#include <stdlib.h>
#include <string.h>
+#include <pthread.h>
#include "locale_impl.h"
-#include "libc.h"
+#include "lock.h"
-extern const struct __locale_map __c_dot_utf8;
+#define malloc __libc_malloc
+#define calloc undef
+#define realloc undef
+#define free undef
-static const struct __locale_struct c_locale = { 0 };
-static const struct __locale_struct c_dot_utf8_locale = {
- .cat[LC_CTYPE] = &__c_dot_utf8
-};
+static int default_locale_init_done;
+static struct __locale_struct default_locale, default_ctype_locale;
int __loc_is_allocated(locale_t loc)
{
- return loc && loc != &c_locale && loc != &c_dot_utf8_locale;
+ return loc && loc != C_LOCALE && loc != UTF8_LOCALE
+ && loc != &default_locale && loc != &default_ctype_locale;
}
-locale_t __newlocale(int mask, const char *name, locale_t loc)
+static locale_t do_newlocale(int mask, const char *name, locale_t loc)
{
- int i, j;
struct __locale_struct tmp;
- const struct __locale_map *lm;
+
+ for (int i=0; i<LC_ALL; i++) {
+ tmp.cat[i] = (!(mask & (1<<i)) && loc) ? loc->cat[i] :
+ __get_locale(i, (mask & (1<<i)) ? name : "");
+ if (tmp.cat[i] == LOC_MAP_FAILED)
+ return 0;
+ }
/* For locales with allocated storage, modify in-place. */
if (__loc_is_allocated(loc)) {
- for (i=0; i<LC_ALL; i++)
- if (mask & (1<<i))
- loc->cat[i] = __get_locale(i, name);
+ *loc = tmp;
return loc;
}
- /* Otherwise, build a temporary locale object, which will only
- * be instantiated in allocated storage if it does not match
- * one of the built-in static locales. This makes the common
- * usage case for newlocale, getting a C locale with predictable
- * behavior, very fast, and more importantly, fail-safe. */
- for (j=i=0; i<LC_ALL; i++) {
- if (loc && !(mask & (1<<i)))
- lm = loc->cat[i];
- else
- lm = __get_locale(i, mask & (1<<i) ? name : "");
- if (lm) j++;
- tmp.cat[i] = lm;
- }
+ /* Otherwise, first see if we can use one of the builtin locales.
+ * This makes the common usage case for newlocale, getting a C locale
+ * with predictable behavior, very fast, and more importantly, fail-safe. */
+ if (!memcmp(&tmp, C_LOCALE, sizeof tmp)) return C_LOCALE;
+ if (!memcmp(&tmp, UTF8_LOCALE, sizeof tmp)) return UTF8_LOCALE;
- if (!j)
- return (locale_t)&c_locale;
- if (j==1 && tmp.cat[LC_CTYPE]==c_dot_utf8_locale.cat[LC_CTYPE])
- return (locale_t)&c_dot_utf8_locale;
+ /* And provide builtins for the initial default locale, and a
+ * variant of the C locale honoring the default locale's encoding. */
+ if (!default_locale_init_done) {
+ for (int i=0; i<LC_ALL; i++)
+ default_locale.cat[i] = __get_locale(i, "");
+ default_ctype_locale.cat[LC_CTYPE] = default_locale.cat[LC_CTYPE];
+ default_locale_init_done = 1;
+ }
+ if (!memcmp(&tmp, &default_locale, sizeof tmp)) return &default_locale;
+ if (!memcmp(&tmp, &default_ctype_locale, sizeof tmp))
+ return &default_ctype_locale;
+ /* If no builtin locale matched, attempt to allocate and copy. */
if ((loc = malloc(sizeof *loc))) *loc = tmp;
return loc;
}
+locale_t __newlocale(int mask, const char *name, locale_t loc)
+{
+ LOCK(__locale_lock);
+ loc = do_newlocale(mask, name, loc);
+ UNLOCK(__locale_lock);
+ return loc;
+}
+
weak_alias(__newlocale, newlocale);