/[svn]/libgig/trunk/src/RIFF.cpp
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revision 24 by schoenebeck, Fri Dec 26 16:15:31 2003 UTC revision 1713 by persson, Thu Mar 6 20:42:22 2008 UTC
# Line 1  Line 1 
1  /***************************************************************************  /***************************************************************************
2   *                                                                         *   *                                                                         *
3   *   libgig - C++ cross-platform Gigasampler format file loader library    *   *   libgig - C++ cross-platform Gigasampler format file access library    *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003 by Christian Schoenebeck                           *   *   Copyright (C) 2003-2007 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  *
9   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 20  Line 20 
20   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
21   *   MA  02111-1307  USA                                                   *   *   MA  02111-1307  USA                                                   *
22   ***************************************************************************/   ***************************************************************************/
23  #if 1  
24    #include <algorithm>
25    #include <string.h>
26    
27  #include "RIFF.h"  #include "RIFF.h"
28    
29    #include "helper.h"
30    
31  namespace RIFF {  namespace RIFF {
32    
33    // *************** Internal functions **************
34    // *
35    
36        /// Returns a human readable path of the given chunk.
37        static String __resolveChunkPath(Chunk* pCk) {
38            String sPath;
39            for (Chunk* pChunk = pCk; pChunk; pChunk = pChunk->GetParent()) {
40                if (pChunk->GetChunkID() == CHUNK_ID_LIST) {
41                    List* pList = (List*) pChunk;
42                    sPath = "->'" + pList->GetListTypeString() + "'" + sPath;
43                } else {
44                    sPath = "->'" + pChunk->GetChunkIDString() + "'" + sPath;
45                }
46            }
47            return sPath;
48        }
49    
50    
51    
52  // *************** Chunk **************  // *************** Chunk **************
53  // *  // *
54    
55      Chunk::Chunk() {      Chunk::Chunk(File* pFile) {
56          #if DEBUG          #if DEBUG
57          std::cout << "Chunk::Chunk()" << std::endl;          std::cout << "Chunk::Chunk(File* pFile)" << std::endl;
58          #endif // DEBUG          #endif // DEBUG
59          ulPos      = 0;          ulPos      = 0;
60          pParent    = NULL;          pParent    = NULL;
61          pChunkData = NULL;          pChunkData = NULL;
62            ulChunkDataSize = 0;
63            ChunkID    = CHUNK_ID_RIFF;
64            this->pFile = pFile;
65      }      }
66    
67      #if POSIX      Chunk::Chunk(File* pFile, unsigned long StartPos, List* Parent) {
     Chunk::Chunk(int hFile, unsigned long StartPos, bool EndianNative, List* Parent) {  
     #else  
     Chunk::Chunk(FILE* hFile, unsigned long StartPos, bool EndianNative, List* Parent) {  
     #endif // POSIX  
68          #if DEBUG          #if DEBUG
69          std::cout << "Chunk::Chunk(FILE,ulong,bool,List*),StartPos=" << StartPos << std::endl;          std::cout << "Chunk::Chunk(File*,ulong,bool,List*),StartPos=" << StartPos << std::endl;
70          #endif // DEBUG          #endif // DEBUG
71          Chunk::hFile  = hFile;          this->pFile   = pFile;
72          ulStartPos    = StartPos + CHUNK_HEADER_SIZE;          ulStartPos    = StartPos + CHUNK_HEADER_SIZE;
         bEndianNative = EndianNative;  
73          pParent       = Parent;          pParent       = Parent;
74          ulPos         = 0;          ulPos         = 0;
75          pChunkData    = NULL;          pChunkData    = NULL;
76            ulChunkDataSize = 0;
77          ReadHeader(StartPos);          ReadHeader(StartPos);
78      }      }
79    
80        Chunk::Chunk(File* pFile, List* pParent, uint32_t uiChunkID, uint uiBodySize) {
81            this->pFile      = pFile;
82            ulStartPos       = 0; // arbitrary usually, since it will be updated when we write the chunk
83            this->pParent    = pParent;
84            ulPos            = 0;
85            pChunkData       = NULL;
86            ulChunkDataSize  = 0;
87            ChunkID          = uiChunkID;
88            CurrentChunkSize = 0;
89            NewChunkSize     = uiBodySize;
90        }
91    
92      Chunk::~Chunk() {      Chunk::~Chunk() {
93            pFile->UnlogResized(this);
94          if (pChunkData) delete[] pChunkData;          if (pChunkData) delete[] pChunkData;
95      }      }
96    
# Line 63  namespace RIFF { Line 99  namespace RIFF {
99          std::cout << "Chunk::Readheader(" << fPos << ") ";          std::cout << "Chunk::Readheader(" << fPos << ") ";
100          #endif // DEBUG          #endif // DEBUG
101          #if POSIX          #if POSIX
102          if (lseek(hFile, fPos, SEEK_SET) != -1) {          if (lseek(pFile->hFileRead, fPos, SEEK_SET) != -1) {
103              read(hFile, &ChunkID, 4);              read(pFile->hFileRead, &ChunkID, 4);
104              read(hFile, &ChunkSize, 4);              read(pFile->hFileRead, &CurrentChunkSize, 4);
105          #else          #elif defined(WIN32)
106          if (!fseek(hFile, fPos, SEEK_SET)) {          if (SetFilePointer(pFile->hFileRead, fPos, NULL/*32 bit*/, FILE_BEGIN) != INVALID_SET_FILE_POINTER) {
107              fread(&ChunkID, 4, 1, hFile);              DWORD dwBytesRead;
108              fread(&ChunkSize, 4, 1, hFile);              ReadFile(pFile->hFileRead, &ChunkID, 4, &dwBytesRead, NULL);
109                ReadFile(pFile->hFileRead, &CurrentChunkSize, 4, &dwBytesRead, NULL);
110            #else
111            if (!fseek(pFile->hFileRead, fPos, SEEK_SET)) {
112                fread(&ChunkID, 4, 1, pFile->hFileRead);
113                fread(&CurrentChunkSize, 4, 1, pFile->hFileRead);
114          #endif // POSIX          #endif // POSIX
115              #if WORDS_BIGENDIAN              #if WORDS_BIGENDIAN
116              if (ChunkID == CHUNK_ID_RIFF) {              if (ChunkID == CHUNK_ID_RIFF) {
117                  bEndianNative = false;                  pFile->bEndianNative = false;
118              }              }
119              #else // little endian              #else // little endian
120              if (ChunkID == CHUNK_ID_RIFX) {              if (ChunkID == CHUNK_ID_RIFX) {
121                  bEndianNative = false;                  pFile->bEndianNative = false;
122                  ChunkID = CHUNK_ID_RIFF;                  ChunkID = CHUNK_ID_RIFF;
123              }              }
124              #endif // WORDS_BIGENDIAN              #endif // WORDS_BIGENDIAN
125              if (!bEndianNative) {              if (!pFile->bEndianNative) {
126                  //swapBytes_32(&ChunkID);                  //swapBytes_32(&ChunkID);
127                  swapBytes_32(&ChunkSize);                  swapBytes_32(&CurrentChunkSize);
128              }              }
129              #if DEBUG              #if DEBUG
130              std::cout << "ckID=" << convertToString(ChunkID) << " ";              std::cout << "ckID=" << convertToString(ChunkID) << " ";
131              std::cout << "ckSize=" << ChunkSize << " ";              std::cout << "ckSize=" << ChunkSize << " ";
132              std::cout << "bEndianNative=" << bEndianNative << std::endl;              std::cout << "bEndianNative=" << bEndianNative << std::endl;
133              #endif // DEBUG              #endif // DEBUG
134                NewChunkSize = CurrentChunkSize;
135          }          }
136      }      }
137    
138        void Chunk::WriteHeader(unsigned long fPos) {
139            uint32_t uiNewChunkID = ChunkID;
140            if (ChunkID == CHUNK_ID_RIFF) {
141                #if WORDS_BIGENDIAN
142                if (pFile->bEndianNative) uiNewChunkID = CHUNK_ID_RIFX;
143                #else // little endian
144                if (!pFile->bEndianNative) uiNewChunkID = CHUNK_ID_RIFX;
145                #endif // WORDS_BIGENDIAN
146            }
147    
148            uint32_t uiNewChunkSize = NewChunkSize;
149            if (!pFile->bEndianNative) {
150                swapBytes_32(&uiNewChunkSize);
151            }
152    
153            #if POSIX
154            if (lseek(pFile->hFileWrite, fPos, SEEK_SET) != -1) {
155                write(pFile->hFileWrite, &uiNewChunkID, 4);
156                write(pFile->hFileWrite, &uiNewChunkSize, 4);
157            }
158            #elif defined(WIN32)
159            if (SetFilePointer(pFile->hFileWrite, fPos, NULL/*32 bit*/, FILE_BEGIN) != INVALID_SET_FILE_POINTER) {
160                DWORD dwBytesWritten;
161                WriteFile(pFile->hFileWrite, &uiNewChunkID, 4, &dwBytesWritten, NULL);
162                WriteFile(pFile->hFileWrite, &uiNewChunkSize, 4, &dwBytesWritten, NULL);
163            }
164            #else
165            if (!fseek(pFile->hFileWrite, fPos, SEEK_SET)) {
166                fwrite(&uiNewChunkID, 4, 1, pFile->hFileWrite);
167                fwrite(&uiNewChunkSize, 4, 1, pFile->hFileWrite);
168            }
169            #endif // POSIX
170        }
171    
172      /**      /**
173       *  Returns the String representation of the chunk's ID (e.g. "RIFF",       *  Returns the String representation of the chunk's ID (e.g. "RIFF",
174       *  "LIST").       *  "LIST").
