/[svn]/libgig/trunk/src/RIFF.cpp

Diff of /libgig/trunk/src/RIFF.cpp

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-revision 11 by schoenebeck,
Sun Nov 16 17:47:00 2003 UTC
+revision 802 by schoenebeck,
Thu Nov 10 19:53:34 2005 UTC
 Line 2
   *                                                                         *
   *   libgig - C++ cross-platform Gigasampler format file loader library    *
   *                                                                         *
-  *   Copyright (C) 2003 by Christian Schoenebeck                           *
+  *   Copyright (C) 2003-2005 by Christian Schoenebeck                      *
-  *                         <cuse@users.sourceforge.net>                    *
+  *                              <cuse@users.sourceforge.net>               *
   *                                                                         *
   *   This library is free software; you can redistribute it and/or modify  *
   *   it under the terms of the GNU General Public License as published by  *
 Line 20
   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
   *   MA  02111-1307  USA                                                   *
   ***************************************************************************/
- #if 1
+ #include <string.h>
  #include "RIFF.h"
+ #include "helper.h"
  namespace RIFF {
  // *************** Chunk **************
  // *
-     Chunk::Chunk() {
+     Chunk::Chunk(File* pFile) {
          #if DEBUG
-         std::cout << "Chunk::Chunk()" << std::endl;
+         std::cout << "Chunk::Chunk(File* pFile)" << std::endl;
          #endif // DEBUG
          ulPos      = 0;
          pParent    = NULL;
          pChunkData = NULL;
+         ulChunkDataSize = 0;
+         ChunkID    = CHUNK_ID_RIFF;
+         this->pFile = pFile;
      }
-     #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
          #if DEBUG
-         std::cout << "Chunk::Chunk(FILE,ulong,bool,List*),StartPos=" << StartPos << std::endl;
+         std::cout << "Chunk::Chunk(File*,ulong,bool,List*),StartPos=" << StartPos << std::endl;
          #endif // DEBUG
-         Chunk::hFile  = hFile;
+         this->pFile   = pFile;
          ulStartPos    = StartPos + CHUNK_HEADER_SIZE;
-         bEndianNative = EndianNative;
          pParent       = Parent;
          ulPos         = 0;
          pChunkData    = NULL;
+         ulChunkDataSize = 0;
          ReadHeader(StartPos);
      }
+     Chunk::Chunk(File* pFile, List* pParent, uint32_t uiChunkID, uint uiBodySize) {
+         this->pFile      = pFile;
+         ulStartPos       = 0; // arbitrary usually, since it will be updated when we write the chunk
+         this->pParent    = pParent;
+         ulPos            = 0;
+         pChunkData       = NULL;
+         ulChunkDataSize  = 0;
+         ChunkID          = uiChunkID;
+         CurrentChunkSize = 0;
+         NewChunkSize     = uiBodySize;
+     }
      Chunk::~Chunk() {
          if (pChunkData) delete[] pChunkData;
      }
-Line 63 
 namespace RIFF {
+Line 78 
 namespace RIFF {
          std::cout << "Chunk::Readheader(" << fPos << ") ";
          #endif // DEBUG
          #if POSIX
-         if (lseek(hFile, fPos, SEEK_SET) != -1) {
+         if (lseek(pFile->hFileRead, fPos, SEEK_SET) != -1) {
-             read(hFile, &ChunkID, 4);
+             read(pFile->hFileRead, &ChunkID, 4);
-             read(hFile, &ChunkSize, 4);
+             read(pFile->hFileRead, &CurrentChunkSize, 4);
          #else
-         if (!fseek(hFile, fPos, SEEK_SET)) {
+         if (!fseek(pFile->hFileRead, fPos, SEEK_SET)) {
-             fread(&ChunkID, 4, 1, hFile);
+             fread(&ChunkID, 4, 1, pFile->hFileRead);
-             fread(&ChunkSize, 4, 1, hFile);
+             fread(&CurrentChunkSize, 4, 1, pFile->hFileRead);
          #endif // POSIX
              #if WORDS_BIGENDIAN
              if (ChunkID == CHUNK_ID_RIFF) {
-Line 77 
 namespace RIFF {
+Line 92 
 namespace RIFF {
              }
              #else // little endian
              if (ChunkID == CHUNK_ID_RIFX) {
-                 bEndianNative = false;
+                 pFile->bEndianNative = false;
                  ChunkID = CHUNK_ID_RIFF;
              }
              #endif // WORDS_BIGENDIAN
-             if (!bEndianNative) {
+             if (!pFile->bEndianNative) {
                  //swapBytes_32(&ChunkID);
-                 swapBytes_32(&ChunkSize);
+                 swapBytes_32(&CurrentChunkSize);
              }
              #if DEBUG
              std::cout << "ckID=" << convertToString(ChunkID) << " ";
              std::cout << "ckSize=" << ChunkSize << " ";
              std::cout << "bEndianNative=" << bEndianNative << std::endl;
              #endif // DEBUG
+             NewChunkSize = CurrentChunkSize;
          }
      }
+     void Chunk::WriteHeader(unsigned long fPos) {
+         uint32_t uiNewChunkID = ChunkID;
+         if (ChunkID == CHUNK_ID_RIFF) {
+             #if WORDS_BIGENDIAN
+             if (pFile->bEndianNative) uiNewChunkID = CHUNK_ID_RIFX;
+             #else // little endian
+             if (!pFile->bEndianNative) uiNewChunkID = CHUNK_ID_RIFX;
+             #endif // WORDS_BIGENDIAN
+         }
+         uint32_t uiNewChunkSize = NewChunkSize;
+         if (!pFile->bEndianNative) {
+             swapBytes_32(&uiNewChunkSize);
+         }
+         #if POSIX
+         if (lseek(pFile->hFileWrite, fPos, SEEK_SET) != -1) {
+             write(pFile->hFileWrite, &uiNewChunkID, 4);
+             write(pFile->hFileWrite, &uiNewChunkSize, 4);
+         }
+         #else
+         if (!fseek(pFile->hFileWrite, fPos, SEEK_SET)) {
+             fwrite(&uiNewChunkID, 4, 1, pFile->hFileWrite);
+             fwrite(&uiNewChunkSize, 4, 1, pFile->hFileWrite);
+         }
+         #endif // POSIX
+     }
      /**
       *  Returns the String representation of the chunk's ID (e.g. "RIFF",
       *  "LIST").
