Re: [Swig-user] How to use **void

[RobMarshall <Rob...@ig...>]

OK, so I solved the problem myself by using a wrapper, e.g.:

%rename(db_connect) PyDbConnect;
%inline %{
    db_store_internal *PyDbConnect(char *name) {
        db_store *store = NULL;
        db_connect(name, &store);
        return (db_store_internal *)store;
%}

It's actually a little more complicated than that because I keep a global
list of open store's and free the memory via another wrapper that does the
disconnect...but that's basically how I got around this.

Rob


RobMarshall wrote:
> 
> Hi,
> 
> I'm new to SWIG and I'm trying to use Python to access
> a C library. One of the variables is defined as:
> 
> typedef void db_store;
> 
> When connecting to the database the call is:
> 
> db_connect(char *name, db_store **store)
> 
> When I create the shared library the definition of
> db_store is never created, so when I try to do the
> following in python:
> 
>  >>> store = db_store
> 
> I get:
> 
> NameError: name 'db_store' is not defined
> 
> And if I simply try to call the connect I get:
> 
>  >>> db_connect("",store)
> 
> NameError: name 'store' is not defined
> 
> BTW, db_store ends up getting pointed at an internal
> struct, db_store_internal, that has members and does
> show up, but I can't use:
> 
>  >>> store = db_store_internal
>  >>> store
> <class 'db.db_store_internal'>
>  >>> db_connect("",store)
> 
> because it then says:
> 
> TypeError: in method 'db_connect', argument 2 of type 'db_store **'
> 
> How do I do this?
> 
> Thanks,
> 
> Rob
> 
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