1 /* $NetBSD: newlocale.c,v 1.5 2024/01/20 14:52:48 christos Exp $ */
2
3 /*-
4 * Copyright (c)2008, 2011 Citrus Project,
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __RCSID("$NetBSD: newlocale.c,v 1.5 2024/01/20 14:52:48 christos Exp $");
31
32 #include "namespace.h"
33 #include <assert.h>
34 #include <errno.h>
35 #include <locale.h>
36 #include <stdlib.h>
37 #include <string.h>
38
39 #include "setlocale_local.h"
40
__weak_alias(newlocale,_newlocale)41 __weak_alias(newlocale, _newlocale)
42
43 locale_t
44 newlocale(int mask, const char *name, locale_t src)
45 {
46 struct _locale *dst;
47 char head[_LOCALENAME_LEN_MAX * (_LC_LAST - 1)], *tail;
48 const char *tokens[_LC_LAST - 1];
49 _locale_set_t l;
50 int i, howmany, categories[_LC_LAST - 1];
51
52 if (name == NULL)
53 name = _C_LOCALE;
54 dst = malloc(sizeof(*dst));
55 if (dst == NULL)
56 return (locale_t)NULL;
57 if (src == NULL)
58 src = _current_locale();
59 memcpy(dst, src, sizeof(*src));
60 if (strlcpy(&head[0], name, sizeof(head)) >= sizeof(head)) {
61 free(dst);
62 return (locale_t)NULL;
63 }
64 tokens[0] = (const char *)&head[0];
65 tail = __UNCONST(strchr(tokens[0], '/'));
66 if (tail == NULL) {
67 for (i = 1; i < _LC_LAST; ++i) {
68 if (mask & (1 << i)) {
69 l = _find_category(i);
70 _DIAGASSERT(l != NULL);
71 (*l)(tokens[0], dst);
72 }
73 }
74 } else {
75 *tail++ = '\0';
76 howmany = 0;
77 for (i = 1; i < _LC_LAST; ++i) {
78 if (mask & (1 << i))
79 categories[howmany++] = i;
80 }
81 if (howmany-- > 0) {
82 for (i = 1; i < howmany; ++i) {
83 *tail++ = '\0';
84 tokens[i] = (const char *)tail;
85 tail = __UNCONST(strchr(tokens[i], '/'));
86 if (tail == NULL) {
87 free(dst);
88 return NULL;
89 }
90 }
91 *tail++ = '\0';
92 tokens[howmany] = tail;
93 tail = __UNCONST(strchr(tokens[howmany], '/'));
94 if (tail != NULL) {
95 free(dst);
96 return NULL;
97 }
98 for (i = 0; i <= howmany; ++i) {
99 l = _find_category(categories[i]);
100 _DIAGASSERT(l != NULL);
101 (*l)(tokens[i], dst);
102 }
103 }
104 }
105 if (_setlocale_cache(dst, NULL)) {
106 free(dst);
107 return NULL;
108 }
109 return (locale_t)dst;
110 }
111