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Re: NSDateFormatter issue


From: Lobron, David
Subject: Re: NSDateFormatter issue
Date: Thu, 16 Mar 2017 15:53:15 +0000

Thanks, Stefan.

I just followed Riccardo's earlier suggestion and repeated my test with the 
latest 1.24.9 code, and the test now passes:

dateStr = Jan 2, 2001, 9:00:00 AM, refStr = Jan 2, 2001, 9:00:00 AM

Apologies for bothering you guys with this!  

--David

> On Mar 16, 2017, at 11:01 AM, Stefan Bidigaray <address@hidden> wrote:
> 
> Hi David,
> 
> Just as a note, the GNUstep code relies heavily on the ICU library.
> 
> What version of ICU are you using? Would it be possible to test against a 
> different version of that library? I'm not trying to pass the bucket, but we 
> just use the output of ICU as-is for these functions.
> 
> On Wed, Mar 15, 2017 at 4:10 PM, Lobron, David <address@hidden> wrote:
> Hi Niels (also also Stefan, who replied offline),
> 
> I tried changing the order of the setters, but that did not appear to make a 
> difference.  I also tried calling the setter methods instead of setting the 
> ivars:
> 
> [dateFormatter setTimeStyle:NSDateFormatterMediumStyle];
> 
> rather than
> 
> dateFormatter.timeStyle = NSDateFormatterMediumStyle;
> 
> However, I'm still getting the incorrect format.  The code in NSDateFormatter 
> seems fine to me, too (this is the 1.24.8 codeline).  But I still get:
> 
> dateStr = 20010102 09:00 AM, refStr = Jan 2, 2001, 9:00:00 AM
> 
> I will keep digging into it.
> 
> Thank you for the help so far,
> 
> David
> 
> > On Mar 13, 2017, at 2:26 PM, Niels Grewe <address@hidden> wrote:
> >
> > Hi David,
> >
> > just a small pointer wrt this: I vaguely recall having seen a similar 
> > phenomenon in the past, where it turned out that our NSDateFormatter 
> > implementation was sensitive to the order in which you called the setters. 
> > I was under the impression that that problem had been fixed -- but maybe 
> > there's a bug still hiding in there...
> >
> > Cheers,
> >
> > Niels
> >
> > Von: address@hidden
> > Gesendet: 13. März 2017 4:33 nachm.
> > An: address@hidden
> > Betreff: NSDateFormatter issue
> >
> > Hi All,
> >
> > I've been working to get the NSDateFormatter class working with my 
> > company's GNUStep version, which is based on GNUStep-1.24.8 for GNU/Linux.  
> > I updated my build flags to signal that libicu should be used, and I 
> > verified with print statements that NSDateFormatter's GS_USE_ICU variable 
> > is set to true.
> >
> > However, when I try to format an NSDate object, I'm finding that although 
> > the date is correct, the format never changes.  My test code looks like 
> > this:
> >
> >     NSDateFormatter *dateFormatter = [[NSDateFormatter new] autorelease];
> >     dateFormatter.dateStyle = NSDateFormatterMediumStyle;
> >     dateFormatter.timeStyle = NSDateFormatterMediumStyle;
> >     [dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:@"GMT"]];
> >     NSDate *date = [NSDate dateWithTimeIntervalSinceReferenceDate:118800];
> >     dateFormatter.locale = [[NSLocale alloc] 
> > initWithLocaleIdentifier:@"en_US"];
> >     NSString *dateStr = [dateFormatter stringFromDate:date];
> >     NSString *refStr = @"Jan 2, 2001, 9:00:00 AM";
> >     NSLog(@"dateStr = %@, refStr = %@", dateStr, refStr);
> >
> > But it prints the following:
> >
> > dateStr = 20010102 09:00 AM, refStr = Jan 2, 2001, 9:00:00 AM
> >
> > On a Mac, by contrast, dateStr has the correct format:
> >
> > 2017-03-13 11:30:03.081 testNsDateFormatter[6357:607704] dateStr = Jan 2, 
> > 2001, 9:00:00 AM, refStr = Jan 2, 2001, 9:00:00 AM
> >
> > Does anyone know what might be causing this?  If not, I will dig deeper 
> > into NSDateFormatter and also check libicu.  I tend to think libicu is not 
> > the problem, because it runs a lot of internal tests on the udat_format 
> > function, which is what NSDateFormatter is calling, and I've confirmed that 
> > the format tests pass when run within libicu.
> >
> > Thanks,
> >
> > David
> >
> >
> >
> > _______________________________________________
> > Discuss-gnustep mailing list
> > address@hidden
> > https://lists.gnu.org/mailman/listinfo/discuss-gnustep
> 
> 
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