54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
/**
|
|
This file is a part of rexy's general purpose library
|
|
Copyright (C) 2020 rexy712
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Affero General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Affero General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Affero General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef REXY_CX_STRING_HASH_HPP
|
|
#define REXY_CX_STRING_HASH_HPP
|
|
|
|
#include "hash.hpp"
|
|
#include "../string.hpp"
|
|
#include "string.hpp"
|
|
|
|
namespace rexy::cx{
|
|
|
|
//jenkns one at a time hash
|
|
template<class Str>
|
|
struct string_hash{
|
|
constexpr size_t operator()(const Str& s, size_t salt)const noexcept{
|
|
size_t hash = salt;
|
|
for(size_t i = 0;i < s.length();++i){
|
|
hash += s[i];
|
|
hash += (hash << 10);
|
|
hash += (hash >> 6);
|
|
}
|
|
hash += (hash << 3);
|
|
hash ^= (hash << 11);
|
|
hash += (hash << 15);
|
|
return hash;
|
|
}
|
|
};
|
|
template<>
|
|
struct hash<rexy::static_string> : public string_hash<rexy::static_string>{};
|
|
template<>
|
|
struct hash<rexy::string> : public string_hash<rexy::string>{};
|
|
template<size_t N>
|
|
struct hash<rexy::cx::string<N>> : public string_hash<rexy::cx::string<N>>{};
|
|
|
|
}
|
|
|
|
#endif
|