/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000-2007 INRIA, France Telecom
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.nutz.repo.org.objectweb.asm;
//import java.io.InputStream;
//import java.io.IOException;
/**
* A Java class parser to make a {@link ClassVisitor} visit an existing class.
* This class parses a byte array conforming to the Java class file format and
* calls the appropriate visit methods of a given class visitor for each field,
* method and bytecode instruction encountered.
*
* @author Eric Bruneton
* @author Eugene Kuleshov
*/
public class ClassReader {
/**
* True to enable signatures support.
*/
static final boolean SIGNATURES = true;
// /**
// * True to enable annotations support.
// */
// static final boolean ANNOTATIONS = false;
/**
* True to enable stack map frames support.
*/
static final boolean FRAMES = true;
// /**
// * True to enable bytecode writing support.
// */
// static final boolean WRITER = true;
/**
* True to enable JSR_W and GOTO_W support.
*/
static final boolean RESIZE = true;
// /**
// * Flag to skip method code. If this class is set <code>CODE</code>
// * attribute won't be visited. This can be used, for example, to retrieve
// * annotations for methods and method parameters.
// */
// public static final int SKIP_CODE = 1;
// /**
// * Flag to skip the debug information in the class. If this flag is set the
// * debug information of the class is not visited, i.e. the
// * {@link MethodVisitor#visitLocalVariable visitLocalVariable} and
// * {@link MethodVisitor#visitLineNumber visitLineNumber} methods will not be
// * called.
// */
// public static final int SKIP_DEBUG = 2;
// /**
// * Flag to skip the stack map frames in the class. If this flag is set the
// * stack map frames of the class is not visited, i.e. the
// * {@link MethodVisitor#visitFrame visitFrame} method will not be called.
// * This flag is useful when the {@link ClassWriter#COMPUTE_FRAMES} option is
// * used: it avoids visiting frames that will be ignored and recomputed from
// * scratch in the class writer.
// */
// public static final int SKIP_FRAMES = 4;
// /**
// * Flag to expand the stack map frames. By default stack map frames are
// * visited in their original format (i.e. "expanded" for classes whose
// * version is less than V1_6, and "compressed" for the other classes). If
// * this flag is set, stack map frames are always visited in expanded format
// * (this option adds a decompression/recompression step in ClassReader and
// * ClassWriter which degrades performances quite a lot).
// */
// public static final int EXPAND_FRAMES = 8;
// /**
// * The class to be parsed. <i>The content of this array must not be
// * modified. This field is intended for {@link Attribute} sub classes, and
// * is normally not needed by class generators or adapters.</i>
// */
// public final byte[] b;
//
// /**
// * The start index of each constant pool item in {@link #b b}, plus one.
// * The one byte offset skips the constant pool item tag that indicates its
// * type.
// */
// private final int[] items;
//
// /**
// * The String objects corresponding to the CONSTANT_Utf8 items. This cache
// * avoids multiple parsing of a given CONSTANT_Utf8 constant pool item,
// * which GREATLY improves performances (by a factor 2 to 3). This caching
// * strategy could be extended to all constant pool items, but its benefit
// * would not be so great for these items (because they are much less
// * expensive to parse than CONSTANT_Utf8 items).
// */
// private final String[] strings;
//
// /**
// * Maximum length of the strings contained in the constant pool of the
// * class.
// */
// private final int maxStringLength;
//
// /**
// * Start index of the class header information (access, name...) in
// * {@link #b b}.
// */
// public final int header;
//
// // ------------------------------------------------------------------------
// // Constructors
// // ------------------------------------------------------------------------
//
// /**
// * Constructs a new {@link ClassReader} object.
// *
// * @param b the bytecode of the class to be read.
// */
// public ClassReader(final byte[] b) {
// this(b, 0, b.length);
// }
//
// /**
// * Constructs a new {@link ClassReader} object.
// *
// * @param b the bytecode of the class to be read.
// * @param off the start offset of the class data.
// * @param len the length of the class data.
// */
// public ClassReader(final byte[] b, final int off, final int len) {
// this.b = b;
// // parses the constant pool
// items = new int[readUnsignedShort(off + 8)];
// int n = items.length;
// strings = new String[n];
// int max = 0;
// int index = off + 10;
// for (int i = 1; i < n; ++i) {
// items[i] = index + 1;
// int size;
// switch (b[index]) {
// case ClassWriter.FIELD:
// case ClassWriter.METH:
// case ClassWriter.IMETH:
// case ClassWriter.INT:
// case ClassWriter.FLOAT:
// case ClassWriter.NAME_TYPE:
// size = 5;
// break;
// case ClassWriter.LONG:
// case ClassWriter.DOUBLE:
// size = 9;
// ++i;
// break;
// case ClassWriter.UTF8:
// size = 3 + readUnsignedShort(index + 1);
// if (size > max) {
// max = size;
// }
// break;
// // case ClassWriter.CLASS:
// // case ClassWriter.STR:
// default:
// size = 3;
// break;
// }
// index += size;
// }
// maxStringLength = max;
// // the class header information starts just after the constant pool
// header = index;
// }
//
// /**
// * Returns the class's access flags (see {@link Opcodes}). This value may
// * not reflect Deprecated and Synthetic flags when bytecode is before 1.5
// * and those flags are represented by attributes.
// *
// * @return the class access flags
// *
// * @see ClassVisitor#visit(int, int, String, String, String, String[])
// */
// public int getAccess() {
// return readUnsignedShort(header);
// }
//
// /**
// * Returns the internal name of the class (see
// * {@link Type#getInternalName() getInternalName}).
// *
// * @return the internal class name
// *
// * @see ClassVisitor#visit(int, int, String, String, String, String[])
// */
// public String getClassName() {
// return readClass(header + 2, new char[maxStringLength]);
// }
//
// /**
// * Returns the internal of name of the super class (see
// * {@link Type#getInternalName() getInternalName}). For interfaces, the
// * super class is {@link Object}.
// *
// * @return the internal name of super class, or <tt>null</tt> for
// * {@link Object} class.
// *
// * @see ClassVisitor#visit(int, int, String, String, String, String[])
// */
// public String getSuperName() {
// int n = items[readUnsignedShort(header + 4)];
// return n == 0 ? null : readUTF8(n, new char[maxStringLength]);
// }
//
// /**
// * Returns the internal names of the class's interfaces (see
// * {@link Type#getInternalName() getInternalName}).
// *
// * @return the array of internal names for all implemented interfaces or
// * <tt>null</tt>.
// *
// * @see ClassVisitor#visit(int, int, String, String, String, String[])
// */
// public String[] getInterfaces() {
// int index = header + 6;
// int n = readUnsignedShort(index);
// String[] interfaces = new String[n];
// if (n > 0) {
// char[] buf = new char[maxStringLength];
// for (int i = 0; i < n; ++i) {
// index += 2;
// interfaces[i] = readClass(index, buf);
// }
// }
// return interfaces;
// }
//
// /**
// * Copies the constant pool data into the given {@link ClassWriter}. Should
// * be called before the {@link #accept(ClassVisitor,int)} method.
// *
// * @param classWriter the {@link ClassWriter} to copy constant pool into.
