X-Git-Url: http://git.salome-platform.org/gitweb/?a=blobdiff_plain;f=src%2FMEDLoader%2FMEDLoader.cxx;h=687d0bcbf35a6d6c4b3b25c6b29c96bf83af4a3b;hb=f2ab61e92f55ee52cf5196f7904f625d93c8c2d0;hp=c6ad9872ee2da1a14a4b48be2ef06bea57d3d16e;hpb=5da72d398d0eb1820c3ce6dd90b8579b6b14edf5;p=tools%2Fmedcoupling.git

diff --git a/src/MEDLoader/MEDLoader.cxx b/src/MEDLoader/MEDLoader.cxx
index c6ad9872e..687d0bcbf 100644
--- a/src/MEDLoader/MEDLoader.cxx
+++ b/src/MEDLoader/MEDLoader.cxx
@@ -1,4 +1,4 @@
-// Copyright (C) 2007-2016  CEA/DEN, EDF R&D
+// Copyright (C) 2007-2020  CEA/DEN, EDF R&D
 //
 // This library is free software; you can redistribute it and/or
 // modify it under the terms of the GNU Lesser General Public
@@ -21,6 +21,7 @@
 #include "MEDLoader.hxx"
 #include "MEDLoaderBase.hxx"
 #include "MEDFileUtilities.hxx"
+#include "MEDLoaderNS.hxx"
 #include "MEDFileSafeCaller.txx"
 #include "MEDFileMesh.hxx"
 #include "MEDFileField.hxx"
@@ -28,7 +29,10 @@
 #include "MEDCouplingUMesh.hxx"
 #include "MEDCouplingMemArray.hxx"
 #include "MEDCouplingFieldDouble.hxx"
+#include "MEDCouplingFieldFloat.hxx"
+#include "MEDCouplingFieldInt32.hxx"
 #include "MEDCouplingGaussLocalization.hxx"
+#include "MEDCouplingTraits.hxx"
 #include "MCAuto.hxx"
 
 #include "InterpKernelAutoPtr.hxx"
@@ -43,7 +47,7 @@
 #include <numeric>
 #include <iterator>
 #include <algorithm>
-
+#include <memory>
 
 med_geometry_type typmai[MED_N_CELL_FIXED_GEO] = { MED_POINT1,
   MED_SEG2,
@@ -63,6 +67,7 @@ med_geometry_type typmai[MED_N_CELL_FIXED_GEO] = { MED_POINT1,
   MED_TETRA10,
   MED_PYRA13,
   MED_PENTA15,
+  MED_PENTA18,
   MED_HEXA20,
   MED_HEXA27,
   MED_POLYGON,
@@ -89,13 +94,14 @@ INTERP_KERNEL::NormalizedCellType typmai2[MED_N_CELL_FIXED_GEO] = { INTERP_KERNE
   INTERP_KERNEL::NORM_TETRA10,
   INTERP_KERNEL::NORM_PYRA13,
   INTERP_KERNEL::NORM_PENTA15,
+  INTERP_KERNEL::NORM_PENTA18,
   INTERP_KERNEL::NORM_HEXA20,
   INTERP_KERNEL::NORM_HEXA27,
   INTERP_KERNEL::NORM_POLYGON,
   INTERP_KERNEL::NORM_QPOLYG,
   INTERP_KERNEL::NORM_POLYHED };
 
-med_geometry_type typmai3[34] = { MED_POINT1,//0
+med_geometry_type typmai3[INTERP_KERNEL::NORM_MAXTYPE] = { MED_POINT1,//0
   MED_SEG2,//1
   MED_SEG3,//2
   MED_TRIA3,//3
@@ -123,12 +129,11 @@ med_geometry_type typmai3[34] = { MED_POINT1,//0
   MED_PENTA15,//25
   MED_NONE,//26
   MED_HEXA27,//27
-  MED_NONE,//28
+  MED_PENTA18,//28
   MED_NONE,//29
   MED_HEXA20,//30
   MED_POLYHEDRON,//31
-  MED_POLYGON2,//32
-  MED_NONE//33
+  MED_POLYGON2//32
 };
 
 double _EPS_FOR_NODE_COMP=1.e-12;
@@ -141,20 +146,20 @@ using namespace MEDCoupling;
 
 /// @cond INTERNAL
 
-namespace MEDLoaderNS
+INTERP_KERNEL::NormalizedCellType ConvertGeometryType(med_geometry_type geotype)
 {
-  int readUMeshDimFromFile(const std::string& fileName, const std::string& meshName, std::vector<int>& possibilities);
-  void dispatchElems(int nbOfElemCell, int nbOfElemFace, int& nbOfElem, med_entity_type& whichEntity);
-  void writeFieldWithoutReadingAndMappingOfMeshInFile(const std::string& fileName, const MEDCoupling::MEDCouplingFieldDouble *f, bool writeFromScratch);
-  med_int getIdFromMeshName(med_idt fid, const std::string& meshName, std::string& trueMeshName);
-  std::vector<std::string> getMeshNamesFid(med_idt fid);
+  INTERP_KERNEL::NormalizedCellType result=INTERP_KERNEL::NORM_ERROR;
+  for(int i=0; i<MED_N_CELL_FIXED_GEO; i++)
+    {
+      if (typmai[i]==geotype)
+        {
+          result=typmai2[i];
+          break;
+        }
+    }
+  return result;
 }
 
-/// @endcond
-
-
-/// @cond INTERNAL
-
 /*!
  * This method returns a first quick overview of mesh with name \a meshName into the file \a fileName.
  * @param possibilities the relativeToMeshDim authorized to returned maxdim. This vector is systematically cleared at the begin of this method.
@@ -163,7 +168,7 @@ namespace MEDLoaderNS
 int MEDLoaderNS::readUMeshDimFromFile(const std::string& fileName, const std::string& meshName, std::vector<int>& possibilities)
 {
   possibilities.clear();
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   int ret;
   std::set<int> poss;
   char nommaa[MED_NAME_SIZE+1];
@@ -171,12 +176,12 @@ int MEDLoaderNS::readUMeshDimFromFile(const std::string& fileName, const std::st
   med_mesh_type type_maillage;
   med_int Sdim,Mdim;
   std::string trueMeshName;
-  med_int meshId=getIdFromMeshName(fid,meshName,trueMeshName);
+  int meshId=FromMedInt<int>(getIdFromMeshName(fid,meshName,trueMeshName));
   INTERP_KERNEL::AutoPtr<char> dt_unit=MEDLoaderBase::buildEmptyString(MED_LNAME_SIZE);
   med_sorting_type sortingType;
   med_int nstep;
   med_axis_type axisType;
-  int naxis(MEDmeshnAxis(fid,meshId));
+  med_int naxis(MEDmeshnAxis(fid,meshId));
   INTERP_KERNEL::AutoPtr<char> axisname=MEDLoaderBase::buildEmptyString(naxis*MED_SNAME_SIZE);
   INTERP_KERNEL::AutoPtr<char> axisunit=MEDLoaderBase::buildEmptyString(naxis*MED_SNAME_SIZE);
   MEDFILESAFECALLERRD0(MEDmeshInfo,(fid,meshId,nommaa,&Sdim,&Mdim,&type_maillage,maillage_description,dt_unit,&sortingType,&nstep,&axisType,axisname,axisunit));
@@ -193,9 +198,9 @@ int MEDLoaderNS::readUMeshDimFromFile(const std::string& fileName, const std::st
     {
       med_geometry_type curMedType=typmai[i];
       med_bool changement,transformation;
-      int curNbOfElemM(MEDmeshnEntity(fid,nommaa,numdt,numit,MED_CELL,curMedType,MED_CONNECTIVITY,MED_NODAL,&changement,&transformation));
-      int curNbOfElemF(MEDmeshnEntity(fid,nommaa,numdt,numit,MED_CELL,curMedType,MED_CONNECTIVITY,MED_NODAL,&changement,&transformation));//limitation
-      int curNbOfElem;
+      med_int curNbOfElemM(MEDmeshnEntity(fid,nommaa,numdt,numit,MED_CELL,curMedType,MED_CONNECTIVITY,MED_NODAL,&changement,&transformation));
+      med_int curNbOfElemF(MEDmeshnEntity(fid,nommaa,numdt,numit,MED_CELL,curMedType,MED_CONNECTIVITY,MED_NODAL,&changement,&transformation));//limitation
+      med_int curNbOfElem;
       med_entity_type whichEntity;
       MEDLoaderNS::dispatchElems(curNbOfElemM,curNbOfElemF,curNbOfElem,whichEntity);
       if(curNbOfElem>0)
@@ -216,8 +221,8 @@ int MEDLoaderNS::readUMeshDimFromFile(const std::string& fileName, const std::st
   return ret;
 }
 
