/[svn]/libgig/trunk/src/RIFF.cpp
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revision 384 by schoenebeck, Thu Feb 17 02:22:26 2005 UTC revision 1859 by persson, Sun Mar 8 12:24:56 2009 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) 2003-2005 by Christian Schoenebeck                      *   *   Copyright (C) 2003-2009 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 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 (ulStartPos == 0) return 0; // is only 0 if this is a new chunk, so nothing to read (yet)
278          if (ulPos + WordCount * WordSize >= ChunkSize) WordCount = (ChunkSize - ulPos) / WordSize;          if (ulPos >= CurrentChunkSize) return 0;
279            if (ulPos + WordCount * WordSize >= CurrentChunkSize) WordCount = (CurrentChunkSize - ulPos) / WordSize;
280          #if POSIX          #if POSIX
281          if (lseek(hFile, ulStartPos + ulPos, SEEK_SET) < 0) return 0;          if (lseek(pFile->hFileRead, ulStartPos + ulPos, SEEK_SET) < 0) return 0;
282          unsigned long readWords = read(hFile, pData, WordCount * WordSize);          unsigned long readWords = read(pFile->hFileRead, pData, WordCount * WordSize);
283            if (readWords < 1) return 0;
284            readWords /= WordSize;
285            #elif defined(WIN32)
286            if (SetFilePointer(pFile->hFileRead, ulStartPos + ulPos, NULL/*32 bit*/, FILE_BEGIN) == INVALID_SET_FILE_POINTER) return 0;
287            DWORD readWords;
288            ReadFile(pFile->hFileRead, pData, WordCount * WordSize, &readWords, NULL);
289          if (readWords < 1) return 0;          if (readWords < 1) return 0;
290          readWords /= WordSize;          readWords /= WordSize;
291          #else // standard C functions          #else // standard C functions
292          if (fseek(hFile, ulStartPos + ulPos, SEEK_SET)) return 0;          if (fseek(pFile->hFileRead, ulStartPos + ulPos, SEEK_SET)) return 0;
293          unsigned long readWords = fread(pData, WordSize, WordCount, hFile);          unsigned long readWords = fread(pData, WordSize, WordCount, pFile->hFileRead);
294          #endif // POSIX          #endif // POSIX
295          if (!bEndianNative && WordSize != 1) {          if (!pFile->bEndianNative && WordSize != 1) {
296              switch (WordSize) {              switch (WordSize) {
297                  case 2:                  case 2:
298                      for (unsigned long iWord = 0; iWord < readWords; iWord++)                      for (unsigned long iWord = 0; iWord < readWords; iWord++)
# Line 223  namespace RIFF { Line 312  namespace RIFF {
312          return readWords;          return readWords;
313      }      }
314    
315        /**
316         *  Writes \a WordCount number of data words with given \a WordSize from
317         *  the buffer pointed by \a pData. Be sure to provide the correct
318         *  \a WordSize, as this will be important and taken into account for
319         *  eventual endian correction (swapping of bytes due to different
320         *  native byte order of a system). The position within the chunk will
321         *  automatically be incremented.
322         *
323         *  @param pData      source buffer (containing the data)
324         *  @param WordCount  number of data words to write
325         *  @param WordSize   size of each data word to write
326         *  @returns          number of successfully written data words
327         *  @throws RIFF::Exception  if write operation would exceed current
328         *                           chunk size or any IO error occured
329         *  @see Resize()
330         */
331        unsigned long Chunk::Write(void* pData, unsigned long WordCount, unsigned long WordSize) {
332            if (pFile->Mode != stream_mode_read_write)
333                throw Exception("Cannot write data to chunk, file has to be opened in read+write mode first");
334            if (ulPos >= CurrentChunkSize || ulPos + WordCount * WordSize > CurrentChunkSize)
335                throw Exception("End of chunk reached while trying to write data");
336            if (!pFile->bEndianNative && WordSize != 1) {
337                switch (WordSize) {
338                    case 2:
339                        for (unsigned long iWord = 0; iWord < WordCount; iWord++)
340                            swapBytes_16((uint16_t*) pData + iWord);
341                        break;
342                    case 4:
343                        for (unsigned long iWord = 0; iWord < WordCount; iWord++)
344                            swapBytes_32((uint32_t*) pData + iWord);
345                        break;
346                    default:
347                        for (unsigned long iWord = 0; iWord < WordCount; iWord++)
348                            swapBytes((uint8_t*) pData + iWord * WordSize, WordSize);
349                        break;
350                }
351            }
352            #if POSIX
353            if (lseek(pFile->hFileWrite, ulStartPos + ulPos, SEEK_SET) < 0) {
354                throw Exception("Could not seek to position " + ToString(ulPos) +
355                                " in chunk (" + ToString(ulStartPos + ulPos) + " in file)");
356            }
357            unsigned long writtenWords = write(pFile->hFileWrite, pData, WordCount * WordSize);
358            if (writtenWords < 1) throw Exception("POSIX IO Error while trying to write chunk data");
359            writtenWords /= WordSize;
360            #elif defined(WIN32)
361            if (SetFilePointer(pFile->hFileWrite, ulStartPos + ulPos, NULL/*32 bit*/, FILE_BEGIN) == INVALID_SET_FILE_POINTER) {
362                throw Exception("Could not seek to position " + ToString(ulPos) +
363                                " in chunk (" + ToString(ulStartPos + ulPos) + " in file)");
364            }
365            DWORD writtenWords;
366            WriteFile(pFile->hFileWrite, pData, WordCount * WordSize, &writtenWords, NULL);
367            if (writtenWords < 1) throw Exception("Windows IO Error while trying to write chunk data");
368            writtenWords /= WordSize;
369            #else // standard C functions
370            if (fseek(pFile->hFileWrite, ulStartPos + ulPos, SEEK_SET)) {
371                throw Exception("Could not seek to position " + ToString(ulPos) +
372                                " in chunk (" + ToString(ulStartPos + ulPos) + " in file)");
373            }
374            unsigned long writtenWords = fwrite(pData, WordSize, WordCount, pFile->hFileWrite);
375            #endif // POSIX
376            SetPos(writtenWords * WordSize, stream_curpos);
377            return writtenWords;
378        }
379    
380      /** 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. */
381      unsigned long Chunk::ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize) {      unsigned long Chunk::ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize) {
382          unsigned long readWords = Read(pData, WordCount, WordSize);          unsigned long readWords = Read(pData, WordCount, WordSize);
# Line 249  namespace RIFF { Line 403  namespace RIFF {
403      }      }
404    
405      /**      /**
406         * Writes \a WordCount number of 8 Bit signed integer words from the
407         * buffer pointed by \a pData to the chunk's body, directly to the
408         * actual "physical" file. The position within the chunk will
409         * automatically be incremented. Note: you cannot write beyond the
410         * boundaries of the chunk, to append data to the chunk call Resize()
411         * before.
412         *
413         * @param pData             source buffer (containing the data)
414         * @param WordCount         number of 8 Bit signed integers to write
415         * @returns                 number of written integers
416         * @throws RIFF::Exception  if an IO error occured
417         * @see Resize()
418         */
419        unsigned long Chunk::WriteInt8(int8_t* pData, unsigned long WordCount) {
420            return Write(pData, WordCount, 1);
421        }
422    
423        /**
424       * Reads \a WordCount number of 8 Bit unsigned integer words and copies       * Reads \a WordCount number of 8 Bit unsigned integer words and copies
425       * 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
426       * allocated. The position within the chunk will automatically be       * allocated. The position within the chunk will automatically be
# Line 268  namespace RIFF { Line 440  namespace RIFF {
440      }      }
441    
442      /**      /**
443         * Writes \a WordCount number of 8 Bit unsigned integer words from the
444         * buffer pointed by \a pData to the chunk's body, directly to the
445         * actual "physical" file. The position within the chunk will
446         * automatically be incremented. Note: you cannot write beyond the
447         * boundaries of the chunk, to append data to the chunk call Resize()
448         * before.
