assert that wxRound() argument is in the supported range

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

diff --git a/include/wx/datetime.h b/include/wx/datetime.h
index c5cc70082697f5bf7dec8344faa4ec598274fe76..281fe06575eb5f8dc6f9af98258657b56b180a77 100644 (file)
--- a/include/wx/datetime.h
+++ b/include/wx/datetime.h
@@ -13,15 +13,16 @@
 #ifndef _WX_DATETIME_H
 #define _WX_DATETIME_H
 
 #ifndef _WX_DATETIME_H
 #define _WX_DATETIME_H
 

-#if defined(__GNUG__) && !defined(__APPLE__)
-    #pragma interface "datetime.h"
-#endif
-

 #include "wx/defs.h"
 
 #if wxUSE_DATETIME
 
 #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"


@@ -30,21 +31,7 @@ class WXDLLIMPEXP_BASE wxDateTime;
 class WXDLLIMPEXP_BASE wxTimeSpan;
 class WXDLLIMPEXP_BASE wxDateSpan;
 
 class WXDLLIMPEXP_BASE wxTimeSpan;
 class WXDLLIMPEXP_BASE wxDateSpan;
 

-// a hack: 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)
-
-// For Mingw32, causes a link error. (VZ: why?)
-#if defined( __WXDEBUG__) && !defined(__MINGW32__) && !(defined(_MSC_VER) && wxUSE_ACCESSIBILITY)
-    #define wxDATETIME_DONT_INLINE
-
-    #undef inline
-    #define inline
-#else
-    // just in case
-    #undef wxDATETIME_DONT_INLINE
-#endif // Debug
+#include "wx/dynarray.h"

 
 // 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
 
 // 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


@@ -65,6 +52,27 @@ class WXDLLIMPEXP_BASE wxDateSpan;
  *   5. wxDateTimeHolidayAuthority for Easter and other christian feasts
  */
 
  *   5. wxDateTimeHolidayAuthority for Easter and other christian feasts
  */
 

+/* Two wrapper functions for thread safety */
+#ifdef HAVE_LOCALTIME_R
+#define wxLocaltime_r localtime_r
+#else
+WXDLLIMPEXP_BASE struct tm *wxLocaltime_r(const time_t*, struct tm*);
+#if wxUSE_THREADS && !defined(__WINDOWS__) && !defined(__WATCOMC__)
+     // On Windows, localtime _is_ threadsafe!
+#warning using pseudo thread-safe wrapper for localtime to emulate localtime_r
+#endif
+#endif
+
+#ifdef HAVE_GMTIME_R
+#define wxGmtime_r gmtime_r
+#else
+WXDLLIMPEXP_BASE struct tm *wxGmtime_r(const time_t*, struct tm*);
+#if wxUSE_THREADS && !defined(__WINDOWS__) && !defined(__WATCOMC__)
+     // On Windows, gmtime _is_ threadsafe!
+#warning using pseudo thread-safe wrapper for gmtime to emulate gmtime_r
+#endif
+#endif
+

 /*
   The three (main) classes declared in this header represent:
 
 /*
   The three (main) classes declared in this header represent:
 


@@ -119,7 +127,10 @@ class WXDLLIMPEXP_BASE wxDateSpan;
 // wxInvalidDateTime)
 class WXDLLIMPEXP_BASE wxDateTime;
 
 // wxInvalidDateTime)
 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;
 extern WXDLLIMPEXP_DATA_BASE(const wxDateTime) wxDefaultDateTime;

+

 #define wxInvalidDateTime wxDefaultDateTime
 
 // ----------------------------------------------------------------------------
 #define wxInvalidDateTime wxDefaultDateTime
 
 // ----------------------------------------------------------------------------


@@ -157,7 +168,7 @@ public:
         GMT_6, GMT_5, GMT_4, GMT_3, GMT_2, GMT_1,
         GMT0,
         GMT1, GMT2, GMT3, GMT4, GMT5, GMT6,
         GMT_6, GMT_5, GMT_4, GMT_3, GMT_2, GMT_1,
         GMT0,
         GMT1, GMT2, GMT3, GMT4, GMT5, GMT6,

