Java Bit Get bits(long value, int sb, int eb)

Description

Extracts a bit range from a long value

License

Open Source License

Parameter

Parameter	Description
value	The bitmask
sb	The starting bit (inclusive)
eb	The ending bit (inclusive), must be < sb

Return

The extracted value

Declaration

public static long bits(long value, int sb, int eb) 

Method Source Code

//package com.java2s;
/*//from  w w  w  .j  av  a  2  s  .  co m
 * Copyright (C) 2011 Sony Ericsson Mobile Communications AB
 * Copyright (C) 2012-2013 Sony Mobile Communications AB
 *
 * This file is part of ChkBugReport.
 *
 * ChkBugReport is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * ChkBugReport is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ChkBugReport.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    /**
     * Extracts a bit range from a long value
     * @param value The bitmask
     * @param sb The starting bit (inclusive)
     * @param eb The ending bit (inclusive), must be < sb
     * @return The extracted value
     */
    public static long bits(long value, int sb, int eb) {
        value >>>= eb;
        sb -= eb - 1;
        long mask = (1L << sb) - 1;
        value &= mask;
        return value;
    }
}

Related

1. bits(int i)
2. bits(int n, int offset, int length)
3. bits(int value, int c)
4. bits(int value, int first, int last)
5. bits(long maxValue)