// */
// void copyPool(final ClassWriter classWriter) {
// char[] buf = new char[maxStringLength];
// int ll = items.length;
// Item[] items2 = new Item[ll];
// for (int i = 1; i < ll; i++) {
// int index = items[i];
// int tag = b[index - 1];
// Item item = new Item(i);
// int nameType;
// switch (tag) {
// case ClassWriter.FIELD:
// case ClassWriter.METH:
// case ClassWriter.IMETH:
// nameType = items[readUnsignedShort(index + 2)];
// item.set(tag,
// readClass(index, buf),
// readUTF8(nameType, buf),
// readUTF8(nameType + 2, buf));
// break;
//
// case ClassWriter.INT:
// item.set(readInt(index));
// break;
//
// case ClassWriter.FLOAT:
// item.set(Float.intBitsToFloat(readInt(index)));
// break;
//
// case ClassWriter.NAME_TYPE:
// item.set(tag,
// readUTF8(index, buf),
// readUTF8(index + 2, buf),
// null);
// break;
//
// case ClassWriter.LONG:
// item.set(readLong(index));
// ++i;
// break;
//
// case ClassWriter.DOUBLE:
// item.set(Double.longBitsToDouble(readLong(index)));
// ++i;
// break;
//
// case ClassWriter.UTF8: {
// String s = strings[i];
// if (s == null) {
// index = items[i];
// s = strings[i] = readUTF(index + 2,
// readUnsignedShort(index),
// buf);
// }
// item.set(tag, s, null, null);
// }
// break;
//
// // case ClassWriter.STR:
// // case ClassWriter.CLASS:
// default:
// item.set(tag, readUTF8(index, buf), null, null);
// break;
// }
//
// int index2 = item.hashCode % items2.length;
// item.next = items2[index2];
// items2[index2] = item;
// }
//
// int off = items[1] - 1;
// classWriter.pool.putByteArray(b, off, header - off);
// classWriter.items = items2;
// classWriter.threshold = (int) (0.75d * ll);
// classWriter.index = ll;
// }
//
// /**
// * Constructs a new {@link ClassReader} object.
// *
// * @param is an input stream from which to read the class.
// * @throws IOException if a problem occurs during reading.
// */
// public ClassReader(final InputStream is) throws IOException {
// this(readClass(is));
// }
//
// /**
// * Constructs a new {@link ClassReader} object.
// *
// * @param name the fully qualified name of the class to be read.
// * @throws IOException if an exception occurs during reading.
// */
// public ClassReader(final String name) throws IOException {
// this(ClassLoader.getSystemResourceAsStream(name.replace('.', '/')
// + ".class"));
// }
//
// /**
// * Reads the bytecode of a class.
// *
// * @param is an input stream from which to read the class.
// * @return the bytecode read from the given input stream.
// * @throws IOException if a problem occurs during reading.
// */
// private static byte[] readClass(final InputStream is) throws IOException {
// if (is == null) {
// throw new IOException("Class not found");
// }
// byte[] b = new byte[is.available()];
// int len = 0;
// while (true) {
// int n = is.read(b, len, b.length - len);
// if (n == -1) {
// if (len < b.length) {
// byte[] c = new byte[len];
// System.arraycopy(b, 0, c, 0, len);
// b = c;
// }
// return b;
// }
// len += n;
// if (len == b.length) {
// int last = is.read();
// if (last < 0) {
// return b;
// }
// byte[] c = new byte[b.length + 1000];
// System.arraycopy(b, 0, c, 0, len);
// c[len++] = (byte) last;
// b = c;
// }
// }
// }
//
// // ------------------------------------------------------------------------
// // Public methods
// // ------------------------------------------------------------------------
//
// /**
// * Makes the given visitor visit the Java class of this {@link ClassReader}.
// * This class is the one specified in the constructor (see
// * {@link #ClassReader(byte[]) ClassReader}).
// *
// * @param classVisitor the visitor that must visit this class.
// * @param flags option flags that can be used to modify the default behavior
// * of this class. See {@link #SKIP_DEBUG}, {@link #EXPAND_FRAMES},
// * {@link #SKIP_FRAMES}, {@link #SKIP_CODE}.
// */
// public void accept(final ClassVisitor classVisitor, final int flags) {
// accept(classVisitor, new Attribute[0], flags);
// }
//
// /**
// * Makes the given visitor visit the Java class of this {@link ClassReader}.
// * This class is the one specified in the constructor (see
// * {@link #ClassReader(byte[]) ClassReader}).
// *
// * @param classVisitor the visitor that must visit this class.
// * @param attrs prototypes of the attributes that must be parsed during the
// * visit of the class. Any attribute whose type is not equal to the
// * type of one the prototypes will not be parsed: its byte array
// * value will be passed unchanged to the ClassWriter. <i>This may
// * corrupt it if this value contains references to the constant pool,
// * or has syntactic or semantic links with a class element that has
// * been transformed by a class adapter between the reader and the
// * writer</i>.
// * @param flags option flags that can be used to modify the default behavior
// * of this class. See {@link #SKIP_DEBUG}, {@link #EXPAND_FRAMES},
// * {@link #SKIP_FRAMES}, {@link #SKIP_CODE}.
// */
// public void accept(
// final ClassVisitor classVisitor,
// final Attribute[] attrs,
// final int flags)
// {
// byte[] b = this.b; // the bytecode array
// char[] c = new char[maxStringLength]; // buffer used to read strings
// int i, j, k; // loop variables
// int u, v, w; // indexes in b
// Attribute attr;
//
// int access;
// String name;
// String desc;
// String attrName;
// String signature;
// int anns = 0;
// int ianns = 0;
// Attribute cattrs = null;
//
// // visits the header
// u = header;
// access = readUnsignedShort(u);
// name = readClass(u + 2, c);
// v = items[readUnsignedShort(u + 4)];
// String superClassName = v == 0 ? null : readUTF8(v, c);
// String[] implementedItfs = new String[readUnsignedShort(u + 6)];
// w = 0;
// u += 8;
// for (i = 0; i < implementedItfs.length; ++i) {
// implementedItfs[i] = readClass(u, c);
// u += 2;
// }
//
// boolean skipCode = (flags & SKIP_CODE) != 0;
// boolean skipDebug = (flags & SKIP_DEBUG) != 0;
// boolean unzip = (flags & EXPAND_FRAMES) != 0;
//
// // skips fields and methods
// v = u;
// i = readUnsignedShort(v);
// v += 2;
// for (; i > 0; --i) {
// j = readUnsignedShort(v + 6);
// v += 8;
// for (; j > 0; --j) {
// v += 6 + readInt(v + 2);
// }
// }
// i = readUnsignedShort(v);
// v += 2;
// for (; i > 0; --i) {
// j = readUnsignedShort(v + 6);
// v += 8;
// for (; j > 0; --j) {
// v += 6 + readInt(v + 2);
// }
// }
// // reads the class's attributes
// signature = null;
// String sourceFile = null;
// String sourceDebug = null;
// String enclosingOwner = null;
// String enclosingName = null;
// String enclosingDesc = null;
//
// i = readUnsignedShort(v);
// v += 2;
// for (; i > 0; --i) {
// attrName = readUTF8(v, c);
// // tests are sorted in decreasing frequency order
// // (based on frequencies observed on typical classes)
// if ("SourceFile".equals(attrName)) {
// sourceFile = readUTF8(v + 6, c);
// } else if ("InnerClasses".equals(attrName)) {
// w = v + 6;
// } else if ("EnclosingMethod".equals(attrName)) {
// enclosingOwner = readClass(v + 6, c);
// int item = readUnsignedShort(v + 8);
// if (item != 0) {
