trunk/src/RIFF.h

/***************************************************************************
 *                                                                         *
 *   libgig - C++ cross-platform Gigasampler format file access library    *
 *                                                                         *
 *   Copyright (C) 2003-2007 by Christian Schoenebeck                      *
 *                              <cuse@users.sourceforge.net>               *
 *                                                                         *
 *   This library 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 library 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 library; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#ifndef __RIFF_H__
#define __RIFF_H__

#ifdef WIN32
# define POSIX 0
#endif

#ifndef POSIX
# define POSIX 1
#endif

#ifndef DEBUG
# define DEBUG 0
#endif

#include <string>
#include <list>
#include <set>
#include <map>
#include <iostream>

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#if POSIX
# include <sys/types.h>
# include <sys/stat.h>
# include <fcntl.h>
# include <unistd.h>
#endif // POSIX

#ifdef _MSC_VER
// Visual C++ 2008 doesn't have stdint.h
typedef __int8 int8_t;
typedef __int16 int16_t;
typedef __int32 int32_t;
typedef __int64 int64_t;
typedef unsigned __int8 uint8_t;
typedef unsigned __int16 uint16_t;
typedef unsigned __int32 uint32_t;
typedef unsigned __int64 uint64_t;
#else
#include <stdint.h>
#endif

#ifdef WIN32
# include <windows.h>
  typedef unsigned int   uint;
#endif // WIN32

#include <stdio.h>

#if WORDS_BIGENDIAN
# define CHUNK_ID_RIFF  0x52494646
# define CHUNK_ID_RIFX  0x52494658
# define CHUNK_ID_LIST  0x4C495354
#else  // little endian
# define CHUNK_ID_RIFF  0x46464952
# define CHUNK_ID_RIFX  0x58464952
# define CHUNK_ID_LIST  0x5453494C
#endif // WORDS_BIGENDIAN

#define CHUNK_HEADER_SIZE       8
#define LIST_HEADER_SIZE        12
#define RIFF_HEADER_SIZE        12


/**
 * @brief RIFF specific classes and definitions
 *
 * The Resource Interchange File Format (RIFF) is a generic tree-structured
 * meta-format which stores data in so called "chunks". It can be compared
 * to XML, but in contrast to XML, RIFF is entirely binary encoded, that is
 * not ASCII based. RIFF is used as basis for many file formats like AVI,
 * WAV, DLS and of course the Gigasampler file format. ;-)
 *
 * RIFF chunks can be seen as containers for data. There are two distinct
 * types of chunks:
 *
 * - @e ordinary @e chunks are the leafs of the data tree which encapsulate
 *   the actual data of the file (i.e. the sample data of a .wav file)
 *
 * - @e list @e chunks are the nodes of the data tree which hold an
 *   arbitrary amount of subchunks (can be both, list chunks and/or ordinary
 *   chunks)
 */
namespace RIFF {

    /* just symbol prototyping */
    class Chunk;
    class List;
    class File;

    typedef std::string String;

    /** Whether file stream is open in read or in read/write mode. */
    typedef enum {
        stream_mode_read       = 0,
        stream_mode_read_write = 1,
        stream_mode_closed     = 2
    } stream_mode_t;

    /** Current state of the file stream. */
    typedef enum {
        stream_ready       = 0,
        stream_end_reached = 1,
        stream_closed      = 2
    } stream_state_t;

    /** File stream position dependent to these relations. */
    typedef enum {
        stream_start    = 0,
        stream_curpos   = 1,
        stream_backward = 2,
        stream_end      = 3
    } stream_whence_t;

    /** Alignment of data bytes in memory (system dependant). */
    typedef enum {
        endian_little = 0,
        endian_big    = 1,
        endian_native = 2
    } endian_t;

