/*
   * This file is part of the MicroPython project, http://micropython.org/
   *
   * The MIT License (MIT)
   *
   * Copyright (c) 2013-2016 Damien P. George
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  #ifndef MICROPY_INCLUDED_PY_READER_H
  #define MICROPY_INCLUDED_PY_READER_H
  
  #include "py/obj.h"
  
  // the readbyte function must return the next byte in the input stream
  // it must return MP_READER_EOF if end of stream
  // it can be called again after returning MP_READER_EOF, and in that case must return MP_READER_EOF
  #define MP_READER_EOF ((mp_uint_t)(-1))
  
  typedef struct _mp_reader_t {
      void *data;
      mp_uint_t (*readbyte)(void *data);
      void (*close)(void *data);
  } mp_reader_t;
  
  void mp_reader_new_mem(mp_reader_t *reader, const byte *buf, size_t len, size_t free_len);
  void mp_reader_new_file(mp_reader_t *reader, const char *filename);
  void mp_reader_new_file_from_fd(mp_reader_t *reader, int fd, bool close_fd);
  
  #endif // MICROPY_INCLUDED_PY_READER_H