X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f6bcfd974ef26faf6f91a62cac09827e09463fd1..173e8bbfb381073b502b74a89e8e666a7b293b9d:/include/wx/datetime.h

diff --git a/include/wx/datetime.h b/include/wx/datetime.h
index 688b2debf4..a9842fd982 100644
--- a/include/wx/datetime.h
+++ b/include/wx/datetime.h
@@ -36,6 +36,19 @@ 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 +113,7 @@ class WXDLLEXPORT wxDateSpan;
 // wxInvalidDateTime)
 class WXDLLEXPORT wxDateTime;
 
-WXDLLEXPORT_DATA(extern wxDateTime&) wxDefaultDateTime;
+WXDLLEXPORT_DATA(extern const wxDateTime&) wxDefaultDateTime;
 #define wxInvalidDateTime wxDefaultDateTime
 
 // ----------------------------------------------------------------------------
@@ -760,8 +773,9 @@ 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? Note that this will return TRUE for non
+        // initialized objects but FALSE if *this == wxInvalidDateTime
+    inline bool IsValid() const { return m_time != wxInvalidDateTime.m_time; }
 
         // get the broken down date/time representation in the given timezone
         //