1 // Wrapper for underlying C-language localization -*- C++ -*- 2 3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010 4 // Free Software Foundation, Inc. 5 // 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) 10 // any later version. 11 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. 16 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. 20 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/>. 25 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} 29 */ 30 31 // 32 // ISO C++ 14882: 22.8 Standard locale categories. 33 // 34 35 // Written by Benjamin Kosnik <bkoz (at) redhat.com> 36 37 #ifndef _GLIBCXX_CXX_LOCALE_H 38 #define _GLIBCXX_CXX_LOCALE_H 1 39 40 #pragma GCC system_header 41 42 #include <clocale> 43 44 #define _GLIBCXX_C_LOCALE_GNU 1 45 46 #define _GLIBCXX_NUM_CATEGORIES 6 47 48 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 49 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 50 { 51 _GLIBCXX_BEGIN_NAMESPACE_VERSION 52 53 extern "C" __typeof(uselocale) __uselocale; 54 55 _GLIBCXX_END_NAMESPACE_VERSION 56 } // namespace 57 #endif 58 59 namespace std _GLIBCXX_VISIBILITY(default) 60 { 61 _GLIBCXX_BEGIN_NAMESPACE_VERSION 62 63 typedef __locale_t __c_locale; 64 65 // Convert numeric value of type double and long double to string and 66 // return length of string. If vsnprintf is available use it, otherwise 67 // fall back to the unsafe vsprintf which, in general, can be dangerous 68 // and should be avoided. 69 inline int 70 __convert_from_v(const __c_locale& __cloc __attribute__ ((__unused__)), 71 char* __out, 72 const int __size __attribute__ ((__unused__)), 73 const char* __fmt, ...) 74 { 75 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 76 __c_locale __old = __gnu_cxx::__uselocale(__cloc); 77 #else 78 char* __old = std::setlocale(LC_NUMERIC, 0); 79 char* __sav = 0; 80 if (__builtin_strcmp(__old, "C")) 81 { 82 const size_t __len = __builtin_strlen(__old) + 1; 83 __sav = new char[__len]; 84 __builtin_memcpy(__sav, __old, __len); 85 std::setlocale(LC_NUMERIC, "C"); 86 } 87 #endif 88 89 __builtin_va_list __args; 90 __builtin_va_start(__args, __fmt); 91 92 #ifdef _GLIBCXX_USE_C99 93 const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args); 94 #else 95 const int __ret = __builtin_vsprintf(__out, __fmt, __args); 96 #endif 97 98 __builtin_va_end(__args); 99 100 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 101 __gnu_cxx::__uselocale(__old); 102 #else 103 if (__sav) 104 { 105 std::setlocale(LC_NUMERIC, __sav); 106 delete [] __sav; 107 } 108 #endif 109 return __ret; 110 } 111 112 _GLIBCXX_END_NAMESPACE_VERSION 113 } // namespace 114 115 #endif 116
