1/*-
2 * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
3 *		at Electronni Visti IA, Kiev, Ukraine.
4 *			All rights reserved.
5 *
6 * Copyright (c) 2011 The FreeBSD Foundation
7 * All rights reserved.
8 * Portions of this software were developed by David Chisnall
9 * under sponsorship from the FreeBSD Foundation.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: releng/10.2/lib/libc/string/strxfrm.c 227753 2011-11-20 14:45:42Z theraven $");
35
36#include <stdlib.h>
37#include <string.h>
38#include "collate.h"
39
40size_t
41strxfrm_l(char * __restrict dest, const char * __restrict src, size_t len, locale_t loc);
42size_t
43strxfrm(char * __restrict dest, const char * __restrict src, size_t len)
44{
45	return strxfrm_l(dest, src, len, __get_locale());
46}
47
48size_t
49strxfrm_l(char * __restrict dest, const char * __restrict src, size_t len, locale_t locale)
50{
51	int prim, sec, l;
52	size_t slen;
53	char *s, *ss;
54	FIX_LOCALE(locale);
55	struct xlocale_collate *table =
56		(struct xlocale_collate*)locale->components[XLC_COLLATE];
57
58	if (!*src) {
59		if (len > 0)
60			*dest = '\0';
61		return 0;
62	}
63
64	if (table->__collate_load_error)
65		return strlcpy(dest, src, len);
66
67	slen = 0;
68	prim = sec = 0;
69	ss = s = __collate_substitute(table, src);
70	while (*s) {
71		while (*s && !prim) {
72			__collate_lookup(table, s, &l, &prim, &sec);
73			s += l;
74		}
75		if (prim) {
76			if (len > 1) {
77				*dest++ = (char)prim;
78				len--;
79			}
80			slen++;
81			prim = 0;
82		}
83	}
84	free(ss);
85	if (len > 0)
86		*dest = '\0';
87
88	return slen;
89}
90