Function hex

include/tsutil/StringConvert.h:40–61

* Convert input string into a hex string * * Each character in input is interpreted as an unsigned char and represented as a two-digit hex value [0-255] in the returned * string. * * @param input Input string view * @return The hex representation of the input string * * @note this is a specialization of boost::algorithms::hex */

 * @note this is a specialization of boost::algorithms::hex
 */
inline std::string
hex(const std::string_view input)
{
  std::string result;

  result.resize(input.size() * 2);

  char *p   = result.data();
  char *end = p + result.size();
  for (unsigned char x : input) {
    if (x < 0x10) {
      *p++ = '0';
    }
    if (auto [ptr, err] = std::to_chars(p, end, x, 16); err == std::errc()) {
      p = ptr;
    } else {
      throw std::runtime_error(std::make_error_code(err).message().c_str());
    }
  }

  return result;
}

/**
 * Convert input hex string into a string