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diff --git a/engines/sword25/kernel/log.h b/engines/sword25/kernel/log.h
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+++ b/engines/sword25/kernel/log.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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.
+
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+/*
+ * This code is based on Broken Sword 2.5 engine
+ *
+ * Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
+ *
+ * Licensed under GNU GPL v2
+ *
+ */
+
+#ifndef SWORD25_LOG_H
+#define SWORD25_LOG_H
+
+// Includes
+#include "common/array.h"
+#include "common/file.h"
+#include "sword25/kernel/common.h"
+
+namespace Sword25 {
+
+// Logging soll nur stattfinden wenn es aktiviert ist
+#ifdef BS_ACTIVATE_LOGGING
+
+// Logging-Makros
+#define BS_LOG              BS_Log::SetPrefix(BS_LOG_PREFIX ": "), BS_Log::LogDecorated
+#define BS_LOGLN            BS_Log::SetPrefix(BS_LOG_PREFIX ": "), BS_Log::SetAutoNewline(true), BS_Log::LogDecorated
+#define BS_LOG_WARNING      BS_Log::SetPrefix(BS_LOG_PREFIX ": WARNING - "), BS_Log::LogDecorated
+#define BS_LOG_WARNINGLN    BS_Log::SetPrefix(BS_LOG_PREFIX ": WARNING - "), BS_Log::SetAutoNewline(true), BS_Log::LogDecorated
+#define BS_LOG_ERROR        BS_Log::SetPrefix(BS_LOG_PREFIX ": ERROR - "), BS_Log::LogDecorated
+#define BS_LOG_ERRORLN      BS_Log::SetPrefix(BS_LOG_PREFIX ": ERROR - "), BS_Log::SetAutoNewline(true), BS_Log::LogDecorated
+#define BS_LOG_EXTERROR     BS_Log::SetPrefix(BS_LOG_PREFIX ": ERROR "), BS_Log::SetFile(__FILE__), BS_Log::SetLine(__LINE__), BS_Log::LogDecorated
+#define BS_LOG_EXTERRORLN   BS_Log::SetPrefix(BS_LOG_PREFIX ": ERROR "), BS_Log::SetFile(__FILE__), BS_Log::SetLine(__LINE__),  BS_Log::SetAutoNewline(true), BS_Log::LogDecorated
+
+// Die Version der Logging-Klasse mit aktiviertem Logging
+class BS_Log {
+public:
+	static void Clear();
+	static void Log(const char *Format, ...);
+	static void LogPrefix(const char *Prefix, const char *Format, ...);
+	static void LogDecorated(const char *Format, ...);
+
+	static void SetPrefix(const char *Prefix) {
+		_Prefix = Prefix;
+	}
+	static void SetFile(const char *File) {
+		_File = File;
+	}
+	static void SetLine(int Line) {
+		_Line = Line;
+	}
+	static void SetAutoNewline(bool AutoNewline) {
+		_AutoNewline = AutoNewline;
+	}
+
+	typedef void (*LOG_LISTENER_CALLBACK)(const char *);
+	static void RegisterLogListener(LOG_LISTENER_CALLBACK Callback) {
+		_LogListener.push_back(Callback);
+	}
+	static bool IsListenerRegistered(LOG_LISTENER_CALLBACK Callback) {
+		Common::Array<LOG_LISTENER_CALLBACK>::iterator i;
+		for (i = _LogListener.begin(); i != _LogListener.end(); ++i) {
+			if (**i == Callback)
+				return true;
+		}
+		return false;
+	}
+	static void _CloseLog();
+
+private:
+	static Common::WriteStream                 *_LogFile;
+	static bool                                 _LineBegin;
+	static const char                          *_Prefix;
+	static const char                          *_File;
+	static int                                  _Line;
+	static bool                                 _AutoNewline;
+	static Common::Array<LOG_LISTENER_CALLBACK> _LogListener;
+
+	static bool _CreateLog();
+
+	static int _WriteLog(const char *Message);
+	static void _FlushLog();
+};
+
+// Auxiliary function that allows to log C functions (needed for Lua).
+#define BS_Log_C error
+
+
+#else
+
+// Logging-Macros
+#define BS_LOG
+#define BS_LOGLN
+#define BS_LOG_WARNING
+#define BS_LOG_WARNINGLN
+#define BS_LOG_ERROR
+#define BS_LOG_ERRORLN
+#define BS_LOG_EXTERROR
+#define BS_LOG_EXTERRORLN
+
+// The version of the logging class with logging disabled
+class BS_Log {
+public:
+	// This version implements all the various methods as empty stubs
+	static void Log(const char *Text, ...) {};
+	static void LogPrefix(const char *Prefix, const char *Format, ...) {};
+	static void LogDecorated(const char *Format, ...) {};
+
+	static void SetPrefix(const char *Prefix) {};
+	static void SetFile(const char *File) {};
+	static void SetLine(int Line) {};
+	static void SetAutoNewline(bool AutoNewline) {};
+
+	typedef void (*LOG_LISTENER_CALLBACK)(const char *);
+	static void RegisterLogListener(LOG_LISTENER_CALLBACK Callback) {};
+};
+
+#define BS_Log_C error
+
+#endif
+
+} // End of namespace Sword25
+
+#endif