/*
    * Javassist, a Java-bytecode translator toolkit.
    * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
    *
    * The contents of this file are subject to the Mozilla Public License Version
    * 1.1 (the "License"); you may not use this file except in compliance with
    * the License.  Alternatively, the contents of this file may be used under
    * the terms of the GNU Lesser General Public License Version 2.1 or later,
    * or the Apache License Version 2.0.
   *
   * Software distributed under the License is distributed on an "AS IS" basis,
   * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
   * for the specific language governing rights and limitations under the
   * License.
   */
  
  package scouter.javassist.bytecode;
  
  
  final class LongVector {
      static final int ASIZE = 128;
      static final int ABITS = 7;  // ASIZE = 2^ABITS
      static final int VSIZE = 8;
      private ConstInfo[][] objects;
      private int elements;
  
      public LongVector() {
          objects = new ConstInfo[VSIZE][];
          elements = 0;
      }
  
      public LongVector(int initialSize) {
          int vsize = ((initialSize >> ABITS) & ~(VSIZE - 1)) + VSIZE;
          objects = new ConstInfo[vsize][];
          elements = 0;
      }
  
      public int size() { return elements; }
  
      public int capacity() { return objects.length * ASIZE; }
  
      public ConstInfo elementAt(int i) {
          if (i < 0 || elements <= i)
              return null;
  
          return objects[i >> ABITS][i & (ASIZE - 1)];
      }
  
      public void addElement(ConstInfo value) {
          int nth = elements >> ABITS;
          int offset = elements & (ASIZE - 1);
          int len = objects.length;
          if (nth >= len) { 
              ConstInfo[][] newObj = new ConstInfo[len + VSIZE][];
              System.arraycopy(objects, 0, newObj, 0, len);
              objects = newObj;
          }
  
          if (objects[nth] == null)
              objects[nth] = new ConstInfo[ASIZE];
  
          objects[nth][offset] = value;
          elements++;
      }
  }