refactor to more use of auto c++11 keyword (#1404)

refactor to more use of auto c++11 keyword

include/libtorrent/enum_net.hpp

@@ -140,16 +140,16 @@ namespace libtorrent
 
 			bool found = false;
 
-			for (int i = 0; i < int(ifs.size()); ++i)
+			for (auto const& iface : ifs)
 			{
 				// we're looking for a specific interface, and its address
 				// (which must be of the same family as the address we're
 				// connecting to)
-				if (strcmp(ifs[i].name, device_name) != 0) continue;
-				if (ifs[i].interface_address.is_v4() != (protocol == boost::asio::ip::tcp::v4()))
+				if (std::strcmp(iface.name, device_name) != 0) continue;
+				if (iface.interface_address.is_v4() != (protocol == boost::asio::ip::tcp::v4()))
 					continue;
 
-				bind_ep.address(ifs[i].interface_address);
+				bind_ep.address(iface.interface_address);
 				found = true;
 				break;
 			}

include/libtorrent/tracker_manager.hpp

@@ -393,12 +393,9 @@ namespace libtorrent
 		// maps transactionid to the udp_tracker_connection
 		// These must use shared_ptr to avoid a dangling reference
 		// if a connection is erased while a timeout event is in the queue
-		using udp_conns_t = std::unordered_map<std::uint32_t
-			, std::shared_ptr<udp_tracker_connection>> ;
-		udp_conns_t m_udp_conns;
+		std::unordered_map<std::uint32_t, std::shared_ptr<udp_tracker_connection>> m_udp_conns;
 
-		using http_conns_t = std::vector<std::shared_ptr<http_tracker_connection>>;
-		http_conns_t m_http_conns;
+		std::vector<std::shared_ptr<http_tracker_connection>> m_http_conns;
 
 		send_fun_t m_send_fun;
 		send_fun_hostname_t m_send_fun_hostname;

src/choker.cpp

@@ -265,11 +265,10 @@ namespace libtorrent
 		, aux::session_settings const& sett)
 	{
 #if TORRENT_USE_ASSERTS
-		for (std::vector<peer_connection*>::iterator i = peers.begin()
-			, end(peers.end()); i != end; ++i)
+		for (auto p : peers)
 		{
-			TORRENT_ASSERT((*i)->self());
-			TORRENT_ASSERT((*i)->associated_torrent().lock());
+			TORRENT_ASSERT(p->self());
+			TORRENT_ASSERT(p->associated_torrent().lock());
 		}
 #endif
 
@@ -288,10 +287,8 @@ namespace libtorrent
 		if (sett.get_int(settings_pack::choking_algorithm)
 			== settings_pack::bittyrant_choker)
 		{
-			for (std::vector<peer_connection*>::const_iterator i = peers.begin()
-				, end(peers.end()); i != end; ++i)
+			for (auto const p : peers)
 			{
-				peer_connection* p = *i;
 				if (p->is_choked() || !p->is_interesting()) continue;
 
 				if (!p->has_peer_choked())
@@ -320,10 +317,8 @@ namespace libtorrent
 			// until there none left
 			upload_slots = 0;
 
-			for (std::vector<peer_connection*>::iterator i = peers.begin()
-				, end(peers.end()); i != end; ++i)
+			for (auto const p : peers)
 			{
-				peer_connection* p = *i;
 				TORRENT_ASSERT(p);
 
 				if (p->est_reciprocation_rate() > upload_capacity_left) break;
@@ -363,11 +358,9 @@ namespace libtorrent
 			// TODO: make configurable
 			int rate_threshold = 1024;
 
