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#include <locale.h>
#include <string.h>
#include <sys/mman.h>
#include "locale_impl.h"
#include "libc.h"
#include "lock.h"
const char *__lctrans_impl(const char *msg, const struct __locale_map *lm)
{
const char *trans = 0;
if (lm) trans = __mo_lookup(lm->map, lm->map_size, msg);
return trans ? trans : msg;
}
static const char envvars[][12] = {
"LC_CTYPE",
"LC_NUMERIC",
"LC_TIME",
"LC_COLLATE",
"LC_MONETARY",
"LC_MESSAGES",
};
const struct __locale_map *__get_locale(int cat, const char *val)
{
static volatile int lock[1];
static void *volatile loc_head;
const struct __locale_map *p;
struct __locale_map *new = 0;
const char *path = 0, *z;
char buf[256];
size_t l, n;
if (!*val) {
(val = getenv("LC_ALL")) && *val ||
(val = getenv(envvars[cat])) && *val ||
(val = getenv("LANG")) && *val ||
(val = "C.UTF-8");
}
/* Limit name length and forbid leading dot or any slashes. */
for (n=0; n<LOCALE_NAME_MAX && val[n] && val[n]!='/'; n++);
if (val[0]=='.' || val[n]) val = "C.UTF-8";
int builtin = (val[0]=='C' && !val[1])
|| !strcmp(val, "C.UTF-8")
|| !strcmp(val, "POSIX");
if (builtin) {
if (cat == LC_CTYPE && val[1]=='.')
return (void *)&__c_dot_utf8;
return 0;
}
for (p=loc_head; p; p=p->next)
if (!strcmp(val, p->name)) return p;
LOCK(lock);
for (p=loc_head; p; p=p->next)
if (!strcmp(val, p->name)) {
UNLOCK(lock);
return p;
}
if (!libc.secure) path = getenv("MUSL_LOCPATH");
/* FIXME: add a default path? */
if (path) for (; *path; path=z+!!*z) {
z = __strchrnul(path, ':');
l = z - path - !!*z;
if (l >= sizeof buf - n - 2) continue;
memcpy(buf, path, l);
buf[l] = '/';
memcpy(buf+l+1, val, n);
buf[l+1+n] = 0;
size_t map_size;
const void *map = __map_file(buf, &map_size);
if (map) {
new = malloc(sizeof *new);
if (!new) {
__munmap((void *)map, map_size);
break;
}
new->map = map;
new->map_size = map_size;
memcpy(new->name, val, n);
new->name[n] = 0;
new->next = loc_head;
loc_head = new;
break;
}
}
/* If no locale definition was found, make a locale map
* object anyway to store the name, which is kept for the
* sake of being able to do message translations at the
* application level. */
if (!new && (new = malloc(sizeof *new))) {
new->map = __c_dot_utf8.map;
new->map_size = __c_dot_utf8.map_size;
memcpy(new->name, val, n);
new->name[n] = 0;
new->next = loc_head;
loc_head = new;
}
/* For LC_CTYPE, never return a null pointer unless the
* requested name was "C" or "POSIX". */
if (!new && cat == LC_CTYPE) new = (void *)&__c_dot_utf8;
UNLOCK(lock);
return new;
}
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