EndianHandler.java :  » Game » Jake2-0.9.5 » Jake2 » game » Java Open Source

/*
 * AbstractEndianHandler.java
 * Copyright (C) 2003
 * 
 * $Id: EndianHandler.java,v 1.2 2004/07/08 15:58:43 hzi Exp $
 */
/*
Copyright (C) 1997-2001 Id Software, Inc.

This program 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.

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 for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
package jake2.game;

public abstract class EndianHandler
{
  private static final int mask = 0xFF;

  abstract public float BigFloat(float f);
  abstract public short BigShort(short s);
  abstract public int BigLong(int i);
  abstract public float LittleFloat(float f);
  abstract public short LittleShort(short s);
  abstract public int LittleLong(int i);

  public static float swapFloat(float f)
  {
    int i = Float.floatToRawIntBits(f);
    i = swapInt(i);
    f = Float.intBitsToFloat(i);

    return f;
  }

  public static int swapInt(int i)
  {

    int a = i & mask;
    i >>>= 8;

    a <<= 24;

    int b = i & mask;

    i >>>= 8;
    b <<= 16;

    int c = i & mask;
    i >>>= 8;
    c <<= 8;

    return i | c | b | a;
  }

  public static short swapShort(short s)
  {
    int a = s & mask;
    a <<= 8;
    int b = (s >>> 8) & mask;

    return (short) (b | a);
  }
}