From 56381a9b28dbe4caf6e3d0a92dfddcddcebe3494 Mon Sep 17 00:00:00 2001
From: Lionel Elie Mamane <lionel@mamane.lu>
Date: Sat, 21 Dec 2013 10:37:11 +0100
Subject: [PATCH 084/109] fdo#72916 correct rounding of time part of DateTime

Change-Id: I135478755f9e5a844119129b470fef8de2cd0409
---
 connectivity/source/commontools/dbconversion.cxx | 16 +++++++++++++---
 include/connectivity/dbconversion.hxx            |  2 +-
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/connectivity/source/commontools/dbconversion.cxx b/connectivity/source/commontools/dbconversion.cxx
index 847f45f..15276a6 100644
--- a/connectivity/source/commontools/dbconversion.cxx
+++ b/connectivity/source/commontools/dbconversion.cxx
@@ -28,6 +28,7 @@
 #include <com/sun/star/util/Time.hpp>
 #include <com/sun/star/util/DateTime.hpp>
 #include <rtl/ustrbuf.hxx>
+#include <rtl/math.hxx>
 #include <unotools/datetime.hxx>
 #include <sstream>
 #include <iomanip>
@@ -355,10 +356,15 @@ namespace dbtools
         return aRet;
     }
     // -------------------------------------------------------------------------
-    utl::Time DBTypeConversion::toTime(double dVal)
+    utl::Time DBTypeConversion::toTime(double dVal, short nDigits)
     {
         sal_Int32 nDays     = (sal_Int32)dVal;
-        sal_Int64 nNS = static_cast<sal_Int64>((dVal - (double)nDays) * fNanoSecondsPerDay + 0.5);
+        sal_Int64 nNS;
+        {
+            double fSeconds((dVal - (double)nDays) * (fNanoSecondsPerDay / nanoSecInSec));
+            fSeconds = ::rtl::math::round( fSeconds, nDigits );
+            nNS = fSeconds * nanoSecInSec;
+        }
 
         sal_Int16 nSign;
         if ( nNS < 0 )
@@ -401,7 +407,11 @@ namespace dbtools
     utl::DateTime DBTypeConversion::toDateTime(double dVal, const utl::Date& _rNullDate)
     {
         utl::Date aDate = toDate(dVal, _rNullDate);
-        utl::Time aTime = toTime(dVal);
+        // there is not enough precision in a double to have both a date
+        // and a time up to nanoseconds -> limit to microseconds to have
+        // correct rounding, that is e.g. 13:00:00.000000000 instead of
+        // 12:59:59.999999790
+        utl::Time aTime = toTime(dVal, 6);
 
         utl::DateTime xRet;
 
diff --git a/include/connectivity/dbconversion.hxx b/include/connectivity/dbconversion.hxx
index 9536c79..b11442b 100644
--- a/include/connectivity/dbconversion.hxx
+++ b/include/connectivity/dbconversion.hxx
@@ -105,7 +105,7 @@ namespace dbtools
 
         static ::com::sun::star::util::Date     toDate(double dVal, const ::com::sun::star::util::Date& _rNullDate = getStandardDate());
         static ::com::sun::star::util::Date     toDate(const OUString& _sSQLDate);
-        static ::com::sun::star::util::Time     toTime(double dVal);
+        static ::com::sun::star::util::Time     toTime(double dVal, short nDigits = 9);
         static ::com::sun::star::util::Time     toTime(const OUString& _sSQLDate);
         static ::com::sun::star::util::DateTime toDateTime(double dVal, const ::com::sun::star::util::Date& _rNullDate = getStandardDate());
         static ::com::sun::star::util::DateTime toDateTime(const OUString& _sSQLDate);
-- 
1.8.4.2