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jeremybenn |
/***
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* ASM: a very small and fast Java bytecode manipulation framework
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* Copyright (c) 2000-2005 INRIA, France Telecom
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.objectweb.asm;
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import java.io.InputStream;
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import java.io.IOException;
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/**
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* A Java class parser to make a {@link ClassVisitor} visit an existing class.
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* This class parses a byte array conforming to the Java class file format and
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* calls the appropriate visit methods of a given class visitor for each field,
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* method and bytecode instruction encountered.
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*
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* @author Eric Bruneton
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* @author Eugene Kuleshov
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*/
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public class ClassReader {
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/**
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* The class to be parsed. <i>The content of this array must not be
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* modified. This field is intended for {@link Attribute} sub classes, and
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* is normally not needed by class generators or adapters.</i>
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*/
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public final byte[] b;
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/**
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* The start index of each constant pool item in {@link #b b}, plus one.
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* The one byte offset skips the constant pool item tag that indicates its
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* type.
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*/
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private int[] items;
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/**
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* The String objects corresponding to the CONSTANT_Utf8 items. This cache
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* avoids multiple parsing of a given CONSTANT_Utf8 constant pool item,
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* which GREATLY improves performances (by a factor 2 to 3). This caching
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* strategy could be extended to all constant pool items, but its benefit
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* would not be so great for these items (because they are much less
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* expensive to parse than CONSTANT_Utf8 items).
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*/
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private String[] strings;
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/**
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* Maximum length of the strings contained in the constant pool of the
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* class.
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*/
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private int maxStringLength;
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/**
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* Start index of the class header information (access, name...) in
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* {@link #b b}.
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*/
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public final int header;
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// ------------------------------------------------------------------------
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// Constructors
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// ------------------------------------------------------------------------
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/**
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* Constructs a new {@link ClassReader} object.
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*
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* @param b the bytecode of the class to be read.
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*/
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public ClassReader(final byte[] b) {
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this(b, 0, b.length);
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}
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/**
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* Constructs a new {@link ClassReader} object.
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*
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* @param b the bytecode of the class to be read.
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* @param off the start offset of the class data.
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* @param len the length of the class data.
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*/
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public ClassReader(final byte[] b, final int off, final int len) {
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this.b = b;
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// parses the constant pool
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items = new int[readUnsignedShort(off + 8)];
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int ll = items.length;
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strings = new String[ll];
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int max = 0;
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int index = off + 10;
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for (int i = 1; i < ll; ++i) {
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items[i] = index + 1;
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int tag = b[index];
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int size;
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switch (tag) {
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case ClassWriter.FIELD:
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case ClassWriter.METH:
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case ClassWriter.IMETH:
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case ClassWriter.INT:
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case ClassWriter.FLOAT:
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case ClassWriter.NAME_TYPE:
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size = 5;
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break;
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case ClassWriter.LONG:
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case ClassWriter.DOUBLE:
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size = 9;
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++i;
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break;
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case ClassWriter.UTF8:
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size = 3 + readUnsignedShort(index + 1);
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if (size > max) {
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max = size;
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}
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break;
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// case ClassWriter.CLASS:
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// case ClassWriter.STR:
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default:
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size = 3;
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break;
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}
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index += size;
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}
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maxStringLength = max;
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// the class header information starts just after the constant pool
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header = index;
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}
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/**
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* Copies the constant pool data into the given {@link ClassWriter}. Should
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* be called before the {@link #accept(ClassVisitor,boolean)} method.
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*
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* @param classWriter the {@link ClassWriter} to copy constant pool into.
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*/
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void copyPool(final ClassWriter classWriter) {
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char[] buf = new char[maxStringLength];
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int ll = items.length;
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Item[] items2 = new Item[ll];
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for (int i = 1; i < ll; i++) {
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int index = items[i];
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int tag = b[index - 1];
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Item item = new Item(i);
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int nameType;
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switch (tag) {
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case ClassWriter.FIELD:
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case ClassWriter.METH:
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case ClassWriter.IMETH:
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nameType = items[readUnsignedShort(index + 2)];
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item.set(tag,
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readClass(index, buf),
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readUTF8(nameType, buf),
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readUTF8(nameType + 2, buf));
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break;
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case ClassWriter.INT:
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item.set(readInt(index));
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break;
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case ClassWriter.FLOAT:
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item.set(Float.intBitsToFloat(readInt(index)));
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break;
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case ClassWriter.NAME_TYPE:
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item.set(tag,
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readUTF8(index, buf),
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readUTF8(index + 2, buf),
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null);
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break;
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case ClassWriter.LONG:
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item.set(readLong(index));
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++i;
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break;
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case ClassWriter.DOUBLE:
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item.set(Double.longBitsToDouble(readLong(index)));
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++i;
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break;
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case ClassWriter.UTF8: {
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String s = strings[i];
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if (s == null) {
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index = items[i];
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s = strings[i] = readUTF(index + 2,
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readUnsignedShort(index),
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buf);
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}
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item.set(tag, s, null, null);
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}
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break;
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// case ClassWriter.STR:
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// case ClassWriter.CLASS:
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default:
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item.set(tag, readUTF8(index, buf), null, null);
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break;
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}
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int index2 = item.hashCode % items2.length;
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item.next = items2[index2];
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items2[index2] = item;
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}
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int off = items[1] - 1;
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classWriter.pool.putByteArray(b, off, header - off);
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classWriter.items = items2;
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classWriter.threshold = (int) (0.75d * ll);
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classWriter.index = ll;
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}
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| 229 |
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/**
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| 230 |
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* Constructs a new {@link ClassReader} object.
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*
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* @param is an input stream from which to read the class.
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* @throws IOException if a problem occurs during reading.
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*/
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public ClassReader(final InputStream is) throws IOException {
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this(readClass(is));
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}
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| 238 |
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| 239 |
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/**
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| 240 |
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* Constructs a new {@link ClassReader} object.
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*
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| 242 |
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* @param name the fully qualified name of the class to be read.
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* @throws IOException if an exception occurs during reading.
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*/
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public ClassReader(final String name) throws IOException {
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this(ClassLoader.getSystemResourceAsStream(name.replace('.', '/')
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+ ".class"));
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}
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| 249 |
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| 250 |
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/**
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| 251 |
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* Reads the bytecode of a class.
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*
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* @param is an input stream from which to read the class.
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| 254 |
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* @return the bytecode read from the given input stream.
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* @throws IOException if a problem occurs during reading.
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*/
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private static byte[] readClass(final InputStream is) throws IOException {
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| 258 |
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if (is == null) {
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throw new IOException("Class not found");
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| 260 |
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}
|
| 261 |
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byte[] b = new byte[is.available()];
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| 262 |
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int len = 0;
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| 263 |
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while (true) {
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| 264 |
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int n = is.read(b, len, b.length - len);
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| 265 |
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if (n == -1) {
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| 266 |
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if (len < b.length) {
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| 267 |
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byte[] c = new byte[len];
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| 268 |
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System.arraycopy(b, 0, c, 0, len);
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b = c;
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| 270 |
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}
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| 271 |
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return b;
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| 272 |
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}
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| 273 |
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len += n;
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| 274 |
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if (len == b.length) {
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| 275 |
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byte[] c = new byte[b.length + 1000];
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| 276 |
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System.arraycopy(b, 0, c, 0, len);
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b = c;
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| 278 |
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}
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| 279 |
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}
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| 280 |
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}
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| 281 |
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| 282 |
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// ------------------------------------------------------------------------
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| 283 |
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// Public methods
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| 284 |
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// ------------------------------------------------------------------------
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| 285 |
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| 286 |
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/**
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| 287 |
|
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* Makes the given visitor visit the Java class of this {@link ClassReader}.
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| 288 |
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* This class is the one specified in the constructor (see
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| 289 |
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* {@link #ClassReader(byte[]) ClassReader}).
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| 290 |
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*
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| 291 |
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* @param classVisitor the visitor that must visit this class.
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| 292 |
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* @param skipDebug <tt>true</tt> if the debug information of the class
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| 293 |
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* must not be visited. In this case the
|
| 294 |
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* {@link MethodVisitor#visitLocalVariable visitLocalVariable} and
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| 295 |
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* {@link MethodVisitor#visitLineNumber visitLineNumber} methods will
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| 296 |
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* not be called.
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| 297 |
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*/
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| 298 |
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public void accept(final ClassVisitor classVisitor, final boolean skipDebug)
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| 299 |
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{
|
| 300 |
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accept(classVisitor, new Attribute[0], skipDebug);
|
| 301 |
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}
|
| 302 |
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|
| 303 |
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/**
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| 304 |
|
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* Makes the given visitor visit the Java class of this {@link ClassReader}.
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| 305 |
|
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* This class is the one specified in the constructor (see
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| 306 |
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* {@link #ClassReader(byte[]) ClassReader}).
|
| 307 |
|
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*
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| 308 |
|
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* @param classVisitor the visitor that must visit this class.
|
| 309 |
|
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* @param attrs prototypes of the attributes that must be parsed during the
|
| 310 |
|
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* visit of the class. Any attribute whose type is not equal to the
|
| 311 |
|
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* type of one the prototypes will be ignored.
|
| 312 |
|
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* @param skipDebug <tt>true</tt> if the debug information of the class
|
| 313 |
|
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* must not be visited. In this case the
|
| 314 |
|
|
* {@link MethodVisitor#visitLocalVariable visitLocalVariable} and
|
| 315 |
|
|
* {@link MethodVisitor#visitLineNumber visitLineNumber} methods will
|
| 316 |
|
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* not be called.
