1 /* $NetBSD: multibyte.h,v 1.6 2013/08/18 20:03:48 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 /* mbstate_t private */
33
34 #ifdef _BSD_MBSTATE_T_
35 typedef _BSD_MBSTATE_T_ mbstate_t;
36 #undef _BSD_MBSTATE_T_
37 #endif
38
39 typedef struct _RuneStatePriv {
40 _RuneLocale *__runelocale;
41 char __private __attribute__((__aligned__));
42 } _RuneStatePriv;
43
44 typedef union _RuneState {
45 mbstate_t __pad;
46 struct _RuneStatePriv __priv;
47 #define rs_runelocale __priv.__runelocale
48 #define rs_private __priv.__private
49 } _RuneState;
50 #define _PRIVSIZE (sizeof(mbstate_t)-offsetof(_RuneStatePriv, __private))
51
52 #define _RUNE_LOCALE(loc) \
53 ((_RuneLocale *)((loc)->part_impl[(size_t)LC_CTYPE]))
54
55 #define _CITRUS_CTYPE(loc) \
56 (((_RuneLocale *)((loc)->part_impl[(size_t)LC_CTYPE]))->rl_citrus_ctype)
57
58 /* */
59
60 static __inline _RuneState *
_ps_to_runestate(mbstate_t * ps)61 _ps_to_runestate(mbstate_t *ps)
62 {
63 return (_RuneState *)(void *)ps;
64 }
65
66 static __inline _RuneState const *
_ps_to_runestate_const(mbstate_t const * ps)67 _ps_to_runestate_const(mbstate_t const *ps)
68 {
69 return (_RuneState const *)(void const *)ps;
70 }
71
72 static __inline _RuneLocale *
_ps_to_runelocale(mbstate_t const * ps)73 _ps_to_runelocale(mbstate_t const *ps)
74 {
75 return _ps_to_runestate_const(ps)->rs_runelocale;
76 }
77
78 static __inline _citrus_ctype_t
_ps_to_ctype(mbstate_t const * ps,locale_t loc)79 _ps_to_ctype(mbstate_t const *ps, locale_t loc)
80 {
81 if (!ps)
82 return _CITRUS_CTYPE(loc);
83
84 _DIAGASSERT(_ps_to_runelocale(ps) != NULL);
85
86 return _ps_to_runelocale(ps)->rl_citrus_ctype;
87 }
88
89 static __inline void *
_ps_to_private(mbstate_t * ps)90 _ps_to_private(mbstate_t *ps)
91 {
92 if (ps == NULL)
93 return NULL;
94 return (void *)&_ps_to_runestate(ps)->rs_private;
95 }
96
97 static __inline void const *
_ps_to_private_const(mbstate_t const * ps)98 _ps_to_private_const(mbstate_t const *ps)
99 {
100 if (ps == NULL)
101 return NULL;
102 return (void const *)&_ps_to_runestate_const(ps)->rs_private;
103 }
104
105 static __inline void
_init_ps(_RuneLocale * rl,mbstate_t * ps)106 _init_ps(_RuneLocale *rl, mbstate_t *ps)
107 {
108 size_t dum;
109 _ps_to_runestate(ps)->rs_runelocale = rl;
110 _citrus_ctype_mbrtowc(rl->rl_citrus_ctype, NULL, NULL, 0,
111 _ps_to_private(ps), &dum);
112 }
113
114 static __inline void
_fixup_ps(_RuneLocale * rl,mbstate_t * ps,int forceinit)115 _fixup_ps(_RuneLocale *rl, mbstate_t *ps, int forceinit)
116 {
117 /* for future multi-locale facility */
118 _DIAGASSERT(rl != NULL);
119
120 if (ps != NULL && (_ps_to_runelocale(ps) == NULL || forceinit)) {
121 _init_ps(rl, ps);
122 }
123 }
124
125 #endif /*_MULTIBYTE_H_*/
126