irr::core::stringw getStringw(std::string str)
{
  size_t size = str.size();
  wchar_t *text = new wchar_t[size+sizeof(wchar_t)]; //s.size() doesn't include NULL terminator
  const char *data = &str[0];

  mbsrtowcs(text, &data, size, NULL);

  text[size] = L'\\0';
  return text;
}

std::string getStringSTL(irr::core::stringw str)
{
  std::string text = stringc(str.c_str()).c_str();
  return text;
}