UTF-8 util

utf8_util.hpp

bool starts_with_utf8bom(std::string_view s)
{
  constexpr char utf8_bom[3] = { 0xEF, 0xBB, 0xBF };
  return s.length() >= 3 && std::equal(utf8_bom, utf8_bom + 3, s.begin());
}

std::string& erase_utf8bom(std::string& text)
{
  if (starts_with_utf8bom(text)) {
    text.erase(0, 3);
  }
  return text;
}