/**
*
* Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
**/
package lucee.transformer.bytecode.statement;
import lucee.transformer.Factory;
import lucee.transformer.Position;
import lucee.transformer.TransformerException;
import lucee.transformer.bytecode.Body;
import lucee.transformer.bytecode.BytecodeContext;
import lucee.transformer.bytecode.util.ASMUtil;
import lucee.transformer.bytecode.util.ExpressionUtil;
import lucee.transformer.expression.Expression;
import org.objectweb.asm.Label;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.commons.GeneratorAdapter;
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(Factory f, Expression init,Expression condition,Expression update,Body body,Position start, Position end, String label) {
super(f,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 TransformerException {
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 bc.getFactory().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;
}
}