int nghttp2_check_header_value(const uint8_t *value, size_t len) {
  const uint8_t *last;
  for (last = value + len; value != last; ++value) {
    if (!VALID_HD_VALUE_CHARS[*value]) {
      return 0;
    }
  }
  return 1;
}
int nghttp2_check_header_value(const uint8_t *value, size_t len) {
  const uint8_t *last;
  for (last = value + len; value != last; ++value) {
    if (!VALID_HD_VALUE_CHARS[*value]) {
      return 0;
    }
  }
  return 1;
}