1 /* backupfile.h -- declarations for making Emacs style backup file names 2 Copyright (C) 1990-1992, 1997-1999, 2001-2003 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 16 17 #ifndef BACKUPFILE_H_ 18 # define BACKUPFILE_H_ 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 25 /* When to make backup files. */ 26 enum backup_type 27 { 28 /* Never make backups. */ 29 none, 30 31 /* Make simple backups of every file. */ 32 simple, 33 34 /* Make numbered backups of files that already have numbered backups, 35 and simple backups of the others. */ 36 numbered_existing, 37 38 /* Make numbered backups of every file. */ 39 numbered 40 }; 41 42 # define VALID_BACKUP_TYPE(Type) \ 43 ((Type) == none \ 44 || (Type) == simple \ 45 || (Type) == numbered_existing \ 46 || (Type) == numbered) 47 48 extern DLL_VARIABLE char const *simple_backup_suffix; 49 50 extern char *find_backup_file_name (char const *file, 51 enum backup_type backup_type); 52 extern enum backup_type get_version (char const *context, char const *arg); 53 extern enum backup_type xget_version (char const *context, char const *arg); 54 extern void addext (char *filename, char const *ext, char e); 55 56 57 #ifdef __cplusplus 58 } 59 #endif 60 61 #endif /* ! BACKUPFILE_H_ */ 62