public void CreateOrUpdate(CreateOrUpdateCtx ctx)
{
var index = Find(ctx.KeyPrefix, ctx.Key);
ctx.Stack.Add(new NodeIdxPair { Node = this, Idx = index });
ctx.Depth++;
_children[index].CreateOrUpdate(ctx);
ctx.Depth--;
var newBranch = this;
if (ctx.Split)
{
ctx.Split = false;
var newKeys = new byte[_children.Length][];
var newChildren = new IBTreeNode[_children.Length + 1];
var newPairCounts = new long[_children.Length + 1];
Array.Copy(_keys, 0, newKeys, 0, index);
newKeys[index] = ctx.Node2.GetLeftMostKey();
Array.Copy(_keys, index, newKeys, index + 1, _keys.Length - index);
Array.Copy(_children, 0, newChildren, 0, index);
newChildren[index] = ctx.Node1;
newChildren[index + 1] = ctx.Node2;
Array.Copy(_children, index + 1, newChildren, index + 2, _children.Length - index - 1);
Array.Copy(_pairCounts, newPairCounts, index);
var previousPairCount = index > 0 ? newPairCounts[index - 1] : 0;
for (var i = index; i < newPairCounts.Length; i++)
{
previousPairCount += newChildren[i].CalcKeyCount();
newPairCounts[i] = previousPairCount;
}
ctx.Node1 = null;
ctx.Node2 = null;
if (_children.Length < MaxChildren)
{
if (TransactionId != ctx.TransactionId)
{
newBranch = new BTreeBranch(ctx.TransactionId, newKeys, newChildren, newPairCounts);
ctx.Node1 = newBranch;
ctx.Update = true;
}
else
{
_keys = newKeys;
_children = newChildren;
_pairCounts = newPairCounts;
}
if (ctx.SplitInRight) index++;
ctx.Stack[ctx.Depth] = new NodeIdxPair { Node = newBranch, Idx = index };
return;
}
if (ctx.SplitInRight) index++;
ctx.Split = true;
var keyCountLeft = (newChildren.Length + 1) / 2;
var keyCountRight = newChildren.Length - keyCountLeft;
var splitKeys = new byte[keyCountLeft - 1][];
var splitChildren = new IBTreeNode[keyCountLeft];
var splitPairCounts = new long[keyCountLeft];
Array.Copy(newKeys, splitKeys, splitKeys.Length);
Array.Copy(newChildren, splitChildren, splitChildren.Length);
Array.Copy(newPairCounts, splitPairCounts, splitPairCounts.Length);
ctx.Node1 = new BTreeBranch(ctx.TransactionId, splitKeys, splitChildren, splitPairCounts);
splitKeys = new byte[keyCountRight - 1][];
splitChildren = new IBTreeNode[keyCountRight];
splitPairCounts = new long[keyCountRight];
Array.Copy(newKeys, keyCountLeft, splitKeys, 0, splitKeys.Length);
Array.Copy(newChildren, keyCountLeft, splitChildren, 0, splitChildren.Length);
for (int i = 0; i < splitPairCounts.Length; i++)
{
splitPairCounts[i] = newPairCounts[keyCountLeft + i] - newPairCounts[keyCountLeft - 1];
}
ctx.Node2 = new BTreeBranch(ctx.TransactionId, splitKeys, splitChildren, splitPairCounts);
if (index < keyCountLeft)
{
ctx.Stack[ctx.Depth] = new NodeIdxPair { Node = ctx.Node1, Idx = index };
ctx.SplitInRight = false;
}
else
{
ctx.Stack[ctx.Depth] = new NodeIdxPair { Node = ctx.Node2, Idx = index - keyCountLeft };
ctx.SplitInRight = true;
}
return;
}
if (ctx.Update)
{
if (TransactionId != ctx.TransactionId)
{
var newKeys = new byte[_keys.Length][];
var newChildren = new IBTreeNode[_children.Length];
var newPairCounts = new long[_children.Length];
Array.Copy(_keys, newKeys, _keys.Length);
Array.Copy(_children, newChildren, _children.Length);
newChildren[index] = ctx.Node1;
Array.Copy(_pairCounts, newPairCounts, _pairCounts.Length);
newBranch = new BTreeBranch(ctx.TransactionId, newKeys, newChildren, newPairCounts);
ctx.Node1 = newBranch;
}
else
{
_children[index] = ctx.Node1;
ctx.Update = false;
ctx.Node1 = null;
}
ctx.Stack[ctx.Depth] = new NodeIdxPair { Node = newBranch, Idx = index };
}
Debug.Assert(newBranch.TransactionId == ctx.TransactionId);
if (!ctx.Created) return;
var pairCounts = newBranch._pairCounts;
for (var i = index; i < pairCounts.Length; i++)
{
pairCounts[i]++;
}
}
