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