1 /* $OpenBSD: newlocale.c,v 1.2 2019/03/29 12:34:44 schwarze Exp $ */
2 /*
3 * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <errno.h>
19 #include <locale.h>
20 #include <string.h>
21
22 #include "rune.h"
23
24 locale_t
newlocale(int mask,const char * locname,locale_t oldloc)25 newlocale(int mask, const char *locname, locale_t oldloc)
26 {
27 int ic, flag;
28
29 /* Invalid input. */
30 if (locname == NULL || mask & ~LC_ALL_MASK) {
31 errno = EINVAL;
32 return _LOCALE_NONE;
33 }
34
35 /* Check the syntax for all selected categories. */
36 for (ic = flag = 1; ic < _LC_LAST; ic++) {
37 flag <<= 1;
38 if (ic != LC_CTYPE && mask & flag &&
39 _get_locname(ic, locname) == NULL) {
40 errno = ENOENT;
41 return _LOCALE_NONE;
42 }
43 }
44
45 /* Only character encoding has thread-specific effects. */
46 if ((mask & LC_CTYPE_MASK) == 0)
47 return oldloc == _LOCALE_UTF8 ? _LOCALE_UTF8 : _LOCALE_C;
48
49 /* The following may initialize UTF-8 for later use. */
50 if ((locname = _get_locname(LC_CTYPE, locname)) == NULL) {
51 errno = ENOENT;
52 return _LOCALE_NONE;
53 }
54 return strchr(locname, '.') == NULL ? _LOCALE_C : _LOCALE_UTF8;
55 }
56