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Diffstat (limited to 'macros/generic')
| -rw-r--r-- | macros/generic/ltxcmds/README.md | 14 | ||||
| -rw-r--r-- | macros/generic/ltxcmds/ltxcmds.dtx | 2356 | ||||
| -rw-r--r-- | macros/generic/ltxcmds/ltxcmds.pdf | bin | 0 -> 397106 bytes |
3 files changed, 2370 insertions, 0 deletions
diff --git a/macros/generic/ltxcmds/README.md b/macros/generic/ltxcmds/README.md new file mode 100644 index 0000000000..2aef65aa3a --- /dev/null +++ b/macros/generic/ltxcmds/README.md @@ -0,0 +1,14 @@ +# ltxcmds package for latex + +Version: 2020-05-10 v1.25 + +The package ltxcmds exports some utility macros +from the LaTeX kernel into a separate namespace and +also provides them for other formats such as plain-TeX. + +## Copyright (C) +* 2007, 2009-2011 Heiko Oberdiek +* 2016-2020 Oberdiek Package Support Group + +## License +LATEX Project Public License, version 1.3c or later. diff --git a/macros/generic/ltxcmds/ltxcmds.dtx b/macros/generic/ltxcmds/ltxcmds.dtx new file mode 100644 index 0000000000..9940671d4d --- /dev/null +++ b/macros/generic/ltxcmds/ltxcmds.dtx @@ -0,0 +1,2356 @@ +% \iffalse meta-comment +% +% File: ltxcmds.dtx +% Version: 2020-05-10 v1.25 +% Info: LaTeX kernel commands for general use +% +% Copyright (C) +% 2009-2011 Heiko Oberdiek +% 2016-2020 Oberdiek Package Support Group +% https://github.com/ho-tex/ltxcmds/issues +% +% This work 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. This version of this license is in +% https://www.latex-project.org/lppl/lppl-1-3c.txt +% and the latest version of this license is in +% https://www.latex-project.org/lppl.txt +% and version 1.3 or later is part of all distributions of +% LaTeX version 2005/12/01 or later. +% +% This work has the LPPL maintenance status "maintained". +% +% The Current Maintainers of this work are +% Heiko Oberdiek and the Oberdiek Package Support Group +% https://github.com/ho-tex/ltxcmds/issues +% +% The Base Interpreter refers to any `TeX-Format', +% because some files are installed in TDS:tex/generic//. +% +% This work consists of the main source file ltxcmds.dtx +% and the derived files +% ltxcmds.sty, ltxcmds.pdf, ltxcmds.ins, ltxcmds.drv, +% ltxcmds-test1.tex, ltxcmds-test-gobble.tex, +% ltxcmds-test-ifempty.tex, ltxcmds-test-zapspace.tex, +% ltxcmds-test-ifboxempty.tex, ltxcmds-test-nextchar.tex, +% ltxcmds-test-carcdr.tex. +% +% Distribution: +% CTAN:macros/latex/contrib/ltxcmds/ltxcmds.dtx +% CTAN:macros/latex/contrib/ltxcmds/ltxcmds.pdf +% +% Unpacking: +% (a) If ltxcmds.ins is present: +% tex ltxcmds.ins +% (b) Without ltxcmds.ins: +% tex ltxcmds.dtx +% (c) If you insist on using LaTeX +% latex \let\install=y\input{ltxcmds.dtx} +% (quote the arguments according to the demands of your shell) +% +% Documentation: +% (a) If ltxcmds.drv is present: +% latex ltxcmds.drv +% (b) Without ltxcmds.drv: +% latex ltxcmds.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} +% +% Programm calls to get the documentation (example): +% pdflatex ltxcmds.dtx +% makeindex -s gind.ist ltxcmds.idx +% pdflatex ltxcmds.dtx +% makeindex -s gind.ist ltxcmds.idx +% pdflatex ltxcmds.dtx +% +% Installation: +% TDS:tex/generic/ltxcmds/ltxcmds.sty +% TDS:doc/latex/ltxcmds/ltxcmds.pdf +% TDS:source/latex/ltxcmds/ltxcmds.dtx +% +%<*ignore> +\begingroup + \catcode123=1 % + \catcode125=2 % + \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 +\Msg{************************************************************************} +\Msg{* Installation} +\Msg{* Package: ltxcmds 2020-05-10 v1.25 LaTeX kernel commands for general use (HO)} +\Msg{************************************************************************} + +\keepsilent +\askforoverwritefalse + +\let\MetaPrefix\relax +\preamble + +This is a generated file. + +Project: ltxcmds +Version: 2020-05-10 v1.25 + +Copyright (C) + 2009-2011 Heiko Oberdiek + 2016-2020 Oberdiek Package Support Group + +This work 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. This version of this license is in + https://www.latex-project.org/lppl/lppl-1-3c.txt +and the latest version of this license is in + https://www.latex-project.org/lppl.txt +and version 1.3 or later is part of all distributions of +LaTeX version 2005/12/01 or later. + +This work has the LPPL maintenance status "maintained". + +The Current Maintainers of this work are +Heiko Oberdiek and the Oberdiek Package Support Group +https://github.com/ho-tex/ltxcmds/issues + + +The Base Interpreter refers to any `TeX-Format', +because some files are installed in TDS:tex/generic//. + +This work consists of the main source file ltxcmds.dtx +and the derived files + ltxcmds.sty, ltxcmds.pdf, ltxcmds.ins, ltxcmds.drv, + ltxcmds-test1.tex, ltxcmds-test-gobble.tex, + ltxcmds-test-ifempty.tex, ltxcmds-test-zapspace.tex, + ltxcmds-test-ifboxempty.tex, ltxcmds-test-nextchar.tex, + ltxcmds-test-carcdr.tex. + +\endpreamble +\let\MetaPrefix\DoubleperCent + +\generate{% + \file{ltxcmds.ins}{\from{ltxcmds.dtx}{install}}% + \file{ltxcmds.drv}{\from{ltxcmds.dtx}{driver}}% + \usedir{tex/generic/ltxcmds}% + \file{ltxcmds.sty}{\from{ltxcmds.dtx}{package}}% +} + +\catcode32=13\relax% active space +\let =\space% +\Msg{************************************************************************} +\Msg{*} +\Msg{* To finish the installation you have to move the following} +\Msg{* file into a directory searched by TeX:} +\Msg{*} +\Msg{* ltxcmds.sty} +\Msg{*} +\Msg{* To produce the documentation run the file `ltxcmds.drv'} +\Msg{* through LaTeX.} +\Msg{*} +\Msg{* Happy TeXing!} +\Msg{*} +\Msg{************************************************************************} + +\endbatchfile +%</install> +%<*ignore> +\fi +%</ignore> +%<*driver> +\NeedsTeXFormat{LaTeX2e} +\ProvidesFile{ltxcmds.drv}% + [2020-05-10 v1.25 LaTeX kernel commands for general use (HO)]% +\documentclass{ltxdoc} +\usepackage{holtxdoc}[2011/11/22] +\usepackage{zref-savepos} +\usepackage{paralist} +\hfuzz=1pt +\begin{document} + \DocInput{ltxcmds.dtx}% +\end{document} +%</driver> +% \fi +% +% +% +% \GetFileInfo{ltxcmds.drv} +% +% \title{The \xpackage{ltxcmds} package} +% \date{2020-05-10 v1.25} +% \author{Heiko Oberdiek\thanks +% {Please report any issues at \url{https://github.com/ho-tex/ltxcmds/issues}}} +% +% \maketitle +% +% \begin{abstract} +% The package \xpackage{ltxcmds} exports some utility macros +% from the \LaTeX\ kernel into a separate namespace and +% also provides them for other formats such as plain-\TeX. +% \end{abstract} +% +% \tableofcontents +% +% \newcounter{to} +% \renewcommand*{\theto}{to\arabic{to}} +% \newlength\tolength +% \tolength=\dimexpr .5\linewidth+\oddsidemargin+1in+15mm\relax +% \newcommand*{\TO}{^^A +% \quad +% \stepcounter{to}^^A +% \zsavepos\theto +% \ifdim\zposx\theto sp>0pt +% \ifdim\zposx\theto sp<\tolength +% \kern\dimexpr\tolength-\zposx\theto sp\relax +% \fi +% \fi +% $\rightarrow$\quad +% \ignorespaces +% } +% +% \section{Documentation} +% +% \subsection{Introduction} +% +% Many of my packages also support other formats such as plain-\TeX. +% Because I am rather familiar with the utility macros from +% \LaTeX's kernel (e.g. \cs{@gobble}, \cs{@firstoftwo}), I found +% myself rewriting them again and again, because they are lacking +% in plain-\TeX. +% +% Therefore this package provides often used macros and similar +% ones with the name prefix \cs{ltx@}. This avoids also faulty +% redefinitions. I remember an example where a package redefined +% \cs{@firstoftwo} with forgetting \cs{long}. +% +% \subsection{Numbers} +% +% \begin{declcs}{ltx@zero} \TO 0\\ +% \cs{ltx@one} \TO 1\\ +% \cs{ltx@two} \TO 2\\ +% \cs{ltx@cclv} \TO 255\\ +% \cs{ltx@minusone} \TO -1 +% \end{declcs} +% These commands are numbers 0, 1, 2, 255 and -1. They are not digits +% and a space is not gobbled afterwards. Macro \cs{ltx@minusone} +% is available since version 2010/12/12 v1.15. +% +% \subsection{Scratch registers} +% +% Following the conventions of \hologo{plainTeX} and \hologo{LaTeX} +% the first ten registers are free to use. Even numbered registers +% are for local, odd