blob: 539506e553cb5e14c9da65c1c83c58fb55b126a4 [file] [log] [blame]
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
* Copyright (c) 2013-2016 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 "stream-source.hpp"
#include <vector>
namespace ndn {
namespace security {
namespace transform {
const std::size_t StreamSource::DEFAULT_BUFFER_LEN = 1024;
StreamSource::StreamSource(std::istream& is, size_t bufferSize)
: Source()
, m_is(is)
, m_bufferSize(bufferSize)
{
BOOST_ASSERT(bufferSize > 0);
}
void
StreamSource::doPump()
{
BOOST_ASSERT(m_next != nullptr);
std::vector<uint8_t> buffer(m_bufferSize);
size_t dataOffset = 0;
size_t dataLen = 0;
while (dataLen > 0 || !m_is.eof()) {
if (dataLen > 0) {
// we have some leftover, handle them first
size_t nBytesWritten = m_next->write(&buffer[dataOffset], dataLen);
dataOffset += nBytesWritten;
dataLen -= nBytesWritten;
}
else if (!m_is) {
BOOST_THROW_EXCEPTION(Error(getIndex(), "Input stream in bad state"));
}
else if (m_is.good()) {
m_is.read(reinterpret_cast<char*>(&buffer.front()), buffer.size());
dataOffset = 0;
dataLen = m_is.gcount();
}
}
m_next->end();
}
} // namespace transform
} // namespace security
} // namespace ndn