/[svn]/libgig/trunk/src/RIFF.h
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revision 2543 by schoenebeck, Sat May 10 02:06:58 2014 UTC revision 3920 by schoenebeck, Sun Jun 13 15:56:31 2021 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   libgig - C++ cross-platform Gigasampler format file access library    *   *   libgig - C++ cross-platform Gigasampler format file access library    *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003-2014 by Christian Schoenebeck                      *   *   Copyright (C) 2003-2021 by Christian Schoenebeck                      *
6   *                              <cuse@users.sourceforge.net>               *   *                              <cuse@users.sourceforge.net>               *
7   *                                                                         *   *                                                                         *
8   *   This library is free software; you can redistribute it and/or modify  *   *   This library is free software; you can redistribute it and/or modify  *
# Line 36  Line 36 
36  # define DEBUG 0  # define DEBUG 0
37  #endif  #endif
38    
39    #ifndef OVERRIDE
40    # if defined(__cplusplus) && __cplusplus >= 201103L
41    #  define OVERRIDE override
42    # else
43    #  define OVERRIDE
44    # endif
45    #endif
46    
47    #ifdef __GNUC__
48    # define LIBGIG_DEPRECATED(msg) __attribute__ ((deprecated(msg)))
49    #else
50    # define LIBGIG_DEPRECATED
51    #endif
52    
53  #include <string>  #include <string>
54  #include <list>  #include <list>
55  #include <map>  #include <map>
56    #include <set>
57    #include <vector>
58  #include <iostream>  #include <iostream>
59    #include <stdarg.h>
60    #include <thread>
61    #include <mutex>
62    
63  #ifdef HAVE_CONFIG_H  #ifdef HAVE_CONFIG_H
64  # include <config.h>  # include <config.h>
# Line 52  Line 71 
71  # include <unistd.h>  # include <unistd.h>
72  #endif // POSIX  #endif // POSIX
73    
74  #ifdef _MSC_VER  #if defined _MSC_VER && _MSC_VER < 1600
75  // Visual C++ 2008 doesn't have stdint.h  // Visual C++ 2008 doesn't have stdint.h
76  typedef __int8 int8_t;  typedef __int8 int8_t;
77  typedef __int16 int16_t;  typedef __int16 int16_t;
# Line 67  typedef unsigned __int64 uint64_t; Line 86  typedef unsigned __int64 uint64_t;
86  #endif  #endif
87    
88  #ifdef WIN32  #ifdef WIN32
89    # if (_WIN32 && !_WIN64) || (__GNUC__ && !(__x86_64__ || __ppc64__)) /* if 32 bit windows compilation */
90    #  if _WIN32_WINNT < 0x0501
91    #   undef _WIN32_WINNT
92    #   define _WIN32_WINNT 0x0501 /* Win XP (no service pack): required for 32 bit compilation for GetFileSizeEx() to be declared by windows.h */
93    #  endif
94    # endif
95  # include <windows.h>  # include <windows.h>
96    typedef unsigned int   uint;    typedef unsigned int   uint;
97  #endif // WIN32  #endif // WIN32
# Line 107  typedef unsigned __int64 uint64_t; Line 132  typedef unsigned __int64 uint64_t;
132    
133  #endif // WORDS_BIGENDIAN  #endif // WORDS_BIGENDIAN
134    
135  #define CHUNK_HEADER_SIZE       8  #define CHUNK_HEADER_SIZE(fileOffsetSize)   (4 + fileOffsetSize)
136  #define LIST_HEADER_SIZE        12  #define LIST_HEADER_SIZE(fileOffsetSize)    (8 + fileOffsetSize)
137  #define RIFF_HEADER_SIZE        12  #define RIFF_HEADER_SIZE(fileOffsetSize)    (8 + fileOffsetSize)
   
138    
139  /**  /**
140   * @brief RIFF specific classes and definitions   * @brief RIFF specific classes and definitions
# Line 140  namespace RIFF { Line 164  namespace RIFF {
164    
165      typedef std::string String;      typedef std::string String;
166    
167        /** Type used by libgig for handling file positioning during file I/O tasks. */
168        typedef uint64_t file_offset_t;
169    
170      /** Whether file stream is open in read or in read/write mode. */      /** Whether file stream is open in read or in read/write mode. */
171      typedef enum {      enum stream_mode_t {
