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util.h
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1 /*
2  * RPLIDAR SDK
3  *
4  * Copyright (c) 2009 - 2014 RoboPeak Team
5  * http://www.robopeak.com
6  * Copyright (c) 2014 - 2016 Shanghai Slamtec Co., Ltd.
7  * http://www.slamtec.com
8  *
9  */
10 /*
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions are met:
13  *
14  * 1. Redistributions of source code must retain the above copyright notice,
15  * this list of conditions and the following disclaimer.
16  *
17  * 2. Redistributions in binary form must reproduce the above copyright notice,
18  * this list of conditions and the following disclaimer in the documentation
19  * and/or other materials provided with the distribution.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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33  */
34 
35 #pragma once
36 
37 
38 //------
39 /* _countof helper */
40 #if !defined(_countof)
41 #if !defined(__cplusplus)
42 #define _countof(_Array) (sizeof(_Array) / sizeof(_Array[0]))
43 #else
44 extern "C++"
45 {
46 template <typename _CountofType, size_t _SizeOfArray>
47 char (*__countof_helper( _CountofType (&_Array)[_SizeOfArray]))[_SizeOfArray];
48 #define _countof(_Array) sizeof(*__countof_helper(_Array))
49 }
50 #endif
51 #endif
52 
53 /* _offsetof helper */
54 #if !defined(offsetof)
55 #define offsetof(_structure, _field) ((_word_size_t)&(((_structure *)0x0)->_field))
56 #endif
57 
58 
59 #define BEGIN_STATIC_CODE( _blockname_ ) \
60  static class _static_code_##_blockname_ { \
61  public: \
62  _static_code_##_blockname_ ()
63 
64 
65 #define END_STATIC_CODE( _blockname_ ) \
66  } _instance_##_blockname_;
67 



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