package jvm.command.item.impl;
import jvm.classfile.ClassFile;
import jvm.classfile.ConstantPool;
import jvm.classfile.constant.item.impl.FieldRefInfo;
import jvm.command.CommandIterator;
import jvm.command.item.TwoOperandCmd;
import jvm.engine.ExecutionResult;
import jvm.engine.JavaObject;
import jvm.engine.StackFrame;
import jvm.util.NumberUtils;
public class IfNonNullCmd extends TwoOperandCmd {
public IfNonNullCmd(ClassFile clzFile, String opCode, CommandIterator iterator) {
super(clzFile, opCode, iterator);
}
@Override
public String toString(ConstantPool pool) {
return super.getOperandAsField(pool);
}
@Override
public void execute(StackFrame frame, ExecutionResult result) {
JavaObject obj = frame.getOperandStack().pop();
if (obj != null) {
int nextCmdOffset = (getOperand1() << 8) | getOperand2();
nextCmdOffset = NumberUtils.toSignedInt(nextCmdOffset, 16);
nextCmdOffset += getOffset();
result.setNextCmdOffset(nextCmdOffset);
result.setNextAction(ExecutionResult.JUMP);
}
}
}