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Invalid VTIMEZONE definitions for negative offsets to UTC
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Description

As reported through the devel mailing list, libvacalendaring generates invalid timezone specifications specifically with TZOFFSETFROM and TZOFFSETTO for timezones with negative UTC offsets:

BEGIN:VTIMEZONE
TZID:America/New_York
X-MICROSOFT-CDO-TZID:10
BEGIN:STANDARD
DTSTART:20141102T060000
TZOFFSETFROM:-400
TZOFFSETTO:-500
TZNAME:EST
END:STANDARD
...
END:VTIMEZONE

The offset values should read -0400 and -0500 instead.
The reporter suggests this

patch.txt1 KBDownload
for fixing the issue.

Test cases to be created:

$tz = new DateTimezone('America/New_York');
$event = array(
  'uid' => '12345',
  'summary' => 'test',
  'start' => new DateTime('20130703T143000', $tz),
  'end' => new DateTime('20130703T143000', $tz),
);

$ical = new libvcalendar();
$ics = $ical->export(array($event));

Expected result:

$ics contains TZOFFSETFROM:-0400 and TZOFFSETTO:-0500

Details

Ticket Type
Task

Revisions and Commits

rRPK roundcubemail-plugins-kolab
rRPKc01f8017e349 Fix invalid VTIMEZONE definitions for offsets negative to UTC

Event Timeline

bruederli created this task.Jun 4 2015, 2:43 PM
bruederli claimed this task.
bruederli raised the priority of this task from to 60.
bruederli updated the task description. (Show Details)
bruederli added projects: Roundcube Kolab Plugins , Restricted Project.
bruederli changed Ticket Type from Task to Task.
bruederli edited projects, added: Restricted Project; removed: Restricted Project.
bruederli edited a custom field.
bruederli updated the task description. (Show Details)
bruederli subscribed.
bruederli added a comment.Jun 4 2015, 2:55 PM

Interesting:

printf("* %02d\n",  2);
printf("* %02d\n", -2);

results in

* 02
* -2

The sign character also contributes to the number of digits. This:

printf("* %+03d\n",  2);
printf("* %+03d\n", -2);

produces the expected result for the timezone specifications:

* +02
* -02
bruederli closed this task as Resolved by committing rRPKc01f8017e349: Fix invalid VTIMEZONE definitions for offsets negative to UTC.Jun 8 2015, 7:50 AM
bruederli added a commit: rRPKc01f8017e349: Fix invalid VTIMEZONE definitions for offsets negative to UTC.
bruederli moved this task from Restricted Project Column to Restricted Project Column on the Restricted Project board.Jun 8 2015, 7:52 AM