Microsoft.JScript.QuickSort.Compare C# (CSharp) Method

      private int Compare(Object x, Object y){
        if (x == null || x is Missing)
          if (y == null || y is Missing)
            return 0;
          else 
            return 1;
        else if (y == null || y is Missing)
          return -1;
        if (this.compareFn != null){
          double result = Convert.ToNumber(this.compareFn.Call(new Object[]{x, y}, null));
          if (result != result)
            throw new JScriptException(JSError.NumberExpected);
          return (int)Runtime.DoubleToInt64(result);
        }else
          return String.CompareOrdinal(Convert.ToString(x), Convert.ToString(y));
      }