EVE 1.0
packed-sizeof.h
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1 #ifndef PACKED_SIZEOF_H_INCLUDED
2 #define PACKED_SIZEOF_H_INCLUDED
3 /**********************************************************************/
4 /*
5  * Copyright (c) 2014-2015, Jetro AS
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without modification,
9  * are permitted provided that the following conditions are met:
10  *
11  * 1. Redistributions of source code must retain the above copyright notice,
12  * this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright notice,
14  * this list of conditions and the following disclaimer in the documentation
15  * and/or other materials provided with the distribution.
16  * 3. The name of the author may not be used to endorse or promote products
17  * derived from this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONRIBUTORS ``AS IS'' AND ANY EXPRESS
20  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
22  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
24  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
27  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
28  * OF SUCH DAMAGE.
29  *
30  * This file is part of the EVE platform.
31  */
32 
33 /**
34  * \file
35  * @brief A part of TOC table compile-time generator
36  *
37  * @author DT, Jetro AS
38  */ /******************************************************************/
39 
40 #include <stddef.h>
41 
42 /* Packed version of sizeof */
43 template<class T>
44 static constexpr size_t packed_sizeof(const T &t)
45 {
46  struct P : private T { char p[1]; };
47  return offsetof(P, p);
48 }
49 
50 #endif