1 // std::collate implementation details, generic version -*- C++ -*- 2 3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010 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 namespace std _GLIBCXX_VISIBILITY(default) 36 { 37 _GLIBCXX_BEGIN_NAMESPACE_VERSION 38 39 // These are basically extensions to char_traits, and perhaps should 40 // be put there instead of here. 41 template<> 42 int 43 collate<char>::_M_compare(const char* __one, 44 const char* __two) const throw() 45 { 46 int __cmp = strcoll(__one, __two); 47 return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0); 48 } 49 50 template<> 51 size_t 52 collate<char>::_M_transform(char* __to, const char* __from, 53 size_t __n) const throw() 54 { return strxfrm(__to, __from, __n); } 55 56 #ifdef _GLIBCXX_USE_WCHAR_T 57 template<> 58 int 59 collate<wchar_t>::_M_compare(const wchar_t* __one, 60 const wchar_t* __two) const throw() 61 { 62 int __cmp = wcscoll(__one, __two); 63 return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0); 64 } 65 66 template<> 67 size_t 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); } 71 #endif 72 73 _GLIBCXX_END_NAMESPACE_VERSION 74 } // namespace 75