Help: correct way to handle struct return values.

[Kaz Kylheku <kaz@kylheku.com>]

Hi all,

In the current texinfo doc, the callback stub does this to
return a value of type int:

   /* Acts like puts with the file given at time of enclosure. */
   void puts_binding(ffi_cif *cif, void *ret, void* args[],
                   void *stream)
   {
     *(ffi_arg *)ret = fputs(*(char **)args[0], (FILE *)stream);
   }

Can someone show what the code would look like for a function
that returns the following type, and work everywhere: all
supported platforms, big or little endian:

   struct little { char a, b };

Obvously, this can't be used:

    *(ffi_arg *)ret = fun_returning_struct_little(...);

After everything, I'm not confident that this is correct, either:

    *(struct little *)ret = fun_returning_struct_little(...);

Also, can someone show how to extract "struct little" in after
a ffi down call? If the type is int, we can do this:

    ffi_arg rc_buf;
    int rc;
    ffi_call(&cif, puts, &rc_buf, values);
    rc = rc_buf;

But what if rc is of type "little struct"? Again, we can't just use a 
cast.

Lastly, how does any of this change for  struct bigger_struct { long x, 
y, z; }?

Thanks.