From 5f387071d339892ebed5accba92f91f997396476 Mon Sep 17 00:00:00 2001
From: Peter Powell <petpow@saberuk.com>
Date: Sun, 21 Jul 2019 16:56:55 +0100
Subject: [PATCH] Add a method for swapping user I/O handlers.

---
 include/inspsocket.h   |  7 +++++++
 include/socketengine.h |  6 ++++++
 include/users.h        |  5 +++++
 src/inspsocket.cpp     | 14 ++++++++++++++
 src/socketengine.cpp   |  6 ++++++
 src/users.cpp          |  6 ++++++
 6 files changed, 44 insertions(+)

diff --git a/include/inspsocket.h b/include/inspsocket.h
index a07c2eb6f..208644645 100644
--- a/include/inspsocket.h
+++ b/include/inspsocket.h
@@ -275,7 +275,14 @@ class CoreExport StreamSocket : public EventHandler
 	int HookChainRead(IOHook* hook, std::string& rq);
 
  protected:
+	/** The data which has been received from the socket. */
 	std::string recvq;
+
+	/** Swaps the internals of this StreamSocket with another one.
+	 * @param other A StreamSocket to swap internals with.
+	 */
+	void SwapInternals(StreamSocket& other);
+
  public:
 	const Type type;
 	StreamSocket(Type sstype = SS_UNKNOWN)
diff --git a/include/socketengine.h b/include/socketengine.h
index d8d127f8b..9202c179d 100644
--- a/include/socketengine.h
+++ b/include/socketengine.h
@@ -164,6 +164,12 @@ class CoreExport EventHandler : public classbase
 	 * registered with the SocketEngine
 	 */
 	int fd;
+
+	/** Swaps the internals of this EventHandler with another one.
+	 * @param other A EventHandler to swap internals with.
+	 */
+	void SwapInternals(EventHandler& other);
+
  public:
 	/** Get the current file descriptor
 	 * @return The file descriptor of this handler
diff --git a/include/users.h b/include/users.h
index dc7da40fe..94a8af9a4 100644
--- a/include/users.h
+++ b/include/users.h
@@ -700,6 +700,11 @@ class CoreExport UserIOHandler : public StreamSocket
 	 * @param data The data to add to the write buffer
 	 */
 	void AddWriteBuf(const std::string &data);
+
+	/** Swaps the internals of this UserIOHandler with another one.
+	 * @param other A UserIOHandler to swap internals with.
+	 */
+	void SwapInternals(UserIOHandler& other);
 };
 
 typedef unsigned int already_sent_t;
diff --git a/src/inspsocket.cpp b/src/inspsocket.cpp
index 684ee051d..44fe7b72b 100644
--- a/src/inspsocket.cpp
+++ b/src/inspsocket.cpp
@@ -541,3 +541,17 @@ size_t StreamSocket::getSendQSize() const
 	}
 	return ret;
 }
+
+void StreamSocket::SwapInternals(StreamSocket& other)
+{
+	if (type != other.type)
+		return;
+
+	EventHandler::SwapInternals(other);
+	std::swap(closeonempty, other.closeonempty);
+	std::swap(closing, other.closing);
+	std::swap(error, other.error);
+	std::swap(iohook, other.iohook);
+	std::swap(recvq, other.recvq);
+	std::swap(sendq, other.sendq);
+}
diff --git a/src/socketengine.cpp b/src/socketengine.cpp
index df6ff5a02..f447fded8 100644
--- a/src/socketengine.cpp
+++ b/src/socketengine.cpp
@@ -50,6 +50,12 @@ EventHandler::EventHandler()
 	event_mask = 0;
 }
 
+void EventHandler::SwapInternals(EventHandler& other)
+{
+	std::swap(fd, other.fd);
+	std::swap(event_mask, other.event_mask);
+}
+
 void EventHandler::SetFd(int FD)
 {
 	this->fd = FD;
diff --git a/src/users.cpp b/src/users.cpp
index c0dc69ff4..26353ab24 100644
--- a/src/users.cpp
+++ b/src/users.cpp
@@ -301,6 +301,12 @@ void UserIOHandler::AddWriteBuf(const std::string &data)
 	WriteData(data);
 }
 
+void UserIOHandler::SwapInternals(UserIOHandler& other)
+{
+	StreamSocket::SwapInternals(other);
+	std::swap(checked_until, other.checked_until);
+}
+
 bool UserIOHandler::OnSetEndPoint(const irc::sockets::sockaddrs& server, const irc::sockets::sockaddrs& client)
 {
 	memcpy(&user->server_sa, &server, sizeof(irc::sockets::sockaddrs));
-- 
2.39.2