/* score */
void score_init(struct afs_table *t);
int admissible_file_loop(void *data, osl_rbtree_loop_func *func);
-int admissible_file_loop_reverse(void *data, osl_rbtree_loop_func *func);
int score_get_best(struct osl_row **aft_row, long *score);
int get_score_and_aft_row(struct osl_row *score_row, long *score, struct osl_row **aft_row);
int score_add(const struct osl_row *row, long score);