// enclosingName = readUTF8(items[item], c);
// enclosingDesc = readUTF8(items[item] + 2, c);
// }
// } else if (SIGNATURES && "Signature".equals(attrName)) {
// signature = readUTF8(v + 6, c);
// } else if (ANNOTATIONS && "RuntimeVisibleAnnotations".equals(attrName)) {
// anns = v + 6;
// } else if ("Deprecated".equals(attrName)) {
// access |= Opcodes.ACC_DEPRECATED;
// } else if ("Synthetic".equals(attrName)) {
// access |= Opcodes.ACC_SYNTHETIC | ClassWriter.ACC_SYNTHETIC_ATTRIBUTE;
// } else if ("SourceDebugExtension".equals(attrName)) {
// int len = readInt(v + 2);
// sourceDebug = readUTF(v + 6, len, new char[len]);
// } else if (ANNOTATIONS && "RuntimeInvisibleAnnotations".equals(attrName)) {
// ianns = v + 6;
// } else {
// attr = readAttribute(attrs,
// attrName,
// v + 6,
// readInt(v + 2),
// c,
// -1,
// null);
// if (attr != null) {
// attr.next = cattrs;
// cattrs = attr;
// }
// }
// v += 6 + readInt(v + 2);
// }
// // calls the visit method
// classVisitor.visit(readInt(4),
// access,
// name,
// signature,
// superClassName,
// implementedItfs);
//
// // calls the visitSource method
// if (!skipDebug && (sourceFile != null || sourceDebug != null)) {
// classVisitor.visitSource(sourceFile, sourceDebug);
// }
//
// // calls the visitOuterClass method
// if (enclosingOwner != null) {
// classVisitor.visitOuterClass(enclosingOwner,
// enclosingName,
// enclosingDesc);
// }
//
// // visits the class annotations
// if (ANNOTATIONS) {
// for (i = 1; i >= 0; --i) {
// v = i == 0 ? ianns : anns;
// if (v != 0) {
// j = readUnsignedShort(v);
// v += 2;
// for (; j > 0; --j) {
// v = readAnnotationValues(v + 2,
// c,
// true,
// classVisitor.visitAnnotation(readUTF8(v, c), i != 0));
// }
// }
// }
// }
//
// // visits the class attributes
// while (cattrs != null) {
// attr = cattrs.next;
// cattrs.next = null;
// classVisitor.visitAttribute(cattrs);
// cattrs = attr;
// }
//
// // calls the visitInnerClass method
// if (w != 0) {
// i = readUnsignedShort(w);
// w += 2;
// for (; i > 0; --i) {
// classVisitor.visitInnerClass(readUnsignedShort(w) == 0
// ? null
// : readClass(w, c), readUnsignedShort(w + 2) == 0
// ? null
// : readClass(w + 2, c), readUnsignedShort(w + 4) == 0
// ? null
// : readUTF8(w + 4, c), readUnsignedShort(w + 6));
// w += 8;
// }
// }
//
// // visits the fields
// i = readUnsignedShort(u);
// u += 2;
// for (; i > 0; --i) {
// access = readUnsignedShort(u);
// name = readUTF8(u + 2, c);
// desc = readUTF8(u + 4, c);
// // visits the field's attributes and looks for a ConstantValue
// // attribute
// int fieldValueItem = 0;
// signature = null;
// anns = 0;
// ianns = 0;
// cattrs = null;
//
// j = readUnsignedShort(u + 6);
// u += 8;
// for (; j > 0; --j) {
// attrName = readUTF8(u, c);
// // tests are sorted in decreasing frequency order
// // (based on frequencies observed on typical classes)
// if ("ConstantValue".equals(attrName)) {
// fieldValueItem = readUnsignedShort(u + 6);
// } else if (SIGNATURES && "Signature".equals(attrName)) {
// signature = readUTF8(u + 6, c);
// } else if ("Deprecated".equals(attrName)) {
// access |= Opcodes.ACC_DEPRECATED;
// } else if ("Synthetic".equals(attrName)) {
// access |= Opcodes.ACC_SYNTHETIC | ClassWriter.ACC_SYNTHETIC_ATTRIBUTE;
// } else if (ANNOTATIONS && "RuntimeVisibleAnnotations".equals(attrName)) {
// anns = u + 6;
// } else if (ANNOTATIONS && "RuntimeInvisibleAnnotations".equals(attrName)) {
// ianns = u + 6;
// } else {
// attr = readAttribute(attrs,
// attrName,
// u + 6,
// readInt(u + 2),
// c,
// -1,
// null);
// if (attr != null) {
// attr.next = cattrs;
// cattrs = attr;
// }
// }
// u += 6 + readInt(u + 2);
// }
// // visits the field
// FieldVisitor fv = classVisitor.visitField(access,
// name,
// desc,
// signature,
// fieldValueItem == 0 ? null : readConst(fieldValueItem, c));
// // visits the field annotations and attributes
// if (fv != null) {
// if (ANNOTATIONS) {
// for (j = 1; j >= 0; --j) {
// v = j == 0 ? ianns : anns;
// if (v != 0) {
// k = readUnsignedShort(v);
// v += 2;
// for (; k > 0; --k) {
// v = readAnnotationValues(v + 2,
// c,
// true,
// fv.visitAnnotation(readUTF8(v, c), j != 0));
// }
// }
// }
// }
// while (cattrs != null) {
// attr = cattrs.next;
// cattrs.next = null;
// fv.visitAttribute(cattrs);
// cattrs = attr;
// }
// fv.visitEnd();
// }
// }
//
// // visits the methods
// i = readUnsignedShort(u);
// u += 2;
// for (; i > 0; --i) {
// int u0 = u + 6;
// access = readUnsignedShort(u);
// name = readUTF8(u + 2, c);
// desc = readUTF8(u + 4, c);
// signature = null;
// anns = 0;
// ianns = 0;
// int dann = 0;
// int mpanns = 0;
// int impanns = 0;
// cattrs = null;
// v = 0;
// w = 0;
//
// // looks for Code and Exceptions attributes
// j = readUnsignedShort(u + 6);
// u += 8;
// for (; j > 0; --j) {
// attrName = readUTF8(u, c);
// int attrSize = readInt(u + 2);
// u += 6;
// // tests are sorted in decreasing frequency order
// // (based on frequencies observed on typical classes)
// if ("Code".equals(attrName)) {
// if (!skipCode) {
// v = u;
// }
// } else if ("Exceptions".equals(attrName)) {
// w = u;
// } else if (SIGNATURES && "Signature".equals(attrName)) {
// signature = readUTF8(u, c);
// } else if ("Deprecated".equals(attrName)) {
// access |= Opcodes.ACC_DEPRECATED;
// } else if (ANNOTATIONS && "RuntimeVisibleAnnotations".equals(attrName)) {
// anns = u;
// } else if (ANNOTATIONS && "AnnotationDefault".equals(attrName)) {
// dann = u;
// } else if ("Synthetic".equals(attrName)) {
// access |= Opcodes.ACC_SYNTHETIC | ClassWriter.ACC_SYNTHETIC_ATTRIBUTE;
// } else if (ANNOTATIONS && "RuntimeInvisibleAnnotations".equals(attrName)) {
// ianns = u;
// } else if (ANNOTATIONS && "RuntimeVisibleParameterAnnotations".equals(attrName))
// {
// mpanns = u;
// } else if (ANNOTATIONS && "RuntimeInvisibleParameterAnnotations".equals(attrName))
// {
// impanns = u;
// } else {
// attr = readAttribute(attrs,
// attrName,
// u,
// attrSize,
// c,
// -1,
// null);
// if (attr != null) {
// attr.next = cattrs;
// cattrs = attr;
// }
// }
// u += attrSize;
// }
// // reads declared exceptions
// String[] exceptions;
// if (w == 0) {
// exceptions = null;
// } else {
// exceptions = new String[readUnsignedShort(w)];
// w += 2;
// for (j = 0; j < exceptions.length; ++j) {
// exceptions[j] = readClass(w, c);
// w += 2;
// }
// }
//
// // visits the method's code, if any
// MethodVisitor mv = classVisitor.visitMethod(access,
// name,
// desc,
// signature,
// exceptions);
//
// if (mv != null) {
// /*
// * if the returned MethodVisitor is in fact a MethodWriter, it
// * means there is no method adapter between the reader and the
// * writer. If, in addition, the writer's constant pool was
// * copied from this reader (mw.cw.cr == this), and the signature
// * and exceptions of the method have not been changed, then it
// * is possible to skip all visit events and just copy the
// * original code of the method to the writer (the access, name
// * and descriptor can have been changed, this is not important
// * since they are not copied as is from the reader).
