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      1 /*	$NetBSD: ntfs_conv.c,v 1.10 2015/02/20 17:08:13 maxv Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 /*
     30  * File name recode stuff.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 __KERNEL_RCSID(0, "$NetBSD: ntfs_conv.c,v 1.10 2015/02/20 17:08:13 maxv Exp $");
     35 
     36 #include <sys/param.h>
     37 #include <sys/systm.h>
     38 #include <sys/namei.h>
     39 #include <sys/kernel.h>
     40 #include <sys/mount.h>
     41 #include <sys/malloc.h>
     42 
     43 #include <fs/ntfs/ntfs.h>
     44 #include <fs/ntfs/ntfs_inode.h>
     45 #include <fs/ntfs/ntfs_subr.h>
     46 
     47 /* UTF-8 encoding stuff */
     48 #include <fs/unicode.h>
     49 
     50 /*
     51  * Read one wide character off the string, shift the string pointer
     52  * and return the character.
     53  */
     54 wchar
     55 ntfs_utf8_wget(const char **str, size_t *sz)
     56 {
     57 	return (wchar) wget_utf8(str, sz);
     58 }
     59 
     60 /*
     61  * Encode wide character and write it to the string. 'n' specifies
     62  * how much space there is in the string. Returns number of bytes written
     63  * to the target string.
     64  */
     65 int
     66 ntfs_utf8_wput(char *s, size_t n, wchar wc)
     67 {
     68 	return wput_utf8(s, n, (u_int16_t) wc);
     69 }
     70 
     71 /*
     72  * Compare two wide characters, returning 1, 0, -1 if the first is
     73  * bigger, equal or lower than the second.
     74  */
     75 int
     76 ntfs_utf8_wcmp(wchar wc1, wchar wc2)
     77 {
     78 	/* no conversions needed for utf8 */
     79 
     80 	if (wc1 == wc2)
     81 		return 0;
     82 	else
     83 		return (int) wc1 - (int) wc2;
     84 }
     85