1/* input_file.h header for input-file.c
2   Copyright 1987, 1992, 1993, 2000, 2003, 2005, 2006
3   Free Software Foundation, Inc.
4
5   This file is part of GAS, the GNU Assembler.
6
7   GAS is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 2, or (at your option)
10   any later version.
11
12   GAS is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with GAS; see the file COPYING.  If not, write to the Free
19   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
20   02110-1301, USA.  */
21
22/*"input_file.c":Operating-system dependant functions to read source files.*/
23
24/*
25 * No matter what the operating system, this module must provide the
26 * following services to its callers.
27 *
28 * input_file_begin()			Call once before anything else.
29 *
30 * input_file_end()			Call once after everything else.
31 *
32 * input_file_buffer_size()		Call anytime. Returns largest possible
33 *					delivery from
34 *					input_file_give_next_buffer().
35 *
36 * input_file_open(name)		Call once for each input file.
37 *
38 * input_file_give_next_buffer(where)	Call once to get each new buffer.
39 *					Return 0: no more chars left in file,
40 *					   the file has already been closed.
41 *					Otherwise: return a pointer to just
42 *					   after the last character we read
43 *					   into the buffer.
44 *					If we can only read 0 characters, then
45 *					end-of-file is faked.
46 *
47 * input_file_push()			Push state, which can be restored
48 *					later.  Does implicit input_file_begin.
49 *					Returns char * to saved state.
50 *
51 * input_file_pop (arg)			Pops previously saved state.
52 *
53 * input_file_close ()			Closes opened file.
54 *
55 * All errors are reported so caller doesn't have to think
56 * about I/O errors.
57 */
58
59char *input_file_give_next_buffer (char *where);
60char *input_file_push (void);
61unsigned int input_file_buffer_size (void);
62void input_file_begin (void);
63void input_file_close (void);
64void input_file_end (void);
65void input_file_open (char *filename, int pre);
66void input_file_pop (char *arg);
67