icalrecur: Ignore time-related BY* if DTSTART is date-only.

Author: minichma

src/libical/icalrecur.c

@@ -756,26 +756,27 @@ static struct recur_map
     const char *str;
     size_t offset;
     int limit;
+    int isTime;
 } recur_map[] = {
     { ";BYSECOND=", offsetof(struct icalrecurrencetype, by_second),
-      ICAL_BY_SECOND_SIZE - 1 },
+      ICAL_BY_SECOND_SIZE - 1, 1 },
     { ";BYMINUTE=", offsetof(struct icalrecurrencetype, by_minute),
-      ICAL_BY_MINUTE_SIZE - 1 },
+      ICAL_BY_MINUTE_SIZE - 1, 1 },
     { ";BYHOUR=", offsetof(struct icalrecurrencetype, by_hour),
-      ICAL_BY_HOUR_SIZE - 1 },
+      ICAL_BY_HOUR_SIZE - 1, 1 },
     { ";BYDAY=", offsetof(struct icalrecurrencetype, by_day),
-      ICAL_BY_DAY_SIZE - 1 },
+      ICAL_BY_DAY_SIZE - 1, 0 },
     { ";BYMONTHDAY=", offsetof(struct icalrecurrencetype, by_month_day),
-      ICAL_BY_MONTHDAY_SIZE - 1 },
+      ICAL_BY_MONTHDAY_SIZE - 1, 0 },
     { ";BYYEARDAY=", offsetof(struct icalrecurrencetype, by_year_day),
-      ICAL_BY_YEARDAY_SIZE - 1 },
+      ICAL_BY_YEARDAY_SIZE - 1, 0 },
     { ";BYWEEKNO=", offsetof(struct icalrecurrencetype, by_week_no),
-      ICAL_BY_WEEKNO_SIZE - 1 },
+      ICAL_BY_WEEKNO_SIZE - 1, 0 },
     { ";BYMONTH=", offsetof(struct icalrecurrencetype, by_month),
-      ICAL_BY_MONTH_SIZE - 1 },
+      ICAL_BY_MONTH_SIZE - 1, 0 },
     { ";BYSETPOS=", offsetof(struct icalrecurrencetype, by_set_pos),
-      ICAL_BY_SETPOS_SIZE - 1 },
-    { 0, 0, 0 }
+      ICAL_BY_SETPOS_SIZE - 1, 0 },
+    { 0, 0, 0, 0 }
 };
 
 char *icalrecurrencetype_as_string(struct icalrecurrencetype *recur)
@@ -1041,7 +1042,15 @@ static void setup_defaults(icalrecur_iterator *impl,
 {
     icalrecurrencetype_frequency freq = impl->rule.freq;
 
-    if (expand_map[freq].map[byrule] == EXPAND) {
+    if (impl->dtstart.is_date && recur_map[byrule].isTime) {
+        // The BYSECOND, BYMINUTE and BYHOUR rule parts MUST NOT be specified
+        // when the associated "DTSTART" property has a DATE value type.
+        // These rule parts MUST be ignored in RECUR value that violate the
+        // above requirement (e.g., generated by applications that pre-date
+        // this revision of iCalendar).
+        impl->by_ptrs[byrule][0] = 0;
+        impl->by_ptrs[byrule][1] = ICAL_RECURRENCE_ARRAY_MAX;
+    } else if (expand_map[freq].map[byrule] == EXPAND) {
 
         /* Re-write the BY rule arrays with data from the DTSTART time so
            we don't have to explicitly deal with DTSTART */