Function hatoui

src/univalue/lib/univalue_read.cpp:25–49

convert hexadecimal string to unsigned integer

// convert hexadecimal string to unsigned integer
static const char *hatoui(const char *first, const char *last,
                          unsigned int& out)
{
    unsigned int result = 0;
    for (; first != last; ++first)
    {
        int digit;
        if (json_isdigit(*first))
            digit = *first - '0';

        else if (*first >= 'a' && *first <= 'f')
            digit = *first - 'a' + 10;

        else if (*first >= 'A' && *first <= 'F')
            digit = *first - 'A' + 10;

        else
            break;

        result = 16 * result + digit;
    }
    out = result;

    return first;
}

enum jtokentype getJsonToken(std::string& tokenVal, unsigned int& consumed,
                            const char *raw, const char *end)