172          stream_mode_read       = 0,          stream_mode_read       = 0,
173          stream_mode_read_write = 1,          stream_mode_read_write = 1,
174          stream_mode_closed     = 2          stream_mode_closed     = 2
175      } stream_mode_t;      };
176    
177      /** Current state of the file stream. */      /** Current state of the file stream. */
178      typedef enum {      enum stream_state_t {
179          stream_ready       = 0,          stream_ready       = 0,
180          stream_end_reached = 1,          stream_end_reached = 1,
181          stream_closed      = 2          stream_closed      = 2
182      } stream_state_t;      };
183    
184      /** File stream position dependent to these relations. */      /** File stream position dependent to these relations. */
185      typedef enum {      enum stream_whence_t {
186          stream_start    = 0,          stream_start    = 0,
187          stream_curpos   = 1,          stream_curpos   = 1,
188          stream_backward = 2,          stream_backward = 2,
189          stream_end      = 3          stream_end      = 3
190      } stream_whence_t;      };
191    
192      /** Alignment of data bytes in memory (system dependant). */      /** Alignment of data bytes in memory (system dependant). */
193      typedef enum {      enum endian_t {
194          endian_little = 0,          endian_little = 0,
195          endian_big    = 1,          endian_big    = 1,
196          endian_native = 2          endian_native = 2
197      } endian_t;      };
198    
199      /** General chunk structure of a file. */      /** General RIFF chunk structure of a RIFF file. */
200      enum layout_t {      enum layout_t {
201          layout_standard = 0, ///< Standard RIFF file layout: First chunk in file is a List chunk which contains all other chunks and there are no chunks outside the scope of that very first (List) chunk.          layout_standard = 0, ///< Standard RIFF file layout: First chunk in file is a List chunk which contains all other chunks and there are no chunks outside the scope of that very first (List) chunk.
202          layout_flat     = 1  ///< Not a "real" RIFF file: First chunk in file is an ordinary data chunk, not a List chunk, and there might be other chunks after that first chunk.          layout_flat     = 1  ///< Not a "real" RIFF file: First chunk in file is an ordinary data chunk, not a List chunk, and there might be other chunks after that first chunk.
203      };      };
204    
205        /** Size of RIFF file offsets used in all RIFF chunks' headers. @see File::GetFileOffsetSize() */
206        enum offset_size_t {
207            offset_size_auto  = 0, ///< Use 32 bit offsets for files smaller than 4 GB, use 64 bit offsets for files equal or larger than 4 GB.
208            offset_size_32bit = 4, ///< Always use 32 bit offsets (even for files larger than 4 GB).
209            offset_size_64bit = 8  ///< Always use 64 bit offsets (even for files smaller than 4 GB).
210        };
211    
212        /**
213         * @brief Used for indicating the progress of a certain task.
214         *
215         * The function pointer argument has to be supplied with a valid
216         * function of the given signature which will then be called on
217         * progress changes. An equivalent progress_t structure will be passed
218         * back as argument to the callback function on each progress change.
219         * The factor field of the supplied progress_t structure will then
220         * reflect the current progress as value between 0.0 and 1.0. You might
221         * want to use the custom field for data needed in your callback
222         * function.
223         */
224        struct progress_t {
225            void (*callback)(progress_t*); ///< Callback function pointer which has to be assigned to a function for progress notification.
226            float factor;                  ///< Reflects current progress as value between 0.0 and 1.0.
