db/hash.c

   1 /*
   2  * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would 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 the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include <xfs/libxfs.h>
  20 #include "addr.h"
  21 #include "command.h"
  22 #include "type.h"
  23 #include "io.h"
  24 #include "output.h"
  25
  26 static int hash_f(int argc, char **argv);
  27 static void hash_help(void);
  28
  29 static const cmdinfo_t hash_cmd =
  30         { "hash", NULL, hash_f, 1, 1, 0, N_("string"),
  31           N_("calculate hash value"), hash_help };
  32
  33 static void
  34 hash_help(void)
  35 {
  36         dbprintf(_(
  37 "\n"
  38 " 'hash' prints out the calculated hash value for a string using the\n"
  39 "directory/attribute code hash function.\n"
  40 "\n"
  41 " Usage:  \"hash <string>\"\n"
  42 "\n"
  43 ));
  44
  45 }
  46
  47 /* ARGSUSED */
  48 static int
  49 hash_f(
  50         int             argc,
  51         char            **argv)
  52 {
  53         xfs_dahash_t    hashval;
  54
  55         hashval = libxfs_da_hashname((uchar_t *)argv[1], (int)strlen(argv[1]));
  56         dbprintf("0x%x\n", hashval);
  57         return 0;
  58 }
  59
  60 void
  61 hash_init(void)
  62 {
  63         add_command(&hash_cmd);
  64 }