1 // SPDX-License-Identifier: GPL-2.0 <<
2 /* 1 /*
3 * linux/fs/isofs/joliet.c 2 * linux/fs/isofs/joliet.c
4 * 3 *
5 * (C) 1996 Gordon Chaffee 4 * (C) 1996 Gordon Chaffee
6 * 5 *
7 * Joliet: Microsoft's Unicode extensions to 6 * Joliet: Microsoft's Unicode extensions to iso9660
8 */ 7 */
9 8
10 #include <linux/types.h> 9 #include <linux/types.h>
11 #include <linux/nls.h> 10 #include <linux/nls.h>
12 #include "isofs.h" 11 #include "isofs.h"
13 12
14 /* 13 /*
15 * Convert Unicode 16 to UTF-8 or ASCII. 14 * Convert Unicode 16 to UTF-8 or ASCII.
16 */ 15 */
17 static int 16 static int
18 uni16_to_x8(unsigned char *ascii, __be16 *uni, 17 uni16_to_x8(unsigned char *ascii, __be16 *uni, int len, struct nls_table *nls)
19 { 18 {
20 __be16 *ip, ch; 19 __be16 *ip, ch;
21 unsigned char *op; 20 unsigned char *op;
22 21
23 ip = uni; 22 ip = uni;
24 op = ascii; 23 op = ascii;
25 24
26 while ((ch = get_unaligned(ip)) && len 25 while ((ch = get_unaligned(ip)) && len) {
27 int llen; 26 int llen;
28 llen = nls->uni2char(be16_to_c 27 llen = nls->uni2char(be16_to_cpu(ch), op, NLS_MAX_CHARSET_SIZE);
29 if (llen > 0) 28 if (llen > 0)
30 op += llen; 29 op += llen;
31 else 30 else
32 *op++ = '?'; 31 *op++ = '?';
33 ip++; 32 ip++;
34 33
35 len--; 34 len--;
36 } 35 }
37 *op = 0; 36 *op = 0;
38 return (op - ascii); 37 return (op - ascii);
39 } 38 }
40 39
41 int 40 int
42 get_joliet_filename(struct iso_directory_recor 41 get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, struct inode * inode)
43 { 42 {
>> 43 unsigned char utf8;
44 struct nls_table *nls; 44 struct nls_table *nls;
45 unsigned char len = 0; 45 unsigned char len = 0;
46 46
>> 47 utf8 = ISOFS_SB(inode->i_sb)->s_utf8;
47 nls = ISOFS_SB(inode->i_sb)->s_nls_ioc 48 nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset;
48 49
49 if (!nls) { !! 50 if (utf8) {
50 len = utf16s_to_utf8s((const w 51 len = utf16s_to_utf8s((const wchar_t *) de->name,
51 de->name_len[0 52 de->name_len[0] >> 1, UTF16_BIG_ENDIAN,
52 outname, PAGE_ 53 outname, PAGE_SIZE);
53 } else { 54 } else {
54 len = uni16_to_x8(outname, (__ 55 len = uni16_to_x8(outname, (__be16 *) de->name,
55 de->name_len[0 56 de->name_len[0] >> 1, nls);
56 } 57 }
57 if ((len > 2) && (outname[len-2] == '; 58 if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1'))
58 len -= 2; 59 len -= 2;
59 60
60 /* 61 /*
61 * Windows doesn't like periods at the 62 * Windows doesn't like periods at the end of a name,
62 * so neither do we 63 * so neither do we
63 */ 64 */
64 while (len >= 2 && (outname[len-1] == 65 while (len >= 2 && (outname[len-1] == '.'))
65 len--; 66 len--;
66 67
67 return len; 68 return len;
68 } 69 }
69 70
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