1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2004 Tim J. Robbins.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31#ifndef CSET_H
32#define	CSET_H
33
34#include <stdbool.h>
35#include <wchar.h>
36#include <wctype.h>
37
38struct csnode {
39	wchar_t		csn_min;
40	wchar_t		csn_max;
41	struct csnode	*csn_left;
42	struct csnode	*csn_right;
43};
44
45struct csclass {
46	wctype_t	csc_type;
47	bool		csc_invert;
48	struct csclass	*csc_next;
49};
50
51struct cset {
52#define	CS_CACHE_SIZE	256
53	bool		cs_cache[CS_CACHE_SIZE];
54	bool		cs_havecache;
55	struct csclass	*cs_classes;
56	struct csnode	*cs_root;
57	bool		cs_invert;
58};
59
60bool			cset_addclass(struct cset *, wctype_t, bool);
61struct cset *		cset_alloc(void);
62bool 			cset_add(struct cset *, wchar_t);
63void			cset_invert(struct cset *);
64bool			cset_in_hard(struct cset *, wchar_t);
65void			cset_cache(struct cset *);
66
67static __inline bool
68cset_in(struct cset *cs, wchar_t ch)
69{
70
71	if (ch < CS_CACHE_SIZE && cs->cs_havecache)
72		return (cs->cs_cache[ch]);
73	return (cset_in_hard(cs, ch));
74}
75
76#endif	/* CSET_H */
77