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