-med_int MEDLoaderNS::getIdFromMeshName(med_idt fid, const std::string& meshName, std::string& trueMeshName)
-    {
+int MEDLoaderNS::getIdFromMeshName(med_idt fid, const std::string& meshName, std::string& trueMeshName)
+{
   if(meshName.empty())
     {
       std::vector<std::string> meshes=getMeshNamesFid(fid);
@@ -239,8 +244,8 @@ med_int MEDLoaderNS::getIdFromMeshName(med_idt fid, const std::string& meshName,
       throw INTERP_KERNEL::Exception(os2.str().c_str());
     }
   trueMeshName=meshName;
-  return iter-meshes.begin()+1;
-    }
+  return (int)( iter-meshes.begin()+1 );
+}
 
 std::vector<std::string> MEDLoaderNS::getMeshNamesFid(med_idt fid)
 {
@@ -256,10 +261,10 @@ std::vector<std::string> MEDLoaderNS::getMeshNamesFid(med_idt fid)
   std::vector<std::string> ret(n);
   for(int i=0;i<n;i++)
     {
-      int naxis(MEDmeshnAxis(fid,i+1));
+      med_int naxis(MEDmeshnAxis(fid,i+1));
       INTERP_KERNEL::AutoPtr<char> axisname=MEDLoaderBase::buildEmptyString(naxis*MED_SNAME_SIZE);
       INTERP_KERNEL::AutoPtr<char> axisunit=MEDLoaderBase::buildEmptyString(naxis*MED_SNAME_SIZE);
-      int nstep;
+      med_int nstep;
       MEDFILESAFECALLERRD0(MEDmeshInfo,(fid,i+1,nommaa,&space_dim,&mesh_dim,&type_maillage,maillage_description,dtunit,&stype,&nstep,&axistype,axisname,axisunit));
       std::string cur=MEDLoaderBase::buildStringFromFortran(nommaa,sizeof(nommaa));
       ret[i]=cur;
@@ -270,7 +275,7 @@ std::vector<std::string> MEDLoaderNS::getMeshNamesFid(med_idt fid)
 /*!
  * This methods allows to merger all entities and to considerate only cell types.
  */
-void MEDLoaderNS::dispatchElems(int nbOfElemCell, int nbOfElemFace, int& nbOfElem, med_entity_type& whichEntity)
+void MEDLoaderNS::dispatchElems(med_int nbOfElemCell, med_int nbOfElemFace, med_int& nbOfElem, med_entity_type& whichEntity)
 {
   if(nbOfElemCell>=nbOfElemFace)
     {
@@ -302,18 +307,59 @@ bool MEDCoupling::HasXDR()
 
 std::string MEDCoupling::MEDFileVersionStr()
 {
-  return std::string(MED_VERSION_STR);
+  const int SZ=20;
+  char buf[SZ];
+  std::fill(buf,buf+SZ,'\0');
+  const char START_EXPECTED[]="MED-";
+  med_err ret(MEDlibraryStrVersion(buf));
+  if(ret!=0)
+    throw INTERP_KERNEL::Exception("MEDFileVersionStr : fail to find version of MED file ! It looks very bad !");
+  std::string zeRet(buf);
+  std::size_t pos(zeRet.find(START_EXPECTED,0));
+  if(pos!=0)
+    {
+      std::ostringstream oss; oss << "MEDFileVersionStr : internal error ! The MEDFile returned version (\"" << zeRet << "\") has not the right pattern !";
+      throw INTERP_KERNEL::Exception(oss.str());
+    }
+  return zeRet.substr(sizeof(START_EXPECTED)-1,std::string::npos);
+}
+
+std::string MEDCoupling::MEDFileVersionOfFileStr(const std::string& fileName)
+{
+#if MED_NUM_MAJEUR>3 || ( MED_NUM_MAJEUR==3 && ( (MED_NUM_MINEUR==2 && MED_NUM_RELEASE>=1) || MED_NUM_MINEUR>=3) )
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
+  const int SZ=20;
+  const char START_EXPECTED[]="MED-";
+  char buf[SZ];
+  std::fill(buf,buf+SZ,'\0');
+  MEDFILESAFECALLERRD0(MEDfileStrVersionRd,(fid,buf));
+  std::string ret(buf);
+  std::size_t pos(ret.find(START_EXPECTED,0));
+  if(pos!=0)
+    {
+      std::ostringstream oss; oss << "MEDFileVersionOfFileStr : internal error ! The MEDFile returned version (\"" << ret << "\") has not the right pattern !";
+      throw INTERP_KERNEL::Exception(oss.str());
+    }
+  return ret.substr(sizeof(START_EXPECTED)-1,std::string::npos);
+#else
+  std::ostringstream oss; oss << "MEDFileVersionOfFileStr : is implemented with MEDFile " << MEDFileVersionStr() << " ! If you need this feature please use version >= 3.2.1.";
+  throw INTERP_KERNEL::Exception(oss.str());
+#endif
 }
 
 void MEDCoupling::MEDFileVersion(int& major, int& minor, int& release)
 {
-  major=MED_NUM_MAJEUR;
-  minor=MED_NUM_MINEUR;
-  release=MED_NUM_RELEASE;
+  med_int majj,minn,rell;
+  med_err ret(MEDlibraryNumVersion(&majj,&minn,&rell));
+  if(ret!=0)
+    throw INTERP_KERNEL::Exception("MEDFileVersion : fail to call MEDlibraryNumVersion ! It looks very bad !");
+  major=FromMedInt<int>(majj);
+  minor=FromMedInt<int>(minn);
+  release=FromMedInt<int>(rell);
 }
 
 /*!
- * This method sets the epsilon value used for node comparison when trying to buid a profile for a field on node/cell on an already written mesh.
+ * This method sets the epsilon value used for node comparison when trying to build a profile for a field on node/cell on an already written mesh.
  */
 void MEDCoupling::SetEpsilonForNodeComp(double val)
 {
@@ -345,24 +391,25 @@ void MEDCoupling::SetTooLongStrPolicy(int val)
  * - the space dimension
  * - the number of nodes
  */
-std::vector< std::vector< std::pair<INTERP_KERNEL::NormalizedCellType,int> > > MEDCoupling::GetUMeshGlobalInfo(const std::string& fileName, const std::string& meshName, int &meshDim, int& spaceDim, int& numberOfNodes)
+std::vector< std::vector< std::pair<INTERP_KERNEL::NormalizedCellType,int> > > MEDCoupling::GetUMeshGlobalInfo(const std::string& fileName, const std::string& meshName, int &meshDim, int& spaceDim, mcIdType& numberOfNodes)
 {
-  CheckFileForRead(fileName);
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   std::set<int> poss;
   char nommaa[MED_NAME_SIZE+1];
   char maillage_description[MED_COMMENT_SIZE+1];
   med_mesh_type type_maillage;
   std::string trueMeshName;
-  med_int meshId=MEDLoaderNS::getIdFromMeshName(fid,meshName,trueMeshName);
+  int meshId=MEDLoaderNS::getIdFromMeshName(fid,meshName,trueMeshName);
   INTERP_KERNEL::AutoPtr<char> dt_unit=MEDLoaderBase::buildEmptyString(MED_LNAME_SIZE);
   med_sorting_type sortingType;
-  med_int nstep;
+  med_int nstep, mDim, sDim;
   med_axis_type axisType;
-  int naxis(MEDmeshnAxis(fid,meshId));
+  med_int naxis(MEDmeshnAxis(fid,meshId));
   INTERP_KERNEL::AutoPtr<char> axisname=MEDLoaderBase::buildEmptyString(naxis*MED_SNAME_SIZE);
   INTERP_KERNEL::AutoPtr<char> axisunit=MEDLoaderBase::buildEmptyString(naxis*MED_SNAME_SIZE);
-  MEDFILESAFECALLERRD0(MEDmeshInfo,(fid,meshId,nommaa,&spaceDim,&meshDim,&type_maillage,maillage_description,dt_unit,&sortingType,&nstep,&axisType,axisname,axisunit));
+  MEDFILESAFECALLERRD0(MEDmeshInfo,(fid,meshId,nommaa,&sDim,&mDim,&type_maillage,maillage_description,dt_unit,&sortingType,&nstep,&axisType,axisname,axisunit));
+  meshDim=FromMedInt<int>(mDim);
+  spaceDim=FromMedInt<int>(sDim);
   if(type_maillage!=MED_UNSTRUCTURED_MESH)
     {
       std::ostringstream oss; oss << "GetUMeshGlobalInfo : Mesh \""<< meshName << "\" in file \"" << fileName;
@@ -382,7 +429,7 @@ std::vector< std::vector< std::pair<INTERP_KERNEL::NormalizedCellType,int> > > M
   for(int i=0;i<MED_N_CELL_FIXED_GEO;i++)
     {
       med_geometry_type curMedType=typmai[i];
-      int curNbOfElemM(MEDmeshnEntity(fid,nommaa,numdt,numit,MED_CELL,curMedType,MED_CONNECTIVITY,MED_NODAL,&changement,&transformation));
+      med_int curNbOfElemM(MEDmeshnEntity(fid,nommaa,numdt,numit,MED_CELL,curMedType,MED_CONNECTIVITY,MED_NODAL,&changement,&transformation));
       if(curNbOfElemM>0)
         {
           INTERP_KERNEL::NormalizedCellType typp=typmai2[i];
@@ -399,7 +446,7 @@ std::vector< std::vector< std::pair<INTERP_KERNEL::NormalizedCellType,int> > > M
     {
       ret[maxLev-dims[i]].push_back(geoTypes[i]);
     }
-  numberOfNodes=MEDmeshnEntity(fid,nommaa,numdt,numit,MED_NODE,MED_NONE,MED_COORDINATE,MED_NO_CMODE,&changement,&transformation);
+  numberOfNodes=ToIdType(MEDmeshnEntity(fid,nommaa,numdt,numit,MED_NODE,MED_NONE,MED_COORDINATE,MED_NO_CMODE,&changement,&transformation));
   return ret;
 }
 
