1 /*
2 * Copyright (c) 2009, The MilkyTracker Team.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * - Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * - Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * - Neither the name of the <ORGANIZATION> nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "LittleEndian.h"
31
32 //////////////////////////////////////////////////////////////////////////
33 // system independent loading of little endian numbers //
34 //////////////////////////////////////////////////////////////////////////
GET_WORD(const void * ptr)35 mp_uword LittleEndian::GET_WORD(const void* ptr)
36 {
37 const mp_ubyte* buffer = (const mp_ubyte*)ptr;
38 return ((mp_uword)buffer[0]+((mp_uword)buffer[1]<<8));
39 }
40
GET_DWORD(const void * ptr)41 mp_uint32 LittleEndian::GET_DWORD(const void* ptr)
42 {
43 const mp_ubyte* buffer = (const mp_ubyte*)ptr;
44 return ((mp_uint32)buffer[0]+((mp_uint32)buffer[1]<<8)+((mp_uint32)buffer[2]<<16)+((mp_uint32)buffer[3]<<24));
45 }
46
47 //////////////////////////////////////////////////////////////////////////
48 // system independent loading of big endian numbers //
49 //////////////////////////////////////////////////////////////////////////
GET_WORD(const void * ptr)50 mp_uword BigEndian::GET_WORD(const void* ptr)
51 {
52 const mp_ubyte* buffer = (const mp_ubyte*)ptr;
53 return ((mp_uword)buffer[1]+((mp_uword)buffer[0]<<8));
54 }
55
GET_DWORD(const void * ptr)56 mp_uint32 BigEndian::GET_DWORD(const void* ptr)
57 {
58 const mp_ubyte* buffer = (const mp_ubyte*)ptr;
59 return ((mp_uint32)buffer[3]+((mp_uint32)buffer[2]<<8)+((mp_uint32)buffer[1]<<16)+((mp_uint32)buffer[0]<<24));
60 }
61