Function ListDirInternal

cpp/src/arrow/util/io_util.cc:710–740

}

Result<std::vector<WIN32_FIND_DATAW>> ListDirInternal(const PlatformFilename& dir_path) {
  WIN32_FIND_DATAW find_data;
  std::wstring pattern = PathWithoutTrailingSlash(dir_path) + L"\\*.*";
  HANDLE handle = FindFirstFileW(pattern.c_str(), &find_data);
  if (handle == INVALID_HANDLE_VALUE) {
    return IOErrorFromWinError(GetLastError(), "Cannot list directory '",
                               dir_path.ToString(), "'");
  }

  std::unique_ptr<HANDLE, decltype(&FindHandleDeleter)> handle_guard(&handle,
                                                                     FindHandleDeleter);

  std::vector<WIN32_FIND_DATAW> results;
  do {
    // Skip "." and ".."
    if (find_data.cFileName[0] == L'.') {
      if (find_data.cFileName[1] == L'\0' ||
          (find_data.cFileName[1] == L'.' && find_data.cFileName[2] == L'\0')) {
        continue;
      }
    }
    results.push_back(find_data);
  } while (FindNextFileW(handle, &find_data));

  int errnum = GetLastError();
  if (errnum != ERROR_NO_MORE_FILES) {
    return IOErrorFromWinError(GetLastError(), "Cannot list directory '",
                               dir_path.ToString(), "'");
  }
  return results;
}

Status FindOneFile(const PlatformFilename& fn, WIN32_FIND_DATAW* find_data,
                   bool* exists = nullptr) {