80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
// -*- C++ -*-
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// Testing filebuf for the C++ library testsuite.
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//
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// Copyright (C) 2003 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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//
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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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//
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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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//
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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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#ifndef _GLIBCXX_TESTSUITE_IO_H
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#define _GLIBCXX_TESTSUITE_IO_H
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#include <fstream>
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namespace __gnu_test
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{
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// Used to verify the constraints/requirements on get and put areas
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// as defined in
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// 27.5.1 - Stream buffer requirements: get and put areas
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// 27.8.1.1 - Template class basic_filebuf p 3
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// If the file is not open (ios_base::in) -> input seq. cannot be read
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// If the file is not open (ios_base::out) -> output seq. cannot be written
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// Joint file position
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// 27.8.1.4 - Overridden virtual functions p9
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// If unbuffered, pbase == pptr == NULL
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class constraint_filebuf: public std::filebuf
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{
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public:
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bool
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write_position()
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{
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bool two = this->pptr() != NULL;
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bool one = this->pptr() < this->epptr();
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return one && two;
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}
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bool
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read_position()
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{
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bool one = this->gptr() != NULL;
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bool two = this->gptr() < this->egptr();
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return one && two;
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}
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bool
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unbuffered()
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{
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bool one = this->pbase() == NULL;
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bool two = this->pptr() == NULL;
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return one && two;
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}
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};
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}; // namespace __gnu_test
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#endif // _GLIBCXX_TESTSUITE_IO_H
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