# c/test7.c

    /*  This file is part of MED.
     *
     *  COPYRIGHT (C) 1999 - 2012  EDF R&D, CEA/DEN
     *  MED is free software: you can redistribute it and/or modify
     *  it under the terms of the GNU Lesser General Public License as published by
     *  the Free Software Foundation, either version 3 of the License, or
     *  (at your option) any later version.
     *
     *  MED is distributed in the hope that it will be useful,
     *  but WITHOUT ANY WARRANTY; without even the implied warranty of
     *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     *  GNU Lesser General Public License for more details.
     *
     *  You should have received a copy of the GNU Lesser General Public License
     *  along with MED.  If not, see <http://www.gnu.org/licenses/>.
     */

    /******************************************************************************
     * - Nom du fichier : test7.c
     *
     * - Description : lecture des elements du maillage MED crees par test6
     *
     *****************************************************************************/

    #include <med.h>
    #define MESGERR 1
    #include "med_utils.h"
    #include <string.h>

    #ifdef DEF_LECT_ECR
    #define MODE_ACCES MED_ACC_RDWR
    #elif DEF_LECT_AJOUT
    #define MODE_ACCES MED_ACC_RDEXT
    #else
    #define MODE_ACCES MED_ACC_CREAT
    #endif

    int main (int argc, char **argv)

    {
      med_err ret = 0;
      med_idt fid;
      med_int nse2;
      med_int *se2_1;
      med_int *se2_2;
      char *nomse2;
      med_int *numse2;
      med_int *nufase2;
      med_int ntr3;
      med_int *tr3;
      char *nomtr3;
      med_int *numtr3;
      med_int *nufatr3;
      char maa[MED_NAME_SIZE+1] ="maa1";
      med_int mdim=0,sdim=0;
      med_bool inoele=MED_FALSE,inuele=MED_FALSE,chgt=MED_FALSE,trsf=MED_FALSE;
      med_int tse2,ttr3;
      char str[MED_SNAME_SIZE+1];
      med_int flt[2] = { 2, 3 }, fltsize=2;
      char desc[MED_COMMENT_SIZE+1];
      char dtunit[MED_SNAME_SIZE+1]="";
      char nomcoo[2*MED_SNAME_SIZE+1];
      char unicoo[2*MED_SNAME_SIZE+1];
      med_mesh_type type;
      med_sorting_type sort;
      med_int nstep=0,i=0;
      med_filter filter=MED_FILTER_INIT;
      med_axis_type rep;
      med_int nname=0;

      /* Ouverture du fichier en mode lecture seule */
      if ((fid = MEDfileOpen("test6.med",MED_ACC_RDONLY)) < 0) {
        MESSAGE("Erreur a l'ouverture du fichier test6.med");
        return -1;
      }
      if ((sdim=MEDmeshnAxis(fid, 1)) <0) {
        MESSAGE("Erreur a la lecture de la dimension de l'espace du maillage :");
        SSCRUTE(maa);
        return -1;
      }

      /* Lecture des infos concernant le premier maillage */
      if ( MEDmeshInfo( fid, 1,  maa, &sdim, &mdim, &type, desc, dtunit, &sort,
                        &nstep,  &rep, nomcoo,unicoo) < 0 ) {
        MESSAGE("Erreur a la lecture des informations sur le maillage : ");SSCRUTE(maa);
        return -1;
      } else {
        printf("Maillage de nom : |%s| , de dimension : "IFORMAT" , et de type %d\n",maa,mdim,type);
        printf("\t -Dimension de l'espace : "IFORMAT"\n",sdim);
        printf("\t -Description du maillage : %s\n",desc);
        printf("\t -Noms des axes : |%s|\n",nomcoo);
        printf("\t -Unités des axes : |%s|\n",unicoo);
        printf("\t -Type de repère : %d\n",rep);
        printf("\t -Nombre d'étapes de calcul : "IFORMAT"\n",nstep);
        printf("\t -Unité des dates : |%s|\n",dtunit);
      }