# Line 105  namespace RIFF { Line 181  namespace RIFF {
181       *  Sets the position within the chunk body, thus within the data portion       *  Sets the position within the chunk body, thus within the data portion
182       *  of the chunk (in bytes).       *  of the chunk (in bytes).
183       *       *
184         *  <b>Caution:</b> the position will be reset to zero whenever
185         *  File::Save() was called.
186         *
187       *  @param Where  - position offset (in bytes)       *  @param Where  - position offset (in bytes)
188       *  @param Whence - optional: defines to what <i>\a Where</i> relates to,       *  @param Whence - optional: defines to what <i>\a Where</i> relates to,
189       *                  if omitted \a Where relates to beginning of the chunk       *                  if omitted \a Where relates to beginning of the chunk
# Line 119  namespace RIFF { Line 198  namespace RIFF {
198                  ulPos += Where;                  ulPos += Where;
199                  break;                  break;
200              case stream_end:              case stream_end:
201                  ulPos = ChunkSize - 1 - Where;                  ulPos = CurrentChunkSize - 1 - Where;
202                  break;                  break;
203              case stream_backward:              case stream_backward:
204                  ulPos -= Where;                  ulPos -= Where;
# Line 128  namespace RIFF { Line 207  namespace RIFF {
207                  ulPos = Where;                  ulPos = Where;
208                  break;                  break;
209          }          }
210          if (ulPos > ChunkSize) ulPos = ChunkSize;          if (ulPos > CurrentChunkSize) ulPos = CurrentChunkSize;
211          return ulPos;          return ulPos;
212      }      }
213    
# Line 144  namespace RIFF { Line 223  namespace RIFF {
223       */       */
224      unsigned long Chunk::RemainingBytes() {      unsigned long Chunk::RemainingBytes() {
225         #if DEBUG         #if DEBUG
226         std::cout << "Chunk::Remainingbytes()=" << ChunkSize - ulPos << std::endl;         std::cout << "Chunk::Remainingbytes()=" << CurrentChunkSize - ulPos << std::endl;
227         #endif // DEBUG         #endif // DEBUG
228          return ChunkSize - ulPos;          return CurrentChunkSize - ulPos;
229      }      }
230    
231      /**      /**
# Line 157  namespace RIFF { Line 236  namespace RIFF {
236       *  - RIFF::stream_closed :       *  - RIFF::stream_closed :
237       *    the data stream was closed somehow, no more reading possible       *    the data stream was closed somehow, no more reading possible
238       *  - RIFF::stream_end_reached :       *  - RIFF::stream_end_reached :
239       *    alreaady reached the end of the chunk data, no more reading       *    already reached the end of the chunk data, no more reading
240       *    possible without SetPos()       *    possible without SetPos()
241       */       */
242      stream_state_t Chunk::GetState() {      stream_state_t Chunk::GetState() {
# Line 165  namespace RIFF { Line 244  namespace RIFF {
244        std::cout << "Chunk::GetState()" << std::endl;        std::cout << "Chunk::GetState()" << std::endl;
245        #endif // DEBUG        #endif // DEBUG
246          #if POSIX          #if POSIX
247          if (hFile == 0)        return stream_closed;          if (pFile->hFileRead == 0) return stream_closed;
248            #elif defined (WIN32)
249            if (pFile->hFileRead == INVALID_HANDLE_VALUE)
250                return stream_closed;
251          #else          #else
252          if (hFile == NULL)     return stream_closed;          if (pFile->hFileRead == NULL) return stream_closed;
253          #endif // POSIX          #endif // POSIX
254          if (ulPos < ChunkSize) return stream_ready;          if (ulPos < CurrentChunkSize) return stream_ready;
255          else                   return stream_end_reached;          else                          return stream_end_reached;
256      }      }
257    
258      /**      /**
# Line 192  namespace RIFF { Line 274  namespace RIFF {
274         #if DEBUG         #if DEBUG
275         std::cout << "Chunk::Read(void*,ulong,ulong)" << std::endl;         std::cout << "Chunk::Read(void*,ulong,ulong)" << std::endl;
276         #endif // DEBUG         #endif // DEBUG
277          if (ulPos >= ChunkSize) return 0;          if (ulPos >= CurrentChunkSize) return 0;
278          if (ulPos + WordCount * WordSize >= ChunkSize) WordCount = (ChunkSize - ulPos) / WordSize;          if (ulPos + WordCount * WordSize >= CurrentChunkSize) WordCount = (CurrentChunkSize - ulPos) / WordSize;
279          #if POSIX          #if POSIX
280          if (lseek(hFile, ulStartPos + ulPos, SEEK_SET) < 0) return 0;          if (lseek(pFile->hFileRead, ulStartPos + ulPos, SEEK_SET) < 0) return 0;
281          unsigned long readWords = read(hFile, pData, WordCount * WordSize);          unsigned long readWords = read(pFile->hFileRead, pData, WordCount * WordSize);
282            if (readWords < 1) return 0;
283            readWords /= WordSize;
284            #elif defined(WIN32)
285            if (SetFilePointer(pFile->hFileRead, ulStartPos + ulPos, NULL/*32 bit*/, FILE_BEGIN) == INVALID_SET_FILE_POINTER) return 0;
286            DWORD readWords;
287            ReadFile(pFile->hFileRead, pData, WordCount * WordSize, &readWords, NULL);
288          if (readWords < 1) return 0;          if (readWords < 1) return 0;
289          readWords /= WordSize;          readWords /= WordSize;
290          #else // standard C functions          #else // standard C functions
291          if (fseek(hFile, ulStartPos + ulPos, SEEK_SET)) return 0;          if (fseek(pFile->hFileRead, ulStartPos + ulPos, SEEK_SET)) return 0;
292          unsigned long readWords = fread(pData, WordSize, WordCount, hFile);          unsigned long readWords = fread(pData, WordSize, WordCount, pFile->hFileRead);
293          #endif // POSIX          #endif // POSIX
294          if (!bEndianNative && WordSize != 1) {          if (!pFile->bEndianNative && WordSize != 1) {
295              switch (WordSize) {              switch (WordSize) {
296                  case 2:                  case 2:
297                      for (unsigned long iWord = 0; iWord < readWords; iWord++)                      for (unsigned long iWord = 0; iWord < readWords; iWord++)
# Line 223  namespace RIFF { Line 311  namespace RIFF {
311          return readWords;          return readWords;
312      }      }
313    
314        /**
315         *  Writes \a WordCount number of data words with given \a WordSize from
316         *  the buffer pointed by \a pData. Be sure to provide the correct
317         *  \a WordSize, as this will be important and taken into account for
318         *  eventual endian correction (swapping of bytes due to different
319         *  native byte order of a system). The position within the chunk will
320         *  automatically be incremented.
321         *
322         *  @param pData      source buffer (containing the data)
323         *  @param WordCount  number of data words to write
324         *  @param WordSize   size of each data word to write
325         *  @returns          number of successfully written data words
326         *  @throws RIFF::Exception  if write operation would exceed current
327         *                           chunk size or any IO error occured
328         *  @see Resize()
329         */
330        unsigned long Chunk::Write(void* pData, unsigned long WordCount, unsigned long WordSize) {
331            if (pFile->Mode != stream_mode_read_write)
332                throw Exception("Cannot write data to chunk, file has to be opened in read+write mode first");
333            if (ulPos >= CurrentChunkSize || ulPos + WordCount * WordSize > CurrentChunkSize)
334                throw Exception("End of chunk reached while trying to write data");
335            if (!pFile->bEndianNative && WordSize != 1) {
336                switch (WordSize) {
337                    case 2:
338                        for (unsigned long iWord = 0; iWord < WordCount; iWord++)
339                            swapBytes_16((uint16_t*) pData + iWord);
340                        break;
341                    case 4:
342                        for (unsigned long iWord = 0; iWord < WordCount; iWord++)
343                            swapBytes_32((uint32_t*) pData + iWord);
344                        break;
345                    default:
346                        for (unsigned long iWord = 0; iWord < WordCount; iWord++)
347                            swapBytes((uint8_t*) pData + iWord * WordSize, WordSize);
348                        break;
349                }
350            }
351            #if POSIX
352            if (lseek(pFile->hFileWrite, ulStartPos + ulPos, SEEK_SET) < 0) {
353                throw Exception("Could not seek to position " + ToString(ulPos) +
354                                " in chunk (" + ToString(ulStartPos + ulPos) + " in file)");
355            }
356            unsigned long writtenWords = write(pFile->hFileWrite, pData, WordCount * WordSize);
357            if (writtenWords < 1) throw Exception("POSIX IO Error while trying to write chunk data");
358            writtenWords /= WordSize;
359            #elif defined(WIN32)
360            if (SetFilePointer(pFile->hFileWrite, ulStartPos + ulPos, NULL/*32 bit*/, FILE_BEGIN) == INVALID_SET_FILE_POINTER) {
361                throw Exception("Could not seek to position " + ToString(ulPos) +
362                                " in chunk (" + ToString(ulStartPos + ulPos) + " in file)");
363            }
364            DWORD writtenWords;
365            WriteFile(pFile->hFileWrite, pData, WordCount * WordSize, &writtenWords, NULL);
366            if (writtenWords < 1) throw Exception("Windows IO Error while trying to write chunk data");
367            writtenWords /= WordSize;
368            #else // standard C functions
369            if (fseek(pFile->hFileWrite, ulStartPos + ulPos, SEEK_SET)) {
370                throw Exception("Could not seek to position " + ToString(ulPos) +
371                                " in chunk (" + ToString(ulStartPos + ulPos) + " in file)");
372            }
373            unsigned long writtenWords = fwrite(pData, WordSize, WordCount, pFile->hFileWrite);
374            #endif // POSIX
375            SetPos(writtenWords * WordSize, stream_curpos);
376            return writtenWords;
377        }
378    
379      /** Just an internal wrapper for the main <i>Read()</i> method with additional Exception throwing on errors. */      /** Just an internal wrapper for the main <i>Read()</i> method with additional Exception throwing on errors. */
380      unsigned long Chunk::ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize) {      unsigned long Chunk::ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize) {
381          unsigned long readWords = Read(pData, WordCount, WordSize);          unsigned long readWords = Read(pData, WordCount, WordSize);
# Line 249  namespace RIFF { Line 402  namespace RIFF {
402      }      }
403    
404      /**      /**
405         * Writes \a WordCount number of 8 Bit signed integer words from the
406         * buffer pointed by \a pData to the chunk's body, directly to the
407         * actual "physical" file. The position within the chunk will
408         * automatically be incremented. Note: you cannot write beyond the
409         * boundaries of the chunk, to append data to the chunk call Resize()
410         * before.
