1 /* 2 * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved. 3 * Copyright (c) 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Paul Borman at Krystal Technologies. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 40 * Use is subject to license terms. 41 */ 42 43 #include "lint.h" 44 #include <sys/types.h> 45 #include <errno.h> 46 #include "runetype.h" 47 #include <stdlib.h> 48 #include <string.h> 49 #include <wchar.h> 50 #include "mblocal.h" 51 52 static size_t _BIG5_mbrtowc(wchar_t *_RESTRICT_KYWD, 53 const char *_RESTRICT_KYWD, 54 size_t, mbstate_t *RESTRICT_KYWD); 55 static int _BIG5_mbsinit(const mbstate_t *); 56 static size_t _BIG5_wcrtomb(char *_RESTRICT_KYWD, wchar_t, 57 mbstate_t *_RESTRICT_KYWD); 58 59 typedef struct { 60 wchar_t ch; 61 } _BIG5State; 62 63 int 64 _BIG5_init(_RuneLocale *rl) 65 { 66 67 __mbrtowc = _BIG5_mbrtowc; 68 __wcrtomb = _BIG5_wcrtomb; 69 __mbsinit = _BIG5_mbsinit; 70 _CurrentRuneLocale = rl; 71 __ctype[520] = 2; 72 return (0); 73 } 74 75 static int 76 _BIG5_mbsinit(const mbstate_t *ps) 77 { 78 79 return (ps == NULL || ((const _BIG5State *)ps)->ch == 0); 80 } 81 82 static int 83 _big5_check(uint_t c) 84 { 85 86 c &= 0xff; 87 return ((c >= 0xa1 && c <= 0xfe) ? 2 : 1); 88 } 89 90 static size_t 91 _BIG5_mbrtowc(wchar_t *_RESTRICT_KYWD pwc, const char *_RESTRICT_KYWD s, 92 size_t n, mbstate_t *_RESTRICT_KYWD ps) 93 { 94 _BIG5State *bs; 95 wchar_t wc; 96 size_t len; 97 98 bs = (_BIG5State *)ps; 99 100 if ((bs->ch & ~0xFF) != 0) { 101 /* Bad conversion state. */ 102 errno = EINVAL; 103 return ((size_t)-1); 104 } 105 106 if (s == NULL) { 107 s = ""; 108 n = 1; 109 pwc = NULL; 110 } 111 112 if (n == 0) 113 /* Incomplete multibyte sequence */ 114 return ((size_t)-2); 115 116 if (bs->ch != 0) { 117 if (*s == '\0') { 118 errno = EILSEQ; 119 return ((size_t)-1); 120 } 121 wc = (bs->ch << 8) | (*s & 0xFF); 122 if (pwc != NULL) 123 *pwc = wc; 124 bs->ch = 0; 125 return (1); 126 } 127 128 len = (size_t)_big5_check(*s); 129 wc = *s++ & 0xff; 130 if (len == 2) { 131 if (n < 2) { 132 /* Incomplete multibyte sequence */ 133 bs->ch = wc; 134 return ((size_t)-2); 135 } 136 if (*s == '\0') { 137 errno = EILSEQ; 138 return ((size_t)-1); 139 } 140 wc = (wc << 8) | (*s++ & 0xff); 141 if (pwc != NULL) 142 *pwc = wc; 143 return (2); 144 } else { 145 if (pwc != NULL) 146 *pwc = wc; 147 return (wc == L'\0' ? 0 : 1); 148 } 149 } 150 151 static size_t 152 _BIG5_wcrtomb(char *_RESTRICT_KYWD s, wchar_t wc, mbstate_t *_RESTRICT_KYWD ps) 153 { 154 _BIG5State *bs; 155 156 bs = (_BIG5State *)ps; 157 158 if (bs->ch != 0) { 159 errno = EINVAL; 160 return ((size_t)-1); 161 } 162 163 if (s == NULL) 164 /* Reset to initial shift state (no-op) */ 165 return (1); 166 if (wc & 0x8000) { 167 *s++ = (wc >> 8) & 0xff; 168 *s = wc & 0xff; 169 return (2); 170 } 171 *s = wc & 0xff; 172 return (1); 173 } 174