utils.h
/*
* Copyright (C) 2014-2017 Savoir-faire Linux Inc.
* Author : Adrien Béraud <adrien.beraud@savoirfairelinux.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 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 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 "def.h"
#include <msgpack.hpp>
#include <chrono>
#include <random>
#include <functional>
#include <map>
#include <cstdarg>
#define WANT4 1
#define WANT6 2
namespace dht {
using NetId = uint32_t;
using want_t = int_fast8_t;
// shortcut for std::shared_ptr
template<class T>
using Sp = std::shared_ptr<T>;
template <typename Key, typename Item, typename Condition>
void erase_if(std::map<Key, Item>& map, const Condition& condition)
{
for (auto it = map.begin(); it != map.end(); ) {
if (condition(*it)) {
it = map.erase(it);
} else { ++it; }
}
}
OPENDHT_PUBLIC std::pair<std::string, std::string>
splitPort(const std::string& s);
class OPENDHT_PUBLIC DhtException : public std::runtime_error {
public:
DhtException(const std::string &str = "") :
std::runtime_error("DhtException occurred: " + str) {}
};
class OPENDHT_PUBLIC SocketException : public DhtException {
public:
SocketException(int err) :
DhtException(strerror(err)) {}
};
// Time related definitions and utility functions
using clock = std::chrono::steady_clock;
using time_point = clock::time_point;
using duration = clock::duration;
time_point from_time_t(std::time_t t);
std::time_t to_time_t(time_point t);
template <class DT>
static double
print_dt(DT d) {
return std::chrono::duration_cast<std::chrono::duration<double>>(d).count();
}
template <typename Duration = duration>
class uniform_duration_distribution : public std::uniform_int_distribution<typename Duration::rep> {
using Base = std::uniform_int_distribution<typename Duration::rep>;
using param_type = typename Base::param_type;
public:
uniform_duration_distribution(Duration min, Duration max) : Base(min.count(), max.count()) {}
template <class Generator>
Duration operator()(Generator && g) {
return Duration(Base::operator()(g));
}
template< class Generator >
Duration operator()( Generator && g, const param_type& params ) {
return Duration(Base::operator()(g, params));
}
};
// Serialization related definitions and utility functions
using Blob = std::vector<uint8_t>;
OPENDHT_PUBLIC Blob unpackBlob(msgpack::object& o);
template <typename Type>
Blob
packMsg(const Type& t) {
msgpack::sbuffer buffer;
msgpack::packer<msgpack::sbuffer> pk(&buffer);
pk.pack(t);
return {buffer.data(), buffer.data()+buffer.size()};
}
template <typename Type>
Type
unpackMsg(Blob b) {
msgpack::unpacked msg_res = msgpack::unpack((const char*)b.data(), b.size());
return msg_res.get().as<Type>();
}
msgpack::unpacked unpackMsg(Blob b);
msgpack::object* findMapValue(msgpack::object& map, const std::string& key);
} // namespace dht
dht::DhtException
Definition: utils.h:63
dht::SocketException
Definition: utils.h:69
dht::uniform_duration_distribution
Definition: utils.h:94
dht
Definition: callbacks.h:34
dht::unpackBlob
OPENDHT_PUBLIC Blob unpackBlob(msgpack::object &o)
dht::splitPort
OPENDHT_PUBLIC std::pair< std::string, std::string > splitPort(const std::string &s)
dht::print_dt
static double print_dt(DT d)
Definition: utils.h:89
dht::Blob
std::vector< uint8_t > Blob
Definition: utils.h:114