collate_members.cc revision 1.1.1.5
1// std::collate implementation details, GNU version -*- C++ -*- 2 3// Copyright (C) 2001-2017 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 3, 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// Under Section 7 of GPL version 3, you are granted additional 17// permissions described in the GCC Runtime Library Exception, version 18// 3.1, as published by the Free Software Foundation. 19 20// You should have received a copy of the GNU General Public License and 21// a copy of the GCC Runtime Library Exception along with this program; 22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23// <http://www.gnu.org/licenses/>. 24 25// 26// ISO C++ 14882: 22.2.4.1.2 collate virtual functions 27// 28 29// Written by Benjamin Kosnik <bkoz@redhat.com> 30 31#include <locale> 32#include <bits/c++locale_internal.h> 33 34namespace std _GLIBCXX_VISIBILITY(default) 35{ 36_GLIBCXX_BEGIN_NAMESPACE_VERSION 37 38 // These are basically extensions to char_traits, and perhaps should 39 // be put there instead of here. 40 template<> 41 int 42 collate<char>::_M_compare(const char* __one, 43 const char* __two) const throw() 44 { 45 int __cmp = __strcoll_l(__one, __two, _M_c_locale_collate); 46 return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0); 47 } 48 49 template<> 50 size_t 51 collate<char>::_M_transform(char* __to, const char* __from, 52 size_t __n) const throw() 53 { return __strxfrm_l(__to, __from, __n, _M_c_locale_collate); } 54 55#ifdef _GLIBCXX_USE_WCHAR_T 56 template<> 57 int 58 collate<wchar_t>::_M_compare(const wchar_t* __one, 59 const wchar_t* __two) const throw() 60 { 61 int __cmp = __wcscoll_l(__one, __two, _M_c_locale_collate); 62 return (__cmp >> (8 * sizeof (int) - 2)) | (__cmp != 0); 63 } 64 65 template<> 66 size_t 67 collate<wchar_t>::_M_transform(wchar_t* __to, const wchar_t* __from, 68 size_t __n) const throw() 69 { return __wcsxfrm_l(__to, __from, __n, _M_c_locale_collate); } 70#endif 71 72_GLIBCXX_END_NAMESPACE_VERSION 73} // namespace 74