1 /* input_file.h header for input-file.c
2 Copyright 1987, 1992, 1993, 2000 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
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 2, or (at your option)
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.
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 the Free
18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
21 /*"input_file.c":Operating-system dependant functions to read source files.*/
24 * No matter what the operating system, this module must provide the
25 * following services to its callers.
27 * input_file_begin() Call once before anything else.
29 * input_file_end() Call once after everything else.
31 * input_file_buffer_size() Call anytime. Returns largest possible
33 * input_file_give_next_buffer().
35 * input_file_open(name) Call once for each input file.
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
43 * If we can only read 0 characters, then
44 * end-of-file is faked.
46 * input_file_push() Push state, which can be restored
47 * later. Does implicit input_file_begin.
48 * Returns char * to saved state.
50 * input_file_pop (arg) Pops previously saved state.
52 * input_file_close () Closes opened file.
54 * All errors are reported (using as_perror) so caller doesn't have to think
55 * about I/O errors. No I/O errors are fatal: an end-of-file may be faked.
58 char *input_file_give_next_buffer (char *where
);
59 char *input_file_push (void);
60 unsigned int input_file_buffer_size (void);
61 int input_file_is_open (void);
62 void input_file_begin (void);
63 void input_file_close (void);
64 void input_file_end (void);
65 void input_file_open (char *filename
, int pre
);
66 void input_file_pop (char *arg
);
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