    /** @brief Ordinary RIFF Chunk
     *
     * Provides convenient methods to access data of ordinary RIFF chunks
     * in general.
     */
    class Chunk {
        public:
            Chunk(File* pFile, unsigned long StartPos, List* Parent);
            String         GetChunkIDString();
            uint32_t       GetChunkID() { return ChunkID; }             ///< Chunk ID in unsigned integer representation.
            List*          GetParent()  { return pParent; }             ///< Returns pointer to the chunk's parent list chunk.
            unsigned long  GetSize()    { return CurrentChunkSize; }    ///< Chunk size in bytes (without header, thus the chunk data body)
            unsigned long  GetNewSize() { return NewChunkSize;     }    ///< New chunk size if it was modified with Resize().
            unsigned long  GetPos()     { return ulPos; }               ///< Position within the chunk data body
            unsigned long  GetFilePos() { return ulStartPos + ulPos; }  ///< Current, actual offset in file.
            unsigned long  SetPos(unsigned long Where, stream_whence_t Whence = stream_start);
            unsigned long  RemainingBytes();
            stream_state_t GetState();
            unsigned long  Read(void* pData, unsigned long WordCount, unsigned long WordSize);
            unsigned long  ReadInt8(int8_t* pData,     unsigned long WordCount = 1);
            unsigned long  ReadUint8(uint8_t* pData,   unsigned long WordCount = 1);
            unsigned long  ReadInt16(int16_t* pData,   unsigned long WordCount = 1);
            unsigned long  ReadUint16(uint16_t* pData, unsigned long WordCount = 1);
            unsigned long  ReadInt32(int32_t* pData,   unsigned long WordCount = 1);
            unsigned long  ReadUint32(uint32_t* pData, unsigned long WordCount = 1);
            int8_t         ReadInt8();
            uint8_t        ReadUint8();
            int16_t        ReadInt16();
            uint16_t       ReadUint16();
            int32_t        ReadInt32();
            uint32_t       ReadUint32();
            unsigned long  Write(void* pData, unsigned long WordCount, unsigned long WordSize);
            unsigned long  WriteInt8(int8_t* pData,     unsigned long WordCount = 1);
            unsigned long  WriteUint8(uint8_t* pData,   unsigned long WordCount = 1);
            unsigned long  WriteInt16(int16_t* pData,   unsigned long WordCount = 1);
            unsigned long  WriteUint16(uint16_t* pData, unsigned long WordCount = 1);
            unsigned long  WriteInt32(int32_t* pData,   unsigned long WordCount = 1);
            unsigned long  WriteUint32(uint32_t* pData, unsigned long WordCount = 1);
            void*          LoadChunkData();
            void           ReleaseChunkData();
            void           Resize(int iNewSize);
            virtual ~Chunk();
        protected:
            uint32_t      ChunkID;
            uint32_t      CurrentChunkSize;             /* in bytes */
            uint32_t      NewChunkSize;                 /* in bytes (if chunk was scheduled to be resized) */
            List*         pParent;
            File*         pFile;
            unsigned long ulStartPos;           /* actual position in file where chunk (without header) starts */
            unsigned long ulPos;                /* # of bytes from ulStartPos */
            uint8_t*      pChunkData;
            unsigned long ulChunkDataSize;

            Chunk(File* pFile);
            Chunk(File* pFile, List* pParent, uint32_t uiChunkID, uint uiBodySize);
            void          ReadHeader(unsigned long fPos);
            void          WriteHeader(unsigned long fPos);
            unsigned long ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize);
            inline void   swapBytes_16(void* Word) {
                uint8_t byteCache = *((uint8_t*) Word);
                *((uint8_t*) Word)     = *((uint8_t*) Word + 1);
                *((uint8_t*) Word + 1) = byteCache;
            }
            inline void   swapBytes_32(void* Word) {
                uint8_t byteCache = *((uint8_t*) Word);
                *((uint8_t*) Word)     = *((uint8_t*) Word + 3);
                *((uint8_t*) Word + 3) = byteCache;
                byteCache = *((uint8_t*) Word + 1);
                *((uint8_t*) Word + 1) = *((uint8_t*) Word + 2);
                *((uint8_t*) Word + 2) = byteCache;
            }
            inline void   swapBytes(void* Word, unsigned long WordSize) {
                uint8_t byteCache;
                unsigned long lo = 0, hi = WordSize - 1;
                for (; lo < hi; hi--, lo++) {
                    byteCache = *((uint8_t*) Word + lo);
                    *((uint8_t*) Word + lo) = *((uint8_t*) Word + hi);
                    *((uint8_t*) Word + hi) = byteCache;
                }
            }
            inline String convertToString(uint32_t word) {
                String result;
                for (int i = 0; i < 4; i++) {
                    uint8_t byte = *((uint8_t*)(&word) + i);
                    char c = byte;
                    result += c;
                }
                return result;
            }
            virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
            virtual void __resetPos(); ///< Sets Chunk's read/write position to zero.

            friend class List;
    };

