as/input-file.h

   1 /* input_file.h header for input-file.c
   2    Copyright (C) 1987 Free Software Foundation, Inc.
   3
   4 This file is part of GAS, the GNU Assembler.
   5
   6 GAS is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 1, or (at your option)
   9 any later version.
  10
  11 GAS is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GAS; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /*"input_file.c":Operating-system dependant functions to read source files.*/
  21
  22
  23 /*
  24  * No matter what the operating system, this module must provide the
  25  * following services to its callers.
  26  *
  27  * input_file_begin()                   Call once before anything else.
  28  *
  29  * input_file_end()                     Call once after everything else.
  30  *
  31  * input_file_buffer_size()             Call anytime. Returns largest possible
  32  *                                      delivery from
  33  *                                      input_file_give_next_buffer().
  34  *
  35  * input_file_open(name)                Call once for each input file.
  36  *
  37  * input_file_give_next_buffer(where)   Call once to get each new buffer.
  38  *                                      Return 0: no more chars left in file,
  39  *                                         the file has already been closed.
  40  *                                      Otherwise: return a pointer to just
  41  *                                         after the last character we read
  42  *                                         into the buffer.
  43  *                                      If we can only read 0 characters, then
  44  *                                      end-of-file is faked.
  45  *
  46  * All errors are reported (using as_perror) so caller doesn't have to think
  47  * about I/O errors. No I/O errors are fatal: an end-of-file may be faked.
  48  */
  49 extern FILE *f_in;
  50 extern char *file_name;
  51
  52 #ifdef SUSPECT
  53 extern int preprocess;
  54 #endif
  55
  56 extern void input_file_begin(
  57     void);
  58 extern void input_file_end(
  59     void);
  60 extern int input_file_buffer_size(
  61     void);
  62 extern int input_file_is_open(
  63     void);
  64 extern void input_file_open(
  65     char *filename,
  66     int pre);
  67 extern char *input_file_give_next_buffer(
  68     char *where);