fe_disable_exception.h

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#ifndef FE_DISABLE_EXCEPTION_H
#define FE_DISABLE_EXCEPTION_H
#include <fenv.h>

namespace FullPhysics {
/****************************************************************/
class FeDisableException {
public:
  FeDisableException()
  {
    // Mac doesn't have this function, even though it is a C99
    // function. We check for this during configuration.
#ifdef HAVE_FEENABLEEXCEPT
    fegetexceptflag(&initial_flag, FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW);
    initial_trap = fedisableexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW);
#endif    
  }
  ~FeDisableException() 
  {
#ifdef HAVE_FEENABLEEXCEPT
    feclearexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW);
    fesetexceptflag(&initial_flag, FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW);
    feenableexcept(initial_trap);
#endif
  }
private:
  fexcept_t initial_flag;
  int initial_trap;
};

}
#endif