Cosmos/source/Cosmos.System.Plugs/System/UInt64Impl.cs

using System;

using Cosmos.IL2CPU.Plugs;

namespace Cosmos.System.Plugs.System
{
    [Plug(Target = typeof(UInt64))]
    public class UInt64Impl
    {
        public static string ToString(ref ulong aThis)
        {
            return UInt64Impl2.GetNumberString(aThis, false);
        }
    }

    // See note in UInt32Impl
    public class UInt64Impl2
    {
        public static string GetNumberString(ulong aValue, bool aIsNegative)
        {
            const string xDigits = "0123456789";
            char[] xResultChars = new char[21];
            int xCurrentPos = 20;
            if (aValue > 0)
            {
                while (aValue > 0)
                {
                    byte xPos = (byte)(aValue % 10);
                    aValue /= 10;
                    xResultChars[xCurrentPos] = xDigits[xPos];
                    xCurrentPos -= 1;
                }
            }
            else {
                xResultChars[xCurrentPos] = '0';
                xCurrentPos -= 1;
            }
            if (aIsNegative)
            {
                xResultChars[xCurrentPos] = '-';
                xCurrentPos -= 1;
            }
            return new String(xResultChars, xCurrentPos + 1, 20 - xCurrentPos);
        }
    }
}