dir_reader_fallback.h revision c407dc5cd9bdc5668497f21b26b09d988ab439de 
1// Copyright (c) 2010 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_DIR_READER_FALLBACK_H_
6#define BASE_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  // After construction, IsValid returns true iff the directory was
16  // successfully opened.
17  bool IsValid() const { return false; }
18  // Move to the next entry returning false if the iteration is complete.
19  bool Next() { return false; }
20  // Return the name of the current directory entry.
21  const char* name() { return 0;}
22  // Return the file descriptor which is being used.
23  int fd() const { return -1; }
24  // Returns true if this is a no-op fallback class (for testing).
25  static bool IsFallback() { return true; }
26};
27
28}  // namespace base
29
30#endif  // BASE_DIR_READER_FALLBACK_H_
31