wctrans.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2002 Tim J. Robbins.
5 * All rights reserved.
6 *
7 * Copyright (c) 2011 The FreeBSD Foundation
8 * All rights reserved.
9 * Portions of this software were developed by David Chisnall
10 * under sponsorship from the FreeBSD Foundation.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
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.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: stable/11/lib/libc/locale/wctrans.c 330897 2018-03-14 03:19:51Z eadler $");
36
37#include <errno.h>
38#include <string.h>
39#include <wctype.h>
40#include "xlocale_private.h"
41
42enum {
43	_WCT_ERROR	= 0,
44	_WCT_TOLOWER	= 1,
45	_WCT_TOUPPER	= 2
46};
47
48wint_t
49towctrans_l(wint_t wc, wctrans_t desc, locale_t locale)
50{
51	switch (desc) {
52	case _WCT_TOLOWER:
53		wc = towlower_l(wc, locale);
54		break;
55	case _WCT_TOUPPER:
56		wc = towupper_l(wc, locale);
57		break;
58	case _WCT_ERROR:
59	default:
60		errno = EINVAL;
61		break;
62	}
63
64	return (wc);
65}
66wint_t
67towctrans(wint_t wc, wctrans_t desc)
68{
69	return towctrans_l(wc, desc, __get_locale());
70}
71
72/*
73 * wctrans() calls this will a 0 locale.  If this is ever modified to actually
74 * use the locale, wctrans() must be modified to call __get_locale().
75 */
76wctrans_t
77wctrans_l(const char *charclass, locale_t locale)
78{
79	struct {
80		const char	*name;
81		wctrans_t	 trans;
82	} ccls[] = {
83		{ "tolower",	_WCT_TOLOWER },
84		{ "toupper",	_WCT_TOUPPER },
85		{ NULL,		_WCT_ERROR },		/* Default */
86	};
87	int i;
88
89	i = 0;
90	while (ccls[i].name != NULL && strcmp(ccls[i].name, charclass) != 0)
91		i++;
92
93	if (ccls[i].trans == _WCT_ERROR)
94		errno = EINVAL;
95	return (ccls[i].trans);
96}
97
98wctrans_t
99wctrans(const char *charclass)
100{
101	return wctrans_l(charclass, 0);
102}
103
104