new .cpp directory

2006-12-08 14:17:36 +00:00
parent 460dfd76a5
commit 406135df66
38 changed files with 53 additions and 46 deletions
--- a/library/cpp/stat.cpp
+++ b/library/cpp/stat.cpp
@@ -0,0 +1,91 @@
+/*
+
+Copyright (c) 2003, Arvid Norberg
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in
+      the documentation and/or other materials provided with the distribution.
+    * Neither the name of the author nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+*/
+
+// TODO: Use two algorithms to estimate transfer rate.
+// one (simple) for transfer rates that are >= 1 packet
+// per second and one (low pass-filter) for rates < 1
+// packet per second.
+
+#include <numeric>
+
+#include "libtorrent/stat.hpp"
+#include "libtorrent/invariant_check.hpp"
+#include <algorithm>
+
+#if defined _MSC_VER && _MSC_VER <= 1200
+#define for if (false) {} else for
+#endif
+
+using namespace libtorrent;
+
+void libtorrent::stat::second_tick(float tick_interval)
+{
+	INVARIANT_CHECK;
+
+	for (int i = history - 2; i >= 0; --i)
+	{
+		m_download_rate_history[i + 1] = m_download_rate_history[i];
+		m_upload_rate_history[i + 1] = m_upload_rate_history[i];
+		m_download_payload_rate_history[i + 1] = m_download_payload_rate_history[i];
+		m_upload_payload_rate_history[i + 1] = m_upload_payload_rate_history[i];
+	}
+
+	m_download_rate_history[0] = (m_downloaded_payload + m_downloaded_protocol)
+		/ tick_interval;
+	m_upload_rate_history[0] = (m_uploaded_payload + m_uploaded_protocol)
+		/ tick_interval;
+	m_download_payload_rate_history[0] = m_downloaded_payload / tick_interval;
+	m_upload_payload_rate_history[0] = m_uploaded_payload / tick_interval;
+
+	m_downloaded_payload = 0;
+	m_uploaded_payload = 0;
+	m_downloaded_protocol = 0;
+	m_uploaded_protocol = 0;
+
+	m_mean_download_rate = 0;
+	m_mean_upload_rate = 0;
+	m_mean_download_payload_rate = 0;
+	m_mean_upload_payload_rate = 0;
+
+	for (int i = 0; i < history; ++i)
+	{
+		m_mean_download_rate += m_download_rate_history[i];
+		m_mean_upload_rate += m_upload_rate_history[i];
+		m_mean_download_payload_rate += m_download_payload_rate_history[i];
+		m_mean_upload_payload_rate += m_upload_payload_rate_history[i];
+	}
+
+	m_mean_download_rate /= history;
+	m_mean_upload_rate /= history;
+	m_mean_download_payload_rate /= history;
+	m_mean_upload_payload_rate /= history;
+}