[omniORB] problems with Matrix

[Clarke Brunt]

Tomás Dias Almeida wrote:
> I have defined a structure Image containing a matrix. But the client
> doesn't work. 
> There is an error message: " terminate called after throwing an
> instance of 'CORBA::BAD_PARAM' " and I think the problem is the
> initialization of the matrix: 
> 
>    Image img;
>    img.m[0][0] = (CORBA::Octet) 6;
>    ...
>    img.m[2][2] = (CORBA::Octet) 6;
>    img.nbl = 3;
>    img.nbc = 3;
> 
> ---- file.idl
> typedef sequence<sequence<octet>  > Matrix;
> struct Image{
>   Matrix m;
>   short _nbc;
>   short _nbl;
> };
> 
> Please help me, where can i find a solution ?

You don't appear to have allocated any memory for the sequences. This could easily be wrong, as I haven't tried it, and have never used a 'sequence of sequences' myself, but I imagine you would need something like:

Image img;
img.length(2);	// allocate two elements: you can now access img[0] and img[1]
img[0].length(2);	// allocate length of sub-sequence
img[1].length(2);	// needn't be the same length

Then fill in the elements as you were doing.

I suspect you might need to read up about the C++ binding for CORBA, as you will probably soon find other things that you won't know how to do.

-- 
Clarke Brunt, Principal Software Engineer, Trafficmaster


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