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 * 4. 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
38#include <sys/cdefs.h>
39__FBSDID("$FreeBSD: stable/11/lib/libc/locale/setrunelocale.c 337484 2018-08-08 18:52:37Z bdrewery $");
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
56extern _RuneLocale const *_CurrentRuneLocale;
57#ifndef __NO_TLS
58/*
59 * A cached version of the runes for this thread.  Used by ctype.h
60 */
61_Thread_local const _RuneLocale *_ThreadRuneLocale;
62#endif
63
64extern int __mb_sb_limit;
65
66extern _RuneLocale	*_Read_RuneMagi(const char *);
67
68static int		__setrunelocale(struct xlocale_ctype *l, const char *);
69
70static void
71destruct_ctype(void *v)
72{
73	struct xlocale_ctype *l = v;
74
75	if (&_DefaultRuneLocale != l->runes)
76		free(l->runes);
77	free(l);
78}
79
80const _RuneLocale *
81__getCurrentRuneLocale(void)
82{
83
84	return (XLOCALE_CTYPE(__get_locale())->runes);
85}
86
87static void
88free_runes(_RuneLocale *rl)
89{
90	if ((rl != &_DefaultRuneLocale) && (rl)) {
91		free(rl);
92	}
93}
94
95static int
96__setrunelocale(struct xlocale_ctype *l, const char *encoding)
97{
98	_RuneLocale *rl;
99	int ret;
100	char *path;
101	struct xlocale_ctype saved = *l;
102
103	/*
104	 * The "C" and "POSIX" locale are always here.
105	 */
106	if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
107		free_runes(saved.runes);
108		(void) _none_init(l, (_RuneLocale*)&_DefaultRuneLocale);
109		return (0);
110	}
111
112	/* Range checking not needed, encoding length already checked before */
113	if (asprintf(&path, "%s/%s/LC_CTYPE", _PathLocale, encoding) == -1)
114		return (errno);
115
116	if ((rl = _Read_RuneMagi(path)) == NULL) {
117		free(path);
118		errno = EINVAL;
119		return (errno);
120	}
121	free(path);
122
123	l->__mbrtowc = NULL;
124	l->__mbsinit = NULL;
125	l->__mbsnrtowcs = NULL;
126	l->__wcrtomb = NULL;
127	l->__wcsnrtombs = NULL;
128
129	rl->__sputrune = NULL;
130	rl->__sgetrune = NULL;
131	if (strcmp(rl->__encoding, "NONE:US-ASCII") == 0)
132		ret = _ascii_init(l, rl);
133	else if (strncmp(rl->__encoding, "NONE", 4) == 0)
134		ret = _none_init(l, rl);
135	else if (strcmp(rl->__encoding, "UTF-8") == 0)
136		ret = _UTF8_init(l, rl);
137	else if (strcmp(rl->__encoding, "EUC-CN") == 0)
138		ret = _EUC_CN_init(l, rl);
139	else if (strcmp(rl->__encoding, "EUC-JP") == 0)
140		ret = _EUC_JP_init(l, rl);
141	else if (strcmp(rl->__encoding, "EUC-KR") == 0)
142		ret = _EUC_KR_init(l, rl);
143	else if (strcmp(rl->__encoding, "EUC-TW") == 0)
144		ret = _EUC_TW_init(l, rl);
145	else if (strcmp(rl->__encoding, "GB18030") == 0)
146		ret = _GB18030_init(l, rl);
147	else if (strcmp(rl->__encoding, "GB2312") == 0)
148		ret = _GB2312_init(l, rl);
149	else if (strcmp(rl->__encoding, "GBK") == 0)
150		ret = _GBK_init(l, rl);
151	else if (strcmp(rl->__encoding, "BIG5") == 0)
152		ret = _BIG5_init(l, rl);
153	else if (strcmp(rl->__encoding, "MSKanji") == 0)
154		ret = _MSKanji_init(l, rl);
155	else
156		ret = EFTYPE;
157
158	if (ret == 0) {
159		/* Free the old runes if it exists. */
160		free_runes(saved.runes);
161	} else {
162		/* Restore the saved version if this failed. */
163		memcpy(l, &saved, sizeof(struct xlocale_ctype));
164		free(rl);
165	}
166
167	return (ret);
168}
169
170int
171__wrap_setrunelocale(const char *locale)
172{
173	int ret = __setrunelocale(&__xlocale_global_ctype, locale);
174
175	if (ret != 0) {
176		errno = ret;
177		return (_LDP_ERROR);
178	}
179	__mb_cur_max = __xlocale_global_ctype.__mb_cur_max;
180	__mb_sb_limit = __xlocale_global_ctype.__mb_sb_limit;
181	_CurrentRuneLocale = __xlocale_global_ctype.runes;
182	return (_LDP_LOADED);
183}
184
185#ifndef __NO_TLS
186void
187__set_thread_rune_locale(locale_t loc)
188{
189
190	if (loc == NULL) {
191		_ThreadRuneLocale = &_DefaultRuneLocale;
192	} else if (loc == LC_GLOBAL_LOCALE) {
193		_ThreadRuneLocale = 0;
194	} else {
195		_ThreadRuneLocale = XLOCALE_CTYPE(loc)->runes;
196	}
197}
198#endif
199
200void *
201__ctype_load(const char *locale, locale_t unused __unused)
202{
203	struct xlocale_ctype *l = calloc(sizeof(struct xlocale_ctype), 1);
204
205	l->header.header.destructor = destruct_ctype;
206	if (__setrunelocale(l, locale)) {
207		free(l);
208		return (NULL);
209	}
210	return (l);
211}
212