-Line 105 
 namespace RIFF {
+Line 149 
 namespace RIFF {
       *  Sets the position within the chunk body, thus within the data portion
       *  of the chunk (in bytes).
       *
+      *  <b>Caution:</b> the position will be reset to zero whenever
+      *  File::Save() was called.
+      *
       *  @param Where  - position offset (in bytes)
       *  @param Whence - optional: defines to what <i>\a Where</i> relates to,
       *                  if omitted \a Where relates to beginning of the chunk
-Line 119 
 namespace RIFF {
+Line 166 
 namespace RIFF {
                  ulPos += Where;
                  break;
              case stream_end:
-                 ulPos = ChunkSize - 1 - Where;
+                 ulPos = CurrentChunkSize - 1 - Where;
                  break;
              case stream_backward:
                  ulPos -= Where;
-Line 128 
 namespace RIFF {
+Line 175 
 namespace RIFF {
                  ulPos = Where;
                  break;
          }
-         if (ulPos > ChunkSize) ulPos = ChunkSize;
+         if (ulPos > CurrentChunkSize) ulPos = CurrentChunkSize;
          return ulPos;
      }
-Line 144 
 namespace RIFF {
+Line 191 
 namespace RIFF {
       */
      unsigned long Chunk::RemainingBytes() {
         #if DEBUG
-        std::cout << "Chunk::Remainingbytes()=" << ChunkSize - ulPos << std::endl;
+        std::cout << "Chunk::Remainingbytes()=" << CurrentChunkSize - ulPos << std::endl;
         #endif // DEBUG
-         return ChunkSize - ulPos;
+         return CurrentChunkSize - ulPos;
      }
      /**
-Line 165 
 namespace RIFF {
+Line 212 
 namespace RIFF {
        std::cout << "Chunk::GetState()" << std::endl;
        #endif // DEBUG
          #if POSIX
-         if (hFile == 0)        return stream_closed;
+         if (pFile->hFileRead == 0)    return stream_closed;
          #else
-         if (hFile == NULL)     return stream_closed;
+         if (pFile->hFileRead == NULL) return stream_closed;
          #endif // POSIX
-         if (ulPos < ChunkSize) return stream_ready;
+         if (ulPos < CurrentChunkSize) return stream_ready;
-         else                   return stream_end_reached;
+         else                          return stream_end_reached;
      }
      /**
-Line 192 
 namespace RIFF {
+Line 239 
 namespace RIFF {
         #if DEBUG
         std::cout << "Chunk::Read(void*,ulong,ulong)" << std::endl;
         #endif // DEBUG
-         if (ChunkSize - ulPos <= 0) return 0;
+         if (ulPos >= CurrentChunkSize) return 0;
-         if (ulPos + WordCount * WordSize >= ChunkSize) WordCount = (ChunkSize - ulPos) / WordSize;
+         if (ulPos + WordCount * WordSize >= CurrentChunkSize) WordCount = (CurrentChunkSize - ulPos) / WordSize;
          #if POSIX
-         if (lseek(hFile, ulStartPos + ulPos, SEEK_SET) < 0) return 0;
+         if (lseek(pFile->hFileRead, ulStartPos + ulPos, SEEK_SET) < 0) return 0;
-         unsigned long readWords = read(hFile, pData, WordCount * WordSize);
+         unsigned long readWords = read(pFile->hFileRead, pData, WordCount * WordSize);
          if (readWords < 1) return 0;
          readWords /= WordSize;
          #else // standard C functions
-         if (fseek(hFile, ulStartPos + ulPos, SEEK_SET)) return 0;
+         if (fseek(pFile->hFileRead, ulStartPos + ulPos, SEEK_SET)) return 0;
-         unsigned long readWords = fread(pData, WordSize, WordCount, hFile);
+         unsigned long readWords = fread(pData, WordSize, WordCount, pFile->hFileRead);
          #endif // POSIX
-         if (!bEndianNative && WordSize != 1) {
+         if (!pFile->bEndianNative && WordSize != 1) {
              switch (WordSize) {
                  case 2:
                      for (unsigned long iWord = 0; iWord < readWords; iWord++)
-Line 223 
 namespace RIFF {
+Line 270 
 namespace RIFF {
          return readWords;
      }
+     /**
+      *  Writes \a WordCount number of data words with given \a WordSize from
+      *  the buffer pointed by \a pData. Be sure to provide the correct
+      *  \a WordSize, as this will be important and taken into account for
+      *  eventual endian correction (swapping of bytes due to different
+      *  native byte order of a system). The position within the chunk will
+      *  automatically be incremented.
+      *
+      *  @param pData      source buffer (containing the data)
+      *  @param WordCount  number of data words to write
+      *  @param WordSize   size of each data word to write
+      *  @returns          number of successfully written data words
+      *  @throws RIFF::Exception  if write operation would exceed current
+      *                           chunk size or any IO error occured
+      *  @see Resize()
+      */
+     unsigned long Chunk::Write(void* pData, unsigned long WordCount, unsigned long WordSize) {
+         if (pFile->Mode != stream_mode_read_write)
+             throw Exception("Cannot write data to chunk, file has to be opened in read+write mode first");
+         if (ulPos >= CurrentChunkSize || ulPos + WordCount * WordSize > CurrentChunkSize)
+             throw Exception("End of chunk reached while trying to write data");
+         if (!pFile->bEndianNative && WordSize != 1) {
+             switch (WordSize) {
+                 case 2:
+                     for (unsigned long iWord = 0; iWord < WordCount; iWord++)
+                         swapBytes_16((uint16_t*) pData + iWord);
+                     break;
+                 case 4:
+                     for (unsigned long iWord = 0; iWord < WordCount; iWord++)
+                         swapBytes_32((uint32_t*) pData + iWord);
+                     break;
+                 default:
+                     for (unsigned long iWord = 0; iWord < WordCount; iWord++)
+                         swapBytes((uint8_t*) pData + iWord * WordSize, WordSize);
+                     break;
+             }
+         }
+         #if POSIX
+         if (lseek(pFile->hFileWrite, ulStartPos + ulPos, SEEK_SET) < 0) {
+             throw Exception("Could not seek to position " + ToString(ulPos) +
+                             " in chunk (" + ToString(ulStartPos + ulPos) + " in file)");
+         }
+         unsigned long writtenWords = write(pFile->hFileWrite, pData, WordCount * WordSize);
+         if (writtenWords < 1) throw Exception("POSIX IO Error while trying to write chunk data");
+         writtenWords /= WordSize;
+         #else // standard C functions
+         if (fseek(pFile->hFileWrite, ulStartPos + ulPos, SEEK_SET)) {
+             throw Exception("Could not seek to position " + ToString(ulPos) +
+                             " in chunk (" + ToString(ulStartPos + ulPos) + " in file)");
+         }
+         unsigned long writtenWords = fwrite(pData, WordSize, WordCount, pFile->hFileWrite);
+         #endif // POSIX
+         SetPos(writtenWords * WordSize, stream_curpos);
+         return writtenWords;
+     }
      /** Just an internal wrapper for the main <i>Read()</i> method with additional Exception throwing on errors. */
      unsigned long Chunk::ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize) {
          unsigned long readWords = Read(pData, WordCount, WordSize);
-Line 249 
 namespace RIFF {
+Line 352 
 namespace RIFF {
      }
      /**
+      * Writes \a WordCount number of 8 Bit signed integer words from the
+      * buffer pointed by \a pData to the chunk's body, directly to the
+      * actual "physical" file. The position within the chunk will
+      * automatically be incremented. Note: you cannot write beyond the
+      * boundaries of the chunk, to append data to the chunk call Resize()
+      * before.
