1 /*
2 * fs/cifs/cifs_unicode.c
3 *
4 * Copyright (c) International Business Machines Corp., 2000,2005
5 * Modified by Steve French (sfrench@us.ibm.com)
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21 #include <linux/fs.h>
22 #include "cifs_unicode.h"
23 #include "cifs_uniupr.h"
24 #include "cifspdu.h"
25 #include "cifsglob.h"
26 #include "cifs_debug.h"
27
28 /*
29 * NAME: cifs_strfromUCS()
30 *
31 * FUNCTION: Convert little-endian unicode string to character string
32 *
33 */
34 int
cifs_strfromUCS_le(char * to,const __le16 * from,int len,const struct nls_table * codepage)35 cifs_strfromUCS_le(char *to, const __le16 *from,
36 int len, const struct nls_table *codepage)
37 {
38 int i;
39 int outlen = 0;
40
41 for (i = 0; (i < len) && from[i]; i++) {
42 int charlen;
43 /* 2.4.0 kernel or greater */
44 charlen =
45 codepage->uni2char(le16_to_cpu(from[i]), &to[outlen],
46 NLS_MAX_CHARSET_SIZE);
47 if (charlen > 0) {
48 outlen += charlen;
49 } else {
50 to[outlen++] = '?';
51 }
52 }
53 to[outlen] = 0;
54 return outlen;
55 }
56
57 /*
58 * NAME: cifs_strtoUCS()
59 *
60 * FUNCTION: Convert character string to unicode string
61 *
62 */
63 int
cifs_strtoUCS(__le16 * to,const char * from,int len,const struct nls_table * codepage)64 cifs_strtoUCS(__le16 *to, const char *from, int len,
65 const struct nls_table *codepage)
66 {
67 int charlen;
68 int i;
69 wchar_t *wchar_to = (wchar_t *)to; /* needed to quiet sparse */
70
71 for (i = 0; len && *from; i++, from += charlen, len -= charlen) {
72
73 /* works for 2.4.0 kernel or later */
74 charlen = codepage->char2uni(from, len, &wchar_to[i]);
75 if (charlen < 1) {
76 cERROR(1,
77 ("strtoUCS: char2uni of %d returned %d",
78 (int)*from, charlen));
79 /* A question mark */
80 to[i] = cpu_to_le16(0x003f);
81 charlen = 1;
82 } else
83 to[i] = cpu_to_le16(wchar_to[i]);
84
85 }
86
87 to[i] = 0;
88 return i;
89 }
90
91