public static (long offset, long length) SerializeTree(
VectorNode node, Stream indexStream, Stream vectorStream, Stream postingsStream, IStringModel tokenizer)
{
var stack = new Stack <VectorNode>();
var offset = indexStream.Position;
if (node.Vector.Count == 0)
{
node = node.Right;
}
while (node != null)
{
SerializePostings(node, postingsStream);
node.VectorOffset = tokenizer.SerializeVector(node.Vector, vectorStream);
SerializeNode(node, indexStream);
if (node.Right != null)
{
stack.Push(node.Right);
}
node = node.Left;
if (node == null && stack.Count > 0)
{
node = stack.Pop();
}
}
var length = indexStream.Position - offset;
return(offset, length);
}