<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">%
%% User documentation and source for ltxtable package
%% (C) 1995, 2021 David Carlisle
%
%% This file may be distributed under the terms of the LPPL.
%% See 00readme.txt for details.
%
% Save this file as ltxtable.tex, then
% latex ltxtable
%
% This will write the ltxtable.sty package file on to your system
% and produce some rather terse typeset documentation.
%
\begin{filecontents}[overwrite]{ltx1.tex}
\begin{longtable}{|cXX|}
the &amp; head&amp; line\endhead
the &amp; foot&amp; line\endfoot
a&amp;b&amp;b\\
\multicolumn{2}{c}{xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx}&amp;c\\
a&amp;b&amp;b b b b b b b b b b b b b b b b b b b b b b b b b b \\
a a&amp; b b&amp; c c\\
a a&amp; b b&amp; 
  c c c c c c c c c c c c c c c c c c c c c c c c c c c c c cc cc\\
a a  aaaa&amp; b b&amp; c ccccc\\
\end{longtable}
\end{filecontents}

\begin{filecontents}[overwrite]{ltxtable.sty}
%
%% ltxtable package (C) 1995, 2021 David Carlisle
%%
%% This file may be distributed under the terms of the LPPL.
%% See 00readme.txt for details.
%
% User documentation is in the file ltxtable.tex
%
%    \begin{macrocode}
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{ltxtable}
                [2021/06/13 v0.4 longtable/tabularx merge (DPC)]
%    \end{macrocode}
% 
% May as get these in, going to need them...
%    \begin{macrocode}
\RequirePackage{tabularx,longtable}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\LTXtable#1#2{%
\begingroup
\TX@target#1\relax
\expandafter\TX@newcol\expandafter{\tabularxcolumn{\TX@col@width}}%
  \def\@elt##1{\global\value{##1}\the\value{##1}\relax}%
  \edef\TX@ckpt{\cl@@ckpt}%
  \let\@elt\relax
  \TX@old@table=\maxdimen
  \TX@col@width=\TX@target
  \global\TX@cols=\@ne
  \TX@typeout@
    {\@spaces Table Width\@spaces Column Width\@spaces X Columns}%
%    \end{macrocode}
% Need to modify |\TX@trial| so that |longtable| functions are
% Subverted to do the measuring that |tabularx| normally does.
% Also during the trial runs each `chunk' is not unboxed so it just
% gets thrown away when the next chunk starts.
%    \begin{macrocode}
\def\TX@trial##1{%
  \setbox\@tempboxa=\hbox{%
%    \end{macrocode}
% |\multicolum| A sad tale, For now just stop |longtable| messing with
% it, so that |tabularx| can mess with it.
%    \begin{macrocode}
\let\LTmulticolumn\multicolumn
%    \end{macrocode}
%
%    \begin{macrocode}
\def\endlongtable{%
  \LT@echunk
% from 2021 longtable uses an allocated box \LT@gbox not \box1
\global\setbox\LT@gbox\hbox{\unhbox\LT@gbox}%
  \kern\wd\LT@gbox
  \LT@get@widths%
  \endgroup}%
%    \end{macrocode}
%
%    \begin{macrocode}
\def\LT@ntabularcr{%
  \ifnum0=`{}\fi
  \LT@echunk
  \LT@get@widths
  \LT@bchunk}%
%    \end{macrocode}
%
%    \begin{macrocode}
\def\LT@argtabularcr[####1]{%
  \ifnum0=`{}\fi
  \ifdim ####1&gt;\z@
  \unskip\@xargarraycr{####1}\else \@yargarraycr{####1}\fi
  \LT@echunk
  \LT@get@widths
  \LT@bchunk}%
%    \end{macrocode}
%
%    \begin{macrocode}
% Any extra commands. This is used on the first run to count the number
% of {\ttfamily X} columns.
%    \begin{macrocode}
    ##1\relax
%    \end{macrocode}
% Added at v1.05: dissable "\write"s during a trial run. This trick is
% from the \TeX{}Book.
%    \begin{macrocode}
   \let\immediate=\relax\def\write####1####{{\afterassignment}\toks@=}%
%    \end{macrocode}
% Turn off warnings (see appendix D). Also prevent them being turned
% back on by setting the parameter names to be registers.
%    \begin{macrocode}
    \hbadness=\@M\hfuzz=\maxdimen
    \let\hbadness=\@tempcnta\let\hfuzz=\@tempdima
%    \end{macrocode}
% Make the table, and finish the hbox.
% Since v1.06, "\toks@" contains the preamble specification,
% and possible optional argument, as well as the table body.
% Well it does in |tabularx|, here the body is in an external file so
% just input it.
%    \begin{macrocode}
    \input{#2}\unskip}%
%    \end{macrocode}
% Since v1.05 reset all \LaTeX\ counters, by executing "\TX@ckpt".
%    \begin{macrocode}
\TX@ckpt
%    \end{macrocode}
% Print some statistics.
% Added "\TX@align" in v1.05, to line up the columns.
%    \begin{macrocode}
  \TX@typeout@{\@spaces
     \expandafter\TX@align
        \the\wd\@tempboxa\space\space\space\space\space\@@
     \expandafter\TX@align
        \the\TX@col@width\space\space\space\space\space\@@
     \@spaces\the\TX@cols}}%
%    \end{macrocode}
% \end{macro}
  \TX@trial{\def\NC@rewrite@X{%
          \global\advance\TX@cols\@ne\NC@find p{\TX@col@width}}}%
\let\LT@make@row\LT@blank@row
  \loop
    \TX@arith
    \ifTX@
    \TX@trial{}%
  \repeat
%    \end{macrocode}
% On the last run, may as well run with |\setlongtables|.
%    \begin{macrocode}
\let\LT@make@row\relax
\input{#2}%
\endgroup}
%    \end{macrocode}


