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// std::collate implementation details, GNU version -*- C++ -*-

// Copyright (C) 2001, 2002 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 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.

// As a special exception, you may use this file as part of a free software

// library without restriction.  Specifically, if other files instantiate

// templates or use macros or inline functions from this file, or you compile

// this file and link it with other files to produce an executable, this

// file does not by itself cause the resulting executable to be covered by

// the GNU General Public License.  This exception does not however

// invalidate any other reasons why the executable file might be covered by

// the GNU General Public License.

//

// ISO C++ 14882: 22.2.4.1.2  collate virtual functions

//

// Written by Benjamin Kosnik <bkoz@redhat.com>

#include <locale>

#include <bits/c++locale_internal.h>

namespace std

{

  // These are basically extensions to char_traits, and perhaps should

  // be put there instead of here.

  template<>

    int

    collate<char>::_M_compare(const char* __one, const char* __two) const

    {

      int __cmp = __strcoll_l(__one, __two, _M_c_locale_collate);

      return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0);

    }

  template<>

    size_t

    collate<char>::_M_transform(char* __to, const char* __from,

                                size_t __n) const

    { return __strxfrm_l(__to, __from, __n, _M_c_locale_collate); }

#ifdef _GLIBCXX_USE_WCHAR_T

  template<>

    int

    collate<wchar_t>::_M_compare(const wchar_t* __one,

                                 const wchar_t* __two) const

    {

      int __cmp = __wcscoll_l(__one, __two, _M_c_locale_collate);

      return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0);

    }

  template<>

    size_t

    collate<wchar_t>::_M_transform(wchar_t* __to, const wchar_t* __from,

                                   size_t __n) const

    { return __wcsxfrm_l(__to, __from, __n, _M_c_locale_collate); }

#endif

}