Mbed OS Reference | Dir.h Source File

 /* mbed Microcontroller Library
  * Copyright (c) 2015 ARM Limited
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 #ifndef DIR_H
 #define DIR_H
 
 #include "features/storage/filesystem/FileSystem.h"
 #include "platform/DirHandle.h"
 
 namespace mbed {
 /** \addtogroup filesystem */
 /** @{*/
 
 
 /** Dir class
  */
 class Dir : public DirHandle {
 public:
     /** Create an uninitialized directory
      *
      *  Must call open to initialize the directory on a file system
      */
     Dir();
 
     /** Open a directory on a filesystem
      *
      *  @param fs       Filesystem as target for a directory
      *  @param path     Name of the directory to open
      */
     Dir(FileSystem *fs, const char *path);
 
     /** Destroy a file
      *
      *  Closes file if the file is still open
      */
     virtual ~Dir();
 
     /** Open a directory on the filesystem
      *
      *  @param fs       Filesystem as target for a directory
      *  @param path     Name of the directory to open
      *  @return         0 on success, negative error code on failure
      */
     virtual int open(FileSystem *fs, const char *path);
 
     /** Close a directory
      *
      *  @return         0 on success, negative error code on failure
      */
     virtual int close();
 
     /** Read the next directory entry
      *
      *  @param ent      The directory entry to fill out
      *  @return         1 on reading a filename, 0 at end of directory, negative error on failure
      */
     virtual ssize_t read(struct dirent *ent);
 
     /** Set the current position of the directory
      *
      *  @param offset   Offset of the location to seek to,
      *                  must be a value returned from tell
      */
     virtual void seek(off_t offset);
 
     /** Get the current position of the directory
      *
      *  @return         Position of the directory that can be passed to rewind
      */
     virtual off_t tell();
 
     /** Rewind the current position to the beginning of the directory
      */
     virtual void rewind();
 
     /** Get the sizeof the directory
      *
      *  @return         Number of files in the directory
      */
     virtual size_t size();
 
 private:
     FileSystem *_fs;
     fs_dir_t _dir;
 };
 
 
 /** @}*/
 } // namespace mbed
 
 #endif
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