227            void* custom;                  ///< This pointer can be used for arbitrary data.
228            float __range_min;             ///< Only for internal usage, do not modify!
229            float __range_max;             ///< Only for internal usage, do not modify!
230            progress_t();
231            std::vector<progress_t> subdivide(int iSubtasks);
232            std::vector<progress_t> subdivide(std::vector<float> vSubTaskPortions);
233        };
234    
235      /** @brief Ordinary RIFF Chunk      /** @brief Ordinary RIFF Chunk
236       *       *
237       * Provides convenient methods to access data of ordinary RIFF chunks       * Provides convenient methods to access data of ordinary RIFF chunks
# Line 182  namespace RIFF { Line 239  namespace RIFF {
239       */       */
240      class Chunk {      class Chunk {
241          public:          public:
242              Chunk(File* pFile, unsigned long StartPos, List* Parent);              Chunk(File* pFile, file_offset_t StartPos, List* Parent);
243              String         GetChunkIDString();              String         GetChunkIDString() const;
244              uint32_t       GetChunkID() { return ChunkID; }             ///< Chunk ID in unsigned integer representation.              uint32_t       GetChunkID() const { return ChunkID; }       ///< Chunk ID in unsigned integer representation.
245              File*          GetFile()    { return pFile;   }             ///< Returns pointer to the chunk's File object.              File*          GetFile() const    { return pFile;   }       ///< Returns pointer to the chunk's File object.
246              List*          GetParent()  { return pParent; }             ///< Returns pointer to the chunk's parent list chunk.              List*          GetParent() const  { return pParent; }       ///< Returns pointer to the chunk's parent list chunk.
247              unsigned long  GetSize() const { return CurrentChunkSize; } ///< Chunk size in bytes (without header, thus the chunk data body)              file_offset_t  GetSize() const { return ullCurrentChunkSize; } ///< Chunk size in bytes (without header, thus the chunk data body)
248              unsigned long  GetNewSize() { return NewChunkSize;     }    ///< New chunk size if it was modified with Resize().              file_offset_t  GetNewSize() const { return ullNewChunkSize; } ///< New chunk size if it was modified with Resize(), otherwise value returned will be equal to GetSize().
249              unsigned long  GetPos()     { return ulPos; }               ///< Position within the chunk data body              file_offset_t  GetPos() const;
250              unsigned long  GetFilePos() { return ulStartPos + ulPos; }  ///< Current, actual offset in file.              file_offset_t  GetFilePos() const;
251              unsigned long  SetPos(unsigned long Where, stream_whence_t Whence = stream_start);              file_offset_t  SetPos(file_offset_t Where, stream_whence_t Whence = stream_start);
252              unsigned long  RemainingBytes();              file_offset_t  RemainingBytes() const;
253              stream_state_t GetState();              stream_state_t GetState() const;
254              unsigned long  Read(void* pData, unsigned long WordCount, unsigned long WordSize);              file_offset_t  Read(void* pData, file_offset_t WordCount, file_offset_t WordSize);
255              unsigned long  ReadInt8(int8_t* pData,     unsigned long WordCount = 1);              file_offset_t  ReadInt8(int8_t* pData,     file_offset_t WordCount = 1);
256              unsigned long  ReadUint8(uint8_t* pData,   unsigned long WordCount = 1);              file_offset_t  ReadUint8(uint8_t* pData,   file_offset_t WordCount = 1);
257              unsigned long  ReadInt16(int16_t* pData,   unsigned long WordCount = 1);              file_offset_t  ReadInt16(int16_t* pData,   file_offset_t WordCount = 1);
258              unsigned long  ReadUint16(uint16_t* pData, unsigned long WordCount = 1);              file_offset_t  ReadUint16(uint16_t* pData, file_offset_t WordCount = 1);
259              unsigned long  ReadInt32(int32_t* pData,   unsigned long WordCount = 1);              file_offset_t  ReadInt32(int32_t* pData,   file_offset_t WordCount = 1);
260              unsigned long  ReadUint32(uint32_t* pData, unsigned long WordCount = 1);              file_offset_t  ReadUint32(uint32_t* pData, file_offset_t WordCount = 1);
261              int8_t         ReadInt8();              int8_t         ReadInt8();
262              uint8_t        ReadUint8();              uint8_t        ReadUint8();
263              int16_t        ReadInt16();              int16_t        ReadInt16();
# Line 208  namespace RIFF { Line 265  namespace RIFF {
265              int32_t        ReadInt32();              int32_t        ReadInt32();
266              uint32_t       ReadUint32();              uint32_t       ReadUint32();
267              void           ReadString(String& s, int size);              void           ReadString(String& s, int size);
268              unsigned long  Write(void* pData, unsigned long WordCount, unsigned long WordSize);              file_offset_t  Write(void* pData, file_offset_t WordCount, file_offset_t WordSize);
269              unsigned long  WriteInt8(int8_t* pData,     unsigned long WordCount = 1);              file_offset_t  WriteInt8(int8_t* pData,     file_offset_t WordCount = 1);
270              unsigned long  WriteUint8(uint8_t* pData,   unsigned long WordCount = 1);              file_offset_t  WriteUint8(uint8_t* pData,   file_offset_t WordCount = 1);
271              unsigned long  WriteInt16(int16_t* pData,   unsigned long WordCount = 1);              file_offset_t  WriteInt16(int16_t* pData,   file_offset_t WordCount = 1);
272              unsigned long  WriteUint16(uint16_t* pData, unsigned long WordCount = 1);              file_offset_t  WriteUint16(uint16_t* pData, file_offset_t WordCount = 1);
273              unsigned long  WriteInt32(int32_t* pData,   unsigned long WordCount = 1);              file_offset_t  WriteInt32(int32_t* pData,   file_offset_t WordCount = 1);
274              unsigned long  WriteUint32(uint32_t* pData, unsigned long WordCount = 1);              file_offset_t  WriteUint32(uint32_t* pData, file_offset_t WordCount = 1);
275              void*          LoadChunkData();              void*          LoadChunkData();
276              void           ReleaseChunkData();              void           ReleaseChunkData();
277              void           Resize(int iNewSize);              void           Resize(file_offset_t NewSize);
278              virtual ~Chunk();              virtual ~Chunk();
279          protected:          protected:
280              uint32_t      ChunkID;              uint32_t      ChunkID;
281              uint32_t      CurrentChunkSize;             /* in bytes */              file_offset_t ullCurrentChunkSize;          /* in bytes */
282              uint32_t      NewChunkSize;                 /* in bytes (if chunk was scheduled to be resized) */              file_offset_t ullNewChunkSize;                      /* in bytes (if chunk was scheduled to be resized) */
283              List*         pParent;              List*         pParent;
284              File*         pFile;              File*         pFile;
285              unsigned long ulStartPos;           /* actual position in file where chunk (without header) starts */              file_offset_t ullStartPos;  /* actual position in file where chunk data (without header) starts */
             unsigned long ulPos;                /* # of bytes from ulStartPos */  
286              uint8_t*      pChunkData;              uint8_t*      pChunkData;
287              unsigned long ulChunkDataSize;              file_offset_t ullChunkDataSize;
288                struct ChunkPos { /* current read/write position as # of bytes from ulStartPos */
289                    file_offset_t ullPos; /* used if File::IsIOPerThread() is false (default) */
290                    mutable std::map<std::thread::id,file_offset_t> byThread; /* used if File::IsIOPerThread() is true */
291                    mutable std::mutex mutex; /* for protecting concurrent changes on byThread map itself */
292                } chunkPos;
293    
294              Chunk(File* pFile);              Chunk(File* pFile);
295              Chunk(File* pFile, List* pParent, uint32_t uiChunkID, uint uiBodySize);              Chunk(File* pFile, List* pParent, uint32_t uiChunkID, file_offset_t ullBodySize);
296              void          ReadHeader(unsigned long fPos);              void ReadHeader(file_offset_t filePos);
