| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.hadoop.io; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"}) |
| @InterfaceStability.Unstable |
| public class BufferUtils { |
| public static int compare(DataInputBuffer buf1, DataInputBuffer buf2) { |
| byte[] b1 = buf1.getData(); |
| byte[] b2 = buf2.getData(); |
| int s1 = buf1.getPosition(); |
| int s2 = buf2.getPosition(); |
| int l1 = buf1.getLength(); |
| int l2 = buf2.getLength(); |
| return FastByteComparisons.compareTo(b1, s1, l1, b2, s2, l2); |
| } |
| |
| public static int compare(DataOutputBuffer buf1, DataOutputBuffer buf2) { |
| byte[] b1 = buf1.getData(); |
| byte[] b2 = buf2.getData(); |
| int s1 = 0; |
| int s2 = 0; |
| int l1 = buf1.getLength(); |
| int l2 = buf2.getLength(); |
| return FastByteComparisons.compareTo(b1, s1, l1, b2, s2, l2); |
| } |
| |
| public static int compare(DataInputBuffer buf1, DataOutputBuffer buf2) { |
| byte[] b1 = buf1.getData(); |
| byte[] b2 = buf2.getData(); |
| int s1 = buf1.getPosition(); |
| int s2 = 0; |
| int l1 = buf1.getLength(); |
| int l2 = buf2.getLength(); |
| return FastByteComparisons.compareTo(b1, s1, l1, b2, s2, l2); |
| } |
| |
| public static int compare(DataOutputBuffer buf1, DataInputBuffer buf2) { |
| return compare(buf2, buf1); |
| } |
| |
| public static void copy(DataInputBuffer src, DataOutputBuffer dst) |
| throws IOException { |
| byte[] b1 = src.getData(); |
| int s1 = src.getPosition(); |
| int l1 = src.getLength(); |
| dst.reset(); |
| dst.write(b1, s1, l1 - s1); |
| } |
| |
| public static void copy(DataOutputBuffer src, DataOutputBuffer dst) |
| throws IOException { |
| byte[] b1 = src.getData(); |
| int s1 = 0; |
| int l1 = src.getLength(); |
| dst.reset(); |
| dst.write(b1, s1, l1); |
| } |
| |
| } |