Function string_to_lower

base/string.cpp:88–98

}

std::string string_to_lower(const std::string& original)
{
  std::wstring result(from_utf8(original));
  auto it(result.begin());
  auto end(result.end());
  while (it != end) {
    *it = std::tolower(*it);
    ++it;
  }
  return to_utf8(result);
}

std::string string_to_upper(const std::string& original)
{