lib/libUPnP/Neptune/Source/Core/NptDynamicCast.h

   1 /*****************************************************************
   2 |
   3 |   Neptune - Dynamic Cast Support
   4 |
   5 | Copyright (c) 2002-2008, Axiomatic Systems, LLC.
   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 met:
  10 |     * Redistributions of source code must retain the above copyright
  11 |       notice, this list of conditions and the following disclaimer.
  12 |     * Redistributions in binary form must reproduce the above copyright
  13 |       notice, this list of conditions and the following disclaimer in the
  14 |       documentation and/or other materials provided with the distribution.
  15 |     * Neither the name of Axiomatic Systems nor the
  16 |       names of its contributors may be used to endorse or promote products
  17 |       derived from this software without specific prior written permission.
  18 |
  19 | THIS SOFTWARE IS PROVIDED BY AXIOMATIC SYSTEMS ''AS IS'' AND ANY
  20 | EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  21 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22 | DISCLAIMED. IN NO EVENT SHALL AXIOMATIC SYSTEMS BE LIABLE FOR ANY
  23 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  26 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29 |
  30  ****************************************************************/
  31
  32 #ifndef _NPT_DYNAMIC_CAST_H_
  33 #define _NPT_DYNAMIC_CAST_H_
  34
  35 /*----------------------------------------------------------------------
  36 |   includes
  37 +---------------------------------------------------------------------*/
  38 #include "NptTypes.h"
  39 #include "NptCommon.h"
  40 #include "NptResults.h"
  41 #include "NptConfig.h"
  42
  43 /*----------------------------------------------------------------------
  44 |   macros
  45 +---------------------------------------------------------------------*/
  46 #if defined(NPT_CONFIG_NO_RTTI)
  47 #define NPT_DYNAMIC_CAST(_class,_object) \
  48 ( ((_object)==0) ? 0 : reinterpret_cast<_class*>((_object)->DynamicCast(&_class::_class_##_class)) )
  49 #define NPT_IMPLEMENT_DYNAMIC_CAST(_class)              \
  50 static int _class_##_class;                             \
  51 virtual void* DynamicCast(const void* class_anchor) {   \
  52     if (class_anchor ==  &_class::_class_##_class) {    \
  53         return static_cast<_class*>(this);              \
  54     }                                                   \
  55     return NULL;                                        \
  56 }
  57 #define NPT_IMPLEMENT_DYNAMIC_CAST_D(_class,_superclass)\
  58 static int _class_##_class;                             \
  59 virtual void* DynamicCast(const void* class_anchor) {   \
  60     if (class_anchor ==  &_class::_class_##_class) {    \
  61         return static_cast<_class*>(this);              \
  62     } else {                                            \
  63         return _superclass::DynamicCast(class_anchor);  \
  64     }                                                   \
  65 }
  66 #define NPT_IMPLEMENT_DYNAMIC_CAST_D2(_class,_superclass,_mixin)\
  67 static int _class_##_class;                                     \
  68 virtual void* DynamicCast(const void* class_anchor) {           \
  69     if (class_anchor ==  &_class::_class_##_class) {            \
  70         return static_cast<_class*>(this);                      \
  71     } else {                                                    \
  72         void* sup = _superclass::DynamicCast(class_anchor);     \
  73         if (sup) return sup;                                    \
  74         return _mixin::DynamicCast(class_anchor);               \
  75     }                                                           \
  76 }
  77 #define NPT_DEFINE_DYNAMIC_CAST_ANCHOR(_class) int _class::_class_##_class = 0;
  78
  79 #else
  80
  81 #define NPT_DYNAMIC_CAST(_class,_object) dynamic_cast<_class*>(_object)
  82 #define NPT_IMPLEMENT_DYNAMIC_CAST(_class)
  83 #define NPT_IMPLEMENT_DYNAMIC_CAST_D(_class,_superclass)
  84 #define NPT_IMPLEMENT_DYNAMIC_CAST_D2(_class,_superclass,_mixin)
  85 #define NPT_DEFINE_DYNAMIC_CAST_ANCHOR(_class)
  86
  87 #endif
  88
  89 #endif // _NPT_DYNAMIC_CAST_H_