1 // std::tr1::hash definitions with new string -*- C++ -*- 2 3 // Copyright (C) 2014-2020 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 #define _GLIBCXX_USE_CXX11_ABI 1 26 #include <string> 27 28 #if ! _GLIBCXX_USE_DUAL_ABI 29 # error This file should not be compiled for this configuration. 30 #endif 31 32 #include <tr1/functional> 33 namespace std _GLIBCXX_VISIBILITY(default) 34 { 35 namespace tr1 36 { 37 template<> 38 size_t operator ()(string __s) const39 hash<string>::operator()(string __s) const 40 { return _Fnv_hash::hash(__s.data(), __s.length()); } 41 42 template<> 43 size_t operator ()(const string & __s) const44 hash<const string&>::operator()(const string& __s) const 45 { return _Fnv_hash::hash(__s.data(), __s.length()); } 46 47 #ifdef _GLIBCXX_USE_WCHAR_T 48 template<> 49 size_t operator ()(wstring __s) const50 hash<wstring>::operator()(wstring __s) const 51 { return _Fnv_hash::hash(__s.data(), __s.length() * sizeof(wchar_t)); } 52 53 template<> 54 size_t operator ()(const wstring & __s) const55 hash<const wstring&>::operator()(const wstring& __s) const 56 { return _Fnv_hash::hash(__s.data(), __s.length() * sizeof(wchar_t)); } 57 #endif 58 } 59 } 60