Introduce double DateTime::Sub() as a substitute for friend double operator-()

Change-Id: Idb93b3e9b4dcbd09ad7f4253a523fe5be24d0776
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153354
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins

1 files changed, 6 insertions, 0 deletions

diff --git a/tools/source/datetime/datetime.cxx b/tools/source/datetime/datetime.cxx
index bb4c1ff173a5..f2e5a0e69c57 100644
--- a/tools/source/datetime/datetime.cxx
+++ b/tools/source/datetime/datetime.cxx
@@ -196,6 +196,12 @@ DateTime operator +( const DateTime& rDateTime, double fTimeInDays )
 
 double operator -( const DateTime& rDateTime1, const DateTime& rDateTime2 )
 {
+    return DateTime::Sub( rDateTime1, rDateTime2);
+}
+
+// static
+double DateTime::Sub( const DateTime& rDateTime1, const DateTime& rDateTime2 )
+{
     if (static_cast<const tools::Time&>(rDateTime1) != static_cast<const tools::Time&>(rDateTime2))
     {
         // Use Duration to diminish floating point accuracy errors.