1 files changed, 112 insertions, 0 deletions
diff --git a/engines/sword25/kernel/persistenceblock.h b/engines/sword25/kernel/persistenceblock.h
new file mode 100755
index 0000000000..4dda4388b7
--- /dev/null
+++ b/engines/sword25/kernel/persistenceblock.h
@@ -0,0 +1,112 @@
+// -----------------------------------------------------------------------------
+// This file is part of Broken Sword 2.5
+// Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdörfer
+//
+// Broken Sword 2.5 is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// Broken Sword 2.5 is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Broken Sword 2.5; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+// -----------------------------------------------------------------------------
+
+#ifndef	BS_PERSISTENCEBLOCK_H
+#define BS_PERSISTENCEBLOCK_H
+
+// -----------------------------------------------------------------------------
+// Includes
+// -----------------------------------------------------------------------------
+
+#include "kernel/common.h"
+
+
+// -----------------------------------------------------------------------------
+// Class definition
+// -----------------------------------------------------------------------------
+
+class BS_PersistenceBlock
+{
+public:
+	static unsigned int GetSInt32Size() { return sizeof(signed int) + sizeof(unsigned char); }
+	static unsigned int GetUInt32Size() { return sizeof(unsigned int) + sizeof(unsigned char); }
+	static unsigned int GetFloat32Size() { return sizeof(float) + sizeof(unsigned char); }
+	static unsigned int GetBoolSize() { return sizeof(unsigned char) + sizeof(unsigned char); }
+	static unsigned int GetStringSize(const std::string & String) { return static_cast<unsigned int>(sizeof(unsigned int) + String.size() + sizeof(unsigned char)); }
+
+protected:
+	enum
+	{
+		SINT_MARKER,
+		UINT_MARKER,
+		FLOAT_MARKER,
+		STRING_MARKER,
+		BOOL_MARKER,
+		BLOCK_MARKER,
+	};
+
+	// -----------------------------------------------------------------------------
+	// Endianess Conversions
+	// -----------------------------------------------------------------------------
+	//
+	// Alles wird in Little Endian gespeichert.
+	// Auf Big Endian-Systemen muss die Bytereihenfolge daher vor dem Speichern und nach dem Einlesen gespeicherter Werte vertauscht werden.
+	//
+
+	template<typename T>
+	static T ConvertEndianessFromSystemToStorage(T Value)
+	{
+		if (IsBigEndian()) ReverseByteOrder(&Value);
+		return Value;
+	}
+
+	template<typename T>
+	static T ConvertEndianessFromStorageToSystem(T Value)
+	{
+		if (IsBigEndian()) ReverseByteOrder(&Value);
+		return Value;
+	}
+
+private:
+	static bool IsBigEndian()
+	{
+		unsigned int Dummy = 1;
+		unsigned char * DummyPtr = reinterpret_cast<unsigned char *>(&Dummy);
+		return DummyPtr[0] == 0;
+	}
+
+	template<typename T>
+	static void Swap(T & One, T & Two)
+	{
+		T Temp = One;
+		One = Two;
+		Two = Temp;
+	}
+
+	static void ReverseByteOrder(void * Ptr)
+	{
+		// Kehrt die Bytereihenfolge des 32-Bit Wortes um auf das Ptr zeigt.
+		unsigned char * CharPtr = static_cast<unsigned char *>(Ptr);
+		Swap(CharPtr[0], CharPtr[3]);
+		Swap(CharPtr[1], CharPtr[2]);
+	}
+};
+
+// -----------------------------------------------------------------------------
+// Compile time asserts
+// -----------------------------------------------------------------------------
+
+#define CTASSERT(ex) typedef char ctassert_type[(ex) ? 1 : -1];
+CTASSERT(sizeof(unsigned char) == 1);
+CTASSERT(sizeof(signed int) == 4);
+CTASSERT(sizeof(unsigned int) == 4);
+CTASSERT(sizeof(float) == 4);
+#undef CTASSERT
+
+#endif