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
33 #include <sys/param.h>
34 __FBSDID("$FreeBSD$");
43 static size_t _GB2312_mbrtowc(wchar_t * __restrict, const char * __restrict,
44 size_t, mbstate_t * __restrict);
45 static int _GB2312_mbsinit(const mbstate_t *);
46 static size_t _GB2312_wcrtomb(char * __restrict, wchar_t,
47 mbstate_t * __restrict);
55 _GB2312_init(struct xlocale_ctype *l, _RuneLocale *rl)
59 l->__mbrtowc = _GB2312_mbrtowc;
60 l->__wcrtomb = _GB2312_wcrtomb;
61 l->__mbsinit = _GB2312_mbsinit;
63 l->__mb_sb_limit = 128;
68 _GB2312_mbsinit(const mbstate_t *ps)
71 return (ps == NULL || ((const _GB2312State *)ps)->count == 0);
75 _GB2312_check(const char *str, size_t n)
77 const u_char *s = (const u_char *)str;
80 /* Incomplete multibyte sequence */
82 if (s[0] >= 0xa1 && s[0] <= 0xfe) {
84 /* Incomplete multibyte sequence */
86 if (s[1] < 0xa1 || s[1] > 0xfe)
87 /* Invalid multibyte sequence */
90 } else if (s[0] & 0x80) {
91 /* Invalid multibyte sequence */
98 _GB2312_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
99 mbstate_t * __restrict ps)
106 gs = (_GB2312State *)ps;
108 if (gs->count < 0 || gs->count > sizeof(gs->bytes)) {
119 ncopy = MIN(MIN(n, MB_CUR_MAX), sizeof(gs->bytes) - gs->count);
120 memcpy(gs->bytes + gs->count, s, ncopy);
123 s = (char *)gs->bytes;
126 if ((len = _GB2312_check(s, n)) < 0)
127 return ((size_t)len);
131 wc = (wc << 8) | (unsigned char)*s++;
135 return (wc == L'\0' ? 0 : len - ocount);
139 _GB2312_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
143 gs = (_GB2312State *)ps;
145 if (gs->count != 0) {
151 /* Reset to initial shift state (no-op) */
154 *s++ = (wc >> 8) & 0xff;