scouter.javassist.bytecode.LongVector Maven / Gradle / Ivy
/*
* 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++;
}
}