1 /*-
2 * Copyright (c) 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Paul Borman at Krystal Technologies.
7 *
8 * Copyright (c) 2011 The FreeBSD Foundation
9 * All rights reserved.
10 * Portions of this software were developed by David Chisnall
11 * under sponsorship from the FreeBSD Foundation.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * $FreeBSD: head/lib/libc/locale/setrunelocale.c 264038 2014-04-02 11:10:46Z theraven $
38 */
39
40
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 const _RuneLocale *_ThreadRuneLocale;
61
62 extern _RuneLocale *_Read_RuneMagi(const char *);
63
64 static int __setrunelocale(struct xlocale_ctype *l, const char *);
65
66 static void
destruct_ctype(void * v)67 destruct_ctype(void *v)
68 {
69 struct xlocale_ctype *l = v;
70
71 if (&_DefaultRuneLocale != l->runes)
72 free(l->runes);
73 free(l);
74 }
75
76 const _RuneLocale *
__getCurrentRuneLocale(void)77 __getCurrentRuneLocale(void)
78 {
79
80 return (XLOCALE_CTYPE(__get_locale())->runes);
81 }
82
83 static void
free_runes(_RuneLocale * rl)84 free_runes(_RuneLocale *rl)
85 {
86 if ((rl != &_DefaultRuneLocale) && (rl)) {
87 free(rl);
88 }
89 }
90
91 static int
__setrunelocale(struct xlocale_ctype * l,const char * encoding)92 __setrunelocale(struct xlocale_ctype *l, const char *encoding)
93 {
94 _RuneLocale *rl;
95 int ret;
96 char path[PATH_MAX];
97 struct xlocale_ctype saved = *l;
98
99 /*
100 * The "C" and "POSIX" locale are always here.
101 */
102 if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
103 free_runes(saved.runes);
104 (void) _none_init(l, (_RuneLocale*)&_DefaultRuneLocale);
105 return (0);
106 }
107
108 /* Range checking not needed, encoding length already checked before */
109 (void) snprintf(path, sizeof (path), "%s/%s/LC_CTYPE",
110 _PathLocale, encoding);
111
112 if ((rl = _Read_RuneMagi(path)) == NULL) {
113 errno = EINVAL;
114 return (errno);
115 }
116
117 l->__mbrtowc = NULL;
118 l->__mbsinit = NULL;
119 l->__mbsnrtowcs = NULL;
120 l->__wcrtomb = NULL;
121 l->__wcsnrtombs = NULL;
122
123 rl->__sputrune = NULL;
124 rl->__sgetrune = NULL;
125 if (strcmp(rl->__encoding, "NONE:US-ASCII") == 0)
126 ret = _ascii_init(l, rl);
127 else if (strncmp(rl->__encoding, "NONE", 4) == 0)
128 ret = _none_init(l, rl);
129 else if (strcmp(rl->__encoding, "UTF-8") == 0)
130 ret = _UTF8_init(l, rl);
131 else if (strcmp(rl->__encoding, "EUC-CN") == 0)
132 ret = _EUC_CN_init(l, rl);
133 else if (strcmp(rl->__encoding, "EUC-JP") == 0)
134 ret = _EUC_JP_init(l, rl);
135 else if (strcmp(rl->__encoding, "EUC-KR") == 0)
136 ret = _EUC_KR_init(l, rl);
137 else if (strcmp(rl->__encoding, "EUC-TW") == 0)
138 ret = _EUC_TW_init(l, rl);
139 else if (strcmp(rl->__encoding, "GB18030") == 0)
140 ret = _GB18030_init(l, rl);
141 else if (strcmp(rl->__encoding, "GB2312") == 0)
142 ret = _GB2312_init(l, rl);
143 else if (strcmp(rl->__encoding, "GBK") == 0)
144 ret = _GBK_init(l, rl);
145 else if (strcmp(rl->__encoding, "BIG5") == 0)
146 ret = _BIG5_init(l, rl);
147 else if (strcmp(rl->__encoding, "MSKanji") == 0)
148 ret = _MSKanji_init(l, rl);
149 else
150 ret = EFTYPE;
151
152 if (ret == 0) {
153 /* Free the old runes if it exists. */
154 free_runes(saved.runes);
155 } else {
156 /* Restore the saved version if this failed. */
157 memcpy(l, &saved, sizeof(struct xlocale_ctype));
158 free(rl);
159 }
160
161 return (ret);
162 }
163
164 int
__wrap_setrunelocale(const char * locale)165 __wrap_setrunelocale(const char *locale)
166 {
167 int ret = __setrunelocale(&__xlocale_global_ctype, locale);
168
169 if (ret != 0) {
170 errno = ret;
171 return (_LDP_ERROR);
172 }
173 __mb_cur_max = __xlocale_global_ctype.__mb_cur_max;
174 __mb_sb_limit = __xlocale_global_ctype.__mb_sb_limit;
175 _CurrentRuneLocale = __xlocale_global_ctype.runes;
176 return (_LDP_LOADED);
177 }
178
179 void
__set_thread_rune_locale(locale_t loc)180 __set_thread_rune_locale(locale_t loc)
181 {
182
183 if (loc == NULL) {
184 _ThreadRuneLocale = &_DefaultRuneLocale;
185 } else if (loc == LC_GLOBAL_LOCALE) {
186 _ThreadRuneLocale = NULL;
187 } else {
188 _ThreadRuneLocale = XLOCALE_CTYPE(loc)->runes;
189 }
190 }
191
192 void *
__ctype_load(const char * locale,locale_t unused __unused)193 __ctype_load(const char *locale, locale_t unused __unused)
194 {
195 struct xlocale_ctype *l = calloc(sizeof(struct xlocale_ctype), 1);
196
197 l->header.header.destructor = destruct_ctype;
198 if (__setrunelocale(l, locale)) {
199 free(l);
200 return (NULL);
201 }
202 return (l);
203 }
204