the |\edef| in
% |\includeonly|.
% (Suggested by Rainer Sch\"opf \& Frank Mittelbach.
% Change made 20 Jul 88.)
%
% Changed definition of |\include| to allow space at end of file name
% --- otherwise, typing |\include{foo }| would cause \LaTeX\ to
% overwrite |foo.tex|. Change made 24 May 89, suggested by Rainer
% Sch\"opf and Frank Mittelbach
%
% Made |\include| check for being used inside an |\include|'d file, as
% this will not work and cause surprising results.
% \changes{v1.2g}{2020/05/02}{Get rid of leading and trailing spaces
% from the filename (gh/217)}
% \changes{v1.2g}{2020-05-02}{Pass the filename to \cs{@include} by
% value instead of by reference (gh/217)}
%
% \begin{macrocode}
%</2ekernel>
%<*2ekernel|latexrelease>
%<latexrelease>\IncludeInRelease{2020/10/01}%
%<latexrelease> {\includeonly}{Spaces in file names}%
% \end{macrocode}
%
% \begin{macrocode}
\def\include#1{\relax
\ifnum\@auxout=\@partaux
\@latex@error{\string\include\space cannot be nested}\@eha
\else
% \end{macrocode}
% Here the normalization will add |.tex| for all files, (it uses
% the same normalization as the hooks), so we need to remove that
% manually. \cs{@strip@tex@ext} does that.
% \begin{macrocode}
\set@curr@file{#1}%
\edef\@curr@file{\@strip@tex@ext\@curr@file}%
% \end{macrocode}
% For historical reasons \cs{@include} expects an argument
% delimited by a space. This is kept (though unnecessary now) to avoid
% errors in other packages that use \cs{@include} directly.
% \begin{macrocode}
\expandafter\@include\expandafter{\@curr@file} % deliberate space
\fi}
% \end{macrocode}
%
% Here in \cs{includeonly} we also need to strip |.tex| after
% normalization:
% \begin{macrocode}
\def\includeonly#1{%
\@partswtrue
% \end{macrocode}
% Because the argument to |\includeonly| is a comma-separated list
% of filenames where there may be comma's preceding some of the
% filenames or trailing them. Therefore we need to take the list
% apart, remove the unwanted spaces while leaving the spaces
% \emph{in} the filenames intact.
% \begin{macrocode}
\let\@partlist\@empty
\@for\reserved@a:=#1 \do
{%
\expandafter\set@curr@file\expandafter{\reserved@a}%
\ifx\@partlist\@empty
\edef\@partlist{\@strip@tex@ext\@curr@file}%
\else
\edef\@partlist{\@partlist,\@strip@tex@ext\@curr@file}%
\fi
}%
}
\@onlypreamble\includeonly
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@strip@tex@ext,\@strip@tex@ext@aux}
% These macros take a (\cs{detokenize}d file name and remove any
% |.tex| extension). Extra care is taken to not remove the string
% |.tex| from the middle of a file name: it is only removed if it's
% the very last thing in the file name.
% \begin{macrocode}
\def\reserved@a#1{%
\def\@strip@tex@ext##1{%
\expandafter\@strip@tex@ext@aux
##1\@nil\@nil
#1\@nil\relax\@nnil}
\def\@strip@tex@ext@aux##1#1\@nil##2\@nnil{%
\ifx\relax##2\@empty
\expandafter\@cdr\expandafter\@empty\@cdr{}##1%
\else##1\fi}}%
\expandafter\reserved@a
\expandafter{\detokenize{.tex}}
%</2ekernel|latexrelease>
% \end{macrocode}
% \end{macro}
%
% \begin{macrocode}
%<latexrelease>\EndIncludeInRelease
%<latexrelease>\IncludeInRelease{2019/10/01}%
%<latexrelease> {\includeonly}{Spaces in file names}%
%<latexrelease>
%<latexrelease>\def\includeonly#1{%
%<latexrelease> \@partswtrue
%<latexrelease> \set@curr@file{\zap@space#1 \@empty}%
%<latexrelease> \let\@partlist\@curr@file
%<latexrelease> }
%<latexrelease>
%<latexrelease>\def\include#1{\relax
%<latexrelease> \ifnum\@auxout=\@partaux
%<latexrelease> \@latex@error{\string\include\space cannot be nested}\@eha
%<latexrelease> \else
%<latexrelease> \set@curr@file{#1 }%
%<latexrelease> \expandafter\@include\@curr@file
