114 lines
3.4 KiB
C++
114 lines
3.4 KiB
C++
// File descriptor layer for filebuf -*- C++ -*-
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// Copyright (C) 2002 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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#include <fstream>
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namespace __gnu_cxx
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{
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template<typename _CharT, typename _Traits = std::char_traits<_CharT> >
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class stdio_filebuf : public std::basic_filebuf<_CharT, _Traits>
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{
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public:
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// Types:
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typedef _CharT char_type;
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typedef _Traits traits_type;
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typedef typename traits_type::int_type int_type;
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typedef typename traits_type::pos_type pos_type;
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typedef typename traits_type::off_type off_type;
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protected:
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// Stack-based buffer for unbuffered input.
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char_type _M_unbuf[4];
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public:
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stdio_filebuf(int __fd, std::ios_base::openmode __mode, bool __del,
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int_type __size);
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stdio_filebuf(std::__c_file* __f, std::ios_base::openmode __mode,
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int_type __size = static_cast<int_type>(BUFSIZ));
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virtual
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~stdio_filebuf();
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int
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fd()
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{ return _M_file.fd(); }
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};
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template<typename _CharT, typename _Traits>
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stdio_filebuf<_CharT, _Traits>::~stdio_filebuf()
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{ }
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template<typename _CharT, typename _Traits>
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stdio_filebuf<_CharT, _Traits>::
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stdio_filebuf(int __fd, std::ios_base::openmode __mode, bool __del,
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int_type __size)
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{
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_M_file.sys_open(__fd, __mode, __del);
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if (this->is_open())
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{
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_M_mode = __mode;
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_M_buf_size_opt = __size;
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if (__size > 0 && __size < 4)
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{
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_M_buf = _M_unbuf;
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_M_buf_size = __size;
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}
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else
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_M_allocate_internal_buffer();
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_M_set_indeterminate();
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}
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}
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template<typename _CharT, typename _Traits>
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stdio_filebuf<_CharT, _Traits>::
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stdio_filebuf(std::__c_file* __f, std::ios_base::openmode __mode,
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int_type __size)
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{
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_M_file.sys_open(__f, __mode);
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if (this->is_open())
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{
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_M_mode = __mode;
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_M_buf_size_opt = __size;
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if (__size > 0 && __size < 4)
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{
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_M_buf = _M_unbuf;
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_M_buf_size = __size;
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}
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else
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_M_allocate_internal_buffer();
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_M_set_indeterminate();
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}
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}
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} // namespace __gnu_cxx
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