Function hex_to_vec

src/parse/utils/string.h:123–137

    }

    std::vector<uint32_t> hex_to_vec(std::string hex_str, int num_char)
    {
      assert(hex_str.size()%num_char==0);

      std::vector<uint32_t> vec;
      for(int l=0; l<hex_str.size(); l+=num_char)
        {
          std::string hex = hex_str.substr(l, num_char);
          uint32_t    ind = hex_to_numb(hex);//std::stoul(hex, NULL, 16);

          vec.push_back(ind);
        }

      return vec;
    }

    std::string vec_to_utf8(std::vector<uint32_t>& vec)
    {