@@ -410,16 +457,13 @@ void MEDCoupling::CheckFileForRead(const std::string& fileName)
 
 std::vector<std::string> MEDCoupling::GetMeshNames(const std::string& fileName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
-  std::vector<std::string> ret=MEDLoaderNS::getMeshNamesFid(fid);
-  return ret;
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
+  return MEDLoaderNS::getMeshNamesFid(fid);
 }
 
 std::vector< std::pair<std::string,std::string> > MEDCoupling::GetComponentsNamesOfField(const std::string& fileName, const std::string& fieldName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nbFields(MEDnField(fid));
   std::vector<std::string> fields(nbFields);
   med_field_type typcha;
@@ -452,12 +496,42 @@ std::vector< std::pair<std::string,std::string> > MEDCoupling::GetComponentsName
   throw INTERP_KERNEL::Exception(oss.str().c_str());
 }
 
+// see reference : https://en.cppreference.com/w/cpp/iterator/iterator
+class MEDVectorStringIterator : public std::iterator< std::input_iterator_tag, long, long, const std::string*, std::string >
+{
+  long _num = 0;
+  char *_data = nullptr;
+public:
+  explicit MEDVectorStringIterator(long num , char *data) : _num(num),_data(data) {}
+  MEDVectorStringIterator& operator++() { ++_num; return *this;}
+  bool operator==(const MEDVectorStringIterator& other) const {return _num == other._num;}
+  bool operator!=(const MEDVectorStringIterator& other) const {return !(*this == other);}
+  reference operator*() const {return MEDLoaderBase::buildStringFromFortran(_data+_num*MED_LNAME_SIZE,MED_LNAME_SIZE);}
+};
+
+void MEDCoupling::GetFamiliesGroupsInfo(const std::string& fileName, const std::string& meshName, std::map<std::string,mcIdType>& families, std::map<std::string,std::vector<std::string>>& groupsOnFam)
+{
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
+  med_int nbFams(MEDnFamily(fid,meshName.c_str()));
+  char nomfam[MED_NAME_SIZE+1];
+  for(med_int i=0;i<nbFams;++i)
+    {
+      med_int nbGrps(MEDnFamilyGroup(fid,meshName.c_str(),i+1)),famId;
+      std::unique_ptr<char[]> gro{new char[MED_LNAME_SIZE*nbGrps+1]};
+      MEDFILESAFECALLERRD0(MEDfamilyInfo,(fid,meshName.c_str(),i+1,nomfam,&famId,gro.get()));
+      std::string fam(MEDLoaderBase::buildStringFromFortran(nomfam,MED_NAME_SIZE));
+      families[fam] = FromMedInt<mcIdType>(famId);
+      std::vector<std::string> v(nbGrps);
+      std::copy(MEDVectorStringIterator(0,gro.get()),MEDVectorStringIterator(nbGrps,gro.get()),v.begin());
+      groupsOnFam[fam] = v;
+    }
+}
+
 std::vector<std::string> MEDCoupling::GetMeshNamesOnField(const std::string& fileName, const std::string& fieldName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
   std::vector<std::string> ret;
   //
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nbFields=MEDnField(fid);
   //
   med_field_type typcha;
@@ -483,15 +557,14 @@ std::vector<std::string> MEDCoupling::GetMeshNamesOnField(const std::string& fil
 
 std::vector<std::string> MEDCoupling::GetMeshFamiliesNames(const std::string& fileName, const std::string& meshName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nfam=MEDnFamily(fid,meshName.c_str());
   std::vector<std::string> ret(nfam);
   char nomfam[MED_NAME_SIZE+1];
   med_int numfam;
   for(int i=0;i<nfam;i++)
     {
-      int ngro=MEDnFamilyGroup(fid,meshName.c_str(),i+1);
+      med_int ngro=MEDnFamilyGroup(fid,meshName.c_str(),i+1);
       med_int natt=MEDnFamily23Attribute(fid,meshName.c_str(),i+1);
       INTERP_KERNEL::AutoPtr<med_int> attide=new med_int[natt];
       INTERP_KERNEL::AutoPtr<med_int> attval=new med_int[natt];
@@ -507,15 +580,14 @@ std::vector<std::string> MEDCoupling::GetMeshFamiliesNames(const std::string& fi
 
 std::vector<std::string> MEDCoupling::GetMeshFamiliesNamesOnGroup(const std::string& fileName, const std::string& meshName, const std::string& grpName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nfam=MEDnFamily(fid,meshName.c_str());
   std::vector<std::string> ret;
   char nomfam[MED_NAME_SIZE+1];
   med_int numfam;
   for(int i=0;i<nfam;i++)
     {
-      int ngro=MEDnFamilyGroup(fid,meshName.c_str(),i+1);
+      med_int ngro=MEDnFamilyGroup(fid,meshName.c_str(),i+1);
       med_int natt=MEDnFamily23Attribute(fid,meshName.c_str(),i+1);
       INTERP_KERNEL::AutoPtr<med_int> attide=new med_int[natt];
       INTERP_KERNEL::AutoPtr<med_int> attval=new med_int[natt];
@@ -535,16 +607,15 @@ std::vector<std::string> MEDCoupling::GetMeshFamiliesNamesOnGroup(const std::str
 
 std::vector<std::string> MEDCoupling::GetMeshGroupsNamesOnFamily(const std::string& fileName, const std::string& meshName, const std::string& famName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
-  med_int nfam=MEDnFamily(fid,meshName.c_str());
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
+  med_int nfam(MEDnFamily(fid,meshName.c_str()));
   std::vector<std::string> ret;
   char nomfam[MED_NAME_SIZE+1];
   med_int numfam;
   bool found=false;
   for(int i=0;i<nfam && !found;i++)
     {
-      int ngro=MEDnFamilyGroup(fid,meshName.c_str(),i+1);
+      med_int ngro=MEDnFamilyGroup(fid,meshName.c_str(),i+1);
       med_int natt=MEDnFamily23Attribute(fid,meshName.c_str(),i+1);
       INTERP_KERNEL::AutoPtr<med_int> attide=new med_int[natt];
       INTERP_KERNEL::AutoPtr<med_int> attval=new med_int[natt];
@@ -572,15 +643,14 @@ std::vector<std::string> MEDCoupling::GetMeshGroupsNamesOnFamily(const std::stri
 
 std::vector<std::string> MEDCoupling::GetMeshGroupsNames(const std::string& fileName, const std::string& meshName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nfam=MEDnFamily(fid,meshName.c_str());
   std::vector<std::string> ret;
   char nomfam[MED_NAME_SIZE+1];
   med_int numfam;
   for(int i=0;i<nfam;i++)
     {
-      int ngro=MEDnFamilyGroup(fid,meshName.c_str(),i+1);
+      med_int ngro=MEDnFamilyGroup(fid,meshName.c_str(),i+1);
       med_int natt=MEDnFamily23Attribute(fid,meshName.c_str(),i+1);
       INTERP_KERNEL::AutoPtr<med_int> attide=new med_int[natt];
       INTERP_KERNEL::AutoPtr<med_int> attval=new med_int[natt];
@@ -632,9 +702,8 @@ std::vector<MEDCoupling::TypeOfField> MEDCoupling::GetTypesOfField(const std::st
 
