text: /*
   * Copyright 2022 Sean McBane
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  #include "read_mesh.hpp"
  
  #include <cstdio>
  
  #include "mesh_tools.hpp"
  
  namespace Elasticity
  {
  
  MeshVariant read_mesh(const char *name, int order)
  {
      assert(order == 1 || order == 2 || order == 3 || order == 4);
      std::optional<MeshVariant> maybe_variant;
      if (order == 1)
      {
          maybe_variant =
              msh::parse_gmsh_to_tetmesh<max_element_adjacencies, max_node_adjacencies, 0, 0>(name);
      }
      else if (order == 2)
      {
          maybe_variant =
              msh::parse_gmsh_to_tetmesh<max_element_adjacencies, max_node_adjacencies, 1, 0>(name);
      }
  #if ELASTICITY_MAX_ELEMENT_ORDER > 2
      else if (order == 3)
      {
          maybe_variant =
              msh::parse_gmsh_to_tetmesh<max_element_adjacencies, max_node_adjacencies, 2, 1>(name);
      }
  #if ELASTICITY_MAX_ELEMENT_ORDER > 3
      else
      {
          maybe_variant =
              msh::parse_gmsh_to_tetmesh<max_element_adjacencies, max_node_adjacencies, 3, 3>(name);
      }
  #endif
  #endif
  
      if (!maybe_variant)
      {
          fprintf(stderr, "Got invalid mesh order %d in read_mesh!\n", order);
          exit(1);
      }
  
      std::visit(
          [](auto &mesh)
          {
              mesh.renumber_nodes();
              fill_internal_coordinates(mesh);
          },
          maybe_variant.value());
  
      return *maybe_variant;
  }
  
  } // namespace Elasticity
  