|
| 317 |
|
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*/
|
| 318 |
|
|
public void accept(
|
| 319 |
|
|
final ClassVisitor classVisitor,
|
| 320 |
|
|
final Attribute[] attrs,
|
| 321 |
|
|
final boolean skipDebug)
|
| 322 |
|
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{
|
| 323 |
|
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byte[] b = this.b; // the bytecode array
|
| 324 |
|
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char[] c = new char[maxStringLength]; // buffer used to read strings
|
| 325 |
|
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int i, j, k; // loop variables
|
| 326 |
|
|
int u, v, w; // indexes in b
|
| 327 |
|
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Attribute attr;
|
| 328 |
|
|
|
| 329 |
|
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int access;
|
| 330 |
|
|
String name;
|
| 331 |
|
|
String desc;
|
| 332 |
|
|
String attrName;
|
| 333 |
|
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String signature;
|
| 334 |
|
|
int anns = 0;
|
| 335 |
|
|
int ianns = 0;
|
| 336 |
|
|
Attribute cattrs = null;
|
| 337 |
|
|
|
| 338 |
|
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// visits the header
|
| 339 |
|
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u = header;
|
| 340 |
|
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access = readUnsignedShort(u);
|
| 341 |
|
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name = readClass(u + 2, c);
|
| 342 |
|
|
v = items[readUnsignedShort(u + 4)];
|
| 343 |
|
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String superClassName = v == 0 ? null : readUTF8(v, c);
|
| 344 |
|
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String[] implementedItfs = new String[readUnsignedShort(u + 6)];
|
| 345 |
|
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w = 0;
|
| 346 |
|
|
u += 8;
|
| 347 |
|
|
for (i = 0; i < implementedItfs.length; ++i) {
|
| 348 |
|
|
implementedItfs[i] = readClass(u, c);
|
| 349 |
|
|
u += 2;
|
| 350 |
|
|
}
|
| 351 |
|
|
|
| 352 |
|
|
// skips fields and methods
|
| 353 |
|
|
v = u;
|
| 354 |
|
|
i = readUnsignedShort(v);
|
| 355 |
|
|
v += 2;
|
| 356 |
|
|
for (; i > 0; --i) {
|
| 357 |
|
|
j = readUnsignedShort(v + 6);
|
| 358 |
|
|
v += 8;
|
| 359 |
|
|
for (; j > 0; --j) {
|
| 360 |
|
|
v += 6 + readInt(v + 2);
|
| 361 |
|
|
}
|
| 362 |
|
|
}
|
| 363 |
|
|
i = readUnsignedShort(v);
|
| 364 |
|
|
v += 2;
|
| 365 |
|
|
for (; i > 0; --i) {
|
| 366 |
|
|
j = readUnsignedShort(v + 6);
|
| 367 |
|
|
v += 8;
|
| 368 |
|
|
for (; j > 0; --j) {
|
| 369 |
|
|
v += 6 + readInt(v + 2);
|
| 370 |
|
|
}
|
| 371 |
|
|
}
|
| 372 |
|
|
// reads the class's attributes
|
| 373 |
|
|
signature = null;
|
| 374 |
|
|
String sourceFile = null;
|
| 375 |
|
|
String sourceDebug = null;
|
| 376 |
|
|
String enclosingOwner = null;
|
| 377 |
|
|
String enclosingName = null;
|
| 378 |
|
|
String enclosingDesc = null;
|
| 379 |
|
|
|
| 380 |
|
|
i = readUnsignedShort(v);
|
| 381 |
|
|
v += 2;
|
| 382 |
|
|
for (; i > 0; --i) {
|
| 383 |
|
|
attrName = readUTF8(v, c);
|
| 384 |
|
|
if (attrName.equals("SourceFile")) {
|
| 385 |
|
|
sourceFile = readUTF8(v + 6, c);
|
| 386 |
|
|
} else if (attrName.equals("Deprecated")) {
|
| 387 |
|
|
access |= Opcodes.ACC_DEPRECATED;
|
| 388 |
|
|
} else if (attrName.equals("Synthetic")) {
|
| 389 |
|
|
access |= Opcodes.ACC_SYNTHETIC;
|
| 390 |
|
|
} else if (attrName.equals("Annotation")) {
|
| 391 |
|
|
access |= Opcodes.ACC_ANNOTATION;
|
| 392 |
|
|
} else if (attrName.equals("Enum")) {
|
| 393 |
|
|
access |= Opcodes.ACC_ENUM;
|
| 394 |
|
|
} else if (attrName.equals("InnerClasses")) {
|
| 395 |
|
|
w = v + 6;
|
| 396 |
|
|
} else if (attrName.equals("Signature")) {
|
| 397 |
|
|
signature = readUTF8(v + 6, c);
|
| 398 |
|
|
} else if (attrName.equals("SourceDebugExtension")) {
|
| 399 |
|
|
int len = readInt(v + 2);
|
| 400 |
|
|
sourceDebug = readUTF(v + 6, len, new char[len]);
|
| 401 |
|
|
} else if (attrName.equals("EnclosingMethod")) {
|
| 402 |
|
|
enclosingOwner = readClass(v + 6, c);
|
| 403 |
|
|
int item = readUnsignedShort(v + 8);
|
| 404 |
|
|
if (item != 0) {
|
| 405 |
|
|
enclosingName = readUTF8(items[item], c);
|
| 406 |
|
|
enclosingDesc = readUTF8(items[item] + 2, c);
|
| 407 |
|
|
}
|
| 408 |
|
|
} else if (attrName.equals("RuntimeVisibleAnnotations")) {
|
| 409 |
|
|
anns = v + 6;
|
| 410 |
|
|
} else if (attrName.equals("RuntimeInvisibleAnnotations")) {
|
| 411 |
|
|
ianns = v + 6;
|
| 412 |
|
|
} else {
|
| 413 |
|
|
attr = readAttribute(attrs,
|
| 414 |
|
|
attrName,
|
| 415 |
|
|
v + 6,
|
| 416 |
|
|
readInt(v + 2),
|
| 417 |
|
|
c,
|
| 418 |
|
|
-1,
|
| 419 |
|
|
null);
|
| 420 |
|
|
if (attr != null) {
|
| 421 |
|
|
attr.next = cattrs;
|
| 422 |
|
|
cattrs = attr;
|
| 423 |
|
|
}
|
| 424 |
|
|
}
|
| 425 |
|
|
v += 6 + readInt(v + 2);
|
| 426 |
|
|
}
|
| 427 |
|
|
// calls the visit method
|
| 428 |
|
|
classVisitor.visit(readInt(4),
|
| 429 |
|
|
access,
|
| 430 |
|
|
name,
|
| 431 |
|
|
signature,
|
| 432 |
|
|
superClassName,
|
| 433 |
|
|
implementedItfs);
|
| 434 |
|
|
|
| 435 |
|
|
// calls the visitSource method
|
| 436 |
|
|
if (sourceFile != null || sourceDebug != null) {
|
| 437 |
|
|
classVisitor.visitSource(sourceFile, sourceDebug);
|
| 438 |
|
|
}
|
| 439 |
|
|
|
| 440 |
|
|
// calls the visitOuterClass method
|
| 441 |
|
|
if (enclosingOwner != null) {
|
| 442 |
|
|
classVisitor.visitOuterClass(enclosingOwner,
|
| 443 |
|
|
enclosingName,
|
| 444 |
|
|
enclosingDesc);
|
| 445 |
|
|
}
|
| 446 |
|
|
|
| 447 |
|
|
// visits the class annotations
|
| 448 |
|
|
for (i = 1; i >= 0; --i) {
|
| 449 |
|
|
v = i == 0 ? ianns : anns;
|
| 450 |
|
|
if (v != 0) {
|
| 451 |
|
|
j = readUnsignedShort(v);
|
| 452 |
|
|
v += 2;
|
| 453 |
|
|
for (; j > 0; --j) {
|
| 454 |
|
|
desc = readUTF8(v, c);
|
| 455 |
|
|
v += 2;
|
| 456 |
|
|
v = readAnnotationValues(v,
|
| 457 |
|
|
c,
|
| 458 |
|
|
classVisitor.visitAnnotation(desc, i != 0));
|
| 459 |
|
|
}
|
| 460 |
|
|
}
|
| 461 |
|
|
}
|
| 462 |
|
|
|
| 463 |
|
|
// visits the class attributes
|
| 464 |
|
|
while (cattrs != null) {
|
| 465 |
|
|
attr = cattrs.next;
|
| 466 |
|
|
cattrs.next = null;
|
| 467 |
|
|
classVisitor.visitAttribute(cattrs);
|
| 468 |
|
|
cattrs = attr;
|
| 469 |
|
|
}
|
| 470 |
|
|
|
| 471 |
|
|
// class the visitInnerClass method
|
| 472 |
|
|
if (w != 0) {
|
| 473 |
|
|
i = readUnsignedShort(w);
|
| 474 |
|
|
w += 2;
|
| 475 |
|
|
for (; i > 0; --i) {
|
| 476 |
|
|
classVisitor.visitInnerClass(readUnsignedShort(w) == 0
|
| 477 |
|
|
? null
|
| 478 |
|
|
: readClass(w, c), readUnsignedShort(w + 2) == 0
|
| 479 |
|
|
? null
|
| 480 |
|
|
: readClass(w + 2, c), readUnsignedShort(w + 4) == 0
|
| 481 |
|
|
? null
|
| 482 |
|
|
: readUTF8(w + 4, c), readUnsignedShort(w + 6));
|
| 483 |
|
|
w += 8;
|
| 484 |
|
|
}
|
| 485 |
|
|
}
|
| 486 |
|
|
|
| 487 |
|
|
// visits the fields
|
| 488 |
|
|
i = readUnsignedShort(u);
|
| 489 |
|
|
u += 2;
|
| 490 |
|
|
for (; i > 0; --i) {
|
| 491 |
|
|
access = readUnsignedShort(u);
|
| 492 |
|
|
name = readUTF8(u + 2, c);
|
| 493 |
|
|
desc = readUTF8(u + 4, c);
|
| 494 |
|
|
// visits the field's attributes and looks for a ConstantValue
|
| 495 |
|
|
// attribute
|
| 496 |
|
|
int fieldValueItem = 0;
