Ecrire_MED.cpp

/****************************************************************************
* Copyright (c) 2026, CEA
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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#include <Ecrire_MED.h>
#include <Domaine.h>
#include <med++.h>
#include <Domaine_VF.h>
#include <TRUSTTabs.h>
#include <Char_ptr.h>
#include <medcoupling++.h>
#include <ctime>
#include <TRUST_2_MED.h>
#include <Sortie_Fichier_base.h>
#include <Synonyme_info.h>
#include <Domaine_dis_cache.h>
#include <Domaine_VF.h>
 
#ifdef MEDCOUPLING_
#include <MEDLoader.hxx>
#include <MEDFileMesh.hxx>
#include <MEDCouplingFieldDouble.hxx>
#pragma GCC diagnostic ignored "-Wreorder"
#include <MEDFileField.hxx>
using namespace MEDCoupling;
#endif
 
Implemente_instanciable_32_64(Ecrire_MED_32_64,"Write_MED",Interprete);
Add_synonym(Ecrire_MED,"Ecrire_MED");
 
// Anonymous namespace for local functions:
namespace
{
 
/*! @brief Loop on bords,raccords,joints
 */
template <typename _SIZE_>
const Frontiere_32_64<_SIZE_>& mes_faces_fr(const Domaine_32_64<_SIZE_>& domaine, int i)
{
  int nb_std = domaine.nb_front_Cl() + domaine.nb_groupes_faces();
  return i<nb_std ? domaine.frontiere(i) : domaine.joint(i-nb_std);
}
 
} // namespace
template <typename _SIZE_>
Sortie& Ecrire_MED_32_64<_SIZE_>::printOn(Sortie& os) const
{
  return Interprete::printOn(os);
}
 
template <typename _SIZE_>
Entree& Ecrire_MED_32_64<_SIZE_>::readOn(Entree& is)
{
  return Interprete::readOn(is);
}
 
template <typename _SIZE_>
Ecrire_MED_32_64<_SIZE_>::Ecrire_MED_32_64(const Nom& file_name, const Domaine_t& dom):
  dom_(dom)
#ifdef MEDCOUPLING_
  ,  mcumesh_(nullptr)
#endif
{
  nom_fichier_ = Sortie_Fichier_base::root;
  if (nom_fichier_!="") nom_fichier_+="/";
  nom_fichier_ += file_name;
}
 
template <typename _SIZE_>
void Ecrire_MED_32_64<_SIZE_>::set_file_name_and_dom(const Nom& file_name, const Domaine_t& dom, const Domaine_dis_base* dom_dis)
{
  nom_fichier_ = Sortie_Fichier_base::root;
  if (nom_fichier_!="") nom_fichier_+="/";
  nom_fichier_ += file_name;
  dom_ = dom;
  if(dom_dis)
    domaine_dis_ = ref_cast(Domaine_VF, *dom_dis);
}
 
// XD Ecrire_MED interprete Write_MED INHERITS_BRACE Write a domain to MED format into a file.
// XD attr nom_dom ref_domaine nom_dom REQ Name of domain.
// XD attr file chaine file REQ Name of file.
template <typename _SIZE_>
Entree& Ecrire_MED_32_64<_SIZE_>::interpreter(Entree& is)
{
  Cerr<<"syntax : Write_MED [ append ] nom_dom nom_fic "<<finl;
  bool append=false;
  Nom nom_dom;
  is >> nom_dom ;
  Motcle app("append");
  if (app==nom_dom)
    {
      append=true;
      is >> nom_dom;
      Cerr<<" Adding "<<nom_dom<<finl;
    }
  is >> nom_fichier_;
  if(! sub_type(Domaine_t, objet(nom_dom)))
    {
      Cerr << nom_dom << " type is " << objet(nom_dom).que_suis_je() << finl;
      Cerr << "Only Domaine type objects can be meshed" << finl;
      exit();
    }
  dom_ = ref_cast(Domaine_t, objet(nom_dom));
  ecrire_domaine(append);
  return is;
}
 
