1 /*- 2 * Copyright 2013 Garrett D'Amore <garrett@damore.org> 3 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 4 * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved. 5 * Copyright (c) 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Paul Borman at Krystal Technologies. 10 * 11 * Copyright (c) 2011 The FreeBSD Foundation 12 * 13 * Portions of this software were developed by David Chisnall 14 * under sponsorship from the FreeBSD Foundation. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #if defined(LIBC_SCCS) && !defined(lint) 42 static char sccsid[] = "@(#)big5.c 8.1 (Berkeley) 6/4/93"; 43 #endif /* LIBC_SCCS and not lint */ 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 #include <sys/types.h> 48 #include <errno.h> 49 #include <runetype.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <wchar.h> 53 #include "mblocal.h" 54 55 extern int __mb_sb_limit; 56 57 static size_t _BIG5_mbrtowc(wchar_t * __restrict, const char * __restrict, 58 size_t, mbstate_t * __restrict); 59 static int _BIG5_mbsinit(const mbstate_t *); 60 static size_t _BIG5_wcrtomb(char * __restrict, wchar_t, 61 mbstate_t * __restrict); 62 static size_t _BIG5_mbsnrtowcs(wchar_t * __restrict, 63 const char ** __restrict, size_t, size_t, 64 mbstate_t * __restrict); 65 static size_t _BIG5_wcsnrtombs(char * __restrict, 66 const wchar_t ** __restrict, size_t, size_t, 67 mbstate_t * __restrict); 68 69 typedef struct { 70 wchar_t ch; 71 } _BIG5State; 72 73 int 74 _BIG5_init(struct xlocale_ctype *l, _RuneLocale *rl) 75 { 76 77 l->__mbrtowc = _BIG5_mbrtowc; 78 l->__wcrtomb = _BIG5_wcrtomb; 79 l->__mbsnrtowcs = _BIG5_mbsnrtowcs; 80 l->__wcsnrtombs = _BIG5_wcsnrtombs; 81 l->__mbsinit = _BIG5_mbsinit; 82 l->runes = rl; 83 l->__mb_cur_max = 2; 84 l->__mb_sb_limit = 128; 85 return (0); 86 } 87 88 static int 89 _BIG5_mbsinit(const mbstate_t *ps) 90 { 91 92 return (ps == NULL || ((const _BIG5State *)ps)->ch == 0); 93 } 94 95 static __inline int 96 _big5_check(u_int c) 97 { 98 99 c &= 0xff; 100 return ((c >= 0xa1 && c <= 0xfe) ? 2 : 1); 101 } 102 103 static size_t 104 _BIG5_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 105 mbstate_t * __restrict ps) 106 { 107 _BIG5State *bs; 108 wchar_t wc; 109 size_t len; 110 111 bs = (_BIG5State *)ps; 112 113 if ((bs->ch & ~0xFF) != 0) { 114 /* Bad conversion state. */ 115 errno = EINVAL; 116 return ((size_t)-1); 117 } 118 119 if (s == NULL) { 120 s = ""; 121 n = 1; 122 pwc = NULL; 123 } 124 125 if (n == 0) 126 /* Incomplete multibyte sequence */ 127 return ((size_t)-2); 128 129 if (bs->ch != 0) { 130 if (*s == '\0') { 131 errno = EILSEQ; 132 return ((size_t)-1); 133 } 134 wc = (bs->ch << 8) | (*s & 0xFF); 135 if (pwc != NULL) 136 *pwc = wc; 137 bs->ch = 0; 138 return (1); 139 } 140 141 len = (size_t)_big5_check(*s); 142 wc = *s++ & 0xff; 143 if (len == 2) { 144 if (n < 2) { 145 /* Incomplete multibyte sequence */ 146 bs->ch = wc; 147 return ((size_t)-2); 148 } 149 if (*s == '\0') { 150 errno = EILSEQ; 151 return ((size_t)-1); 152 } 153 wc = (wc << 8) | (*s++ & 0xff); 154 if (pwc != NULL) 155 *pwc = wc; 156 return (2); 157 } else { 158 if (pwc != NULL) 159 *pwc = wc; 160 return (wc == L'\0' ? 0 : 1); 161 } 162 } 163 164 static size_t 165 _BIG5_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps) 166 { 167 _BIG5State *bs; 168 169 bs = (_BIG5State *)ps; 170 171 if (bs->ch != 0) { 172 errno = EINVAL; 173 return ((size_t)-1); 174 } 175 176 if (s == NULL) 177 /* Reset to initial shift state (no-op) */ 178 return (1); 179 if (wc & 0x8000) { 180 *s++ = (wc >> 8) & 0xff; 181 *s = wc & 0xff; 182 return (2); 183 } 184 *s = wc & 0xff; 185 return (1); 186 } 187 188 static size_t 189 _BIG5_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 190 size_t nms, size_t len, mbstate_t * __restrict ps) 191 { 192 return (__mbsnrtowcs_std(dst, src, nms, len, ps, _BIG5_mbrtowc)); 193 } 194 195 static size_t 196 _BIG5_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, 197 size_t nwc, size_t len, mbstate_t * __restrict ps) 198 { 199 return (__wcsnrtombs_std(dst, src, nwc, len, ps, _BIG5_wcrtomb)); 200 } 201