% \iffalse meta-comment
%
% Copyright (C) 2005, 2006 by Heiko Oberdiek <oberdiek@uni-freiburg.de>
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either
% version 1.3 of this license or (at your option) any later
% version. The latest version of this license is in
%    http://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".
%
% This Current Maintainer of this work is Heiko Oberdiek.
%
% This work consists of the main source file tabularht.dtx
% and the derived files
%    tabularht.sty, tabularht.pdf, tabularht.ins, tabularht.drv,
%    tabularht-example1.tex, tabularht-example2.tex.
%
% Distribution:
%    CTAN:macros/latex/contrib/oberdiek/tabularht.dtx
%    CTAN:macros/latex/contrib/oberdiek/tabularht.pdf
%
% Unpacking:
%    (a) If tabularht.ins is present:
%           tex tabularht.ins
%    (b) Without tabularht.ins:
%           tex tabularht.dtx
%    (c) If you insist on using LaTeX
%           latex \let\install=y\input{tabularht.dtx}
%        (quote the arguments according to the demands of your shell)
%
% Documentation:
%    (a) If tabularht.drv is present:
%           latex tabularht.drv
%    (b) Without tabularht.drv:
%           latex tabularht.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 tabularht.dtx
%       makeindex -s gind.ist tabularht.idx
%       pdflatex tabularht.dtx
%       makeindex -s gind.ist tabularht.idx
%       pdflatex tabularht.dtx
%
% Installation:
%    TDS:tex/latex/oberdiek/tabularht.sty
%    TDS:doc/latex/oberdiek/tabularht.pdf
%    TDS:doc/latex/oberdiek/tabularht-example1.tex
%    TDS:doc/latex/oberdiek/tabularht-example2.tex
%    TDS:source/latex/oberdiek/tabularht.dtx
%
%<*ignore>
\begingroup
  \def\x{LaTeX2e}
\expandafter\endgroup
\ifcase 0\ifx\install y1\fi\expandafter
         \ifx\csname processbatchFile\endcsname\relax\else1\fi
         \ifx\fmtname\x\else 1\fi\relax
\else\csname fi\endcsname
%</ignore>
%<*install>
\input docstrip.tex
\Msg{************************************************************************}
\Msg{* Installation}
\Msg{* Package: tabularht 2006/12/22 v2.3 Tabular with height specification (HO)}
\Msg{************************************************************************}

\keepsilent
\askforoverwritefalse

\preamble

This is a generated file.

Copyright (C) 2005, 2006 by Heiko Oberdiek <oberdiek@uni-freiburg.de>

This work may be distributed and/or modified under the
conditions of the LaTeX Project Public License, either
version 1.3 of this license or (at your option) any later
version. The latest version of this license is in
   http://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".

This Current Maintainer of this work is Heiko Oberdiek.

This work consists of the main source file tabularht.dtx
and the derived files
   tabularht.sty, tabularht.pdf, tabularht.ins, tabularht.drv,
   tabularht-example1.tex, tabularht-example2.tex.

\endpreamble

\generate{%
  \file{tabularht.ins}{\from{tabularht.dtx}{install}}%
  \file{tabularht.drv}{\from{tabularht.dtx}{driver}}%
  \usedir{tex/latex/oberdiek}%
  \file{tabularht.sty}{\from{tabularht.dtx}{package}}%
  \usedir{doc/latex/oberdiek}%
  \file{tabularht-example1.tex}{\from{tabularht.dtx}{example1}}%
  \file{tabularht-example2.tex}{\from{tabularht.dtx}{example2}}%
}

\obeyspaces
\Msg{************************************************************************}
\Msg{*}
\Msg{* To finish the installation you have to move the following}
\Msg{* file into a directory searched by TeX:}
\Msg{*}
\Msg{*     tabularht.sty}
\Msg{*}
\Msg{* To produce the documentation run the file `tabularht.drv'}
\Msg{* through LaTeX.}
\Msg{*}
\Msg{* Happy TeXing!}
\Msg{*}
\Msg{************************************************************************}