-        GMT7, GMT8, GMT9, GMT10, GMT11, GMT12,
+        GMT7, GMT8, GMT9, GMT10, GMT11, GMT12, GMT13,

         // Note that GMT12 and GMT_12 are not the same: there is a difference
         // of exactly one day between them
 
         // Note that GMT12 and GMT_12 are not the same: there is a difference
         // of exactly one day between them
 


@@ -191,10 +202,14 @@ public:
         // Australia
 
         A_WST = GMT8,                       // Western Standard Time
         // Australia
 
         A_WST = GMT8,                       // Western Standard Time

-        A_CST = GMT12 + 1,                  // Central Standard Time (+9.5)
+        A_CST = GMT13 + 1,                  // Central Standard Time (+9.5)

         A_EST = GMT10,                      // Eastern Standard Time
         A_ESST = GMT11,                     // Eastern Summer Time
 
         A_EST = GMT10,                      // Eastern Standard Time
         A_ESST = GMT11,                     // Eastern Summer Time
 

+        // New Zealand
+        NZST = GMT12,                       // Standard Time
+        NZDT = GMT13,                       // Daylight Saving Time
+

         // TODO add more symbolic timezone names here
 
         // Universal Coordinated Time = the new and politically correct name
         // TODO add more symbolic timezone names here
 
         // Universal Coordinated Time = the new and politically correct name


@@ -337,6 +352,12 @@ 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


@@ -356,10 +377,8 @@ 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
     {


@@ -468,7 +487,7 @@ 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);
 


@@ -484,11 +503,11 @@ 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)

-    static int GetCentury(int year = Inv_Year);
+    static int GetCentury(int year);

 
         // returns the number of days in this year (356 or 355 for Gregorian
         // calendar usually :-)
 
         // returns the number of days in this year (356 or 355 for Gregorian
         // calendar usually :-)


@@ -513,7 +532,7 @@ 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);
 


@@ -545,7 +564,7 @@ public:
     // ------------------------------------------------------------------------
 
         // default ctor does not initialize the object, use Set()!
     // ------------------------------------------------------------------------
 
         // default ctor does not initialize the object, use Set()!

-    wxDateTime() { m_time = wxLongLong((long)ULONG_MAX, ULONG_MAX); }
+    wxDateTime() { m_time = wxLongLong(wxINT32_MIN, 0); }

 
         // from time_t: seconds since the Epoch 00:00:00 UTC, Jan 1, 1970)
 #if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400))
 
         // from time_t: seconds since the Epoch 00:00:00 UTC, Jan 1, 1970)
 #if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400))


@@ -620,6 +639,10 @@ public:
         // resets time to 00:00:00, doesn't change the date
     wxDateTime& ResetTime();
 
         // resets time to 00:00:00, doesn't change the date
     wxDateTime& ResetTime();
 

+        // get the date part of this object only, i.e. the object which has the
+        // same date as this one but time of 00:00:00
+    wxDateTime GetDateOnly() const;
+

         // the following functions don't change the values of the other
         // fields, i.e. SetMinute() won't change either hour or seconds value
 
         // the following functions don't change the values of the other
         // fields, i.e. SetMinute() won't change either hour or seconds value
 


@@ -669,7 +692,7 @@ 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,


@@ -689,15 +712,26 @@ public:
                                      Month month = Inv_Month,
                                      int year = Inv_Year);
 
                                      Month month = Inv_Month,
                                      int year = Inv_Year);
 

+#if WXWIN_COMPATIBILITY_2_6

         // sets the date to the given day of the given week in the 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,
-                      WeekFlags flags = Monday_First);
-    inline wxDateTime GetWeek(wxDateTime_t numWeek,
-                              WeekDay weekday = Mon,
-                              WeekFlags flags = Monday_First) 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 );
+#endif // WXWIN_COMPATIBILITY_2_6
+
+        // 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


@@ -750,26 +784,38 @@ 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);
+    inline wxDateTime ToTimezone(const TimeZone& tz, bool noDST = false) const;
+    wxDateTime& MakeTimezone(const TimeZone& tz, bool noDST = false);
+
+        // 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);
+
+        // transform to/from GMT/UTC
+    wxDateTime ToUTC(bool noDST = false) const { return ToTimezone(UTC, noDST); }
+    wxDateTime& MakeUTC(bool noDST = false) { return MakeTimezone(UTC, noDST); }

 
 

