MemoryElement.java

/* MemoryElement.java
 *
 * This class models a 64-bit memory location.
 * (c) 2006 Salvatore Scellato
 *
 * This file is part of the EduMIPS64 project, and is released under the GNU
 * General Public License.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.edumips64.core;

import org.edumips64.utils.*;
/** This class models a 64-bit memory location with a given address.
 * @author Salvatore Scellato
 * */
public class MemoryElement extends BitSet64 {
  private int address;
  private String comment;
  private String label;
  private String code;

  /** Creates a new MemoryElement with given address.
   * @param address address of the MemoryElement
   */
  public MemoryElement(int address) {
    super();
    this.address = address;
    comment = "";
    label = "";
    code = "";
  }

  /** Returns the address of this MemoryElement
   * @return address of the MemoryElement
   */
  public int getAddress() {
    return address;
  }

  /** Returns the comment related to this MemoryElement
   * @return comment of this MemoryElement
   */
  public String getComment() {
    return comment;
  }

  /** Sets the comment related to this MemoryElement
   * @param comment brief description of this MemoryElement
   */
  public void setComment(String comment) {
    this.comment = comment;
  }

  /** Returns the label of this MemoryElement
   * @return label of the MemoryElement
   */
  public String getLabel() {
    return label;
  }

  /** Sets the label related to this MemoryElement
   * @param label label of this MemoryElement
   */
  public void setLabel(String label) {
    this.label = label;
  }


  /** Returns the code of this MemoryElement
   * @return code of the MemoryElement
   */
  public String getCode() {
    return code;
  }

  /** Sets the code related to this MemoryElement
   * @param code code of this MemoryElement
   */

  public void setCode(String code) {
    this.code = code;
  }

  /** Returns the signed numeric decimal value stored in the 64 bits of this MemoryElement: basically
   * this method performs a conversion from binary value to decimal value.
   * @return signed numerical value stored in this MemoryElement.
   */
  public long getValue() {
    try {
      return Converter.binToLong(this.getBinString(), false);
    } catch (IrregularStringOfBitsException e) {
      System.err.println("Errore in un registro");
      this.reset(false);  //azzeriamo il registro
      return 0;
    }
  }

  /** Returns a string represention of this MemoryElement, formatted with the address and
   * the value (in hexadecimal digits).
   * That is, if the address is 16 and the value stored within is 256 the string will be
   * <code>"ADDRESS 10, VALUE 0000000000000100"</code>.
   *
   * @return representation of this MemoryElement
   */
  public String toString() {
    try {
      String s = "ADDRESS " + Converter.binToHex(Converter.positiveIntToBin(32, this.getAddress()));
      s += ", VALUE " + Converter.binToHex(this.getBinString());
      s += ", LABEL  " + this.getLabel();
      s += ", CODE " + this.getCode();
      s += ", COMMENT " + this.getComment();
      return s;
    } catch (IrregularStringOfBitsException e) {
      e.printStackTrace();

    }

    return "ERRORE";
  }
}