Big structure update

- files split into common and app-specific ones
- messages from parser and finder separated
- ffsEngine split into multiple classes to reduce complexity
- still no image rebuild

common/descriptor.cpp

@@ -0,0 +1,41 @@
+/* descriptor.cpp
+
+Copyright (c) 2015, Nikolaj Schlej. All rights reserved.
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution.  The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHWARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+*/
+
+#include <QObject>
+#include "descriptor.h"
+
+// Calculate address of data structure addressed by descriptor address format
+// 8 bit base or limit
+const UINT8* calculateAddress8(const UINT8* baseAddress, const UINT8 baseOrLimit)
+{
+    return baseAddress + baseOrLimit * 0x10;
+}
+
+// 16 bit base or limit
+const UINT8* calculateAddress16(const UINT8* baseAddress, const UINT16 baseOrLimit)
+{
+    return baseAddress + baseOrLimit * 0x1000;
+}
+
+// Calculate offset of region using its base
+UINT32 calculateRegionOffset(const UINT16 base)
+{
+    return base * 0x1000;
+}
+
+//Calculate size of region using its base and limit
+UINT32 calculateRegionSize(const UINT16 base, const UINT16 limit)
+{
+    if (limit)
+        return (limit + 1 - base) * 0x1000;
+    return 0;
+}