Flesh out <locale.h>.
This is a trivial implementation that only supports the C/POSIX locale.
Change-Id: Ib11cea4249e1862aca96a8b94d58ea9a418cbe75
diff --git a/libc/bionic/locale.cpp b/libc/bionic/locale.cpp
index e20a1de..4fade84 100644
--- a/libc/bionic/locale.cpp
+++ b/libc/bionic/locale.cpp
@@ -30,45 +30,127 @@
#include <pthread.h>
#include <stdlib.h>
-static pthread_once_t locale_once = PTHREAD_ONCE_INIT;
-static lconv locale;
+// 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 gLocaleOnce = PTHREAD_ONCE_INIT;
+static lconv gLocale;
+
+static pthread_once_t gUselocaleKeyOnce = PTHREAD_ONCE_INIT;
+static pthread_key_t gUselocaleKey;
static void __locale_init() {
- locale.decimal_point = const_cast<char*>(".");
+ gLocale.decimal_point = const_cast<char*>(".");
char* not_available = const_cast<char*>("");
- locale.thousands_sep = not_available;
- locale.grouping = not_available;
- locale.int_curr_symbol = not_available;
- locale.currency_symbol = not_available;
- locale.mon_decimal_point = not_available;
- locale.mon_thousands_sep = not_available;
- locale.mon_grouping = not_available;
- locale.positive_sign = not_available;
- locale.negative_sign = not_available;
+ gLocale.thousands_sep = not_available;
+ gLocale.grouping = not_available;
+ gLocale.int_curr_symbol = not_available;
+ gLocale.currency_symbol = not_available;
+ gLocale.mon_decimal_point = not_available;
+ gLocale.mon_thousands_sep = not_available;
+ gLocale.mon_grouping = not_available;
+ gLocale.positive_sign = not_available;
+ gLocale.negative_sign = not_available;
- locale.int_frac_digits = CHAR_MAX;
- locale.frac_digits = CHAR_MAX;
- locale.p_cs_precedes = CHAR_MAX;
- locale.p_sep_by_space = CHAR_MAX;
- locale.n_cs_precedes = CHAR_MAX;
- locale.n_sep_by_space = CHAR_MAX;
- locale.p_sign_posn = CHAR_MAX;
- locale.n_sign_posn = CHAR_MAX;
- locale.int_p_cs_precedes = CHAR_MAX;
- locale.int_p_sep_by_space = CHAR_MAX;
- locale.int_n_cs_precedes = CHAR_MAX;
- locale.int_n_sep_by_space = CHAR_MAX;
- locale.int_p_sign_posn = CHAR_MAX;
- locale.int_n_sign_posn = CHAR_MAX;
+ gLocale.int_frac_digits = CHAR_MAX;
+ gLocale.frac_digits = CHAR_MAX;
+ gLocale.p_cs_precedes = CHAR_MAX;
+ gLocale.p_sep_by_space = CHAR_MAX;
+ gLocale.n_cs_precedes = CHAR_MAX;
+ gLocale.n_sep_by_space = CHAR_MAX;
+ gLocale.p_sign_posn = CHAR_MAX;
+ gLocale.n_sign_posn = CHAR_MAX;
+ gLocale.int_p_cs_precedes = CHAR_MAX;
+ gLocale.int_p_sep_by_space = CHAR_MAX;
+ gLocale.int_n_cs_precedes = CHAR_MAX;
+ gLocale.int_n_sep_by_space = CHAR_MAX;
+ gLocale.int_p_sign_posn = CHAR_MAX;
+ gLocale.int_n_sign_posn = CHAR_MAX;
+}
+
+static void __uselocale_key_init() {
+ pthread_key_create(&gUselocaleKey, NULL);
+}
+
+static bool __is_supported_locale(const char* locale) {
+ return (strcmp(locale, "") == 0 || strcmp(locale, "C") == 0 || strcmp(locale, "POSIX") == 0);
+}
+
+static locale_t __new_locale() {
+ return reinterpret_cast<locale_t>(malloc(sizeof(__locale_t)));
}
lconv* localeconv() {
- pthread_once(&locale_once, __locale_init);
- return &locale;
+ pthread_once(&gLocaleOnce, __locale_init);
+ return &gLocale;
}
-// setlocale(3) always fails on bionic.
-char* setlocale(int /*category*/, char const* /*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, char const* locale_name) {
+ // Is 'category' valid?
+ if (category < LC_CTYPE || category > LC_IDENTIFICATION) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ // Caller just wants to query the current locale?
+ if (locale_name == NULL) {
+ return const_cast<char*>("C");
+ }
+
+ // Caller wants one of the mandatory POSIX locales?
+ if (__is_supported_locale(locale_name)) {
+ return const_cast<char*>("C");
+ }
+
+ // We don't support any other locales.
+ errno = ENOENT;
return NULL;
}
+
+locale_t uselocale(locale_t new_locale) {
+ pthread_once(&gUselocaleKeyOnce, __uselocale_key_init);
+
+ locale_t old_locale = static_cast<locale_t>(pthread_getspecific(gUselocaleKey));
+
+ // 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(gUselocaleKey, new_locale);
+ }
+
+ return old_locale;
+}