System.Xml.XmlConverter.TryParseInt32 C# (CSharp) Méthode

        private static bool TryParseInt32(byte[] chars, int offset, int count, out int result)
        {
            result = 0;
            if (count == 0)
                return false;
            int value = 0;
            int offsetMax = offset + count;
            if (chars[offset] == '-')
            {
                if (count == 1)
                    return false;
                for (int i = offset + 1; i < offsetMax; i++)
                {
                    int digit = (chars[i] - '0');
                    if ((uint)digit > 9)
                        return false;
                    if (value < int.MinValue / 10)
                        return false;
                    value *= 10;
                    if (value < int.MinValue + digit)
                        return false;
                    value -= digit;
                }
            }
            else
            {
                for (int i = offset; i < offsetMax; i++)
                {
                    int digit = (chars[i] - '0');
                    if ((uint)digit > 9)
                        return false;
                    if (value > int.MaxValue / 10)
                        return false;
                    value *= 10;
                    if (value > int.MaxValue - digit)
                        return false;
                    value += digit;
                }
            }
            result = value;
            return true;
        }