copy elimination for ranges #part2

NTCPSession.cpp

@@ -666,7 +666,7 @@ namespace transport
 	{
 		m_IsSending = true;
 		std::vector<boost::asio::const_buffer> bufs;
-		for (auto it: msgs)
+		for (const auto& it: msgs)
 			bufs.push_back (CreateMsgBuffer (it));
 		boost::asio::async_write (m_Socket, bufs, boost::asio::transfer_all (),                      
         	std::bind(&NTCPSession::HandleSent, shared_from_this (), std::placeholders::_1, std::placeholders::_2, msgs));
@@ -716,7 +716,7 @@ namespace transport
 		{
 			if (m_SendQueue.size () < NTCP_MAX_OUTGOING_QUEUE_SIZE)	
 			{
-				for (auto it: msgs)
+				for (const auto& it: msgs)
 					m_SendQueue.push_back (it);
 			}
 			else
@@ -767,7 +767,7 @@ namespace transport
 			m_Thread = new std::thread (std::bind (&NTCPServer::Run, this));
 			// create acceptors
 			auto& addresses = context.GetRouterInfo ().GetAddresses ();
-			for (auto address: addresses)
+			for (const auto& address: addresses)
 			{
 				if (address->transportStyle == i2p::data::RouterInfo::eTransportNTCP)
 				{

RouterContext.cpp

@@ -112,7 +112,7 @@ namespace i2p
 	void RouterContext::UpdatePort (int port)
 	{
 		bool updated = false;
-		for (auto address : m_RouterInfo.GetAddresses ())
+		for (auto& address : m_RouterInfo.GetAddresses ())
 		{
 			if (address->port != port)
 			{	
@@ -127,7 +127,7 @@ namespace i2p
 	void RouterContext::UpdateAddress (const boost::asio::ip::address& host)
 	{
 		bool updated = false;
-		for (auto address : m_RouterInfo.GetAddresses ())
+		for (auto& address : m_RouterInfo.GetAddresses ())
 		{
 			if (address->host != host && address->IsCompatible (host))
 			{	
@@ -244,7 +244,7 @@ namespace i2p
 		m_RouterInfo.SetCaps (i2p::data::RouterInfo::eUnreachable | i2p::data::RouterInfo::eSSUTesting); // LU, B
 		// remove NTCP address
 		auto& addresses = m_RouterInfo.GetAddresses ();
-		for (auto it = addresses.begin (); it != addresses.end (); it++)
+		for (auto it = addresses.begin (); it != addresses.end (); ++it)
 		{
 			if ((*it)->transportStyle == i2p::data::RouterInfo::eTransportNTCP &&
 				(*it)->host.is_v4 ())
@@ -254,7 +254,7 @@ namespace i2p
 			}
 		}	
 		// delete previous introducers
-		for (auto addr : addresses)
+		for (auto& addr : addresses)
 			addr->introducers.clear ();
 	
 		// update
@@ -274,7 +274,7 @@ namespace i2p
 		
 		// insert NTCP back
 		auto& addresses = m_RouterInfo.GetAddresses ();
-		for (auto addr : addresses)
+		for (const auto& addr : addresses)
 		{
 			if (addr->transportStyle == i2p::data::RouterInfo::eTransportSSU &&
 				addr->host.is_v4 ())
@@ -285,7 +285,7 @@ namespace i2p
 			}
 		}		
 		// delete previous introducers
-		for (auto addr : addresses)
+		for (auto& addr : addresses)
 			addr->introducers.clear ();
 		
 		// update
@@ -316,7 +316,7 @@ namespace i2p
 		bool updated = false, found = false;	
 		int port = 0;
 		auto& addresses = m_RouterInfo.GetAddresses ();
-		for (auto addr: addresses)
+		for (auto& addr: addresses)
 		{
 			if (addr->host.is_v6 () && addr->transportStyle == i2p::data::RouterInfo::eTransportNTCP)
 			{

RouterInfo.cpp

@@ -369,19 +369,19 @@ namespace data
 		SetProperty ("caps", caps);
 	}
 		
-	void RouterInfo::WriteToStream (std::ostream& s)
+	void RouterInfo::WriteToStream (std::ostream& s) const
 	{
 		uint64_t ts = htobe64 (m_Timestamp);
-		s.write ((char *)&ts, sizeof (ts));
+		s.write ((const char *)&ts, sizeof (ts));
 
 		// addresses
 		uint8_t numAddresses = m_Addresses->size ();
 		s.write ((char *)&numAddresses, sizeof (numAddresses));
-		for (auto addr : *m_Addresses)
+		for (const auto& addr_ptr : *m_Addresses)
 		{
-			Address& address = *addr;
-			s.write ((char *)&address.cost, sizeof (address.cost));
-			s.write ((char *)&address.date, sizeof (address.date));
+			const Address& address = *addr_ptr;
+			s.write ((const char *)&address.cost, sizeof (address.cost));
+			s.write ((const char *)&address.date, sizeof (address.date));
 			std::stringstream properties;
 			if (address.transportStyle == eTransportNTCP)
 				WriteString ("NTCP", s);
@@ -410,7 +410,7 @@ namespace data
 				if (address.introducers.size () > 0)
 				{	
 					int i = 0;
-					for (auto introducer: address.introducers)
+					for (const auto& introducer: address.introducers)
 					{
 						WriteString ("ihost" + boost::lexical_cast<std::string>(i), properties);
 						properties << '=';
@@ -419,7 +419,7 @@ namespace data
 						i++;
 					}	
 					i = 0;
-					for (auto introducer: address.introducers)
+					for (const auto& introducer: address.introducers)
 					{
 						WriteString ("ikey" + boost::lexical_cast<std::string>(i), properties);
 						properties << '=';
@@ -431,7 +431,7 @@ namespace data
 						i++;
 					}	
 					i = 0;
-					for (auto introducer: address.introducers)
+					for (const auto& introducer: address.introducers)
 					{
 						WriteString ("iport" + boost::lexical_cast<std::string>(i), properties);
 						properties << '=';
@@ -440,7 +440,7 @@ namespace data
 						i++;
 					}	
 					i = 0;
-					for (auto introducer: address.introducers)
+					for (const auto& introducer: address.introducers)
 					{
 						WriteString ("itag" + boost::lexical_cast<std::string>(i), properties);
 						properties << '=';
@@ -482,7 +482,7 @@ namespace data
 
