Re: NSCalendarDate problem

[Richard Frith-Macdonald]

On Thursday, July 3, 2003, at 08:24  pm, Andreas Hoeschler wrote:

> Hello Richard,
>
> > GNUstep is obviously trying to be tolerant of programmer errors, and 
> > restrict the arguments to the valid range.
> > What behavior are you expecting?   Do you know if MacOS-X causes an  
> > exception to be raised or the object to be deallocated and nil 
> > returned?  The OpenStep spec and MacOS-X documentation don't specify 
> > the behavior, so technically there's nothing wrong with the current 
> > behavior.
>
> Imagine you have an interface with a field where users are supposed to 
> enter times. I have specified the format %H:%M. NSCalendarDate is to 
> be used to hold the time.
>
>       NSCalendarDate *date = [NSCalendarDate dateWithString:@"18:00" 
> calendarFormat:@"%H:%M"];
>       NSLog(@"date %@", date);
>
> 2003-07-03 21:17:17.340 FBTest[20695] date 0000-01-02 06:00:00 +0100
>
>       NSCalendarDate *date = [NSCalendarDate dateWithString:@"23:59" 
> calendarFormat:@"%H:%M"];
>       NSLog(@"date %@", date);
>
> 2003-07-03 21:21:19.064 FBTest[20772] date 0000-01-02 00:01:00 +0100
>
>
> Is this correct behaviour? I don't think so. If it is please enlighten 
> me. I am using a database adaptor that reads a time from the database 
> and uses

No ... that's not correct behavior ...  the calendar format was not 
being set correctly, so the output was in the wrong format (not HH:MM). 
 It's fixed in CVS now.

> >       NSCalendarDate *date = [[NSCalendarDate alloc] initWithYear:0 
> > month:0 day:0 hour:18 minute:0 second:0 timeZone:nil];
>
> to create an NSCalendarDate from just two integers. This works as 
> expected on MacOSX. However, it produces
>
> > 2003-07-03 20:44:40.516 FBTest[18838] File NSCalendarDate.m: 1239. In 
> > [NSCalendarDate -initWithYear:month:day:hour:minute:second:timeZone:] 
> > invalid month given - 0
>
> on GNUstep. I think there is something wrong with the current 
> behaviour.

In this case, your code is just wrong, as the documentation explicitly 
says you use a value of 1 to 12 for the month and 1 to 31 for day.
I don't know what you 'expect' and how MacOS-X works 'as expected' ... 
if you read the documentation for other intialisers too,
I think you would most likely expect the variable 'date' to be set to 
nil.

You should be setting a valid year, month, day and second.