\endbatchfile
%</install>
%<*ignore>
\fi
%</ignore>
%<*driver>
\NeedsTeXFormat{LaTeX2e}
\ProvidesFile{tabularht.drv}%
  [2006/12/22 v2.3 Tabular with height specification (HO)]
\documentclass{ltxdoc}
\usepackage{holtxdoc}
\begin{document}
  \DocInput{tabularht.dtx}
\end{document}
%</driver>
% \fi
%
% \CheckSum{647}
%
% \CharacterTable
%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
%   Digits        \0\1\2\3\4\5\6\7\8\9
%   Exclamation   \!     Double quote  \"     Hash (number) \#
%   Dollar        \$     Percent       \%     Ampersand     \&
%   Acute accent  \'     Left paren    \(     Right paren   \)
%   Asterisk      \*     Plus          \+     Comma         \,
%   Minus         \-     Point         \.     Solidus       \/
%   Colon         \:     Semicolon     \;     Less than     \<
%   Equals        \=     Greater than  \>     Question mark \?
%   Commercial at \@     Left bracket  \[     Backslash     \\
%   Right bracket \]     Circumflex    \^     Underscore    \_
%   Grave accent  \`     Left brace    \{     Vertical bar  \|
%   Right brace   \}     Tilde         \~}
%
% \GetFileInfo{tabularht.drv}
%
% \title{The \xpackage{tabularht} package}
% \date{2006/12/22 v2.3}
% \author{Heiko Oberdiek\\\xemail{oberdiek@uni-freiburg.de}}
%
% \maketitle
%
% \begin{abstract}
% This package defines some environments that adds
% a height specification to tabular and array.
% \end{abstract}
%
% \tableofcontents
%
% \section{Usage}
%
% \begin{quote}
%   |\usepackage{tabularht}|
% \end{quote}
% The package provides the following environments
% that extend the tabular/array environment by
% a height specification as first argument:
% \begin{itemize}
% \item |tabularht|, |tabularht*|
% \item |arrayht|
% \item |tabularhtx|
%       (if package \xpackage{tabularx} is loaded)
% \end{itemize}
% The height argument allows a length specification,
% package \xpackage{calc} is supported if used. This means,
% the tabular will have the specified height.
% You can also use the prefixes |to=| and |spread=|.
% |to=| is the default, |spread=| means, the natural
% height of the tabular box is changed by the length
% after |spread=|.
%
% Examples:
% \begin{quote}
% \begin{tabular}{@{}l@{ $\rightarrow$ }l@{}}
%   |\begin{tabularht}{1in}|
%   & height is 1in\\
%   |\begin{tabularht}{to=1in}|
%   & height is 1in\\
%   |\begin{tabularht}{spread=0pt}|
%   & natural height, same as |\begin{tabular}|\\
%   |\begin{tabularht}{spread=1in}|
%   & natural height increased by 1in
% \end{tabular}
% \end{quote}
%
% Hint:  See also package \xpackage{tabularkv}, it provides an interface,
%        where most parameters for the environments can be given
%        by key-value pairs.
%
% \begin{declcs}{interrowspace}\,|{|\dots|}|
% \end{declcs}
% Adds space between table rows. It is essentially
% the same as |\noalign{\vspace{...}}|.
% \begin{declcs}{interrowfill}
% \end{declcs}
% Short for |\interrowspace{\fill}|
% \begin{declcs}{interrowstart}\,\dots\,\cs{interrowstop}
% \end{declcs}
% Marker commands, useful for option \xoption{vlines}.
%
% \subsection{Option \xoption{vlines}}
%
% Warning: This stuff is experimental.
%
