| /* Copyright 2015 Google Inc. All Rights Reserved. |
| |
| Distributed under MIT license. |
| See file LICENSE for detail or copy at https://opensource.org/licenses/MIT |
| */ |
| |
| package org.brotli.dec; |
| |
| /** |
| * A set of utility methods. |
| */ |
| final class Utils { |
| |
| private static final byte[] BYTE_ZEROES = new byte[1024]; |
| |
| private static final int[] INT_ZEROES = new int[1024]; |
| |
| /** |
| * Fills byte array with zeroes. |
| * |
| * <p> Current implementation uses {@link System#arraycopy}, so it should be used for length not |
| * less than 16. |
| * |
| * @param dest array to fill with zeroes |
| * @param offset the first byte to fill |
| * @param length number of bytes to change |
| */ |
| static void fillWithZeroes(byte[] dest, int offset, int length) { |
| int cursor = 0; |
| while (cursor < length) { |
| int step = Math.min(cursor + 1024, length) - cursor; |
| System.arraycopy(BYTE_ZEROES, 0, dest, offset + cursor, step); |
| cursor += step; |
| } |
| } |
| |
| /** |
| * Fills int array with zeroes. |
| * |
| * <p> Current implementation uses {@link System#arraycopy}, so it should be used for length not |
| * less than 16. |
| * |
| * @param dest array to fill with zeroes |
| * @param offset the first item to fill |
| * @param length number of item to change |
| */ |
| static void fillWithZeroes(int[] dest, int offset, int length) { |
| int cursor = 0; |
| while (cursor < length) { |
| int step = Math.min(cursor + 1024, length) - cursor; |
| System.arraycopy(INT_ZEROES, 0, dest, offset + cursor, step); |
| cursor += step; |
| } |
| } |
| } |