Here you can find the source of nextPowerOfTwoValue(double value)
| Parameter | Description |
|---|---|
| value | to use |
public static int nextPowerOfTwoValue(double value)
//package com.java2s; /*---------------------------------------------------------------------------- This file is part of deegree, http://deegree.org/ Copyright (C) 2001-2009 by:// w w w . j a v a 2 s . c om Department of Geography, University of Bonn and lat/lon GmbH This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Contact information: lat/lon GmbH Aennchenstr. 19, 53177 Bonn Germany http://lat-lon.de/ Department of Geography, University of Bonn Prof. Dr. Klaus Greve Postfach 1147, 53001 Bonn Germany http://www.geographie.uni-bonn.de/deegree/ e-mail: info@deegree.org ----------------------------------------------------------------------------*/ public class Main { /** * */ public static final double EPSILON = 1E-10; /** * This method will return the next power of two for the given value, e.g. if value is 511 it will return 512, if * value is 513 it will return 1024. * * @param value * to use * @return the next power of two of the given value */ public static int nextPowerOfTwoValue(double value) { int power = previousPowerOfTwo(value); return 1 << power; } /** * This method will return the next power, two must be raised too to give the next power of two, e.g. if value is * 511 it will return 9, if value is 513 it will return 10. * * @param value * to use * @return the next power to the base of two the given value has */ public static int previousPowerOfTwo(double value) { int result = 0; int power = 1; while (power <= value && Math.abs(value - power) > EPSILON) { power = power << 1; result++; } return result; } }