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