public Index(string nm, ushort kl, DateTime udTime)
{
int sz = DataFile.GetSize(Root);
if (DataFile.Exists(nm, "Index"))
{
File = DataFile.Open(nm, "Index", FileMode.Open);
File.Read(Root, DataFile.coSignatureSz, sz);
if (DateTime.Compare(Root.LastUpdate, udTime) >= 0 && Root.Closed)
{
Root.Closed = false;
File.Lock(Root);
File.Write(Root);
return;
}
File.Close();
DataFile.Delete(nm, "Index");
}
File = DataFile.Open(nm, "Index", FileMode.CreateNew);
DataFile.Blank(Root, sz);
Root.KeyLength = kl;
Root.Closed = false;
Root.PageSize = (ushort)DataFile.GetSize(new IdxPage(0, 0, 0, kl));
File.Append(Root, sz);
File.Lock(Root);
}
internal static void Destroy(String nm)
{
TableFile db;
if (OpenList.TryGetValue(nm, out db))
{
throw new System.InvalidOperationException("MinBase: Cannot delete table " + nm + " because it is currently open.");
}
DataFile.Delete(nm, "Table");
}
internal void Close(Table obj)
{
SyncOpen.WaitOne();
View vw = obj.Order;
obj.LoTable = null;
obj.Order = null;
if (vw != null && vw.Close())
{
SyncView.WaitOne();
ViewList.Remove(vw.getkey);
SyncView.ReleaseMutex();
}
if (OpenCount == 1)
{
string tmpfile = "";
if (MustPack)
{
Struct.LastUpdate = DateTime.Now;
tmpfile = String.Format("{0}{1:yyyy}{1:MM}{1:dd}{1:HH}{1:mm}{1:ss}", Alias, Struct.LastUpdate);
File.CopyTo(tmpfile, "BackupTable");
long r, w, x;
w = 1;
x = Struct.RowCount;
for (r = 1; r <= x; r++)
{
Read(obj, r);
if (!Deleted(obj))
{
if (w != r)
{
obj.Buffer.Position = Data + (w - 1) * Struct.RowLength;
File.Write(obj);
}
w++;
}
}
Struct.LastUpdate = DateTime.Now;
Struct.RowCount = w - 1;
File.LoFile.SetLength(Data + Struct.RowLength * Struct.RowCount);
}
File.Write(Struct);
File.Close();
if (MustPack)
{
DataFile.Delete(tmpfile, "BackupTable");
}
OpenList.Remove(Alias);
}
else
{
OpenCount--;
}
SyncOpen.ReleaseMutex();
}