+      *
+      * @param pData             source buffer (containing the data)
+      * @param WordCount         number of 8 Bit signed integers to write
+      * @returns                 number of written integers
+      * @throws RIFF::Exception  if an IO error occured
+      * @see Resize()
+      */
+     unsigned long Chunk::WriteInt8(int8_t* pData, unsigned long WordCount) {
+         return Write(pData, WordCount, 1);
+     }
+     /**
       * Reads \a WordCount number of 8 Bit unsigned integer words and copies
       * it into the buffer pointed by \a pData. The buffer has to be
       * allocated. The position within the chunk will automatically be
-Line 268 
 namespace RIFF {
+Line 389 
 namespace RIFF {
      }
      /**
+      * Writes \a WordCount number of 8 Bit unsigned integer words from the
+      * buffer pointed by \a pData to the chunk's body, directly to the
+      * actual "physical" file. The position within the chunk will
+      * automatically be incremented. Note: you cannot write beyond the
+      * boundaries of the chunk, to append data to the chunk call Resize()
+      * before.
+      *
+      * @param pData             source buffer (containing the data)
+      * @param WordCount         number of 8 Bit unsigned integers to write
+      * @returns                 number of written integers
+      * @throws RIFF::Exception  if an IO error occured
+      * @see Resize()
+      */
+     unsigned long Chunk::WriteUint8(uint8_t* pData, unsigned long WordCount) {
+         return Write(pData, WordCount, 1);
+     }
+     /**
       * Reads \a WordCount number of 16 Bit signed integer words and copies
       * it into the buffer pointed by \a pData. The buffer has to be
       * allocated. Endian correction will automatically be done if needed.
-Line 287 
 namespace RIFF {
+Line 426 
 namespace RIFF {
      }
      /**
+      * Writes \a WordCount number of 16 Bit signed integer words from the
+      * buffer pointed by \a pData to the chunk's body, directly to the
+      * actual "physical" file. The position within the chunk will
+      * automatically be incremented. Note: you cannot write beyond the
+      * boundaries of the chunk, to append data to the chunk call Resize()
+      * before.
+      *
+      * @param pData             source buffer (containing the data)
+      * @param WordCount         number of 16 Bit signed integers to write
+      * @returns                 number of written integers
+      * @throws RIFF::Exception  if an IO error occured
+      * @see Resize()
+      */
+     unsigned long Chunk::WriteInt16(int16_t* pData, unsigned long WordCount) {
+         return Write(pData, WordCount, 2);
+     }
+     /**
       * Reads \a WordCount number of 16 Bit unsigned integer words and copies
       * it into the buffer pointed by \a pData. The buffer has to be
       * allocated. Endian correction will automatically be done if needed.
-Line 306 
 namespace RIFF {
+Line 463 
 namespace RIFF {
      }
      /**
+      * Writes \a WordCount number of 16 Bit unsigned integer words from the
+      * buffer pointed by \a pData to the chunk's body, directly to the
+      * actual "physical" file. The position within the chunk will
+      * automatically be incremented. Note: you cannot write beyond the
+      * boundaries of the chunk, to append data to the chunk call Resize()
+      * before.
+      *
+      * @param pData             source buffer (containing the data)
+      * @param WordCount         number of 16 Bit unsigned integers to write
+      * @returns                 number of written integers
+      * @throws RIFF::Exception  if an IO error occured
+      * @see Resize()
+      */
+     unsigned long Chunk::WriteUint16(uint16_t* pData, unsigned long WordCount) {
+         return Write(pData, WordCount, 2);
+     }
+     /**
       * Reads \a WordCount number of 32 Bit signed integer words and copies
       * it into the buffer pointed by \a pData. The buffer has to be
       * allocated. Endian correction will automatically be done if needed.
-Line 325 
 namespace RIFF {
+Line 500 
 namespace RIFF {
      }
      /**
+      * Writes \a WordCount number of 32 Bit signed integer words from the
+      * buffer pointed by \a pData to the chunk's body, directly to the
+      * actual "physical" file. The position within the chunk will
+      * automatically be incremented. Note: you cannot write beyond the
+      * boundaries of the chunk, to append data to the chunk call Resize()
+      * before.
+      *
+      * @param pData             source buffer (containing the data)
+      * @param WordCount         number of 32 Bit signed integers to write
+      * @returns                 number of written integers
+      * @throws RIFF::Exception  if an IO error occured
+      * @see Resize()
+      */
+     unsigned long Chunk::WriteInt32(int32_t* pData, unsigned long WordCount) {
+         return Write(pData, WordCount, 4);
+     }
+     /**
       * Reads \a WordCount number of 32 Bit unsigned integer words and copies
       * it into the buffer pointed by \a pData. The buffer has to be
       * allocated. Endian correction will automatically be done if needed.
-Line 344 
 namespace RIFF {
+Line 537 
 namespace RIFF {
      }
      /**
+      * Writes \a WordCount number of 32 Bit unsigned integer words from the
+      * buffer pointed by \a pData to the chunk's body, directly to the
+      * actual "physical" file. The position within the chunk will
+      * automatically be incremented. Note: you cannot write beyond the
+      * boundaries of the chunk, to append data to the chunk call Resize()
+      * before.
