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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/12790-2.cc
1 // Copyright (C) 2003 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 2, 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 COPYING. If not, write to the Free
16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19 // 27.8.1.4 Overridden virtual functions
21 // { dg-require-fileio "" }
25 #include <testsuite_hooks.h>
27 class Cvt
: public std::codecvt
<char, char, std::mbstate_t>
30 mutable bool unshift_called
;
33 : unshift_called(false)
38 do_always_noconv() const throw()
42 do_encoding() const throw()
45 std::codecvt_base::result
46 do_unshift(std::mbstate_t&, char* to
, char*, char*& to_next
) const
48 unshift_called
= true;
50 return std::codecvt_base::ok
;
55 // basic_filebuf::seekoff() should call codecvt::unshift()
60 bool test
__attribute__((unused
)) = true;
61 const char* name
= "tmp_seekoff_12790";
64 locale
loc(locale::classic(), cvt
);
70 fb
.open(name
, ios_base::out
);
73 VERIFY( !cvt
->unshift_called
);
74 fb
.pubseekoff(0, ios_base::cur
);
75 VERIFY( cvt
->unshift_called
);