1 | // Wrapper for underlying C-language localization -*- C++ -*- |
2 | |
3 | // Copyright (C) 2001-2021 Free Software Foundation, Inc. |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free |
6 | // software; you can redistribute it and/or modify it under the |
7 | // terms of the GNU General Public License as published by the |
8 | // Free Software Foundation; either version 3, or (at your option) |
9 | // any later version. |
10 | |
11 | // This library is distributed in the hope that it will be useful, |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | // GNU General Public License for more details. |
15 | |
16 | // Under Section 7 of GPL version 3, you are granted additional |
17 | // permissions described in the GCC Runtime Library Exception, version |
18 | // 3.1, as published by the Free Software Foundation. |
19 | |
20 | // You should have received a copy of the GNU General Public License and |
21 | // a copy of the GCC Runtime Library Exception along with this program; |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
23 | // <http://www.gnu.org/licenses/>. |
24 | |
25 | /** @file bits/c++locale.h |
26 | * This is an internal header file, included by other library headers. |
27 | * Do not attempt to use it directly. @headername{locale} |
28 | */ |
29 | |
30 | // |
31 | // ISO C++ 14882: 22.8 Standard locale categories. |
32 | // |
33 | |
34 | // Written by Benjamin Kosnik <bkoz@redhat.com> |
35 | |
36 | #ifndef _GLIBCXX_CXX_LOCALE_H |
37 | #define _GLIBCXX_CXX_LOCALE_H 1 |
38 | |
39 | #pragma GCC system_header |
40 | |
41 | #include <clocale> |
42 | |
43 | #define _GLIBCXX_C_LOCALE_GNU 1 |
44 | |
45 | #define _GLIBCXX_NUM_CATEGORIES 6 |
46 | |
47 | #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) |
48 | namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) |
49 | { |
50 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
51 | |
52 | extern "C" __typeof(uselocale) __uselocale; |
53 | |
54 | _GLIBCXX_END_NAMESPACE_VERSION |
55 | } // namespace |
56 | #endif |
57 | |
58 | namespace std _GLIBCXX_VISIBILITY(default) |
59 | { |
60 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
61 | |
62 | typedef __locale_t __c_locale; |
63 | |
64 | // Convert numeric value of type double and long double to string and |
65 | // return length of string. If vsnprintf is available use it, otherwise |
66 | // fall back to the unsafe vsprintf which, in general, can be dangerous |
67 | // and should be avoided. |
68 | inline int |
69 | __convert_from_v(const __c_locale& __cloc __attribute__ ((__unused__)), |
70 | char* __out, |
71 | const int __size __attribute__ ((__unused__)), |
72 | const char* __fmt, ...) |
73 | { |
74 | #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) |
75 | __c_locale __old = __gnu_cxx::__uselocale(__cloc); |
76 | #else |
77 | char* __old = std::setlocale(LC_NUMERIC, 0); |
78 | char* __sav = 0; |
79 | if (__builtin_strcmp(__old, "C" )) |
80 | { |
81 | const size_t __len = __builtin_strlen(__old) + 1; |
82 | __sav = new char[__len]; |
83 | __builtin_memcpy(__sav, __old, __len); |
84 | std::setlocale(LC_NUMERIC, "C" ); |
85 | } |
86 | #endif |
87 | |
88 | __builtin_va_list __args; |
89 | __builtin_va_start(__args, __fmt); |
90 | |
91 | #if _GLIBCXX_USE_C99_STDIO |
92 | const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args); |
93 | #else |
94 | const int __ret = __builtin_vsprintf(__out, __fmt, __args); |
95 | #endif |
96 | |
97 | __builtin_va_end(__args); |
98 | |
99 | #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) |
100 | __gnu_cxx::__uselocale(__old); |
101 | #else |
102 | if (__sav) |
103 | { |
104 | std::setlocale(LC_NUMERIC, __sav); |
105 | delete [] __sav; |
106 | } |
107 | #endif |
108 | return __ret; |
109 | } |
110 | |
111 | _GLIBCXX_END_NAMESPACE_VERSION |
112 | } // namespace |
113 | |
114 | #endif |
115 | |