sn_comparator_t *sn_comparator_create (int min, int max);
void sn_comparator_destroy (sn_comparator_t *c);
void sn_comparator_invert (sn_comparator_t *c);
sn_comparator_t *sn_comparator_create (int min, int max);
void sn_comparator_destroy (sn_comparator_t *c);
void sn_comparator_invert (sn_comparator_t *c);