|
| 497 |
|
|
signature = null;
|
| 498 |
|
|
anns = 0;
|
| 499 |
|
|
ianns = 0;
|
| 500 |
|
|
cattrs = null;
|
| 501 |
|
|
|
| 502 |
|
|
j = readUnsignedShort(u + 6);
|
| 503 |
|
|
u += 8;
|
| 504 |
|
|
for (; j > 0; --j) {
|
| 505 |
|
|
attrName = readUTF8(u, c);
|
| 506 |
|
|
if (attrName.equals("ConstantValue")) {
|
| 507 |
|
|
fieldValueItem = readUnsignedShort(u + 6);
|
| 508 |
|
|
} else if (attrName.equals("Synthetic")) {
|
| 509 |
|
|
access |= Opcodes.ACC_SYNTHETIC;
|
| 510 |
|
|
} else if (attrName.equals("Deprecated")) {
|
| 511 |
|
|
access |= Opcodes.ACC_DEPRECATED;
|
| 512 |
|
|
} else if (attrName.equals("Enum")) {
|
| 513 |
|
|
access |= Opcodes.ACC_ENUM;
|
| 514 |
|
|
} else if (attrName.equals("Signature")) {
|
| 515 |
|
|
signature = readUTF8(u + 6, c);
|
| 516 |
|
|
} else if (attrName.equals("RuntimeVisibleAnnotations")) {
|
| 517 |
|
|
anns = u + 6;
|
| 518 |
|
|
} else if (attrName.equals("RuntimeInvisibleAnnotations")) {
|
| 519 |
|
|
ianns = u + 6;
|
| 520 |
|
|
} else {
|
| 521 |
|
|
attr = readAttribute(attrs,
|
| 522 |
|
|
attrName,
|
| 523 |
|
|
u + 6,
|
| 524 |
|
|
readInt(u + 2),
|
| 525 |
|
|
c,
|
| 526 |
|
|
-1,
|
| 527 |
|
|
null);
|
| 528 |
|
|
if (attr != null) {
|
| 529 |
|
|
attr.next = cattrs;
|
| 530 |
|
|
cattrs = attr;
|
| 531 |
|
|
}
|
| 532 |
|
|
}
|
| 533 |
|
|
u += 6 + readInt(u + 2);
|
| 534 |
|
|
}
|
| 535 |
|
|
// reads the field's value, if any
|
| 536 |
|
|
Object value = (fieldValueItem == 0
|
| 537 |
|
|
? null
|
| 538 |
|
|
: readConst(fieldValueItem, c));
|
| 539 |
|
|
// visits the field
|
| 540 |
|
|
FieldVisitor fv = classVisitor.visitField(access,
|
| 541 |
|
|
name,
|
| 542 |
|
|
desc,
|
| 543 |
|
|
signature,
|
| 544 |
|
|
value);
|
| 545 |
|
|
// visits the field annotations and attributes
|
| 546 |
|
|
if (fv != null) {
|
| 547 |
|
|
for (j = 1; j >= 0; --j) {
|
| 548 |
|
|
v = j == 0 ? ianns : anns;
|
| 549 |
|
|
if (v != 0) {
|
| 550 |
|
|
k = readUnsignedShort(v);
|
| 551 |
|
|
v += 2;
|
| 552 |
|
|
for (; k > 0; --k) {
|
| 553 |
|
|
desc = readUTF8(v, c);
|
| 554 |
|
|
v += 2;
|
| 555 |
|
|
v = readAnnotationValues(v,
|
| 556 |
|
|
c,
|
| 557 |
|
|
fv.visitAnnotation(desc, j != 0));
|
| 558 |
|
|
}
|
| 559 |
|
|
}
|
| 560 |
|
|
}
|
| 561 |
|
|
while (cattrs != null) {
|
| 562 |
|
|
attr = cattrs.next;
|
| 563 |
|
|
cattrs.next = null;
|
| 564 |
|
|
fv.visitAttribute(cattrs);
|
| 565 |
|
|
cattrs = attr;
|
| 566 |
|
|
}
|
| 567 |
|
|
fv.visitEnd();
|
| 568 |
|
|
}
|
| 569 |
|
|
}
|
| 570 |
|
|
|
| 571 |
|
|
// visits the methods
|
| 572 |
|
|
i = readUnsignedShort(u);
|
| 573 |
|
|
u += 2;
|
| 574 |
|
|
for (; i > 0; --i) {
|
| 575 |
|
|
int u0 = u + 6;
|
| 576 |
|
|
access = readUnsignedShort(u);
|
| 577 |
|
|
name = readUTF8(u + 2, c);
|
| 578 |
|
|
desc = readUTF8(u + 4, c);
|
| 579 |
|
|
signature = null;
|
| 580 |
|
|
anns = 0;
|
| 581 |
|
|
ianns = 0;
|
| 582 |
|
|
int dann = 0;
|
| 583 |
|
|
int mpanns = 0;
|
| 584 |
|
|
int impanns = 0;
|
| 585 |
|
|
cattrs = null;
|
| 586 |
|
|
v = 0;
|
| 587 |
|
|
w = 0;
|
| 588 |
|
|
|
| 589 |
|
|
// looks for Code and Exceptions attributes
|
| 590 |
|
|
j = readUnsignedShort(u + 6);
|
| 591 |
|
|
u += 8;
|
| 592 |
|
|
for (; j > 0; --j) {
|
| 593 |
|
|
attrName = readUTF8(u, c);
|
| 594 |
|
|
u += 2;
|
| 595 |
|
|
int attrSize = readInt(u);
|
| 596 |
|
|
u += 4;
|
| 597 |
|
|
if (attrName.equals("Code")) {
|
| 598 |
|
|
v = u;
|
| 599 |
|
|
} else if (attrName.equals("Exceptions")) {
|
| 600 |
|
|
w = u;
|
| 601 |
|
|
} else if (attrName.equals("Synthetic")) {
|
| 602 |
|
|
access |= Opcodes.ACC_SYNTHETIC;
|
| 603 |
|
|
} else if (attrName.equals("Varargs")) {
|
| 604 |
|
|
access |= Opcodes.ACC_VARARGS;
|
| 605 |
|
|
} else if (attrName.equals("Bridge")) {
|
| 606 |
|
|
access |= Opcodes.ACC_BRIDGE;
|
| 607 |
|
|
} else if (attrName.equals("Deprecated")) {
|
| 608 |
|
|
access |= Opcodes.ACC_DEPRECATED;
|
| 609 |
|
|
} else if (attrName.equals("Signature")) {
|
| 610 |
|
|
signature = readUTF8(u, c);
|
| 611 |
|
|
} else if (attrName.equals("AnnotationDefault")) {
|
| 612 |
|
|
dann = u;
|
| 613 |
|
|
} else if (attrName.equals("RuntimeVisibleAnnotations")) {
|
| 614 |
|
|
anns = u;
|
| 615 |
|
|
} else if (attrName.equals("RuntimeInvisibleAnnotations")) {
|
| 616 |
|
|
ianns = u;
|
| 617 |
|
|
} else if (attrName.equals("RuntimeVisibleParameterAnnotations"))
|
| 618 |
|
|
{
|
| 619 |
|
|
mpanns = u;
|
| 620 |
|
|
} else if (attrName.equals("RuntimeInvisibleParameterAnnotations"))
|
| 621 |
|
|
{
|
| 622 |
|
|
impanns = u;
|
| 623 |
|
|
} else {
|
| 624 |
|
|
attr = readAttribute(attrs,
|
| 625 |
|
|
attrName,
|
| 626 |
|
|
u,
|
| 627 |
|
|
attrSize,
|
| 628 |
|
|
c,
|
| 629 |
|
|
-1,
|
| 630 |
|
|
null);
|
| 631 |
|
|
if (attr != null) {
|
| 632 |
|
|
attr.next = cattrs;
|
| 633 |
|
|
cattrs = attr;
|
| 634 |
|
|
}
|
| 635 |
|
|
}
|
| 636 |
|
|
u += attrSize;
|
| 637 |
|
|
}
|
| 638 |
|
|
// reads declared exceptions
|
| 639 |
|
|
String[] exceptions;
|
| 640 |
|
|
if (w == 0) {
|
| 641 |
|
|
exceptions = null;
|
| 642 |
|
|
} else {
|
| 643 |
|
|
exceptions = new String[readUnsignedShort(w)];
|
| 644 |
|
|
w += 2;
|
| 645 |
|
|
for (j = 0; j < exceptions.length; ++j) {
|
| 646 |
|
|
exceptions[j] = readClass(w, c);
|
| 647 |
|
|
w += 2;
|
| 648 |
|
|
}
|
| 649 |
|
|
}
|
| 650 |
|
|
|
| 651 |
|
|
// visits the method's code, if any
|
| 652 |
|
|
MethodVisitor mv = classVisitor.visitMethod(access,
|
| 653 |
|
|
name,
|
| 654 |
|
|
desc,
|
| 655 |
|
|
signature,
|
| 656 |
|
|
exceptions);
|
| 657 |
|
|
|
| 658 |
|
|
if (mv != null) {
|
| 659 |
|
|
/*
|
| 660 |
|
|
* if the returned MethodVisitor is in fact a MethodWriter, it
|
| 661 |
|
|
* means there is no method adapter between the reader and the
|
| 662 |
|
|
* writer. If, in addition, the writer's constant pool was
|
| 663 |
|
|
* copied from this reader (mw.cw.cr == this), and the signature
|
| 664 |
|
|
* and exceptions of the method have not been changed, then it
|
| 665 |
|
|
* is possible to skip all visit events and just copy the
|
| 666 |
|
|
* original code of the method to the writer (the access, name
|
| 667 |
|
|
* and descriptor can have been changed, this is not important
|
| 668 |
|
|
* since they are not copied as is from the reader).
|
| 669 |
|
|
*/
|
| 670 |
|
|
if (mv instanceof MethodWriter) {
|
| 671 |
|
|
MethodWriter mw = (MethodWriter) mv;
|
| 672 |
|
|
if (mw.cw.cr == this) {
|
| 673 |
|
|
if (signature == mw.signature) {
|
| 674 |
|
|
boolean sameExceptions = false;
|
| 675 |
|
|
if (exceptions == null) {
|
| 676 |
|
|
sameExceptions = mw.exceptionCount == 0;
|
| 677 |
|
|
} else {
|
| 678 |
|
|
if (exceptions.length == mw.exceptionCount) {
|
| 679 |
|
|
sameExceptions = true;
|
| 680 |
|
|
for (j = exceptions.length - 1; j >= 0; --j)
|
| 681 |
|
|
{
|
| 682 |
|
|
w -= 2;
|
| 683 |
|
|
if (mw.exceptions[j] != readUnsignedShort(w))
|
| 684 |
|
|
{
|
| 685 |
|
|
sameExceptions = false;
|
| 686 |
|
|
break;
|
| 687 |
|
|
}
|
| 688 |
|
|
}
|
| 689 |
|
|
}
|
| 690 |
|
|
}
|
| 691 |
|
|
if (sameExceptions) {
|
| 692 |
|
|
/*
|
| 693 |
|
|
* we do not copy directly the code into
|
| 694 |
|
|
* MethodWriter to save a byte array copy
|
| 695 |
|
|
* operation. The real copy will be done in
|
| 696 |
|
|
* ClassWriter.toByteArray().
