1 // std::collate implementation details, generic version -*- C++ -*-
3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010
4 // Free Software Foundation, Inc.
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)
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.
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.
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/>.
27 // ISO C++ 14882: 22.2.4.1.2 collate virtual functions
30 // Written by Benjamin Kosnik <bkoz@redhat.com>
35 namespace std _GLIBCXX_VISIBILITY(default)
37 _GLIBCXX_BEGIN_NAMESPACE_VERSION
39 // These are basically extensions to char_traits, and perhaps should
40 // be put there instead of here.
43 collate<char>::_M_compare(const char* __one,
44 const char* __two) const throw()
46 int __cmp = strcoll(__one, __two);
47 return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0);
52 collate<char>::_M_transform(char* __to, const char* __from,
53 size_t __n) const throw()
54 { return strxfrm(__to, __from, __n); }
56 #ifdef _GLIBCXX_USE_WCHAR_T
59 collate<wchar_t>::_M_compare(const wchar_t* __one,
60 const wchar_t* __two) const throw()
62 int __cmp = wcscoll(__one, __two);
63 return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0);
68 collate<wchar_t>::_M_transform(wchar_t* __to, const wchar_t* __from,
69 size_t __n) const throw()
70 { return wcsxfrm(__to, __from, __n); }
73 _GLIBCXX_END_NAMESPACE_VERSION