/[svn]/libgig/trunk/src/RIFF.cpp
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revision 1183 by persson, Sun May 13 10:34:29 2007 UTC revision 1383 by schoenebeck, Fri Oct 5 09:39:12 2007 UTC
# Line 33  namespace RIFF { Line 33  namespace RIFF {
33  // *  // *
34    
35      /// Returns a human readable path of the given chunk.      /// Returns a human readable path of the given chunk.
36      String __resolveChunkPath(Chunk* pCk) {      static String __resolveChunkPath(Chunk* pCk) {
37          String sPath;          String sPath;
38          for (Chunk* pChunk = pCk; pChunk; pChunk = pChunk->GetParent()) {          for (Chunk* pChunk = pCk; pChunk; pChunk = pChunk->GetParent()) {
39              if (pChunk->GetChunkID() == CHUNK_ID_LIST) {              if (pChunk->GetChunkID() == CHUNK_ID_LIST) {
# Line 235  namespace RIFF { Line 235  namespace RIFF {
235       *  - RIFF::stream_closed :       *  - RIFF::stream_closed :
236       *    the data stream was closed somehow, no more reading possible       *    the data stream was closed somehow, no more reading possible
237       *  - RIFF::stream_end_reached :       *  - RIFF::stream_end_reached :
238       *    alreaady reached the end of the chunk data, no more reading       *    already reached the end of the chunk data, no more reading
239       *    possible without SetPos()       *    possible without SetPos()
240       */       */
241      stream_state_t Chunk::GetState() {      stream_state_t Chunk::GetState() {
# Line 1268  namespace RIFF { Line 1268  namespace RIFF {
1268          if (!pSubChunks) {          if (!pSubChunks) {
1269              pSubChunks    = new ChunkList();              pSubChunks    = new ChunkList();
1270              pSubChunksMap = new ChunkMap();              pSubChunksMap = new ChunkMap();
1271                #if defined(WIN32)
1272                if (pFile->hFileRead == INVALID_HANDLE_VALUE) return;
1273                #else
1274              if (!pFile->hFileRead) return;              if (!pFile->hFileRead) return;
1275                #endif
1276              unsigned long uiOriginalPos = GetPos();              unsigned long uiOriginalPos = GetPos();
1277              SetPos(0); // jump to beginning of list chunk body              SetPos(0); // jump to beginning of list chunk body
1278              while (RemainingBytes() >= CHUNK_HEADER_SIZE) {              while (RemainingBytes() >= CHUNK_HEADER_SIZE) {
# Line 1363  namespace RIFF { Line 1367  namespace RIFF {
1367       * Use this constructor if you want to create a new RIFF file completely       * Use this constructor if you want to create a new RIFF file completely
1368       * "from scratch". Note: there must be no empty chunks or empty list       * "from scratch". Note: there must be no empty chunks or empty list
1369       * chunks when trying to make the new RIFF file persistent with Save()!       * chunks when trying to make the new RIFF file persistent with Save()!
1370       * Note that this constructor will create a RIFX file on       *
1371       * big-endian machines.       * Note: by default, the RIFF file will be saved in native endian
1372         * format; that is, as a RIFF file on little-endian machines and
1373         * as a RIFX file on big-endian. To change this behaviour, call
1374         * SetByteOrder() before calling Save().
1375       *       *
1376       * @param FileType - four-byte identifier of the RIFF file type       * @param FileType - four-byte identifier of the RIFF file type
1377       * @see AddSubChunk(), AddSubList()       * @see AddSubChunk(), AddSubList(), SetByteOrder()
1378       */       */
1379      File::File(uint32_t FileType) : List(this) {      File::File(uint32_t FileType) : List(this) {
1380          #if defined(WIN32)          #if defined(WIN32)
# Line 1381  namespace RIFF { Line 1388  namespace RIFF {
1388          ListType = FileType;          ListType = FileType;
1389      }      }
1390    
   
     /** @brief Create new RIFF file.  
