VisionFive2 Linux kernel

b24413180f560 (Greg Kroah-Hartman 2017-11-01 15:07:57 +0100  1) // SPDX-License-Identifier: GPL-2.0
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  2) /*
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  3)  *  linux/fs/isofs/joliet.c
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  4)  *
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  5)  *  (C) 1996 Gordon Chaffee
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  6)  *
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  7)  *  Joliet: Microsoft's Unicode extensions to iso9660
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  8)  */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  9) 
94f2f715771d0 (Al Viro            2005-04-25 18:32:12 -0700 10) #include <linux/types.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 11) #include <linux/nls.h>
94f2f715771d0 (Al Viro            2005-04-25 18:32:12 -0700 12) #include "isofs.h"
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 13) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 14) /*
4de151d8cd255 (Alexey Dobriyan    2006-03-22 00:13:35 +0100 15)  * Convert Unicode 16 to UTF-8 or ASCII.
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 16)  */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 17) static int
d02d48d8650bf (Al Viro            2005-12-24 14:33:09 -0500 18) uni16_to_x8(unsigned char *ascii, __be16 *uni, int len, struct nls_table *nls)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 19) {
d02d48d8650bf (Al Viro            2005-12-24 14:33:09 -0500 20) 	__be16 *ip, ch;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 21) 	unsigned char *op;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 22) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 23) 	ip = uni;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 24) 	op = ascii;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 25) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 26) 	while ((ch = get_unaligned(ip)) && len) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 27) 		int llen;
d02d48d8650bf (Al Viro            2005-12-24 14:33:09 -0500 28) 		llen = nls->uni2char(be16_to_cpu(ch), op, NLS_MAX_CHARSET_SIZE);
d02d48d8650bf (Al Viro            2005-12-24 14:33:09 -0500 29) 		if (llen > 0)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 30) 			op += llen;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 31) 		else
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 32) 			*op++ = '?';
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 33) 		ip++;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 34) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 35) 		len--;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 36) 	}
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 37) 	*op = 0;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 38) 	return (op - ascii);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 39) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 40) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 41) int
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 42) get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, struct inode * inode)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 43) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 44) 	unsigned char utf8;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 45) 	struct nls_table *nls;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 46) 	unsigned char len = 0;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 47) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 48) 	utf8 = ISOFS_SB(inode->i_sb)->s_utf8;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 49) 	nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 50) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 51) 	if (utf8) {
74675a58507e7 (Alan Stern         2009-04-30 10:08:18 -0400 52) 		len = utf16s_to_utf8s((const wchar_t *) de->name,
74675a58507e7 (Alan Stern         2009-04-30 10:08:18 -0400 53) 				de->name_len[0] >> 1, UTF16_BIG_ENDIAN,
74675a58507e7 (Alan Stern         2009-04-30 10:08:18 -0400 54) 				outname, PAGE_SIZE);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 55) 	} else {
d02d48d8650bf (Al Viro            2005-12-24 14:33:09 -0500 56) 		len = uni16_to_x8(outname, (__be16 *) de->name,
c3ed85a36ff5b (Dave Jones         2007-07-15 23:40:03 -0700 57) 				de->name_len[0] >> 1, nls);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 58) 	}
c3ed85a36ff5b (Dave Jones         2007-07-15 23:40:03 -0700 59) 	if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1'))
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 60) 		len -= 2;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 61) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 62) 	/*
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 63) 	 * Windows doesn't like periods at the end of a name,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 64) 	 * so neither do we
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 65) 	 */
c3ed85a36ff5b (Dave Jones         2007-07-15 23:40:03 -0700 66) 	while (len >= 2 && (outname[len-1] == '.'))
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 67) 		len--;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 68) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 69) 	return len;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 70) }