\end{filecontents}

\documentclass{article}
\setlength{\textheight}{5in}
\usepackage{ltxtable}

\tracingtabularx
\begin{document}

\title{ltxtable: longtable meets tabularx}
\author{David Carlisle}
\date{2021/06/13}
\maketitle

Since \texttt{tabularx} was put on the archives in 1992 or so I have
had a constant stream of email messages asking for a merged
\texttt{tabularx}/\texttt{longtable} package.

Well here it is!  (First draft, anyway.)

Rules of the game:

\begin{itemize}
\item Put the \texttt{longtable} environment using \texttt{tabularx}
  style \texttt{X} column specifiers in a file \emph{file} on its
  own. (You can use the \texttt{filecontents} environment to include
  it back into the main document file, if you wish.)
\item If you want to input the file at some point, using the
  \texttt{X} columns to force the table width to be \emph{width} wide,
  go \verb|\LTXtable{|\emph{width}\verb|}{|\emph{file}\verb|}|.
\item \verb|\multicolumn|: If you read the \texttt{tabularx} and
  \texttt{longtable} docs you will find that both packages have a lot
  of fun with this command. In order to keep my sanity, for this
  merger I disable \texttt{longtable}'s version of \verb|\multicolumn|.
  This means that the column widths calculated are not always the same
  (not as good as) the widths that would be calculated by an
  equivalent \texttt{tabularx} environment. Perhaps one day I will do
  something about this. Perhaps.
\end{itemize}

\clearpage

\centering


A 300pt rule, just so can see the required width.

\mbox{\vrule width 300pt height 1pt}

First a tabularx


\begingroup
\renewenvironment{longtable}{\noindent\tabularx{300pt}}{\endtabularx}
\def\endhead{\\}\def\endfoot{\rlap{ !!!}\\}
\input{ltx1}
\endgroup


Then a longtable



\LTXtable{300pt}{ltx1}

\end{document}

1995/11/07 v0.1  first release
1995/12/11 v0.2  (Petr Sojka) Typos fixed so the package works!
                 (Initial release *always* read the same table file,
                  ignoring the argument...)
2001/06/12 v0.3  longtable now uses \LT@gbox not \box\@ne so change here to match.
2021/06/13 v0.4  what year is it....
</pre></body></html>