449         *
450         * @param pData             source buffer (containing the data)
451         * @param WordCount         number of 8 Bit unsigned integers to write
452         * @returns                 number of written integers
453         * @throws RIFF::Exception  if an IO error occured
454         * @see Resize()
455         */
456        unsigned long Chunk::WriteUint8(uint8_t* pData, unsigned long WordCount) {
457            return Write(pData, WordCount, 1);
458        }
459    
460        /**
461       * Reads \a WordCount number of 16 Bit signed integer words and copies       * Reads \a WordCount number of 16 Bit signed integer words and copies
462       * 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
463       * allocated. Endian correction will automatically be done if needed.       * allocated. Endian correction will automatically be done if needed.
# Line 287  namespace RIFF { Line 477  namespace RIFF {
477      }      }
478    
479      /**      /**
480         * Writes \a WordCount number of 16 Bit signed integer words from the
481         * buffer pointed by \a pData to the chunk's body, directly to the
482         * actual "physical" file. The position within the chunk will
483         * automatically be incremented. Note: you cannot write beyond the
484         * boundaries of the chunk, to append data to the chunk call Resize()
485         * before.
486         *
487         * @param pData             source buffer (containing the data)
488         * @param WordCount         number of 16 Bit signed integers to write
489         * @returns                 number of written integers
490         * @throws RIFF::Exception  if an IO error occured
491         * @see Resize()
492         */
493        unsigned long Chunk::WriteInt16(int16_t* pData, unsigned long WordCount) {
494            return Write(pData, WordCount, 2);
495        }
496    
497        /**
498       * Reads \a WordCount number of 16 Bit unsigned integer words and copies       * Reads \a WordCount number of 16 Bit unsigned integer words and copies
499       * 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
500       * allocated. Endian correction will automatically be done if needed.       * allocated. Endian correction will automatically be done if needed.
# Line 306  namespace RIFF { Line 514  namespace RIFF {
514      }      }
515    
516      /**      /**
517         * Writes \a WordCount number of 16 Bit unsigned integer words from the
518         * buffer pointed by \a pData to the chunk's body, directly to the
519         * actual "physical" file. The position within the chunk will
520         * automatically be incremented. Note: you cannot write beyond the
521         * boundaries of the chunk, to append data to the chunk call Resize()
522         * before.
523         *
524         * @param pData             source buffer (containing the data)
525         * @param WordCount         number of 16 Bit unsigned integers to write
526         * @returns                 number of written integers
527         * @throws RIFF::Exception  if an IO error occured
528         * @see Resize()
529         */
530        unsigned long Chunk::WriteUint16(uint16_t* pData, unsigned long WordCount) {
531            return Write(pData, WordCount, 2);
532        }
533    
534        /**
535       * Reads \a WordCount number of 32 Bit signed integer words and copies       * Reads \a WordCount number of 32 Bit signed integer words and copies
536       * 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
537       * allocated. Endian correction will automatically be done if needed.       * allocated. Endian correction will automatically be done if needed.
# Line 325  namespace RIFF { Line 551  namespace RIFF {
551      }      }
552    
553      /**      /**
554         * Writes \a WordCount number of 32 Bit signed integer words from the
555         * buffer pointed by \a pData to the chunk's body, directly to the
556         * actual "physical" file. The position within the chunk will
557         * automatically be incremented. Note: you cannot write beyond the
558         * boundaries of the chunk, to append data to the chunk call Resize()
559         * before.
560         *
561         * @param pData             source buffer (containing the data)
562         * @param WordCount         number of 32 Bit signed integers to write
563         * @returns                 number of written integers
564         * @throws RIFF::Exception  if an IO error occured
565         * @see Resize()
566         */
567        unsigned long Chunk::WriteInt32(int32_t* pData, unsigned long WordCount) {
568            return Write(pData, WordCount, 4);
569        }
570    
571        /**
572       * Reads \a WordCount number of 32 Bit unsigned integer words and copies       * Reads \a WordCount number of 32 Bit unsigned integer words and copies
573       * 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
574       * allocated. Endian correction will automatically be done if needed.       * allocated. Endian correction will automatically be done if needed.
# Line 344  namespace RIFF { Line 588  namespace RIFF {
588      }      }
589    
590      /**      /**
591         * Writes \a WordCount number of 32 Bit unsigned integer words from the
592         * buffer pointed by \a pData to the chunk's body, directly to the
593         * actual "physical" file. The position within the chunk will
594         * automatically be incremented. Note: you cannot write beyond the
595         * boundaries of the chunk, to append data to the chunk call Resize()
596         * before.
597         *
598         * @param pData             source buffer (containing the data)
599         * @param WordCount         number of 32 Bit unsigned integers to write
600         * @returns                 number of written integers
601         * @throws RIFF::Exception  if an IO error occured
602         * @see Resize()
603         */
604        unsigned long Chunk::WriteUint32(uint32_t* pData, unsigned long WordCount) {
605            return Write(pData, WordCount, 4);
606        }
607    
608        /**
609       * Reads one 8 Bit signed integer word and increments the position within       * Reads one 8 Bit signed integer word and increments the position within
610       * the chunk.       * the chunk.
611       *       *
# Line 443  namespace RIFF { Line 705  namespace RIFF {
705          return word;          return word;
706      }      }
707    
708        /** @brief Load chunk body into RAM.
709         *
710         * Loads the whole chunk body into memory. You can modify the data in
711         * RAM and save the data by calling File::Save() afterwards.
712         *
713         * <b>Caution:</b> the buffer pointer will be invalidated once
714         * File::Save() was called. You have to call LoadChunkData() again to
715         * get a new, valid pointer whenever File::Save() was called.
716         *
717         * You can call LoadChunkData() again if you previously scheduled to
718         * enlarge this chunk with a Resize() call. In that case the buffer will
719         * be enlarged to the new, scheduled chunk size and you can already
720         * place the new chunk data to the buffer and finally call File::Save()
721         * to enlarge the chunk physically and write the new data in one rush.
722         * This approach is definitely recommended if you have to enlarge and
723         * write new data to a lot of chunks.
