1 /*
2  * $OpenBSD: backupfile.h,v 1.6 2003/07/28 18:35:36 otto Exp $
3  * $DragonFly: src/usr.bin/patch/backupfile.h,v 1.3 2007/09/29 23:11:10 swildner Exp $
4  * $NetBSD: backupfile.h,v 1.7 2021/02/19 17:46:53 nia Exp $
5  */
6 
7 /*
8  * backupfile.h -- declarations for making Emacs style backup file names
9  * Copyright (C) 1990 Free Software Foundation, Inc.
10  *
11  * This program is free software; you can redistribute it and/or modify it
12  * without restriction.
13  *
14  * This program is distributed in the hope that it will be useful, but WITHOUT
15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16  * FITNESS FOR A PARTICULAR PURPOSE.
17  *
18  */
19 
20 /* When to make backup files. */
21 enum backup_type {
22           undefined,
23 
24           /* Never make backups. */
25           none,
26 
27           /* Make simple backups of every file. */
28           simple,
29 
30           /*
31            * Make numbered backups of files that already have numbered backups,
32            * and simple backups of the others.
33            */
34           numbered_existing,
35 
36           /* Make numbered backups of every file. */
37           numbered
38 };
39 
40 extern enum backup_type backup_type;
41 extern const char   *simple_backup_suffix;
42 
43 char                *find_backup_file_name(const char *file);
44 enum backup_type get_version(const char *version);
45