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 #define __RUNETYPE_INTERNAL 1
41
42 #include <runetype.h>
43 #include <errno.h>
44 #include <limits.h>
45 #include <string.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <unistd.h>
49 #include <wchar.h>
50 #include "ldpart.h"
51 #include "mblocal.h"
52 #include "setlocale.h"
53
54 #undef _CurrentRuneLocale
55 extern _RuneLocale const *_CurrentRuneLocale;
56 /*
57 * A cached version of the runes for this thread. Used by ctype.h
58 */
59 _Thread_local const _RuneLocale *_ThreadRuneLocale;
60
61 extern int __mb_sb_limit;
62
63 extern _RuneLocale *_Read_RuneMagi(const char *);
64
65 static int __setrunelocale(struct xlocale_ctype *l, const char *);
66
67 static void
destruct_ctype(void * v)68 destruct_ctype(void *v)
69 {
70 struct xlocale_ctype *l = v;
71
72 if (&_DefaultRuneLocale != l->runes)
73 free(l->runes);
74 free(l);
75 }
76
77 const _RuneLocale *
__getCurrentRuneLocale(void)78 __getCurrentRuneLocale(void)
79 {
80
81 return (XLOCALE_CTYPE(__get_locale())->runes);
82 }
83
84 static void
free_runes(_RuneLocale * rl)85 free_runes(_RuneLocale *rl)
86 {
87 if ((rl != &_DefaultRuneLocale) && (rl)) {
88 free(rl);
89 }
90 }
91
92 static int
__setrunelocale(struct xlocale_ctype * l,const char * encoding)93 __setrunelocale(struct xlocale_ctype *l, const char *encoding)
94 {
95 _RuneLocale *rl;
96 int ret;
97 char *path;
98 struct xlocale_ctype saved = *l;
99
100 /*
101 * The "C" and "POSIX" locale are always here.
102 */
103 if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
104 free_runes(saved.runes);
105 (void) _none_init(l, (_RuneLocale*)&_DefaultRuneLocale);
106 return (0);
107 }
108
109 /* Range checking not needed, encoding length already checked before */
110 if (asprintf(&path, "%s/%s/LC_CTYPE", _PathLocale, encoding) == -1)
111 return (errno);
112
113 if ((rl = _Read_RuneMagi(path)) == NULL) {
114 free(path);
115 errno = EINVAL;
116 return (errno);
117 }
118 free(path);
119
120 l->__mbrtowc = NULL;
121 l->__mbsinit = NULL;
122 l->__mbsnrtowcs = NULL;
123 l->__wcrtomb = NULL;
124 l->__wcsnrtombs = NULL;
125
126 rl->__sputrune = NULL;
127 rl->__sgetrune = NULL;
128 if (strcmp(rl->__encoding, "NONE:US-ASCII") == 0)
129 ret = _ascii_init(l, rl);
130 else if (strncmp(rl->__encoding, "NONE", 4) == 0)
131 ret = _none_init(l, rl);
132 else if (strcmp(rl->__encoding, "UTF-8") == 0)
133 ret = _UTF8_init(l, rl);
134 else if (strcmp(rl->__encoding, "EUC-CN") == 0)
135 ret = _EUC_CN_init(l, rl);
136 else if (strcmp(rl->__encoding, "EUC-JP") == 0)
137 ret = _EUC_JP_init(l, rl);
138 else if (strcmp(rl->__encoding, "EUC-KR") == 0)
139 ret = _EUC_KR_init(l, rl);
140 else if (strcmp(rl->__encoding, "EUC-TW") == 0)
141 ret = _EUC_TW_init(l, rl);
142 else if (strcmp(rl->__encoding, "GB18030") == 0)
143 ret = _GB18030_init(l, rl);
144 else if (strcmp(rl->__encoding, "GB2312") == 0)
145 ret = _GB2312_init(l, rl);
146 else if (strcmp(rl->__encoding, "GBK") == 0)
147 ret = _GBK_init(l, rl);
148 else if (strcmp(rl->__encoding, "BIG5") == 0)
149 ret = _BIG5_init(l, rl);
150 else if (strcmp(rl->__encoding, "MSKanji") == 0)
151 ret = _MSKanji_init(l, rl);
152 else
153 ret = EFTYPE;
154
155 if (ret == 0) {
156 /* Free the old runes if it exists. */
157 free_runes(saved.runes);
158 /* Reset the mbstates */
159 memset(&l->c16rtomb, 0, sizeof(l->c16rtomb));
160 memset(&l->c32rtomb, 0, sizeof(l->c32rtomb));
161 memset(&l->mblen, 0, sizeof(l->mblen));
162 memset(&l->mbrlen, 0, sizeof(l->mbrlen));
163 memset(&l->mbrtoc16, 0, sizeof(l->mbrtoc16));
164 memset(&l->mbrtoc32, 0, sizeof(l->mbrtoc32));
165 memset(&l->mbrtowc, 0, sizeof(l->mbrtowc));
166 memset(&l->mbsnrtowcs, 0, sizeof(l->mbsnrtowcs));
167 memset(&l->mbsrtowcs, 0, sizeof(l->mbsrtowcs));
168 memset(&l->mbtowc, 0, sizeof(l->mbtowc));
169 memset(&l->wcrtomb, 0, sizeof(l->wcrtomb));
170 memset(&l->wcsnrtombs, 0, sizeof(l->wcsnrtombs));
171 memset(&l->wcsrtombs, 0, sizeof(l->wcsrtombs));
172 memset(&l->wctomb, 0, sizeof(l->wctomb));
173 } else {
174 /* Restore the saved version if this failed. */
175 memcpy(l, &saved, sizeof(struct xlocale_ctype));
176 free(rl);
177 }
178
179 return (ret);
180 }
181
182 int
__wrap_setrunelocale(const char * locale)183 __wrap_setrunelocale(const char *locale)
184 {
185 int ret = __setrunelocale(&__xlocale_global_ctype, locale);
186
187 if (ret != 0) {
188 errno = ret;
189 return (_LDP_ERROR);
190 }
191 __mb_cur_max = __xlocale_global_ctype.__mb_cur_max;
192 __mb_sb_limit = __xlocale_global_ctype.__mb_sb_limit;
193 _CurrentRuneLocale = __xlocale_global_ctype.runes;
194 return (_LDP_LOADED);
195 }
196
197 void
__set_thread_rune_locale(locale_t loc)198 __set_thread_rune_locale(locale_t loc)
199 {
200
201 if (loc == NULL) {
202 _ThreadRuneLocale = &_DefaultRuneLocale;
203 } else if (loc == LC_GLOBAL_LOCALE) {
204 _ThreadRuneLocale = 0;
205 } else {
206 _ThreadRuneLocale = XLOCALE_CTYPE(loc)->runes;
207 }
208 }
209
210 void *
__ctype_load(const char * locale,locale_t unused __unused)211 __ctype_load(const char *locale, locale_t unused __unused)
212 {
213 struct xlocale_ctype *l = calloc(sizeof(struct xlocale_ctype), 1);
214 if (l == NULL)
215 return (NULL);
216
217 l->header.header.destructor = destruct_ctype;
218 if (__setrunelocale(l, locale)) {
219 free(l);
220 return (NULL);
221 }
222 return (l);
223 }
224