using System;
using System.Runtime.InteropServices;

using BizHawk.Emulation.Common;

namespace BizHawk.Emulation.Cores.Atari.Lynx
{
	public partial class Lynx : ISaveRam
	{
		public byte[] CloneSaveRam()
		{
			int size;
			IntPtr data;
			if (!LibLynx.GetSaveRamPtr(Core, out size, out data))
			{
				return null;
			}

			byte[] ret = new byte[size];
			Marshal.Copy(data, ret, 0, size);
			return ret;
		}

		public void StoreSaveRam(byte[] srcdata)
		{
			int size;
			IntPtr data;
			if (!LibLynx.GetSaveRamPtr(Core, out size, out data))
			{
				throw new InvalidOperationException();
			}

			if (size != srcdata.Length)
			{
				throw new ArgumentOutOfRangeException();
			}

			Marshal.Copy(srcdata, 0, data, size);
		}

		public bool SaveRamModified
		{
			get
			{
				int unused;
				IntPtr unused2;
				return LibLynx.GetSaveRamPtr(Core, out unused, out unused2);
			}
		}
	}
}