1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2004 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("$FreeBSD$");
36
37#include <runetype.h>
38#include <wchar.h>
39#include <wctype.h>
40#include "mblocal.h"
41
42wint_t
43nextwctype_l(wint_t wc, wctype_t wct, locale_t locale)
44{
45	size_t lim;
46	FIX_LOCALE(locale);
47	_RuneLocale *runes = XLOCALE_CTYPE(locale)->runes;
48	_RuneRange *rr = &runes->__runetype_ext;
49	_RuneEntry *base, *re;
50	int noinc;
51
52	noinc = 0;
53	if (wc < _CACHED_RUNES) {
54		wc++;
55		while (wc < _CACHED_RUNES) {
56			if (runes->__runetype[wc] & wct)
57				return (wc);
58			wc++;
59		}
60		wc--;
61	}
62	if (rr->__ranges != NULL && wc < rr->__ranges[0].__min) {
63		wc = rr->__ranges[0].__min;
64		noinc = 1;
65	}
66
67	/* Binary search -- see bsearch.c for explanation. */
68	base = rr->__ranges;
69	for (lim = rr->__nranges; lim != 0; lim >>= 1) {
70		re = base + (lim >> 1);
71		if (re->__min <= wc && wc <= re->__max)
72			goto found;
73		else if (wc > re->__max) {
74			base = re + 1;
75			lim--;
76		}
77	}
78	return (-1);
79found:
80	if (!noinc)
81		wc++;
82	if (re->__min <= wc && wc <= re->__max) {
83		if (re->__types != NULL) {
84			for (; wc <= re->__max; wc++)
85				if (re->__types[wc - re->__min] & wct)
86					return (wc);
87		} else if (re->__map & wct)
88			return (wc);
89	}
90	while (++re < rr->__ranges + rr->__nranges) {
91		wc = re->__min;
92		if (re->__types != NULL) {
93			for (; wc <= re->__max; wc++)
94				if (re->__types[wc - re->__min] & wct)
95					return (wc);
96		} else if (re->__map & wct)
97			return (wc);
98	}
99	return (-1);
100}
101wint_t
102nextwctype(wint_t wc, wctype_t wct)
103{
104	return nextwctype_l(wc, wct, __get_locale());
105}
106