On 2022-10-18 08:03, Corinna Vinschen wrote:
> On Sep 19 11:51, C Howland wrote:
>> On Saturday, September 17, 2022 1:00 AM, Brian Inglis wrote:
>>> newlib/libc/time/strftime.c(__strftime):
>>> %i year in century [00..99] Synonym for "%y". Non-POSIX extension.
>>> [tm_year]
>>> %q GNU quarter of the year (from `<<1>>' to `<<4>>') [tm_mon]
>>> %v OSX/Ruby VMS/Oracle date "%d-%b-%Y". Non-POSIX extension. [tm_mday,
>>> tm_mon, tm_year]
>>> add %i %q %v tests
>>> %Z clarify current time zone *abbreviation* not "name" [tm_isdst]
>>> ---
>>>   newlib/libc/time/strftime.c | 67 +++++++++++++++++++++++++++++++++++--
>>>   1 file changed, 64 insertions(+), 3 deletions(-)

> - %i: Where is used and documented?  I don't see this in glibc, not even
>    in the latest from the glibc git repo.

Some portable language implementations for non-Unix platforms that I came across 
and documented but did not keep track of, and now can't find!

> - %q: Ditto. For a GNU extension, it's surprisingly absent from the
>    most recent glibc code, or do I miss something?

Looks like this may have been lost in the discussion:

https://inbox.sourceware.org/libc-alpha/2f5f737e-2e42-08c6-ae2b-33aab798a1d9@draigBrady.com/

but as he says, it was already in gnulib, and made it into date the same month:

https://git.savannah.gnu.org/cgit/coreutils.git/diff/?id=30012b290facf66551cdf395ace397903d00483d

also in Perl and ksh93 printf %(...)T.

> - %v: OSX/Ruby?  Isn't that already gone?  Also, it introduces another
>    ambiguous date format where %F or equivalent should be used instead.

All the BSDs, Darwin, Oracle, and Ruby support it: it is localized, but not 
ambiguous, as it's dd-Mon-yyyy.

> It's nice to add features, but it wouldn't hurt to have some
> clarification and justification if it's non-standard stuff.
> Availability in glibc or in the BSDs is typically justification enough,
> but I don't see this here.

See attached sh and log for doc and code searches.

-- 
Take care. Thanks, Brian Inglis			Calgary, Alberta, Canada

La perfection est atteinte			Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter	not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer	but when there is no more to cut
			-- Antoine de Saint-Exupéry