// 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// 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 test02()
{
  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;
  typedef char_traits<char>			ext_traits;

  bool test __attribute__((unused)) = true;
  const int_type* 	i_lit =
    L"\x1\x2\x3\x4\x5\x6\x7\x8\x9\xa\xb\xc\xd\xe\xf\x10\x11\x12\x13"
    L"\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20!\"#$%&"
    L"'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`"
    L"abcdefghijklmnopqrstuvwxyz{|}~\x7f\x80\x81\x82\x83\x84\x85\x86"
    L"\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95"
    L"\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4"
    L"\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3"
    L"\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2"
    L"\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1"
    L"\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0"
    L"\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef"
    L"\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe"
    L"\xff";

  const int_type*       ifrom_next;
  int 			size = wcslen(i_lit);
  ext_type* 		e_arr = new ext_type[size + 1];
  ext_type* 		e_ref = new ext_type[size + 1];
  memset(e_arr, 0xf0, size + 1);
  memset(e_ref, 0xf0, size + 1);
  ext_type*		eto_next;

  locale loc = __gnu_test::try_named_locale("en_US.ISO-8859-1");
  locale::global(loc);
  const w_codecvt* 	cvt = &use_facet<w_codecvt>(loc); 

  // unshift
  w_codecvt::state_type state01;
  zero_state(state01);
  result r1 = cvt->unshift(state01, e_arr, e_arr + size, eto_next);
  VERIFY( r1 == codecvt_base::noconv );
  VERIFY( !ext_traits::compare(e_arr, e_ref, size + 1) ); 
  VERIFY( eto_next == e_arr );

  for (int i = 0; i < size; ++i)
    {
      w_codecvt::state_type state02;
      zero_state(state02);
      cvt->out(state02, i_lit + i, i_lit + i + 1, ifrom_next, 
	       e_arr, e_arr + size, eto_next);
      memset(e_arr, 0xf0, size + 1);
      result r2 = cvt->unshift(state02, e_arr, e_arr + size, eto_next);
      VERIFY( r2 == codecvt_base::noconv );
      VERIFY( !ext_traits::compare(e_arr, e_ref, size + 1) ); 
      VERIFY( eto_next == e_arr );
    }

  delete [] e_arr;
  delete [] e_ref;
}

int main ()
{
  test02();
  return 0;
}
