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/string.h>
11 #include <linux/nls.h> 10 #include <linux/nls.h>
12 #include "isofs.h" !! 11 #include <linux/slab.h>
>> 12 #include <linux/iso_fs.h>
>> 13 #include <asm/unaligned.h>
13 14
14 /* 15 /*
15 * Convert Unicode 16 to UTF-8 or ASCII. !! 16 * Convert Unicode 16 to UTF8 or ASCII.
16 */ 17 */
17 static int 18 static int
18 uni16_to_x8(unsigned char *ascii, __be16 *uni, !! 19 uni16_to_x8(unsigned char *ascii, u16 *uni, int len, struct nls_table *nls)
19 { 20 {
20 __be16 *ip, ch; !! 21 wchar_t *ip, ch;
21 unsigned char *op; 22 unsigned char *op;
22 23
23 ip = uni; 24 ip = uni;
24 op = ascii; 25 op = ascii;
25 26
26 while ((ch = get_unaligned(ip)) && len 27 while ((ch = get_unaligned(ip)) && len) {
27 int llen; 28 int llen;
28 llen = nls->uni2char(be16_to_c !! 29 ch = be16_to_cpu(ch);
29 if (llen > 0) !! 30 if ((llen = nls->uni2char(ch, op, NLS_MAX_CHARSET_SIZE)) > 0)
30 op += llen; 31 op += llen;
31 else 32 else
32 *op++ = '?'; 33 *op++ = '?';
33 ip++; 34 ip++;
34 35
35 len--; 36 len--;
36 } 37 }
37 *op = 0; 38 *op = 0;
38 return (op - ascii); 39 return (op - ascii);
39 } 40 }
40 41
>> 42 /* Convert big endian wide character string to utf8 */
>> 43 static int
>> 44 wcsntombs_be(__u8 *s, const __u8 *pwcs, int inlen, int maxlen)
>> 45 {
>> 46 const __u8 *ip;
>> 47 __u8 *op;
>> 48 int size;
>> 49 __u16 c;
>> 50
>> 51 op = s;
>> 52 ip = pwcs;
>> 53 while ((*ip || ip[1]) && (maxlen > 0) && (inlen > 0)) {
>> 54 c = (*ip << 8) | ip[1];
>> 55 if (c > 0x7f) {
>> 56 size = utf8_wctomb(op, c, maxlen);
>> 57 if (size == -1) {
>> 58 /* Ignore character and move on */
>> 59 maxlen--;
>> 60 } else {
>> 61 op += size;
>> 62 maxlen -= size;
>> 63 }
>> 64 } else {
>> 65 *op++ = (__u8) c;
>> 66 }
>> 67 ip += 2;
>> 68 inlen--;
>> 69 }
>> 70 return (op - s);
>> 71 }
>> 72
41 int 73 int
42 get_joliet_filename(struct iso_directory_recor 74 get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, struct inode * inode)
43 { 75 {
>> 76 unsigned char utf8;
44 struct nls_table *nls; 77 struct nls_table *nls;
45 unsigned char len = 0; 78 unsigned char len = 0;
46 79
47 nls = ISOFS_SB(inode->i_sb)->s_nls_ioc !! 80 utf8 = inode->i_sb->u.isofs_sb.s_utf8;
>> 81 nls = inode->i_sb->u.isofs_sb.s_nls_iocharset;
48 82
49 if (!nls) { !! 83 if (utf8) {
50 len = utf16s_to_utf8s((const w !! 84 len = wcsntombs_be(outname, de->name,
51 de->name_len[0 !! 85 de->name_len[0] >> 1, PAGE_SIZE);
52 outname, PAGE_ <<
53 } else { 86 } else {
54 len = uni16_to_x8(outname, (__ !! 87 len = uni16_to_x8(outname, (u16 *) de->name,
55 de->name_len[0 !! 88 de->name_len[0] >> 1, nls);
56 } 89 }
57 if ((len > 2) && (outname[len-2] == '; !! 90 if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1')) {
58 len -= 2; 91 len -= 2;
>> 92 }
59 93
60 /* 94 /*
61 * Windows doesn't like periods at the 95 * Windows doesn't like periods at the end of a name,
62 * so neither do we 96 * so neither do we
63 */ 97 */
64 while (len >= 2 && (outname[len-1] == !! 98 while (len >= 2 && (outname[len-1] == '.')) {
65 len--; 99 len--;
>> 100 }
66 101
67 return len; 102 return len;
68 } 103 }
69 104
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