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 &lt;ordex(a)autistici.org&gt; --- 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) + /* Checks if a sequence number x is a predecessor/successor of y. * they handle overflows/underflows and can correctly check for a * predecessor/successor unless the variable sequence number has grown by -- 1.7.3.4