 		// properties
 		std::stringstream properties;
-		for (auto& p : m_Properties)
+		for (const auto& p : m_Properties)
 		{
 			WriteString (p.first, properties);
 			properties << '=';
@@ -570,10 +570,10 @@ namespace data
 		addr->cost = 2;
 		addr->date = 0;
 		addr->mtu = 0;
-		for (auto it: *m_Addresses) // don't insert same address twice
+		for (const auto& it: *m_Addresses) // don't insert same address twice
 			if (*it == *addr) return;
-		m_Addresses->push_back(addr);	
 		m_SupportedTransports |= addr->host.is_v6 () ? eNTCPV6 : eNTCPV4;
+		m_Addresses->push_back(std::move(addr));
 	}	
 
 	void RouterInfo::AddSSUAddress (const char * host, int port, const uint8_t * key, int mtu)
@@ -586,21 +586,22 @@ namespace data
 		addr->date = 0;
 		addr->mtu = mtu; 
 		memcpy (addr->key, key, 32);
-		for (auto it: *m_Addresses) // don't insert same address twice
+		for (const auto& it: *m_Addresses) // don't insert same address twice
 			if (*it == *addr) return;
-		m_Addresses->push_back(addr);	
 		m_SupportedTransports |= addr->host.is_v6 () ? eSSUV6 : eSSUV4;
-		m_Caps |= eSSUTesting; 
-		m_Caps |= eSSUIntroducer; 
+		m_Addresses->push_back(std::move(addr));
+
+		m_Caps |= eSSUTesting;
+		m_Caps |= eSSUIntroducer;
 	}	
 
 	bool RouterInfo::AddIntroducer (const Introducer& introducer)
 	{
-		for (auto addr : *m_Addresses)
+		for (auto& addr : *m_Addresses)
 		{
 			if (addr->transportStyle == eTransportSSU && addr->host.is_v4 ())
 			{	
-				for (auto intro: addr->introducers)
+				for (auto& intro: addr->introducers)
 					if (intro.iTag == introducer.iTag) return false; // already presented
 				addr->introducers.push_back (introducer);
 				return true;
@@ -611,16 +612,16 @@ namespace data
 
 	bool RouterInfo::RemoveIntroducer (const boost::asio::ip::udp::endpoint& e)
 	{		
-		for (auto addr: *m_Addresses)
+		for (auto& addr: *m_Addresses)
 		{
 			if (addr->transportStyle == eTransportSSU && addr->host.is_v4 ())
 			{	
-				for (std::vector<Introducer>::iterator it = addr->introducers.begin (); it != addr->introducers.end (); it++)
+				for (auto it = addr->introducers.begin (); it != addr->introducers.end (); ++it)
 					if ( boost::asio::ip::udp::endpoint (it->iHost, it->iPort) == e) 
 					{
 						addr->introducers.erase (it);
 						return true;
-					}	
+					}
 			}	
 		}	
 		return false;
@@ -707,7 +708,7 @@ namespace data
 				if (addr->host.is_v6 ())
 					it = m_Addresses->erase (it);
 				else
-					it++;
+					++it;
 			}	
 		}	
 	}
@@ -723,7 +724,7 @@ namespace data
 				if (addr->host.is_v4 ())
 					it = m_Addresses->erase (it);
 				else
-					it++;
+					++it;
 			}	
 		}	
 	}
@@ -751,8 +752,7 @@ namespace data
 		
 	std::shared_ptr<const RouterInfo::Address> RouterInfo::GetAddress (TransportStyle s, bool v4only, bool v6only) const
 	{
-		auto addresses = m_Addresses;
-		for (auto address : *addresses)
+		for (const auto& address : *m_Addresses)
 		{
 			if (address->transportStyle == s)
 			{	

RouterInfo.h

@@ -187,9 +187,9 @@ namespace data
 			void ReadFromFile ();
 			void ReadFromStream (std::istream& s);
 			void ReadFromBuffer (bool verifySignature);
-			void WriteToStream (std::ostream& s);
-			size_t ReadString (char * str, std::istream& s);
-			void WriteString (const std::string& str, std::ostream& s);
+			void WriteToStream (std::ostream& s) const;
+			static size_t ReadString (char* str, std::istream& s);
+			static void WriteString (const std::string& str, std::ostream& s);
 			void ExtractCaps (const char * value);
 			std::shared_ptr<const Address> GetAddress (TransportStyle s, bool v4only, bool v6only = false) const;
 			void UpdateCapsProperty ();