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+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2012 Tatsuhiro Tsujikawa
+ *
+ * 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
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#include "NetStat.h"
+#include "wallclock.h"
+
+namespace aria2 {
+
+NetStat::NetStat()
+  : status_(NetStat::IDLE),
+    avgDownloadSpeed_(0),
+    avgUploadSpeed_(0),
+    sessionDownloadLength_(0),
+    sessionUploadLength_(0)
+{}
+
+NetStat::~NetStat() {}
+
+/**
+ * Returns current download speed in byte per sec.
+ */
+int NetStat::calculateDownloadSpeed()
+{
+  return downloadSpeed_.calculateSpeed();
+}
+
+int NetStat::calculateAvgDownloadSpeed()
+{
+  return avgDownloadSpeed_ = downloadSpeed_.calculateAvgSpeed();
+}
+
+int NetStat::calculateUploadSpeed()
+{
+  return uploadSpeed_.calculateSpeed();
+}
+
+int NetStat::calculateAvgUploadSpeed()
+{
+  return avgUploadSpeed_ = uploadSpeed_.calculateAvgSpeed();
+}
+
+void NetStat::updateDownloadLength(size_t bytes)
+{
+  downloadSpeed_.update(bytes);
+  sessionDownloadLength_ += bytes;
+}
+
+void NetStat::updateUploadLength(size_t bytes)
+{
+  uploadSpeed_.update(bytes);
+  sessionUploadLength_ += bytes;
+}
+
+int NetStat::getMaxDownloadSpeed() const
+{
+  return downloadSpeed_.getMaxSpeed();
+}
+
+int NetStat::getMaxUploadSpeed() const
+{
+  return uploadSpeed_.getMaxSpeed();
+}
+
+void NetStat::reset()
+{
+  downloadSpeed_.reset();
+  uploadSpeed_.reset();
+  downloadStartTime_ = global::wallclock();
+  status_ = IDLE;
+}
+
+void NetStat::downloadStart()
+{
+  reset();
+  status_ = ACTIVE;
+}
+
+void NetStat::downloadStop()
+{
+  calculateAvgDownloadSpeed();
+  calculateAvgUploadSpeed();
+  status_ = IDLE;
+}
+
+TransferStat NetStat::toTransferStat()
+{
+  TransferStat stat;
+  stat.downloadSpeed = calculateDownloadSpeed();
+  stat.uploadSpeed = calculateUploadSpeed();
+  stat.sessionDownloadLength = getSessionDownloadLength();
+  stat.sessionUploadLength = getSessionUploadLength();
+  return stat;
+}
+
+} // namespace aria2