724         *
725         * @returns a pointer to the data in RAM on success, NULL otherwise
726         * @throws Exception if data buffer could not be enlarged
727         * @see ReleaseChunkData()
728         */
729      void* Chunk::LoadChunkData() {      void* Chunk::LoadChunkData() {
730          if (!pChunkData) {          if (!pChunkData && pFile->Filename != "" && ulStartPos != 0) {
731              #if POSIX              #if POSIX
732              if (lseek(hFile, ulStartPos, SEEK_SET) == -1) return NULL;              if (lseek(pFile->hFileRead, ulStartPos, SEEK_SET) == -1) return NULL;
733              pChunkData = new uint8_t[GetSize()];              #elif defined(WIN32)
734              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());  
735              #else              #else
736              if (fseek(hFile, ulStartPos, SEEK_SET)) return NULL;              if (fseek(pFile->hFileRead, ulStartPos, SEEK_SET)) return NULL;
737              pChunkData = new uint8_t[GetSize()];              #endif // POSIX
738                unsigned long ulBufferSize = (CurrentChunkSize > NewChunkSize) ? CurrentChunkSize : NewChunkSize;
739                pChunkData = new uint8_t[ulBufferSize];
740              if (!pChunkData) return NULL;              if (!pChunkData) return NULL;
741              unsigned long readWords = fread(pChunkData, 1, GetSize(), hFile);              memset(pChunkData, 0, ulBufferSize);
742                #if POSIX
743                unsigned long readWords = read(pFile->hFileRead, pChunkData, GetSize());
744                #elif defined(WIN32)
745                DWORD readWords;
746                ReadFile(pFile->hFileRead, pChunkData, GetSize(), &readWords, NULL);
747                #else
748                unsigned long readWords = fread(pChunkData, 1, GetSize(), pFile->hFileRead);
749              #endif // POSIX              #endif // POSIX
750              if (readWords != GetSize()) {              if (readWords != GetSize()) {
751                  delete[] pChunkData;                  delete[] pChunkData;
752                  return (pChunkData = NULL);                  return (pChunkData = NULL);
753              }              }
754                ulChunkDataSize = ulBufferSize;
755            } else if (NewChunkSize > ulChunkDataSize) {
756                uint8_t* pNewBuffer = new uint8_t[NewChunkSize];
757                if (!pNewBuffer) throw Exception("Could not enlarge chunk data buffer to " + ToString(NewChunkSize) + " bytes");
758                memset(pNewBuffer, 0 , NewChunkSize);
759                memcpy(pNewBuffer, pChunkData, ulChunkDataSize);
760                delete[] pChunkData;
761                pChunkData      = pNewBuffer;
762                ulChunkDataSize = NewChunkSize;
763          }          }
764          return pChunkData;          return pChunkData;
765      }      }
766    
767        /** @brief Free loaded chunk body from RAM.
768         *
769         * Frees loaded chunk body data from memory (RAM). You should call
770         * File::Save() before calling this method if you modified the data to
771         * make the changes persistent.
772         */
773      void Chunk::ReleaseChunkData() {      void Chunk::ReleaseChunkData() {
774          if (pChunkData) {          if (pChunkData) {
775              delete[] pChunkData;              delete[] pChunkData;
# Line 471  namespace RIFF { Line 777  namespace RIFF {
777          }          }
778      }      }
779    
780        /** @brief Resize chunk.
781         *
782         * Resizes this chunk's body, that is the actual size of data possible
783         * to be written to this chunk. This call will return immediately and
784         * just schedule the resize operation. You should call File::Save() to
785         * actually perform the resize operation(s) "physically" to the file.
786         * As this can take a while on large files, it is recommended to call
787         * Resize() first on all chunks which have to be resized and finally to
788         * call File::Save() to perform all those resize operations in one rush.
789         *
790         * <b>Caution:</b> You cannot directly write to enlarged chunks before
791         * calling File::Save() as this might exceed the current chunk's body
792         * boundary!
793         *
794         * @param iNewSize - new chunk body size in bytes (must be greater than zero)
795         * @throws RIFF::Exception  if \a iNewSize is less than 1
796         * @see File::Save()
797         */
798        void Chunk::Resize(int iNewSize) {
799            if (iNewSize <= 0)
800                throw Exception("There is at least one empty chunk (zero size): " + __resolveChunkPath(this));
801            if (NewChunkSize == iNewSize) return;
802            NewChunkSize = iNewSize;
803            pFile->LogAsResized(this);
804        }
805    
806        /** @brief Write chunk persistently e.g. to disk.
807         *
808         * Stores the chunk persistently to its actual "physical" file.
809         *
810         * @param ulWritePos - position within the "physical" file where this
811         *                     chunk should be written to
812         * @param ulCurrentDataOffset - offset of current (old) data within
813         *                              the file
814         * @returns new write position in the "physical" file, that is
815         *          \a ulWritePos incremented by this chunk's new size
816         *          (including its header size of course)
817         */
818        unsigned long Chunk::WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset) {
819            const unsigned long ulOriginalPos = ulWritePos;
820            ulWritePos += CHUNK_HEADER_SIZE;
821    
822            if (pFile->Mode != stream_mode_read_write)
823                throw Exception("Cannot write list chunk, file has to be opened in read+write mode");
824    
825            // if the whole chunk body was loaded into RAM
826            if (pChunkData) {
827                // make sure chunk data buffer in RAM is at least as large as the new chunk size
828                LoadChunkData();
829                // write chunk data from RAM persistently to the file
830                #if POSIX
831                lseek(pFile->hFileWrite, ulWritePos, SEEK_SET);
832                if (write(pFile->hFileWrite, pChunkData, NewChunkSize) != NewChunkSize) {
833                    throw Exception("Writing Chunk data (from RAM) failed");
834                }
835                #elif defined(WIN32)
836                SetFilePointer(pFile->hFileWrite, ulWritePos, NULL/*32 bit*/, FILE_BEGIN);
837                DWORD dwBytesWritten;
838                WriteFile(pFile->hFileWrite, pChunkData, NewChunkSize, &dwBytesWritten, NULL);
839                if (dwBytesWritten != NewChunkSize) {
840                    throw Exception("Writing Chunk data (from RAM) failed");
841                }
842                #else
843                fseek(pFile->hFileWrite, ulWritePos, SEEK_SET);
844                if (fwrite(pChunkData, 1, NewChunkSize, pFile->hFileWrite) != NewChunkSize) {
845                    throw Exception("Writing Chunk data (from RAM) failed");
846                }
847                #endif // POSIX
848            } else {
849                // move chunk data from the end of the file to the appropriate position
850                int8_t* pCopyBuffer = new int8_t[4096];
851                unsigned long ulToMove = (NewChunkSize < CurrentChunkSize) ? NewChunkSize : CurrentChunkSize;
852                #if defined(WIN32)
853                DWORD iBytesMoved = 1; // we have to pass it via pointer to the Windows API, thus the correct size must be ensured
854                #else
855                int iBytesMoved = 1;
856                #endif
857                for (unsigned long ulOffset = 0; iBytesMoved > 0; ulOffset += iBytesMoved, ulToMove -= iBytesMoved) {
858                    iBytesMoved = (ulToMove < 4096) ? ulToMove : 4096;
859                    #if POSIX
860                    lseek(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, SEEK_SET);
861                    iBytesMoved = read(pFile->hFileRead, pCopyBuffer, iBytesMoved);
862                    lseek(pFile->hFileWrite, ulWritePos + ulOffset, SEEK_SET);