411         *
412         * @param pData             source buffer (containing the data)
413         * @param WordCount         number of 8 Bit signed integers to write
414         * @returns                 number of written integers
415         * @throws RIFF::Exception  if an IO error occured
416         * @see Resize()
417         */
418        unsigned long Chunk::WriteInt8(int8_t* pData, unsigned long WordCount) {
419            return Write(pData, WordCount, 1);
420        }
421    
422        /**
423       * Reads \a WordCount number of 8 Bit unsigned integer words and copies       * Reads \a WordCount number of 8 Bit unsigned integer words and copies
424       * it into the buffer pointed by \a pData. The buffer has to be       * it into the buffer pointed by \a pData. The buffer has to be
425       * allocated. The position within the chunk will automatically be       * allocated. The position within the chunk will automatically be
# Line 268  namespace RIFF { Line 439  namespace RIFF {
439      }      }
440    
441      /**      /**
442         * Writes \a WordCount number of 8 Bit unsigned integer words from the
443         * buffer pointed by \a pData to the chunk's body, directly to the
444         * actual "physical" file. The position within the chunk will
445         * automatically be incremented. Note: you cannot write beyond the
446         * boundaries of the chunk, to append data to the chunk call Resize()
447         * before.
448         *
449         * @param pData             source buffer (containing the data)
450         * @param WordCount         number of 8 Bit unsigned integers to write
451         * @returns                 number of written integers
452         * @throws RIFF::Exception  if an IO error occured
453         * @see Resize()
454         */
455        unsigned long Chunk::WriteUint8(uint8_t* pData, unsigned long WordCount) {
456            return Write(pData, WordCount, 1);
457        }
458    
459        /**
460       * Reads \a WordCount number of 16 Bit signed integer words and copies       * Reads \a WordCount number of 16 Bit signed integer words and copies
461       * it into the buffer pointed by \a pData. The buffer has to be       * it into the buffer pointed by \a pData. The buffer has to be
462       * allocated. Endian correction will automatically be done if needed.       * allocated. Endian correction will automatically be done if needed.
# Line 287  namespace RIFF { Line 476  namespace RIFF {
476      }      }
477    
478      /**      /**
479         * Writes \a WordCount number of 16 Bit signed integer words from the
480         * buffer pointed by \a pData to the chunk's body, directly to the
481         * actual "physical" file. The position within the chunk will
482         * automatically be incremented. Note: you cannot write beyond the
483         * boundaries of the chunk, to append data to the chunk call Resize()
484         * before.
485         *
486         * @param pData             source buffer (containing the data)
487         * @param WordCount         number of 16 Bit signed integers to write
488         * @returns                 number of written integers
489         * @throws RIFF::Exception  if an IO error occured
490         * @see Resize()
491         */
492        unsigned long Chunk::WriteInt16(int16_t* pData, unsigned long WordCount) {
493            return Write(pData, WordCount, 2);
494        }
495    
496        /**
497       * Reads \a WordCount number of 16 Bit unsigned integer words and copies       * Reads \a WordCount number of 16 Bit unsigned integer words and copies
498       * it into the buffer pointed by \a pData. The buffer has to be       * it into the buffer pointed by \a pData. The buffer has to be
499       * allocated. Endian correction will automatically be done if needed.       * allocated. Endian correction will automatically be done if needed.
# Line 306  namespace RIFF { Line 513  namespace RIFF {
513      }      }
514    
515      /**      /**
516         * Writes \a WordCount number of 16 Bit unsigned integer words from the
517         * buffer pointed by \a pData to the chunk's body, directly to the
518         * actual "physical" file. The position within the chunk will
519         * automatically be incremented. Note: you cannot write beyond the
520         * boundaries of the chunk, to append data to the chunk call Resize()
521         * before.
522         *
523         * @param pData             source buffer (containing the data)
524         * @param WordCount         number of 16 Bit unsigned integers to write
525         * @returns                 number of written integers
526         * @throws RIFF::Exception  if an IO error occured
527         * @see Resize()
528         */
529        unsigned long Chunk::WriteUint16(uint16_t* pData, unsigned long WordCount) {
530            return Write(pData, WordCount, 2);
531        }
532    
533        /**
534       * Reads \a WordCount number of 32 Bit signed integer words and copies       * Reads \a WordCount number of 32 Bit signed integer words and copies
535       * it into the buffer pointed by \a pData. The buffer has to be       * it into the buffer pointed by \a pData. The buffer has to be
536       * allocated. Endian correction will automatically be done if needed.       * allocated. Endian correction will automatically be done if needed.
# Line 325  namespace RIFF { Line 550  namespace RIFF {
550      }      }
551    
552      /**      /**
553         * Writes \a WordCount number of 32 Bit signed integer words from the
554         * buffer pointed by \a pData to the chunk's body, directly to the
555         * actual "physical" file. The position within the chunk will
556         * automatically be incremented. Note: you cannot write beyond the
557         * boundaries of the chunk, to append data to the chunk call Resize()
558         * before.
559         *
560         * @param pData             source buffer (containing the data)
561         * @param WordCount         number of 32 Bit signed integers to write
562         * @returns                 number of written integers
563         * @throws RIFF::Exception  if an IO error occured
564         * @see Resize()
565         */
566        unsigned long Chunk::WriteInt32(int32_t* pData, unsigned long WordCount) {
567            return Write(pData, WordCount, 4);
568        }
569    
570        /**
571       * Reads \a WordCount number of 32 Bit unsigned integer words and copies       * Reads \a WordCount number of 32 Bit unsigned integer words and copies
572       * it into the buffer pointed by \a pData. The buffer has to be       * it into the buffer pointed by \a pData. The buffer has to be
573       * allocated. Endian correction will automatically be done if needed.       * allocated. Endian correction will automatically be done if needed.
# Line 344  namespace RIFF { Line 587  namespace RIFF {
587      }      }
588    
589      /**      /**
590         * Writes \a WordCount number of 32 Bit unsigned integer words from the
591         * buffer pointed by \a pData to the chunk's body, directly to the
592         * actual "physical" file. The position within the chunk will
593         * automatically be incremented. Note: you cannot write beyond the
594         * boundaries of the chunk, to append data to the chunk call Resize()
595         * before.
596         *
597         * @param pData             source buffer (containing the data)
598         * @param WordCount         number of 32 Bit unsigned integers to write
599         * @returns                 number of written integers
600         * @throws RIFF::Exception  if an IO error occured
601         * @see Resize()
602         */
603        unsigned long Chunk::WriteUint32(uint32_t* pData, unsigned long WordCount) {
604            return Write(pData, WordCount, 4);
605        }
606    
607        /**
608       * Reads one 8 Bit signed integer word and increments the position within       * Reads one 8 Bit signed integer word and increments the position within
609       * the chunk.       * the chunk.
610       *       *
# Line 443  namespace RIFF { Line 704  namespace RIFF {
704          return word;          return word;
705      }      }
706    
707        /** @brief Load chunk body into RAM.
708         *
709         * Loads the whole chunk body into memory. You can modify the data in
710         * RAM and save the data by calling File::Save() afterwards.
711         *
712         * <b>Caution:</b> the buffer pointer will be invalidated once
713         * File::Save() was called. You have to call LoadChunkData() again to
714         * get a new, valid pointer whenever File::Save() was called.
715         *
716         * You can call LoadChunkData() again if you previously scheduled to
717         * enlarge this chunk with a Resize() call. In that case the buffer will
718         * be enlarged to the new, scheduled chunk size and you can already
719         * place the new chunk data to the buffer and finally call File::Save()
720         * to enlarge the chunk physically and write the new data in one rush.
721         * This approach is definitely recommended if you have to enlarge and
722         * write new data to a lot of chunks.