    /** @brief RIFF List Chunk
     *
     * Provides convenient methods to access data of RIFF list chunks and
     * their subchunks.
     */
    class List : public Chunk {
        public:
            List(File* pFile, unsigned long StartPos, List* Parent);
            String       GetListTypeString();
            uint32_t     GetListType() { return ListType; }   ///< Returns unsigned integer representation of the list's ID
            Chunk*       GetSubChunk(uint32_t ChunkID);
            List*        GetSubList(uint32_t ListType);
            Chunk*       GetFirstSubChunk();
            Chunk*       GetNextSubChunk();
            List*        GetFirstSubList();
            List*        GetNextSubList();
            unsigned int CountSubChunks();
            unsigned int CountSubChunks(uint32_t ChunkID);
            unsigned int CountSubLists();
            unsigned int CountSubLists(uint32_t ListType);
            Chunk*       AddSubChunk(uint32_t uiChunkID, uint uiBodySize);
            List*        AddSubList(uint32_t uiListType);
            void         DeleteSubChunk(Chunk* pSubChunk);
            void         MoveSubChunk(Chunk* pSrc, Chunk* pDst);
            virtual ~List();
        protected:
            typedef std::map<uint32_t, RIFF::Chunk*>  ChunkMap;
            typedef std::list<Chunk*>                 ChunkList;

            uint32_t   ListType;
            ChunkList* pSubChunks;
            ChunkMap*  pSubChunksMap;
            ChunkList::iterator ChunksIterator;
            ChunkList::iterator ListIterator;

            List(File* pFile);
            List(File* pFile, List* pParent, uint32_t uiListID);
            void ReadHeader(unsigned long fPos);
            void WriteHeader(unsigned long fPos);
            void LoadSubChunks();
            void LoadSubChunksRecursively();
            virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
            virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.
            void DeleteChunkList();
    };

    /** @brief RIFF File
     *
     * Handles arbitrary RIFF files and provides together with its base
     * classes convenient methods to walk through, read and modify the
     * file's RIFF tree.
     */
    class File : public List {
        public:
            File(uint32_t FileType);
            File(const String& path);
            stream_mode_t GetMode();
            bool          SetMode(stream_mode_t NewMode);
            void SetByteOrder(endian_t Endian);
            String GetFileName();
            virtual void Save();
            virtual void Save(const String& path);
            virtual ~File();
        protected:
            #if POSIX
            int    hFileRead;  ///< handle / descriptor for reading from file
            int    hFileWrite; ///< handle / descriptor for writing to (some) file
            #elif defined(WIN32)
            HANDLE hFileRead;  ///< handle / descriptor for reading from file
            HANDLE hFileWrite; ///< handle / descriptor for writing to (some) file
            #else
            FILE*  hFileRead;  ///< handle / descriptor for reading from file
            FILE*  hFileWrite; ///< handle / descriptor for writing to (some) file
            #endif // POSIX
            String Filename;
            bool   bEndianNative;

            void LogAsResized(Chunk* pResizedChunk);
            void UnlogResized(Chunk* pResizedChunk);
            friend class Chunk;
            friend class List;
        private:
            stream_mode_t  Mode;
            std::set<Chunk*> ResizedChunks; ///< All chunks which have been resized (enlarged / shortened).

            unsigned long GetFileSize();
            void ResizeFile(unsigned long ulNewSize);
            #if POSIX
            unsigned long __GetFileSize(int hFile);
            #elif defined(WIN32)
            unsigned long __GetFileSize(HANDLE hFile);
            #else
            unsigned long __GetFileSize(FILE* hFile);
            #endif
    };

    /**
     * Will be thrown whenever an error occurs while handling a RIFF file.
     */
    class Exception {
        public:
            String Message;

            Exception(String Message) { Exception::Message = Message; }
            void PrintMessage();
            virtual ~Exception() {}
    };

    String libraryName();
    String libraryVersion();