+      *
+      * @param pData             source buffer (containing the data)
+      * @param WordCount         number of 32 Bit unsigned integers to write
+      * @returns                 number of written integers
+      * @throws RIFF::Exception  if an IO error occured
+      * @see Resize()
+      */
+     unsigned long Chunk::WriteUint32(uint32_t* pData, unsigned long WordCount) {
+         return Write(pData, WordCount, 4);
+     }
+     /**
       * Reads one 8 Bit signed integer word and increments the position within
       * the chunk.
       *
-Line 443 
 namespace RIFF {
+Line 654 
 namespace RIFF {
          return word;
      }
+     /** @brief Load chunk body into RAM.
+      *
+      * Loads the whole chunk body into memory. You can modify the data in
+      * RAM and save the data by calling File::Save() afterwards.
+      *
+      * <b>Caution:</b> the buffer pointer will be invalidated once
+      * File::Save() was called. You have to call LoadChunkData() again to
+      * get a new, valid pointer whenever File::Save() was called.
+      *
+      * You can call LoadChunkData() again if you previously scheduled to
+      * enlarge this chunk with a Resize() call. In that case the buffer will
+      * be enlarged to the new, scheduled chunk size and you can already
+      * place the new chunk data to the buffer and finally call File::Save()
+      * to enlarge the chunk physically and write the new data in one rush.
+      * This approach is definitely recommended if you have to enlarge and
+      * write new data to a lot of chunks.
+      *
+      * @returns a pointer to the data in RAM on success, NULL otherwise
+      * @throws Exception if data buffer could not be enlarged
+      * @see ReleaseChunkData()
+      */
      void* Chunk::LoadChunkData() {
-         if (!pChunkData) {
+         if (!pChunkData && pFile->Filename != "") {
              #if POSIX
-             if (lseek(hFile, ulStartPos, SEEK_SET) == -1) return NULL;
+             if (lseek(pFile->hFileRead, ulStartPos, SEEK_SET) == -1) return NULL;
-             pChunkData = new uint8_t[GetSize()];
-             if (!pChunkData) return NULL;
-             unsigned long readWords = read(hFile, pChunkData, GetSize());
              #else
-             if (fseek(hFile, ulStartPos, SEEK_SET)) return NULL;
+             if (fseek(pFile->hFileRead, ulStartPos, SEEK_SET)) return NULL;
-             pChunkData = new uint8_t[GetSize()];
+             #endif // POSIX
+             unsigned long ulBufferSize = (CurrentChunkSize > NewChunkSize) ? CurrentChunkSize : NewChunkSize;
+             pChunkData = new uint8_t[ulBufferSize];
              if (!pChunkData) return NULL;
-             unsigned long readWords = fread(pChunkData, 1, GetSize(), hFile);
+             memset(pChunkData, 0, ulBufferSize);
+             #if POSIX
+             unsigned long readWords = read(pFile->hFileRead, pChunkData, GetSize());
+             #else
+             unsigned long readWords = fread(pChunkData, 1, GetSize(), pFile->hFileRead);
              #endif // POSIX
              if (readWords != GetSize()) {
                  delete[] pChunkData;
                  return (pChunkData = NULL);
              }
+             ulChunkDataSize = ulBufferSize;
+         } else if (NewChunkSize > ulChunkDataSize) {
+             uint8_t* pNewBuffer = new uint8_t[NewChunkSize];
+             if (!pNewBuffer) throw Exception("Could not enlarge chunk data buffer to " + ToString(NewChunkSize) + " bytes");
+             memset(pNewBuffer, 0 , NewChunkSize);
+             memcpy(pNewBuffer, pChunkData, ulChunkDataSize);
+             delete[] pChunkData;
+             pChunkData      = pNewBuffer;
+             ulChunkDataSize = NewChunkSize;
          }
          return pChunkData;
      }
+     /** @brief Free loaded chunk body from RAM.
+      *
+      * Frees loaded chunk body data from memory (RAM). You should call
+      * File::Save() before calling this method if you modified the data to
+      * make the changes persistent.
+      */
      void Chunk::ReleaseChunkData() {
          if (pChunkData) {
              delete[] pChunkData;
-Line 471 
 namespace RIFF {
+Line 721 
 namespace RIFF {
          }
      }
+     /** @brief Resize chunk.
+      *
+      * Resizes this chunk's body, that is the actual size of data possible
+      * to be written to this chunk. This call will return immediately and
+      * just schedule the resize operation. You should call File::Save() to
+      * actually perform the resize operation(s) "physically" to the file.
+      * As this can take a while on large files, it is recommended to call
+      * Resize() first on all chunks which have to be resized and finally to
+      * call File::Save() to perform all those resize operations in one rush.
+      *
+      * <b>Caution:</b> You cannot directly write to enlarged chunks before
+      * calling File::Save() as this might exceed the current chunk's body
+      * boundary!
+      *
+      * @param iNewSize - new chunk body size in bytes (must be greater than zero)
+      * @throws RIFF::Exception  if \a iNewSize is less than 1
+      * @see File::Save()
+      */
+     void Chunk::Resize(int iNewSize) {
+         if (iNewSize <= 0) throw Exception("Chunk size must be at least one byte");
+         if (NewChunkSize == iNewSize) return;
+         NewChunkSize = iNewSize;
+         pFile->LogAsResized(this);
+     }
+     /** @brief Write chunk persistently e.g. to disk.
+      *
+      * Stores the chunk persistently to its actual "physical" file.