#ifndef MED_
template <typename _SIZE_>
void Ecrire_MED_32_64<_SIZE_>::ecrire_champ(const Nom& type,const Nom& nom_cha1,const DoubleTab& val,const Noms& unite, const Noms& noms_compo, const Nom& type_elem,double time)
{
  med_non_installe();
}
 
template <typename _SIZE_>
void Ecrire_MED_32_64<_SIZE_>::ecrire_domaine(bool app)
{
  med_non_installe();
}
 
template <typename _SIZE_>
void Ecrire_MED_32_64<_SIZE_>::ecrire_domaine_dual(bool app)
{
  med_non_installe();
}
 
template <typename _SIZE_>
void Ecrire_MED_32_64<_SIZE_>::ecrire_domaine_dis(bool append)
{
  med_non_installe();
}
#else
 
/*! @brief For each bord get starting and ending index (by construction in TRUST, face indices at the
 * boundary are grouped)
 */
template <typename _SIZE_>
void Ecrire_MED_32_64<_SIZE_>::get_bords_infos(Noms& noms_bords_and_jnts, ArrOfInt_t& sz_bords_and_jnts) const
{
  const Domaine_t& dom = dom_.valeur();
  int nb_bords = dom.nb_front_Cl(), nb_faces_int = dom.nb_groupes_faces();
 
  // [ABN] TODO handle joints properly - they could be written too
  int nb_jnts = dom.nb_joints();
  nb_jnts = 0;
 
  noms_bords_and_jnts.dimensionner(nb_bords+nb_jnts+nb_faces_int);
  sz_bords_and_jnts.resize_array(nb_bords+nb_jnts+nb_faces_int);
 
  // Get border names and nb of faces:
  for(int i=0; i<nb_bords + nb_faces_int; i++)
    {
      const Frontiere_32_64<_SIZE_>& front = dom.frontiere(i);
      if (sub_type(Raccord_base_32_64<_SIZE_>,front))
        {
          noms_bords_and_jnts[i] = "type_raccord_";
          noms_bords_and_jnts[i] += front.le_nom();
        }
      else if (sub_type(Groupe_Faces_32_64<_SIZE_>,front))
        {
          noms_bords_and_jnts[i] = "groupes_faces_";
          noms_bords_and_jnts[i] += front.le_nom();
        }
      else
        noms_bords_and_jnts[i] = front.le_nom();
      sz_bords_and_jnts[i] = front.nb_faces();
    }
//  for(int i=0; i<nb_jnts; i++)
//    {
//      const Joint& jnt = dom.joint(i);
//      noms_bords_and_jnts[nb_bords+i] = jnt.le_nom();
//      sz_bords_and_jnts[nb_bords+i] = jnt.nb_faces();
//    }
}
 
template <typename _SIZE_>
void Ecrire_MED_32_64<_SIZE_>::ecrire_domaine(bool append)
{
  if (Process::nproc()>Process::multiple_files)
    {
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << finl;
      Cerr << "*** WARNING *** The MED post-processing format will generate " << Process::nproc() << " files" << finl;
      Cerr << "This will slow I/O performances since it exceeds the limit of " << Process::multiple_files << finl;
      Cerr << "Use LATA format instead or contact TRUST support team." << finl;
      Cerr << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << finl;
    }
  ecrire_domaine_dis(append);
}
 
/*! @brief Write the dual of the domain in the file
 *
 * @param append = false new file, append = true append to existing file
 */
template <>
void Ecrire_MED_32_64<int>::ecrire_domaine_dual(bool append)
{
  if (Objet_U::dimension==0)
    Process::exit("Dimension is not defined. Check your data file.");
#ifndef MEDCOUPLING_
  med_non_installe(); // actually MEDCoupling ... but will do.
#else
 
