1/* 2 * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26/* 27 * This file is available under and governed by the GNU General Public 28 * License version 2 only, as published by the Free Software Foundation. 29 * However, the following notice accompanied the original version of this 30 * file: 31 * 32 * ASM: a very small and fast Java bytecode manipulation framework 33 * Copyright (c) 2000-2007 INRIA, France Telecom 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the copyright holders nor the names of its 45 * contributors may be used to endorse or promote products derived from 46 * this software without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 49 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 52 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 53 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 54 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 55 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 56 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 57 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 58 * THE POSSIBILITY OF SUCH DAMAGE. 59 */ 60package com.sun.xml.internal.ws.org.objectweb.asm; 61 62/** 63 * An edge in the control flow graph of a method body. See {@link Label Label}. 64 * 65 * @author Eric Bruneton 66 */ 67class Edge { 68 69 /** 70 * Denotes a normal control flow graph edge. 71 */ 72 static final int NORMAL = 0; 73 74 /** 75 * Denotes a control flow graph edge corresponding to an exception handler. 76 * More precisely any {@link Edge} whose {@link #info} is strictly positive 77 * corresponds to an exception handler. The actual value of {@link #info} is 78 * the index, in the {@link ClassWriter} type table, of the exception that 79 * is catched. 80 */ 81 static final int EXCEPTION = 0x7FFFFFFF; 82 83 /** 84 * Information about this control flow graph edge. If 85 * {@link ClassWriter#COMPUTE_MAXS} is used this field is the (relative) 86 * stack size in the basic block from which this edge originates. This size 87 * is equal to the stack size at the "jump" instruction to which this edge 88 * corresponds, relatively to the stack size at the beginning of the 89 * originating basic block. If {@link ClassWriter#COMPUTE_FRAMES} is used, 90 * this field is the kind of this control flow graph edge (i.e. NORMAL or 91 * EXCEPTION). 92 */ 93 int info; 94 95 /** 96 * The successor block of the basic block from which this edge originates. 97 */ 98 Label successor; 99 100 /** 101 * The next edge in the list of successors of the originating basic block. 102 * See {@link Label#successors successors}. 103 */ 104 Edge next; 105} 106