private void PackSlotFillers(BTreeAlgorithm parent, System.IO.BinaryWriter writer,
object simpleKey, ref int keySizeOnDisk, ref byte[] keyOfEmptySlots)
{
// write filler space same size as VersionNumber
CollectionOnDisk.WritePersistentData(parent, 0L, writer);
// write filler space same size as Key
if (keySizeOnDisk > 0 || simpleKey == null)
{
if (keySizeOnDisk == 0)
{
keySizeOnDisk = 20;
keySizeOnDisk += (sizeof(long) * 2);
}
if (keyOfEmptySlots == null)
{
keyOfEmptySlots = new byte[keySizeOnDisk];
}
CollectionOnDisk.WritePersistentData(parent, keyOfEmptySlots, writer, ItemType.Key);
}
else
{
CollectionOnDisk.WritePersistentData(parent, simpleKey, writer, ItemType.Key);
}
// write filler space same size as Value's Address on disk
//CollectionOnDisk.WritePersistentData(parent, -1L, writer);
}
private void PackSlotItem(BTreeAlgorithm parent, System.IO.BinaryWriter writer,
BTreeItemOnDisk slot, ref int keySizeOnDisk, bool?isKeySimpleType)
{
if (slot != null)
{
IO.OnDiskBinaryWriter _writer = (IO.OnDiskBinaryWriter)writer;
long streamPos = _writer.LogicalPosition;
if (slot.Value.IsDirty)
{
slot.VersionNumber++;
}
CollectionOnDisk.WritePersistentData(parent, slot.VersionNumber, writer);
CollectionOnDisk.WritePersistentData(parent, slot.Key, writer, ItemType.Key);
if (parent.IsDataInKeySegment)
{
if (parent.IsDataLongInt)
{
writer.Write((long)slot.Value.Data);
}
else
{
if (parent.PersistenceType == PersistenceType.Unknown)
{
parent.PersistenceType =
CollectionOnDisk.GetPersistenceType(parent, slot.Value.Data, ItemType.Value);
parent.IsDirty = true;
}
//** write the value and keep track of its data size and location in the disk buffer.
//slot.ValueBlockIndex = DiskBuffer.GetIndexOf(((OnDiskBinaryWriter)writer).DataBlock);
//slot.ValueIndexInBlock = ((OnDiskBinaryWriter) writer).DataBlockPosition;
long startPos = _writer.LogicalPosition;
//parent.PersistenceType
CollectionOnDisk.WritePersistentData(parent, slot.Value.Data, writer, ItemType.Value);
slot.HintSizeOnDisk = (int)(_writer.LogicalPosition - startPos);
//**
}
slot.Value.IsDirty = false;
}
else
{
if (slot.Value.diskBuffer == null)
{
slot.Value.DiskBuffer = parent.CreateBlock(); //new Sop.DataBlock(parent.DataBlockSize);
}
writer.Write(parent.GetId(slot.Value.DiskBuffer));
}
if (keySizeOnDisk == 0)
{
int keyDataSize = (int)(_writer.LogicalPosition - streamPos);
keySizeOnDisk = keyDataSize;
parent.HintKeySizeOnDisk = keyDataSize;
}
}
}