|
| 697 |
|
|
*/
|
| 698 |
|
|
mw.classReaderOffset = u0;
|
| 699 |
|
|
mw.classReaderLength = u - u0;
|
| 700 |
|
|
continue;
|
| 701 |
|
|
}
|
| 702 |
|
|
}
|
| 703 |
|
|
}
|
| 704 |
|
|
}
|
| 705 |
|
|
if (dann != 0) {
|
| 706 |
|
|
AnnotationVisitor dv = mv.visitAnnotationDefault();
|
| 707 |
|
|
readAnnotationValue(dann, c, null, dv);
|
| 708 |
|
|
dv.visitEnd();
|
| 709 |
|
|
}
|
| 710 |
|
|
for (j = 1; j >= 0; --j) {
|
| 711 |
|
|
w = j == 0 ? ianns : anns;
|
| 712 |
|
|
if (w != 0) {
|
| 713 |
|
|
k = readUnsignedShort(w);
|
| 714 |
|
|
w += 2;
|
| 715 |
|
|
for (; k > 0; --k) {
|
| 716 |
|
|
desc = readUTF8(w, c);
|
| 717 |
|
|
w += 2;
|
| 718 |
|
|
w = readAnnotationValues(w,
|
| 719 |
|
|
c,
|
| 720 |
|
|
mv.visitAnnotation(desc, j != 0));
|
| 721 |
|
|
}
|
| 722 |
|
|
}
|
| 723 |
|
|
}
|
| 724 |
|
|
if (mpanns != 0) {
|
| 725 |
|
|
readParameterAnnotations(mpanns, c, true, mv);
|
| 726 |
|
|
}
|
| 727 |
|
|
if (impanns != 0) {
|
| 728 |
|
|
readParameterAnnotations(impanns, c, false, mv);
|
| 729 |
|
|
}
|
| 730 |
|
|
while (cattrs != null) {
|
| 731 |
|
|
attr = cattrs.next;
|
| 732 |
|
|
cattrs.next = null;
|
| 733 |
|
|
mv.visitAttribute(cattrs);
|
| 734 |
|
|
cattrs = attr;
|
| 735 |
|
|
}
|
| 736 |
|
|
}
|
| 737 |
|
|
|
| 738 |
|
|
if (mv != null && v != 0) {
|
| 739 |
|
|
int maxStack = readUnsignedShort(v);
|
| 740 |
|
|
int maxLocals = readUnsignedShort(v + 2);
|
| 741 |
|
|
int codeLength = readInt(v + 4);
|
| 742 |
|
|
v += 8;
|
| 743 |
|
|
|
| 744 |
|
|
int codeStart = v;
|
| 745 |
|
|
int codeEnd = v + codeLength;
|
| 746 |
|
|
|
| 747 |
|
|
mv.visitCode();
|
| 748 |
|
|
|
| 749 |
|
|
// 1st phase: finds the labels
|
| 750 |
|
|
int label;
|
| 751 |
|
|
Label[] labels = new Label[codeLength + 1];
|
| 752 |
|
|
while (v < codeEnd) {
|
| 753 |
|
|
int opcode = b[v] & 0xFF;
|
| 754 |
|
|
switch (ClassWriter.TYPE[opcode]) {
|
| 755 |
|
|
case ClassWriter.NOARG_INSN:
|
| 756 |
|
|
case ClassWriter.IMPLVAR_INSN:
|
| 757 |
|
|
v += 1;
|
| 758 |
|
|
break;
|
| 759 |
|
|
case ClassWriter.LABEL_INSN:
|
| 760 |
|
|
label = v - codeStart + readShort(v + 1);
|
| 761 |
|
|
if (labels[label] == null) {
|
| 762 |
|
|
labels[label] = new Label();
|
| 763 |
|
|
}
|
| 764 |
|
|
v += 3;
|
| 765 |
|
|
break;
|
| 766 |
|
|
case ClassWriter.LABELW_INSN:
|
| 767 |
|
|
label = v - codeStart + readInt(v + 1);
|
| 768 |
|
|
if (labels[label] == null) {
|
| 769 |
|
|
labels[label] = new Label();
|
| 770 |
|
|
}
|
| 771 |
|
|
v += 5;
|
| 772 |
|
|
break;
|
| 773 |
|
|
case ClassWriter.WIDE_INSN:
|
| 774 |
|
|
opcode = b[v + 1] & 0xFF;
|
| 775 |
|
|
if (opcode == Opcodes.IINC) {
|
| 776 |
|
|
v += 6;
|
| 777 |
|
|
} else {
|
| 778 |
|
|
v += 4;
|
| 779 |
|
|
}
|
| 780 |
|
|
break;
|
| 781 |
|
|
case ClassWriter.TABL_INSN:
|
| 782 |
|
|
// skips 0 to 3 padding bytes
|
| 783 |
|
|
w = v - codeStart;
|
| 784 |
|
|
v = v + 4 - (w & 3);
|
| 785 |
|
|
// reads instruction
|
| 786 |
|
|
label = w + readInt(v);
|
| 787 |
|
|
v += 4;
|
| 788 |
|
|
if (labels[label] == null) {
|
| 789 |
|
|
labels[label] = new Label();
|
| 790 |
|
|
}
|
| 791 |
|
|
j = readInt(v);
|
| 792 |
|
|
v += 4;
|
| 793 |
|
|
j = readInt(v) - j + 1;
|
| 794 |
|
|
v += 4;
|
| 795 |
|
|
for (; j > 0; --j) {
|
| 796 |
|
|
label = w + readInt(v);
|
| 797 |
|
|
v += 4;
|
| 798 |
|
|
if (labels[label] == null) {
|
| 799 |
|
|
labels[label] = new Label();
|
| 800 |
|
|
}
|
| 801 |
|
|
}
|
| 802 |
|
|
break;
|
| 803 |
|
|
case ClassWriter.LOOK_INSN:
|
| 804 |
|
|
// skips 0 to 3 padding bytes
|
| 805 |
|
|
w = v - codeStart;
|
| 806 |
|
|
v = v + 4 - (w & 3);
|
| 807 |
|
|
// reads instruction
|
| 808 |
|
|
label = w + readInt(v);
|
| 809 |
|
|
v += 4;
|
| 810 |
|
|
if (labels[label] == null) {
|
| 811 |
|
|
labels[label] = new Label();
|
| 812 |
|
|
}
|
| 813 |
|
|
j = readInt(v);
|
| 814 |
|
|
v += 4;
|
| 815 |
|
|
for (; j > 0; --j) {
|
| 816 |
|
|
v += 4; // skips key
|
| 817 |
|
|
label = w + readInt(v);
|
| 818 |
|
|
v += 4;
|
| 819 |
|
|
if (labels[label] == null) {
|
| 820 |
|
|
labels[label] = new Label();
|
| 821 |
|
|
}
|
| 822 |
|
|
}
|
| 823 |
|
|
break;
|
| 824 |
|
|
case ClassWriter.VAR_INSN:
|
| 825 |
|
|
case ClassWriter.SBYTE_INSN:
|
| 826 |
|
|
case ClassWriter.LDC_INSN:
|
| 827 |
|
|
v += 2;
|
| 828 |
|
|
break;
|
| 829 |
|
|
case ClassWriter.SHORT_INSN:
|
| 830 |
|
|
case ClassWriter.LDCW_INSN:
|
| 831 |
|
|
case ClassWriter.FIELDORMETH_INSN:
|
| 832 |
|
|
case ClassWriter.TYPE_INSN:
|
| 833 |
|
|
case ClassWriter.IINC_INSN:
|
| 834 |
|
|
v += 3;
|
| 835 |
|
|
break;
|
| 836 |
|
|
case ClassWriter.ITFMETH_INSN:
|
| 837 |
|
|
v += 5;
|
| 838 |
|
|
break;
|
| 839 |
|
|
// case MANA_INSN:
|
| 840 |
|
|
default:
|
| 841 |
|
|
v += 4;
|
| 842 |
|
|
break;
|
| 843 |
|
|
}
|
| 844 |
|
|
}
|
| 845 |
|
|
// parses the try catch entries
|
| 846 |
|
|
j = readUnsignedShort(v);
|
| 847 |
|
|
v += 2;
|
| 848 |
|
|
for (; j > 0; --j) {
|
| 849 |
|
|
label = readUnsignedShort(v);
|
| 850 |
|
|
Label start = labels[label];
|
| 851 |
|
|
if (start == null) {
|
| 852 |
|
|
labels[label] = start = new Label();
|
| 853 |
|
|
}
|
| 854 |
|
|
label = readUnsignedShort(v + 2);
|
| 855 |
|
|
Label end = labels[label];
|
| 856 |
|
|
if (end == null) {
|
| 857 |
|
|
labels[label] = end = new Label();
|
| 858 |
|
|
}
|
| 859 |
|
|
label = readUnsignedShort(v + 4);
|
| 860 |
|
|
Label handler = labels[label];
|
| 861 |
|
|
if (handler == null) {
|
| 862 |
|
|
labels[label] = handler = new Label();
|
| 863 |
|
|
}
|
| 864 |
|
|
|
| 865 |
|
|
int type = readUnsignedShort(v + 6);
|
| 866 |
|
|
if (type == 0) {
|
| 867 |
|
|
mv.visitTryCatchBlock(start, end, handler, null);
|
| 868 |
|
|
} else {
|
| 869 |
|
|
mv.visitTryCatchBlock(start,
|
| 870 |
|
|
end,
|
| 871 |
|
|
handler,
|
| 872 |
|
|
readUTF8(items[type], c));
|
| 873 |
|
|
}
|
| 874 |
|
|
v += 8;
|
| 875 |
|
|
}
|
| 876 |
|
|
// parses the local variable, line number tables, and code
|
| 877 |
|
|
// attributes
|
| 878 |
|
|
int varTable = 0;
|
| 879 |
|
|
int varTypeTable = 0;
|
| 880 |
|
|
cattrs = null;
|
| 881 |
|
|
j = readUnsignedShort(v);
|
| 882 |
|
|
v += 2;
|
| 883 |
|
|
for (; j > 0; --j) {
|
| 884 |
|
|