  // Retrieve (or build!) the **dual** mesh associated with the domain.
  // This potentially means discretizing the domaine !
  assert(domaine_dis_);
  const Domaine_VF& dom_vf = ref_cast(Domaine_VF, domaine_dis_.valeur());
  const auto& dual_m = dom_vf.get_mc_dual_mesh();
  MEDCouplingUMesh *dual_no_const = const_cast<MEDCouplingUMesh *>(dual_m);  // because of setCoords() and setMeshAtLevel()
 
  // Prepare final MEDFileUMesh object:
  MCAuto<MEDFileUMesh> mfu(MEDFileUMesh::New());
  mfu->setName(dual_m->getName());      // name must be provided
  mfu->setCoords(dual_no_const->getCoords());  // should be the same coord array for all levels (i.e. dom->les_sommets())
  mfu->setMeshAtLevel(0, dual_no_const, false);
 
  // Check the mesh
#ifndef NDEBUG
  dual_m->checkConsistency();
#endif
 
  // Write:
  int option = (append ? 1 : 2); /* 2: reset file. 1: append, 0: overwrite objects */
  Cerr<<"Writing file '" << nom_fichier_<<"' with mesh name '" << dual_m->getName() << "' (append=" << (append ? "true": "false") << ") ..."<<finl;
  mfu->write(nom_fichier_.getString(), option);
 
#endif
}
 
template <typename _SIZE_>
void Ecrire_MED_32_64<_SIZE_>::ecrire_domaine_dual(bool append)
{
  // not coded for 64b domains ...
  throw;
}
 
/*! @brief Fill face and groups in the MEDCoupling object
 *
 * Two cases:
 * - either we want the full face mesh, in which case we guarantee that the face numbering will be identical to TRUST in the
 * final MED file
 * - or, we only write boundary faces. In this case we can still preserve face numbering for all 'classical' borders (i.e. not
 * joints) since by construction TRUST places those faces first, but faces of **joints** are renumbered.
 */
template <typename _SIZE_>
void Ecrire_MED_32_64<_SIZE_>::fill_faces_and_boundaries()
{
  using Frontiere_t = Frontiere_32_64<_SIZE_>;
 
  // Fill arrays all_faces_bords and noms_bords
  Noms noms_bords_and_jnts;
  ArrOfInt_t sz_bords_and_jnts;
  get_bords_infos(noms_bords_and_jnts, sz_bords_and_jnts);
 
  int_t nfaces = 0;
  bool full_face_mesh = domaine_dis_ && ref_cast(Domaine_VF, domaine_dis_.valeur()).elem_faces().size()>0;
  // If the domain has faces (eg:domain computation), we can create a face mesh (all faces, incl internal ones), else only a boundary mesh
  if (full_face_mesh)
    {
      assert((std::is_same<_SIZE_, int>::value));  // we have a Domaine_dis, so we discretized already, so we are 32bits ...
      // Faces mesh - by construction (see build_mc_face_mesh) it will have the same face numbering as in TRUST.
      const Domaine_VF& dom_vf = ref_cast(Domaine_VF, domaine_dis_.valeur());
      dom_vf.build_mc_face_mesh();
      const MEDCouplingUMesh *faces_mesh = dom_vf.get_mc_face_mesh();
      MCAuto<MEDCouplingUMesh> face_mesh2 = faces_mesh->clone(false); // perform a super light copy, no data array copied
      face_mesh2->setName(mfumesh_->getName());  // names have to be aligned ...
      mfumesh_->setMeshAtLevel(-1, face_mesh2, false);
      nfaces = static_cast<int>(faces_mesh->getNumberOfCells());
    }
  else // Boundary mesh only
    {
      MCAuto<MEDCouplingUMesh> boundary_mesh(MEDCouplingUMesh::New(mcumesh_->getName(), mesh_dimension_ - 1));
      boundary_mesh->setCoords(mcumesh_->getCoords());
 
