lucee.transformer.bytecode.visitor.AndVisitor.java Source code

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Here is the source code for lucee.transformer.bytecode.visitor.AndVisitor.java

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/**
 *
 * 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.visitor;

import lucee.transformer.bytecode.BytecodeContext;

import org.objectweb.asm.Label;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.commons.GeneratorAdapter;

public final class AndVisitor {
    private Label end;
    private Label l2;

    public void visitBegin() {
        end = new Label();
        l2 = new Label();
    }

    public void visitMiddle(BytecodeContext bc) {
        bc.getAdapter().ifZCmp(Opcodes.IFEQ, end);

    }

    public void visitEnd(BytecodeContext bc) {
        GeneratorAdapter adapter = bc.getAdapter();
        adapter.ifZCmp(Opcodes.IFEQ, end);
        adapter.push(true);

        adapter.visitJumpInsn(Opcodes.GOTO, l2);
        adapter.visitLabel(end);

        adapter.push(false);
        adapter.visitLabel(l2);
    }
}