Re: math.maxint (Re: [ANN] Lua 5.3.0 (work1) now available)

[Lorenzo Donati <lorenzodonatibz@...>]

On 10/07/2013 9.09, Dirk Laurie wrote:
> 2013/7/6 Luiz Henrique de Figueiredo <lhf@tecgraf.puc-rio.br>:
> > Lua 5.3.0 (work1) is now available for testing at
> >          http://www.lua.org/work/lua-5.3.0-work1.tar.gz
>
> The values of MAX_INTEGER and MIN_INTEGER from llimits.h need to
> be accessible to Lua programs, maybe math.maxint, math.minint.
in another message Roberto stated that the width of both ints and floats
is available as:

debug.numbits'i'
debug.numbits'f'

Since 2's complement is assumed, you can compute them indirectly as

IBITS = debug.numbits'i'
MAX_INT = 2^(IBITS-1)-1
MIN_INT = -2^(IBITS-1)

Cheers,

-- Lorenzo

--
()  ascii ribbon campaign - against html e-mail
/\  www.asciiribbon.org   - against proprietary attachments