don't pass NULL pointer to printf(), this crashes Solaris printf

[wxWidgets.git] / include / wx / datetime.h

diff --git a/include/wx/datetime.h b/include/wx/datetime.h
index e51a7934bf6c1ce706294aa061954aee77fe6029..5e6f63d698dfec1683d2f8c6f7c615e3ba1619db 100644 (file)
--- a/include/wx/datetime.h
+++ b/include/wx/datetime.h
@@ -7,35 +7,47 @@
 // Created:     10.02.99
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
 // Created:     10.02.99
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>

-// Licence:     wxWindows license
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_DATETIME_H
 #define _WX_DATETIME_H
 
 /////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_DATETIME_H
 #define _WX_DATETIME_H
 

-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)

     #pragma interface "datetime.h"
 #endif
 
     #pragma interface "datetime.h"
 #endif
 

+#include "wx/defs.h"
+
+#if wxUSE_DATETIME
+
+#ifndef __WXWINCE__

 #include <time.h>
 #include <time.h>

+#else
+#include "wx/msw/wince/time.h"
+#endif
+

 #include <limits.h>             // for INT_MIN
 
 #include "wx/longlong.h"
 
 #include <limits.h>             // for INT_MIN
 
 #include "wx/longlong.h"
 

-class WXDLLEXPORT wxDateTime;
-class WXDLLEXPORT wxTimeSpan;
-class WXDLLEXPORT wxDateSpan;
+class WXDLLIMPEXP_BASE wxDateTime;
+class WXDLLIMPEXP_BASE wxTimeSpan;
+class WXDLLIMPEXP_BASE wxDateSpan;
+
+#include "wx/dynarray.h"

 
 

-// don't use inline functions in debug builds - we don't care about
-// performances and this only leads to increased rebuild time (because every
-// time an inline method is changed, all files including the header must be
-// rebuilt)
-#ifdef __WXDEBUG__
-    #define inline
-#endif // Debug
+// not all c-runtimes are based on 1/1/1970 being (time_t) 0
+// set this to the corresponding value in seconds 1/1/1970 has on your
+// systems c-runtime

 
 

+#if defined(__WXMAC__) && !defined(__DARWIN__) && __MSL__ < 0x6000
+    #define WX_TIME_BASE_OFFSET ( 2082844800L + 126144000L )
+#else
+    #define WX_TIME_BASE_OFFSET 0
+#endif

 /*
 /*

- * TODO Well, everything :-)
+ * TODO

  *
  * + 1. Time zones with minutes (make TimeZone a class)
  * ? 2. getdate() function like under Solaris
  *
  * + 1. Time zones with minutes (make TimeZone a class)
  * ? 2. getdate() function like under Solaris


@@ -63,7 +75,7 @@ class WXDLLEXPORT wxDateSpan;
   wxTimeSpan + wxTimeSpan = wxTimeSpan
   wxDateSpan + wxDateSpan = wxDateSpan
 
   wxTimeSpan + wxTimeSpan = wxTimeSpan
   wxDateSpan + wxDateSpan = wxDateSpan
 

-  substraction
+  subtraction

   ------------
   wxDateTime - wxDateTime = wxTimeSpan
   wxDateTime - wxTimeSpan = wxDateTime
   ------------
   wxDateTime - wxDateTime = wxTimeSpan
   wxDateTime - wxTimeSpan = wxDateTime


@@ -84,7 +96,7 @@ class WXDLLEXPORT wxDateSpan;
   -wxDateSpan = wxDateSpan
 
   For each binary operation OP (+, -, *) we have the following operatorOP=() as
   -wxDateSpan = wxDateSpan
 
   For each binary operation OP (+, -, *) we have the following operatorOP=() as

-  a method and the method with a symbolic name OPER (Add, Substract, Multiply)
+  a method and the method with a symbolic name OPER (Add, Subtract, Multiply)

   as a synonym for it and another const method with the same name which returns
   the changed copy of the object and operatorOP() as a global function which is
   implemented in terms of the const version of OPEN. For the unary - we have
   as a synonym for it and another const method with the same name which returns
   the changed copy of the object and operatorOP() as a global function which is
   implemented in terms of the const version of OPEN. For the unary - we have


@@ -96,16 +108,19 @@ class WXDLLEXPORT wxDateSpan;
 // argument for arguments of type wxDateTime; it is also returned by all
 // functions returning wxDateTime on failure (this is why it is also called
 // wxInvalidDateTime)
 // argument for arguments of type wxDateTime; it is also returned by all
 // functions returning wxDateTime on failure (this is why it is also called
 // wxInvalidDateTime)

-class WXDLLEXPORT wxDateTime;
+class WXDLLIMPEXP_BASE wxDateTime;
+
+extern WXDLLIMPEXP_DATA_BASE(const wxChar*) wxDefaultDateTimeFormat;
+extern WXDLLIMPEXP_DATA_BASE(const wxChar*) wxDefaultTimeSpanFormat;
+extern WXDLLIMPEXP_DATA_BASE(const wxDateTime) wxDefaultDateTime;

 
 

-WXDLLEXPORT_DATA(extern wxDateTime&) wxDefaultDateTime;

 #define wxInvalidDateTime wxDefaultDateTime
 
 // ----------------------------------------------------------------------------
 // wxDateTime represents an absolute moment in the time
 // ----------------------------------------------------------------------------
 
 #define wxInvalidDateTime wxDefaultDateTime
 
 // ----------------------------------------------------------------------------
 // wxDateTime represents an absolute moment in the time
 // ----------------------------------------------------------------------------
 

-class WXDLLEXPORT wxDateTime
+class WXDLLIMPEXP_BASE wxDateTime

 {
 public:
     // types
 {
 public:
     // types


@@ -316,6 +331,12 @@ public:
         // day or not
         //
         // TODO move this to intl.h
         // day or not
         //
         // TODO move this to intl.h

+
+// Required for WinCE
+#ifdef USA
+#undef USA
+#endif
+

     enum Country
     {
         Country_Unknown, // no special information for this country
     enum Country
     {
         Country_Unknown, // no special information for this country


@@ -335,10 +356,8 @@ public:
         Country_WesternEurope_End = UK,
 
         Russia,
         Country_WesternEurope_End = UK,
 
         Russia,

-

         USA
     };
         USA
     };

-

         // symbolic names for the months
     enum Month
     {
         // symbolic names for the months
     enum Month
     {


@@ -377,7 +396,7 @@ public:
 
         // a class representing a time zone: basicly, this is just an offset
         // (in seconds) from GMT
 
         // a class representing a time zone: basicly, this is just an offset
         // (in seconds) from GMT

-    class WXDLLEXPORT TimeZone
+    class WXDLLIMPEXP_BASE TimeZone

     {
     public:
         TimeZone(TZ tz);
     {
     public:
         TimeZone(TZ tz);


@@ -397,7 +416,7 @@ public:
         // NB: this struct should always be kept normalized (i.e. mon should
         //     be < 12, 1 <= day <= 31 &c), so use AddMonths(), AddDays()
         //     instead of modifying the member fields directly!
         // NB: this struct should always be kept normalized (i.e. mon should
         //     be < 12, 1 <= day <= 31 &c), so use AddMonths(), AddDays()
         //     instead of modifying the member fields directly!

-    struct Tm
+    struct WXDLLIMPEXP_BASE Tm

     {
         wxDateTime_t msec, sec, min, hour, mday;
         Month mon;
     {
         wxDateTime_t msec, sec, min, hour, mday;
         Month mon;


@@ -447,7 +466,7 @@ public:
         // get the current country
     static Country GetCountry();
 
         // get the current country
     static Country GetCountry();
 

-        // return TRUE if the country is a West European one (in practice,
+        // return true if the country is a West European one (in practice,

         // this means that the same DST rules as for EEC apply)
     static bool IsWestEuropeanCountry(Country country = Country_Default);
 
         // this means that the same DST rules as for EEC apply)
     static bool IsWestEuropeanCountry(Country country = Country_Default);
 


@@ -463,7 +482,7 @@ public:
         // return the current month
     static Month GetCurrentMonth(Calendar cal = Gregorian);
 
         // return the current month
     static Month GetCurrentMonth(Calendar cal = Gregorian);
 

-        // returns TRUE if the given year is a leap year in the given calendar
+        // returns true if the given year is a leap year in the given calendar

     static bool IsLeapYear(int year = Inv_Year, Calendar cal = Gregorian);
 
         // get the century (19 for 1999, 20 for 2000 and -5 for 492 BC)
     static bool IsLeapYear(int year = Inv_Year, Calendar cal = Gregorian);
 
         // get the century (19 for 1999, 20 for 2000 and -5 for 492 BC)


@@ -492,7 +511,7 @@ public:
         // get the AM and PM strings in the current locale (may be empty)
     static void GetAmPmStrings(wxString *am, wxString *pm);
 
         // get the AM and PM strings in the current locale (may be empty)
     static void GetAmPmStrings(wxString *am, wxString *pm);
 

-        // return TRUE if the given country uses DST for this year
+        // return true if the given country uses DST for this year

     static bool IsDSTApplicable(int year = Inv_Year,
                                 Country country = Country_Default);
 
     static bool IsDSTApplicable(int year = Inv_Year,
                                 Country country = Country_Default);
 


@@ -510,6 +529,10 @@ public:
         // return the wxDateTime object for the current time
     static inline wxDateTime Now();
 
         // return the wxDateTime object for the current time
     static inline wxDateTime Now();
 

+        // return the wxDateTime object for the current time with millisecond
+        // precision (if available on this platform)
+    static wxDateTime UNow();
+

         // return the wxDateTime object for today midnight: i.e. as Now() but
         // with time set to 0
     static inline wxDateTime Today();
         // return the wxDateTime object for today midnight: i.e. as Now() but
         // with time set to 0
     static inline wxDateTime Today();


@@ -520,10 +543,13 @@ public:
     // ------------------------------------------------------------------------
 
         // default ctor does not initialize the object, use Set()!
     // ------------------------------------------------------------------------
 
         // default ctor does not initialize the object, use Set()!

