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1 | /* |
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 | */ |
32 | int 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 (unlikely(le16_to_cpu(from[i]) & 0xff00)) { |
55 | to[i] = '?'; |
56 | if (unlikely(warn)) { |
57 | warn--; |
58 | warn_again--; |
59 | printk(KERN_ERR |
60 | "non-latin1 character 0x%x found in JFS file name\n", |
61 | le16_to_cpu(from[i])); |
62 | printk(KERN_ERR |
63 | "mount with iocharset=utf8 to access\n"); |
64 | } |
65 | |
66 | } |
67 | else |
68 | to[i] = (char) (le16_to_cpu(from[i])); |
69 | } |
70 | outlen = i; |
71 | } |
72 | to[outlen] = 0; |
73 | return outlen; |
74 | } |
75 | |
76 | /* |
77 | * NAME: jfs_strtoUCS() |
78 | * |
79 | * FUNCTION: Convert character string to unicode string |
80 | * |
81 | */ |
82 | static int jfs_strtoUCS(wchar_t * to, const unsigned char *from, int len, |
83 | struct nls_table *codepage) |
84 | { |
85 | int charlen; |
86 | int i; |
87 | |
88 | if (codepage) { |
89 | for (i = 0; len && *from; i++, from += charlen, len -= charlen) |
90 | { |
91 | charlen = codepage->char2uni(from, len, &to[i]); |
92 | if (charlen < 1) { |
93 | jfs_err("jfs_strtoUCS: char2uni returned %d.", |
94 | charlen); |
95 | jfs_err("charset = %s, char = 0x%x", |
96 | codepage->charset, *from); |
97 | return charlen; |
98 | } |
99 | } |
100 | } else { |
101 | for (i = 0; (i < len) && from[i]; i++) |
102 | to[i] = (wchar_t) from[i]; |
103 | } |
104 | |
105 | to[i] = 0; |
106 | return i; |
107 | } |
108 | |
109 | /* |
110 | * NAME: get_UCSname() |
111 | * |
112 | * FUNCTION: Allocate and translate to unicode string |
113 | * |
114 | */ |
115 | int get_UCSname(struct component_name * uniName, struct dentry *dentry) |
116 | { |
117 | struct nls_table *nls_tab = JFS_SBI(dentry->d_sb)->nls_tab; |
118 | int length = dentry->d_name.len; |
119 | |
120 | if (length > JFS_NAME_MAX) |
121 | return -ENAMETOOLONG; |
122 | |
123 | uniName->name = |
124 | kmalloc((length + 1) * sizeof(wchar_t), GFP_NOFS); |
125 | |
126 | if (uniName->name == NULL) |
127 | return -ENOMEM; |
128 | |
129 | uniName->namlen = jfs_strtoUCS(uniName->name, dentry->d_name.name, |
130 | length, nls_tab); |
131 | |
132 | if (uniName->namlen < 0) { |
133 | kfree(uniName->name); |
134 | return uniName->namlen; |
135 | } |
136 | |
137 | return 0; |
138 | } |
139 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9