863                    iBytesMoved = write(pFile->hFileWrite, pCopyBuffer, iBytesMoved);
864                    #elif defined(WIN32)
865                    SetFilePointer(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, NULL/*32 bit*/, FILE_BEGIN);
866                    ReadFile(pFile->hFileRead, pCopyBuffer, iBytesMoved, &iBytesMoved, NULL);
867                    SetFilePointer(pFile->hFileWrite, ulWritePos + ulOffset, NULL/*32 bit*/, FILE_BEGIN);
868                    WriteFile(pFile->hFileWrite, pCopyBuffer, iBytesMoved, &iBytesMoved, NULL);
869                    #else
870                    fseek(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, SEEK_SET);
871                    iBytesMoved = fread(pCopyBuffer, 1, iBytesMoved, pFile->hFileRead);
872                    fseek(pFile->hFileWrite, ulWritePos + ulOffset, SEEK_SET);
873                    iBytesMoved = fwrite(pCopyBuffer, 1, iBytesMoved, pFile->hFileWrite);
874                    #endif
875                }
876                delete[] pCopyBuffer;
877                if (iBytesMoved < 0) throw Exception("Writing Chunk data (from file) failed");
878            }
879    
880            // update this chunk's header
881            CurrentChunkSize = NewChunkSize;
882            WriteHeader(ulOriginalPos);
883    
884            // update chunk's position pointers
885            ulStartPos = ulOriginalPos + CHUNK_HEADER_SIZE;
886            ulPos      = 0;
887    
888            // add pad byte if needed
889            if ((ulStartPos + NewChunkSize) % 2 != 0) {
890                const char cPadByte = 0;
891                #if POSIX
892                lseek(pFile->hFileWrite, ulStartPos + NewChunkSize, SEEK_SET);
893                write(pFile->hFileWrite, &cPadByte, 1);
894                #elif defined(WIN32)
895                SetFilePointer(pFile->hFileWrite, ulStartPos + NewChunkSize, NULL/*32 bit*/, FILE_BEGIN);
896                DWORD dwBytesWritten;
897                WriteFile(pFile->hFileWrite, &cPadByte, 1, &dwBytesWritten, NULL);
898                #else
899                fseek(pFile->hFileWrite, ulStartPos + NewChunkSize, SEEK_SET);
900                fwrite(&cPadByte, 1, 1, pFile->hFileWrite);
901                #endif
902                return ulStartPos + NewChunkSize + 1;
903            }
904    
905            return ulStartPos + NewChunkSize;
906        }
907    
908        void Chunk::__resetPos() {
909            ulPos = 0;
910        }
911    
912    
913    
914  // *************** List ***************  // *************** List ***************
915  // *  // *
916    
917      List::List() : Chunk() {      List::List(File* pFile) : Chunk(pFile) {
918        #if DEBUG        #if DEBUG
919        std::cout << "List::List()" << std::endl;        std::cout << "List::List(File* pFile)" << std::endl;
920        #endif // DEBUG        #endif // DEBUG
921          pSubChunks    = NULL;          pSubChunks    = NULL;
922          pSubChunksMap = NULL;          pSubChunksMap = NULL;
923      }      }
924    
925      #if POSIX      List::List(File* pFile, unsigned long StartPos, List* Parent)
926      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) {  
927          #if DEBUG          #if DEBUG
928          std::cout << "List::List(FILE*,ulong,bool,List*)" << std::endl;          std::cout << "List::List(File*,ulong,bool,List*)" << std::endl;
929          #endif // DEBUG          #endif // DEBUG
930          pSubChunks    = NULL;          pSubChunks    = NULL;
931          pSubChunksMap = NULL;          pSubChunksMap = NULL;
# Line 499  namespace RIFF { Line 933  namespace RIFF {
933          ulStartPos    = StartPos + LIST_HEADER_SIZE;          ulStartPos    = StartPos + LIST_HEADER_SIZE;
934      }      }
935    
936        List::List(File* pFile, List* pParent, uint32_t uiListID)
937          : Chunk(pFile, pParent, CHUNK_ID_LIST, 0) {
938            pSubChunks    = NULL;
939            pSubChunksMap = NULL;
940            ListType      = uiListID;
941        }
942    
943      List::~List() {      List::~List() {
944        #if DEBUG        #if DEBUG
945        std::cout << "List::~List()" << std::endl;        std::cout << "List::~List()" << std::endl;
# Line 642  namespace RIFF { Line 1083  namespace RIFF {
1083      }      }
1084    
1085      /**      /**
1086       *  Returns number subchunks within the list.       *  Returns number of subchunks within the list.
1087       */       */
1088      unsigned int List::CountSubChunks() {      unsigned int List::CountSubChunks() {
1089          if (!pSubChunks) LoadSubChunks();          if (!pSubChunks) LoadSubChunks();
# Line 693  namespace RIFF { Line 1134  namespace RIFF {
1134          return result;          return result;
1135      }      }
1136    
1137        /** @brief Creates a new sub chunk.
1138         *
1139         * Creates and adds a new sub chunk to this list chunk. Note that the
1140         * chunk's body size given by \a uiBodySize must be greater than zero.
1141         * You have to call File::Save() to make this change persistent to the
1142         * actual file and <b>before</b> performing any data write operations
1143         * on the new chunk!
1144         *
1145         * @param uiChunkID  - chunk ID of the new chunk
1146         * @param uiBodySize - size of the new chunk's body, that is its actual
1147         *                     data size (without header)
1148         * @throws RIFF::Exception if \a uiBodySize equals zero
1149         */
1150        Chunk* List::AddSubChunk(uint32_t uiChunkID, uint uiBodySize) {
1151            if (uiBodySize == 0) throw Exception("Chunk body size must be at least 1 byte");
1152            if (!pSubChunks) LoadSubChunks();
1153            Chunk* pNewChunk = new Chunk(pFile, this, uiChunkID, 0);
1154            pSubChunks->push_back(pNewChunk);
1155            (*pSubChunksMap)[uiChunkID] = pNewChunk;
1156            pNewChunk->Resize(uiBodySize);
1157            NewChunkSize += CHUNK_HEADER_SIZE;
1158            pFile->LogAsResized(this);
1159            return pNewChunk;
1160        }
1161    
1162        /** @brief Moves a sub chunk.
1163         *
1164         * Moves a sub chunk from one position in a list to another
1165         * position in the same list. The pSrc chunk is placed before the
1166         * pDst chunk.
1167         *
1168         * @param pSrc - sub chunk to be moved
1169         * @param pDst - the position to move to. pSrc will be placed
1170         *               before pDst. If pDst is 0, pSrc will be placed
1171         *               last in list.
1172         */
1173        void List::MoveSubChunk(Chunk* pSrc, Chunk* pDst) {
1174            if (!pSubChunks) LoadSubChunks();
1175            pSubChunks->remove(pSrc);
1176            ChunkList::iterator iter = find(pSubChunks->begin(), pSubChunks->end(), pDst);
1177            pSubChunks->insert(iter, pSrc);
1178        }
1179    
1180        /** @brief Creates a new list sub chunk.
1181         *
1182         * Creates and adds a new list sub chunk to this list chunk. Note that
1183         * you have to add sub chunks / sub list chunks to the new created chunk
1184         * <b>before</b> trying to make this change persisten to the actual
1185         * file with File::Save()!
1186         *
1187         * @param uiListType - list ID of the new list chunk
1188         */
1189        List* List::AddSubList(uint32_t uiListType) {
1190            if (!pSubChunks) LoadSubChunks();
1191            List* pNewListChunk = new List(pFile, this, uiListType);
1192            pSubChunks->push_back(pNewListChunk);
1193            (*pSubChunksMap)[CHUNK_ID_LIST] = pNewListChunk;
1194            NewChunkSize += LIST_HEADER_SIZE;
1195            pFile->LogAsResized(this);
1196            return pNewListChunk;
1197        }
1198    
1199        /** @brief Removes a sub chunk.
1200         *
1201         * Removes the sub chunk given by \a pSubChunk from this list and frees
1202         * it completely from RAM. The given chunk can either be a normal sub
1203         * chunk or a list sub chunk. In case the given chunk is a list chunk,
1204         * all its subchunks (if any) will be removed recursively as well. You
1205         * should call File::Save() to make this change persistent at any time.
