text: /* The copyright in this software is being made available under the BSD
   * Licence, included below.  This software may be subject to other third
   * party and contributor rights, including patent rights, and no such
   * rights are granted under this licence.
   *
   * Copyright (c) 2017-2018, ISO/IEC
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * * Redistributions of source code must retain the above copyright
   *   notice, this list of conditions and the following disclaimer.
   *
   * * Redistributions in binary form must reproduce the above copyright
   *   notice, this list of conditions and the following disclaimer in the
   *   documentation and/or other materials provided with the distribution.
   *
   * * Neither the name of the ISO/IEC nor the names of its contributors
   *   may be used to endorse or promote products derived from this
   *   software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include "io_tlv.h"
  
  #include <cstdint>
  
  namespace pcc {
  
  //============================================================================
  
  std::ostream&
  writeTlv(const PayloadBuffer& buf, std::ostream& os)
  {
    uint32_t length = uint32_t(buf.size());
  
    os.put(char(buf.type));
    os.put(char(length >> 24));
    os.put(char(length >> 16));
    os.put(char(length >> 8));
    os.put(char(length >> 0));
  
    os.write(buf.data(), length);
    return os;
  }
  
  //============================================================================
  
  std::istream&
  readTlv(std::istream& is, PayloadBuffer* buf)
  {
    buf->resize(0);
    buf->type = PayloadType(static_cast<unsigned>(is.get()));
  
    uint32_t length = 0;
    length = (length << 8) | static_cast<unsigned>(is.get());
    length = (length << 8) | static_cast<unsigned>(is.get());
    length = (length << 8) | static_cast<unsigned>(is.get());
    length = (length << 8) | static_cast<unsigned>(is.get());
  
    if (!is)
      return is;
  
    buf->resize(length);
    is.read(buf->data(), length);
    return is;
  }
  
  //============================================================================
  
  }  // namespace pcc