// */
// if (WRITER && mv instanceof MethodWriter) {
// MethodWriter mw = (MethodWriter) mv;
// if (mw.cw.cr == this) {
// if (signature == mw.signature) {
// boolean sameExceptions = false;
// if (exceptions == null) {
// sameExceptions = mw.exceptionCount == 0;
// } else {
// if (exceptions.length == mw.exceptionCount) {
// sameExceptions = true;
// for (j = exceptions.length - 1; j >= 0; --j)
// {
// w -= 2;
// if (mw.exceptions[j] != readUnsignedShort(w))
// {
// sameExceptions = false;
// break;
// }
// }
// }
// }
// if (sameExceptions) {
// /*
// * we do not copy directly the code into
// * MethodWriter to save a byte array copy
// * operation. The real copy will be done in
// * ClassWriter.toByteArray().
// */
// mw.classReaderOffset = u0;
// mw.classReaderLength = u - u0;
// continue;
// }
// }
// }
// }
//
// if (ANNOTATIONS && dann != 0) {
// AnnotationVisitor dv = mv.visitAnnotationDefault();
// readAnnotationValue(dann, c, null, dv);
// if (dv != null) {
// dv.visitEnd();
// }
// }
// if (ANNOTATIONS) {
// for (j = 1; j >= 0; --j) {
// w = j == 0 ? ianns : anns;
// if (w != 0) {
// k = readUnsignedShort(w);
// w += 2;
// for (; k > 0; --k) {
// w = readAnnotationValues(w + 2,
// c,
// true,
// mv.visitAnnotation(readUTF8(w, c), j != 0));
// }
// }
// }
// }
// if (ANNOTATIONS && mpanns != 0) {
// readParameterAnnotations(mpanns, desc, c, true, mv);
// }
// if (ANNOTATIONS && impanns != 0) {
// readParameterAnnotations(impanns, desc, c, false, mv);
// }
// while (cattrs != null) {
// attr = cattrs.next;
// cattrs.next = null;
// mv.visitAttribute(cattrs);
// cattrs = attr;
// }
// }
//
// if (mv != null && v != 0) {
// int maxStack = readUnsignedShort(v);
// int maxLocals = readUnsignedShort(v + 2);
// int codeLength = readInt(v + 4);
// v += 8;
//
// int codeStart = v;
// int codeEnd = v + codeLength;
//
// mv.visitCode();
//
// // 1st phase: finds the labels
// int label;
// Label[] labels = new Label[codeLength + 2];
// readLabel(codeLength + 1, labels);
// while (v < codeEnd) {
// w = v - codeStart;
// int opcode = b[v] & 0xFF;
// switch (ClassWriter.TYPE[opcode]) {
// case ClassWriter.NOARG_INSN:
// case ClassWriter.IMPLVAR_INSN:
// v += 1;
// break;
// case ClassWriter.LABEL_INSN:
// readLabel(w + readShort(v + 1), labels);
// v += 3;
// break;
// case ClassWriter.LABELW_INSN:
// readLabel(w + readInt(v + 1), labels);
// v += 5;
// break;
// case ClassWriter.WIDE_INSN:
// opcode = b[v + 1] & 0xFF;
// if (opcode == Opcodes.IINC) {
// v += 6;
// } else {
// v += 4;
// }
// break;
// case ClassWriter.TABL_INSN:
// // skips 0 to 3 padding bytes*
// v = v + 4 - (w & 3);
// // reads instruction
// readLabel(w + readInt(v), labels);
// j = readInt(v + 8) - readInt(v + 4) + 1;
// v += 12;
// for (; j > 0; --j) {
// readLabel(w + readInt(v), labels);
// v += 4;
// }
// break;
// case ClassWriter.LOOK_INSN:
// // skips 0 to 3 padding bytes*
// v = v + 4 - (w & 3);
// // reads instruction
// readLabel(w + readInt(v), labels);
// j = readInt(v + 4);
// v += 8;
// for (; j > 0; --j) {
// readLabel(w + readInt(v + 4), labels);
// v += 8;
// }
// break;
// case ClassWriter.VAR_INSN:
// case ClassWriter.SBYTE_INSN:
// case ClassWriter.LDC_INSN:
// v += 2;
// break;
// case ClassWriter.SHORT_INSN:
// case ClassWriter.LDCW_INSN:
// case ClassWriter.FIELDORMETH_INSN:
// case ClassWriter.TYPE_INSN:
// case ClassWriter.IINC_INSN:
// v += 3;
// break;
// case ClassWriter.ITFDYNMETH_INSN:
// v += 5;
// break;
// // case MANA_INSN:
// default:
// v += 4;
// break;
// }
// }
// // parses the try catch entries
// j = readUnsignedShort(v);
// v += 2;
// for (; j > 0; --j) {
// Label start = readLabel(readUnsignedShort(v), labels);
// Label end = readLabel(readUnsignedShort(v + 2), labels);
// Label handler = readLabel(readUnsignedShort(v + 4), labels);
// int type = readUnsignedShort(v + 6);
// if (type == 0) {
// mv.visitTryCatchBlock(start, end, handler, null);
// } else {
// mv.visitTryCatchBlock(start,
// end,
// handler,
// readUTF8(items[type], c));
// }
// v += 8;
// }
// // parses the local variable, line number tables, and code
// // attributes
// int varTable = 0;
// int varTypeTable = 0;
// int stackMap = 0;
// int stackMapSize = 0;
// int frameCount = 0;
// int frameMode = 0;
// int frameOffset = 0;
// int frameLocalCount = 0;
// int frameLocalDiff = 0;
// int frameStackCount = 0;
// Object[] frameLocal = null;
// Object[] frameStack = null;
// boolean zip = true;
// cattrs = null;
// j = readUnsignedShort(v);
// v += 2;
// for (; j > 0; --j) {
// attrName = readUTF8(v, c);
// if ("LocalVariableTable".equals(attrName)) {
// if (!skipDebug) {
// varTable = v + 6;
// k = readUnsignedShort(v + 6);
// w = v + 8;
// for (; k > 0; --k) {
// label = readUnsignedShort(w);
// if (labels[label] == null) {
// readLabel(label, labels).status |= Label.DEBUG;
// }
// label += readUnsignedShort(w + 2);
// if (labels[label] == null) {
// readLabel(label, labels).status |= Label.DEBUG;
// }
// w += 10;
// }
// }
// } else if ("LocalVariableTypeTable".equals(attrName)) {
// varTypeTable = v + 6;
// } else if ("LineNumberTable".equals(attrName)) {
// if (!skipDebug) {
// k = readUnsignedShort(v + 6);
// w = v + 8;
// for (; k > 0; --k) {
// label = readUnsignedShort(w);
// if (labels[label] == null) {
// readLabel(label, labels).status |= Label.DEBUG;
// }
// labels[label].line = readUnsignedShort(w + 2);
// w += 4;
// }
// }
// } else if (FRAMES && "StackMapTable".equals(attrName)) {
// if ((flags & SKIP_FRAMES) == 0) {
// stackMap = v + 8;
// stackMapSize = readInt(v + 2);
// frameCount = readUnsignedShort(v + 6);
// }
// /*
// * here we do not extract the labels corresponding to
// * the attribute content. This would require a full
// * parsing of the attribute, which would need to be
// * repeated in the second phase (see below). Instead the
// * content of the attribute is read one frame at a time
// * (i.e. after a frame has been visited, the next frame
// * is read), and the labels it contains are also
// * extracted one frame at a time. Thanks to the ordering
// * of frames, having only a "one frame lookahead" is not
// * a problem, i.e. it is not possible to see an offset
// * smaller than the offset of the current insn and for
// * which no Label exist.
// */
// /*
// * This is not true for UNINITIALIZED type offsets. We
// * solve this by parsing the stack map table without a
// * full decoding (see below).
// */
// } else if (FRAMES && "StackMap".equals(attrName)) {
// if ((flags & SKIP_FRAMES) == 0) {
// stackMap = v + 8;
// stackMapSize = readInt(v + 2);
// frameCount = readUnsignedShort(v + 6);
// zip = false;
// }
// /*
// * IMPORTANT! here we assume that the frames are
// * ordered, as in the StackMapTable attribute, although
// * this is not guaranteed by the attribute format.
