instructionconstants.java

该开源工具主要用于class文件的操作

package org.apache.bcel.generic;

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache BCEL" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache",
 *    "Apache BCEL", nor may "Apache" appear in their name, without
 *    prior written permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import org.apache.bcel.Constants;

/** 
 * This interface contains shareable instruction objects.
 *
 * In order to save memory you can use some instructions multiply,
 * since they have an immutable state and are directly derived from
 * Instruction.  I.e. they have no instance fields that could be
 * changed. Since some of these instructions like ICONST_0 occur
 * very frequently this can save a lot of time and space. This
 * feature is an adaptation of the FlyWeight design pattern, we
 * just use an array instead of a factory.
 *
 * The Instructions can also accessed directly under their names, so
 * it's possible to write il.append(Instruction.ICONST_0);
 *
 * @version $Id: InstructionConstants.java,v 1.1.1.1 2001/10/29 20:00:18 jvanzyl Exp $
 * @author  <A HREF="mailto:[e-mail]">M. Dahm</A>
 */
public interface InstructionConstants {
  /** Predefined instruction objects
   */
  public static final Instruction           NOP          = new NOP();
  public static final Instruction           ACONST_NULL  = new ACONST_NULL();
  public static final Instruction           ICONST_M1    = new ICONST(-1);
  public static final Instruction           ICONST_0     = new ICONST(0);
  public static final Instruction           ICONST_1     = new ICONST(1);
  public static final Instruction           ICONST_2     = new ICONST(2);
  public static final Instruction           ICONST_3     = new ICONST(3);
  public static final Instruction           ICONST_4     = new ICONST(4);
  public static final Instruction           ICONST_5     = new ICONST(5);
  public static final Instruction           LCONST_0     = new LCONST(0);
  public static final Instruction           LCONST_1     = new LCONST(1);
  public static final Instruction           FCONST_0     = new FCONST(0);
  public static final Instruction           FCONST_1     = new FCONST(1);
  public static final Instruction           FCONST_2     = new FCONST(2);
  public static final Instruction           DCONST_0     = new DCONST(0);
  public static final Instruction           DCONST_1     = new DCONST(1);
  public static final ArrayInstruction      IALOAD       = new IALOAD();
  public static final ArrayInstruction      LALOAD       = new LALOAD();
  public static final ArrayInstruction      FALOAD       = new FALOAD();
  public static final ArrayInstruction      DALOAD       = new DALOAD();
  public static final ArrayInstruction      AALOAD       = new AALOAD();
  public static final ArrayInstruction      BALOAD       = new BALOAD();
  public static final ArrayInstruction      CALOAD       = new CALOAD();
  public static final ArrayInstruction      SALOAD       = new SALOAD();
  public static final ArrayInstruction      IASTORE      = new IASTORE();
  public static final ArrayInstruction      LASTORE      = new LASTORE();
  public static final ArrayInstruction      FASTORE      = new FASTORE();
  public static final ArrayInstruction      DASTORE      = new DASTORE();
  public static final ArrayInstruction      AASTORE      = new AASTORE();
  public static final ArrayInstruction      BASTORE      = new BASTORE();
  public static final ArrayInstruction      CASTORE      = new CASTORE();
  public static final ArrayInstruction      SASTORE      = new SASTORE();
  public static final StackInstruction      POP          = new POP();
  public static final StackInstruction      POP2         = new POP2();
  public static final StackInstruction      DUP          = new DUP();
  public static final StackInstruction      DUP_X1       = new DUP_X1();
  public static final StackInstruction      DUP_X2       = new DUP_X2();
  public static final StackInstruction      DUP2         = new DUP2();
  public static final StackInstruction      DUP2_X1      = new DUP2_X1();
  public static final StackInstruction      DUP2_X2      = new DUP2_X2();
  public static final StackInstruction      SWAP         = new SWAP();
  public static final ArithmeticInstruction IADD         = new IADD();
  public static final ArithmeticInstruction LADD         = new LADD();
  public static final ArithmeticInstruction FADD         = new FADD();
  public static final ArithmeticInstruction DADD         = new DADD();
  public static final ArithmeticInstruction ISUB         = new ISUB();
  public static final ArithmeticInstruction LSUB         = new LSUB();
  public static final ArithmeticInstruction FSUB         = new FSUB();
  public static final ArithmeticInstruction DSUB         = new DSUB();
  public static final ArithmeticInstruction IMUL         = new IMUL();
  public static final ArithmeticInstruction LMUL         = new LMUL();
  public static final ArithmeticInstruction FMUL         = new FMUL();
  public static final ArithmeticInstruction DMUL         = new DMUL();
  public static final ArithmeticInstruction IDIV         = new IDIV();
  public static final ArithmeticInstruction LDIV         = new LDIV();
  public static final ArithmeticInstruction FDIV         = new FDIV();
  public static final ArithmeticInstruction DDIV         = new DDIV();
  public static final ArithmeticInstruction IREM         = new IREM();
  public static final ArithmeticInstruction LREM         = new LREM();
  public static final ArithmeticInstruction FREM         = new FREM();
  public static final ArithmeticInstruction DREM         = new DREM();
  public static final ArithmeticInstruction INEG         = new INEG();
  public static final ArithmeticInstruction LNEG         = new LNEG();
  public static final ArithmeticInstruction FNEG         = new FNEG();
  public static final ArithmeticInstruction DNEG         = new DNEG();
  public static final ArithmeticInstruction ISHL         = new ISHL();
  public static final ArithmeticInstruction LSHL         = new LSHL();
  public static final ArithmeticInstruction ISHR         = new ISHR();
  public static final ArithmeticInstruction LSHR         = new LSHR();
  public static final ArithmeticInstruction IUSHR        = new IUSHR();
  public static final ArithmeticInstruction LUSHR        = new LUSHR();
  public static final ArithmeticInstruction IAND         = new IAND();
  public static final ArithmeticInstruction LAND         = new LAND();
  public static final ArithmeticInstruction IOR          = new IOR();
  public static final ArithmeticInstruction LOR          = new LOR();
  public static final ArithmeticInstruction IXOR         = new IXOR();
  public static final ArithmeticInstruction LXOR         = new LXOR();
  public static final ConversionInstruction I2L          = new I2L();
  public static final ConversionInstruction I2F          = new I2F();
  public static final ConversionInstruction I2D          = new I2D();
  public static final ConversionInstruction L2I          = new L2I();
  public static final ConversionInstruction L2F          = new L2F();
  public static final ConversionInstruction L2D          = new L2D();
  public static final ConversionInstruction F2I          = new F2I();
  public static final ConversionInstruction F2L          = new F2L();
  public static final ConversionInstruction F2D          = new F2D();