com.github.stephenc.javaisotools.udflib.structures.PartitionDescriptor Maven / Gradle / Ivy

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/*
 * Copyright (c) 2010. Stephen Connolly.
 * Copyright (c) 2006. Björn Stickler .
 *
 * This 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 2.1 of the License, or (at your option) any later version.
 *
 * This 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 a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

package com.github.stephenc.javaisotools.udflib.structures;

import java.io.IOException;
import java.io.RandomAccessFile;

import com.github.stephenc.javaisotools.udflib.tools.BinaryTools;

public class PartitionDescriptor extends VolumeDescriptorSequenceItem {

    public int PartitionFlags;                        // Uint16
    public int PartitionNumber;                    // Uint16
    public EntityID PartitionContents;                    // struct EntityID

    //public byte						PartitionContentsUse[];				// byte[128] 		== PartitionHeaderDescriptor
    public PartitionHeaderDescriptor PartitionContentsUse;

    public long AccessType;                            // Uint32
    public long PartitonStartingLocation;            // Uint32
    public long PartitionLength;                    // Uint32
    public EntityID ImplementationIdentifier;            // struct EntityID
    public byte ImplementationUse[];                // byte[128]
    public byte Reserved[];                            // byte[156]

    public PartitionDescriptor() {
        DescriptorTag = new Tag();
        DescriptorTag.TagIdentifier = 5;

        PartitionContents = new EntityID();

        //PartitionContentsUse = new byte[128];
        PartitionContentsUse = new PartitionHeaderDescriptor();

        ImplementationIdentifier = new EntityID();
        ImplementationUse = new byte[128];
        Reserved = new byte[156];
    }

    public void read(RandomAccessFile myRandomAccessFile)
            throws IOException {
        DescriptorTag = new Tag();
        DescriptorTag.read(myRandomAccessFile);

        VolumeDescriptorSequenceNumber = BinaryTools.readUInt32AsLong(myRandomAccessFile);

        PartitionFlags = BinaryTools.readUInt16AsInt(myRandomAccessFile);
        PartitionNumber = BinaryTools.readUInt16AsInt(myRandomAccessFile);

        PartitionContents = new EntityID();
        PartitionContents.read(myRandomAccessFile);

        //PartitionContentsUse = new byte[128];
        //myRandomAccessFile.read( PartitionContentsUse );
        PartitionContentsUse = new PartitionHeaderDescriptor();
        PartitionContentsUse.read(myRandomAccessFile);

        AccessType = BinaryTools.readUInt32AsLong(myRandomAccessFile);
        PartitonStartingLocation = BinaryTools.readUInt32AsLong(myRandomAccessFile);
        PartitionLength = BinaryTools.readUInt32AsLong(myRandomAccessFile);

        ImplementationIdentifier = new EntityID();
        ImplementationIdentifier.read(myRandomAccessFile);

        ImplementationUse = new byte[128];
        myRandomAccessFile.read(ImplementationUse);

        Reserved = new byte[156];
        myRandomAccessFile.read(Reserved);
    }

    public byte[] getBytesWithoutDescriptorTag() {
        byte PartitionContentsBytes[] = PartitionContents.getBytes();
        byte ImplementationIdentifierBytes[] = ImplementationIdentifier.getBytes();
        byte PartitionContentsUseBytes[] = PartitionContentsUse.getBytes();

        byte rawBytes[] = new byte[304
                + PartitionContentsBytes.length
                + ImplementationIdentifierBytes.length
                + PartitionContentsUseBytes.length];

        int pos = 0;

        pos = BinaryTools.getUInt32BytesFromLong(VolumeDescriptorSequenceNumber, rawBytes, pos);
        pos = BinaryTools.getUInt16BytesFromInt(PartitionFlags, rawBytes, pos);
        pos = BinaryTools.getUInt16BytesFromInt(PartitionNumber, rawBytes, pos);

        System.arraycopy(PartitionContentsBytes, 0, rawBytes, pos, PartitionContentsBytes.length);
        pos += PartitionContentsBytes.length;

        //System.arraycopy( PartitionContentsUse, 0, rawBytes, pos, PartitionContentsUse.length );
        //pos += PartitionContentsUse.length;
        System.arraycopy(PartitionContentsUseBytes, 0, rawBytes, pos, PartitionContentsUseBytes.length);
        pos += PartitionContentsUseBytes.length;

        pos = BinaryTools.getUInt32BytesFromLong(AccessType, rawBytes, pos);
        pos = BinaryTools.getUInt32BytesFromLong(PartitonStartingLocation, rawBytes, pos);
        pos = BinaryTools.getUInt32BytesFromLong(PartitionLength, rawBytes, pos);

        System.arraycopy(ImplementationIdentifierBytes, 0, rawBytes, pos, ImplementationIdentifierBytes.length);
        pos += ImplementationIdentifierBytes.length;

        System.arraycopy(ImplementationUse, 0, rawBytes, pos, ImplementationUse.length);
        pos += ImplementationUse.length;

        System.arraycopy(Reserved, 0, rawBytes, pos, Reserved.length);
        pos += Reserved.length;

        return rawBytes;
    }

}