usecases/c/UsesCase_MEDfield_12.c

/*  This file is part of MED.
 *
 *  COPYRIGHT (C) 1999 - 2015  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/>.
 */

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

#include <string.h>

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

#include <string.h>

/* 
 * Field use case 12 : read a field (generic approach) in a MED file with computing steps,
 *                     profiles, integration points and interpolation families   
 */


int main (int argc, char **argv) {
  med_idt fid;
  med_idt nfield, i, j;
  char meshname[MED_NAME_SIZE+1]="";
  med_bool localmesh;
  char fieldname[MED_NAME_SIZE+1]="";
  med_field_type fieldtype;
  char *componentname = NULL;
  char *componentunit = NULL;
  char dtunit[MED_SNAME_SIZE+1]="";
  med_float *values = NULL;
  med_int nstep, nvalues;
  med_int ncomponent;
  med_int csit, numit, numdt, it;
  med_float dt;
  med_geometry_type geotype;
  med_geometry_type *geotypes = MED_GET_CELL_GEOMETRY_TYPE;
  med_int nprofile, pit, profilesize;
  char profilename[MED_NAME_SIZE+1]="";
  med_int nintegrationpoint;
  char localizationname[MED_NAME_SIZE+1]="";
  int k;
  med_int ninterp;
  char interpname[MED_NAME_SIZE+1];
  int ret=-1;


  /* open file */
  fid = MEDfileOpen("UsesCase_MEDfield_10.med",MED_ACC_RDONLY);
  if (fid < 0) {
    MESSAGE("ERROR : open file ...");
    return -1;
  }

  /*
   * generic approach : how many fields in the file and identification
   * of each field.
   */
  if ((nfield = MEDnField(fid)) < 0) {
    MESSAGE("ERROR : How many fields in the file ...");
    return -1;
  }

  /* 
   * read values for each field
   */
  for (i=0; i<nfield; i++) {

    if ((ncomponent = MEDfieldnComponent(fid,i+1)) < 0) {
      MESSAGE("ERROR : number of field component ...");
      return -1;
    }
    
    if ((componentname = (char *) malloc(ncomponent*MED_SNAME_SIZE+1)) == NULL) {
      MESSAGE("ERROR : memory allocation ...");
      return -1;
    }

    if ((componentunit = (char *) malloc(ncomponent*MED_SNAME_SIZE+1)) == NULL) {
      MESSAGE("ERROR : memory allocation ...");
      return -1;
    }    

    if (MEDfieldInfo(fid, i+1, fieldname, meshname, &localmesh, &fieldtype,
                     componentname, componentunit, dtunit, &nstep) < 0) {
      MESSAGE("ERROR : Field info ...");
      free(componentname);
      free(componentunit);
      return -1;
    }

    free(componentname);
    free(componentunit);

    /* 
     * Read how many interpolation family name in the field ?  
     */
    if ((ninterp = MEDfieldnInterp(fid, fieldname)) < 0) {
      MESSAGE("ERROR : Read how many interpolation functions for the field ...");
      return -1;
    }
    /* - Read each interlolation family name 
     * - The way to read an interploation family and it's basis functions 
     *  is described in UsesCase_MEDinterp_2 and UsesCase_MEDinterp_3 uses case
     */
    for (it=0; it<ninterp; it++) {
      if (MEDfieldInterpInfo(fid,fieldname,it+1,interpname) < 0) {
        MESSAGE("ERROR : read interpolation family name ...");
        return -1;
      }
    }

    /*
     * Read field values for each computing step 
     */ 
    for (csit=0; csit<nstep; csit++) {

      if (MEDfieldComputingStepInfo(fid, fieldname, csit+1, &numdt, &numit, &dt) < 0) {
        MESSAGE("ERROR : Computing step info ...");
        return -1;
      }

      /* 
       * ... In our case, we suppose that the field values are only defined on cells ... 
       */
      for (it=1; it<=MED_N_CELL_FIXED_GEO; it++) {

        geotype = geotypes[it];

        /*
         * How many profile for each geometry type ? 
         */
        if ((nprofile = MEDfieldnProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
                                         profilename, localizationname)) < 0) {
          MESSAGE("ERROR : read number of profile ");
          return -1;
        }

        /* 
         * Read values for each profile
         */
        for (pit=0; pit<nprofile; pit++) {
          
          if ((nvalues = MEDfieldnValueWithProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
                                                   pit+1, MED_COMPACT_PFLMODE, profilename, &profilesize,
                                                   localizationname, &nintegrationpoint)) < 0) {
            MESSAGE("ERROR : read number of values with a profile ...");
            return -1;
          } 
          
          if (nvalues) {
            if ((values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent*nintegrationpoint)) == NULL) {
              MESSAGE("ERROR : memory allocation ...");
              return -1;
            }
            if (MEDfieldValueWithProfileRd(fid, fieldname, numdt, numit, MED_CELL, geotype,
                                           MED_COMPACT_PFLMODE, profilename,
                                           MED_FULL_INTERLACE, MED_ALL_CONSTITUENT, 
                                           (unsigned char*) values) < 0) {
              MESSAGE("ERROR : read fields values for cells ..."); 
              free(values);
              return -1; 
            }  
            free(values);
          }
        }
      }
    }
  }
  
  ret=0;
 ERROR:

  /* close file */
  if (MEDfileClose(fid) < 0) {
    MESSAGE("ERROR : close file ...");             
    ret=-1; 
  } 
  
  return ret;
}

Généré le Thu Oct 8 14:26:16 2015 pour MED fichier par  doxygen 1.6.1