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

// Copyright (C) 2001, 2002, 2005, 2009, 2010 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 3, 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.

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// <http://www.gnu.org/licenses/>.

//

// 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>

_GLIBCXX_BEGIN_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 throw()

    {

      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 throw()

    { 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 throw()

    {

      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 throw()

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

#endif

_GLIBCXX_END_NAMESPACE