public HfsPlusFileSystemImpl(Stream s)
: base(new DiscFileSystemOptions())
{
s.Position = 1024;
byte[] headerBuf = Utilities.ReadFully(s, 512);
VolumeHeader hdr = new VolumeHeader();
hdr.ReadFrom(headerBuf, 0);
Context = new HfsPlus.Context();
Context.VolumeStream = s;
Context.VolumeHeader = hdr;
FileBuffer catalogBuffer = new FileBuffer(Context, hdr.CatalogFile, CatalogNodeId.CatalogFileId);
Context.Catalog = new BTree <CatalogKey>(catalogBuffer);
FileBuffer extentsBuffer = new FileBuffer(Context, hdr.ExtentsFile, CatalogNodeId.ExtentsFileId);
Context.ExtentsOverflow = new BTree <ExtentKey>(extentsBuffer);
// Establish Root directory
byte[] rootThreadData = Context.Catalog.Find(new CatalogKey(CatalogNodeId.RootFolderId, string.Empty));
CatalogThread rootThread = new CatalogThread();
rootThread.ReadFrom(rootThreadData, 0);
byte[] rootDirEntryData = Context.Catalog.Find(new CatalogKey(rootThread.ParentId, rootThread.Name));
DirEntry rootDirEntry = new DirEntry(rootThread.Name, rootDirEntryData);
RootDirectory = (Directory)GetFile(rootDirEntry);
}
/// <summary>
/// Initializes a new instance of the <see cref="HfsPlusFileSystemImpl"/> class.
/// </summary>
/// <param name="stream">A stream containing the file system.</param>
public HfsPlusFileSystemImpl(Stream stream)
: base(new DiscFileSystemOptions())
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (stream.Length < 0x600)
{
throw new InvalidDataException("The stream does not represent a valid HFS+ file system");
}
stream.Position = 1024;
byte[] headerBuf = StreamUtilities.ReadExact(stream, 512);
VolumeHeader hdr = new VolumeHeader();
hdr.ReadFrom(headerBuf, 0);
if (!hdr.IsValid)
{
throw new InvalidDataException("The stream does not represent a valid HFS+ file system");
}
this.Context = new Context();
this.Context.VolumeStream = stream;
this.Context.VolumeHeader = hdr;
FileBuffer catalogBuffer = new FileBuffer(this.Context, hdr.CatalogFile, CatalogNodeId.CatalogFileId);
this.Context.Catalog = new BTree <CatalogKey>(catalogBuffer);
FileBuffer extentsBuffer = new FileBuffer(this.Context, hdr.ExtentsFile, CatalogNodeId.ExtentsFileId);
this.Context.ExtentsOverflow = new BTree <ExtentKey>(extentsBuffer);
FileBuffer attributesBuffer = new FileBuffer(this.Context, hdr.AttributesFile, CatalogNodeId.AttributesFileId);
this.Context.Attributes = new BTree <AttributeKey>(attributesBuffer);
// Establish Root directory
byte[] rootThreadData = this.Context.Catalog.Find(new CatalogKey(CatalogNodeId.RootFolderId, string.Empty));
CatalogThread rootThread = new CatalogThread();
rootThread.ReadFrom(rootThreadData, 0);
byte[] rootDirEntryData = this.Context.Catalog.Find(new CatalogKey(rootThread.ParentId, rootThread.Name));
DirEntry rootDirEntry = new DirEntry(rootThread.Name, rootDirEntryData);
this.RootDirectory = (HfsPlusDirectory)this.GetFile(rootDirEntry);
}