297              void          WriteHeader(unsigned long fPos);              void WriteHeader(file_offset_t filePos);
298              unsigned long ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize);              file_offset_t ReadSceptical(void* pData, file_offset_t WordCount, file_offset_t WordSize);
299              inline void   swapBytes_16(void* Word) {              inline static String convertToString(uint32_t 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) {  
300                  String result;                  String result;
301                  for (int i = 0; i < 4; i++) {                  for (int i = 0; i < 4; i++) {
302                      uint8_t byte = *((uint8_t*)(&word) + i);                      uint8_t byte = *((uint8_t*)(&word) + i);
# Line 266  namespace RIFF { Line 305  namespace RIFF {
305                  }                  }
306                  return result;                  return result;
307              }              }
308              virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);              virtual file_offset_t RequiredPhysicalSize(int fileOffsetSize);
309                virtual file_offset_t WriteChunk(file_offset_t ullWritePos, file_offset_t ullCurrentDataOffset, progress_t* pProgress = NULL);
310              virtual void __resetPos(); ///< Sets Chunk's read/write position to zero.              virtual void __resetPos(); ///< Sets Chunk's read/write position to zero.
311    
312              friend class List;              friend class List;
313            private:
314                file_offset_t& GetPosUnsafeRef();
315      };      };
316    
317      /** @brief RIFF List Chunk      /** @brief RIFF List Chunk
# Line 279  namespace RIFF { Line 321  namespace RIFF {
321       */       */
322      class List : public Chunk {      class List : public Chunk {
323          public:          public:
324              List(File* pFile, unsigned long StartPos, List* Parent);              List(File* pFile, file_offset_t StartPos, List* Parent);
325              String       GetListTypeString();              String       GetListTypeString() const;
326              uint32_t     GetListType() { return ListType; }   ///< Returns unsigned integer representation of the list's ID              uint32_t     GetListType() const { return ListType; } ///< Returns unsigned integer representation of the list's ID
327                Chunk*       GetSubChunkAt(size_t pos);
328              Chunk*       GetSubChunk(uint32_t ChunkID);              Chunk*       GetSubChunk(uint32_t ChunkID);
329                List*        GetSubListAt(size_t pos);
330              List*        GetSubList(uint32_t ListType);              List*        GetSubList(uint32_t ListType);
331              Chunk*       GetFirstSubChunk();              Chunk*       GetFirstSubChunk() LIBGIG_DEPRECATED("Use GetSubChunkAt() instead.");
332              Chunk*       GetNextSubChunk();              Chunk*       GetNextSubChunk() LIBGIG_DEPRECATED("Use GetSubChunkAt() instead.");
333              List*        GetFirstSubList();              List*        GetFirstSubList() LIBGIG_DEPRECATED("Use GetSubListAt() instead.");
334              List*        GetNextSubList();              List*        GetNextSubList() LIBGIG_DEPRECATED("Use GetSubListAt() instead.");
335              unsigned int CountSubChunks();              size_t       CountSubChunks();
336              unsigned int CountSubChunks(uint32_t ChunkID);              size_t       CountSubChunks(uint32_t ChunkID);
337              unsigned int CountSubLists();              size_t       CountSubLists();
338              unsigned int CountSubLists(uint32_t ListType);              size_t       CountSubLists(uint32_t ListType);
339              Chunk*       AddSubChunk(uint32_t uiChunkID, uint uiBodySize);              Chunk*       AddSubChunk(uint32_t uiChunkID, file_offset_t ullBodySize);
340              List*        AddSubList(uint32_t uiListType);              List*        AddSubList(uint32_t uiListType);
341              void         DeleteSubChunk(Chunk* pSubChunk);              void         DeleteSubChunk(Chunk* pSubChunk);
342              void         MoveSubChunk(Chunk* pSrc, Chunk* pDst);              void         MoveSubChunk(Chunk* pSrc, Chunk* pDst); // read API doc comments !!!
