jas.GenericAttr Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jasmin Show documentation

Java Assembler Interface for the Soot framework

There is a newer version: 3.0.3

/**
 * This is an opaque attribute that lets you add an uninterpreted
 * stream of bytes into an attribute in a class file. This can be
 * used (for instance) to embed versioning or signatures into the
 * class file or method.
 *
 * @author $Author: fqian $
 * @version $Revision: 1.1 $
 */
package jas;

import java.io.*;

public class GenericAttr
{
  CP attr_name;
  byte data[];

  /**
   * Make up a new attribute
   * @param name Name to be associated with the attribute
   * @data stream of bytes to be placed with the attribute
   * @see ClassEnv#addGenericAttr
   * @see CodeAttr#addGenericAttr
   */
  public GenericAttr(String name, byte data[])
  {
    attr_name = new AsciiCP(name);
    this.data = data;
  }
  /**
   * Make up a new attribute
   * @param name CP to be defined as the name of the attribute
   * @data stream of bytes to be placed with the attribute
   * @see ClassEnv#addGenericAttr
   * @see CodeAttr#addGenericAttr
   */
  public GenericAttr(CP name, byte data[])
  {
    attr_name = name;
    this.data = data;
  }

  void resolve(ClassEnv e)
  { e.addCPItem(attr_name); }

  int size()
  { return (2 + 4 + data.length); }

  void write(ClassEnv e, DataOutputStream out)
    throws IOException, jasError
  {
    out.writeShort(e.getCPIndex(attr_name));
    out.writeInt(data.length);
    out.write(data);
  }
}