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
38 struct csnode {
39 wchar_t csn_min;
40 wchar_t csn_max;
41 struct csnode *csn_left;
42 struct csnode *csn_right;
43 };
44
45 struct csclass {
46 wctype_t csc_type;
47 bool csc_invert;
48 struct csclass *csc_next;
49 };
50
51 struct 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
60 bool cset_addclass(struct cset *, wctype_t, bool);
61 struct cset * cset_alloc(void);
62 bool cset_add(struct cset *, wchar_t);
63 void cset_invert(struct cset *);
64 bool cset_in_hard(struct cset *, wchar_t);
65 void cset_cache(struct cset *);
66
67 static __inline bool
cset_in(struct cset * cs,wchar_t ch)68 cset_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