mirror of
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319 lines
8.7 KiB
C++
319 lines
8.7 KiB
C++
// -*- C++ -*-
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// Testing streambuf/filebuf/stringbuf for the C++ library testsuite.
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//
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// Copyright (C) 2003-2018 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 3, 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 COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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//
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#ifndef _GLIBCXX_TESTSUITE_IO_H
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#define _GLIBCXX_TESTSUITE_IO_H
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#include <ios>
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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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// 27.7.1.1 - Basic_stringbuf constructors p 1
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// 27.8.1.2 - Basic_filebuf constructors p 1
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// ... , initializing the base class with basic_streambuf() 27.5.2.1
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template<typename T>
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class constraint_buf
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: public T
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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 one = this->pptr() != 0;
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bool two = 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() != 0;
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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() == 0;
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bool two = this->pptr() == 0;
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return one && two;
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}
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bool
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check_pointers()
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{
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bool one = this->eback() == 0;
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bool two = this->gptr() == 0;
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bool three = this->egptr() == 0;
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bool four = this->pbase() == 0;
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bool five = this->pptr() == 0;
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bool six = this->epptr() == 0;
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return one && two && three && four && five && six;
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}
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};
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typedef constraint_buf<std::streambuf> constraint_streambuf;
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typedef constraint_buf<std::filebuf> constraint_filebuf;
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typedef constraint_buf<std::stringbuf> constraint_stringbuf;
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#ifdef _GLIBCXX_USE_WCHAR_T
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typedef constraint_buf<std::wstreambuf> constraint_wstreambuf;
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typedef constraint_buf<std::wfilebuf> constraint_wfilebuf;
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typedef constraint_buf<std::wstringbuf> constraint_wstringbuf;
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#endif
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// Used to check if basic_streambuf::pubsync() has been called.
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// This is useful for checking if a function creates [io]stream::sentry
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// objects, since the sentry constructors call tie()->flush().
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template<typename T>
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class sync_buf
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: public T
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{
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private:
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bool m_sync_called;
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public:
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sync_buf()
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: m_sync_called(false)
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{ }
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bool sync_called() const
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{ return m_sync_called; }
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protected:
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int sync()
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{
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m_sync_called = true;
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return 0;
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}
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};
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typedef sync_buf<std::streambuf> sync_streambuf;
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#ifdef _GLIBCXX_USE_WCHAR_T
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typedef sync_buf<std::wstreambuf> sync_wstreambuf;
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#endif
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// Throws on all overflow and underflow calls.
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struct underflow_error: std::exception { };
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struct overflow_error: std::exception { };
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struct positioning_error: std::exception { };
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template<typename T>
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struct fail_buf
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: public T
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{
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typedef typename T::char_type char_type;
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typedef typename T::int_type int_type;
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typedef typename T::off_type off_type;
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typedef typename T::pos_type pos_type;
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private:
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char_type p[2];
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public:
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fail_buf()
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{
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p[0] = char_type('s');
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p[1] = char_type();
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this->setg(p, p, p + 1);
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}
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virtual int_type underflow()
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{
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throw underflow_error();
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return int_type();
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}
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virtual int_type uflow()
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{
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throw underflow_error();
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return int_type();
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}
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virtual int_type
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overflow(int_type)
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{
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throw overflow_error();
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return int_type();
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}
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virtual pos_type
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seekoff(off_type, std::ios_base::seekdir, std::ios_base::openmode)
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{
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throw positioning_error();
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return pos_type(off_type(-1));
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}
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virtual pos_type
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seekpos(pos_type, std::ios_base::openmode)
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{
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throw positioning_error();
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return pos_type(off_type(-1));
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}
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virtual int
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sync()
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{
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throw positioning_error();
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return 0;
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}
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};
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typedef fail_buf<std::streambuf> fail_streambuf;
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#ifdef _GLIBCXX_USE_WCHAR_T
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typedef fail_buf<std::wstreambuf> fail_wstreambuf;
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#endif
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// Facets that throw an exception for every virtual function.
