internal ClusterStream(FatFileSystem fileSystem, FileAccess access, uint firstCluster, uint length)
{
_access = access;
_reader = fileSystem.ClusterReader;
_fat = fileSystem.Fat;
_length = length;
_knownClusters = new List<uint>();
if (firstCluster != 0)
{
_knownClusters.Add(firstCluster);
}
else
{
_knownClusters.Add(FatBuffer.EndOfChain);
}
if (_length == uint.MaxValue)
{
_length = DetectLength();
}
_currentCluster = uint.MaxValue;
_clusterBuffer = new byte[_reader.ClusterSize];
}
/// <summary>
/// Initializes a new instance of the Directory class. Use this constructor to represent the root directory.
/// </summary>
/// <param name="fileSystem">The file system</param>
/// <param name="dirStream">The stream containing the directory info</param>
internal Directory(FatFileSystem fileSystem, Stream dirStream)
{
_fileSystem = fileSystem;
_dirStream = dirStream;
LoadEntries();
}
public FatFileStream(FatFileSystem fileSystem, Directory dir, long fileId, FileAccess access)
{
_dir = dir;
_dirId = fileId;
DirectoryEntry dirEntry = _dir.GetEntry(_dirId);
_stream = new ClusterStream(fileSystem, access, (uint)dirEntry.FirstCluster, (uint)dirEntry.FileSize);
_stream.FirstClusterChanged += FirstClusterAllocatedHandler;
}
/// <summary>
/// Initializes a new instance of the Directory class. Use this constructor to represent non-root directories.
/// </summary>
/// <param name="parent">The parent directory</param>
/// <param name="parentId">The identity of the entry representing this directory in the parent</param>
internal Directory(Directory parent, long parentId)
{
_fileSystem = parent._fileSystem;
_parent = parent;
_parentId = parentId;
DirectoryEntry dirEntry = ParentsChildEntry;
_dirStream = new ClusterStream(_fileSystem, FileAccess.ReadWrite, dirEntry.FirstCluster, uint.MaxValue);
LoadEntries();
}
