contrib/tar/lib/backupfile.h

   1 /* backupfile.h -- declarations for making Emacs style backup file names
   2    Copyright (C) 1990-1992, 1997-1999 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 #ifndef BACKUPFILE_H_
  20 # define BACKUPFILE_H_
  21
  22 /* When to make backup files. */
  23 enum backup_type
  24 {
  25   /* Never make backups. */
  26   none,
  27
  28   /* Make simple backups of every file. */
  29   simple,
  30
  31   /* Make numbered backups of files that already have numbered backups,
  32      and simple backups of the others. */
  33   numbered_existing,
  34
  35   /* Make numbered backups of every file. */
  36   numbered
  37 };
  38
  39 # define VALID_BACKUP_TYPE(Type)        \
  40   ((Type) == none                       \
  41    || (Type) == simple                  \
  42    || (Type) == numbered_existing       \
  43    || (Type) == numbered)
  44
  45 extern char const *simple_backup_suffix;
  46
  47 # ifndef PARAMS
  48 #  if defined PROTOTYPES || (defined __STDC__ && __STDC__)
  49 #   define PARAMS(Args) Args
  50 #  else
  51 #   define PARAMS(Args) ()
  52 #  endif
  53 # endif
  54
  55 char *find_backup_file_name PARAMS ((char const *, enum backup_type));
  56 enum backup_type get_version PARAMS ((char const *context, char const *arg));
  57 enum backup_type xget_version PARAMS ((char const *context, char const *arg));
  58 void addext PARAMS ((char *, char const *, int));
  59
  60 #endif /* ! BACKUPFILE_H_ */