Android Long to Byte Array Convert longFitsIn(final long value)

Description

Check how many bytes are required to store value.

License

Apache License

Parameter

Parameter	Description
value	Value which size will be tested.

Return

How many bytes are required to store value.

Declaration

public static int longFitsIn(final long value) 

Method Source Code

//package com.java2s;
/*//from  w  w w  .ja v  a  2 s  .  co m
 * 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.
 */

public class Main {
    /**
     * Check how many bytes are required to store value.
     * @param value Value which size will be tested.
     * @return How many bytes are required to store value.
     */
    public static int longFitsIn(final long value) {
        if (value < 0) {
            return 8;
        }

        if (value < (1l << 4 * 8)) {
            // no more than 4 bytes
            if (value < (1l << 2 * 8)) {
                if (value < (1l << 1 * 8)) {
                    return 1;
                }
                return 2;
            }
            if (value < (1l << 3 * 8)) {
                return 3;
            }
            return 4;
        }
        // more than 4 bytes
        if (value < (1l << 6 * 8)) {
            if (value < (1l << 5 * 8)) {
                return 5;
            }
            return 6;
        }
        if (value < (1l << 7 * 8)) {
            return 7;
        }
        return 8;
    }
}

Related

1. long2bytesBE(long val, byte[] b, int off)
2. long2bytesLE(long val, byte[] b, int off)
3. longToByteArray(long a)
4. longToByteArray(long l)
5. longToByteArray(long value)
6. longToBytes(long l)