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