-    wxDateTime() { }
+    wxDateTime() { m_time = wxLongLong((long)ULONG_MAX, ULONG_MAX); }

 
         // from time_t: seconds since the Epoch 00:00:00 UTC, Jan 1, 1970)
 
         // from time_t: seconds since the Epoch 00:00:00 UTC, Jan 1, 1970)

+#if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400))
+// VA C++ confuses this with wxDateTime(double jdn) thinking it is a duplicate declaration

     inline wxDateTime(time_t timet);
     inline wxDateTime(time_t timet);

+#endif

         // from broken down time/date (only for standard Unix range)
     inline wxDateTime(const struct tm& tm);
         // from broken down time/date (any range)
         // from broken down time/date (only for standard Unix range)
     inline wxDateTime(const struct tm& tm);
         // from broken down time/date (any range)


@@ -539,7 +565,7 @@ public:
                       wxDateTime_t millisec = 0);
         // from separate values for each component with explicit date
     inline wxDateTime(wxDateTime_t day,             // day of the month
                       wxDateTime_t millisec = 0);
         // from separate values for each component with explicit date
     inline wxDateTime(wxDateTime_t day,             // day of the month

-                      Month        month = Inv_Month,
+                      Month        month,

                       int          year = Inv_Year, // 1999, not 99 please!
                       wxDateTime_t hour = 0,
                       wxDateTime_t minute = 0,
                       int          year = Inv_Year, // 1999, not 99 please!
                       wxDateTime_t hour = 0,
                       wxDateTime_t minute = 0,


@@ -558,8 +584,11 @@ public:
         // set to the current time
     inline wxDateTime& SetToCurrent();
 
         // set to the current time
     inline wxDateTime& SetToCurrent();
 

+#if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400))
+// VA C++ confuses this with wxDateTime(double jdn) thinking it is a duplicate declaration

         // set to given time_t value
     inline wxDateTime& Set(time_t timet);
         // set to given time_t value
     inline wxDateTime& Set(time_t timet);

+#endif

 
         // set to given broken down time/date
     wxDateTime& Set(const struct tm& tm);
 
         // set to given broken down time/date
     wxDateTime& Set(const struct tm& tm);


@@ -579,7 +608,7 @@ public:
         // from separate values for each component with explicit date
         // (defaults for month and year are the current values)
     wxDateTime& Set(wxDateTime_t day,
         // from separate values for each component with explicit date
         // (defaults for month and year are the current values)
     wxDateTime& Set(wxDateTime_t day,

-                    Month        month = Inv_Month,
+                    Month        month,

                     int          year = Inv_Year, // 1999, not 99 please!
                     wxDateTime_t hour = 0,
                     wxDateTime_t minute = 0,
                     int          year = Inv_Year, // 1999, not 99 please!
                     wxDateTime_t hour = 0,
                     wxDateTime_t minute = 0,


@@ -624,8 +653,10 @@ public:
     // ------------------------------------------------------------------------
 
         // set to the given week day in the same week as this one
     // ------------------------------------------------------------------------
 
         // set to the given week day in the same week as this one

-    wxDateTime& SetToWeekDayInSameWeek(WeekDay weekday);
-    inline wxDateTime GetWeekDayInSameWeek(WeekDay weekday) const;
+    wxDateTime& SetToWeekDayInSameWeek(WeekDay weekday,
+                                       WeekFlags flags = Monday_First);
+    inline wxDateTime GetWeekDayInSameWeek(WeekDay weekday,
+                                           WeekFlags flags = Monday_First) const;

 
         // set to the next week day following this one
     wxDateTime& SetToNextWeekDay(WeekDay weekday);
 
         // set to the next week day following this one
     wxDateTime& SetToNextWeekDay(WeekDay weekday);


@@ -636,7 +667,7 @@ public:
     inline wxDateTime GetPrevWeekDay(WeekDay weekday) const;
 
         // set to Nth occurence of given weekday in the given month of the
     inline wxDateTime GetPrevWeekDay(WeekDay weekday) const;
 
         // set to Nth occurence of given weekday in the given month of the

-        // given year (time is set to 0), return TRUE on success and FALSE on
+        // given year (time is set to 0), return true on success and false on

         // failure. n may be positive (1..5) or negative to count from the end
         // of the month (see helper function SetToLastWeekDay())
     bool SetToWeekDay(WeekDay weekday,
         // failure. n may be positive (1..5) or negative to count from the end
         // of the month (see helper function SetToLastWeekDay())
     bool SetToWeekDay(WeekDay weekday,


@@ -657,10 +688,23 @@ public:
                                      int year = Inv_Year);
 
         // sets the date to the given day of the given week in the year,
                                      int year = Inv_Year);
 
         // sets the date to the given day of the given week in the year,

-        // returns TRUE on success and FALSE if given date doesn't exist (e.g.
+        // returns true on success and false if given date doesn't exist (e.g.

         // numWeek is > 53)
         // numWeek is > 53)

-    bool SetToTheWeek(wxDateTime_t numWeek, WeekDay weekday = Mon);
-    inline wxDateTime GetWeek(wxDateTime_t numWeek, WeekDay weekday = Mon) const;
+        //
+        // these functions are badly defined as they're not the reverse of
+        // GetWeekOfYear(), use SetToTheWeekOfYear() instead
+    wxDEPRECATED( bool SetToTheWeek(wxDateTime_t numWeek,
+                                    WeekDay weekday = Mon,
+                                    WeekFlags flags = Monday_First) );
+    wxDEPRECATED( wxDateTime GetWeek(wxDateTime_t numWeek,
+                                     WeekDay weekday = Mon,
+                                     WeekFlags flags = Monday_First) const );
+
+        // returns the date corresponding to the given week day of the given
+        // week (in ISO notation) of the specified year
+    static wxDateTime SetToWeekOfYear(int year,
+                                      wxDateTime_t numWeek,
+                                      WeekDay weekday = Mon);

 
         // sets the date to the last day of the given (or current) month or the
         // given (or current) year
 
         // sets the date to the last day of the given (or current) month or the
         // given (or current) year


@@ -713,26 +757,42 @@ public:
         //      religious holidays (Easter...) or moon/solar eclipses? Some
         //      algorithms can be found in the calendar FAQ
 
         //      religious holidays (Easter...) or moon/solar eclipses? Some
         //      algorithms can be found in the calendar FAQ
 

-    // timezone stuff: a wxDateTime object constructed using given
-    // day/month/year/hour/min/sec values correspond to this moment in local
-    // time. Using the functions below, it may be converted to another time
-    // zone (for example, the Unix epoch is wxDateTime(1, Jan, 1970).ToGMT())
+
+    // Timezone stuff: a wxDateTime object constructed using given
+    // day/month/year/hour/min/sec values is interpreted as this moment in
+    // local time. Using the functions below, it may be converted to another
+    // time zone (e.g., the Unix epoch is wxDateTime(1, Jan, 1970).ToGMT()).

     //
     //

-    // these functions try to handle DST internally, but there is no magical
+    // These functions try to handle DST internally, but there is no magical

     // way to know all rules for it in all countries in the world, so if the
     // program can handle it itself (or doesn't want to handle it at all for
     // whatever reason), the DST handling can be disabled with noDST.
     // way to know all rules for it in all countries in the world, so if the
     // program can handle it itself (or doesn't want to handle it at all for
     // whatever reason), the DST handling can be disabled with noDST.

-    //
-    // Converting to the local time zone doesn't do anything.

     // ------------------------------------------------------------------------
 
         // transform to any given timezone
     // ------------------------------------------------------------------------
 
         // transform to any given timezone

-    inline wxDateTime ToTimezone(const TimeZone& tz, bool noDST = FALSE) const;
-    wxDateTime& MakeTimezone(const TimeZone& tz, bool noDST = FALSE);
-
-        // transform to GMT/UTC
-    wxDateTime ToGMT(bool noDST = FALSE) const { return ToTimezone(GMT0, noDST); }
-    wxDateTime& MakeGMT(bool noDST = FALSE) { return MakeTimezone(GMT0, noDST); }
+    inline wxDateTime ToTimezone(const TimeZone& tz, bool noDST = false) const;
+    wxDateTime& MakeTimezone(const TimeZone& tz, bool noDST = false);
+
+#if wxABI_VERSION >= 20602
+        // interpret current value as being in another timezone and transform
+        // it to local one
+    inline wxDateTime FromTimezone(const TimeZone& tz, bool noDST = false) const;
+    wxDateTime& MakeFromTimezone(const TimeZone& tz, bool noDST = false);
+#endif // ABI >= 2.6.2
+
+        // transform to/from GMT/UTC
+    wxDateTime ToUTC(bool noDST = false) const { return ToTimezone(UTC, noDST); }
+    wxDateTime& MakeUTC(bool noDST = false) { return MakeTimezone(UTC, noDST); }
+
+    wxDateTime ToGMT(bool noDST = false) const { return ToUTC(noDST); }
+    wxDateTime& MakeGMT(bool noDST = false) { return MakeUTC(noDST); }
+
+#if wxABI_VERSION >= 20602
+    wxDateTime FromUTC(bool noDST = false) const
+        { return FromTimezone(UTC, noDST); }
+    wxDateTime& MakeFromUTC(bool noDST = false)
+        { return MakeFromTimezone(UTC, noDST); }
+#endif // ABI >= 2.6.2

 
         // is daylight savings time in effect at this moment according to the
         // rules of the specified country?
 
