Stephen Colebourne wrote:
On 15 July 2015 at 00:51, Paul Eggert <eggert@cs.ucla.edu> wrote:
Jon Skeet wrote:
Unfortunately dump doesn't have all the information I'd wish it to - namely the split between standard and daylight offsets. It indicates whether a zone is in daylight savings or not, but not how much that contributes to the overall offset.
That shouldn't matter. No software should care about that. Any software that does care is delving into undocumented and unsupported areas.
The published API of Joda-Time and JSR-310 exposes the difference between the base offset and the current offset (including DST). Its this kind of detail that makes them much more useful. To say that software should not care and that it is unsupported is .... er .... rather worrying.
I'd also appreciate if we could get more details out of the TZ db in an easy way. We (Meinberg) also have embedded devices (not POSIX, not even an OS, just a microcontroller) which also does conversion from UTC to local time, and it would be a very nice feature if a program could easily extract all information for a given year (i.e. standard and DST offsets, beginning and end of DST, if any) from a TZ file after this has been updated.
I think I've indicated before that I'm not sure this project fully appreciates or understands the downstream impacts of changes on systems other than zic. I think Jon's proposals would help to make the impacts much clearer.
Again, I fully agree and also support Jon's proposal. Martin -- Martin Burnicki Senior Software Engineer MEINBERG Funkuhren GmbH & Co. KG Email: martin.burnicki@meinberg.de Phone: +49 (0)5281 9309-14 Fax: +49 (0)5281 9309-30 Lange Wand 9, 31812 Bad Pyrmont, Germany Amtsgericht Hannover 17HRA 100322 Geschäftsführer/Managing Directors: Günter Meinberg, Werner Meinberg, Andre Hartmann, Heiko Gerstung Web: http://www.meinberg.de