-			for (std::vector<peer_connection*>::const_iterator i = peers.begin()
-				, end(peers.end()); i != end; ++i)
+			for (auto const p : peers)
 			{
-				peer_connection const& p = **i;
-				int const rate = int(p.uploaded_in_last_round()
+				int const rate = int(p->uploaded_in_last_round()
 					* 1000 / total_milliseconds(unchoke_interval));
 
 				if (rate < rate_threshold) break;

src/enum_net.cpp

@@ -1149,8 +1149,8 @@ namespace libtorrent
 		std::vector<ip_interface> ifs = enum_net_interfaces(ios, ec);
 		if (ec) return false;
 
-		for (int i = 0; i < int(ifs.size()); ++i)
-			if (ifs[i].name == name) return true;
+		for (auto const& iface : ifs)
+			if (iface.name == name) return true;
 		return false;
 	}
 
@@ -1161,8 +1161,8 @@ namespace libtorrent
 		std::vector<ip_interface> ifs = enum_net_interfaces(ios, ec);
 		if (ec) return std::string();
 
-		for (int i = 0; i < int(ifs.size()); ++i)
-			if (ifs[i].interface_address == addr) return ifs[i].name;
+		for (auto const& iface : ifs)
+			if (iface.interface_address == addr) return iface.name;
 		return std::string();
 	}
 }

src/natpmp.cpp

@@ -234,7 +234,7 @@ int natpmp::add_mapping(portmap_protocol const p, int const external_port
 
 	if (m_disabled) return -1;
 
-	std::vector<mapping_t>::iterator i = std::find_if(m_mappings.begin()
+	auto i = std::find_if(m_mappings.begin()
 		, m_mappings.end(), [] (mapping_t const& m) { return m.protocol == portmap_protocol::none; });
 	if (i == m_mappings.end())
 	{
@@ -275,7 +275,7 @@ void natpmp::try_next_mapping(int const i)
 		return;
 	}
 
-	std::vector<mapping_t>::iterator const m = std::find_if(
+	auto const m = std::find_if(
 		m_mappings.begin(), m_mappings.end()
 		, [] (mapping_t const& ma) { return ma.act != mapping_t::action::none; });
 

src/part_file.cpp

@@ -180,7 +180,7 @@ namespace libtorrent
 		if (ec) return -1;
 
 		int slot = -1;
-		std::unordered_map<int, int>::iterator i = m_piece_map.find(piece);
+		auto const i = m_piece_map.find(piece);
 		if (i == m_piece_map.end())
 			slot = allocate_slot(piece);
 		else
@@ -198,7 +198,7 @@ namespace libtorrent
 		TORRENT_ASSERT(offset >= 0);
 		std::unique_lock<std::mutex> l(m_mutex);
 
-		std::unordered_map<int, int>::iterator i = m_piece_map.find(piece);
+		auto const i = m_piece_map.find(piece);
 		if (i == m_piece_map.end())
 		{
 			ec = error_code(boost::system::errc::no_such_file_or_directory
@@ -242,7 +242,7 @@ namespace libtorrent
 	{
 		std::lock_guard<std::mutex> l(m_mutex);
 
-		std::unordered_map<int, int>::iterator i = m_piece_map.find(piece);
+		auto const i = m_piece_map.find(piece);
 		if (i == m_piece_map.end()) return;
 
 		// TODO: what do we do if someone is currently reading from the disk
@@ -310,7 +310,7 @@ namespace libtorrent
 		std::int64_t file_offset = 0;
 		for (; piece < end; ++piece)
 		{
-			std::unordered_map<int, int>::iterator i = m_piece_map.find(piece);
+			auto const i = m_piece_map.find(piece);
 			int const block_to_copy = int((std::min)(m_piece_size - piece_offset, size));
 			if (i != m_piece_map.end())
 			{
@@ -345,7 +345,7 @@ namespace libtorrent
 					// another thread removed this slot map entry, and invalidated
 					// our iterator. Now that we hold the lock again, perform
 					// another lookup to be sure.
-					std::unordered_map<int, int>::iterator j = m_piece_map.find(piece);
+					auto const j = m_piece_map.find(piece);
 					if (j != m_piece_map.end())
 					{
 						// if the slot moved, that's really suspicious
@@ -404,7 +404,7 @@ namespace libtorrent
 
