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);
int score_update(const struct osl_row *aft_row, long new_score);
-int get_num_admissible_files(unsigned *num);
int score_delete(const struct osl_row *aft_row);
int clear_score_table(void);
int row_belongs_to_score_table(const struct osl_row *aft_row, unsigned *rank);