lib/backupfile.h

   1 /* backupfile.h -- declarations for making Emacs style backup file names
   2
   3    Copyright (C) 1990, 1991, 1992, 1997, 1998, 1999, 2003 Free
   4    Software 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 2, or (at your option)
   9    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; see the file COPYING.
  18    If not, write to the Free Software Foundation,
  19    59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef BACKUPFILE_H_
  22 # define BACKUPFILE_H_
  23
  24 /* When to make backup files. */
  25 enum backup_type
  26 {
  27   /* Never make backups. */
  28   none,
  29
  30   /* Make simple backups of every file. */
  31   simple,
  32
  33   /* Make numbered backups of files that already have numbered backups,
  34      and simple backups of the others. */
  35   numbered_existing,
  36
  37   /* Make numbered backups of every file. */
  38   numbered
  39 };
  40
  41 # define VALID_BACKUP_TYPE(Type)        \
  42   ((Type) == none                       \
  43    || (Type) == simple                  \
  44    || (Type) == numbered_existing       \
  45    || (Type) == numbered)
  46
  47 extern char const *simple_backup_suffix;
  48
  49 char *find_backup_file_name (char const *, enum backup_type);
  50 enum backup_type get_version (char const *context, char const *arg);
  51 enum backup_type xget_version (char const *context, char const *arg);
  52 void addext (char *, char const *, int);
  53
  54 #endif /* ! BACKUPFILE_H_ */