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+// -*- C++ -*-
+// Testing streambuf/filebuf/stringbuf for the C++ library testsuite.
+//
+// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009
+// 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() != NULL;
+ bool two = this->pptr() < this->epptr();
+ return one && two;
+ }
+
+ bool
+ read_position()
+ {
+ bool one = this->gptr() != NULL;
+ bool two = this->gptr() < this->egptr();
+ return one && two;
+ }
+
+ bool
+ unbuffered()
+ {
+ bool one = this->pbase() == NULL;
+ bool two = this->pptr() == NULL;
+ return one && two;
+ }
+
+ bool
+ check_pointers()
+ {
+ bool one = this->eback() == NULL;
+ bool two = this->gptr() == NULL;
+ bool three = this->egptr() == NULL;
+
+ bool four = this->pbase() == NULL;
+ bool five = this->pptr() == NULL;
+ bool six = this->epptr() == NULL;
+ 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();
+ 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(NULL); }
+
+ virtual iter_type
+ do_put(iter_type, ios_base&, char_type, long) const
+ { throw facet_error(); return iter_type(NULL); }
+
+ virtual iter_type
+ do_put(iter_type, ios_base&, char_type, unsigned long) const
+ { throw facet_error(); return iter_type(NULL); }
+
+#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(NULL); }
+
+ virtual iter_type
+ do_put(iter_type, ios_base&, char_type, unsigned long long) const
+ { throw facet_error(); return iter_type(NULL); }
+#endif
+
+ virtual iter_type
+ do_put(iter_type, ios_base&, char_type, double) const
+ { throw facet_error(); return iter_type(NULL); }
+
+ virtual iter_type
+ do_put(iter_type, ios_base&, char_type, long double) const
+ { throw facet_error(); return iter_type(NULL); }
+
+ virtual iter_type
+ do_put(iter_type, ios_base&, char_type, const void*) const
+ { throw facet_error(); return iter_type(NULL); }
+ };
+
+ 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
+
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