/*
* Copyright 2016 Skynav, Inc. All rights reserved.
* Portions Copyright 2009 Extensible Formatting Systems, Inc (XFSI).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY SKYNAV, INC. AND ITS 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 SKYNAV, INC. OR ITS 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.
*/
package com.xfsi.xav.validation.images.jpeg;
import java.io.EOFException;
import java.io.IOException;
import com.xfsi.xav.validation.images.jpeg.JpegValidator.MsgCode;
import com.xfsi.xav.validation.util.AbstractLoggingValidator;
/**
* validates DNL segment
*/
class SegmentParserFFDC extends SegmentParser {
boolean validate(JpegInputStream jis, JpegState js, AbstractLoggingValidator mh) throws EOFException
{
try
{
mh.logResult(JpegValidator.MsgCode.JPG01I027, js.getCurrentCode());
js.incrementDnlSegmentCount();
// DNL segment only allowed once after first SOS segment
if (!js.getDnlSegmentAllowed())
mh.logResult(JpegValidator.MsgCode.JPG01E011, js.getSegmentCount(), jis.getTotalBytesRead());
int expectedLength = 4; // bytes
int actualLength = jis.readShort() & 0xffff;
if (actualLength != expectedLength)
mh.logResult(JpegValidator.MsgCode.JPG01E045, actualLength, expectedLength);
if (jis.readShort() == 0)
mh.logResult(JpegValidator.MsgCode.JPG01E046);
js.disallowDnlSegment();
}
catch (EOFException e)
{
mh.logResult(JpegValidator.MsgCode.JPG01F003, js.getCurrentCode(), js.getSegmentCount(), jis.getTotalBytesRead());
throw e;
}
catch (IOException e)
{
assert(false) : mh.msgFormatterNV(MsgCode.JPG01X003.toString(), Thread.currentThread().getStackTrace()[2].getMethodName(), e.getMessage());
}
return true;
}
}