public void CreateOrUpdate(CreateOrUpdateCtx ctx)
{
var index = Find(ctx.KeyPrefix, ctx.Key);
ctx.Stack.Add(new NodeIdxPair {
Node = this, Idx = index
});
ctx.Depth++;
_children[index].CreateOrUpdate(ctx);
ctx.Depth--;
var newBranch = this;
if (ctx.Split)
{
ctx.Split = false;
var newKeys = new byte[_children.Length][];
var newChildren = new IBTreeNode[_children.Length + 1];
var newPairCounts = new long[_children.Length + 1];
Array.Copy(_keys, 0, newKeys, 0, index);
newKeys[index] = ctx.Node2.GetLeftMostKey();
Array.Copy(_keys, index, newKeys, index + 1, _keys.Length - index);
Array.Copy(_children, 0, newChildren, 0, index);
newChildren[index] = ctx.Node1;
newChildren[index + 1] = ctx.Node2;
Array.Copy(_children, index + 1, newChildren, index + 2, _children.Length - index - 1);
Array.Copy(_pairCounts, newPairCounts, index);
var previousPairCount = index > 0 ? newPairCounts[index - 1] : 0;
for (var i = index; i < newPairCounts.Length; i++)
{
previousPairCount += newChildren[i].CalcKeyCount();
newPairCounts[i] = previousPairCount;
}
ctx.Node1 = null;
ctx.Node2 = null;
if (_children.Length < MaxChildren)
{
if (TransactionId != ctx.TransactionId)
{
newBranch = new BTreeBranch(ctx.TransactionId, newKeys, newChildren, newPairCounts);
ctx.Node1 = newBranch;
ctx.Update = true;
}
else
{
_keys = newKeys;
_children = newChildren;
_pairCounts = newPairCounts;
}
if (ctx.SplitInRight)
{
index++;
}
ctx.Stack[ctx.Depth] = new NodeIdxPair {
Node = newBranch, Idx = index
};
return;
}
if (ctx.SplitInRight)
{
index++;
}
ctx.Split = true;
var keyCountLeft = (newChildren.Length + 1) / 2;
var keyCountRight = newChildren.Length - keyCountLeft;
var splitKeys = new byte[keyCountLeft - 1][];
var splitChildren = new IBTreeNode[keyCountLeft];
var splitPairCounts = new long[keyCountLeft];
Array.Copy(newKeys, splitKeys, splitKeys.Length);
Array.Copy(newChildren, splitChildren, splitChildren.Length);
Array.Copy(newPairCounts, splitPairCounts, splitPairCounts.Length);
ctx.Node1 = new BTreeBranch(ctx.TransactionId, splitKeys, splitChildren, splitPairCounts);
splitKeys = new byte[keyCountRight - 1][];
splitChildren = new IBTreeNode[keyCountRight];
splitPairCounts = new long[keyCountRight];
Array.Copy(newKeys, keyCountLeft, splitKeys, 0, splitKeys.Length);
Array.Copy(newChildren, keyCountLeft, splitChildren, 0, splitChildren.Length);
for (int i = 0; i < splitPairCounts.Length; i++)
{
splitPairCounts[i] = newPairCounts[keyCountLeft + i] - newPairCounts[keyCountLeft - 1];
}
ctx.Node2 = new BTreeBranch(ctx.TransactionId, splitKeys, splitChildren, splitPairCounts);
if (index < keyCountLeft)
{
ctx.Stack[ctx.Depth] = new NodeIdxPair {
Node = ctx.Node1, Idx = index
};
ctx.SplitInRight = false;
}
else
{
ctx.Stack[ctx.Depth] = new NodeIdxPair {
Node = ctx.Node2, Idx = index - keyCountLeft
};
ctx.SplitInRight = true;
}
return;
}
if (ctx.Update)
{
if (TransactionId != ctx.TransactionId)
{
var newKeys = new byte[_keys.Length][];
var newChildren = new IBTreeNode[_children.Length];
var newPairCounts = new long[_children.Length];
Array.Copy(_keys, newKeys, _keys.Length);
Array.Copy(_children, newChildren, _children.Length);
newChildren[index] = ctx.Node1;
Array.Copy(_pairCounts, newPairCounts, _pairCounts.Length);
newBranch = new BTreeBranch(ctx.TransactionId, newKeys, newChildren, newPairCounts);
ctx.Node1 = newBranch;
}
else
{
_children[index] = ctx.Node1;
ctx.Update = false;
ctx.Node1 = null;
}
ctx.Stack[ctx.Depth] = new NodeIdxPair {
Node = newBranch, Idx = index
};
}
Debug.Assert(newBranch.TransactionId == ctx.TransactionId);
if (!ctx.Created)
{
return;
}
var pairCounts = newBranch._pairCounts;
for (var i = index; i < pairCounts.Length; i++)
{
pairCounts[i]++;
}
}