1#include <stdlib.h>
2#include <string.h>
3#include "locale_impl.h"
4#include "libc.h"
5
6int __loc_is_allocated(locale_t loc)
7{
8	return loc && loc != C_LOCALE && loc != UTF8_LOCALE;
9}
10
11locale_t __newlocale(int mask, const char *name, locale_t loc)
12{
13	int i, j;
14	struct __locale_struct tmp;
15	const struct __locale_map *lm;
16
17	/* For locales with allocated storage, modify in-place. */
18	if (__loc_is_allocated(loc)) {
19		for (i=0; i<LC_ALL; i++)
20			if (mask & (1<<i))
21				loc->cat[i] = __get_locale(i, name);
22		return loc;
23	}
24
25	/* Otherwise, build a temporary locale object, which will only
26	 * be instantiated in allocated storage if it does not match
27	 * one of the built-in static locales. This makes the common
28	 * usage case for newlocale, getting a C locale with predictable
29	 * behavior, very fast, and more importantly, fail-safe. */
30	for (j=i=0; i<LC_ALL; i++) {
31		if (loc && !(mask & (1<<i)))
32			lm = loc->cat[i];
33		else
34			lm = __get_locale(i, mask & (1<<i) ? name : "");
35		if (lm) j++;
36		tmp.cat[i] = lm;
37	}
38
39	if (!j)
40		return C_LOCALE;
41	if (j==1 && tmp.cat[LC_CTYPE]==&__c_dot_utf8)
42		return UTF8_LOCALE;
43
44	if ((loc = malloc(sizeof *loc))) *loc = tmp;
45
46	return loc;
47}
48
49weak_alias(__newlocale, newlocale);
50