On Jan 2, 2008 8:16 AM, Reuben Thomas <rrt@sc3d.org> wrote:
It would make it easier to write portable code for Lua if there
were maxima
and minima for the number types, say LUA_NUMBER_MAX,
LUA_NUMBER_MIN &c. For
a default configured system, one can of course use the limits for the
default types, ptrdiff_t and double respectively, but that's not
portable to
systems using non-default types.
--
http://rrt.sc3d.org/
memoir, n. a lie that flatters the author's ego and the reader's
intellect
The maximum value, as in highest possible exponent, or highest
possible integer mantissa? The two are noticably different. With 64
bit double-precision, the maximum number is 1.7976931348623157 x
10^308, however the 53 bit mantissa loses resolution about
9007199254740991.
A nice way to verify that second number would be this:
function maxluanumber()
local x = 1
while x < x +1 do
x = x * 2
end
return x
end
