+time_t ddts_get_last_date(struct daily_download_total **);
+
+struct daily_download_total **
+ddts_merge(struct daily_download_total **,
+ struct daily_download_total **);
+
+int ddts_get_count(struct daily_download_total **);
+
+struct daily_download_total *ddt_clone(struct daily_download_total *);
+struct daily_download_total **ddts_clone(struct daily_download_total **);
+