From: Tim Hunter <cyclists@...>
Date: 2005-02-09T22:20:11+09:00
Subject: Re: A couple of Ruby API questions

Jon McClintock wrote:

> 
> 2) Wrapping structures with flexible arrays. How do I realloc the
>    structure held by a VALUE? Or do I have to create an entirely new
>    Ruby object each time I need to resize the structure?

If you have created a VALUE by wrapping a structure with Data_Wrap_Struct or
Data_Make_Struct and you need to change the structure that the VALUE wraps,
use the DATA_PTR macro:

   VALUE my_obj;
   MyStruct my_struct;

   my_struct = malloc(sizeof(MyStruct));
   DATA_PTR(my_obj) = my_struct;

As far as Ruby is concerned the object is unchanged.
-- 
Tim Hunter