Method validateHex

KittyMemoryEx/KittyUtils.cpp:258–304

                return false;
            }

            digitCount++;
        }

        return (digitCount > 0 && (digitCount % 2 == 0));
    }

    bool String::validateHex(std::string &hex)
    {
        if (hex.empty())
            return false;

        size_t len = hex.length();
        size_t startOffset = (len >= 2 && hex[0] == '0' && (hex[1] == 'x' || hex[1] == 'X')) ? 2 : 0;

        size_t actualByteCount = 0;
        bool needsCleaning = (startOffset > 0);

        for (size_t i = startOffset; i < len; ++i)
        {
            unsigned char c = static_cast<unsigned char>(hex[i]);

            if (::isspace(c))
            {
                needsCleaning = true;
                continue;
            }

            if (!::isxdigit(c))
                return false;

            actualByteCount++;
        }

        if (actualByteCount == 0 || (actualByteCount % 2 != 0))
            return false;

        if (needsCleaning)
        {
            std::string cleaned;
            cleaned.reserve(actualByteCount);
            for (size_t i = startOffset; i < len; ++i)
            {
                unsigned char c = static_cast<unsigned char>(hex[i]);
                if (!::isspace(c))
                {
                    cleaned.push_back(c);
                }
            }
            hex = std::move(cleaned);