concepts.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef NDN_UTIL_CONCEPTS_HPP
#define NDN_UTIL_CONCEPTS_HPP

#include <boost/concept/usage.hpp>
#include "../encoding/block.hpp"
#include "../encoding/encoding-buffer.hpp"

namespace ndn {

template<class X>
class WireEncodable
{
public:
  BOOST_CONCEPT_USAGE(WireEncodable)
  {
    Block block = j.wireEncode();
    block.size(); // avoid 'unused variable block'
  }

private:
  X j;
};

template<class X>
class WireEncodableWithEncodingBuffer
{
public:
  BOOST_CONCEPT_USAGE(WireEncodableWithEncodingBuffer)
  {
    EncodingEstimator estimator;
    size_t estimatedSize = j.wireEncode(estimator);

    EncodingBuffer encoder(estimatedSize, 0);
    j.wireEncode(encoder);
  }

private:
  X j;
};

template<class X>
class WireDecodable
{
public:
  BOOST_CONCEPT_USAGE(WireDecodable)
  {
    Block block;
    X j(block);
    j.wireDecode(block);
  }
};

template<class X>
class Hashable
{
public:
  BOOST_CONCEPT_USAGE(Hashable)
  {
    X hash;
    uint8_t* buf = 0;
    size_t size = hash.DigestSize();

    hash.Update(buf, size);
    hash.Final(buf);
    hash.Restart();
  }
};

} // namespace ndn

#endif // NDN_UTIL_CONCEPTS_HPP