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 <errno.h>
37 #include <limits.h>
38 #include <stddef.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <wchar.h>
43 #include <note.h>
44 #include "runetype.h"
45 #include "mblocal.h"
46
47 static size_t _none_mbrtowc(wchar_t *_RESTRICT_KYWD,
48 const char *_RESTRICT_KYWD, size_t, mbstate_t *_RESTRICT_KYWD);
49
50 static int _none_mbsinit(const mbstate_t *);
51 static size_t _none_mbsnrtowcs(wchar_t *_RESTRICT_KYWD dst,
52 const char **_RESTRICT_KYWD src, size_t nms, size_t len,
53 mbstate_t *_RESTRICT_KYWD);
54 static size_t _none_wcrtomb(char *_RESTRICT_KYWD, wchar_t,
55 mbstate_t *_RESTRICT_KYWD);
56 static size_t _none_wcsnrtombs(char *_RESTRICT_KYWD,
57 const wchar_t **_RESTRICT_KYWD,
58 size_t, size_t, mbstate_t *_RESTRICT_KYWD);
59
60 /* setup defaults */
61
62 int
63 _none_init(_RuneLocale *rl)
64 {
65 charset_is_ascii = 1;
66
67 __mbrtowc = _none_mbrtowc;
68 __mbsinit = _none_mbsinit;
69 __mbsnrtowcs = _none_mbsnrtowcs;
70 __wcrtomb = _none_wcrtomb;
71 __wcsnrtombs = _none_wcsnrtombs;
72 _CurrentRuneLocale = rl;
73 return (0);
74 }
75
76 static int
77 _none_mbsinit(const mbstate_t *unused)
78 {
79 _NOTE(ARGUNUSED(unused));
80
81 /*
82 * Encoding is not state dependent - we are always in the
83 * initial state.
84 */
85 return (1);
86 }
87
88 static size_t
89 _none_mbrtowc(wchar_t *_RESTRICT_KYWD pwc, const char *_RESTRICT_KYWD s,
90 size_t n, mbstate_t *_RESTRICT_KYWD unused)
91 {
92 _NOTE(ARGUNUSED(unused));
93
94 if (s == NULL)
95 /* Reset to initial shift state (no-op) */
96 return (0);
97 if (n == 0)
98 /* Incomplete multibyte sequence */
99 return ((size_t)-2);
100 if (pwc != NULL)
101 *pwc = (unsigned char)*s;
102 return (*s == '\0' ? 0 : 1);
103 }
104
105 static size_t
106 _none_wcrtomb(char *_RESTRICT_KYWD s, wchar_t wc,
107 mbstate_t *_RESTRICT_KYWD unused)
108 {
109 _NOTE(ARGUNUSED(unused));
110
111 if (s == NULL)
112 /* Reset to initial shift state (no-op) */
113 return (1);
114 if (wc < 0 || wc > UCHAR_MAX) {
115 errno = EILSEQ;
116 return ((size_t)-1);
117 }
118 *s = (unsigned char)wc;
119 return (1);
120 }
121
122 static size_t
123 _none_mbsnrtowcs(wchar_t *_RESTRICT_KYWD dst, const char **_RESTRICT_KYWD src,
124 size_t nms, size_t len, mbstate_t *_RESTRICT_KYWD unused)
125 {
126 const char *s;
127 size_t nchr;
128
129 _NOTE(ARGUNUSED(unused));
130
131 if (dst == NULL) {
132 s = memchr(*src, '\0', nms);
133 return (s != NULL ? s - *src : nms);
134 }
135
136 s = *src;
137 nchr = 0;
138 while (len-- > 0 && nms-- > 0) {
139 if ((*dst++ = (unsigned char)*s++) == L'\0') {
140 *src = NULL;
141 return (nchr);
142 }
143 nchr++;
144 }
145 *src = s;
146 return (nchr);
147 }
148
149 static size_t
150 _none_wcsnrtombs(char *_RESTRICT_KYWD dst, const wchar_t **_RESTRICT_KYWD src,
151 size_t nwc, size_t len, mbstate_t *_RESTRICT_KYWD unused)
152 {
153 const wchar_t *s;
154 size_t nchr;
155
156 _NOTE(ARGUNUSED(unused));
157
158 if (dst == NULL) {
159 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) {
160 if (*s < 0 || *s > UCHAR_MAX) {
161 errno = EILSEQ;
162 return ((size_t)-1);
163 }
164 }
165 return (s - *src);
166 }
167
168 s = *src;
169 nchr = 0;
170 while (len-- > 0 && nwc-- > 0) {
171 if (*s < 0 || *s > UCHAR_MAX) {
172 errno = EILSEQ;
173 return ((size_t)-1);
174 }
175 if ((*dst++ = *s++) == '\0') {
176 *src = NULL;
177 return (nchr);
178 }
179 nchr++;
180 }
181 *src = s;
182 return (nchr);
183 }
184
185 /* setup defaults */
186
187 size_t (*__mbrtowc)(wchar_t *_RESTRICT_KYWD, const char *_RESTRICT_KYWD,
188 size_t, mbstate_t *_RESTRICT_KYWD) = _none_mbrtowc;
189
190 int (*__mbsinit)(const mbstate_t *) = _none_mbsinit;
191
192 size_t (*__mbsnrtowcs)(wchar_t *_RESTRICT_KYWD, const char **_RESTRICT_KYWD,
193 size_t, size_t, mbstate_t *_RESTRICT_KYWD) = _none_mbsnrtowcs;
194
195 size_t (*__wcrtomb)(char *_RESTRICT_KYWD, wchar_t, mbstate_t *_RESTRICT_KYWD) =
196 _none_wcrtomb;
197
198 size_t (*__wcsnrtombs)(char *_RESTRICT_KYWD, const wchar_t **_RESTRICT_KYWD,
199 size_t, size_t, mbstate_t *_RESTRICT_KYWD) = _none_wcsnrtombs;