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 // Copyright (c) 2010 The Chromium Authors. All rights reserved.

 // Use of this source code is governed by a BSD-style license that can be

 // found in the LICENSE file.

 #ifndef BASE_DIR_READER_FALLBACK_H_

 #define BASE_DIR_READER_FALLBACK_H_

 #pragma once

 namespace base {

 class DirReaderFallback {

  public:

   // Open a directory. If |IsValid| is true, then |Next| can be called to start

   // the iteration at the beginning of the directory.

   explicit DirReaderFallback(const char* directory_path) { }

   // After construction, IsValid returns true iff the directory was

   // successfully opened.

   bool IsValid() const { return false; }

   // Move to the next entry returning false if the iteration is complete.

   bool Next() { return false; }

   // Return the name of the current directory entry.

   const char* name() { return 0;}

   // Return the file descriptor which is being used.

   int fd() const { return -1; }

   // Returns true if this is a no-op fallback class (for testing).

   static bool IsFallback() { return true; }

 };

 }  // namespace base

 #endif  // BASE_DIR_READER_FALLBACK_H_