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// 2003-02-06  Petur Runolfsson  <peturr02@ru.is>

// Copyright (C) 2003 Free Software Foundation

//

// 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 2, 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 COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// 22.2.1.5 - Template class codecvt [lib.locale.codecvt]

#include <locale>

#include <testsuite_hooks.h>

// Need to explicitly set the state(mbstate_t) to zero.

// How to do this is not specified by the ISO C99 standard, so we

// might need to add some operators to make the intuiative case

// work:

//   w_codecvt::state_type state00;

//   state00 = 0;  

// or, can use this explicit "C" initialization:

//   w_codecvt::state_type state01 = {0, 0};

// .. except Ulrich says: Use memset. Always use memset. Feel the force...

void

zero_state(std::mbstate_t& state)

{ std::memset(&state, 0, sizeof(std::mbstate_t)); }

bool length_called = false;

class length_codecvt : public std::codecvt<wchar_t, char, std::mbstate_t>

{

  typedef std::codecvt<wchar_t, char, std::mbstate_t> w_codecvt;

public:

  // DR75: type of first argument of do_length is state_type&

  virtual int do_length(state_type& state, const extern_type* from,

                        const extern_type* end, std::size_t max) const

  {

    length_called = true;

    return w_codecvt::do_length(state, from, end, max);

  }

};

// Required instantiation

// codecvt<wchar_t, char, mbstate_t>

//

// libstdc++/9224

void test06()

{

  using namespace std;

  typedef codecvt<wchar_t, char, mbstate_t>     w_codecvt;

  typedef char                                  ext_type;

  bool test __attribute__((unused)) = true;

  const ext_type*       e_lit = "black pearl jasmine tea";

  int                   size = strlen(e_lit);

  locale                loc;

  loc = locale(loc, new length_codecvt);

  const w_codecvt*      cvt = &use_facet<w_codecvt>(loc);

  w_codecvt::state_type state04;

  zero_state(state04);

  length_called = false;

  cvt->length(state04, e_lit, e_lit + size, 5);

  VERIFY( length_called );

}

int main ()

{

  test06();

  return 0;

}