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c3b16a5d LC |
1 | /* Duplicate a locale object. |
2 | Copyright (C) 2009 Free Software Foundation, Inc. | |
3 | ||
4 | This program is free software: you can redistribute it and/or modify | |
5 | it under the terms of the GNU Lesser General Public License as published by | |
6 | the Free Software Foundation; either version 3 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public License | |
15 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
16 | ||
17 | /* Written by Bruno Haible <bruno@clisp.org>, 2007. */ | |
18 | ||
19 | #include <config.h> | |
20 | ||
21 | /* Specification. */ | |
22 | #include <locale.h> | |
23 | ||
24 | #include <errno.h> | |
25 | #include <langinfo.h> | |
26 | #include <string.h> | |
27 | ||
28 | /* Work around an incorrect definition of the _NL_LOCALE_NAME macro in | |
29 | glibc < 2.12. | |
30 | See <http://sourceware.org/bugzilla/show_bug.cgi?id=10968>. */ | |
31 | #undef _NL_LOCALE_NAME | |
32 | #define _NL_LOCALE_NAME(category) _NL_ITEM ((category), _NL_ITEM_INDEX (-1)) | |
33 | ||
34 | #define SIZEOF(a) (sizeof(a) / sizeof(a[0])) | |
35 | ||
36 | #undef duplocale | |
37 | ||
38 | locale_t | |
39 | rpl_duplocale (locale_t locale) | |
40 | { | |
41 | /* Work around crash in the duplocale function in glibc < 2.12. | |
42 | See <http://sourceware.org/bugzilla/show_bug.cgi?id=10969>. */ | |
43 | if (locale == LC_GLOBAL_LOCALE) | |
44 | { | |
45 | /* Create a copy of the locale by fetching the name of each locale | |
46 | category, starting with LC_CTYPE. */ | |
47 | static struct { int cat; int mask; } categories[] = | |
48 | { | |
49 | { LC_NUMERIC, LC_NUMERIC_MASK }, | |
50 | { LC_TIME, LC_TIME_MASK }, | |
51 | { LC_COLLATE, LC_COLLATE_MASK }, | |
52 | { LC_MONETARY, LC_MONETARY_MASK }, | |
53 | { LC_MESSAGES, LC_MESSAGES_MASK } | |
54 | #ifdef LC_PAPER | |
55 | , { LC_PAPER, LC_PAPER_MASK } | |
56 | #endif | |
57 | #ifdef LC_NAME | |
58 | , { LC_NAME, LC_NAME_MASK } | |
59 | #endif | |
60 | #ifdef LC_ADDRESS | |
61 | , { LC_ADDRESS, LC_ADDRESS_MASK } | |
62 | #endif | |
63 | #ifdef LC_TELEPHONE | |
64 | , { LC_TELEPHONE, LC_TELEPHONE_MASK } | |
65 | #endif | |
66 | #ifdef LC_MEASUREMENT | |
67 | , { LC_MEASUREMENT, LC_MEASUREMENT_MASK } | |
68 | #endif | |
69 | #ifdef LC_IDENTIFICATION | |
70 | , { LC_IDENTIFICATION, LC_IDENTIFICATION_MASK } | |
71 | #endif | |
72 | }; | |
73 | const char *base_name; | |
74 | locale_t base_copy; | |
75 | unsigned int i; | |
76 | ||
77 | base_name = nl_langinfo (_NL_LOCALE_NAME (LC_CTYPE)); | |
78 | if (base_name[0] == '\0') | |
79 | /* Fallback code for glibc < 2.4, which did not implement | |
80 | nl_langinfo (_NL_LOCALE_NAME (category)). */ | |
81 | base_name = setlocale (LC_CTYPE, NULL); | |
82 | base_copy = newlocale (LC_ALL_MASK, base_name, NULL); | |
83 | if (base_copy == NULL) | |
84 | return NULL; | |
85 | ||
86 | for (i = 0; i < SIZEOF (categories); i++) | |
87 | { | |
88 | int category = categories[i].cat; | |
89 | int category_mask = categories[i].mask; | |
90 | const char *name = nl_langinfo (_NL_LOCALE_NAME (category)); | |
91 | if (name[0] == '\0') | |
92 | /* Fallback code for glibc < 2.4, which did not implement | |
93 | nl_langinfo (_NL_LOCALE_NAME (category)). */ | |
94 | name = setlocale (category, NULL); | |
95 | if (strcmp (name, base_name) != 0) | |
96 | { | |
97 | locale_t copy = newlocale (category_mask, name, base_copy); | |
98 | if (copy == NULL) | |
99 | { | |
100 | int saved_errno = errno; | |
101 | freelocale (base_copy); | |
102 | errno = saved_errno; | |
103 | return NULL; | |
104 | } | |
105 | /* No need to call freelocale (base_copy) if copy != base_copy; | |
106 | the newlocale function already takes care of doing it. */ | |
107 | base_copy = copy; | |
108 | } | |
109 | } | |
110 | ||
111 | return base_copy; | |
112 | } | |
113 | ||
114 | return duplocale (locale); | |
115 | } |