%<latexrelease> \fi}
%<latexrelease>
%<latexrelease>\let\@strip@tex@ext\@undefined
%<latexrelease>\let\@strip@tex@ext@aux\@undefined
%<latexrelease>
%<latexrelease>\EndIncludeInRelease
% \end{macrocode}
%
% \begin{macrocode}
%<latexrelease>\IncludeInRelease{0000/00/00}%
%<latexrelease> {\includeonly}{Spaces in file names}%
%<latexrelease>\def\includeonly#1{%
%<latexrelease> \@partswtrue
%<latexrelease> \edef\@partlist{\zap@space#1 \@empty}}
%<latexrelease>
%<latexrelease>\def\include#1{\relax
%<latexrelease> \ifnum\@auxout=\@partaux
%<latexrelease> \@latex@error{\string\include\space cannot be nested}\@eha
%<latexrelease> \else \@include#1 \fi}
%<latexrelease>
%<latexrelease>\EndIncludeInRelease
%<*2ekernel>
% \end{macrocode}
%
% \begin{macro}{\@include}
% \changes{v1.2g}{2020/05/02}{Support spaces in filenames by enclosing
% the names of \texttt{.aux}-files in quotes (gh/217)}
% \begin{macrocode}
%</2ekernel>
%<*2ekernel|latexrelease>
%<latexrelease>\IncludeInRelease{2022/06/01}%
%<latexrelease> {\@include}{Spaces in file names and hooks}%
% \end{macrocode}
%
% \changes{v1.2j}{2020/10/04}{Quotes around the aux file name removed,
% they are not needed and upset BibTeX (gh/400)}
% \changes{v1.2p}{2021/10/14}{Warn about use in preamble}
% \begin{macrocode}
\def\@include#1 {%
% \end{macrocode}
%
% \begin{macrocode}
\ifx\@nodocument\relax
% \end{macrocode}
%
% \begin{macrocode}
\clearpage
\if@filesw
\immediate\write\@mainaux{\string\@input{#1.aux}}%
\fi
\@tempswatrue
\if@partsw
\@tempswafalse
\edef\reserved@b{#1}%
\@for\reserved@a:=\@partlist\do
{\ifx\reserved@a\reserved@b\@tempswatrue\fi}%
\fi
\if@tempswa
\let\@auxout\@partaux
\if@filesw
\immediate\openout\@partaux "#1.aux"
\immediate\write\@partaux{\relax}%
\fi
% \end{macrocode}
% Now before going to the hooks we need to set \cs{CurrentFile}:
% \begin{macrocode}
%-----------------------------------------
\@filehook@set@CurrentFile
% \end{macrocode}
% Execute the \texttt{before} hooks just after we switched the
% \texttt{.aux} file \ldots
% \changes{v1.2n}{2021/07/23}{Make include/name/before a one-time hook}
% \changes{v1.2o}{2021/08/25}{Standardise generic hook names (gh/648)}
% \begin{macrocode}
\UseHook{include/before}%
\UseOneTimeHook{include/#1/before}%
%-----------------------------------------
\@input@{#1.tex}%
%-----------------------------------------
% \end{macrocode}
% \ldots{} then \texttt{end} hooks \ldots
% \changes{v1.2n}{2021/07/23}{Make include/name/end a one-time hook}
% \begin{macrocode}
\UseOneTimeHook{include/#1/end}%
\UseHook{include/end}%
%-----------------------------------------
\clearpage
%-----------------------------------------
% \end{macrocode}
% \ldots{} and after the \cs{clearpage} the \texttt{after} hooks
% followed by another \cs{clearpage} just in case new material got
% added (after all we need to be in well defined state after the
% \cs{include}).
% \changes{v1.2n}{2021/07/23}{Make include/name/after a one-time hook}
% \begin{macrocode}
\UseOneTimeHook{include/#1/after}%
\UseHook{include/after}%
\clearpage
%-----------------------------------------
\@writeckpt{#1}%
\if@filesw
\immediate\closeout\@partaux
\fi
\else
% \end{macrocode}
% If the file is not included, reset |\deadcycles|, so that a long
% list of non-included files does not generate an `Output loop'
% error.
% \changes{v1.1j}{1997/01/08}{reset \cs{deadcycles} latex/2365}
% \begin{macrocode}
\deadcycles\z@
\@nameuse{cp@#1}%
% \end{macrocode}
% We also execute a hook in this case, first a general used for
% every include file that is exclude and then a specific one that
% contains the name of the include file.
