Re: os.date("%x",2^35) crashing on Windows

[KHMan <keinhong@...>]

Stuart P. Bentley wrote:
> It starts returning nil around 2^63, but for some range between 2^34 and 
> 2^63-2^9 the Lua for Windows interpreter just crashes (at least on my 
> Windows XP laptop from 2004).
>
> --------------------------------------------------
> From: "Stuart P.Bentley"
> Sent: Wednesday, September 23, 2009 P7:42
> Newsgroups: gmane.comp.lang.lua.general
> To: <lua@bazar2.conectiva.com.br>
> Subject: os.date("%x",2^35) crashing on Windows
>
> > This might make sense as a 32-bit int overflow, but 2^34 works...

Sounds like the Thomas Edison way, 99% perspiration... :-)

loslib.c[126]:

  time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));

On MinGW, it's a long, I think. That would be 32 bits.

IIRC, the MSVCRT strftime is seriously nutty. For the format 
string, stick to the primitive ones, you should avoid the fancy 
ones like %G. You didn't specify exactly how the thingy was 
compiled, but normally, do assume that Win32 does not follow 
POSIX. I always stick to a safe or conservative subset of POSIX.

--
Cheers,
Kein-Hong Man (esq.)
Kuala Lumpur, Malaysia