 std::vector<std::string> MEDCoupling::GetAllFieldNames(const std::string& fileName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
   std::vector<std::string> ret;
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nbFields=MEDnField(fid);
   med_field_type typcha;
   for(int i=0;i<nbFields;i++)
@@ -655,9 +724,8 @@ std::vector<std::string> MEDCoupling::GetAllFieldNames(const std::string& fileNa
 
 std::vector<std::string> MEDCoupling::GetAllFieldNamesOnMesh(const std::string& fileName, const std::string& meshName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
   std::vector<std::string> ret;
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nbFields=MEDnField(fid);
   //
   med_field_type typcha;
@@ -700,9 +768,8 @@ std::vector<std::string> MEDCoupling::GetFieldNamesOnMesh(MEDCoupling::TypeOfFie
 
 std::vector<std::string> MEDCoupling::GetCellFieldNamesOnMesh(const std::string& fileName, const std::string& meshName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
   std::vector<std::string> ret;
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nbFields=MEDnField(fid);
   //
   med_field_type typcha;
@@ -725,7 +792,7 @@ std::vector<std::string> MEDCoupling::GetCellFieldNamesOnMesh(const std::string&
       MEDFILESAFECALLERRD0(MEDfieldInfo,(fid,i+1,nomcha,maa_ass,&localmesh,&typcha,comp,unit,dt_unit,&nbPdt));
       std::string curFieldName=MEDLoaderBase::buildStringFromFortran(nomcha,MED_NAME_SIZE+1);
       std::string curMeshName=MEDLoaderBase::buildStringFromFortran(maa_ass,MED_NAME_SIZE+1);
-      int profilesize,nbi;
+      med_int profilesize,nbi;
       if(curMeshName==meshName)
         {
           bool found=false;
@@ -750,9 +817,8 @@ std::vector<std::string> MEDCoupling::GetCellFieldNamesOnMesh(const std::string&
 
 std::vector<std::string> MEDCoupling::GetNodeFieldNamesOnMesh(const std::string& fileName, const std::string& meshName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
   std::vector<std::string> ret;
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nbFields=MEDnField(fid);
   char pflname[MED_NAME_SIZE+1]="";
   char locname[MED_NAME_SIZE+1]="";
@@ -776,7 +842,7 @@ std::vector<std::string> MEDCoupling::GetNodeFieldNamesOnMesh(const std::string&
       std::string curMeshName=MEDLoaderBase::buildStringFromFortran(maa_ass,MED_NAME_SIZE+1);
       if(nbPdt>0)
         {
-          int profilesize,nbi;
+          med_int profilesize,nbi;
           MEDFILESAFECALLERRD0(MEDfieldComputingStepInfo,(fid,nomcha,1,&numdt,&numo,&dt));
           med_int nbOfVal(MEDfieldnValueWithProfile(fid,nomcha,numdt,numo,MED_NODE,MED_NONE,1,MED_COMPACT_PFLMODE,
                                                     pflname,&profilesize,locname,&nbi));
@@ -791,9 +857,8 @@ std::vector<std::string> MEDCoupling::GetNodeFieldNamesOnMesh(const std::string&
 
 std::vector< std::pair< std::pair<int,int>, double> > MEDCoupling::GetAllFieldIterations(const std::string& fileName, const std::string& fieldName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
   std::vector< std::pair< std::pair<int,int>, double > > ret;
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nbFields=MEDnField(fid);
   //
   med_field_type typcha;
@@ -834,8 +899,7 @@ std::vector< std::pair< std::pair<int,int>, double> > MEDCoupling::GetAllFieldIt
 
 double MEDCoupling::GetTimeAttachedOnFieldIteration(const std::string& fileName, const std::string& fieldName, int iteration, int order)
 {
-  MEDCoupling::CheckFileForRead(fileName);
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nbFields=MEDnField(fid);
   //
   med_field_type typcha;
@@ -896,10 +960,9 @@ std::vector< std::pair<int,int> > MEDCoupling::GetFieldIterations(MEDCoupling::T
 
 std::vector< std::pair<int,int> > MEDCoupling::GetCellFieldIterations(const std::string& fileName, const std::string& meshName, const std::string& fieldName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
   std::string meshNameCpp(meshName);
   std::vector< std::pair<int,int> > ret;
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nbFields=MEDnField(fid);
   //
   med_field_type typcha;
@@ -929,7 +992,7 @@ std::vector< std::pair<int,int> > MEDCoupling::GetCellFieldIterations(const std:
             {
               for(int k=0;k<nbPdt;k++)
                 {
-                  int profilesize,nbi;
+                  med_int profilesize,nbi;
                   MEDFILESAFECALLERRD0(MEDfieldComputingStepInfo,(fid,nomcha,k+1,&numdt,&numo,&dt));
                   med_int nbOfVal(MEDfieldnValueWithProfile(fid,nomcha,numdt,numo,MED_CELL,typmai[j],1,MED_COMPACT_PFLMODE,
                                                             pflname,&profilesize,locname,&nbi));
@@ -968,10 +1031,9 @@ std::vector< std::pair<int,int> > MEDCoupling::GetCellFieldIterations(const std:
 
 std::vector< std::pair<int,int> > MEDCoupling::GetNodeFieldIterations(const std::string& fileName, const std::string& meshName, const std::string& fieldName)
 {
-  MEDCoupling::CheckFileForRead(fileName);
   std::string meshNameCpp(meshName);
   std::vector< std::pair<int,int> > ret;
-  MEDFileUtilities::AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
+  MEDFileUtilities::AutoFid fid(MEDCoupling::OpenMEDFileForRead(fileName));
   med_int nbFields=MEDnField(fid);
   //
   med_field_type typcha;
@@ -998,7 +1060,7 @@ std::vector< std::pair<int,int> > MEDCoupling::GetNodeFieldIterations(const std:
         {
           for(int k=0;k<nbPdt;k++)
             {
-              int profilesize,nbi;
+              med_int profilesize,nbi;
               MEDFILESAFECALLERRD0(MEDfieldComputingStepInfo,(fid,nomcha,k+1,&numdt,&numo,&dt));
               med_int nbOfVal(MEDfieldnValueWithProfile(fid,nomcha,numdt,numo,MED_NODE,MED_NONE,1,MED_COMPACT_PFLMODE,
                                                         pflname,&profilesize,locname,&nbi));
@@ -1142,7 +1204,84 @@ MEDCoupling::MEDCouplingUMesh *MEDCoupling::ReadUMeshFromGroups(const std::strin
   return mmuPtr->getGroups(meshDimRelToMax,grps,true);
 }
 
