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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 <cstdint>
#include <cstring>
#include "Encoder.h"
namespace dcpp {
using std::find_if;
class CID {
public:
enum { SIZE = 192 / 8 };
CID() { memset(cid, 0, sizeof(cid)); }
explicit CID(const uint8_t* data) { memcpy(cid, data, sizeof(cid)); }
explicit CID(const string& base32) { Encoder::fromBase32(base32.c_str(), cid, sizeof(cid)); }
bool operator==(const CID& rhs) const { return memcmp(cid, rhs.cid, sizeof(cid)) == 0; }
bool operator<(const CID& rhs) const { return memcmp(cid, rhs.cid, sizeof(cid)) < 0; }
string toBase32() const { return Encoder::toBase32(cid, sizeof(cid)); }
string& toBase32(string& tmp) const { return Encoder::toBase32(cid, sizeof(cid), tmp); }
size_t toHash() const {
// RVO should handle this as efficiently as reinterpret_cast version
size_t cidHash;
memcpy(&cidHash, cid, sizeof(size_t));
return cidHash;
}
const uint8_t* data() const { return cid; }
explicit operator bool() const { return find_if(cid, cid + SIZE, [](uint8_t c) { return c != 0; }) != cid + SIZE; }
static CID generate();
private:
uint8_t cid[SIZE];
};
} // namespace dcpp
namespace std {
template<>
struct hash<dcpp::CID> {
size_t operator()(const dcpp::CID& cid) const {
return cid.toHash();
}
};
}
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