1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2004 Tim J. Robbins.
5 * All rights reserved.
6 *
7 * Copyright (c) 2011 The FreeBSD Foundation
8 *
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 <runetype.h>
35#include <wchar.h>
36#include <wctype.h>
37#include "mblocal.h"
38
39wint_t
40nextwctype_l(wint_t wc, wctype_t wct, locale_t locale)
41{
42	size_t lim;
43	FIX_LOCALE(locale);
44	_RuneLocale *runes = XLOCALE_CTYPE(locale)->runes;
45	_RuneRange *rr = &runes->__runetype_ext;
46	_RuneEntry *base, *re;
47	int noinc;
48
49	noinc = 0;
50	if (wc < _CACHED_RUNES) {
51		wc++;
52		while (wc < _CACHED_RUNES) {
53			if (runes->__runetype[wc] & wct)
54				return (wc);
55			wc++;
56		}
57		wc--;
58	}
59	if (rr->__ranges != NULL && wc < rr->__ranges[0].__min) {
60		wc = rr->__ranges[0].__min;
61		noinc = 1;
62	}
63
64	/* Binary search -- see bsearch.c for explanation. */
65	base = rr->__ranges;
66	for (lim = rr->__nranges; lim != 0; lim >>= 1) {
67		re = base + (lim >> 1);
68		if (re->__min <= wc && wc <= re->__max)
69			goto found;
70		else if (wc > re->__max) {
71			base = re + 1;
72			lim--;
73		}
74	}
75	return (-1);
76found:
77	if (!noinc)
78		wc++;
79	if (re->__min <= wc && wc <= re->__max) {
80		if (re->__types != NULL) {
81			for (; wc <= re->__max; wc++)
82				if (re->__types[wc - re->__min] & wct)
83					return (wc);
84		} else if (re->__map & wct)
85			return (wc);
86	}
87	while (++re < rr->__ranges + rr->__nranges) {
88		wc = re->__min;
89		if (re->__types != NULL) {
90			for (; wc <= re->__max; wc++)
91				if (re->__types[wc - re->__min] & wct)
92					return (wc);
93		} else if (re->__map & wct)
94			return (wc);
95	}
96	return (-1);
97}
98wint_t
99nextwctype(wint_t wc, wctype_t wct)
100{
101	return nextwctype_l(wc, wct, __get_locale());
102}
103