Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *  linux/fs/isofs/joliet.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *  (C) 1996 Gordon Chaffee
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *  Joliet: Microsoft's Unicode extensions to iso9660
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/nls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "isofs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  * Convert Unicode 16 to UTF-8 or ASCII.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) uni16_to_x8(unsigned char *ascii, __be16 *uni, int len, struct nls_table *nls)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	__be16 *ip, ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	unsigned char *op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	ip = uni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	op = ascii;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	while ((ch = get_unaligned(ip)) && len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		int llen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		llen = nls->uni2char(be16_to_cpu(ch), op, NLS_MAX_CHARSET_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		if (llen > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 			op += llen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 			*op++ = '?';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		ip++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		len--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	*op = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	return (op - ascii);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, struct inode * inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	struct nls_table *nls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	unsigned char len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	if (!nls) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		len = utf16s_to_utf8s((const wchar_t *) de->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 				de->name_len[0] >> 1, UTF16_BIG_ENDIAN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 				outname, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		len = uni16_to_x8(outname, (__be16 *) de->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 				de->name_len[0] >> 1, nls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1'))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		len -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	 * Windows doesn't like periods at the end of a name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	 * so neither do we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	while (len >= 2 && (outname[len-1] == '.'))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 		len--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }