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ntfs_conv.c revision 1.5.4.2 
      1 /*	$NetBSD: ntfs_conv.c,v 1.5.4.2 2008/02/04 09:23:47 yamt 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  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the NetBSD
     18  *	Foundation, Inc. and its contributors.
     19  * 4. Neither the name of The NetBSD Foundation nor the names of its
     20  *    contributors may be used to endorse or promote products derived
     21  *    from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33  * POSSIBILITY OF SUCH DAMAGE.
     34  */
     35 
     36 /*
     37  * File name recode stuff.
     38  */
     39 
     40 #include <sys/cdefs.h>
     41 __KERNEL_RCSID(0, "$NetBSD: ntfs_conv.c,v 1.5.4.2 2008/02/04 09:23:47 yamt Exp $");
     42 
     43 #include <sys/param.h>
     44 #include <sys/systm.h>
     45 #include <sys/namei.h>
     46 #include <sys/proc.h>
     47 #include <sys/kernel.h>
     48 #include <sys/vnode.h>
     49 #include <sys/mount.h>
     50 #include <sys/buf.h>
     51 #include <sys/file.h>
     52 #include <sys/malloc.h>
     53 #include <sys/lock.h>
     54 
     55 #include <miscfs/specfs/specdev.h>
     56 
     57 #include <fs/ntfs/ntfs.h>
     58 #include <fs/ntfs/ntfsmount.h>
     59 #include <fs/ntfs/ntfs_inode.h>
     60 #include <fs/ntfs/ntfs_vfsops.h>
     61 #include <fs/ntfs/ntfs_subr.h>
     62 #include <fs/ntfs/ntfs_compr.h>
     63 #include <fs/ntfs/ntfs_ihash.h>
     64 
     65 /* UTF-8 encoding stuff */
     66 #include <fs/unicode.h>
     67 
     68 /*
     69  * Read one wide character off the string, shift the string pointer
     70  * and return the character.
     71  */
     72 wchar
     73 ntfs_utf8_wget(const char **str, size_t *sz)
     74 {
     75 	return (wchar) wget_utf8(str, sz);
     76 }
     77 
     78 /*
     79  * Encode wide character and write it to the string. 'n' specifies
     80  * how much space there is in the string. Returns number of bytes written
     81  * to the target string.
     82  */
     83 int
     84 ntfs_utf8_wput(char *s, size_t n, wchar wc)
     85 {
     86 	return wput_utf8(s, n, (u_int16_t) wc);
     87 }
     88 
     89 /*
     90  * Compare two wide characters, returning 1, 0, -1 if the first is
     91  * bigger, equal or lower than the second.
     92  */
     93 int
     94 ntfs_utf8_wcmp(wchar wc1, wchar wc2)
     95 {
     96 	/* no conversions needed for utf8 */
     97 
     98 	if (wc1 == wc2)
     99 		return 0;
    100 	else
    101 		return (int) wc1 - (int) wc2;
    102 }
    103