jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/jvm/Pool.java@24a47c3062fe (annotated)

src/share/classes/com/sun/tools/javac/jvm/Pool.java@24a47c3062fe (annotated)

src/share/classes/com/sun/tools/javac/jvm/Pool.java

Thu, 02 Oct 2008 19:58:40 -0700

author: xdono
date: Thu, 02 Oct 2008 19:58:40 -0700
changeset 117: 24a47c3062fe
parent 104: 5e89c4ca637c
child 554: 9d9f26857129
permissions: -rw-r--r--

6754988: Update copyright year
Summary: Update for files that have been modified starting July 2008
Reviewed-by: ohair, tbell

 /*
  * Copyright 1999-2008 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.javac.jvm;
 import java.util.*;
 import com.sun.tools.javac.code.Symbol.*;
 /** An internal structure that corresponds to the constant pool of a classfile.
  *
  *  <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 Pool {
     public static final int MAX_ENTRIES = 0xFFFF;
     public static final int MAX_STRING_LENGTH = 0xFFFF;
     /** Index of next constant to be entered.
      */
     int pp;
     /** The initial pool buffer.
      */
     Object[] pool;
     /** A hashtable containing all constants in the pool.
      */
     Map<Object,Integer> indices;
     /** Construct a pool with given number of elements and element array.
      */
     public Pool(int pp, Object[] pool) {
         this.pp = pp;
         this.pool = pool;
         this.indices = new HashMap<Object,Integer>(pool.length);
         for (int i = 1; i < pp; i++) {
             if (pool[i] != null) indices.put(pool[i], i);
         }
     }
     /** Construct an empty pool.
      */
     public Pool() {
         this(1, new Object[64]);
     }
     /** Return the number of entries in the constant pool.
      */
     public int numEntries() {
         return pp;
     }
     /** Remove everything from this pool.
      */
     public void reset() {
         pp = 1;
         indices.clear();
     }
     /** Double pool buffer in size.
      */
     private void doublePool() {
         Object[] newpool = new Object[pool.length * 2];
         System.arraycopy(pool, 0, newpool, 0, pool.length);
         pool = newpool;
     }
     /** Place an object in the pool, unless it is already there.
      *  If object is a symbol also enter its owner unless the owner is a
      *  package.  Return the object's index in the pool.
      */
     public int put(Object value) {
         if (value instanceof MethodSymbol)
             value = new Method((MethodSymbol)value);
         else if (value instanceof VarSymbol)
             value = new Variable((VarSymbol)value);
 //      assert !(value instanceof Type.TypeVar);
         Integer index = indices.get(value);
         if (index == null) {
 //          System.err.println("put " + value + " " + value.getClass());//DEBUG
             index = pp;
             indices.put(value, index);
             if (pp == pool.length) doublePool();
             pool[pp++] = value;
             if (value instanceof Long || value instanceof Double) {
                 if (pp == pool.length) doublePool();
                 pool[pp++] = null;
             }
         }
         return index.intValue();
     }
     /** Return the given object's index in the pool,
      *  or -1 if object is not in there.
      */
     public int get(Object o) {
         Integer n = indices.get(o);
         return n == null ? -1 : n.intValue();
     }
     static class Method extends DelegatedSymbol {
         MethodSymbol m;
         Method(MethodSymbol m) {
             super(m);
             this.m = m;
         }
         public boolean equals(Object other) {
             if (!(other instanceof Method)) return false;
             MethodSymbol o = ((Method)other).m;
             return
                 o.name == m.name &&
                 o.owner == m.owner &&
                 o.type.equals(m.type);
         }
         public int hashCode() {
             return
                 m.name.hashCode() * 33 +
                 m.owner.hashCode() * 9 +
                 m.type.hashCode();
         }
     }
     static class Variable extends DelegatedSymbol {
         VarSymbol v;
         Variable(VarSymbol v) {
             super(v);
             this.v = v;
         }
         public boolean equals(Object other) {
             if (!(other instanceof Variable)) return false;
             VarSymbol o = ((Variable)other).v;
             return
                 o.name == v.name &&
                 o.owner == v.owner &&
                 o.type.equals(v.type);
         }
         public int hashCode() {
             return
                 v.name.hashCode() * 33 +
                 v.owner.hashCode() * 9 +
                 v.type.hashCode();
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/jvm/Pool.java@24a47c3062fe (annotated)

src/share/classes/com/sun/tools/javac/jvm/Pool.java