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