+
+// serv_calendar.c
+icalcomponent *icalcomponent_new_citadel_vcalendar(void);
+icalcomponent *ical_encapsulate_subcomponent(icalcomponent *subcomp);
+void ical_write_to_cal(struct ctdluser *u, icalcomponent *cal);
+void ical_send_a_reply(icalcomponent *request, char *action);
+void ical_locate_part(char *name, char *filename, char *partnum, char *disp, void *content, char *cbtype, char *cbcharset, size_t length, char *encoding, char *cbid, void *cbuserdata);
+void ical_respond(long msgnum, char *partnum, char *action);
+void ical_learn_uid_of_reply(char *uidbuf, icalcomponent *cal);
+void ical_hunt_for_event_to_update(long msgnum, void *data);
+void ical_locate_original_event(char *name, char *filename, char *partnum, char *disp, void *content, char *cbtype, char *cbcharset, size_t length, char *encoding, char *cbid, void *cbuserdata);
+void ical_merge_attendee_reply(icalcomponent *event, icalcomponent *reply);
+int ical_update_my_calendar_with_reply(icalcomponent *cal);
+void ical_handle_rsvp(long msgnum, char *partnum, char *action);
+icalproperty *ical_ctdl_get_subprop(icalcomponent *cal, icalproperty_kind which_prop);
+int ical_ctdl_is_overlap(struct icaltimetype t1start, struct icaltimetype t1end, struct icaltimetype t2start, struct icaltimetype t2end);
+int ical_conflicts_phase6(struct icaltimetype t1start, struct icaltimetype t1end, struct icaltimetype t2start, struct icaltimetype t2end, long existing_msgnum, char *conflict_event_uid, char *conflict_event_summary, char *compare_uid);
+void ical_conflicts_phase5(struct icaltimetype t1start, struct icaltimetype t1end, icalcomponent *existing_event, long existing_msgnum, char *compare_uid);
+void ical_conflicts_phase4(icalcomponent *proposed_event, icalcomponent *existing_event, long existing_msgnum);
+void ical_hunt_for_conflicts_backend(long msgnum, void *data);
+void ical_hunt_for_conflicts(icalcomponent *cal);
+void ical_conflicts(long msgnum, char *partnum);
+void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *top_level_cal);
+void ical_freebusy_backend(long msgnum, void *data);
+void ical_freebusy(char *who);
+void ical_getics_backend(long msgnum, void *data);
+void ical_getics(void);
+void ical_putics_grabtzids(icalparameter *param, void *data);
+void ical_putics(void);
+void ical_CtdlCreateRoom(void);
+void ical_send_out_invitations(icalcomponent *top_level_cal, icalcomponent *cal);
+void ical_saving_vevent(icalcomponent *top_level_cal, icalcomponent *cal);
+void ical_obj_beforesave_backend(char *name, char *filename, char *partnum, char *disp, void *content, char *cbtype, char *cbcharset, size_t length, char *encoding, char *cbid, void *cbuserdata);
+int ical_obj_beforesave(struct CtdlMessage *msg, struct recptypes *recp);
+void ical_obj_aftersave_backend(char *name, char *filename, char *partnum, char *disp, void *content, char *cbtype, char *cbcharset, size_t length, char *encoding, char *cbid, void *cbuserdata);
+int ical_obj_aftersave(struct CtdlMessage *msg, struct recptypes *recp);
+void ical_session_startup(void);
+void ical_session_shutdown(void);
+void ical_fixed_output_backend(icalcomponent *cal, int recursion_level);
+void ical_fixed_output(char *ptr, int len);
+void cmd_ical(char *argbuf);
+char *ctdl_module_init_calendar(void);