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 /*
60 * A cached version of the runes for this thread. Used by ctype.h
61 */
62 _Thread_local const _RuneLocale *_ThreadRuneLocale;
63
64 extern int __mb_sb_limit;
65
66 extern _RuneLocale *_Read_RuneMagi(const char *);
67
68 static int __setrunelocale(struct xlocale_ctype *l, const char *);
69
70 static void
destruct_ctype(void * v)71 destruct_ctype(void *v)
72 {
73 struct xlocale_ctype *l = v;
74
75 if (&_DefaultRuneLocale != l->runes)
76 free(l->runes);
77 free(l);
78 }
79
80 const _RuneLocale *
__getCurrentRuneLocale(void)81 __getCurrentRuneLocale(void)
82 {
83
84 return (XLOCALE_CTYPE(__get_locale())->runes);
85 }
86
87 static void
free_runes(_RuneLocale * rl)88 free_runes(_RuneLocale *rl)
89 {
90 if ((rl != &_DefaultRuneLocale) && (rl)) {
91 free(rl);
92 }
93 }
94
95 static int
__setrunelocale(struct xlocale_ctype * l,const char * encoding)96 __setrunelocale(struct xlocale_ctype *l, const char *encoding)
97 {
98 _RuneLocale *rl;
99 int ret;
100 char *path;
101 struct xlocale_ctype saved = *l;
102
103 /*
104 * The "C" and "POSIX" locale are always here.
105 */
106 if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
107 free_runes(saved.runes);
108 (void) _none_init(l, (_RuneLocale*)&_DefaultRuneLocale);
109 return (0);
110 }
111
112 /* Range checking not needed, encoding length already checked before */
113 if (asprintf(&path, "%s/%s/LC_CTYPE", _PathLocale, encoding) == -1)
114 return (errno);
115
116 if ((rl = _Read_RuneMagi(path)) == NULL) {
117 free(path);
118 errno = EINVAL;
119 return (errno);
120 }
121 free(path);
122
123 l->__mbrtowc = NULL;
124 l->__mbsinit = NULL;
125 l->__mbsnrtowcs = NULL;
126 l->__wcrtomb = NULL;
127 l->__wcsnrtombs = NULL;
128
129 rl->__sputrune = NULL;
130 rl->__sgetrune = NULL;
131 if (strcmp(rl->__encoding, "NONE:US-ASCII") == 0)
132 ret = _ascii_init(l, rl);
133 else if (strncmp(rl->__encoding, "NONE", 4) == 0)
134 ret = _none_init(l, rl);
135 else if (strcmp(rl->__encoding, "UTF-8") == 0)
136 ret = _UTF8_init(l, rl);
137 else if (strcmp(rl->__encoding, "EUC-CN") == 0)
138 ret = _EUC_CN_init(l, rl);
139 else if (strcmp(rl->__encoding, "EUC-JP") == 0)
140 ret = _EUC_JP_init(l, rl);
141 else if (strcmp(rl->__encoding, "EUC-KR") == 0)
142 ret = _EUC_KR_init(l, rl);
143 else if (strcmp(rl->__encoding, "EUC-TW") == 0)
144 ret = _EUC_TW_init(l, rl);
145 else if (strcmp(rl->__encoding, "GB18030") == 0)
146 ret = _GB18030_init(l, rl);
147 else if (strcmp(rl->__encoding, "GB2312") == 0)
148 ret = _GB2312_init(l, rl);
149 else if (strcmp(rl->__encoding, "GBK") == 0)
150 ret = _GBK_init(l, rl);
151 else if (strcmp(rl->__encoding, "BIG5") == 0)
152 ret = _BIG5_init(l, rl);
153 else if (strcmp(rl->__encoding, "MSKanji") == 0)
154 ret = _MSKanji_init(l, rl);
155 else
156 ret = EFTYPE;
157
158 if (ret == 0) {
159 /* Free the old runes if it exists. */
160 free_runes(saved.runes);
161 /* Reset the mbstates */
162 memset(&l->c16rtomb, 0, sizeof(l->c16rtomb));
163 memset(&l->c32rtomb, 0, sizeof(l->c32rtomb));
164 memset(&l->mblen, 0, sizeof(l->mblen));
165 memset(&l->mbrlen, 0, sizeof(l->mbrlen));
166 memset(&l->mbrtoc16, 0, sizeof(l->mbrtoc16));
167 memset(&l->mbrtoc32, 0, sizeof(l->mbrtoc32));
168 memset(&l->mbrtowc, 0, sizeof(l->mbrtowc));
169 memset(&l->mbsnrtowcs, 0, sizeof(l->mbsnrtowcs));
170 memset(&l->mbsrtowcs, 0, sizeof(l->mbsrtowcs));
171 memset(&l->mbtowc, 0, sizeof(l->mbtowc));
172 memset(&l->wcrtomb, 0, sizeof(l->wcrtomb));
173 memset(&l->wcsnrtombs, 0, sizeof(l->wcsnrtombs));
174 memset(&l->wcsrtombs, 0, sizeof(l->wcsrtombs));
175 memset(&l->wctomb, 0, sizeof(l->wctomb));
176 } else {
177 /* Restore the saved version if this failed. */
178 memcpy(l, &saved, sizeof(struct xlocale_ctype));
179 free(rl);
180 }
181
182 return (ret);
183 }
184
185 int
__wrap_setrunelocale(const char * locale)186 __wrap_setrunelocale(const char *locale)
187 {
188 int ret = __setrunelocale(&__xlocale_global_ctype, locale);
189
190 if (ret != 0) {
191 errno = ret;
192 return (_LDP_ERROR);
193 }
194 __mb_cur_max = __xlocale_global_ctype.__mb_cur_max;
195 __mb_sb_limit = __xlocale_global_ctype.__mb_sb_limit;
196 _CurrentRuneLocale = __xlocale_global_ctype.runes;
197 return (_LDP_LOADED);
198 }
199
200 void
__set_thread_rune_locale(locale_t loc)201 __set_thread_rune_locale(locale_t loc)
202 {
203
204 if (loc == NULL) {
205 _ThreadRuneLocale = &_DefaultRuneLocale;
206 } else if (loc == LC_GLOBAL_LOCALE) {
207 _ThreadRuneLocale = 0;
208 } else {
209 _ThreadRuneLocale = XLOCALE_CTYPE(loc)->runes;
210 }
211 }
212
213 void *
__ctype_load(const char * locale,locale_t unused __unused)214 __ctype_load(const char *locale, locale_t unused __unused)
215 {
216 struct xlocale_ctype *l = calloc(sizeof(struct xlocale_ctype), 1);
217 if (l == NULL)
218 return (NULL);
219
220 l->header.header.destructor = destruct_ctype;
221 if (__setrunelocale(l, locale)) {
222 free(l);
223 return (NULL);
224 }
225 return (l);
226 }
227