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