         // is daylight savings time in effect at this moment according to the
         // rules of the specified country?


@@ -741,6 +801,7 @@ public:
         // the information is not available (this is compatible with ANSI C)
     int IsDST(Country country = Country_Default) const;
 
         // the information is not available (this is compatible with ANSI C)
     int IsDST(Country country = Country_Default) const;
 

+

     // accessors: many of them take the timezone parameter which indicates the
     // timezone for which to make the calculations and the default value means
     // to do it for the current timezone of this machine (even if the function
     // accessors: many of them take the timezone parameter which indicates the
     // timezone for which to make the calculations and the default value means
     // to do it for the current timezone of this machine (even if the function


@@ -748,8 +809,8 @@ public:
     // result of timezone shift)
     // ------------------------------------------------------------------------
 
     // result of timezone shift)
     // ------------------------------------------------------------------------
 

-        // is the date valid (TRUE even for non initialized objects)?
-    inline bool IsValid() const { return this != &wxInvalidDateTime; }
+        // is the date valid?
+    inline bool IsValid() const { return m_time != wxInvalidDateTime.m_time; }

 
         // get the broken down date/time representation in the given timezone
         //
 
         // get the broken down date/time representation in the given timezone
         //


@@ -763,28 +824,28 @@ public:
     inline time_t GetTicks() const;
 
         // get the year (returns Inv_Year if date is invalid)
     inline time_t GetTicks() const;
 
         // get the year (returns Inv_Year if date is invalid)

-    int GetYear(const TimeZone& tz = Local) const 
+    int GetYear(const TimeZone& tz = Local) const

             { return GetTm(tz).year; }
         // get the month (Inv_Month if date is invalid)
             { return GetTm(tz).year; }
         // get the month (Inv_Month if date is invalid)

-    Month GetMonth(const TimeZone& tz = Local) const 
+    Month GetMonth(const TimeZone& tz = Local) const

             { return (Month)GetTm(tz).mon; }
         // get the month day (in 1..31 range, 0 if date is invalid)
             { return (Month)GetTm(tz).mon; }
         // get the month day (in 1..31 range, 0 if date is invalid)

-    wxDateTime_t GetDay(const TimeZone& tz = Local) const 
+    wxDateTime_t GetDay(const TimeZone& tz = Local) const

             { return GetTm(tz).mday; }
         // get the day of the week (Inv_WeekDay if date is invalid)
             { return GetTm(tz).mday; }
         // get the day of the week (Inv_WeekDay if date is invalid)

-    WeekDay GetWeekDay(const TimeZone& tz = Local) const 
+    WeekDay GetWeekDay(const TimeZone& tz = Local) const

             { return GetTm(tz).GetWeekDay(); }
         // get the hour of the day
             { return GetTm(tz).GetWeekDay(); }
         // get the hour of the day

-    wxDateTime_t GetHour(const TimeZone& tz = Local) const 
+    wxDateTime_t GetHour(const TimeZone& tz = Local) const

             { return GetTm(tz).hour; }
         // get the minute
             { return GetTm(tz).hour; }
         // get the minute

-    wxDateTime_t GetMinute(const TimeZone& tz = Local) const 
+    wxDateTime_t GetMinute(const TimeZone& tz = Local) const

             { return GetTm(tz).min; }
         // get the second
             { return GetTm(tz).min; }
         // get the second

-    wxDateTime_t GetSecond(const TimeZone& tz = Local) const 
+    wxDateTime_t GetSecond(const TimeZone& tz = Local) const

             { return GetTm(tz).sec; }
         // get milliseconds
             { return GetTm(tz).sec; }
         // get milliseconds

-    wxDateTime_t GetMillisecond(const TimeZone& tz = Local) const 
+    wxDateTime_t GetMillisecond(const TimeZone& tz = Local) const

             { return GetTm(tz).msec; }
 
         // get the day since the year start (1..366, 0 if date is invalid)
             { return GetTm(tz).msec; }
 
         // get the day since the year start (1..366, 0 if date is invalid)


@@ -810,23 +871,32 @@ public:
         //     adoption of the Gregorian calendar is simply unknown.
     bool IsGregorianDate(GregorianAdoption country = Gr_Standard) const;
 
         //     adoption of the Gregorian calendar is simply unknown.
     bool IsGregorianDate(GregorianAdoption country = Gr_Standard) const;
 

+    // dos date and time format
+    // ------------------------------------------------------------------------
+
+        // set from the DOS packed format
+    wxDateTime& SetFromDOS(unsigned long ddt);
+
+        // pack the date in DOS format
+    unsigned long GetAsDOS() const;
+

     // comparison (see also functions below for operator versions)
     // ------------------------------------------------------------------------
 
     // comparison (see also functions below for operator versions)
     // ------------------------------------------------------------------------
 

-        // returns TRUE if the two moments are strictly identical
+        // returns true if the two moments are strictly identical

     inline bool IsEqualTo(const wxDateTime& datetime) const;
 
     inline bool IsEqualTo(const wxDateTime& datetime) const;
 

-        // returns TRUE if the date is strictly earlier than the given one
+        // returns true if the date is strictly earlier than the given one

     inline bool IsEarlierThan(const wxDateTime& datetime) const;
 
     inline bool IsEarlierThan(const wxDateTime& datetime) const;
 

-        // returns TRUE if the date is strictly later than the given one
+        // returns true if the date is strictly later than the given one

     inline bool IsLaterThan(const wxDateTime& datetime) const;
 
     inline bool IsLaterThan(const wxDateTime& datetime) const;
 

-        // returns TRUE if the date is strictly in the given range
+        // returns true if the date is strictly in the given range

     inline bool IsStrictlyBetween(const wxDateTime& t1,
                                   const wxDateTime& t2) const;
 
     inline bool IsStrictlyBetween(const wxDateTime& t1,
                                   const wxDateTime& t2) const;
 

-        // returns TRUE if the date is in the given range
+        // returns true if the date is in the given range

     inline bool IsBetween(const wxDateTime& t1, const wxDateTime& t2) const;
 
         // do these two objects refer to the same date?
     inline bool IsBetween(const wxDateTime& t1, const wxDateTime& t2) const;
 
         // do these two objects refer to the same date?


@@ -838,6 +908,42 @@ public:
         // are these two objects equal up to given timespan?
     inline bool IsEqualUpTo(const wxDateTime& dt, const wxTimeSpan& ts) const;
 
         // are these two objects equal up to given timespan?
     inline bool IsEqualUpTo(const wxDateTime& dt, const wxTimeSpan& ts) const;
 

+    inline bool operator<(const wxDateTime& dt) const
+    {
+        wxASSERT_MSG( IsValid() && dt.IsValid(), _T("invalid wxDateTime") );
+        return GetValue() < dt.GetValue();
+    }
+
+    inline bool operator<=(const wxDateTime& dt) const
+    {
+        wxASSERT_MSG( IsValid() && dt.IsValid(), _T("invalid wxDateTime") );
+        return GetValue() <= dt.GetValue();
+    }
+
+    inline bool operator>(const wxDateTime& dt) const
+    {
+        wxASSERT_MSG( IsValid() && dt.IsValid(), _T("invalid wxDateTime") );
+        return GetValue() > dt.GetValue();
+    }
+
+    inline bool operator>=(const wxDateTime& dt) const
+    {
+        wxASSERT_MSG( IsValid() && dt.IsValid(), _T("invalid wxDateTime") );
+        return GetValue() >= dt.GetValue();
+    }
+
+    inline bool operator==(const wxDateTime& dt) const
+    {
+        wxASSERT_MSG( IsValid() && dt.IsValid(), _T("invalid wxDateTime") );
+        return GetValue() == dt.GetValue();
+    }
+
+    inline bool operator!=(const wxDateTime& dt) const
+    {
+        wxASSERT_MSG( IsValid() && dt.IsValid(), _T("invalid wxDateTime") );
+        return GetValue() != dt.GetValue();
+    }
+

     // arithmetics with dates (see also below for more operators)
     // ------------------------------------------------------------------------
 
     // arithmetics with dates (see also below for more operators)
     // ------------------------------------------------------------------------
 


@@ -847,13 +953,25 @@ public:
     inline wxDateTime& Add(const wxTimeSpan& diff);
         // add a time span (positive or negative)
     inline wxDateTime& operator+=(const wxTimeSpan& diff);
     inline wxDateTime& Add(const wxTimeSpan& diff);
         // add a time span (positive or negative)
     inline wxDateTime& operator+=(const wxTimeSpan& diff);

+    inline wxDateTime operator+(const wxTimeSpan& ts) const
+    {
+        wxDateTime dt(*this);
+        dt.Add(ts);
+        return dt;
+    }

 
         // return the difference of the date with a time span
 
         // return the difference of the date with a time span

-    inline wxDateTime Substract(const wxTimeSpan& diff) const;
-        // substract a time span (positive or negative)
-    inline wxDateTime& Substract(const wxTimeSpan& diff);
-        // substract a time span (positive or negative)
+    inline wxDateTime Subtract(const wxTimeSpan& diff) const;
+        // subtract a time span (positive or negative)
+    inline wxDateTime& Subtract(const wxTimeSpan& diff);
+        // subtract a time span (positive or negative)

     inline wxDateTime& operator-=(const wxTimeSpan& diff);
     inline wxDateTime& operator-=(const wxTimeSpan& diff);

