Java Bit Unpack unpackBytes(String src)

Description

Unpacks data from string representation.

License

Open Source License

Parameter

Parameter	Description
src	packed data

Return

unpacked data

Declaration

public static byte[] unpackBytes(String src) 

Method Source Code

//package com.java2s;
/*/*from   w  w  w. j  a v a 2s.c om*/
 *   
 *
 * Copyright  1990-2009 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation.
 * 
 * This program 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 version 2 for more details (a copy is
 * included at /legal/license.txt).
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 */

public class Main {
    /**
     * Unpacks data from string representation.
     * @param src packed data
     * @return unpacked data
     */
    public static byte[] unpackBytes(String src) {

        byte[] data = src.getBytes();
        int srcLen, len;

        byte[] res = new byte[len = ((srcLen = data.length) >> 3) * 7 + (srcLen & 7) - 1];

        int i = 0;
        for (int k = len; k < srcLen; k++) {
            int mask = data[k];
            for (int j = 0; j < 7 && i < len; j++, i++) {
                res[i] = ((mask & (1 << j)) == 0) ? data[i] : (byte) (data[i] | 0x80);
            }
        }
        return res;
    }
}

Related

1. unpackByte(String bits)
2. unpackUnsignedByte(byte b)