      /* Combien de triangles et de segments */
      if ((nse2 = MEDmeshnEntity(fid, maa, MED_NO_DT, MED_NO_IT,
                                  MED_DESCENDING_EDGE, MED_SEG2,MED_CONNECTIVITY, MED_DESCENDING,
                                 &chgt, &trsf)) < 0)  {
        MESSAGE("Erreur a la lecture du nombre de faces MED_SEG2");
        return -1;
      }

      if ((ntr3 = MEDmeshnEntity(fid, maa, MED_NO_DT, MED_NO_IT,
                                 MED_CELL,MED_TRIA3,MED_CONNECTIVITY, MED_DESCENDING,
                                 &chgt, &trsf))<0) {
        MESSAGE("Erreur a la lecture du nombre de mailles MED_TRIA3");
        return -1;
      }
      printf("Nombre de MED_SEG2 : "IFORMAT" - nombre de MED_TRIA3 : "IFORMAT"\n",nse2,ntr3);

      /* Allocations memoire */
      tse2    = 2;
      se2_1   = (med_int*) calloc(tse2*nse2,sizeof(med_int));
      se2_2   = (med_int*) malloc(sizeof(med_int)*tse2*nse2);
      nomse2  = (char*)    malloc(MED_SNAME_SIZE*nse2+1);
      numse2  = (med_int*) malloc(sizeof(med_int)*nse2);
      nufase2 = (med_int*) malloc(sizeof(med_int)*nse2);

      ttr3    = 3;
      tr3     = (med_int*) malloc(sizeof(med_int)*ntr3*ttr3);
      nomtr3  = (char*)    malloc(MED_SNAME_SIZE*ntr3+1);
      numtr3  = (med_int*) malloc(sizeof(med_int)*ntr3);
      nufatr3 = (med_int*) malloc(sizeof(med_int)*ntr3);

      if ( MEDfilterEntityCr( fid, nse2, 1, sdim, 2,
                              MED_FULL_INTERLACE, MED_GLOBAL_PFLMODE,
                              MED_NO_PROFILE, fltsize,
                              flt, &filter) < 0 ) {
        MESSAGE("Erreur à la crétion du filtre 1.");
      }

      /* Lecture des connectivites des segments avec flt */
      if (MEDmeshElementConnectivityAdvancedRd(fid, maa, MED_NO_DT, MED_NO_IT,
                                               MED_DESCENDING_EDGE, MED_SEG2, MED_DESCENDING, &filter,
                                               se2_1) < 0) {
        MESSAGE("Erreur a la lecture de la connectivite des segments");
        return -1;
      }

      MEDfilterClose(&filter);

      /* Lecture de la connectivite des segments */
      if (MEDmeshElementConnectivityRd(fid, maa, MED_NO_DT, MED_NO_IT,
                                       MED_DESCENDING_EDGE, MED_SEG2, MED_DESCENDING,
                                       MED_FULL_INTERLACE, se2_2) < 0) {
        MESSAGE("Erreur a la lecture de la connectivite des segments");
        return -1;
      }

      /* Lecture (optionnelle) des noms des segments */
      if (MEDmeshEntityNameRd(fid, maa, MED_NO_DT, MED_NO_IT,
                              MED_DESCENDING_EDGE, MED_SEG2,nomse2) < 0)
        inoele = MED_FALSE;
      else
        inoele = MED_TRUE;

      /* Test complémentaire */
      if ((nname = MEDmeshnEntity(fid, maa, MED_NO_DT, MED_NO_IT,
                                  MED_DESCENDING_EDGE,MED_SEG2,MED_NAME, MED_NO_CMODE,
                                  &chgt, &trsf))<0) {
        MESSAGE("Erreur a la lecture du nombre de nom de mailles MED_SEG2");
        return -1;
      }
      printf("Nombre de nom de MED_SEG2 : "IFORMAT" \n",nname);

      /* Lecture (optionnelle) des numeros des segments */
      if ( MEDmeshEntityNumberRd(fid, maa, MED_NO_DT, MED_NO_IT,
                                MED_DESCENDING_EDGE, MED_SEG2, numse2) < 0)
        inuele = MED_FALSE;
      else
        inuele = MED_TRUE;

