NS_IMETHODIMP
calDateTime::GetTimezoneOffset(int32_t *aResult)
{
NS_ENSURE_ARG_POINTER(aResult);
icaltimetype icalt;
ToIcalTime(&icalt);
int dst;
*aResult = icaltimezone_get_utc_offset(const_cast<icaltimezone *>(icalt.zone), &icalt, &dst);
return NS_OK;
}
//TODO: should not call libical functions directly -- better to make
// a new libkcal abstraction method.
QDateTime WebdavHandler::zoneAsUtc( const QDateTime& zone, const QString& timeZoneId )
{
int daylight;
QDateTime epoch;
epoch.setTime_t( 0 );
time_t v = epoch.secsTo( zone );
struct icaltimetype tt = icaltime_from_timet( v, 0 ); // 0: is_date=false
int offset = icaltimezone_get_utc_offset(
icaltimezone_get_builtin_timezone( timeZoneId.latin1() ),
&tt, &daylight );
return zone.addSecs( - offset );
}
//TODO: should not call libical functions directly -- better to make
// a new libkcal abstraction method.
QDateTime utcAsZone( const QDateTime& utc, const QString& timeZoneId )
{
int daylight;
QDateTime epoch;
epoch.setTime_t( 0 );
time_t v = epoch.secsTo( utc );
struct icaltimetype tt = icaltime_from_timet( v, 0 ); // 0: is_date=false
int offset = icaltimezone_get_utc_offset(
icaltimezone_get_builtin_timezone( timeZoneId.latin1() ),
&tt, &daylight );
return utc.addSecs( offset );
}
//TODO: should not call libical functions directly -- better to make
// a new libkcal abstraction method.
QDateTime WebdavHandler::utcAsZone( const QDateTime& utc, const QString& timeZoneId )
{
int daylight;
QDateTime epoch;
epoch.setTime_t( 0 );
time_t v = epoch.secsTo( utc );
struct icaltimetype tt =
icaltime_from_timet_with_zone( v, 0 /*is_date*/,
icaltimezone_get_builtin_timezone( "UTC" ) );
int offset = icaltimezone_get_utc_offset(
icaltimezone_get_builtin_timezone( timeZoneId.latin1() ),
&tt, &daylight );
kdDebug() << "Calculated offset of: " << offset << " of timezone: " << timeZoneId << endl;
return utc.addSecs( offset );
}
int main(int argc, char *argv[]) {
char *dtstr = "20031026T190000";
icaltimezone *zone;
struct icaltimetype tt;
int utc_offset;
if (argc > 1) {
dtstr = argv[1];
}
icalcomponent *zonecomp = icalcomponent_new_from_string(mytz);
zone = icaltimezone_new();
icaltimezone_set_component(zone, zonecomp);
tt = icaltime_from_string(dtstr);
icaltime_set_timezone(&tt, zone);
utc_offset = icaltimezone_get_utc_offset(zone, &tt, NULL);
printf("OFFSET for %s is %d %p\n", dtstr, utc_offset, zone);
}
void
icaltimezone_convert_time (struct icaltimetype *tt,
icaltimezone *from_zone,
icaltimezone *to_zone)
{
int utc_offset, is_daylight;
/* If the time is a DATE value or both timezones are the same, or we are
converting a floating time, we don't need to do anything. */
if (icaltime_is_date(*tt) || from_zone == to_zone || from_zone == NULL)
return;
/* Convert the time to UTC by getting the UTC offset and subtracting it. */
utc_offset = icaltimezone_get_utc_offset (from_zone, tt, NULL);
icaltime_adjust (tt, 0, 0, 0, -utc_offset);
/* Now we convert the time to the new timezone by getting the UTC offset
of our UTC time and adding it. */
utc_offset = icaltimezone_get_utc_offset_of_utc_time (to_zone, tt,
&is_daylight);
tt->is_daylight = is_daylight;
icaltime_adjust (tt, 0, 0, 0, utc_offset);
}
