sys/fs/ntfs/ntfs_conv.c

   1 /*      $NetBSD: ntfs_conv.c,v 1.8 2008/01/29 18:21:10 pooka Exp $      */
   2
   3 /*-
   4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /*
  30  * File name recode stuff.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __KERNEL_RCSID(0, "$NetBSD: ntfs_conv.c,v 1.8 2008/01/29 18:21:10 pooka Exp $");
  35
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/namei.h>
  39 #include <sys/proc.h>
  40 #include <sys/kernel.h>
  41 #include <sys/vnode.h>
  42 #include <sys/mount.h>
  43 #include <sys/buf.h>
  44 #include <sys/file.h>
  45 #include <sys/malloc.h>
  46 #include <sys/lock.h>
  47
  48 #include <miscfs/specfs/specdev.h>
  49
  50 #include <fs/ntfs/ntfs.h>
  51 #include <fs/ntfs/ntfsmount.h>
  52 #include <fs/ntfs/ntfs_inode.h>
  53 #include <fs/ntfs/ntfs_vfsops.h>
  54 #include <fs/ntfs/ntfs_subr.h>
  55 #include <fs/ntfs/ntfs_compr.h>
  56 #include <fs/ntfs/ntfs_ihash.h>
  57
  58 /* UTF-8 encoding stuff */
  59 #include <fs/unicode.h>
  60
  61 /*
  62  * Read one wide character off the string, shift the string pointer
  63  * and return the character.
  64  */
  65 wchar
  66 ntfs_utf8_wget(const char **str, size_t *sz)
  67 {
  68         return (wchar) wget_utf8(str, sz);
  69 }
  70
  71 /*
  72  * Encode wide character and write it to the string. 'n' specifies
  73  * how much space there is in the string. Returns number of bytes written
  74  * to the target string.
  75  */
  76 int
  77 ntfs_utf8_wput(char *s, size_t n, wchar wc)
  78 {
  79         return wput_utf8(s, n, (u_int16_t) wc);
  80 }
  81
  82 /*
  83  * Compare two wide characters, returning 1, 0, -1 if the first is
  84  * bigger, equal or lower than the second.
  85  */
  86 int
  87 ntfs_utf8_wcmp(wchar wc1, wchar wc2)
  88 {
  89         /* no conversions needed for utf8 */
  90
  91         if (wc1 == wc2)
  92                 return 0;
  93         else
  94                 return (int) wc1 - (int) wc2;
  95 }