diff options
| -rw-r--r-- | src/common/mt_rand.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/common/mt_rand.h b/src/common/mt_rand.h index 95f30e5..84d32e5 100644 --- a/src/common/mt_rand.h +++ b/src/common/mt_rand.h @@ -15,7 +15,10 @@ uint32_t mt_random (void); * MRAND(10) returns 0..9 * MPRAND(5,10) returns 5..14 */ -# define MRAND(mod) (mt_random() % (mod)) +// The cast is essential because the result is sometimes +// compared with a possibly negative number. +// Because it's using modulus, high numbers shouldn't happen anyway. +# define MRAND(mod) ((int)(mt_random() % (mod))) # define MPRAND(add, mod) ((add) + MRAND(mod)) #endif // MT_RAND_H |