refs #501, compareByPropertyIndex (performance for sort)

src/blackmisc/comparefunctions.cpp

@@ -0,0 +1,42 @@
+/* Copyright (C) 2015
+ * swift Project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "comparefunctions.h"
+
+namespace BlackMisc
+{
+    namespace Compare
+    {
+        int compare(bool a, bool b)
+        {
+            if ((a && b) || (!a && !b)) return 0;
+            if (a && !b) return 10;
+            return -10;
+        }
+
+        int compare(int a, int b)
+        {
+            if (a == b) return 0;
+            return a < b ? -10 : 10;
+        }
+
+        int compare(qint64 a, qint64 b)
+        {
+            if (a == b) return 0;
+            return a < b ? -10 : 10;
+        }
+
+        int compare(double a, double b)
+        {
+            if (a == b) return 0;
+            return a < b ? -10 : 10;
+        }
+
+    } // ns
+} // ns