1 files changed, 30 insertions, 2 deletions
diff --git a/src/corelib/tools/qdatetime.cpp b/src/corelib/tools/qdatetime.cpp
index 1b559cf..1277623 100644
--- a/src/corelib/tools/qdatetime.cpp
+++ b/src/corelib/tools/qdatetime.cpp
@@ -54,7 +54,6 @@
 #ifndef Q_WS_WIN
 #include <locale.h>
 #endif
-
 #include <time.h>
 #if defined(Q_OS_WINCE)
 #include "qfunctions_wince.h"
@@ -69,6 +68,31 @@
 #  define QDTPDEBUGN if (false) qDebug
 #endif
 
+#if defined(Q_OS_SYMBIAN)
+    // Workaround for OpenC bug.
+
+    // OpenC incorrectly caches DST information between localtime_r
+    // calls, i.e. if previous call to localtime_r has been called for DST
+    // affected date, also the second call will be affected by DST even
+    // the date is such that DST should not be applied.
+
+    // The workaround is to call mktime with non-DST affected date before
+    // calling localtime_r. mktime call resets the OpenC internal DST cache
+    // to right value and localtime_r will return correct values.
+#define FIX_OPENC_DSTCACHE \
+    tm localTM; \
+    localTM.tm_sec = 0; \
+    localTM.tm_min = 0; \
+    localTM.tm_hour = 12; \
+    localTM.tm_mday = 1; \
+    localTM.tm_mon = 1; \
+    localTM.tm_year = 2002 - 1900; \
+    localTM.tm_isdst = -1; \
+    time_t temp = mktime(&localTM);
+#else
+#define FIX_OPENC_DSTCACHE
+#endif
+
 #if defined(Q_WS_MAC)
 #include <private/qcore_mac_p.h>
 #endif
@@ -1138,6 +1162,7 @@ QDate QDate::currentDate()
     // use the reentrant version of localtime() where available
     tzset();
     tm res;
+    FIX_OPENC_DSTCACHE
     t = localtime_r(&ltime, &res);
 #else
     t = localtime(&ltime);
@@ -1834,12 +1859,13 @@ QTime QTime::currentTime()
     // use the reentrant version of localtime() where available
     tzset();
     tm res;
+    FIX_OPENC_DSTCACHE
     t = localtime_r(&ltime, &res);
 #else
     t = localtime(&ltime);
 #endif
     Q_CHECK_PTR(t);
-    
+
     ct.mds = MSECS_PER_HOUR * t->tm_hour + MSECS_PER_MIN * t->tm_min + 1000 * t->tm_sec
              + tv.tv_usec / 1000;
 #else
@@ -2887,6 +2913,7 @@ QDateTime QDateTime::currentDateTime()
     // use the reentrant version of localtime() where available
     tzset();
     tm res;
+    FIX_OPENC_DSTCACHE
     t = localtime_r(&ltime, &res);
 #else
     t = localtime(&ltime);
@@ -3704,6 +3731,7 @@ static QDateTimePrivate::Spec utcToLocal(QDate &date, QTime &time)
     // use the reentrant version of localtime() where available
     tzset();
     tm res;
+    FIX_OPENC_DSTCACHE
     brokenDown = localtime_r(&secsSince1Jan1970UTC, &res);
 #elif defined(_MSC_VER) && _MSC_VER >= 1400
     tm res;