// */
// } else {
// for (k = 0; k < attrs.length; ++k) {
// if (attrs[k].type.equals(attrName)) {
// attr = attrs[k].read(this,
// v + 6,
// readInt(v + 2),
// c,
// codeStart - 8,
// labels);
// if (attr != null) {
// attr.next = cattrs;
// cattrs = attr;
// }
// }
// }
// }
// v += 6 + readInt(v + 2);
// }
//
// // 2nd phase: visits each instruction
// if (FRAMES && stackMap != 0) {
// // creates the very first (implicit) frame from the method
// // descriptor
// frameLocal = new Object[maxLocals];
// frameStack = new Object[maxStack];
// if (unzip) {
// int local = 0;
// if ((access & Opcodes.ACC_STATIC) == 0) {
// if ("<init>".equals(name)) {
// frameLocal[local++] = Opcodes.UNINITIALIZED_THIS;
// } else {
// frameLocal[local++] = readClass(header + 2, c);
// }
// }
// j = 1;
// loop: while (true) {
// k = j;
// switch (desc.charAt(j++)) {
// case 'Z':
// case 'C':
// case 'B':
// case 'S':
// case 'I':
// frameLocal[local++] = Opcodes.INTEGER;
// break;
// case 'F':
// frameLocal[local++] = Opcodes.FLOAT;
// break;
// case 'J':
// frameLocal[local++] = Opcodes.LONG;
// break;
// case 'D':
// frameLocal[local++] = Opcodes.DOUBLE;
// break;
// case '[':
// while (desc.charAt(j) == '[') {
// ++j;
// }
// if (desc.charAt(j) == 'L') {
// ++j;
// while (desc.charAt(j) != ';') {
// ++j;
// }
// }
// frameLocal[local++] = desc.substring(k, ++j);
// break;
// case 'L':
// while (desc.charAt(j) != ';') {
// ++j;
// }
// frameLocal[local++] = desc.substring(k + 1,
// j++);
// break;
// default:
// break loop;
// }
// }
// frameLocalCount = local;
// }
// /*
// * for the first explicit frame the offset is not
// * offset_delta + 1 but only offset_delta; setting the
// * implicit frame offset to -1 allow the use of the
// * "offset_delta + 1" rule in all cases
// */
// frameOffset = -1;
// /*
// * Finds labels for UNINITIALIZED frame types. Instead of
// * decoding each element of the stack map table, we look
// * for 3 consecutive bytes that "look like" an UNINITIALIZED
// * type (tag 8, offset within code bounds, NEW instruction
// * at this offset). We may find false positives (i.e. not
// * real UNINITIALIZED types), but this should be rare, and
// * the only consequence will be the creation of an unneeded
// * label. This is better than creating a label for each NEW
// * instruction, and faster than fully decoding the whole
// * stack map table.
// */
// for (j = stackMap; j < stackMap + stackMapSize - 2; ++j) {
// if (b[j] == 8) { // UNINITIALIZED FRAME TYPE
// k = readUnsignedShort(j + 1);
// if (k >= 0 && k < codeLength) { // potential offset
// if ((b[codeStart + k] & 0xFF) == Opcodes.NEW) { // NEW at this offset
// readLabel(k, labels);
// }
// }
// }
// }
// }
// v = codeStart;
// Label l;
// while (v < codeEnd) {
// w = v - codeStart;
//
// l = labels[w];
// if (l != null) {
// mv.visitLabel(l);
// if (!skipDebug && l.line > 0) {
// mv.visitLineNumber(l.line, l);
// }
// }
//
// while (FRAMES && frameLocal != null
// && (frameOffset == w || frameOffset == -1))
// {
// // if there is a frame for this offset,
// // makes the visitor visit it,
// // and reads the next frame if there is one.
// if (!zip || unzip) {
// mv.visitFrame(Opcodes.F_NEW,
// frameLocalCount,
// frameLocal,
// frameStackCount,
// frameStack);
// } else if (frameOffset != -1) {
// mv.visitFrame(frameMode,
// frameLocalDiff,
// frameLocal,
// frameStackCount,
// frameStack);
// }
//
// if (frameCount > 0) {
// int tag, delta, n;
// if (zip) {
// tag = b[stackMap++] & 0xFF;
// } else {
// tag = MethodWriter.FULL_FRAME;
// frameOffset = -1;
// }
// frameLocalDiff = 0;
// if (tag < MethodWriter.SAME_LOCALS_1_STACK_ITEM_FRAME)
// {
// delta = tag;
// frameMode = Opcodes.F_SAME;
// frameStackCount = 0;
// } else if (tag < MethodWriter.RESERVED) {
// delta = tag
// - MethodWriter.SAME_LOCALS_1_STACK_ITEM_FRAME;
// stackMap = readFrameType(frameStack,
// 0,
// stackMap,
// c,
// labels);
// frameMode = Opcodes.F_SAME1;
// frameStackCount = 1;
// } else {
// delta = readUnsignedShort(stackMap);
// stackMap += 2;
// if (tag == MethodWriter.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED)
// {
// stackMap = readFrameType(frameStack,
// 0,
// stackMap,
// c,
// labels);
// frameMode = Opcodes.F_SAME1;
// frameStackCount = 1;
// } else if (tag >= MethodWriter.CHOP_FRAME
// && tag < MethodWriter.SAME_FRAME_EXTENDED)
// {
// frameMode = Opcodes.F_CHOP;
// frameLocalDiff = MethodWriter.SAME_FRAME_EXTENDED
// - tag;
// frameLocalCount -= frameLocalDiff;
// frameStackCount = 0;
// } else if (tag == MethodWriter.SAME_FRAME_EXTENDED)
// {
// frameMode = Opcodes.F_SAME;
// frameStackCount = 0;
// } else if (tag < MethodWriter.FULL_FRAME) {
// j = unzip ? frameLocalCount : 0;
// for (k = tag
// - MethodWriter.SAME_FRAME_EXTENDED; k > 0; k--)
// {
// stackMap = readFrameType(frameLocal,
// j++,
// stackMap,
// c,
// labels);
// }
// frameMode = Opcodes.F_APPEND;
// frameLocalDiff = tag
// - MethodWriter.SAME_FRAME_EXTENDED;
// frameLocalCount += frameLocalDiff;
// frameStackCount = 0;
// } else { // if (tag == FULL_FRAME) {
// frameMode = Opcodes.F_FULL;
// n = frameLocalDiff = frameLocalCount = readUnsignedShort(stackMap);
// stackMap += 2;
// for (j = 0; n > 0; n--) {
// stackMap = readFrameType(frameLocal,
// j++,
// stackMap,
// c,
// labels);
// }
// n = frameStackCount = readUnsignedShort(stackMap);
// stackMap += 2;
// for (j = 0; n > 0; n--) {
// stackMap = readFrameType(frameStack,
// j++,
// stackMap,
// c,
// labels);
// }
// }
// }
// frameOffset += delta + 1;
// readLabel(frameOffset, labels);
//
// --frameCount;
// } else {
// frameLocal = null;
// }
// }
//
// int opcode = b[v] & 0xFF;
// switch (ClassWriter.TYPE[opcode]) {
// case ClassWriter.NOARG_INSN:
// mv.visitInsn(opcode);
// v += 1;
// break;
// case ClassWriter.IMPLVAR_INSN:
// if (opcode > Opcodes.ISTORE) {
// opcode -= 59; // ISTORE_0
// mv.visitVarInsn(Opcodes.ISTORE + (opcode >> 2),
// opcode & 0x3);
// } else {
// opcode -= 26; // ILOAD_0
// mv.visitVarInsn(Opcodes.ILOAD + (opcode >> 2),
// opcode & 0x3);
// }
// v += 1;
// break;
// case ClassWriter.LABEL_INSN:
// mv.visitJumpInsn(opcode, labels[w
// + readShort(v + 1)]);
// v += 3;
// break;
// case ClassWriter.LABELW_INSN:
// mv.visitJumpInsn(opcode - 33, labels[w
// + readInt(v + 1)]);
