Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
4973 | right-hear | 1 | /* |
2 | byteswap.h - C preprocessor macros for byte swapping. |
||
3 | Copyright (C) 1995, 1996 Michael Riepe |
||
4 | |||
5 | This library is free software; you can redistribute it and/or |
||
6 | modify it under the terms of the GNU Library General Public |
||
7 | License as published by the Free Software Foundation; either |
||
8 | version 2 of the License, or (at your option) any later version. |
||
9 | |||
10 | This library is distributed in the hope that it will be useful, |
||
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
||
13 | Library General Public License for more details. |
||
14 | |||
15 | You should have received a copy of the GNU Library General Public |
||
16 | License along with this library; if not, write to the Free Software |
||
17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
||
18 | */ |
||
19 | |||
20 | /* @(#) $Id: byteswap.h,v 1.2 1996/10/22 16:45:54 michael Exp $ */ |
||
21 | |||
22 | #ifndef _BYTESWAP_H |
||
23 | #define _BYTESWAP_H |
||
24 | |||
25 | #define lu(from,i,s) (((long)((unsigned char*)(from))[i])<<(s)) |
||
26 | #define li(from,i,s) (((long)((signed char*)(from))[i])<<(s)) |
||
27 | |||
28 | #define __load_u16L(from) ((unsigned long)(lu(from,1,8)|lu(from,0,0))) |
||
29 | #define __load_u16M(from) ((unsigned long)(lu(from,0,8)|lu(from,1,0))) |
||
30 | #define __load_i16L(from) ((long)(li(from,1,8)|lu(from,0,0))) |
||
31 | #define __load_i16M(from) ((long)(li(from,0,8)|lu(from,1,0))) |
||
32 | |||
33 | #define __load_u32L(from) ((unsigned long)(lu(from,3,24)| \ |
||
34 | lu(from,2,16)| \ |
||
35 | lu(from,1,8)| \ |
||
36 | lu(from,0,0))) |
||
37 | #define __load_u32M(from) ((unsigned long)(lu(from,0,24)| \ |
||
38 | lu(from,1,16)| \ |
||
39 | lu(from,2,8)| \ |
||
40 | lu(from,3,0))) |
||
41 | #define __load_i32L(from) ((long)(li(from,3,24)| \ |
||
42 | lu(from,2,16)| \ |
||
43 | lu(from,1,8)| \ |
||
44 | lu(from,0,0))) |
||
45 | #define __load_i32M(from) ((long)(li(from,0,24)| \ |
||
46 | lu(from,1,16)| \ |
||
47 | lu(from,2,8)| \ |
||
48 | lu(from,3,0))) |
||
49 | |||
50 | #define su(to,i,v,s) (((char*)(to))[i]=((unsigned long)(v)>>(s))) |
||
51 | #define si(to,i,v,s) (((char*)(to))[i]=((long)(v)>>(s))) |
||
52 | |||
53 | #define __store_u16L(to,v) (su(to,1,v,8),su(to,0,v,0)) |
||
54 | #define __store_u16M(to,v) (su(to,0,v,8),su(to,1,v,0)) |
||
55 | #define __store_i16L(to,v) (si(to,1,v,8),si(to,0,v,0)) |
||
56 | #define __store_i16M(to,v) (si(to,0,v,8),si(to,1,v,0)) |
||
57 | |||
58 | #define __store_u32L(to,v) (su(to,3,v,24), \ |
||
59 | su(to,2,v,16), \ |
||
60 | su(to,1,v,8), \ |
||
61 | su(to,0,v,0)) |
||
62 | #define __store_u32M(to,v) (su(to,0,v,24), \ |
||
63 | su(to,1,v,16), \ |
||
64 | su(to,2,v,8), \ |
||
65 | su(to,3,v,0)) |
||
66 | #define __store_i32L(to,v) (si(to,3,v,24), \ |
||
67 | si(to,2,v,16), \ |
||
68 | si(to,1,v,8), \ |
||
69 | si(to,0,v,0)) |
||
70 | #define __store_i32M(to,v) (si(to,0,v,24), \ |
||
71 | si(to,1,v,16), \ |
||
72 | si(to,2,v,8), \ |
||
73 | si(to,3,v,0)) |
||
74 | |||
75 | #endif /* _BYTESWAP_H */(s)) |