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/*=========================================================================
Program: Visualization Toolkit
Module: vtkFloatingPointExceptions.cxx
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.
=========================================================================*/
#include "vtkFloatingPointExceptions.h"
#include "vtkFloatingPointExceptionsConfigure.h"
#if defined(VTK_USE_FENV)
#include <csignal>
#include <fenv.h>
#endif
// for _controlfp
#ifdef _MSC_VER
#include <float.h>
#endif
#if defined(VTK_USE_FENV)
//------------------------------------------------------------------------------
// Signal handler for floating point exceptions in anonymous namespace
namespace
{
void signal_handler(int signal)
{
cerr << "Error: Floating point exception detected. Signal " << signal << endl;
// This should possibly throw an exception rather than abort, abort should
// at least give access to the stack when it fails here.
abort();
}
} // End anonymous namespace
#endif
//------------------------------------------------------------------------------
// Description:
// Enable floating point exceptions.
VTK_ABI_NAMESPACE_BEGIN
void vtkFloatingPointExceptions::Enable()
{
#ifdef _MSC_VER
// enable floating point exceptions on MSVC
_controlfp(_EM_DENORMAL | _EM_UNDERFLOW | _EM_INEXACT, _MCW_EM);
#endif //_MSC_VER
#if defined(VTK_USE_FENV)
// This should work on all platforms
feenableexcept(FE_DIVBYZERO | FE_INVALID);
// Set the signal handler
signal(SIGFPE, signal_handler);
#endif
}
//------------------------------------------------------------------------------
// Description:
// Disable floating point exceptions.
void vtkFloatingPointExceptions::Disable()
{
#ifdef _MSC_VER
// disable floating point exceptions on MSVC
_controlfp(
_EM_INVALID | _EM_DENORMAL | _EM_ZERODIVIDE | _EM_OVERFLOW | _EM_UNDERFLOW | _EM_INEXACT,
_MCW_EM);
#endif //_MSC_VER
#if defined(VTK_USE_FENV)
fedisableexcept(FE_DIVBYZERO | FE_INVALID);
#endif
}
VTK_ABI_NAMESPACE_END
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