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icaltimezone* icaltimezone_get_builtin_timezone_from_offset ( int  offset,
const char *  tzname 

Returns a single builtin timezone, given its offset from UTC

Definition at line 1447 of file icaltimezone.c.

References builtin_timezones, icaltimezone_init_builtin_timezones(), icaltimezone_load_builtin_timezone(), and utc_timezone.

    icaltimezone *zone=NULL;
    int count, i;
    if (!builtin_timezones)
      icaltimezone_init_builtin_timezones ();

    if (offset==0)
      return &utc_timezone;

    if (!tzname)
      return NULL;

    count = builtin_timezones->num_elements;

    for (i=0; i<count; i++) {
      int z_offset;
      zone = icalarray_element_at (builtin_timezones, i);
      if (!zone->component)
          icaltimezone_load_builtin_timezone (zone);
      z_offset = get_offset(zone);

      if (z_offset == offset && zone->tznames && !strcmp(tzname, zone->tznames))
          return zone;
    return NULL;

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