1 // filebuf with encoding state type -*- C++ -*- 2 3 // Copyright (C) 2002-2018 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 /** @file ext/enc_filebuf.h 26 * This file is a GNU extension to the Standard C++ Library. 27 */ 28 29 #ifndef _EXT_ENC_FILEBUF_H 30 #define _EXT_ENC_FILEBUF_H 1 31 32 #include <fstream> 33 #include <locale> 34 #include <ext/codecvt_specializations.h> 35 36 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 37 { 38 _GLIBCXX_BEGIN_NAMESPACE_VERSION 39 40 /// class enc_filebuf. 41 template<typename _CharT> 42 class enc_filebuf 43 : public std::basic_filebuf<_CharT, encoding_char_traits<_CharT> > 44 { 45 public: 46 typedef encoding_char_traits<_CharT> traits_type; 47 typedef typename traits_type::state_type state_type; 48 typedef typename traits_type::pos_type pos_type; 49 50 enc_filebuf(state_type& __state) 51 : std::basic_filebuf<_CharT, encoding_char_traits<_CharT> >() 52 { this->_M_state_beg = __state; } 53 54 private: 55 // concept requirements: 56 // Set state type to something useful. 57 // Something more than copyconstructible is needed here, so 58 // require default and copy constructible + assignment operator. 59 __glibcxx_class_requires(state_type, _SGIAssignableConcept) 60 }; 61 62 _GLIBCXX_END_NAMESPACE_VERSION 63 } // namespace 64 65 #endif 66