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33 #ifndef NBDKIT_ROUNDING_H
34 #define NBDKIT_ROUNDING_H
38 #include "ispowerof2.h"
40 /* Round up i to next multiple of n (n must be a power of 2).
42 #define ROUND_UP(i, n) ({ \
43 assert (is_power_of_2 (n)); \
44 ((i) + (n) - 1) & -((typeof (i))(n)); \
47 /* Round down i to next multiple of n (n must be a power of 2).
49 #define ROUND_DOWN(i, n) ({ \
50 assert (is_power_of_2 (n)); \
51 (i) & -((typeof (i))(n)); \
54 /* Return n / d, rounding the result up to the next integer. */
55 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
57 #endif /* NBDKIT_ROUNDING_H */