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/*
* Copyright (C) 2001-2019 Jacek Sieka, arnetheduck on gmail point com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include <algorithm>
#include "FastAlloc.h"
#include "Encoder.h"
namespace dcpp {
template<class Hasher>
struct HashValue : FastAlloc<HashValue<Hasher> >{
static const size_t BITS = Hasher::BITS;
static const size_t BYTES = Hasher::BYTES;
HashValue() { memset(data, 0, BYTES); }
explicit HashValue(const uint8_t* aData) { memcpy(data, aData, BYTES); }
explicit HashValue(const std::string& base32) { Encoder::fromBase32(base32.c_str(), data, BYTES); }
bool operator!=(const HashValue& rhs) const { return !(*this == rhs); }
bool operator==(const HashValue& rhs) const { return memcmp(data, rhs.data, BYTES) == 0; }
bool operator<(const HashValue& rhs) const { return memcmp(data, rhs.data, BYTES) < 0; }
std::string toBase32() const { return Encoder::toBase32(data, BYTES); }
std::string& toBase32(std::string& tmp) const { return Encoder::toBase32(data, BYTES, tmp); }
explicit operator bool() const { return find_if(data, data + BYTES, [](uint8_t c) { return c != 0; }) != data + BYTES; }
uint8_t data[BYTES];
};
} // namespace dcpp
namespace std {
template<typename T>
struct hash<dcpp::HashValue<T> > {
size_t operator()(const dcpp::HashValue<T>& rhs) const {
// RVO should handle this as efficiently as reinterpret_cast
size_t hvHash;
memcpy(&hvHash, rhs.data, sizeof(size_t));
return hvHash;
}
};
}
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