numbered for global use. +% +% \begin{declcs}{ltx@(Loc,Glob)(Toks,Dimen,Skip)(A,B,C,D,E)} +% \end{declcs} +% The name consists of the prefix \cs{ltx@}, then +% \texttt{Loc} or \texttt{Glob} for local or global usage follows. +% The register type is given by \texttt{Toks} for token register, +% \texttt{Dimen} for dimen register and \texttt{Skip} for skip +% register. As last part the registers are numbered from \texttt{A} +% to \texttt{E}. Example: \cs{ltx@LocToksA}. +% +% Since 2011/04/14 v1.19. +% +% \subsection{Argument killers} +% +% \begin{declcs}{ltx@gobble} \M{1} \TO\\ +% \cs{ltx@gobbletwo} \M{1} \M{2} \TO\\ +% \cs{ltx@gobblethree} \M{1} \M{2} \M{3} \TO\\ +% \cs{ltx@gobblefour} \M{1} \M{2} \M{3} \M{4} \TO +% \end{declcs} +% +% \begin{declcs}{ltx@GobbleNum} \M{num} \M{1} \M{2} \dots\space +% \M{\meta{num}} \TO +% \end{declcs} +% The first argument \meta{num} of macro \cs{ltx@GobbleNum} specifies, +% how many following arguments are eaten. Macro \cs{ltx@GobbleNum} +% is expandable in exact two expansion steps. +% +% \subsection{Argument grabbers} +% +% \begin{declcs}{ltx@firstofone} \M{1} \TO \meta{1}\\[1ex] +% \cs{ltx@firstoftwo} \M{1} \M{2} \TO \meta{1}\\ +% \cs{ltx@secondoftwo} \M{1} \M{2} \TO \meta{2}\\[1ex] +% \cs{ltx@firstofthree} \M{1} \M{2} \M{3} \TO \meta{1}\\ +% \cs{ltx@secondofthree} \M{1} \M{2} \M{3} \TO \meta{2}\\ +% \cs{ltx@thirdofthree} \M{1} \M{2} \M{3} \TO \meta{3}\\ +% \cs{ltx@firstoffour} \M{1} \M{2} \M{3} \M{4} \TO \meta{1}\\ +% \cs{ltx@secondoffour} \M{1} \M{2} \M{3} \M{4} \TO \meta{2}\\ +% \cs{ltx@thirdoffour} \M{1} \M{2} \M{3} \M{4} \TO \meta{3}\\ +% \cs{ltx@fourthoffour} \M{1} \M{2} \M{3} \M{4} \TO \meta{4} +% \end{declcs} +% Macros \cs{ltx@firstofthree}, \cs{ltx@secondofthree} +% and \cs{ltx@thirdofthree} were added in version +% 2010/11/12 v1.11. +% Macros \cs{ltx@firstoffour}, \dots, \cs{ltx@fourthoffour} +% were added in version 2011/02/04 v1.16. +% +% \subsection{List helpers} +% +% \begin{declcs}{ltx@carzero} \dots\ \cs{@nil} \TO\\ +% \cs{ltx@cdrzero} \dots\ \cs{@nil} \TO \dots +% \end{declcs} +% +% \begin{declcs}{ltx@car} \M{1} \dots\ \cs{@nil} \TO \meta{1}\\ +% \cs{ltx@cdr} \M{1} \dots\ \cs{@nil} \TO \dots +% \end{declcs} +% +% \begin{declcs}{ltx@cartwo} \M{1} \M{2} \dots\ \cs{@nil} +% \TO \meta{1}\meta{2}\\ +% \cs{ltx@carsecond} \M{1} \M{2} \dots\ \cs{@nil} \TO \meta{2}\\ +% \cs{ltx@cdrtwo} \M{1} \M{2} \dots\ \cs{@nil} \TO \dots +% \end{declcs} +% +% \begin{declcs}{ltx@carthree} \M{1} \M{2} \M{3} \dots\ \cs{@nil} +% \TO \meta{1}\meta{2}\meta{3}\\ +% \cs{ltx@carthird} \M{1} \M{2} \M{3} \dots\ \cs{@nil} +% \TO \meta{3}\\ +% \cs{ltx@cdrthree} \M{1} \M{2} \M{3} \dots\ \cs{@nil} \TO \dots +% \end{declcs} +% +% \begin{declcs}{ltx@carfour} \M{1} \M{2} \M{3} \M{4} \dots\ \cs{@nil} +% \TO \meta{1}\meta{2}\meta{3}\meta{4}\\ +% \cs{ltx@carfourth} \M{1} \M{2} \M{3} \M{4} \dots\ \cs{@nil} +% \TO \meta{4}\\ +% \cs{ltx@cdrfour} \M{1} \M{2} \M{3} \M{4} \dots\ \cs{@nil} \TO \dots +% \end{declcs} +% +% \begin{declcs}{ltx@CarNum} \M{num} \M{1} \dots\ \M{\meta{num}} +% \M{\meta{num}+1} \dots\ \cs{@nil}\\ +% \TO \M{1} \dots\ \M{\meta{num}} \dots\\ +% \cs{ltx@CarNumth} \M{num} \M{1} \dots\ \M{\meta{num}} +% \M{\meta{num}+1} \dots\ \cs{@nil}\\ +% \TO \M{\meta{num}} \dots\\ +% \cs{ltx@CdrNum} \M{num} \M{1} \dots\ \M{\meta{num}} +% \M{\meta{num}+1} \dots\ \cs{@nil}\\ +% \TO \M{\meta{num}+1} \dots +% \end{declcs} +% +% Macros with uppercase letters are expandable in two expansion steps. +% Changes in version 2020-05-10 v1.25: +% \begin{itemize} +% \item +% Macros \cs{ltx@carsecond}, \cs{ltx@carthird}, \cs{ltx@carfourth}, +% \cs{ltx@CarNumth} added. +% \item +% Macros \cs{ltx@cdr}, \cs{ltx@cdrtwo}, \cs{ltx@cdrthree}, \cs{ltx@cdrfour}, +% \cs{ltx@CdrNum} are expandable in two expansion steps and retain +% spaces and braces after the first gobbled arguments. +% \end{itemize} +% +% \subsection{Tail recursion} +% +% \begin{declcs}{ltx@ReturnAfterFi} \M{1} \cs{fi} \TO \cs{fi} \meta{1}\\ +% \cs{ltx@ReturnAfterElseFi} \M{1} \cs{else} \M{2} \cs{fi} +% \TO \cs{fi} \meta{1} +% \end{declcs} +% +% \subsection{Empty macro} +% +% \begin{declcs}{ltx@empty} \TO +% \end{declcs} +% +% \subsection{Characters} +% +% \begin{declcs}{ltx@space} \TO \verb*| |\\ +% \cs{ltx@percentchar} \TO \texttt{\%}\\ +% \cs{ltx@backslashchar} \TO +% \makeatletter\texttt{\@backslashchar}\\ +% \cs{ltx@hashchar} \TO \texttt{\#}\qquad(since v1.7)\\ +% \cs{ltx@leftbracechar} \TO \texttt{\textbraceleft}\qquad(since v1.8)\\ +% \cs{ltx@rightbracechar} \TO \texttt{\textbraceright}\qquad(since v1.8) +% \end{declcs} +% +% \subsection{Boolean switch} +% +% \begin{declcs}{ltx@newif} \M{cmd} +% \end{declcs} +% \cs{ltx@newif} defines a new boolean switch \meta{cmd} like \cs{newif}. +% Unlike \plainTeX's \cs{newif}, \cs{ltx@newif} is not \cs{outer}. +% The command \meta{cmd} must start with the two characters |if|. +% +% \begin{declcs}{ltx@newglobalif} \M{cmd} +% \end{declcs} +% \cs{ltx@newglobalif} defines a new boolean switch \meta{cmd} +% like \cs{ltx@newif}. However the switch setting commands, +% \meta{cmd} without the prefix |if| and followed by |true| or |false| +% are acting globally. +% +% \subsection{Command definitions} +% +% \begin{declcs}{ltx@ifundefined} \M{cmd} \M{yes} \M{no} +% \end{declcs} +% If \eTeX\ is available, \cs{ifcsname} is used that does +% not have the side effect of defining undefined commands +% with meaning of \cs{relax}. This command is always expandable. +% Change in version 1.1: Also the meaning \cs{relax} is +% always considered ``undefined''. +% +% \begin{declcs}{ltx@IfUndefined} \M{cmd} \M{yes} \M{no} +% \end{declcs} +% If \eTeX\ is available, \cs{ifcsname} is used that does +% not have the side effect of defining undefined commands +% with meaning of \cs{relax}. Also it always checks for +% the meaning of \cs{relax} and considers this as undefined. +% This macro is not expandable without \eTeX. +% +% \begin{declcs}{ltx@LocalExpandAfter} +% \end{declcs} +% It expands the token after the next token but in a local +% context. That is the difference to \cs{expandafter}. +% The local context discards the side effect of \cs{csname} +% and let the command undefined after the expansion step. +% +% \subsection{Stripping} +% +% \begin{declcs}{ltx@RemovePrefix}\\ +% \cs{ltx@StripPrefix} +% \end{declcs} +% All tokens up to and including the next available character +% `\textgreater' are thrown away. Usually it is used to strip +% the first part of the output of the commands \cs{meaning} +% or \cs{pdflastmatch}. Macro \cs{ltx@RemovePrefix} +% has the same meaning as \LaTeX's \cs{strip@prefix}, whereas +% macro \cs{ltx@StripPrefix} expands the next token +% once before stripping the prefix. +% +% \begin{declcs}{ltx@onelevel@sanitize} \M{macro} +% \end{declcs} +% Macro \cs{ltx@onelevel@sanitize} provides \hologo{LaTeX}'s +% \cs{@onelevel@sanitize}. The macro is expanded once and +% the contents is converted to characters with catcode 12 (other) +% and space tokens with catcode 10 (space). Then then sanitized +% contents is stored into the macro again. Since version 1.12. +% +% \subsection{File management} +% +% All macros in this section are expandable like +% the counterparts of the \LaTeX\ kernel. Also they +% can be used after the preamble. +% +% \subsubsection{File extensions} +% +% \begin{declcs}{ltx@clsextension}\\ +% \cs{ltx@pkgextension} +% \end{declcs} +% Macros \cs{ltx@clsextension} and \cs{ltx@styextension} +% stores the strings |cls| and |sty|. In opposite to \hologo{LaTeX}'s +% \cs{@clsextension} and \cs{@styextension} they can also be +% used after |\begin{document}|. +% +% \subsubsection{Load check} +% +% \begin{declcs}{ltx@ifclassloaded} \M{class} \M{yes} \M{no}\\ +% \cs{ltx@ifpackageloaded} \M{package} \M{yes} \M{no} +% \end{declcs} +% Macros \cs{ltx@ifclassloaded}\slash\cs{ltx@ifpackageloaded} +% execute \meta{yes}, if the \meta{class} or \meta{package} is loaded, +% otherwise \meta{no} is called. +% Both \meta{class} and \meta{package} are specified without +% extension. The macros can also be used after |\begin{document}|. +% +% \begin{declcs}{ltx@iffileloaded} \M{file} \M{yes} \M{no} +% \end{declcs} +% If \LaTeX's \cs{ProvidesFile} macro was called before +% using \meta{file} as argument, then \cs{ltx@iffileloaded} +% calls \meta{yes}, otherwise \meta{no}. +% Therefore it is possible +% that the \meta{file} is loaded, but \meta{no} is executed because +% of a missing \cs{ProvidesFile}. The \LaTeX\ kernel does not have +% a counterpart of \cs{ltx@iffileloaded}. +% +% Note that the file name used in \cs{ProvidesFile} and +% \cs{ltx@iffileloaded} must match. For example, if \TeX's +% default extension \xext{tex} was given in the first command, +% then it must also specified in the latter command and vice versa. +% +% \subsubsection{Version date check} +% +% \begin{declcs}{ltx@ifclasslater} \M{class} \M{date} \M{yes} \M{no}\\ +% \cs{ltx@ifpackagelater} \M{package} \M{date} \M{yes} \M{no}\\ +% \cs{ltx@iffilelater} \M{file} \M{date} \M{yes} \M{no} +% \end{declcs} +% If a \cs{ProvidesClass}\slash\cs{ProvidesPackage}\slash +% \cs{ProvidesFile} command with exact the same class\slash package\slash +% file was executed before with an optional +% argument that starts with a \LaTeX\ version date, then +% this version date is compared with the argument \meta{date}. +% If they are equal or if the version date is the later date, +% then \meta{yes} is called. In all other cases \meta{no} is executed. +% +% A \LaTeX\ date has the format |YYYY/MM/DD| with |YYYY| as year +% with four digits, |MM| as month with two digits and |DD| as day +% with two digits. If \pdfTeX's \cs{pdfmatch} is available, then +% it is used to detect the version date, to reject invalid +% date formats and to reject some invalid dates. +% Dates before 1994/01/01 are always invalid, because version +% dates are introduced with \LaTeXe\ in 1994. +% +% \subsection{Macro additions} +% +% \begin{declcs}{ltx@GlobalAppendToMacro} \M{cmd} \M{addition}\\ +% \cs{ltx@LocalAppendToMacro} \M{cmd} \M{addition} +% \end{declcs} +% The \meta{addition} is appended to the parameterless macro \meta{cmd}. +% If \meta{cmd} is undefined or has the meaning \cs{relax}, then +% it will be initialized as empty macro beforehand. Due to a bug \meta{addition} +% must not contain \cs{par} before version 2010/10/25 v1.9. +% +% \begin{declcs}{ltx@GlobalPrependToMacro} \M{cmd} \M{addition}\\ +% \cs{ltx@LocalPrependToMacro} \M{cmd} \M{addition} +% \end{declcs} +% The \meta{addition} is prepended to the parameterless macro \meta{cmd}. +% If \meta{cmd} is undefined or has the meaning \cs{relax}, then +% it will be initialized as empty macro beforehand. The macros +% were added in version 2011/08/22 v1.21. +% +% \subsection{Next character detection} +% +% \begin{declcs}{ltx@ifnextchar} \M{char} \M{yes} \M{no} +% \end{declcs} +% If next character is \meta{char} then \meta{yes} is called, +% otherwise \meta{no}. The character is not removed. +% Spaces are silently removed when looking for \meta{char} +% as \hologo{LaTeX}'s version \cs{kernel@ifnextchar} does. +% But there are also small differences: +% \begin{itemize} +% \item The space can be used as \meta{char}. In this case +% optional spaces before \meta{char} are not supported of course. +% \item If the optional space is a command that is a character +% (defined by \cs{let} or \cs{futurelet}), then +% \cs{kernel@ifnextchar} breaks with an \hologo{TeX} error. +% \cs{ltx@ifnextchar} silently removes this token as +% optional space. +% \end{itemize} +% Since 2010/03/01 v1.3. +% +% \begin{declcs}{ltx@ifnextchar@nospace} \M{char} \M{yes} \M{no} +% \end{declcs} +% Macro \cs{ltx@ifnextchar@nospace} behaves like +% macro \cs{ltx@ifnextchar} with the exception that +% optional spaces are not supported before \meta{char}. +% Since 2011/04/14 v1.19. +% +% \subsection{\cs{ltx@leavevmode}, \cs{ltx@mbox}} +% +% \begin{declcs}{ltx@leavevmode} +% \end{declcs} +% Macro \cs{ltx@leavevmode} calls \hologo{pdfTeX}'s \cs{quitvmode}. +% Otherwise \cs{leavevmode} is used and defined if it is necessary. +% +% \begin{declcs}{ltx@mbox} +% \end{declcs} +% Macro \cs{ltx@mbox} reimplements \cs{mbox} with two changes. +% Instead of \cs{leavevmode} it uses \cs{ltx@leavevmode} and +% stops right after \cs{hbox}. Especially it does not grab +% the argument and allows the extended syntax of \cs{hbox}. +% +% \subsection{Expandable test for emptiness} +% +% \begin{declcs}{ltx@ifempty} \M{stuff} \M{yes} \M{no} +% \end{declcs} +% Macro \cs{ltx@ifempty} checks in exact two expansion steps +% whether \meta{stuff} +% is empty or contains token. Depending on the result +% \meta{yes} or \meta{no} is executed. The token in \meta{stuff} +% may contain \cs{par} and unmatched conditionals (\cs{if}, \cs{else}, +% \cs{fi}, \dots). Since version 2010/11/12 v1.11. +% +% \begin{declcs}{ltx@ifblank} \M{stuff} \M{yes} \M{no} +% \end{declcs} +% Macro \cs{ltx@ifblank} tests in exact two expansion steps +% if \meta{stuff} is empty or contain only blank spaces. +% In this case argument \meta{yes} is called. If \meta{stuff} +% contains other tokens than spaces then \meta{no} is executed. +% Since version 2010/12/04 v1.13. +% +% \subsection{Stripping spaces} +% +% \begin{declcs}{ltx@zapspace} \M{stuff} +% \end{declcs} +% Macro \cs{ltx@zapspace} strips spaces from \meta{stuff} +% that are not hidden inside curly braces. Like \hologo{LaTeX}'s +% \cs{zap@space} it is expandable. Differences: +% \begin{itemize} +% \item +% Syntax: \cs{zap@space} also expects a space token +% and \cs{@empty} after \meta{stuff}. +% \item +% Macro \cs{ltx@zapspace} is expandable in exact two +% expansion steps. +% \item +% Macro \cs{ltx@zapspace} always retains curly braces. +% \item +% Macro \cs{zap@space} has a bug. It stops stripping spaces +% after a token group in curly braces if the first two tokens +% inside the group are equal. +% \item +% Macro \cs{ltx@zapspace} also works with \cs{par} +% and conditionals (\cs{if}, \cs{else}, \cs{fi}, \dots). +% \end{itemize} +% Macro \cs{ltx@zapspace} is available since version +% 2010/12/07 v1.14. +% +% \subsection{Check for emptiness of boxes} +% +% \begin{declcs}{ltx@IfBoxEmpty} \M{box register number} +% \M{yes} \M{no} +% \end{declcs} +% Macro \cs{ltx@IfBoxEmpty} calls \meta{yes} if +% the box exists (\cs{ifvoid} returns false) and the box +% does not contain any content. Otherwise if the box +% is void or contains something, then \meta{no} is executed. +% Thus being empty means that the box exists and is either +% an \cs{hbox} or a \cs{vbox} and may even have dimensions other than +% 0.0\,pt, but the box does not contain anything. +% Macro \cs{ltx@IfBoxEmpty} is available since 2010/02/04 v1.16. +% +% \begin{declcs}{ltx@IfBoxVoidOrEmpty} \M{box register number} +% \M{yes} \M{no} +% \end{declcs} +% Macro \cs{ltx@IfBoxVoidOrEmpty} calls \meta{yes} if +% the box is either void or does not contain any content. +% Otherwise \meta{no} is executed. +% Macro \cs{ltx@IfBoxVoidOrEmpty} is available since 2010/02/04 v1.16. +% +% \StopEventually{ +% } +% +% \section{Implementation} +% +% \subsection{Identification} +% +% \begin{macrocode} +%<*package> +% \end{macrocode} +% Reload check, especially if the package is not used with \LaTeX. +% \begin{macrocode} +\begingroup\catcode61\catcode48\catcode32=10\relax% + \catcode13=5 % ^^M + \endlinechar=13 % + \catcode35=6 % # + \catcode39=12 % ' + \catcode44=12 % , + \catcode45=12 % - + \catcode46=12 % . + \catcode58=12 % : + \catcode64=11 % @ + \catcode123=1 % { + \catcode125=2 % } + \expandafter\let\expandafter\x\csname ver@ltxcmds.sty\endcsname + \ifx\x\relax % plain-TeX, first loading + \else + \def\empty{}% + \ifx\x\empty % LaTeX, first loading, + % variable is initialized, but \ProvidesPackage not yet seen + \else + \expandafter\ifx\csname PackageInfo\endcsname\relax + \def\x#1#2{% + \immediate\write-1{Package #1 Info: #2.