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 * All rights reserved. 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 * 4. 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#include <sys/cdefs.h> 42__FBSDID("$FreeBSD$"); 43 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 52extern int __mb_sb_limit; 53 54static size_t _GBK_mbrtowc(wchar_t * __restrict, const char * __restrict, 55 size_t, mbstate_t * __restrict); 56static int _GBK_mbsinit(const mbstate_t *); 57static size_t _GBK_wcrtomb(char * __restrict, wchar_t, 58 mbstate_t * __restrict); 59static size_t _GBK_mbsnrtowcs(wchar_t * __restrict, 60 const char ** __restrict, size_t, size_t, 61 mbstate_t * __restrict); 62static size_t _GBK_wcsnrtombs(char * __restrict, 63 const wchar_t ** __restrict, size_t, size_t, 64 mbstate_t * __restrict); 65 66typedef struct { 67 wchar_t ch; 68} _GBKState; 69 70int 71_GBK_init(struct xlocale_ctype *l, _RuneLocale *rl) 72{ 73 74 l->__mbrtowc = _GBK_mbrtowc; 75 l->__wcrtomb = _GBK_wcrtomb; 76 l->__mbsinit = _GBK_mbsinit; 77 l->__mbsnrtowcs = _GBK_mbsnrtowcs; 78 l->__wcsnrtombs = _GBK_wcsnrtombs; 79 l->runes = rl; 80 l->__mb_cur_max = 2; 81 l->__mb_sb_limit = 128; 82 return (0); 83} 84 85static int 86_GBK_mbsinit(const mbstate_t *ps) 87{ 88 89 return (ps == NULL || ((const _GBKState *)ps)->ch == 0); 90} 91 92static int 93_gbk_check(u_int c) 94{ 95 96 c &= 0xff; 97 return ((c >= 0x81 && c <= 0xfe) ? 2 : 1); 98} 99 100static size_t 101_GBK_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 102 mbstate_t * __restrict ps) 103{ 104 _GBKState *gs; 105 wchar_t wc; 106 size_t len; 107 108 gs = (_GBKState *)ps; 109 110 if ((gs->ch & ~0xFF) != 0) { 111 /* Bad conversion state. */ 112 errno = EINVAL; 113 return ((size_t)-1); 114 } 115 116 if (s == NULL) { 117 s = ""; 118 n = 1; 119 pwc = NULL; 120 } 121 122 if (n == 0) 123 /* Incomplete multibyte sequence */ 124 return ((size_t)-2); 125 126 if (gs->ch != 0) { 127 if (*s == '\0') { 128 errno = EILSEQ; 129 return ((size_t)-1); 130 } 131 wc = (gs->ch << 8) | (*s & 0xFF); 132 if (pwc != NULL) 133 *pwc = wc; 134 gs->ch = 0; 135 return (1); 136 } 137 138 len = (size_t)_gbk_check(*s); 139 wc = *s++ & 0xff; 140 if (len == 2) { 141 if (n < 2) { 142 /* Incomplete multibyte sequence */ 143 gs->ch = wc; 144 return ((size_t)-2); 145 } 146 if (*s == '\0') { 147 errno = EILSEQ; 148 return ((size_t)-1); 149 } 150 wc = (wc << 8) | (*s++ & 0xff); 151 if (pwc != NULL) 152 *pwc = wc; 153 return (2); 154 } else { 155 if (pwc != NULL) 156 *pwc = wc; 157 return (wc == L'\0' ? 0 : 1); 158 } 159} 160 161static size_t 162_GBK_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps) 163{ 164 _GBKState *gs; 165 166 gs = (_GBKState *)ps; 167 168 if (gs->ch != 0) { 169 errno = EINVAL; 170 return ((size_t)-1); 171 } 172 173 if (s == NULL) 174 /* Reset to initial shift state (no-op) */ 175 return (1); 176 if (wc & 0x8000) { 177 *s++ = (wc >> 8) & 0xff; 178 *s = wc & 0xff; 179 return (2); 180 } 181 *s = wc & 0xff; 182 return (1); 183} 184 185static size_t 186_GBK_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 187 size_t nms, size_t len, mbstate_t * __restrict ps) 188{ 189 return (__mbsnrtowcs_std(dst, src, nms, len, ps, _GBK_mbrtowc)); 190} 191 192static size_t 193_GBK_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, 194 size_t nwc, size_t len, mbstate_t * __restrict ps) 195{ 196 return (__wcsnrtombs_std(dst, src, nwc, len, ps, _GBK_wcrtomb)); 197} 198