/*
 * Copyright (c) 2012, Codename One and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Codename One designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *  
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 * 
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Please contact Codename One through http://www.codenameone.com/ if you 
 * need additional information or have any questions.
 */
package net.sourceforge.retroweaver.runtime.java.lang;

/**
 *
 * @author Shai Almog
 */
public class Math_ {
    /**
     * Returns the result of rounding the argument to an integer. The result is
     * equivalent to {@code (long) Math.floor(d+0.5)}.
     * <p>
     * Special cases:
     * <ul>
     * <li>{@code round(+0.0) = +0.0}</li>
     * <li>{@code round(-0.0) = +0.0}</li>
     * <li>{@code round((anything > Long.MAX_VALUE) = Long.MAX_VALUE}</li>
     * <li>{@code round((anything < Long.MIN_VALUE) = Long.MIN_VALUE}</li>
     * <li>{@code round(+infintiy) = Long.MAX_VALUE}</li>
     * <li>{@code round(-infintiy) = Long.MIN_VALUE}</li>
     * <li>{@code round(NaN) = +0.0}</li>
     * </ul>
     * 
     * @param d
     *            the value to be rounded.
     * @return the closest integer to the argument.
     */
    public static long round(double d) {
        // check for NaN
        if (d != d) {
            return 0L;
        }
        return (long) Math.floor(d + 0.5d);
    }

    /**
     * Returns the result of rounding the argument to an integer. The result is
     * equivalent to {@code (int) Math.floor(f+0.5)}.
     * <p>
     * Special cases:
     * <ul>
     * <li>{@code round(+0.0) = +0.0}</li>
     * <li>{@code round(-0.0) = +0.0}</li>
     * <li>{@code round((anything > Integer.MAX_VALUE) = Integer.MAX_VALUE}</li>
     * <li>{@code round((anything < Integer.MIN_VALUE) = Integer.MIN_VALUE}</li>
     * <li>{@code round(+infintiy) = Integer.MAX_VALUE}</li>
     * <li>{@code round(-infintiy) = Integer.MIN_VALUE}</li>
     * <li>{@code round(NaN) = +0.0}</li>
     * </ul>
     * 
     * @param f
     *            the value to be rounded.
     * @return the closest integer to the argument.
     */
    public static int round(float f) {
        // check for NaN
        if (f != f) {
            return 0;
        }
        return (int) Math.floor(f + 0.5f);
    }
}