1206         *
1207         * @param pSubChunk - sub chunk or sub list chunk to be removed
1208         */
1209        void List::DeleteSubChunk(Chunk* pSubChunk) {
1210            if (!pSubChunks) LoadSubChunks();
1211            pSubChunks->remove(pSubChunk);
1212            if ((*pSubChunksMap)[pSubChunk->GetChunkID()] == pSubChunk) {
1213                pSubChunksMap->erase(pSubChunk->GetChunkID());
1214                // try to find another chunk of the same chunk ID
1215                ChunkList::iterator iter = pSubChunks->begin();
1216                ChunkList::iterator end  = pSubChunks->end();
1217                for (; iter != end; ++iter) {
1218                    if ((*iter)->GetChunkID() == pSubChunk->GetChunkID()) {
1219                        (*pSubChunksMap)[pSubChunk->GetChunkID()] = *iter;
1220                        break; // we're done, stop search
1221                    }
1222                }
1223            }
1224            delete pSubChunk;
1225        }
1226    
1227      void List::ReadHeader(unsigned long fPos) {      void List::ReadHeader(unsigned long fPos) {
1228        #if DEBUG        #if DEBUG
1229        std::cout << "List::Readheader(ulong) ";        std::cout << "List::Readheader(ulong) ";
1230        #endif // DEBUG        #endif // DEBUG
1231          Chunk::ReadHeader(fPos);          Chunk::ReadHeader(fPos);
1232          ChunkSize -= 4;          NewChunkSize = CurrentChunkSize -= 4;
1233          #if POSIX          #if POSIX
1234          lseek(hFile, fPos + CHUNK_HEADER_SIZE, SEEK_SET);          lseek(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
1235          read(hFile, &ListType, 4);          read(pFile->hFileRead, &ListType, 4);
1236            #elif defined(WIN32)
1237            SetFilePointer(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, NULL/*32 bit*/, FILE_BEGIN);
1238            DWORD dwBytesRead;
1239            ReadFile(pFile->hFileRead, &ListType, 4, &dwBytesRead, NULL);
1240          #else          #else
1241          fseek(hFile, fPos + CHUNK_HEADER_SIZE, SEEK_SET);          fseek(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
1242          fread(&ListType, 4, 1, hFile);          fread(&ListType, 4, 1, pFile->hFileRead);
1243          #endif // POSIX          #endif // POSIX
1244        #if DEBUG        #if DEBUG
1245        std::cout << "listType=" << convertToString(ListType) << std::endl;        std::cout << "listType=" << convertToString(ListType) << std::endl;
1246        #endif // DEBUG        #endif // DEBUG
1247          if (!bEndianNative) {          if (!pFile->bEndianNative) {
1248              //swapBytes_32(&ListType);              //swapBytes_32(&ListType);
1249          }          }
1250      }      }
1251    
1252        void List::WriteHeader(unsigned long fPos) {
1253            // the four list type bytes officially belong the chunk's body in the RIFF format
1254            NewChunkSize += 4;
1255            Chunk::WriteHeader(fPos);
1256            NewChunkSize -= 4; // just revert the +4 incrementation
1257            #if POSIX
1258            lseek(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
1259            write(pFile->hFileWrite, &ListType, 4);
1260            #elif defined(WIN32)
1261            SetFilePointer(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, NULL/*32 bit*/, FILE_BEGIN);
1262            DWORD dwBytesWritten;
1263            WriteFile(pFile->hFileWrite, &ListType, 4, &dwBytesWritten, NULL);
1264            #else
1265            fseek(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
1266            fwrite(&ListType, 4, 1, pFile->hFileWrite);
1267            #endif // POSIX
1268        }
1269    
1270      void List::LoadSubChunks() {      void List::LoadSubChunks() {
1271         #if DEBUG         #if DEBUG
1272         std::cout << "List::LoadSubChunks()";         std::cout << "List::LoadSubChunks()";
# Line 721  namespace RIFF { Line 1274  namespace RIFF {
1274          if (!pSubChunks) {          if (!pSubChunks) {
1275              pSubChunks    = new ChunkList();              pSubChunks    = new ChunkList();
1276              pSubChunksMap = new ChunkMap();              pSubChunksMap = new ChunkMap();
1277                #if defined(WIN32)
1278                if (pFile->hFileRead == INVALID_HANDLE_VALUE) return;
1279                #else
1280                if (!pFile->hFileRead) return;
1281                #endif
1282                unsigned long uiOriginalPos = GetPos();
1283                SetPos(0); // jump to beginning of list chunk body
1284              while (RemainingBytes() >= CHUNK_HEADER_SIZE) {              while (RemainingBytes() >= CHUNK_HEADER_SIZE) {
1285                  Chunk* ck;                  Chunk* ck;
1286                  uint32_t ckid;                  uint32_t ckid;
# Line 729  namespace RIFF { Line 1289  namespace RIFF {
1289         std::cout << " ckid=" << convertToString(ckid) << std::endl;         std::cout << " ckid=" << convertToString(ckid) << std::endl;
1290         #endif // DEBUG         #endif // DEBUG
1291                  if (ckid == CHUNK_ID_LIST) {                  if (ckid == CHUNK_ID_LIST) {
1292                      ck = new RIFF::List(hFile, ulStartPos + ulPos - 4, bEndianNative, this);                      ck = new RIFF::List(pFile, ulStartPos + ulPos - 4, this);
1293                      SetPos(ck->GetSize() + LIST_HEADER_SIZE - 4, RIFF::stream_curpos);                      SetPos(ck->GetSize() + LIST_HEADER_SIZE - 4, RIFF::stream_curpos);
1294                  }                  }
1295                  else { // simple chunk                  else { // simple chunk
1296                      ck = new RIFF::Chunk(hFile, ulStartPos + ulPos - 4, bEndianNative, this);                      ck = new RIFF::Chunk(pFile, ulStartPos + ulPos - 4, this);
1297                      SetPos(ck->GetSize() + CHUNK_HEADER_SIZE - 4, RIFF::stream_curpos);                      SetPos(ck->GetSize() + CHUNK_HEADER_SIZE - 4, RIFF::stream_curpos);
1298                  }                  }
1299                  pSubChunks->push_back(ck);                  pSubChunks->push_back(ck);
1300                  (*pSubChunksMap)[ckid] = ck;                  (*pSubChunksMap)[ckid] = ck;
1301                  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
1302              }              }
1303                SetPos(uiOriginalPos); // restore position before this call
1304            }
1305        }
1306    
1307        void List::LoadSubChunksRecursively() {
1308            for (List* pList = GetFirstSubList(); pList; pList = GetNextSubList())
1309                pList->LoadSubChunksRecursively();
1310        }
1311    
1312        /** @brief Write list chunk persistently e.g. to disk.
1313         *
1314         * Stores the list chunk persistently to its actual "physical" file. All
1315         * subchunks (including sub list chunks) will be stored recursively as
1316         * well.
