ia64/linux-2.6.18-xen.hg

view fs/isofs/joliet.c @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
1 /*
2 * linux/fs/isofs/joliet.c
3 *
4 * (C) 1996 Gordon Chaffee
5 *
6 * Joliet: Microsoft's Unicode extensions to iso9660
7 */
9 #include <linux/types.h>
10 #include <linux/nls.h>
11 #include "isofs.h"
13 /*
14 * Convert Unicode 16 to UTF-8 or ASCII.
15 */
16 static int
17 uni16_to_x8(unsigned char *ascii, u16 *uni, int len, struct nls_table *nls)
18 {
19 wchar_t *ip, ch;
20 unsigned char *op;
22 ip = uni;
23 op = ascii;
25 while ((ch = get_unaligned(ip)) && len) {
26 int llen;
27 ch = be16_to_cpu(ch);
28 if ((llen = nls->uni2char(ch, op, NLS_MAX_CHARSET_SIZE)) > 0)
29 op += llen;
30 else
31 *op++ = '?';
32 ip++;
34 len--;
35 }
36 *op = 0;
37 return (op - ascii);
38 }
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;
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 }
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;
78 utf8 = ISOFS_SB(inode->i_sb)->s_utf8;
79 nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset;
81 if (utf8) {
82 len = wcsntombs_be(outname, de->name,
83 de->name_len[0] >> 1, PAGE_SIZE);
84 } else {
85 len = uni16_to_x8(outname, (u16 *) de->name,
86 de->name_len[0] >> 1, nls);
87 }
88 if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1')) {
89 len -= 2;
90 }
92 /*
93 * Windows doesn't like periods at the end of a name,
94 * so neither do we
95 */
96 while (len >= 2 && (outname[len-1] == '.')) {
97 len--;
98 }
100 return len;
101 }