vector_tools_common.h

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// ------------------------------------------------------------------------
//
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2020 - 2023 by the deal.II authors
//
// This file is part of the deal.II library.
//
// Part of the source code is dual licensed under Apache-2.0 WITH
// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
// governing the source code and code contributions can be found in
// LICENSE.md and CONTRIBUTING.md at the top level directory of deal.II.
//
// ------------------------------------------------------------------------
 
#ifndef dealii_vector_tools_common_h
#define dealii_vector_tools_common_h
 
 
#include <deal.II/base/config.h>
 
#include <deal.II/base/patterns.h>
 
DEAL_II_NAMESPACE_OPEN
 
namespace VectorTools
{
  enum NormType
  {
    mean,
 
    L1_norm,
 
    L2_norm,
 
    Lp_norm,
 
    Linfty_norm,
 
    H1_seminorm,
 
    Hdiv_seminorm,
 
    H1_norm,
 
    W1p_seminorm,
 
    W1p_norm,
 
    W1infty_seminorm,
 
    W1infty_norm
  };
 
  DeclExceptionMsg(ExcPointNotAvailableHere,
                   "The given point is inside a cell of a "
                   "parallel::distributed::Triangulation that is not "
                   "locally owned by this processor.");
} // namespace VectorTools
 
// Make sure we can use NormType with Patterns.
namespace Patterns
{
  namespace Tools
  {
    template <>
    struct Convert<VectorTools::NormType, void>
    {
      static std::unique_ptr<Patterns::PatternBase>
      to_pattern()
      {
        return std::make_unique<Patterns::Selection>(
          "mean|L1_norm|L2_norm|Lp_norm|"
          "Linfty_norm|H1_seminorm|Hdiv_seminorm|"
          "H1_norm|W1p_seminorm|W1p_norm|"
          "W1infty_seminorm|W1infty_norm");
      }
 
 
 
      static std::string
      to_string(const VectorTools::NormType &s,
                const Patterns::PatternBase &p =
                  *Convert<VectorTools::NormType>::to_pattern())
      {
        std::string str;
        if (s == VectorTools::mean)
          str = "mean";
        else if (s == VectorTools::L1_norm)
          str = "L1_norm";
        else if (s == VectorTools::L2_norm)
          str = "L2_norm";
        else if (s == VectorTools::Lp_norm)
          str = "Lp_norm";
        else if (s == VectorTools::Linfty_norm)
          str = "Linfty_norm";
        else if (s == VectorTools::H1_seminorm)
          str = "H1_seminorm";
        else if (s == VectorTools::Hdiv_seminorm)
          str = "Hdiv_seminorm";
        else if (s == VectorTools::H1_norm)
          str = "H1_norm";
        else if (s == VectorTools::W1p_seminorm)
          str = "W1p_seminorm";
        else if (s == VectorTools::W1infty_seminorm)
          str = "W1infty_seminorm";
        else if (s == VectorTools::W1infty_norm)
          str = "W1infty_norm";
        else if (s == VectorTools::W1p_norm)
          str = "W1p_norm";
        else
          {
            AssertThrow(false, ExcMessage("Didn't recognize a norm type."));
          }
        AssertThrow(p.match(str), ExcInternalError());
        return str;
      }
 
 
      static VectorTools::NormType
      to_value(const std::string           &str,
               const Patterns::PatternBase &p =
                 *Convert<VectorTools::NormType>::to_pattern())
      {
        VectorTools::NormType norm = VectorTools::mean;
        AssertThrow(p.match(str),
                    ExcMessage(
                      "String " + str +
                      " cannot be converted to VectorTools::NormType"));
 
        if (str == "mean")
          norm = VectorTools::mean;
        else if (str == "L1_norm")
          norm = VectorTools::L1_norm;
        else if (str == "L2_norm")
          norm = VectorTools::L2_norm;
        else if (str == "Lp_norm")
          norm = VectorTools::Lp_norm;
        else if (str == "Linfty_norm")
          norm = VectorTools::Linfty_norm;
        else if (str == "H1_seminorm")
          norm = VectorTools::H1_seminorm;
        else if (str == "Hdiv_seminorm")
          norm = VectorTools::Hdiv_seminorm;
        else if (str == "H1_norm")
          norm = VectorTools::H1_norm;
        else if (str == "W1p_seminorm")
          norm = VectorTools::W1p_seminorm;
        else if (str == "W1infty_seminorm")
          norm = VectorTools::W1infty_seminorm;
        else if (str == "W1infty_norm")
          norm = VectorTools::W1infty_norm;
        else if (str == "W1p_norm")
          norm = VectorTools::W1p_norm;
        else
          {
            AssertThrow(false, ExcMessage("Didn't recognize a norm type."));
          }
        return norm;
      }
    };
  } // namespace Tools
} // namespace Patterns
 
DEAL_II_NAMESPACE_CLOSE
 
#endif // dealii_vector_tools_common_h