/[svn]/libgig/trunk/src/RIFF.cpp
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revision 1102 by persson, Sun Mar 18 07:13:06 2007 UTC revision 1184 by persson, Sun May 13 13:24:22 2007 UTC
# Line 29  Line 29 
29    
30  namespace RIFF {  namespace RIFF {
31    
32    // *************** Internal functions **************
33    // *
34    
35        /// Returns a human readable path of the given chunk.
36        String __resolveChunkPath(Chunk* pCk) {
37            String sPath;
38            for (Chunk* pChunk = pCk; pChunk; pChunk = pChunk->GetParent()) {
39                if (pChunk->GetChunkID() == CHUNK_ID_LIST) {
40                    List* pList = (List*) pChunk;
41                    sPath = "->'" + pList->GetListTypeString() + "'" + sPath;
42                } else {
43                    sPath = "->'" + pChunk->GetChunkIDString() + "'" + sPath;
44                }
45            }
46            return sPath;
47        }
48    
49    
50    
51  // *************** Chunk **************  // *************** Chunk **************
52  // *  // *
53    
# Line 775  namespace RIFF { Line 794  namespace RIFF {
794       * @see File::Save()       * @see File::Save()
795       */       */
796      void Chunk::Resize(int iNewSize) {      void Chunk::Resize(int iNewSize) {
797          if (iNewSize <= 0) throw Exception("Chunk size must be at least one byte");          if (iNewSize <= 0)
798                throw Exception("There is at least one empty chunk (zero size): " + __resolveChunkPath(this));
799          if (NewChunkSize == iNewSize) return;          if (NewChunkSize == iNewSize) return;
800          NewChunkSize = iNewSize;          NewChunkSize = iNewSize;
801          pFile->LogAsResized(this);          pFile->LogAsResized(this);
# Line 1507  namespace RIFF { Line 1527  namespace RIFF {
1527          return false;          return false;
1528      }      }
1529    
1530        /** @brief Set the byte order to be used when saving.
1531         *
1532         * Set the byte order to be used in the file. A value of
1533         * endian_little will create a RIFF file, endian_big a RIFX file
1534         * and endian_native will create a RIFF file on little-endian
1535         * machines and RIFX on big-endian machines.
1536         *
1537         * @param Endian - endianess to use when file is saved.
1538         */
1539        void File::SetByteOrder(endian_t Endian) {
1540            #if WORDS_BIGENDIAN
1541            bEndianNative = Endian != endian_little;
1542            #else
1543            bEndianNative = Endian != endian_big;
1544            #endif
1545        }
1546    
1547      /** @brief Save changes to same file.      /** @brief Save changes to same file.
1548       *       *
1549       * 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 1535  namespace RIFF { Line 1572  namespace RIFF {
1572          unsigned long ulPositiveSizeDiff = 0;          unsigned long ulPositiveSizeDiff = 0;
1573          for (ChunkList::iterator iter = ResizedChunks.begin(), end = ResizedChunks.end(); iter != end; ++iter) {          for (ChunkList::iterator iter = ResizedChunks.begin(), end = ResizedChunks.end(); iter != end; ++iter) {
1574              if ((*iter)->GetNewSize() == 0) {              if ((*iter)->GetNewSize() == 0) {
1575                  // just to make the exception message a bit more verbose: resolve the chunk's path                  throw Exception("There is at least one empty chunk (zero size): " + __resolveChunkPath(*iter));
                 String sChunkPath;  
                 for (Chunk* pChunk = *iter; pChunk; pChunk = pChunk->GetParent()) {  
                     if (pChunk->GetChunkID() == CHUNK_ID_LIST) {  
                         List* pList = (List*) pChunk;  
                         sChunkPath = "->'" + pList->GetListTypeString() + "'" + sChunkPath;  
                     } else {  
                         sChunkPath = "->'" + pChunk->GetChunkIDString() + "'" + sChunkPath;  
                     }  
                 }  
                 throw Exception("There is at least one empty chunk (zero size): " + sChunkPath);  
1576              }              }
1577              if ((*iter)->GetNewSize() + 1L > (*iter)->GetSize()) {              if ((*iter)->GetNewSize() + 1L > (*iter)->GetSize()) {
1578                  unsigned long ulDiff = (*iter)->GetNewSize() - (*iter)->GetSize() + 1L; // +1 in case we have to add a pad byte                  unsigned long ulDiff = (*iter)->GetNewSize() - (*iter)->GetSize() + 1L; // +1 in case we have to add a pad byte
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