jcifs.internal.smb1.com.LockingAndXRange Maven / Gradle / Ivy

/*
 * © 2017 AgNO3 Gmbh & Co. KG
 * 
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.smb1.com;


import jcifs.Decodable;
import jcifs.Encodable;
import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.util.SMBUtil;


/**
 * @author mbechler
 *
 */
public class LockingAndXRange implements Encodable, Decodable {

    private final boolean largeFile;
    private int pid;
    private long byteOffset;
    private long lengthInBytes;


    /**
     * @param largeFile
     * 
     */
    public LockingAndXRange ( boolean largeFile ) {
        this.largeFile = largeFile;
    }


    /**
     * 
     * @return pid
     */
    public int getPid () {
        return this.pid;
    }


    /**
     * 
     * @return start byte offset
     */
    public long getByteOffset () {
        return this.byteOffset;
    }


    /**
     * 
     * @return byte length
     */
    public long getLengthInBytes () {
        return this.lengthInBytes;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.Decodable#decode(byte[], int, int)
     */
    @Override
    public int decode ( byte[] buffer, int bufferIndex, int len ) throws SMBProtocolDecodingException {
        if ( this.largeFile ) {
            this.pid = SMBUtil.readInt2(buffer, bufferIndex);
            int boHigh = SMBUtil.readInt4(buffer, bufferIndex + 4);
            int boLow = SMBUtil.readInt4(buffer, bufferIndex + 8);

            this.byteOffset = ( boHigh << 32 ) | boLow;

            int lHigh = SMBUtil.readInt4(buffer, bufferIndex + 12);
            int lLow = SMBUtil.readInt4(buffer, bufferIndex + 16);

            this.lengthInBytes = ( lHigh << 32 ) | lLow;
            return 20;
        }
        this.pid = SMBUtil.readInt2(buffer, bufferIndex);
        this.byteOffset = SMBUtil.readInt4(buffer, bufferIndex + 2);
        this.lengthInBytes = SMBUtil.readInt4(buffer, bufferIndex + 6);
        return 10;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.Encodable#encode(byte[], int)
     */
    @Override
    public int encode ( byte[] dst, int dstIndex ) {
        if ( this.largeFile ) {
            SMBUtil.writeInt2(this.pid, dst, dstIndex);
            SMBUtil.writeInt4(this.byteOffset >> 32, dst, dstIndex + 4);
            SMBUtil.writeInt4(this.byteOffset & 0xFFFFFFFF, dst, dstIndex + 8);
            SMBUtil.writeInt4(this.lengthInBytes >> 32, dst, dstIndex + 12);
            SMBUtil.writeInt4(this.lengthInBytes & 0xFFFFFFFF, dst, dstIndex + 16);
            return 20;
        }
        SMBUtil.writeInt2(this.pid, dst, dstIndex);
        SMBUtil.writeInt4(this.byteOffset, dst, dstIndex + 2);
        SMBUtil.writeInt4(this.lengthInBytes, dst, dstIndex + 6);
        return 10;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.Encodable#size()
     */
    @Override
    public int size () {
        return this.largeFile ? 20 : 10;
    }

}