wctrans.c revision 101313 
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 101313 2002-08-04 12:09:08Z tjr $");
29
30#include <ctype.h>
31#include <errno.h>
32#include <string.h>
33#include <wctype.h>
34
35enum {
36	_WCT_ERROR	= 0,
37	_WCT_TOLOWER	= 1,
38	_WCT_TOUPPER	= 2
39};
40
41/*
42 * TODO: Supply a macro version of this.
43 */
44wint_t
45towctrans(wint_t wc, wctrans_t desc)
46{
47
48	switch (desc) {
49	case _WCT_TOLOWER:
50		wc = tolower(wc);
51		break;
52	case _WCT_TOUPPER:
53		wc = toupper(wc);
54		break;
55	case _WCT_ERROR:
56	default:
57		errno = EINVAL;
58		break;
59	}
60
61	return (wc);
62}
63
64wctrans_t
65wctrans(const char *charclass)
66{
67	struct {
68		const char	*name;
69		wctrans_t	 trans;
70	} ccls[] = {
71		{ "tolower",	_WCT_TOLOWER },
72		{ "toupper",	_WCT_TOUPPER },
73		{ NULL,		_WCT_ERROR },		/* Default */
74	};
75	int i;
76
77	i = 0;
78	while (ccls[i].name != NULL && strcmp(ccls[i].name, charclass) != 0)
79		i++;
80
81	if (ccls[i].trans == _WCT_ERROR)
82		errno = EINVAL;
83	return (ccls[i].trans);
84}
85