jtulach@144: /*
jtulach@144:  * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
jtulach@144:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jtulach@144:  *
jtulach@144:  * This code is free software; you can redistribute it and/or modify it
jtulach@144:  * under the terms of the GNU General Public License version 2 only, as
jtulach@144:  * published by the Free Software Foundation.  Oracle designates this
jtulach@144:  * particular file as subject to the "Classpath" exception as provided
jtulach@144:  * by Oracle in the LICENSE file that accompanied this code.
jtulach@144:  *
jtulach@144:  * This code is distributed in the hope that it will be useful, but WITHOUT
jtulach@144:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jtulach@144:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jtulach@144:  * version 2 for more details (a copy is included in the LICENSE file that
jtulach@144:  * accompanied this code).
jtulach@144:  *
jtulach@144:  * You should have received a copy of the GNU General Public License version
jtulach@144:  * 2 along with this work; if not, write to the Free Software Foundation,
jtulach@144:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jtulach@144:  *
jtulach@144:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
jtulach@144:  * or visit www.oracle.com if you need additional information or have any
jtulach@144:  * questions.
jtulach@144:  */
jtulach@144: 
jtulach@144: 
jtulach@167: package org.apidesign.javap;
jtulach@144: 
jtulach@144: import java.util.*;
jtulach@144: import java.io.*;
jtulach@144: 
jtulach@167: import static org.apidesign.javap.RuntimeConstants.*;
jtulach@144: 
jtulach@144: /* represents one entry of StackMap attribute
jtulach@144:  */
jtulach@144: class StackMapData {
jtulach@144:     final int offset;
jtulach@144:     final int[] locals;
jtulach@144:     final int[] stack;
jtulach@144: 
jtulach@144:     StackMapData(int offset, int[] locals, int[] stack) {
jtulach@144:         this.offset = offset;
jtulach@144:         this.locals = locals;
jtulach@144:         this.stack = stack;
jtulach@144:     }
jtulach@144: 
jtulach@144:     StackMapData(DataInputStream in, MethodData method) throws IOException {
jtulach@144:         offset = in.readUnsignedShort();
jtulach@144:         int local_size = in.readUnsignedShort();
jtulach@144:         locals = readTypeArray(in, local_size, method);
jtulach@144:         int stack_size = in.readUnsignedShort();
jtulach@144:         stack = readTypeArray(in, stack_size, method);
jtulach@144:     }
jtulach@144: 
jtulach@144:     static final int[] readTypeArray(DataInputStream in, int length, MethodData method) throws IOException {
jtulach@144:         int[] types = new int[length];
jtulach@144:         for (int i=0; i<length; i++) {
jtulach@144:             types[i] = readType(in, method);
jtulach@144:         }
jtulach@144:         return types;
jtulach@144:     }
jtulach@144: 
jtulach@144:     static final int readType(DataInputStream in, MethodData method) throws IOException {
jtulach@144:         int type = in.readUnsignedByte();
jtulach@144:         if (type == ITEM_Object || type == ITEM_NewObject) {
jtulach@144:             type = type | (in.readUnsignedShort()<<8);
jtulach@144:         }
jtulach@144:         return type;
jtulach@144:     }
jtulach@144: 
jtulach@144: }