// v += 5;
// break;
// case ClassWriter.WIDE_INSN:
// opcode = b[v + 1] & 0xFF;
// if (opcode == Opcodes.IINC) {
// mv.visitIincInsn(readUnsignedShort(v + 2),
// readShort(v + 4));
// v += 6;
// } else {
// mv.visitVarInsn(opcode,
// readUnsignedShort(v + 2));
// v += 4;
// }
// break;
// case ClassWriter.TABL_INSN:
// // skips 0 to 3 padding bytes
// v = v + 4 - (w & 3);
// // reads instruction
// label = w + readInt(v);
// int min = readInt(v + 4);
// int max = readInt(v + 8);
// v += 12;
// Label[] table = new Label[max - min + 1];
// for (j = 0; j < table.length; ++j) {
// table[j] = labels[w + readInt(v)];
// v += 4;
// }
// mv.visitTableSwitchInsn(min,
// max,
// labels[label],
// table);
// break;
// case ClassWriter.LOOK_INSN:
// // skips 0 to 3 padding bytes
// v = v + 4 - (w & 3);
// // reads instruction
// label = w + readInt(v);
// j = readInt(v + 4);
// v += 8;
// int[] keys = new int[j];
// Label[] values = new Label[j];
// for (j = 0; j < keys.length; ++j) {
// keys[j] = readInt(v);
// values[j] = labels[w + readInt(v + 4)];
// v += 8;
// }
// mv.visitLookupSwitchInsn(labels[label],
// keys,
// values);
// break;
// case ClassWriter.VAR_INSN:
// mv.visitVarInsn(opcode, b[v + 1] & 0xFF);
// v += 2;
// break;
// case ClassWriter.SBYTE_INSN:
// mv.visitIntInsn(opcode, b[v + 1]);
// v += 2;
// break;
// case ClassWriter.SHORT_INSN:
// mv.visitIntInsn(opcode, readShort(v + 1));
// v += 3;
// break;
// case ClassWriter.LDC_INSN:
// mv.visitLdcInsn(readConst(b[v + 1] & 0xFF, c));
// v += 2;
// break;
// case ClassWriter.LDCW_INSN:
// mv.visitLdcInsn(readConst(readUnsignedShort(v + 1),
// c));
// v += 3;
// break;
// case ClassWriter.FIELDORMETH_INSN:
// case ClassWriter.ITFDYNMETH_INSN:
// int cpIndex = items[readUnsignedShort(v + 1)];
// String iowner;
// // INVOKEDYNAMIC is receiverless
// if (opcode == Opcodes.INVOKEDYNAMIC) {
// iowner = Opcodes.INVOKEDYNAMIC_OWNER;
// } else {
// iowner = readClass(cpIndex, c);
// cpIndex = items[readUnsignedShort(cpIndex + 2)];
// }
// String iname = readUTF8(cpIndex, c);
// String idesc = readUTF8(cpIndex + 2, c);
// if (opcode < Opcodes.INVOKEVIRTUAL) {
// mv.visitFieldInsn(opcode, iowner, iname, idesc);
// } else {
// mv.visitMethodInsn(opcode, iowner, iname, idesc);
// }
// if (opcode == Opcodes.INVOKEINTERFACE || opcode == Opcodes.INVOKEDYNAMIC) {
// v += 5;
// } else {
// v += 3;
// }
// break;
// case ClassWriter.TYPE_INSN:
// mv.visitTypeInsn(opcode, readClass(v + 1, c));
// v += 3;
// break;
// case ClassWriter.IINC_INSN:
// mv.visitIincInsn(b[v + 1] & 0xFF, b[v + 2]);
// v += 3;
// break;
// // case MANA_INSN:
// default:
// mv.visitMultiANewArrayInsn(readClass(v + 1, c),
// b[v + 3] & 0xFF);
// v += 4;
// break;
// }
// }
// l = labels[codeEnd - codeStart];
// if (l != null) {
// mv.visitLabel(l);
// }
// // visits the local variable tables
// if (!skipDebug && varTable != 0) {
// int[] typeTable = null;
// if (varTypeTable != 0) {
// k = readUnsignedShort(varTypeTable) * 3;
// w = varTypeTable + 2;
// typeTable = new int[k];
// while (k > 0) {
// typeTable[--k] = w + 6; // signature
// typeTable[--k] = readUnsignedShort(w + 8); // index
// typeTable[--k] = readUnsignedShort(w); // start
// w += 10;
// }
// }
// k = readUnsignedShort(varTable);
// w = varTable + 2;
// for (; k > 0; --k) {
// int start = readUnsignedShort(w);
// int length = readUnsignedShort(w + 2);
// int index = readUnsignedShort(w + 8);
// String vsignature = null;
// if (typeTable != null) {
// for (int a = 0; a < typeTable.length; a += 3) {
// if (typeTable[a] == start
// && typeTable[a + 1] == index)
// {
// vsignature = readUTF8(typeTable[a + 2], c);
// break;
// }
// }
// }
// mv.visitLocalVariable(readUTF8(w + 4, c),
// readUTF8(w + 6, c),
// vsignature,
// labels[start],
// labels[start + length],
// index);
// w += 10;
// }
// }
// // visits the other attributes
// while (cattrs != null) {
// attr = cattrs.next;
// cattrs.next = null;
// mv.visitAttribute(cattrs);
// cattrs = attr;
// }
// // visits the max stack and max locals values
// mv.visitMaxs(maxStack, maxLocals);
// }
//
// if (mv != null) {
// mv.visitEnd();
// }
// }
//
// // visits the end of the class
// classVisitor.visitEnd();
// }
//
// /**
// * Reads parameter annotations and makes the given visitor visit them.
// *
// * @param v start offset in {@link #b b} of the annotations to be read.
// * @param desc the method descriptor.
// * @param buf buffer to be used to call {@link #readUTF8 readUTF8},
// * {@link #readClass(int,char[]) readClass} or
// * {@link #readConst readConst}.
// * @param visible <tt>true</tt> if the annotations to be read are visible
// * at runtime.
// * @param mv the visitor that must visit the annotations.
// */
// private void readParameterAnnotations(
// int v,
// final String desc,
// final char[] buf,
// final boolean visible,
// final MethodVisitor mv)
// {
// int i;
// int n = b[v++] & 0xFF;
// // workaround for a bug in javac (javac compiler generates a parameter
// // annotation array whose size is equal to the number of parameters in
// // the Java source file, while it should generate an array whose size is
// // equal to the number of parameters in the method descriptor - which
// // includes the synthetic parameters added by the compiler). This work-
// // around supposes that the synthetic parameters are the first ones.
// int synthetics = Type.getArgumentTypes(desc).length - n;
// AnnotationVisitor av;
// for (i = 0; i < synthetics; ++i) {
// // virtual annotation to detect synthetic parameters in MethodWriter
// av = mv.visitParameterAnnotation(i, "Ljava/lang/Synthetic;", false);
// if (av != null) {
// av.visitEnd();
// }
// }
// for (; i < n + synthetics; ++i) {
// int j = readUnsignedShort(v);
// v += 2;
// for (; j > 0; --j) {
// av = mv.visitParameterAnnotation(i, readUTF8(v, buf), visible);
// v = readAnnotationValues(v + 2, buf, true, av);
// }
// }
// }
//
// /**
// * Reads the values of an annotation and makes the given visitor visit them.
// *
// * @param v the start offset in {@link #b b} of the values to be read
// * (including the unsigned short that gives the number of values).
// * @param buf buffer to be used to call {@link #readUTF8 readUTF8},
// * {@link #readClass(int,char[]) readClass} or
// * {@link #readConst readConst}.
