/* Software Name : AsmDex
* Version : 1.0
*
* Copyright © 2012 France Télécom
* 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. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.ow2.asmdex.tree;
import java.util.Map;
import org.ow2.asmdex.MethodVisitor;
/**
* A node that represents a jump instruction. A jump instruction is an
* instruction that may jump to another instruction.
*
* @author Eric Bruneton
* @author Julien Névo (adaptation to AsmDex).
*/
public class JumpInsnNode extends AbstractInsnNode {
/**
* The operand of this instruction. This operand is a label that designates
* the instruction to which this instruction may jump.
*/
public LabelNode label;
/**
* Register A. Ignored for unconditional jump.
*/
public int registerA;
/**
* Register B. Ignored for unconditional jump or zero tests (IF-EQZ, IF-NEZ...).
*/
public int registerB;
/**
* Constructs a new {@link JumpInsnNode}.
*
* @param opcode the opcode of the type instruction to be constructed. This
* opcode is either GOTO, IF-EQ, IF-NE, IF-LT, IF-GE, IF-GT, IF-LE,
* or IF-EQZ, IF-NEZ, IF-LTZ, IF-GEZ, IF-GTZ, IF-LEZ.
* @param label the operand of the instruction to be constructed. This
* operand is a label that designates the instruction to which the
* jump instruction may jump.
* @param registerA the register A. Ignored for unconditional jump.
* @param registerB the register B. Ignored for unconditional jump or zero
* tests (IF-EQZ, IF-NEZ...).
*/
public JumpInsnNode(final int opcode, final LabelNode label, final int registerA, final int registerB) {
super(opcode);
this.label = label;
this.registerA = registerA;
this.registerB = registerB;
}
/**
* Sets the opcode of this instruction.
*
* @param opcode the new instruction opcode. This opcode is either GOTO,
* IF-EQ, IF-NE, IF-LT, IF-GE, IF-GT, IF-LE, IF-EQZ, IF-NEZ,
* IF-LTZ, IF-GEZ, IF-GTZ, IF-LEZ.
*/
public void setOpcode(final int opcode) {
this.opcode = opcode;
}
@Override
public int getType() {
return JUMP_INSN;
}
@Override
public void accept(final MethodVisitor mv) {
mv.visitJumpInsn(opcode, label.getLabel(), registerA, registerB);
}
@Override
public AbstractInsnNode clone(final Map<LabelNode, LabelNode> labels) {
return new JumpInsnNode(opcode, clone(label, labels), registerA, registerB);
}
}