+    inline wxDateTime operator-(const wxTimeSpan& ts) const
+    {
+        wxDateTime dt(*this);
+        dt.Subtract(ts);
+        return dt;
+    }

 
         // return the sum of the date with a date span
     inline wxDateTime Add(const wxDateSpan& diff) const;
 
         // return the sum of the date with a date span
     inline wxDateTime Add(const wxDateSpan& diff) const;


@@ -861,16 +979,29 @@ public:
     wxDateTime& Add(const wxDateSpan& diff);
         // add a date span (positive or negative)
     inline wxDateTime& operator+=(const wxDateSpan& diff);
     wxDateTime& Add(const wxDateSpan& diff);
         // add a date span (positive or negative)
     inline wxDateTime& operator+=(const wxDateSpan& diff);

+    inline wxDateTime operator+(const wxDateSpan& ds) const
+    {
+        wxDateTime dt(*this);
+        dt.Add(ds);
+        return dt;
+    }

 
         // return the difference of the date with a date span
 
         // return the difference of the date with a date span

-    inline wxDateTime Substract(const wxDateSpan& diff) const;
-        // substract a date span (positive or negative)
-    inline wxDateTime& Substract(const wxDateSpan& diff);
-        // substract a date span (positive or negative)
+    inline wxDateTime Subtract(const wxDateSpan& diff) const;
+        // subtract a date span (positive or negative)
+    inline wxDateTime& Subtract(const wxDateSpan& diff);
+        // subtract a date span (positive or negative)

     inline wxDateTime& operator-=(const wxDateSpan& diff);
     inline wxDateTime& operator-=(const wxDateSpan& diff);

+    inline wxDateTime operator-(const wxDateSpan& ds) const
+    {
+        wxDateTime dt(*this);
+        dt.Subtract(ds);
+        return dt;
+    }

 
         // return the difference between two dates
 
         // return the difference between two dates

-    inline wxTimeSpan Substract(const wxDateTime& dt) const;
+    inline wxTimeSpan Subtract(const wxDateTime& dt) const;
+    inline wxTimeSpan operator-(const wxDateTime& dt2) const;

 
     // conversion to/from text: all conversions from text return the pointer to
     // the next character following the date specification (i.e. the one where
 
     // conversion to/from text: all conversions from text return the pointer to
     // the next character following the date specification (i.e. the one where


@@ -885,7 +1016,7 @@ public:
         // default, they will not change if they had valid values or will
         // default to Today() otherwise)
     const wxChar *ParseFormat(const wxChar *date,
         // default, they will not change if they had valid values or will
         // default to Today() otherwise)
     const wxChar *ParseFormat(const wxChar *date,

-                              const wxChar *format = _T("%c"),
+                              const wxChar *format = wxDefaultDateTimeFormat,

                               const wxDateTime& dateDef = wxDefaultDateTime);
         // parse a string containing the date/time in "free" format, this
         // function will try to make an educated guess at the string contents
                               const wxDateTime& dateDef = wxDefaultDateTime);
         // parse a string containing the date/time in "free" format, this
         // function will try to make an educated guess at the string contents


@@ -900,7 +1031,7 @@ public:
         // argument corresponds to the preferred date and time representation
         // for the current locale) and returns the string containing the
         // resulting text representation
         // argument corresponds to the preferred date and time representation
         // for the current locale) and returns the string containing the
         // resulting text representation

-    wxString Format(const wxChar *format = _T("%c"),
+    wxString Format(const wxChar *format = wxDefaultDateTimeFormat,

                     const TimeZone& tz = Local) const;
         // preferred date representation for the current locale
     wxString FormatDate() const { return Format(_T("%x")); }
                     const TimeZone& tz = Local) const;
         // preferred date representation for the current locale
     wxString FormatDate() const { return Format(_T("%x")); }


@@ -943,7 +1074,7 @@ private:
     // fixed to 1000
     static const long TIME_T_FACTOR;
 
     // fixed to 1000
     static const long TIME_T_FACTOR;
 

-    // returns TRUE if we fall in range in which we can use standard ANSI C
+    // returns true if we fall in range in which we can use standard ANSI C

     // functions
     inline bool IsInStdRange() const;
 
     // functions
     inline bool IsInStdRange() const;
 


@@ -955,34 +1086,34 @@ private:
 
 // ----------------------------------------------------------------------------
 // This class contains a difference between 2 wxDateTime values, so it makes
 
 // ----------------------------------------------------------------------------
 // This class contains a difference between 2 wxDateTime values, so it makes

-// sense to add it to wxDateTime and it is the result of substraction of 2
+// sense to add it to wxDateTime and it is the result of subtraction of 2

 // objects of that class. See also wxDateSpan.
 // ----------------------------------------------------------------------------
 
 // objects of that class. See also wxDateSpan.
 // ----------------------------------------------------------------------------
 

-class WXDLLEXPORT wxTimeSpan
+class WXDLLIMPEXP_BASE wxTimeSpan

 {
 public:
     // constructors
     // ------------------------------------------------------------------------
 
         // return the timespan for the given number of seconds
 {
 public:
     // constructors
     // ------------------------------------------------------------------------
 
         // return the timespan for the given number of seconds

-    static wxTimeSpan Seconds(int sec) { return wxTimeSpan(0, 0, sec); }
+    static wxTimeSpan Seconds(long sec) { return wxTimeSpan(0, 0, sec); }

     static wxTimeSpan Second() { return Seconds(1); }
 
         // return the timespan for the given number of minutes
     static wxTimeSpan Second() { return Seconds(1); }
 
         // return the timespan for the given number of minutes

-    static wxTimeSpan Minutes(int min) { return wxTimeSpan(0, min, 0 ); }
+    static wxTimeSpan Minutes(long min) { return wxTimeSpan(0, min, 0 ); }

     static wxTimeSpan Minute() { return Minutes(1); }
 
         // return the timespan for the given number of hours
     static wxTimeSpan Minute() { return Minutes(1); }
 
         // return the timespan for the given number of hours

-    static wxTimeSpan Hours(int hours) { return wxTimeSpan(hours, 0, 0); }
+    static wxTimeSpan Hours(long hours) { return wxTimeSpan(hours, 0, 0); }

     static wxTimeSpan Hour() { return Hours(1); }
 
         // return the timespan for the given number of days
     static wxTimeSpan Hour() { return Hours(1); }
 
         // return the timespan for the given number of days

-    static wxTimeSpan Days(int days) { return Hours(24 * days); }
+    static wxTimeSpan Days(long days) { return Hours(24 * days); }

     static wxTimeSpan Day() { return Days(1); }
 
         // return the timespan for the given number of weeks
     static wxTimeSpan Day() { return Days(1); }
 
         // return the timespan for the given number of weeks

-    static wxTimeSpan Weeks(int days) { return Days(7 * days); }
+    static wxTimeSpan Weeks(long days) { return Days(7 * days); }

     static wxTimeSpan Week() { return Weeks(1); }
 
         // default ctor constructs the 0 time span
     static wxTimeSpan Week() { return Weeks(1); }
 
         // default ctor constructs the 0 time span


@@ -991,10 +1122,10 @@ public:
         // from separate values for each component, date set to 0 (hours are
         // not restricted to 0..24 range, neither are minutes, seconds or
         // milliseconds)
         // from separate values for each component, date set to 0 (hours are
         // not restricted to 0..24 range, neither are minutes, seconds or
         // milliseconds)

-    inline wxTimeSpan(int hours,
-                      int minutes = 0,
-                      int seconds = 0,
-                      int milliseconds = 0);
+    inline wxTimeSpan(long hours,
+                      long minutes = 0,
+                      long seconds = 0,
+                      long milliseconds = 0);

 
         // default copy ctor is ok
 
 
         // default copy ctor is ok
 


@@ -1009,13 +1140,21 @@ public:
     inline wxTimeSpan& Add(const wxTimeSpan& diff);
         // add two timespans together
     wxTimeSpan& operator+=(const wxTimeSpan& diff) { return Add(diff); }
     inline wxTimeSpan& Add(const wxTimeSpan& diff);
         // add two timespans together
     wxTimeSpan& operator+=(const wxTimeSpan& diff) { return Add(diff); }

+    inline wxTimeSpan operator+(const wxTimeSpan& ts) const
+    {
+        return wxTimeSpan(GetValue() + ts.GetValue());
+    }

 
         // return the difference of two timespans
 
         // return the difference of two timespans

-    inline wxTimeSpan Substract(const wxTimeSpan& diff) const;
-        // substract another timespan
-    inline wxTimeSpan& Substract(const wxTimeSpan& diff);
-        // substract another timespan
-    wxTimeSpan& operator-=(const wxTimeSpan& diff) { return Substract(diff); }
+    inline wxTimeSpan Subtract(const wxTimeSpan& diff) const;
+        // subtract another timespan
+    inline wxTimeSpan& Subtract(const wxTimeSpan& diff);
+        // subtract another timespan
+    wxTimeSpan& operator-=(const wxTimeSpan& diff) { return Subtract(diff); }
+    inline wxTimeSpan operator-(const wxTimeSpan& ts)
+    {
+        return wxTimeSpan(GetValue() - ts.GetValue());
+    }

