-----Original Message----- Message: 2 Date: Sat, 22 Dec 2007 00:00:09 +0200 From: "Roman Yakovenko" Subject: Re: [C++-sig] Exposing C Array members to python using boost To: "Development of Python/C++ integration" <c++-sig@python.org> Message-ID: <7465b6170712211400p429b0abdg232e24692b407e06@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1

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Here is my situation: I'm trying to wrap some legacy C-structures that define a network packet structure that will be written by python and read by some embedded computer. I have no control over the definition of these structures, nor can I add to or change the header files. My hang-up is

On Dec 20, 2007 1:41 AM, Carpman, David wrote: that some of the members in these structures are defined as C-arrays, for example, int numsamples[32]. I would like to have access in python to the elements of these arrays for reading and writing. Scalar primitive members work fine.

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I would like to avoid having to write C++ wrapper classes for the C- structs containing the C-arrays, as there are many dozens of them. I'd be very thankful if someone could help!

Take a look on next code:

http://pygccxml.svn.sourceforge.net/viewvc/pygccxml/pyplusplus_dev/pyplusp lus/code_repository/array_1.py?revision=1097&view=markup

search for register_array_1 function.

You can also to try Py++(http://language-binding.net/pyplusplus/pyplusplus.html), code generator for Boost.Python library, it handles such cases automatically.

-- Roman Yakovenko C++ Python language binding http://www.language-binding.net/

Thanks very much for the reply, Roman. I tried Py++ and it indeed automatically handles the case I outlined above concerning C-array members, and with much less tedious writing of registration code. I also found it convenient to use to insert some other C++ code for each of my structures that normally I wrote by hand. The API docs and examples on your webpage were very helpful. Warm regards, David Carpman