} // namespace RIFF
#endif // __RIFF_H__
1	/***************************************************************************
2	* *
3	* libgig - C++ cross-platform Gigasampler format file access library *
4	* *
5	* Copyright (C) 2003-2007 by Christian Schoenebeck *
6	* <cuse@users.sourceforge.net> *
7	* *
8	* This library is free software; you can redistribute it and/or modify *
9	* it under the terms of the GNU General Public License as published by *
10	* the Free Software Foundation; either version 2 of the License, or *
11	* (at your option) any later version. *
12	* *
13	* This library is distributed in the hope that it will be useful, *
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16	* GNU General Public License for more details. *
17	* *
18	* You should have received a copy of the GNU General Public License *
19	* along with this library; if not, write to the Free Software *
20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21	* MA 02111-1307 USA *
22	***************************************************************************/
23
24	#ifndef __RIFF_H__
25	#define __RIFF_H__
26
27	#ifdef WIN32
28	# define POSIX 0
29	#endif
30
31	#ifndef POSIX
32	# define POSIX 1
33	#endif
34
35	#ifndef DEBUG
36	# define DEBUG 0
37	#endif
38
39	#include <string>
40	#include <list>
41	#include <set>
42	#include <map>
43	#include <iostream>
44
45	#ifdef HAVE_CONFIG_H
46	# include <config.h>
47	#endif
48
49	#if POSIX
50	# include <sys/types.h>
51	# include <sys/stat.h>
52	# include <fcntl.h>
53	# include <unistd.h>
54	#endif // POSIX
55
56	#ifdef _MSC_VER
57	// Visual C++ 2008 doesn't have stdint.h
58	typedef __int8 int8_t;
59	typedef __int16 int16_t;
60	typedef __int32 int32_t;
61	typedef __int64 int64_t;
62	typedef unsigned __int8 uint8_t;
63	typedef unsigned __int16 uint16_t;
64	typedef unsigned __int32 uint32_t;
65	typedef unsigned __int64 uint64_t;
66	#else
67	#include <stdint.h>
68	#endif
69
70	#ifdef WIN32
71	# include <windows.h>
72	typedef unsigned int uint;
73	#endif // WIN32
74
75	#include <stdio.h>
76
77	#if WORDS_BIGENDIAN
78	# define CHUNK_ID_RIFF 0x52494646
79	# define CHUNK_ID_RIFX 0x52494658
80	# define CHUNK_ID_LIST 0x4C495354
81	#else // little endian
82	# define CHUNK_ID_RIFF 0x46464952
83	# define CHUNK_ID_RIFX 0x58464952
84	# define CHUNK_ID_LIST 0x5453494C
85	#endif // WORDS_BIGENDIAN
86
87	#define CHUNK_HEADER_SIZE 8
88	#define LIST_HEADER_SIZE 12
89	#define RIFF_HEADER_SIZE 12
90
91
92	/**
93	* @brief RIFF specific classes and definitions
94	*
95	* The Resource Interchange File Format (RIFF) is a generic tree-structured
96	* meta-format which stores data in so called "chunks". It can be compared
97	* to XML, but in contrast to XML, RIFF is entirely binary encoded, that is
98	* not ASCII based. RIFF is used as basis for many file formats like AVI,
99	* WAV, DLS and of course the Gigasampler file format. ;-)
100	*
101	* RIFF chunks can be seen as containers for data. There are two distinct
102	* types of chunks:
103	*
104	* - @e ordinary @e chunks are the leafs of the data tree which encapsulate
105	* the actual data of the file (i.e. the sample data of a .wav file)
106	*
107	* - @e list @e chunks are the nodes of the data tree which hold an
108	* arbitrary amount of subchunks (can be both, list chunks and/or ordinary
109	* chunks)
110	*/
111	namespace RIFF {
112
113	/* just symbol prototyping */
114	class Chunk;
115	class List;
116	class File;
117
118	typedef std::string String;
119
120	/** Whether file stream is open in read or in read/write mode. */
121	typedef enum {
122	stream_mode_read = 0,
123	stream_mode_read_write = 1,
124	stream_mode_closed = 2
125	} stream_mode_t;
126
127	/** Current state of the file stream. */
128	typedef enum {
129	stream_ready = 0,
130	stream_end_reached = 1,
131	stream_closed = 2
132	} stream_state_t;
133
134	/** File stream position dependent to these relations. */
135	typedef enum {
136	stream_start = 0,
137	stream_curpos = 1,
138	stream_backward = 2,
139	stream_end = 3
140	} stream_whence_t;
141
