/*
* 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.png;
public final class ChunkValidatorIDAT extends ChunkValidator {
public static final class Spec {
public static final String section = "4.1.3";
static final byte[] header =
ChunkValidatorIDAT.class.getName().substring(ChunkValidatorIDAT.class.getName().length() - ChunkValidator.Spec.Props.typeSize,
ChunkValidatorIDAT.class.getName().length()).getBytes(Utils.getCharset());
}
void validate() throws PngValidationException {
// call before chunk count is incremented
validateAllConsecutive();
// when checking for multiples
validateMultipleAllowed(Spec.header);
}
void validateAllConsecutive() throws PngValidationException {
ChunkState ce = png.getChunkState(Spec.header);
if (!Utils.compareEqual(png.getLastChunkType(), Spec.header, ChunkValidator.Spec.Props.typeSize) && ce.getCount() > 0)
png.logMsg(PngValidator.MsgCode.PNG01E018, Spec.section);
}
}