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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>

#ifdef _GLIBCXX_USE___ENC_TRAITS

// Need some char_traits specializations for this to work.

typedef unsigned short                  unicode_t;

namespace std

{

  template<>

    struct char_traits<unicode_t>

    {

      typedef unicode_t         char_type;

      // Unsigned as wint_t is unsigned.

      typedef unsigned long     int_type;

      typedef streampos         pos_type;

      typedef streamoff         off_type;

      typedef mbstate_t         state_type;

      static void

      assign(char_type& __c1, const char_type& __c2);

      static bool

      eq(const char_type& __c1, const char_type& __c2);

      static bool

      lt(const char_type& __c1, const char_type& __c2);

      static int

      compare(const char_type* __s1, const char_type* __s2, size_t __n)

      { return memcmp(__s1, __s2, __n); }

      static size_t

      length(const char_type* __s);

      static const char_type*

      find(const char_type* __s, size_t __n, const char_type& __a);

      static char_type*

      move(char_type* __s1, const char_type* __s2, size_t __n);

      static char_type*

      copy(char_type* __s1, const char_type* __s2, size_t __n)

      {  return static_cast<char_type*>(memcpy(__s1, __s2, __n)); }

      static char_type*

      assign(char_type* __s, size_t __n, char_type __a);

      static char_type

      to_char_type(const int_type& __c);

      static int_type

      to_int_type(const char_type& __c);

      static bool

      eq_int_type(const int_type& __c1, const int_type& __c2);

      static int_type

      eof();

      static int_type

      not_eof(const int_type& __c);

    };

}

void

initialize_state(std::__enc_traits& state)

{ state._M_init(); }

bool length_called = false;

class length_codecvt : public std::codecvt<unicode_t, char, std::__enc_traits>

{

  typedef std::codecvt<unicode_t, char, std::__enc_traits> unicode_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 unicode_codecvt::do_length(state, from, end, max);

  }

};

// Partial specialization using __enc_traits.

// codecvt<unicode_t, char, __enc_traits>

// UNICODE - UCS2 (big endian)

void test01()

{

  using namespace std;

  typedef unicode_t                             int_type;

  typedef char                                  ext_type;

  typedef __enc_traits                          enc_type;

  typedef codecvt<int_type, ext_type, enc_type> unicode_codecvt;

  bool test __attribute__((unused)) = true;

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

  int                   size = strlen(e_lit);

  // construct a locale object with the specialized facet.

  locale                loc(locale::classic(), new length_codecvt);

  // sanity check the constructed locale has the specialized facet.

  VERIFY( has_facet<unicode_codecvt>(loc) );

  const unicode_codecvt&        cvt = use_facet<unicode_codecvt>(loc);

  unicode_codecvt::state_type state04("UCS-2BE", "ISO-8859-15", 0xfeff, 0);

  initialize_state(state04);

  length_called = false;

  cvt.length(state04, e_lit, e_lit + size, 5);

  VERIFY( length_called );

}

#endif // _GLIBCXX_USE___ENC_TRAITS

int main ()

{

#if _GLIBCXX_USE___ENC_TRAITS

  test01();

#endif 

  return 0;

}