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 nullptr;} 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
