Fix FILETIME <-> wxDateTime conversions while DST is in effect in wxMSW.

The result was (consistently, so the tests still passed) off by an hour when
the program was ran while DST was in effect. Fix this by avoiding the use of
FileTimeToLocalFileTime() and LocalFileTimeToFileTime() and just directly
converting FILETIME values to wxDateTime. Not only this is more correct but
it's also simpler and more efficient as well.

Also add a unit test for wxFileName::SetTimes() too.

Closes #13098.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74423 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/filename/filenametest.cpp

@@ -35,6 +35,7 @@
 #endif // __UNIX__
 
 #include "testfile.h"
+#include "testdate.h"
 
 // ----------------------------------------------------------------------------
 // test data
@@ -139,6 +140,7 @@ private:
         CPPUNIT_TEST( TestVolumeUniqueName );
         CPPUNIT_TEST( TestCreateTempFileName );
         CPPUNIT_TEST( TestGetTimes );
+        CPPUNIT_TEST( TestSetTimes );
         CPPUNIT_TEST( TestExists );
         CPPUNIT_TEST( TestIsSame );
 #if defined(__UNIX__)
@@ -161,6 +163,7 @@ private:
     void TestVolumeUniqueName();
     void TestCreateTempFileName();
     void TestGetTimes();
+    void TestSetTimes();
     void TestExists();
     void TestIsSame();
 #if defined(__UNIX__)
@@ -664,6 +667,27 @@ void FileNameTestCase::TestGetTimes()
     CPPUNIT_ASSERT(dtAccess.IsEqualUpTo(wxDateTime::Now(), wxTimeSpan(0,1)));
 }
 
+void FileNameTestCase::TestSetTimes()
+{
+    wxFileName fn(wxFileName::CreateTempFileName("filenametest"));
+    CPPUNIT_ASSERT( fn.IsOk() );
+    wxON_BLOCK_EXIT1( wxRemoveFile, fn.GetFullPath() );
+
+    const wxDateTime dtAccess(1, wxDateTime::Jan, 2013);
+    const wxDateTime dtModify(1, wxDateTime::Feb, 2013);
+    const wxDateTime dtCreate(1, wxDateTime::Mar, 2013);
+
+    CPPUNIT_ASSERT( fn.SetTimes(&dtAccess, &dtModify, &dtCreate) );
+
+    wxDateTime dtAccess2,
+               dtModify2,
+               dtCreate2;
+    CPPUNIT_ASSERT( fn.GetTimes(&dtAccess2, &dtModify2, &dtCreate2) );
+    CPPUNIT_ASSERT_EQUAL( dtAccess, dtAccess2 );
+    CPPUNIT_ASSERT_EQUAL( dtModify, dtModify2 );
+    CPPUNIT_ASSERT_EQUAL( dtCreate, dtCreate2 );
+}
+
 void FileNameTestCase::TestExists()
 {
     wxFileName fn(wxFileName::CreateTempFileName("filenametest"));