Right-align numbers in ToC

Question

How do I right-align the section/subsection/.. number in the ToC? The distance between the number and the heading should be fixed.

Instead of

|  1     Section
|        1.1      Subsection

I'd like to have something like

|      1 Section
|             1.1 Subsection

(|= left margin)

There must be a package for that...

(And I'd like to play with the indentation as well)

Answer 1

\numberline could be redefined:

\documentclass{article}

\makeatletter
\renewcommand*{\numberline}[1]{%
  \hb@xt@\@tempdima{\hfil#1 }%
}
\makeatother

\begin{document}
\tableofcontents

\section{First}
\subsection{Sub}
\addtocounter{subsection}{9}
\subsection{Foo}
\addtocounter{section}{9}
\section{Next}
\subsection{bar}
\end{document}