1317         *
1318         * @param ulWritePos - position within the "physical" file where this
1319         *                     list chunk should be written to
1320         * @param ulCurrentDataOffset - offset of current (old) data within
1321         *                              the file
1322         * @returns new write position in the "physical" file, that is
1323         *          \a ulWritePos incremented by this list chunk's new size
1324         *          (including its header size of course)
1325         */
1326        unsigned long List::WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset) {
1327            const unsigned long ulOriginalPos = ulWritePos;
1328            ulWritePos += LIST_HEADER_SIZE;
1329    
1330            if (pFile->Mode != stream_mode_read_write)
1331                throw Exception("Cannot write list chunk, file has to be opened in read+write mode");
1332    
1333            // write all subchunks (including sub list chunks) recursively
1334            if (pSubChunks) {
1335                for (ChunkList::iterator iter = pSubChunks->begin(), end = pSubChunks->end(); iter != end; ++iter) {
1336                    ulWritePos = (*iter)->WriteChunk(ulWritePos, ulCurrentDataOffset);
1337                }
1338            }
1339    
1340            // update this list chunk's header
1341            CurrentChunkSize = NewChunkSize = ulWritePos - ulOriginalPos - LIST_HEADER_SIZE;
1342            WriteHeader(ulOriginalPos);
1343    
1344            // offset of this list chunk in new written file may have changed
1345            ulStartPos = ulOriginalPos + LIST_HEADER_SIZE;
1346    
1347            return ulWritePos;
1348        }
1349    
1350        void List::__resetPos() {
1351            Chunk::__resetPos();
1352            if (pSubChunks) {
1353                for (ChunkList::iterator iter = pSubChunks->begin(), end = pSubChunks->end(); iter != end; ++iter) {
1354                    (*iter)->__resetPos();
1355                }
1356          }          }
1357      }      }
1358    
# Line 755  namespace RIFF { Line 1368  namespace RIFF {
1368  // *************** File ***************  // *************** File ***************
1369  // *  // *
1370    
1371      File::File(const String& path) : List() {      /** @brief Create new RIFF file.
1372         *
1373         * Use this constructor if you want to create a new RIFF file completely
1374         * "from scratch". Note: there must be no empty chunks or empty list
1375         * chunks when trying to make the new RIFF file persistent with Save()!
1376         *
1377         * Note: by default, the RIFF file will be saved in native endian
1378         * format; that is, as a RIFF file on little-endian machines and
1379         * as a RIFX file on big-endian. To change this behaviour, call
1380         * SetByteOrder() before calling Save().
1381         *
1382         * @param FileType - four-byte identifier of the RIFF file type
1383         * @see AddSubChunk(), AddSubList(), SetByteOrder()
1384         */
1385        File::File(uint32_t FileType) : List(this) {
1386            #if defined(WIN32)
1387            hFileRead = hFileWrite = INVALID_HANDLE_VALUE;
1388            #else
1389            hFileRead = hFileWrite = 0;
1390            #endif
1391            Mode = stream_mode_closed;
1392            bEndianNative = true;
1393            ulStartPos = RIFF_HEADER_SIZE;
1394            ListType = FileType;
1395        }
1396    
1397        /** @brief Load existing RIFF file.
1398         *
1399         * Loads an existing RIFF file with all its chunks.
1400         *
1401         * @param path - path and file name of the RIFF file to open
1402         * @throws RIFF::Exception if error occured while trying to load the
1403         *                         given RIFF file
1404         */
1405        File::File(const String& path) : List(this), Filename(path) {
1406        #if DEBUG        #if DEBUG
1407        std::cout << "File::File("<<path<<")" << std::endl;        std::cout << "File::File("<<path<<")" << std::endl;
1408        #endif // DEBUG        #endif // DEBUG
1409          bEndianNative = true;          bEndianNative = true;
1410          #if POSIX          #if POSIX
1411          hFile = open(path.c_str(), O_RDONLY | O_NONBLOCK);          hFileRead = hFileWrite = open(path.c_str(), O_RDONLY | O_NONBLOCK);
1412          if (hFile <= 0) {          if (hFileRead <= 0) {
1413              hFile = 0;              hFileRead = hFileWrite = 0;
1414                throw RIFF::Exception("Can't open \"" + path + "\"");
1415            }
1416            #elif defined(WIN32)
1417            hFileRead = hFileWrite = CreateFile(
1418                                         path.c_str(), GENERIC_READ,
1419                                         FILE_SHARE_READ | FILE_SHARE_WRITE,
1420                                         NULL, OPEN_EXISTING,
1421                                         FILE_ATTRIBUTE_NORMAL |
1422                                         FILE_FLAG_RANDOM_ACCESS, NULL
1423                                     );
1424            if (hFileRead == INVALID_HANDLE_VALUE) {
1425                hFileRead = hFileWrite = INVALID_HANDLE_VALUE;
1426              throw RIFF::Exception("Can't open \"" + path + "\"");              throw RIFF::Exception("Can't open \"" + path + "\"");
1427          }          }
1428          #else          #else
1429          hFile = fopen(path.c_str(), "rb");          hFileRead = hFileWrite = fopen(path.c_str(), "rb");
1430          if (!hFile) throw RIFF::Exception("Can't open \"" + path + "\"");          if (!hFileRead) throw RIFF::Exception("Can't open \"" + path + "\"");
1431          #endif // POSIX          #endif // POSIX
1432            Mode = stream_mode_read;
1433          ulStartPos = RIFF_HEADER_SIZE;          ulStartPos = RIFF_HEADER_SIZE;
1434          ReadHeader(0);          ReadHeader(0);
1435          if (ChunkID != CHUNK_ID_RIFF) {          if (ChunkID != CHUNK_ID_RIFF) {
# Line 777  namespace RIFF { Line 1437  namespace RIFF {
1437          }          }
1438      }      }
1439    
1440        String File::GetFileName() {
1441            return Filename;
1442        }
1443    
1444        stream_mode_t File::GetMode() {
1445            return Mode;
1446        }
1447    
1448        /** @brief Change file access mode.
1449         *
1450         * Changes files access mode either to read-only mode or to read/write
1451         * mode.
1452         *
1453         * @param NewMode - new file access mode
1454         * @returns true if mode was changed, false if current mode already
1455         *          equals new mode
1456         * @throws RIFF::Exception if new file access mode is unknown
1457         */
1458        bool File::SetMode(stream_mode_t NewMode) {
1459            if (NewMode != Mode) {
1460                switch (NewMode) {
1461                    case stream_mode_read:
1462                        #if POSIX
1463                        if (hFileRead) close(hFileRead);
1464                        hFileRead = hFileWrite = open(Filename.c_str(), O_RDONLY | O_NONBLOCK);
1465                        if (hFileRead < 0) {
1466                            hFileRead = hFileWrite = 0;
1467                            throw Exception("Could not (re)open file \"" + Filename + "\" in read mode");
1468                        }
1469                        #elif defined(WIN32)
1470                        if (hFileRead != INVALID_HANDLE_VALUE) CloseHandle(hFileRead);
1471                        hFileRead = hFileWrite = CreateFile(
1472                                                     Filename.c_str(), GENERIC_READ,
1473                                                     FILE_SHARE_READ | FILE_SHARE_WRITE,
1474                                                     NULL, OPEN_EXISTING,
1475                                                     FILE_ATTRIBUTE_NORMAL |
1476                                                     FILE_FLAG_RANDOM_ACCESS,
1477                                                     NULL
1478                                                 );
1479                        if (hFileRead == INVALID_HANDLE_VALUE) {
1480                            hFileRead = hFileWrite = INVALID_HANDLE_VALUE;
1481                            throw Exception("Could not (re)open file \"" + Filename + "\" in read mode");
1482                        }
1483                        #else
1484                        if (hFileRead) fclose(hFileRead);
1485                        hFileRead = hFileWrite = fopen(Filename.c_str(), "rb");
1486                        if (!hFileRead) throw Exception("Could not (re)open file \"" + Filename + "\" in read mode");
1487                        #endif
1488                        __resetPos(); // reset read/write position of ALL 'Chunk' objects
1489                        break;
1490                    case stream_mode_read_write:
1491                        #if POSIX
1492                        if (hFileRead) close(hFileRead);
1493                        hFileRead = hFileWrite = open(Filename.c_str(), O_RDWR | O_NONBLOCK);
1494                        if (hFileRead < 0) {
