public static bool TryRead(Stream stream, out HFSTreeNodeDescriptor?descriptor)
{
descriptor = null;
uint fLink = ReadUInt32(stream);
uint bLink = ReadUInt32(stream);
sbyte rawKind = (sbyte)ReadUInt8(stream);
if (!Enum.IsDefined(typeof(HFSTreeNodeKind), rawKind))
{
return(false);
}
var kind = (HFSTreeNodeKind)rawKind;
byte height = ReadUInt8(stream);
if (((kind == HFSTreeNodeKind.Header) || (kind == HFSTreeNodeKind.Map)) && (height != 0))
{
return(false);
}
if ((kind == HFSTreeNodeKind.Leaf) && (height != 1))
{
return(false);
}
ushort numRecords = ReadUInt16(stream);
_ = ReadUInt16(stream); // reserved
descriptor = new HFSTreeNodeDescriptor(fLink, bLink, kind, height, numRecords);
return(true);
}
private static (HFSHeaderTreeNode, IReadOnlyList <HFSTreeNode>) ReadTree(Stream stream, bool isHFSX)
{
if (!HFSTreeNodeDescriptor.TryRead(stream, out var headerDesc))
{
throw new InvalidFormatException(CorruptHFSMessage);
}
var header = HFSHeaderTreeNode.Read(headerDesc !, stream);
var nodes = new HFSTreeNode[header.HeaderRecord.TotalNodes];
nodes[0] = header;
for (int i = 1; i < nodes.Length; i++)
{
if (!HFSTreeNode.TryRead(stream, header.HeaderRecord, isHFSX, out var node))
{
throw new InvalidFormatException(CorruptHFSMessage);
}
nodes[i] = node !;
}
return(header, nodes);
}
protected HFSTreeNode(HFSTreeNodeDescriptor descriptor) => Descriptor = descriptor;
