src/encoding/block-helpers.hpp

/* -*- 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.
 *
 * @author Alexander Afanasyev <http://lasr.cs.ucla.edu/afanasyev/index.html>
 */

#ifndef NDN_ENCODING_BLOCK_HELPERS_HPP
#define NDN_ENCODING_BLOCK_HELPERS_HPP

#include "block.hpp"
#include "encoding-buffer.hpp"

namespace ndn {

inline Block
nonNegativeIntegerBlock(uint32_t type, uint64_t value)
{
  EncodingEstimator estimator;
  size_t totalLength = prependNonNegativeIntegerBlock(estimator, type, value);

  EncodingBuffer encoder(totalLength, 0);
  prependNonNegativeIntegerBlock(encoder, type, value);

  return encoder.block();
}

inline uint64_t
readNonNegativeInteger(const Block& block)
{
  Buffer::const_iterator begin = block.value_begin();
  return Tlv::readNonNegativeInteger(block.value_size(), begin, block.value_end());
}

inline Block
booleanBlock(uint32_t type)
{
  EncodingEstimator estimator;
  size_t totalLength = prependBooleanBlock(estimator, type);

  EncodingBuffer encoder(totalLength, 0);
  prependBooleanBlock(encoder, type);

  return encoder.block();
}

inline Block
dataBlock(uint32_t type, const uint8_t* data, size_t dataSize)
{
  EncodingEstimator estimator;
  size_t totalLength = prependByteArrayBlock(estimator, type, data, dataSize);

  EncodingBuffer encoder(totalLength, 0);
  prependByteArrayBlock(encoder, type, data, dataSize);

  return encoder.block();
}

inline Block
dataBlock(uint32_t type, const char* data, size_t dataSize)
{
  return dataBlock(type, reinterpret_cast<const uint8_t*>(data), dataSize);
}

// template<class InputIterator>
// inline Block
// dataBlock(uint32_t type, InputIterator first, InputIterator last)
// {
//   size_t dataSize = 0;
//   for (InputIterator i = first; i != last; i++)
//     ++dataSize;

//   OBufferStream os;
//   Tlv::writeVarNumber(os, type);
//   Tlv::writeVarNumber(os, dataSize);
//   std::copy(first, last, std::ostream_iterator<uint8_t>(os));

//   return Block(os.buf());
// }

} // namespace ndn

#endif // NDN_ENCODING_BLOCK_HELPERS_HPP