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

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revision 2120 by persson, Sun Aug 29 11:10:36 2010 UTC revision 2482 by schoenebeck, Mon Nov 25 02:22:38 2013 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   libgig - C++ cross-platform Gigasampler format file access library    *   *   libgig - C++ cross-platform Gigasampler format file access library    *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003-2009 by Christian Schoenebeck                      *   *   Copyright (C) 2003-2013 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 595  namespace RIFF { Line 595  namespace RIFF {
595      }      }
596    
597      /**      /**
598         * Reads a null-padded string of size characters and copies it
599         * into the string \a s. The position within the chunk will
600         * automatically be incremented.
601         *
602         * @param s                 destination string
603         * @param size              number of characters to read
604         * @throws RIFF::Exception  if an error occured or less than
605         *                          \a size characters could be read!
606         */
607        void Chunk::ReadString(String& s, int size) {
608            char* buf = new char[size];
609            ReadSceptical(buf, 1, size);
610            s.assign(buf, std::find(buf, buf + size, '\0'));
611            delete[] buf;
612        }
613    
614        /**
615       * Writes \a WordCount number of 32 Bit unsigned integer words from the       * Writes \a WordCount number of 32 Bit unsigned integer words from the
616       * buffer pointed by \a pData to the chunk's body, directly to the       * buffer pointed by \a pData to the chunk's body, directly to the
617       * actual "physical" file. The position within the chunk will       * actual "physical" file. The position within the chunk will
# Line 1402  namespace RIFF { Line 1419  namespace RIFF {
1419       * @param FileType - four-byte identifier of the RIFF file type       * @param FileType - four-byte identifier of the RIFF file type
1420       * @see AddSubChunk(), AddSubList(), SetByteOrder()       * @see AddSubChunk(), AddSubList(), SetByteOrder()
1421       */       */
1422      File::File(uint32_t FileType) : List(this) {      File::File(uint32_t FileType) : List(this), bIsNewFile(true) {
1423          //HACK: see _GET_RESIZED_CHUNKS() comment          //HACK: see _GET_RESIZED_CHUNKS() comment
1424          ResizedChunks.push_back(reinterpret_cast<Chunk*>(new std::set<Chunk*>));          ResizedChunks.push_back(reinterpret_cast<Chunk*>(new std::set<Chunk*>));
1425          #if defined(WIN32)          #if defined(WIN32)
# Line 1424  namespace RIFF { Line 1441  namespace RIFF {
1441       * @throws RIFF::Exception if error occured while trying to load the       * @throws RIFF::Exception if error occured while trying to load the
1442       *                         given RIFF file       *                         given RIFF file
1443       */       */
1444      File::File(const String& path) : List(this), Filename(path) {      File::File(const String& path) : List(this), Filename(path), bIsNewFile(false) {
1445        #if DEBUG         #if DEBUG
1446        std::cout << "File::File("<<path<<")" << std::endl;         std::cout << "File::File("<<path<<")" << std::endl;
1447        #endif // DEBUG         #endif // DEBUG
1448          bEndianNative = true;          try {
1449          //HACK: see _GET_RESIZED_CHUNKS() comment              bEndianNative = true;
1450          ResizedChunks.push_back(reinterpret_cast<Chunk*>(new std::set<Chunk*>));              //HACK: see _GET_RESIZED_CHUNKS() comment
1451          #if POSIX              ResizedChunks.push_back(reinterpret_cast<Chunk*>(new std::set<Chunk*>));
1452          hFileRead = hFileWrite = open(path.c_str(), O_RDONLY | O_NONBLOCK);              #if POSIX
1453          if (hFileRead <= 0) {              hFileRead = hFileWrite = open(path.c_str(), O_RDONLY | O_NONBLOCK);
1454              hFileRead = hFileWrite = 0;              if (hFileRead <= 0) {
1455              throw RIFF::Exception("Can't open \"" + path + "\"");                  hFileRead = hFileWrite = 0;
1456          }                  throw RIFF::Exception("Can't open \"" + path + "\"");
1457          #elif defined(WIN32)              }
1458          hFileRead = hFileWrite = CreateFile(              #elif defined(WIN32)
1459                                       path.c_str(), GENERIC_READ,              hFileRead = hFileWrite = CreateFile(
1460                                       FILE_SHARE_READ | FILE_SHARE_WRITE,                                           path.c_str(), GENERIC_READ,
