Java Type Size sizeOfVarint(int value)

Description

Number of bytes needed to encode an integer in variable-length format.

License

Apache License

Parameter

Parameter	Description
value	The signed value

Declaration

public static int sizeOfVarint(int value) 

Method Source Code

//package com.java2s;
/*/* w w  w.  j a  v a2s  .c  o  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 {
    /**
     * Number of bytes needed to encode an integer in variable-length format.
     *
     * @param value The signed value
     */
    public static int sizeOfVarint(int value) {
        int v = (value << 1) ^ (value >> 31);
        int bytes = 1;
        while ((v & 0xffffff80) != 0L) {
            bytes += 1;
            v >>>= 7;
        }
        return bytes;
    }
}

Related

1. sizeOfInt(int x)
2. sizeOfInVarInt32(int length)
3. sizeOfPrimitive(Object object)
4. sizeOfPrimitiveArray(Object object)
5. sizeOfTreeMap(int size)
6. sizeOfWriteLength(int len)