[omniORB] Sequences of short transfered via strings...

[Laurent Pointal]

Hello,

I'm back with my problem of moving an image from a C++ CORBA server to a 
Python OmniORBpy client.

The image is coded as a sequence<short>, and the conversion from the ORB 
internal buffer to the mapped Python type (list of integers - and back to a 
compressed Numeric.array) cost really too much time (image is around 
1200x1200 pixels of 16 bits).

Do you thing it is reasonable to transfert the image as one large 
CORBA::string ?

-Numeric.fromstring can directly get a binary string to build an array,
-there will be again memory copy, but no construction of the temporary list 
of 1440000 objects,
-i know that it is a hack, far from normal use (I may encounter byte 
swapping problems), but I dont see another solution.

Another possible problem, can CORBA strings contain caracters with code 0 ?
And how can I build such a string (giving buffer start and bytes length) ? 
(...in Orbacus :-))


Thanks.

Laurent.

PS. I may not be the only one with this problem, is a there a project to 
use an alternate Python binding for sequences (at least as an array.array), 
where can I do such a proposition?



---
Laurent POINTAL - CNRS/LURE - Service Informatique Experiences
Tel/fax: 01 64 46 82 80 / 01 64 46 41 48
email  : laurent.pointal@lure.u-psud.fr  ou laurent.pointal@laposte.net