private bool Write(ref uint pos, byte[] buf, int oldSize)
{
oldSize = ((oldSize + 7) & 0x7FFFFFF8);
uint oldPos = pos;
CopyBytes(Crc16.ComputeChecksum(buf, buf.Length - 2), buf, buf.Length - 2);
if (((buf.Length + 7) & 0x00FFFFF8) != oldSize)
{
if (pos > 0)
{
AddFree(pos, oldSize);
}
pos = FindFree(buf.Length);
}
ToSave((long)pos << 3, buf);
return(pos != oldPos);
}
private void AddTopic(Topic t, Record r)
{
if (r.saved != 0)
{
t[Topic.MaskType.saved] = true;
if (r.saved == FL_SAVED_E)
{
byte[] lBuf = new byte[4];
_file.Position = (long)r.data_pos << 3;
_file.Read(lBuf, 0, 4);
int data_size = BitConverter.ToInt32(lBuf, 0);
if ((data_size & (FL_REMOVED | FL_RECORD)) == 0)
{
r.data_size = data_size - 6;
byte[] buf = new byte[data_size];
lBuf.CopyTo(buf, 0);
_file.Read(buf, 4, buf.Length - 4);
ushort crc1 = BitConverter.ToUInt16(buf, buf.Length - 2);
ushort crc2 = Crc16.ComputeChecksum(buf, buf.Length - 2);
if (crc1 != crc2)
{
throw new ApplicationException("CRC Error Data@0x" + ((long)r.pos << 3).ToString("X8"));
}
r.data = Encoding.UTF8.GetString(buf, 4, (int)r.data_size);
}
}
t.SetJson(r.data);
}
Console.WriteLine("{0}={1} [0x{2:X4}]", t.path, t.value, r.pos);
_tr[t] = r;
int idx = indexPPos(_refitParent, r.pos);
while (idx >= 0 && idx < _refitParent.Count && _refitParent[idx].parent == r.pos)
{
Record nextR = _refitParent[idx];
_refitParent.RemoveAt(idx);
AddTopic(t.Get(nextR.name, null), nextR);
idx = indexPPos(_refitParent, r.pos);
}
}
public void Open()
{
if (!Directory.Exists("../data"))
{
Directory.CreateDirectory("../data");
}
_file = new FileStream("../data/persist.xdb", FileMode.OpenOrCreate, FileAccess.ReadWrite);
if (_file.Length < 0x40)
{
_file.Write(new byte[0x40], 0, 0x40);
}
else
{
_file.Position = 0x40;
long curPos;
byte[] lBuf = new byte[4];
_refitParent = new List <Record>();
Topic t;
do
{
curPos = _file.Position;
_file.Read(lBuf, 0, 4);
uint fl_size = BitConverter.ToUInt32(lBuf, 0);
int len = (int)fl_size & (((fl_size & FL_RECORD) != 0)?FL_REC_LEN:FL_DATA_LEN);
if ((fl_size & FL_REMOVED) != 0)
{
AddFree((uint)(curPos >> 3), (int)fl_size);
}
else if ((fl_size & FL_RECORD) != 0)
{
byte[] buf = new byte[len];
lBuf.CopyTo(buf, 0);
_file.Read(buf, 4, len - 4);
ushort crc1 = BitConverter.ToUInt16(buf, len - 2);
ushort crc2 = Crc16.ComputeChecksum(buf, len - 2);
if (crc1 != crc2)
{
throw new ApplicationException("CRC Error Record@0x" + curPos.ToString("X8"));
}
var r = new Record((uint)(curPos >> 3), buf);
if (r.parent == 0)
{
if (r.name == "/")
{
t = Topic.root;
}
else
{
t = null;
}
}
else if (r.parent < r.pos)
{
t = _tr.FirstOrDefault(z => z.Value.pos == r.parent).Key;
if (t != null)
{
t = t.Get(r.name, null);
}
}
else
{
t = null;
}
if (t != null)
{
AddTopic(t, r);
}
else
{
int idx = indexPPos(_refitParent, r.parent);
_refitParent.Insert(idx + 1, r);
}
}
_file.Position = curPos + ((len + 7) & 0x7FFFFFF8);
} while(_file.Position < _file.Length);
_refitParent = null;
}
_fileLength = _file.Length;
Backup();
ThreadPool.QueueUserWorkItem(FileOperations);
Topic.root.all.changed += TopicChanged;
}