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diff --git a/scumm/smush/chunk.h b/scumm/smush/chunk.h
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+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001/2002 The ScummVM project
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+
+#ifndef __CHUNK_H_
+#define __CHUNK_H_
+
+#include "config.h"
+
+/*! 	@brief Interface for Chunk handling
+
+	This class is an interface for reading from a Chunk.
+
+	\todo handle big endian system.
+*/
+class Chunk {
+public:
+	enum seek_type { seek_start, seek_end, seek_cur };
+	virtual ~Chunk() {};
+	typedef unsigned int type;			//!< type of a Chunk (i.e. The first 4byte field of the Chunk structure).
+	/*!	@brief convert a type to a string
+		
+		Utility function that convert a type to a string.
+		
+		@param t the type to convert to a string
+		
+		@return the converted string
+	*/
+	static const char * ChunkString(type t);
+
+	virtual type getType() const = 0;	//!< return the type of the Chunk
+	virtual unsigned int getSize() const = 0;	//!< return the size of the Chunk
+	virtual Chunk * subBlock() = 0; //!< extract a subChunk from the current read position
+	virtual bool eof() const = 0;	//!< is the Chunk completely read ?
+	virtual unsigned int tell() const = 0;	//!< get the Chunk current read position
+	virtual bool seek(int delta, seek_type dir = seek_cur) = 0;	//!< move the current read position inside the Chunk
+	virtual bool read(void * buffer, unsigned int size) = 0;		//!< read some data for the current read position
+	virtual char getChar() = 0;							//!< extract the character at the current read position
+	virtual unsigned char getByte() = 0;					//!< extract the byte at the current read position
+	virtual short getShort() = 0;						//!< extract the short at the current read position
+	virtual unsigned short getWord() = 0;					//!< extract the word at the current read position
+	virtual unsigned int getDword()= 0;					//!< extract the dword at the current read position
+};
+
+class FilePtr;
+
+/*! 	@brief file based ::Chunk
+
+	This class is an implementation of ::Chunk that handles file.
+
+*/
+class FileChunk : public Chunk {
+private:
+	FilePtr * _data;
+	type _type;
+	unsigned int _size;
+	unsigned int _offset;
+	unsigned int _curPos;
+protected:
+	FileChunk();
+public:
+	FileChunk(const char * fname);
+	virtual ~FileChunk();
+	type getType() const;
+	unsigned int getSize() const;
+	Chunk * subBlock();
+	bool eof() const;
+	unsigned int tell() const;
+	bool seek(int delta, seek_type dir = seek_cur);
+	bool read(void * buffer, unsigned int size);
+	char getChar();
+	unsigned char getByte();
+	short getShort();
+	unsigned short getWord();
+	unsigned int getDword();
+};
+
+/*! 	@brief memory based ::Chunk
+
+	This class is an implementation of ::Chunk that handles a memory buffer.
+*/
+class ContChunk : public Chunk {
+private:
+	char * _data;
+	Chunk::type _type;
+	unsigned int _size;
+	unsigned int _curPos;
+public:
+	ContChunk(char * data);
+	Chunk::type getType() const;
+	unsigned int getSize() const;
+	Chunk * subBlock();
+	bool eof() const;
+	unsigned int tell() const;
+	bool seek(int delta, seek_type dir = seek_cur);
+	bool read(void * buffer, unsigned int size);
+	char getChar();
+	unsigned char getByte();
+	short getShort();
+	unsigned short getWord();
+	unsigned int getDword();
+};
+
+#endif