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 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include <sys/cdefs.h> 35__FBSDID("$FreeBSD: src/lib/libc/locale/gbk.c,v 1.14 2007/10/13 16:28:21 ache Exp $"); 36 37#include "xlocale_private.h" 38 39#include <sys/types.h> 40#include <errno.h> 41#include <runetype.h> 42#include <stdlib.h> 43#include <string.h> 44#include <wchar.h> 45#include "mblocal.h" 46 47static size_t _GBK_mbrtowc(wchar_t * __restrict, const char * __restrict, 48 size_t, mbstate_t * __restrict, locale_t); 49static int _GBK_mbsinit(const mbstate_t *, locale_t); 50static size_t _GBK_wcrtomb(char * __restrict, wchar_t, 51 mbstate_t * __restrict, locale_t); 52 53typedef struct { 54 wchar_t ch; 55} _GBKState; 56 57int 58_GBK_init(struct __xlocale_st_runelocale *xrl) 59{ 60 61 xrl->__mbrtowc = _GBK_mbrtowc; 62 xrl->__wcrtomb = _GBK_wcrtomb; 63 xrl->__mbsinit = _GBK_mbsinit; 64 xrl->__mb_cur_max = 2; 65 xrl->__mb_sb_limit = 128; 66 return (0); 67} 68 69static int 70_GBK_mbsinit(const mbstate_t *ps, locale_t loc __unused) 71{ 72 73 return (ps == NULL || ((const _GBKState *)ps)->ch == 0); 74} 75 76static __inline int 77_gbk_check(u_int c) 78{ 79 80 c &= 0xff; 81 return ((c >= 0x81 && c <= 0xfe) ? 2 : 1); 82} 83 84static size_t 85_GBK_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 86 mbstate_t * __restrict ps, locale_t loc __unused) 87{ 88 _GBKState *gs; 89 wchar_t wc; 90 size_t len; 91 92 gs = (_GBKState *)ps; 93 94 if ((gs->ch & ~0xFF) != 0) { 95 /* Bad conversion state. */ 96 errno = EINVAL; 97 return ((size_t)-1); 98 } 99 100 if (s == NULL) { 101 s = ""; 102 n = 1; 103 pwc = NULL; 104 } 105 106 if (n == 0) 107 /* Incomplete multibyte sequence */ 108 return ((size_t)-2); 109 110 if (gs->ch != 0) { 111 if (*s == '\0') { 112 errno = EILSEQ; 113 return ((size_t)-1); 114 } 115 wc = (gs->ch << 8) | (*s & 0xFF); 116 if (pwc != NULL) 117 *pwc = wc; 118 gs->ch = 0; 119 return (1); 120 } 121 122 len = (size_t)_gbk_check(*s); 123 wc = *s++ & 0xff; 124 if (len == 2) { 125 if (n < 2) { 126 /* Incomplete multibyte sequence */ 127 gs->ch = wc; 128 return ((size_t)-2); 129 } 130 if (*s == '\0') { 131 errno = EILSEQ; 132 return ((size_t)-1); 133 } 134 wc = (wc << 8) | (*s++ & 0xff); 135 if (pwc != NULL) 136 *pwc = wc; 137 return (2); 138 } else { 139 if (pwc != NULL) 140 *pwc = wc; 141 return (wc == L'\0' ? 0 : 1); 142 } 143} 144 145static size_t 146_GBK_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps, locale_t loc __unused) 147{ 148 _GBKState *gs; 149 150 gs = (_GBKState *)ps; 151 152 if (gs->ch != 0) { 153 errno = EINVAL; 154 return ((size_t)-1); 155 } 156 157 if (s == NULL) 158 /* Reset to initial shift state (no-op) */ 159 return (1); 160 if (wc & 0x8000) { 161 *s++ = (wc >> 8) & 0xff; 162 *s = wc & 0xff; 163 return (2); 164 } 165 *s = wc & 0xff; 166 return (1); 167} 168