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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.

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/*
 * 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 com.feilong.lib.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++;
    }
}