[ic] time tag with adjust in February bug?

Gert van der Spoel gert at 3edge.com
Mon Apr 1 09:32:59 UTC 2013



> -----Original Message-----
> From: interchange-users-bounces at icdevgroup.org [mailto:interchange-users-
> bounces at icdevgroup.org] On Behalf Of Gert van der Spoel
> Sent: maandag 1 april 2013 12:30
> To: interchange-users at icdevgroup.org
> Subject: Re: [ic] time tag with adjust in February bug?
> 
> > -----Original Message-----
> > From: interchange-users-bounces at icdevgroup.org [mailto:interchange-
> users-
> > bounces at icdevgroup.org] On Behalf Of Paul Jordan
> > Sent: maandag 1 april 2013 10:17
> > To: interchange-users at icdevgroup.org
> > Subject: Re: [ic] time tag with adjust in February bug?
> >
> > > users-bounces at icdevgroup.org] On Behalf Of Mike Heins
> > > Quoting Peter (peter at pajamian.dhs.org):
> > > > On 04/01/2013 12:08 PM, Peter wrote:
> > > > >On 04/01/2013 03:27 AM, Paul Jordan wrote:
> > > > >>
> > > > >>Doing this today:
> > > > >>
> > > > >>A)    [time]%c[/time] <br />
> > > > >>B) - 1d: [time adjust='-1 day']%c[/time] <br />
> > > > >>C) - 1m1d: [time adjust='-1 month 1 day']%c[/time] <br />
> > > > >>D) - 2m1d: [time  adjust='-2 month 1 day']%c[/time] <br />
> > > > >>
> > > > >>gives me:
> > > > >>
> > > > >>A)                Sun Mar 31 07:04:42 2013
> > > > >>B) - 1d:        Sat Mar 30 07:04:42 2013
> > > > >>C) - 1m1d:   Sat Mar 2 06:04:42 2013
> > > > >>D) - 2m1d:   Wed Jan 30 06:04:42 2013
> > > > >
> > > > >Is your version of Interchange from before or after May of 2009?
> The
> > > > >time adjustment code was completely rewritten then.
> > > >
> > > > Anyways, after further (off-list) discussion, the server is running
> > > > the newer time adjustment code.  having looked through the
> adjust_time
> > > > function again nothing jumps out at me that could cause this.  I
> would
> > > > need to debug on the server to make sure that the correct values are
> > > > being passed to mktime().  If so then it's going to be an issue with
> > > > POSIX::mktime().
> > >
> > > There is no "month". 1m is one minute, the "onth" makes no difference.
> > > And you can't do addition and subtraction by combining terms...
> > >
> > > This is April Fool's on European time, no?
> > > --
> > > Mike Heins
> >
> >
> > This bug is quite a coinkidink then:
> >
> > [time]%c[/time]<br />
> > [time adjust='-12 month']%c[/time]
> > [time adjust='-12 month 10 days']%c[/time]
> > ----------------------------------------------------
> > Mon Apr 1 02:14:17 2013
> > Sun Apr 1 02:14:17 2012
> > Thu Mar 22 02:15:18 2012
> 
> 
> Let me take the bait, april's fool or not ... The 1 minute difference, not
> sure ... But for the other ... Same issue you'd see if you take the date
> of
> 31st May 2013 and do -1 month 1 day  ...
> 
> What do you expect? 1 month down = April ... April has 30 days .. So 1
> month
> 1 day you'd say is: 29 April ... Well it does not work like that I think,
> because I tis fed to mktime 31-1 = 30   4-1=3 ... So that makes April 30th
> .. And for the above Feb 30 = March 2 because it compensates the days.
> 
> If you take 1st of June and do that -1 month -1 day it is fed to mktime as
> 1-1=0   5-1=4     mktime then apparently says: Oh I get 0 that means I
> need
> to take the last day of the previous month (30) and drop the month another
> nodge

That's notch, but I'm sure you got that hehe

 (3) ... So 30th of April and all looks good.
> 
> So the bottom line I'd say is: the time_adjust function is faulty as it
> does
> not properly feed information to mktime .. As Mike says: " And you can't
> do
> addition and subtraction by combining terms"  ... The code seems to say:
> Yes
> you can ... But the reality is: with this code you cannot.
> 
> CU,
> 
> Gert
> 
> 
> 
> 
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