mgmt: encode/decode CS Information Dataset
refs #4219
Change-Id: Ia51b455fc9b16f8f3c468de2847ced6d73a87bdc
diff --git a/src/mgmt/nfd/cs-info.cpp b/src/mgmt/nfd/cs-info.cpp
new file mode 100644
index 0000000..b776c53
--- /dev/null
+++ b/src/mgmt/nfd/cs-info.cpp
@@ -0,0 +1,137 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013-2017 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library 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 Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#include "cs-info.hpp"
+#include "encoding/block-helpers.hpp"
+#include "encoding/encoding-buffer.hpp"
+#include "encoding/tlv-nfd.hpp"
+#include "util/concepts.hpp"
+
+namespace ndn {
+namespace nfd {
+
+BOOST_CONCEPT_ASSERT((StatusDatasetItem<CsInfo>));
+
+CsInfo::CsInfo()
+ : m_nHits(0)
+ , m_nMisses(0)
+{
+}
+
+CsInfo::CsInfo(const Block& block)
+{
+ this->wireDecode(block);
+}
+
+template<encoding::Tag TAG>
+size_t
+CsInfo::wireEncode(EncodingImpl<TAG>& encoder) const
+{
+ size_t totalLength = 0;
+
+ totalLength += prependNonNegativeIntegerBlock(encoder, tlv::nfd::NMisses, m_nMisses);
+ totalLength += prependNonNegativeIntegerBlock(encoder, tlv::nfd::NHits, m_nHits);
+
+ totalLength += encoder.prependVarNumber(totalLength);
+ totalLength += encoder.prependVarNumber(tlv::nfd::CsInfo);
+ return totalLength;
+}
+
+NDN_CXX_DEFINE_WIRE_ENCODE_INSTANTIATIONS(CsInfo);
+
+const Block&
+CsInfo::wireEncode() const
+{
+ if (m_wire.hasWire())
+ return m_wire;
+
+ EncodingEstimator estimator;
+ size_t estimatedSize = wireEncode(estimator);
+
+ EncodingBuffer buffer(estimatedSize, 0);
+ wireEncode(buffer);
+
+ m_wire = buffer.block();
+ return m_wire;
+}
+
+void
+CsInfo::wireDecode(const Block& block)
+{
+ if (block.type() != tlv::nfd::CsInfo) {
+ BOOST_THROW_EXCEPTION(Error("expecting CsInfo block, got " + to_string(block.type())));
+ }
+ m_wire = block;
+ m_wire.parse();
+ auto val = m_wire.elements_begin();
+
+ if (val != m_wire.elements_end() && val->type() == tlv::nfd::NHits) {
+ m_nHits = readNonNegativeInteger(*val);
+ ++val;
+ }
+ else {
+ BOOST_THROW_EXCEPTION(Error("missing required NHits field"));
+ }
+
+ if (val != m_wire.elements_end() && val->type() == tlv::nfd::NMisses) {
+ m_nMisses = readNonNegativeInteger(*val);
+ ++val;
+ }
+ else {
+ BOOST_THROW_EXCEPTION(Error("missing required NMisses field"));
+ }
+}
+
+CsInfo&
+CsInfo::setNHits(uint64_t nHits)
+{
+ m_wire.reset();
+ m_nHits = nHits;
+ return *this;
+}
+
+CsInfo&
+CsInfo::setNMisses(uint64_t nMisses)
+{
+ m_wire.reset();
+ m_nMisses = nMisses;
+ return *this;
+}
+
+bool
+operator==(const CsInfo& a, const CsInfo& b)
+{
+ return a.getNHits() == b.getNHits() &&
+ a.getNMisses() == b.getNMisses();
+}
+
+std::ostream&
+operator<<(std::ostream& os, const CsInfo& status)
+{
+ os << "CS: "
+ << status.getNHits() << (status.getNHits() == 1 ? " hit" : " hits")
+ << ", "
+ << status.getNMisses() << (status.getNMisses() == 1 ? " miss" : " misses");
+ return os;
+}
+
+} // namespace nfd
+} // namespace ndn