fixed

#include <cstring>

template<typename T = size_t>

T Hex2Int(const char* const hexstr, bool* overflow=nullptr)

{

    if (!hexstr)

        return false;

    if (overflow)

        *overflow = false;

    auto between = [](char val, char c1, char c2) { return val >= c1 && val <= c2; };

    size_t len = strlen(hexstr);

    T result = 0;

    for (size_t i = 0, offset = sizeof(T) << 3; i < len && (int)offset > 0; i++)

    {

        if (between(hexstr[i], '0', '9'))

            result = result << 4 ^ (hexstr[i] - '0');

        else if (between(tolower(hexstr[i]), 'a', 'f'))

            result = result << 4 ^ (tolower(hexstr[i]) - ('a' - 10)); // Remove the decimal part;

        offset -= 4;

    }

    if (((len + ((len % 2) != 0)) << 2) > (sizeof(T) << 3) && overflow)

        *overflow = true;

    return result;

}

int readchunk(const char* data, size_t datasize, size_t& pos) {

    int start = pos;

    char value[512];

    while ((pos < datasize) && data[pos] != '\r') { ++pos;  };

    while ((++pos < datasize) && data[pos] != '\r') {};

    int len = pos - start;

    pos+=2;

    if (len > 511) {

        libhttppp::HTTPException ee;

        ee[libhttppp::HTTPException::Error] << "nginxfiler: chunck size: " << len << " to big aborting !";

                    if ((chunklen = readchunk(data.get(), recv, cpos)) == 0) {

                        break;

                    }

                    std::cout << chunklen << std::endl;

                    readed = 0;

                }