1// std::collate implementation details, GNU version -*- C++ -*- 2 3// Copyright (C) 2001, 2002, 2005 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 2, 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// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19// USA. 20 21// As a special exception, you may use this file as part of a free software 22// library without restriction. Specifically, if other files instantiate 23// templates or use macros or inline functions from this file, or you compile 24// this file and link it with other files to produce an executable, this 25// file does not by itself cause the resulting executable to be covered by 26// the GNU General Public License. This exception does not however 27// invalidate any other reasons why the executable file might be covered by 28// the GNU General Public License. 29 30// 31// ISO C++ 14882: 22.2.4.1.2 collate virtual functions 32// 33 34// Written by Benjamin Kosnik <bkoz@redhat.com> 35 36#include <locale> 37#include <bits/c++locale_internal.h> 38 39_GLIBCXX_BEGIN_NAMESPACE(std) 40 41 // These are basically extensions to char_traits, and perhaps should 42 // be put there instead of here. 43 template<> 44 int 45 collate<char>::_M_compare(const char* __one, const char* __two) const 46 { 47 int __cmp = __strcoll_l(__one, __two, _M_c_locale_collate); 48 return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0); 49 } 50 51 template<> 52 size_t 53 collate<char>::_M_transform(char* __to, const char* __from, 54 size_t __n) const 55 { return __strxfrm_l(__to, __from, __n, _M_c_locale_collate); } 56 57#ifdef _GLIBCXX_USE_WCHAR_T 58 template<> 59 int 60 collate<wchar_t>::_M_compare(const wchar_t* __one, 61 const wchar_t* __two) const 62 { 63 int __cmp = __wcscoll_l(__one, __two, _M_c_locale_collate); 64 return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0); 65 } 66 67 template<> 68 size_t 69 collate<wchar_t>::_M_transform(wchar_t* __to, const wchar_t* __from, 70 size_t __n) const 71 { return __wcsxfrm_l(__to, __from, __n, _M_c_locale_collate); } 72#endif 73 74_GLIBCXX_END_NAMESPACE 75