723         *
724         * @returns a pointer to the data in RAM on success, NULL otherwise
725         * @throws Exception if data buffer could not be enlarged
726         * @see ReleaseChunkData()
727         */
728      void* Chunk::LoadChunkData() {      void* Chunk::LoadChunkData() {
729          if (!pChunkData) {          if (!pChunkData && pFile->Filename != "") {
730              #if POSIX              #if POSIX
731              if (lseek(hFile, ulStartPos, SEEK_SET) == -1) return NULL;              if (lseek(pFile->hFileRead, ulStartPos, SEEK_SET) == -1) return NULL;
732              pChunkData = new uint8_t[GetSize()];              #elif defined(WIN32)
733              if (!pChunkData) return NULL;              if (SetFilePointer(pFile->hFileRead, ulStartPos, NULL/*32 bit*/, FILE_BEGIN) == INVALID_SET_FILE_POINTER) return NULL;
             unsigned long readWords = read(hFile, pChunkData, GetSize());  
734              #else              #else
735              if (fseek(hFile, ulStartPos, SEEK_SET)) return NULL;              if (fseek(pFile->hFileRead, ulStartPos, SEEK_SET)) return NULL;
736              pChunkData = new uint8_t[GetSize()];              #endif // POSIX
737                unsigned long ulBufferSize = (CurrentChunkSize > NewChunkSize) ? CurrentChunkSize : NewChunkSize;
738                pChunkData = new uint8_t[ulBufferSize];
739              if (!pChunkData) return NULL;              if (!pChunkData) return NULL;
740              unsigned long readWords = fread(pChunkData, 1, GetSize(), hFile);              memset(pChunkData, 0, ulBufferSize);
741                #if POSIX
742                unsigned long readWords = read(pFile->hFileRead, pChunkData, GetSize());
743                #elif defined(WIN32)
744                DWORD readWords;
745                ReadFile(pFile->hFileRead, pChunkData, GetSize(), &readWords, NULL);
746                #else
747                unsigned long readWords = fread(pChunkData, 1, GetSize(), pFile->hFileRead);
748              #endif // POSIX              #endif // POSIX
749              if (readWords != GetSize()) {              if (readWords != GetSize()) {
750                  delete[] pChunkData;                  delete[] pChunkData;
751                  return (pChunkData = NULL);                  return (pChunkData = NULL);
752              }              }
753                ulChunkDataSize = ulBufferSize;
754            } else if (NewChunkSize > ulChunkDataSize) {
755                uint8_t* pNewBuffer = new uint8_t[NewChunkSize];
756                if (!pNewBuffer) throw Exception("Could not enlarge chunk data buffer to " + ToString(NewChunkSize) + " bytes");
757                memset(pNewBuffer, 0 , NewChunkSize);
758                memcpy(pNewBuffer, pChunkData, ulChunkDataSize);
759                delete[] pChunkData;
760                pChunkData      = pNewBuffer;
761                ulChunkDataSize = NewChunkSize;
762          }          }
763          return pChunkData;          return pChunkData;
764      }      }
765    
766        /** @brief Free loaded chunk body from RAM.
767         *
768         * Frees loaded chunk body data from memory (RAM). You should call
769         * File::Save() before calling this method if you modified the data to
770         * make the changes persistent.
771         */
772      void Chunk::ReleaseChunkData() {      void Chunk::ReleaseChunkData() {
773          if (pChunkData) {          if (pChunkData) {
774              delete[] pChunkData;              delete[] pChunkData;
# Line 471  namespace RIFF { Line 776  namespace RIFF {
776          }          }
777      }      }
778    
779        /** @brief Resize chunk.
780         *
781         * Resizes this chunk's body, that is the actual size of data possible
782         * to be written to this chunk. This call will return immediately and
783         * just schedule the resize operation. You should call File::Save() to
784         * actually perform the resize operation(s) "physically" to the file.
785         * As this can take a while on large files, it is recommended to call
786         * Resize() first on all chunks which have to be resized and finally to
787         * call File::Save() to perform all those resize operations in one rush.
788         *
789         * <b>Caution:</b> You cannot directly write to enlarged chunks before
790         * calling File::Save() as this might exceed the current chunk's body
791         * boundary!
792         *
793         * @param iNewSize - new chunk body size in bytes (must be greater than zero)
794         * @throws RIFF::Exception  if \a iNewSize is less than 1
795         * @see File::Save()
796         */
797        void Chunk::Resize(int iNewSize) {
798            if (iNewSize <= 0)
799                throw Exception("There is at least one empty chunk (zero size): " + __resolveChunkPath(this));
800            if (NewChunkSize == iNewSize) return;
801            NewChunkSize = iNewSize;
802            pFile->LogAsResized(this);
803        }
804    
805        /** @brief Write chunk persistently e.g. to disk.
806         *
807         * Stores the chunk persistently to its actual "physical" file.
808         *
809         * @param ulWritePos - position within the "physical" file where this
810         *                     chunk should be written to
811         * @param ulCurrentDataOffset - offset of current (old) data within
812         *                              the file
813         * @returns new write position in the "physical" file, that is
814         *          \a ulWritePos incremented by this chunk's new size
815         *          (including its header size of course)
816         */
817        unsigned long Chunk::WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset) {
818            const unsigned long ulOriginalPos = ulWritePos;
819            ulWritePos += CHUNK_HEADER_SIZE;
820    
821            if (pFile->Mode != stream_mode_read_write)
822                throw Exception("Cannot write list chunk, file has to be opened in read+write mode");
823    
824            // if the whole chunk body was loaded into RAM
825            if (pChunkData) {
826                // make sure chunk data buffer in RAM is at least as large as the new chunk size
827                LoadChunkData();
828                // write chunk data from RAM persistently to the file
829                #if POSIX
830                lseek(pFile->hFileWrite, ulWritePos, SEEK_SET);
831                if (write(pFile->hFileWrite, pChunkData, NewChunkSize) != NewChunkSize) {
832                    throw Exception("Writing Chunk data (from RAM) failed");
833                }
834                #elif defined(WIN32)
835                SetFilePointer(pFile->hFileWrite, ulWritePos, NULL/*32 bit*/, FILE_BEGIN);
836                DWORD dwBytesWritten;
837                WriteFile(pFile->hFileWrite, pChunkData, NewChunkSize, &dwBytesWritten, NULL);
838                if (dwBytesWritten != NewChunkSize) {
839                    throw Exception("Writing Chunk data (from RAM) failed");
840                }
841                #else
842                fseek(pFile->hFileWrite, ulWritePos, SEEK_SET);
843                if (fwrite(pChunkData, 1, NewChunkSize, pFile->hFileWrite) != NewChunkSize) {
844                    throw Exception("Writing Chunk data (from RAM) failed");
845                }
846                #endif // POSIX
847            } else {
848                // move chunk data from the end of the file to the appropriate position
849                int8_t* pCopyBuffer = new int8_t[4096];
850                unsigned long ulToMove = (NewChunkSize < CurrentChunkSize) ? NewChunkSize : CurrentChunkSize;
851                #if defined(WIN32)
852                DWORD iBytesMoved = 1; // we have to pass it via pointer to the Windows API, thus the correct size must be ensured
853                #else
854                int iBytesMoved = 1;
855                #endif
856                for (unsigned long ulOffset = 0; iBytesMoved > 0; ulOffset += iBytesMoved, ulToMove -= iBytesMoved) {
857                    iBytesMoved = (ulToMove < 4096) ? ulToMove : 4096;
858                    #if POSIX
859                    lseek(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, SEEK_SET);
860                    iBytesMoved = read(pFile->hFileRead, pCopyBuffer, iBytesMoved);
861                    lseek(pFile->hFileWrite, ulWritePos + ulOffset, SEEK_SET);
