| // -*- C++ -*- |
| // Testing streambuf/filebuf/stringbuf for the C++ library testsuite. |
| // |
| // Copyright (C) 2003-2025 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 3, 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 COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| // |
| |
| #ifndef _GLIBCXX_TESTSUITE_IO_H |
| #define _GLIBCXX_TESTSUITE_IO_H |
| |
| #include <ios> |
| |
| namespace __gnu_test |
| { |
| // Used to verify the constraints/requirements on get and put areas |
| // as defined in |
| // 27.5.1 - Stream buffer requirements: get and put areas |
| // 27.8.1.1 - Template class basic_filebuf p 3 |
| // If the file is not open (ios_base::in) -> input seq. cannot be read |
| // If the file is not open (ios_base::out) -> output seq. cannot be written |
| // Joint file position |
| // 27.8.1.4 - Overridden virtual functions p9 |
| // If unbuffered, pbase == pptr == NULL |
| // 27.7.1.1 - Basic_stringbuf constructors p 1 |
| // 27.8.1.2 - Basic_filebuf constructors p 1 |
| // ... , initializing the base class with basic_streambuf() 27.5.2.1 |
| template<typename T> |
| class constraint_buf |
| : public T |
| { |
| public: |
| bool |
| write_position() |
| { |
| bool one = this->pptr() != 0; |
| bool two = this->pptr() < this->epptr(); |
| return one && two; |
| } |
| |
| bool |
| read_position() |
| { |
| bool one = this->gptr() != 0; |
| bool two = this->gptr() < this->egptr(); |
| return one && two; |
| } |
| |
| bool |
| unbuffered() |
| { |
| bool one = this->pbase() == 0; |
| bool two = this->pptr() == 0; |
| return one && two; |
| } |
| |
| bool |
| check_pointers() |
| { |
| bool one = this->eback() == 0; |
| bool two = this->gptr() == 0; |
| bool three = this->egptr() == 0; |
| |
| bool four = this->pbase() == 0; |
| bool five = this->pptr() == 0; |
| bool six = this->epptr() == 0; |
| return one && two && three && four && five && six; |
| } |
| }; |
| |
| typedef constraint_buf<std::streambuf> constraint_streambuf; |
| typedef constraint_buf<std::filebuf> constraint_filebuf; |
| typedef constraint_buf<std::stringbuf> constraint_stringbuf; |
| #ifdef _GLIBCXX_USE_WCHAR_T |
| typedef constraint_buf<std::wstreambuf> constraint_wstreambuf; |
| typedef constraint_buf<std::wfilebuf> constraint_wfilebuf; |
| typedef constraint_buf<std::wstringbuf> constraint_wstringbuf; |
| #endif |
| |
| // Used to check if basic_streambuf::pubsync() has been called. |
| // This is useful for checking if a function creates [io]stream::sentry |
| // objects, since the sentry constructors call tie()->flush(). |
| template<typename T> |
| class sync_buf |
| : public T |
| { |
| private: |
| bool m_sync_called; |
| |
| public: |
| sync_buf() |
| : m_sync_called(false) |
| { } |
| |
| bool sync_called() const |
| { return m_sync_called; } |
| |
| protected: |
| int sync() |
| { |
| m_sync_called = true; |
| return 0; |
| } |
| }; |
| |
| typedef sync_buf<std::streambuf> sync_streambuf; |
| #ifdef _GLIBCXX_USE_WCHAR_T |
| typedef sync_buf<std::wstreambuf> sync_wstreambuf; |
| #endif |
| |
| // Throws on all overflow and underflow calls. |
| struct underflow_error: std::exception { }; |
| struct overflow_error: std::exception { }; |
| struct positioning_error: std::exception { }; |
| |
| template<typename T> |
| struct fail_buf |
| : public T |
| { |
| typedef typename T::char_type char_type; |
| typedef typename T::int_type int_type; |
| typedef typename T::off_type off_type; |
| typedef typename T::pos_type pos_type; |
| |
| private: |
| char_type p[2]; |
| |
| public: |
| fail_buf() |
| { |
| p[0] = char_type('s'); |
| p[1] = char_type(); |
| this->setg(p, p, p + 1); |
| } |
| |
| virtual int_type underflow() |
| { |
| throw underflow_error(); |
| return int_type(); |
| } |
| |
| virtual int_type uflow() |
| { |
| throw underflow_error(); |
| return int_type(); |
| } |
| |
| virtual int_type |
| overflow(int_type) |
| { |
| throw overflow_error(); |
| return int_type(); |
| } |
| |
| virtual pos_type |
| seekoff(off_type, std::ios_base::seekdir, std::ios_base::openmode) |
| { |
| throw positioning_error(); |
| return pos_type(off_type(-1)); |
| } |
| |
| virtual pos_type |
| seekpos(pos_type, std::ios_base::openmode) |
