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/* backupfile.h -- declarations for making Emacs style backup file names
Copyright (C) 1990-1992, 1997-1999, 2003-2004, 2009-2022 Free Software
Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#ifndef BACKUPFILE_H_
#define BACKUPFILE_H_
/* Get AT_FDCWD, as a convenience for users of this file. */
#include <fcntl.h>
#include <stdlib.h>
#ifdef __cplusplus
extern "C" {
#endif
/* When to make backup files. */
enum backup_type
{
/* Never make backups. */
no_backups,
/* Make simple backups of every file. */
simple_backups,
/* Make numbered backups of files that already have numbered backups,
and simple backups of the others. */
numbered_existing_backups,
/* Make numbered backups of every file. */
numbered_backups
};
#define VALID_BACKUP_TYPE(Type) \
((unsigned int) (Type) <= numbered_backups)
extern char const *simple_backup_suffix;
void set_simple_backup_suffix (char const *);
char *backup_file_rename (int, char const *, enum backup_type)
_GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
char *find_backup_file_name (int, char const *, enum backup_type)
_GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
_GL_ATTRIBUTE_RETURNS_NONNULL;
enum backup_type get_version (char const *context, char const *arg);
enum backup_type xget_version (char const *context, char const *arg);
#ifdef __cplusplus
}
#endif
#endif /* ! BACKUPFILE_H_ */
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