An Overlay-based
Virtual Network Substrate
SpoVNet

source: source/ariba/utility/vtypes/detail/helper.hpp @ 10700

Last change on this file since 10700 was 10700, checked in by Michael Tänzer, 8 years ago

Merge CMake branch into trunk

File size: 3.4 KB
Line 
1// helper.hpp, created on 04.11.2008 by Sebastian Mies
2//
3// [The FreeBSD Licence]
4// Copyright (c) 2008
5// Sebastian Mies, Institute of Telematics, UniversitÀt Karlsruhe (TH)
6// All rights reserved.
7//
8// Redistribution and use in source and binary forms, with or without
9// modification, are permitted provided that the following conditions are
10// met:
11//
12// * Redistributions of source code must retain the above copyright notice,
13//   this list of conditions and the following disclaimer.
14// * Redistributions in binary form must reproduce the above copyright
15//   notice, this list of conditions and the following disclaimer in the
16//   documentation and/or other materials provided with the distribution.
17// * Neither the name of the author nor the names of its contributors may be
18//   used to endorse or promote products derived from this software without
19//   specific prior written permission.
20//
21// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
22// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
25// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32//
33#ifndef HELPER_HPP_
34#define HELPER_HPP_
35
36#include <boost/cstdint.hpp>
37#include <boost/type_traits.hpp>
38#include <boost/utility/enable_if.hpp>
39#include <boost/mpl/if.hpp>
40
41/* force inline macro */
42#ifndef finline
43        #define finline inline __attribute__((always_inline))
44#endif
45
46/* check whether X is a base class of Y */
47#define if_is_base_of(X,Y) \
48        typename boost::enable_if<boost::is_base_of<X, Y> , int>::type __v = 0
49
50/* check whether X is a integer */
51#define if_integral(X) \
52        typename boost::enable_if<boost::is_integral<X>,int>::type __i##X = 0
53
54/* check whether X is a unsigned integer */
55#define if_uint(X) \
56        typename boost::enable_if<boost::is_integral<X>,int>::type __i##X = 0,\
57        typename boost::enable_if<boost::is_unsigned<X>,int>::type __u##X = 0
58
59/* check whether X is a signed integer */
60#define if_int(X) \
61        typename boost::enable_if<boost::is_integral<X>,int>::type __i##X = 0,\
62        typename boost::enable_if<boost::is_signed<X>,int>::type __s##X = 0
63
64/* signature conversion */
65#define CONVERT_SIGN(X,Y) \
66        finline X& _unsigned( Y& v ) { return *((X*)&v); } \
67        finline X& _unsigned( X& v ) { return v; } \
68        finline Y& _signed( X& v ) { return *((Y*)&v); } \
69        finline Y& _signed( Y& v ) { return v; }
70
71CONVERT_SIGN( uint8_t, int8_t );
72CONVERT_SIGN( uint16_t, int16_t );
73CONVERT_SIGN( uint32_t, int32_t );
74
75/* bijective integer conversion */
76#define CONVERT_TO_TYPE( __method, __type ) \
77        template<class T> __type& __method(T& x, typename \
78        boost::enable_if< boost::mpl::bool_<sizeof(T) == sizeof(__type)>, int> \
79        ::type __ix = 0) { return (__type&) *(&x);}
80
81CONVERT_TO_TYPE( _uint, uint8_t  )
82CONVERT_TO_TYPE( _uint, uint16_t )
83CONVERT_TO_TYPE( _uint, uint32_t )
84
85CONVERT_TO_TYPE( _int , int8_t   )
86CONVERT_TO_TYPE( _int , int16_t  )
87CONVERT_TO_TYPE( _int , int32_t  )
88
89#endif /* HELPER_HPP_ */
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