1 // std::collate implementation details, generic 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 38 _GLIBCXX_BEGIN_NAMESPACE(std) 39 40 // These are basically extensions to char_traits, and perhaps should 41 // be put there instead of here. 42 template<> 43 int 44 collate<char>::_M_compare(const char* __one, const char* __two) const 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 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 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 70 { return wcsxfrm(__to, __from, __n); } 71 #endif 72 73 _GLIBCXX_END_NAMESPACE 74