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 _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, 42 const char* __two) const throw() 43 { 44 int __cmp = strcoll(__one, __two); 45 return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0); 46 } 47 48 template<> 49 size_t 50 collate<char>::_M_transform(char* __to, const char* __from, 51 size_t __n) const throw() 52 { return strxfrm(__to, __from, __n); } 53 54 #ifdef _GLIBCXX_USE_WCHAR_T 55 template<> 56 int 57 collate<wchar_t>::_M_compare(const wchar_t* __one, 58 const wchar_t* __two) const throw() 59 { 60 int __cmp = wcscoll(__one, __two); 61 return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0); 62 } 63 64 template<> 65 size_t 66 collate<wchar_t>::_M_transform(wchar_t* __to, const wchar_t* __from, 67 size_t __n) const throw() 68 { return wcsxfrm(__to, __from, __n); } 69 #endif 70 71 _GLIBCXX_END_NAMESPACE 72