lib/getversion.c

   1 /* getversion.c -- select backup filename type
   2    Copyright (C) 1990 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; if not, write to the Free Software
  16    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17
  18 /* Written by David MacKenzie <djm@gnu.ai.mit.edu> */
  19
  20 #include "backupfile.h"
  21
  22 #ifdef STDC_HEADERS
  23 #include <stdlib.h>
  24 #endif
  25
  26 int argmatch ();
  27 void invalid_arg ();
  28
  29 extern char *program_name;
  30
  31 static char *backup_args[] =
  32 {
  33   "never", "simple", "nil", "existing", "t", "numbered", 0
  34 };
  35
  36 static enum backup_type backup_types[] =
  37 {
  38   simple, simple, numbered_existing, numbered_existing, numbered, numbered
  39 };
  40
  41 /* Return the type of backup indicated by VERSION.
  42    Unique abbreviations are accepted. */
  43
  44 enum backup_type
  45 get_version (version)
  46      char *version;
  47 {
  48   int i;
  49
  50   if (version == 0 || *version == 0)
  51     return numbered_existing;
  52   i = argmatch (version, backup_args);
  53   if (i >= 0)
  54     return backup_types[i];
  55   invalid_arg ("version control type", version, i);
  56   exit (1);
  57 }