 
         // multiply timespan by a scalar
     inline wxTimeSpan Multiply(int n) const;
 
         // multiply timespan by a scalar
     inline wxTimeSpan Multiply(int n) const;


@@ -1023,8 +1162,12 @@ public:
     inline wxTimeSpan& Multiply(int n);
         // multiply timespan by a scalar
     wxTimeSpan& operator*=(int n) { return Multiply(n); }
     inline wxTimeSpan& Multiply(int n);
         // multiply timespan by a scalar
     wxTimeSpan& operator*=(int n) { return Multiply(n); }

+    inline wxTimeSpan operator*(int n) const
+    {
+        return wxTimeSpan(*this).Multiply(n);
+    }

 
 

-        // return this timespan with inversed sign
+        // return this timespan with opposite sign

     wxTimeSpan Negate() const { return wxTimeSpan(-GetValue()); }
         // negate the value of the timespan
     wxTimeSpan& Neg() { m_diff = -GetValue(); return *this; }
     wxTimeSpan Negate() const { return wxTimeSpan(-GetValue()); }
         // negate the value of the timespan
     wxTimeSpan& Neg() { m_diff = -GetValue(); return *this; }


@@ -1055,14 +1198,44 @@ public:
         // are two timespans equal?
     inline bool IsEqualTo(const wxTimeSpan& ts) const;
         // compare two timestamps: works with the absolute values, i.e. -2
         // are two timespans equal?
     inline bool IsEqualTo(const wxTimeSpan& ts) const;
         // compare two timestamps: works with the absolute values, i.e. -2

-        // hours is longer than 1 hour. Also, it will return FALSE if the
+        // hours is longer than 1 hour. Also, it will return false if the

         // timespans are equal in absolute value.
     inline bool IsLongerThan(const wxTimeSpan& ts) const;
         // compare two timestamps: works with the absolute values, i.e. 1
         // timespans are equal in absolute value.
     inline bool IsLongerThan(const wxTimeSpan& ts) const;
         // compare two timestamps: works with the absolute values, i.e. 1

-        // hour is shorter than -2 hours. Also, it will return FALSE if the
+        // hour is shorter than -2 hours. Also, it will return false if the

         // timespans are equal in absolute value.
     bool IsShorterThan(const wxTimeSpan& t) const { return !IsLongerThan(t); }
 
         // timespans are equal in absolute value.
     bool IsShorterThan(const wxTimeSpan& t) const { return !IsLongerThan(t); }
 

+    inline bool operator<(const wxTimeSpan &ts) const
+    {
+        return GetValue() < ts.GetValue();
+    }
+
+    inline bool operator<=(const wxTimeSpan &ts) const
+    {
+        return GetValue() <= ts.GetValue();
+    }
+
+    inline bool operator>(const wxTimeSpan &ts) const
+    {
+        return GetValue() > ts.GetValue();
+    }
+
+    inline bool operator>=(const wxTimeSpan &ts) const
+    {
+        return GetValue() >= ts.GetValue();
+    }
+
+    inline bool operator==(const wxTimeSpan &ts) const
+    {
+        return GetValue() == ts.GetValue();
+    }
+
+    inline bool operator!=(const wxTimeSpan &ts) const
+    {
+        return GetValue() != ts.GetValue();
+    }
+

     // breaking into days, hours, minutes and seconds
     // ------------------------------------------------------------------------
 
     // breaking into days, hours, minutes and seconds
     // ------------------------------------------------------------------------
 


@@ -1088,11 +1261,7 @@ public:
         // resulting text representation. Notice that only some of format
         // specifiers valid for wxDateTime are valid for wxTimeSpan: hours,
         // minutes and seconds make sense, but not "PM/AM" string for example.
         // resulting text representation. Notice that only some of format
         // specifiers valid for wxDateTime are valid for wxTimeSpan: hours,
         // minutes and seconds make sense, but not "PM/AM" string for example.

-    wxString Format(const wxChar *format = _T("%c")) const;
-        // preferred date representation for the current locale
-    wxString FormatDate() const { return Format(_T("%x")); }
-        // preferred time representation for the current locale
-    wxString FormatTime() const { return Format(_T("%X")); }
+    wxString Format(const wxChar *format = wxDefaultTimeSpanFormat) const;

 
     // implementation
     // ------------------------------------------------------------------------
 
     // implementation
     // ------------------------------------------------------------------------


@@ -1119,7 +1288,7 @@ private:
 // won't be changed unless the resulting date would be invalid: for example,
 // Jan 31 + 1 month will be Feb 28, not (non existing) Feb 31.
 //
 // won't be changed unless the resulting date would be invalid: for example,
 // Jan 31 + 1 month will be Feb 28, not (non existing) Feb 31.
 //

-// Because of this feature, adding and substracting back again the same
+// Because of this feature, adding and subtracting back again the same

 // wxDateSpan will *not*, in general give back the original date: Feb 28 - 1
 // month will be Jan 28, not Jan 31!
 //
 // wxDateSpan will *not*, in general give back the original date: Feb 28 - 1
 // month will be Jan 28, not Jan 31!
 //


@@ -1132,12 +1301,18 @@ private:
 // Beware about weeks: if you specify both weeks and days, the total number of
 // days added will be 7*weeks + days! See also GetTotalDays() function.
 //
 // Beware about weeks: if you specify both weeks and days, the total number of
 // days added will be 7*weeks + days! See also GetTotalDays() function.
 //

+// Equality operators are defined for wxDateSpans. Two datespans are equal if
+// they both give the same target date when added to *every* source date.
+// Thus wxDateSpan::Months(1) is not equal to wxDateSpan::Days(30), because
+// they not give the same date when added to 1 Feb. But wxDateSpan::Days(14) is
+// equal to wxDateSpan::Weeks(2)
+//

 // Finally, notice that for adding hours, minutes &c you don't need this
 // class: wxTimeSpan will do the job because there are no subtleties
 // associated with those.
 // ----------------------------------------------------------------------------
 
 // Finally, notice that for adding hours, minutes &c you don't need this
 // class: wxTimeSpan will do the job because there are no subtleties
 // associated with those.
 // ----------------------------------------------------------------------------
 

-class WXDLLEXPORT wxDateSpan
+class WXDLLIMPEXP_BASE wxDateSpan

 {
 public:
     // constructors
 {
 public:
     // constructors


@@ -1204,13 +1379,27 @@ public:
     inline wxDateSpan& Add(const wxDateSpan& other);
         // add another wxDateSpan to us
     inline wxDateSpan& operator+=(const wxDateSpan& other);
     inline wxDateSpan& Add(const wxDateSpan& other);
         // add another wxDateSpan to us
     inline wxDateSpan& operator+=(const wxDateSpan& other);

+    inline wxDateSpan operator+(const wxDateSpan& ds) const
+    {
+        return wxDateSpan(GetYears() + ds.GetYears(),
+                          GetMonths() + ds.GetMonths(),
+                          GetWeeks() + ds.GetWeeks(),
+                          GetDays() + ds.GetDays());
+    }

 
         // return difference of two date spans
 
         // return difference of two date spans

-    inline wxDateSpan Substract(const wxDateSpan& other) const;
-        // substract another wxDateSpan from us
-    inline wxDateSpan& Substract(const wxDateSpan& other);
-        // substract another wxDateSpan from us
+    inline wxDateSpan Subtract(const wxDateSpan& other) const;
+        // subtract another wxDateSpan from us
+    inline wxDateSpan& Subtract(const wxDateSpan& other);
+        // subtract another wxDateSpan from us

     inline wxDateSpan& operator-=(const wxDateSpan& other);
     inline wxDateSpan& operator-=(const wxDateSpan& other);

+    inline wxDateSpan operator-(const wxDateSpan& ds) const
+    {
+        return wxDateSpan(GetYears() - ds.GetYears(),
+                          GetMonths() - ds.GetMonths(),
+                          GetWeeks() - ds.GetWeeks(),
+                          GetDays() - ds.GetDays());
+    }

 
         // return a copy of this time span with changed sign
     inline wxDateSpan Negate() const;
 
         // return a copy of this time span with changed sign
     inline wxDateSpan Negate() const;


@@ -1225,6 +1414,23 @@ public:
     inline wxDateSpan& Multiply(int factor);
         // multiply all components by a (signed) number
     inline wxDateSpan& operator*=(int factor) { return Multiply(factor); }
     inline wxDateSpan& Multiply(int factor);
         // multiply all components by a (signed) number
     inline wxDateSpan& operator*=(int factor) { return Multiply(factor); }

+    inline wxDateSpan operator*(int n) const
+    {
+        return wxDateSpan(*this).Multiply(n);
+    }
+
+    // ds1 == d2 if and only if for every wxDateTime t t + ds1 == t + ds2
+    inline bool operator==(const wxDateSpan& ds) const
+    {
+        return GetYears() == ds.GetYears() &&
+               GetMonths() == ds.GetMonths() &&
+               GetTotalDays() == ds.GetTotalDays();
+    }
+
+    inline bool operator!=(const wxDateSpan& ds) const
+    {
+        return !(*this == ds);
+    }

 
 private:
     int m_years,
 
 private:
     int m_years,


@@ -1237,9 +1443,7 @@ private:
 // wxDateTimeArray: array of dates.
 // ----------------------------------------------------------------------------
 
 // wxDateTimeArray: array of dates.
 // ----------------------------------------------------------------------------
 

-#include "wx/dynarray.h"
-
-WX_DECLARE_OBJARRAY(wxDateTime, wxDateTimeArray);
+WX_DECLARE_USER_EXPORTED_OBJARRAY(wxDateTime, wxDateTimeArray, WXDLLIMPEXP_BASE);

