source: rtos_arduino/trunk/arduino_lib/libraries/Bridge/src/FileIO.h@ 136

/*
  Copyright (c) 2013 Arduino LLC. All right reserved.

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/

#ifndef __FILEIO_H__
#define __FILEIO_H__

#include <Process.h>

#define FILE_READ 0
#define FILE_WRITE 1
#define FILE_APPEND 2

class File : public Stream {

  public:
    File(BridgeClass &b = Bridge);
    File(const char *_filename, uint8_t _mode, BridgeClass &b = Bridge);
    ~File();

    virtual size_t write(uint8_t);
    virtual size_t write(const uint8_t *buf, size_t size);
    virtual int read();
    virtual int peek();
    virtual int available();
    virtual void flush();
    int read(void *buf, uint16_t nbyte);
    boolean seek(uint32_t pos);
    uint32_t position();
    uint32_t size();
    void close();
    operator bool();
    const char * name();
    boolean isDirectory();
    File openNextFile(uint8_t mode = FILE_READ);
    void rewindDirectory(void);

    //using Print::write;

  private:
    void doBuffer();
    uint8_t buffered;
    uint8_t readPos;
    uint16_t dirPosition;
    static const int BUFFER_SIZE = 64;
    uint8_t buffer[BUFFER_SIZE];


  private:
    BridgeClass &bridge;
    String filename;
    uint8_t mode;
    uint8_t handle;

};

class FileSystemClass {
  public:
    FileSystemClass() : bridge(Bridge) { }
    FileSystemClass(BridgeClass &_b) : bridge(_b) { }

    boolean begin();

    // Open the specified file/directory with the supplied mode (e.g. read or
    // write, etc). Returns a File object for interacting with the file.
    // Note that currently only one file can be open at a time.
    File open(const char *filename, uint8_t mode = FILE_READ);

    // Methods to determine if the requested file path exists.
    boolean exists(const char *filepath);

    // Create the requested directory hierarchy--if intermediate directories
    // do not exist they will be created.
    boolean mkdir(const char *filepath);

    // Delete the file.
    boolean remove(const char *filepath);

    boolean rmdir(const char *filepath);

  private:
    friend class File;

    BridgeClass &bridge;
};

extern FileSystemClass FileSystem;

#endif