 		for (int piece = 0; piece < m_max_pieces; ++piece)
 		{
-			std::unordered_map<int, int>::iterator i = m_piece_map.find(piece);
+			auto const i = m_piece_map.find(piece);
 			int slot = 0xffffffff;
 			if (i != m_piece_map.end())
 				slot = i->second;

src/peer_class_set.cpp

@@ -58,8 +58,7 @@ namespace libtorrent
 
 	void peer_class_set::remove_class(peer_class_pool& pool, peer_class_t const c)
 	{
-		std::array<peer_class_t, 15>::iterator i = std::find(m_class.begin()
-			, m_class.begin() + m_size, c);
+		auto const i = std::find(m_class.begin(), m_class.begin() + m_size, c);
 		int idx = int(i - m_class.begin());
 		if (idx == m_size) return; // not found
 		if (idx < m_size - 1)

src/peer_connection.cpp

@@ -2277,7 +2277,7 @@ namespace libtorrent
 		}
 
 		int fast_idx = -1;
-		std::vector<int>::iterator fast_iter = std::find(m_accept_fast.begin()
+		auto const fast_iter = std::find(m_accept_fast.begin()
 			, m_accept_fast.end(), r.piece);
 		if (fast_iter != m_accept_fast.end()) fast_idx = int(fast_iter - m_accept_fast.begin());
 

src/session_impl.cpp

@@ -4173,10 +4173,8 @@ namespace aux {
 
 		// go through all the peers and unchoke the first ones and choke
 		// all the other ones.
-		for (std::vector<peer_connection*>::iterator i = peers.begin()
-			, end(peers.end()); i != end; ++i)
+		for (auto p : peers)
 		{
-			peer_connection* p = *i;
 			TORRENT_ASSERT(p);
 			TORRENT_ASSERT(!p->ignore_unchoke_slots());
 

src/stat_cache.cpp

@@ -113,7 +113,7 @@ namespace libtorrent
 
 	int stat_cache::add_error(error_code const& ec)
 	{
-		std::vector<error_code>::iterator i = std::find(m_errors.begin(), m_errors.end(), ec);
+		auto const i = std::find(m_errors.begin(), m_errors.end(), ec);
 		if (i != m_errors.end()) return int(i - m_errors.begin());
 		m_errors.push_back(ec);
 		return int(m_errors.size()) - 1;

src/tracker_manager.cpp

@@ -235,7 +235,7 @@ namespace libtorrent
 	void tracker_manager::remove_request(http_tracker_connection const* c)
 	{
 		TORRENT_ASSERT(is_single_thread());
-		http_conns_t::iterator i = std::find_if(m_http_conns.begin(), m_http_conns.end()
+		auto const i = std::find_if(m_http_conns.begin(), m_http_conns.end()
 			, [c] (std::shared_ptr<http_tracker_connection> const& ptr) { return ptr.get() == c; });
 		if (i != m_http_conns.end())
 		{
@@ -283,18 +283,14 @@ namespace libtorrent
 		if (protocol == "http")
 #endif
 		{
-			std::shared_ptr<http_tracker_connection> con
-				= std::make_shared<http_tracker_connection>(
-					std::ref(ios), std::ref(*this), std::cref(req), c);
+			auto con = std::make_shared<http_tracker_connection>(ios, *this, req, c);
 			m_http_conns.push_back(con);
 			con->start();
 			return;
 		}
 		else if (protocol == "udp")
 		{
-			std::shared_ptr<udp_tracker_connection> con
-				= std::make_shared<udp_tracker_connection>(
-					std::ref(ios), std::ref(*this), std::cref(req) , c);
+			auto con = std::make_shared<udp_tracker_connection>(ios, *this, req, c);
 			m_udp_conns[con->transaction_id()] = con;
 			con->start();
 			return;
@@ -331,7 +327,7 @@ namespace libtorrent
 		if (action > 3) return false;
 