attrName = readUTF8(v, c);
|
| 885 |
|
|
if (attrName.equals("LocalVariableTable")) {
|
| 886 |
|
|
if (!skipDebug) {
|
| 887 |
|
|
varTable = v + 6;
|
| 888 |
|
|
k = readUnsignedShort(v + 6);
|
| 889 |
|
|
w = v + 8;
|
| 890 |
|
|
for (; k > 0; --k) {
|
| 891 |
|
|
label = readUnsignedShort(w);
|
| 892 |
|
|
if (labels[label] == null) {
|
| 893 |
|
|
labels[label] = new Label();
|
| 894 |
|
|
}
|
| 895 |
|
|
label += readUnsignedShort(w + 2);
|
| 896 |
|
|
if (labels[label] == null) {
|
| 897 |
|
|
labels[label] = new Label();
|
| 898 |
|
|
}
|
| 899 |
|
|
w += 10;
|
| 900 |
|
|
}
|
| 901 |
|
|
}
|
| 902 |
|
|
} else if (attrName.equals("LocalVariableTypeTable")) {
|
| 903 |
|
|
varTypeTable = v + 6;
|
| 904 |
|
|
} else if (attrName.equals("LineNumberTable")) {
|
| 905 |
|
|
if (!skipDebug) {
|
| 906 |
|
|
k = readUnsignedShort(v + 6);
|
| 907 |
|
|
w = v + 8;
|
| 908 |
|
|
for (; k > 0; --k) {
|
| 909 |
|
|
label = readUnsignedShort(w);
|
| 910 |
|
|
if (labels[label] == null) {
|
| 911 |
|
|
labels[label] = new Label();
|
| 912 |
|
|
}
|
| 913 |
|
|
labels[label].line = readUnsignedShort(w + 2);
|
| 914 |
|
|
w += 4;
|
| 915 |
|
|
}
|
| 916 |
|
|
}
|
| 917 |
|
|
} else {
|
| 918 |
|
|
for (k = 0; k < attrs.length; ++k) {
|
| 919 |
|
|
if (attrs[k].type.equals(attrName)) {
|
| 920 |
|
|
attr = attrs[k].read(this,
|
| 921 |
|
|
v + 6,
|
| 922 |
|
|
readInt(v + 2),
|
| 923 |
|
|
c,
|
| 924 |
|
|
codeStart - 8,
|
| 925 |
|
|
labels);
|
| 926 |
|
|
if (attr != null) {
|
| 927 |
|
|
attr.next = cattrs;
|
| 928 |
|
|
cattrs = attr;
|
| 929 |
|
|
}
|
| 930 |
|
|
}
|
| 931 |
|
|
}
|
| 932 |
|
|
}
|
| 933 |
|
|
v += 6 + readInt(v + 2);
|
| 934 |
|
|
}
|
| 935 |
|
|
|
| 936 |
|
|
// 2nd phase: visits each instruction
|
| 937 |
|
|
v = codeStart;
|
| 938 |
|
|
Label l;
|
| 939 |
|
|
while (v < codeEnd) {
|
| 940 |
|
|
w = v - codeStart;
|
| 941 |
|
|
l = labels[w];
|
| 942 |
|
|
if (l != null) {
|
| 943 |
|
|
mv.visitLabel(l);
|
| 944 |
|
|
if (!skipDebug && l.line > 0) {
|
| 945 |
|
|
mv.visitLineNumber(l.line, l);
|
| 946 |
|
|
}
|
| 947 |
|
|
}
|
| 948 |
|
|
int opcode = b[v] & 0xFF;
|
| 949 |
|
|
switch (ClassWriter.TYPE[opcode]) {
|
| 950 |
|
|
case ClassWriter.NOARG_INSN:
|
| 951 |
|
|
mv.visitInsn(opcode);
|
| 952 |
|
|
v += 1;
|
| 953 |
|
|
break;
|
| 954 |
|
|
case ClassWriter.IMPLVAR_INSN:
|
| 955 |
|
|
if (opcode > Opcodes.ISTORE) {
|
| 956 |
|
|
opcode -= 59; // ISTORE_0
|
| 957 |
|
|
mv.visitVarInsn(Opcodes.ISTORE + (opcode >> 2),
|
| 958 |
|
|
opcode & 0x3);
|
| 959 |
|
|
} else {
|
| 960 |
|
|
opcode -= 26; // ILOAD_0
|
| 961 |
|
|
mv.visitVarInsn(Opcodes.ILOAD + (opcode >> 2),
|
| 962 |
|
|
opcode & 0x3);
|
| 963 |
|
|
}
|
| 964 |
|
|
v += 1;
|
| 965 |
|
|
break;
|
| 966 |
|
|
case ClassWriter.LABEL_INSN:
|
| 967 |
|
|
mv.visitJumpInsn(opcode, labels[w
|
| 968 |
|
|
+ readShort(v + 1)]);
|
| 969 |
|
|
v += 3;
|
| 970 |
|
|
break;
|
| 971 |
|
|
case ClassWriter.LABELW_INSN:
|
| 972 |
|
|
mv.visitJumpInsn(opcode - 33, labels[w
|
| 973 |
|
|
+ readInt(v + 1)]);
|
| 974 |
|
|
v += 5;
|
| 975 |
|
|
break;
|
| 976 |
|
|
case ClassWriter.WIDE_INSN:
|
| 977 |
|
|
opcode = b[v + 1] & 0xFF;
|
| 978 |
|
|
if (opcode == Opcodes.IINC) {
|
| 979 |
|
|
mv.visitIincInsn(readUnsignedShort(v + 2),
|
| 980 |
|
|
readShort(v + 4));
|
| 981 |
|
|
v += 6;
|
| 982 |
|
|
} else {
|
| 983 |
|
|
mv.visitVarInsn(opcode,
|
| 984 |
|
|
readUnsignedShort(v + 2));
|
| 985 |
|
|
v += 4;
|
| 986 |
|
|
}
|
| 987 |
|
|
break;
|
| 988 |
|
|
case ClassWriter.TABL_INSN:
|
| 989 |
|
|
// skips 0 to 3 padding bytes
|
| 990 |
|
|
v = v + 4 - (w & 3);
|
| 991 |
|
|
// reads instruction
|
| 992 |
|
|
label = w + readInt(v);
|
| 993 |
|
|
v += 4;
|
| 994 |
|
|
int min = readInt(v);
|
| 995 |
|
|
v += 4;
|
| 996 |
|
|
int max = readInt(v);
|
| 997 |
|
|
v += 4;
|
| 998 |
|
|
Label[] table = new Label[max - min + 1];
|
| 999 |
|
|
for (j = 0; j < table.length; ++j) {
|
| 1000 |
|
|
table[j] = labels[w + readInt(v)];
|
| 1001 |
|
|
v += 4;
|
| 1002 |
|
|
}
|
| 1003 |
|
|
mv.visitTableSwitchInsn(min,
|
| 1004 |
|
|
max,
|
| 1005 |
|
|
labels[label],
|
| 1006 |
|
|
table);
|
| 1007 |
|
|
break;
|
| 1008 |
|
|
case ClassWriter.LOOK_INSN:
|
| 1009 |
|
|
// skips 0 to 3 padding bytes
|
| 1010 |
|
|
v = v + 4 - (w & 3);
|
| 1011 |
|
|
// reads instruction
|
| 1012 |
|
|
label = w + readInt(v);
|
| 1013 |
|
|
v += 4;
|
| 1014 |
|
|
j = readInt(v);
|
| 1015 |
|
|
v += 4;
|
| 1016 |
|
|
int[] keys = new int[j];
|
| 1017 |
|
|
Label[] values = new Label[j];
|
| 1018 |
|
|
for (j = 0; j < keys.length; ++j) {
|
| 1019 |
|
|
keys[j] = readInt(v);
|
| 1020 |
|
|
v += 4;
|
| 1021 |
|
|
values[j] = labels[w + readInt(v)];
|
| 1022 |
|
|
v += 4;
|
| 1023 |
|
|
}
|
| 1024 |
|
|
mv.visitLookupSwitchInsn(labels[label],
|
| 1025 |
|
|
keys,
|
| 1026 |
|
|
values);
|
| 1027 |
|
|
break;
|
| 1028 |
|
|
case ClassWriter.VAR_INSN:
|
| 1029 |
|
|
mv.visitVarInsn(opcode, b[v + 1] & 0xFF);
|
| 1030 |
|
|
v += 2;
|
| 1031 |
|
|
break;
|
| 1032 |
|
|
case ClassWriter.SBYTE_INSN:
|
| 1033 |
|
|
mv.visitIntInsn(opcode, b[v + 1]);
|
| 1034 |
|
|
v += 2;
|
| 1035 |
|
|
break;
|
| 1036 |
|
|
case ClassWriter.SHORT_INSN:
|
| 1037 |
|
|
mv.visitIntInsn(opcode, readShort(v + 1));
|
| 1038 |
|
|
v += 3;
|
| 1039 |
|
|
break;
|
| 1040 |
|
|
case ClassWriter.LDC_INSN:
|
| 1041 |
|
|
mv.visitLdcInsn(readConst(b[v + 1] & 0xFF, c));
|
| 1042 |
|
|
v += 2;
|
| 1043 |
|
|
break;
|
| 1044 |
|
|
case ClassWriter.LDCW_INSN:
|
| 1045 |
|
|
mv.visitLdcInsn(readConst(readUnsignedShort(v + 1),
|
| 1046 |
|
|
c));
|
| 1047 |
|
|
v += 3;
|
| 1048 |
|
|
break;
|
| 1049 |
|
|
case ClassWriter.FIELDORMETH_INSN:
|
| 1050 |
|
|
case ClassWriter.ITFMETH_INSN:
|
| 1051 |
|
|
int cpIndex = items[readUnsignedShort(v + 1)];
|
| 1052 |
|
|
String iowner = readClass(cpIndex, c);
|
| 1053 |
|
|
cpIndex = items[readUnsignedShort(cpIndex + 2)];
|
| 1054 |
|
|
String iname = readUTF8(cpIndex, c);
|
| 1055 |
|
|
String idesc = readUTF8(cpIndex + 2, c);
|
| 1056 |
|
|
if (opcode < Opcodes.INVOKEVIRTUAL) {
|
| 1057 |
|
|
mv.visitFieldInsn(opcode, iowner, iname, idesc);
|
| 1058 |
|
|
} else {
|
| 1059 |
|
|
