| 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 | */ |
| 16 | static int |
| 17 | uni16_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 | |
| 40 | int |
| 41 | get_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 | } |