 
 // ----------------------------------------------------------------------------
 // wxDateTimeHolidayAuthority: an object of this class will decide whether a
 
 // ----------------------------------------------------------------------------
 // wxDateTimeHolidayAuthority: an object of this class will decide whether a


@@ -1250,13 +1454,17 @@ WX_DECLARE_OBJARRAY(wxDateTime, wxDateTimeArray);
 //     virtual methods to work with the holidays they correspond to.
 // ----------------------------------------------------------------------------
 
 //     virtual methods to work with the holidays they correspond to.
 // ----------------------------------------------------------------------------
 

-class WXDLLEXPORT wxDateTimeHolidayAuthority;
-WX_DEFINE_ARRAY(wxDateTimeHolidayAuthority *, wxHolidayAuthoritiesArray);
+class WXDLLIMPEXP_BASE wxDateTimeHolidayAuthority;
+WX_DEFINE_USER_EXPORTED_ARRAY_PTR(wxDateTimeHolidayAuthority *,
+                              wxHolidayAuthoritiesArray,
+                              class WXDLLIMPEXP_BASE);

 
 

-class WXDLLEXPORT wxDateTimeHolidayAuthority
+class wxDateTimeHolidaysModule;
+class WXDLLIMPEXP_BASE wxDateTimeHolidayAuthority

 {
 {

+friend class wxDateTimeHolidaysModule;

 public:
 public:

-    // returns TRUE if the given date is a holiday
+    // returns true if the given date is a holiday

     static bool IsHoliday(const wxDateTime& dt);
 
     // fills the provided array with all holidays in the given range, returns
     static bool IsHoliday(const wxDateTime& dt);
 
     // fills the provided array with all holidays in the given range, returns


@@ -1272,6 +1480,9 @@ public:
     // wxDateTimeHolidayAuthority)
     static void AddAuthority(wxDateTimeHolidayAuthority *auth);
 
     // wxDateTimeHolidayAuthority)
     static void AddAuthority(wxDateTimeHolidayAuthority *auth);
 

+    // the base class must have a virtual dtor
+    virtual ~wxDateTimeHolidayAuthority();
+

 protected:
     // this function is called to determine whether a given day is a holiday
     virtual bool DoIsHoliday(const wxDateTime& dt) const = 0;
 protected:
     // this function is called to determine whether a given day is a holiday
     virtual bool DoIsHoliday(const wxDateTime& dt) const = 0;


@@ -1294,7 +1505,7 @@ private:
 };
 
 // the holidays for this class are all Saturdays and Sundays
 };
 
 // the holidays for this class are all Saturdays and Sundays

-class WXDLLEXPORT wxDateTimeWorkDays : public wxDateTimeHolidayAuthority
+class WXDLLIMPEXP_BASE wxDateTimeWorkDays : public wxDateTimeHolidayAuthority

 {
 protected:
     virtual bool DoIsHoliday(const wxDateTime& dt) const;
 {
 protected:
     virtual bool DoIsHoliday(const wxDateTime& dt) const;


@@ -1307,244 +1518,573 @@ protected:
 // inline functions implementation
 // ============================================================================
 
 // inline functions implementation
 // ============================================================================
 

-// don't include inline functions definitions when we're included from anything
-// else than datetime.cpp in debug builds: this minimizes rebuilds if we change
-// some inline function and the performance doesn't matter in the debug builds.
+// ----------------------------------------------------------------------------
+// private macros
+// ----------------------------------------------------------------------------
+
+#define MILLISECONDS_PER_DAY 86400000l

 
 

-#if !defined(__WXDEBUG__) || defined(wxDEFINE_TIME_CONSTANTS)
-    #define INCLUDED_FROM_WX_DATETIME_H
-        #include "wx/datetime.inl"
-    #undef INCLUDED_FROM_WX_DATETIME_H
+// some broken compilers (HP-UX CC) refuse to compile the "normal" version, but
+// using a temp variable always might prevent other compilers from optimising
+// it away - hence use of this ugly macro
+#ifndef __HPUX__
+    #define MODIFY_AND_RETURN(op) return wxDateTime(*this).op
+#else
+    #define MODIFY_AND_RETURN(op) wxDateTime dt(*this); dt.op; return dt

 #endif
 
 #endif
 

-// if we defined it to be empty above, restore it now
-#undef inline
+// ----------------------------------------------------------------------------
+// wxDateTime construction
+// ----------------------------------------------------------------------------
+
+inline bool wxDateTime::IsInStdRange() const
+{
+    return m_time >= 0l && (m_time / TIME_T_FACTOR) < LONG_MAX;
+}

 
 

-// ============================================================================
-// binary operators
-// ============================================================================
+/* static */
+inline wxDateTime wxDateTime::Now()
+{
+    return wxDateTime(*GetTmNow());
+}
+
+/* static */
+inline wxDateTime wxDateTime::Today()
+{
+    wxDateTime dt(Now());
+    dt.ResetTime();
+
+    return dt;
+}
+
+#if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400))
+inline wxDateTime& wxDateTime::Set(time_t timet)
+{
+    // assign first to avoid long multiplication overflow!
+    m_time = timet - WX_TIME_BASE_OFFSET ;
+    m_time *= TIME_T_FACTOR;
+
+    return *this;
+}
+#endif
+
+inline wxDateTime& wxDateTime::SetToCurrent()
+{
+    *this = Now();
+    return *this;
+}
+
+#if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400))
+inline wxDateTime::wxDateTime(time_t timet)
+{
+    Set(timet);
+}
+#endif
+
+inline wxDateTime::wxDateTime(const struct tm& tm)
+{
+    Set(tm);
+}
+
+inline wxDateTime::wxDateTime(const Tm& tm)
+{
+    Set(tm);
+}
+
+inline wxDateTime::wxDateTime(double jdn)
+{
+    Set(jdn);
+}
+
+inline wxDateTime& wxDateTime::Set(const Tm& tm)
+{
+    wxASSERT_MSG( tm.IsValid(), _T("invalid broken down date/time") );
+
+    return Set(tm.mday, (Month)tm.mon, tm.year,
+               tm.hour, tm.min, tm.sec, tm.msec);
+}
+
+inline wxDateTime::wxDateTime(wxDateTime_t hour,
+                              wxDateTime_t minute,
+                              wxDateTime_t second,
+                              wxDateTime_t millisec)
+{
+    Set(hour, minute, second, millisec);
+}
+
+inline wxDateTime::wxDateTime(wxDateTime_t day,
+                              Month        month,
+                              int          year,
+                              wxDateTime_t hour,
+                              wxDateTime_t minute,
+                              wxDateTime_t second,
+                              wxDateTime_t millisec)
+{
+    Set(day, month, year, hour, minute, second, millisec);
+}

 
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------

-// wxDateTime operators
+// wxDateTime accessors

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-// arithmetics
-// -----------
+inline wxLongLong wxDateTime::GetValue() const
+{
+    wxASSERT_MSG( IsValid(), _T("invalid wxDateTime"));

 
 

-// no need to check for validity - the member functions we call will do it
+    return m_time;
+}

 
 

-inline wxDateTime WXDLLEXPORT operator+(const wxDateTime& dt,
-                                        const wxTimeSpan& ts)
+inline time_t wxDateTime::GetTicks() const

 {
 {

-    return dt.Add(ts);
+    wxASSERT_MSG( IsValid(), _T("invalid wxDateTime"));
+    if ( !IsInStdRange() )
+    {
+        return (time_t)-1;
+    }
+
+    return (time_t)((m_time / (long)TIME_T_FACTOR).GetLo())+WX_TIME_BASE_OFFSET ;
+}
+
+inline bool wxDateTime::SetToLastWeekDay(WeekDay weekday,
+                                         Month month,
+                                         int year)
+{
+    return SetToWeekDay(weekday, -1, month, year);
+}
+
+inline wxDateTime
+wxDateTime::GetWeekDayInSameWeek(WeekDay weekday,
+                                 WeekFlags WXUNUSED(flags)) const
+{
+    MODIFY_AND_RETURN( SetToWeekDayInSameWeek(weekday) );

 }
 
 }
 

-inline wxDateTime WXDLLEXPORT operator-(const wxDateTime& dt,
-                                        const wxTimeSpan& ts)
+inline wxDateTime wxDateTime::GetNextWeekDay(WeekDay weekday) const

 {
 {

-    return dt.Substract(ts);
+    MODIFY_AND_RETURN( SetToNextWeekDay(weekday) );

 }
 
 }
 

-inline wxDateTime WXDLLEXPORT operator+(const wxDateTime& dt,
-                                        const wxDateSpan& ds)
+inline wxDateTime wxDateTime::GetPrevWeekDay(WeekDay weekday) const

 {
 {

-    return dt.Add(ds);
+    MODIFY_AND_RETURN( SetToPrevWeekDay(weekday) );

 }
 
 }
 

-inline wxDateTime WXDLLEXPORT operator-(const wxDateTime& dt,
-                                        const wxDateSpan& ds)
+inline wxDateTime wxDateTime::GetWeekDay(WeekDay weekday,
+                                         int n,
+                                         Month month,
+                                         int year) const

 {
 {

-    return dt.Substract(ds);
+    wxDateTime dt(*this);
+
+    return dt.SetToWeekDay(weekday, n, month, year) ? dt : wxInvalidDateTime;
+}
+
+inline wxDateTime wxDateTime::GetLastWeekDay(WeekDay weekday,
+                                             Month month,
+                                             int year)
+{
+    wxDateTime dt(*this);
+
+    return dt.SetToLastWeekDay(weekday, month, year) ? dt : wxInvalidDateTime;

