2 * Copyright (c) 2011 The FreeBSD Foundation
5 * This software was developed by David Chisnall under sponsorship from
6 * the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $FreeBSD: head/lib/libc/locale/xlocale.c 303495 2016-07-29 17:18:47Z ed $
32 #include "namespace.h"
38 #include "libc_private.h"
39 #include "xlocale_private.h"
40 #include "un-namespace.h"
43 * Each locale loader declares a global component. This is used by setlocale()
44 * and also by xlocale with LC_GLOBAL_LOCALE..
46 extern struct xlocale_component __xlocale_global_collate;
47 extern struct xlocale_component __xlocale_global_ctype;
48 extern struct xlocale_component __xlocale_global_monetary;
49 extern struct xlocale_component __xlocale_global_numeric;
50 extern struct xlocale_component __xlocale_global_time;
51 extern struct xlocale_component __xlocale_global_messages;
53 * And another version for the statically-allocated C locale. We only have
54 * components for the parts that are expected to be sensible.
56 extern struct xlocale_component __xlocale_C_collate;
57 extern struct xlocale_component __xlocale_C_ctype;
60 * The locale for this thread.
62 __thread locale_t __thread_locale;
64 * Flag indicating that one or more per-thread locales exist.
66 int __has_thread_locale;
68 * Private functions in setlocale.c.
70 const char * __get_locale_env(int category);
71 int __get_locale_str(int category, const char *str, char * const res);
72 int __detect_path_locale(void);
74 struct _xlocale __xlocale_global_locale = {
77 &__xlocale_global_collate,
78 &__xlocale_global_ctype,
79 &__xlocale_global_monetary,
80 &__xlocale_global_numeric,
81 &__xlocale_global_time,
82 &__xlocale_global_messages
84 .monetary_locale_changed = 1,
85 .using_monetary_locale = 0,
86 .numeric_locale_changed = 1,
87 .using_numeric_locale = 0
90 struct _xlocale __xlocale_C_locale = {
97 .monetary_locale_changed = 1,
98 .using_monetary_locale = 0,
99 .numeric_locale_changed = 1,
100 .using_numeric_locale = 0
103 static void*(*constructors[])(const char*, locale_t) =
113 static pthread_key_t locale_info_key;
115 static locale_t thread_local_locale;
117 static void init_key(void)
120 _pthread_key_create(&locale_info_key, xlocale_release);
121 _pthread_setspecific(locale_info_key, (void*)42);
122 if (_pthread_getspecific(locale_info_key) == (void*)42) {
123 _pthread_setspecific(locale_info_key, 0);
127 /* At least one per-thread locale has now been set. */
128 __has_thread_locale = 1;
129 __detect_path_locale();
132 static pthread_once_t once_control = PTHREAD_ONCE_INIT;
135 get_thread_locale(void)
138 _once(&once_control, init_key);
140 return (fake_tls ? thread_local_locale :
141 _pthread_getspecific(locale_info_key));
145 set_thread_locale(locale_t loc)
147 locale_t l = (loc == LC_GLOBAL_LOCALE) ? 0 : loc;
149 _once(&once_control, init_key);
152 xlocale_retain((struct xlocale_refcounted*)l);
154 locale_t old = _pthread_getspecific(locale_info_key);
155 if ((NULL != old) && (l != old)) {
156 xlocale_release((struct xlocale_refcounted*)old);
159 thread_local_locale = l;
161 _pthread_setspecific(locale_info_key, l);
164 __set_thread_rune_locale(loc);
168 * Clean up a locale, once its reference count reaches zero. This function is
169 * called by xlocale_release(), it should not be called directly.
172 destruct_locale(void *l)
176 for (int type=0 ; type<XLC_LAST ; type++) {
177 if (loc->components[type]) {
178 xlocale_release(loc->components[type]);
188 * Allocates a new, uninitialised, locale.
