From: Martin DeMello <martindemello@...>
Date: 2009-06-16T03:11:25+09:00
Subject: Re: wrapping a C struct[] constant

On Mon, Jun 15, 2009 at 7:13 PM, Jason Roelofs<jameskilton@gmail.com> wrote:
>
> Could you give an example of how this would work? I'm having a hard time
> picturing how such a thing would be possible to have done automagically.
> There has to be something somewhere that defines how a Ruby class would map
> to said C struct.

Yes, I was simply looking for something like

struct foo {
  int bar;
  char *baz;
}

cFoo = rb_define_class('cFoo')
rb_map_struct(cFoo, foo)
rb_accessor(cFoo, 'int', 'bar', bar)
rb_accessor(cFoo, 'str', 'bar', bar)

VALUE rb_function() {
  foo* a = some_function_call()
  return rb_deserialize_data(foo)
}

and from ruby

foo = rb_function
foo.bar
foo.baz

martin