include/wx/osx/cocoa/private/date.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/osx/cocoa/private/date.h
   3 // Purpose:     NSDate-related helpers
   4 // Author:      Vadim Zeitlin
   5 // Created:     2011-12-19
   6 // RCS-ID:      $Id: wxhead.h,v 1.12 2010-04-22 12:44:51 zeitlin Exp $
   7 // Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_OSX_COCOA_PRIVATE_DATE_H_
  12 #define _WX_OSX_COCOA_PRIVATE_DATE_H_
  13
  14 #include "wx/datetime.h"
  15
  16 namespace wxOSXImpl
  17 {
  18
  19 // Functions to convert between NSDate and wxDateTime.
  20
  21 // Returns an NSDate corresponding to the given wxDateTime which can be invalid
  22 // (in which case nil is returned).
  23 inline NSDate* NSDateFromWX(const wxDateTime& dt)
  24 {
  25     if ( !dt.IsValid() )
  26         return nil;
  27
  28     // Get the internal representation as a double used by NSDate.
  29     double ticks = dt.GetValue().ToDouble();
  30
  31     // wxDateTime uses milliseconds while NSDate uses (fractional) seconds.
  32     return [NSDate dateWithTimeIntervalSince1970:ticks/1000.];
  33 }
  34
  35
  36 // Returns wxDateTime corresponding to the given NSDate (which may be nil).
  37 inline wxDateTime NSDateToWX(const NSDate* d)
  38 {
  39     if ( !d )
  40         return wxDefaultDateTime;
  41
  42     // Reverse everything done above.
  43     wxLongLong ll;
  44     ll.Assign([d timeIntervalSince1970]*1000);
  45     wxDateTime dt(ll);
  46     return dt;
  47 }
  48
  49 } // namespace wxOSXImpl
  50
  51 #endif // _WX_OSX_COCOA_PRIVATE_DATE_H_