Dramatically optimise inserting many items in wxGenericListCtrl.

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

diff --git a/include/wx/datetime.h b/include/wx/datetime.h
index 323540f813e5230601f209d27a457459d64534da..42279c2a38129d1a1ef41e046d021351c490ed12 100644 (file)
--- a/include/wx/datetime.h
+++ b/include/wx/datetime.h
@@ -53,27 +53,6 @@ struct _SYSTEMTIME;
  *   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:
 
@@ -128,8 +107,8 @@ WXDLLIMPEXP_BASE struct tm *wxGmtime_r(const time_t*, struct tm*);
 // wxInvalidDateTime)
 class WXDLLIMPEXP_FWD_BASE wxDateTime;
 
-extern WXDLLIMPEXP_DATA_BASE(const char *) wxDefaultDateTimeFormat;
-extern WXDLLIMPEXP_DATA_BASE(const char *) wxDefaultTimeSpanFormat;
+extern WXDLLIMPEXP_DATA_BASE(const char) wxDefaultDateTimeFormat[];
+extern WXDLLIMPEXP_DATA_BASE(const char) wxDefaultTimeSpanFormat[];
 extern WXDLLIMPEXP_DATA_BASE(const wxDateTime) wxDefaultDateTime;
 
 #define wxInvalidDateTime wxDefaultDateTime
@@ -139,9 +118,12 @@ extern WXDLLIMPEXP_DATA_BASE(const wxDateTime) wxDefaultDateTime;
 // conditional compilation
 // ----------------------------------------------------------------------------
 
-// everyone has strftime except Win CE unless VC8 is used
-#if !defined(__WXWINCE__) || defined(__VISUALC8__)
-    #define HAVE_STRFTIME
+// if configure detected strftime(), we have it too
+#ifdef HAVE_STRFTIME
+    #define wxHAS_STRFTIME
+// suppose everyone else has strftime except Win CE unless VC8 is used
+#elif !defined(__WXWINCE__) || defined(__VISUALC8__)
+    #define wxHAS_STRFTIME
 #endif
 
 // ----------------------------------------------------------------------------
@@ -170,7 +152,7 @@ public:
         // the time in the current time zone
         Local,
 
-        // zones from GMT (= Greenwhich Mean Time): they're guaranteed to be
+        // zones from GMT (= Greenwich Mean Time): they're guaranteed to be
         // consequent numbers, so writing something like `GMT0 + offset' is
         // safe if abs(offset) <= 12
 
@@ -244,7 +226,7 @@ public:
         // adoption of the Gregorian calendar (see IsGregorian())
         //
         // All data and comments taken verbatim from "The Calendar FAQ (v 2.0)"
-        // by Claus T�ndering, http://www.pip.dknet.dk/~c-t/calendar.html
+        // by Claus Tøndering, http://www.pip.dknet.dk/~c-t/calendar.html
         // except for the comments "we take".
         //
         // Symbol "->" should be read as "was followed by" in the comments
@@ -459,7 +441,9 @@ public:
         //     instead of modifying the member fields directly!
     struct WXDLLIMPEXP_BASE Tm
     {
-        wxDateTime_t msec, sec, min, hour, mday;
+        wxDateTime_t msec, sec, min, hour,
+                     mday,  // Day of the month in 1..31 range.
+                     yday;  // Day of the year in 0..365 range.
         Month mon;
         int year;
 
@@ -494,9 +478,10 @@ public:
         // the timezone we correspond to
         TimeZone m_tz;
 
-        // these values can't be accessed directly because they're not always
-        // computed and we calculate them on demand
-        wxDateTime_t wday, yday;
+        // This value can only be accessed via GetWeekDay() and not directly
+        // because it's not always computed when creating this object and may
+        // need to be calculated on demand.
+        wxDateTime_t wday;
     };
 
     // static methods
@@ -944,12 +929,15 @@ public:
     // SYSTEMTIME format
     // ------------------------------------------------------------------------
 #ifdef __WXMSW__
-
     // convert SYSTEMTIME to wxDateTime
-    wxDateTime& SetFromMSWSysTime(const struct _SYSTEMTIME&);
+    wxDateTime& SetFromMSWSysTime(const struct _SYSTEMTIME& st);
 
     // convert wxDateTime to SYSTEMTIME
-    void GetAsMSWSysTime(struct _SYSTEMTIME*) const;
+    void GetAsMSWSysTime(struct _SYSTEMTIME* st) const;
+
+    // same as above but only take date part into account, time is always zero
+    wxDateTime& SetFromMSWSysDate(const struct _SYSTEMTIME& st);
+    void GetAsMSWSysDate(struct _SYSTEMTIME* st) const;
 #endif // __WXMSW__
 
     // comparison (see also functions below for operator versions)
@@ -982,37 +970,37 @@ public:
 
     inline bool operator<(const wxDateTime& dt) const
     {
-        wxASSERT_MSG( IsValid() && dt.IsValid(), _T("invalid wxDateTime") );
+        wxASSERT_MSG( IsValid() && dt.IsValid(), wxT("invalid wxDateTime") );
         return GetValue() < dt.GetValue();
     }
 
     inline bool operator<=(const wxDateTime& dt) const
     {
-        wxASSERT_MSG( IsValid() && dt.IsValid(), _T("invalid wxDateTime") );
+        wxASSERT_MSG( IsValid() && dt.IsValid(), wxT("invalid wxDateTime") );
         return GetValue() <= dt.GetValue();
     }
 
