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comparison src/main/gov/nasa/jpf/util/ExpGrowth.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
4 * All rights reserved.
5 *
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0.
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package gov.nasa.jpf.util;
19
20 public class ExpGrowth implements Growth {
21 final float factor;
22 final float sqFactor;
23 final int plus;
24
25 public ExpGrowth(float factor, int plus) {
26 if (factor < 1.001F || factor > 100.F) {
27 throw new IllegalArgumentException();
28 }
29 this.factor = factor;
30 this.sqFactor = (float) Math.sqrt(factor);
31 this.plus = plus;
32 }
33
34 public ExpGrowth(float factor) {
35 this(factor,7);
36 }
37
38 @Override
39 public int grow(int oldSize, int minNewSize) {
40 int newSize = (int)(factor * oldSize) + plus;
41 if (newSize < minNewSize) {
42 newSize = (int)(sqFactor * minNewSize) + plus;
43 }
44 return newSize;
45 }
46 }