1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/javap/src/main/java/org/apidesign/javap/StackMapData.java Mon Feb 25 19:00:08 2013 +0100
1.3 @@ -0,0 +1,71 @@
1.4 +/*
1.5 + * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +
1.30 +package org.apidesign.javap;
1.31 +
1.32 +import java.util.*;
1.33 +import java.io.*;
1.34 +
1.35 +import static org.apidesign.javap.RuntimeConstants.*;
1.36 +
1.37 +/* represents one entry of StackMap attribute
1.38 + */
1.39 +class StackMapData {
1.40 + final int offset;
1.41 + final int[] locals;
1.42 + final int[] stack;
1.43 +
1.44 + StackMapData(int offset, int[] locals, int[] stack) {
1.45 + this.offset = offset;
1.46 + this.locals = locals;
1.47 + this.stack = stack;
1.48 + }
1.49 +
1.50 + StackMapData(DataInputStream in, MethodData method) throws IOException {
1.51 + offset = in.readUnsignedShort();
1.52 + int local_size = in.readUnsignedShort();
1.53 + locals = readTypeArray(in, local_size, method);
1.54 + int stack_size = in.readUnsignedShort();
1.55 + stack = readTypeArray(in, stack_size, method);
1.56 + }
1.57 +
1.58 + static final int[] readTypeArray(DataInputStream in, int length, MethodData method) throws IOException {
1.59 + int[] types = new int[length];
1.60 + for (int i=0; i<length; i++) {
1.61 + types[i] = readType(in, method);
1.62 + }
1.63 + return types;
1.64 + }
1.65 +
1.66 + static final int readType(DataInputStream in, MethodData method) throws IOException {
1.67 + int type = in.readUnsignedByte();
1.68 + if (type == ITEM_Object || type == ITEM_NewObject) {
1.69 + type = type | (in.readUnsignedShort()<<8);
1.70 + }
1.71 + return type;
1.72 + }
1.73 +
1.74 +}