kc3-lang/brotli/java/dec/Utils.java

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• Hash : 5025365d
  Author :
  Date : 2016-10-17T14:04:59
  

  Add Java port of Brotli decoder.
  

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• java/dec/Utils.java

• /* 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;
      }
    }
  }
  

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