2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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.
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.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
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.
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
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
47 * In order to properly handle multibyte locales, its easiest to just
48 * convert to wide characters and then use wcscoll. However if an
49 * error occurs, we gracefully fall back to simple strcmp. Caller
53 strcoll_l(const char *s, const char *s2, locale_t locale)
56 wchar_t *t1 = NULL, *t2 = NULL;
57 wchar_t *w1 = NULL, *w2 = NULL;
58 const char *cs1, *cs2;
63 memset(&mbs1, 0, sizeof (mbstate_t));
64 memset(&mbs2, 0, sizeof (mbstate_t));
67 * The mbsrtowcs_l function can set the src pointer to null upon
68 * failure, so it should act on a copy to avoid:
69 * - sending null pointer to strcmp
70 * - having strcoll/strcoll_l change *s or *s2 to null
76 struct xlocale_collate *table =
77 (struct xlocale_collate*)locale->components[XLC_COLLATE];
79 if (table->__collate_load_error)
86 * Simple assumption: conversion to wide format is strictly
87 * reducing, i.e. a single byte (or multibyte character)
88 * cannot result in multiple wide characters.
90 if ((t1 = malloc(sz1 * sizeof (wchar_t))) == NULL)
93 if ((t2 = malloc(sz2 * sizeof (wchar_t))) == NULL)
97 if ((mbsrtowcs_l(w1, &cs1, sz1, &mbs1, locale)) == (size_t)-1)
100 if ((mbsrtowcs_l(w2, &cs2, sz2, &mbs2, locale)) == (size_t)-1)
103 ret = wcscoll_l(w1, w2, locale);
112 return (strcmp(s, s2));
116 strcoll(const char *s, const char *s2)
118 return strcoll_l(s, s2, __get_locale());