root/fs/cifs/cifs_unicode.c

DEFINITIONS

1. cifs_strfromUCS_le
2. cifs_strtoUCS

/*
 *   fs/cifs/cifs_unicode.c
 *
 *   Copyright (c) International Business Machines  Corp., 2000,2005
 *   Modified by Steve French (sfrench@us.ibm.com)
 *
 *   This program is free software;  you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program;  if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
#include <linux/fs.h>
#include "cifs_unicode.h"
#include "cifs_uniupr.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifs_debug.h"

/*
 * NAME:        cifs_strfromUCS()
 *
 * FUNCTION:    Convert little-endian unicode string to character string
 *
 */
int
cifs_strfromUCS_le(char *to, const __le16 *from,
                   int len, const struct nls_table *codepage)
{
        int i;
        int outlen = 0;

        for (i = 0; (i < len) && from[i]; i++) {
                int charlen;
                /* 2.4.0 kernel or greater */
                charlen =
                    codepage->uni2char(le16_to_cpu(from[i]), &to[outlen],
                                       NLS_MAX_CHARSET_SIZE);
                if (charlen > 0) {
                        outlen += charlen;
                } else {
                        to[outlen++] = '?';
                }
        }
        to[outlen] = 0;
        return outlen;
}

/*
 * NAME:        cifs_strtoUCS()
 *
 * FUNCTION:    Convert character string to unicode string
 *
 */
int
cifs_strtoUCS(__le16 *to, const char *from, int len,
              const struct nls_table *codepage)
{
        int charlen;
        int i;
        wchar_t *wchar_to = (wchar_t *)to; /* needed to quiet sparse */

        for (i = 0; len && *from; i++, from += charlen, len -= charlen) {

                /* works for 2.4.0 kernel or later */
                charlen = codepage->char2uni(from, len, &wchar_to[i]);
                if (charlen < 1) {
                        cERROR(1,
                               ("strtoUCS: char2uni of %d returned %d",
                                (int)*from, charlen));
                        /* A question mark */
                        to[i] = cpu_to_le16(0x003f);
                        charlen = 1;
                } else
                        to[i] = cpu_to_le16(wchar_to[i]);

        }

        to[i] = 0;
        return i;
}