343                void         MoveSubChunk(Chunk* pSrc, List* pNewParent);
344              virtual ~List();              virtual ~List();
345          protected:          protected:
346              typedef std::map<uint32_t, RIFF::Chunk*>  ChunkMap;              typedef std::map<uint32_t, RIFF::Chunk*>  ChunkMap;
347              typedef std::list<Chunk*>                 ChunkList;              typedef std::vector<Chunk*>               ChunkList;
348                typedef std::set<Chunk*>                  ChunkSet;
349    
350              uint32_t   ListType;              uint32_t   ListType;
351              ChunkList* pSubChunks;              ChunkList* pSubChunks;
# Line 309  namespace RIFF { Line 355  namespace RIFF {
355    
356              List(File* pFile);              List(File* pFile);
357              List(File* pFile, List* pParent, uint32_t uiListID);              List(File* pFile, List* pParent, uint32_t uiListID);
358              void ReadHeader(unsigned long fPos);              void ReadHeader(file_offset_t filePos);
359              void WriteHeader(unsigned long fPos);              void WriteHeader(file_offset_t filePos);
360              void LoadSubChunks();              void LoadSubChunks(progress_t* pProgress = NULL);
361              void LoadSubChunksRecursively();              void LoadSubChunksRecursively(progress_t* pProgress = NULL);
362              virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);              virtual file_offset_t RequiredPhysicalSize(int fileOffsetSize);
363                virtual file_offset_t WriteChunk(file_offset_t ullWritePos, file_offset_t ullCurrentDataOffset, progress_t* pProgress = NULL);
364              virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.              virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.
365              void DeleteChunkList();              void DeleteChunkList();
366      };      };
# Line 326  namespace RIFF { Line 373  namespace RIFF {
373       */       */
374      class File : public List {      class File : public List {
375          public:          public:
376                /**
377                 * OS dependent type serving as file handle / descriptor for OS
378                 * dependent file I/O operations.
379                 */
380                #if POSIX
381                typedef int Handle;
382                #elif defined(WIN32)
383                typedef HANDLE Handle;
384                #else
385                typedef FILE* Handle;
386                #endif
387    
388              File(uint32_t FileType);              File(uint32_t FileType);
389              File(const String& path);              File(const String& path);
390              File(const String& path, uint32_t FileType, endian_t Endian, layout_t layout);              File(const String& path, uint32_t FileType, endian_t Endian, layout_t layout, offset_size_t fileOffsetSize = offset_size_auto);
391              stream_mode_t GetMode();              stream_mode_t GetMode() const;
392              bool          SetMode(stream_mode_t NewMode);              bool          SetMode(stream_mode_t NewMode);
393              void SetByteOrder(endian_t Endian);              void SetByteOrder(endian_t Endian);
394              String GetFileName();              String GetFileName() const;
395              void SetFileName(const String& path);              void SetFileName(const String& path);
396                Handle FileHandle() const;
397              bool IsNew() const;              bool IsNew() const;
398              layout_t GetLayout() const;              layout_t GetLayout() const;
399              virtual void Save();              file_offset_t GetCurrentFileSize() const;
400              virtual void Save(const String& path);              file_offset_t GetRequiredFileSize();
401                file_offset_t GetRequiredFileSize(offset_size_t fileOffsetSize);
402                int GetFileOffsetSize() const;
403                int GetRequiredFileOffsetSize();
404                bool IsIOPerThread() const;
405                void SetIOPerThread(bool enable);
406    
407                virtual void Save(progress_t* pProgress = NULL);
408                virtual void Save(const String& path, progress_t* pProgress = NULL);
409              virtual ~File();              virtual ~File();
410          protected:          protected:
411              #if POSIX              struct HandlePair {
412              int    hFileRead;  ///< handle / descriptor for reading from file                  Handle hRead;  ///< handle / descriptor for reading from file
413              int    hFileWrite; ///< handle / descriptor for writing to (some) file                  Handle hWrite; ///< handle / descriptor for writing to (some) file
414              #elif defined(WIN32)                  stream_mode_t Mode; ///< State of handles (ro, rw, closed).
