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// Copyright (C) 2003-2019 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/>.
// 27.8.1.4 Overridden virtual functions
// { dg-require-fileio "" }
#include <fstream>
#include <locale>
#include <testsuite_hooks.h>
struct MyState
{
};
struct MyCharTraits : std::char_traits<wchar_t>
{
typedef std::fpos<MyState> pos_type;
typedef MyState state_type;
};
namespace std
{
template <>
class codecvt<wchar_t, char, MyState> :
public locale::facet, public codecvt_base
{
public:
typedef wchar_t intern_type;
typedef char extern_type;
typedef MyState state_type;
explicit codecvt(size_t refs = 0)
: locale::facet(refs) { }
result out(state_type& state, const intern_type* from,
const intern_type* from_end, const intern_type*& from_next,
extern_type* to, extern_type* to_limit,
extern_type*& to_next) const
{ return do_out(state, from, from_end, from_next,
to, to_limit, to_next); }
result unshift(state_type& state, extern_type* to, extern_type* to_limit,
extern_type*& to_next) const
{ return do_unshift(state, to, to_limit, to_next); }
result in(state_type& state, const extern_type* from,
const extern_type* from_end, const extern_type*& from_next,
intern_type* to, intern_type* to_limit,
intern_type*& to_next) const
{ return do_in(state, from, from_end, from_next,
to, to_limit, to_next); }
int encoding() const throw()
{ return do_encoding(); }
bool always_noconv() const throw()
{ return do_always_noconv(); }
int length(state_type& state, const extern_type* from,
const extern_type* end, size_t max) const
{ return do_length(state, from, end, max); }
int max_length() const throw()
{ return do_max_length(); }
static locale::id id;
protected:
virtual ~codecvt();
virtual result do_out(state_type&, const intern_type*,
const intern_type*, const intern_type*&,
extern_type*, extern_type*, extern_type*&) const
{ return error; }
virtual result do_in(state_type&, const extern_type*, const extern_type*,
const extern_type*&, intern_type*, intern_type*,
intern_type*&) const
{ return error; }
virtual result do_unshift(state_type&, extern_type*, extern_type*,
extern_type*&) const
{ return noconv; }
virtual int do_encoding() const throw()
{ return 1; }
virtual bool do_always_noconv() const throw()
{ return false; }
virtual int do_length(state_type&, const extern_type* from,
const extern_type* end, size_t max) const
{
size_t len = end - from;
return std::min(max, len);
}
virtual int do_max_length() const throw()
{ return 1; }
};
locale::id codecvt<wchar_t, char, MyState>::id;
codecvt<wchar_t, char, MyState>::~codecvt()
{ }
}
void test01()
{
std::locale loc(std::locale::classic(),
new std::codecvt<wchar_t, char, MyState>);
std::basic_filebuf<wchar_t, MyCharTraits> fb;
fb.pubimbue(loc);
fb.open("tmp_11543", std::ios_base::out);
VERIFY( fb.is_open() );
MyCharTraits::pos_type pos = fb.pubseekoff(0, std::ios_base::beg);
VERIFY( pos != MyCharTraits::pos_type(MyCharTraits::off_type(-1)) );
fb.close();
}
int main()
{
test01();
return 0;
}
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