      for (int j = 0; j < noms_bords_and_jnts.size(); j++) nfaces += sz_bords_and_jnts(j);
      boundary_mesh->allocateCells(nfaces);
 
      for (int b=0; b < noms_bords_and_jnts.size(); b++)
        {
          const Frontiere_t& front = ::mes_faces_fr(dom_.valeur(),b);
          const IntTab_t& som_fac = front.les_sommets_des_faces();
          int_t nb_fac = som_fac.dimension(0);
          int nb_som_fac = som_fac.dimension_int(1);
          const Nom& typ_f_trust = front.faces().type(front.faces().type_face());
 
          int boundary_mesh_dimension = -1;
          INTERP_KERNEL::NormalizedCellType typ_fac_mc = type_geo_trio_to_type_medcoupling(typ_f_trust, boundary_mesh_dimension);
          assert(boundary_mesh_dimension == mesh_dimension_ - 1);
 
          // Convert connectivity from TRUST to MED:
          IntTab_t som_fac_cpy = som_fac; // a deep copy since next method modify this in place:
          conn_trust_to_med(som_fac_cpy, typ_f_trust, true);
          // Insert it in the MC mesh, **always as a polygon/segment**:
          for (int_t face_idx=0; face_idx < nb_fac; face_idx++)
            {
              int nvertices = nb_som_fac;
              for (int k = 0; k < nb_som_fac; k++)
                if (som_fac_cpy(face_idx, k) < 0) nvertices--; // Non constant number of vertices (polygons)
              if(std::is_same<_SIZE_, mcIdType>::value)
                {
                  // Wild cast just for compiler (when _SIZE_!=mcIdType) - the test above ensures pointer types are aligned:
                  const mcIdType* where = (mcIdType *)(som_fac_cpy.addr() + face_idx*nb_som_fac);
                  boundary_mesh->insertNextCell(typ_fac_mc, nvertices, where);
                }
              else
                {
                  auto ptr = som_fac_cpy.addr() + face_idx*nb_som_fac;
                  std::vector<mcIdType> tmp(ptr, ptr+nvertices); // will copy and downcast
                  boundary_mesh->insertNextCell(typ_fac_mc, nvertices, tmp.data());
                }
            }
        }
      mfumesh_->setMeshAtLevel(-1, boundary_mesh, false);
    }
 
  // Register groups
  std::vector<const DataArrayIdType *> grps;
  std::vector<MCAuto<DataArrayIdType>> grps_mem;  // just for memory management -> will ensure proper array deletion when destroyed
 
  int_t face_idx = 0, start, end;
  int nb_bords = dom_->nb_front_Cl() + dom_->nb_groupes_faces();
  for (int b=0; b < nb_bords; b++, face_idx=end)  // not joints
    {
      MCAuto<DataArrayIdType> g(DataArrayIdType::New());
      start=face_idx, end=start+sz_bords_and_jnts[b];
      Cerr << " grp " << noms_bords_and_jnts[b] << " " << start << " " << end << finl;
 
      g->alloc(end-start);
      g->iota(start);
      g->setName(noms_bords_and_jnts[b].getChar());
      grps_mem.push_back(g);
      grps.push_back(g);
    }
 
//  [ABN] TODO handle joints properly - they could be written too.
//  // Joint do not necessary have consecutive face numbers and must be handled separately
//  for (int j=0; j < dom_->nb_joints(); j++)
//    {
//      const Joint& jnt = dom_->joint(j);
//      const ArrOfInt& ric = jnt.joint_item(JOINT_ITEM::FACE).items_communs();
//      assert(ric.size_array() == jnt.nb_faces());
//      MCAuto<DataArrayIdType> g(DataArrayIdType::New());
//      g->alloc(ric.size_array());
//      mcIdType* gP = g->getPointer();
//      if (full_face_mesh) // we can preserve original TRUST numbers
//        for (int k=0; k<jnt.nb_faces(); k++) gP[k] = ric(k);
//      else                // otherwise just take next available ids:
//        for (int k=0; k<jnt.nb_faces(); k++) gP[k] = face_idx++;
//      g->setName(jnt.le_nom().getChar());
//      grps_mem.push_back(g);
//      grps.push_back(g);
//    }
  // Save all this:
  mfumesh_->setGroupsAtLevel(-1, grps);
}
 