415              HANDLE hFileRead;  ///< handle / descriptor for reading from file              };
416              HANDLE hFileWrite; ///< handle / descriptor for writing to (some) file              struct IO : HandlePair {
417              #else                  bool isPerThread; ///< Whether SetIOPerThread(true) was called.
418              FILE*  hFileRead;  ///< handle / descriptor for reading from file                  mutable std::map<std::thread::id,HandlePair> byThread; ///< Optional: Individual file handle pair for each thread separately.
419              FILE*  hFileWrite; ///< handle / descriptor for writing to (some) file                  mutable std::mutex mutex; ///< For protecting concurrent changes on the @c byThread map itself and replacing handles.
420              #endif // POSIX              } io;
421              String Filename;              String Filename;
422              bool   bEndianNative;              bool   bEndianNative;
423              bool   bIsNewFile;              bool   bIsNewFile;
424              layout_t Layout; ///< An ordinary RIFF file is always set to layout_standard.              layout_t Layout; ///< An ordinary RIFF file is always set to layout_standard.
425                offset_size_t FileOffsetPreference;
426                int FileOffsetSize; ///< Size of file offsets (in bytes) when this file was opened (or saved the last time).
427    
428                Handle FileWriteHandle() const;
429                HandlePair FileHandlePair() const;
430    
             void LogAsResized(Chunk* pResizedChunk);  
             void UnlogResized(Chunk* pResizedChunk);  
431              friend class Chunk;              friend class Chunk;
432              friend class List;              friend class List;
433          private:          private:
             stream_mode_t  Mode;  
             ChunkList ResizedChunks; ///< All chunks which have been resized (enlarged / shortened).  
   
434              void __openExistingFile(const String& path, uint32_t* FileType = NULL);              void __openExistingFile(const String& path, uint32_t* FileType = NULL);
435              unsigned long GetFileSize();              void ResizeFile(file_offset_t ullNewSize);
             void ResizeFile(unsigned long ulNewSize);  
436              #if POSIX              #if POSIX
437              unsigned long __GetFileSize(int hFile);              file_offset_t __GetFileSize(int hFile) const;
438              #elif defined(WIN32)              #elif defined(WIN32)
439              unsigned long __GetFileSize(HANDLE hFile);              file_offset_t __GetFileSize(HANDLE hFile) const;
440              #else              #else
441              unsigned long __GetFileSize(FILE* hFile);              file_offset_t __GetFileSize(FILE* hFile) const;
442              #endif              #endif
443                int FileOffsetSizeFor(file_offset_t fileSize) const;
444              void Cleanup();              void Cleanup();
445                HandlePair& FileHandlePairUnsafeRef();
446                bool SetModeInternal(stream_mode_t NewMode, bool* pResetPos);
447      };      };
448    
449      /**      /**
# Line 383  namespace RIFF { Line 453  namespace RIFF {
453          public:          public:
454              String Message;              String Message;
455    
456              Exception(String Message) { Exception::Message = Message; }              Exception(String format, ...);
457                Exception(String format, va_list arg);
458              void PrintMessage();              void PrintMessage();
459              virtual ~Exception() {}              virtual ~Exception() {}
460    
461            protected:
462                Exception();
463                static String assemble(String format, va_list arg);
464      };      };
465    
466      String libraryName();      String libraryName();
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