| // Wrapper for underlying C-language localization -*- C++ -*- |
| |
| // Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 2, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING. If not, write to the Free |
| // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| // USA. |
| |
| // As a special exception, you may use this file as part of a free software |
| // library without restriction. Specifically, if other files instantiate |
| // templates or use macros or inline functions from this file, or you compile |
| // this file and link it with other files to produce an executable, this |
| // file does not by itself cause the resulting executable to be covered by |
| // the GNU General Public License. This exception does not however |
| // invalidate any other reasons why the executable file might be covered by |
| // the GNU General Public License. |
| |
| // |
| // ISO C++ 14882: 22.8 Standard locale categories. |
| // |
| |
| // Written by Benjamin Kosnik <bkoz@redhat.com> |
| |
| #ifndef _C_LOCALE_H |
| #define _C_LOCALE_H 1 |
| |
| #pragma GCC system_header |
| |
| #include <clocale> |
| #include <cstring> // get std::strlen |
| #include <cstdio> // get std::snprintf or std::sprintf |
| |
| #define _GLIBCXX_NUM_CATEGORIES 0 |
| |
| namespace std |
| { |
| typedef int* __c_locale; |
| |
| // Convert numeric value of type _Tv to string and return length of |
| // string. If snprintf is available use it, otherwise fall back to |
| // the unsafe sprintf which, in general, can be dangerous and should |
| // be avoided. |
| template<typename _Tv> |
| int |
| __convert_from_v(char* __out, |
| const int __size __attribute__((__unused__)), |
| const char* __fmt, |
| _Tv __v, const __c_locale&, int __prec) |
| { |
| char* __old = std::setlocale(LC_NUMERIC, NULL); |
| char* __sav = NULL; |
| if (std::strcmp(__old, "C")) |
| { |
| __sav = new char[std::strlen(__old) + 1]; |
| std::strcpy(__sav, __old); |
| std::setlocale(LC_NUMERIC, "C"); |
| } |
| |
| #ifdef _GLIBCXX_USE_C99 |
| const int __ret = std::snprintf(__out, __size, __fmt, __prec, __v); |
| #else |
| const int __ret = std::sprintf(__out, __fmt, __prec, __v); |
| #endif |
| |
| if (__sav) |
| { |
| std::setlocale(LC_NUMERIC, __sav); |
| delete [] __sav; |
| } |
| return __ret; |
| } |
| } |
| |
| #endif |