2 * Copyright (c) 2004 Tim J. Robbins. All rights reserved.
3 * Copyright (c) 2003 David Xu <davidxu@freebsd.org>
6 * Copyright (c) 2011 The FreeBSD Foundation
8 * Portions of this software were developed by David Chisnall
9 * under sponsorship from the FreeBSD Foundation.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * $FreeBSD: head/lib/libc/locale/gb2312.c 227753 2011-11-20 14:45:42Z theraven $
35 #include <sys/param.h>
44 static size_t _GB2312_mbrtowc(wchar_t * __restrict, const char * __restrict,
45 size_t, mbstate_t * __restrict);
46 static int _GB2312_mbsinit(const mbstate_t *);
47 static size_t _GB2312_wcrtomb(char * __restrict, wchar_t,
48 mbstate_t * __restrict);
56 _GB2312_init(struct xlocale_ctype *l, _RuneLocale *rl)
60 l->__mbrtowc = _GB2312_mbrtowc;
61 l->__wcrtomb = _GB2312_wcrtomb;
62 l->__mbsinit = _GB2312_mbsinit;
64 l->__mb_sb_limit = 128;
69 _GB2312_mbsinit(const mbstate_t *ps)
72 return (ps == NULL || ((const _GB2312State *)ps)->count == 0);
76 _GB2312_check(const char *str, size_t n)
78 const u_char *s = (const u_char *)str;
81 /* Incomplete multibyte sequence */
83 if (s[0] >= 0xa1 && s[0] <= 0xfe) {
85 /* Incomplete multibyte sequence */
87 if (s[1] < 0xa1 || s[1] > 0xfe)
88 /* Invalid multibyte sequence */
91 } else if (s[0] & 0x80) {
92 /* Invalid multibyte sequence */
99 _GB2312_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
100 mbstate_t * __restrict ps)
107 gs = (_GB2312State *)ps;
109 if (gs->count < 0 || gs->count > sizeof(gs->bytes)) {
120 ncopy = MIN(MIN(n, MB_CUR_MAX), sizeof(gs->bytes) - gs->count);
121 memcpy(gs->bytes + gs->count, s, ncopy);
124 s = (char *)gs->bytes;
127 if ((len = _GB2312_check(s, n)) < 0)
128 return ((size_t)len);
132 wc = (wc << 8) | (unsigned char)*s++;
136 return (wc == L'\0' ? 0 : len - ocount);
140 _GB2312_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
144 gs = (_GB2312State *)ps;
146 if (gs->count != 0) {
152 /* Reset to initial shift state (no-op) */
155 *s++ = (wc >> 8) & 0xff;