From: phlip <phlip2005@...>
Date: 2008-07-06T13:46:38+09:00
Subject: Re: Ruby C API Question

Seebs wrote:

> Now, you may think that the semantic differences don't come up very often,
> and in some code this may be correct.  However, there really is a difference;
> it is not "just a style thing".

Given a K&R-compatible C implementation, this is indeed not just a style thing:

fsdbm_s_open(argc, argv, klass)
     int argc;
     VALUE *argv;
     VALUE klass;

I suspect it might push the 3 arguments as machine words, even if one were 
narrow, like a char. Gods only know what it could do with the pointer - and a 
VALUE is a union of pointers with scalars.

But I forget how much prototyping is required to get a C to pass chars as chars. 
Probably enough to invoke the "as if" rule. But because I know I _don't_ know 
this, I would not play games with method calls into Ruby's raw C source!

-- 
   Phlip