/*

  * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * This code 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 General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 package org.apidesign.javap;

 import java.util.*;

 import java.io.*;

 import static org.apidesign.javap.RuntimeConstants.*;

 /* represents one entry of StackMap attribute

  */

 class StackMapData {

     final int offset;

     final int[] locals;

     final int[] stack;

     StackMapData(int offset, int[] locals, int[] stack) {

         this.offset = offset;

         this.locals = locals;

         this.stack = stack;

     }

     StackMapData(DataInputStream in, MethodData method) throws IOException {

         offset = in.readUnsignedShort();

         int local_size = in.readUnsignedShort();

         locals = readTypeArray(in, local_size, method);

         int stack_size = in.readUnsignedShort();

         stack = readTypeArray(in, stack_size, method);

     }

     static final int[] readTypeArray(DataInputStream in, int length, MethodData method) throws IOException {

         int[] types = new int[length];

         for (int i=0; i<length; i++) {

             types[i] = readType(in, method);

         }

         return types;

     }

     static final int readType(DataInputStream in, MethodData method) throws IOException {

         int type = in.readUnsignedByte();

         if (type == ITEM_Object || type == ITEM_NewObject) {

             type = type | (in.readUnsignedShort()<<8);

         }

         return type;

     }

 }