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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/config/locale/generic/c_locale.h
1 // Wrapper for underlying C-language localization -*- C++ -*-
3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010
4 // Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // Under Section 7 of GPL version 3, you are granted additional
18 // permissions described in the GCC Runtime Library Exception, version
19 // 3.1, as published by the Free Software Foundation.
21 // You should have received a copy of the GNU General Public License and
22 // a copy of the GCC Runtime Library Exception along with this program;
23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 // <http://www.gnu.org/licenses/>.
26 /** @file bits/c++locale.h
27 * This is an internal header file, included by other library headers.
28 * Do not attempt to use it directly. @headername{locale}
32 // ISO C++ 14882: 22.8 Standard locale categories.
35 // Written by Benjamin Kosnik <bkoz@redhat.com>
37 #ifndef _GLIBCXX_CXX_LOCALE_H
38 #define _GLIBCXX_CXX_LOCALE_H 1
40 #pragma GCC system_header
44 #define _GLIBCXX_NUM_CATEGORIES 0
46 _GLIBCXX_BEGIN_NAMESPACE(std
)
48 typedef int* __c_locale
;
50 // Convert numeric value of type double and long double to string and
51 // return length of string. If vsnprintf is available use it, otherwise
52 // fall back to the unsafe vsprintf which, in general, can be dangerous
53 // and should be avoided.
55 __convert_from_v(const __c_locale
&, char* __out
,
56 const int __size
__attribute__((__unused__
)),
57 const char* __fmt
, ...)
59 char* __old
= std::setlocale(LC_NUMERIC
, 0);
61 if (__builtin_strcmp(__old
, "C"))
63 const size_t __len
= __builtin_strlen(__old
) + 1;
64 __sav
= new char[__len
];
65 __builtin_memcpy(__sav
, __old
, __len
);
66 std::setlocale(LC_NUMERIC
, "C");
69 __builtin_va_list __args
;
70 __builtin_va_start(__args
, __fmt
);
72 #ifdef _GLIBCXX_USE_C99
73 const int __ret
= __builtin_vsnprintf(__out
, __size
, __fmt
, __args
);
75 const int __ret
= __builtin_vsprintf(__out
, __fmt
, __args
);
78 __builtin_va_end(__args
);
82 std::setlocale(LC_NUMERIC
, __sav
);
88 _GLIBCXX_END_NAMESPACE