Re: [B.A.T.M.A.N.] [PATCH] batman-adv: add biggest_unsigned_int(x) macro

[Marek Lindner <lindner_marek@yahoo.de>]

On Wednesday, November 23, 2011 18:35:44 Antonio Quartulli wrote:
> in case of dynamic type variable, it could be needed to compute at compile
> time its maximal value. This macro helps in doing that for unsigned
> integer types
> 
> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
> ---
>  main.h |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/main.h b/main.h
> index 464439f..3c58235 100644
> --- a/main.h
> +++ b/main.h
> @@ -210,6 +210,9 @@ static inline int compare_eth(const void *data1, const
> void *data2) /* Returns the smallest signed integer in two's complement
> with the sizeof x */ #define smallest_signed_int(x) (1u << (7u + 8u *
> (sizeof(x) - 1u))) 
> +/* Returns the biggest unsigned integer with the sizeof x */
> +#define biggest_unsigned_int(x) (~(x)0)
> +

The final conclusion of the IRC discussion might have escaped me but wasn't 
there supposed to be a cast somewhere ?

Regards,
Marek