862                    iBytesMoved = write(pFile->hFileWrite, pCopyBuffer, iBytesMoved);
863                    #elif defined(WIN32)
864                    SetFilePointer(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, NULL/*32 bit*/, FILE_BEGIN);
865                    ReadFile(pFile->hFileRead, pCopyBuffer, iBytesMoved, &iBytesMoved, NULL);
866                    SetFilePointer(pFile->hFileWrite, ulWritePos + ulOffset, NULL/*32 bit*/, FILE_BEGIN);
867                    WriteFile(pFile->hFileWrite, pCopyBuffer, iBytesMoved, &iBytesMoved, NULL);
868                    #else
869                    fseek(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, SEEK_SET);
870                    iBytesMoved = fread(pCopyBuffer, 1, iBytesMoved, pFile->hFileRead);
871                    fseek(pFile->hFileWrite, ulWritePos + ulOffset, SEEK_SET);
872                    iBytesMoved = fwrite(pCopyBuffer, 1, iBytesMoved, pFile->hFileWrite);
873                    #endif
874                }
875                delete[] pCopyBuffer;
876                if (iBytesMoved < 0) throw Exception("Writing Chunk data (from file) failed");
877            }
878    
879            // update this chunk's header
880            CurrentChunkSize = NewChunkSize;
881            WriteHeader(ulOriginalPos);
882    
883            // update chunk's position pointers
884            ulStartPos = ulOriginalPos + CHUNK_HEADER_SIZE;
885            ulPos      = 0;
886    
887            // add pad byte if needed
888            if ((ulStartPos + NewChunkSize) % 2 != 0) {
889                const char cPadByte = 0;
890                #if POSIX
891                lseek(pFile->hFileWrite, ulStartPos + NewChunkSize, SEEK_SET);
892                write(pFile->hFileWrite, &cPadByte, 1);
893                #elif defined(WIN32)
894                SetFilePointer(pFile->hFileWrite, ulStartPos + NewChunkSize, NULL/*32 bit*/, FILE_BEGIN);
895                DWORD dwBytesWritten;
896                WriteFile(pFile->hFileWrite, &cPadByte, 1, &dwBytesWritten, NULL);
897                #else
898                fseek(pFile->hFileWrite, ulStartPos + NewChunkSize, SEEK_SET);
899                fwrite(&cPadByte, 1, 1, pFile->hFileWrite);
900                #endif
901                return ulStartPos + NewChunkSize + 1;
902            }
903    
904            return ulStartPos + NewChunkSize;
905        }
906    
907        void Chunk::__resetPos() {
908            ulPos = 0;
909        }
910    
911    
912    
913  // *************** List ***************  // *************** List ***************
914  // *  // *
915    
916      List::List() : Chunk() {      List::List(File* pFile) : Chunk(pFile) {
917        #if DEBUG        #if DEBUG
918        std::cout << "List::List()" << std::endl;        std::cout << "List::List(File* pFile)" << std::endl;
919        #endif // DEBUG        #endif // DEBUG
920          pSubChunks    = NULL;          pSubChunks    = NULL;
921          pSubChunksMap = NULL;          pSubChunksMap = NULL;
922      }      }
923    
924      #if POSIX      List::List(File* pFile, unsigned long StartPos, List* Parent)
925      List::List(int hFile, unsigned long StartPos, bool EndianNative, List* Parent)        : Chunk(pFile, StartPos, Parent) {
     #else  
     List::List(FILE* hFile, unsigned long StartPos, bool EndianNative, List* Parent)  
     #endif // POSIX  
       : Chunk(hFile, StartPos, EndianNative, Parent) {  
926          #if DEBUG          #if DEBUG
927          std::cout << "List::List(FILE*,ulong,bool,List*)" << std::endl;          std::cout << "List::List(File*,ulong,bool,List*)" << std::endl;
928          #endif // DEBUG          #endif // DEBUG
929          pSubChunks    = NULL;          pSubChunks    = NULL;
930          pSubChunksMap = NULL;          pSubChunksMap = NULL;
# Line 499  namespace RIFF { Line 932  namespace RIFF {
932          ulStartPos    = StartPos + LIST_HEADER_SIZE;          ulStartPos    = StartPos + LIST_HEADER_SIZE;
933      }      }
934    
935        List::List(File* pFile, List* pParent, uint32_t uiListID)
936          : Chunk(pFile, pParent, CHUNK_ID_LIST, 0) {
937            pSubChunks    = NULL;
938            pSubChunksMap = NULL;
939            ListType      = uiListID;
940        }
941    
942      List::~List() {      List::~List() {
943        #if DEBUG        #if DEBUG
944        std::cout << "List::~List()" << std::endl;        std::cout << "List::~List()" << std::endl;
# Line 642  namespace RIFF { Line 1082  namespace RIFF {
1082      }      }
1083    
1084      /**      /**
1085       *  Returns number subchunks within the list.       *  Returns number of subchunks within the list.
1086       */       */
1087      unsigned int List::CountSubChunks() {      unsigned int List::CountSubChunks() {
1088          if (!pSubChunks) LoadSubChunks();          if (!pSubChunks) LoadSubChunks();
# Line 693  namespace RIFF { Line 1133  namespace RIFF {
1133          return result;          return result;
1134      }      }
1135    
1136        /** @brief Creates a new sub chunk.
1137         *
1138         * Creates and adds a new sub chunk to this list chunk. Note that the
1139         * chunk's body size given by \a uiBodySize must be greater than zero.
1140         * You have to call File::Save() to make this change persistent to the
1141         * actual file and <b>before</b> performing any data write operations
1142         * on the new chunk!
1143         *
1144         * @param uiChunkID  - chunk ID of the new chunk
1145         * @param uiBodySize - size of the new chunk's body, that is its actual
1146         *                     data size (without header)
1147         * @throws RIFF::Exception if \a uiBodySize equals zero
1148         */
1149        Chunk* List::AddSubChunk(uint32_t uiChunkID, uint uiBodySize) {
1150            if (uiBodySize == 0) throw Exception("Chunk body size must be at least 1 byte");
1151            if (!pSubChunks) LoadSubChunks();
1152            Chunk* pNewChunk = new Chunk(pFile, this, uiChunkID, 0);
1153            pSubChunks->push_back(pNewChunk);
1154            (*pSubChunksMap)[uiChunkID] = pNewChunk;
1155            pNewChunk->Resize(uiBodySize);
1156            NewChunkSize += CHUNK_HEADER_SIZE;
1157            pFile->LogAsResized(this);
1158            return pNewChunk;
1159        }
1160    
1161        /** @brief Moves a sub chunk.
1162         *
1163         * Moves a sub chunk from one position in a list to another
1164         * position in the same list. The pSrc chunk is placed before the
1165         * pDst chunk.
1166         *
1167         * @param pSrc - sub chunk to be moved
1168         * @param pDst - the position to move to. pSrc will be placed
1169         *               before pDst. If pDst is 0, pSrc will be placed
1170         *               last in list.
1171         */
1172        void List::MoveSubChunk(Chunk* pSrc, Chunk* pDst) {
1173            if (!pSubChunks) LoadSubChunks();
1174            pSubChunks->remove(pSrc);
1175            ChunkList::iterator iter = find(pSubChunks->begin(), pSubChunks->end(), pDst);
1176            pSubChunks->insert(iter, pSrc);
1177        }
1178    
1179        /** @brief Creates a new list sub chunk.
1180         *
1181         * Creates and adds a new list sub chunk to this list chunk. Note that
1182         * you have to add sub chunks / sub list chunks to the new created chunk
1183         * <b>before</b> trying to make this change persisten to the actual
1184         * file with File::Save()!
1185         *
1186         * @param uiListType - list ID of the new list chunk
1187         */
1188        List* List::AddSubList(uint32_t uiListType) {
1189            if (!pSubChunks) LoadSubChunks();
1190            List* pNewListChunk = new List(pFile, this, uiListType);
1191            pSubChunks->push_back(pNewListChunk);
1192            (*pSubChunksMap)[CHUNK_ID_LIST] = pNewListChunk;
1193            NewChunkSize += LIST_HEADER_SIZE;
1194            pFile->LogAsResized(this);
1195            return pNewListChunk;
1196        }
1197    
1198        /** @brief Removes a sub chunk.
1199         *
1200         * Removes the sub chunk given by \a pSubChunk from this list and frees
1201         * it completely from RAM. The given chunk can either be a normal sub
1202         * chunk or a list sub chunk. In case the given chunk is a list chunk,
1203         * all its subchunks (if any) will be removed recursively as well. You
1204         * should call File::Save() to make this change persistent at any time.