1495                            hFileRead = hFileWrite = open(Filename.c_str(), O_RDONLY | O_NONBLOCK);
1496                            throw Exception("Could not open file \"" + Filename + "\" in read+write mode");
1497                        }
1498                        #elif defined(WIN32)
1499                        if (hFileRead != INVALID_HANDLE_VALUE) CloseHandle(hFileRead);
1500                        hFileRead = hFileWrite = CreateFile(
1501                                                     Filename.c_str(),
1502                                                     GENERIC_READ | GENERIC_WRITE,
1503                                                     FILE_SHARE_READ,
1504                                                     NULL, OPEN_ALWAYS,
1505                                                     FILE_ATTRIBUTE_NORMAL |
1506                                                     FILE_FLAG_RANDOM_ACCESS,
1507                                                     NULL
1508                                                 );
1509                        if (hFileRead == INVALID_HANDLE_VALUE) {
1510                            hFileRead = hFileWrite = CreateFile(
1511                                                         Filename.c_str(), GENERIC_READ,
1512                                                         FILE_SHARE_READ | FILE_SHARE_WRITE,
1513                                                         NULL, OPEN_EXISTING,
1514                                                         FILE_ATTRIBUTE_NORMAL |
1515                                                         FILE_FLAG_RANDOM_ACCESS,
1516                                                         NULL
1517                                                     );
1518                            throw Exception("Could not (re)open file \"" + Filename + "\" in read+write mode");
1519                        }
1520                        #else
1521                        if (hFileRead) fclose(hFileRead);
1522                        hFileRead = hFileWrite = fopen(Filename.c_str(), "r+b");
1523                        if (!hFileRead) {
1524                            hFileRead = hFileWrite = fopen(Filename.c_str(), "rb");
1525                            throw Exception("Could not open file \"" + Filename + "\" in read+write mode");
1526                        }
1527                        #endif
1528                        __resetPos(); // reset read/write position of ALL 'Chunk' objects
1529                        break;
1530                    case stream_mode_closed:
1531                        #if POSIX
1532                        if (hFileRead)  close(hFileRead);
1533                        if (hFileWrite) close(hFileWrite);
1534                        #elif defined(WIN32)
1535                        if (hFileRead  != INVALID_HANDLE_VALUE) CloseHandle(hFileRead);
1536                        if (hFileWrite != INVALID_HANDLE_VALUE) CloseHandle(hFileWrite);
1537                        #else
1538                        if (hFileRead)  fclose(hFileRead);
1539                        if (hFileWrite) fclose(hFileWrite);
1540                        #endif
1541                        hFileRead = hFileWrite = 0;
1542                        break;
1543                    default:
1544                        throw Exception("Unknown file access mode");
1545                }
1546                Mode = NewMode;
1547                return true;
1548            }
1549            return false;
1550        }
1551    
1552        /** @brief Set the byte order to be used when saving.
1553         *
1554         * Set the byte order to be used in the file. A value of
1555         * endian_little will create a RIFF file, endian_big a RIFX file
1556         * and endian_native will create a RIFF file on little-endian
1557         * machines and RIFX on big-endian machines.
1558         *
1559         * @param Endian - endianess to use when file is saved.
1560         */
1561        void File::SetByteOrder(endian_t Endian) {
1562            #if WORDS_BIGENDIAN
1563            bEndianNative = Endian != endian_little;
1564            #else
1565            bEndianNative = Endian != endian_big;
1566            #endif
1567        }
1568    
1569        /** @brief Save changes to same file.
1570         *
1571         * Make all changes of all chunks persistent by writing them to the
1572         * actual (same) file. The file might temporarily grow to a higher size
1573         * than it will have at the end of the saving process, in case chunks
1574         * were grown.
1575         *
1576         * @throws RIFF::Exception if there is an empty chunk or empty list
1577         *                         chunk or any kind of IO error occured
1578         */
1579        void File::Save() {
1580            // make sure the RIFF tree is built (from the original file)
1581            LoadSubChunksRecursively();
1582    
1583            // reopen file in write mode
1584            SetMode(stream_mode_read_write);
1585    
1586            // to be able to save the whole file without loading everything into
1587            // RAM and without having to store the data in a temporary file, we
1588            // enlarge the file with the sum of all _positive_ chunk size
1589            // changes, move current data towards the end of the file with the
1590            // calculated sum and finally update / rewrite the file by copying
1591            // the old data back to the right position at the beginning of the file
1592    
1593            // first we sum up all positive chunk size changes (and skip all negative ones)
1594            unsigned long ulPositiveSizeDiff = 0;
1595            for (std::set<Chunk*>::const_iterator iter = ResizedChunks.begin(), end = ResizedChunks.end(); iter != end; ++iter) {
1596                if ((*iter)->GetNewSize() == 0) {
1597                    throw Exception("There is at least one empty chunk (zero size): " + __resolveChunkPath(*iter));
1598                }
1599                unsigned long newSizePadded = (*iter)->GetNewSize() + (*iter)->GetNewSize() % 2;
1600                unsigned long oldSizePadded = (*iter)->GetSize() + (*iter)->GetSize() % 2;
1601                if (newSizePadded > oldSizePadded) ulPositiveSizeDiff += newSizePadded - oldSizePadded;
1602            }
1603    
1604            unsigned long ulWorkingFileSize = GetFileSize();
1605    
1606            // if there are positive size changes...
1607            if (ulPositiveSizeDiff > 0) {
1608                // ... we enlarge this file first ...
1609                ulWorkingFileSize += ulPositiveSizeDiff;
1610                ResizeFile(ulWorkingFileSize);
1611                // ... and move current data by the same amount towards end of file.
1612                int8_t* pCopyBuffer = new int8_t[4096];
1613                const unsigned long ulFileSize = GetSize() + RIFF_HEADER_SIZE;
1614                #if defined(WIN32)
1615                DWORD iBytesMoved = 1; // we have to pass it via pointer to the Windows API, thus the correct size must be ensured
1616                #else
1617                int iBytesMoved = 1;
1618                #endif
1619                for (unsigned long ulPos = ulFileSize; iBytesMoved > 0; ) {
1620                    iBytesMoved = (ulPos < 4096) ? ulPos : 4096;
1621                    ulPos -= iBytesMoved;
1622                    #if POSIX
1623                    lseek(hFileRead, ulPos, SEEK_SET);
1624                    iBytesMoved = read(hFileRead, pCopyBuffer, iBytesMoved);
1625                    lseek(hFileWrite, ulPos + ulPositiveSizeDiff, SEEK_SET);
1626                    iBytesMoved = write(hFileWrite, pCopyBuffer, iBytesMoved);
1627                    #elif defined(WIN32)
1628                    SetFilePointer(hFileRead, ulPos, NULL/*32 bit*/, FILE_BEGIN);
1629                    ReadFile(hFileRead, pCopyBuffer, iBytesMoved, &iBytesMoved, NULL);
1630                    SetFilePointer(hFileWrite, ulPos + ulPositiveSizeDiff, NULL/*32 bit*/, FILE_BEGIN);
1631                    WriteFile(hFileWrite, pCopyBuffer, iBytesMoved, &iBytesMoved, NULL);
1632                    #else
1633                    fseek(hFileRead, ulPos, SEEK_SET);
1634                    iBytesMoved = fread(pCopyBuffer, 1, iBytesMoved, hFileRead);
1635                    fseek(hFileWrite, ulPos + ulPositiveSizeDiff, SEEK_SET);
1636                    iBytesMoved = fwrite(pCopyBuffer, 1, iBytesMoved, hFileWrite);
1637                    #endif
1638                }
1639                delete[] pCopyBuffer;
1640                if (iBytesMoved < 0) throw Exception("Could not modify file while trying to enlarge it");
1641            }
1642    
1643            // rebuild / rewrite complete RIFF tree
1644            unsigned long ulTotalSize  = WriteChunk(0, ulPositiveSizeDiff);
1645            unsigned long ulActualSize = __GetFileSize(hFileWrite);
1646    
1647            // resize file to the final size
1648            if (ulTotalSize < ulActualSize) ResizeFile(ulTotalSize);
1649    
1650            // forget all resized chunks
1651            ResizedChunks.clear();
1652        }
1653    
1654        /** @brief Save changes to another file.