+      *
+      * @param ulWritePos - position within the "physical" file where this
+      *                     chunk should be written to
+      * @param ulCurrentDataOffset - offset of current (old) data within
+      *                              the file
+      * @returns new write position in the "physical" file, that is
+      *          \a ulWritePos incremented by this chunk's new size
+      *          (including its header size of course)
+      */
+     unsigned long Chunk::WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset) {
+         const unsigned long ulOriginalPos = ulWritePos;
+         ulWritePos += CHUNK_HEADER_SIZE;
+         if (pFile->Mode != stream_mode_read_write)
+             throw Exception("Cannot write list chunk, file has to be opened in read+write mode");
+         // if the whole chunk body was loaded into RAM
+         if (pChunkData) {
+             // make sure chunk data buffer in RAM is at least as large as the new chunk size
+             LoadChunkData();
+             // write chunk data from RAM persistently to the file
+             #if POSIX
+             lseek(pFile->hFileWrite, ulWritePos, SEEK_SET);
+             if (write(pFile->hFileWrite, pChunkData, NewChunkSize) != NewChunkSize) {
+                 throw Exception("Writing Chunk data (from RAM) failed");
+             }
+             #else
+             fseek(pFile->hFileWrite, ulWritePos, SEEK_SET);
+             if (fwrite(pChunkData, 1, NewChunkSize, pFile->hFileWrite) != NewChunkSize) {
+                 throw Exception("Writing Chunk data (from RAM) failed");
+             }
+             #endif // POSIX
+         } else {
+             // move chunk data from the end of the file to the appropriate position
+             int8_t* pCopyBuffer = new int8_t[4096];
+             unsigned long ulToMove = (NewChunkSize < CurrentChunkSize) ? NewChunkSize : CurrentChunkSize;
+             int iBytesMoved = 1;
+             for (unsigned long ulOffset = 0; iBytesMoved > 0; ulOffset += iBytesMoved, ulToMove -= iBytesMoved) {
+                 iBytesMoved = (ulToMove < 4096) ? ulToMove : 4096;
+                 #if POSIX
+                 lseek(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, SEEK_SET);
+                 iBytesMoved = read(pFile->hFileRead, pCopyBuffer, iBytesMoved);
+                 lseek(pFile->hFileWrite, ulWritePos + ulOffset, SEEK_SET);
+                 iBytesMoved = write(pFile->hFileWrite, pCopyBuffer, iBytesMoved);
+                 #else
+                 fseek(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, SEEK_SET);
+                 iBytesMoved = fread(pCopyBuffer, 1, iBytesMoved, pFile->hFileRead);
+                 fseek(pFile->hFileWrite, ulWritePos + ulOffset, SEEK_SET);
+                 iBytesMoved = fwrite(pCopyBuffer, 1, iBytesMoved, pFile->hFileWrite);
+                 #endif
+             }
+             delete[] pCopyBuffer;
+             if (iBytesMoved < 0) throw Exception("Writing Chunk data (from file) failed");
+         }
+         // update this chunk's header
+         CurrentChunkSize = NewChunkSize;
+         WriteHeader(ulOriginalPos);
+         // update chunk's position pointers
+         ulStartPos = ulOriginalPos + CHUNK_HEADER_SIZE;
+         ulPos      = 0;
+         // add pad byte if needed
+         if ((ulStartPos + NewChunkSize) % 2 != 0) {
+             const char cPadByte = 0;
+             #if POSIX
+             lseek(pFile->hFileWrite, ulStartPos + NewChunkSize, SEEK_SET);
+             write(pFile->hFileWrite, &cPadByte, 1);
+             #else
+             fseek(pFile->hFileWrite, ulStartPos + NewChunkSize, SEEK_SET);
+             fwrite(&cPadByte, 1, 1, pFile->hFileWrite);
+             #endif
+             return ulStartPos + NewChunkSize + 1;
+         }
+         return ulStartPos + NewChunkSize;
+     }
+     void Chunk::__resetPos() {
+         ulPos = 0;
+     }
  // *************** List ***************
  // *
-     List::List() : Chunk() {
+     List::List(File* pFile) : Chunk(pFile) {
        #if DEBUG
-       std::cout << "List::List()" << std::endl;
+       std::cout << "List::List(File* pFile)" << std::endl;
        #endif // DEBUG
          pSubChunks    = NULL;
          pSubChunksMap = NULL;
      }
-     #if POSIX
+     List::List(File* pFile, unsigned long StartPos, List* Parent)
-     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) {
          #if DEBUG
-         std::cout << "List::List(FILE*,ulong,bool,List*)" << std::endl;
+         std::cout << "List::List(File*,ulong,bool,List*)" << std::endl;
          #endif // DEBUG
          pSubChunks    = NULL;
          pSubChunksMap = NULL;
-Line 499 
 namespace RIFF {
+Line 856 
 namespace RIFF {
          ulStartPos    = StartPos + LIST_HEADER_SIZE;
      }
+     List::List(File* pFile, List* pParent, uint32_t uiListID)
+       : Chunk(pFile, pParent, CHUNK_ID_LIST, 0) {
+         pSubChunks    = NULL;
+         pSubChunksMap = NULL;
+         ListType      = uiListID;
+     }
      List::~List() {
        #if DEBUG
        std::cout << "List::~List()" << std::endl;
-Line 642 
 namespace RIFF {
+Line 1006 
 namespace RIFF {
      }
      /**
-      *  Returns number subchunks within the list.
+      *  Returns number of subchunks within the list.
       */
      unsigned int List::CountSubChunks() {
          if (!pSubChunks) LoadSubChunks();
-Line 693 
 namespace RIFF {
+Line 1057 
 namespace RIFF {
          return result;
      }
+     /** @brief Creates a new sub chunk.
+      *
+      * Creates and adds a new sub chunk to this list chunk. Note that the
+      * chunk's body size given by \a uiBodySize must be greater than zero.
+      * You have to call File::Save() to make this change persistent to the
+      * actual file and <b>before</b> performing any data write operations
+      * on the new chunk!
+      *
+      * @param uiChunkID  - chunk ID of the new chunk
+      * @param uiBodySize - size of the new chunk's body, that is its actual
+      *                     data size (without header)
+      * @throws RIFF::Exception if \a uiBodySize equals zero
+      */
+     Chunk* List::AddSubChunk(uint32_t uiChunkID, uint uiBodySize) {
+         if (uiBodySize == 0) throw Exception("Chunk body size must be at least 1 byte");
+         if (!pSubChunks) LoadSubChunks();
+         Chunk* pNewChunk = new Chunk(pFile, this, uiChunkID, 0);
+         pSubChunks->push_back(pNewChunk);
+         (*pSubChunksMap)[uiChunkID] = pNewChunk;
+         pNewChunk->Resize(uiBodySize);
+         return pNewChunk;
+     }
+     /** @brief Creates a new list sub chunk.
+      *
+      * Creates and adds a new list sub chunk to this list chunk. Note that
+      * you have to add sub chunks / sub list chunks to the new created chunk
+      * <b>before</b> trying to make this change persisten to the actual
+      * file with File::Save()!
+      *
+      * @param uiListType - list ID of the new list chunk
+      */
+     List* List::AddSubList(uint32_t uiListType) {
+         if (!pSubChunks) LoadSubChunks();
+         List* pNewListChunk = new List(pFile, this, uiListType);
+         pSubChunks->push_back(pNewListChunk);
+         (*pSubChunksMap)[CHUNK_ID_LIST] = pNewListChunk;
+         return pNewListChunk;
+     }
+     /** @brief Removes a sub chunk.