1205         *
1206         * @param pSubChunk - sub chunk or sub list chunk to be removed
1207         */
1208        void List::DeleteSubChunk(Chunk* pSubChunk) {
1209            if (!pSubChunks) LoadSubChunks();
1210            pSubChunks->remove(pSubChunk);
1211            if ((*pSubChunksMap)[pSubChunk->GetChunkID()] == pSubChunk) {
1212                pSubChunksMap->erase(pSubChunk->GetChunkID());
1213                // try to find another chunk of the same chunk ID
1214                ChunkList::iterator iter = pSubChunks->begin();
1215                ChunkList::iterator end  = pSubChunks->end();
1216                for (; iter != end; ++iter) {
1217                    if ((*iter)->GetChunkID() == pSubChunk->GetChunkID()) {
1218                        (*pSubChunksMap)[pSubChunk->GetChunkID()] = *iter;
1219                        break; // we're done, stop search
1220                    }
1221                }
1222            }
1223            delete pSubChunk;
1224        }
1225    
1226      void List::ReadHeader(unsigned long fPos) {      void List::ReadHeader(unsigned long fPos) {
1227        #if DEBUG        #if DEBUG
1228        std::cout << "List::Readheader(ulong) ";        std::cout << "List::Readheader(ulong) ";
1229        #endif // DEBUG        #endif // DEBUG
1230          Chunk::ReadHeader(fPos);          Chunk::ReadHeader(fPos);
1231          ChunkSize -= 4;          NewChunkSize = CurrentChunkSize -= 4;
1232          #if POSIX          #if POSIX
1233          lseek(hFile, fPos + CHUNK_HEADER_SIZE, SEEK_SET);          lseek(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
1234          read(hFile, &ListType, 4);          read(pFile->hFileRead, &ListType, 4);
1235            #elif defined(WIN32)
1236            SetFilePointer(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, NULL/*32 bit*/, FILE_BEGIN);
1237            DWORD dwBytesRead;
1238            ReadFile(pFile->hFileRead, &ListType, 4, &dwBytesRead, NULL);
1239          #else          #else
1240          fseek(hFile, fPos + CHUNK_HEADER_SIZE, SEEK_SET);          fseek(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
1241          fread(&ListType, 4, 1, hFile);          fread(&ListType, 4, 1, pFile->hFileRead);
1242          #endif // POSIX          #endif // POSIX
1243        #if DEBUG        #if DEBUG
1244        std::cout << "listType=" << convertToString(ListType) << std::endl;        std::cout << "listType=" << convertToString(ListType) << std::endl;
1245        #endif // DEBUG        #endif // DEBUG
1246          if (!bEndianNative) {          if (!pFile->bEndianNative) {
1247              //swapBytes_32(&ListType);              //swapBytes_32(&ListType);
1248          }          }
1249      }      }
1250    
1251        void List::WriteHeader(unsigned long fPos) {
1252            // the four list type bytes officially belong the chunk's body in the RIFF format
1253            NewChunkSize += 4;
1254            Chunk::WriteHeader(fPos);
1255            NewChunkSize -= 4; // just revert the +4 incrementation
1256            #if POSIX
1257            lseek(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
1258            write(pFile->hFileWrite, &ListType, 4);
1259            #elif defined(WIN32)
1260            SetFilePointer(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, NULL/*32 bit*/, FILE_BEGIN);
1261            DWORD dwBytesWritten;
1262            WriteFile(pFile->hFileWrite, &ListType, 4, &dwBytesWritten, NULL);
1263            #else
1264            fseek(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
1265            fwrite(&ListType, 4, 1, pFile->hFileWrite);
1266            #endif // POSIX
1267        }
1268    
1269      void List::LoadSubChunks() {      void List::LoadSubChunks() {
1270         #if DEBUG         #if DEBUG
1271         std::cout << "List::LoadSubChunks()";         std::cout << "List::LoadSubChunks()";
# Line 721  namespace RIFF { Line 1273  namespace RIFF {
1273          if (!pSubChunks) {          if (!pSubChunks) {
1274              pSubChunks    = new ChunkList();              pSubChunks    = new ChunkList();
1275              pSubChunksMap = new ChunkMap();              pSubChunksMap = new ChunkMap();
1276                #if defined(WIN32)
1277                if (pFile->hFileRead == INVALID_HANDLE_VALUE) return;
1278                #else
1279                if (!pFile->hFileRead) return;
1280                #endif
1281                unsigned long uiOriginalPos = GetPos();
1282                SetPos(0); // jump to beginning of list chunk body
1283              while (RemainingBytes() >= CHUNK_HEADER_SIZE) {              while (RemainingBytes() >= CHUNK_HEADER_SIZE) {
1284                  Chunk* ck;                  Chunk* ck;
1285                  uint32_t ckid;                  uint32_t ckid;
# Line 729  namespace RIFF { Line 1288  namespace RIFF {
1288         std::cout << " ckid=" << convertToString(ckid) << std::endl;         std::cout << " ckid=" << convertToString(ckid) << std::endl;
1289         #endif // DEBUG         #endif // DEBUG
1290                  if (ckid == CHUNK_ID_LIST) {                  if (ckid == CHUNK_ID_LIST) {
1291                      ck = new RIFF::List(hFile, ulStartPos + ulPos - 4, bEndianNative, this);                      ck = new RIFF::List(pFile, ulStartPos + ulPos - 4, this);
1292                      SetPos(ck->GetSize() + LIST_HEADER_SIZE - 4, RIFF::stream_curpos);                      SetPos(ck->GetSize() + LIST_HEADER_SIZE - 4, RIFF::stream_curpos);
1293                  }                  }
1294                  else { // simple chunk                  else { // simple chunk
1295                      ck = new RIFF::Chunk(hFile, ulStartPos + ulPos - 4, bEndianNative, this);                      ck = new RIFF::Chunk(pFile, ulStartPos + ulPos - 4, this);
1296                      SetPos(ck->GetSize() + CHUNK_HEADER_SIZE - 4, RIFF::stream_curpos);                      SetPos(ck->GetSize() + CHUNK_HEADER_SIZE - 4, RIFF::stream_curpos);
1297                  }                  }
1298                  pSubChunks->push_back(ck);                  pSubChunks->push_back(ck);
1299                  (*pSubChunksMap)[ckid] = ck;                  (*pSubChunksMap)[ckid] = ck;
1300                  if (GetPos() % 2 != 0) SetPos(1, RIFF::stream_curpos); // jump over pad byte                  if (GetPos() % 2 != 0) SetPos(1, RIFF::stream_curpos); // jump over pad byte
1301              }              }
1302                SetPos(uiOriginalPos); // restore position before this call
1303            }
1304        }
1305    
1306        void List::LoadSubChunksRecursively() {
1307            for (List* pList = GetFirstSubList(); pList; pList = GetNextSubList())
1308                pList->LoadSubChunksRecursively();
1309        }
1310    
1311        /** @brief Write list chunk persistently e.g. to disk.
1312         *
1313         * Stores the list chunk persistently to its actual "physical" file. All
1314         * subchunks (including sub list chunks) will be stored recursively as
1315         * well.
1316         *
1317         * @param ulWritePos - position within the "physical" file where this
1318         *                     list chunk should be written to
1319         * @param ulCurrentDataOffset - offset of current (old) data within
1320         *                              the file
1321         * @returns new write position in the "physical" file, that is
1322         *          \a ulWritePos incremented by this list chunk's new size
1323         *          (including its header size of course)
1324         */
1325        unsigned long List::WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset) {
1326            const unsigned long ulOriginalPos = ulWritePos;
1327            ulWritePos += LIST_HEADER_SIZE;
1328    
1329            if (pFile->Mode != stream_mode_read_write)
1330                throw Exception("Cannot write list chunk, file has to be opened in read+write mode");
1331    
1332            // write all subchunks (including sub list chunks) recursively
1333            if (pSubChunks) {
1334                for (ChunkList::iterator iter = pSubChunks->begin(), end = pSubChunks->end(); iter != end; ++iter) {
1335                    ulWritePos = (*iter)->WriteChunk(ulWritePos, ulCurrentDataOffset);
1336                }
1337            }
1338    
1339            // update this list chunk's header
1340            CurrentChunkSize = NewChunkSize = ulWritePos - ulOriginalPos - LIST_HEADER_SIZE;
1341            WriteHeader(ulOriginalPos);
1342    
1343            // offset of this list chunk in new written file may have changed
1344            ulStartPos = ulOriginalPos + LIST_HEADER_SIZE;
1345    
1346            return ulWritePos;
1347        }
1348    
1349        void List::__resetPos() {
1350            Chunk::__resetPos();
1351            if (pSubChunks) {
1352                for (ChunkList::iterator iter = pSubChunks->begin(), end = pSubChunks->end(); iter != end; ++iter) {
1353                    (*iter)->__resetPos();
1354                }
1355          }          }
1356      }      }
1357    
# Line 755  namespace RIFF { Line 1367  namespace RIFF {
1367  // *************** File ***************  // *************** File ***************
1368  // *  // *
1369    
1370      File::File(const String& path) : List() {      /** @brief Create new RIFF file.
1371         *
1372         * Use this constructor if you want to create a new RIFF file completely
1373         * "from scratch". Note: there must be no empty chunks or empty list
1374         * chunks when trying to make the new RIFF file persistent with Save()!
1375         *
1376         * Note: by default, the RIFF file will be saved in native endian
1377         * format; that is, as a RIFF file on little-endian machines and
1378         * as a RIFX file on big-endian. To change this behaviour, call
1379         * SetByteOrder() before calling Save().
1380         *
1381         * @param FileType - four-byte identifier of the RIFF file type
1382         * @see AddSubChunk(), AddSubList(), SetByteOrder()
1383         */
1384        File::File(uint32_t FileType) : List(this) {
1385            #if defined(WIN32)
1386            hFileRead = hFileWrite = INVALID_HANDLE_VALUE;
1387            #else
1388            hFileRead = hFileWrite = 0;
1389            #endif
1390            Mode = stream_mode_closed;
1391            bEndianNative = true;
1392            ulStartPos = RIFF_HEADER_SIZE;
1393            ListType = FileType;
1394        }
1395    
1396        /** @brief Load existing RIFF file.
1397         *
1398         * Loads an existing RIFF file with all its chunks.
1399         *
1400         * @param path - path and file name of the RIFF file to open
1401         * @throws RIFF::Exception if error occured while trying to load the
1402         *                         given RIFF file
1403         */
1404        File::File(const String& path) : List(this), Filename(path) {
1405        #if DEBUG        #if DEBUG
1406        std::cout << "File::File("<<path<<")" << std::endl;        std::cout << "File::File("<<path<<")" << std::endl;
1407        #endif // DEBUG        #endif // DEBUG
1408          bEndianNative = true;          bEndianNative = true;
1409          #if POSIX          #if POSIX
1410          hFile = open(path.c_str(), O_RDONLY | O_NONBLOCK);          hFileRead = hFileWrite = open(path.c_str(), O_RDONLY | O_NONBLOCK);
1411          if (hFile <= 0) {          if (hFileRead <= 0) {
1412              hFile = 0;              hFileRead = hFileWrite = 0;
1413                throw RIFF::Exception("Can't open \"" + path + "\"");
1414            }
1415            #elif defined(WIN32)
1416            hFileRead = hFileWrite = CreateFile(
1417                                         path.c_str(), GENERIC_READ,
1418                                         FILE_SHARE_READ | FILE_SHARE_WRITE,
1419                                         NULL, OPEN_EXISTING,
1420                                         FILE_ATTRIBUTE_NORMAL |
1421                                         FILE_FLAG_RANDOM_ACCESS, NULL
1422                                     );
1423            if (hFileRead == INVALID_HANDLE_VALUE) {
1424                hFileRead = hFileWrite = INVALID_HANDLE_VALUE;
1425              throw RIFF::Exception("Can't open \"" + path + "\"");              throw RIFF::Exception("Can't open \"" + path + "\"");
1426          }          }
1427          #else          #else
1428          hFile = fopen(path.c_str(), "rb");          hFileRead = hFileWrite = fopen(path.c_str(), "rb");
1429          if (!hFile) throw RIFF::Exception("Can't open \"" + path + "\"");          if (!hFileRead) throw RIFF::Exception("Can't open \"" + path + "\"");
1430          #endif // POSIX          #endif // POSIX
1431            Mode = stream_mode_read;
1432          ulStartPos = RIFF_HEADER_SIZE;          ulStartPos = RIFF_HEADER_SIZE;
1433          ReadHeader(0);          ReadHeader(0);
1434          if (ChunkID != CHUNK_ID_RIFF) {          if (ChunkID != CHUNK_ID_RIFF) {
# Line 777  namespace RIFF { Line 1436  namespace RIFF {
1436          }          }
1437      }      }
1438    
1439        String File::GetFileName() {
1440            return Filename;
1441        }
1442    
1443        stream_mode_t File::GetMode() {
1444            return Mode;
1445        }
1446    
1447        /** @brief Change file access mode.
