Java Array Unpack UnpackFloat(byte[] bytes, float value)

Description

Unpacks a floating-point value into four bytes.

License

Open Source License

Parameter

Parameter	Description
bytes	a parameter
value	a parameter

Declaration

public static byte[] UnpackFloat(byte[] bytes, float value) 

Method Source Code

//package com.java2s;
/*// www. ja v  a2  s  .  c  om
 * jNoiseLib [https://github.com/andrewgp/jLibNoise]
 * Original code from libnoise [https://github.com/andrewgp/jLibNoise]
 *
 * Copyright (C) 2003, 2004 Jason Bevins
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at
 * your option) any later version.
 *
 * This library 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 Lesser General Public
 * License (COPYING.txt) for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * The developer's email is jlbezigvins@gmzigail.com (for great email, take
 * off every 'zig'.)
 */

public class Main {
    /**
     * Unpacks a floating-point value into four bytes.  This function is
     * specific to Intel machines.  A portable version will come soon (I hope.)
     *
     * @param bytes
     * @param value
     * @return
     */
    public static byte[] UnpackFloat(byte[] bytes, float value) {
        int intBits = Float.floatToRawIntBits(value);
        return UnpackLittle32(bytes, intBits);
    }

    /**
     * Unpacks a 32-bit integer value into four bytes in BIG endian format.
     * 
     * @param bytes
     * @param integer
     * @return
     */
    public static byte[] UnpackLittle32(byte[] bytes, int integer) {
        bytes[3] = (byte) ((integer & 0x000000ff));
        bytes[2] = (byte) ((integer & 0x0000ff00) >> 8);
        bytes[1] = (byte) ((integer & 0x00ff0000) >> 16);
        bytes[0] = (byte) ((integer & 0xff000000) >> 24);
        return bytes;
    }
}

Related

1. unpack(byte[] bytes)
2. unpack(double[] packed, int width, int height, int outputIndex)
3. unpack(int[] sourcearray, int arraypos, int[] data, int datapos, int num, int b)
4. unpackBCD(byte[] source)
5. unpackDie(byte[] bytes)
6. UnpackFloatBuffer(byte[] buffer, long bytes_read, long num_loaded, float[] list)
7. unpackInt(byte[] data, int offset)
8. unpackIntegerByWidth(int len, byte[] buf, int offset)
9. unpackLE(long aValue, byte[] aBuf, int aOffset)