wcsxfrm.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
5 * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
6 *		at Electronni Visti IA, Kiev, Ukraine.
7 *			All rights reserved.
8 *
9 * Copyright (c) 2011 The FreeBSD Foundation
10 * All rights reserved.
11 * Portions of this software were developed by David Chisnall
12 * under sponsorship from the FreeBSD Foundation.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 *    notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 *    notice, this list of conditions and the following disclaimer in the
21 *    documentation and/or other materials provided with the distribution.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <sys/cdefs.h>
37__FBSDID("$FreeBSD: stable/11/lib/libc/string/wcsxfrm.c 330897 2018-03-14 03:19:51Z eadler $");
38
39#include <stdlib.h>
40#include <string.h>
41#include <wchar.h>
42#include "collate.h"
43
44size_t
45wcsxfrm_l(wchar_t * __restrict dest, const wchar_t * __restrict src, size_t len, locale_t locale)
46{
47	size_t slen;
48	FIX_LOCALE(locale);
49	struct xlocale_collate *table =
50		(struct xlocale_collate*)locale->components[XLC_COLLATE];
51
52	if (*src == L'\0') {
53		if (len != 0)
54			*dest = L'\0';
55		return (0);
56	}
57
58	if ((table->__collate_load_error) ||
59	    ((slen = _collate_wxfrm(table, src, dest, len)) == (size_t)-1)) {
60		goto error;
61	}
62
63	/* Add null termination at the correct location. */
64	if (len > slen) {
65		dest[slen] = 0;
66	} else if (len) {
67		dest[len-1] = 0;
68	}
69
70	return (slen);
71
72error:
73	slen = wcslen(src);
74	if (slen < len)
75		(void) wcscpy(dest, src);
76	else {
77		(void) wcsncpy(dest, src, len - 1);
78		dest[len - 1] = L'\0';
79	}
80	return (slen);
81}
82
83size_t
84wcsxfrm(wchar_t * __restrict dest, const wchar_t * __restrict src, size_t len)
85{
86	return wcsxfrm_l(dest, src, len, __get_locale());
87}
88