mv.visitMethodInsn(opcode, iowner, iname, idesc);
|
| 1060 |
|
|
}
|
| 1061 |
|
|
if (opcode == Opcodes.INVOKEINTERFACE) {
|
| 1062 |
|
|
v += 5;
|
| 1063 |
|
|
} else {
|
| 1064 |
|
|
v += 3;
|
| 1065 |
|
|
}
|
| 1066 |
|
|
break;
|
| 1067 |
|
|
case ClassWriter.TYPE_INSN:
|
| 1068 |
|
|
mv.visitTypeInsn(opcode, readClass(v + 1, c));
|
| 1069 |
|
|
v += 3;
|
| 1070 |
|
|
break;
|
| 1071 |
|
|
case ClassWriter.IINC_INSN:
|
| 1072 |
|
|
mv.visitIincInsn(b[v + 1] & 0xFF, b[v + 2]);
|
| 1073 |
|
|
v += 3;
|
| 1074 |
|
|
break;
|
| 1075 |
|
|
// case MANA_INSN:
|
| 1076 |
|
|
default:
|
| 1077 |
|
|
mv.visitMultiANewArrayInsn(readClass(v + 1, c),
|
| 1078 |
|
|
b[v + 3] & 0xFF);
|
| 1079 |
|
|
v += 4;
|
| 1080 |
|
|
break;
|
| 1081 |
|
|
}
|
| 1082 |
|
|
}
|
| 1083 |
|
|
l = labels[codeEnd - codeStart];
|
| 1084 |
|
|
if (l != null) {
|
| 1085 |
|
|
mv.visitLabel(l);
|
| 1086 |
|
|
}
|
| 1087 |
|
|
|
| 1088 |
|
|
// visits the local variable tables
|
| 1089 |
|
|
if (!skipDebug && varTable != 0) {
|
| 1090 |
|
|
int[] typeTable = null;
|
| 1091 |
|
|
if (varTypeTable != 0) {
|
| 1092 |
|
|
w = varTypeTable;
|
| 1093 |
|
|
k = readUnsignedShort(w) * 3;
|
| 1094 |
|
|
w += 2;
|
| 1095 |
|
|
typeTable = new int[k];
|
| 1096 |
|
|
while (k > 0) {
|
| 1097 |
|
|
typeTable[--k] = w + 6; // signature
|
| 1098 |
|
|
typeTable[--k] = readUnsignedShort(w + 8); // index
|
| 1099 |
|
|
typeTable[--k] = readUnsignedShort(w); // start
|
| 1100 |
|
|
w += 10;
|
| 1101 |
|
|
}
|
| 1102 |
|
|
}
|
| 1103 |
|
|
w = varTable;
|
| 1104 |
|
|
k = readUnsignedShort(w);
|
| 1105 |
|
|
w += 2;
|
| 1106 |
|
|
for (; k > 0; --k) {
|
| 1107 |
|
|
int start = readUnsignedShort(w);
|
| 1108 |
|
|
int length = readUnsignedShort(w + 2);
|
| 1109 |
|
|
int index = readUnsignedShort(w + 8);
|
| 1110 |
|
|
String vsignature = null;
|
| 1111 |
|
|
if (typeTable != null) {
|
| 1112 |
|
|
for (int a = 0; a < typeTable.length; a += 3) {
|
| 1113 |
|
|
if (typeTable[a] == start
|
| 1114 |
|
|
&& typeTable[a + 1] == index)
|
| 1115 |
|
|
{
|
| 1116 |
|
|
vsignature = readUTF8(typeTable[a + 2], c);
|
| 1117 |
|
|
break;
|
| 1118 |
|
|
}
|
| 1119 |
|
|
}
|
| 1120 |
|
|
}
|
| 1121 |
|
|
mv.visitLocalVariable(readUTF8(w + 4, c),
|
| 1122 |
|
|
readUTF8(w + 6, c),
|
| 1123 |
|
|
vsignature,
|
| 1124 |
|
|
labels[start],
|
| 1125 |
|
|
labels[start + length],
|
| 1126 |
|
|
index);
|
| 1127 |
|
|
w += 10;
|
| 1128 |
|
|
}
|
| 1129 |
|
|
}
|
| 1130 |
|
|
// visits the other attributes
|
| 1131 |
|
|
while (cattrs != null) {
|
| 1132 |
|
|
attr = cattrs.next;
|
| 1133 |
|
|
cattrs.next = null;
|
| 1134 |
|
|
mv.visitAttribute(cattrs);
|
| 1135 |
|
|
cattrs = attr;
|
| 1136 |
|
|
}
|
| 1137 |
|
|
// visits the max stack and max locals values
|
| 1138 |
|
|
mv.visitMaxs(maxStack, maxLocals);
|
| 1139 |
|
|
}
|
| 1140 |
|
|
|
| 1141 |
|
|
if (mv != null) {
|
| 1142 |
|
|
mv.visitEnd();
|
| 1143 |
|
|
}
|
| 1144 |
|
|
}
|
| 1145 |
|
|
|
| 1146 |
|
|
// visits the end of the class
|
| 1147 |
|
|
classVisitor.visitEnd();
|
| 1148 |
|
|
}
|
| 1149 |
|
|
|
| 1150 |
|
|
/**
|
| 1151 |
|
|
* Reads parameter annotations and makes the given visitor visit them.
|
| 1152 |
|
|
*
|
| 1153 |
|
|
* @param v start offset in {@link #b b} of the annotations to be read.
|
| 1154 |
|
|
* @param buf buffer to be used to call {@link #readUTF8 readUTF8},
|
| 1155 |
|
|
* {@link #readClass(int,char[]) readClass} or
|
| 1156 |
|
|
* {@link #readConst readConst}.
|
| 1157 |
|
|
* @param visible <tt>true</tt> if the annotations to be read are visible
|
| 1158 |
|
|
* at runtime.
|
| 1159 |
|
|
* @param mv the visitor that must visit the annotations.
|
| 1160 |
|
|
*/
|
| 1161 |
|
|
private void readParameterAnnotations(
|
| 1162 |
|
|
int v,
|
| 1163 |
|
|
final char[] buf,
|
| 1164 |
|
|
final boolean visible,
|
| 1165 |
|
|
final MethodVisitor mv)
|
| 1166 |
|
|
{
|
| 1167 |
|
|
int n = b[v++] & 0xFF;
|
| 1168 |
|
|
for (int i = 0; i < n; ++i) {
|
| 1169 |
|
|
int j = readUnsignedShort(v);
|
| 1170 |
|
|
v += 2;
|
| 1171 |
|
|
for (; j > 0; --j) {
|
| 1172 |
|
|
String desc = readUTF8(v, buf);
|
| 1173 |
|
|
v += 2;
|
| 1174 |
|
|
AnnotationVisitor av = mv.visitParameterAnnotation(i,
|
| 1175 |
|
|
desc,
|
| 1176 |
|
|
visible);
|
| 1177 |
|
|
v = readAnnotationValues(v, buf, av);
|
| 1178 |
|
|
}
|
| 1179 |
|
|
}
|
| 1180 |
|
|
}
|
| 1181 |
|
|
|
| 1182 |
|
|
/**
|
| 1183 |
|
|
* Reads the values of an annotation and makes the given visitor visit them.
|
| 1184 |
|
|
*
|
| 1185 |
|
|
* @param v the start offset in {@link #b b} of the values to be read
|
| 1186 |
|
|
* (including the unsigned short that gives the number of values).
|
| 1187 |
|
|
* @param buf buffer to be used to call {@link #readUTF8 readUTF8},
|
| 1188 |
|
|
* {@link #readClass(int,char[]) readClass} or
|
| 1189 |
|
|
* {@link #readConst readConst}.
|
| 1190 |
|
|
* @param av the visitor that must visit the values.
|
| 1191 |
|
|
* @return the end offset of the annotations values.
|
| 1192 |
|
|
*/
|
| 1193 |
|
|
private int readAnnotationValues(
|
| 1194 |
|
|
int v,
|
| 1195 |
|
|
final char[] buf,
|
| 1196 |
|
|
final AnnotationVisitor av)
|
| 1197 |
|
|
{
|
| 1198 |
|
|
int i = readUnsignedShort(v);
|
| 1199 |
|
|
v += 2;
|
| 1200 |
|
|
for (; i > 0; --i) {
|
| 1201 |
|
|
String name = readUTF8(v, buf);
|
| 1202 |
|
|
v += 2;
|
| 1203 |
|
|
v = readAnnotationValue(v, buf, name, av);
|
| 1204 |
|
|
}
|
| 1205 |
|
|
av.visitEnd();
|
| 1206 |
|
|
return v;
|
| 1207 |
|
|
}
|
| 1208 |
|
|
|
| 1209 |
|
|
/**
|
| 1210 |
|
|
* Reads a value of an annotation and makes the given visitor visit it.
|
| 1211 |
|
|
*
|
| 1212 |
|
|
* @param v the start offset in {@link #b b} of the value to be read (<i>not
|
| 1213 |
|
|
* including the value name constant pool index</i>).
|
| 1214 |
|
|
* @param buf buffer to be used to call {@link #readUTF8 readUTF8},
|
| 1215 |
|
|
* {@link #readClass(int,char[]) readClass} or
|
| 1216 |
|
|
* {@link #readConst readConst}.
|
| 1217 |
|
|
* @param name the name of the value to be read.
|
| 1218 |
|
|
* @param av the visitor that must visit the value.
|
| 1219 |
|
|
* @return the end offset of the annotation value.
