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// 2000-08-17 Benjamin Kosnik <bkoz@cygnus.com>

// Copyright (C) 2000, 2002, 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)); }

// Required instantiation

// codecvt<wchar_t, char, mbstate_t>

void test01()

{

  using namespace std;

  typedef codecvt<wchar_t, char, mbstate_t>     w_codecvt;

  typedef codecvt_base::result                  result;

  typedef wchar_t                               int_type;

  typedef char                                  ext_type;

  bool test __attribute__((unused)) = true;

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

  int                   size = strlen(e_lit);

  ext_type*             e_arr = new ext_type[size + 1];

  ext_type*             eto_next;

  locale                loc;

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

  // unshift

  strcpy(e_arr, e_lit);

  w_codecvt::state_type state03;

  zero_state(state03);

  result r3 = cvt->unshift(state03, e_arr, e_arr + size, eto_next);

  VERIFY( r3 == codecvt_base::noconv );

  VERIFY( !strcmp(e_arr, e_lit) );

  VERIFY( eto_next == e_arr );

  delete [] e_arr;

}

int main ()

{

  test01();

  return 0;

}