+      *
+      * Removes the sub chunk given by \a pSubChunk from this list and frees
+      * it completely from RAM. The given chunk can either be a normal sub
+      * chunk or a list sub chunk. You should call File::Save() to make this
+      * change persistent at any time.
+      *
+      * @param pSubChunk - sub chunk or sub list chunk to be removed
+      */
+     void List::DeleteSubChunk(Chunk* pSubChunk) {
+         if (!pSubChunks) LoadSubChunks();
+         pSubChunks->remove(pSubChunk);
+         if ((*pSubChunksMap)[pSubChunk->GetChunkID()] == pSubChunk) {
+             pSubChunksMap->erase(pSubChunk->GetChunkID());
+             // try to find another chunk of the same chunk ID
+             ChunkList::iterator iter = pSubChunks->begin();
+             ChunkList::iterator end  = pSubChunks->end();
+             for (; iter != end; ++iter) {
+                 if ((*iter)->GetChunkID() == pSubChunk->GetChunkID()) {
+                     (*pSubChunksMap)[pSubChunk->GetChunkID()] = *iter;
+                     break; // we're done, stop search
+                 }
+             }
+         }
+         delete pSubChunk;
+     }
      void List::ReadHeader(unsigned long fPos) {
        #if DEBUG
        std::cout << "List::Readheader(ulong) ";
        #endif // DEBUG
          Chunk::ReadHeader(fPos);
-         ChunkSize -= 4;
+         NewChunkSize = CurrentChunkSize -= 4;
          #if POSIX
-         lseek(hFile, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
+         lseek(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
-         read(hFile, &ListType, 4);
+         read(pFile->hFileRead, &ListType, 4);
          #else
-         fseek(hFile, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
+         fseek(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
-         fread(&ListType, 4, 1, hFile);
+         fread(&ListType, 4, 1, pFile->hFileRead);
          #endif // POSIX
        #if DEBUG
        std::cout << "listType=" << convertToString(ListType) << std::endl;
        #endif // DEBUG
-         if (!bEndianNative) {
+         if (!pFile->bEndianNative) {
              //swapBytes_32(&ListType);
          }
      }
+     void List::WriteHeader(unsigned long fPos) {
+         // the four list type bytes officially belong the chunk's body in the RIFF format
+         NewChunkSize += 4;
+         Chunk::WriteHeader(fPos);
+         NewChunkSize -= 4; // just revert the +4 incrementation
+         #if POSIX
+         lseek(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
+         write(pFile->hFileWrite, &ListType, 4);
+         #else
+         fseek(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
+         fwrite(&ListType, 4, 1, pFile->hFileWrite);
+         #endif // POSIX
+     }
      void List::LoadSubChunks() {
         #if DEBUG
         std::cout << "List::LoadSubChunks()";
-Line 721 
 namespace RIFF {
+Line 1166 
 namespace RIFF {
          if (!pSubChunks) {
              pSubChunks    = new ChunkList();
              pSubChunksMap = new ChunkMap();
+             if (!pFile->hFileRead) return;
+             unsigned long uiOriginalPos = GetPos();
+             SetPos(0); // jump to beginning of list chunk body
              while (RemainingBytes() >= CHUNK_HEADER_SIZE) {
                  Chunk* ck;
                  uint32_t ckid;
-Line 729 
 namespace RIFF {
+Line 1177 
 namespace RIFF {
         std::cout << " ckid=" << convertToString(ckid) << std::endl;
         #endif // DEBUG
                  if (ckid == CHUNK_ID_LIST) {
-                     ck = new RIFF::List(hFile, ulStartPos + ulPos - 4, bEndianNative, this);
+                     ck = new RIFF::List(pFile, ulStartPos + ulPos - 4, this);
                      SetPos(ck->GetSize() + LIST_HEADER_SIZE - 4, RIFF::stream_curpos);
                  }
                  else { // simple chunk
-                     ck = new RIFF::Chunk(hFile, ulStartPos + ulPos - 4, bEndianNative, this);
+                     ck = new RIFF::Chunk(pFile, ulStartPos + ulPos - 4, this);
                      SetPos(ck->GetSize() + CHUNK_HEADER_SIZE - 4, RIFF::stream_curpos);
                  }
                  pSubChunks->push_back(ck);
                  (*pSubChunksMap)[ckid] = ck;
                  if (GetPos() % 2 != 0) SetPos(1, RIFF::stream_curpos); // jump over pad byte
              }
+             SetPos(uiOriginalPos); // restore position before this call
+         }
+     }
+     /** @brief Write list chunk persistently e.g. to disk.
+      *
+      * Stores the list chunk persistently to its actual "physical" file. All
+      * subchunks (including sub list chunks) will be stored recursively as
+      * well.
+      *
+      * @param ulWritePos - position within the "physical" file where this
+      *                     list chunk should be written to
+      * @param ulCurrentDataOffset - offset of current (old) data within
+      *                              the file
+      * @returns new write position in the "physical" file, that is
+      *          \a ulWritePos incremented by this list chunk's new size
+      *          (including its header size of course)
+      */
+     unsigned long List::WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset) {
+         const unsigned long ulOriginalPos = ulWritePos;
+         ulWritePos += LIST_HEADER_SIZE;
+         if (pFile->Mode != stream_mode_read_write)
+             throw Exception("Cannot write list chunk, file has to be opened in read+write mode");
+         // write all subchunks (including sub list chunks) recursively
+         if (pSubChunks) {
+             for (ChunkList::iterator iter = pSubChunks->begin(), end = pSubChunks->end(); iter != end; ++iter) {
+                 ulWritePos = (*iter)->WriteChunk(ulWritePos, ulCurrentDataOffset);
+             }
+         }
+         // update this list chunk's header
+         CurrentChunkSize = NewChunkSize = ulWritePos - ulOriginalPos - LIST_HEADER_SIZE;
+         WriteHeader(ulOriginalPos);
+         // offset of this list chunk in new written file may have changed
+         ulStartPos = ulOriginalPos + LIST_HEADER_SIZE;
+         return ulWritePos;
+     }
+     void List::__resetPos() {
+         Chunk::__resetPos();
+         if (pSubChunks) {
+             for (ChunkList::iterator iter = pSubChunks->begin(), end = pSubChunks->end(); iter != end; ++iter) {
+                 (*iter)->__resetPos();
+             }
          }
      }
-Line 755 
 namespace RIFF {
+Line 1251 
 namespace RIFF {
  // *************** File ***************
  // *
-     File::File(const String& path) : List() {
+     /** @brief Create new RIFF file.
