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 * Copyright (c) 2011 The FreeBSD Foundation 10 * All rights reserved. 11 * Portions of this software were developed by David Chisnall 12 * under sponsorship from the FreeBSD Foundation. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * $FreeBSD: head/lib/libc/locale/gbk.c 227753 2011-11-20 14:45:42Z theraven $ 39 */ 40 41 42 #include <sys/types.h> 43 #include <errno.h> 44 #include <runetype.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <wchar.h> 48 #include "mblocal.h" 49 50 extern int __mb_sb_limit; 51 52 static size_t _GBK_mbrtowc(wchar_t * __restrict, const char * __restrict, 53 size_t, mbstate_t * __restrict); 54 static int _GBK_mbsinit(const mbstate_t *); 55 static size_t _GBK_wcrtomb(char * __restrict, wchar_t, 56 mbstate_t * __restrict); 57 58 typedef struct { 59 wchar_t ch; 60 } _GBKState; 61 62 int 63 _GBK_init(struct xlocale_ctype *l, _RuneLocale *rl) 64 { 65 66 l->__mbrtowc = _GBK_mbrtowc; 67 l->__wcrtomb = _GBK_wcrtomb; 68 l->__mbsinit = _GBK_mbsinit; 69 l->runes = rl; 70 l->__mb_cur_max = 2; 71 l->__mb_sb_limit = 128; 72 return (0); 73 } 74 75 static int 76 _GBK_mbsinit(const mbstate_t *ps) 77 { 78 79 return (ps == NULL || ((const _GBKState *)ps)->ch == 0); 80 } 81 82 static __inline int 83 _gbk_check(u_int c) 84 { 85 86 c &= 0xff; 87 return ((c >= 0x81 && c <= 0xfe) ? 2 : 1); 88 } 89 90 static size_t 91 _GBK_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 92 mbstate_t * __restrict ps) 93 { 94 _GBKState *gs; 95 wchar_t wc; 96 size_t len; 97 98 gs = (_GBKState *)ps; 99 100 if ((gs->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 (gs->ch != 0) { 117 if (*s == '\0') { 118 errno = EILSEQ; 119 return ((size_t)-1); 120 } 121 wc = (gs->ch << 8) | (*s & 0xFF); 122 if (pwc != NULL) 123 *pwc = wc; 124 gs->ch = 0; 125 return (1); 126 } 127 128 len = (size_t)_gbk_check(*s); 129 wc = *s++ & 0xff; 130 if (len == 2) { 131 if (n < 2) { 132 /* Incomplete multibyte sequence */ 133 gs->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 _GBK_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps) 153 { 154 _GBKState *gs; 155 156 gs = (_GBKState *)ps; 157 158 if (gs->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