xref: /dragonfly/lib/libc/locale/setrunelocale.c (revision fef0a4be)
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