public async Task <ListNode> DeepCopy(ListNode head)
{
Debug.Assert(head.Previous == null, "Head node should be passed to this method.");
var nodePacker = new ListNodePacker();
var cloningTasks = GetAllNodes(head)
.Select(node => nodePacker.ToPackedListNode(node))
.Select(node => nodePacker.RestoreNodeAsync(node));
var clonedNodes = await Task.WhenAll(cloningTasks);
return(clonedNodes[0]);
}
public async Task <ListNode> Deserialize(Stream s)
{
var buffer = await ReadBufferFromStream(s);
var nodePacker = new ListNodePacker();
var nodesTasks = ReadPackedNodesFromBuffer(nodePacker, buffer)
.Select(node => nodePacker.RestoreNodeAsync(node));
var nodes = await Task.WhenAll(nodesTasks);
return(nodes[0]);
}
private static IEnumerable <PackedListNode> ReadPackedNodesFromBuffer(ListNodePacker packer, byte[] buffer)
{
var initialOffset = 0;
while (initialOffset < buffer.Length)
{
var packedNode = packer.FromBuffer(buffer, initialOffset);
yield return(packedNode);
initialOffset += packedNode.ByteSize;
}
}
public async Task Serialize(ListNode head, Stream s)
{
Debug.Assert(head.Previous == null, "Head node should be passed to this method.");
var nodePacker = new ListNodePacker();
var tasks = GetAllNodes(head)
.Select(nodePacker.ToBytesAsync);
var conversionTask = await Task.WhenAll(tasks);
var bytes = ByteArrayHelper.Combine(conversionTask);
s.Write(bytes);
s.Position = 0;
}