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#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include "locale_impl.h"
#include "libc.h"
#include "atomic.h"
static char buf[LC_ALL*(LOCALE_NAME_MAX+1)];
static char *setlocale_one_unlocked(int cat, const char *name)
{
const struct __locale_map *lm;
if (name) libc.global_locale.cat[cat] = lm = __get_locale(cat, name);
else lm = libc.global_locale.cat[cat];
return lm ? (char *)lm->name : "C";
}
char *__strchrnul(const char *, int);
char *setlocale(int cat, const char *name)
{
static volatile int lock[2];
if ((unsigned)cat > LC_ALL) return 0;
LOCK(lock);
/* For LC_ALL, setlocale is required to return a string which
* encodes the current setting for all categories. The format of
* this string is unspecified, and only the following code, which
* performs both the serialization and deserialization, depends
* on the format, so it can easily be changed if needed. */
if (cat == LC_ALL) {
int i;
if (name) {
char part[LOCALE_NAME_MAX+1] = "C.UTF-8";
const char *p = name;
for (i=0; i<LC_ALL; i++) {
const char *z = __strchrnul(p, ';');
if (z-p <= LOCALE_NAME_MAX) {
memcpy(part, p, z-p);
part[z-p] = 0;
if (*z) p = z+1;
}
setlocale_one_unlocked(i, part);
}
}
char *s = buf;
const char *part;
int same = 0;
for (i=0; i<LC_ALL; i++) {
const struct __locale_map *lm =
libc.global_locale.cat[i];
if (lm == libc.global_locale.cat[0]) same++;
part = lm ? lm->name : "C";
size_t l = strlen(part);
memcpy(s, part, l);
s[l] = ';';
s += l+1;
}
*--s = 0;
UNLOCK(lock);
return same==LC_ALL ? (char *)part : buf;
}
char *ret = setlocale_one_unlocked(cat, name);
UNLOCK(lock);
return ret;
}
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