1/* backupfile.h -- declarations for making Emacs style backup file names
2
3   Copyright (C) 1990-1992, 1997-1999, 2003-2004, 2009-2010 Free Software
4   Foundation, Inc.
5
6   This program 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 3 of the License, or
9   (at your option) any later version.
10
11   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */
18
19#ifndef BACKUPFILE_H_
20# define BACKUPFILE_H_
21
22# ifdef __cplusplus
23extern "C" {
24# endif
25
26
27/* When to make backup files. */
28enum backup_type
29{
30  /* Never make backups. */
31  no_backups,
32
33  /* Make simple backups of every file. */
34  simple_backups,
35
36  /* Make numbered backups of files that already have numbered backups,
37     and simple backups of the others. */
38  numbered_existing_backups,
39
40  /* Make numbered backups of every file. */
41  numbered_backups
42};
43
44# define VALID_BACKUP_TYPE(Type)        \
45  ((unsigned int) (Type) <= numbered_backups)
46
47extern char const *simple_backup_suffix;
48
49char *find_backup_file_name (char const *, enum backup_type);
50enum backup_type get_version (char const *context, char const *arg);
51enum backup_type xget_version (char const *context, char const *arg);
52void addext (char *, char const *, int);
53
54
55# ifdef __cplusplus
56}
57# endif
58
59#endif /* ! BACKUPFILE_H_ */
60