Re: Implementation of libpointer

[John W. Eaton]

On 09/24/2013 05:57 AM, Reza Housseini wrote:
> Hello
>
> I try to implement the libpointer function [1]. It is used for example
> in the calllib function [2]. Therefore a new type declaration is needed
> and I was wondering where and how to implement them. Is it correct that
> it need to be placed in libinterp/octave-value? And should it be some
> derived struct class, with fixed size, like:
>
>      class
>      octave_pointer : public octave_struct
>      {
>        ...
>      }
>
> Or inherit directly from octave_map?

If you want to create a new value type in Octave, then it ultimately 
needs to be derived from octave_base_value.  So deriving from 
octave_struct could work.  It could also be derived directly from 
octave_base_value and contain an octave_scalar_map object (or can a 
libpointer object have non-scalar dimensions?)

But since it appears that the libpointer object only ever contains two 
fields, maybe it should just be a separate kind of object that doesn't 
use a structure for its implementation.

Is libpointer a handle class object in Matlab?  If so, you'll have some 
difficulty getting full compatibility

If you are working on calllib and would eventually like for it to be a 
part of Octave, maybe it would be helpful if you would share your code 
with us so we could provide some early feedback.

jwe