142	/** Alignment of data bytes in memory (system dependant). */
143	typedef enum {
144	endian_little = 0,
145	endian_big = 1,
146	endian_native = 2
147	} endian_t;
148
149	/** @brief Ordinary RIFF Chunk
150	*
151	* Provides convenient methods to access data of ordinary RIFF chunks
152	* in general.
153	*/
154	class Chunk {
155	public:
156	Chunk(File* pFile, unsigned long StartPos, List* Parent);
157	String GetChunkIDString();
158	uint32_t GetChunkID() { return ChunkID; } ///< Chunk ID in unsigned integer representation.
159	List* GetParent() { return pParent; } ///< Returns pointer to the chunk's parent list chunk.
160	unsigned long GetSize() { return CurrentChunkSize; } ///< Chunk size in bytes (without header, thus the chunk data body)
161	unsigned long GetNewSize() { return NewChunkSize; } ///< New chunk size if it was modified with Resize().
162	unsigned long GetPos() { return ulPos; } ///< Position within the chunk data body
163	unsigned long GetFilePos() { return ulStartPos + ulPos; } ///< Current, actual offset in file.
164	unsigned long SetPos(unsigned long Where, stream_whence_t Whence = stream_start);
165	unsigned long RemainingBytes();
166	stream_state_t GetState();
167	unsigned long Read(void* pData, unsigned long WordCount, unsigned long WordSize);
168	unsigned long ReadInt8(int8_t* pData, unsigned long WordCount = 1);
169	unsigned long ReadUint8(uint8_t* pData, unsigned long WordCount = 1);
170	unsigned long ReadInt16(int16_t* pData, unsigned long WordCount = 1);
171	unsigned long ReadUint16(uint16_t* pData, unsigned long WordCount = 1);
172	unsigned long ReadInt32(int32_t* pData, unsigned long WordCount = 1);
173	unsigned long ReadUint32(uint32_t* pData, unsigned long WordCount = 1);
174	int8_t ReadInt8();
175	uint8_t ReadUint8();
176	int16_t ReadInt16();
177	uint16_t ReadUint16();
178	int32_t ReadInt32();
179	uint32_t ReadUint32();
180	unsigned long Write(void* pData, unsigned long WordCount, unsigned long WordSize);
181	unsigned long WriteInt8(int8_t* pData, unsigned long WordCount = 1);
182	unsigned long WriteUint8(uint8_t* pData, unsigned long WordCount = 1);
183	unsigned long WriteInt16(int16_t* pData, unsigned long WordCount = 1);
184	unsigned long WriteUint16(uint16_t* pData, unsigned long WordCount = 1);
185	unsigned long WriteInt32(int32_t* pData, unsigned long WordCount = 1);
186	unsigned long WriteUint32(uint32_t* pData, unsigned long WordCount = 1);
187	void* LoadChunkData();
188	void ReleaseChunkData();
189	void Resize(int iNewSize);
190	virtual ~Chunk();
191	protected:
192	uint32_t ChunkID;
193	uint32_t CurrentChunkSize; /* in bytes */
194	uint32_t NewChunkSize; /* in bytes (if chunk was scheduled to be resized) */
195	List* pParent;
196	File* pFile;
197	unsigned long ulStartPos; /* actual position in file where chunk (without header) starts */
198	unsigned long ulPos; /* # of bytes from ulStartPos */
199	uint8_t* pChunkData;
200	unsigned long ulChunkDataSize;
201
202	Chunk(File* pFile);
203	Chunk(File* pFile, List* pParent, uint32_t uiChunkID, uint uiBodySize);
204	void ReadHeader(unsigned long fPos);
205	void WriteHeader(unsigned long fPos);
206	unsigned long ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize);
207	inline void swapBytes_16(void* Word) {
208	uint8_t byteCache = ((uint8_t) Word);
209	((uint8_t) Word) = ((uint8_t) Word + 1);
210	((uint8_t) Word + 1) = byteCache;
211	}
212	inline void swapBytes_32(void* Word) {
213	uint8_t byteCache = ((uint8_t) Word);
214	((uint8_t) Word) = ((uint8_t) Word + 3);
215	((uint8_t) Word + 3) = byteCache;
216	byteCache = ((uint8_t) Word + 1);
217	((uint8_t) Word + 1) = ((uint8_t) Word + 2);
218	((uint8_t) Word + 2) = byteCache;
219	}
220	inline void swapBytes(void* Word, unsigned long WordSize) {
221	uint8_t byteCache;
222	unsigned long lo = 0, hi = WordSize - 1;
223	for (; lo < hi; hi--, lo++) {
224	byteCache = ((uint8_t) Word + lo);
225	((uint8_t) Word + lo) = ((uint8_t) Word + hi);
226	((uint8_t) Word + hi) = byteCache;
227	}
228	}
229	inline String convertToString(uint32_t word) {
