UsesCase_MEDfield_12.c

Aller à la documentation de ce fichier.
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 12 : read a field (generic approach) in a MED file with computing steps,
00032  *                     profiles, integration points and interpolation families   
00033  */
00034 
00035 
00036 int main (int argc, char **argv) {
00037   med_idt fid;
00038   med_idt nfield, i, j;
00039   char meshname[MED_NAME_SIZE+1]="";
00040   med_bool localmesh;
00041   char fieldname[MED_NAME_SIZE+1]="";
00042   med_field_type fieldtype;
00043   char *componentname = NULL;
00044   char *componentunit = NULL;
00045   char dtunit[MED_SNAME_SIZE+1]="";
00046   med_float *values = NULL;
00047   med_int nstep, nvalues;
00048   med_int ncomponent;
00049   med_int csit, numit, numdt, it;
00050   med_float dt;
00051   med_geometry_type geotype;
00052   med_geometry_type *geotypes = MED_GET_CELL_GEOMETRY_TYPE;
00053   med_int nprofile, pit, profilesize;
00054   char profilename[MED_NAME_SIZE+1]="";
00055   med_int nintegrationpoint;
00056   char localizationname[MED_NAME_SIZE+1]="";
00057   int k;
00058   med_int ninterp;
00059   char interpname[MED_NAME_SIZE+1];
00060   int ret=-1;
00061 
00062 
00063   /* open file */
00064   fid = MEDfileOpen("UsesCase_MEDfield_10.med",MED_ACC_RDONLY);
00065   if (fid < 0) {
00066     MESSAGE("ERROR : open file ...");
00067     return -1;
00068   }
00069 
00070   /*
00071    * generic approach : how many fields in the file and identification
00072    * of each field.
00073    */
00074   if ((nfield = MEDnField(fid)) < 0) {
00075     MESSAGE("ERROR : How many fields in the file ...");
00076     return -1;
00077   }
00078 
00079   /* 
00080    * read values for each field
00081    */
00082   for (i=0; i<nfield; i++) {
00083 
00084     if ((ncomponent = MEDfieldnComponent(fid,i+1)) < 0) {
00085       MESSAGE("ERROR : number of field component ...");
00086       return -1;
00087     }
00088     
00089     if ((componentname = (char *) malloc(ncomponent*MED_SNAME_SIZE+1)) == NULL) {
00090       MESSAGE("ERROR : memory allocation ...");
00091       return -1;
00092     }
00093 
00094     if ((componentunit = (char *) malloc(ncomponent*MED_SNAME_SIZE+1)) == NULL) {
00095       MESSAGE("ERROR : memory allocation ...");
00096       return -1;
00097     }    
00098 
00099     if (MEDfieldInfo(fid, i+1, fieldname, meshname, &localmesh, &fieldtype,
00100                      componentname, componentunit, dtunit, &nstep) < 0) {
00101       MESSAGE("ERROR : Field info ...");
00102       free(componentname);
00103       free(componentunit);
00104       return -1;
00105     }
00106 
00107     free(componentname);
00108     free(componentunit);
00109 
00110     /* 
00111      * Read how many interpolation family name in the field ?  
00112      */
00113     if ((ninterp = MEDfieldnInterp(fid, fieldname)) < 0) {
00114       MESSAGE("ERROR : Read how many interpolation functions for the field ...");
00115       return -1;
00116     }
00117     /* - Read each interlolation family name 
00118      * - The way to read an interploation family and it's basis functions 
00119      *  is described in UsesCase_MEDinterp_2 and UsesCase_MEDinterp_3 uses case
00120      */
00121     for (it=0; it<ninterp; it++) {
00122       if (MEDfieldInterpInfo(fid,fieldname,it+1,interpname) < 0) {
00123         MESSAGE("ERROR : read interpolation family name ...");
00124         return -1;
00125       }
00126     }
00127 
00128     /*
00129      * Read field values for each computing step 
00130      */ 
00131     for (csit=0; csit<nstep; csit++) {
00132 
00133       if (MEDfieldComputingStepInfo(fid, fieldname, csit+1, &numdt, &numit, &dt) < 0) {
00134         MESSAGE("ERROR : Computing step info ...");
00135         return -1;
00136       }
00137 
00138       /* 
00139        * ... In our case, we suppose that the field values are only defined on cells ... 
00140        */
00141       for (it=1; it<=MED_N_CELL_FIXED_GEO; it++) {
00142 
00143         geotype = geotypes[it];
00144 
00145         /*
00146          * How many profile for each geometry type ? 
00147          */
00148         if ((nprofile = MEDfieldnProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
00149                                          profilename, localizationname)) < 0) {
00150           MESSAGE("ERROR : read number of profile ");
00151           return -1;
00152         }
00153 
00154         /* 
00155          * Read values for each profile
00156          */
00157         for (pit=0; pit<nprofile; pit++) {
00158           
00159           if ((nvalues = MEDfieldnValueWithProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
00160                                                    pit+1, MED_COMPACT_PFLMODE, profilename, &profilesize,
00161                                                    localizationname, &nintegrationpoint)) < 0) {
00162             MESSAGE("ERROR : read number of values with a profile ...");
00163             return -1;
00164           } 
00165           
00166           if (nvalues) {
00167             if ((values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent*nintegrationpoint)) == NULL) {
00168               MESSAGE("ERROR : memory allocation ...");
00169               return -1;
00170             }
00171             if (MEDfieldValueWithProfileRd(fid, fieldname, numdt, numit, MED_CELL, geotype,
00172                                            MED_COMPACT_PFLMODE, profilename,
00173                                            MED_FULL_INTERLACE, MED_ALL_CONSTITUENT, 
00174                                            (unsigned char*) values) < 0) {
00175               MESSAGE("ERROR : read fields values for cells ..."); 
00176               free(values);
00177               return -1; 
00178             }  
00179             free(values);
00180           }
00181         }
00182       }
00183     }
00184   }
00185   
00186   ret=0;
00187  ERROR:
00188 
00189   /* close file */
00190   if (MEDfileClose(fid) < 0) {
00191     MESSAGE("ERROR : close file ...");             
00192     ret=-1; 
00193   } 
00194   
00195   return ret;
00196 }

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