1/* input_file.h header for input-file.c
2   Copyright (C) 1987 Free Software Foundation, Inc.
3
4This file is part of GAS, the GNU Assembler.
5
6GAS is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 1, or (at your option)
9any later version.
10
11GAS is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GAS; see the file COPYING.  If not, write to
18the 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 *		give_next_size)		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 *				        give_next_size is the BUFFER_SIZE it
46 *					   will use next.
47 *
48 * All errors are reported (using as_perror) so caller doesn't have to think
49 * about I/O errors. No I/O errors are fatal: an end-of-file may be faked.
50 */
51extern FILE *f_in;
52extern char *file_name;
53
54#ifdef SUSPECT
55extern int preprocess;
56#endif
57
58extern void input_file_begin(
59    void);
60extern void input_file_end(
61    void);
62extern int input_file_buffer_size(
63    void);
64extern int input_file_is_open(
65    void);
66extern void input_file_open(
67    char *filename,
68    int pre);
69extern char *input_file_give_next_buffer(
70    char *where,
71    int *give_next_size);
72