blob: a048de81c09318ae5ccd092f5675649a50a7025b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/isofs/joliet.c
3 *
4 * (C) 1996 Gordon Chaffee
5 *
6 * Joliet: Microsoft's Unicode extensions to iso9660
7 */
8
Al Viro94f2f712005-04-25 18:32:12 -07009#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/nls.h>
Al Viro94f2f712005-04-25 18:32:12 -070011#include "isofs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
13/*
Alexey Dobriyan4de151d2006-03-22 00:13:35 +010014 * Convert Unicode 16 to UTF-8 or ASCII.
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 */
16static int
Al Virod02d48d2005-12-24 14:33:09 -050017uni16_to_x8(unsigned char *ascii, __be16 *uni, int len, struct nls_table *nls)
Linus Torvalds1da177e2005-04-16 15:20:36 -070018{
Al Virod02d48d2005-12-24 14:33:09 -050019 __be16 *ip, ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 unsigned char *op;
21
22 ip = uni;
23 op = ascii;
24
25 while ((ch = get_unaligned(ip)) && len) {
26 int llen;
Al Virod02d48d2005-12-24 14:33:09 -050027 llen = nls->uni2char(be16_to_cpu(ch), op, NLS_MAX_CHARSET_SIZE);
28 if (llen > 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070029 op += llen;
30 else
31 *op++ = '?';
32 ip++;
33
34 len--;
35 }
36 *op = 0;
37 return (op - ascii);
38}
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040int
41get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, struct inode * inode)
42{
43 unsigned char utf8;
44 struct nls_table *nls;
45 unsigned char len = 0;
46
47 utf8 = ISOFS_SB(inode->i_sb)->s_utf8;
48 nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset;
49
50 if (utf8) {
Alan Stern74675a52009-04-30 10:08:18 -040051 len = utf16s_to_utf8s((const wchar_t *) de->name,
52 de->name_len[0] >> 1, UTF16_BIG_ENDIAN,
53 outname, PAGE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 } else {
Al Virod02d48d2005-12-24 14:33:09 -050055 len = uni16_to_x8(outname, (__be16 *) de->name,
Dave Jonesc3ed85a2007-07-15 23:40:03 -070056 de->name_len[0] >> 1, nls);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 }
Dave Jonesc3ed85a2007-07-15 23:40:03 -070058 if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1'))
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 len -= 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
61 /*
62 * Windows doesn't like periods at the end of a name,
63 * so neither do we
64 */
Dave Jonesc3ed85a2007-07-15 23:40:03 -070065 while (len >= 2 && (outname[len-1] == '.'))
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 len--;
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
68 return len;
69}