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
39 wint_t
nextwctype_l(wint_t wc,wctype_t wct,locale_t locale)40 nextwctype_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);
76 found:
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 }
98 wint_t
nextwctype(wint_t wc,wctype_t wct)99 nextwctype(wint_t wc, wctype_t wct)
100 {
101 return nextwctype_l(wc, wct, __get_locale());
102 }
103