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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
* Copyright (c) 2013-2014 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 "selectors.hpp"
#include "encoding/encoding-buffer.hpp"
#include "encoding/block-helpers.hpp"
#include "util/concepts.hpp"
namespace ndn {
BOOST_CONCEPT_ASSERT((boost::EqualityComparable<Selectors>));
BOOST_CONCEPT_ASSERT((WireEncodable<Selectors>));
BOOST_CONCEPT_ASSERT((WireDecodable<Selectors>));
static_assert(std::is_base_of<tlv::Error, Selectors::Error>::value,
"Selectors::Error must inherit from tlv::Error");
Selectors::Selectors()
: m_minSuffixComponents(-1)
, m_maxSuffixComponents(-1)
, m_childSelector(-1)
, m_mustBeFresh(false)
{
}
Selectors::Selectors(int minSuffixComponents, int maxSuffixComponents,
const Exclude& exclude,
int childSelector,
bool mustBeFresh)
: m_minSuffixComponents(minSuffixComponents)
, m_maxSuffixComponents(maxSuffixComponents)
, m_exclude(exclude)
, m_childSelector(childSelector)
, m_mustBeFresh(mustBeFresh)
{
}
Selectors::Selectors(const Block& wire)
{
wireDecode(wire);
}
bool
Selectors::empty() const
{
return m_minSuffixComponents < 0 &&
m_maxSuffixComponents < 0 &&
m_publisherPublicKeyLocator.empty() &&
m_exclude.empty() &&
m_childSelector < 0 &&
!m_mustBeFresh;
}
template<bool T>
size_t
Selectors::wireEncode(EncodingImpl<T>& block) const
{
size_t totalLength = 0;
// Selectors ::= SELECTORS-TYPE TLV-LENGTH
// MinSuffixComponents?
// MaxSuffixComponents?
// PublisherPublicKeyLocator?
// Exclude?
// ChildSelector?
// MustBeFresh?
// (reverse encoding)
// MustBeFresh
if (getMustBeFresh()) {
totalLength += prependBooleanBlock(block, tlv::MustBeFresh);
}
// ChildSelector
if (getChildSelector() >= 0) {
totalLength += prependNonNegativeIntegerBlock(block, tlv::ChildSelector, getChildSelector());
}
// Exclude
if (!getExclude().empty()) {
totalLength += getExclude().wireEncode(block);
}
// PublisherPublicKeyLocator
if (!getPublisherPublicKeyLocator().empty()) {
totalLength += getPublisherPublicKeyLocator().wireEncode(block);
}
// MaxSuffixComponents
if (getMaxSuffixComponents() >= 0) {
totalLength += prependNonNegativeIntegerBlock(block, tlv::MaxSuffixComponents,
getMaxSuffixComponents());
}
// MinSuffixComponents
if (getMinSuffixComponents() >= 0) {
totalLength += prependNonNegativeIntegerBlock(block, tlv::MinSuffixComponents,
getMinSuffixComponents());
}
totalLength += block.prependVarNumber(totalLength);
totalLength += block.prependVarNumber(tlv::Selectors);
return totalLength;
}
template size_t
Selectors::wireEncode<true>(EncodingImpl<true>& estimator) const;
template size_t
Selectors::wireEncode<false>(EncodingImpl<false>& encoder) const;
const Block&
Selectors::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
Selectors::wireDecode(const Block& wire)
{
if (wire.type() != tlv::Selectors)
throw tlv::Error("Unexpected TLV type when decoding Selectors");
*this = Selectors();
m_wire = wire;
m_wire.parse();
// MinSuffixComponents
Block::element_const_iterator val = m_wire.find(tlv::MinSuffixComponents);
if (val != m_wire.elements_end()) {
m_minSuffixComponents = readNonNegativeInteger(*val);
}
// MaxSuffixComponents
val = m_wire.find(tlv::MaxSuffixComponents);
if (val != m_wire.elements_end()) {
m_maxSuffixComponents = readNonNegativeInteger(*val);
}
// PublisherPublicKeyLocator
val = m_wire.find(tlv::KeyLocator);
if (val != m_wire.elements_end()) {
m_publisherPublicKeyLocator.wireDecode(*val);
}
// Exclude
val = m_wire.find(tlv::Exclude);
if (val != m_wire.elements_end()) {
m_exclude.wireDecode(*val);
}
// ChildSelector
val = m_wire.find(tlv::ChildSelector);
if (val != m_wire.elements_end()) {
m_childSelector = readNonNegativeInteger(*val);
}
// MustBeFresh
val = m_wire.find(tlv::MustBeFresh);
if (val != m_wire.elements_end()) {
m_mustBeFresh = true;
}
}
Selectors&
Selectors::setMinSuffixComponents(int minSuffixComponents)
{
m_minSuffixComponents = minSuffixComponents;
m_wire.reset();
return *this;
}
Selectors&
Selectors::setMaxSuffixComponents(int maxSuffixComponents)
{
m_maxSuffixComponents = maxSuffixComponents;
m_wire.reset();
return *this;
}
Selectors&
Selectors::setPublisherPublicKeyLocator(const KeyLocator& keyLocator)
{
m_publisherPublicKeyLocator = keyLocator;
m_wire.reset();
return *this;
}
Selectors&
Selectors::setExclude(const Exclude& exclude)
{
m_exclude = exclude;
m_wire.reset();
return *this;
}
Selectors&
Selectors::setChildSelector(int childSelector)
{
m_childSelector = childSelector;
m_wire.reset();
return *this;
}
Selectors&
Selectors::setMustBeFresh(bool mustBeFresh)
{
m_mustBeFresh = mustBeFresh;
m_wire.reset();
return *this;
}
bool
Selectors::operator==(const Selectors& other) const
{
return wireEncode() == other.wireEncode();
}
} // namespace ndn