InternalFlagsFormat() [1/2]

static string System.Enum.InternalFlagsFormat ( EnumInfo enumInfo, ulong resultValue )

inlinestaticprivate

Definition at line 177 of file Enum.cs.

    {
        string[] names = enumInfo.Names;
        ulong[] values = enumInfo.Values;
        if (resultValue == 0L)
        {
            if (values.Length == 0 || values[0] != 0L)
            {
                return "0";
            }
            return names[0];
        }
        Span<int> span = stackalloc int[64];
        int num;
        for (num = values.Length - 1; num >= 0; num--)
        {
            if (values[num] == resultValue)
            {
                return names[num];
            }
            if (values[num] < resultValue)
            {
                break;
            }
        }
        int num2 = 0;
        int num3 = 0;
        while (num >= 0)
        {
            ulong num4 = values[num];
            if (num == 0 && num4 == 0L)
            {
                break;
            }
            if ((resultValue & num4) == num4)
            {
                resultValue -= num4;
                span[num3++] = num;
                num2 = checked(num2 + names[num].Length);
            }
            num--;
        }
        if (resultValue != 0L)
        {
            return null;
        }
        string text = string.FastAllocateString(checked(num2 + 2 * (num3 - 1)));
        Span<char> destination = new Span<char>(ref text.GetRawStringData(), text.Length);
        string text2 = names[span[--num3]];
        text2.CopyTo(destination);
        destination = destination.Slice(text2.Length);
        while (--num3 >= 0)
        {
            destination[0] = ',';
            destination[1] = ' ';
            destination = destination.Slice(2);
            text2 = names[span[num3]];
            text2.CopyTo(destination);
            destination = destination.Slice(text2.Length);
        }
        return text;
    }

References System.destination, System.L, System.Enum.EnumInfo.Names, System.text, System.Enum.EnumInfo.Values, and System.values.