public override void Deserialize(BinaryStream stream)
{
var ptr = (int)stream.Position;
var nD = DescriptorTag.Read(stream, ReferenceType.Offset);
if (nD.IsOffset)
{
stream.Position = nD.Value;
Deserialize(stream);
stream.Position = (ptr + nD.Size);
}
else
{
Offset = ptr;
var nChildren = nD.Value;
Children = new List <NodeClass>(nChildren);
var hash = stream.ReadInt32();
var size = stream.ReadInt16();
var name = StringHasher.ResolveHash(hash);
if (name != null)
{
Name = name;
}
else
{
Hash = hash;
}
var attrsPtr = (int)stream.Position;
var next = (attrsPtr + size);
if (size != 0)
{
var nhD = DescriptorTag.Read(stream, ReferenceType.Offset);
var adjustPtr = false;
if (nhD.IsOffset)
{
stream.Position = nhD.Value;
// read again
nhD = DescriptorTag.Read(stream, ReferenceType.Offset);
if (nhD.IsOffset)
{
throw new InvalidOperationException("Cannot have nested offsets!");
}
// adjust ptr to attributes
attrsPtr += nhD.Size;
adjustPtr = true;
}
var nAttrs = nhD.Value;
Attributes = new List <NodeAttribute>(nAttrs);
for (int i = 0; i < nAttrs; i++)
{
var attr = new NodeAttribute(stream, Name);
Attributes.Add(attr);
}
// move to the attributes if needed
if (adjustPtr)
{
stream.Position = attrsPtr;
}
// deserialize attribute data
foreach (var attr in Attributes)
{
attr.Deserialize(stream);
}
}
else
{
throw new NotImplementedException("Zero-length nodes are not covered under TrumpCare™.");
}
if (stream.Position != next)
{
throw new InvalidOperationException("You dun f****d up, son!");
}
// read children
for (int n = 0; n < nChildren; n++)
{
var child = new NodeClass(stream);
Children.Add(child);
}
}
}
public NodeClass(BinaryStream stream)
{
Deserialize(stream);
}
public override void Serialize(BinaryStream stream)
{
Offset = (int)stream.Position;
var nChildren = Children.Count;
var nAttributes = Attributes.Count;
var writeData = true;
if (Size > 16)
{
if (WriteCache.IsCached(this))
{
var cache = WriteCache.GetData(this);
var obj = cache.Object as NodeClass;
if ((obj != null) && obj.Equals(this))
{
Debug.WriteLine($">> [Class:{Offset:X8}] Instance cached @ {cache.Offset:X8} with key {cache.Checksum:X8}");
var nD = DescriptorTag.CreateReference(cache.Offset, ReferenceType.Offset);
nD.WriteTo(stream);
writeData = false;
}
else
{
Debug.WriteLine($">> [Class:{Offset:X8}] !!! FALSE POSITIVE !!!");
}
}
else
{
Debug.WriteLine($">> [Class:{Offset:X8}] Caching new instance with key {GetHashCode():X8}");
WriteCache.Cache(Offset, this);
}
}
if (writeData)
{
var nD = DescriptorTag.Create(nChildren);
nD.WriteTo(stream);
stream.Write(Hash);
// skip size parameter for now
stream.Position += 2;
var attrsPtr = stream.Position;
if (nAttributes > 0)
{
WriteAttributeHashes(stream);
// write attribute data
foreach (var attribute in Attributes)
{
attribute.Serialize(stream);
}
}
else
{
// no attributes to write!
stream.WriteByte(0);
}
var childrenPtr = stream.Position;
var attrsSize = (int)(childrenPtr - attrsPtr);
if (attrsSize > 65535)
{
throw new InvalidOperationException("Attribute data too large.");
}
// write attributes size
stream.Position = (attrsPtr - 2);
stream.Write((short)attrsSize);
// now write the children out
stream.Position = childrenPtr;
foreach (var child in Children)
{
child.Serialize(stream);
}
}
}