% \vspace{2ex}
% \noindent
% Vertical lines are interrupted, if space is inserted
% in \cs{noalign}, \cs{interrowspace}, \cs{addlinespace}
% (\xpackage{booktabs}),
% between double \cs{hline}s. This option tries to detect
% and add the vertical lines. The lines in a tabular
% with \xpackage{tabularht} support (environments of this package)
% are numbered from left to right. The gap that is
% controlled by \cs{interrowspace} or inbetween \cs{interrowstart}
% and \cs{interrowstop} is then filled with the detected
% vertical lines.
%
% If only a limited selection of the lines should be
% drawn, the commands know an optional argument with a
% list of line numbers, e.g.
% \begin{quote}
%\begin{verbatim}
%\begin{tabularht}{50mm}{|l|l|}
%  Hello & World\\
%  \interrowfill[1,3]
%  Foo & Bar
%\end{tabularht}
%\end{verbatim}
% \end{quote}
% There are three lines, but the middle line is not drawn
% in the gap between the first and second row.
% Zero can be used to suppress all lines:
% \begin{quote}
% |\interrowspace[0]{10mm}|
% \end{quote}
% The syntax of the commands with the optional argument
% with the line number list \meta{list}. \meta{list} is a comma
% separated list of numbers, \meta{height} means the
% height specification described above with the optional
% prefixes |to=| or |spread=|.
% \begin{quote}
%   \cs{interrowspace}\,|[|\meta{list}|]|\,|{|\meta{height}|}|\\
%   \cs{interrowfill}\,|[|\meta{list}|]|\\
%   \cs{interrowstart}\,|[|\meta{list}|]|\,\dots\,\cs{interrowstop}
% \end{quote}
%
% Option \xoption{vlines} is driver dependent and uses \eTeX\ features.
% \begin{description}
% \item[\xoption{pdftex}:] \pdfTeX\ in PDF mode.
%   Here the positions of the lines are written with the
%   help of the \cs{pdfsavepos} feature into the \xfile{.aux} file(s).
%   Therefore you need two LaTeX runs to get the lines.
% \item[\xoption{dvips}:]
%   Here, PostScript's currentpoint it used to get
%   the line positions. The lines are then drawn at the end
%   of the page. Thus one \LaTeX/dvips run is sufficient
%   for this option.
% \item[Other drivers:]\mbox{}
%   \begin{description}
%   \item[PostScript drivers:] probably possible, an end of page
%     hook would be nice.
%   \item[\VTeX:] with GeX (PostScript interpreter) probably possible.
%   \item[dvipdfm:] no idea. The big problem is, how to get the
%     current position?
%   \end{description}
% \end{description}
%
% \subsection{Limitations}
%
% \begin{itemize}
% \item
%   Vertical lines are interrupted by |\noalign{\vfill}|.
% \end{itemize}
%
% \subsection{Compatibility}
%
% \begin{itemize}
% \item
%   \xpackage{array}, \xpackage{delarray}, \xpackage{tabularx}
%   are supported.
% \item There can be problems with packages that
%   redefine \cs{@array} (or \cs{@@array}, \cs{@tabarray}) and
%   \cs{@arrayrule} (for option \xoption{vlines}).
% \item \xpackage{colortbl}: it should at least work, but there isn't
%   support for filling the gaps with color, neither
%   the rules nor the backgrounds.
% \end{itemize}
%
% \subsection{Examples}
%
% \subsubsection{Example 1}
%
%    \begin{macrocode}
%<*example1>
\documentclass{article}
\usepackage{tabularht}

