/// <summary> /// Constructor for FatFileSystem in specified readOnly mode /// </summary> /// <param name="device">the <see cref="IBlockDevice"/> holding the file system</param> /// <param name="readOnly"></param> /// <param name="ignoreFatDifferences"></param> /// <exception cref="IOException">IOException on read error</exception> private FatFileSystem(IBlockDevice device, bool readOnly, bool ignoreFatDifferences) : base(readOnly) { bs = BootSector.Read(device); if (bs.GetNrFats() <= 0) { throw new IOException( "boot sector says there are no FATs"); } filesOffset = FatUtils.GetFilesOffset(bs); fatType = bs.GetFatType(); fat = Fat.Read(bs, 0); if (!ignoreFatDifferences) { for (var i = 1; i < bs.GetNrFats(); i++) { var tmpFat = Fat.Read(bs, i); if (!fat.Equals(tmpFat)) { throw new IOException("FAT " + i + " differs from FAT 0"); } } } if (fatType == FatType.BaseFat32) { var f32Bs = (Fat32BootSector)bs; var rootDirFile = new ClusterChain(fat, f32Bs.GetRootDirFirstCluster(), IsReadOnly()); rootDirStore = ClusterChainDirectory.ReadRoot(rootDirFile); fsiSector = FsInfoSector.Read(f32Bs); if (fsiSector.GetFreeClusterCount() != fat.GetFreeClusterCount()) { throw new IOException("free cluster count mismatch - fat: " + fat.GetFreeClusterCount() + " - fsinfo: " + fsiSector.GetFreeClusterCount()); } } else { rootDirStore = Fat16RootDirectory.Read((Fat16BootSector)bs, readOnly); fsiSector = null; } rootDir = new FatLfnDirectory(rootDirStore, fat, IsReadOnly()); }
internal FatLfnDirectory(AbstractDirectory dir, Fat fat, bool readOnly) : base(readOnly) { if ((dir == null) || (fat == null)) { throw new NullReferenceException(); } this.fat = fat; this.Dir = dir; shortNameIndex = new Dictionary <ShortName, FatLfnDirectoryEntry>(); longNameIndex = new Dictionary <string, FatLfnDirectoryEntry>(); entryToFile = new Dictionary <FatDirectoryEntry, FatFile>(); entryToDirectory = new Dictionary <FatDirectoryEntry, FatLfnDirectory>(); usedNames = new HashSet <string>(); dbg = new Dummy83BufferGenerator(); ParseLfn(); }