// * @param named if the annotation values are named or not.
// * @param av the visitor that must visit the values.
// * @return the end offset of the annotation values.
// */
// private int readAnnotationValues(
// int v,
// final char[] buf,
// final boolean named,
// final AnnotationVisitor av)
// {
// int i = readUnsignedShort(v);
// v += 2;
// if (named) {
// for (; i > 0; --i) {
// v = readAnnotationValue(v + 2, buf, readUTF8(v, buf), av);
// }
// } else {
// for (; i > 0; --i) {
// v = readAnnotationValue(v, buf, null, av);
// }
// }
// if (av != null) {
// av.visitEnd();
// }
// return v;
// }
//
// /**
// * Reads a value of an annotation and makes the given visitor visit it.
// *
// * @param v the start offset in {@link #b b} of the value to be read (<i>not
// * including the value name constant pool index</i>).
// * @param buf buffer to be used to call {@link #readUTF8 readUTF8},
// * {@link #readClass(int,char[]) readClass} or
// * {@link #readConst readConst}.
// * @param name the name of the value to be read.
// * @param av the visitor that must visit the value.
// * @return the end offset of the annotation value.
// */
// private int readAnnotationValue(
// int v,
// final char[] buf,
// final String name,
// final AnnotationVisitor av)
// {
// int i;
// if (av == null) {
// switch (b[v] & 0xFF) {
// case 'e': // enum_const_value
// return v + 5;
// case '@': // annotation_value
// return readAnnotationValues(v + 3, buf, true, null);
// case '[': // array_value
// return readAnnotationValues(v + 1, buf, false, null);
// default:
// return v + 3;
// }
// }
// switch (b[v++] & 0xFF) {
// case 'I': // pointer to CONSTANT_Integer
// case 'J': // pointer to CONSTANT_Long
// case 'F': // pointer to CONSTANT_Float
// case 'D': // pointer to CONSTANT_Double
// av.visit(name, readConst(readUnsignedShort(v), buf));
// v += 2;
// break;
// case 'B': // pointer to CONSTANT_Byte
// av.visit(name,
// new Byte((byte) readInt(items[readUnsignedShort(v)])));
// v += 2;
// break;
// case 'Z': // pointer to CONSTANT_Boolean
// av.visit(name, readInt(items[readUnsignedShort(v)]) == 0
// ? Boolean.FALSE
// : Boolean.TRUE);
// v += 2;
// break;
// case 'S': // pointer to CONSTANT_Short
// av.visit(name,
// new Short((short) readInt(items[readUnsignedShort(v)])));
// v += 2;
// break;
// case 'C': // pointer to CONSTANT_Char
// av.visit(name,
// new Character((char) readInt(items[readUnsignedShort(v)])));
// v += 2;
// break;
// case 's': // pointer to CONSTANT_Utf8
// av.visit(name, readUTF8(v, buf));
// v += 2;
// break;
// case 'e': // enum_const_value
// av.visitEnum(name, readUTF8(v, buf), readUTF8(v + 2, buf));
// v += 4;
// break;
// case 'c': // class_info
// av.visit(name, Type.getType(readUTF8(v, buf)));
// v += 2;
// break;
// case '@': // annotation_value
// v = readAnnotationValues(v + 2,
// buf,
// true,
// av.visitAnnotation(name, readUTF8(v, buf)));
// break;
// case '[': // array_value
// int size = readUnsignedShort(v);
// v += 2;
// if (size == 0) {
// return readAnnotationValues(v - 2,
// buf,
// false,
// av.visitArray(name));
// }
// switch (this.b[v++] & 0xFF) {
// case 'B':
// byte[] bv = new byte[size];
// for (i = 0; i < size; i++) {
// bv[i] = (byte) readInt(items[readUnsignedShort(v)]);
// v += 3;
// }
// av.visit(name, bv);
// --v;
// break;
// case 'Z':
// boolean[] zv = new boolean[size];
// for (i = 0; i < size; i++) {
// zv[i] = readInt(items[readUnsignedShort(v)]) != 0;
// v += 3;
// }
// av.visit(name, zv);
// --v;
// break;
// case 'S':
// short[] sv = new short[size];
// for (i = 0; i < size; i++) {
// sv[i] = (short) readInt(items[readUnsignedShort(v)]);
// v += 3;
// }
// av.visit(name, sv);
// --v;
// break;
// case 'C':
// char[] cv = new char[size];
// for (i = 0; i < size; i++) {
// cv[i] = (char) readInt(items[readUnsignedShort(v)]);
// v += 3;
// }
// av.visit(name, cv);
// --v;
// break;
// case 'I':
// int[] iv = new int[size];
// for (i = 0; i < size; i++) {
// iv[i] = readInt(items[readUnsignedShort(v)]);
// v += 3;
// }
// av.visit(name, iv);
// --v;
// break;
// case 'J':
// long[] lv = new long[size];
// for (i = 0; i < size; i++) {
// lv[i] = readLong(items[readUnsignedShort(v)]);
// v += 3;
// }
// av.visit(name, lv);
// --v;
// break;
// case 'F':
// float[] fv = new float[size];
// for (i = 0; i < size; i++) {
// fv[i] = Float.intBitsToFloat(readInt(items[readUnsignedShort(v)]));
// v += 3;
// }
// av.visit(name, fv);
// --v;
// break;
// case 'D':
// double[] dv = new double[size];
// for (i = 0; i < size; i++) {
// dv[i] = Double.longBitsToDouble(readLong(items[readUnsignedShort(v)]));
// v += 3;
// }
// av.visit(name, dv);
// --v;
// break;
// default:
// v = readAnnotationValues(v - 3,
// buf,
// false,
// av.visitArray(name));
// }
// }
// return v;
// }
//
// private int readFrameType(
// final Object[] frame,
// final int index,
// int v,
// final char[] buf,
// final Label[] labels)
// {
// int type = b[v++] & 0xFF;
// switch (type) {
// case 0:
// frame[index] = Opcodes.TOP;
// break;
// case 1:
// frame[index] = Opcodes.INTEGER;
// break;
// case 2:
// frame[index] = Opcodes.FLOAT;
// break;
// case 3:
// frame[index] = Opcodes.DOUBLE;
// break;
// case 4:
// frame[index] = Opcodes.LONG;
// break;
// case 5:
// frame[index] = Opcodes.NULL;
// break;
// case 6:
// frame[index] = Opcodes.UNINITIALIZED_THIS;
// break;
// case 7: // Object
// frame[index] = readClass(v, buf);
// v += 2;
// break;
// default: // Uninitialized
// frame[index] = readLabel(readUnsignedShort(v), labels);
// v += 2;
// }
// return v;
// }
//
// /**
// * Returns the label corresponding to the given offset. The default
// * implementation of this method creates a label for the given offset if it
// * has not been already created.
// *
// * @param offset a bytecode offset in a method.
// * @param labels the already created labels, indexed by their offset. If a
// * label already exists for offset this method must not create a new
// * one. Otherwise it must store the new label in this array.
// * @return a non null Label, which must be equal to labels[offset].
// */
// protected Label readLabel(int offset, Label[] labels) {
// if (labels[offset] == null) {
// labels[offset] = new Label();
// }
// return labels[offset];
// }
//
// /**
// * Reads an attribute in {@link #b b}.
// *
// * @param attrs prototypes of the attributes that must be parsed during the
// * visit of the class. Any attribute whose type is not equal to the
// * type of one the prototypes is ignored (i.e. an empty
// * {@link Attribute} instance is returned).
// * @param type the type of the attribute.
// * @param off index of the first byte of the attribute's content in
// * {@link #b b}. The 6 attribute header bytes, containing the type
// * and the length of the attribute, are not taken into account here
// * (they have already been read).
// * @param len the length of the attribute's content.
