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 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "lint.h" 37 #include <sys/types.h> 38 #include <errno.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <wchar.h> 42 #include "mblocal.h" 43 #include "lctype.h" 44 45 static size_t _BIG5_mbrtowc(wchar_t *_RESTRICT_KYWD, 46 const char *_RESTRICT_KYWD, 47 size_t, mbstate_t *RESTRICT_KYWD); 48 static int _BIG5_mbsinit(const mbstate_t *); 49 static size_t _BIG5_wcrtomb(char *_RESTRICT_KYWD, wchar_t, 50 mbstate_t *_RESTRICT_KYWD); 51 static size_t _BIG5_mbsnrtowcs(wchar_t *_RESTRICT_KYWD, 52 const char **_RESTRICT_KYWD, size_t, size_t, 53 mbstate_t *_RESTRICT_KYWD); 54 static size_t _BIG5_wcsnrtombs(char *_RESTRICT_KYWD, 55 const wchar_t **_RESTRICT_KYWD, size_t, size_t, 56 mbstate_t *_RESTRICT_KYWD); 57 58 typedef struct { 59 wchar_t ch; 60 } _BIG5State; 61 62 void 63 _BIG5_init(struct lc_ctype *lct) 64 { 65 lct->lc_mbrtowc = _BIG5_mbrtowc; 66 lct->lc_wcrtomb = _BIG5_wcrtomb; 67 lct->lc_mbsnrtowcs = _BIG5_mbsnrtowcs; 68 lct->lc_wcsnrtombs = _BIG5_wcsnrtombs; 69 lct->lc_mbsinit = _BIG5_mbsinit; 70 lct->lc_max_mblen = 2; 71 lct->lc_is_ascii = 0; 72 } 73 74 static int 75 _BIG5_mbsinit(const mbstate_t *ps) 76 { 77 78 return (ps == NULL || ((const _BIG5State *)ps)->ch == 0); 79 } 80 81 static int 82 _big5_check(uint_t c) 83 { 84 85 c &= 0xff; 86 return ((c >= 0xa1 && c <= 0xfe) ? 2 : 1); 87 } 88 89 static size_t 90 _BIG5_mbrtowc(wchar_t *_RESTRICT_KYWD pwc, const char *_RESTRICT_KYWD s, 91 size_t n, mbstate_t *_RESTRICT_KYWD ps) 92 { 93 _BIG5State *bs; 94 wchar_t wc; 95 size_t len; 96 97 bs = (_BIG5State *)ps; 98 99 if ((bs->ch & ~0xFF) != 0) { 100 /* Bad conversion state. */ 101 errno = EINVAL; 102 return ((size_t)-1); 103 } 104 105 if (s == NULL) { 106 s = ""; 107 n = 1; 108 pwc = NULL; 109 } 110 111 if (n == 0) 112 /* Incomplete multibyte sequence */ 113 return ((size_t)-2); 114 115 if (bs->ch != 0) { 116 if (*s == '\0') { 117 errno = EILSEQ; 118 return ((size_t)-1); 119 } 120 wc = (bs->ch << 8) | (*s & 0xFF); 121 if (pwc != NULL) 122 *pwc = wc; 123 bs->ch = 0; 124 return (1); 125 } 126 127 len = (size_t)_big5_check(*s); 128 wc = *s++ & 0xff; 129 if (len == 2) { 130 if (n < 2) { 131 /* Incomplete multibyte sequence */ 132 bs->ch = wc; 133 return ((size_t)-2); 134 } 135 if (*s == '\0') { 136 errno = EILSEQ; 137 return ((size_t)-1); 138 } 139 wc = (wc << 8) | (*s++ & 0xff); 140 if (pwc != NULL) 141 *pwc = wc; 142 return (2); 143 } else { 144 if (pwc != NULL) 145 *pwc = wc; 146 return (wc == L'\0' ? 0 : 1); 147 } 148 } 149 150 static size_t 151 _BIG5_wcrtomb(char *_RESTRICT_KYWD s, wchar_t wc, mbstate_t *_RESTRICT_KYWD ps) 152 { 153 _BIG5State *bs; 154 155 bs = (_BIG5State *)ps; 156 157 if (bs->ch != 0) { 158 errno = EINVAL; 159 return ((size_t)-1); 160 } 161 162 if (s == NULL) 163 /* Reset to initial shift state (no-op) */ 164 return (1); 165 if (wc & 0x8000) { 166 *s++ = (wc >> 8) & 0xff; 167 *s = wc & 0xff; 168 return (2); 169 } 170 *s = wc & 0xff; 171 return (1); 172 } 173 174 static size_t 175 _BIG5_mbsnrtowcs(wchar_t *_RESTRICT_KYWD dst, const char **_RESTRICT_KYWD src, 176 size_t nms, size_t len, mbstate_t *_RESTRICT_KYWD ps) 177 { 178 return (__mbsnrtowcs_std(dst, src, nms, len, ps, _BIG5_mbrtowc)); 179 } 180 181 static size_t 182 _BIG5_wcsnrtombs(char *_RESTRICT_KYWD dst, const wchar_t **_RESTRICT_KYWD src, 183 size_t nwc, size_t len, mbstate_t *_RESTRICT_KYWD ps) 184 { 185 return (__wcsnrtombs_std(dst, src, nwc, len, ps, _BIG5_wcrtomb)); 186 } 187