+      *
+      * Use this constructor if you want to create a new RIFF file completely
+      * "from scratch". 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
+      * @see AddSubChunk(), AddSubList()
+      */
+     File::File(uint32_t FileType) : List(this) {
+         hFileRead = hFileWrite = 0;
+         Mode = stream_mode_closed;
+         bEndianNative = true;
+         ulStartPos = RIFF_HEADER_SIZE;
+         ListType = FileType;
+     }
+     /** @brief Load existing RIFF file.
+      *
+      * Loads an existing RIFF file with all its chunks.
+      *
+      * @param path - path and file name of the RIFF file to open
+      * @throws RIFF::Exception if error occured while trying to load the
+      *                         given RIFF file
+      */
+     File::File(const String& path) : List(this), Filename(path) {
        #if DEBUG
        std::cout << "File::File("<<path<<")" << std::endl;
        #endif // DEBUG
          bEndianNative = true;
          #if POSIX
-         hFile = open(path.c_str(), O_RDONLY | O_NONBLOCK);
+         hFileRead = hFileWrite = open(path.c_str(), O_RDONLY | O_NONBLOCK);
-         if (hFile <= 0) {
+         if (hFileRead <= 0) {
-             hFile = 0;
+             hFileRead = hFileWrite = 0;
              throw RIFF::Exception("Can't open \"" + path + "\"");
          }
          #else
-         hFile = fopen(path.c_str(), "rb");
+         hFileRead = hFileWrite = fopen(path.c_str(), "rb");
          if (!hFile) throw RIFF::Exception("Can't open \"" + path + "\"");
          #endif // POSIX
+         Mode = stream_mode_read;
          ulStartPos = RIFF_HEADER_SIZE;
          ReadHeader(0);
          if (ChunkID != CHUNK_ID_RIFF) {
-Line 777 
 namespace RIFF {
+Line 1299 
 namespace RIFF {
          }
      }
+     String File::GetFileName() {
+         return Filename;
+     }
+     stream_mode_t File::GetMode() {
+         return Mode;
+     }
+     /** @brief Change file access mode.
+      *
+      * Changes files access mode either to read-only mode or to read/write
+      * mode.
+      *
+      * @param NewMode - new file access mode
+      * @returns true if mode was changed, false if current mode already
+      *          equals new mode
+      * @throws RIFF::Exception if new file access mode is unknown
+      */
+     bool File::SetMode(stream_mode_t NewMode) {
+         if (NewMode != Mode) {
+             switch (NewMode) {
+                 case stream_mode_read:
+                     #if POSIX
+                     if (hFileRead) close(hFileRead);
+                     hFileRead = hFileWrite = open(Filename.c_str(), O_RDONLY | O_NONBLOCK);
+                     if (hFileRead < 0) {
+                         hFileRead = hFileWrite = 0;
+                         throw Exception("Could not (re)open file \"" + Filename + "\" in read mode");
+                     }
+                     #else
+                     if (hFileRead) fclose(hFileRead);
+                     hFileRead = hFileWrite = fopen(path.c_str(), "rb");
+                     if (!hFileRead) throw Exception("Could not (re)open file \"" + Filename + "\" in read mode");
+                     #endif
+                     __resetPos(); // reset read/write position of ALL 'Chunk' objects
+                     break;
+                 case stream_mode_read_write:
+                     #if POSIX
+                     if (hFileRead) close(hFileRead);
+                     hFileRead = hFileWrite = open(Filename.c_str(), O_RDWR | O_NONBLOCK);
+                     if (hFileRead < 0) {
+                         hFileRead = hFileWrite = open(Filename.c_str(), O_RDONLY | O_NONBLOCK);
+                         throw Exception("Could not open file \"" + Filename + "\" in read+write mode");
+                     }
+                     #else
+                     if (hFileRead) fclose(hFileRead);
+                     hFileRead = hFileWrite = fopen(path.c_str(), "r+b");
+                     if (!hFileRead) {
+                         hFileRead = hFileWrite = fopen(path.c_str(), "rb");
+                         throw Exception("Could not open file \"" + Filename + "\" in read+write mode");
+                     }
+                     #endif
+                     __resetPos(); // reset read/write position of ALL 'Chunk' objects
+                     break;
+                 case stream_mode_closed:
+                     #if POSIX
+                     if (hFileRead)  close(hFileRead);
+                     if (hFileWrite) close(hFileWrite);
+                     #else
+                     if (hFileRead)  fclose(hFileRead);
+                     if (hFileWrite) fclose(hFileWrite);
+                     #endif
+                     hFileRead = hFileWrite = 0;
+                     break;
+                 default:
+                     throw Exception("Unknown file access mode");
+             }
+             Mode = NewMode;
+             return true;
+         }
+         return false;
+     }
+     /** @brief Save changes to same file.
+      *
+      * Make all changes of all chunks persistent by writing them to the
+      * actual (same) file. The file might temporarily grow to a higher size
+      * than it will have at the end of the saving process, in case chunks
+      * were grown.
+      *
+      * @throws RIFF::Exception if there is an empty chunk or empty list
+      *                         chunk or any kind of IO error occured
+      */
+     void File::Save() {
+         // reopen file in write mode
+         SetMode(stream_mode_read_write);
+         // to be able to save the whole file without loading everything into
+         // RAM and without having to store the data in a temporary file, we
+         // enlarge the file with the sum of all _positive_ chunk size
+         // changes, move current data towards the end of the file with the
+         // calculated sum and finally update / rewrite the file by copying
+         // the old data back to the right position at the beginning of the file
+         // first we sum up all positive chunk size changes (and skip all negative ones)
+         unsigned long ulPositiveSizeDiff = 0;
+         for (ChunkList::iterator iter = ResizedChunks.begin(), end = ResizedChunks.end(); iter != end; ++iter) {
+             if ((*iter)->GetNewSize() == 0) throw Exception("There is at least one empty chunk (zero size)");
+             if ((*iter)->GetNewSize() + 1L > (*iter)->GetSize()) {
+                 unsigned long ulDiff = (*iter)->GetNewSize() - (*iter)->GetSize() + 1L; // +1 in case we have to add a pad byte
+                 ulPositiveSizeDiff += ulDiff;
+             }
+         }
+         unsigned long ulWorkingFileSize = GetFileSize();
+         // if there are positive size changes...
+         if (ulPositiveSizeDiff > 0) {
+             // ... we enlarge this file first ...