1655         *
1656         * Make all changes of all chunks persistent by writing them to another
1657         * file. <b>Caution:</b> this method is optimized for writing to
1658         * <b>another</b> file, do not use it to save the changes to the same
1659         * file! Use File::Save() in that case instead! Ignoring this might
1660         * result in a corrupted file, especially in case chunks were resized!
1661         *
1662         * After calling this method, this File object will be associated with
1663         * the new file (given by \a path) afterwards.
1664         *
1665         * @param path - path and file name where everything should be written to
1666         */
1667        void File::Save(const String& path) {
1668            //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
1669    
1670            // make sure the RIFF tree is built (from the original file)
1671            LoadSubChunksRecursively();
1672    
1673            if (Filename.length() > 0) SetMode(stream_mode_read);
1674            // open the other (new) file for writing and truncate it to zero size
1675            #if POSIX
1676            hFileWrite = open(path.c_str(), O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP);
1677            if (hFileWrite < 0) {
1678                hFileWrite = hFileRead;
1679                throw Exception("Could not open file \"" + path + "\" for writing");
1680            }
1681            #elif defined(WIN32)
1682            hFileWrite = CreateFile(
1683                             path.c_str(), GENERIC_WRITE, FILE_SHARE_READ,
1684                             NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL |
1685                             FILE_FLAG_RANDOM_ACCESS, NULL
1686                         );
1687            if (hFileWrite == INVALID_HANDLE_VALUE) {
1688                hFileWrite = hFileRead;
1689                throw Exception("Could not open file \"" + path + "\" for writing");
1690            }
1691            #else
1692            hFileWrite = fopen(path.c_str(), "w+b");
1693            if (!hFileWrite) {
1694                hFileWrite = hFileRead;
1695                throw Exception("Could not open file \"" + path + "\" for writing");
1696            }
1697            #endif // POSIX
1698            Mode = stream_mode_read_write;
1699    
1700            // write complete RIFF tree to the other (new) file
1701            unsigned long ulTotalSize  = WriteChunk(0, 0);
1702            unsigned long ulActualSize = __GetFileSize(hFileWrite);
1703    
1704            // resize file to the final size (if the file was originally larger)
1705            if (ulTotalSize < ulActualSize) ResizeFile(ulTotalSize);
1706    
1707            // forget all resized chunks
1708            ResizedChunks.clear();
1709    
1710            #if POSIX
1711            if (hFileWrite) close(hFileWrite);
1712            #elif defined(WIN32)
1713            if (hFileWrite != INVALID_HANDLE_VALUE) CloseHandle(hFileWrite);
1714            #else
1715            if (hFileWrite) fclose(hFileWrite);
1716            #endif
1717            hFileWrite = hFileRead;
1718    
1719            // associate new file with this File object from now on
1720            Filename = path;
1721            Mode = (stream_mode_t) -1;       // Just set it to an undefined mode ...
1722            SetMode(stream_mode_read_write); // ... so SetMode() has to reopen the file handles.
1723        }
1724    
1725        void File::ResizeFile(unsigned long ulNewSize) {
1726            #if POSIX
1727            if (ftruncate(hFileWrite, ulNewSize) < 0)
1728                throw Exception("Could not resize file \"" + Filename + "\"");
1729            #elif defined(WIN32)
1730            if (
1731                SetFilePointer(hFileWrite, ulNewSize, NULL/*32 bit*/, FILE_BEGIN) == INVALID_SET_FILE_POINTER ||
1732                !SetEndOfFile(hFileWrite)
1733            ) throw Exception("Could not resize file \"" + Filename + "\"");
1734            #else
1735            # error Sorry, this version of libgig only supports POSIX and Windows systems yet.
1736            # error Reason: portable implementation of RIFF::File::ResizeFile() is missing (yet)!
1737            #endif
1738        }
1739    
1740      File::~File() {      File::~File() {
1741         #if DEBUG         #if DEBUG
1742         std::cout << "File::~File()" << std::endl;         std::cout << "File::~File()" << std::endl;
1743         #endif // DEBUG         #endif // DEBUG
1744          #if POSIX          #if POSIX
1745          if (hFile) close(hFile);          if (hFileRead) close(hFileRead);
1746            #elif defined(WIN32)
1747            if (hFileRead != INVALID_HANDLE_VALUE) CloseHandle(hFileRead);
1748          #else          #else
1749          if (hFile) fclose(hFile);          if (hFileRead) fclose(hFileRead);
1750          #endif // POSIX          #endif // POSIX
1751      }      }
1752    
1753        void File::LogAsResized(Chunk* pResizedChunk) {
1754            ResizedChunks.insert(pResizedChunk);
1755        }
1756    
1757        void File::UnlogResized(Chunk* pResizedChunk) {
1758            ResizedChunks.erase(pResizedChunk);
1759        }
1760    
1761      unsigned long File::GetFileSize() {      unsigned long File::GetFileSize() {
1762          #if POSIX          return __GetFileSize(hFileRead);
1763        }
1764    
1765        #if POSIX
1766        unsigned long File::__GetFileSize(int hFile) {
1767          struct stat filestat;          struct stat filestat;
1768          fstat(hFile, &filestat);          fstat(hFile, &filestat);
1769          long size = filestat.st_size;          long size = filestat.st_size;
1770          #else // standard C functions          return size;
1771        }
1772        #elif defined(WIN32)
1773        unsigned long File::__GetFileSize(HANDLE hFile) {
1774            DWORD dwSize = ::GetFileSize(hFile, NULL /*32bit*/);
1775            if (dwSize == INVALID_FILE_SIZE)
1776                throw Exception("Windows FS error: could not determine file size");
1777            return dwSize;
1778        }
1779        #else // standard C functions
1780        unsigned long File::__GetFileSize(FILE* hFile) {
1781          long curpos = ftell(hFile);          long curpos = ftell(hFile);
1782          fseek(hFile, 0, SEEK_END);          fseek(hFile, 0, SEEK_END);
1783          long size = ftell(hFile);          long size = ftell(hFile);
1784          fseek(hFile, curpos, SEEK_SET);          fseek(hFile, curpos, SEEK_SET);
         #endif // POSIX  
1785          return size;          return size;
1786      }      }
1787        #endif
1788    
1789    
1790  // *************** Exception ***************  // *************** Exception ***************
# Line 811  namespace RIFF { Line 1794  namespace RIFF {
1794          std::cout << "RIFF::Exception: " << Message << std::endl;          std::cout << "RIFF::Exception: " << Message << std::endl;
1795      }      }
1796    
1797    
1798    // *************** functions ***************
1799    // *
1800    
1801        /**
1802         * Returns the name of this C++ library. This is usually "libgig" of
1803         * course. This call is equivalent to DLS::libraryName() and
1804         * gig::libraryName().
1805         */
1806        String libraryName() {
1807            return PACKAGE;
1808        }
1809    
1810        /**
1811         * Returns version of this C++ library. This call is equivalent to
1812         * DLS::libraryVersion() and gig::libraryVersion().
1813         */
1814        String libraryVersion() {
1815            return VERSION;
1816        }
1817    
1818  } // namespace RIFF  } // namespace RIFF
 #endif  
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