cache return value of ftime

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13039 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/common/datetime.cpp b/src/common/datetime.cpp
index 23080fef24752804d61d316ba2f21cd7ea130159..7dc31201942b12699377b48881284bbecb86462c 100644 (file)
--- a/src/common/datetime.cpp
+++ b/src/common/datetime.cpp
@@ -102,14 +102,20 @@
         #define WX_TIMEZONE _timezone
     #elif defined(__MWERKS__)
         long wxmw_timezone = 28800;
         #define WX_TIMEZONE _timezone
     #elif defined(__MWERKS__)
         long wxmw_timezone = 28800;

-        #define WX_TIMEZONE wxmw_timezone;
+        #define WX_TIMEZONE wxmw_timezone

     #elif defined(__DJGPP__)
         #include <sys/timeb.h>
     #elif defined(__DJGPP__)
         #include <sys/timeb.h>

+        #include <values.h>

         static long wxGetTimeZone()
         {
         static long wxGetTimeZone()
         {

-            struct timeb tb;
-            ftime(&tb);
-            return tb.timezone;
+            static long timezone = MAXLONG; // invalid timezone
+            if (timezone == MAXLONG)
+            {
+                struct timeb tb;
+                ftime(&tb);
+                timezone = tb.timezone;
+            }
+            return timezone;

         }
         #define WX_TIMEZONE wxGetTimeZone()
     #else // unknown platform - try timezone
         }
         #define WX_TIMEZONE wxGetTimeZone()
     #else // unknown platform - try timezone