public FileHashDB(string FullFilePath, short _BlockSize, OnReadyHandler rCB)
{
Map = new Hashtable();
ObjectReadCB = new OnReadHandler(ReadObjectSink);
OnReady += rCB;
MaxBlockSize = _BlockSize;
fstream = new FileStream(FullFilePath, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.Read);
DBFileInfo = new FileInfo(FullFilePath);
DeleteBuffer = new byte[MaxBlockSize];
DeleteCB = new AsyncCallback(DeleteSink);
ClearCB = new AsyncCallback(ClearSink);
MemoryStream ms = new MemoryStream();
byte[] x = BitConverter.GetBytes((short)0);
ms.Write(x, 0, x.Length);
ms.Write(x, 0, x.Length);
ClearBlock = ms.ToArray();
ms.Close();
if (fstream.Length > 0)
{
// Already Exists
SeekLock.WaitOne();
fstream.Seek(0, SeekOrigin.Begin);
fstream.BeginRead(InitBuffer, 0, 10, new AsyncCallback(InitSink), null);
SeekLock.ReleaseMutex();
}
else
{
IndexFilePath = DBFileInfo.FullName.Substring(0, DBFileInfo.FullName.Length - DBFileInfo.Extension.Length) + ".idx";
// Initialize File Header
byte[] BlockSize = BitConverter.GetBytes((short)MaxBlockSize);
byte[] bUpdateID = BitConverter.GetBytes(UpdateID);
byte[] eVersion = BitConverter.GetBytes(EngineVersion);
SeekLock.WaitOne();
fstream.Seek(0, SeekOrigin.Begin);
InitializeCounter = 3;
fstream.BeginWrite(BlockSize, 0, 2, new AsyncCallback(InitHeaderSink), null);
fstream.BeginWrite(bUpdateID, 0, 4, new AsyncCallback(InitHeaderSink), null);
fstream.BeginWrite(eVersion, 0, 4, new AsyncCallback(InitHeaderSink), null);
SeekLock.ReleaseMutex();
if (Interlocked.Decrement(ref InitializeCounter) == 0)
{
if (OnReady != null)
{
OnReady(this, null);
}
}
}
}
public FileHashDB(string FullFilePath, short _BlockSize, OnReadyHandler rCB)
{
Map = new Hashtable();
ObjectReadCB = new OnReadHandler(ReadObjectSink);
OnReady += rCB;
MaxBlockSize = _BlockSize;
fstream = new FileStream(FullFilePath,FileMode.OpenOrCreate,FileAccess.ReadWrite,FileShare.Read);
DBFileInfo = new FileInfo(FullFilePath);
DeleteBuffer = new byte[MaxBlockSize];
DeleteCB = new AsyncCallback(DeleteSink);
ClearCB = new AsyncCallback(ClearSink);
MemoryStream ms = new MemoryStream();
byte[] x = BitConverter.GetBytes((short)0);
ms.Write(x,0,x.Length);
ms.Write(x,0,x.Length);
ClearBlock = ms.ToArray();
ms.Close();
if(fstream.Length>0)
{
// Already Exists
SeekLock.WaitOne();
fstream.Seek(0,SeekOrigin.Begin);
fstream.BeginRead(InitBuffer,0,10,new AsyncCallback(InitSink),null);
SeekLock.ReleaseMutex();
}
else
{
IndexFilePath = DBFileInfo.FullName.Substring(0,DBFileInfo.FullName.Length-DBFileInfo.Extension.Length) + ".idx";
// Initialize File Header
byte[] BlockSize = BitConverter.GetBytes((short)MaxBlockSize);
byte[] bUpdateID = BitConverter.GetBytes(UpdateID);
byte[] eVersion = BitConverter.GetBytes(EngineVersion);
SeekLock.WaitOne();
fstream.Seek(0,SeekOrigin.Begin);
InitializeCounter = 3;
fstream.BeginWrite(BlockSize,0,2,new AsyncCallback(InitHeaderSink),null);
fstream.BeginWrite(bUpdateID,0,4,new AsyncCallback(InitHeaderSink),null);
fstream.BeginWrite(eVersion,0,4,new AsyncCallback(InitHeaderSink),null);
SeekLock.ReleaseMutex();
if(Interlocked.Decrement(ref InitializeCounter)==0)
{
if(OnReady!=null) OnReady(this,null);
}
}
}
