blob: b32208aad5508ee86afa10a3319f8af58fad2582 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C) International Business Machines Corp., 2000-2004
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the 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 to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19#include <linux/fs.h>
20#include <linux/slab.h>
21#include "jfs_incore.h"
22#include "jfs_filsys.h"
23#include "jfs_unicode.h"
24#include "jfs_debug.h"
25
26/*
27 * NAME: jfs_strfromUCS()
28 *
29 * FUNCTION: Convert little-endian unicode string to character string
30 *
31 */
32int jfs_strfromUCS_le(char *to, const __le16 * from,
33 int len, struct nls_table *codepage)
34{
35 int i;
36 int outlen = 0;
37 static int warn_again = 5; /* Only warn up to 5 times total */
38 int warn = !!warn_again; /* once per string */
39
40 if (codepage) {
41 for (i = 0; (i < len) && from[i]; i++) {
42 int charlen;
43 charlen =
44 codepage->uni2char(le16_to_cpu(from[i]),
45 &to[outlen],
46 NLS_MAX_CHARSET_SIZE);
47 if (charlen > 0)
48 outlen += charlen;
49 else
50 to[outlen++] = '?';
51 }
52 } else {
53 for (i = 0; (i < len) && from[i]; i++) {
54 if (le16_to_cpu(from[i]) & 0xff00) {
55 if (warn) {
56 warn--;
57 warn_again--;
58 printk(KERN_ERR
59 "non-latin1 character 0x%x found in JFS file name\n",
60 le16_to_cpu(from[i]));
61 printk(KERN_ERR
62 "mount with iocharset=utf8 to access\n");
63 }
64 to[i] = '?';
65 }
66 else
67 to[i] = (char) (le16_to_cpu(from[i]));
68 }
69 outlen = i;
70 }
71 to[outlen] = 0;
72 return outlen;
73}
74
75/*
76 * NAME: jfs_strtoUCS()
77 *
78 * FUNCTION: Convert character string to unicode string
79 *
80 */
81static int jfs_strtoUCS(wchar_t * to, const unsigned char *from, int len,
82 struct nls_table *codepage)
83{
84 int charlen;
85 int i;
86
87 if (codepage) {
88 for (i = 0; len && *from; i++, from += charlen, len -= charlen)
89 {
90 charlen = codepage->char2uni(from, len, &to[i]);
91 if (charlen < 1) {
92 jfs_err("jfs_strtoUCS: char2uni returned %d.",
93 charlen);
94 jfs_err("charset = %s, char = 0x%x",
95 codepage->charset, *from);
96 return charlen;
97 }
98 }
99 } else {
100 for (i = 0; (i < len) && from[i]; i++)
101 to[i] = (wchar_t) from[i];
102 }
103
104 to[i] = 0;
105 return i;
106}
107
108/*
109 * NAME: get_UCSname()
110 *
111 * FUNCTION: Allocate and translate to unicode string
112 *
113 */
114int get_UCSname(struct component_name * uniName, struct dentry *dentry)
115{
116 struct nls_table *nls_tab = JFS_SBI(dentry->d_sb)->nls_tab;
117 int length = dentry->d_name.len;
118
119 if (length > JFS_NAME_MAX)
120 return -ENAMETOOLONG;
121
122 uniName->name =
123 kmalloc((length + 1) * sizeof(wchar_t), GFP_NOFS);
124
125 if (uniName->name == NULL)
126 return -ENOSPC;
127
128 uniName->namlen = jfs_strtoUCS(uniName->name, dentry->d_name.name,
129 length, nls_tab);
130
131 if (uniName->namlen < 0) {
132 kfree(uniName->name);
133 return uniName->namlen;
134 }
135
136 return 0;
137}