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/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <locale.h>
#include <pthread.h>
#include <stdlib.h>
// We currently support a single locale, the "C" locale (also known as "POSIX").
struct __locale_t {
// Because we only support one locale, these are just tokens with no data.
};
static pthread_once_t g_locale_once = PTHREAD_ONCE_INIT;
static lconv g_locale;
// We don't use pthread_once for this so that we know when the resource (a TLS slot) will be taken.
static pthread_key_t g_uselocale_key;
__attribute__((constructor)) static void __bionic_tls_uselocale_key_init() {
pthread_key_create(&g_uselocale_key, NULL);
}
static void __locale_init() {
g_locale.decimal_point = const_cast<char*>(".");
char* not_available = const_cast<char*>("");
g_locale.thousands_sep = not_available;
g_locale.grouping = not_available;
g_locale.int_curr_symbol = not_available;
g_locale.currency_symbol = not_available;
g_locale.mon_decimal_point = not_available;
g_locale.mon_thousands_sep = not_available;
g_locale.mon_grouping = not_available;
g_locale.positive_sign = not_available;
g_locale.negative_sign = not_available;
g_locale.int_frac_digits = CHAR_MAX;
g_locale.frac_digits = CHAR_MAX;
g_locale.p_cs_precedes = CHAR_MAX;
g_locale.p_sep_by_space = CHAR_MAX;
g_locale.n_cs_precedes = CHAR_MAX;
g_locale.n_sep_by_space = CHAR_MAX;
g_locale.p_sign_posn = CHAR_MAX;
g_locale.n_sign_posn = CHAR_MAX;
g_locale.int_p_cs_precedes = CHAR_MAX;
g_locale.int_p_sep_by_space = CHAR_MAX;
g_locale.int_n_cs_precedes = CHAR_MAX;
g_locale.int_n_sep_by_space = CHAR_MAX;
g_locale.int_p_sign_posn = CHAR_MAX;
g_locale.int_n_sign_posn = CHAR_MAX;
}
static bool __bionic_current_locale_is_utf8 = false;
static bool __is_supported_locale(const char* locale) {
return (strcmp(locale, "") == 0 ||
strcmp(locale, "C") == 0 ||
strcmp(locale, "C.UTF-8") == 0 ||
strcmp(locale, "en_US.UTF-8") == 0 ||
strcmp(locale, "POSIX") == 0);
}
static locale_t __new_locale() {
return reinterpret_cast<locale_t>(malloc(sizeof(__locale_t)));
}
lconv* localeconv() {
pthread_once(&g_locale_once, __locale_init);
return &g_locale;
}
locale_t duplocale(locale_t l) {
locale_t clone = __new_locale();
if (clone != NULL && l != LC_GLOBAL_LOCALE) {
*clone = *l;
}
return clone;
}
void freelocale(locale_t l) {
free(l);
}
locale_t newlocale(int category_mask, const char* locale_name, locale_t /*base*/) {
// Is 'category_mask' valid?
if ((category_mask & ~LC_ALL_MASK) != 0) {
errno = EINVAL;
return NULL;
}
if (!__is_supported_locale(locale_name)) {
errno = ENOENT;
return NULL;
}
return __new_locale();
}
char* setlocale(int category, const char* locale_name) {
// Is 'category' valid?
if (category < LC_CTYPE || category > LC_IDENTIFICATION) {
errno = EINVAL;
return NULL;
}
// Caller wants to set the locale rather than just query?
if (locale_name != NULL) {
if (!__is_supported_locale(locale_name)) {
// We don't support this locale.
errno = ENOENT;
return NULL;
}
__bionic_current_locale_is_utf8 = (strstr(locale_name, "UTF-8") != NULL);
}
return const_cast<char*>(__bionic_current_locale_is_utf8 ? "C.UTF-8" : "C");
}
locale_t uselocale(locale_t new_locale) {
locale_t old_locale = static_cast<locale_t>(pthread_getspecific(g_uselocale_key));
// If this is the first call to uselocale(3) on this thread, we return LC_GLOBAL_LOCALE.
if (old_locale == NULL) {
old_locale = LC_GLOBAL_LOCALE;
}
if (new_locale != NULL) {
pthread_setspecific(g_uselocale_key, new_locale);
}
return old_locale;
}
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