/*
* Firetweet - Twitter client for Android
*
* Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.getlantern.firetweet.util;
public class MathUtils {
public static float clamp(final float num, final float bound1, final float bound2) {
final float max = Math.max(bound1, bound2), min = Math.min(bound1, bound2);
return Math.max(Math.min(num, max), min);
}
public static int clamp(final int num, final int bound1, final int bound2) {
final int max = Math.max(bound1, bound2), min = Math.min(bound1, bound2);
return Math.max(Math.min(num, max), min);
}
// Returns the next power of two.
// Returns the input if it is already power of 2.
// Throws IllegalArgumentException if the input is <= 0 or
// the answer overflows.
public static int nextPowerOf2(int n) {
if (n <= 0 || n > 1 << 30) throw new IllegalArgumentException("n is invalid: " + n);
n -= 1;
n |= n >> 16;
n |= n >> 8;
n |= n >> 4;
n |= n >> 2;
n |= n >> 1;
return n + 1;
}
// Returns the previous power of two.
// Returns the input if it is already power of 2.
// Throws IllegalArgumentException if the input is <= 0
public static int prevPowerOf2(final int n) {
if (n <= 0) throw new IllegalArgumentException();
return Integer.highestOneBit(n);
}
}