1 files changed, 78 insertions, 0 deletions
diff --git a/filter/source/msfilter/util.cxx b/filter/source/msfilter/util.cxx
index 03df8afb583a..adfe49222955 100644
--- a/filter/source/msfilter/util.cxx
+++ b/filter/source/msfilter/util.cxx
@@ -27,6 +27,7 @@
  */
 
 #include <rtl/ustring.hxx>
+#include <rtl/strbuf.hxx>
 #include <vcl/svapp.hxx>
 #include <filter/msfilter/util.hxx>
 
@@ -62,6 +63,83 @@ sal_uInt32 BGRToRGB(sal_uInt32 nColor)
     return nColor;
 }
 
+DateTime DTTM2DateTime( long lDTTM )
+{
+    /*
+    mint    short   :6  0000003F    minutes (0-59)
+    hr      short   :5  000007C0    hours (0-23)
+    dom     short   :5  0000F800    days of month (1-31)
+    mon     short   :4  000F0000    months (1-12)
+    yr      short   :9  1FF00000    years (1900-2411)-1900
+    wdy     short   :3  E0000000    weekday(Sunday=0
+                                            Monday=1
+    ( wdy can be ignored )                  Tuesday=2
+                                            Wednesday=3
+                                            Thursday=4
+                                            Friday=5
+                                            Saturday=6)
+    */
+    DateTime aDateTime(Date( 0 ), Time( 0 ));
+    if( lDTTM )
+    {
+        sal_uInt16 lMin = (sal_uInt16)(lDTTM & 0x0000003F);
+        lDTTM >>= 6;
+        sal_uInt16 lHour= (sal_uInt16)(lDTTM & 0x0000001F);
+        lDTTM >>= 5;
+        sal_uInt16 lDay = (sal_uInt16)(lDTTM & 0x0000001F);
+        lDTTM >>= 5;
+        sal_uInt16 lMon = (sal_uInt16)(lDTTM & 0x0000000F);
+        lDTTM >>= 4;
+        sal_uInt16 lYear= (sal_uInt16)(lDTTM & 0x000001FF) + 1900;
+        aDateTime = DateTime(Date(lDay, lMon, lYear), Time(lHour, lMin));
+    }
+    return aDateTime;
+}
+
+/// Append the number as 2-digit when less than 10.
+static void lcl_AppendTwoDigits( rtl::OStringBuffer &rBuffer, sal_Int32 nNum )
+{
+    if ( nNum < 0 || nNum > 99 )
+    {
+        rBuffer.append( "00" );
+        return;
+    }
+
+    if ( nNum < 10 )
+        rBuffer.append( '0' );
+
+    rBuffer.append( nNum );
+}
+
+rtl::OString DateTimeToOString( const DateTime& rDateTime )
+{
+    DateTime aInUTC( rDateTime );
+// HACK: this is correct according to the spec, but MSOffice believes everybody lives
+// in UTC+0 when reading it back
+//    aInUTC.ConvertToUTC();
+
+    rtl::OStringBuffer aBuffer( 25 );
+    aBuffer.append( sal_Int32( aInUTC.GetYear() ) );
+    aBuffer.append( '-' );
+
+    lcl_AppendTwoDigits( aBuffer, aInUTC.GetMonth() );
+    aBuffer.append( '-' );
+
+    lcl_AppendTwoDigits( aBuffer, aInUTC.GetDay() );
+    aBuffer.append( 'T' );
+
+    lcl_AppendTwoDigits( aBuffer, aInUTC.GetHour() );
+    aBuffer.append( ':' );
+
+    lcl_AppendTwoDigits( aBuffer, aInUTC.GetMin() );
+    aBuffer.append( ':' );
+
+    lcl_AppendTwoDigits( aBuffer, aInUTC.GetSec() );
+    aBuffer.append( 'Z' ); // we are in UTC
+
+    return aBuffer.makeStringAndClear();
+}
+
 }
 }