contrib/gcc-4.4/libstdc++-v3/config/locale/generic/collate_members.cc

   1 // std::collate implementation details, generic version -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009
   4 // Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // Under Section 7 of GPL version 3, you are granted additional
  18 // permissions described in the GCC Runtime Library Exception, version
  19 // 3.1, as published by the Free Software Foundation.
  20
  21 // You should have received a copy of the GNU General Public License and
  22 // a copy of the GCC Runtime Library Exception along with this program;
  23 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 // <http://www.gnu.org/licenses/>.
  25
  26 //
  27 // ISO C++ 14882: 22.2.4.1.2  collate virtual functions
  28 //
  29
  30 // Written by Benjamin Kosnik <bkoz@redhat.com>
  31
  32 #include <locale>
  33 #include <cstring>
  34
  35 _GLIBCXX_BEGIN_NAMESPACE(std)
  36
  37   // These are basically extensions to char_traits, and perhaps should
  38   // be put there instead of here.
  39   template<>
  40     int
  41     collate<char>::_M_compare(const char* __one, const char* __two) const
  42     {
  43       int __cmp = strcoll(__one, __two);
  44       return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0);
  45     }
  46
  47   template<>
  48     size_t
  49     collate<char>::_M_transform(char* __to, const char* __from,
  50                                 size_t __n) const
  51     { return strxfrm(__to, __from, __n); }
  52
  53 #ifdef _GLIBCXX_USE_WCHAR_T
  54   template<>
  55     int
  56     collate<wchar_t>::_M_compare(const wchar_t* __one,
  57                                  const wchar_t* __two) const
  58     {
  59       int __cmp = wcscoll(__one, __two);
  60       return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0);
  61     }
  62
  63   template<>
  64     size_t
  65     collate<wchar_t>::_M_transform(wchar_t* __to, const wchar_t* __from,
  66                                    size_t __n) const
  67     { return wcsxfrm(__to, __from, __n); }
  68 #endif
  69
  70 _GLIBCXX_END_NAMESPACE