 		std::uint32_t const transaction = aux::read_uint32(ptr);
-		udp_conns_t::iterator const i = m_udp_conns.find(transaction);
+		auto const i = m_udp_conns.find(transaction);
 
 		if (i == m_udp_conns.end())
 		{
@@ -372,7 +368,7 @@ namespace libtorrent
 		if (action > 3) return false;
 
 		std::uint32_t const transaction = aux::read_uint32(ptr);
-		udp_conns_t::iterator const i = m_udp_conns.find(transaction);
+		auto const i = m_udp_conns.find(transaction);
 
 		if (i == m_udp_conns.end())
 		{
@@ -413,28 +409,25 @@ namespace libtorrent
 		// removes all connections except 'event=stopped'-requests
 
 		m_abort = true;
-		http_conns_t close_http_connections;
+		std::vector<std::shared_ptr<http_tracker_connection>> close_http_connections;
 		std::vector<std::shared_ptr<udp_tracker_connection>> close_udp_connections;
 
-		for (http_conns_t::iterator i = m_http_conns.begin()
-			, end(m_http_conns.end()); i != end; ++i)
+		for (auto const& c : m_http_conns)
 		{
-			http_tracker_connection* c = i->get();
 			tracker_request const& req = c->tracker_req();
 			if (req.event == tracker_request::stopped && !all)
 				continue;
 
-			close_http_connections.push_back(*i);
+			close_http_connections.push_back(c);
 
 #ifndef TORRENT_DISABLE_LOGGING
 			std::shared_ptr<request_callback> rc = c->requester();
 			if (rc) rc->debug_log("aborting: %s", req.url.c_str());
 #endif
 		}
-		for (udp_conns_t::iterator i = m_udp_conns.begin()
-			, end(m_udp_conns.end()); i != end; ++i)
+		for (auto const& p : m_udp_conns)
 		{
-			std::shared_ptr<udp_tracker_connection> c = i->second;
+			auto const& c = p.second;
 			tracker_request const& req = c->tracker_req();
 			if (req.event == tracker_request::stopped && !all)
 				continue;
@@ -447,10 +440,9 @@ namespace libtorrent
 #endif
 		}
 
-		for (http_conns_t::iterator i = close_http_connections.begin()
-			, end(close_http_connections.end()); i != end; ++i)
+		for (auto const& c : close_http_connections)
 		{
-			(*i)->close();
+			c->close();
 		}
 
 		for (auto const& c : close_udp_connections)

src/upnp.cpp

@@ -762,7 +762,7 @@ void upnp::next(rootdevice& d, int i)
 	}
 	else
 	{
-		std::vector<mapping_t>::iterator j = std::find_if(d.mapping.begin(), d.mapping.end()
+		auto const j = std::find_if(d.mapping.begin(), d.mapping.end()
 			, [] (mapping_t const& m) { return m.act != mapping_t::action::none; });
 		if (j == d.mapping.end()) return;
 

src/ut_metadata.cpp

@@ -366,7 +366,7 @@ namespace libtorrent { namespace
 				break;
 				case metadata_piece:
 				{
-					std::vector<int>::iterator i = std::find(m_sent_requests.begin()
+					auto const i = std::find(m_sent_requests.begin()
 						, m_sent_requests.end(), piece);
 
 					// unwanted piece?
@@ -389,7 +389,7 @@ namespace libtorrent { namespace
 				case metadata_dont_have:
 				{
 					m_request_limit = (std::max)(aux::time_now() + minutes(1), m_request_limit);
-					std::vector<int>::iterator i = std::find(m_sent_requests.begin()
+					auto const i = std::find(m_sent_requests.begin()
 						, m_sent_requests.end(), piece);
 					// unwanted piece?
 					if (i == m_sent_requests.end()) return true;