[bug #60952] NSTimeZone fail to deal with tzfile v2+

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?60952>

                 Summary: NSTimeZone fail to deal with tzfile v2+
                 Project: GNUstep
            Submitted by: None
            Submitted on: Wed 21 Jul 2021 03:43:09 PM UTC
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

RFC 8536 defines 3 formats for tzfile. NSTimeZone only knows about version 1,
and reports bad data without error when dealing with version 2+. I tracked
down this patch because I discovered SOGo have been wrecking gmtoffset for
years.

Attached is a patch that implements enough of version 2 so that NSTimeZone can
report correct gmtoffset with a version 2+.

I had to change trans from int32_t to int64_t in the interface. I guess it
could break other code. If that is better, I can refactor the code to ignore
transitions that do not fit in in32_t.



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File Attachments:


-------------------------------------------------------
Date: Wed 21 Jul 2021 03:43:09 PM UTC  Name: tzfile2.patch  Size: 4KiB   By:
None

<http://savannah.gnu.org/bugs/download.php?file_id=51678>

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