LibZNI/NBT/API/NbtUUID.cs

using System;
using LibAC.Utilities;

namespace LibAC.NBT.API
{
    public class NbtUUID
    {
        public long MSB { get; }
        public long LSB { get; }

        public static readonly NbtUUID ZERO = new NbtUUID(UUID.ZERO);

        public NbtUUID(long msb, long lsb)
        {
            MSB = msb;
            LSB = lsb;
        }

        public NbtUUID(UUID uuid)
        {
            byte[] uuidBytes = uuid.GetBytes();
            MSB = BitConverter.ToInt64(uuidBytes, 0);
            LSB = BitConverter.ToInt64(uuidBytes, 8);
        }

        public long GetMostSignificantBits() => MSB;

        public long GetLeastSignificantBits() => LSB;

        public UUID ToUUID()
        {
            byte[] bytes = new byte[16];
            BitConverter.GetBytes(MSB).CopyTo(bytes, 0);
            BitConverter.GetBytes(LSB).CopyTo(bytes, 8);
            return new UUID(bytes);
        }

        public override string ToString()
        {
            return ToUUID().ToString();
        }
    }
}