 }
 
 }
 

-inline wxTimeSpan WXDLLEXPORT operator-(const wxDateTime& dt1,
-                                        const wxDateTime& dt2)
+inline wxDateTime wxDateTime::GetLastMonthDay(Month month, int year) const

 {
 {

-    return dt1.Substract(dt2);
+    MODIFY_AND_RETURN( SetToLastMonthDay(month, year) );

 }
 
 }
 

-// comparison
-// ----------
+inline wxDateTime wxDateTime::GetYearDay(wxDateTime_t yday) const
+{
+    MODIFY_AND_RETURN( SetToYearDay(yday) );
+}
+
+// ----------------------------------------------------------------------------
+// wxDateTime comparison
+// ----------------------------------------------------------------------------

 
 

-inline bool WXDLLEXPORT operator<(const wxDateTime& t1, const wxDateTime& t2)
+inline bool wxDateTime::IsEqualTo(const wxDateTime& datetime) const

 {
 {

-    wxASSERT_MSG( t1.IsValid() && t2.IsValid(), _T("invalid wxDateTime") );
+    wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime"));

 
 

-    return t1.GetValue() < t2.GetValue();
+    return m_time == datetime.m_time;

 }
 
 }
 

-inline bool WXDLLEXPORT operator<=(const wxDateTime& t1, const wxDateTime& t2)
+inline bool wxDateTime::IsEarlierThan(const wxDateTime& datetime) const

 {
 {

-    wxASSERT_MSG( t1.IsValid() && t2.IsValid(), _T("invalid wxDateTime") );
+    wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime"));

 
 

-    return t1.GetValue() <= t2.GetValue();
+    return m_time < datetime.m_time;

 }
 
 }
 

-inline bool WXDLLEXPORT operator>(const wxDateTime& t1, const wxDateTime& t2)
+inline bool wxDateTime::IsLaterThan(const wxDateTime& datetime) const

 {
 {

-    wxASSERT_MSG( t1.IsValid() && t2.IsValid(), _T("invalid wxDateTime") );
+    wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime"));

 
 

-    return t1.GetValue() > t2.GetValue();
+    return m_time > datetime.m_time;

 }
 
 }
 

-inline bool WXDLLEXPORT operator>=(const wxDateTime& t1, const wxDateTime& t2)
+inline bool wxDateTime::IsStrictlyBetween(const wxDateTime& t1,
+                                          const wxDateTime& t2) const

 {
 {

-    wxASSERT_MSG( t1.IsValid() && t2.IsValid(), _T("invalid wxDateTime") );
+    // no need for assert, will be checked by the functions we call
+    return IsLaterThan(t1) && IsEarlierThan(t2);
+}

 
 

-    return t1.GetValue() >= t2.GetValue();
+inline bool wxDateTime::IsBetween(const wxDateTime& t1,
+                                  const wxDateTime& t2) const
+{
+    // no need for assert, will be checked by the functions we call
+    return IsEqualTo(t1) || IsEqualTo(t2) || IsStrictlyBetween(t1, t2);

 }
 
 }
 

-inline bool WXDLLEXPORT operator==(const wxDateTime& t1, const wxDateTime& t2)
+inline bool wxDateTime::IsSameDate(const wxDateTime& dt) const

 {
 {

-    wxASSERT_MSG( t1.IsValid() && t2.IsValid(), _T("invalid wxDateTime") );
+    Tm tm1 = GetTm(),
+       tm2 = dt.GetTm();

 
 

-    return t1.GetValue() == t2.GetValue();
+    return tm1.year == tm2.year &&
+           tm1.mon == tm2.mon &&
+           tm1.mday == tm2.mday;

 }
 
 }
 

-inline bool WXDLLEXPORT operator!=(const wxDateTime& t1, const wxDateTime& t2)
+inline bool wxDateTime::IsSameTime(const wxDateTime& dt) const

 {
 {

-    wxASSERT_MSG( t1.IsValid() && t2.IsValid(), _T("invalid wxDateTime") );
+    // notice that we can't do something like this:
+    //
+    //    m_time % MILLISECONDS_PER_DAY == dt.m_time % MILLISECONDS_PER_DAY
+    //
+    // because we have also to deal with (possibly) different DST settings!
+    Tm tm1 = GetTm(),
+       tm2 = dt.GetTm();
+
+    return tm1.hour == tm2.hour &&
+           tm1.min == tm2.min &&
+           tm1.sec == tm2.sec &&
+           tm1.msec == tm2.msec;
+}

 
 

-    return t1.GetValue() != t2.GetValue();
+inline bool wxDateTime::IsEqualUpTo(const wxDateTime& dt,
+                                    const wxTimeSpan& ts) const
+{
+    return IsBetween(dt.Subtract(ts), dt.Add(ts));

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------

-// wxTimeSpan operators
+// wxDateTime arithmetics

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-// arithmetics
-// -----------
+inline wxDateTime wxDateTime::Add(const wxTimeSpan& diff) const
+{
+    wxASSERT_MSG( IsValid(), _T("invalid wxDateTime"));
+
+    return wxDateTime(m_time + diff.GetValue());
+}
+
+inline wxDateTime& wxDateTime::Add(const wxTimeSpan& diff)
+{
+    wxASSERT_MSG( IsValid(), _T("invalid wxDateTime"));
+
+    m_time += diff.GetValue();
+
+    return *this;
+}
+
+inline wxDateTime& wxDateTime::operator+=(const wxTimeSpan& diff)
+{
+    return Add(diff);
+}
+
+inline wxDateTime wxDateTime::Subtract(const wxTimeSpan& diff) const
+{
+    wxASSERT_MSG( IsValid(), _T("invalid wxDateTime"));
+
+    return wxDateTime(m_time - diff.GetValue());
+}

 
 

-inline wxTimeSpan WXDLLEXPORT operator+(const wxTimeSpan& ts1,
-                                        const wxTimeSpan& ts2)
+inline wxDateTime& wxDateTime::Subtract(const wxTimeSpan& diff)

 {
 {

-    return wxTimeSpan(ts1.GetValue() + ts2.GetValue());
+    wxASSERT_MSG( IsValid(), _T("invalid wxDateTime"));
+
+    m_time -= diff.GetValue();
+
+    return *this;

 }
 
 }
 

-inline wxTimeSpan WXDLLEXPORT operator-(const wxTimeSpan& ts1,
-                                        const wxTimeSpan& ts2)
+inline wxDateTime& wxDateTime::operator-=(const wxTimeSpan& diff)

 {
 {

-    return wxTimeSpan(ts1.GetValue() - ts2.GetValue());
+    return Subtract(diff);

 }
 
 }
 

-inline wxTimeSpan WXDLLEXPORT operator*(const wxTimeSpan& ts, int n)
+inline wxTimeSpan wxDateTime::Subtract(const wxDateTime& datetime) const

 {
 {

-    return wxTimeSpan(ts).Multiply(n);
+    wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime"));
+
+    return wxTimeSpan(GetValue() - datetime.GetValue());

 }
 
 }
 

-inline wxTimeSpan WXDLLEXPORT operator*(int n, const wxTimeSpan& ts)
+inline wxTimeSpan wxDateTime::operator-(const wxDateTime& dt2) const

 {
 {

-    return wxTimeSpan(ts).Multiply(n);
+    return this->Subtract(dt2);

 }
 
 }
 

-// comparison
-// ----------
+inline wxDateTime wxDateTime::Add(const wxDateSpan& diff) const
+{
+    return wxDateTime(*this).Add(diff);
+}

 
 

-inline bool WXDLLEXPORT operator<(const wxTimeSpan &t1, const wxTimeSpan &t2)
+inline wxDateTime& wxDateTime::Subtract(const wxDateSpan& diff)

 {
 {

-    return t1.GetValue() < t2.GetValue();
+    return Add(diff.Negate());

 }
 
 }
 

-inline bool WXDLLEXPORT operator<=(const wxTimeSpan &t1, const wxTimeSpan &t2)
+inline wxDateTime wxDateTime::Subtract(const wxDateSpan& diff) const

 {
 {

-    return t1.GetValue() <= t2.GetValue();
+    return wxDateTime(*this).Subtract(diff);

 }
 
 }
 

-inline bool WXDLLEXPORT operator>(const wxTimeSpan &t1, const wxTimeSpan &t2)
+inline wxDateTime& wxDateTime::operator-=(const wxDateSpan& diff)

 {
 {

-    return t1.GetValue() > t2.GetValue();
+    return Subtract(diff);

 }
 
 }
 

-inline bool WXDLLEXPORT operator>=(const wxTimeSpan &t1, const wxTimeSpan &t2)
+inline wxDateTime& wxDateTime::operator+=(const wxDateSpan& diff)

 {
 {

-    return t1.GetValue() >= t2.GetValue();
+    return Add(diff);

 }
 
 }
 

-inline bool WXDLLEXPORT operator==(const wxTimeSpan &t1, const wxTimeSpan &t2)
+// ----------------------------------------------------------------------------
+// wxDateTime and timezones
+// ----------------------------------------------------------------------------
+
+inline wxDateTime
+wxDateTime::ToTimezone(const wxDateTime::TimeZone& tz, bool noDST) const

 {
 {

-    return t1.GetValue() == t2.GetValue();
+    MODIFY_AND_RETURN( MakeTimezone(tz, noDST) );

