Helper.java

/*******************************************************************************
 * Copyright 2012 Keith Johnson
 * 
 * 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 com.ubergeek42.weechat;

/**
 * Provides some helper functions that are required by the library
 * 
 * @author ubergeek42<kj@ubergeek42.com>
 * 
 */
public class Helper {
    // Basically Arrays.copyOfRange, included as android 2.1 is missing this
    // See http://stackoverflow.com/a/7970678 (taken from the OpenJDK source)
    public static byte[] copyOfRange(byte[] original, int from, int to) {
        int newLength = to - from;
        if (newLength < 0) {
            throw new IllegalArgumentException(from + " > " + to);
        }
        byte[] copy = new byte[newLength];
        System.arraycopy(original, from, copy, 0, Math.min(original.length - from, newLength));
        return copy;
    }
}