-MEDCoupling::MEDCouplingFieldDouble *MEDCoupling::ReadField(MEDCoupling::TypeOfField type, const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
+MCAuto<MEDCoupling::MEDCouplingField> MEDCoupling::ReadField(const std::string& fileName)
+{
+  std::vector<std::string> fieldNames(GetAllFieldNames(fileName));
+  std::size_t sz(fieldNames.size());
+  if(sz==0)
+    {
+      std::ostringstream oss;
+      oss << "The file \"" << fileName << "\" contains no field !";
+      throw INTERP_KERNEL::Exception(oss.str());
+    }
+  if(sz>1)
+    {
+      std::ostringstream oss;
+      oss << "In file \"" << fileName << "\" there are more than one field !" << std::endl;
+      oss << "You are invited to use ReadField(fileName, fieldName) instead to avoid misleading concerning field you want to read !" << std::endl;
+      oss << "For information, fields available are :" << std::endl;
+      for(std::vector<std::string>::const_iterator it=fieldNames.begin();it!=fieldNames.end();it++)
+        oss << " - \"" << *it << "\"" << std::endl;
+      throw INTERP_KERNEL::Exception(oss.str());
+    }
+  return ReadField(fileName,fieldNames[0]);
+}
+
+MCAuto<MEDCoupling::MEDCouplingField> MEDCoupling::ReadField(const std::string& fileName, const std::string& fieldName)
+{
+  std::vector< std::pair< std::pair<int,int>, double> > iterations(GetAllFieldIterations(fileName,fieldName));
+  std::size_t sz(iterations.size());
+  if(sz==0)
+    {
+      std::ostringstream oss;
+      oss << "In file \"" << fileName << "\" field \"" << fieldName << "\" exists but with no time steps !";
+      throw INTERP_KERNEL::Exception(oss.str());
+    }
+  if(sz>1)
+    {
+      std::ostringstream oss;
+      oss << "In file \"" << fileName << "\" field \"" << fieldName << "\" exists but with more than one time steps !" << std::endl;
+      oss << "You are invited to use ReadField(fileName, fieldName, iteration, order) instead to avoid misleading concerning time steps." << std::endl;
+      oss << "For information, time steps available for field \"" << fieldName << "\" are :" << std::endl;
+      for(std::vector< std::pair< std::pair<int,int>, double> >::const_iterator it=iterations.begin();it!=iterations.end();it++)
+        oss << " - " << (*it).first.first << ", " << (*it).first.second << " (" << (*it).second << ")" << std::endl;
+      throw INTERP_KERNEL::Exception(oss.str());
+    }
+  return ReadField(fileName,fieldName,iterations[0].first.first,iterations[0].first.second);
+}
+
+MCAuto<MEDCoupling::MEDCouplingField> MEDCoupling::ReadField(const std::string& fileName, const std::string& fieldName, int iteration, int order)
+{
+  MCAuto<MEDFileAnyTypeField1TS> f(MEDFileAnyTypeField1TS::New(fileName,fieldName,iteration,order));
+  MCAuto<MEDFileMesh> mesh(MEDFileMesh::New(fileName,f->getMeshName()));
+  {
+    MCAuto<MEDFileField1TS> f1(MEDCoupling::DynamicCast<MEDFileAnyTypeField1TS,MEDFileField1TS>(f));
+    if(f1.isNotNull())
+      {
+        MCAuto<MEDCoupling::MEDCouplingFieldDouble> ret(f1->field(mesh));
+        return MEDCoupling::DynamicCast<MEDCouplingFieldDouble,MEDCouplingField>(ret);
+      }
+  }
+  {
+    MCAuto<MEDFileInt32Field1TS> f1(MEDCoupling::DynamicCast<MEDFileAnyTypeField1TS,MEDFileInt32Field1TS>(f));
+    if(f1.isNotNull())
+      {
+        MCAuto<MEDCoupling::MEDCouplingFieldInt32> ret(f1->field(mesh));
+        return MEDCoupling::DynamicCast<MEDCouplingFieldInt32,MEDCouplingField>(ret);
+      }
+  }
+  {
+    MCAuto<MEDFileFloatField1TS> f1(MEDCoupling::DynamicCast<MEDFileAnyTypeField1TS,MEDFileFloatField1TS>(f));
+    if(f1.isNotNull())
+      {
+        MCAuto<MEDCoupling::MEDCouplingFieldFloat> ret(f1->field(mesh));
+        return MEDCoupling::DynamicCast<MEDCouplingFieldFloat,MEDCouplingField>(ret);
+      }
+  }
+  throw INTERP_KERNEL::Exception("MEDCoupling::ReadField : only FLOAT32, FLOAT64 and INT32 supported for the moment !");
+}
+
+MCAuto<MEDCoupling::MEDCouplingField> MEDCoupling::ReadField(MEDCoupling::TypeOfField type, const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
 {
   MEDCoupling::CheckFileForRead(fileName);
   switch(type)
@@ -1177,7 +1316,7 @@ std::vector<MEDCoupling::MEDCouplingFieldDouble *> MEDCoupling::ReadFieldsOnSame
   if(!mmuPtr)
     throw INTERP_KERNEL::Exception("ReadFieldsOnSameMesh : only unstructured mesh is managed !");
   MCAuto<MEDCouplingUMesh> m=mmuPtr->getMeshAtLevel(meshDimRelToMax);
-  const DataArrayInt *o2n=mmuPtr->getNumberFieldAtLevel(meshDimRelToMax);
+  const DataArrayIdType *o2n=mmuPtr->getNumberFieldAtLevel(meshDimRelToMax);
   MCAuto<MEDCouplingUMesh> m2(m->clone(true));
   if(o2n)
     m2->renumberCells(o2n->begin(),true);
@@ -1221,97 +1360,139 @@ std::vector<MEDCoupling::MEDCouplingFieldDouble *> MEDCoupling::ReadFieldsGaussN
   return ReadFieldsOnSameMesh(ON_GAUSS_NE,fileName,meshName,meshDimRelToMax,fieldName,its);
 }
 
-MEDCoupling::MEDCouplingFieldDouble *MEDCoupling::ReadFieldCell(const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
+namespace MEDCoupling
 {
-  MCAuto<MEDFileField1TS> ff(MEDFileField1TS::New(fileName,fieldName,iteration,order));
-  MCAuto<MEDFileMesh> mm(MEDFileMesh::New(fileName,meshName));
-  MCAuto<MEDCouplingMesh> m(mm->getMeshAtLevel(meshDimRelToMax,false));
-  MEDFileMesh *mPtr(mm);
-  MEDFileUMesh *muPtr=dynamic_cast<MEDFileUMesh *>(mPtr);
-  MCAuto<MEDCouplingFieldDouble> ret(ff->getFieldOnMeshAtLevel(ON_CELLS,m));
-  if(muPtr)
-    {
-      const DataArrayInt *num(muPtr->getNumberFieldAtLevel(meshDimRelToMax));
-      if(num)
-        ret->renumberCells(num->begin());
-    }
-  return ret.retn();
-}
+  template<class T>
+  MCAuto<typename Traits<T>::FieldType> ReadFieldCellLikeT(typename MLFieldTraits<T>::F1TSType *ff, MEDCoupling::TypeOfField type, const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
+  {
+    MCAuto<MEDFileMesh> mm(MEDFileMesh::New(fileName,meshName));
+    MCAuto<MEDFileUMesh> muPtr(MEDCoupling::DynamicCast<MEDFileMesh,MEDFileUMesh>(mm));
+    MCAuto<MEDCouplingMesh> m(mm->getMeshAtLevel(meshDimRelToMax,false));
+    MCAuto<typename Traits<T>::FieldType> ret(ff->getFieldOnMeshAtLevel(type,m));
+    if(muPtr.isNotNull())
+      {
+        const DataArrayIdType *num(muPtr->getNumberFieldAtLevel(meshDimRelToMax));
+        if(num)
+          ret->renumberCells(num->begin());
+      }
+    return ret;
+  }
 
