X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f6bcfd974ef26faf6f91a62cac09827e09463fd1..60b73526d6797ee466c272dbfca962a230bc5908:/include/wx/datetime.h

diff --git a/include/wx/datetime.h b/include/wx/datetime.h
index 688b2debf4..1dc31ef6d5 100644
--- a/include/wx/datetime.h
+++ b/include/wx/datetime.h
@@ -17,6 +17,8 @@
     #pragma interface "datetime.h"
 #endif
 
+#if wxUSE_DATETIME
+
 #include <time.h>
 #include <limits.h>             // for INT_MIN
 
@@ -36,6 +38,19 @@ class WXDLLEXPORT wxDateSpan;
     #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
+
+#ifdef __WXMAC__
+#if __MSL__ < 0x6000
+    #define WX_TIME_BASE_OFFSET ( 2082844800L + 126144000L )
+#else
+    #define WX_TIME_BASE_OFFSET 0
+#endif
+#else
+    #define WX_TIME_BASE_OFFSET 0
+#endif
 /*
  * TODO
  *
@@ -100,7 +115,7 @@ class WXDLLEXPORT wxDateSpan;
 // wxInvalidDateTime)
 class WXDLLEXPORT wxDateTime;
 
-WXDLLEXPORT_DATA(extern wxDateTime&) wxDefaultDateTime;
+WXDLLEXPORT_DATA(extern const wxDateTime&) wxDefaultDateTime;
 #define wxInvalidDateTime wxDefaultDateTime
 
 // ----------------------------------------------------------------------------
@@ -526,7 +541,7 @@ public:
     // ------------------------------------------------------------------------
 
         // 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)
 #if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400))
@@ -548,7 +563,7 @@ public:
                       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,
@@ -591,7 +606,7 @@ public:
         // from separate values for each component with explicit date
         // (defaults for month and year are the current values)
     wxDateTime& Set(wxDateTime_t day,
-                    Month        month = Inv_Month,
+                    Month        month,
                     int          year = Inv_Year, // 1999, not 99 please!
                     wxDateTime_t hour = 0,
                     wxDateTime_t minute = 0,
@@ -760,8 +775,8 @@ public:
     // 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
         //
@@ -1557,4 +1572,6 @@ inline WXDLLEXPORT void wxPrevWDay(wxDateTime::WeekDay& wd)
                                : (wxDateTime::WeekDay)(wd - 1);
 }
 
+#endif // wxUSE_DATETIME
+
 #endif // _WX_DATETIME_H