1448         *
1449         * Changes files access mode either to read-only mode or to read/write
1450         * mode.
1451         *
1452         * @param NewMode - new file access mode
1453         * @returns true if mode was changed, false if current mode already
1454         *          equals new mode
1455         * @throws RIFF::Exception if new file access mode is unknown
1456         */
1457        bool File::SetMode(stream_mode_t NewMode) {
1458            if (NewMode != Mode) {
1459                switch (NewMode) {
1460                    case stream_mode_read:
1461                        #if POSIX
1462                        if (hFileRead) close(hFileRead);
1463                        hFileRead = hFileWrite = open(Filename.c_str(), O_RDONLY | O_NONBLOCK);
1464                        if (hFileRead < 0) {
1465                            hFileRead = hFileWrite = 0;
1466                            throw Exception("Could not (re)open file \"" + Filename + "\" in read mode");
1467                        }
1468                        #elif defined(WIN32)
1469                        if (hFileRead != INVALID_HANDLE_VALUE) CloseHandle(hFileRead);
1470                        hFileRead = hFileWrite = CreateFile(
1471                                                     Filename.c_str(), GENERIC_READ,
1472                                                     FILE_SHARE_READ | FILE_SHARE_WRITE,
1473                                                     NULL, OPEN_EXISTING,
1474                                                     FILE_ATTRIBUTE_NORMAL |
1475                                                     FILE_FLAG_RANDOM_ACCESS,
1476                                                     NULL
1477                                                 );
1478                        if (hFileRead == INVALID_HANDLE_VALUE) {
1479                            hFileRead = hFileWrite = INVALID_HANDLE_VALUE;
1480                            throw Exception("Could not (re)open file \"" + Filename + "\" in read mode");
1481                        }
1482                        #else
1483                        if (hFileRead) fclose(hFileRead);
1484                        hFileRead = hFileWrite = fopen(Filename.c_str(), "rb");
1485                        if (!hFileRead) throw Exception("Could not (re)open file \"" + Filename + "\" in read mode");
1486                        #endif
1487                        __resetPos(); // reset read/write position of ALL 'Chunk' objects
1488                        break;
1489                    case stream_mode_read_write:
1490                        #if POSIX
1491                        if (hFileRead) close(hFileRead);
1492                        hFileRead = hFileWrite = open(Filename.c_str(), O_RDWR | O_NONBLOCK);
1493                        if (hFileRead < 0) {
1494                            hFileRead = hFileWrite = open(Filename.c_str(), O_RDONLY | O_NONBLOCK);
1495                            throw Exception("Could not open file \"" + Filename + "\" in read+write mode");
1496                        }
1497                        #elif defined(WIN32)
1498                        if (hFileRead != INVALID_HANDLE_VALUE) CloseHandle(hFileRead);
1499                        hFileRead = hFileWrite = CreateFile(
1500                                                     Filename.c_str(),
1501                                                     GENERIC_READ | GENERIC_WRITE,
1502                                                     FILE_SHARE_READ,
1503                                                     NULL, OPEN_ALWAYS,
1504                                                     FILE_ATTRIBUTE_NORMAL |
1505                                                     FILE_FLAG_RANDOM_ACCESS,
1506                                                     NULL
1507                                                 );
1508                        if (hFileRead == INVALID_HANDLE_VALUE) {
1509                            hFileRead = hFileWrite = CreateFile(
1510                                                         Filename.c_str(), GENERIC_READ,
1511                                                         FILE_SHARE_READ | FILE_SHARE_WRITE,
1512                                                         NULL, OPEN_EXISTING,
1513                                                         FILE_ATTRIBUTE_NORMAL |
1514                                                         FILE_FLAG_RANDOM_ACCESS,
1515                                                         NULL
1516                                                     );
1517                            throw Exception("Could not (re)open file \"" + Filename + "\" in read+write mode");
1518                        }
1519                        #else
1520                        if (hFileRead) fclose(hFileRead);
1521                        hFileRead = hFileWrite = fopen(Filename.c_str(), "r+b");
1522                        if (!hFileRead) {
1523                            hFileRead = hFileWrite = fopen(Filename.c_str(), "rb");
1524                            throw Exception("Could not open file \"" + Filename + "\" in read+write mode");
1525                        }
1526                        #endif
1527                        __resetPos(); // reset read/write position of ALL 'Chunk' objects
1528                        break;
1529                    case stream_mode_closed:
1530                        #if POSIX
1531                        if (hFileRead)  close(hFileRead);
1532                        if (hFileWrite) close(hFileWrite);
1533                        #elif defined(WIN32)
1534                        if (hFileRead  != INVALID_HANDLE_VALUE) CloseHandle(hFileRead);
1535                        if (hFileWrite != INVALID_HANDLE_VALUE) CloseHandle(hFileWrite);
1536                        #else
1537                        if (hFileRead)  fclose(hFileRead);
1538                        if (hFileWrite) fclose(hFileWrite);
1539                        #endif
1540                        hFileRead = hFileWrite = 0;
1541                        break;
1542                    default:
1543                        throw Exception("Unknown file access mode");
1544                }
1545                Mode = NewMode;
1546                return true;
1547            }
1548            return false;
1549        }
1550    
1551        /** @brief Set the byte order to be used when saving.
1552         *
1553         * Set the byte order to be used in the file. A value of
1554         * endian_little will create a RIFF file, endian_big a RIFX file
1555         * and endian_native will create a RIFF file on little-endian
1556         * machines and RIFX on big-endian machines.
1557         *
1558         * @param Endian - endianess to use when file is saved.
1559         */
1560        void File::SetByteOrder(endian_t Endian) {
1561            #if WORDS_BIGENDIAN
1562            bEndianNative = Endian != endian_little;
1563            #else
1564            bEndianNative = Endian != endian_big;
1565            #endif
1566        }
1567    
1568        /** @brief Save changes to same file.
1569         *
1570         * Make all changes of all chunks persistent by writing them to the
1571         * actual (same) file. The file might temporarily grow to a higher size
1572         * than it will have at the end of the saving process, in case chunks
1573         * were grown.
1574         *
1575         * @throws RIFF::Exception if there is an empty chunk or empty list
1576         *                         chunk or any kind of IO error occured
1577         */
1578        void File::Save() {
1579            // make sure the RIFF tree is built (from the original file)
1580            LoadSubChunksRecursively();
1581    
1582            // reopen file in write mode
1583            SetMode(stream_mode_read_write);
1584    
1585            // to be able to save the whole file without loading everything into
1586            // RAM and without having to store the data in a temporary file, we
1587            // enlarge the file with the sum of all _positive_ chunk size
1588            // changes, move current data towards the end of the file with the
1589            // calculated sum and finally update / rewrite the file by copying
1590            // the old data back to the right position at the beginning of the file
1591    
1592            // first we sum up all positive chunk size changes (and skip all negative ones)
1593            unsigned long ulPositiveSizeDiff = 0;
1594            for (std::set<Chunk*>::const_iterator iter = ResizedChunks.begin(), end = ResizedChunks.end(); iter != end; ++iter) {
1595                if ((*iter)->GetNewSize() == 0) {
1596                    throw Exception("There is at least one empty chunk (zero size): " + __resolveChunkPath(*iter));
1597                }
1598                unsigned long ulDiff = (*iter)->GetNewSize() + (*iter)->GetNewSize() % 2 - (*iter)->GetSize() - (*iter)->GetSize() % 2;
1599                if (ulDiff > 0) ulPositiveSizeDiff += ulDiff;
1600            }
1601    
1602            unsigned long ulWorkingFileSize = GetFileSize();
1603    
1604            // if there are positive size changes...
1605            if (ulPositiveSizeDiff > 0) {
1606                // ... we enlarge this file first ...
1607                ulWorkingFileSize += ulPositiveSizeDiff;
1608                ResizeFile(ulWorkingFileSize);
1609                // ... and move current data by the same amount towards end of file.
