geode-redis/src/main/java/org/apache/geode/internal/hll/Bits.java

/*
 * Copyright (C) 2011 Clearspring Technologies, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package org.apache.geode.internal.hll;

import java.io.ByteArrayInputStream;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.IOException;

public class Bits {

  public static int[] getBits(byte[] mBytes) throws IOException {
    int bitSize = mBytes.length / 4;
    int[] bits = new int[bitSize];
    DataInputStream dis = new DataInputStream(new ByteArrayInputStream(mBytes));
    for (int i = 0; i < bitSize; i++) {
      bits[i] = dis.readInt();
    }
    return bits;
  }

  /**
   * This method might be better described as "byte array to int array" or "data input to int
   * array"
   */
  public static int[] getBits(DataInput dataIn, int byteLength) throws IOException {
    int bitSize = byteLength / 4;
    int[] bits = new int[bitSize];
    for (int i = 0; i < bitSize; i++) {
      bits[i] = dataIn.readInt();
    }
    return bits;
  }

}