From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- fs/isofs/joliet.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 fs/isofs/joliet.c (limited to 'fs/isofs/joliet.c') diff --git a/fs/isofs/joliet.c b/fs/isofs/joliet.c new file mode 100644 index 0000000000..c0f04a1e7f --- /dev/null +++ b/fs/isofs/joliet.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * linux/fs/isofs/joliet.c + * + * (C) 1996 Gordon Chaffee + * + * Joliet: Microsoft's Unicode extensions to iso9660 + */ + +#include +#include +#include "isofs.h" + +/* + * Convert Unicode 16 to UTF-8 or ASCII. + */ +static int +uni16_to_x8(unsigned char *ascii, __be16 *uni, int len, struct nls_table *nls) +{ + __be16 *ip, ch; + unsigned char *op; + + ip = uni; + op = ascii; + + while ((ch = get_unaligned(ip)) && len) { + int llen; + llen = nls->uni2char(be16_to_cpu(ch), op, NLS_MAX_CHARSET_SIZE); + if (llen > 0) + op += llen; + else + *op++ = '?'; + ip++; + + len--; + } + *op = 0; + return (op - ascii); +} + +int +get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, struct inode * inode) +{ + struct nls_table *nls; + unsigned char len = 0; + + nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset; + + if (!nls) { + len = utf16s_to_utf8s((const wchar_t *) de->name, + de->name_len[0] >> 1, UTF16_BIG_ENDIAN, + outname, PAGE_SIZE); + } else { + len = uni16_to_x8(outname, (__be16 *) de->name, + de->name_len[0] >> 1, nls); + } + if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1')) + len -= 2; + + /* + * Windows doesn't like periods at the end of a name, + * so neither do we + */ + while (len >= 2 && (outname[len-1] == '.')) + len--; + + return len; +} -- cgit v1.2.3