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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkFloatingPointExceptions.h"
#include "vtkFloatingPointExceptionsConfigure.h"
#if defined(VTK_USE_FENV)
#include <csignal>
#include <cstdio>
#include <fenv.h>
#endif
// for _controlfp
#ifdef _MSC_VER
#include <float.h>
#endif
#if defined(VTK_USE_FENV)
#define signal_handler VTK_ABI_NAMESPACE_MANGLE(signal_handler)
extern "C" void signal_handler(int signal)
{
// NOLINTNEXTLINE(bugprone-signal-handler)
fprintf(stderr, "Error: Floating point exception detected. Signal %d\n", signal);
// Call `abort()` so that a backtrace is created. We already broke signal
// handler rules by calling `fprintf`, so any kind of "recovery" is
// ill-advised.
abort();
}
#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) && FE_ALL_EXCEPT != 0
// 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) && FE_ALL_EXCEPT != 0
fedisableexcept(FE_DIVBYZERO | FE_INVALID);
#endif
}
VTK_ABI_NAMESPACE_END
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