-MEDCoupling::MEDCouplingFieldDouble *MEDCoupling::ReadFieldNode(const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
-{
-  MCAuto<MEDFileField1TS> ff(MEDFileField1TS::New(fileName,fieldName,iteration,order));
-  MCAuto<MEDFileMesh> mm(MEDFileMesh::New(fileName,meshName));
-  MCAuto<MEDCouplingMesh> m(mm->getMeshAtLevel(meshDimRelToMax,false));
-  MEDFileMesh *mPtr(mm);
-  MCAuto<MEDCouplingFieldDouble> ret(ff->getFieldOnMeshAtLevel(ON_NODES,m));
-  MEDFileUMesh *muPtr=dynamic_cast<MEDFileUMesh *>(mPtr);
-  if(ff->getPflsReallyUsed().empty())
+  MEDCoupling::MEDCouplingField *ReadFieldCellLike(MEDCoupling::TypeOfField type, const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
+  {
+    MCAuto<MEDFileAnyTypeField1TS> f(MEDFileAnyTypeField1TS::New(fileName,fieldName,iteration,order));
     {
-      if(muPtr)
+      MCAuto<MEDFileField1TS> f1(MEDCoupling::DynamicCast<MEDFileAnyTypeField1TS,MEDFileField1TS>(f));
+      if(f1.isNotNull())
         {
-          const DataArrayInt *num(muPtr->getNumberFieldAtLevel(meshDimRelToMax));
-          if(num)
-            ret->renumberCells(num->begin());
+          MCAuto<MEDCoupling::MEDCouplingFieldDouble> ret(ReadFieldCellLikeT<double>(f1,type,fileName,meshName,meshDimRelToMax,fieldName,iteration,order));
+          return ret.retn();
+        }
+    }
+    {
+      MCAuto<MEDFileInt32Field1TS> f1(MEDCoupling::DynamicCast<MEDFileAnyTypeField1TS,MEDFileInt32Field1TS>(f));
+      if(f1.isNotNull())
+        {
+          MCAuto<MEDCoupling::MEDCouplingFieldInt32> ret(ReadFieldCellLikeT<int>(f1,type,fileName,meshName,meshDimRelToMax,fieldName,iteration,order));
+          return ret.retn();
         }
     }
-  else
     {
-      DataArrayInt *pfl=0,*arr2=0;
-      MCAuto<DataArrayDouble> arr(ff->getFieldWithProfile(ON_NODES,meshDimRelToMax,mm,pfl));
-      MCAuto<DataArrayInt> pflSafe(pfl);
-      MCAuto<DataArrayInt> mp(m->getCellIdsFullyIncludedInNodeIds(pfl->begin(),pfl->end()));
-      MCAuto<MEDCouplingUMesh> mzip(static_cast<MEDCouplingUMesh *>(m->buildPartAndReduceNodes(mp->begin(),mp->end(),arr2)));
-      MCAuto<DataArrayInt> arr2Safe(arr2);
-      MCAuto<DataArrayInt> arr3(arr2->invertArrayO2N2N2O(mzip->getNumberOfNodes()));
-      MCAuto<DataArrayInt> pflSorted(pflSafe->deepCopy()); pflSorted->sort(true);
-      if(!arr3->isEqualWithoutConsideringStr(*pflSorted))
-        throw INTERP_KERNEL::Exception("ReadFieldNode : not implemented yet !");
-      if(!arr3->isEqualWithoutConsideringStr(*pflSafe))
+      MCAuto<MEDFileFloatField1TS> f1(MEDCoupling::DynamicCast<MEDFileAnyTypeField1TS,MEDFileFloatField1TS>(f));
+      if(f1.isNotNull())
         {
-          MCAuto<DataArrayInt> o2n2(pflSafe->checkAndPreparePermutation());
-          MCAuto<DataArrayInt> n2o2(o2n2->invertArrayO2N2N2O(o2n2->getNumberOfTuples()));
-          mzip->renumberNodes(n2o2->begin(),n2o2->getNumberOfTuples());
-          arr->setName("");
-          ret->setArray(arr);
+          MCAuto<MEDCoupling::MEDCouplingFieldFloat> ret(ReadFieldCellLikeT<float>(f1,type,fileName,meshName,meshDimRelToMax,fieldName,iteration,order));
+          return ret.retn();
         }
-      ret->setMesh(mzip);
     }
-  return ret.retn();
+    throw INTERP_KERNEL::Exception("MEDCoupling::ReadFieldCell : only FLOAT32, FLOAT64 and INT32 supported for the moment !");
+  }
+
+  template<class T>
+  MCAuto<typename Traits<T>::FieldType> ReadFieldNodeT(typename MLFieldTraits<T>::F1TSType *ff, const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
+  {
+    MCAuto<MEDFileMesh> mm(MEDFileMesh::New(fileName,meshName));
+    MCAuto<MEDCouplingMesh> m(mm->getMeshAtLevel(meshDimRelToMax,false));
+    MCAuto<typename Traits<T>::FieldType> ret(ff->getFieldOnMeshAtLevel(ON_NODES,m));
+    MCAuto<MEDFileUMesh> muPtr(MEDCoupling::DynamicCast<MEDFileMesh,MEDFileUMesh>(mm));
+    if(ff->getPflsReallyUsed().empty())
+      {
+        if(muPtr.isNotNull())
+          {
+            const DataArrayIdType *num(muPtr->getNumberFieldAtLevel(meshDimRelToMax));
+            if(num)
+              ret->renumberCells(num->begin());
+          }
+      }
+    else
+      {
+        DataArrayIdType *pfl(nullptr),*arr2(nullptr);
+        MCAuto<typename Traits<T>::ArrayType> arr(ff->getFieldWithProfile(ON_NODES,meshDimRelToMax,mm,pfl));
+        MCAuto<DataArrayIdType> pflSafe(pfl);
+        MCAuto<DataArrayIdType> mp(m->getCellIdsFullyIncludedInNodeIds(pfl->begin(),pfl->end()));
+        MCAuto<MEDCouplingUMesh> mzip(static_cast<MEDCouplingUMesh *>(m->buildPartAndReduceNodes(mp->begin(),mp->end(),arr2)));
+        MCAuto<DataArrayIdType> arr2Safe(arr2);
+        MCAuto<DataArrayIdType> arr3(arr2->invertArrayO2N2N2O(mzip->getNumberOfNodes()));
+        MCAuto<DataArrayIdType> pflSorted(pflSafe->deepCopy()); pflSorted->sort(true);
+        if(!arr3->isEqualWithoutConsideringStr(*pflSorted))
+          throw INTERP_KERNEL::Exception("ReadFieldNode : not implemented yet !");
+        if(!arr3->isEqualWithoutConsideringStr(*pflSafe))
+          {
+            MCAuto<DataArrayIdType> o2n2(pflSafe->checkAndPreparePermutation());
+            MCAuto<DataArrayIdType> n2o2(o2n2->invertArrayO2N2N2O(o2n2->getNumberOfTuples()));
+            mzip->renumberNodes(n2o2->begin(),n2o2->getNumberOfTuples());
+            arr->setName("");
+            ret->setArray(arr);
+          }
+        ret->setMesh(mzip);
+      }
+    return ret;
+  }
 }
 
-MEDCoupling::MEDCouplingFieldDouble *MEDCoupling::ReadFieldGauss(const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
+MEDCoupling::MEDCouplingField *MEDCoupling::ReadFieldCell(const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
 {
-  MCAuto<MEDFileField1TS> ff(MEDFileField1TS::New(fileName,fieldName,iteration,order));
-  MCAuto<MEDFileMesh> mm(MEDFileMesh::New(fileName,meshName));
-  MCAuto<MEDCouplingMesh> m(mm->getMeshAtLevel(meshDimRelToMax,false));
-  MEDFileMesh *mPtr(mm);
-  MEDFileUMesh *muPtr=dynamic_cast<MEDFileUMesh *>(mPtr);
-  MCAuto<MEDCouplingFieldDouble> ret(ff->getFieldOnMeshAtLevel(ON_GAUSS_PT,m));
-  if(muPtr)
-    {
-      const DataArrayInt *num(muPtr->getNumberFieldAtLevel(meshDimRelToMax));
-      if(num)
-        ret->renumberCells(num->begin());
-    }
-  return ret.retn();
+  return ReadFieldCellLike(ON_CELLS,fileName,meshName,meshDimRelToMax,fieldName,iteration,order);
 }
 
-MEDCoupling::MEDCouplingFieldDouble *MEDCoupling::ReadFieldGaussNE(const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
+MEDCoupling::MEDCouplingField *MEDCoupling::ReadFieldNode(const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
 {
-  MCAuto<MEDFileField1TS> ff(MEDFileField1TS::New(fileName,fieldName,iteration,order));
-  MCAuto<MEDFileMesh> mm(MEDFileMesh::New(fileName,meshName));
-  MCAuto<MEDCouplingMesh> m(mm->getMeshAtLevel(meshDimRelToMax,false));
-  MEDFileMesh *mPtr(mm);
-  MEDFileUMesh *muPtr=dynamic_cast<MEDFileUMesh *>(mPtr);
-  MCAuto<MEDCouplingFieldDouble> ret(ff->getFieldOnMeshAtLevel(ON_GAUSS_NE,m));
-  if(muPtr)
-    {
-      const DataArrayInt *num(muPtr->getNumberFieldAtLevel(meshDimRelToMax));
-      if(num)
-        ret->renumberCells(num->begin());
-    }
-  return ret.retn();
+  MCAuto<MEDFileAnyTypeField1TS> f(MEDFileAnyTypeField1TS::New(fileName,fieldName,iteration,order));
+  {
+    MCAuto<MEDFileField1TS> f1(MEDCoupling::DynamicCast<MEDFileAnyTypeField1TS,MEDFileField1TS>(f));
+    if(f1.isNotNull())
+      {
+        MCAuto<MEDCoupling::MEDCouplingFieldDouble> ret(ReadFieldNodeT<double>(f1,fileName,meshName,meshDimRelToMax,fieldName,iteration,order));
+        return ret.retn();
+      }
+  }
+  {
+    MCAuto<MEDFileInt32Field1TS> f1(MEDCoupling::DynamicCast<MEDFileAnyTypeField1TS,MEDFileInt32Field1TS>(f));
+    if(f1.isNotNull())
+      {
+        MCAuto<MEDCoupling::MEDCouplingFieldInt32> ret(ReadFieldNodeT<int>(f1,fileName,meshName,meshDimRelToMax,fieldName,iteration,order));
+        return ret.retn();
+      }
+  }
+  {
+    MCAuto<MEDFileFloatField1TS> f1(MEDCoupling::DynamicCast<MEDFileAnyTypeField1TS,MEDFileFloatField1TS>(f));
+    if(f1.isNotNull())
+      {
+        MCAuto<MEDCoupling::MEDCouplingFieldFloat> ret(ReadFieldNodeT<float>(f1,fileName,meshName,meshDimRelToMax,fieldName,iteration,order));
+        return ret.retn();
+      }
+  }
+  throw INTERP_KERNEL::Exception("MEDCoupling::ReadFieldNode : only FLOAT32, FLOAT64 and INT32 supported for the moment !");
+}
+
+MEDCoupling::MEDCouplingField *MEDCoupling::ReadFieldGauss(const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
+{
+  return ReadFieldCellLike(ON_GAUSS_PT,fileName,meshName,meshDimRelToMax,fieldName,iteration,order);
+}
+
+MEDCoupling::MEDCouplingField *MEDCoupling::ReadFieldGaussNE(const std::string& fileName, const std::string& meshName, int meshDimRelToMax, const std::string& fieldName, int iteration, int order)
+{
+  return ReadFieldCellLike(ON_GAUSS_NE,fileName,meshName,meshDimRelToMax,fieldName,iteration,order);
 }
 