     inline bool operator>(const wxDateTime& dt) const
     {
-        wxASSERT_MSG( IsValid() && dt.IsValid(), _T("invalid wxDateTime") );
+        wxASSERT_MSG( IsValid() && dt.IsValid(), wxT("invalid wxDateTime") );
         return GetValue() > dt.GetValue();
     }
 
     inline bool operator>=(const wxDateTime& dt) const
     {
-        wxASSERT_MSG( IsValid() && dt.IsValid(), _T("invalid wxDateTime") );
+        wxASSERT_MSG( IsValid() && dt.IsValid(), wxT("invalid wxDateTime") );
         return GetValue() >= dt.GetValue();
     }
 
     inline bool operator==(const wxDateTime& dt) const
     {
-        wxASSERT_MSG( IsValid() && dt.IsValid(), _T("invalid wxDateTime") );
+        wxASSERT_MSG( IsValid() && dt.IsValid(), wxT("invalid wxDateTime") );
         return GetValue() == dt.GetValue();
     }
 
     inline bool operator!=(const wxDateTime& dt) const
     {
-        wxASSERT_MSG( IsValid() && dt.IsValid(), _T("invalid wxDateTime") );
+        wxASSERT_MSG( IsValid() && dt.IsValid(), wxT("invalid wxDateTime") );
         return GetValue() != dt.GetValue();
     }
 
@@ -1719,7 +1707,9 @@ protected:
 
 inline bool wxDateTime::IsInStdRange() const
 {
-    return m_time >= 0l && (m_time / TIME_T_FACTOR) < LONG_MAX;
+    // currently we don't know what is the real type of time_t so prefer to err
+    // on the safe side and limit it to 32 bit values which is safe everywhere
+    return m_time >= 0l && (m_time / TIME_T_FACTOR) < wxINT32_MAX;
 }
 
 /* static */
@@ -1779,7 +1769,7 @@ inline wxDateTime::wxDateTime(double jdn)
 
 inline wxDateTime& wxDateTime::Set(const Tm& tm)
 {
-    wxASSERT_MSG( tm.IsValid(), _T("invalid broken down date/time") );
+    wxASSERT_MSG( tm.IsValid(), wxT("invalid broken down date/time") );
 
     return Set(tm.mday, (Month)tm.mon, tm.year,
                tm.hour, tm.min, tm.sec, tm.msec);
@@ -1810,14 +1800,14 @@ inline wxDateTime::wxDateTime(wxDateTime_t day,
 
 inline wxLongLong wxDateTime::GetValue() const
 {
-    wxASSERT_MSG( IsValid(), _T("invalid wxDateTime"));
+    wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime"));
 
     return m_time;
 }
 
 inline time_t wxDateTime::GetTicks() const
 {
-    wxASSERT_MSG( IsValid(), _T("invalid wxDateTime"));
+    wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime"));
     if ( !IsInStdRange() )
     {
         return (time_t)-1;
@@ -1885,21 +1875,21 @@ inline wxDateTime wxDateTime::GetYearDay(wxDateTime_t yday) const
 
 inline bool wxDateTime::IsEqualTo(const wxDateTime& datetime) const
 {
-    wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime"));
+    wxASSERT_MSG( IsValid() && datetime.IsValid(), wxT("invalid wxDateTime"));
 
     return m_time == datetime.m_time;
 }
 
 inline bool wxDateTime::IsEarlierThan(const wxDateTime& datetime) const
 {
-    wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime"));
+    wxASSERT_MSG( IsValid() && datetime.IsValid(), wxT("invalid wxDateTime"));
 
     return m_time < datetime.m_time;
 }
 
 inline bool wxDateTime::IsLaterThan(const wxDateTime& datetime) const
 {
-    wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime"));
+    wxASSERT_MSG( IsValid() && datetime.IsValid(), wxT("invalid wxDateTime"));
 
     return m_time > datetime.m_time;
 }
@@ -1956,14 +1946,14 @@ inline bool wxDateTime::IsEqualUpTo(const wxDateTime& dt,
 
 inline wxDateTime wxDateTime::Add(const wxTimeSpan& diff) const
 {
-    wxASSERT_MSG( IsValid(), _T("invalid wxDateTime"));
+    wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime"));
 
     return wxDateTime(m_time + diff.GetValue());
 }
 
 inline wxDateTime& wxDateTime::Add(const wxTimeSpan& diff)
 {
-    wxASSERT_MSG( IsValid(), _T("invalid wxDateTime"));
+    wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime"));
 
     m_time += diff.GetValue();
 
@@ -1977,14 +1967,14 @@ inline wxDateTime& wxDateTime::operator+=(const wxTimeSpan& diff)
 
 inline wxDateTime wxDateTime::Subtract(const wxTimeSpan& diff) const
 {
-    wxASSERT_MSG( IsValid(), _T("invalid wxDateTime"));
+    wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime"));
 
     return wxDateTime(m_time - diff.GetValue());
 }
 
 inline wxDateTime& wxDateTime::Subtract(const wxTimeSpan& diff)
 {
-    wxASSERT_MSG( IsValid(), _T("invalid wxDateTime"));
+    wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime"));
 
     m_time -= diff.GetValue();
 
@@ -1998,7 +1988,7 @@ inline wxDateTime& wxDateTime::operator-=(const wxTimeSpan& diff)
 
 inline wxTimeSpan wxDateTime::Subtract(const wxDateTime& datetime) const
 {
-    wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime"));
+    wxASSERT_MSG( IsValid() && datetime.IsValid(), wxT("invalid wxDateTime"));
 
     return wxTimeSpan(GetValue() - datetime.GetValue());
 }