Re: [Swig-user] Returning fixed size array in C#

[Mathieu M. <mat...@gm...>]

On Thu, Dec 11, 2008 at 7:35 AM, Antti Karanta <ant...@na...> wrote:
>
> On Wed, 10 Dec 2008 12:21:06 +0200, Mathieu Malaterre
> <mathieu.malaterre@xxxx> wrote:
>
>>   I would like to wrap something like this in C#:
>>
>> const double *get6()
>> {
>>   static const double bla[6] = {};
>>   return bla;
>> }
>>
>> I would like to tell the wrapped layer that this is an array of 6
>> elements (no more, no less).
>>
>> Could someone please point me to the documentation for this. All I can
>> find is something related to python (not C#).
>
>   Arrays are supported in swig svn head. If you want to use the current
> release you have to make your own typemaps (or copy paste from svn head.
> Note that the FIXED typemaps won't work on curren't swig release).
>
>   See documentation about handling arrays
> https://swig.svn.sourceforge.net/svnroot/swig/trunk/Doc/Manual/CSharp.html
>   and the typemaps
> https://swig.svn.sourceforge.net/svnroot/swig/trunk/Lib/csharp/arrays_csharp.i
>
>   There's support only for array parameters, though. If you need support
> for array return values, I think you have to roll your own typemaps.
>
>   Or, you can write a simple wrapper function that copies the content of
> the returned array to a parameter array, e.g.
>
> void get6_helper( double* bla ) {
>   double originals = get6() ;
>   memcpy( bla, originals, 6 * sizeof( double ) ) ;
> }
>
>   and wrap that using the provided typemaps.

The svnroot link did not work for me (HTML would not be rendered)
instead I had to use:
http://swig.svn.sourceforge.net/viewvc/swig/trunk/Doc/Manual/CSharp.html

Anyway thanks for the link, but I still do not see how to remap the
function parameter as a return arg in the C# later.

I would like to use the get6() function in C# (for consistency in the
different wrapped language):

uint[] out = get6();

Thanks again !
-- 
Mathieu