/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <log4cxx/logstring.h>

#include <log4cxx/helpers/inputstreamreader.h>

#include <log4cxx/helpers/exception.h>

#include <log4cxx/helpers/pool.h>

#include <log4cxx/helpers/bytebuffer.h>

#include <cstdio>

#include <cstring>

using namespace LOG4CXX_NS;

using namespace LOG4CXX_NS::helpers;

IMPLEMENT_LOG4CXX_OBJECT(InputStreamReader)

struct InputStreamReader::InputStreamReaderPrivate{

  InputStreamReaderPrivate(const InputStreamPtr& in1) :

    in(in1), dec(CharsetDecoder::getDefaultDecoder()){}

  InputStreamReaderPrivate(const InputStreamPtr& in1, const CharsetDecoderPtr& dec1) :

    in(in1), dec(dec1) {}

  InputStreamPtr in;

  CharsetDecoderPtr dec;

};

InputStreamReader::InputStreamReader(const InputStreamPtr& in1)

  : m_priv(std::make_unique<InputStreamReaderPrivate>(in1))

{

  if (in1 == 0)

  {

    throw NullPointerException(LOG4CXX_STR("in parameter may not be null."));

  }

}

InputStreamReader::InputStreamReader(const InputStreamPtr& in1, const CharsetDecoderPtr& dec1)

  : m_priv(std::make_unique<InputStreamReaderPrivate>(in1, dec1))

{

  if (in1 == 0)

  {

    throw NullPointerException(LOG4CXX_STR("in parameter may not be null."));

  }

  if (dec1 == 0)

  {

    throw NullPointerException(LOG4CXX_STR("dec parameter may not be null."));

  }

}

InputStreamReader::~InputStreamReader()

{

}

void InputStreamReader::close(Pool& )

{

  m_priv->in->close();

}

LogString InputStreamReader::read(Pool& p)

{

  const size_t BUFSIZE = 4096;

  ByteBuffer buf(p.pstralloc(BUFSIZE), BUFSIZE);

  LogString output;

  // read whole file

  while (m_priv->in->read(buf) >= 0)

  {

    buf.flip();

    log4cxx_status_t stat = m_priv->dec->decode(buf, output);

    if (stat != 0)

    {

      throw IOException(LOG4CXX_STR("decode"), stat);

    }

    if (buf.remaining() > 0)

    {

      memmove(buf.data(), buf.current(), buf.remaining());

      buf.limit(buf.remaining());

    }

    else

    {

      buf.clear();

    }

  }

  return output;

}