}% + }% + \else + \def\x#1#2{\PackageInfo{#1}{#2, stopped}}% + \fi + \x{ltxcmds}{The package is already loaded}% + \aftergroup\endinput + \fi + \fi +\endgroup% +% \end{macrocode} +% Package identification: +% \begin{macrocode} +\begingroup\catcode61\catcode48\catcode32=10\relax% + \catcode13=5 % ^^M + \endlinechar=13 % + \catcode35=6 % # + \catcode39=12 % ' + \catcode40=12 % ( + \catcode41=12 % ) + \catcode44=12 % , + \catcode45=12 % - + \catcode46=12 % . + \catcode47=12 % / + \catcode58=12 % : + \catcode64=11 % @ + \catcode91=12 % [ + \catcode93=12 % ] + \catcode123=1 % { + \catcode125=2 % } + \expandafter\ifx\csname ProvidesPackage\endcsname\relax + \def\x#1#2#3[#4]{\endgroup + \immediate\write-1{Package: #3 #4}% + \xdef#1{#4}% + }% + \else + \def\x#1#2[#3]{\endgroup + #2[{#3}]% + \ifx#1\@undefined + \xdef#1{#3}% + \fi + \ifx#1\relax + \xdef#1{#3}% + \fi + }% + \fi +\expandafter\x\csname ver@ltxcmds.sty\endcsname +\ProvidesPackage{ltxcmds}% + [2020-05-10 v1.25 LaTeX kernel commands for general use (HO)]% +% \end{macrocode} +% +% \begin{macrocode} +\begingroup\catcode61\catcode48\catcode32=10\relax% + \catcode13=5 % ^^M + \endlinechar=13 % + \catcode123=1 % { + \catcode125=2 % } + \catcode64=11 % @ + \def\x{\endgroup + \expandafter\edef\csname LTXcmds@AtEnd\endcsname{% + \endlinechar=\the\endlinechar\relax + \catcode13=\the\catcode13\relax + \catcode32=\the\catcode32\relax + \catcode35=\the\catcode35\relax + \catcode61=\the\catcode61\relax + \catcode64=\the\catcode64\relax + \catcode123=\the\catcode123\relax + \catcode125=\the\catcode125\relax + }% + }% +\x\catcode61\catcode48\catcode32=10\relax% +\catcode13=5 % ^^M +\endlinechar=13 % +\catcode35=6 % # +\catcode64=11 % @ +\catcode123=1 % { +\catcode125=2 % } +\def\TMP@EnsureCode#1#2{% + \edef\LTXcmds@AtEnd{% + \LTXcmds@AtEnd + \catcode#1=\the\catcode#1\relax + }% + \catcode#1=#2\relax +} +\TMP@EnsureCode{36}{3}% $ +\TMP@EnsureCode{38}{4}% & +\TMP@EnsureCode{40}{12}% ( +\TMP@EnsureCode{41}{12}% ) +\TMP@EnsureCode{45}{12}% - +\TMP@EnsureCode{46}{12}% . +\TMP@EnsureCode{47}{12}% / +\TMP@EnsureCode{60}{12}% < +\TMP@EnsureCode{62}{12}% > +\TMP@EnsureCode{91}{12}% [ +\TMP@EnsureCode{96}{12}% ` +\TMP@EnsureCode{93}{12}% ] +\TMP@EnsureCode{94}{12}% ^ (superscript) (!) +\TMP@EnsureCode{124}{12}% | +\edef\LTXcmds@AtEnd{\LTXcmds@AtEnd\noexpand\endinput} +% \end{macrocode} +% +% \subsection{Numbers} +% +% \begin{macro}{\ltx@zero} +% \begin{macrocode} +\chardef\ltx@zero=0 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@one} +% \begin{macrocode} +\chardef\ltx@one=1 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@two} +% \begin{macrocode} +\chardef\ltx@two=2 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@active} +% \begin{macrocode} +\chardef\ltx@active=13 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@cclv} +% \begin{macrocode} +\chardef\ltx@cclv=255 % +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@minusone} +% \begin{macrocode} +\def\ltx@minusone{% + -\ltx@one +} +% \end{macrocode} +% \end{macro} +% +% \subsection{Scratch registers} +% +% \begin{macro}{\ltx@LocToksA} +% \begin{macrocode} +\toksdef\ltx@LocToksA=0 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocToksB} +% \begin{macrocode} +\toksdef\ltx@LocToksB=2 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocToksC} +% \begin{macrocode} +\toksdef\ltx@LocToksC=4 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocToksD} +% \begin{macrocode} +\toksdef\ltx@LocToksD=6 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocToksE} +% \begin{macrocode} +\toksdef\ltx@LocToksE=8 % +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@GlobToksA} +% \begin{macrocode} +\toksdef\ltx@GlobToksA=1 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@GlobToksB} +% \begin{macrocode} +\toksdef\ltx@GlobToksB=3 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@GlobToksC} +% \begin{macrocode} +\toksdef\ltx@GlobToksC=5 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@GlobToksD} +% \begin{macrocode} +\toksdef\ltx@GlobToksD=7 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@GlobToksE} +% \begin{macrocode} +\toksdef\ltx@GlobToksE=9 % +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@LocDimenA} +% \begin{macrocode} +\dimendef\ltx@LocDimenA=0 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocDimenB} +% \begin{macrocode} +\dimendef\ltx@LocDimenB=2 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocDimenC} +% \begin{macrocode} +\dimendef\ltx@LocDimenC=4 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocDimenD} +% \begin{macrocode} +\dimendef\ltx@LocDimenD=6 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocDimenE} +% \begin{macrocode} +\dimendef\ltx@LocDimenE=8 % +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@GlobDimenA} +% \begin{macrocode} +\dimendef\ltx@GlobDimenA=1 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@GlobDimenB} +% \begin{macrocode} +\dimendef\ltx@GlobDimenB=3 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@GlobDimenC} +% \begin{macrocode} +\dimendef\ltx@GlobDimenC=5 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@GlobDimenD} +% \begin{macrocode} +\dimendef\ltx@GlobDimenD=7 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@GlobDimenE} +% \begin{macrocode} +\dimendef\ltx@GlobDimenE=9 % +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@LocSkipA} +% \begin{macrocode} +\skipdef\ltx@LocSkipA=0 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocSkipB} +% \begin{macrocode} +\skipdef\ltx@LocSkipB=2 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocSkipC} +% \begin{macrocode} +\skipdef\ltx@LocSkipC=4 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocSkipD} +% \begin{macrocode} +\skipdef\ltx@LocSkipD=6 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocSkipE} +% \begin{macrocode} +\skipdef\ltx@LocSkipE=8 % +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@GlobSkipA} +% \begin{macrocode} +\skipdef\ltx@GlobSkipA=1 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@GlobSkipB} +% \begin{macrocode} +\skipdef\ltx@GlobSkipB=3 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@GlobSkipC} +% \begin{macrocode} +\skipdef\ltx@GlobSkipC=5 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@GlobSkipD} +% \begin{macrocode} +\skipdef\ltx@GlobSkipD=7 % +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@GlobSkipE} +% \begin{macrocode} +\skipdef\ltx@GlobSkipE=9 % +% \end{macrocode} +% \end{macro} +% +% +% \subsection{Argument killers} +% +% \begin{macro}{\ltx@gobble} +% \begin{macrocode} +\long\def\ltx@gobble#1{} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@gobbletwo} +% \begin{macrocode} +\long\def\ltx@gobbletwo#1#2{} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@gobblethree} +% \begin{macrocode} +\long\def\ltx@gobblethree#1#2#3{} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@gobblefour} +% \begin{macrocode} +\long\def\ltx@gobblefour#1#2#3#4{} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@GobbleNum} +% \begin{macrocode} +\def\ltx@GobbleNum#1{% + \romannumeral + \csname ltx@zero% + \expandafter\LTXcmds@GobbleNum + \romannumeral\LTXcmds@num{#1}000{m\endcsname}% +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@GobbleNum} +% \begin{macrocode} +\def\LTXcmds@GobbleNum#1{% + \csname LTXcmds@G#1\LTXcmds@GobbleNum +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@Gm} +% \begin{macrocode} +\long\def\LTXcmds@Gm#1{% + \endcsname +} +% \end{macrocode} +% \end{macro} +% +% \subsection{Argument grabbers} +% +% \begin{macro}{\ltx@firstofone} +% \begin{macrocode} +\long\def\ltx@firstofone#1{#1} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@firstoftwo} +% \begin{macrocode} +\long\def\ltx@firstoftwo#1#2{#1} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@secondoftwo} +% \begin{macrocode} +\long\def\ltx@secondoftwo#1#2{#2} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@firstofthree} +% \begin{macrocode} +\long\def\ltx@firstofthree#1#2#3{#1} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@secondofthree} +% \begin{macrocode} +\long\def\ltx@secondofthree#1#2#3{#2} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@thirdofthree} +% \begin{macrocode} +\long\def\ltx@thirdofthree#1#2#3{#3}% +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@firstoffour} +% \begin{macrocode} +\long\def\ltx@firstoffour#1#2#3#4{#1} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@secondoffour} +% \begin{macrocode} +\long\def\ltx@secondoffour#1#2#3#4{#2} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@thirdoffour} +% \begin{macrocode} +\long\def\ltx@thirdoffour#1#2#3#4{#3}% +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@fourthoffour} +% \begin{macrocode} +\long\def\ltx@fourthoffour#1#2#3#4{#4}% +% \end{macrocode} +% \end{macro} +% +% \subsection{List