001/** 002 * 003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved. 004 * 005 * This library is free software; you can redistribute it and/or 006 * modify it under the terms of the GNU Lesser General Public 007 * License as published by the Free Software Foundation; either 008 * version 2.1 of the License, or (at your option) any later version. 009 * 010 * This library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 * Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public 016 * License along with this library. If not, see <http://www.gnu.org/licenses/>. 017 * 018 **/ 019package lucee.transformer.bytecode.visitor; 020 021import lucee.transformer.bytecode.BytecodeContext; 022 023import org.objectweb.asm.Label; 024import org.objectweb.asm.Opcodes; 025import org.objectweb.asm.commons.GeneratorAdapter; 026 027public final class AndVisitor { 028 private Label end; 029 private Label l2; 030 public void visitBegin() { 031 end = new Label(); 032 l2 = new Label(); 033 } 034 public void visitMiddle(BytecodeContext bc) { 035 bc.getAdapter().ifZCmp(Opcodes.IFEQ, end); 036 037 038 039 } 040 public void visitEnd(BytecodeContext bc) { 041 GeneratorAdapter adapter = bc.getAdapter(); 042 adapter.ifZCmp(Opcodes.IFEQ, end); 043 adapter.push(true); 044 045 adapter.visitJumpInsn(Opcodes.GOTO, l2); 046 adapter.visitLabel(end); 047 048 adapter.push(false); 049 adapter.visitLabel(l2); 050 } 051}