package railo.transformer.bytecode.statement;
import org.objectweb.asm.Label;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.commons.GeneratorAdapter;
import railo.transformer.bytecode.Body;
import railo.transformer.bytecode.BytecodeContext;
import railo.transformer.bytecode.BytecodeException;
import railo.transformer.bytecode.Position;
import railo.transformer.bytecode.cast.CastBoolean;
import railo.transformer.bytecode.expression.ExprBoolean;
import railo.transformer.bytecode.expression.Expression;
import railo.transformer.bytecode.literal.LitBoolean;
public final class While extends StatementBaseNoFinal implements FlowControlBreak,FlowControlContinue,HasBody {
private ExprBoolean expr;
private Body body;
private Label begin = new Label();
private Label end = new Label();
private String label;
/**
* Constructor of the class
* @param expr
* @param body
* @param line
*/
public While(Expression expr,Body body,Position start,Position end, String label) {
super(start,end);
this.expr=CastBoolean.toExprBoolean(expr);
this.body=body;
body.setParent(this);
this.label=label;
}
/**
* Constructor of the class
* @param b
* @param body
* @param line
*/
public While(boolean b, Body body,Position start,Position end, String label) {
this(LitBoolean.toExprBoolean(b),body,start, end, label);
}
@Override
public void _writeOut(BytecodeContext bc) throws BytecodeException {
GeneratorAdapter adapter = bc.getAdapter();
adapter.visitLabel(begin);
expr.writeOut(bc, Expression.MODE_VALUE);
adapter.ifZCmp(Opcodes.IFEQ, end);
body.writeOut(bc);
adapter.visitJumpInsn(Opcodes.GOTO, begin);
adapter.visitLabel(end);
}
@Override
public Label getBreakLabel() {
return end;
}
@Override
public Label getContinueLabel() {
return begin;
}
@Override
public Body getBody() {
return body;
}
@Override
public String getLabel() {
return label;
}
}