collate_members.cc revision 1.1.1.1 
1// std::collate implementation details, GNU version -*- C++ -*-
2
3// Copyright (C) 2001, 2002, 2005, 2009, 2010 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
23// <http://www.gnu.org/licenses/>.
24
25//
26// ISO C++ 14882: 22.2.4.1.2  collate virtual functions
27//
28
29// Written by Benjamin Kosnik <bkoz@redhat.com>
30
31#include <locale>
32#include <bits/c++locale_internal.h>
33
34_GLIBCXX_BEGIN_NAMESPACE(std)
35
36  // These are basically extensions to char_traits, and perhaps should
37  // be put there instead of here.
38  template<>
39    int
40    collate<char>::_M_compare(const char* __one,
41			      const char* __two) const throw()
42    {
43      int __cmp = __strcoll_l(__one, __two, _M_c_locale_collate);
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 throw()
51    { return __strxfrm_l(__to, __from, __n, _M_c_locale_collate); }
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 throw()
58    {
59      int __cmp = __wcscoll_l(__one, __two, _M_c_locale_collate);
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 throw()
67    { return __wcsxfrm_l(__to, __from, __n, _M_c_locale_collate); }
68#endif
69
70_GLIBCXX_END_NAMESPACE
71