c_locale.h revision 117397
1// Wrapper for underlying C-language localization -*- C++ -*- 2 3// Copyright (C) 2001, 2002, 2003 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 2, 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// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 19// USA. 20 21// As a special exception, you may use this file as part of a free software 22// library without restriction. Specifically, if other files instantiate 23// templates or use macros or inline functions from this file, or you compile 24// this file and link it with other files to produce an executable, this 25// file does not by itself cause the resulting executable to be covered by 26// the GNU General Public License. This exception does not however 27// invalidate any other reasons why the executable file might be covered by 28// the GNU General Public License. 29 30// 31// ISO C++ 14882: 22.8 Standard locale categories. 32// 33 34// Written by Benjamin Kosnik <bkoz@redhat.com> 35 36#ifndef _CPP_BITS_C_LOCALE_H 37#define _CPP_BITS_C_LOCALE_H 1 38 39#pragma GCC system_header 40 41#include <clocale> 42 43#define _GLIBCPP_NUM_CATEGORIES 0 44 45namespace std 46{ 47 typedef int* __c_locale; 48 49 // Convert numeric value of type _Tv to string and return length of 50 // string. If snprintf is available use it, otherwise fall back to 51 // the unsafe sprintf which, in general, can be dangerous and should 52 // be avoided. 53 template<typename _Tv> 54 int 55 __convert_from_v(char* __out, 56 const int __attribute__ ((__unused__)) __size, 57 const char* __fmt, 58 _Tv __v, const __c_locale&, int __prec = -1) 59 { 60 char* __old = setlocale(LC_ALL, NULL); 61 char* __sav = static_cast<char*>(malloc(strlen(__old) + 1)); 62 if (__sav) 63 strcpy(__sav, __old); 64 setlocale(LC_ALL, "C"); 65 66 int __ret; 67#ifdef _GLIBCPP_USE_C99 68 if (__prec >= 0) 69 __ret = snprintf(__out, __size, __fmt, __prec, __v); 70 else 71 __ret = snprintf(__out, __size, __fmt, __v); 72#else 73 if (__prec >= 0) 74 __ret = sprintf(__out, __fmt, __prec, __v); 75 else 76 __ret = sprintf(__out, __fmt, __v); 77#endif 78 setlocale(LC_ALL, __sav); 79 free(__sav); 80 return __ret; 81 } 82} 83 84#endif 85