1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright 2013 Garrett D'Amore <[email protected]>
5 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
6 * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
7 * Copyright (c) 1993
8 * The Regents of the University of California. All rights reserved.
9 *
10 * This code is derived from software contributed to Berkeley by
11 * Paul Borman at Krystal Technologies.
12 *
13 * Copyright (c) 2011 The FreeBSD Foundation
14 * All rights reserved.
15 * Portions of this software were developed by David Chisnall
16 * under sponsorship from the FreeBSD Foundation.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
26 * 3. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * SUCH DAMAGE.
41 */
42
43 #if defined(LIBC_SCCS) && !defined(lint)
44 static char sccsid[] = "@(#)none.c 8.1 (Berkeley) 6/4/93";
45 #endif /* LIBC_SCCS and not lint */
46 #include <sys/cdefs.h>
47 __FBSDID("$FreeBSD$");
48
49 #include <errno.h>
50 #include <limits.h>
51 #include <runetype.h>
52 #include <stddef.h>
53 #include <stdio.h>
54 #include <stdlib.h>
55 #include <string.h>
56 #include <wchar.h>
57 #include "mblocal.h"
58
59 static size_t _none_mbrtowc(wchar_t * __restrict, const char * __restrict,
60 size_t, mbstate_t * __restrict);
61 static int _none_mbsinit(const mbstate_t *);
62 static size_t _none_mbsnrtowcs(wchar_t * __restrict dst,
63 const char ** __restrict src, size_t nms, size_t len,
64 mbstate_t * __restrict ps __unused);
65 static size_t _none_wcrtomb(char * __restrict, wchar_t,
66 mbstate_t * __restrict);
67 static size_t _none_wcsnrtombs(char * __restrict, const wchar_t ** __restrict,
68 size_t, size_t, mbstate_t * __restrict);
69
70 /* setup defaults */
71
72 int __mb_cur_max = 1;
73 int __mb_sb_limit = 256; /* Expected to be <= _CACHED_RUNES */
74
75 int
_none_init(struct xlocale_ctype * l,_RuneLocale * rl)76 _none_init(struct xlocale_ctype *l, _RuneLocale *rl)
77 {
78
79 l->__mbrtowc = _none_mbrtowc;
80 l->__mbsinit = _none_mbsinit;
81 l->__mbsnrtowcs = _none_mbsnrtowcs;
82 l->__wcrtomb = _none_wcrtomb;
83 l->__wcsnrtombs = _none_wcsnrtombs;
84 l->runes = rl;
85 l->__mb_cur_max = 1;
86 l->__mb_sb_limit = 256;
87 return(0);
88 }
89
90 static int
_none_mbsinit(const mbstate_t * ps __unused)91 _none_mbsinit(const mbstate_t *ps __unused)
92 {
93
94 /*
95 * Encoding is not state dependent - we are always in the
96 * initial state.
97 */
98 return (1);
99 }
100
101 static size_t
_none_mbrtowc(wchar_t * __restrict pwc,const char * __restrict s,size_t n,mbstate_t * __restrict ps __unused)102 _none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
103 mbstate_t * __restrict ps __unused)
104 {
105
106 if (s == NULL)
107 /* Reset to initial shift state (no-op) */
108 return (0);
109 if (n == 0)
110 /* Incomplete multibyte sequence */
111 return ((size_t)-2);
112 if (pwc != NULL)
113 *pwc = (unsigned char)*s;
114 return (*s == '\0' ? 0 : 1);
115 }
116
117 static size_t
_none_wcrtomb(char * __restrict s,wchar_t wc,mbstate_t * __restrict ps __unused)118 _none_wcrtomb(char * __restrict s, wchar_t wc,
119 mbstate_t * __restrict ps __unused)
120 {
121
122 if (s == NULL)
123 /* Reset to initial shift state (no-op) */
124 return (1);
125 if (wc < 0 || wc > UCHAR_MAX) {
126 errno = EILSEQ;
127 return ((size_t)-1);
128 }
129 *s = (unsigned char)wc;
130 return (1);
131 }
132
133 static size_t
_none_mbsnrtowcs(wchar_t * __restrict dst,const char ** __restrict src,size_t nms,size_t len,mbstate_t * __restrict ps __unused)134 _none_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src,
135 size_t nms, size_t len, mbstate_t * __restrict ps __unused)
136 {
137 const char *s;
138 size_t nchr;
139
140 if (dst == NULL) {
141 s = memchr(*src, '\0', nms);
142 return (s != NULL ? s - *src : nms);
143 }
144
145 s = *src;
146 nchr = 0;
147 while (len-- > 0 && nms-- > 0) {
148 if ((*dst++ = (unsigned char)*s++) == L'\0') {
149 *src = NULL;
150 return (nchr);
151 }
152 nchr++;
153 }
154 *src = s;
155 return (nchr);
156 }
157
158 static size_t
_none_wcsnrtombs(char * __restrict dst,const wchar_t ** __restrict src,size_t nwc,size_t len,mbstate_t * __restrict ps __unused)159 _none_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src,
160 size_t nwc, size_t len, mbstate_t * __restrict ps __unused)
161 {
162 const wchar_t *s;
163 size_t nchr;
164
165 if (dst == NULL) {
166 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) {
167 if (*s < 0 || *s > UCHAR_MAX) {
168 errno = EILSEQ;
169 return ((size_t)-1);
170 }
171 }
172 return (s - *src);
173 }
174
175 s = *src;
176 nchr = 0;
177 while (len-- > 0 && nwc-- > 0) {
178 if (*s < 0 || *s > UCHAR_MAX) {
179 *src = s;
180 errno = EILSEQ;
181 return ((size_t)-1);
182 }
183 if ((*dst++ = *s++) == '\0') {
184 *src = NULL;
185 return (nchr);
186 }
187 nchr++;
188 }
189 *src = s;
190 return (nchr);
191 }
192
193 /* setup defaults */
194
195 struct xlocale_ctype __xlocale_global_ctype = {
196 {{0}, "C"},
197 (_RuneLocale*)&_DefaultRuneLocale,
198 _none_mbrtowc,
199 _none_mbsinit,
200 _none_mbsnrtowcs,
201 _none_wcrtomb,
202 _none_wcsnrtombs,
203 1, /* __mb_cur_max, */
204 256 /* __mb_sb_limit */
205 };
206
207 struct xlocale_ctype __xlocale_C_ctype = {
208 {{0}, "C"},
209 (_RuneLocale*)&_DefaultRuneLocale,
210 _none_mbrtowc,
211 _none_mbsinit,
212 _none_mbsnrtowcs,
213 _none_wcrtomb,
214 _none_wcsnrtombs,
215 1, /* __mb_cur_max, */
216 256 /* __mb_sb_limit */
217 };
218