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68 lines
1.3 KiB
68 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/fs/isofs/joliet.c |
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* |
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* (C) 1996 Gordon Chaffee |
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* |
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* Joliet: Microsoft's Unicode extensions to iso9660 |
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*/ |
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#include <linux/types.h> |
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#include <linux/nls.h> |
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#include "isofs.h" |
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/* |
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* Convert Unicode 16 to UTF-8 or ASCII. |
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*/ |
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static int |
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uni16_to_x8(unsigned char *ascii, __be16 *uni, int len, struct nls_table *nls) |
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{ |
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__be16 *ip, ch; |
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unsigned char *op; |
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ip = uni; |
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op = ascii; |
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while ((ch = get_unaligned(ip)) && len) { |
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int llen; |
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llen = nls->uni2char(be16_to_cpu(ch), op, NLS_MAX_CHARSET_SIZE); |
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if (llen > 0) |
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op += llen; |
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else |
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*op++ = '?'; |
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ip++; |
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len--; |
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} |
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*op = 0; |
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return (op - ascii); |
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} |
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int |
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get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, struct inode * inode) |
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{ |
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struct nls_table *nls; |
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unsigned char len = 0; |
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nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset; |
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if (!nls) { |
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len = utf16s_to_utf8s((const wchar_t *) de->name, |
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de->name_len[0] >> 1, UTF16_BIG_ENDIAN, |
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outname, PAGE_SIZE); |
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} else { |
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len = uni16_to_x8(outname, (__be16 *) de->name, |
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de->name_len[0] >> 1, nls); |
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} |
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if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1')) |
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len -= 2; |
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/* |
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* Windows doesn't like periods at the end of a name, |
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* so neither do we |
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*/ |
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while (len >= 2 && (outname[len-1] == '.')) |
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len--; |
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return len; |
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}
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