\begin{document}
\fbox{%
  \begin{tabularht*}{1in}{4in}{@{}l@{\extracolsep{\fill}}r@{}}
    upper left corner & upper right corner\\%
    \noalign{\vfill}%
    \multicolumn{2}{@{}c@{}}{bounding box}\\
    \noalign{\vfill}%
    lower left corner & lower right corner\\
  \end{tabularht*}%
}
\end{document}
%</example1>
%    \end{macrocode}
%
% \subsubsection{Example 2}
%
%    \begin{macrocode}
%<*example2>
\documentclass{article}
\usepackage{booktabs}
\usepackage[dvips,vlines]{tabularht}

\begin{document}

\begin{tabularht}{spread=0pt}{|l|l|}
  \hline
  First&Line\\
  \hline
\interrowstart
  \addlinespace[10mm]
\interrowstop
  \hline
  Second&Line\\
\interrowstart
  \hline
  \hline
\interrowstop
  Third&Line\\
  \hline
\interrowspace{10mm}
  \hline
  Fourth&Line\\
  \hline
\end{tabularht}

\end{document}
%</example2>
%    \end{macrocode}
%
% \StopEventually{
% }
%
% \section{Implementation}
%
%    \begin{macrocode}
%<*package>
%    \end{macrocode}
%    Package identification.
%    \begin{macrocode}
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{tabularht}%
  [2006/12/22 v2.3 Tabular with height specification (HO)]
%    \end{macrocode}
%
% \subsection{Environments}
%
%    \begin{macrocode}
\let\@toarrayheight\@empty
\let\tabH@array@init\@empty

\toks@={%
  \begingroup
    \long\def\x#1\vcenter\fi\fi\bgroup#2\@sharp#3#4\@nil{%
      \endgroup
      \gdef\@array[##1]##2{%
        \tabH@array@init
        #1%
        \vcenter\fi\fi
        \@toarrayheight
        \bgroup
        \let\@toarrayheight\@empty
        #2\@sharp###3#4%
      }%
    }%
  \expandafter\x\@array[#1]{#2}\@nil
}
\edef\tabH@patch@array{\the\toks@}
\def\tabH@patch@@array{%
  \ifx\@array\@@array
    \def\reserved@a{\let\@@array\@array}%
  \else
    \let\reserved@a\relax
  \fi
  \tabH@patch@array
  \reserved@a
}
\tabH@patch@@array

\@ifpackageloaded{array}{}{%
  \AtBeginDocument{%
    \@ifpackageloaded{array}{%
      \tabH@patch@@array
    }{}%
  }%
}

\def\tabH@setheight#1{%
\tracingmacros=1
  \tabH@@setheight#1==\@nil
}
\def\tabH@@setheight#1=#2=#3\@nil{%
  \ifx\\#2#3\\%
    \setlength{\dimen@}{#1}%
    \edef\@toarrayheight{to\the\dimen@}%
  \else
    \edef\tabH@temp{\zap@space#1 \@empty}%
    \ifx\tabH@temp\tabH@to
    \else
      \ifx\tabH@temp\tabH@spread
      \else
        \PackageError{tabularht}{%
          Unknown height specifier %
          `\expandafter\strip@prefix\meaning\tabH@temp'%
        }{%
          The height dimension for tabular height can be prefixed%
          \MessageBreak
          with `to=' or `spread=', default is `to='.%
        }%
        \let\tabH@temp\tabH@to
      \fi
    \fi
    \setlength{\dimen@}{#2}%
    \edef\@toarrayheight{\tabH@temp\the\dimen@}%
  \fi
}
\def\tabH@to{to}
\def\tabH@spread{spread}
%    \end{macrocode}
%    First argument is the height of the table,
%    then the orignal arguments for tabular follow.
%    \begin{macrocode}
\newenvironment{tabularht}[1]{%
  \tabH@setheight{#1}%
  \tabular
}{%
  \endtabular
}

\newenvironment{tabularht*}[1]{%
  \tabH@setheight{#1}%
  \@nameuse{tabular*}%
}{%
  \@nameuse{endtabular*}%
}

\newenvironment{tabularhtx}[1]{%
  \tabH@setheight{#1}%
  \tabularx
}{%
  \endtabularx
}

\newenvironment{arrayht}[1]{%
  \tabH@setheight{#1}%
  \array
}{%
  \endarray
}

\def\interrowspace{%
  \noalign\bgroup
    \tabH@interrowspace
}
\newcommand*{\tabH@interrowspace}[2][]{%
    \tabH@vspace{#1}{#2}%
  \egroup
}
\def\interrowfill{%
  \noalign\bgroup
    \tabH@interrowfill
}
\newcommand*{\tabH@interrowfill}[1][]{%
    \tabH@vspace{#1}{\fill}%
  \egroup
}
\def\tabH@vspace#1#2{%
  \tabH@vspace@start{#1}%
  \vspace{#2}%
  \tabH@vspace@stop
}
\let\tabH@vspace@start\@gobble
\let\tabH@vspace@stop\@empty

