/// <summary>
/// Returns a new tag from the given data buffer.
/// </summary>
/// <param name="buffer">An array of unsigned bytes containing the tag data.</param>
/// <param name="index">The index of the starting position in buffer that contains the tag data.</param>
/// <param name="count">The number of bytes to use from the buffer that are allocated to the tag data.</param>
/// <returns>Returns a new tag from the given data buffer.</returns>
public static Tag FromBuffer(byte[] buffer, int index, int count)
{
using (MemoryStream ms = new MemoryStream(buffer, index, count))
{
BinaryReader reader = new BinaryReader(ms);
byte id = reader.ReadByte();
TagType type = TagType.GetTagTypeById(id);
string name = reader.ReadString().Shift(-32);
int length;
if (type.Length < 0)
{
length = reader.ReadInt32();
}
else
{
length = type.Length;
}
byte[] value = reader.ReadBytes(length);
return(new Tag(name, type, type.ConvertToValue(value)));
}
}
private void LoadCompound(BinaryReader reader, TagCompound compound)
{
while (true)
{
byte id = reader.ReadByte();
if (id == TagType.TagEnd.Identifier)
{
break;
}
else
{
string name = reader.ReadString();
name = name.Shift(-32);
if (id == TagType.TagCompound.Identifier)
{
TagCompound tag = new TagCompound(name);
compound.AddCompound(tag);
LoadCompound(reader, tag);
}
else if (id == TagType.TagList.Identifier)
{
int count = reader.ReadInt32();
byte listId = reader.ReadByte();
TagType listType = TagType.GetTagTypeById(listId);
Type genericClass = typeof(TagList<>);
Type constructedClass = genericClass.MakeGenericType(listType.DataType);
dynamic tag = Activator.CreateInstance(constructedClass, name);
tag.ListType = TagType.GetTagTypeById(listId);
for (int i = 0; i < count; i++)
{
if (tag.ListType == TagType.TagCompound)
{
TagCompound c = new TagCompound(null);
LoadCompound(reader, c);
tag.Add(c);
}
else
{
int length = tag.ListType.Length >= 0 ? tag.ListType.Length : reader.ReadInt32();
byte[] data = reader.ReadBytes(length);
tag.Add(tag.ListType.ConvertToValue(data));
}
}
compound.AddTag(tag);
}
else
{
TagType type = TagType.GetTagTypeById(id);
int length = type.Length >= 0 ? type.Length : reader.ReadInt32();
byte[] data = reader.ReadBytes(length);
compound.AddTag(name, type, type.ConvertToValue(data));
}
}
}
}
