public BTree(int t, long root, Func <IFile, IFile, int> comparer, StreamManager manager)
{
this.t = t;
this.manager = manager;
this.comparer = comparer;
this.root = manager.DiskRead(root);
}
private void InsertNonFull(Node x, IFile k)
{
int index = x.n - 1;
if (x.leaf)
{
while (index >= 0 && comparer(k, x.key[index]) < 0)
{
x.key[index + 1] = x.key[index];
index--;
}
x.key[index + 1] = k;
x.n++;
manager.DiskWrite(x);
}
else
{
while (index >= 0 && comparer(k, x.key[index]) < 0)
{
index--;
}
index++;
Node child = manager.DiskRead(x.c[index]);
if (child.n == 2 * t - 1)
{
SplitChild(child, x, index);
if (comparer(k, x.key[index]) >= 0)
{
child = manager.DiskRead(x.c[index + 1]);
}
}
InsertNonFull(child, k);
}
}