\newcommand*{\interrowstart}{%
  \noalign\bgroup
    \tabH@interrowstart
}
\newcommand*{\tabH@interrowstart}[1][]{%
    \tabH@vspace@start{#1}%
  \egroup
}
\newcommand*{\interrowstop}{%
  \noalign{\tabH@vspace@stop}%
}
%    \end{macrocode}
%
% \subsection{Options}
%
%    \begin{macrocode}
\providecommand*{\tabH@driver}{}

\DeclareOption{vlines}{%
  \let\tabH@temp\relax
}
\DeclareOption{pdftex}{}
\DeclareOption{dvips}{%
  \def\tabH@driver{dvips}%
}
\ProcessOptions*\relax

\ifx\tabH@temp\relax
\else
  \expandafter\endinput
\fi

\begingroup
  \@ifundefined{eTeXversion}{%
    \PackageError{tabularht}{%
      Option `vlines' requires eTeX%
    }{%
      Use of eTeX is recommended for LaTeX, see ltnews16.%
    }%
    \endgroup
    \endinput
  }{}%
\endgroup
%    \end{macrocode}
%
% \subsection{Option vlines, driver independent stuff}
%
%    \begin{macrocode}
\newcounter{tabH@unique}
\setcounter{tabH@unique}{0}
\let\tabH@currenttab\@empty

\def\tabH@array@init{%
  \ifx\@toarrayheight\@empty
    % ignore vertical lines of nested tabular environments
    \let\tabH@currenttab\@empty
  \else
    \stepcounter{tabH@unique}%
    \edef\tabH@currenttab{\the\c@tabH@unique}%
  \fi
}

\renewcommand*{\@arrayrule}{%
  \@addtopreamble{%
    \hskip -.5\arrayrulewidth
    \ifx\tabH@currenttab\@empty
    \else
      \tabH@vrule{\tabH@currenttab}%
    \fi
    \begingroup
      \expandafter\ifx\csname CT@arc@\endcsname\relax
      \else
        \expandafter\CT@arc@
      \fi
      \vline
    \endgroup
    \hskip -.5\arrayrulewidth
  }%
}
\let\tabH@arrayrule\@arrayrule
\AtBeginDocument{%
  \@ifpackageloaded{colortbl}{%
    \let\@arrayrule\tabH@arrayrule
  }{}%
}

\let\tabH@vrule\@gobble
%    \end{macrocode}
%
% \subsection{Driver pdftex}
%
%    \begin{macrocode}
\RequirePackage{ifpdf}
\ifpdf
  \begingroup
    \@ifundefined{pdfsavepos}{%
      \PackageError{tabularht}{%
        Your pdfTeX is too old%
      }{%
        \string\pdfsavepos\space is missing.%
      }%
      \endgroup
      \csname fi\endcsname
      \endinput
    }{}%

    \let\on@line\@empty
    \PackageInfo{tabularht}{%
      Using driver `pdftex' because of pdfTeX in PDF mode%
    }%
  \endgroup

  \protected\def\tabH@vrule#1{%
    \if@filesw
      \pdfsavepos
      \protected@write\@auxout{%
        \let\tabH@lastxpos\relax
      }{%
        \tabH@aux@vrule{#1}{\tabH@lastxpos}%
      }%
    \fi
  }

  \def\tabH@lastxpos{\the\pdflastxpos}
  \def\tabH@lastypos{\the\pdflastypos}

  % The .aux file contains three commands:
  % \tabH@aux@vrule{tabular id}{x position}
  % \tabH@aux@vstart{tabular id}{row id}{x position}{y position}
  % \tabH@aux@vstop{y position}
  %
  \AtBeginDocument{%
    % The .aux files are read the first time before
    % \AtBeginDocument and later at \end{document}.
    % \tabH@aux@done is a marker to distinguish
    % between these two readings. Only in the first
    % case we need the \tabH@aux@... commands.
    \let\tabH@aux@done\@empty
    \if@filesw
      \immediate\write\@mainaux{%
        \@percentchar\@percentchar BeginProlog: tabularht
      }%
      % items in the aux file are executed,
      % if tabularht is loaded
      % and during the aux file read at \begin{document} only
      \immediate\write\@mainaux{%
        \detokenize{%
          % the \tabH@aux@... commands are needed only if
          % tabularht is loaded with driver pdftex.
          \@ifundefined{tabH@aux@vrule}\@secondoftwo\@firstofone
          {%
            % disable commands except for the first .aux files reading
            \@ifundefined{tabH@aux@done}\@gobble\@firstofone
          }%
          {%
            \let\tabH@aux@vrule\@gobbletwo
            \let\tabH@aux@vstart\@gobblefour
            \let\tabH@aux@vstop\@gobble
          }%
        }%
      }%
      \immediate\write\@mainaux{%
        \@percentchar\@percentchar EndProlog: tabularht
      }%
    \fi
  }

