1/*	$NetBSD: ntfs_conv.c,v 1.9 2008/04/28 20:24:02 martin 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 1.9 2008/04/28 20:24:02 martin Exp $");
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/namei.h>
39#include <sys/kernel.h>
40#include <sys/mount.h>
41#include <sys/malloc.h>
42
43#include <fs/ntfs/ntfs.h>
44#include <fs/ntfs/ntfs_inode.h>
45#include <fs/ntfs/ntfs_subr.h>
46
47/* UTF-8 encoding stuff */
48#include <fs/unicode.h>
49
50/*
51 * Read one wide character off the string, shift the string pointer
52 * and return the character.
53 */
54wchar
55ntfs_utf8_wget(const char **str, size_t *sz)
56{
57	return (wchar) wget_utf8(str, sz);
58}
59
60/*
61 * Encode wide character and write it to the string. 'n' specifies
62 * how much space there is in the string. Returns number of bytes written
63 * to the target string.
64 */
65int
66ntfs_utf8_wput(char *s, size_t n, wchar wc)
67{
68	return wput_utf8(s, n, (u_int16_t) wc);
69}
70
71/*
72 * Compare two wide characters, returning 1, 0, -1 if the first is
73 * bigger, equal or lower than the second.
74 */
75int
76ntfs_utf8_wcmp(wchar wc1, wchar wc2)
77{
78	/* no conversions needed for utf8 */
79
80	if (wc1 == wc2)
81		return 0;
82	else
83		return (int) wc1 - (int) wc2;
84}
85