1.9 Ruby C Extension?

ruby-talk
1

Hi All,

   When writing ruby extensions in C, how can I save C pointers into ruby
variables Bignum or Fixnum?
The only Macros available are INT2FIX, INT2NUM & FIX2INT and NUM2INT. I can
not save a pinter value that is 32 bits long.

example:

static VALUE round_trip(VALUE self, VALUE vptr)
{
    void* ptr = NUM2INT(vptr);
    return INT2NUM(ptr);
}

2

Alex Katebi wrote:

Hi All,

   When writing ruby extensions in C, how can I save C pointers into
ruby
variables Bignum or Fixnum?
The only Macros available are INT2FIX, INT2NUM & FIX2INT and NUM2INT. I
can
not save a pinter value that is 32 bits long.

example:

static VALUE round_trip(VALUE self, VALUE vptr)
{
    void* ptr = NUM2INT(vptr);
    return INT2NUM(ptr);
}

I don't think I'd do that. My inclination would be to create a structure
to hold the pointer and wrap the structure into a Ruby object.

···

--
Posted via http://www.ruby-forum.com/\.

3

Um, yeah, that, that's just wrong. What exactly are you trying to
accomplish with this extension?

In case you haven't read it, please go read:
http://whytheluckystiff.net/ruby/pickaxe/, the chapter called
Extending Ruby

Jason

···

On Thu, Aug 7, 2008 at 1:44 PM, Alex Katebi <alex.katebi@gmail.com> wrote:

Hi All,

  When writing ruby extensions in C, how can I save C pointers into ruby
variables Bignum or Fixnum?
The only Macros available are INT2FIX, INT2NUM & FIX2INT and NUM2INT. I can
not save a pinter value that is 32 bits long.

example:

static VALUE round_trip(VALUE self, VALUE vptr)
{
   void* ptr = NUM2INT(vptr);
   return INT2NUM(ptr);
}