1 /* 2 * Copyright (C) 2018 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 package libcore.util; 17 18 /** 19 * @hide 20 */ 21 public final class ArrayUtils { ArrayUtils()22 private ArrayUtils() {} 23 24 /** 25 * Throws {@link ArrayIndexOutOfBoundsException} if the range is out of bounds. 26 * @param len length of the array. Must be non-negative 27 * @param offset start index of the range. Must be non-negative 28 * @param count length of the range. Must be non-negative 29 * @throws ArrayIndexOutOfBoundsException if the range from {@code offset} with length 30 * {@code count} is out of bounds of the array 31 */ throwsIfOutOfBounds(int len, int offset, int count)32 public static void throwsIfOutOfBounds(int len, int offset, int count) { 33 if (len < 0) { 34 throw new ArrayIndexOutOfBoundsException("Negative length: " + len); 35 } 36 37 if ((offset | count) < 0 || offset > len - count) { 38 throw new ArrayIndexOutOfBoundsException( 39 "length=" + len + "; regionStart=" + offset + "; regionLength=" + count); 40 } 41 } 42 } 43