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@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_NUM_CATEGORIES 0 45 46namespace std _GLIBCXX_VISIBILITY(default) 47{ 48_GLIBCXX_BEGIN_NAMESPACE_VERSION 49 50 typedef int* __c_locale; 51 52 // Convert numeric value of type double and long double to string and 53 // return length of string. If vsnprintf is available use it, otherwise 54 // fall back to the unsafe vsprintf which, in general, can be dangerous 55 // and should be avoided. 56 inline int 57 __convert_from_v(const __c_locale&, char* __out, 58 const int __size __attribute__((__unused__)), 59 const char* __fmt, ...) 60 { 61 char* __old = std::setlocale(LC_NUMERIC, 0); 62 char* __sav = 0; 63 if (__builtin_strcmp(__old, "C")) 64 { 65 const size_t __len = __builtin_strlen(__old) + 1; 66 __sav = new char[__len]; 67 __builtin_memcpy(__sav, __old, __len); 68 std::setlocale(LC_NUMERIC, "C"); 69 } 70 71 __builtin_va_list __args; 72 __builtin_va_start(__args, __fmt); 73 74#ifdef _GLIBCXX_USE_C99 75 const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args); 76#else 77 const int __ret = __builtin_vsprintf(__out, __fmt, __args); 78#endif 79 80 __builtin_va_end(__args); 81 82 if (__sav) 83 { 84 std::setlocale(LC_NUMERIC, __sav); 85 delete [] __sav; 86 } 87 return __ret; 88 } 89 90_GLIBCXX_END_NAMESPACE_VERSION 91} // namespace 92 93#endif 94