/*! @brief Ecrit le domaine dom dans le fichier nom_fichier_
 *
 * @param append = false nouveau fichier, append = true ajout du domaine dans le fichier
 */
template <typename _SIZE_>
void Ecrire_MED_32_64<_SIZE_>::ecrire_domaine_dis(bool append)
{
  if (Objet_U::dimension==0)
    Process::exit("Dimension is not defined. Check your data file.");
#ifndef MEDCOUPLING_
  med_non_installe(); // actually MEDCoupling ... but will do.
#else
 
  // Retrieve (or build!) the MEDCouplingUMesh associated with the domain:
  mcumesh_ = dom_->get_mc_mesh();
  mesh_dimension_ = mcumesh_->getMeshDimension();
  MEDCouplingUMesh *mc_no_const = const_cast<MEDCouplingUMesh *>(mcumesh_);  // because of setCoords() and setMeshAtLevel()
 
  // Prepare final MEDFileUMesh object:
  mfumesh_ = MEDFileUMesh::New();
  mfumesh_->setName(mcumesh_->getName());      // name must be provided
  mfumesh_->setCoords(mc_no_const->getCoords());  // should be the same coord array for all levels (i.e. dom->les_sommets())
  mfumesh_->setMeshAtLevel(0, mc_no_const, false);
 
  // Check the mesh
#ifndef NDEBUG
  mcumesh_->checkConsistency();
#endif
 
  // Faces and group of faces representing boundaries:
  fill_faces_and_boundaries();
 
  // Write:
  int option = (append ? 1 : 2); /* 2: reset file. 1: append, 0: overwrite objects */
  Cerr<<"Writing file '" << nom_fichier_<<"' with mesh name '" << mfumesh_->getName() << "' (append=" << (append ? "true": "false") << ") ..."<<finl;
  mfumesh_->write(nom_fichier_.getString(), option);
#endif
}
 
#if INT_is_64_ == 2
template <>
void Ecrire_MED_32_64<trustIdType>::ecrire_domaine_dis(bool append)
{
  Process::exit("Ecrire_MED_32_64<trustIdType>::ecrire_domaine_dis() -- Not allowed with a 64b object!");
}
#endif
 
/*! @brief Permet d'ecrire le tableau de valeurs val comme un champ dans le fichier med de nom nom_fichier_, avec pour support le domaine de nom nom_dom.
 *
 *   @param type: CHAMPPOINT,CHAMPMAILLE,CHAMPFACES
 *   @param nom_cha1 le nom du champ
 *   @param unite : les unites
 *   @param type_elem le type des elems du domaine
 *   @param time le temps
 */
template <typename _SIZE_>
void Ecrire_MED_32_64<_SIZE_>::ecrire_champ(const Nom& type, const Nom& nom_cha1, const DoubleTab& val, const Noms& unite,
                                            const Noms& noms_compo, const Nom& type_elem, double time)
{
  if (Process::nproc()>Process::multiple_files)
    {
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << finl;
      Cerr << "*** WARNING *** The MED post-processing format will generate " << Process::nproc() << " files" << finl;
      Cerr << "This will slow I/O performances since it exceeds the limit of " << Process::multiple_files << finl;
      Cerr << "Use LATA format instead or contact TRUST support team." << finl;
      Cerr << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << finl;
      Cerr << finl;
    }
  const Nom& nom_dom = dom_->le_nom();
#ifdef MEDCOUPLING_
  // Create MEDCouplingField
  MEDCoupling::TypeOfField field_type;
  if (type == "CHAMPMAILLE")
    field_type = MEDCoupling::ON_CELLS;
  else if (type == "CHAMPPOINT")
    field_type = MEDCoupling::ON_NODES;
  else if (type == "CHAMPFACES")
    field_type = MEDCoupling::ON_CELLS;
  else
    {
      Cerr << "Field type " << type << " is not supported yet." << finl;
      Process::exit();
      return;
    }
  std::string file_name = nom_fichier_.getString();
  std::string field_name = nom_cha1.getString();
  // Get the previous timestep:
  if (timestep_.find(field_name)==timestep_.end())
    {
      int timestep = 0;
      std::vector<std::string> field_names = GetAllFieldNames(file_name);
      if (std::find(field_names.begin(), field_names.end(), field_name) != field_names.end())
        {
          std::vector<std::pair<std::pair<int, int>, double> > ts = GetAllFieldIterations(file_name, field_name);
          timestep = ts[ts.size() - 1].first.first + 1;
        }
      timestep_.insert({field_name,timestep});
    }
  else
    timestep_.at(field_name)++;
  MCAuto<MEDCouplingFieldDouble> field(MEDCouplingFieldDouble::New(field_type, MEDCoupling::ONE_TIME));
  field->setName(field_name);
  field->setTime(time, timestep_.at(field_name), -1);
  field->setTimeUnit("s");
 