helpers} +% +% \begin{macro}{\ltx@carzero} +% \begin{macrocode} +\long\def\ltx@carzero#1\@nil{}% +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@cdrzero} +% \begin{macrocode} +\long\def\LTXcmds@cdrzero#1\@nil{#1} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@cdrzero} +% \begin{macrocode} +\def\ltx@cdrzero{% + \romannumeral\LTXcmds@cdrzero\ltx@zero +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@car} +% \begin{macrocode} +\long\def\ltx@car#1#2\@nil{#1} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@cdr} +% \begin{macrocode} +\long\def\ltx@cdr#1{% + \romannumeral\LTXcmds@cdrzero\ltx@zero +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@cartwo} +% \begin{macrocode} +\long\def\ltx@cartwo#1#2#3\@nil{#1#2} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@carsecond} +% \begin{macrocode} +\long\def\ltx@carsecond#1#2#3\@nil{#2} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@cdrtwo} +% \begin{macrocode} +\long\def\ltx@cdrtwo#1#2{% + \romannumeral\LTXcmds@cdrzero\ltx@zero +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@carthree} +% \begin{macrocode} +\long\def\ltx@carthree#1#2#3#4\@nil{#1#2#3} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@carthird} +% \begin{macrocode} +\long\def\ltx@carthird#1#2#3#4\@nil{#3} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@cdrthree} +% \begin{macrocode} +\long\def\ltx@cdrthree#1#2#3{% + \romannumeral\LTXcmds@cdrzero\ltx@zero +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@carfour} +% \begin{macrocode} +\long\def\ltx@carfour#1#2#3#4#5\@nil{#1#2#3#4} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@carfourth} +% \begin{macrocode} +\long\def\ltx@carfourth#1#2#3#4#5\@nil{#4} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@cdrfour} +% \begin{macrocode} +\long\def\ltx@cdrfour#1#2#3#4{% + \romannumeral\LTXcmds@cdrzero\ltx@zero +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@CarNum} +% \begin{macrocode} +\def\ltx@CarNum#1{% + \romannumeral + \csname LTXcmds@CarNumFinish% + \expandafter\LTXcmds@CarNum + \romannumeral\LTXcmds@num{#1}000{x\endcsname}% +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@CarNum} +% \begin{macrocode} +\def\LTXcmds@CarNum#1{% + \csname LTXcmds@C#1\LTXcmds@CarNum +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@Cm} +% \begin{macrocode} +\long\def\LTXcmds@Cm#1#2{% + \endcsname{#1#2}% +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@Cx} +% \begin{macrocode} +\def\LTXcmds@Cx#1{% + \endcsname{}% +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@CarNumFinish} +% \begin{macrocode} +\long\def\LTXcmds@CarNumFinish#1#2\@nil{% + \ltx@zero + #1% +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@CarNumth} +% \begin{macrocode} +\def\ltx@CarNumth#1{% + \romannumeral + \expandafter\expandafter\expandafter + \LTXcmds@CarNumth + \ltx@GobbleNum{#1}{}% +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@CarNumth} +% \begin{macrocode} +\long\def\LTXcmds@CarNumth#1#2\@nil{% + \ltx@zero + #1% +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@CdrNum} +% \begin{macrocode} +\def\ltx@CdrNum#1{% + \romannumeral% + \expandafter\expandafter\expandafter\ltx@cdrzero + \expandafter\expandafter\expandafter\ltx@zero + \ltx@GobbleNum{#1}% +} +% \end{macrocode} +% \end{macro} +% +% \subsection{Tail recursion} +% +% \begin{macro}{\ltx@ReturnAfterFi} +% \begin{macrocode} +\long\def\ltx@ReturnAfterFi#1\fi{\fi#1} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@ReturnAfterElseFi} +% \begin{macrocode} +\long\def\ltx@ReturnAfterElseFi#1\else#2\fi{\fi#1} +% \end{macrocode} +% \end{macro} +% +% \subsection{Empty macro} +% +% \begin{macro}{\ltx@empty} +% \begin{macrocode} +\def\ltx@empty{} +% \end{macrocode} +% \end{macro} +% +% \subsection{Characters} +% +% \begin{macro}{\ltx@space} +% \begin{macrocode} +\def\ltx@space{ } +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@percentchar} +% \begin{macrocode} +\begingroup + \lccode`0=`\%\relax +\lowercase{\endgroup + \def\ltx@percentchar{0}% +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@backslashchar} +% \begin{macrocode} +\begingroup + \lccode`0=`\\\relax +\lowercase{\endgroup + \def\ltx@backslashchar{0}% +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@hashchar} +% \begin{macrocode} +\begingroup + \lccode`0=`\#\relax +\lowercase{\endgroup + \def\ltx@hashchar{0}% +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@leftbracechar} +% \begin{macrocode} +\begingroup + \lccode`0=`\{\relax +\lowercase{\endgroup + \def\ltx@leftbracechar{0}% +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@rightbracechar} +% \begin{macrocode} +\begingroup + \lccode`0=`\}\relax +\lowercase{\endgroup + \def\ltx@rightbracechar{0}% +} +% \end{macrocode} +% \end{macro} +% +% \subsection{Boolean switch} +% +% \begin{macro}{\ltx@newif} +% \begin{macrocode} +\def\ltx@newif#1{% + \begingroup + \escapechar=-1 % + \expandafter\endgroup + \expandafter\LTXcmds@newif\string#1\@nil +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@newif} +% \begin{macrocode} +\begingroup + \escapechar=-1 % +\expandafter\endgroup +\expandafter\def\expandafter\LTXcmds@newif\string\if#1\@nil{% + \expandafter\edef\csname#1true\endcsname{% + \let + \expandafter\noexpand\csname if#1\endcsname + \noexpand\iftrue + }% + \expandafter\edef\csname#1false\endcsname{% + \let + \expandafter\noexpand\csname if#1\endcsname + \noexpand\iffalse + }% + \csname#1false\endcsname +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@newglobalif} +% \begin{macrocode} +\def\ltx@newglobalif#1{% + \begingroup + \escapechar=-1 % + \expandafter\endgroup + \expandafter\LTXcmds@newglobalif\string#1\@nil +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@newglobalif} +% \begin{macrocode} +\begingroup + \escapechar=-1 % +\expandafter\endgroup +\expandafter +\def\expandafter\LTXcmds@newglobalif\string\if#1\@nil{% + \expandafter\edef\csname#1true\endcsname{% + \global\let + \expandafter\noexpand\csname if#1\endcsname + \noexpand\iftrue + }% + \expandafter\edef\csname#1false\endcsname{% + \global\let + \expandafter\noexpand\csname if#1\endcsname + \noexpand\iffalse + }% + \csname#1false\endcsname +} +% \end{macrocode} +% \end{macro} +% +% \subsection{Command definitions} +% +% \begin{macro}{\ltx@LocalExpandAfter} +% \begin{macrocode} +\def\ltx@LocalExpandAfter{% + \begingroup + \expandafter\expandafter\expandafter + \endgroup + \expandafter +} +% \end{macrocode} +% \end{macro} +% +% \begin{macrocode} +\ltx@LocalExpandAfter +\ifx\csname ifcsname\endcsname\relax +% \end{macrocode} +% \begin{macro}{\ltx@ifundefined} +% \begin{macrocode} + \def\ltx@ifundefined#1{% + \expandafter\ifx\csname #1\endcsname\relax + \expandafter\ltx@firstoftwo + \else + \expandafter\ltx@secondoftwo + \fi + }% +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@IfUndefined} +% \begin{macrocode} + \def\ltx@IfUndefined#1{% + \begingroup\expandafter\expandafter\expandafter\endgroup + \expandafter\ifx\csname #1\endcsname\relax + \expandafter\ltx@firstoftwo + \else + \expandafter\ltx@secondoftwo + \fi + }% +% \end{macrocode} +% \end{macro} +% \begin{macrocode} + \expandafter\ltx@gobble +\else + \expandafter\ltx@firstofone +\fi +{% +% \end{macrocode} +% \begin{macro}{\ltx@ifundefined} +% \begin{macrocode} + \def\ltx@ifundefined#1{% + \ifcsname #1\endcsname + \expandafter\ifx\csname #1\endcsname\relax + \expandafter\expandafter\expandafter\ltx@firstoftwo + \else + \expandafter\expandafter\expandafter\ltx@secondoftwo + \fi + \else + \expandafter\ltx@firstoftwo + \fi + }% +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@IfUndefined} +% \begin{macrocode} + \let\ltx@IfUndefined\ltx@ifundefined +% \end{macrocode} +% \end{macro} +% \begin{macrocode} +} +% \end{macrocode} +% +% \subsection{Stripping} +% +% \begin{macro}{\ltx@RemovePrefix} +% \begin{macrocode} +\def\ltx@RemovePrefix#1>{} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@StripPrefix} +% \begin{macrocode} +\def\ltx@StripPrefix{% + \expandafter\ltx@RemovePrefix +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@onelevel@sanitize} +% \begin{macrocode} +\def\ltx@onelevel@sanitize#1{% + \edef#1{% + \expandafter + \ltx@RemovePrefix\meaning#1% + }% +} +% \end{macrocode} +% \end{macro} +% +% \subsection{File management} +% +% \subsubsection{File extensions} +% +% \begin{macro}{\ltx@clsextension} +% \begin{macrocode} +\def\ltx@clsextension{cls} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@pkgextension} +% \begin{macrocode} +\def\ltx@pkgextension{sty} +% \end{macrocode} +% \end{macro} +% +% \subsubsection{Load check} +% +% \begin{macro}{\ltx@iffileloaded} +% \begin{macrocode} +\def\ltx@iffileloaded#1{% + \ltx@ifundefined{ver@#1}\ltx@secondoftwo\ltx@firstoftwo +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@ifclassloaded} +% \begin{macrocode} +\def\ltx@ifclassloaded#1{% + \ltx@iffileloaded{#1.\ltx@clsextension}% +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@ifpackageloaded} +% \begin{macrocode} +\def\ltx@ifpackageloaded#1{% + \ltx@iffileloaded{#1.\ltx@pkgextension}% +} +% \end{macrocode} +% \end{macro} +% +% \subsubsection{Version date check} +% changed 2020-05-10 to adapt to dates with dashes (ISO) +% The core of the commands are copies from the latex commands. +% \begin{macro}{\ltx@ifl@ter} +% \begin{macro}{\ltx@parse@version@} +% \begin{macrocode} +\def\ltx@ifl@ter#1#2{% + \expandafter\ltx@ifl@t@r + \csname ver@#2.#1\endcsname} +\def\ltx@ifl@t@r#1#2{% + \ifnum\expandafter\ltx@parse@version@#1//00\@nil<% + \expandafter\ltx@parse@version@#2//00\@nil + \expandafter\@secondoftwo + \else + \expandafter\@firstoftwo + \fi} +\def\ltx@parse@version@#1{\ltx@parse@version0#1} +\def\ltx@parse@version#1/#2/#3#4#5\@nil{% +\ltx@parse@version@dash#1-#2-#3#4\@nil +} +\def\ltx@parse@version@dash#1-#2-#3#4#5\@nil{% + \if\relax#2\relax\else#1\fi#2#3#4 } +% \end{macrocode} +% \end{macro} +% \end{macro} +% \begin{macro}{\ltx@iffilelater} +% \begin{macrocode} +\def\ltx@iffilelater#1{\expandafter\ltx@ifl@t@r\csname ver@#1\endcsname} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@ifclasslater} +% \begin{macrocode} +\def\ltx@ifclasslater{\ltx@ifl@ter\ltx@clsextension} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@ifpackagelater} +% \begin{macrocode} +\def\ltx@ifpackagelater{\ltx@ifl@ter\ltx@pkgextension} +% \end{macrocode} +% \end{macro} +% +% +% \subsection{Macro additions} +% +% \begin{macro}{\ltx@GlobalAppendToMacro} +% \begin{macrocode} +\long\def\ltx@GlobalAppendToMacro#1#2{% + \ifx\ltx@undefined#1% + \let#1\ltx@empty + \else + \ifx\relax#1% + \let#1\ltx@empty + \fi + \fi + \begingroup + \ltx@LocToksA\expandafter{#1#2}% + \xdef#1{\the\ltx@LocToksA}% + \endgroup +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocalAppendToMacro} +% \begin{macrocode} +\long\def\ltx@LocalAppendToMacro#1#2{% + \global\let\LTXcmds@gtemp#1% + \ifx\ltx@undefined\LTXcmds@gtemp + \global\let\LTXcmds@gtemp\ltx@empty + \else + \ifx\relax\LTXcmds@gtemp + \global\letLTXcmds@gtemp\ltx@empty + \fi + \fi + \begingroup + \ltx@LocToksA\expandafter{\LTXcmds@gtemp#2}% + \xdef\LTXcmds@gtemp{\the\ltx@LocToksA}% + \endgroup + \let#1\LTXcmds@gtemp +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@GlobalPrependToMacro} +% \begin{macrocode} +\long\def\ltx@GlobalPrependToMacro#1#2{% + \ifx\ltx@undefined#1% + \let#1\ltx@empty + \else + \ifx\relax#1% + \let#1\ltx@empty + \fi + \fi + \begingroup + \ltx@LocToksA{#2}% + \ltx@LocToksB\expandafter{#1}% + \xdef#1{\the\ltx@LocToksA\the\ltx@LocToksB}% + \endgroup +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@LocalPrependToMacro} +% \begin{macrocode} +\long\def\ltx@LocalPrependToMacro#1#2{% + \global\let\LTXcmds@gtemp#1% + \ifx\ltx@undefined\LTXcmds@gtemp + \global\let\LTXcmds@gtemp\ltx@empty + \else + \ifx\relax\LTXcmds@gtemp + \global\letLTXcmds@gtemp\ltx@empty + \fi + \fi + \begingroup + \ltx@LocToksA{#2}% + \ltx@LocToksB\expandafter{\LTXcmds@gtemp}% + \xdef\LTXcmds@gtemp{\the\ltx@LocToksA\the\ltx@LocToksB}% + \endgroup + \let#1\LTXcmds@gtemp +} +% \end{macrocode} +% \end{macro} +% +% \subsection{Next character detection} +% +% \begin{macro}{\ltx@ifnextchar} +% \begin{macrocode} +\long\def\ltx@ifnextchar#1#2#3{% + \begingroup + \let\LTXcmds@CharToken= #1\relax + \ltx@LocToksA{\endgroup#2}% + \ltx@LocToksB{\endgroup#3}% + \futurelet\LTXcmds@LetToken\LTXcmds@ifnextchar +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@ifnextchar} +% \begin{macrocode} +\def\LTXcmds@ifnextchar{% + \ifx\LTXcmds@LetToken\LTXcmds@CharToken + \the\expandafter\ltx@LocToksA + \else + \expandafter + \ifx\csname LTXcmds@LetToken\endcsname\LTXcmds@SpaceToken + \expandafter\expandafter\expandafter\LTXcmds@@ifnextchar + \else + \the\expandafter\expandafter\expandafter\ltx@LocToksB + \fi + \fi +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@@ifnextchar} +% \cs{futurelet} does not distinguish between a +% character and a command that is a character +% (defined by using \cs{let} or \cs{futurelet}). +% Therefore the space is catched by \cs{romannumeral} +% with negative character constant that gobbles one +% optional space. +% \begin{macrocode} +\def\LTXcmds@@ifnextchar{% + \expandafter\futurelet + \expandafter\LTXcmds@LetToken + \expandafter\LTXcmds@ifnextchar + \romannumeral-`\.% +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@SpaceToken} +% \begin{macrocode} +\ltx@firstofone{\let\LTXcmds@SpaceToken= } % +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@ifnextchar@nospace} +% \begin{macrocode} +\long\def\ltx@ifnextchar@nospace#1#2#3{% + \begingroup + \let\LTXcmds@CharToken= #1\relax + \ltx@LocToksA{\endgroup#2}% + \ltx@LocToksB{\endgroup#3}% + \futurelet\LTXcmds@LetToken\LTXcmds@ifnextchar@nospace +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@ifnextchar@nospace} +% \begin{macrocode} +\def\LTXcmds@ifnextchar@nospace{% + \the + \ifx\LTXcmds@LetToken\LTXcmds@CharToken + \expandafter\ltx@LocToksA + \else + \expandafter\ltx@LocToksB + \fi +} +% \end{macrocode} +% \end{macro} +% \subsection{\cs{ltx@leavevmode}, \cs{ltx@mbox}} +% +% \begin{macro}{\ltx@leavevmode} +% \begin{macrocode} +\ltx@IfUndefined{quitvmode}{% + \ltx@IfUndefined{leavevmode}{% + \ltx@IfUndefined{voidb@x}{% + \ltx@IfUndefined{newbox}{% + \def\ltx@leavevmode{% + \begingroup + \setbox\ltx@zero=\hbox{}% + \begingroup + \setbox\ltx@zero=\hbox{\box\ltx@zero}% + \endgroup + \unhbox\ltx@zero + \endgroup + }% + }{% + \csname newbox\endcsname\LTXcmds@VoidBox + \ifvoid\LTXcmds@VoidBox + \else + \setbox\LTXcmds@VoidBox=\hbox{}% + \begingroup + \setbox\LTXcmds@VoidBox=\hbox{\box\LTXcmds@VoidBox}% + \endgroup + \fi + \def\ltx@leavevmode{\unhbox\LTXcmds@VoidBox}% + }% + }{% + \def\ltx@leavevmode{\unhbox\voidb@x}% + }% + }{% + \let\ltx@leavevmode\leavevmode + }% +}{% + \let\ltx@leavevmode\quitvmode +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@mbox} +% \begin{macrocode} +\def\ltx@mbox{% + \ltx@leavevmode + \hbox +} +% \end{macrocode} +% \end{macro} +% +% \subsection{Help macros} +% +% \begin{macro}{\LTXcmds@num} +% \begin{macrocode} +\ltx@IfUndefined{numexpr}{% + \def\LTXcmds@num#1{% + \expandafter\ltx@firstofone\expandafter{% + \number#1% + }% + }% +}{% + \def\LTXcmds@num#1{% + \expandafter\ltx@firstofone\expandafter{% + \the\numexpr#1% + }% + }% +} +% \end{macrocode} +% \end{macro} +% +% \subsection{Expandable test for emptiness} +% +% \begin{macrocode} +\ltx@IfUndefined{detokenize}{% +% \end{macrocode} +% +% \subsubsection{Vanilla \hologo{TeX}} +% +% \begin{macro}{\ltx@ifempty} +% The macro is based on \cs{@ifempty} of Robert R. Schneck +% \cite{ifempty:schneck} +% and \cs{@ifnull} of Ulrich Diez \cite{ifnull:diez}. +% There are three cases to consider: +% \begin{compactenum} +% \item |#1| is empty, +% \item |#1| is not empty and the first token +% is not a begingroup character, +% \item |#1| starts with a begingroup character (catcode 1). +% \end{compactenum} +% \begin{macrocode} + \def\LTXcmds@temp#1{% + \long\def\ltx@ifempty##1{% + \romannumeral0% + \iffalse{\fi + \expandafter\ltx@gobble\expandafter{% + \expandafter{\string##1}% + \expandafter\ltx@gobble\string + }% + \expandafter\ltx@firstofthree\expandafter + {\iffalse}\fi + \expandafter#1\ltx@secondoftwo + }% + \expandafter#1\ltx@firstoftwo + }% +% \end{macrocode} +% \end{macro} +% \begin{macro}{\ltx@ifblank} +% \begin{macrocode} + \long\def\ltx@ifblank##1{% + \romannumeral0% + \iffalse{\fi + \expandafter\expandafter\expandafter\ltx@gobble + \expandafter\expandafter\expandafter{% + \expandafter\expandafter\expandafter{% + \expandafter\string\ltx@gobble##1.