      *  
      * Use this constructor if you want to create a new RIFF file  
      * completely "from scratch" and also want to specify  
      * endianess. Note: there must be no empty chunks or empty list  
      * chunks when trying to make the new RIFF file persistent with  
      * Save()!  
      *  
      * @param FileType - four-byte identifier of the RIFF file type  
      * @param Endian - endianess used in the new file. A value of  
      *                 endian_little will create a RIFF file,  
      *                 endian_big a RIFX file, endian_native will  
      *                 create a RIFF file on little-endian machines  
      *                 and RIFX on big-endian.  
      * @see AddSubChunk(), AddSubList()  
      */  
     File::File(uint32_t FileType, endian_t Endian) : List(this) {  
         #if defined(WIN32)  
         hFileRead = hFileWrite = INVALID_HANDLE_VALUE;  
         #else  
         hFileRead = hFileWrite = 0;  
         #endif  
         Mode = stream_mode_closed;  
         #if WORDS_BIGENDIAN  
         bEndianNative = Endian != endian_little;  
         #else  
         bEndianNative = Endian != endian_big;  
         #endif  
         ulStartPos = RIFF_HEADER_SIZE;  
         ListType = FileType;  
     }  
   
1391      /** @brief Load existing RIFF file.      /** @brief Load existing RIFF file.
1392       *       *
1393       * Loads an existing RIFF file with all its chunks.       * Loads an existing RIFF file with all its chunks.
# Line 1528  namespace RIFF { Line 1502  namespace RIFF {
1502                                                       NULL, OPEN_EXISTING,                                                       NULL, OPEN_EXISTING,
1503                                                       FILE_ATTRIBUTE_NORMAL, NULL                                                       FILE_ATTRIBUTE_NORMAL, NULL
1504                                                   );                                                   );
1505                          throw Exception("Could not (re)open file \"" + Filename + "\" in read mode");                          throw Exception("Could not (re)open file \"" + Filename + "\" in read+write mode");
1506                      }                      }
1507                      #else                      #else
1508                      if (hFileRead) fclose(hFileRead);                      if (hFileRead) fclose(hFileRead);
# Line 1562  namespace RIFF { Line 1536  namespace RIFF {
1536          return false;          return false;
1537      }      }
1538    
1539        /** @brief Set the byte order to be used when saving.
1540         *
1541         * Set the byte order to be used in the file. A value of
1542         * endian_little will create a RIFF file, endian_big a RIFX file
1543         * and endian_native will create a RIFF file on little-endian
1544         * machines and RIFX on big-endian machines.
1545         *
1546         * @param Endian - endianess to use when file is saved.
1547         */
1548        void File::SetByteOrder(endian_t Endian) {
1549            #if WORDS_BIGENDIAN
1550            bEndianNative = Endian != endian_little;
1551            #else
1552            bEndianNative = Endian != endian_big;
1553            #endif
1554        }
1555    
1556      /** @brief Save changes to same file.      /** @brief Save changes to same file.
1557       *       *
1558       * Make all changes of all chunks persistent by writing them to the       * Make all changes of all chunks persistent by writing them to the
# Line 1703  namespace RIFF { Line 1694  namespace RIFF {
1694          // forget all resized chunks          // forget all resized chunks
1695          ResizedChunks.clear();          ResizedChunks.clear();
1696    
1697          if (Filename.length() > 0) {          #if POSIX
1698              #if POSIX          if (hFileWrite) close(hFileWrite);
1699              close(hFileWrite);          #elif defined(WIN32)
1700              #elif defined(WIN32)          if (hFileWrite != INVALID_HANDLE_VALUE) CloseHandle(hFileWrite);
1701              CloseHandle(hFileWrite);          #else
1702              #else          if (hFileWrite) fclose(hFileWrite);
1703              fclose(hFileWrite);          #endif
1704              #endif          hFileWrite = hFileRead;
             hFileWrite = hFileRead;  
         }  
1705    
1706          // associate new file with this File object from now on          // associate new file with this File object from now on
1707          Filename = path;          Filename = path;
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