1 files changed, 78 insertions, 0 deletions
diff --git a/libktorrent/net/speed.cpp b/libktorrent/net/speed.cpp
new file mode 100644
index 0000000..aa57513
--- /dev/null
+++ b/libktorrent/net/speed.cpp
@@ -0,0 +1,78 @@
+/***************************************************************************
+ *   Copyright (C) 2005 by Joris Guisson                                   *
+ *   joris.guisson@gmail.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, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.          *
+ ***************************************************************************/
+#include <util/log.h>
+#include <util/timer.h>
+#include <util/functions.h>
+#include "speed.h"
+
+using namespace bt;
+
+namespace net
+{
+	const Uint64 SPEED_INTERVAL = 5000;
+
+	Speed::Speed() : rate(0),bytes(0)
+	{}
+
+
+	Speed::~Speed()
+	{}
+	
+	void Speed::onData(Uint32 b,bt::TimeStamp ts)
+	{
+		dlrate.append(qMakePair(b,ts));
+		bytes += b;
+	}
+
+	void Speed::update(bt::TimeStamp now)
+	{	
+		QValueList<QPair<Uint32,TimeStamp> >::iterator i = dlrate.begin();
+		while (i != dlrate.end())
+		{
+			QPair<Uint32,TimeStamp> & p = *i;
+			if (now - p.second > SPEED_INTERVAL || now < p.second)
+			{
+				if (bytes >= p.first) // make sure we don't wrap around
+					bytes -= p.first; // subtract bytes
+				else
+					bytes = 0;
+				i = dlrate.erase(i);
+			}
+			else
+			{	
+				// seeing that newer entries are appended, they are in the list chronologically
+				// so once we hit an entry which is in the interval, we can just break out of the loop
+				// because all following entries will be in the interval
+				break;
+			}
+		}
+			
+		if (bytes == 0)
+		{
+			rate = 0;
+		}
+		else
+		{
+			//	Out() << "bytes = " << bytes << " d = " << d << endl;
+			rate = (float) bytes / (float)(SPEED_INTERVAL * 0.001);
+		}
+	}
+
+}