base/files/dir_reader_fallback.h

   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
   8 namespace base {
   9
  10 class 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_