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 DecisionIntVisitor {
028
029        public static final int GT=Opcodes.IF_ICMPGT;
030        public static final int GTE=Opcodes.IF_ICMPGE;
031        public static final int LT=Opcodes.IF_ICMPLT;
032        public static final int LTE=Opcodes.IF_ICMPLE;
033        public static final int EQ=Opcodes.IF_ICMPEQ;
034        public static final int NEQ=Opcodes.IF_ICMPNE;
035        
036        private int operation;
037        public void visitBegin() {
038
039        }
040        public void visitMiddle(int operation) {
041                this.operation=operation;
042        }
043        public void visitGT() {
044                this.operation=GT;
045        }
046        public void visitGTE() {
047                this.operation=GTE;
048        }
049        public void visitLT() {
050                this.operation=LT;
051        }
052        public void visitLTE() {
053                this.operation=LTE;
054        }
055        public void visitEQ() {
056                this.operation=EQ;
057        }
058        public void visitNEQ() {
059                this.operation=NEQ;
060        }
061        public void visitEnd(BytecodeContext bc) {
062                GeneratorAdapter adapter = bc.getAdapter();
063
064                Label l1 = new Label();
065                adapter.visitJumpInsn(operation, l1);
066                //mv.visitJumpInsn(IF_ICMPGT, l1);
067                adapter.visitInsn(Opcodes.ICONST_0);
068                Label l2 = new Label();
069                adapter.visitJumpInsn(Opcodes.GOTO, l2);
070                adapter.visitLabel(l1);
071                adapter.visitInsn(Opcodes.ICONST_1);
072                adapter.visitLabel(l2);
073
074        }
075}