wctrans.c revision 121852 
1/*-
2 * Copyright (c) 2002 Tim J. Robbins.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/lib/libc/locale/wctrans.c 121852 2003-11-01 08:20:58Z tjr $");
29
30#include <errno.h>
31#include <string.h>
32#include <wctype.h>
33
34enum {
35	_WCT_ERROR	= 0,
36	_WCT_TOLOWER	= 1,
37	_WCT_TOUPPER	= 2
38};
39
40wint_t
41towctrans(wint_t wc, wctrans_t desc)
42{
43
44	switch (desc) {
45	case _WCT_TOLOWER:
46		wc = towlower(wc);
47		break;
48	case _WCT_TOUPPER:
49		wc = towupper(wc);
50		break;
51	case _WCT_ERROR:
52	default:
53		errno = EINVAL;
54		break;
55	}
56
57	return (wc);
58}
59
60wctrans_t
61wctrans(const char *charclass)
62{
63	struct {
64		const char	*name;
65		wctrans_t	 trans;
66	} ccls[] = {
67		{ "tolower",	_WCT_TOLOWER },
68		{ "toupper",	_WCT_TOUPPER },
69		{ NULL,		_WCT_ERROR },		/* Default */
70	};
71	int i;
72
73	i = 0;
74	while (ccls[i].name != NULL && strcmp(ccls[i].name, charclass) != 0)
75		i++;
76
77	if (ccls[i].trans == _WCT_ERROR)
78		errno = EINVAL;
79	return (ccls[i].trans);
80}
81