1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
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 * Copyright (c) 2011 The FreeBSD Foundation
11 * All rights reserved.
12 * Portions of this software were developed by David Chisnall
13 * under sponsorship from the FreeBSD Foundation.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
42
43 #define __RUNETYPE_INTERNAL 1
44
45 #include <runetype.h>
46 #include <errno.h>
47 #include <limits.h>
48 #include <string.h>
49 #include <stdio.h>
50 #include <stdlib.h>
51 #include <unistd.h>
52 #include <wchar.h>
53 #include "ldpart.h"
54 #include "mblocal.h"
55 #include "setlocale.h"
56
57 #undef _CurrentRuneLocale
58 extern _RuneLocale const *_CurrentRuneLocale;
59 #ifndef __NO_TLS
60 /*
61 * A cached version of the runes for this thread. Used by ctype.h
62 */
63 _Thread_local const _RuneLocale *_ThreadRuneLocale;
64 #endif
65
66 extern int __mb_sb_limit;
67
68 extern _RuneLocale *_Read_RuneMagi(const char *);
69
70 static int __setrunelocale(struct xlocale_ctype *l, const char *);
71
72 static void
destruct_ctype(void * v)73 destruct_ctype(void *v)
74 {
75 struct xlocale_ctype *l = v;
76
77 if (&_DefaultRuneLocale != l->runes)
78 free(l->runes);
79 free(l);
80 }
81
82 const _RuneLocale *
__getCurrentRuneLocale(void)83 __getCurrentRuneLocale(void)
84 {
85
86 return (XLOCALE_CTYPE(__get_locale())->runes);
87 }
88
89 static void
free_runes(_RuneLocale * rl)90 free_runes(_RuneLocale *rl)
91 {
92 if ((rl != &_DefaultRuneLocale) && (rl)) {
93 free(rl);
94 }
95 }
96
97 static int
__setrunelocale(struct xlocale_ctype * l,const char * encoding)98 __setrunelocale(struct xlocale_ctype *l, const char *encoding)
99 {
100 _RuneLocale *rl;
101 int ret;
102 char *path;
103 struct xlocale_ctype saved = *l;
104
105 /*
106 * The "C" and "POSIX" locale are always here.
107 */
108 if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
109 free_runes(saved.runes);
110 (void) _none_init(l, (_RuneLocale*)&_DefaultRuneLocale);
111 return (0);
112 }
113
114 /* Range checking not needed, encoding length already checked before */
115 if (asprintf(&path, "%s/%s/LC_CTYPE", _PathLocale, encoding) == -1)
116 return (errno);
117
118 if ((rl = _Read_RuneMagi(path)) == NULL) {
119 free(path);
120 errno = EINVAL;
121 return (errno);
122 }
123 free(path);
124
125 l->__mbrtowc = NULL;
126 l->__mbsinit = NULL;
127 l->__mbsnrtowcs = NULL;
128 l->__wcrtomb = NULL;
129 l->__wcsnrtombs = NULL;
130
131 rl->__sputrune = NULL;
132 rl->__sgetrune = NULL;
133 if (strcmp(rl->__encoding, "NONE:US-ASCII") == 0)
134 ret = _ascii_init(l, rl);
135 else if (strncmp(rl->__encoding, "NONE", 4) == 0)
136 ret = _none_init(l, rl);
137 else if (strcmp(rl->__encoding, "UTF-8") == 0)
138 ret = _UTF8_init(l, rl);
139 else if (strcmp(rl->__encoding, "EUC-CN") == 0)
140 ret = _EUC_CN_init(l, rl);
141 else if (strcmp(rl->__encoding, "EUC-JP") == 0)
142 ret = _EUC_JP_init(l, rl);
143 else if (strcmp(rl->__encoding, "EUC-KR") == 0)
144 ret = _EUC_KR_init(l, rl);
145 else if (strcmp(rl->__encoding, "EUC-TW") == 0)
146 ret = _EUC_TW_init(l, rl);
147 else if (strcmp(rl->__encoding, "GB18030") == 0)
148 ret = _GB18030_init(l, rl);
149 else if (strcmp(rl->__encoding, "GB2312") == 0)
150 ret = _GB2312_init(l, rl);
151 else if (strcmp(rl->__encoding, "GBK") == 0)
152 ret = _GBK_init(l, rl);
153 else if (strcmp(rl->__encoding, "BIG5") == 0)
154 ret = _BIG5_init(l, rl);
155 else if (strcmp(rl->__encoding, "MSKanji") == 0)
156 ret = _MSKanji_init(l, rl);
157 else
158 ret = EFTYPE;
159
160 if (ret == 0) {
161 /* Free the old runes if it exists. */
162 free_runes(saved.runes);
163 } else {
164 /* Restore the saved version if this failed. */
165 memcpy(l, &saved, sizeof(struct xlocale_ctype));
166 free(rl);
167 }
168
169 return (ret);
170 }
171
172 int
__wrap_setrunelocale(const char * locale)173 __wrap_setrunelocale(const char *locale)
174 {
175 int ret = __setrunelocale(&__xlocale_global_ctype, locale);
176
177 if (ret != 0) {
178 errno = ret;
179 return (_LDP_ERROR);
180 }
181 __mb_cur_max = __xlocale_global_ctype.__mb_cur_max;
182 __mb_sb_limit = __xlocale_global_ctype.__mb_sb_limit;
183 _CurrentRuneLocale = __xlocale_global_ctype.runes;
184 return (_LDP_LOADED);
185 }
186
187 #ifndef __NO_TLS
188 void
__set_thread_rune_locale(locale_t loc)189 __set_thread_rune_locale(locale_t loc)
190 {
191
192 if (loc == NULL) {
193 _ThreadRuneLocale = &_DefaultRuneLocale;
194 } else if (loc == LC_GLOBAL_LOCALE) {
195 _ThreadRuneLocale = 0;
196 } else {
197 _ThreadRuneLocale = XLOCALE_CTYPE(loc)->runes;
198 }
199 }
200 #endif
201
202 void *
__ctype_load(const char * locale,locale_t unused __unused)203 __ctype_load(const char *locale, locale_t unused __unused)
204 {
205 struct xlocale_ctype *l = calloc(sizeof(struct xlocale_ctype), 1);
206
207 l->header.header.destructor = destruct_ctype;
208 if (__setrunelocale(l, locale)) {
209 free(l);
210 return (NULL);
211 }
212 return (l);
213 }
214