[Bug libc/12747] New: RFE: New time zone conversion specifier character

[Bug libc/12747] New: RFE: New time zone conversion specifier character

[myllynen at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12747

           Summary: RFE: New time zone conversion specifier character
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper.fsp@gmail.com
        ReportedBy: myllynen@redhat.com


Some countries [1] have recommendations that time zone should be presented for
example as UTC+2 or UTC-3. This is also the format lots of web sites are using
today (although some of them use GMT instead of UTC).

Would it be possible to add a conversion specifier character which would emit
just the offset in hours without leading/trailing zeroes when possible? In case
of half hours a flag to indicate the hour separator would be used.

For example, if the conversion specifier character would be %f then one would
get with "%f"

-7

in a time zone being UTC-7 and with "%.f" one would get

+5.30

in a time zone UTC+5:30. This would be easier to read than what is available
now with %z. In some applications the space for time zone is very limited so
this compact format would also help there (think of UTC+0200 vs UTC+2).

1) Finland is one example of such a recommendation, for reference see

http://kotoistus.fi/suositukset/vahv_kalenterit_cldr1_4.htm#Kellonajat

Thanks.

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[Bug libc/12747] RFE: New time zone conversion specifier character

[drepper.fsp at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12747

Ulrich Drepper <drepper.fsp at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING

--- Comment #1 from Ulrich Drepper <drepper.fsp at gmail dot com> 2011-05-10 20:43:23 UTC ---
strftime specifiers are an extremely scarse resource.  Any addition can
conflict with future extensions in the standard and standard bodies often don't
pay attention to existing implementations.

You'll have to get an extension accepted by either or both of the ISO C and
POSIX bodies.

BTW: instead of wasting yet another character it might be better to use
modifiers to existing specifiers.  Look at GNU date for inspiration.

Report back when you get results from the standard bodies.

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[Bug libc/12747] RFE: New time zone conversion specifier character

[myllynen at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12747

Marko Myllynen <myllynen at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
         AssignedTo|drepper.fsp at gmail dot    |unassigned at sourceware
                   |com                         |dot org

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[Bug libc/12747] RFE: New time zone conversion specifier character

[bugdal at aerifal dot cx]

http://sourceware.org/bugzilla/show_bug.cgi?id=12747

Rich Felker <bugdal at aerifal dot cx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bugdal at aerifal dot cx

--- Comment #2 from Rich Felker <bugdal at aerifal dot cx> 2012-05-19 01:08:12 UTC ---
I tend to agree with Drepper's analysis on this one. glibc has made plenty of
mistakes in the past in this area (for example, the scanf %a fiasco) and I'd
like to see it not repeated...

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[Bug libc/12747] RFE: New time zone conversion specifier character

[myllynen at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12747

Marko Myllynen <myllynen at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|unspecified                 |2.18

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[Bug libc/12747] RFE: New time zone conversion specifier character

[neleai at seznam dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=12747

Ondrej Bilka <neleai at seznam dot cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |neleai at seznam dot cz
         Resolution|---                         |WONTFIX

--- Comment #3 from Ondrej Bilka <neleai at seznam dot cz> ---
closing as there was no reply about using modifier/asking standard body etc.

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[Bug libc/12747] RFE: New time zone conversion specifier character

[myllynen at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=12747

Marko Myllynen <myllynen at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|WONTFIX                     |---
     Ever confirmed|1                           |0

--- Comment #4 from Marko Myllynen <myllynen at redhat dot com> ---
(In reply to Ondrej Bilka from comment #3)
> closing as there was no reply about using modifier/asking standard body etc.

Actually I've just few weeks ago initiated discussion about this elsewhere:

http://lists.gnu.org/archive/html/coreutils/2013-09/msg00020.html

I'll let you know how it goes but it'll take some time.

Thanks.

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[Bug libc/12747] RFE: New time zone conversion specifier character

[myllynen at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=12747

Marko Myllynen <myllynen at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-10-09
     Ever confirmed|0                           |1

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[Bug libc/12747] RFE: New time zone conversion specifier character

[myllynen at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=12747

--- Comment #5 from Marko Myllynen <myllynen at redhat dot com> ---
I've now filed http://austingroupbugs.net/view.php?id=772, I'll report here
when something happens on that front.

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[Bug libc/12747] RFE: New time zone conversion specifier character

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=12747

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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[Bug time/12747] RFE: New time zone conversion specifier character

[jsm28 at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=12747

Joseph Myers <jsm28 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|libc                        |time

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