230	String result;
231	for (int i = 0; i < 4; i++) {
232	uint8_t byte = ((uint8_t)(&word) + i);
233	char c = byte;
234	result += c;
235	}
236	return result;
237	}
238	virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
239	virtual void __resetPos(); ///< Sets Chunk's read/write position to zero.
240
241	friend class List;
242	};
243
244	/** @brief RIFF List Chunk
245	*
246	* Provides convenient methods to access data of RIFF list chunks and
247	* their subchunks.
248	*/
249	class List : public Chunk {
250	public:
251	List(File* pFile, unsigned long StartPos, List* Parent);
252	String GetListTypeString();
253	uint32_t GetListType() { return ListType; } ///< Returns unsigned integer representation of the list's ID
254	Chunk* GetSubChunk(uint32_t ChunkID);
255	List* GetSubList(uint32_t ListType);
256	Chunk* GetFirstSubChunk();
257	Chunk* GetNextSubChunk();
258	List* GetFirstSubList();
259	List* GetNextSubList();
260	unsigned int CountSubChunks();
261	unsigned int CountSubChunks(uint32_t ChunkID);
262	unsigned int CountSubLists();
263	unsigned int CountSubLists(uint32_t ListType);
264	Chunk* AddSubChunk(uint32_t uiChunkID, uint uiBodySize);
265	List* AddSubList(uint32_t uiListType);
266	void DeleteSubChunk(Chunk* pSubChunk);
267	void MoveSubChunk(Chunk* pSrc, Chunk* pDst);
268	virtual ~List();
269	protected:
270	typedef std::map<uint32_t, RIFF::Chunk*> ChunkMap;
271	typedef std::list<Chunk*> ChunkList;
272
273	uint32_t ListType;
274	ChunkList* pSubChunks;
275	ChunkMap* pSubChunksMap;
276	ChunkList::iterator ChunksIterator;
277	ChunkList::iterator ListIterator;
278
279	List(File* pFile);
280	List(File* pFile, List* pParent, uint32_t uiListID);
281	void ReadHeader(unsigned long fPos);
282	void WriteHeader(unsigned long fPos);
283	void LoadSubChunks();
284	void LoadSubChunksRecursively();
285	virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
286	virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.
287	void DeleteChunkList();
288	};
289
290	/** @brief RIFF File
291	*
292	* Handles arbitrary RIFF files and provides together with its base
293	* classes convenient methods to walk through, read and modify the
294	* file's RIFF tree.
295	*/
296	class File : public List {
297	public:
298	File(uint32_t FileType);
299	File(const String& path);
300	stream_mode_t GetMode();
301	bool SetMode(stream_mode_t NewMode);
302	void SetByteOrder(endian_t Endian);
303	String GetFileName();
304	virtual void Save();
305	virtual void Save(const String& path);
306	virtual ~File();
307	protected:
308	#if POSIX
309	int hFileRead; ///< handle / descriptor for reading from file
310	int hFileWrite; ///< handle / descriptor for writing to (some) file
311	#elif defined(WIN32)
312	HANDLE hFileRead; ///< handle / descriptor for reading from file
313	HANDLE hFileWrite; ///< handle / descriptor for writing to (some) file
314	#else
315	FILE* hFileRead; ///< handle / descriptor for reading from file
316	FILE* hFileWrite; ///< handle / descriptor for writing to (some) file
317	#endif // POSIX
318	String Filename;
319	bool bEndianNative;
320
321	void LogAsResized(Chunk* pResizedChunk);
322	void UnlogResized(Chunk* pResizedChunk);
323	friend class Chunk;
324	friend class List;
325	private:
326	stream_mode_t Mode;
327	std::set<Chunk*> ResizedChunks; ///< All chunks which have been resized (enlarged / shortened).
328
329	unsigned long GetFileSize();
330	void ResizeFile(unsigned long ulNewSize);
331	#if POSIX
332	unsigned long __GetFileSize(int hFile);
333	#elif defined(WIN32)
334	unsigned long __GetFileSize(HANDLE hFile);
335	#else
336	unsigned long __GetFileSize(FILE* hFile);
337	#endif
338	};
339
340	/**
341	* Will be thrown whenever an error occurs while handling a RIFF file.
342	*/
343	class Exception {
344	public:
345	String Message;
346
347	Exception(String Message) { Exception::Message = Message; }
348	void PrintMessage();
349	virtual ~Exception() {}
350	};
351
352	String libraryName();
353	String libraryVersion();
354
355	} // namespace RIFF
356	#endif // __RIFF_H__