1461                                       NULL, OPEN_EXISTING,                                           FILE_SHARE_READ | FILE_SHARE_WRITE,
1462                                       FILE_ATTRIBUTE_NORMAL |                                           NULL, OPEN_EXISTING,
1463                                       FILE_FLAG_RANDOM_ACCESS, NULL                                           FILE_ATTRIBUTE_NORMAL |
1464                                   );                                           FILE_FLAG_RANDOM_ACCESS, NULL
1465          if (hFileRead == INVALID_HANDLE_VALUE) {                                       );
1466              hFileRead = hFileWrite = INVALID_HANDLE_VALUE;              if (hFileRead == INVALID_HANDLE_VALUE) {
1467              throw RIFF::Exception("Can't open \"" + path + "\"");                  hFileRead = hFileWrite = INVALID_HANDLE_VALUE;
1468                    throw RIFF::Exception("Can't open \"" + path + "\"");
1469                }
1470                #else
1471                hFileRead = hFileWrite = fopen(path.c_str(), "rb");
1472                if (!hFileRead) throw RIFF::Exception("Can't open \"" + path + "\"");
1473                #endif // POSIX
1474                Mode = stream_mode_read;
1475                ulStartPos = RIFF_HEADER_SIZE;
1476                ReadHeader(0);
1477                if (ChunkID != CHUNK_ID_RIFF && ChunkID != CHUNK_ID_RIFX) {
1478                    throw RIFF::Exception("Not a RIFF file");
1479                }
1480          }          }
1481          #else          catch (...) {
1482          hFileRead = hFileWrite = fopen(path.c_str(), "rb");              Cleanup();
1483          if (!hFileRead) throw RIFF::Exception("Can't open \"" + path + "\"");              throw;
         #endif // POSIX  
         Mode = stream_mode_read;  
         ulStartPos = RIFF_HEADER_SIZE;  
         ReadHeader(0);  
         if (ChunkID != CHUNK_ID_RIFF && ChunkID != CHUNK_ID_RIFX) {  
             throw RIFF::Exception("Not a RIFF file");  
1484          }          }
1485      }      }
1486    
1487      String File::GetFileName() {      String File::GetFileName() {
1488          return Filename;          return Filename;
1489      }      }
1490        
1491        void File::SetFileName(const String& path) {
1492            Filename = path;
1493        }
1494    
1495      stream_mode_t File::GetMode() {      stream_mode_t File::GetMode() {
1496          return Mode;          return Mode;
# Line 1695  namespace RIFF { Line 1722  namespace RIFF {
1722          // make sure the RIFF tree is built (from the original file)          // make sure the RIFF tree is built (from the original file)
1723          LoadSubChunksRecursively();          LoadSubChunksRecursively();
1724    
1725          if (Filename.length() > 0) SetMode(stream_mode_read);          if (!bIsNewFile) SetMode(stream_mode_read);
1726          // open the other (new) file for writing and truncate it to zero size          // open the other (new) file for writing and truncate it to zero size
1727          #if POSIX          #if POSIX
1728          hFileWrite = open(path.c_str(), O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP);          hFileWrite = open(path.c_str(), O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP);
# Line 1743  namespace RIFF { Line 1770  namespace RIFF {
1770    
1771          // associate new file with this File object from now on          // associate new file with this File object from now on
1772          Filename = path;          Filename = path;
1773            bIsNewFile = false;
1774          Mode = (stream_mode_t) -1;       // Just set it to an undefined mode ...          Mode = (stream_mode_t) -1;       // Just set it to an undefined mode ...
1775          SetMode(stream_mode_read_write); // ... so SetMode() has to reopen the file handles.          SetMode(stream_mode_read_write); // ... so SetMode() has to reopen the file handles.
1776      }      }
# Line 1766  namespace RIFF { Line 1794  namespace RIFF {
1794         #if DEBUG         #if DEBUG
1795         std::cout << "File::~File()" << std::endl;         std::cout << "File::~File()" << std::endl;
1796         #endif // DEBUG         #endif // DEBUG
1797            Cleanup();
1798        }
1799        
1800        /**
1801         * Returns @c true if this file has been created new from scratch and
1802         * has not been stored to disk yet.
1803         */
1804        bool File::IsNew() const {
1805            return bIsNewFile;
1806        }
1807    
1808        void File::Cleanup() {
1809          #if POSIX          #if POSIX
1810          if (hFileRead) close(hFileRead);          if (hFileRead) close(hFileRead);
1811          #elif defined(WIN32)          #elif defined(WIN32)
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