% + }% + \expandafter\ltx@gobble\string + }% + \expandafter\ltx@firstofthree\expandafter + {\iffalse}\fi + \expandafter#1\ltx@secondoftwo + }% + \expandafter#1\ltx@firstoftwo + }% + }% + \LTXcmds@temp{ }% +% \end{macrocode} +% \end{macro} +% \begin{macrocode} +}{% +% \end{macrocode} +% +% \subsubsection{With \cs{detokenize}} +% +% Ahmed Musa provided \cs{ifstrempty} using \cs{detokenize} +% and \cs{pdfstrcmp} \cite{ifstrempty:musa}. Ulrich Diez, GL, +% Heiko Oberdiek +% improved it further by removing \cs{pdfstrcmp} and +% taking three arguments +% \cite{ifstrempty:diez1,ifstrempty:diez2,ifstrempty:diez3,^^A +% ifstrempty:gl,ifstrempty:ho}. +% +% \begin{macro}{\ltx@ifempty} +% \begin{macrocode} + \long\def\ltx@ifempty#1{% + \romannumeral% + \csname + LTXcmds@ifempty% + \ifcat$\detokenize{#1}$% + @% + \fi + \endcsname + }% +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@ifempty@} +% \begin{macrocode} + \long\def\LTXcmds@ifempty@#1#2{0 #1}% +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@ifempty} +% \begin{macrocode} + \long\def\LTXcmds@ifempty#1#2{0 #2}% +% \end{macrocode} +% \end{macro} +% +% \subsubsection{\cs{ltx@ifblank}} +% +% \begin{macro}{\ltx@ifblank} +% \begin{macrocode} + \long\def\ltx@ifblank#1{% + \romannumeral% + \csname + LTXcmds@ifempty% + \ifcat$\detokenize\expandafter{\ltx@gobble#1.}$% + @% + \fi + \endcsname + }% +% \end{macrocode} +% \end{macro} +% +% \begin{macrocode} +} +% \end{macrocode} +% +% \subsection{\cs{ltx@zapspace}} +% +% \begin{macro}{\ltx@zapspace} +% \begin{macrocode} +\long\def\ltx@zapspace#1{% + \romannumeral + \LTXcmds@zapspace\ltx@zero#1 \@nil +} +% \end{macrocode} +% \end{macro} +% \begin{macro}{\LTXcmds@zapspace} +% \begin{macrocode} +\long\def\LTXcmds@zapspace#1 #2\@nil{% + \ltx@ifempty{#2}{% + #1% + }{% + \LTXcmds@zapspace#1#2\@nil + }% +} +% \end{macrocode} +% \end{macro} +% +% \subsection{\cs{ltx@IfBoxEmpty}} +% +% In case of \hologo{eTeX} the test for an empty box +% is done via \cs{lastnodetype} as suggested +% by David Kastrup \cite{ifboxempty:dak}. +% \begin{macrocode} +\ltx@IfUndefined{lastnodetype}{% + \catcode`\$=9 % + \catcode`\&=14 % +}{% + \catcode`\$=14 % + \catcode`\&=9 % +} +% \end{macrocode} +% \begin{macro}{\ltx@IfBoxEmpty} +% \begin{macrocode} +\def\ltx@IfBoxEmpty#1{% + \ifvoid#1\relax + \expandafter\ltx@secondoftwo + \else +% \end{macrocode} +% Implementation using \hologo{eTeX}'s \cs{lastnodetype}. +% \begin{macrocode} +& \begingroup +& \setbox\ltx@zero=\ifhbox#1\hbox\else\vbox\fi{% +& \ifhmode\unhcopy\else\unvcopy\fi#1\relax +& \expandafter +& }% +& \expandafter\endgroup +& \ifnum\lastnodetype<\ltx@zero +& \expandafter\expandafter\expandafter\ltx@firstoftwo +& \else +& \expandafter\expandafter\expandafter\ltx@secondoftwo +& \fi +% \end{macrocode} +% Implementation without \hologo{eTeX} using a signature +% at the beginning of the test box. +% \begin{macrocode} +$ \begingroup +$ \setbox\ltx@zero=\ifhbox#1\hbox\else\vbox\fi{% +$ \penalty\ltx@one +$ \ifhmode\unhcopy\else\unvcopy\fi#1\relax +$ \expandafter +$ }% +$ \ifnum\lastpenalty=\ltx@one +% \end{macrocode} +% Box 0 has been changed and is restored by +% closing the group. +% \begin{macrocode} +$ \endgroup +$ \begingroup +$ \setbox\ltx@zero=\ifhbox#1\hbox\else\vbox\fi{% +$ \penalty\ltx@two +$ \ifhmode\unhcopy\else\unvcopy\fi#1\relax +$ \expandafter +$ }% +$ \ifnum\lastpenalty=\ltx@two +$ \def\next{\endgroup\expandafter\ltx@firstoftwo}% +$ \else +$ \def\next{\endgroup\expandafter\ltx@secondoftwo}% +$ \fi +$ \else +$ \def\next{\endgroup\expandafter\ltx@secondoftwo}% +$ \fi +$ \next + \fi +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\ltx@IfBoxVoidOrEmpty} +% \begin{macrocode} +\def\ltx@IfBoxVoidOrEmpty#1{% + \ifvoid#1\relax + \expandafter\ltx@thirdoffour + \fi + \ltx@IfBoxEmpty{#1}% +} +% \end{macrocode} +% \end{macro} +% +% \begin{macrocode} +\LTXcmds@AtEnd% +%</package> +% \end{macrocode} +%% \section{Installation} +% +% \subsection{Download} +% +% \paragraph{Package.} This package is available on +% CTAN\footnote{\CTANpkg{ltxcmds}}: +% \begin{description} +% \item[\CTAN{macros/latex/contrib/ltxcmds/ltxcmds.dtx}] The source file. +% \item[\CTAN{macros/latex/contrib/ltxcmds/ltxcmds.pdf}] Documentation. +% \end{description} +% +% +% \subsection{Package installation} +% The package is at best installed with the package manager of the \TeX~system. +% Manual installation is possible too: +% \paragraph{Unpacking.} The \xfile{.dtx} file is a self-extracting +% \docstrip\ archive. The files are extracted by running the +% \xfile{.dtx} through \plainTeX: +% \begin{quote} +% \verb|tex ltxcmds.dtx| +% \end{quote} +% +% \paragraph{TDS.} Now the different files must be moved into +% the different directories in your installation TDS tree +% (also known as \xfile{texmf} tree): +% \begin{quote} +% \def\t{^^A +% \begin{tabular}{@{}>{\ttfamily}l@{ $\rightarrow$ }>{\ttfamily}l@{}} +% ltxcmds.sty & tex/generic/ltxcmds/ltxcmds.sty\\ +% ltxcmds.pdf & doc/latex/ltxcmds/ltxcmds.pdf\\ +% ltxcmds.dtx & source/latex/ltxcmds/ltxcmds.dtx\\ +% \end{tabular}^^A +% }^^A +% \sbox0{\t}^^A +% \ifdim\wd0>\linewidth +% \begingroup +% \advance\linewidth by\leftmargin +% \advance\linewidth by\rightmargin +% \edef\x{\endgroup +% \def\noexpand\lw{\the\linewidth}^^A +% }\x +% \def\lwbox{^^A +% \leavevmode +% \hbox to \linewidth{^^A +% \kern-\leftmargin\relax +% \hss +% \usebox0 +% \hss +% \kern-\rightmargin\relax +% }^^A +% }^^A +% \ifdim\wd0>\lw +% \sbox0{\small\t}^^A +% \ifdim\wd0>\linewidth +% \ifdim\wd0>\lw +% \sbox0{\footnotesize\t}^^A +% \ifdim\wd0>\linewidth +% \ifdim\wd0>\lw +% \sbox0{\scriptsize\t}^^A +% \ifdim\wd0>\linewidth +% \ifdim\wd0>\lw +% \sbox0{\tiny\t}^^A +% \ifdim\wd0>\linewidth +% \lwbox +% \else +% \usebox0 +% \fi +% \else +% \lwbox +% \fi +% \else +% \usebox0 +% \fi +% \else +% \lwbox +% \fi +% \else +% \usebox0 +% \fi +% \else +% \lwbox +% \fi +% \else +% \usebox0 +% \fi +% \else +% \lwbox +% \fi +% \else +% \usebox0 +% \fi +% \end{quote} +% If you have a \xfile{docstrip.cfg} that configures and enables \docstrip's +% TDS installing feature, then some files can already be in the right +% place, see the documentation of \docstrip. +% +% \subsection{Refresh file name databases} +% +% If your \TeX~distribution +% (\TeX\,Live, \mikTeX, \dots) relies on file name databases, you must refresh +% these. For example, \TeX\,Live\ users run \verb|texhash| or +% \verb|mktexlsr|. +% +% \subsection{Some details for the interested} +% +% \paragraph{Unpacking with \LaTeX.} +% The \xfile{.dtx} chooses its action depending on the format: +% \begin{description} +% \item[\plainTeX:] Run \docstrip\ and extract the files. +% \item[\LaTeX:] Generate the documentation. +% \end{description} +% If you insist on using \LaTeX\ for \docstrip\ (really, +% \docstrip\ does not need \LaTeX), then inform the autodetect routine +% about your intention: +% \begin{quote} +% \verb|latex \let\install=y\input{ltxcmds.dtx}| +% \end{quote} +% Do not forget to quote the argument according to the demands +% of your shell. +% +% \paragraph{Generating the documentation.