193 locale_t new = calloc(sizeof(struct _xlocale), 1);
195 new->header.destructor = destruct_locale;
196 new->monetary_locale_changed = 1;
197 new->numeric_locale_changed = 1;
201 copyflags(locale_t new, locale_t old)
203 new->using_monetary_locale = old->using_monetary_locale;
204 new->using_numeric_locale = old->using_numeric_locale;
205 new->using_time_locale = old->using_time_locale;
206 new->using_messages_locale = old->using_messages_locale;
209 static int dupcomponent(int type, locale_t base, locale_t new)
211 /* Always copy from the global locale, since it has mutable components.
213 struct xlocale_component *src = base->components[type];
215 if (&__xlocale_global_locale == base) {
216 new->components[type] = constructors[type](src->locale, new);
217 if (new->components[type]) {
218 strncpy(new->components[type]->locale, src->locale,
221 } else if (base->components[type]) {
222 new->components[type] = xlocale_retain(base->components[type]);
224 /* If the component was NULL, return success - if base is a
225 * valid locale then the flag indicating that this isn't
226 * present should be set. If it isn't a valid locale, then
227 * we're stuck anyway. */
230 return (0 != new->components[type]);
234 * Public interfaces. These are the five public functions described by the
238 locale_t newlocale(int mask, const char *locale, locale_t base)
241 const char *realLocale = locale;
243 char lres[ENCODING_LEN + 1] = "";
250 _once(&once_control, init_key);
252 locale_t new = alloc_locale();
258 copyflags(new, base);
260 if (NULL == locale) {
262 } else if ('\0' == locale[0]) {
264 } else if (strchr(locale, '/') != NULL) {
266 * Handle system native locale string
267 * e.g. "C/en_US.UTF-8/C/C/lt_LT/C"
271 } else if ('L' == locale[0] && strchr(locale, ';') != NULL) {
273 * We are called from c++ runtime lib with LC_*; string??
278 for (type=0 ; type<XLC_LAST ; type++) {
280 cp = strchr(np, '/');
281 if (cp == NULL && type == XLC_LAST - 1) {
282 cp = locale + strlen(locale);
283 } else if (cp == NULL || type == XLC_LAST - 1) {
289 if (len > ENCODING_LEN || len <= 0) {
294 strncpy(lres, np, len);
301 realLocale = __get_locale_env(type + 1);
305 __get_locale_str(type + 1, locale, lres);
308 new->components[type] =
309 constructors[type](realLocale, new);
310 if (new->components[type]) {
311 strncpy(new->components[type]->locale,
312 realLocale, ENCODING_LEN);
318 if (!dupcomponent(type, base, new)) {
326 xlocale_release(new);
333 locale_t duplocale(locale_t base)
335 locale_t new = alloc_locale();
338 _once(&once_control, init_key);
345 copyflags(new, base);
347 for (type=0 ; type<XLC_LAST ; type++) {
348 dupcomponent(type, base, new);
355 * Free a locale_t. This is quite a poorly named function. It actually
356 * disclaims a reference to a locale_t, rather than freeing it.
359 freelocale(locale_t loc)
363 * Fail if we're passed something that isn't a locale. If we're
364 * passed the global locale, pretend that we freed it but don't
365 * actually do anything.
367 if (loc != NULL && loc != LC_GLOBAL_LOCALE &&
368 loc != &__xlocale_global_locale)
369 xlocale_release(loc);
373 * Returns the name of the locale for a particular component of a locale_t.
375 const char *querylocale(int mask, locale_t loc)
377 int type = ffs(mask) - 1;
379 if (type >= XLC_LAST)
381 if (loc->components[type])
382 return (loc->components[type]->locale);
387 * Installs the specified locale_t as this thread's locale.
389 locale_t uselocale(locale_t loc)
391 locale_t old = get_thread_locale();
393 set_thread_locale(loc);
395 return (old ? old : LC_GLOBAL_LOCALE);