1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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 *
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 <stdlib.h>
37 #include <string.h>
38 #include <errno.h>
39 #include <wchar.h>
40 #include "collate.h"
41
42 size_t
43 strxfrm_l(char * __restrict dest, const char * __restrict src, size_t len, locale_t loc);
44 size_t
strxfrm(char * __restrict dest,const char * __restrict src,size_t len)45 strxfrm(char * __restrict dest, const char * __restrict src, size_t len)
46 {
47 return strxfrm_l(dest, src, len, __get_locale());
48 }
49
50 size_t
strxfrm_l(char * __restrict dest,const char * __restrict src,size_t len,locale_t locale)51 strxfrm_l(char * __restrict dest, const char * __restrict src, size_t len, locale_t locale)
52 {
53 size_t slen;
54 size_t xlen;
55 wchar_t *wcs = NULL;
56
57 FIX_LOCALE(locale);
58 struct xlocale_collate *table =
59 (struct xlocale_collate*)locale->components[XLC_COLLATE];
60
61 if (!*src) {
62 if (len > 0)
63 *dest = '\0';
64 return (0);
65 }
66
67 /*
68 * The conversion from multibyte to wide character strings is
69 * strictly reducing (one byte of an mbs cannot expand to more
70 * than one wide character.)
71 */
72 slen = strlen(src);
73
74 if (table->__collate_load_error)
75 goto error;
76
77 if ((wcs = malloc((slen + 1) * sizeof (wchar_t))) == NULL)
78 goto error;
79
80 if (mbstowcs_l(wcs, src, slen + 1, locale) == (size_t)-1)
81 goto error;
82
83 if ((xlen = _collate_sxfrm(table, wcs, dest, len)) == (size_t)-1)
84 goto error;
85
86 free(wcs);
87
88 if (len > xlen) {
89 dest[xlen] = 0;
90 } else if (len) {
91 dest[len-1] = 0;
92 }
93
94 return (xlen);
95
96 error:
97 /* errno should be set to ENOMEM if malloc failed */
98 free(wcs);
99 strlcpy(dest, src, len);
100
101 return (slen);
102 }
103