 }
 
 }
 

-inline bool WXDLLEXPORT operator!=(const wxTimeSpan &t1, const wxTimeSpan &t2)
+#if wxABI_VERSION >= 20602
+
+inline wxDateTime
+wxDateTime::FromTimezone(const wxDateTime::TimeZone& tz, bool noDST) const

 {
 {

-    return t1.GetValue() != t2.GetValue();
+    MODIFY_AND_RETURN( MakeFromTimezone(tz, noDST) );

 }
 
 }
 

+#endif // ABI >= 2.6.2
+

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-// wxDateSpan
+// wxTimeSpan construction

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-// arithmetics
-// -----------
+inline wxTimeSpan::wxTimeSpan(long hours,
+                              long minutes,
+                              long seconds,
+                              long milliseconds)
+{
+    // assign first to avoid precision loss
+    m_diff = hours;
+    m_diff *= 60l;
+    m_diff += minutes;
+    m_diff *= 60l;
+    m_diff += seconds;
+    m_diff *= 1000l;
+    m_diff += milliseconds;
+}
+
+// ----------------------------------------------------------------------------
+// wxTimeSpan accessors
+// ----------------------------------------------------------------------------

 
 

-inline WXDLLEXPORT wxDateSpan operator+(const wxDateSpan& ds1,
-                                        const wxDateSpan& ds2)
+inline wxLongLong wxTimeSpan::GetSeconds() const

 {
 {

-    return wxDateSpan(ds1.GetYears() + ds2.GetYears(),
-                      ds1.GetMonths() + ds2.GetMonths(),
-                      ds1.GetWeeks() + ds2.GetWeeks(),
-                      ds1.GetDays() + ds2.GetDays());
+    return m_diff / 1000l;

 }
 
 }
 

-inline WXDLLEXPORT wxDateSpan operator-(const wxDateSpan& ds1,
-                                        const wxDateSpan& ds2)
+inline int wxTimeSpan::GetMinutes() const

 {
 {

-    return wxDateSpan(ds1.GetYears() - ds2.GetYears(),
-                      ds1.GetMonths() - ds2.GetMonths(),
-                      ds1.GetWeeks() - ds2.GetWeeks(),
-                      ds1.GetDays() - ds2.GetDays());
+    return (GetSeconds() / 60l).GetLo();

 }
 
 }
 

-inline WXDLLEXPORT wxDateSpan operator*(const wxDateSpan& ds, int n)
+inline int wxTimeSpan::GetHours() const

 {
 {

-    return wxDateSpan(ds).Multiply(n);
+    return GetMinutes() / 60;

 }
 
 }
 

-inline WXDLLEXPORT wxDateSpan operator*(int n, const wxDateSpan& ds)
+inline int wxTimeSpan::GetDays() const

 {
 {

-    return wxDateSpan(ds).Multiply(n);
+    return GetHours() / 24;

 }
 
 }
 

-// ============================================================================
-// other helper functions
-// ============================================================================
+inline int wxTimeSpan::GetWeeks() const
+{
+    return GetDays() / 7;
+}

 
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------

-// iteration helpers: can be used to write a for loop over enum variable like
-// this:
-//  for ( m = wxDateTime::Jan; m < wxDateTime::Inv_Month; wxNextMonth(m) )
+// wxTimeSpan arithmetics
+// ----------------------------------------------------------------------------
+
+inline wxTimeSpan wxTimeSpan::Add(const wxTimeSpan& diff) const
+{
+    return wxTimeSpan(m_diff + diff.GetValue());
+}
+
+inline wxTimeSpan& wxTimeSpan::Add(const wxTimeSpan& diff)
+{
+    m_diff += diff.GetValue();
+
+    return *this;
+}
+
+inline wxTimeSpan wxTimeSpan::Subtract(const wxTimeSpan& diff) const
+{
+    return wxTimeSpan(m_diff - diff.GetValue());
+}
+
+inline wxTimeSpan& wxTimeSpan::Subtract(const wxTimeSpan& diff)
+{
+    m_diff -= diff.GetValue();
+
+    return *this;
+}
+
+inline wxTimeSpan& wxTimeSpan::Multiply(int n)
+{
+    m_diff *= (long)n;
+
+    return *this;
+}
+
+inline wxTimeSpan wxTimeSpan::Multiply(int n) const
+{
+    return wxTimeSpan(m_diff * (long)n);
+}
+
+inline wxTimeSpan wxTimeSpan::Abs() const
+{
+    return wxTimeSpan(GetValue().Abs());
+}
+
+inline bool wxTimeSpan::IsEqualTo(const wxTimeSpan& ts) const
+{
+    return GetValue() == ts.GetValue();
+}
+
+inline bool wxTimeSpan::IsLongerThan(const wxTimeSpan& ts) const
+{
+    return GetValue().Abs() > ts.GetValue().Abs();
+}
+
+// ----------------------------------------------------------------------------
+// wxDateSpan

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-inline WXDLLEXPORT void wxNextMonth(wxDateTime::Month& m)
+inline wxDateSpan& wxDateSpan::operator+=(const wxDateSpan& other)
+{
+    m_years += other.m_years;
+    m_months += other.m_months;
+    m_weeks += other.m_weeks;
+    m_days += other.m_days;
+
+    return *this;
+}
+
+inline wxDateSpan& wxDateSpan::Add(const wxDateSpan& other)
+{
+    return *this += other;
+}
+
+inline wxDateSpan wxDateSpan::Add(const wxDateSpan& other) const
+{
+    wxDateSpan ds(*this);
+    ds.Add(other);
+    return ds;
+}
+
+inline wxDateSpan& wxDateSpan::Multiply(int factor)

 {
 {

-    wxASSERT_MSG( m < wxDateTime::Inv_Month, _T("invalid month") );
+    m_years *= factor;
+    m_months *= factor;
+    m_weeks *= factor;
+    m_days *= factor;

 
 

-    // no wrapping or the for loop above would never end!
-    m = (wxDateTime::Month)(m + 1);
+    return *this;

 }
 
 }
 

-inline WXDLLEXPORT void wxPrevMonth(wxDateTime::Month& m)
+inline wxDateSpan wxDateSpan::Multiply(int factor) const

 {
 {

-    wxASSERT_MSG( m < wxDateTime::Inv_Month, _T("invalid month") );
+    wxDateSpan ds(*this);
+    ds.Multiply(factor);
+    return ds;
+}

 
 

-    m = m == wxDateTime::Jan ? wxDateTime::Inv_Month
-                             : (wxDateTime::Month)(m - 1);
+inline wxDateSpan wxDateSpan::Negate() const
+{
+    return wxDateSpan(-m_years, -m_months, -m_weeks, -m_days);

 }
 
 }
 

-inline WXDLLEXPORT void wxNextWDay(wxDateTime::WeekDay& wd)
+inline wxDateSpan& wxDateSpan::Neg()

 {
 {

-    wxASSERT_MSG( wd < wxDateTime::Inv_WeekDay, _T("invalid week day") );
+    m_years = -m_years;
+    m_months = -m_months;
+    m_weeks = -m_weeks;
+    m_days = -m_days;

 
 

-    // no wrapping or the for loop above would never end!
-    wd = (wxDateTime::WeekDay)(wd + 1);
+    return *this;

 }
 
 }
 

-inline WXDLLEXPORT void wxPrevWDay(wxDateTime::WeekDay& wd)
+inline wxDateSpan& wxDateSpan::operator-=(const wxDateSpan& other)

 {
 {

-    wxASSERT_MSG( wd < wxDateTime::Inv_WeekDay, _T("invalid week day") );
+    return *this += other.Negate();
+}

 
 

-    wd = wd == wxDateTime::Sun ? wxDateTime::Inv_WeekDay
-                               : (wxDateTime::WeekDay)(wd - 1);
+inline wxDateSpan& wxDateSpan::Subtract(const wxDateSpan& other)
+{
+    return *this -= other;

 }
 
 }
 

+inline wxDateSpan wxDateSpan::Subtract(const wxDateSpan& other) const
+{
+    wxDateSpan ds(*this);
+    ds.Subtract(other);
+    return ds;
+}
+
+#undef MILLISECONDS_PER_DAY
+
+#undef MODIFY_AND_RETURN
+
+// ============================================================================
+// binary operators
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxTimeSpan operators
+// ----------------------------------------------------------------------------
+
+wxTimeSpan WXDLLIMPEXP_BASE operator*(int n, const wxTimeSpan& ts);
+
+// ----------------------------------------------------------------------------
+// wxDateSpan
+// ----------------------------------------------------------------------------
+
+wxDateSpan WXDLLIMPEXP_BASE operator*(int n, const wxDateSpan& ds);
+
+// ============================================================================
+// other helper functions
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// iteration helpers: can be used to write a for loop over enum variable like
+// this:
+//  for ( m = wxDateTime::Jan; m < wxDateTime::Inv_Month; wxNextMonth(m) )
+// ----------------------------------------------------------------------------
+
+WXDLLIMPEXP_BASE void wxNextMonth(wxDateTime::Month& m);
+WXDLLIMPEXP_BASE void wxPrevMonth(wxDateTime::Month& m);
+WXDLLIMPEXP_BASE void wxNextWDay(wxDateTime::WeekDay& wd);
+WXDLLIMPEXP_BASE void wxPrevWDay(wxDateTime::WeekDay& wd);
+
+#endif // wxUSE_DATETIME
+

 #endif // _WX_DATETIME_H
 #endif // _WX_DATETIME_H