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