1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright 2013 Garrett D'Amore <garrett@damore.org>
5 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
6 * Copyright (c) 2004 Tim J. Robbins. All rights reserved.
7 * Copyright (c) 2003 David Xu <davidxu@freebsd.org>
8 * All rights reserved.
9 *
10 * Copyright (c) 2011 The FreeBSD Foundation
11 *
12 * Portions of this software were developed by David Chisnall
13 * under sponsorship from the FreeBSD Foundation.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #include <sys/param.h>
38 #include <errno.h>
39 #include <runetype.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <wchar.h>
43 #include "mblocal.h"
44
45 static size_t _GB2312_mbrtowc(wchar_t * __restrict, const char * __restrict,
46 size_t, mbstate_t * __restrict);
47 static int _GB2312_mbsinit(const mbstate_t *);
48 static size_t _GB2312_wcrtomb(char * __restrict, wchar_t,
49 mbstate_t * __restrict);
50 static size_t _GB2312_mbsnrtowcs(wchar_t * __restrict,
51 const char ** __restrict, size_t, size_t,
52 mbstate_t * __restrict);
53 static size_t _GB2312_wcsnrtombs(char * __restrict,
54 const wchar_t ** __restrict, size_t, size_t,
55 mbstate_t * __restrict);
56
57
58 typedef struct {
59 int count;
60 u_char bytes[2];
61 } _GB2312State;
62
63 int
_GB2312_init(struct xlocale_ctype * l,_RuneLocale * rl)64 _GB2312_init(struct xlocale_ctype *l, _RuneLocale *rl)
65 {
66
67 l->runes = rl;
68 l->__mbrtowc = _GB2312_mbrtowc;
69 l->__wcrtomb = _GB2312_wcrtomb;
70 l->__mbsinit = _GB2312_mbsinit;
71 l->__mbsnrtowcs = _GB2312_mbsnrtowcs;
72 l->__wcsnrtombs = _GB2312_wcsnrtombs;
73 l->__mb_cur_max = 2;
74 l->__mb_sb_limit = 128;
75 return (0);
76 }
77
78 static int
_GB2312_mbsinit(const mbstate_t * ps)79 _GB2312_mbsinit(const mbstate_t *ps)
80 {
81
82 return (ps == NULL || ((const _GB2312State *)ps)->count == 0);
83 }
84
85 static int
_GB2312_check(const char * str,size_t n)86 _GB2312_check(const char *str, size_t n)
87 {
88 const u_char *s = (const u_char *)str;
89
90 if (n == 0)
91 /* Incomplete multibyte sequence */
92 return (-2);
93 if (s[0] >= 0xa1 && s[0] <= 0xfe) {
94 if (n < 2)
95 /* Incomplete multibyte sequence */
96 return (-2);
97 if (s[1] < 0xa1 || s[1] > 0xfe)
98 /* Invalid multibyte sequence */
99 return (-1);
100 return (2);
101 } else if (s[0] & 0x80) {
102 /* Invalid multibyte sequence */
103 return (-1);
104 }
105 return (1);
106 }
107
108 static size_t
_GB2312_mbrtowc(wchar_t * __restrict pwc,const char * __restrict s,size_t n,mbstate_t * __restrict ps)109 _GB2312_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
110 mbstate_t * __restrict ps)
111 {
112 _GB2312State *gs;
113 wchar_t wc;
114 int i, len, ocount;
115 size_t ncopy;
116
117 gs = (_GB2312State *)ps;
118
119 if (gs->count < 0 || gs->count > sizeof(gs->bytes)) {
120 errno = EINVAL;
121 return ((size_t)-1);
122 }
123
124 if (s == NULL) {
125 s = "";
126 n = 1;
127 pwc = NULL;
128 }
129
130 ncopy = MIN(MIN(n, MB_CUR_MAX), sizeof(gs->bytes) - gs->count);
131 memcpy(gs->bytes + gs->count, s, ncopy);
132 ocount = gs->count;
133 gs->count += ncopy;
134 s = (char *)gs->bytes;
135 n = gs->count;
136
137 if ((len = _GB2312_check(s, n)) < 0)
138 return ((size_t)len);
139 wc = 0;
140 i = len;
141 while (i-- > 0)
142 wc = (wc << 8) | (unsigned char)*s++;
143 if (pwc != NULL)
144 *pwc = wc;
145 gs->count = 0;
146 return (wc == L'\0' ? 0 : len - ocount);
147 }
148
149 static size_t
_GB2312_wcrtomb(char * __restrict s,wchar_t wc,mbstate_t * __restrict ps)150 _GB2312_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
151 {
152 _GB2312State *gs;
153
154 gs = (_GB2312State *)ps;
155
156 if (gs->count != 0) {
157 errno = EINVAL;
158 return ((size_t)-1);
159 }
160
161 if (s == NULL)
162 /* Reset to initial shift state (no-op) */
163 return (1);
164 if (wc & 0x8000) {
165 *s++ = (wc >> 8) & 0xff;
166 *s = wc & 0xff;
167 return (2);
168 }
169 *s = wc & 0xff;
170 return (1);
171 }
172
173 static size_t
_GB2312_mbsnrtowcs(wchar_t * __restrict dst,const char ** __restrict src,size_t nms,size_t len,mbstate_t * __restrict ps)174 _GB2312_mbsnrtowcs(wchar_t * __restrict dst,
175 const char ** __restrict src, size_t nms, size_t len,
176 mbstate_t * __restrict ps)
177 {
178 return (__mbsnrtowcs_std(dst, src, nms, len, ps, _GB2312_mbrtowc));
179 }
180
181 static size_t
_GB2312_wcsnrtombs(char * __restrict dst,const wchar_t ** __restrict src,size_t nwc,size_t len,mbstate_t * __restrict ps)182 _GB2312_wcsnrtombs(char * __restrict dst,
183 const wchar_t ** __restrict src, size_t nwc, size_t len,
184 mbstate_t * __restrict ps)
185 {
186 return (__wcsnrtombs_std(dst, src, nwc, len, ps, _GB2312_wcrtomb));
187 }
188