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c84142e8 | 1 | /* Duplicate handle for selection of locales. |
581c785b | 2 | Copyright (C) 1997-2022 Free Software Foundation, Inc. |
c84142e8 | 3 | This file is part of the GNU C Library. |
c84142e8 UD |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
c84142e8 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
c84142e8 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
c84142e8 UD |
18 | |
19 | #include <locale.h> | |
ec999b8e | 20 | #include <libc-lock.h> |
c84142e8 | 21 | #include <stdlib.h> |
95ed9d84 | 22 | #include <string.h> |
c84142e8 UD |
23 | |
24 | #include <localeinfo.h> | |
25 | ||
26 | ||
27 | /* Lock for protecting global data. */ | |
9a69db29 | 28 | __libc_rwlock_define (extern , __libc_setlocale_lock attribute_hidden) |
c84142e8 UD |
29 | |
30 | ||
af85385f ZW |
31 | locale_t |
32 | __duplocale (locale_t dataset) | |
c84142e8 | 33 | { |
679e4c43 | 34 | /* This static object is returned for newlocale (LC_ALL_MASK, "C"). */ |
4b5b009c | 35 | if (dataset == _nl_C_locobj_ptr) |
679e4c43 RM |
36 | return dataset; |
37 | ||
74432447 UD |
38 | /* Handle a special value. */ |
39 | if (dataset == LC_GLOBAL_LOCALE) | |
40 | dataset = &_nl_global_locale; | |
41 | ||
af85385f | 42 | locale_t result; |
1ce8aaae | 43 | int cnt; |
a0fc81e1 | 44 | size_t names_len = 0; |
c84142e8 | 45 | |
a0fc81e1 RM |
46 | /* Calculate the total space we need to store all the names. */ |
47 | for (cnt = 0; cnt < __LC_LAST; ++cnt) | |
48 | if (cnt != LC_ALL && dataset->__names[cnt] != _nl_C_name) | |
49 | names_len += strlen (dataset->__names[cnt]) + 1; | |
c84142e8 UD |
50 | |
51 | /* Get memory. */ | |
a0fc81e1 | 52 | result = malloc (sizeof (struct __locale_struct) + names_len); |
1ce8aaae | 53 | |
c84142e8 UD |
54 | if (result != NULL) |
55 | { | |
a0fc81e1 RM |
56 | char *namep = (char *) (result + 1); |
57 | ||
58 | /* We modify global data (the usage counts). */ | |
9a69db29 | 59 | __libc_rwlock_wrlock (__libc_setlocale_lock); |
a0fc81e1 | 60 | |
5bef2820 UD |
61 | for (cnt = 0; cnt < __LC_LAST; ++cnt) |
62 | if (cnt != LC_ALL) | |
63 | { | |
64 | result->__locales[cnt] = dataset->__locales[cnt]; | |
65 | if (result->__locales[cnt]->usage_count < MAX_USAGE_COUNT) | |
66 | ++result->__locales[cnt]->usage_count; | |
a0fc81e1 RM |
67 | |
68 | if (dataset->__names[cnt] == _nl_C_name) | |
69 | result->__names[cnt] = _nl_C_name; | |
70 | else | |
71 | { | |
72 | result->__names[cnt] = namep; | |
73 | namep = __stpcpy (namep, dataset->__names[cnt]) + 1; | |
74 | } | |
5bef2820 | 75 | } |
c84142e8 | 76 | |
bf418dda UD |
77 | /* Update the special members. */ |
78 | result->__ctype_b = dataset->__ctype_b; | |
79 | result->__ctype_tolower = dataset->__ctype_tolower; | |
80 | result->__ctype_toupper = dataset->__ctype_toupper; | |
89f29a07 | 81 | |
a0fc81e1 | 82 | /* It's done. */ |
9a69db29 | 83 | __libc_rwlock_unlock (__libc_setlocale_lock); |
a0fc81e1 | 84 | } |
1fb05e3d UD |
85 | |
86 | return result; | |
c84142e8 | 87 | } |
30c14c31 | 88 | weak_alias (__duplocale, duplocale) |