  % the x positions of vrules are stored in
  % \tabH@<tabcount>list with distinct values
  \protected\def\tabH@aux@vrule#1#2{%
    \@ifundefined{tabH@#1list}{%
      \expandafter\xdef\csname tabH@#1list\endcsname{%
        \noexpand\do{#2}%
      }%
    }{%
      \begingroup
        \def\x{#2}%
        \let\y\@undefined
        \let\do\tabH@do@add
        \expandafter\xdef\csname tabH@#1list\endcsname{%
          \csname tabH@#1list\endcsname\@empty
          \ifx\y\@undefined
            \noexpand\do{\x}%
          \fi
        }%
      \endgroup
    }%
  }
  \def\tabH@do@add#1{%
    \ifx\y\@undefined
      \ifnum#1<\x\space
      \else
        \expandafter\ifx\csname y\endcsname\relax\fi
        \ifnum#1>\x\space
          \noexpand\do{\x}%
        \fi
      \fi
    \fi
    \noexpand\do{#1}%
  }

  \def\tabH@vspace@start#1{%
    \if@filesw
      \stepcounter{tabH@unique}%
      \edef\tabH@currentrow{\the\c@tabH@unique}%
      \pdfsavepos
      \protected@write\@auxout{%
        \let\tabH@lastxpos\relax
        \let\tabH@lastypos\relax
      }{%
        \tabH@aux@vstart{\tabH@currenttab}{\tabH@currentrow}%
                        {\tabH@lastxpos}{\tabH@lastypos}%
      }%
    \fi
    \begingroup
      \edef\a{tabH@\tabH@currenttab row\tabH@currentrow}%
      \expandafter\let\expandafter\x\csname\a x\endcsname
      \ifx\x\relax
      \else
        \expandafter\let\expandafter\y\csname\a y\endcsname
        \expandafter\let\expandafter\l
            \csname tabH@\tabH@currenttab list\endcsname
        \ifx\l\relax
        \else
          \def\f{#1}%
          \ifx\f\@empty
            \let\do\tabH@do@set
          \else
            \count@=\z@
            \let\do\tabH@do@filter
          \fi
          \setbox\z@=\hbox{\l}%
          \wd\z@=\z@
          \dp\z@=\z@
          \copy\z@
        \fi
      \fi
    \endgroup
  }%
  \def\tabH@vspace@stop{%
    \if@filesw
      \pdfsavepos
      \protected@write\@auxout{%
        \let\tabH@lastypos\relax
      }{%
        \tabH@aux@vstop{\tabH@lastypos}%
      }%
    \fi
  }
  \def\tabH@do@set#1{%
    \hbox to \z@{%
      \hskip \dimexpr #1sp - \x sp\relax
      \vrule \@width\arrayrulewidth
             \@depth\dimexpr \y sp\relax
      \hss
    }%
  }
  \def\tabH@do@filter{%
    \@tempswafalse
    \advance\count@\@ne
    \@for\e:=\f\do{%
      \ifnum\e=\count@
        \@tempswatrue
      \fi
    }%
    \if@tempswa
      \expandafter\tabH@do@set
    \else
      \expandafter\@gobble
    \fi
  }

  \protected\def\tabH@aux@vstart#1#2#3#4{%
    \def\tabH@current@vstart{{#1}{#2}{#3}{#4}}%
  }
  \protected\def\tabH@aux@vstop{%
    \expandafter\tabH@aux@v\tabH@current@vstart
  }
  \def\tabH@aux@v#1#2#3#4#5{%
    \expandafter\gdef\csname tabH@#1row#2x\endcsname{#3}%
    \expandafter\xdef\csname tabH@#1row#2y\endcsname{%
      \the\numexpr #4 - #5\relax
    }%
  }

