1#include <locale.h>
  2#include <string.h>
  3#include <sys/mman.h>
  4#include <stdlib.h>
  5#include "locale_impl.h"
  6#include "libc.h"
  7#include "lock.h"
  8#include "fork_impl.h"
  9
 10#define malloc __libc_malloc
 11#define calloc undef
 12#define realloc undef
 13#define free undef
 14
 15const char *__lctrans_impl(const char *msg, const struct __locale_map *lm)
 16{
 17	const char *trans = 0;
 18	if (lm) trans = __mo_lookup(lm->map, lm->map_size, msg);
 19	return trans ? trans : msg;
 20}
 21
 22static const char envvars[][12] = {
 23	"LC_CTYPE",
 24	"LC_NUMERIC",
 25	"LC_TIME",
 26	"LC_COLLATE",
 27	"LC_MONETARY",
 28	"LC_MESSAGES",
 29};
 30
 31volatile int __locale_lock[1];
 32volatile int *const __locale_lockptr = __locale_lock;
 33
 34const struct __locale_map *__get_locale(int cat, const char *val)
 35{
 36	static void *volatile loc_head;
 37	const struct __locale_map *p;
 38	struct __locale_map *new = 0;
 39	const char *path = 0, *z;
 40	char buf[256];
 41	size_t l, n;
 42
 43	if (!*val) {
 44		(val = getenv("LC_ALL")) && *val ||
 45		(val = getenv(envvars[cat])) && *val ||
 46		(val = getenv("LANG")) && *val ||
 47		(val = "C.UTF-8");
 48	}
 49
 50	/* Limit name length and forbid leading dot or any slashes. */
 51	for (n=0; n<LOCALE_NAME_MAX && val[n] && val[n]!='/'; n++);
 52	if (val[0]=='.' || val[n]) val = "C.UTF-8";
 53	int builtin = (val[0]=='C' && !val[1])
 54		|| !strcmp(val, "C.UTF-8")
 55		|| !strcmp(val, "POSIX");
 56
 57	if (builtin) {
 58		if (cat == LC_CTYPE && val[1]=='.')
 59			return (void *)&__c_dot_utf8;
 60		return 0;
 61	}
 62
 63	for (p=loc_head; p; p=p->next)
 64		if (!strcmp(val, p->name)) return p;
 65
 66	if (!libc.secure) path = getenv("MUSL_LOCPATH");
 67	/* FIXME: add a default path? */
 68
 69	if (path) for (; *path; path=z+!!*z) {
 70		z = __strchrnul(path, ':');
 71		l = z - path;
 72		if (l >= sizeof buf - n - 2) continue;
 73		memcpy(buf, path, l);
 74		buf[l] = '/';
 75		memcpy(buf+l+1, val, n);
 76		buf[l+1+n] = 0;
 77		size_t map_size;
 78		const void *map = __map_file(buf, &map_size);
 79		if (map) {
 80			new = malloc(sizeof *new);
 81			if (!new) {
 82				__munmap((void *)map, map_size);
 83				break;
 84			}
 85			new->map = map;
 86			new->map_size = map_size;
 87			memcpy(new->name, val, n);
 88			new->name[n] = 0;
 89			new->next = loc_head;
 90			loc_head = new;
 91			break;
 92		}
 93	}
 94
 95	/* If no locale definition was found, make a locale map
 96	 * object anyway to store the name, which is kept for the
 97	 * sake of being able to do message translations at the
 98	 * application level. */
 99	if (!new && (new = malloc(sizeof *new))) {
100		new->map = __c_dot_utf8.map;
101		new->map_size = __c_dot_utf8.map_size;
102		memcpy(new->name, val, n);
103		new->name[n] = 0;
104		new->next = loc_head;
105		loc_head = new;
106	}
107
108	/* For LC_CTYPE, never return a null pointer unless the
109	 * requested name was "C" or "POSIX". */
110	if (!new && cat == LC_CTYPE) new = (void *)&__c_dot_utf8;
111
112	return new;
113}