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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/cifs_unicode.c
3 *
Steve Frenche89dc922005-11-11 15:18:19 -08004 * Copyright (c) International Business Machines Corp., 2000,2005
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * 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
Steve French221601c2007-06-05 20:35:06 +00009 * the Free Software Foundation; either version 2 of the License, or
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * (at your option) any later version.
Steve French221601c2007-06-05 20:35:06 +000011 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 * 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
Steve French221601c2007-06-05 20:35:06 +000018 * along with this program; if not, write to the Free Software
Linus Torvalds1da177e2005-04-16 15:20:36 -070019 * 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"
Steve French39798772006-05-31 22:40:51 +000025#include "cifsglob.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "cifs_debug.h"
27
28/*
29 * NAME: cifs_strfromUCS()
30 *
31 * FUNCTION: Convert little-endian unicode string to character string
32 *
33 */
34int
Steve French221601c2007-06-05 20:35:06 +000035cifs_strfromUCS_le(char *to, const __le16 * from,
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 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 */
63int
Steve Frenche89dc922005-11-11 15:18:19 -080064cifs_strtoUCS(__le16 * to, const char *from, int len,
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 const struct nls_table *codepage)
66{
67 int charlen;
68 int i;
Steve French221601c2007-06-05 20:35:06 +000069 wchar_t * wchar_to = (wchar_t *)to; /* needed to quiet sparse */
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
71 for (i = 0; len && *from; i++, from += charlen, len -= charlen) {
72
73 /* works for 2.4.0 kernel or later */
Steve Frenche89dc922005-11-11 15:18:19 -080074 charlen = codepage->char2uni(from, len, &wchar_to[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 if (charlen < 1) {
76 cERROR(1,
Steve French3a9f4622007-04-04 17:10:24 +000077 ("strtoUCS: char2uni of %d returned %d",
78 (int)*from, charlen));
Steve French69114082005-11-10 19:28:44 -080079 /* A question mark */
Steve Frenche89dc922005-11-11 15:18:19 -080080 to[i] = cpu_to_le16(0x003f);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 charlen = 1;
Steve French221601c2007-06-05 20:35:06 +000082 } else
Steve Frenche89dc922005-11-11 15:18:19 -080083 to[i] = cpu_to_le16(wchar_to[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
85 }
86
87 to[i] = 0;
88 return i;
89}
90