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