fs/ntfs/collate.h

   1 /*
   2  * collate.h - Defines for NTFS kernel collation handling.  Part of the
   3  *             Linux-NTFS project.
   4  *
   5  * Copyright (c) 2004 Anton Altaparmakov
   6  *
   7  * This program/include file is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program/include file is distributed in the hope that it will be
  13  * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program (in the main directory of the Linux-NTFS
  19  * distribution in the file COPYING); if not, write to the Free Software
  20  * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #ifndef _LINUX_NTFS_COLLATE_H
  24 #define _LINUX_NTFS_COLLATE_H
  25
  26 #include "types.h"
  27 #include "volume.h"
  28
  29 static inline bool ntfs_is_collation_rule_supported(COLLATION_RULE cr) {
  30         int i;
  31
  32         /*
  33          * FIXME:  At the moment we only support COLLATION_BINARY and
  34          * COLLATION_NTOFS_ULONG, so we return false for everything else for
  35          * now.
  36          */
  37         if (unlikely(cr != COLLATION_BINARY && cr != COLLATION_NTOFS_ULONG))
  38                 return false;
  39         i = le32_to_cpu(cr);
  40         if (likely(((i >= 0) && (i <= 0x02)) ||
  41                         ((i >= 0x10) && (i <= 0x13))))
  42                 return true;
  43         return false;
  44 }
  45
  46 extern int ntfs_collate(ntfs_volume *vol, COLLATION_RULE cr,
  47                 const void *data1, const int data1_len,
  48                 const void *data2, const int data2_len);
  49
  50 #endif /* _LINUX_NTFS_COLLATE_H */