lib/backupfile.h

   1 /* backupfile.h -- declarations for making Emacs style backup file names
   2    Copyright (C) 1990, 1991, 1992, 1997, 1998 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 2, or (at your option)
   7    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; see the file COPYING.
  16    If not, write to the Free Software Foundation,
  17    59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 /* When to make backup files. */
  20 enum backup_type
  21 {
  22   /* Never make backups. */
  23   none,
  24
  25   /* Make simple backups of every file. */
  26   simple,
  27
  28   /* Make numbered backups of files that already have numbered backups,
  29      and simple backups of the others. */
  30   numbered_existing,
  31
  32   /* Make numbered backups of every file. */
  33   numbered
  34 };
  35
  36 #define VALID_BACKUP_TYPE(Type)         \
  37   ((Type) == none                       \
  38    || (Type) == simple                  \
  39    || (Type) == numbered_existing       \
  40    || (Type) == numbered)
  41
  42 extern char const *simple_backup_suffix;
  43
  44 #ifndef PARAMS
  45 # if defined PROTOTYPES || (defined __STDC__ && __STDC__)
  46 #  define PARAMS(Args) Args
  47 # else
  48 #  define PARAMS(Args) ()
  49 # endif
  50 #endif
  51
  52 char *base_name PARAMS ((char const *));
  53 char *find_backup_file_name PARAMS ((char const *, enum backup_type));
  54 enum backup_type get_version PARAMS ((char const *));
  55 void addext PARAMS ((char *, char const *, int));