| { |
| throw positioning_error(); |
| return pos_type(off_type(-1)); |
| } |
| |
| virtual int |
| sync() |
| { |
| throw positioning_error(); |
| return 0; |
| } |
| }; |
| |
| typedef fail_buf<std::streambuf> fail_streambuf; |
| #ifdef _GLIBCXX_USE_WCHAR_T |
| typedef fail_buf<std::wstreambuf> fail_wstreambuf; |
| #endif |
| |
| // Facets that throw an exception for every virtual function. |
| struct facet_error: std::exception { }; |
| |
| template<typename T> |
| class fail_num_get |
| : public std::num_get<T> |
| { |
| typedef std::ios_base ios_base; |
| typedef typename std::num_get<T>::iter_type iter_type; |
| |
| protected: |
| iter_type |
| do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, bool&) const |
| { throw facet_error(); return iter_type(); } |
| |
| virtual iter_type |
| do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, long&) const |
| { throw facet_error(); return iter_type(); } |
| |
| virtual iter_type |
| do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, |
| unsigned short&) const |
| { throw facet_error(); return iter_type(); } |
| |
| virtual iter_type |
| do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, |
| unsigned int&) const |
| { throw facet_error(); return iter_type(); } |
| |
| virtual iter_type |
| do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, |
| unsigned long&) const |
| { throw facet_error(); return iter_type(); } |
| |
| #ifdef _GLIBCXX_USE_LONG_LONG |
| virtual iter_type |
| do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, |
| long long&) const |
| { throw facet_error(); return iter_type(); } |
| |
| virtual iter_type |
| do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, |
| unsigned long long&) const |
| { throw facet_error(); return iter_type(); } |
| #endif |
| |
| virtual iter_type |
| do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, |
| float&) const |
| { throw facet_error(); return iter_type(); } |
| |
| virtual iter_type |
| do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, |
| double&) const |
| { throw facet_error(); return iter_type(); } |
| |
| virtual iter_type |
| do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, |
| long double&) const |
| { throw facet_error(); return iter_type(); } |
| |
| virtual iter_type |
| do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, |
| void*&) const |
| { throw facet_error(); return iter_type(); } |
| }; |
| |
| typedef fail_num_get<char> fail_num_get_char; |
| #ifdef _GLIBCXX_USE_WCHAR_T |
| typedef fail_num_get<wchar_t> fail_num_get_wchar_t; |
| #endif |
| |
| template<typename T> |
| class fail_num_put |
| : public std::num_put<T> |
| { |
| typedef std::ios_base ios_base; |
| typedef typename std::num_put<T>::iter_type iter_type; |
| typedef typename std::num_put<T>::char_type char_type; |
| |
| protected: |
| iter_type |
| do_put(iter_type, ios_base&, char_type, bool) const |
| { throw facet_error(); return iter_type(0); } |
| |
| virtual iter_type |
| do_put(iter_type, ios_base&, char_type, long) const |
| { throw facet_error(); return iter_type(0); } |
| |
| virtual iter_type |
| do_put(iter_type, ios_base&, char_type, unsigned long) const |
| { throw facet_error(); return iter_type(0); } |
| |
| #ifdef _GLIBCXX_USE_LONG_LONG |
| virtual iter_type |
| do_put(iter_type, ios_base&, char_type, long long) const |
| { throw facet_error(); return iter_type(0); } |
| |
| virtual iter_type |
| do_put(iter_type, ios_base&, char_type, unsigned long long) const |
| { throw facet_error(); return iter_type(0); } |
| #endif |
| |
| virtual iter_type |
| do_put(iter_type, ios_base&, char_type, double) const |
| { throw facet_error(); return iter_type(0); } |
| |
| virtual iter_type |
| do_put(iter_type, ios_base&, char_type, long double) const |
| { throw facet_error(); return iter_type(0); } |
| |
| virtual iter_type |
| do_put(iter_type, ios_base&, char_type, const void*) const |
| { throw facet_error(); return iter_type(0); } |
| }; |
| |
| typedef fail_num_put<char> fail_num_put_char; |
| #ifdef _GLIBCXX_USE_WCHAR_T |
| typedef fail_num_put<wchar_t> fail_num_put_wchar_t; |
| #endif |
| } // namespace __gnu_test |
| |
| #endif // _GLIBCXX_TESTSUITE_IO_H |
| |
