1 // Wrapper for underlying C-language localization -*- C++ -*- 2 3 // Copyright (C) 2001-2013 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 (at) 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_NUM_CATEGORIES 0 44 45 namespace std _GLIBCXX_VISIBILITY(default) 46 { 47 _GLIBCXX_BEGIN_NAMESPACE_VERSION 48 49 typedef int* __c_locale; 50 51 // Convert numeric value of type double and long double to string and 52 // return length of string. If vsnprintf is available use it, otherwise 53 // fall back to the unsafe vsprintf which, in general, can be dangerous 54 // and should be avoided. 55 inline int 56 __convert_from_v(const __c_locale&, char* __out, 57 const int __size __attribute__((__unused__)), 58 const char* __fmt, ...) 59 { 60 char* __old = std::setlocale(LC_NUMERIC, 0); 61 char* __sav = 0; 62 if (__old && __builtin_strcmp(__old, "C")) 63 { 64 const size_t __len = __builtin_strlen(__old) + 1; 65 __sav = new char[__len]; 66 __builtin_memcpy(__sav, __old, __len); 67 std::setlocale(LC_NUMERIC, "C"); 68 } 69 70 __builtin_va_list __args; 71 __builtin_va_start(__args, __fmt); 72 73 #ifdef _GLIBCXX_USE_C99 74 const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args); 75 #else 76 const int __ret = __builtin_vsprintf(__out, __fmt, __args); 77 #endif 78 79 __builtin_va_end(__args); 80 81 if (__sav) 82 { 83 std::setlocale(LC_NUMERIC, __sav); 84 delete [] __sav; 85 } 86 return __ret; 87 } 88 89 _GLIBCXX_END_NAMESPACE_VERSION 90 } // namespace 91 92 #endif 93
