Misc.cs

using System.IO;

public static class Misc
{
	/// <summary>
	///  Calculates the checksum on a v0.90 MD superblock.
	///  Don't ask me why I needed it.
	/// </summary>
	/// <param name="filename">
	///  The filename of the superblock.
	/// </param>
	/// <returns>
	///  The checksum.
	/// </returns>
	public static uint CalculateMDSum(string filename)
	{
		ulong newcsum = 0;

		using (var reader = new BinaryReader(File.OpenRead(filename)))
		{
			for (int i = 0; i < (4096 / 4); i++)
			{
				if (i != 38)
					newcsum += reader.ReadUInt32();
				else
					reader.BaseStream.Seek(4, SeekOrigin.Current);

			}
		}

		return (uint)((newcsum & 0xffffffff) + (newcsum >> 32));
	}
}