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struct facet_error: std::exception { };
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template<typename T>
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class fail_num_get
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: public std::num_get<T>
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{
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typedef std::ios_base ios_base;
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typedef typename std::num_get<T>::iter_type iter_type;
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protected:
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iter_type
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do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, bool&) const
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{ throw facet_error(); return iter_type(); }
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virtual iter_type
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do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, long&) const
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{ throw facet_error(); return iter_type(); }
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virtual iter_type
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do_get(iter_type, iter_type, ios_base&, ios_base::iostate&,
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unsigned short&) const
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{ throw facet_error(); return iter_type(); }
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virtual iter_type
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do_get(iter_type, iter_type, ios_base&, ios_base::iostate&,
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unsigned int&) const
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{ throw facet_error(); return iter_type(); }
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virtual iter_type
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do_get(iter_type, iter_type, ios_base&, ios_base::iostate&,
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unsigned long&) const
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{ throw facet_error(); return iter_type(); }
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#ifdef _GLIBCXX_USE_LONG_LONG
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virtual iter_type
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do_get(iter_type, iter_type, ios_base&, ios_base::iostate&,
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long long&) const
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{ throw facet_error(); return iter_type(); }
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virtual iter_type
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do_get(iter_type, iter_type, ios_base&, ios_base::iostate&,
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unsigned long long&) const
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{ throw facet_error(); return iter_type(); }
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#endif
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virtual iter_type
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do_get(iter_type, iter_type, ios_base&, ios_base::iostate&,
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float&) const
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{ throw facet_error(); return iter_type(); }
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virtual iter_type
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do_get(iter_type, iter_type, ios_base&, ios_base::iostate&,
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double&) const
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{ throw facet_error(); return iter_type(); }
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virtual iter_type
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do_get(iter_type, iter_type, ios_base&, ios_base::iostate&,
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long double&) const
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{ throw facet_error(); return iter_type(); }
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virtual iter_type
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do_get(iter_type, iter_type, ios_base&, ios_base::iostate&,
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void*&) const
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{ throw facet_error(); return iter_type(); }
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};
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typedef fail_num_get<char> fail_num_get_char;
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#ifdef _GLIBCXX_USE_WCHAR_T
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typedef fail_num_get<wchar_t> fail_num_get_wchar_t;
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#endif
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template<typename T>
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class fail_num_put
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: public std::num_put<T>
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{
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typedef std::ios_base ios_base;
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typedef typename std::num_put<T>::iter_type iter_type;
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typedef typename std::num_put<T>::char_type char_type;
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protected:
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iter_type
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do_put(iter_type, ios_base&, char_type, bool) const
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{ throw facet_error(); return iter_type(0); }
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virtual iter_type
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do_put(iter_type, ios_base&, char_type, long) const
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{ throw facet_error(); return iter_type(0); }
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virtual iter_type
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do_put(iter_type, ios_base&, char_type, unsigned long) const
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{ throw facet_error(); return iter_type(0); }
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#ifdef _GLIBCXX_USE_LONG_LONG
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virtual iter_type
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do_put(iter_type, ios_base&, char_type, long long) const
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{ throw facet_error(); return iter_type(0); }
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virtual iter_type
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do_put(iter_type, ios_base&, char_type, unsigned long long) const
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{ throw facet_error(); return iter_type(0); }
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#endif
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virtual iter_type
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do_put(iter_type, ios_base&, char_type, double) const
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{ throw facet_error(); return iter_type(0); }
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virtual iter_type
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do_put(iter_type, ios_base&, char_type, long double) const
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{ throw facet_error(); return iter_type(0); }
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virtual iter_type
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do_put(iter_type, ios_base&, char_type, const void*) const
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{ throw facet_error(); return iter_type(0); }
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};
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typedef fail_num_put<char> fail_num_put_char;
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#ifdef _GLIBCXX_USE_WCHAR_T
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typedef fail_num_put<wchar_t> fail_num_put_wchar_t;
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#endif
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} // namespace __gnu_test
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#endif // _GLIBCXX_TESTSUITE_IO_H
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