Listings on multiple pages - keep number like Continuedfloat

Question

I have the following code:

{
    \lstset{language=C,
            basicstyle=\tiny,
            tabsize=3,
            frame=lines,
            breaklines=true,
            breakatwhitespace=true}

    \lstinputlisting[float,caption={Caption1},label=txt:Netlink,lastline=69]{file.c}
}

{
    \lstset{language=C,
            basicstyle=\tiny,
            tabsize=3,
            frame=lines,
            breaklines=true,
            breakatwhitespace=true}
\ContinuedFloat
    \lstinputlisting[float,caption={Caption 1 (cont.)},label=txt:Netlink,firstline=71]{code.c}
}

It produces something like:

        Listing 1.1: Caption 1
The code 

        Listing 1.2: Caption 1 (cont.)
The code 

I want it to be like if you use \Continuedfloat

        Listing 1.1: Caption 1
The code 

        Listing 1.1: Caption 1 (cont.)
The code 

And then on list of listings I would like it to be shown just once.

I have no idea on how to do it. Any help is more than welcome.

Edit 1: (for @GonzaloMedina)

This is the result including \lstlistoflistings

Would it be possible to have only one entry there?

Answer 1

I defined two commands \savecount and \contcap. After the first part of the code, invoke \savecont (this simply stores the current value of the lstlisting counter). For the continued parts, inside a group invoke \contcap (this produces the appropriate counter value and uses a special caption format to produce the desired "(Cont.)" text):

\documentclass{article}
\usepackage{listings,caption}

\DeclareCaptionFormat{cont}{#1~(cont.)#2#3 }

\newcounter{tmp}

\newcommand\savecount{\setcounter{tmp}{\value{lstlisting}}}
\newcommand\contcap{%
\setcounter{lstlisting}{\value{tmp}}
\addtocounter{lstlisting}{-1}
\captionsetup[lstlisting]{format=cont}}

 \lstset{language=C,
            basicstyle=\tiny,
            tabsize=3,
            frame=lines,
            breaklines=true,
            breakatwhitespace=true
}

\begin{document}
\lstlistoflistings

\lstinputlisting[float,caption={the first part of a listing},label=txta:Netlink,lastline=2]{code.c}
\savecount

\begingroup
\contcap
\lstinputlisting[float,nolol,caption={the second part of a listing},label=txtb:Netlink,firstline=3,lastline=5]{code.c}
\endgroup

\begingroup
\contcap
\lstinputlisting[float,nolol,caption={the third part of a listing},label=txtc:Netlink,firstline=6]{code.c}
\endgroup

\end{document}

To prevent multiple entries in an eventual List of listings, use the nolol key for the continuations.