internal static bool Detect(Stream stream)
{
if (stream.Length < 1536)
{
return(false);
}
stream.Position = 1024;
byte[] headerBuf = StreamUtilities.ReadExact(stream, 512);
MasterDirectoryBlock hdr = new MasterDirectoryBlock();
hdr.ReadFrom(headerBuf, 0);
return(hdr.IsValid);
}
public HfsFileSystemImpl(Stream s)
: base(new DiscFileSystemOptions())
{
s.Position = 1024;
// Master block in HFS is 162 byes
byte[] headerBuf = StreamUtilities.ReadExact(s, 162);
MasterDirectoryBlock hdr = new MasterDirectoryBlock();
hdr.ReadFrom(headerBuf, 0);
Context = new Context();
Context.VolumeStream = s;
Context.MasterDirectoryBlock = hdr;
//FileBuffer catalogBuffer = new FileBuffer(Context, hdr.CatalogFile, CatalogNodeId.CatalogFileId);
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);
//FileBuffer attributesBuffer = new FileBuffer(Context, hdr.AttributesFile, CatalogNodeId.AttributesFileId);
//Context.Attributes = new BTree<AttributeKey>(attributesBuffer);
// 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);
}