|
| 1220 |
|
|
*/
|
| 1221 |
|
|
private int readAnnotationValue(
|
| 1222 |
|
|
int v,
|
| 1223 |
|
|
final char[] buf,
|
| 1224 |
|
|
final String name,
|
| 1225 |
|
|
final AnnotationVisitor av)
|
| 1226 |
|
|
{
|
| 1227 |
|
|
int i;
|
| 1228 |
|
|
switch (readByte(v++)) {
|
| 1229 |
|
|
case 'I': // pointer to CONSTANT_Integer
|
| 1230 |
|
|
case 'J': // pointer to CONSTANT_Long
|
| 1231 |
|
|
case 'F': // pointer to CONSTANT_Float
|
| 1232 |
|
|
case 'D': // pointer to CONSTANT_Double
|
| 1233 |
|
|
av.visit(name, readConst(readUnsignedShort(v), buf));
|
| 1234 |
|
|
v += 2;
|
| 1235 |
|
|
break;
|
| 1236 |
|
|
case 'B': // pointer to CONSTANT_Byte
|
| 1237 |
|
|
av.visit(name,
|
| 1238 |
|
|
new Byte((byte) readInt(items[readUnsignedShort(v)])));
|
| 1239 |
|
|
v += 2;
|
| 1240 |
|
|
break;
|
| 1241 |
|
|
case 'Z': // pointer to CONSTANT_Boolean
|
| 1242 |
|
|
boolean b = readInt(items[readUnsignedShort(v)]) == 0;
|
| 1243 |
|
|
av.visit(name, b ? Boolean.FALSE : Boolean.TRUE);
|
| 1244 |
|
|
v += 2;
|
| 1245 |
|
|
break;
|
| 1246 |
|
|
case 'S': // pointer to CONSTANT_Short
|
| 1247 |
|
|
av.visit(name,
|
| 1248 |
|
|
new Short((short) readInt(items[readUnsignedShort(v)])));
|
| 1249 |
|
|
v += 2;
|
| 1250 |
|
|
break;
|
| 1251 |
|
|
case 'C': // pointer to CONSTANT_Char
|
| 1252 |
|
|
av.visit(name,
|
| 1253 |
|
|
new Character((char) readInt(items[readUnsignedShort(v)])));
|
| 1254 |
|
|
v += 2;
|
| 1255 |
|
|
break;
|
| 1256 |
|
|
case 's': // pointer to CONSTANT_Utf8
|
| 1257 |
|
|
av.visit(name, readUTF8(v, buf));
|
| 1258 |
|
|
v += 2;
|
| 1259 |
|
|
break;
|
| 1260 |
|
|
case 'e': // enum_const_value
|
| 1261 |
|
|
av.visitEnum(name, readUTF8(v, buf), readUTF8(v + 2, buf));
|
| 1262 |
|
|
v += 4;
|
| 1263 |
|
|
break;
|
| 1264 |
|
|
case 'c': // class_info
|
| 1265 |
|
|
av.visit(name, Type.getType(readUTF8(v, buf)));
|
| 1266 |
|
|
v += 2;
|
| 1267 |
|
|
break;
|
| 1268 |
|
|
case '@': // annotation_value
|
| 1269 |
|
|
String desc = readUTF8(v, buf);
|
| 1270 |
|
|
v += 2;
|
| 1271 |
|
|
v = readAnnotationValues(v, buf, av.visitAnnotation(name, desc));
|
| 1272 |
|
|
break;
|
| 1273 |
|
|
case '[': // array_value
|
| 1274 |
|
|
int size = readUnsignedShort(v);
|
| 1275 |
|
|
v += 2;
|
| 1276 |
|
|
if (size == 0) {
|
| 1277 |
|
|
av.visitArray(name).visitEnd();
|
| 1278 |
|
|
return v;
|
| 1279 |
|
|
}
|
| 1280 |
|
|
switch (readByte(v++)) {
|
| 1281 |
|
|
case 'B':
|
| 1282 |
|
|
byte[] bv = new byte[size];
|
| 1283 |
|
|
for (i = 0; i < size; i++) {
|
| 1284 |
|
|
bv[i] = (byte) readInt(items[readUnsignedShort(v)]);
|
| 1285 |
|
|
v += 3;
|
| 1286 |
|
|
}
|
| 1287 |
|
|
av.visit(name, bv);
|
| 1288 |
|
|
--v;
|
| 1289 |
|
|
break;
|
| 1290 |
|
|
case 'Z':
|
| 1291 |
|
|
boolean[] zv = new boolean[size];
|
| 1292 |
|
|
for (i = 0; i < size; i++) {
|
| 1293 |
|
|
zv[i] = readInt(items[readUnsignedShort(v)]) != 0;
|
| 1294 |
|
|
v += 3;
|
| 1295 |
|
|
}
|
| 1296 |
|
|
av.visit(name, zv);
|
| 1297 |
|
|
--v;
|
| 1298 |
|
|
break;
|
| 1299 |
|
|
case 'S':
|
| 1300 |
|
|
short[] sv = new short[size];
|
| 1301 |
|
|
for (i = 0; i < size; i++) {
|
| 1302 |
|
|
sv[i] = (short) readInt(items[readUnsignedShort(v)]);
|
| 1303 |
|
|
v += 3;
|
| 1304 |
|
|
}
|
| 1305 |
|
|
av.visit(name, sv);
|
| 1306 |
|
|
--v;
|
| 1307 |
|
|
break;
|
| 1308 |
|
|
case 'C':
|
| 1309 |
|
|
char[] cv = new char[size];
|
| 1310 |
|
|
for (i = 0; i < size; i++) {
|
| 1311 |
|
|
cv[i] = (char) readInt(items[readUnsignedShort(v)]);
|
| 1312 |
|
|
v += 3;
|
| 1313 |
|
|
}
|
| 1314 |
|
|
av.visit(name, cv);
|
| 1315 |
|
|
--v;
|
| 1316 |
|
|
break;
|
| 1317 |
|
|
case 'I':
|
| 1318 |
|
|
int[] iv = new int[size];
|
| 1319 |
|
|
for (i = 0; i < size; i++) {
|
| 1320 |
|
|
iv[i] = readInt(items[readUnsignedShort(v)]);
|
| 1321 |
|
|
v += 3;
|
| 1322 |
|
|
}
|
| 1323 |
|
|
av.visit(name, iv);
|
| 1324 |
|
|
--v;
|
| 1325 |
|
|
break;
|
| 1326 |
|
|
case 'J':
|
| 1327 |
|
|
long[] lv = new long[size];
|
| 1328 |
|
|
for (i = 0; i < size; i++) {
|
| 1329 |
|
|
lv[i] = readLong(items[readUnsignedShort(v)]);
|
| 1330 |
|
|
v += 3;
|
| 1331 |
|
|
}
|
| 1332 |
|
|
av.visit(name, lv);
|
| 1333 |
|
|
--v;
|
| 1334 |
|
|
break;
|
| 1335 |
|
|
case 'F':
|
| 1336 |
|
|
float[] fv = new float[size];
|
| 1337 |
|
|
for (i = 0; i < size; i++) {
|
| 1338 |
|
|
fv[i] = Float.intBitsToFloat(readInt(items[readUnsignedShort(v)]));
|
| 1339 |
|
|
v += 3;
|
| 1340 |
|
|
}
|
| 1341 |
|
|
av.visit(name, fv);
|
| 1342 |
|
|
--v;
|
| 1343 |
|
|
break;
|
| 1344 |
|
|
case 'D':
|
| 1345 |
|
|
double[] dv = new double[size];
|
| 1346 |
|
|
for (i = 0; i < size; i++) {
|
| 1347 |
|
|
dv[i] = Double.longBitsToDouble(readLong(items[readUnsignedShort(v)]));
|
| 1348 |
|
|
v += 3;
|
| 1349 |
|
|
}
|
| 1350 |
|
|
av.visit(name, dv);
|
| 1351 |
|
|
--v;
|
| 1352 |
|
|
break;
|
| 1353 |
|
|
default:
|
| 1354 |
|
|
v--;
|
| 1355 |
|
|
AnnotationVisitor aav = av.visitArray(name);
|
| 1356 |
|
|
for (i = size; i > 0; --i) {
|
| 1357 |
|
|
v = readAnnotationValue(v, buf, null, aav);
|
| 1358 |
|
|
}
|
| 1359 |
|
|
aav.visitEnd();
|
| 1360 |
|
|
}
|
| 1361 |
|
|
}
|
| 1362 |
|
|
return v;
|
| 1363 |
|
|
}
|
| 1364 |
|
|
|
| 1365 |
|
|
/**
|
| 1366 |
|
|
* Reads an attribute in {@link #b b}.
|
| 1367 |
|
|
*
|
| 1368 |
|
|
* @param attrs prototypes of the attributes that must be parsed during the
|
| 1369 |
|
|
* visit of the class. Any attribute whose type is not equal to the
|
| 1370 |
|
|
* type of one the prototypes is ignored (i.e. an empty
|
| 1371 |
|
|
* {@link Attribute} instance is returned).
|
| 1372 |
|
|
* @param type the type of the attribute.
|
| 1373 |
|
|
* @param off index of the first byte of the attribute's content in
|
| 1374 |
|
|
* {@link #b b}. The 6 attribute header bytes, containing the type
|
| 1375 |
|
|
* and the length of the attribute, are not taken into account here
|
| 1376 |
|
|
* (they have already been read).
|
| 1377 |
|
|
* @param len the length of the attribute's content.
|
| 1378 |
|
|
* @param buf buffer to be used to call {@link #readUTF8 readUTF8},
|
| 1379 |
|
|
* {@link #readClass(int,char[]) readClass} or
|
| 1380 |
|
|
* {@link #readConst readConst}.
|
| 1381 |
|
|
* @param codeOff index of the first byte of code's attribute content in
|
| 1382 |
|
|
* {@link #b b}, or -1 if the attribute to be read is not a code
|
| 1383 |
|
|
* attribute. The 6 attribute header bytes, containing the type and
|
| 1384 |
|
|
* the length of the attribute, are not taken into account here.
|
| 1385 |
|
|
* @param labels the labels of the method's code, or <tt>null</tt> if the
|
| 1386 |
|
|
* attribute to be read is not a code attribute.
|
| 1387 |
|
|
* @return the attribute that has been read, or <tt>null</tt> to skip this
|
| 1388 |
|
|
* attribute.
|
| 1389 |
|
|
*/
|
| 1390 |
|
|
private Attribute readAttribute(
|
| 1391 |
|
|
final Attribute[] attrs,
|
| 1392 |
|
|
final String type,
|
| 1393 |
|
|
final int off,
|
| 1394 |
|
|
final int len,
|
| 1395 |
|
|
final char[] buf,
|
| 1396 |
|
|
final int codeOff,
|
| 1397 |
|
|
final Label[] labels)
|
| 1398 |
|
|
{
|
| 1399 |
|
|
for (int i = 0; i < attrs.length; ++i) {
|
| 1400 |
|
|
if (attrs[i].type.equals(type)) {
|
| 1401 |
|
|
return attrs[i].read(this, off, len, buf, codeOff, labels);
|
| 1402 |
|
|
}
|
| 1403 |
|
|
}
|
| 1404 |
|
|
return new Attribute(type).read(this, off, len, null, -1, null);
|
| 1405 |
|
|
}
|
| 1406 |
|
|
|
| 1407 |
|
|
// ------------------------------------------------------------------------
|
| 1408 |
|
|
// Utility methods: low level parsing
|
| 1409 |
|
|
// ------------------------------------------------------------------------
|
| 1410 |
|
|
|
| 1411 |
|
|
/**
|
| 1412 |
|
|
* Returns the start index of the constant pool item in {@link #b b}, plus
|
| 1413 |
|
|
* one. <i>This method is intended for {@link Attribute} sub classes, and is
|
| 1414 |
|
|
* normally not needed by class generators or adapters.</i>
|
| 1415 |
|
|
*
|
| 1416 |
|
|
* @param item the index a constant pool item.
|
| 1417 |
|
|
* @return the start index of the constant pool item in {@link #b b}, plus
|
| 1418 |
|
|
* one.
|
| 1419 |
|
|
*/
|
| 1420 |
|
|
public int getItem(final int item) {
|
| 1421 |
|
|
return items[item];
|
| 1422 |
|
|
}
|
| 1423 |
|
|
|
| 1424 |
|
|
/**
|
| 1425 |
|
|
* Reads a byte value in {@link #b b}. <i>This method is intended for
|
| 1426 |
|
|
* {@link Attribute} sub classes, and is normally not needed by class
|
| 1427 |
|
|
* generators or adapters.</i>
|
| 1428 |
|
|
*
|
| 1429 |
|
|
* @param index the start index of the value to be read in {@link #b b}.
|
| 1430 |
|
|
* @return the read value.
|
| 1431 |
|
|
*/
|
| 1432 |
|
|
public int readByte(final int index) {
|
| 1433 |
|
|
return b[index] & 0xFF;
|
| 1434 |
|
|
}
|
| 1435 |
|
|
|
| 1436 |
|
|
/**
|
| 1437 |
|
|
* Reads an unsigned short value in {@link #b b}. <i>This method is
|
| 1438 |
|
|
* intended for {@link Attribute} sub classes, and is normally not needed by
|
| 1439 |
|
|
* class generators or adapters.</i>
|
| 1440 |
|
|
*
|
| 1441 |
|
|
* @param index the start index of the value to be read in {@link #b b}.
