1 /*
2  * Copyright (C) 2007 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.internal.util;
18 
19 import android.compat.annotation.UnsupportedAppUsage;
20 
21 /**
22  * Fast and loose math routines.
23  */
24 public class FastMath {
25 
26     /**
27      * Fast round from float to int. This is faster than Math.round()
28      * thought it may return slightly different results. It does not try to
29      * handle (in any meaningful way) NaN or infinities.
30      */
31     @UnsupportedAppUsage
round(float value)32     public static int round(float value) {
33         long lx = (long) (value * (65536 * 256f));
34         return (int) ((lx + 0x800000) >> 24);
35     }
36 }
37