1 // Copyright (C) 2003, 2009 Free Software Foundation, Inc.
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
18 // 27.8.1.4 Overridden virtual functions
22 #include <testsuite_hooks.h>
24 class Cvt : public std::codecvt<wchar_t, char, std::mbstate_t>
27 mutable bool unshift_called;
30 : unshift_called(false)
35 do_always_noconv() const throw()
39 do_encoding() const throw()
42 std::codecvt_base::result
43 do_unshift(std::mbstate_t&, char* to, char*, char*& to_next) const
45 unshift_called = true;
47 return std::codecvt_base::ok;
52 // basic_filebuf::seekoff() should call codecvt::unshift(),
53 // but only if writing
58 bool test __attribute__((unused)) = true;
59 const char* name = "tmp_seekoff_12790";
62 locale loc(locale::classic(), cvt);
67 fb.open(name, ios_base::out);
69 VERIFY( !cvt->unshift_called );
70 fb.pubseekoff(0, ios_base::cur);
71 VERIFY( !cvt->unshift_called );