|
| 1442 |
|
|
* @return the read value.
|
| 1443 |
|
|
*/
|
| 1444 |
|
|
public int readUnsignedShort(final int index) {
|
| 1445 |
|
|
byte[] b = this.b;
|
| 1446 |
|
|
return ((b[index] & 0xFF) << 8) | (b[index + 1] & 0xFF);
|
| 1447 |
|
|
}
|
| 1448 |
|
|
|
| 1449 |
|
|
/**
|
| 1450 |
|
|
* Reads a signed short value in {@link #b b}. <i>This method is intended
|
| 1451 |
|
|
* for {@link Attribute} sub classes, and is normally not needed by class
|
| 1452 |
|
|
* generators or adapters.</i>
|
| 1453 |
|
|
*
|
| 1454 |
|
|
* @param index the start index of the value to be read in {@link #b b}.
|
| 1455 |
|
|
* @return the read value.
|
| 1456 |
|
|
*/
|
| 1457 |
|
|
public short readShort(final int index) {
|
| 1458 |
|
|
byte[] b = this.b;
|
| 1459 |
|
|
return (short) (((b[index] & 0xFF) << 8) | (b[index + 1] & 0xFF));
|
| 1460 |
|
|
}
|
| 1461 |
|
|
|
| 1462 |
|
|
/**
|
| 1463 |
|
|
* Reads a signed int value in {@link #b b}. <i>This method is intended for
|
| 1464 |
|
|
* {@link Attribute} sub classes, and is normally not needed by class
|
| 1465 |
|
|
* generators or adapters.</i>
|
| 1466 |
|
|
*
|
| 1467 |
|
|
* @param index the start index of the value to be read in {@link #b b}.
|
| 1468 |
|
|
* @return the read value.
|
| 1469 |
|
|
*/
|
| 1470 |
|
|
public int readInt(final int index) {
|
| 1471 |
|
|
byte[] b = this.b;
|
| 1472 |
|
|
return ((b[index] & 0xFF) << 24) | ((b[index + 1] & 0xFF) << 16)
|
| 1473 |
|
|
| ((b[index + 2] & 0xFF) << 8) | (b[index + 3] & 0xFF);
|
| 1474 |
|
|
}
|
| 1475 |
|
|
|
| 1476 |
|
|
/**
|
| 1477 |
|
|
* Reads a signed long value in {@link #b b}. <i>This method is intended
|
| 1478 |
|
|
* for {@link Attribute} sub classes, and is normally not needed by class
|
| 1479 |
|
|
* generators or adapters.</i>
|
| 1480 |
|
|
*
|
| 1481 |
|
|
* @param index the start index of the value to be read in {@link #b b}.
|
| 1482 |
|
|
* @return the read value.
|
| 1483 |
|
|
*/
|
| 1484 |
|
|
public long readLong(final int index) {
|
| 1485 |
|
|
long l1 = readInt(index);
|
| 1486 |
|
|
long l0 = readInt(index + 4) & 0xFFFFFFFFL;
|
| 1487 |
|
|
return (l1 << 32) | l0;
|
| 1488 |
|
|
}
|
| 1489 |
|
|
|
| 1490 |
|
|
/**
|
| 1491 |
|
|
* Reads an UTF8 string constant pool item in {@link #b b}. <i>This method
|
| 1492 |
|
|
* is intended for {@link Attribute} sub classes, and is normally not needed
|
| 1493 |
|
|
* by class generators or adapters.</i>
|
| 1494 |
|
|
*
|
| 1495 |
|
|
* @param index the start index of an unsigned short value in {@link #b b},
|
| 1496 |
|
|
* whose value is the index of an UTF8 constant pool item.
|
| 1497 |
|
|
* @param buf buffer to be used to read the item. This buffer must be
|
| 1498 |
|
|
* sufficiently large. It is not automatically resized.
|
| 1499 |
|
|
* @return the String corresponding to the specified UTF8 item.
|
| 1500 |
|
|
*/
|
| 1501 |
|
|
public String readUTF8(int index, final char[] buf) {
|
| 1502 |
|
|
int item = readUnsignedShort(index);
|
| 1503 |
|
|
String s = strings[item];
|
| 1504 |
|
|
if (s != null) {
|
| 1505 |
|
|
return s;
|
| 1506 |
|
|
}
|
| 1507 |
|
|
index = items[item];
|
| 1508 |
|
|
return strings[item] = readUTF(index + 2, readUnsignedShort(index), buf);
|
| 1509 |
|
|
}
|
| 1510 |
|
|
|
| 1511 |
|
|
/**
|
| 1512 |
|
|
* Reads UTF8 string in {@link #b b}.
|
| 1513 |
|
|
*
|
| 1514 |
|
|
* @param index start offset of the UTF8 string to be read.
|
| 1515 |
|
|
* @param utfLen length of the UTF8 string to be read.
|
| 1516 |
|
|
* @param buf buffer to be used to read the string. This buffer must be
|
| 1517 |
|
|
* sufficiently large. It is not automatically resized.
|
| 1518 |
|
|
* @return the String corresponding to the specified UTF8 string.
|
| 1519 |
|
|
*/
|
| 1520 |
|
|
private String readUTF(int index, int utfLen, char[] buf) {
|
| 1521 |
|
|
int endIndex = index + utfLen;
|
| 1522 |
|
|
byte[] b = this.b;
|
| 1523 |
|
|
int strLen = 0;
|
| 1524 |
|
|
int c, d, e;
|
| 1525 |
|
|
while (index < endIndex) {
|
| 1526 |
|
|
c = b[index++] & 0xFF;
|
| 1527 |
|
|
switch (c >> 4) {
|
| 1528 |
|
|
case 0:
|
| 1529 |
|
|
case 1:
|
| 1530 |
|
|
case 2:
|
| 1531 |
|
|
case 3:
|
| 1532 |
|
|
case 4:
|
| 1533 |
|
|
case 5:
|
| 1534 |
|
|
case 6:
|
| 1535 |
|
|
case 7:
|
| 1536 |
|
|
// 0xxxxxxx
|
| 1537 |
|
|
buf[strLen++] = (char) c;
|
| 1538 |
|
|
break;
|
| 1539 |
|
|
case 12:
|
| 1540 |
|
|
case 13:
|
| 1541 |
|
|
// 110x xxxx 10xx xxxx
|
| 1542 |
|
|
d = b[index++];
|
| 1543 |
|
|
buf[strLen++] = (char) (((c & 0x1F) << 6) | (d & 0x3F));
|
| 1544 |
|
|
break;
|
| 1545 |
|
|
default:
|
| 1546 |
|
|
// 1110 xxxx 10xx xxxx 10xx xxxx
|
| 1547 |
|
|
d = b[index++];
|
| 1548 |
|
|
e = b[index++];
|
| 1549 |
|
|
buf[strLen++] = (char) (((c & 0x0F) << 12)
|
| 1550 |
|
|
| ((d & 0x3F) << 6) | (e & 0x3F));
|
| 1551 |
|
|
break;
|
| 1552 |
|
|
}
|
| 1553 |
|
|
}
|
| 1554 |
|
|
return new String(buf, 0, strLen);
|
| 1555 |
|
|
}
|
| 1556 |
|
|
|
| 1557 |
|
|
/**
|
| 1558 |
|
|
* Reads a class constant pool item in {@link #b b}. <i>This method is
|
| 1559 |
|
|
* intended for {@link Attribute} sub classes, and is normally not needed by
|
| 1560 |
|
|
* class generators or adapters.</i>
|
| 1561 |
|
|
*
|
| 1562 |
|
|
* @param index the start index of an unsigned short value in {@link #b b},
|
| 1563 |
|
|
* whose value is the index of a class constant pool item.
|
| 1564 |
|
|
* @param buf buffer to be used to read the item. This buffer must be
|
| 1565 |
|
|
* sufficiently large. It is not automatically resized.
|
| 1566 |
|
|
* @return the String corresponding to the specified class item.
|
| 1567 |
|
|
*/
|
| 1568 |
|
|
public String readClass(final int index, final char[] buf) {
|
| 1569 |
|
|
// computes the start index of the CONSTANT_Class item in b
|
| 1570 |
|
|
// and reads the CONSTANT_Utf8 item designated by
|
| 1571 |
|
|
// the first two bytes of this CONSTANT_Class item
|
| 1572 |
|
|
return readUTF8(items[readUnsignedShort(index)], buf);
|
| 1573 |
|
|
}
|
| 1574 |
|
|
|
| 1575 |
|
|
/**
|
| 1576 |
|
|
* Reads a numeric or string constant pool item in {@link #b b}. <i>This
|
| 1577 |
|
|
* method is intended for {@link Attribute} sub classes, and is normally not
|
| 1578 |
|
|
* needed by class generators or adapters.</i>
|
| 1579 |
|
|
*
|
| 1580 |
|
|
* @param item the index of a constant pool item.
|
| 1581 |
|
|
* @param buf buffer to be used to read the item. This buffer must be
|
| 1582 |
|
|
* sufficiently large. It is not automatically resized.
|
| 1583 |
|
|
* @return the {@link Integer}, {@link Float}, {@link Long},
|
| 1584 |
|
|
* {@link Double}, {@link String} or {@link Type} corresponding to
|
| 1585 |
|
|
* the given constant pool item.
|
| 1586 |
|
|
*/
|
| 1587 |
|
|
public Object readConst(final int item, final char[] buf) {
|
| 1588 |
|
|
int index = items[item];
|
| 1589 |
|
|
switch (b[index - 1]) {
|
| 1590 |
|
|
case ClassWriter.INT:
|
| 1591 |
|
|
return new Integer(readInt(index));
|
| 1592 |
|
|
case ClassWriter.FLOAT:
|
| 1593 |
|
|
return new Float(Float.intBitsToFloat(readInt(index)));
|
| 1594 |
|
|
case ClassWriter.LONG:
|
| 1595 |
|
|
return new Long(readLong(index));
|
| 1596 |
|
|
case ClassWriter.DOUBLE:
|
| 1597 |
|
|
return new Double(Double.longBitsToDouble(readLong(index)));
|
| 1598 |
|
|
case ClassWriter.CLASS:
|
| 1599 |
|
|
String s = readUTF8(index, buf);
|
| 1600 |
|
|
return Type.getType(s.charAt(0) == '[' ? s : "L" + s + ";");
|
| 1601 |
|
|
// case ClassWriter.STR:
|
| 1602 |
|
|
default:
|
| 1603 |
|
|
return readUTF8(index, buf);
|
| 1604 |
|
|
}
|
| 1605 |
|
|
}
|
| 1606 |
|
|
}
|
