public DatDatabase(string filePath, bool keepOpen = false)
{
if (!File.Exists(filePath))
{
throw new FileNotFoundException(filePath);
}
FilePath = filePath;
stream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
stream.Seek(DAT_HEADER_OFFSET, SeekOrigin.Begin);
using (var reader = new BinaryReader(stream, System.Text.Encoding.Default, true))
Header.Unpack(reader);
RootDirectory = new DatDirectory(Header.BTree, Header.BlockSize);
RootDirectory.Read(stream);
if (!keepOpen)
{
stream.Close();
stream.Dispose();
stream = null;
}
RootDirectory.AddFilesToList(AllFiles);
}
public void Read(FileStream stream)
{
var headerReader = new DatReader(stream, rootSectorOffset, DatDirectoryHeader.ObjectSize, blockSize);
using (var memoryStream = new MemoryStream(headerReader.Buffer))
using (var reader = new BinaryReader(memoryStream))
DatDirectoryHeader.Unpack(reader);
// directory is allowed to have files + 1 subdirectories
if (DatDirectoryHeader.Branches[0] != 0)
{
for (int i = 0; i < DatDirectoryHeader.EntryCount + 1; i++)
{
var directory = new DatDirectory(DatDirectoryHeader.Branches[i], blockSize);
directory.Read(stream);
Directories.Add(directory);
}
}
}