+             ulWorkingFileSize += ulPositiveSizeDiff;
+             ResizeFile(ulWorkingFileSize);
+             // ... and move current data by the same amount towards end of file.
+             int8_t* pCopyBuffer = new int8_t[4096];
+             const unsigned long ulFileSize = GetSize() + RIFF_HEADER_SIZE;
+             int iBytesMoved = 1;
+             for (unsigned long ulPos = 0; iBytesMoved > 0; ulPos += iBytesMoved) {
+                 const unsigned long ulToMove = ulFileSize - ulPos;
+                 iBytesMoved = (ulToMove < 4096) ? ulToMove : 4096;
+                 #if POSIX
+                 lseek(hFileRead, ulPos, SEEK_SET);
+                 iBytesMoved = read(hFileRead, pCopyBuffer, iBytesMoved);
+                 lseek(hFileWrite, ulPos + ulPositiveSizeDiff, SEEK_SET);
+                 iBytesMoved = write(hFileWrite, pCopyBuffer, iBytesMoved);
+                 #else
+                 fseek(hFileRead, ulPos, SEEK_SET);
+                 iBytesMoved = fread(pCopyBuffer, 1, iBytesMoved, hFileRead);
+                 fseek(hFileWrite, ulPos + ulPositiveSizeDiff, SEEK_SET);
+                 iBytesMoved = fwrite(pCopyBuffer, 1, iBytesMoved, hFileWrite);
+                 #endif
+             }
+             delete[] pCopyBuffer;
+             if (iBytesMoved < 0) throw Exception("Could not modify file while trying to enlarge it");
+         }
+         // rebuild / rewrite complete RIFF tree
+         unsigned long ulTotalSize  = WriteChunk(0, ulPositiveSizeDiff);
+         unsigned long ulActualSize = __GetFileSize(hFileWrite);
+         // resize file to the final size
+         if (ulTotalSize < ulActualSize) ResizeFile(ulTotalSize);
+         // forget all resized chunks
+         ResizedChunks.clear();
+     }
+     /** @brief Save changes to another file.
+      *
+      * Make all changes of all chunks persistent by writing them to another
+      * file. <b>Caution:</b> this method is optimized for writing to
+      * <b>another</b> file, do not use it to save the changes to the same
+      * file! Use File::Save() in that case instead! Ignoring this might
+      * result in a corrupted file, especially in case chunks were resized!
+      *
+      * After calling this method, this File object will be associated with
+      * the new file (given by \a path) afterwards.
+      *
+      * @param path - path and file name where everything should be written to
+      */
+     void File::Save(const String& path) {
+         //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
+         if (Filename.length() > 0) SetMode(stream_mode_read);
+         // open the other (new) file for writing and truncate it to zero size
+         #if POSIX
+         hFileWrite = open(path.c_str(), O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP);
+         if (hFileWrite < 0) {
+             hFileWrite = hFileRead;
+             throw Exception("Could not open file \"" + path + "\" for writing");
+         }
+         #else
+         hFileWrite = fopen(path.c_str(), "w+b");
+         if (!hFileWrite) {
+             hFileWrite = hFileRead;
+             throw Exception("Could not open file \"" + path + "\" for writing");
+         }
+         #endif // POSIX
+         Mode = stream_mode_read_write;
+         // write complete RIFF tree to the other (new) file
+         unsigned long ulTotalSize  = WriteChunk(0, 0);
+         unsigned long ulActualSize = __GetFileSize(hFileWrite);
+         // resize file to the final size (if the file was originally larger)
+         if (ulTotalSize < ulActualSize) ResizeFile(ulTotalSize);
+         // forget all resized chunks
+         ResizedChunks.clear();
+         if (Filename.length() > 0) {
+             #if POSIX
+             close(hFileWrite);
+             #else
+             fclose(hFileWrite);
+             #endif
+             hFileWrite = hFileRead;
+         }
+         // associate new file with this File object from now on
+         Filename = path;
+         Mode = (stream_mode_t) -1;       // Just set it to an undefined mode ...
+         SetMode(stream_mode_read_write); // ... so SetMode() has to reopen the file handles.
+     }
+     void File::ResizeFile(unsigned long ulNewSize) {
+         #if POSIX
+         if (ftruncate(hFileWrite, ulNewSize) < 0)
+             throw Exception("Could not resize file \"" + Filename + "\"");
+         #else
+         # error Sorry, this version of libgig only supports POSIX systems yet.
+         # error Reason: portable implementation of RIFF::File::ResizeFile() is missing (yet)!
+         #endif
+     }
      File::~File() {
         #if DEBUG
         std::cout << "File::~File()" << std::endl;
         #endif // DEBUG
          #if POSIX
-         if (hFile) close(hFile);
+         if (hFileRead) close(hFileRead);
          #else
-         if (hFile) fclose(hFile);
+         if (hFileRead) fclose(hFileRead);
          #endif // POSIX
      }
+     void File::LogAsResized(Chunk* pResizedChunk) {
+         ResizedChunks.push_back(pResizedChunk);
+     }
      unsigned long File::GetFileSize() {
-         #if POSIX
+         return __GetFileSize(hFileRead);
+     }
+     #if POSIX
+     unsigned long File::__GetFileSize(int hFile) {
          struct stat filestat;
          fstat(hFile, &filestat);
          long size = filestat.st_size;
-         #else // standard C functions
+         return size;
+     }
+     #else // standard C functions
+     unsigned long File::__GetFileSize(FILE* hFile) {
          long curpos = ftell(hFile);
          fseek(hFile, 0, SEEK_END);
          long size = ftell(hFile);
          fseek(hFile, curpos, SEEK_SET);
-         #endif // POSIX
          return size;
      }
+     #endif
  // *************** Exception ***************
-Line 811 
 namespace RIFF {
+Line 1556 
 namespace RIFF {
          std::cout << "RIFF::Exception: " << Message << std::endl;
      }
+ // *************** functions ***************
+ // *
+     /**
+      * Returns the name of this C++ library. This is usually "libgig" of
+      * course. This call is equivalent to DLS::libraryName() and
+      * gig::libraryName().
+      */
+     String libraryName() {
+         return PACKAGE;
+     }
+     /**
+      * Returns version of this C++ library. This call is equivalent to
+      * DLS::libraryVersion() and gig::libraryVersion().
+      */
+     String libraryVersion() {
+         return VERSION;
+     }
  } // namespace RIFF
- #endif

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+Added in v.802

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