      /* Lecture des numeros des familles des segments */
      if (MEDmeshEntityFamilyNumberRd(fid,maa, MED_NO_DT, MED_NO_IT,
                                      MED_DESCENDING_EDGE, MED_SEG2,nufase2) < 0) {
        MESSAGE("Erreur a la lecture des numéros de famille des segments");
        return -1;
      }

      /* Lecture de la connectivite des triangles */
      if (MEDmeshElementConnectivityRd(fid, maa, MED_NO_DT, MED_NO_IT,
                                       MED_CELL, MED_TRIA3, MED_DESCENDING,
                                       MED_FULL_INTERLACE, tr3) < 0) {
        MESSAGE("Erreur a la lecture de la connectivite des triangles");
        return -1;
      }

      /* Lecture (optionnelle) des noms des triangles */
      if (MEDmeshEntityNameRd(fid, maa, MED_NO_DT, MED_NO_IT,
                              MED_CELL, MED_TRIA3, nomtr3) < 0)
        inoele = MED_FALSE;
      else
        inoele = MED_TRUE;

      /* Lecture (optionnelle) des numeros des triangles */
      if (MEDmeshEntityNumberRd(fid, maa, MED_NO_DT, MED_NO_IT,
                                MED_CELL, MED_TRIA3, numtr3) < 0)
        inuele = MED_FALSE;
      else
        inuele = MED_TRUE;

      /* Lecture des numeros des familles des triangles */
      if ( (ret = MEDmeshEntityFamilyNumberRd(fid,maa, MED_NO_DT, MED_NO_IT,
                                              MED_CELL, MED_TRIA3,nufatr3)) < 0) {
        MESSAGE("Erreur a la lecture des numeros de famille des segments");
        return -1;
      }

      /* Fermeture du fichier */
      if (MEDfileClose(fid) < 0) {
        MESSAGE("Erreur a la fermeture du fichier");
        return -1;
      }

      /* Affichage */
      if (ret == 0) {
        printf("Connectivite des segments (1): \n");
        for (i=0;i<nse2*tse2;i++)
          printf(IFORMAT" ",*(se2_1+i));
        printf("\n");
        printf("Connectivite des segments (2): \n");
        for (i=0;i<nse2*tse2;i++)
          printf(IFORMAT" ",*(se2_2+i));
        if (inoele) {
          printf("\nNoms des segments :\n");
          for (i=0;i<nse2;i++) {
            strncpy(str,nomse2+i*MED_SNAME_SIZE,MED_SNAME_SIZE);
            str[MED_SNAME_SIZE] = '\0';
            printf("|%s| ",str);
          }
        }
        if (inuele) {
          printf("\nNumeros des segments :\n");
          for (i=0;i<nse2;i++)
            printf(IFORMAT" ",*(numse2+i));
        }
        printf("\nNumeros des familles des segments :\n");
        for (i=0;i<nse2;i++)
          printf(IFORMAT" ",*(nufase2+i));

        printf("\nConnectivite des triangles : \n");
        for (i=0;i<ntr3*ttr3;i++)
          printf(IFORMAT" ",*(tr3+i));
        if (inoele) {
          printf("\nNoms des triangles :\n");
          for (i=0;i<ntr3;i++) {
            strncpy(str,nomtr3+i*MED_SNAME_SIZE,MED_SNAME_SIZE);
            str[MED_SNAME_SIZE] = '\0';
            printf("|%s| ",str);
          }
        }
        if (inuele) {
          printf("\nNumeros des triangles :\n");
          for (i=0;i<ntr3;i++)
            printf(IFORMAT" ",*(numtr3+i));
        }
        printf("\nNumeros des familles des triangles :\n");
        for (i=0;i<ntr3;i++)
          printf(IFORMAT" ",*(nufatr3+i));

        printf("\n");
      }

      /* Nettoyage memoire */
      free(se2_1);
      free(se2_2);
      free(nomse2);
      free(numse2);
      free(nufase2);

      free(tr3);
      free(nomtr3);
      free(numtr3);
      free(nufatr3);

      return ret;
    }