private void DeallocateNode(ServerProcess AProcess, StreamID AStreamID)
{
using (IndexNode LIndexNode = new IndexNode(AProcess, this, AStreamID))
{
for (int LEntryIndex = LIndexNode.EntryCount - 1; LEntryIndex >= 0; LEntryIndex--)
{
if (LIndexNode.NodeType == IndexNodeType.Routing)
{
if (LEntryIndex > 0)
{
DisposeKey(AProcess, LIndexNode.Key(LEntryIndex));
}
DeallocateNode(AProcess, IndexUtility.GetStreamID(LIndexNode.Data(LEntryIndex), 0));
}
else
{
DisposeKey(AProcess, LIndexNode.Key(LEntryIndex));
DisposeData(AProcess, LIndexNode.Data(LEntryIndex));
if (LIndexNode.NextNode == StreamID.Null)
{
FTailID = LIndexNode.PriorNode;
}
else
{
using (IndexNode LNextNode = new IndexNode(AProcess, this, LIndexNode.NextNode))
{
LNextNode.PriorNode = LIndexNode.PriorNode;
}
}
if (LIndexNode.PriorNode == StreamID.Null)
{
FHeadID = LIndexNode.NextNode;
}
else
{
using (IndexNode LPriorNode = new IndexNode(AProcess, this, LIndexNode.PriorNode))
{
LPriorNode.NextNode = LIndexNode.NextNode;
}
}
}
}
}
AProcess.StreamManager.Deallocate(AStreamID);
}
public void Prior()
{
CheckActive();
bool LEOF = FEOF;
if (FDirection == ScanDirection.Forward)
{
if (FEOF)
{
FEOF = false;
}
else
{
FEntryNumber--;
}
if (((FEntryNumber < 0) || (FIndexNode.EntryCount == 0)) && !PriorNode())
{
FEntryNumber = 0;
FBOF = true;
}
// Make sure that the entry is >= FFirstKey
if (!FBOF && (FFirstKey != null) && (FAccessPath.Compare(FProcess, FIndexNode.Key(FEntryNumber), null, FFirstKey.Stream, FFirstKey.DataType) < 0))
{
First();
}
}
else
{
if (FEOF)
{
FEOF = false;
}
else
{
FEntryNumber++;
}
if ((FEntryNumber >= FIndexNode.EntryCount) && !NextNode())
{
FEntryNumber = FIndexNode.EntryCount - 1;
FEntryNumber = FEntryNumber < 0 ? 0 : FEntryNumber;
FBOF = true;
}
// Make sure that the entry is <= FFirstKey
if (!FBOF && (FFirstKey != null) && (FAccessPath.Compare(FProcess, FIndexNode.Key(FEntryNumber), null, FFirstKey.Stream, FFirstKey.DataType) > 0))
{
First();
}
}
// Make sure that if the scan is empty, the EOF flag is still true
if (LEOF && FBOF)
{
FEOF = true;
}
}