// * @param buf buffer to be used to call {@link #readUTF8 readUTF8},
// * {@link #readClass(int,char[]) readClass} or
// * {@link #readConst readConst}.
// * @param codeOff index of the first byte of code's attribute content in
// * {@link #b b}, or -1 if the attribute to be read is not a code
// * attribute. The 6 attribute header bytes, containing the type and
// * the length of the attribute, are not taken into account here.
// * @param labels the labels of the method's code, or <tt>null</tt> if the
// * attribute to be read is not a code attribute.
// * @return the attribute that has been read, or <tt>null</tt> to skip this
// * attribute.
// */
// private Attribute readAttribute(
// final Attribute[] attrs,
// final String type,
// final int off,
// final int len,
// final char[] buf,
// final int codeOff,
// final Label[] labels)
// {
// for (int i = 0; i < attrs.length; ++i) {
// if (attrs[i].type.equals(type)) {
// return attrs[i].read(this, off, len, buf, codeOff, labels);
// }
// }
// return new Attribute(type).read(this, off, len, null, -1, null);
// }
//
// // ------------------------------------------------------------------------
// // Utility methods: low level parsing
// // ------------------------------------------------------------------------
//
// /**
// * Returns the start index of the constant pool item in {@link #b b}, plus
// * one. <i>This method is intended for {@link Attribute} sub classes, and is
// * normally not needed by class generators or adapters.</i>
// *
// * @param item the index a constant pool item.
// * @return the start index of the constant pool item in {@link #b b}, plus
// * one.
// */
// public int getItem(final int item) {
// return items[item];
// }
//
// /**
// * Reads a byte value in {@link #b b}. <i>This method is intended for
// * {@link Attribute} sub classes, and is normally not needed by class
// * generators or adapters.</i>
// *
// * @param index the start index of the value to be read in {@link #b b}.
// * @return the read value.
// */
// public int readByte(final int index) {
// return b[index] & 0xFF;
// }
//
// /**
// * Reads an unsigned short value in {@link #b b}. <i>This method is
// * intended for {@link Attribute} sub classes, and is normally not needed by
// * class generators or adapters.</i>
// *
// * @param index the start index of the value to be read in {@link #b b}.
// * @return the read value.
// */
// public int readUnsignedShort(final int index) {
// byte[] b = this.b;
// return ((b[index] & 0xFF) << 8) | (b[index + 1] & 0xFF);
// }
//
// /**
// * Reads a signed short value in {@link #b b}. <i>This method is intended
// * for {@link Attribute} sub classes, and is normally not needed by class
// * generators or adapters.</i>
// *
// * @param index the start index of the value to be read in {@link #b b}.
// * @return the read value.
// */
// public short readShort(final int index) {
// byte[] b = this.b;
// return (short) (((b[index] & 0xFF) << 8) | (b[index + 1] & 0xFF));
// }
//
// /**
// * Reads a signed int value in {@link #b b}. <i>This method is intended for
// * {@link Attribute} sub classes, and is normally not needed by class
// * generators or adapters.</i>
// *
// * @param index the start index of the value to be read in {@link #b b}.
// * @return the read value.
// */
// public int readInt(final int index) {
// byte[] b = this.b;
// return ((b[index] & 0xFF) << 24) | ((b[index + 1] & 0xFF) << 16)
// | ((b[index + 2] & 0xFF) << 8) | (b[index + 3] & 0xFF);
// }
//
// /**
// * Reads a signed long value in {@link #b b}. <i>This method is intended
// * for {@link Attribute} sub classes, and is normally not needed by class
// * generators or adapters.</i>
// *
// * @param index the start index of the value to be read in {@link #b b}.
// * @return the read value.
// */
// public long readLong(final int index) {
// long l1 = readInt(index);
// long l0 = readInt(index + 4) & 0xFFFFFFFFL;
// return (l1 << 32) | l0;
// }
//
// /**
// * Reads an UTF8 string constant pool item in {@link #b b}. <i>This method
// * is intended for {@link Attribute} sub classes, and is normally not needed
// * by class generators or adapters.</i>
// *
// * @param index the start index of an unsigned short value in {@link #b b},
// * whose value is the index of an UTF8 constant pool item.
// * @param buf buffer to be used to read the item. This buffer must be
// * sufficiently large. It is not automatically resized.
// * @return the String corresponding to the specified UTF8 item.
// */
// public String readUTF8(int index, final char[] buf) {
// int item = readUnsignedShort(index);
// String s = strings[item];
// if (s != null) {
// return s;
// }
// index = items[item];
// return strings[item] = readUTF(index + 2, readUnsignedShort(index), buf);
// }
//
// /**
// * Reads UTF8 string in {@link #b b}.
// *
// * @param index start offset of the UTF8 string to be read.
// * @param utfLen length of the UTF8 string to be read.
// * @param buf buffer to be used to read the string. This buffer must be
// * sufficiently large. It is not automatically resized.
// * @return the String corresponding to the specified UTF8 string.
// */
// private String readUTF(int index, final int utfLen, final char[] buf) {
// int endIndex = index + utfLen;
// byte[] b = this.b;
// int strLen = 0;
// int c;
// int st = 0;
// char cc = 0;
// while (index < endIndex) {
// c = b[index++];
// switch (st) {
// case 0:
// c = c & 0xFF;
// if (c < 0x80) { // 0xxxxxxx
// buf[strLen++] = (char) c;
// } else if (c < 0xE0 && c > 0xBF) { // 110x xxxx 10xx xxxx
// cc = (char) (c & 0x1F);
// st = 1;
// } else { // 1110 xxxx 10xx xxxx 10xx xxxx
// cc = (char) (c & 0x0F);
// st = 2;
// }
// break;
//
// case 1: // byte 2 of 2-byte char or byte 3 of 3-byte char
// buf[strLen++] = (char) ((cc << 6) | (c & 0x3F));
// st = 0;
// break;
//
// case 2: // byte 2 of 3-byte char
// cc = (char) ((cc << 6) | (c & 0x3F));
// st = 1;
// break;
// }
// }
// return new String(buf, 0, strLen);
// }
//
// /**
// * Reads a class constant pool item in {@link #b b}. <i>This method is
// * intended for {@link Attribute} sub classes, and is normally not needed by
// * class generators or adapters.</i>
// *
// * @param index the start index of an unsigned short value in {@link #b b},
// * whose value is the index of a class constant pool item.
// * @param buf buffer to be used to read the item. This buffer must be
// * sufficiently large. It is not automatically resized.
// * @return the String corresponding to the specified class item.
// */
// public String readClass(final int index, final char[] buf) {
// // computes the start index of the CONSTANT_Class item in b
// // and reads the CONSTANT_Utf8 item designated by
// // the first two bytes of this CONSTANT_Class item
// return readUTF8(items[readUnsignedShort(index)], buf);
// }
//
// /**
// * Reads a numeric or string constant pool item in {@link #b b}. <i>This
// * method is intended for {@link Attribute} sub classes, and is normally not
// * needed by class generators or adapters.</i>
// *
// * @param item the index of a constant pool item.
// * @param buf buffer to be used to read the item. This buffer must be
// * sufficiently large. It is not automatically resized.
// * @return the {@link Integer}, {@link Float}, {@link Long},
// * {@link Double}, {@link String} or {@link Type} corresponding to
// * the given constant pool item.
// */
// public Object readConst(final int item, final char[] buf) {
// int index = items[item];
// switch (b[index - 1]) {
// case ClassWriter.INT:
// return new Integer(readInt(index));
// case ClassWriter.FLOAT:
// return new Float(Float.intBitsToFloat(readInt(index)));
// case ClassWriter.LONG:
// return new Long(readLong(index));
// case ClassWriter.DOUBLE:
// return new Double(Double.longBitsToDouble(readLong(index)));
// case ClassWriter.CLASS:
// return Type.getObjectType(readUTF8(index, buf));
// // case ClassWriter.STR:
// default:
// return readUTF8(index, buf);
// }
// }
}