} +% You can use both the \xfile{.dtx} or the \xfile{.drv} to generate +% the documentation. The process can be configured by the +% configuration file \xfile{ltxdoc.cfg}. For instance, put this +% line into this file, if you want to have A4 as paper format: +% \begin{quote} +% \verb|\PassOptionsToClass{a4paper}{article}| +% \end{quote} +% An example follows how to generate the +% documentation with pdf\LaTeX: +% \begin{quote} +%\begin{verbatim} +%pdflatex ltxcmds.dtx +%makeindex -s gind.ist ltxcmds.idx +%pdflatex ltxcmds.dtx +%makeindex -s gind.ist ltxcmds.idx +%pdflatex ltxcmds.dtx +%\end{verbatim} +% \end{quote} +% +% \begin{thebibliography}{9} +% \raggedright +% +% \bibitem{ifempty:schneck} +% Robert R. Schneck: +% \textit{Re: \cs{ifempty} solution % +% (was Macro puzzle: maximally general \cs{ifempty})}; +% newsgroup \xnewsgroup{comp.text.tex}, +% \url{news:3eef1ada_6@corp.newsgroups.com}, +% 2003-06-17.\\ +% {\small +% \url{https://groups.google.com/group/comp.text.tex/msg/be03a159ec374895}} +% +% \bibitem{ifnull:diez} +% Ulrich Diez: +% \textit{Re: TeX refuses to strip outer braces in argument}; +% newsgroup \xnewsgroup{comp.text.tex}, +% \url{news:ibk3t8$ee7$1@news.albasani.net}, +% 2010-11-12.\\ +% {\small +% \url{https://groups.google.com/group/comp.text.tex/msg/803bd57221a04996}} +% +% \bibitem{ifstrempty:musa} +% Ahmed Musa: +% \textit{Re: TeX refuses to strip outer braces in argument}; +% newsgroup \xnewsgroup{comp.text.tex}, +% \url{news:f5496afe-40ed-42bd-b629-a2419ecf7c0d@o14g2000prn.googlegroups.com}, +% 2010-12-03.\\ +% {\small +% \url{https://groups.google.com/group/comp.text.tex/msg/fbf7d61a0c3a807d}} +% +% \bibitem{ifstrempty:diez1} +% Ulrich Diez: +% \textit{Re: TeX refuses to strip outer braces in argument}; +% newsgroup \xnewsgroup{comp.text.tex}, +% \url{news:idbo94$uka$1@four.albasani.net}, +% 2010-12-03.\\ +% {\small +% \url{https://groups.google.com/group/comp.text.tex/msg/0c230ee479487962}} +% +% \bibitem{ifstrempty:diez2} +% Ulrich Diez: +% \textit{Re: TeX refuses to strip outer braces in argument}; +% newsgroup \xnewsgroup{comp.text.tex}, +% \url{news:idbpu4$cg1$1@news.albasani.net}, +% 2010-12-03.\\ +% {\small +% \url{https://groups.google.com/group/comp.text.tex/msg/bbef4263390d647b}} +% +% \bibitem{ifstrempty:diez3} +% Ulrich Diez: +% \textit{Re: TeX refuses to strip outer braces in argument}; +% newsgroup \xnewsgroup{comp.text.tex}, +% \url{news:idd4ga$r83$1@four.albasani.net}, +% 2010-12-04.\\ +% {\small +% \url{https://groups.google.com/group/comp.text.tex/msg/00dfd1ec103cd272}} +% +% \bibitem{ifstrempty:gl} +% GL: +% \textit{Re: TeX refuses to strip outer braces in argument}; +% newsgroup \xnewsgroup{comp.text.tex}, +% \url{news:4cfa2e27$0$7389$426a74cc@news.free.fr}, +% 2010-12-04.\\ +% {\small +% \url{https://groups.google.com/group/comp.text.tex/msg/d3a75995c1cf267e}} +% +% \bibitem{ifstrempty:ho} +% Heiko Oberdiek: +% \textit{Re: TeX refuses to strip outer braces in argument}; +% newsgroup \xnewsgroup{comp.text.tex}, +% \url{news:iddhq1$3kj$1@news.eternal-september.org}, +% 2010-12-04.\\ +% {\small +% \url{https://groups.google.com/group/comp.text.tex/msg/5f7a23e3ab70e347}} +% +% \bibitem{ifboxempty:dak} +% David Kastrup: +% \textit{How to detect if \cs{vbox} is empty}; +% newsgroup \xnewsgroup{comp.text.tex}, +% 2011-02-04.\\ +% {\small +% \url{https://groups.google.com/group/comp.text.tex/msg/8d3cb89496a4d86d}} +% +% \end{thebibliography} +% +% \begin{History} +% \begin{Version}{2009/08/05 v1.0} +% \item +% First version. +% \end{Version} +% \begin{Version}{2009/12/12 v1.1} +% \item +% Short title shortened. +% \item +% \cs{ltx@IfUndefined} added. +% \end{Version} +% \begin{Version}{2010/01/28 v1.2} +% \item +% \cs{ltx@RemovePrefix} and \cs{ltx@StripPrefix} added. +% \item +% \cs{ltx@ifclassloaded}, \cs{ltx@ifpackageloaded}, +% \cs{ltx@iffileloaded}, +% \cs{ltx@ifclasslater}, \cs{ltx@ifpackagelater}, +% \cs{ltx@iffilelater}, +% \cs{ltx@clsextension}, \cs{ltx@pkgextension} added. +% \item +% \cs{ltx@GlobalAppendToMacro}, \cs{ltx@LocalAppendToMacro} added. +% \end{Version} +% \begin{Version}{2010/03/01 v1.3} +% \item +% \cs{ltx@newif} added. +% \item +% \cs{ltx@ifnextchar} added. +% \item +% Numbers \cs{ltx@zero}, \cs{ltx@one}, \cs{ltx@two}, \cs{ltx@cclv} added. +% \end{Version} +% \begin{Version}{2010/03/09 v1.4} +% \item +% \cs{ltx@pkgextension} and \cs{ltx@clsextension} are hardcoded to +% avoid trouble with \cs{@onlypreamble}. +% \end{Version} +% \begin{Version}{2010/04/08 v1.5} +% \item +% \cs{ltx@cartwo}, \cs{ltx@cdrtwo}, +% \cs{ltx@carthree}, \cs{ltx@cdrthree}, +% \cs{ltx@carfour}, \cs{ltx@cdrfour} added. +% \item +% \cs{ltx@ReturnAfterFi} and \cs{ltx@ReturnAfterElseFi} fixed. +% \end{Version} +% \begin{Version}{2010/04/16 v1.6} +% \item +% \cs{ltx@leavevmode}, \cs{ltx@mbox} added. +% \end{Version} +% \begin{Version}{2010/04/26 v1.7} +% \item +% \cs{ltx@GobbleNum}, \cs{ltx@CdrNum}, \cs{ltx@CarNum} added. +% \item +% \cs{ltx@carzero}, \cs{ltx@cdrzero} added. +% \item +% \cs{ltx@hashchar} added. +% \end{Version} +% \begin{Version}{2010/09/11 v1.8} +% \item +% \cs{ltx@leftbracechar}, \cs{ltx@rightbracechar} added. +% \end{Version} +% \begin{Version}{2010/10/25 v1.9} +% \item +% \cs{ltx@LocalAppendToMacro} and \cs{ltx@GlobalAppendToMacro} are +% now \cs{long}. +% \end{Version} +% \begin{Version}{2010/10/31 v1.10} +% \item +% \cs{ltx@newglobalif} added. +% \end{Version} +% \begin{Version}{2010/11/12 v1.11} +% \item +% \cs{ltx@ifempty} added. +% \item +% \cs{ltx@firstofthree}, \cs{ltx@secondofthree}, \cs{ltx@thirdofthree} +% added. +% \end{Version} +% \begin{Version}{2010/12/02 v1.12} +% \item +% \cs{ltx@onelevel@sanitize} added. +% \item +% \cs{LTXcmds@num} fixed for the case with \cs{numexpr} +% (bug found by GL). +% \end{Version} +% \begin{Version}{2010/12/04 v1.13} +% \item +% \cs{ltx@ifblank} added. +% \item +% Optimization for \cs{ltx@ifempty}. +% \end{Version} +% \begin{Version}{2010/12/07 v1.14} +% \item +% \cs{ltx@zapspace} added. +% \end{Version} +% \begin{Version}{2010/12/12 v1.15} +% \item +% \cs{ltx@minusone} added. +% \end{Version} +% \begin{Version}{2011/02/04 v1.16} +% \item +% \cs{ltx@IfBoxEmpty} and \cs{ltx@IfBoxVoidOrEmpty} added. +% \item +% \cs{ltx@firstoffour}, \dots, \cs{ltx@fourthoffour} added. +% \end{Version} +% \begin{Version}{2011/02/05 v1.17} +% \item +% \cs{ltx@IfBoxEmpty}: an empty box may have non-zero dimensions. +% \end{Version} +% \begin{Version}{2011/03/16 v1.18} +% \item +% \cs{ltx@ifclasslater} fixed. +% \end{Version} +% \begin{Version}{2011/04/14 v1.19} +% \item +% \cs{ltx@ifnextchar}: detection of optional spaces modified. +% \item +% \cs{ltx(Loc,Glob)(Toks,Dimen,Skip)(A,B,C,D,E)} added. +% \end{Version} +% \begin{Version}{2011/04/18 v1.20} +% \item +% \cs{ltx@ifnextchar} with conditional support (thanks GL for +% bug report). +% \end{Version} +% \begin{Version}{2011/08/22 v1.21} +% \item +% \cs{ltx@GlobalPrependToMacro}, \cs{ltx@LocalPrependToMacro} added +% (feature request of Martin M\"unch). +% \end{Version} +% \begin{Version}{2011/11/09 v1.22} +% \item +% \cs{ltx@carsecond}, \cs{ltx@carthird}, \cs{ltx@carfourth}, +% \cs{ltx@CarNumth} added. +% \item +% \cs{ltx@cdrzero}, \cs{ltx@cdr}, \cs{ltx@cdrtwo}, cs{ltx@cdrthree}, +% \cs{ltx@cdrfour}, \cs{ltx@CdrNum} modified to retain braces and spaces. +% They are expandable in two expansion steps. +% \end{Version} +% \begin{Version}{2016/05/16 v1.23} +% \item +% Documentation updates. +% \end{Version} +% \begin{Version}{2019/12/15 v1.24} +% \item +% Documentation updates. +% \end{Version} +% \begin{Version}{2020-05-10 v1.25} +% \item Changed the definitions of \cs{ltx@iffilelater}, \cs{ltx@ifpackagelater} +% and \cs{ltx@ifclasslater} to support dates in ISO format in same way as the +% LaTeX kernel does it since 2017. The commands now use the same test as the +% LaTeX kernel. \cs{pdfmatch} is no longer used with pdftex, and the tests for dates before +% 1994 have been removed +% \end{Version} +% \end{History} +% +% \PrintIndex +% +% \Finale +\endinput diff --git a/macros/generic/ltxcmds/ltxcmds.pdf b/macros/generic/ltxcmds/ltxcmds.pdf Binary files differnew file mode 100644 index 0000000000..1dfb9104f3 --- /dev/null +++ b/macros/generic/ltxcmds/ltxcmds.pdf |