/*
 * 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/bytearrayinputstream.h>
#include <log4cxx/helpers/exception.h>
#include <log4cxx/helpers/bytebuffer.h>
#include <apr_file_io.h>
#include <log4cxx/helpers/transcoder.h>
#include <algorithm>

using namespace log4cxx;
using namespace log4cxx::helpers;
using namespace std;

IMPLEMENT_LOG4CXX_OBJECT(ByteArrayInputStream)

ByteArrayInputStream::ByteArrayInputStream(const std::vector<unsigned char>& bytes) :
	buf(bytes), pos(0)
{
}


ByteArrayInputStream::~ByteArrayInputStream()
{
}


void ByteArrayInputStream::close()
{
}


int ByteArrayInputStream::read(ByteBuffer& dst)
{
	if (pos >= buf.size())
	{
		return -1;
	}
	else
	{
		size_t bytesCopied = min(dst.remaining(), buf.size() - pos);
		memcpy(dst.current(), &buf[pos], bytesCopied);
		pos += bytesCopied;
		dst.position(dst.position() + bytesCopied);
		return (int)bytesCopied;
	}
}