Re: [Swig-user] Accessing abstract/opaque C stuctures from python

[Bob H. <bob...@gm...>]

I can't finish this after all!!

Although it normally works fine, when I return a NULL pointer I get:

    my_foo, ret = foo_create(10, my_data)
TypeError: 'int' object is not iterable

... so I tried to return (FOO *) 1 instead of NULL and that gets past that
point but goes on to give a Seg Viol later - presumably as it tries to free
it.

Any ideas?

Here are the .h and .i files again:

foo.h:

typedef struct {
    int len;
    unsigned char *data;
} FOO;

int foo_init(int len, unsigned char *data, FOO **foo);
int foo_fini(FOO *foo); /* free up the structure */
FOO *foo_generate();
void print_foo(FOO *foo);

foo.i:

%module foo
%include "typemaps.i"
%include "carrays.i"
%array_functions(unsigned char, data_array);

%{
#include "foo.h"
%}

FOO *foo_create(int len, unsigned char *data, int *OUTPUT);
%inline %{
FOO *foo_create(int len, unsigned char *data, int *ret) {

        *ret = 1;
        return(NULL);
}
%}


%include "foo.h"