-        // transform to GMT/UTC
-    wxDateTime ToGMT(bool noDST = FALSE) const { return ToTimezone(GMT0, noDST); }
-    wxDateTime& MakeGMT(bool noDST = FALSE) { return MakeTimezone(GMT0, noDST); }
+    wxDateTime ToGMT(bool noDST = false) const { return ToUTC(noDST); }
+    wxDateTime& MakeGMT(bool noDST = false) { return MakeUTC(noDST); }
+
+    wxDateTime FromUTC(bool noDST = false) const
+        { return FromTimezone(UTC, noDST); }
+    wxDateTime& MakeFromUTC(bool noDST = false)
+        { return MakeFromTimezone(UTC, noDST); }

 
         // 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?


@@ -778,6 +824,7 @@ 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


@@ -799,6 +846,9 @@ public:
         // if the value is out of range
     inline time_t GetTicks() const;
 
         // if the value is out of range
     inline time_t GetTicks() const;
 

+        // get the century, same as GetCentury(GetYear())
+    int GetCentury(const TimeZone& tz = Local) const
+            { return GetCentury(GetYear(tz)); }

         // get the year (returns Inv_Year if date is invalid)
     int GetYear(const TimeZone& tz = Local) const
             { return GetTm(tz).year; }
         // get the year (returns Inv_Year if date is invalid)
     int GetYear(const TimeZone& tz = Local) const
             { return GetTm(tz).year; }


@@ -859,20 +909,20 @@ public:
     // 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?


@@ -884,6 +934,42 @@ 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)
     // ------------------------------------------------------------------------
 


@@ -893,6 +979,12 @@ 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
     inline wxDateTime Subtract(const wxTimeSpan& diff) const;
 
         // return the difference of the date with a time span
     inline wxDateTime Subtract(const wxTimeSpan& diff) const;


@@ -900,6 +992,12 @@ public:
     inline wxDateTime& Subtract(const wxTimeSpan& diff);
         // subtract a time span (positive or negative)
     inline wxDateTime& operator-=(const wxTimeSpan& diff);
     inline wxDateTime& Subtract(const wxTimeSpan& diff);
         // subtract a time span (positive or negative)
     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;


@@ -907,6 +1005,12 @@ 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
     inline wxDateTime Subtract(const wxDateSpan& diff) const;
 
         // return the difference of the date with a date span
     inline wxDateTime Subtract(const wxDateSpan& diff) const;


@@ -914,9 +1018,16 @@ public:
     inline wxDateTime& Subtract(const wxDateSpan& diff);
         // subtract a date span (positive or negative)
     inline wxDateTime& operator-=(const wxDateSpan& diff);
     inline wxDateTime& Subtract(const wxDateSpan& diff);
         // subtract a date span (positive or negative)
     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
     inline wxTimeSpan Subtract(const wxDateTime& dt) const;
 
         // return the difference between two dates
     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


@@ -931,7 +1042,7 @@ 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


@@ -946,7 +1057,7 @@ 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")); }


@@ -978,6 +1089,9 @@ public:
         return localtime(&t);
     }
 
         return localtime(&t);
     }
 

+    // get current time using thread-safe function
+    static struct tm *GetTmNow(struct tm *tmstruct);
+

 private:
     // the current country - as it's the same for all program objects (unless
     // it runs on a _really_ big cluster system :-), this is a static member:
 private:
     // the current country - as it's the same for all program objects (unless
     // it runs on a _really_ big cluster system :-), this is a static member:


@@ -989,7 +1103,7 @@ 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;
 


@@ -1011,8 +1125,12 @@ public:
     // constructors
     // ------------------------------------------------------------------------
 
     // constructors
     // ------------------------------------------------------------------------
 

+        // return the timespan for the given number of milliseconds
+    static wxTimeSpan Milliseconds(wxLongLong ms) { return wxTimeSpan(0, 0, 0, ms); }
+    static wxTimeSpan Millisecond() { return Milliseconds(1); }
+

         // return the timespan for the given number of seconds
         // return the timespan for the given number of seconds

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


@@ -1039,8 +1157,8 @@ public:
         // milliseconds)
     inline wxTimeSpan(long hours,
                       long minutes = 0,
         // milliseconds)
     inline wxTimeSpan(long hours,
                       long minutes = 0,

