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00001 // -*- c++ -*- 00002 /*========================================================================= 00003 00004 Program: Visualization Toolkit 00005 Module: vtkMathConfigure.h.in 00006 00007 Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen 00008 All rights reserved. 00009 See Copyright.txt or http://www.kitware.com/Copyright.htm for details. 00010 00011 This software is distributed WITHOUT ANY WARRANTY; without even 00012 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 00013 PURPOSE. See the above copyright notice for more information. 00014 00015 =========================================================================*/ 00016 /*---------------------------------------------------------------------------- 00017 Copyright (c) Sandia Corporation 00018 See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details. 00019 ----------------------------------------------------------------------------*/ 00020 00021 #ifndef vtkMathConfigure_h 00022 #define vtkMathConfigure_h 00023 00024 #include <cmath> 00025 #include <float.h> // for _isnan, _finite on Win32 00026 00027 #define VTK_HAS_ISNAN 00028 #define VTK_HAS_STD_ISNAN 00029 /* #undef VTK_HAS__ISNAN */ 00030 #define VTK_HAS_ISINF 00031 #define VTK_HAS_STD_ISINF 00032 #define VTK_HAS_ISFINITE 00033 #define VTK_HAS_STD_ISFINITE 00034 #define VTK_HAS_FINITE 00035 /* #undef VTK_HAS__FINITE */ 00036 00037 // Check for undetected macro versions of isnan(), isinf(), isfinite() 00038 #if !defined(VTK_HAS_ISNAN) && defined(isnan) 00039 # define VTK_HAS_ISNAN 1 00040 #endif 00041 #if !defined(VTK_HAS_ISINF) && defined(isinf) 00042 # define VTK_HAS_ISINF 1 00043 #endif 00044 #if !defined(VTK_HAS_ISFINITE) && defined(isfinite) 00045 # define VTK_HAS_ISFINITE 1 00046 #endif 00047 #if !defined(VTK_HAS_FINITE) && defined(finite) 00048 # define VTK_HAS_FINITE 1 00049 #endif 00050 00051 // Make macros from _isnan(), _finite() if they exist (there is no _isinf) 00052 #if !defined(VTK_HAS_ISNAN) && (defined(VTK_HAS__ISNAN) || defined(_isnan)) 00053 # define isnan(x) _isnan(x) 00054 # define VTK_HAS_ISNAN 1 00055 #endif 00056 #if !defined(VTK_HAS_FINITE) && (defined(VTK_HAS__FINITE) || defined(_finite)) 00057 # define finite(x) _finite(x) 00058 # define VTK_HAS_FINITE 1 00059 #endif 00060 00061 // The CUDA compiler(nvcc) is a secondary compiler that is used beside 00062 // your host compiler. While your host compiler can support std::isnan and 00063 // other functions, the CUDA compiler doesn't. Because the CUDA compiler is 00064 // given both host and device code to parse it will then fail when it sees 00065 // std::isnan because it is in the vtkMath header and not the 00066 // implementation file. To get around this issue we check __CUDACC__ which 00067 // is only set when we are compiling with the CUDA compiler 00068 #ifdef __CUDACC__ 00069 00070 #if defined(VTK_HAS_STD_ISINF) 00071 #undef VTK_HAS_STD_ISINF 00072 #endif 00073 00074 #if defined(VTK_HAS_STD_ISNAN) 00075 #undef VTK_HAS_STD_ISNAN 00076 #endif 00077 00078 #if defined(VTK_HAS_STD_ISFINITE) 00079 #undef VTK_HAS_STD_ISFINITE 00080 #endif 00081 00082 #endif 00083 00084 // We pretty much assume that all compilers are going to provide 00085 // std::numeric_limits methods in the limits header. On of the Borland 00086 // dashboard compilers failed to link in the methods, so we have a special 00087 // case here. If we find more platforms that do not support it correctly, 00088 // then we should probably implement a TRY_COMPILE in the CMakeLists.txt. 00089 #ifndef __BORLANDC__ 00090 # define VTK_HAS_STD_NUMERIC_LIMITS 00091 #endif 00092 00093 // If the isnan or isinf function does not exist, then our next attempt is to 00094 // use comparisons to determine if the number is not finite. Although these 00095 // comparisons should be valid, some systems raise execeptions anyway (possibly 00096 // because exceptions for really bad operations like division by 0 are on). 00097 // This flag will instruct vtkMath not to make these comparisons. (The next 00098 // fallback is to do IEEE-754 bit comparisons.) 00099 #ifdef __BORLANDC__ 00100 # define VTK_NON_FINITE_CAUSES_EXCEPTIONS 00101 #endif 00102 00103 #endif //vtkMathConfigure_h
1.8.0