internal Segment <byte> this[Hid hid]
{
get
{
var page = _pages[hid.BlockIndex];
return(page[hid.Index - 1]);
}
}
private void ProcessHeader()
{
var header = Heap[_headerHid];
Validate.Match(header[0], 0xb5, "Invalid type");
_keySize = header[1];
_valueSize = header[2];
_elementSize = _keySize + _valueSize;
_indexLevels = header[3];
_rootHid = header.ToUInt32(4);
}
internal BTree(
Heap heap,
Hid headerHid,
Func <Segment <byte>, TKey> keyFactory,
Func <Segment <byte>, T> valueFactory)
{
Heap = heap;
_headerHid = headerHid;
_keyFactory = keyFactory;
_valueFactory = valueFactory;
ProcessHeader();
}
private void Initialize()
{
var block = _reader.FindBlock(_node.DataBid);
if (_node.DataBid.Type == BlockType.Internal)
{
BuildDataTreePages(block);
ClientSignature = _pages[0].Data[3];
UserRoot = _pages[0].Data.Derive(4, 4).ToUInt32();
}
else
{
_pages.Add(new HeapPage(block.Data));
ClientSignature = block.Data[3];
UserRoot = block.Data.Segment(4, 4).ToUInt32();
}
}
