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macros.h
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1 // © Copyright 2010 - 2014 BlackTopp Studios Inc.
2 /* This file is part of The Mezzanine Engine.
3 
4  The Mezzanine Engine is free software: you can redistribute it and/or modify
5  it under the terms of the GNU General Public License as published by
6  the Free Software Foundation, either version 3 of the License, or
7  (at your option) any later version.
8 
9  The Mezzanine Engine is distributed in the hope that it will be useful,
10  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  GNU General Public License for more details.
13 
14  You should have received a copy of the GNU General Public License
15  along with The Mezzanine Engine. If not, see <http://www.gnu.org/licenses/>.
16 */
17 /* The original authors have included a copy of the license specified above in the
18  'Docs' folder. See 'gpl.txt'
19 */
20 /* We welcome the use of the Mezzanine engine to anyone, including companies who wish to
21  Build professional software and charge for their product.
22 
23  However there are some practical restrictions, so if your project involves
24  any of the following you should contact us and we will try to work something
25  out:
26  - DRM or Copy Protection of any kind(except Copyrights)
27  - Software Patents You Do Not Wish to Freely License
28  - Any Kind of Linking to Non-GPL licensed Works
29  - Are Currently In Violation of Another Copyright Holder's GPL License
30  - If You want to change our code and not add a few hundred MB of stuff to
31  your distribution
32 
33  These and other limitations could cause serious legal problems if you ignore
34  them, so it is best to simply contact us or the Free Software Foundation, if
35  you have any questions.
36 
37  Joseph Toppi - toppij@gmail.com
38  John Blackwood - makoenergy02@gmail.com
39 */
40 #ifndef _macros_h
41 #define _macros_h
42 
43 ///////////////////////////////////////////////////////////////////////////////
44 /// @file
45 /// @brief All convience/utility macros for the Mezzanine are to be placed here.
46 ///////////////////////////////////////
47 
48 #include "datatypes.h"
49 
50 namespace Mezzanine
51 {
52  #ifndef MEZZ_BITMASK32MAX
53  #define MEZZ_BITMASK32MAX ( ~(UInt32(0)) )
54  #endif
55 
56  // This returns the value of the nth bit. Passing in zero always returns zero.
57  #ifndef MEZZ_BITMASK
58  #define MEZZ_BITMASK(X) ( (X) > 0 ? ( 1u << ( (X) - 1 ) ) : 0 )
59  #endif
60 
61  // This returns the value of a bit at the specified index. Passing in zero returns one.
62  /*#ifndef MEZZ_BITMASK_INDEX(X)
63  #define MEZZ_BITMASK_INDEX(X) ( 1u << X )
64  #endif//*/
65 }//Mezzanine
66 
67 #endif