Function IsStringUTF8

src/base/strings/string_util.cc:519–531

#endif

bool IsStringUTF8(const StringPiece& str) {
  const char *src = str.data();
  int32_t src_len = static_cast<int32_t>(str.length());
  int32_t char_index = 0;

  while (char_index < src_len) {
    int32_t code_point;
    CBU8_NEXT(src, char_index, src_len, code_point);
    if (!IsValidCharacter(code_point))
      return false;
  }
  return true;
}

// Implementation note: Normally this function will be called with a hardcoded
// constant for the lowercase_ascii parameter. Constructing a StringPiece from