jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/classfile/Code

src/share/classes/com/sun/tools/classfile/Code_attribute.java@664edca41e34 (annotated)

src/share/classes/com/sun/tools/classfile/Code_attribute.java

Fri, 26 Jun 2009 19:12:41 -0700

author: jjg
date: Fri, 26 Jun 2009 19:12:41 -0700
changeset 309: 664edca41e34
parent 255: 07da2ffbb76b
child 554: 9d9f26857129
permissions: -rw-r--r--

6855544: add missing files
Reviewed-by: jjg, mcimadamore, darcy
Contributed-by: mernst@cs.washington.edu, mali@csail.mit.edu, mpapi@csail.mit.edu

 /*
  * Copyright 2007-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Sun designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Sun in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  */
 package com.sun.tools.classfile;
 import java.io.IOException;
 import java.util.Iterator;
 import java.util.NoSuchElementException;
 /**
  * See JVMS3, section 4.8.3.
  *
  *  <p><b>This is NOT part of any API supported by Sun Microsystems.  If
  *  you write code that depends on this, you do so at your own risk.
  *  This code and its internal interfaces are subject to change or
  *  deletion without notice.</b>
  */
 public class Code_attribute extends Attribute {
     public class InvalidIndex extends AttributeException {
         private static final long serialVersionUID = -8904527774589382802L;
         InvalidIndex(int index) {
             this.index = index;
         }
         @Override
         public String getMessage() {
             // i18n
             return "invalid index " + index + " in Code attribute";
         }
         public final int index;
     }
     Code_attribute(ClassReader cr, int name_index, int length)
             throws IOException, ConstantPoolException {
         super(name_index, length);
         max_stack = cr.readUnsignedShort();
         max_locals = cr.readUnsignedShort();
         code_length = cr.readInt();
         code = new byte[code_length];
         cr.readFully(code);
         exception_table_langth = cr.readUnsignedShort();
         exception_table = new Exception_data[exception_table_langth];
         for (int i = 0; i < exception_table_langth; i++)
             exception_table[i] = new Exception_data(cr);
         attributes = new Attributes(cr);
     }
     public int getByte(int offset) throws InvalidIndex {
         if (offset < 0 || offset >= code.length)
             throw new InvalidIndex(offset);
         return code[offset];
     }
     public int getUnsignedByte(int offset) throws InvalidIndex {
         if (offset < 0 || offset >= code.length)
             throw new InvalidIndex(offset);
         return code[offset] & 0xff;
     }
     public int getShort(int offset) throws InvalidIndex {
         if (offset < 0 || offset + 1 >= code.length)
             throw new InvalidIndex(offset);
         return (code[offset] << 8) | (code[offset + 1] & 0xFF);
     }
     public int getUnsignedShort(int offset) throws InvalidIndex {
         if (offset < 0 || offset + 1 >= code.length)
             throw new InvalidIndex(offset);
         return ((code[offset] << 8) | (code[offset + 1] & 0xFF)) & 0xFFFF;
     }
     public int getInt(int offset) throws InvalidIndex {
         if (offset < 0 || offset + 3 >= code.length)
             throw new InvalidIndex(offset);
         return (getShort(offset) << 16) | (getShort(offset + 2) & 0xFFFF);
     }
     public <R, D> R accept(Visitor<R, D> visitor, D data) {
         return visitor.visitCode(this, data);
     }
     public Iterable<Instruction> getInstructions() {
         return new Iterable<Instruction>() {
             public Iterator<Instruction> iterator() {
                 return new Iterator<Instruction>() {
                     public boolean hasNext() {
                         return (next != null);
                     }
                     public Instruction next() {
                         if (next == null)
                             throw new NoSuchElementException();
                         current = next;
                         pc += current.length();
                         next = (pc < code.length ? new Instruction(code, pc) : null);
                         return current;
                     }
                     public void remove() {
                         throw new UnsupportedOperationException("Not supported.");
                     }
                     Instruction current = null;
                     int pc = 0;
                     Instruction next = new Instruction(code, pc);
                 };
             }
         };
     }
     public final int max_stack;
     public final int max_locals;
     public final int code_length;
     public final byte[] code;
     public final int exception_table_langth;
     public final Exception_data[] exception_table;
     public final Attributes attributes;
     public class Exception_data {
         Exception_data(ClassReader cr) throws IOException {
             start_pc = cr.readUnsignedShort();
             end_pc = cr.readUnsignedShort();
             handler_pc = cr.readUnsignedShort();
             catch_type = cr.readUnsignedShort();
         }
         public final int start_pc;
         public final int end_pc;
         public final int handler_pc;
         public final int catch_type;
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/classfile/Code_attribute.java@664edca41e34 (annotated)

src/share/classes/com/sun/tools/classfile/Code_attribute.java