1 /* $NetBSD: multibyte.h,v 1.7 2020/06/02 01:30:31 joerg Exp $ */
2
3 /*-
4 * Copyright (c)2002 Citrus Project,
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
29 #ifndef _MULTIBYTE_H_
30 #define _MULTIBYTE_H_
31
32 #include <stdalign.h>
33
34 /* mbstate_t private */
35
36 #ifdef _BSD_MBSTATE_T_
37 typedef _BSD_MBSTATE_T_ mbstate_t;
38 #undef _BSD_MBSTATE_T_
39 #endif
40
41 typedef struct _RuneStatePriv {
42 _RuneLocale *__runelocale;
43 char __private[];
44 } _RuneStatePriv;
45
46 __CTASSERT(alignof(struct _RuneStatePriv) >= alignof(void *));
47 __CTASSERT(sizeof(_RuneStatePriv) % alignof(void *) == 0);
48 __CTASSERT(alignof(struct _RuneStatePriv) >= alignof(int));
49 __CTASSERT(sizeof(_RuneStatePriv) % alignof(int) == 0);
50
51 typedef union _RuneState {
52 mbstate_t __pad;
53 struct _RuneStatePriv __priv;
54 #define rs_runelocale __priv.__runelocale
55 #define rs_private __priv.__private
56 } _RuneState;
57 #define _PRIVSIZE (sizeof(mbstate_t)-offsetof(_RuneStatePriv, __private))
58
59 #define _RUNE_LOCALE(loc) \
60 ((_RuneLocale *)((loc)->part_impl[(size_t)LC_CTYPE]))
61
62 #define _CITRUS_CTYPE(loc) \
63 (((_RuneLocale *)((loc)->part_impl[(size_t)LC_CTYPE]))->rl_citrus_ctype)
64
65 /* */
66
67 static __inline _RuneState *
_ps_to_runestate(mbstate_t * ps)68 _ps_to_runestate(mbstate_t *ps)
69 {
70 return (_RuneState *)(void *)ps;
71 }
72
73 static __inline _RuneState const *
_ps_to_runestate_const(mbstate_t const * ps)74 _ps_to_runestate_const(mbstate_t const *ps)
75 {
76 return (_RuneState const *)(void const *)ps;
77 }
78
79 static __inline _RuneLocale *
_ps_to_runelocale(mbstate_t const * ps)80 _ps_to_runelocale(mbstate_t const *ps)
81 {
82 return _ps_to_runestate_const(ps)->rs_runelocale;
83 }
84
85 static __inline _citrus_ctype_t
_ps_to_ctype(mbstate_t const * ps,locale_t loc)86 _ps_to_ctype(mbstate_t const *ps, locale_t loc)
87 {
88 if (!ps)
89 return _CITRUS_CTYPE(loc);
90
91 _DIAGASSERT(_ps_to_runelocale(ps) != NULL);
92
93 return _ps_to_runelocale(ps)->rl_citrus_ctype;
94 }
95
96 static __inline void *
_ps_to_private(mbstate_t * ps)97 _ps_to_private(mbstate_t *ps)
98 {
99 if (ps == NULL)
100 return NULL;
101 return _ps_to_runestate(ps)->rs_private;
102 }
103
104 static __inline void const *
_ps_to_private_const(mbstate_t const * ps)105 _ps_to_private_const(mbstate_t const *ps)
106 {
107 if (ps == NULL)
108 return NULL;
109 return _ps_to_runestate_const(ps)->rs_private;
110 }
111
112 static __inline void
_init_ps(_RuneLocale * rl,mbstate_t * ps)113 _init_ps(_RuneLocale *rl, mbstate_t *ps)
114 {
115 size_t dum;
116 _ps_to_runestate(ps)->rs_runelocale = rl;
117 _citrus_ctype_mbrtowc(rl->rl_citrus_ctype, NULL, NULL, 0,
118 _ps_to_private(ps), &dum);
119 }
120
121 static __inline void
_fixup_ps(_RuneLocale * rl,mbstate_t * ps,int forceinit)122 _fixup_ps(_RuneLocale *rl, mbstate_t *ps, int forceinit)
123 {
124 /* for future multi-locale facility */
125 _DIAGASSERT(rl != NULL);
126
127 if (ps != NULL && (_ps_to_runelocale(ps) == NULL || forceinit)) {
128 _init_ps(rl, ps);
129 }
130 }
131
132 #endif /*_MULTIBYTE_H_*/
133