refs #584 Moved hash related stuff to dictionary.h

This also means moving Mixin::Icon from CContainerBase one step down the inheritance hierarchy
to resolve what would otherwise have been a circular include dependency.

src/blackmisc/dictionary.cpp

@@ -0,0 +1,47 @@
+/* Copyright (C) 2016
+ * 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 "dictionary.h"
+
+uint BlackMisc::calculateHash(const QList<uint> &values, const char *className)
+{
+    // http://stackoverflow.com/questions/113511/hash-code-implementation/113600#113600
+    if (values.isEmpty()) return 0;
+    uint hash = values.first();
+    for (int i = 1; i < values.size(); i++)
+    {
+        hash = 37 * hash + values.at(i);
+    }
+
+    // same values, but different class?
+    if (className)
+    {
+        hash = 37 * hash + qHash(QString(className));
+    }
+    return hash;
+}
+
+uint BlackMisc::calculateHash(const QList<int> &values, const char *className)
+{
+    QList<uint> list;
+    uint s = 0;
+    foreach(int i, values)
+    {
+        if (i >= 0)
+        {
+            list.append(static_cast<uint>(i));
+        }
+        else
+        {
+            list.append(static_cast<uint>(i));
+            list.append(s++);
+        }
+    }
+    return calculateHash(list, className);
+}