Re: How to change io::f_seek to use 64 bit numbers

On Wed, 01 Oct 2008 12:00:33 +0300, Shmuel Zeigerman <shmuz <at> 013net.net>  
wrote:

> Todor Totev wrote:
>> I'd like to use (platform specific) fseek with 64-bit file offsets  
>> inside io lib f_seek function.
>> But it gets the lua number with luaL_optlong which truncates it to long.
>> What do you suggest me to fix it?
>
> Either patch Lua with your platform-specific fseek, or write a library.
>
> Use luaL_optnumber rather than luaL_optlong, cast it to whatever is a  
> 64-bit integer type on your platform, then you'll be able to get/set  
> offsets up to 2^53 bytes (assuming lua_Number is double).
>

luaL_optnumber is what I need, thank you very much.