1/*-
2 * Copyright (c) 2004 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: src/lib/libc/locale/nextwctype.c,v 1.1 2004/07/08 06:43:37 tjr Exp $");
29
30#include "xlocale_private.h"
31
32#include <runetype.h>
33#include <wchar.h>
34#include <wctype.h>
35
36wint_t
37nextwctype_l(wint_t wc, wctype_t wct, locale_t loc)
38{
39	size_t lim;
40	_RuneRange *rr;
41	_RuneEntry *base, *re;
42	int noinc;
43	_RuneLocale *rl = &loc->__lc_ctype->_CurrentRuneLocale;
44
45	noinc = 0;
46	if (wc < _CACHED_RUNES) {
47		wc++;
48		while (wc < _CACHED_RUNES) {
49			if (rl->__runetype[wc] & wct)
50				return (wc);
51			wc++;
52		}
53		wc--;
54	}
55	rr = &rl->__runetype_ext;
56	if (rr->__ranges != NULL && wc < rr->__ranges[0].__min) {
57		wc = rr->__ranges[0].__min;
58		noinc = 1;
59	}
60
61	/* Binary search -- see bsearch.c for explanation. */
62	base = rr->__ranges;
63	for (lim = rr->__nranges; lim != 0; lim >>= 1) {
64		re = base + (lim >> 1);
65		if (re->__min <= wc && wc <= re->__max)
66			goto found;
67		else if (wc > re->__max) {
68			base = re + 1;
69			lim--;
70		}
71	}
72	return (-1);
73found:
74	if (!noinc)
75		wc++;
76	if (re->__min <= wc && wc <= re->__max) {
77		if (re->__types != NULL) {
78			for (; wc <= re->__max; wc++)
79				if (re->__types[wc - re->__min] & wct)
80					return (wc);
81		} else if (re->__map & wct)
82			return (wc);
83	}
84	while (++re < rr->__ranges + rr->__nranges) {
85		wc = re->__min;
86		if (re->__types != NULL) {
87			for (; wc <= re->__max; wc++)
88				if (re->__types[wc - re->__min] & wct)
89					return (wc);
90		} else if (re->__map & wct)
91			return (wc);
92	}
93	return (-1);
94}
95
96wint_t
97nextwctype(wint_t wc, wctype_t wct)
98{
99	return nextwctype_l(wc, wct, __current_locale());
100}
101