UsesCase_MEDfield_14.c

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00001 /*  This file is part of MED.
00002  *
00003  *  COPYRIGHT (C) 1999 - 2015  EDF R&D, CEA/DEN
00004  *  MED is free software: you can redistribute it and/or modify
00005  *  it under the terms of the GNU Lesser General Public License as published by
00006  *  the Free Software Foundation, either version 3 of the License, or
00007  *  (at your option) any later version.
00008  *
00009  *  MED is distributed in the hope that it will be useful,
00010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  *  GNU Lesser General Public License for more details.
00013  *
00014  *  You should have received a copy of the GNU Lesser General Public License
00015  *  along with MED.  If not, see <http://www.gnu.org/licenses/>.
00016  */
00017 
00018 #include <med.h>
00019 #define MESGERR 1
00020 #include <med_utils.h>
00021 
00022 #include <string.h>
00023 
00024 #include <med.h>
00025 #define MESGERR 1
00026 #include <med_utils.h>
00027 
00028 #include <string.h>
00029 
00030 /* 
00031  * Field use case 14 : read a field on nodes elements (generic approach) in a MED file
00032  */
00033 
00034 
00035 int main (int argc, char **argv) {
00036   med_idt fid;
00037   med_idt nfield, i, j;
00038   char meshname[MED_NAME_SIZE+1]="";
00039   med_bool localmesh;
00040   char fieldname[MED_NAME_SIZE+1]="";
00041   med_field_type fieldtype;
00042   char *componentname = NULL;
00043   char *componentunit = NULL;
00044   char dtunit[MED_SNAME_SIZE+1]="";
00045   med_float *values = NULL;
00046   med_int nstep, nvalues;
00047   med_int ncomponent;
00048   med_int csit, numit, numdt, it;
00049   med_float dt;
00050   med_geometry_type geotype;
00051   med_geometry_type *geotypes = MED_GET_CELL_GEOMETRY_TYPE;
00052   med_int nprofile, pit, profilesize;
00053   char profilename[MED_NAME_SIZE+1]="";
00054   med_int nintegrationpoint;
00055   char localizationname[MED_NAME_SIZE+1]="";
00056   int k;
00057   int ret=-1;
00058 
00059   /* open file */
00060   fid = MEDfileOpen("UsesCase_MEDfield_13.med",MED_ACC_RDONLY);
00061   if (fid < 0) {
00062     MESSAGE("ERROR : open file ...");
00063     goto ERROR;
00064   }
00065 
00066   /*
00067    * generic approach : how many fields in the file and identification
00068    * of each field.
00069    */
00070   if ((nfield = MEDnField(fid)) < 0) {
00071     MESSAGE("ERROR : How many fields in the file ...");
00072     goto ERROR;
00073   }
00074 
00075   /* 
00076    * read values for each field
00077    */
00078   for (i=0; i<nfield; i++) {
00079 
00080     if ((ncomponent = MEDfieldnComponent(fid,i+1)) < 0) {
00081       MESSAGE("ERROR : number of field component ...");
00082       goto ERROR;
00083     }
00084     
00085     if ((componentname = (char *) malloc(ncomponent*MED_SNAME_SIZE+1)) == NULL) {
00086       MESSAGE("ERROR : memory allocation ...");
00087       goto ERROR;
00088     }
00089 
00090     if ((componentunit = (char *) malloc(ncomponent*MED_SNAME_SIZE+1)) == NULL) {
00091       MESSAGE("ERROR : memory allocation ...");
00092       goto ERROR;
00093     }    
00094 
00095     if (MEDfieldInfo(fid, i+1, fieldname, meshname, &localmesh, &fieldtype,
00096                      componentname, componentunit, dtunit, &nstep) < 0) {
00097       MESSAGE("ERROR : Field info ...");
00098       free(componentname);
00099       free(componentunit);
00100       goto ERROR;
00101     }
00102 
00103     free(componentname);
00104     free(componentunit);
00105 
00106     /*
00107      * Read field values for each computing step 
00108      */ 
00109     for (csit=0; csit<nstep; csit++) {
00110 
00111       if (MEDfieldComputingStepInfo(fid, fieldname, csit+1, &numdt, &numit, &dt) < 0) {
00112         MESSAGE("ERROR : Computing step info ...");
00113         goto ERROR;
00114       }
00115 
00116       /* 
00117        * ... In our case, we suppose that the field values are only defined on nodes element ... 
00118        */
00119       for (it=1; it<= MED_N_CELL_FIXED_GEO; it++) {
00120 
00121         geotype = geotypes[it];
00122         /*
00123          * How many profile for each geometry type ? 
00124          */
00125         if ((nprofile = MEDfieldnProfile(fid, fieldname, numdt, numit, MED_NODE_ELEMENT, geotype,
00126                                          profilename, localizationname)) < 0) {
00127           MESSAGE("ERROR : read number of profile ");
00128           goto ERROR;
00129         }
00130 
00131         /* 
00132          * Read values for each profile
00133          */
00134         for (pit=0; pit<nprofile; pit++) {
00135           
00136           if ((nvalues = MEDfieldnValueWithProfile(fid, fieldname, numdt, numit, MED_NODE_ELEMENT, geotype,
00137                                                    pit+1, MED_COMPACT_PFLMODE, profilename, &profilesize,
00138                                                    localizationname, &nintegrationpoint)) < 0) {
00139             MESSAGE("ERROR : read number of values with a profile ...");
00140             goto ERROR;
00141           } 
00142           
00143           if (nvalues) {
00144             if ((values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent*nintegrationpoint)) == NULL) {
00145               MESSAGE("ERROR : memory allocation ...");
00146               goto ERROR;
00147             }
00148             if (MEDfieldValueWithProfileRd(fid, fieldname, numdt, numit, MED_NODE_ELEMENT, geotype,
00149                                            MED_COMPACT_PFLMODE, profilename,
00150                                            MED_FULL_INTERLACE, MED_ALL_CONSTITUENT, 
00151                                            (unsigned char*) values) < 0) {
00152               MESSAGE("ERROR : read fields values for cells ..."); 
00153               free(values);
00154               goto ERROR; 
00155             }  
00156             free(values);
00157           }
00158         }
00159       }
00160     }
00161   }
00162 
00163   ret=0;
00164  ERROR:
00165 
00166   /* close file */
00167   if (MEDfileClose(fid) < 0) {
00168     MESSAGE("ERROR : close file ...");             
00169     ret=-1; 
00170   } 
00171   
00172   return ret;
00173 }

Généré le Thu Oct 8 14:26:17 2015 pour MED fichier par  doxygen 1.6.1