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104 lines
3.6 KiB
C
104 lines
3.6 KiB
C
3 weeks ago
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// -*- c++ -*-
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkMathConfigure.h.in
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/*----------------------------------------------------------------------------
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Copyright (c) Sandia Corporation
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See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
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----------------------------------------------------------------------------*/
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#ifndef vtkMathConfigure_h
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#define vtkMathConfigure_h
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#include <cmath>
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#include <float.h> // for _isnan, _finite on Win32
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/* #undef VTK_HAS_ISNAN */
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/* #undef VTK_HAS_STD_ISNAN */
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#define VTK_HAS__ISNAN
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/* #undef VTK_HAS_ISINF */
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/* #undef VTK_HAS_STD_ISINF */
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/* #undef VTK_HAS_ISFINITE */
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/* #undef VTK_HAS_STD_ISFINITE */
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/* #undef VTK_HAS_FINITE */
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#define VTK_HAS__FINITE
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// Check for undetected macro versions of isnan(), isinf(), isfinite()
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#if !defined(VTK_HAS_ISNAN) && defined(isnan)
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# define VTK_HAS_ISNAN 1
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#endif
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#if !defined(VTK_HAS_ISINF) && defined(isinf)
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# define VTK_HAS_ISINF 1
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#endif
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#if !defined(VTK_HAS_ISFINITE) && defined(isfinite)
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# define VTK_HAS_ISFINITE 1
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#endif
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#if !defined(VTK_HAS_FINITE) && defined(finite)
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# define VTK_HAS_FINITE 1
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#endif
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// Make macros from _isnan(), _finite() if they exist (there is no _isinf)
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#if !defined(VTK_HAS_ISNAN) && (defined(VTK_HAS__ISNAN) || defined(_isnan))
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# define isnan(x) _isnan(x)
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# define VTK_HAS_ISNAN 1
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#endif
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#if !defined(VTK_HAS_FINITE) && (defined(VTK_HAS__FINITE) || defined(_finite))
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# define finite(x) _finite(x)
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# define VTK_HAS_FINITE 1
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#endif
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// The CUDA compiler(nvcc) is a secondary compiler that is used beside
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// your host compiler. While your host compiler can support std::isnan and
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// other functions, the CUDA compiler doesn't. Because the CUDA compiler is
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// given both host and device code to parse it will then fail when it sees
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// std::isnan because it is in the vtkMath header and not the
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// implementation file. To get around this issue we check __CUDACC__ which
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// is only set when we are compiling with the CUDA compiler
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#ifdef __CUDACC__
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#if defined(VTK_HAS_STD_ISINF)
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#undef VTK_HAS_STD_ISINF
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#endif
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#if defined(VTK_HAS_STD_ISNAN)
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#undef VTK_HAS_STD_ISNAN
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#endif
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#if defined(VTK_HAS_STD_ISFINITE)
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#undef VTK_HAS_STD_ISFINITE
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#endif
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#endif
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// We pretty much assume that all compilers are going to provide
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// std::numeric_limits methods in the limits header. On of the Borland
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// dashboard compilers failed to link in the methods, so we have a special
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// case here. If we find more platforms that do not support it correctly,
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// then we should probably implement a TRY_COMPILE in the CMakeLists.txt.
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#ifndef __BORLANDC__
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# define VTK_HAS_STD_NUMERIC_LIMITS
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#endif
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// If the isnan or isinf function does not exist, then our next attempt is to
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// use comparisons to determine if the number is not finite. Although these
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// comparisons should be valid, some systems raise execeptions anyway (possibly
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// because exceptions for really bad operations like division by 0 are on).
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// This flag will instruct vtkMath not to make these comparisons. (The next
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// fallback is to do IEEE-754 bit comparisons.)
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#ifdef __BORLANDC__
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# define VTK_NON_FINITE_CAUSES_EXCEPTIONS
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#endif
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#endif //vtkMathConfigure_h
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