 void MEDCoupling::WriteMesh(const std::string& fileName, const MEDCoupling::MEDCouplingMesh *mesh, bool writeFromScratch)
@@ -1398,31 +1579,32 @@ void MEDCoupling::WriteUMeshesPartitionDep(const std::string& fileName, const st
 
 void MEDCoupling::WriteUMeshes(const std::string& fileName, const std::vector<const MEDCoupling::MEDCouplingUMesh *>& meshes, bool writeFromScratch)
 {
-  int mod=writeFromScratch?2:0;
+  int mod(writeFromScratch?2:0);
   MCAuto<MEDFileUMesh> m(MEDFileUMesh::New());
   AssignStaticWritePropertiesTo(*m);
   m->setMeshes(meshes,true);
   m->write(fileName,mod);
 }
 
-void MEDLoaderNS::writeFieldWithoutReadingAndMappingOfMeshInFile(const std::string& fileName, const MEDCoupling::MEDCouplingFieldDouble *f, bool writeFromScratch)
+template<class T>
+void MEDLoaderNS::writeFieldWithoutReadingAndMappingOfMeshInFile(const std::string& fileName, const typename MEDCoupling::Traits<T>::FieldType *f, bool writeFromScratch)
 {
-  MCAuto<MEDFileField1TS> ff(MEDFileField1TS::New());
+  MCAuto< typename MLFieldTraits<T>::F1TSType > ff(MLFieldTraits<T>::F1TSType::New());
   AssignStaticWritePropertiesTo(*ff);
-  MCAuto<MEDCouplingFieldDouble> f2(f->deepCopy());
+  MCAuto<typename MEDCoupling::Traits<T>::FieldType> f2(f->deepCopy());
   const MEDCouplingMesh *m(f2->getMesh());
   const MEDCouplingUMesh *um(dynamic_cast<const MEDCouplingUMesh *>(m));
   const MEDCoupling1GTUMesh *um2(dynamic_cast<const MEDCoupling1GTUMesh *>(m));
   const MEDCouplingCMesh *um3(dynamic_cast<const MEDCouplingCMesh *>(m));
   const MEDCouplingCurveLinearMesh *um4(dynamic_cast<const MEDCouplingCurveLinearMesh *>(m));
   MCAuto<MEDFileMesh> mm;
-  int mod=writeFromScratch?2:0;
+  int mod(writeFromScratch?2:0);
   if(um)
     {
       MCAuto<MEDFileUMesh> mmu(MEDFileUMesh::New());
       AssignStaticWritePropertiesTo(*mmu);
-      MCAuto<DataArrayInt> o2n(um->getRenumArrForMEDFileFrmt());
-      MCAuto<DataArrayInt> n2o(o2n->invertArrayO2N2N2O(o2n->getNumberOfTuples()));
+      MCAuto<DataArrayIdType> o2n(um->getRenumArrForMEDFileFrmt());
+      MCAuto<DataArrayIdType> n2o(o2n->invertArrayO2N2N2O(o2n->getNumberOfTuples()));
       f2->renumberCells(o2n->begin(),false);
       mmu->setMeshAtLevel(0,const_cast<MEDCouplingUMesh *>(static_cast<const MEDCouplingUMesh *>(f2->getMesh())));
       mmu->setRenumFieldArr(0,n2o);
@@ -1458,12 +1640,13 @@ void MEDLoaderNS::writeFieldWithoutReadingAndMappingOfMeshInFile(const std::stri
   ff->write(fileName,0);
 }
 
-void MEDCoupling::WriteField(const std::string& fileName, const MEDCoupling::MEDCouplingFieldDouble *f, bool writeFromScratch)
+template<class T>
+void WriteFieldT(const std::string& fileName, const typename MEDCoupling::Traits<T>::FieldType *f, bool writeFromScratch)
 {
   if(!f)
     throw INTERP_KERNEL::Exception("WriteField : input field is NULL !");
   f->checkConsistencyLight();
-  int status=MEDLoaderBase::getStatusOfFile(fileName);
+  int status(MEDLoaderBase::getStatusOfFile(fileName));
   if(status!=MEDLoaderBase::EXIST_RW && status!=MEDLoaderBase::NOT_EXIST)
     {
       std::ostringstream oss; oss << "File with name \'" << fileName << "\' has not valid permissions !";
@@ -1471,44 +1654,47 @@ void MEDCoupling::WriteField(const std::string& fileName, const MEDCoupling::MED
     }
   if(writeFromScratch || (!writeFromScratch && status==MEDLoaderBase::NOT_EXIST))
     {
-      MEDLoaderNS::writeFieldWithoutReadingAndMappingOfMeshInFile(fileName,f,true);
+      MEDLoaderNS::writeFieldWithoutReadingAndMappingOfMeshInFile<T>(fileName,f,true);
     }
   else
     {
-      std::vector<std::string> meshNames=GetMeshNames(fileName);
+      std::vector<std::string> meshNames(GetMeshNames(fileName));
       if(!f->getMesh())
         throw INTERP_KERNEL::Exception("WriteField : trying to write a field with no mesh !");
       std::string fileNameCpp(f->getMesh()->getName());
       if(std::find(meshNames.begin(),meshNames.end(),fileNameCpp)==meshNames.end())
-        MEDLoaderNS::writeFieldWithoutReadingAndMappingOfMeshInFile(fileName,f,false);
+        MEDLoaderNS::writeFieldWithoutReadingAndMappingOfMeshInFile<T>(fileName,f,false);
       else
         {
           MCAuto<MEDFileMesh> mm(MEDFileMesh::New(fileName,f->getMesh()->getName().c_str()));
           AssignStaticWritePropertiesTo(*mm);
           const MEDFileMesh *mmPtr(mm);
-          const MEDFileUMesh *mmuPtr=dynamic_cast<const MEDFileUMesh *>(mmPtr);
+          const MEDFileUMesh *mmuPtr(dynamic_cast<const MEDFileUMesh *>(mmPtr));
           if(!mmuPtr)
             throw INTERP_KERNEL::Exception("WriteField : only umeshes are supported now !");
-          MCAuto<MEDCouplingFieldDouble> f2(f->deepCopy());
-          MEDCouplingUMesh *m=dynamic_cast<MEDCouplingUMesh *>(const_cast<MEDCouplingMesh *>(f2->getMesh()));
+          MCAuto< typename MEDCoupling::Traits<T>::FieldType > f2(f->deepCopy());
+          MEDCouplingUMesh *m(dynamic_cast<MEDCouplingUMesh *>(const_cast<MEDCouplingMesh *>(f2->getMesh())));
           if(!m)
             throw INTERP_KERNEL::Exception("WriteField : only umesh in input field supported !");
-          MCAuto<DataArrayInt> o2n=m->getRenumArrForMEDFileFrmt();
+          MCAuto<DataArrayIdType> o2n(m->getRenumArrForMEDFileFrmt());
           f2->renumberCells(o2n->begin(),false);
           m=static_cast<MEDCouplingUMesh *>(const_cast<MEDCouplingMesh *>(f2->getMesh()));
-          MCAuto<MEDCouplingUMesh> mread=mmuPtr->getMeshAtLevel(m->getMeshDimension()-mm->getMeshDimension());
+          MCAuto<MEDCouplingUMesh> mread(mmuPtr->getMeshAtLevel(m->getMeshDimension()-mm->getMeshDimension()));
           if(f2->getTypeOfField()!=ON_NODES)
             {
-              m->tryToShareSameCoordsPermute(*mread,_EPS_FOR_NODE_COMP);
-              DataArrayInt *part=0;
-              bool b=mread->areCellsIncludedIn(m,_COMP_FOR_CELL,part);
-              MCAuto<DataArrayInt> partSafe(part);
+              if(!m->getCoords()->isEqualWithoutConsideringStr(*mread->getCoords(),_EPS_FOR_NODE_COMP))
+                m->tryToShareSameCoordsPermute(*mread,_EPS_FOR_NODE_COMP);
+              else
+                mread->setCoords(m->getCoords());
+              DataArrayIdType *part(NULL);
+              bool b(mread->areCellsIncludedIn(m,_COMP_FOR_CELL,part));
+              MCAuto<DataArrayIdType> partSafe(part);
               if(!b)
                 {
                   std::ostringstream oss; oss << "WriteField : The file \""<< fileName << "\" already contains a mesh named \""<< f->getMesh()->getName() << "\" and this mesh in the file is not compatible (a subpart) with the mesh you intend to write ! This is maybe due to a too strict policy ! Try with to lease it by calling SetCompPolicyForCell !";
                   throw INTERP_KERNEL::Exception(oss.str().c_str());
                 }
-              MCAuto<MEDFileField1TS> f1ts(MEDFileField1TS::New());
+              MCAuto< typename MLFieldTraits<T>::F1TSType > f1ts(MLFieldTraits<T>::F1TSType::New());
               AssignStaticWritePropertiesTo(*f1ts);
               if(part->isIota(mread->getNumberOfCells()))
                 f1ts->setFieldNoProfileSBT(f2);
@@ -1522,15 +1708,15 @@ void MEDCoupling::WriteField(const std::string& fileName, const MEDCoupling::MED
             }
           else
             {
-              DataArrayInt *part=0;
-              bool b=mread->getCoords()->areIncludedInMe(m->getCoords(),_EPS_FOR_NODE_COMP,part);
-              MCAuto<DataArrayInt> partSafe(part);
+              DataArrayIdType *part(NULL);
+              bool b(mread->getCoords()->areIncludedInMe(m->getCoords(),_EPS_FOR_NODE_COMP,part));
+              MCAuto<DataArrayIdType> partSafe(part);
               if(!b)
                 {
                   std::ostringstream oss; oss << "WriteField : The file \""<< fileName << "\" already contains a mesh named \""<< f->getMesh()->getName() << "\" and this mesh in the file is not compatible (a subpart regarding nodes) with the mesh you intend to write ! This is maybe due to a too strict epsilon ! Try with to lease it by calling SetEpsilonForNodeComp !";
                   throw INTERP_KERNEL::Exception(oss.str().c_str());
                 }
-              MCAuto<MEDFileField1TS> f1ts(MEDFileField1TS::New());
+              MCAuto< typename MLFieldTraits<T>::F1TSType > f1ts(MLFieldTraits<T>::F1TSType::New());
               AssignStaticWritePropertiesTo(*f1ts);
               if(part->isIota(mread->getNumberOfNodes()))
                 f1ts->setFieldNoProfileSBT(f2);
@@ -1545,29 +1731,61 @@ void MEDCoupling::WriteField(const std::string& fileName, const MEDCoupling::MED
     }
 }
 