% \changes{v1.2q}{2022/04/01}{Process some hooks is an include file is bypassed}
% \begin{macrocode}
%-----------------------------------------
\UseHook{include/excluded}%
\UseOneTimeHook{include/#1/excluded}%
%-----------------------------------------
\fi
\let\@auxout\@mainaux
% \end{macrocode}
%
% \begin{macrocode}
\else
\@latex@warning{%
\noexpand\include should only be used after \string\begin{document}}%
\@input@{#1}%
\fi}
% \end{macrocode}
%
% \changes{v1.2o}{2021/08/25}{Declare non-generic include hooks}
% Now declare the non-generic \hook{include} hooks used above:
% \begin{macrocode}
\NewHook{include/before}
\NewReversedHook{include/end}
\NewReversedHook{include/after}
\NewHook{include/excluded}
%<latexrelease>\EndIncludeInRelease
%</2ekernel|latexrelease>
% \end{macrocode}
%
% \begin{macrocode}
%<latexrelease>\IncludeInRelease{2020/10/01}%
%<latexrelease> {\@include}{Spaces in file names and hooks}%
%<latexrelease>\EndIncludeInRelease
%<latexrelease>\def\@include#1 {%
%<latexrelease>\ifx\@nodocument\relax
%<latexrelease> \clearpage
%<latexrelease> \if@filesw
%<latexrelease> \immediate\write\@mainaux{\string\@input{#1.aux}}%
%<latexrelease> \fi
%<latexrelease> \@tempswatrue
%<latexrelease> \if@partsw
%<latexrelease> \@tempswafalse
%<latexrelease> \edef\reserved@b{#1}%
%<latexrelease> \@for\reserved@a:=\@partlist\do
%<latexrelease> {\ifx\reserved@a\reserved@b\@tempswatrue\fi}%
%<latexrelease> \fi
%<latexrelease> \if@tempswa
%<latexrelease> \let\@auxout\@partaux
%<latexrelease> \if@filesw
%<latexrelease> \immediate\openout\@partaux "#1.aux"
%<latexrelease> \immediate\write\@partaux{\relax}%
%<latexrelease> \fi
%<latexrelease> \@filehook@set@CurrentFile
%<latexrelease> \UseHook{include/before}%
%<latexrelease> \UseOneTimeHook{include/#1/before}%
%<latexrelease> \@input@{#1.tex}%
%<latexrelease> \UseOneTimeHook{include/#1/end}%
%<latexrelease> \UseHook{include/end}%
%<latexrelease> \clearpage
%<latexrelease> \UseOneTimeHook{include/#1/after}%
%<latexrelease> \UseHook{include/after}%
%<latexrelease> \clearpage
%<latexrelease> \@writeckpt{#1}%
%<latexrelease> \if@filesw
%<latexrelease> \immediate\closeout\@partaux
%<latexrelease> \fi
%<latexrelease> \else
%<latexrelease> \deadcycles\z@
%<latexrelease> \@nameuse{cp@#1}%
%<latexrelease> \fi
%<latexrelease> \let\@auxout\@mainaux
%<latexrelease>\else
%<latexrelease>\@latex@warning{%
%<latexrelease> \noexpand\include should only be used after \string\begin{document}}%
%<latexrelease>\@input@{#1}%
%<latexrelease>\fi}
%<latexrelease>\NewHook{include/before}
%<latexrelease>\NewReversedHook{include/end}
%<latexrelease>\NewReversedHook{include/after}
% \end{macrocode}
%
% \begin{macrocode}
%<latexrelease>\IncludeInRelease{0000/00/00}%
%<latexrelease> {\@include}{Spaces in file names and hooks}%
%<latexrelease>\def\@include#1 {%
%<latexrelease> \clearpage
%<latexrelease> \if@filesw
%<latexrelease> \immediate\write\@mainaux{\string\@input{#1.aux}}%
%<latexrelease> \fi
%<latexrelease> \@tempswatrue
%<latexrelease> \if@partsw
%<latexrelease> \@tempswafalse
%<latexrelease> \edef\reserved@b{#1}%
%<latexrelease> \@for\reserved@a:=\@partlist\do
%<latexrelease> {\ifx\reserved@a\reserved@b\@tempswatrue\fi}%