1610                int8_t* pCopyBuffer = new int8_t[4096];
1611                const unsigned long ulFileSize = GetSize() + RIFF_HEADER_SIZE;
1612                #if defined(WIN32)
1613                DWORD iBytesMoved = 1; // we have to pass it via pointer to the Windows API, thus the correct size must be ensured
1614                #else
1615                int iBytesMoved = 1;
1616                #endif
1617                for (unsigned long ulPos = ulFileSize; iBytesMoved > 0; ) {
1618                    iBytesMoved = (ulPos < 4096) ? ulPos : 4096;
1619                    ulPos -= iBytesMoved;
1620                    #if POSIX
1621                    lseek(hFileRead, ulPos, SEEK_SET);
1622                    iBytesMoved = read(hFileRead, pCopyBuffer, iBytesMoved);
1623                    lseek(hFileWrite, ulPos + ulPositiveSizeDiff, SEEK_SET);
1624                    iBytesMoved = write(hFileWrite, pCopyBuffer, iBytesMoved);
1625                    #elif defined(WIN32)
1626                    SetFilePointer(hFileRead, ulPos, NULL/*32 bit*/, FILE_BEGIN);
1627                    ReadFile(hFileRead, pCopyBuffer, iBytesMoved, &iBytesMoved, NULL);
1628                    SetFilePointer(hFileWrite, ulPos + ulPositiveSizeDiff, NULL/*32 bit*/, FILE_BEGIN);
1629                    WriteFile(hFileWrite, pCopyBuffer, iBytesMoved, &iBytesMoved, NULL);
1630                    #else
1631                    fseek(hFileRead, ulPos, SEEK_SET);
1632                    iBytesMoved = fread(pCopyBuffer, 1, iBytesMoved, hFileRead);
1633                    fseek(hFileWrite, ulPos + ulPositiveSizeDiff, SEEK_SET);
1634                    iBytesMoved = fwrite(pCopyBuffer, 1, iBytesMoved, hFileWrite);
1635                    #endif
1636                }
1637                delete[] pCopyBuffer;
1638                if (iBytesMoved < 0) throw Exception("Could not modify file while trying to enlarge it");
1639            }
1640    
1641            // rebuild / rewrite complete RIFF tree
1642            unsigned long ulTotalSize  = WriteChunk(0, ulPositiveSizeDiff);
1643            unsigned long ulActualSize = __GetFileSize(hFileWrite);
1644    
1645            // resize file to the final size
1646            if (ulTotalSize < ulActualSize) ResizeFile(ulTotalSize);
1647    
1648            // forget all resized chunks
1649            ResizedChunks.clear();
1650        }
1651    
1652        /** @brief Save changes to another file.
1653         *
1654         * Make all changes of all chunks persistent by writing them to another
1655         * file. <b>Caution:</b> this method is optimized for writing to
1656         * <b>another</b> file, do not use it to save the changes to the same
1657         * file! Use File::Save() in that case instead! Ignoring this might
1658         * result in a corrupted file, especially in case chunks were resized!
1659         *
1660         * After calling this method, this File object will be associated with
1661         * the new file (given by \a path) afterwards.
1662         *
1663         * @param path - path and file name where everything should be written to
1664         */
1665        void File::Save(const String& path) {
1666            //TODO: we should make a check here if somebody tries to write to the same file and automatically call the other Save() method in that case
1667    
1668            // make sure the RIFF tree is built (from the original file)
1669            LoadSubChunksRecursively();
1670    
1671            if (Filename.length() > 0) SetMode(stream_mode_read);
1672            // open the other (new) file for writing and truncate it to zero size
1673            #if POSIX
1674            hFileWrite = open(path.c_str(), O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP);
1675            if (hFileWrite < 0) {
1676                hFileWrite = hFileRead;
1677                throw Exception("Could not open file \"" + path + "\" for writing");
1678            }
1679            #elif defined(WIN32)
1680            hFileWrite = CreateFile(
1681                             path.c_str(), GENERIC_WRITE, FILE_SHARE_READ,
1682                             NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL |
1683                             FILE_FLAG_RANDOM_ACCESS, NULL
1684                         );
1685            if (hFileWrite == INVALID_HANDLE_VALUE) {
1686                hFileWrite = hFileRead;
1687                throw Exception("Could not open file \"" + path + "\" for writing");
1688            }
1689            #else
1690            hFileWrite = fopen(path.c_str(), "w+b");
1691            if (!hFileWrite) {
1692                hFileWrite = hFileRead;
1693                throw Exception("Could not open file \"" + path + "\" for writing");
1694            }
1695            #endif // POSIX
1696            Mode = stream_mode_read_write;
1697    
1698            // write complete RIFF tree to the other (new) file
1699            unsigned long ulTotalSize  = WriteChunk(0, 0);
1700            unsigned long ulActualSize = __GetFileSize(hFileWrite);
1701    
1702            // resize file to the final size (if the file was originally larger)
1703            if (ulTotalSize < ulActualSize) ResizeFile(ulTotalSize);
1704    
1705            // forget all resized chunks
1706            ResizedChunks.clear();
1707    
1708            #if POSIX
1709            if (hFileWrite) close(hFileWrite);
1710            #elif defined(WIN32)
1711            if (hFileWrite != INVALID_HANDLE_VALUE) CloseHandle(hFileWrite);
1712            #else
1713            if (hFileWrite) fclose(hFileWrite);
1714            #endif
1715            hFileWrite = hFileRead;
1716    
1717            // associate new file with this File object from now on
1718            Filename = path;
1719            Mode = (stream_mode_t) -1;       // Just set it to an undefined mode ...
1720            SetMode(stream_mode_read_write); // ... so SetMode() has to reopen the file handles.
1721        }
1722    
1723        void File::ResizeFile(unsigned long ulNewSize) {
1724            #if POSIX
1725            if (ftruncate(hFileWrite, ulNewSize) < 0)
1726                throw Exception("Could not resize file \"" + Filename + "\"");
1727            #elif defined(WIN32)
1728            if (
1729                SetFilePointer(hFileWrite, ulNewSize, NULL/*32 bit*/, FILE_BEGIN) == INVALID_SET_FILE_POINTER ||
1730                !SetEndOfFile(hFileWrite)
1731            ) throw Exception("Could not resize file \"" + Filename + "\"");
1732            #else
1733            # error Sorry, this version of libgig only supports POSIX and Windows systems yet.
1734            # error Reason: portable implementation of RIFF::File::ResizeFile() is missing (yet)!
1735            #endif
1736        }
1737    
1738      File::~File() {      File::~File() {
1739         #if DEBUG         #if DEBUG
1740         std::cout << "File::~File()" << std::endl;         std::cout << "File::~File()" << std::endl;
1741         #endif // DEBUG         #endif // DEBUG
1742          #if POSIX          #if POSIX
1743          if (hFile) close(hFile);          if (hFileRead) close(hFileRead);
1744            #elif defined(WIN32)
1745            if (hFileRead != INVALID_HANDLE_VALUE) CloseHandle(hFileRead);
1746          #else          #else
1747          if (hFile) fclose(hFile);          if (hFileRead) fclose(hFileRead);
1748          #endif // POSIX          #endif // POSIX
1749      }      }
1750    
1751        void File::LogAsResized(Chunk* pResizedChunk) {
1752            ResizedChunks.insert(pResizedChunk);
1753        }
1754    
1755        void File::UnlogResized(Chunk* pResizedChunk) {
1756            ResizedChunks.erase(pResizedChunk);
1757        }
1758    
1759      unsigned long File::GetFileSize() {      unsigned long File::GetFileSize() {
1760          #if POSIX          return __GetFileSize(hFileRead);
1761        }
1762    
1763        #if POSIX
1764        unsigned long File::__GetFileSize(int hFile) {
1765          struct stat filestat;          struct stat filestat;
1766          fstat(hFile, &filestat);          fstat(hFile, &filestat);
1767          long size = filestat.st_size;          long size = filestat.st_size;
1768          #else // standard C functions          return size;
1769        }
1770        #elif defined(WIN32)
1771        unsigned long File::__GetFileSize(HANDLE hFile) {
1772            DWORD dwSize = ::GetFileSize(hFile, NULL /*32bit*/);
1773            if (dwSize == INVALID_FILE_SIZE)
1774                throw Exception("Windows FS error: could not determine file size");
1775            return dwSize;
1776        }
1777        #else // standard C functions
1778        unsigned long File::__GetFileSize(FILE* hFile) {
1779          long curpos = ftell(hFile);          long curpos = ftell(hFile);
1780          fseek(hFile, 0, SEEK_END);          fseek(hFile, 0, SEEK_END);
1781          long size = ftell(hFile);          long size = ftell(hFile);
1782          fseek(hFile, curpos, SEEK_SET);          fseek(hFile, curpos, SEEK_SET);
         #endif // POSIX  
1783          return size;          return size;
1784      }      }
1785        #endif
1786    
1787    
1788  // *************** Exception ***************  // *************** Exception ***************
# Line 811  namespace RIFF { Line 1792  namespace RIFF {
1792          std::cout << "RIFF::Exception: " << Message << std::endl;          std::cout << "RIFF::Exception: " << Message << std::endl;
1793      }      }
1794    
1795    
1796    // *************** functions ***************
1797    // *
1798    
1799        /**
1800         * Returns the name of this C++ library. This is usually "libgig" of
1801         * course. This call is equivalent to DLS::libraryName() and
1802         * gig::libraryName().
1803         */
1804        String libraryName() {
1805            return PACKAGE;
1806        }
1807    
1808        /**
1809         * Returns version of this C++ library. This call is equivalent to
1810         * DLS::libraryVersion() and gig::libraryVersion().
1811         */
1812        String libraryVersion() {
1813            return VERSION;
1814        }
1815    
1816  } // namespace RIFF  } // namespace RIFF
 #endif  
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