db/hash.c

   1 /*
   2  * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32
  33 #include <libxfs.h>
  34 #include "addr.h"
  35 #include "command.h"
  36 #include "type.h"
  37 #include "io.h"
  38 #include "output.h"
  39
  40 static int hash_f(int argc, char **argv);
  41 static void hash_help(void);
  42
  43 static const cmdinfo_t hash_cmd =
  44         { "hash", NULL, hash_f, 1, 1, 0, "string",
  45           "calculate hash value", hash_help };
  46
  47 static void
  48 hash_help(void)
  49 {
  50         dbprintf(
  51 "\n"
  52 " 'hash' prints out the calculated hash value for a string using the\n"
  53 "directory/attribute code hash function.\n"
  54 "\n"
  55 " Usage:  \"hash <string>\"\n"
  56 "\n"
  57 );
  58
  59 }
  60
  61 /* ARGSUSED */
  62 static int
  63 hash_f(
  64         int             argc,
  65         char            **argv)
  66 {
  67         xfs_dahash_t    hashval;
  68
  69         hashval = libxfs_da_hashname(argv[1], (int)strlen(argv[1]));
  70         dbprintf("0x%x\n", hashval);
  71         return 0;
  72 }
  73
  74 void
  75 hash_init(void)
  76 {
  77         add_command(&hash_cmd);
  78 }