public Usage Count_Empty_Slots()
{
int invalid = 0;
int valid = 0;
int blockSize = _node_Factory.Size_In_Bytes(3);
long position = Index_Stream.Position;
Index_Stream.Seek(8, SeekOrigin.Begin);
var buffer = new byte[blockSize];
while (Index_Stream.Read(buffer, 0, buffer.Length) > 0)
{
var node = _node_Factory.From_Bytes(buffer, 3);
if (node.IsValid)
{
valid++;
}
else
{
invalid++;
}
}
int used = valid * blockSize;
int wasted = invalid * blockSize;
Index_Stream.Seek(position, SeekOrigin.Begin);
return(new Usage {
Invalid = invalid, Valid = valid
});
}
protected Node <T> Read_Node(long address)
{
var buffer = new byte[_block_Size];
Index_Stream.Seek(address, SeekOrigin.Begin);
Index_Stream.Read(buffer, 0, buffer.Length);
return(_node_Factory.From_Bytes(buffer, Order));
}
