VTK: dox/Common/vtkTemplateAliasMacro.h Source File

00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    vtkTemplateAliasMacro.h
00005 
00006   Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
00007   All rights reserved.
00008   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00009 
00010      This software is distributed WITHOUT ANY WARRANTY; without even
00011      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
00012      PURPOSE.  See the above copyright notice for more information.
00013 
00014 =========================================================================*/
00038 #ifndef __vtkTemplateAliasMacro_h
00039 #define __vtkTemplateAliasMacro_h
00040 
00041 #include "vtkTypeTraits.h"
00042 
00043 // Allow individual switching of support for each scalar size/signedness.
00044 // These could be made advanced user options to be configured by CMake.
00045 #define VTK_USE_INT8 1
00046 #define VTK_USE_UINT8 1
00047 #define VTK_USE_INT16 1
00048 #define VTK_USE_UINT16 1
00049 #define VTK_USE_INT32 1
00050 #define VTK_USE_UINT32 1
00051 #define VTK_USE_INT64 1
00052 #define VTK_USE_UINT64 1
00053 #define VTK_USE_FLOAT32 1
00054 #define VTK_USE_FLOAT64 1
00055 
00056 // Force UINT64 off if we cannot implement support for it.
00057 #if defined(VTK_TYPE_USE___INT64) && !defined(VTK_TYPE_CONVERT_UI64_TO_DOUBLE)
00058 # undef VTK_USE_UINT64
00059 # define VTK_USE_UINT64 0
00060 #endif
00061 
00062 //--------------------------------------------------------------------------
00063 
00064 // Define helper macros to switch types on and off.
00065 #define vtkTemplateAliasMacroCase(typeN, call)                                \
00066   vtkTemplateAliasMacroCase0(typeN, call, VTK_TYPE_SIZED_##typeN)
00067 #define vtkTemplateAliasMacroCase0(typeN, call, sized)                        \
00068   vtkTemplateAliasMacroCase1(typeN, call, sized)
00069 #define vtkTemplateAliasMacroCase1(typeN, call, sized)                        \
00070   vtkTemplateAliasMacroCase2(typeN, call, VTK_USE_##sized)
00071 #define vtkTemplateAliasMacroCase2(typeN, call, value)                        \
00072   vtkTemplateAliasMacroCase3(typeN, call, value)
00073 #define vtkTemplateAliasMacroCase3(typeN, call, value)                        \
00074   vtkTemplateAliasMacroCase_##value(typeN, call)
00075 #define vtkTemplateAliasMacroCase_0(typeN, call)                              \
00076   case VTK_##typeN:                                                           \
00077     {                                                                         \
00078     vtkGenericWarningMacro("Support for VTK_" #typeN " not compiled.");       \
00079     }; break
00080 #define vtkTemplateAliasMacroCase_1(typeN, call)                              \
00081   case VTK_##typeN:                                                           \
00082     {                                                                         \
00083     typedef vtkTypeTraits<VTK_TYPE_NAME_##typeN>::SizedType VTK_TT; call;     \
00084     }; break
00085 
00086 // Add "long long" to the template macro if it is enabled.
00087 #if defined(VTK_TYPE_USE_LONG_LONG)
00088 # define vtkTemplateAliasMacroCase_ll(typeN, call)                            \
00089              vtkTemplateAliasMacroCase(typeN, call);
00090 #else
00091 # define vtkTemplateAliasMacroCase_ll(typeN, call)
00092 #endif
00093 
00094 // Add "__int64" to the template macro if it is enabled.
00095 #if defined(VTK_TYPE_USE___INT64)
00096 # define vtkTemplateAliasMacroCase_i64(typeN, call)                           \
00097              vtkTemplateAliasMacroCase(typeN, call);
00098 #else
00099 # define vtkTemplateAliasMacroCase_i64(typeN, call)
00100 #endif
00101 
00102 // Define a macro to dispatch calls to a template instantiated over
00103 // the aliased scalar types.
00104 #define vtkTemplateAliasMacro(call)                                           \
00105   vtkTemplateAliasMacroCase(DOUBLE, call);                                    \
00106   vtkTemplateAliasMacroCase(FLOAT, call);                                     \
00107   vtkTemplateAliasMacroCase_ll(LONG_LONG, call)                               \
00108   vtkTemplateAliasMacroCase_ll(UNSIGNED_LONG_LONG, call)                      \
00109   vtkTemplateAliasMacroCase_i64(__INT64, call)                                \
00110   vtkTemplateAliasMacroCase_i64(UNSIGNED___INT64, call)                       \
00111   vtkTemplateAliasMacroCase(ID_TYPE, call);                                   \
00112   vtkTemplateAliasMacroCase(LONG, call);                                      \
00113   vtkTemplateAliasMacroCase(UNSIGNED_LONG, call);                             \
00114   vtkTemplateAliasMacroCase(INT, call);                                       \
00115   vtkTemplateAliasMacroCase(UNSIGNED_INT, call);                              \
00116   vtkTemplateAliasMacroCase(SHORT, call);                                     \
00117   vtkTemplateAliasMacroCase(UNSIGNED_SHORT, call);                            \
00118   vtkTemplateAliasMacroCase(CHAR, call);                                      \
00119   vtkTemplateAliasMacroCase(SIGNED_CHAR, call);                               \
00120   vtkTemplateAliasMacroCase(UNSIGNED_CHAR, call)
00121 
00122 #endif