-                      long seconds = 0,
-                      long milliseconds = 0);
+                      wxLongLong seconds = 0,
+                      wxLongLong milliseconds = 0);

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


@@ -1055,6 +1173,10 @@ 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
     inline wxTimeSpan Subtract(const wxTimeSpan& diff) const;
 
         // return the difference of two timespans
     inline wxTimeSpan Subtract(const wxTimeSpan& diff) const;


@@ -1062,6 +1184,10 @@ public:
     inline wxTimeSpan& Subtract(const wxTimeSpan& diff);
         // subtract another timespan
     wxTimeSpan& operator-=(const wxTimeSpan& diff) { return Subtract(diff); }
     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;


@@ -1069,8 +1195,12 @@ 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; }


@@ -1101,14 +1231,44 @@ 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
     // ------------------------------------------------------------------------
 


@@ -1134,7 +1294,7 @@ 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("%H:%M:%S")) const;
+    wxString Format(const wxChar *format = wxDefaultTimeSpanFormat) const;

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


@@ -1252,6 +1412,13 @@ 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
     inline wxDateSpan Subtract(const wxDateSpan& other) const;
 
         // return difference of two date spans
     inline wxDateSpan Subtract(const wxDateSpan& other) const;


@@ -1259,6 +1426,13 @@ public:
     inline wxDateSpan& Subtract(const wxDateSpan& other);
         // subtract another wxDateSpan from us
     inline wxDateSpan& operator-=(const wxDateSpan& other);
     inline wxDateSpan& Subtract(const wxDateSpan& other);
         // subtract another wxDateSpan from 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 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;


@@ -1273,6 +1447,23 @@ 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,


@@ -1285,8 +1476,6 @@ private:
 // wxDateTimeArray: array of dates.
 // ----------------------------------------------------------------------------
 
 // wxDateTimeArray: array of dates.
 // ----------------------------------------------------------------------------
 

-#include "wx/dynarray.h"
-

 WX_DECLARE_USER_EXPORTED_OBJARRAY(wxDateTime, wxDateTimeArray, WXDLLIMPEXP_BASE);
 
 // ----------------------------------------------------------------------------
 WX_DECLARE_USER_EXPORTED_OBJARRAY(wxDateTime, wxDateTimeArray, WXDLLIMPEXP_BASE);
 
 // ----------------------------------------------------------------------------


@@ -1299,7 +1488,7 @@ WX_DECLARE_USER_EXPORTED_OBJARRAY(wxDateTime, wxDateTimeArray, WXDLLIMPEXP_BASE)
 // ----------------------------------------------------------------------------
 
 class WXDLLIMPEXP_BASE wxDateTimeHolidayAuthority;
 // ----------------------------------------------------------------------------
 
 class WXDLLIMPEXP_BASE wxDateTimeHolidayAuthority;

-WX_DEFINE_USER_EXPORTED_ARRAY(wxDateTimeHolidayAuthority *,
+WX_DEFINE_USER_EXPORTED_ARRAY_PTR(wxDateTimeHolidayAuthority *,

                               wxHolidayAuthoritiesArray,
                               class WXDLLIMPEXP_BASE);
 
                               wxHolidayAuthoritiesArray,
                               class WXDLLIMPEXP_BASE);
 


@@ -1308,7 +1497,7 @@ class WXDLLIMPEXP_BASE wxDateTimeHolidayAuthority
 {
 friend class wxDateTimeHolidaysModule;
 public:
 {
 friend class wxDateTimeHolidaysModule;
 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


@@ -1362,266 +1551,572 @@ 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(wxDATETIME_DONT_INLINE) || 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
-#ifdef wxDATETIME_DONT_INLINE
-    #undef inline
+// ----------------------------------------------------------------------------
+// wxDateTime construction
+// ----------------------------------------------------------------------------
+
+inline bool wxDateTime::IsInStdRange() const
+{
+    return m_time >= 0l && (m_time / TIME_T_FACTOR) < LONG_MAX;
+}
+
+/* static */
+inline wxDateTime wxDateTime::Now()
+{
+    struct tm tmstruct;
+    return wxDateTime(*GetTmNow(&tmstruct));
+}
+
+/* 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
 
