Re: 64 bit integers

[Asko Kauppi <askok@...>]

http://luaforge.net/frs/?group_id=214&release_id=1341

- apply the patch
- compile with -DLNUM_INT64

You will get a mixed mode double / int64 Lua.

If you only need to store 64-bit values from the C side, have you  
considered using light userdata (storing them as pointers). More often  
than not, that is enough.

-asko


Martin, Marcus kirjoitti 1.6.2009 kello 20:17:

> Ah, yes, you are correct. Unfortunately I need the full 64 bit  
> integer size in Lua. How do I get that?
>
> -----Original Message-----
> From: lua-bounces@bazar2.conectiva.com.br [mailto:lua-bounces@bazar2.conectiva.com.br 
> ] On Behalf Of Javier Guerra
> Sent: Monday, June 01, 2009 1:07 PM
> To: Lua list
> Subject: Re: 64 bit integers
>
> On Mon, Jun 1, 2009 at 11:59 AM, Martin, Marcus <mamartin@ea.com>  
> wrote:
> > How do I use 64 bit integers in Lua? By default on my system (VS  
> > 2005,
> > WinXP) I get 32 bit integers. Do I need to recompile the entire  
> > library with
> > 64 bit support? That would make all integers 64 bit right? Is there  
> > a mixed
> > mode?
>
> by default you don't get integers, the 'Number' type is a double (64
> bit, IIRC).  it has enough precision to express 52 bit integers
>
> --
> Javier