include/ndn-cpp/encoding/block-helpers.hpp

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/*
 * Copyright (c) 2013, Regents of the University of California
 *
 * BSD license, See the LICENSE file for more information
 *
 * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
 */

#ifndef NDN_BLOCK_HELPERS_HPP
#define NDN_BLOCK_HELPERS_HPP

#include "block.hpp"

namespace ndn {

inline Block
nonNegativeIntegerBlock(uint32_t type, uint64_t value)
{
  OBufferStream os;
  Tlv::writeVarNumber(os, type);
  Tlv::writeVarNumber(os, Tlv::sizeOfNonNegativeInteger(value));
  Tlv::writeNonNegativeInteger(os, value);
  return Block(os.buf());
}

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)
{
  OBufferStream os;
  Tlv::writeVarNumber(os, type);
  Tlv::writeVarNumber(os, 0);
  return Block(os.buf());
}

inline Block
dataBlock(uint32_t type, const char *data, size_t dataSize)
{
  OBufferStream os;
  Tlv::writeVarNumber(os, type);
  Tlv::writeVarNumber(os, dataSize);
  os.write(data, dataSize);

  return Block(os.buf());
}

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

} // namespace ndn

#endif // NDN_BLOCK_HELPERS_HPP