text: /* input_file.h header for input-file.c
     Copyright (C) 1987-2016 Free Software Foundation, Inc.
  
     This file is part of GAS, the GNU Assembler.
  
     GAS 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, or (at your option)
     any later version.
  
     GAS 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.
  
     You should have received a copy of the GNU General Public License
     along with GAS; see the file COPYING.  If not, write to the Free
     Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
     02110-1301, USA.  */
  
  /*"input_file.c":Operating-system dependant functions to read source files.*/
  
  /*
   * No matter what the operating system, this module must provide the
   * following services to its callers.
   *
   * input_file_begin()			Call once before anything else.
   *
   * input_file_end()			Call once after everything else.
   *
   * input_file_buffer_size()		Call anytime. Returns largest possible
   *					delivery from
   *					input_file_give_next_buffer().
   *
   * input_file_open(name)		Call once for each input file.
   *
   * input_file_give_next_buffer(where)	Call once to get each new buffer.
   *					Return 0: no more chars left in file,
   *					   the file has already been closed.
   *					Otherwise: return a pointer to just
   *					   after the last character we read
   *					   into the buffer.
   *					If we can only read 0 characters, then
   *					end-of-file is faked.
   *
   * input_file_push()			Push state, which can be restored
   *					later.  Does implicit input_file_begin.
   *					Returns char * to saved state.
   *
   * input_file_pop (arg)			Pops previously saved state.
   *
   * input_file_close ()			Closes opened file.
   *
   * All errors are reported so caller doesn't have to think
   * about I/O errors.
   */
  
  char *input_file_give_next_buffer (char *where);
  char *input_file_push (void);
  size_t input_file_buffer_size (void);
  void input_file_begin (void);
  void input_file_close (void);
  void input_file_end (void);
  void input_file_open (const char *filename, int pre);
  void input_file_pop (char *arg);
  