michael@0: // Copyright (c) 2010 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: #ifndef BASE_DIR_READER_FALLBACK_H_
michael@0: #define BASE_DIR_READER_FALLBACK_H_
michael@0: #pragma once
michael@0: 
michael@0: namespace base {
michael@0: 
michael@0: class DirReaderFallback {
michael@0:  public:
michael@0:   // Open a directory. If |IsValid| is true, then |Next| can be called to start
michael@0:   // the iteration at the beginning of the directory.
michael@0:   explicit DirReaderFallback(const char* directory_path) { }
michael@0:   // After construction, IsValid returns true iff the directory was
michael@0:   // successfully opened.
michael@0:   bool IsValid() const { return false; }
michael@0:   // Move to the next entry returning false if the iteration is complete.
michael@0:   bool Next() { return false; }
michael@0:   // Return the name of the current directory entry.
michael@0:   const char* name() { return 0;}
michael@0:   // Return the file descriptor which is being used.
michael@0:   int fd() const { return -1; }
michael@0:   // Returns true if this is a no-op fallback class (for testing).
michael@0:   static bool IsFallback() { return true; }
michael@0: };
michael@0: 
michael@0: }  // namespace base
michael@0: 
michael@0: #endif  // BASE_DIR_READER_FALLBACK_H_