2 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
3 * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
4 * at Electronni Visti IA, Kiev, Ukraine.
7 * Copyright (c) 2011 The FreeBSD Foundation
9 * Portions of this software were developed by David Chisnall
10 * under sponsorship from the FreeBSD Foundation.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
45 * In order to properly handle multibyte locales, its easiest to just
46 * convert to wide characters and then use wcscoll. However if an
47 * error occurs, we gracefully fall back to simple strcmp. Caller
51 strcoll_l(const char *s, const char *s2, locale_t locale)
54 wchar_t *t1 = NULL, *t2 = NULL;
55 wchar_t *w1 = NULL, *w2 = NULL;
56 const char *cs1, *cs2;
61 memset(&mbs1, 0, sizeof (mbstate_t));
62 memset(&mbs2, 0, sizeof (mbstate_t));
65 * The mbsrtowcs_l function can set the src pointer to null upon
66 * failure, so it should act on a copy to avoid:
67 * - sending null pointer to strcmp
68 * - having strcoll/strcoll_l change *s or *s2 to null
74 struct xlocale_collate *table =
75 (struct xlocale_collate*)locale->components[XLC_COLLATE];
77 if (table->__collate_load_error)
84 * Simple assumption: conversion to wide format is strictly
85 * reducing, i.e. a single byte (or multibyte character)
86 * cannot result in multiple wide characters.
88 if ((t1 = malloc(sz1 * sizeof (wchar_t))) == NULL)
91 if ((t2 = malloc(sz2 * sizeof (wchar_t))) == NULL)
95 if ((mbsrtowcs_l(w1, &cs1, sz1, &mbs1, locale)) == (size_t)-1)
98 if ((mbsrtowcs_l(w2, &cs2, sz2, &mbs2, locale)) == (size_t)-1)
101 ret = wcscoll_l(w1, w2, locale);
110 return (strcmp(s, s2));
114 strcoll(const char *s, const char *s2)
116 return strcoll_l(s, s2, __get_locale());