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 *
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 #define __RUNETYPE_INTERNAL 1
42
43 #include <runetype.h>
44 #include <errno.h>
45 #include <limits.h>
46 #include <string.h>
47 #include <stdio.h>
48 #include <stdlib.h>
49 #include <unistd.h>
50 #include <wchar.h>
51 #include "ldpart.h"
52 #include "mblocal.h"
53 #include "setlocale.h"
54
55 #undef _CurrentRuneLocale
56 extern _RuneLocale const *_CurrentRuneLocale;
57 /*
58 * A cached version of the runes for this thread. Used by ctype.h
59 */
60 _Thread_local const _RuneLocale *_ThreadRuneLocale;
61
62 extern int __mb_sb_limit;
63
64 extern _RuneLocale *_Read_RuneMagi(const char *);
65
66 static int __setrunelocale(struct xlocale_ctype *l, const char *);
67
68 static void
destruct_ctype(void * v)69 destruct_ctype(void *v)
70 {
71 struct xlocale_ctype *l = v;
72
73 if (&_DefaultRuneLocale != l->runes)
74 free(l->runes);
75 free(l);
76 }
77
78 const _RuneLocale *
__getCurrentRuneLocale(void)79 __getCurrentRuneLocale(void)
80 {
81
82 return (XLOCALE_CTYPE(__get_locale())->runes);
83 }
84
85 static void
free_runes(_RuneLocale * rl)86 free_runes(_RuneLocale *rl)
87 {
88 if ((rl != &_DefaultRuneLocale) && (rl)) {
89 free(rl);
90 }
91 }
92
93 static int
__setrunelocale(struct xlocale_ctype * l,const char * encoding)94 __setrunelocale(struct xlocale_ctype *l, const char *encoding)
95 {
96 _RuneLocale *rl;
97 int ret;
98 char *path;
99 struct xlocale_ctype saved = *l;
100
101 /*
102 * The "C" and "POSIX" locale are always here.
103 */
104 if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
105 free_runes(saved.runes);
106 (void) _none_init(l, (_RuneLocale*)&_DefaultRuneLocale);
107 return (0);
108 }
109
110 /* Range checking not needed, encoding length already checked before */
111 if (asprintf(&path, "%s/%s/LC_CTYPE", _PathLocale, encoding) == -1)
112 return (errno);
113
114 if ((rl = _Read_RuneMagi(path)) == NULL) {
115 free(path);
116 errno = EINVAL;
117 return (errno);
118 }
119 free(path);
120
121 l->__mbrtowc = NULL;
122 l->__mbsinit = NULL;
123 l->__mbsnrtowcs = NULL;
124 l->__wcrtomb = NULL;
125 l->__wcsnrtombs = NULL;
126
127 rl->__sputrune = NULL;
128 rl->__sgetrune = NULL;
129 if (strcmp(rl->__encoding, "NONE:US-ASCII") == 0)
130 ret = _ascii_init(l, rl);
131 else if (strncmp(rl->__encoding, "NONE", 4) == 0)
132 ret = _none_init(l, rl);
133 else if (strcmp(rl->__encoding, "UTF-8") == 0)
134 ret = _UTF8_init(l, rl);
135 else if (strcmp(rl->__encoding, "EUC-CN") == 0)
136 ret = _EUC_CN_init(l, rl);
137 else if (strcmp(rl->__encoding, "EUC-JP") == 0)
138 ret = _EUC_JP_init(l, rl);
139 else if (strcmp(rl->__encoding, "EUC-KR") == 0)
140 ret = _EUC_KR_init(l, rl);
141 else if (strcmp(rl->__encoding, "EUC-TW") == 0)
142 ret = _EUC_TW_init(l, rl);
143 else if (strcmp(rl->__encoding, "GB18030") == 0)
144 ret = _GB18030_init(l, rl);
145 else if (strcmp(rl->__encoding, "GB2312") == 0)
146 ret = _GB2312_init(l, rl);
147 else if (strcmp(rl->__encoding, "GBK") == 0)
148 ret = _GBK_init(l, rl);
149 else if (strcmp(rl->__encoding, "BIG5") == 0)
150 ret = _BIG5_init(l, rl);
151 else if (strcmp(rl->__encoding, "MSKanji") == 0)
152 ret = _MSKanji_init(l, rl);
153 else
154 ret = EFTYPE;
155
156 if (ret == 0) {
157 /* Free the old runes if it exists. */
158 free_runes(saved.runes);
159 /* Reset the mbstates */
160 memset(&l->c16rtomb, 0, sizeof(l->c16rtomb));
161 memset(&l->c32rtomb, 0, sizeof(l->c32rtomb));
162 memset(&l->mblen, 0, sizeof(l->mblen));
163 memset(&l->mbrlen, 0, sizeof(l->mbrlen));
164 memset(&l->mbrtoc16, 0, sizeof(l->mbrtoc16));
165 memset(&l->mbrtoc32, 0, sizeof(l->mbrtoc32));
166 memset(&l->mbrtowc, 0, sizeof(l->mbrtowc));
167 memset(&l->mbsnrtowcs, 0, sizeof(l->mbsnrtowcs));
168 memset(&l->mbsrtowcs, 0, sizeof(l->mbsrtowcs));
169 memset(&l->mbtowc, 0, sizeof(l->mbtowc));
170 memset(&l->wcrtomb, 0, sizeof(l->wcrtomb));
171 memset(&l->wcsnrtombs, 0, sizeof(l->wcsnrtombs));
172 memset(&l->wcsrtombs, 0, sizeof(l->wcsrtombs));
173 memset(&l->wctomb, 0, sizeof(l->wctomb));
174 } else {
175 /* Restore the saved version if this failed. */
176 memcpy(l, &saved, sizeof(struct xlocale_ctype));
177 free(rl);
178 }
179
180 return (ret);
181 }
182
183 int
__wrap_setrunelocale(const char * locale)184 __wrap_setrunelocale(const char *locale)
185 {
186 int ret = __setrunelocale(&__xlocale_global_ctype, locale);
187
188 if (ret != 0) {
189 errno = ret;
190 return (_LDP_ERROR);
191 }
192 __mb_cur_max = __xlocale_global_ctype.__mb_cur_max;
193 __mb_sb_limit = __xlocale_global_ctype.__mb_sb_limit;
194 _CurrentRuneLocale = __xlocale_global_ctype.runes;
195 return (_LDP_LOADED);
196 }
197
198 void
__set_thread_rune_locale(locale_t loc)199 __set_thread_rune_locale(locale_t loc)
200 {
201
202 if (loc == NULL) {
203 _ThreadRuneLocale = &_DefaultRuneLocale;
204 } else if (loc == LC_GLOBAL_LOCALE) {
205 _ThreadRuneLocale = 0;
206 } else {
207 _ThreadRuneLocale = XLOCALE_CTYPE(loc)->runes;
208 }
209 }
210
211 void *
__ctype_load(const char * locale,locale_t unused __unused)212 __ctype_load(const char *locale, locale_t unused __unused)
213 {
214 struct xlocale_ctype *l = calloc(sizeof(struct xlocale_ctype), 1);
215 if (l == NULL)
216 return (NULL);
217
218 l->header.header.destructor = destruct_ctype;
219 if (__setrunelocale(l, locale)) {
220 free(l);
221 return (NULL);
222 }
223 return (l);
224 }
225