| /******************************************************************************* |
| * Copyright (c) 2000, 2009 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.core.util; |
| |
| /** |
| * Description of a stack map frame as specified in the JVM specifications. |
| * |
| * This interface may be implemented by clients. |
| * |
| * @since 3.2 |
| */ |
| public interface IStackMapFrame { |
| |
| /** |
| * Answer back the frame type for this entry. |
| * <table> |
| * <tr> |
| * <th align="left">Type</th> |
| * <th align="left">Range</th> |
| * </tr> |
| * <tr> |
| * <td>SAME</td> |
| * <td>0-63</td> |
| * </tr> |
| * <tr> |
| * <td>SAME_LOCALS_1_STACK_ITEM</td> |
| * <td>64-127</td> |
| * </tr> |
| * <tr> |
| * <td>SAME_LOCALS_1_STACK_ITEM_EXTENDED</td> |
| * <td>247</td> |
| * </tr> |
| * <tr> |
| * <td>CHOP</td> |
| * <td>248-250</td> |
| * </tr> |
| * <tr> |
| * <td>SAME_FRAME_EXTENDED</td> |
| * <td>251</td> |
| * </tr> |
| * <tr> |
| * <td>APPEND</td> |
| * <td>252-254</td> |
| * </tr> |
| * <tr> |
| * <td>FULL_FRAME</td> |
| * <td>255</td> |
| * </tr> |
| * </table> |
| * |
| * @return the frame type for this entry |
| */ |
| int getFrameType(); |
| |
| /** |
| * Answer back the offset delta. |
| * <p>This is not defined only for the frame types SAME and SAME_LOCALS_1_STACK_ITEM.</p> |
| * |
| * @return the offset delta |
| */ |
| int getOffsetDelta(); |
| |
| /** |
| * Answer back the number of locals. |
| * <p>This is defined only for the frame type FULL_FRAME.</p> |
| * |
| * @return the number of locals |
| */ |
| int getNumberOfLocals(); |
| |
| /** |
| * Answer back verification infos for the defined locals. |
| * <p>This is defined only for frame types APPEND and FULL_FRAME. |
| * |
| * @return verification infos for the defined locals |
| */ |
| IVerificationTypeInfo[] getLocals(); |
| |
| /** |
| * Answer back the number of stack items |
| * <p>This is defined only for the frame types SAME_LOCALS_1_STACK_ITEM, SAME_LOCALS_1_STACK_ITEM_EXTENDED and FULL_FRAME. |
| * For SAME_LOCALS_1_STACK_ITEM and SAME_LOCALS_1_STACK_ITEM_EXTENDED, the answer is implicitely 1.</p> |
| * |
| * @return the number of stack items |
| */ |
| int getNumberOfStackItems(); |
| |
| /** |
| * Answer back the verification infos for the stack items. |
| * |
| * @return the verification infos for the stack items |
| */ |
| IVerificationTypeInfo[] getStackItems(); |
| } |