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// -*- c++ -*-
/*=========================================================================
Program: Visualization Toolkit
Module: vtkMathConfigure.h.in
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/*----------------------------------------------------------------------------
Copyright (c) Sandia Corporation
See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
----------------------------------------------------------------------------*/
#ifndef __vtkMathConfigure_h
#define __vtkMathConfigure_h
#include <math.h>
#include <float.h>
#cmakedefine VTK_HAS_ISNAN
#cmakedefine VTK_HAS__ISNAN
#cmakedefine VTK_HAS_ISINF
#cmakedefine VTK_HAS__ISINF
// VTK_HAS_ISNAN is only defined if an actual function exists. Also set it if
// isnan is a macro.
#if !defined(VTK_HAS_ISNAN) && defined(isnan)
# define VTK_HAS_ISNAN 1
#endif
#if !defined(VTK_HAS_ISINF) && defined(isinf)
# define VTK_HAS_ISINF 1
#endif
// Try to fake having isnan and isinf if _isnan or _isinf is available
#if !defined(VTK_HAS_ISNAN) && (defined(VTK_HAS__ISNAN) || defined(_isnan))
# define isnan(x) _isnan(x)
# define VTK_HAS_ISNAN 1
#endif
#if !defined(VTK_HAS_ISINF) && (defined(VTK_HAS__ISINF) || defined(_isinf))
# define isinf(x) _isinf(x)
# define VTK_HAS_ISINF 1
#endif
// The compiler for the G5 Apple is not including the isnan and isinf prototypes
// in its math headers even though the symbol exists in the libraries. Just do
// a brute force to not use those functions in this case to get around compiler
// errors.
#if defined(__APPLE__) && (__GNUC__ < 4)
# undef VTK_HAS_ISNAN
# undef VTK_HAS_ISINF
#endif
// We pretty much assume that all compilers are going to provide
// std::numeric_limits methods in the limits header. On of the Borland
// dashboard compilers failed to link in the methods, so we have a special
// case here. If we find more platforms that do not support it correctly,
// then we should probably implement a TRY_COMPILE in the CMakeLists.txt.
#ifndef __BORLANDC__
# define VTK_HAS_STD_NUMERIC_LIMITS
#endif
// If the isnan or isinf function does not exist, then our next attempt is to
// use comparisons to determine if the number is not finite. Although these
// comparisons should be valid, some systems raise execeptions anyway (possibly
// because exceptions for really bad operations like division by 0 are on).
// This flag will instruct vtkMath not to make these comparisons. (The next
// fallback is to do IEEE-754 bit comparisons.)
#ifdef __BORLANDC__
# define VTK_NON_FINITE_CAUSES_EXCEPTIONS
#endif
#endif //__vtkMathConfigure_h
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