 #endif
 

-// ============================================================================
-// binary operators
-// ============================================================================
+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"));
+
+    return m_time;
+}
+
+inline time_t wxDateTime::GetTicks() const
+{
+    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) );
+}

 
 

-// no need to check for validity - the member functions we call will do it
+inline wxDateTime wxDateTime::GetNextWeekDay(WeekDay weekday) const
+{
+    MODIFY_AND_RETURN( SetToNextWeekDay(weekday) );
+}

 
 

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

 {
 {

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

 }
 
 }
 

-inline wxDateTime WXDLLIMPEXP_BASE operator-(const wxDateTime& dt,
-                                        const wxTimeSpan& ts)
+inline wxDateTime wxDateTime::GetWeekDay(WeekDay weekday,
+                                         int n,
+                                         Month month,
+                                         int year) const

 {
 {

-    return dt.Subtract(ts);
+    wxDateTime dt(*this);
+
+    return dt.SetToWeekDay(weekday, n, month, year) ? dt : wxInvalidDateTime;

 }
 
 }
 

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

 {
 {

-    return dt.Add(ds);
+    wxDateTime dt(*this);
+
+    return dt.SetToLastWeekDay(weekday, month, year) ? dt : wxInvalidDateTime;

 }
 
 }
 

-inline wxDateTime WXDLLIMPEXP_BASE operator-(const wxDateTime& dt,
-                                        const wxDateSpan& ds)
+inline wxDateTime wxDateTime::GetLastMonthDay(Month month, int year) const

 {
 {

-    return dt.Subtract(ds);
+    MODIFY_AND_RETURN( SetToLastMonthDay(month, year) );

 }
 
 }
 

-inline wxTimeSpan WXDLLIMPEXP_BASE operator-(const wxDateTime& dt1,
-                                        const wxDateTime& dt2)
+inline wxDateTime wxDateTime::GetYearDay(wxDateTime_t yday) const

 {
 {

-    return dt1.Subtract(dt2);
+    MODIFY_AND_RETURN( SetToYearDay(yday) );

 }
 
 }
 

-// comparison
-// ----------
+// ----------------------------------------------------------------------------
+// wxDateTime comparison
+// ----------------------------------------------------------------------------

 
 

-inline bool WXDLLIMPEXP_BASE 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 WXDLLIMPEXP_BASE 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 WXDLLIMPEXP_BASE 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 WXDLLIMPEXP_BASE 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 WXDLLIMPEXP_BASE 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 WXDLLIMPEXP_BASE 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"));

 
 

-inline wxTimeSpan WXDLLIMPEXP_BASE operator+(const wxTimeSpan& ts1,
-                                        const wxTimeSpan& ts2)
+    return wxDateTime(m_time + diff.GetValue());
+}
+
+inline wxDateTime& wxDateTime::Add(const wxTimeSpan& diff)

 {
 {

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

 }
 
 }
 

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

 {
 {

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

 }
 
 }
 

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

 {
 {

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

 }
 
 }
 

-inline wxTimeSpan WXDLLIMPEXP_BASE operator*(int n, const wxTimeSpan& ts)
+inline wxDateTime& wxDateTime::operator-=(const wxTimeSpan& diff)

 {
 {

-    return wxTimeSpan(ts).Multiply(n);
+    return Subtract(diff);

 }
 
 }
 

-// comparison
-// ----------
+inline wxTimeSpan wxDateTime::Subtract(const wxDateTime& datetime) const
+{
+    wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime"));
+
+    return wxTimeSpan(GetValue() - datetime.GetValue());
+}

 
 

-inline bool WXDLLIMPEXP_BASE operator<(const wxTimeSpan &t1, const wxTimeSpan &t2)
+inline wxTimeSpan wxDateTime::operator-(const wxDateTime& dt2) const

 {
 {

-    return t1.GetValue() < t2.GetValue();
+    return this->Subtract(dt2);

 }
 
 }
 

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

 {
 {

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

 }
 
 }
 

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

 {
 {

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

 }
 
 }
 

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

 {
 {

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

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

-// wxDateSpan
+// wxDateTime and timezones

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

-// comparison
-// ----------
+inline wxDateTime
+wxDateTime::ToTimezone(const wxDateTime::TimeZone& tz, bool noDST) const
+{
+    MODIFY_AND_RETURN( MakeTimezone(tz, noDST) );
+}

