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.expression.Expression;
import railo.transformer.bytecode.literal.LitBoolean;
import railo.transformer.bytecode.util.ASMUtil;
import railo.transformer.bytecode.util.ExpressionUtil;
public final class For extends StatementBaseNoFinal implements FlowControlBreak,FlowControlContinue,HasBody {
private Expression init;
private Expression condition;
private Expression update;
private Body body;
//private static final int I=1;
Label beforeUpdate = new Label();
Label end = new Label();
private String label;
/**
* Constructor of the class
* @param init
* @param condition
* @param update
* @param body
* @param line
*/
public For(Expression init,Expression condition,Expression update,Body body,Position start, Position end, String label) {
super(start,end);
this.init=init;
this.condition=condition;
this.update=update;
this.body=body;
this.label=label;
body.setParent(this);
}
@Override
public void _writeOut(BytecodeContext bc) throws BytecodeException {
GeneratorAdapter adapter = bc.getAdapter();
Label beforeInit = new Label();
Label afterInit = new Label();
Label afterUpdate = new Label();
ExpressionUtil.visitLine(bc, getStart());
adapter.visitLabel(beforeInit);
if(init!=null) {
init.writeOut(bc, Expression.MODE_VALUE);
adapter.pop();
}
adapter.visitJumpInsn(Opcodes.GOTO, afterUpdate);
adapter.visitLabel(afterInit);
body.writeOut(bc);
adapter.visitLabel(beforeUpdate);
//ExpressionUtil.visitLine(bc, getStartLine());
if(update!=null) {
update.writeOut(bc, Expression.MODE_VALUE);
ASMUtil.pop(adapter,update, Expression.MODE_VALUE);
}
//ExpressionUtil.visitLine(bc, getStartLine());
adapter.visitLabel(afterUpdate);
if(condition!=null)condition.writeOut(bc, Expression.MODE_VALUE);
else LitBoolean.TRUE.writeOut(bc, Expression.MODE_VALUE);
adapter.visitJumpInsn(Opcodes.IFNE, afterInit);
//ExpressionUtil.visitLine(bc, getEndLine());
adapter.visitLabel(end);
}
@Override
public Label getBreakLabel() {
return end;
}
@Override
public Label getContinueLabel() {
return beforeUpdate;
}
@Override
public Body getBody() {
return body;
}
@Override
public String getLabel() {
return label;
}
}