1 /*
2 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
3 * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
4 * Copyright (c) 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Paul Borman at Krystal Technologies.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 "lint.h"
36 #include <sys/types.h>
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 _BIG5_mbrtowc(wchar_t *_RESTRICT_KYWD,
45 const char *_RESTRICT_KYWD,
46 size_t, mbstate_t *RESTRICT_KYWD);
47 static int _BIG5_mbsinit(const mbstate_t *);
48 static size_t _BIG5_wcrtomb(char *_RESTRICT_KYWD, wchar_t,
49 mbstate_t *_RESTRICT_KYWD);
50
51 typedef struct {
52 wchar_t ch;
53 } _BIG5State;
54
55 int
56 _BIG5_init(_RuneLocale *rl)
57 {
58
59 __mbrtowc = _BIG5_mbrtowc;
60 __wcrtomb = _BIG5_wcrtomb;
61 __mbsinit = _BIG5_mbsinit;
62 _CurrentRuneLocale = rl;
63 __ctype[520] = 2;
64 charset_is_ascii = 0;
65 return (0);
66 }
67
68 static int
69 _BIG5_mbsinit(const mbstate_t *ps)
70 {
71
72 return (ps == NULL || ((const _BIG5State *)ps)->ch == 0);
73 }
74
75 static int
76 _big5_check(uint_t c)
77 {
78
79 c &= 0xff;
80 return ((c >= 0xa1 && c <= 0xfe) ? 2 : 1);
81 }
82
83 static size_t
84 _BIG5_mbrtowc(wchar_t *_RESTRICT_KYWD pwc, const char *_RESTRICT_KYWD s,
85 size_t n, mbstate_t *_RESTRICT_KYWD ps)
86 {
87 _BIG5State *bs;
88 wchar_t wc;
89 size_t len;
90
91 bs = (_BIG5State *)ps;
92
93 if ((bs->ch & ~0xFF) != 0) {
94 /* Bad conversion state. */
95 errno = EINVAL;
96 return ((size_t)-1);
97 }
98
99 if (s == NULL) {
100 s = "";
101 n = 1;
102 pwc = NULL;
103 }
104
105 if (n == 0)
106 /* Incomplete multibyte sequence */
107 return ((size_t)-2);
108
109 if (bs->ch != 0) {
110 if (*s == '\0') {
111 errno = EILSEQ;
112 return ((size_t)-1);
113 }
114 wc = (bs->ch << 8) | (*s & 0xFF);
115 if (pwc != NULL)
116 *pwc = wc;
117 bs->ch = 0;
118 return (1);
119 }
120
121 len = (size_t)_big5_check(*s);
122 wc = *s++ & 0xff;
123 if (len == 2) {
124 if (n < 2) {
125 /* Incomplete multibyte sequence */
126 bs->ch = wc;
127 return ((size_t)-2);
128 }
129 if (*s == '\0') {
130 errno = EILSEQ;
131 return ((size_t)-1);
132 }
133 wc = (wc << 8) | (*s++ & 0xff);
134 if (pwc != NULL)
135 *pwc = wc;
136 return (2);
137 } else {
138 if (pwc != NULL)
139 *pwc = wc;
140 return (wc == L'\0' ? 0 : 1);
141 }
142 }
143
144 static size_t
145 _BIG5_wcrtomb(char *_RESTRICT_KYWD s, wchar_t wc, mbstate_t *_RESTRICT_KYWD ps)
146 {
147 _BIG5State *bs;
148
149 bs = (_BIG5State *)ps;
150
151 if (bs->ch != 0) {
152 errno = EINVAL;
153 return ((size_t)-1);
154 }
155
156 if (s == NULL)
157 /* Reset to initial shift state (no-op) */
158 return (1);
159 if (wc & 0x8000) {
160 *s++ = (wc >> 8) & 0xff;
161 *s = wc & 0xff;
162 return (2);
163 }
164 *s = wc & 0xff;
165 return (1);
166 }