1 /* $NetBSD: multibyte.h,v 1.2 2002/03/18 22:58:44 tshiozak 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 53 /* */ 54 55 static __inline _citrus_ctype_t 56 _to_cur_ctype(void) 57 { 58 return (_CurrentRuneLocale->rl_citrus_ctype); 59 } 60 61 static __inline _RuneState * 62 _ps_to_runestate(mbstate_t *ps) 63 { 64 return (_RuneState *)(void *)ps; 65 } 66 67 static __inline _RuneState const * 68 _ps_to_runestate_const(mbstate_t const *ps) 69 { 70 return (_RuneState const *)(void const *)ps; 71 } 72 73 static __inline _RuneLocale * 74 _ps_to_runelocale(mbstate_t const *ps) 75 { 76 return _ps_to_runestate_const(ps)->rs_runelocale; 77 } 78 79 static __inline _citrus_ctype_t 80 _ps_to_ctype(mbstate_t const *ps) 81 { 82 if (!ps) 83 return _to_cur_ctype(); 84 85 _DIAGASSERT(_ps_to_runelocale(ps) != NULL); 86 87 return _ps_to_runelocale(ps)->rl_citrus_ctype; 88 } 89 90 static __inline void * 91 _ps_to_private(mbstate_t *ps) 92 { 93 if (ps == NULL) 94 return NULL; 95 return (void *)&_ps_to_runestate(ps)->rs_private; 96 } 97 98 static __inline void const * 99 _ps_to_private_const(mbstate_t const *ps) 100 { 101 if (ps == NULL) 102 return NULL; 103 return (void const *)&_ps_to_runestate_const(ps)->rs_private; 104 } 105 106 static __inline void 107 _init_ps(_RuneLocale *rl, mbstate_t *ps) 108 { 109 size_t dum; 110 _ps_to_runestate(ps)->rs_runelocale = rl; 111 _citrus_ctype_mbrtowc(rl->rl_citrus_ctype, NULL, NULL, NULL, 112 _ps_to_private(ps), &dum); 113 } 114 115 static __inline void 116 _fixup_ps(_RuneLocale *rl, mbstate_t *ps, int forceinit) 117 { 118 /* for future multi-locale facility */ 119 _DIAGASSERT(rl != NULL); 120 121 if (ps != NULL && (_ps_to_runelocale(ps) == NULL || forceinit)) { 122 _init_ps(rl, ps); 123 } 124 } 125 126 #endif 127