1 ////////////////////////////////////////////////////////////////////////////////
2 // MillScript-Excel: an Open Spice interpreter and batch website creation tool
3 // Copyright (C) 2006 Open World Ltd, Kevin Rogers
4 //
5 // This file is part of MillScript-Excel.
6 //
7 // MillScript-Excel is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU General Public License as published by the Free
9 // Software Foundation; either version 2 of the License, or (at your option)
10 // any later version.
11 //
12 // MillScript-Excel is distributed in the hope that it will be useful, but WITHOUT
13 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 // more details.
16 //
17 // You should have received a copy of the GNU General Public License along with
18 // MillScript-Excel; if not, write to the Free Software Foundation, Inc., 59 Temple
19 // Place, Suite 330, Boston, MA 02111-1307 USA
20 ////////////////////////////////////////////////////////////////////////////////
21 package org.millscript.office.endianness;
22
23 /**
24 * This class provides support for reading information stored with a little
25 * endian byte order.
26 */
27 public class LittleEndianDecoder extends EndianDecoder {
28
29 public static final LittleEndianDecoder DECODER = new LittleEndianDecoder();
30
31 /**
32 * @see org.millscript.office.endianness.EndianDecoder#decode8ByteLong(byte[], int)
33 */
34 @Override
35 public long decode8ByteLong( final byte[] bytes, final int offset ) {
36 return this.decode4ByteInt( bytes, offset )
37 | ( ( (long) this.decode4ByteInt( bytes, offset + 4 ) ) << 32 );
38 }
39
40 /**
41 * @see org.millscript.office.endianness.EndianDecoder#decodeInt(byte, byte)
42 */
43 @Override
44 public int decodeInt( final byte byte1, final byte byte2 ) {
45 return ( byte1 & 0xFF ) | ( ( byte2 & 0xFF ) << 8 );
46 }
47
48 /**
49 * @see org.millscript.office.endianness.EndianDecoder#decodeInt(byte, byte, byte, byte)
50 */
51 @Override
52 public int decodeInt( final byte b1, final byte b2, final byte b3, final byte b4 ) {
53 return ( b1 & 0xFF ) | ( ( b2 & 0xFF ) << 8 ) | ( ( b3 & 0xFF ) << 16 ) | ( ( b4 & 0xFF ) << 24 );
54 }
55
56 }