Function utf8_is_cont

src/common/utf8.cpp:26–28

}

bool utf8_is_cont(char c) {
  return ((c & 0x80) == 0x80 && (c & 0x40) == 0); // 10xxxxx
}

char *utf8_dec(const char *string, const char *current) {
  if (string >= current)