GNU bug report logs - #7325
new test failure due to non-portability of printf formats like %05.3s

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Message #41 received at 7325 <at> debbugs.gnu.org (full text, mbox):

From: Jim Meyering <jim <at> meyering.net>
To: Pádraig Brady <P <at> draigBrady.com>
Cc: Eric Blake <eblake <at> redhat.com>, Paul Eggert <eggert <at> cs.ucla.edu>,
	7325 <at> debbugs.gnu.org
Subject: Re: bug#7325: new test failure due to non-portability of printf
	formats like %05.3s
Date: Fri, 05 Nov 2010 07:34:25 +0100

Pádraig Brady wrote:
...
>> That's simply an issue of whether the value is considered to be signed
>> or unsigned, and can be fixed by the patch at the end of this message.
>>
>> However, let me take a step back a minute.  Do users really want all
>> this functionality?  Personally, what I'd like to see is a single
>> format like this:
>>
>>    %.3X
>>
>> that prints out the entire seconds since the Epoch, truncated
>> to millseconds.  That's simpler than what we require now:
>>
>>    %X.%.3:X
>>
>> The changelogs suggest that we used to do things the simpler way,
>> but changed on Oct. 21.  I don't recall this being discussed: I
>> assume it was due to floating point rounding issues.  Still, I'd
>> prefer the simpler notation, and we should be able to implement it
>> without floating point.  Would that be OK?  The idea would be
>> to support ".PRECISION" in the formats for W, X, Y, and Z, and
>> to drop support for ':W' and the like.
>
> I think you're echoing my suggestion here:
> http://comments.gmane.org/gmane.comp.gnu.coreutils.general/369

Oh!  Indeed.
Sorry I didn't see that part of the thread.

> Given the counter arguments there it was decided to
> split to X and :X etc.
>
> I still slightly prefer just using %.X as
> it's backwards compat with older coreutils (excluding 8.6).

So do I.

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