marlin/Marlin/src/lcd/extensible_ui/lib/ftdi_eve_touch_ui/archim2-flash/media_file_reader.cpp

/************************
 * media_filereader.cpp *
 ************************/

/****************************************************************************
 *   Written By Mark Pelletier  2017 - Aleph Objects, Inc.                  *
 *   Written By Marcio Teixeira 2018 - Aleph Objects, Inc.                  *
 *                                                                          *
 *   This program is free software: you can redistribute it and/or modify   *
 *   it under the terms of the GNU General Public License as published by   *
 *   the Free Software Foundation, either version 3 of the License, or      *
 *   (at your option) any later version.                                    *
 *                                                                          *
 *   This program 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 General Public License for more details.                           *
 *                                                                          *
 *   To view a copy of the GNU General Public License, go to the following  *
 *   location: <http://www.gnu.org/licenses/>.                              *
 ****************************************************************************/

#include "../compat.h"

#if ENABLED(TOUCH_UI_FTDI_EVE)
  #include "media_file_reader.h"

  #if ENABLED(SDSUPPORT)
    bool MediaFileReader::open(const char* filename) {
      card.init(SPI_SPEED, SDSS);
      volume.init(&card);
      root.openRoot(&volume);
      return file.open(&root, filename, O_READ);
    }

    int16_t MediaFileReader::read(void *buff, size_t bytes) {
      return file.read(buff, bytes);
    }

    void MediaFileReader::close() {
      file.close();
    }

    uint32_t MediaFileReader::size() {
      return file.fileSize();
    }

    void MediaFileReader::rewind() {
      file.rewind();
    }

    int16_t MediaFileReader::read(void *obj, void *buff, size_t bytes) {
      return reinterpret_cast<MediaFileReader*>(obj)->read(buff, bytes);
    }
  #else
    bool MediaFileReader::open(const char*)               {return -1;}
    int16_t MediaFileReader::read(void *, size_t)         {return 0;}
    void MediaFileReader::close()                         {}
    uint32_t MediaFileReader::size()                      {return 0;}
    void MediaFileReader::rewind()                        {}
    int16_t MediaFileReader::read(void *, void *, size_t) {return 0;}
  #endif
#endif // TOUCH_UI_FTDI_EVE