From bd238bfd7c443fd974f5b7edd6c1abc0349bfa78 Mon Sep 17 00:00:00 2001 From: Lars Henriksen Date: Thu, 7 May 2020 21:39:23 +0200 Subject: Fix recurrence rule expansion with ordered weekday When the order of a weekday in BYDAY rule expansion (like -5SA or 5SU for monthly or 55WE for yearly) exceeds the number of available weekdays in the period (month or year), rule expansion with negative order could result in a floating point exception. The reason: the modified frequency might become zero. Solution. Check order against number of available weekdays and terminate expansion early whenever possible (also for positive orders). Signed-off-by: Lars Henriksen Signed-off-by: Lukas Fleischer --- test/data/rfc5545 | 1 + 1 file changed, 1 insertion(+) (limited to 'test/data') diff --git a/test/data/rfc5545 b/test/data/rfc5545 index 421dd53..d9863ce 100644 --- a/test/data/rfc5545 +++ b/test/data/rfc5545 @@ -25,3 +25,4 @@ 12/25/1997 [1] {3Y w-11} Last Thursday of the year every third year, forever (FREQ=YEARLY;INTERVAL=3;BYDAY=-1TH) 06/22/1997 [1] {2Y w0 w1} Every Sunday and Monday, every other year (FREQ=YEARLY;INTERVAL=2;BYDAY=SU,MO) 02/01/1997 [1] {1Y -> 01/31/2005 d1 d29 m2} Every year on February 1 and 29 for eight years (RRULE:FREQ=YEARLY;UNTIL=20050131T000000Z;BYMONTH=2;BYMONTHDAY=1,29) +08/01/2020 @ 08:41 -> 08/01/2020 @ 10:11 {1M w-41} |negative ordered weekday may not exist -- cgit v1.2.3-70-g09d2