CastInvalidValue.h

Go to the documentation of this file.

//============================================================================
//  The contents of this file are covered by the Viskores license. See
//  LICENSE.txt for details.
//
//  By contributing to this file, all contributors agree to the Developer
//  Certificate of Origin Version 1.1 (DCO 1.1) as stated in DCO.txt.
//============================================================================
 
//============================================================================
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt 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.
//============================================================================
#ifndef viskores_cont_internal_CastInvalidValue_h
#define viskores_cont_internal_CastInvalidValue_h
 
#include <viskores/Math.h>
#include <viskores/Types.h>
#include <viskores/VecTraits.h>
 
namespace viskores
{
namespace cont
{
namespace internal
{
 
template <typename T>
T CastInvalidValue(viskores::Float64 invalidValue)
{
  using ComponentType = typename viskores::VecTraits<T>::BaseComponentType;
 
  if (std::is_same<viskores::TypeTraitsIntegerTag,
                   typename viskores::TypeTraits<T>::NumericTag>::value)
  {
    // Casting to integer types
    if (viskores::IsFinite(invalidValue))
    {
      return T(static_cast<ComponentType>(invalidValue));
    }
    else if (viskores::IsInf(invalidValue) && (invalidValue > 0))
    {
      return T(std::numeric_limits<ComponentType>::max());
    }
    else
    {
      return T(std::numeric_limits<ComponentType>::min());
    }
  }
  else
  {
    // Not an integer type. Assume can be directly cast
    return T(static_cast<ComponentType>(invalidValue));
  }
}
}
}
} // namespace viskores::cont::internal
 
#endif //viskores_cont_internal_CastInvalidValue_h