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