package org.jscsi.target.scsi.readCapacity;

 import java.nio.ByteBuffer;

 import org.jscsi.target.util.ReadWrite;

 /**

  * <code>READ CAPACITY (10)</code> parameter data is sent in response to a successful <code> READ CAPACITY (10)</code>

  * SCSI command.

  * 

  * @author Andreas Ergenzinger

  */

 public final class ReadCapacity10ParameterData extends ReadCapacityParameterData {

     /**

      * Specifies the limit to the {@link ReadCapacityParameterData#returnedLogicalBlockAddress} field for READ CAPACITY

      * (10) parameter data.

      * <p>

      * If the value of the RETURNED LOGICAL BLOCK ADDRESS field does not fit completely into the available four bytes,

      * then this value will be inserted instead.

      */

     private static final long MAX_RETURNED_LOGICAL_BLOCK_ADDRESS = 0xffffffffL;

     /**

      * The length in bytes of serialized READ CAPACITY (16) parameter data.

      */

     private static final int SIZE = 8;

     public ReadCapacity10ParameterData (final long returnedLogicalBlockAddress, final int logicalBlockLengthInBytes) {

         super(returnedLogicalBlockAddress, logicalBlockLengthInBytes);

     }

     public void serialize (ByteBuffer byteBuffer, int index) {

         // returned logical block address

         // trim to size, and prevent overflow (initiator has to use READ

         // CAPACITY (16))

         final int rlba = (int) Math.min(returnedLogicalBlockAddress, MAX_RETURNED_LOGICAL_BLOCK_ADDRESS);

         ReadWrite.writeInt(rlba, byteBuffer, index);

         // logical block length in bytes

         ReadWrite.writeInt(logicalBlockLengthInBytes, byteBuffer, index + 4);

     }

     public int size () {

         return SIZE;

     }

 }