Oops, forgot to add this file

BizHawk.Common/Extensions/NumberExtensions.cs

@@ -0,0 +1,66 @@
+using System.Linq;
+
+namespace BizHawk.Common.NumberExtensions
+{
+	public static class NumberExtensions
+	{
+		public static string ToHexString(this int n, int numdigits)
+		{
+			return string.Format("{0:X" + numdigits + "}", n);
+		}
+
+		public static string ToHexString(this uint n, int numdigits)
+		{
+			return string.Format("{0:X" + numdigits + "}", n);
+		}
+
+		public static string ToHexString(this byte n, int numdigits)
+		{
+			return string.Format("{0:X" + numdigits + "}", n);
+		}
+
+		public static string ToHexString(this ushort n, int numdigits)
+		{
+			return string.Format("{0:X" + numdigits + "}", n);
+		}
+
+		public static bool Bit(this int b, int index)
+		{
+			return (b & (1 << index)) != 0;
+		}
+
+		public static bool Bit(this ushort b, int index)
+		{
+			return (b & (1 << index)) != 0;
+		}
+
+		public static bool In(this int i, params int[] options)
+		{
+			return options.Any(j => i == j);
+		}
+
+		/// <summary>
+		/// Receives a number and returns the number of hexadecimal digits it is
+		/// Note: currently only returns 2, 4, 6, or 8
+		/// </summary>
+		public static int NumHexDigits(this int i)
+		{
+			if (i < 0x100)
+			{
+				return 2;
+			}
+
+			if (i < 0x10000)
+			{
+				return 4;
+			}
+
+			if (i < 0x1000000)
+			{
+				return 6;
+			}
+
+			return 8;
+		}
+	}
+}