i'm lost with ParseDate and FormatDate (wx2.9)

[Vadim Zeitlin]

On Fri, 01 Feb 2008 10:21:56 +0100 Riccardo Cohen <rcohen at articque.com> wrote:

RC> I don't know if I'm missing something, but it seems that ParseDate and 
RC> FormatDate do not work correcly together.

 ParseDate() uses heuristics for parsing dates and so is incapable of
parsing 01/06 correctly in both US and Europe. Maybe we can make this more
accurate by looking at the month/day order in %x but it still won't be
perfect. If you know that your date is going to be in the system format,
use ParseFormat("%x"). And if you know that it's going to be in some fixed
format, use ParseFormat() with it.

RC>    tmpd=wxT("01/07/2000");
RC>    str+=wxString::Format(wxT("string is %s\n"),tmpd);
RC>    adate.ParseFormat((const wxChar *)tmpd,wxT("%x"));
RC>    str+=wxString::Format(wxT("Month is %d Year is 
RC> %d\n"),adate.GetMonth(),adate.GetYear());
RC>    tmpd=adate.Format(wxT("%x"));
RC>    str+=wxString::Format(wxT("Format is %s\n"),tmpd);
RC>    adate.ParseFormat((const wxChar *)tmpd,wxT("%x"));
RC>    str+=wxString::Format(wxT("Month is %d Year is 
RC> %d\n"),adate.GetMonth(),adate.GetYear());
RC>    tmpd=adate.Format(wxT("%x"));
RC>    str+=wxString::Format(wxT("Format is %s\n\n"),tmpd);
...
RC> Results : FR WINDOWS
RC> --------------------
...
RC> Parse %x/Format %x
RC> string is 01/07/2000
RC> Month is 6 Year is 2000
RC> Format is 01/07/2000
RC> Month is 6 Year is 2000
RC> Format is 01/07/2000
RC> 
RC> ===> OK
RC> 
RC> Results : GB WINDOWS
RC> --------------------
...
RC> Parse %x/Format %x
RC> string is 01/07/2000
RC> Month is 6 Year is 2000
RC> Format is 01/07/2000
RC> Month is 6 Year is 2000
RC> Format is 01/07/2000
RC> 
RC> ===> #BAD month is the second numbe

 I don't understand why is this bad. The result is exactly the same as for
French Windows above.

RC> Results : FR MACOSX
RC> --------------------
RC> ParseDate/FormatDate
...
RC> Parse %x/Format %x
RC> string is 01/07/2000
RC> Month is 6 Year is 2020
RC> Format is 01.07.2020
RC> Month is 6 Year is 2020
RC> Format is 01.07.2020
RC> 
RC> ===> #BAD year not parsed correctly

 This looks like a serious bug. I don't know where does it come from but
this should definitely be fixed...

 Regards,
VZ

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