 
 

-// ds1 == d2 if and only if for every wxDateTime t t + ds1 == t + ds2
-inline WXDLLIMPEXP_BASE bool operator==(const wxDateSpan& ds1,
-                                   const wxDateSpan& ds2)
+inline wxDateTime
+wxDateTime::FromTimezone(const wxDateTime::TimeZone& tz, bool noDST) const

 {
 {

-    return ds1.GetYears() == ds2.GetYears() &&
-           ds1.GetMonths() == ds2.GetMonths() &&
-           ds1.GetTotalDays() == ds2.GetTotalDays();
+    MODIFY_AND_RETURN( MakeFromTimezone(tz, noDST) );

 }
 
 }
 

-inline WXDLLIMPEXP_BASE bool operator!=(const wxDateSpan& ds1,
-                                   const wxDateSpan& ds2)
+// ----------------------------------------------------------------------------
+// wxTimeSpan construction
+// ----------------------------------------------------------------------------
+
+inline wxTimeSpan::wxTimeSpan(long hours,
+                              long minutes,
+                              wxLongLong seconds,
+                              wxLongLong milliseconds)

 {
 {

-  return !(ds1 == ds2);
+    // 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;

 }
 
 }
 

-// arithmetics
-// -----------
+// ----------------------------------------------------------------------------
+// wxTimeSpan accessors
+// ----------------------------------------------------------------------------

 
 

-inline WXDLLIMPEXP_BASE 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 WXDLLIMPEXP_BASE 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());
+    // explicit cast to int suppresses a warning with CodeWarrior and possibly
+    // others (changing the return type to long from int is impossible in 2.8)
+    return (int)((GetSeconds() / 60l).GetLo());

 }
 
 }
 

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

 {
 {

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

 }
 
 }
 

-inline WXDLLIMPEXP_BASE 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 WXDLLIMPEXP_BASE void wxNextMonth(wxDateTime::Month& m)
+inline wxDateSpan& wxDateSpan::operator+=(const wxDateSpan& other)

 {
 {

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

 
 

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

 }
 
 }
 

-inline WXDLLIMPEXP_BASE void wxPrevMonth(wxDateTime::Month& m)
+inline wxDateSpan& wxDateSpan::Add(const wxDateSpan& other)

 {
 {

-    wxASSERT_MSG( m < wxDateTime::Inv_Month, _T("invalid month") );
+    return *this += other;
+}

 
 

-    m = m == wxDateTime::Jan ? wxDateTime::Inv_Month
-                             : (wxDateTime::Month)(m - 1);
+inline wxDateSpan wxDateSpan::Add(const wxDateSpan& other) const
+{
+    wxDateSpan ds(*this);
+    ds.Add(other);
+    return ds;

 }
 
 }
 

-inline WXDLLIMPEXP_BASE void wxNextWDay(wxDateTime::WeekDay& wd)
+inline wxDateSpan& wxDateSpan::Multiply(int factor)

 {
 {

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

 
 

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

 }
 
 }
 

-inline WXDLLIMPEXP_BASE void wxPrevWDay(wxDateTime::WeekDay& wd)
+inline wxDateSpan wxDateSpan::Multiply(int factor) const

 {
 {

-    wxASSERT_MSG( wd < wxDateTime::Inv_WeekDay, _T("invalid week day") );
+    wxDateSpan ds(*this);
+    ds.Multiply(factor);
+    return ds;
+}

 
 

-    wd = wd == wxDateTime::Sun ? wxDateTime::Inv_WeekDay
-                               : (wxDateTime::WeekDay)(wd - 1);
+inline wxDateSpan wxDateSpan::Negate() const
+{
+    return wxDateSpan(-m_years, -m_months, -m_weeks, -m_days);

 }
 
 }
 

+inline wxDateSpan& wxDateSpan::Neg()
+{
+    m_years = -m_years;
+    m_months = -m_months;
+    m_weeks = -m_weeks;
+    m_days = -m_days;
+
+    return *this;
+}
+
+inline wxDateSpan& wxDateSpan::operator-=(const wxDateSpan& other)
+{
+    return *this += other.Negate();
+}
+
+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 // wxUSE_DATETIME
 
 #endif // _WX_DATETIME_H