Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/isofs/joliet.c | |
3 | * | |
4 | * (C) 1996 Gordon Chaffee | |
5 | * | |
6 | * Joliet: Microsoft's Unicode extensions to iso9660 | |
7 | */ | |
8 | ||
94f2f715 | 9 | #include <linux/types.h> |
1da177e4 | 10 | #include <linux/nls.h> |
94f2f715 | 11 | #include "isofs.h" |
1da177e4 LT |
12 | |
13 | /* | |
4de151d8 | 14 | * Convert Unicode 16 to UTF-8 or ASCII. |
1da177e4 LT |
15 | */ |
16 | static int | |
d02d48d8 | 17 | uni16_to_x8(unsigned char *ascii, __be16 *uni, int len, struct nls_table *nls) |
1da177e4 | 18 | { |
d02d48d8 | 19 | __be16 *ip, ch; |
1da177e4 LT |
20 | unsigned char *op; |
21 | ||
22 | ip = uni; | |
23 | op = ascii; | |
24 | ||
25 | while ((ch = get_unaligned(ip)) && len) { | |
26 | int llen; | |
d02d48d8 AV |
27 | llen = nls->uni2char(be16_to_cpu(ch), op, NLS_MAX_CHARSET_SIZE); |
28 | if (llen > 0) | |
1da177e4 LT |
29 | op += llen; |
30 | else | |
31 | *op++ = '?'; | |
32 | ip++; | |
33 | ||
34 | len--; | |
35 | } | |
36 | *op = 0; | |
37 | return (op - ascii); | |
38 | } | |
39 | ||
40 | /* Convert big endian wide character string to utf8 */ | |
41 | static int | |
42 | wcsntombs_be(__u8 *s, const __u8 *pwcs, int inlen, int maxlen) | |
43 | { | |
44 | const __u8 *ip; | |
45 | __u8 *op; | |
46 | int size; | |
47 | __u16 c; | |
48 | ||
49 | op = s; | |
50 | ip = pwcs; | |
51 | while ((*ip || ip[1]) && (maxlen > 0) && (inlen > 0)) { | |
52 | c = (*ip << 8) | ip[1]; | |
53 | if (c > 0x7f) { | |
54 | size = utf8_wctomb(op, c, maxlen); | |
55 | if (size == -1) { | |
56 | /* Ignore character and move on */ | |
57 | maxlen--; | |
58 | } else { | |
59 | op += size; | |
60 | maxlen -= size; | |
61 | } | |
62 | } else { | |
63 | *op++ = (__u8) c; | |
64 | } | |
65 | ip += 2; | |
66 | inlen--; | |
67 | } | |
68 | return (op - s); | |
69 | } | |
70 | ||
71 | int | |
72 | get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, struct inode * inode) | |
73 | { | |
74 | unsigned char utf8; | |
75 | struct nls_table *nls; | |
76 | unsigned char len = 0; | |
77 | ||
78 | utf8 = ISOFS_SB(inode->i_sb)->s_utf8; | |
79 | nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset; | |
80 | ||
81 | if (utf8) { | |
82 | len = wcsntombs_be(outname, de->name, | |
c3ed85a3 | 83 | de->name_len[0] >> 1, PAGE_SIZE); |
1da177e4 | 84 | } else { |
d02d48d8 | 85 | len = uni16_to_x8(outname, (__be16 *) de->name, |
c3ed85a3 | 86 | de->name_len[0] >> 1, nls); |
1da177e4 | 87 | } |
c3ed85a3 | 88 | if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1')) |
1da177e4 | 89 | len -= 2; |
1da177e4 LT |
90 | |
91 | /* | |
92 | * Windows doesn't like periods at the end of a name, | |
93 | * so neither do we | |
94 | */ | |
c3ed85a3 | 95 | while (len >= 2 && (outname[len-1] == '.')) |
1da177e4 | 96 | len--; |
1da177e4 LT |
97 | |
98 | return len; | |
99 | } |