public override IFFFile Load(Stream stream)
{
var tag = stream.ReadString(4);
if (!tag.Equals(FormTag))
{
throw new IOException("IFF File does not contain valid FORM data");
}
var size = stream.ReadInt32BE();
var type = Encoding.ASCII.GetString(stream.ReadBytes(4));
var root = new IFFFile.Node
{
NodeType = IFFFile.NodeType.Form,
Parent = null,
Type = type,
Size = size
};
LoadFormNode(stream, root);
return(new IFFFile
{
Root = root
});
}
public static IEnumerable <IFFFile.Node> Children(this IFFFile.Node node, string type = null)
{
foreach (var child in node.Children)
{
if (type == null || string.Equals(type, child.Type, StringComparison.InvariantCultureIgnoreCase))
{
yield return(child);
}
}
}
private void LoadFormNode(Stream stream, IFFFile.Node formNode)
{
var start = stream.Position;
var children = new List <IFFFile.Node>();
while (stream.Position < (start + formNode.Size - 4))
{
var tag = stream.ReadString(4);
var size = stream.ReadInt32BE();
//Console.WriteLine(tag + " " + size + " " + reader.BaseStream.Position);
IFFFile.Node child;
if (tag.Equals(FormTag))
{
var type = stream.ReadString(4);
child = new IFFFile.Node
{
NodeType = IFFFile.NodeType.Form,
Parent = formNode,
Type = type,
Size = size
};
LoadFormNode(stream, child);
}
else
{
child = new IFFFile.Node
{
NodeType = IFFFile.NodeType.Record,
Parent = formNode,
Type = tag,
Size = size,
Data = stream.ReadBytes(size)
};
}
children.Add(child);
}
formNode.Children = children.ToArray();
}