  \csname fi\endcsname
  \endinput

\fi
%    \end{macrocode}
%
% \subsection{DVI drivers}
%
%    \begin{macrocode}
\ifx\tabH@driver\@empty
  \PackageError{tabularht}{%
    Missing DVI driver, option `vlines' disabled%
  }{%
    Supported DVI drivers: dvips.%
  }%
  \expandafter\endinput
\fi

\def\tabH@driver@dvips{%
  \def\tabH@literalps##1{\special{ps:SDict begin ##1 end}}%
  \def\tabH@headerps##1{\special{! ##1}}%
}

\@onelevel@sanitize\tabH@driver
\@ifundefined{tabH@driver@\tabH@driver}{%
  \PackageError{tabularht}{%
    Unsupported driver `\tabH@driver'%
  }{%
    Supported DVI drivers: dvips.%
  }%
  \endinput
}{}

\begingroup
  \let\on@line\@empty
  \PackageInfo{tabularht}{%
    Using driver `\tabH@driver'%
  }%
\endgroup
\csname tabH@driver@\tabH@driver\endcsname

\protected\def\tabH@vrule#1#2\vrule#3\arrayrulewidth{%
  #2% \fi or empty
  % hack to get rid of maxdrift rounding of dvips,
  % thus simulate a large motion
  \kern1in\relax
  \tabH@literalps{%
    #1 tabH.vrule
    Resolution neg 0 translate%
  }%
  \vrule#3\arrayrulewidth
  \tabH@literalps{Resolution 0 translate}%
  \kern-1in\relax
}

\def\tabH@vspace@start#1{%
  \begingroup
    \let\y\@empty
    \@for\x:=#1\do{%
      \ifx\y\@empty
        \edef\y{\x}%
      \else
        \edef\y{\y\space\x}%
      \fi
    }%
    \tabH@literalps{\tabH@currenttab[\y]currentpoint exch pop}%
  \endgroup
}
\def\tabH@vspace@stop{%
  \tabH@literalps{%
    currentpoint exch pop %
    \number\dimexpr\arrayrulewidth\relax\space
    tabH.vspace%
  }%
}