-void MEDCoupling::WriteFieldDep(const std::string& fileName, const MEDCoupling::MEDCouplingFieldDouble *f, bool writeFromScratch)
+void MEDCoupling::WriteField(const std::string& fileName, const MEDCoupling::MEDCouplingField *f, bool writeFromScratch)
+{
+  if(!f)
+    throw INTERP_KERNEL::Exception("WriteField : input field is null !");
+  {
+    const MEDCoupling::MEDCouplingFieldDouble *f1(dynamic_cast<const MEDCoupling::MEDCouplingFieldDouble *>(f));
+    if(f1)
+      {
+        WriteFieldT<double>(fileName,f1,writeFromScratch);
+        return ;
+      }
+  }
+  {
+    const MEDCoupling::MEDCouplingFieldInt32 *f1(dynamic_cast<const MEDCoupling::MEDCouplingFieldInt32 *>(f));
+    if(f1)
+      {
+        WriteFieldT<int>(fileName,f1,writeFromScratch);
+        return ;
+      }
+  }
+  {
+    const MEDCoupling::MEDCouplingFieldFloat *f1(dynamic_cast<const MEDCoupling::MEDCouplingFieldFloat *>(f));
+    if(f1)
+      {
+        WriteFieldT<float>(fileName,f1,writeFromScratch);
+        return ;
+      }
+  }
+  throw INTERP_KERNEL::Exception("WriteField : input field is not in FLOAT32, FLOAT64, INT32 !");
+}
+
+void MEDCoupling::WriteFieldDep(const std::string& fileName, const MEDCoupling::MEDCouplingField *f, bool writeFromScratch)
 {
   WriteField(fileName,f,writeFromScratch);
 }
 
-void MEDCoupling::WriteFieldUsingAlreadyWrittenMesh(const std::string& fileName, const MEDCoupling::MEDCouplingFieldDouble *f)
+template<class T>
+void WriteFieldUsingAlreadyWrittenMeshT(const std::string& fileName, const typename MEDCoupling::Traits<T>::FieldType *f)
 {
   if(!f)
-    throw INTERP_KERNEL::Exception("WriteFieldUsingAlreadyWrittenMesh : input field is null !");
+    throw INTERP_KERNEL::Exception("WriteFieldUsingAlreadyWrittenMeshT : input field is null !");
   f->checkConsistencyLight();
-  int status=MEDLoaderBase::getStatusOfFile(fileName);
+  int status(MEDLoaderBase::getStatusOfFile(fileName));
   if(status!=MEDLoaderBase::EXIST_RW)
     {
       std::ostringstream oss; oss << "File with name \'" << fileName << "\' has not valid permissions or not exists !";
       throw INTERP_KERNEL::Exception(oss.str().c_str());
     }
-  MCAuto<MEDFileField1TS> f1ts(MEDFileField1TS::New());
+  MCAuto< typename MLFieldTraits<T>::F1TSType > f1ts(MLFieldTraits<T>::F1TSType::New());
   AssignStaticWritePropertiesTo(*f1ts);
   MEDCouplingUMesh *m(dynamic_cast<MEDCouplingUMesh *>(const_cast<MEDCouplingMesh *>(f->getMesh())));
   if(m)
     {
-      MCAuto<DataArrayInt> o2n(m->getRenumArrForMEDFileFrmt());
-      MCAuto<MEDCouplingFieldDouble> f2(f->deepCopy());
+      MCAuto<DataArrayIdType> o2n(m->getRenumArrForMEDFileFrmt());
+      MCAuto< typename MEDCoupling::Traits<T>::FieldType > f2(f->deepCopy());
       f2->renumberCells(o2n->begin(),false);
       f1ts->setFieldNoProfileSBT(f2);
     }
@@ -1575,3 +1793,28 @@ void MEDCoupling::WriteFieldUsingAlreadyWrittenMesh(const std::string& fileName,
     f1ts->setFieldNoProfileSBT(f);
   f1ts->write(fileName,0);
 }
+
+void MEDCoupling::WriteFieldUsingAlreadyWrittenMesh(const std::string& fileName, const MEDCoupling::MEDCouplingField *f)
+{
+  if(!f)
+    throw INTERP_KERNEL::Exception("WriteFieldUsingAlreadyWrittenMesh : input field is null !");
+  {
+    const MEDCoupling::MEDCouplingFieldDouble *f1(dynamic_cast<const MEDCoupling::MEDCouplingFieldDouble *>(f));
+    if(f1)
+      WriteFieldUsingAlreadyWrittenMeshT<double>(fileName,f1);
+    return ;
+  }
+  {
+    const MEDCoupling::MEDCouplingFieldInt32 *f1(dynamic_cast<const MEDCoupling::MEDCouplingFieldInt32 *>(f));
+    if(f1)
+      WriteFieldUsingAlreadyWrittenMeshT<int>(fileName,f1);
+    return ;
+  }
+  {
+    const MEDCoupling::MEDCouplingFieldFloat *f1(dynamic_cast<const MEDCoupling::MEDCouplingFieldFloat *>(f));
+    if(f1)
+      WriteFieldUsingAlreadyWrittenMeshT<float>(fileName,f1);
+    return ;
+  }
+  throw INTERP_KERNEL::Exception("WriteFieldUsingAlreadyWrittenMesh : input field is not in FLOAT32, FLOAT64, INT32 !");
+}