[PATCH] strftime: support %q to output the quarter of year

[Pádraig Brady]

On 04/11/16 12:07, Szabolcs Nagy wrote:
> On 04/11/16 12:00, Pádraig Brady wrote:
>> On 04/11/16 11:41, Szabolcs Nagy wrote:
>>> On 03/11/16 19:46, Pádraig Brady wrote:
>>>> This is already supported by gnulib.
>>
>>> why?
>>
>> It's a marginal benefit, but as
>> noted in the cover of my updated patch:
>>
>> "Note even though the code is trivial here,
>> %q is useful from the shell as there you need to:
>> $(( ($(date +%-m)-1)/3+1 ))".
>>
>> I'll add that to the actual commit.
> 
> this can conflict with future standard, so
> there need to be a strong reason for adding
> such extensions to portability libraries
> such as gnulib or to c runtimes.
> 
> how does gnulib plan to deal with the conflict
> once posix adds %q with different meaning?

Perl's date lib also uses %q for quarter.
So between that and gnulib (and glibc?)
POSIX would be unlikely to choose %q for something else.
In any case I intend to propose it to the POSIX folks.

thanks,
Pádraig