75263f25 |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: bitops.h,v 1.1 2002/10/19 17:56:50 mdw Exp $ |
4 | * |
5 | * Bit operations by truth table |
6 | * |
7 | * (c) 2002 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Catacomb. |
13 | * |
14 | * Catacomb is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * Catacomb is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with Catacomb; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: bitops.h,v $ |
33 | * Revision 1.1 2002/10/19 17:56:50 mdw |
34 | * Fix bit operations. Test them (a bit) better. |
35 | * |
36 | */ |
37 | |
38 | #ifndef CATACOMB_BITOPS_H |
39 | #define CATACOMB_BITOPS_H |
40 | |
41 | #ifdef __cplusplus |
42 | extern "C" { |
43 | #endif |
44 | |
45 | /*----- Macros ------------------------------------------------------------*/ |
46 | |
47 | #define B0000(x, y) (0u) |
48 | #define B0001(x, y) ((x) & (y)) |
49 | #define B0010(x, y) ((x) & ~(y)) |
50 | #define B0011(x, y) (x) |
51 | #define B0100(x, y) (~(x) & (y)) |
52 | #define B0101(x, y) (y) |
53 | #define B0110(x, y) ((x) ^ (y)) |
54 | #define B0111(x, y) ((x) | (y)) |
55 | #define B1000(x, y) (~((x) | (y))) |
56 | #define B1001(x, y) (~((x) ^ (y))) |
57 | #define B1010(x, y) (~(y)) |
58 | #define B1011(x, y) ((x) | ~(y)) |
59 | #define B1100(x, y) (~(x)) |
60 | #define B1101(x, y) (~(x) | (y)) |
61 | #define B1110(x, y) (~((x) & (y))) |
62 | #define B1111(x, y) (~0u) |
63 | |
64 | /*----- That's all, folks -------------------------------------------------*/ |
65 | |
66 | #ifdef __cplusplus |
67 | } |
68 | #endif |
69 | |
70 | #endif |