setrunelocale.c revision 330897 
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 * 4. 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: stable/11/lib/libc/locale/setrunelocale.c 330897 2018-03-14 03:19:51Z eadler $");
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
58extern _RuneLocale const *_CurrentRuneLocale;
59#ifndef __NO_TLS
60/*
61 * A cached version of the runes for this thread.  Used by ctype.h
62 */
63_Thread_local const _RuneLocale *_ThreadRuneLocale;
64#endif
65
66extern int __mb_sb_limit;
67
68extern _RuneLocale	*_Read_RuneMagi(const char *);
69
70static int		__setrunelocale(struct xlocale_ctype *l, const char *);
71
72static void
73destruct_ctype(void *v)
74{
75	struct xlocale_ctype *l = v;
76
77	if (&_DefaultRuneLocale != l->runes)
78		free(l->runes);
79	free(l);
80}
81
82const _RuneLocale *
83__getCurrentRuneLocale(void)
84{
85
86	return (XLOCALE_CTYPE(__get_locale())->runes);
87}
88
89static void
90free_runes(_RuneLocale *rl)
91{
92	if ((rl != &_DefaultRuneLocale) && (rl)) {
93		free(rl);
94	}
95}
96
97static int
98__setrunelocale(struct xlocale_ctype *l, const char *encoding)
99{
100	_RuneLocale *rl;
101	int ret;
102	char *path;
103	struct xlocale_ctype saved = *l;
104
105	/*
106	 * The "C" and "POSIX" locale are always here.
107	 */
108	if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
109		free_runes(saved.runes);
110		(void) _none_init(l, (_RuneLocale*)&_DefaultRuneLocale);
111		return (0);
112	}
113
114	/* Range checking not needed, encoding length already checked before */
115	asprintf(&path, "%s/%s/LC_CTYPE", _PathLocale, encoding);
116	if (path == NULL)
117		return (0);
118
119	if ((rl = _Read_RuneMagi(path)) == NULL) {
120		free(path);
121		errno = EINVAL;
122		return (errno);
123	}
124	free(path);
125
126	l->__mbrtowc = NULL;
127	l->__mbsinit = NULL;
128	l->__mbsnrtowcs = NULL;
129	l->__wcrtomb = NULL;
130	l->__wcsnrtombs = NULL;
131
132	rl->__sputrune = NULL;
133	rl->__sgetrune = NULL;
134	if (strcmp(rl->__encoding, "NONE:US-ASCII") == 0)
135		ret = _ascii_init(l, rl);
136	else if (strncmp(rl->__encoding, "NONE", 4) == 0)
137		ret = _none_init(l, rl);
138	else if (strcmp(rl->__encoding, "UTF-8") == 0)
139		ret = _UTF8_init(l, rl);
140	else if (strcmp(rl->__encoding, "EUC-CN") == 0)
141		ret = _EUC_CN_init(l, rl);
142	else if (strcmp(rl->__encoding, "EUC-JP") == 0)
143		ret = _EUC_JP_init(l, rl);
144	else if (strcmp(rl->__encoding, "EUC-KR") == 0)
145		ret = _EUC_KR_init(l, rl);
146	else if (strcmp(rl->__encoding, "EUC-TW") == 0)
147		ret = _EUC_TW_init(l, rl);
148	else if (strcmp(rl->__encoding, "GB18030") == 0)
149		ret = _GB18030_init(l, rl);
150	else if (strcmp(rl->__encoding, "GB2312") == 0)
151		ret = _GB2312_init(l, rl);
152	else if (strcmp(rl->__encoding, "GBK") == 0)
153		ret = _GBK_init(l, rl);
154	else if (strcmp(rl->__encoding, "BIG5") == 0)
155		ret = _BIG5_init(l, rl);
156	else if (strcmp(rl->__encoding, "MSKanji") == 0)
157		ret = _MSKanji_init(l, rl);
158	else
159		ret = EFTYPE;
160
161	if (ret == 0) {
162		/* Free the old runes if it exists. */
163		free_runes(saved.runes);
164	} else {
165		/* Restore the saved version if this failed. */
166		memcpy(l, &saved, sizeof(struct xlocale_ctype));
167		free(rl);
168	}
169
170	return (ret);
171}
172
173int
174__wrap_setrunelocale(const char *locale)
175{
176	int ret = __setrunelocale(&__xlocale_global_ctype, locale);
177
178	if (ret != 0) {
179		errno = ret;
180		return (_LDP_ERROR);
181	}
182	__mb_cur_max = __xlocale_global_ctype.__mb_cur_max;
183	__mb_sb_limit = __xlocale_global_ctype.__mb_sb_limit;
184	_CurrentRuneLocale = __xlocale_global_ctype.runes;
185	return (_LDP_LOADED);
186}
187
188#ifndef __NO_TLS
189void
190__set_thread_rune_locale(locale_t loc)
191{
192
193	if (loc == NULL) {
194		_ThreadRuneLocale = &_DefaultRuneLocale;
195	} else if (loc == LC_GLOBAL_LOCALE) {
196		_ThreadRuneLocale = 0;
197	} else {
198		_ThreadRuneLocale = XLOCALE_CTYPE(loc)->runes;
199	}
200}
201#endif
202
203void *
204__ctype_load(const char *locale, locale_t unused __unused)
205{
206	struct xlocale_ctype *l = calloc(sizeof(struct xlocale_ctype), 1);
207
208	l->header.header.destructor = destruct_ctype;
209	if (__setrunelocale(l, locale)) {
210		free(l);
211		return (NULL);
212	}
213	return (l);
214}
215