dir_reader_fallback.h revision 5821806d5e7f356e8fa4b058a389a808ea183019 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef BASE_FILES_DIR_READER_FALLBACK_H_
6#define BASE_FILES_DIR_READER_FALLBACK_H_
7
8namespace base {
9
10class DirReaderFallback {
11 public:
12  // Open a directory. If |IsValid| is true, then |Next| can be called to start
13  // the iteration at the beginning of the directory.
14  explicit DirReaderFallback(const char* directory_path) {}
15
16  // After construction, IsValid returns true iff the directory was
17  // successfully opened.
18  bool IsValid() const { return false; }
19
20  // Move to the next entry returning false if the iteration is complete.
21  bool Next() { return false; }
22
23  // Return the name of the current directory entry.
24  const char* name() { return 0;}
25
26  // Return the file descriptor which is being used.
27  int fd() const { return -1; }
28
29  // Returns true if this is a no-op fallback class (for testing).
30  static bool IsFallback() { return true; }
31};
32
33}  // namespace base
34
35#endif  // BASE_FILES_DIR_READER_FALLBACK_H_
36