  // Get directly the U-mesh from the domain, except in some weird cases:
  if (nom_dom == "PARTICULES")
    {
      MEDCoupling::CheckFileForRead(file_name);
      std::string mesh_name = nom_dom.getString();
      MCAuto<MEDFileMesh> mm(MEDFileMesh::New(file_name,mesh_name));
      MEDFileMesh *mmPtr(mm);
      MEDFileUMesh *mmuPtr=dynamic_cast<MEDFileUMesh *>(mmPtr);
      if(!mmuPtr)
        {
          std::ostringstream oss;
          oss << "ReadUMeshFromFile : With fileName=\""<< file_name << "\", meshName=\""<< mesh_name << "\" exists but it is not an unstructured mesh !";
          throw INTERP_KERNEL::Exception(oss.str());
        }
      const MCAuto<MEDCouplingUMesh> umesh_particles = mmuPtr->getMeshAtLevel(1);
      field->setMesh(umesh_particles);
    }
  else
    {
      if (type == "CHAMPFACES")
        field->setMesh(domaine_dis_->get_mc_face_mesh());
      else
        field->setMesh(dom_->get_mc_mesh());
    }
 
  // Fill array:
  int size = val.dimension(0);
  if (size>0)
    {
      int nb_comp = val.nb_dim() == 1 ? 1 : val.dimension(1);
      MCAuto<DataArrayDouble> array(DataArrayDouble::New());
      array->useArray(val.addr(), false, MEDCoupling::DeallocType::CPP_DEALLOC, size, nb_comp);
      // Units:
 
      if (nb_comp > 1)
        for (int i = 0; i < nb_comp; i++)
          array->setInfoOnComponent(i, "[" + unite[i].getString() + "]");
      else
        array->setInfoOnComponent(0, "[" + unite[0].getString() + "]");
      field->setArray(array);
      // Write
      MCAuto<MEDFileField1TS> file(MEDFileField1TS::New());
      file->setFieldNoProfileSBT(field);
      file->write(file_name, 0);
    }
#else
  med_non_installe();
#endif
}
 
#if INT_is_64_ == 2
template <>
void Ecrire_MED_32_64<trustIdType>::ecrire_champ(const Nom& type, const Nom& nom_cha1, const DoubleTab& val, const Noms& unite,
                                                 const Noms& noms_compo, const Nom& type_elem, double time)
{
  Process::exit("Ecrire_MED_32_64<trustIdType>::ecrire_champ() -- Not allowed with a 64b object!");
}
#endif
 
 
#endif
 
 
template class Ecrire_MED_32_64<int>;
#if INT_is_64_ == 2
template class Ecrire_MED_32_64<trustIdType>;
#endif