xref: /freebsd/include/runetype.h (revision 5e3190f700637fcfc1a52daeaa4a031fdd2557c7)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Paul Borman at Krystal Technologies.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  *
34  *	@(#)runetype.h	8.1 (Berkeley) 6/2/93
35  */
36 
37 #ifndef	_RUNETYPE_H_
38 #define	_RUNETYPE_H_
39 
40 #include <sys/cdefs.h>
41 #include <sys/_types.h>
42 
43 #define	_CACHED_RUNES	(1 <<8 )	/* Must be a power of 2 */
44 #define	_CRMASK		(~(_CACHED_RUNES - 1))
45 
46 /*
47  * The lower 8 bits of runetype[] contain the digit value of the rune.
48  */
49 typedef struct {
50 	__rune_t	__min;		/* First rune of the range */
51 	__rune_t	__max;		/* Last rune (inclusive) of the range */
52 	__rune_t	__map;		/* What first maps to in maps */
53 	unsigned long	*__types;	/* Array of types in range */
54 } _RuneEntry;
55 
56 typedef struct {
57 	int		__nranges;	/* Number of ranges stored */
58 	_RuneEntry	*__ranges;	/* Pointer to the ranges */
59 } _RuneRange;
60 
61 typedef struct {
62 	char		__magic[8];	/* Magic saying what version we are */
63 	char		__encoding[32];	/* ASCII name of this encoding */
64 
65 	__rune_t	(*__sgetrune)(const char *, __size_t, char const **);
66 	int		(*__sputrune)(__rune_t, char *, __size_t, char **);
67 	__rune_t	__invalid_rune;
68 
69 	unsigned long	__runetype[_CACHED_RUNES];
70 	__rune_t	__maplower[_CACHED_RUNES];
71 	__rune_t	__mapupper[_CACHED_RUNES];
72 
73 	/*
74 	 * The following are to deal with Runes larger than _CACHED_RUNES - 1.
75 	 * Their data is actually contiguous with this structure so as to make
76 	 * it easier to read/write from/to disk.
77 	 */
78 	_RuneRange	__runetype_ext;
79 	_RuneRange	__maplower_ext;
80 	_RuneRange	__mapupper_ext;
81 
82 	void		*__variable;	/* Data which depends on the encoding */
83 	int		__variable_len;	/* how long that data is */
84 } _RuneLocale;
85 
86 #define	_RUNE_MAGIC_1	"RuneMagi"	/* Indicates version 0 of RuneLocale */
87 __BEGIN_DECLS
88 extern const _RuneLocale _DefaultRuneLocale;
89 extern const _RuneLocale *_CurrentRuneLocale;
90 #ifdef __RUNETYPE_INTERNAL
91 extern const _RuneLocale *__getCurrentRuneLocale(void);
92 #else
93 extern _Thread_local const _RuneLocale *_ThreadRuneLocale;
94 static __inline const _RuneLocale *__getCurrentRuneLocale(void)
95 {
96 
97 	if (_ThreadRuneLocale)
98 		return _ThreadRuneLocale;
99 	return _CurrentRuneLocale;
100 }
101 #endif /*__RUNETYPE_INTERNAL */
102 #define _CurrentRuneLocale (__getCurrentRuneLocale())
103 __END_DECLS
104 
105 #endif	/* !_RUNETYPE_H_ */
106