1// Wrapper for underlying C-language localization -*- C++ -*- 2 3// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 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 2, 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// You should have received a copy of the GNU General Public License along 18// with this library; see the file COPYING. If not, write to the Free 19// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 20// USA. 21 22// As a special exception, you may use this file as part of a free software 23// library without restriction. Specifically, if other files instantiate 24// templates or use macros or inline functions from this file, or you compile 25// this file and link it with other files to produce an executable, this 26// file does not by itself cause the resulting executable to be covered by 27// the GNU General Public License. This exception does not however 28// invalidate any other reasons why the executable file might be covered by 29// the GNU General Public License. 30 31/** @file c++locale.h 32 * This is an internal header file, included by other library headers. 33 * You should not attempt to use it directly. 34 */ 35 36// 37// ISO C++ 14882: 22.8 Standard locale categories. 38// 39 40// Written by Benjamin Kosnik <bkoz@redhat.com> 41 42#ifndef _C_LOCALE_H 43#define _C_LOCALE_H 1 44 45#pragma GCC system_header 46 47#include <clocale> 48#include <cstring> // get std::strlen 49#include <cstdio> // get std::vsnprintf or std::vsprintf 50#include <cstdarg> 51 52#define _GLIBCXX_NUM_CATEGORIES 0 53 54_GLIBCXX_BEGIN_NAMESPACE(std) 55 56 typedef int* __c_locale; 57 58 // Convert numeric value of type double and long double to string and 59 // return length of string. If vsnprintf is available use it, otherwise 60 // fall back to the unsafe vsprintf which, in general, can be dangerous 61 // and should be avoided. 62 inline int 63 __convert_from_v(const __c_locale&, char* __out, 64 const int __size __attribute__((__unused__)), 65 const char* __fmt, ...) 66 { 67 char* __old = std::setlocale(LC_NUMERIC, NULL); 68 char* __sav = NULL; 69 if (std::strcmp(__old, "C")) 70 { 71 __sav = new char[std::strlen(__old) + 1]; 72 std::strcpy(__sav, __old); 73 std::setlocale(LC_NUMERIC, "C"); 74 } 75 76 va_list __args; 77 va_start(__args, __fmt); 78 79#ifdef _GLIBCXX_USE_C99 80 const int __ret = std::vsnprintf(__out, __size, __fmt, __args); 81#else 82 const int __ret = std::vsprintf(__out, __fmt, __args); 83#endif 84 85 va_end(__args); 86 87 if (__sav) 88 { 89 std::setlocale(LC_NUMERIC, __sav); 90 delete [] __sav; 91 } 92 return __ret; 93 } 94 95_GLIBCXX_END_NAMESPACE 96 97#endif 98