Re: lua_Integer in Lua 5.3

[Philipp Janda <siffiejoe@...>]

Am 04.12.2013 21:27 schröbte Alexander Nasonov:
> Philipp Janda wrote:
> > Makes sense. "long long" has a much higher chance of being 64 bits on 32
> > bit machines, and having 64 bit integers becomes important in Lua 5.3.
>
> The text below is from pre-C11 standard but I'm pretty sure it's no
> different from C99 (too lazy to unpack a box with my hardcopy of C99,
> I recently moved house).
>
> http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1539.pdf
>
> 5.2.4.2.1 Sizes of integer types <limits.h>
>
> -- minimum value for an object of type long long int
> LLONG_MIN -9223372036854775807 // - (2^63 - 1)
>
> -- maximum value for an object of type long long int
> LLONG_MAX +9223372036854775807 // 2^63 - 1
>
> -- maximum value for an object of type unsigned long long int
> ULLONG_MAX 18446744073709551615 // 2^64 - 1

Thanks for confirming. It's the same for C99 btw., so the probability of 
"long long" being at least 64 bit is 100% on C99-compilers (and up), and 
still pretty good when we add C90 compilers to the mix.

Philipp