// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-FileCopyrightText: Copyright (c) Sandia Corporation
// SPDX-License-Identifier: BSD-3-Clause

#ifndef vtkMathConfigure_h
#define vtkMathConfigure_h

#include <cmath>
#include <float.h> // for _isnan, _finite on Win32

#cmakedefine VTK_HAS_ISNAN
#cmakedefine VTK_HAS_STD_ISNAN
#cmakedefine VTK_HAS__ISNAN
#cmakedefine VTK_HAS_ISINF
#cmakedefine VTK_HAS_STD_ISINF
#cmakedefine VTK_HAS_ISFINITE
#cmakedefine VTK_HAS_STD_ISFINITE
#cmakedefine VTK_HAS_FINITE
#cmakedefine VTK_HAS__FINITE

// Check for undetected macro versions of isnan(), isinf(), isfinite()
#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
#if !defined(VTK_HAS_ISFINITE) && defined(isfinite)
# define VTK_HAS_ISFINITE 1
#endif
#if !defined(VTK_HAS_FINITE) && defined(finite)
# define VTK_HAS_FINITE 1
#endif

// Make macros from _isnan(), _finite() if they exist (there is no _isinf)
#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_FINITE) && (defined(VTK_HAS__FINITE) || defined(_finite))
# define finite(x) _finite(x)
# define VTK_HAS_FINITE 1
#endif

// The CUDA compiler(nvcc) is a secondary compiler that is used beside
// your host compiler. While your host compiler can support std::isnan and
// other functions, the CUDA compiler doesn't. Because the CUDA compiler is
// given both host and device code to parse it will then fail when it sees
// std::isnan because it is in the vtkMath header and not the
// implementation file. To get around this issue we check __CUDACC__ which
// is only set when we are compiling with the CUDA compiler
#if defined(__CUDACC__) && defined(__NVCC__)

#if defined(VTK_HAS_STD_ISINF)
#undef VTK_HAS_STD_ISINF
#endif

#if defined(VTK_HAS_STD_ISNAN)
#undef VTK_HAS_STD_ISNAN
#endif

#if defined(VTK_HAS_STD_ISFINITE)
#undef VTK_HAS_STD_ISFINITE
#endif

#endif

#endif //vtkMathConfigure_h
