OpenEuphoria

Re: How to deal with C_POINTR?

• Posted by Derek Parnell <ddparnell at bigpond.com> Mar 31, 2003
• 425 views

----- Original Message -----
From: <stabmaster_ at hotmail.com>
To: "EUforum" <EUforum at topica.com>
Subject: Re: How to deal with C_POINTR?


>
> >when define and call c_func often there are parameters passed by
> >pointers, then how to send and get data if it is a c struct?
>
> Let's say you have:
>
> typedef struct
> {
>   int a,b;
> } foo;
>
> foo *bar(foo *grill)
> {
>   return grill;
> }

The problem though is when you have something like ...

 foo bar(foo grill)
{
  return grill;
}

In other words, the struct is passed by value, not as a pointer to struct.

In this case, it is difficult. Sometimes, if the stuct ONLY has 32-bit
values in it, you can fake passing it as a set of C_UINT values, but
returning a struct is impossible, I suspect.

----------------
cheers,
Derek Parnell