\tabH@headerps{%
  userdict begin
    /tabH.list 10 dict def
    /tabH.job [] def
  end%
  /tabH.vrule{%
    10 string cvs cvn dup tabH.list exch known{%
      tabH.list exch dup [ exch tabH.list exch get
      currentpoint pop round exch true exch{%
        % tabH.list key [ ... x true i
        % tabH.list key [ ... false i
        exch{%
          % ... [ ... x i
          2 copy lt{false}{%
            2 copy eq{pop false}{exch true}ifelse%
          }ifelse
        }{false}ifelse
      }forall
      pop%
      ]put%
    }{%
      tabH.list exch[currentpoint pop round]put
    }ifelse
  }bind def
  % <tab num> <cols array> <ytop> <ybottom> <rulewidth[sp]>
  /tabH.vspace{%
    userdict begin
      10 dict dup begin
        exch 65536 div Resolution mul 72.27 div
        % dvips uses a poor man's ceil function
        % see dopage.c before "drawrule": (int)(... + 0.9999999)
        0.9999999 add truncate%
        /rulewidth exch def
        exch/ybottom exch def
        exch/ytop exch def
        exch/cols exch def
        exch/tabkey exch 10 string cvs cvn def
      end
      /tabH.job exch[exch userdict/tabH.job get aload pop]def
    end%
  }bind def
  % Now we do the work at the end of the page.
  % Unhappily "eop-hook" cannot be used, because "eop"
  % executes "restore" before, so that all data are lost.
  TeXDict begin%
    /eop%
    [%
      {%
        tabH.job{%
          begin%
           /colarray
             tabH.list tabkey known{tabH.list tabkey get}{[]}ifelse
           def
           cols length 0 eq not{%
             /colarray[%
               cols{1 sub
                 dup 0 lt{pop}{%
                   dup colarray length ge{pop}{%
                     colarray exch get%
                   }ifelse%
                 }ifelse%
               }forall%
             ]def%
           }if
           colarray{%
             % (rulewidth) == rulewidth == % debug
             Resolution sub
             ytop rulewidth ytop ybottom sub v
           }forall
          end
        }forall
        % tabH.list{== ==}forall % debug
      }bind aload pop
      TeXDict /eop get aload pop
    ]cvx def
  end%
}
%    \end{macrocode}
%
%    \begin{macrocode}
%</package>
%    \end{macrocode}
% \section{Installation}
%
% \paragraph{CTAN.} This package is available on
% CTAN\footnote{\url{ftp://ftp.ctan.org/tex-archive/}}:
% \begin{description}
% \item[\CTAN{macros/latex/contrib/oberdiek/tabularht.dtx}] The source file.
% \item[\CTAN{macros/latex/contrib/oberdiek/tabularht.pdf}] Documentation.
% \end{description}
%
% \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 tabularht.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}
% \sbox0{^^A
% \begin{tabular}{@{}>{\ttfamily}l@{$\quad\rightarrow\quad$}>{\ttfamily}l@{}}
%   tabularht.sty & tex/latex/oberdiek/tabularht.sty\\
%   tabularht.pdf & doc/latex/oberdiek/tabularht.pdf\\
%   tabularht-example1.tex & doc/latex/oberdiek/tabularht-example1.tex\\
%   tabularht-example2.tex & doc/latex/oberdiek/tabularht-example2.tex\\
%   tabularht.dtx & source/latex/oberdiek/tabularht.dtx\\
% \end{tabular}^^A
% }%
% \ifdim\wd0>\linewidth
%   \mbox{}\nobreak\hskip0pt minus\leftmargin
%   \usebox0
%   \nobreak\hskip0pt minus\rightmargin
% \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.
%
% \paragraph{Refresh file databases.} If your \TeX~distribution
% (\teTeX, \mikTeX, \dots) rely on file databases, you must refresh
% these. For example, \teTeX\ users run \verb|texhash| or
% \verb|mktexlsr|.
%
% \subsection{Some details for the interested}
%
% \paragraph{Attached source.}
%
% The PDF documentation on CTAN also includes the
% \xfile{.dtx} source file. It can be extracted by
% AcrobatReader 6 or higher. Another option is \textsf{pdftk},
% e.g. unpack the file into the current directory:
% \begin{quote}
%   \verb|pdftk tabularht.pdf unpack_files output .|
% \end{quote}
%
% \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{tabularht.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 tabularht.dtx
%makeindex -s gind.ist tabularht.idx
%pdflatex tabularht.dtx
%makeindex -s gind.ist tabularht.idx
%pdflatex tabularht.dtx
%\end{verbatim}
% \end{quote}
%
% \begin{History}
%   \begin{Version}{2005/09/22 v1.0}
%   \item
%     First public version.
%   \end{Version}
%   \begin{Version}{2005/10/16 v2.0}
%   \item
%     Height specification allows
%     |to=...| or |spread=...|, default is |to=|.
%   \item
%     Option \xoption{vlines} added,
%     drivers \xoption{pdftex} and \xoption{dvips}.
%   \item
%     \cs{interrowspace}, \cs{interrowfil}, and
%     \cs{interrowstart}\dots\cs{interrowstop} added.
%   \end{Version}
%   \begin{Version}{2005/10/18 v2.1}
%   \item
%     Fix for package \xpackage{colortbl}, but the colors
%     of \xpackage{colortbl} remain unsupported.
%   \end{Version}
%   \begin{Version}{2006/02/20 v2.2}
%   \item
%     Code is not changed.
%   \item
%     DTX framework.
%   \end{Version}
%   \begin{Version}{2006/12/22 v2.3}
%   \item
%     Documentation fix.
%   \item
%     Fix in code of option vlines.
%   \end{Version}
% \end{History}
%
% \PrintIndex
%
% \Finale
\endinput
