Android ByteBuffer to Long Convert readLong(ByteBuffer in, final int fitInBytes)

Description

Read long which was written to fitInBytes bytes and increment position.

License

Apache License

Parameter

Parameter	Description
fitInBytes	In how many bytes given long is stored.

Return

The value of parsed long.

Declaration

public static long readLong(ByteBuffer in, final int fitInBytes) 

Method Source Code

//package com.java2s;
/*//from  ww w . j a  v a 2  s .c  om
 * 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.
 */

import java.io.IOException;
import java.io.InputStream;

import java.nio.ByteBuffer;

public class Main {
    /**
     * Read long which was written to fitInBytes bytes and increment position.
     * @param fitInBytes In how many bytes given long is stored.
     * @return The value of parsed long.
     * @throws IOException
     */
    public static long readLong(InputStream in, final int fitInBytes)
            throws IOException {
        long tmpLong = 0;
        for (int i = 0; i < fitInBytes; ++i) {
            tmpLong |= (in.read() & 0xffl) << (8 * i);
        }
        return tmpLong;
    }

    /**
     * Read long which was written to fitInBytes bytes and increment position.
     * @param fitInBytes In how many bytes given long is stored.
     * @return The value of parsed long.
     */
    public static long readLong(ByteBuffer in, final int fitInBytes) {
        long tmpLength = 0;
        for (int i = 0; i < fitInBytes; ++i) {
            tmpLength |= (in.get() & 0xffl) << (8l * i);
        }
        return tmpLength;
    }
}

Related

1. writeVLong(ByteBuffer out, long i)