Utilities.cs

using System;
using System.Linq;

namespace TinkerWorX.Legeria.Shared
{
    public static class Utilities
    {
        public static readonly Random Random = new Random();

        public static Int32 Remainder(Int32 a, Int32 b)
        {
            return (a % b + b) % b;
        }

        public static void Swap<T>(ref T a, ref T b)
        {
            var t = a;
            a = b;
            b = t;
        }

        public static Int32 RandomFromCoords(Int32 x, Int32 y, Int32 minValue, Int32 maxValue)
        {
            return (new Random((51 + x) * 51 + y)).Next(minValue, maxValue);
        }

        /*
        public static Int32 RandomFromCoords(Int32 x, Int32 y, Int32 minValue, Int32 maxValue)
        {
            // Random Number Generator voodoo found at:
            // http://en.wikipedia.org/wiki/Random_number_generation#Computational_methods
            var z = 36969 * (x & 65535) + (x >> 16);
            var w = 18000 * (y & 65535) + (y >> 16);
            var dn = ((z << 16) + w) / (Double)Int32.MaxValue;
            return (Int32)(Math.Floor(dn * (maxValue - minValue)) + minValue);
        }
         */

        public static String MD5(String input)
        {
            return MD5Core.GetHash(input).Aggregate(String.Empty, (current, character) => current + character.ToString("x2"));
        }
    }
}